Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

33 files changed, 15342 insertions, 0 deletions

diff --git a/mozglue/baseprofiler/core/BaseAndGeckoProfilerDetail.cpp b/mozglue/baseprofiler/core/BaseAndGeckoProfilerDetail.cpp
new file mode 100644
index 0000000000..213f25cf16
--- /dev/null
+++ b/mozglue/baseprofiler/core/BaseAndGeckoProfilerDetail.cpp
@@ -0,0 +1,92 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/BaseAndGeckoProfilerDetail.h"
+
+#include <limits>
+#include <string_view>
+
+namespace mozilla::profiler::detail {
+
+constexpr std::string_view scPidPrefix = "pid:";
+
+// Convert a C string to a BaseProfilerProcessId. Return unspecified
+// BaseProfilerProcessId if the string is not exactly a valid pid.
+static baseprofiler::BaseProfilerProcessId StringToPid(const char* aString) {
+  if (!aString || aString[0] == '\0') {
+    // Null or empty.
+    return baseprofiler::BaseProfilerProcessId{};
+  }
+
+  if (aString[0] == '0') {
+    if (aString[1] != '\0') {
+      // Don't accept leading zeroes.
+      return baseprofiler::BaseProfilerProcessId{};
+    }
+    return baseprofiler::BaseProfilerProcessId::FromNumber(0);
+  }
+
+  using PidNumber = baseprofiler::BaseProfilerProcessId::NumberType;
+  PidNumber pid = 0;
+  for (;;) {
+    const char c = *aString;
+    if (c == '\0') {
+      break;
+    }
+    if (c < '0' || c > '9') {
+      // Only accept decimal digits.
+      return baseprofiler::BaseProfilerProcessId{};
+    }
+    static_assert(!std::numeric_limits<PidNumber>::is_signed,
+                  "The following relies on unsigned arithmetic");
+    PidNumber newPid = pid * 10u + PidNumber(c - '0');
+    if (newPid < pid) {
+      // Unsigned overflow.
+      return baseprofiler::BaseProfilerProcessId{};
+    }
+    pid = newPid;
+    ++aString;
+  }
+  return baseprofiler::BaseProfilerProcessId::FromNumber(pid);
+}
+
+[[nodiscard]] MFBT_API bool FilterHasPid(
+    const char* aFilter, baseprofiler::BaseProfilerProcessId aPid) {
+  if (strncmp(aFilter, scPidPrefix.data(), scPidPrefix.length()) != 0) {
+    // The filter is not starting with "pid:".
+    return false;
+  }
+
+  return StringToPid(aFilter + scPidPrefix.length()) == aPid;
+}
+
+[[nodiscard]] MFBT_API bool FiltersExcludePid(
+    Span<const char* const> aFilters,
+    baseprofiler::BaseProfilerProcessId aPid) {
+  if (aFilters.empty()) {
+    return false;
+  }
+
+  // First, check if the list only contains "pid:..." strings.
+  for (const char* const filter : aFilters) {
+    if (strncmp(filter, scPidPrefix.data(), scPidPrefix.length()) != 0) {
+      // At least one filter is *not* a "pid:...", our pid is not excluded.
+      return false;
+    }
+  }
+
+  // Here, all filters start with "pid:". Check if the given pid is included.
+  for (const char* const filter : aFilters) {
+    if (StringToPid(filter + scPidPrefix.length()) == aPid) {
+      // Our pid is present, so it's not excluded.
+      return false;
+    }
+  }
+  // Our pid was not in a list of only pids, so it's excluded.
+  return true;
+}
+
+}  // namespace mozilla::profiler::detail
diff --git a/mozglue/baseprofiler/core/EHABIStackWalk.cpp b/mozglue/baseprofiler/core/EHABIStackWalk.cpp
new file mode 100644
index 0000000000..0c2c855c9b
--- /dev/null
+++ b/mozglue/baseprofiler/core/EHABIStackWalk.cpp
@@ -0,0 +1,592 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * This is an implementation of stack unwinding according to a subset
+ * of the ARM Exception Handling ABI, as described in:
+ *   http://infocenter.arm.com/help/topic/com.arm.doc.ihi0038a/IHI0038A_ehabi.pdf
+ *
+ * This handles only the ARM-defined "personality routines" (chapter
+ * 9), and don't track the value of FP registers, because profiling
+ * needs only chain of PC/SP values.
+ *
+ * Because the exception handling info may not be accurate for all
+ * possible places where an async signal could occur (e.g., in a
+ * prologue or epilogue), this bounds-checks all stack accesses.
+ *
+ * This file uses "struct" for structures in the exception tables and
+ * "class" otherwise.  We should avoid violating the C++11
+ * standard-layout rules in the former.
+ */
+
+#include "BaseProfiler.h"
+
+#include "EHABIStackWalk.h"
+
+#include "BaseProfilerSharedLibraries.h"
+#include "platform.h"
+
+#include "mozilla/Atomics.h"
+#include "mozilla/DebugOnly.h"
+#include "mozilla/EndianUtils.h"
+
+#include <algorithm>
+#include <elf.h>
+#include <stdint.h>
+#include <vector>
+#include <string>
+
+#ifndef PT_ARM_EXIDX
+#  define PT_ARM_EXIDX 0x70000001
+#endif
+
+namespace mozilla {
+namespace baseprofiler {
+
+struct PRel31 {
+  uint32_t mBits;
+  bool topBit() const { return mBits & 0x80000000; }
+  uint32_t value() const { return mBits & 0x7fffffff; }
+  int32_t offset() const { return (static_cast<int32_t>(mBits) << 1) >> 1; }
+  const void* compute() const {
+    return reinterpret_cast<const char*>(this) + offset();
+  }
+
+ private:
+  PRel31(const PRel31& copied) = delete;
+  PRel31() = delete;
+};
+
+struct EHEntry {
+  PRel31 startPC;
+  PRel31 exidx;
+
+ private:
+  EHEntry(const EHEntry& copied) = delete;
+  EHEntry() = delete;
+};
+
+class EHState {
+  // Note that any core register can be used as a "frame pointer" to
+  // influence the unwinding process, so this must track all of them.
+  uint32_t mRegs[16];
+
+ public:
+  bool unwind(const EHEntry* aEntry, const void* stackBase);
+  uint32_t& operator[](int i) { return mRegs[i]; }
+  const uint32_t& operator[](int i) const { return mRegs[i]; }
+  explicit EHState(const mcontext_t&);
+};
+
+enum { R_SP = 13, R_LR = 14, R_PC = 15 };
+
+class EHTable {
+  uint32_t mStartPC;
+  uint32_t mEndPC;
+  uint32_t mBaseAddress;
+  const EHEntry* mEntriesBegin;
+  const EHEntry* mEntriesEnd;
+  std::string mName;
+
+ public:
+  EHTable(const void* aELF, size_t aSize, const std::string& aName);
+  const EHEntry* lookup(uint32_t aPC) const;
+  bool isValid() const { return mEntriesEnd != mEntriesBegin; }
+  const std::string& name() const { return mName; }
+  uint32_t startPC() const { return mStartPC; }
+  uint32_t endPC() const { return mEndPC; }
+  uint32_t baseAddress() const { return mBaseAddress; }
+};
+
+class EHAddrSpace {
+  std::vector<uint32_t> mStarts;
+  std::vector<EHTable> mTables;
+  static Atomic<const EHAddrSpace*> sCurrent;
+
+ public:
+  explicit EHAddrSpace(const std::vector<EHTable>& aTables);
+  const EHTable* lookup(uint32_t aPC) const;
+  static void Update();
+  static const EHAddrSpace* Get();
+};
+
+void EHABIStackWalkInit() { EHAddrSpace::Update(); }
+
+size_t EHABIStackWalk(const mcontext_t& aContext, void* stackBase, void** aSPs,
+                      void** aPCs, const size_t aNumFrames) {
+  const EHAddrSpace* space = EHAddrSpace::Get();
+  EHState state(aContext);
+  size_t count = 0;
+
+  while (count < aNumFrames) {
+    uint32_t pc = state[R_PC], sp = state[R_SP];
+    aPCs[count] = reinterpret_cast<void*>(pc);
+    aSPs[count] = reinterpret_cast<void*>(sp);
+    count++;
+
+    if (!space) break;
+    // TODO: cache these lookups.  Binary-searching libxul is
+    // expensive (possibly more expensive than doing the actual
+    // unwind), and even a small cache should help.
+    const EHTable* table = space->lookup(pc);
+    if (!table) break;
+    const EHEntry* entry = table->lookup(pc);
+    if (!entry) break;
+    if (!state.unwind(entry, stackBase)) break;
+  }
+
+  return count;
+}
+
+class EHInterp {
+ public:
+  // Note that stackLimit is exclusive and stackBase is inclusive
+  // (i.e, stackLimit < SP <= stackBase), following the convention
+  // set by the AAPCS spec.
+  EHInterp(EHState& aState, const EHEntry* aEntry, uint32_t aStackLimit,
+           uint32_t aStackBase)
+      : mState(aState),
+        mStackLimit(aStackLimit),
+        mStackBase(aStackBase),
+        mNextWord(0),
+        mWordsLeft(0),
+        mFailed(false) {
+    const PRel31& exidx = aEntry->exidx;
+    uint32_t firstWord;
+
+    if (exidx.mBits == 1) {  // EXIDX_CANTUNWIND
+      mFailed = true;
+      return;
+    }
+    if (exidx.topBit()) {
+      firstWord = exidx.mBits;
+    } else {
+      mNextWord = reinterpret_cast<const uint32_t*>(exidx.compute());
+      firstWord = *mNextWord++;
+    }
+
+    switch (firstWord >> 24) {
+      case 0x80:  // short
+        mWord = firstWord << 8;
+        mBytesLeft = 3;
+        break;
+      case 0x81:
+      case 0x82:  // long; catch descriptor size ignored
+        mWord = firstWord << 16;
+        mBytesLeft = 2;
+        mWordsLeft = (firstWord >> 16) & 0xff;
+        break;
+      default:
+        // unknown personality
+        mFailed = true;
+    }
+  }
+
+  bool unwind();
+
+ private:
+  // TODO: GCC has been observed not CSEing repeated reads of
+  // mState[R_SP] with writes to mFailed between them, suggesting that
+  // it hasn't determined that they can't alias and is thus missing
+  // optimization opportunities.  So, we may want to flatten EHState
+  // into this class; this may also make the code simpler.
+  EHState& mState;
+  uint32_t mStackLimit;
+  uint32_t mStackBase;
+  const uint32_t* mNextWord;
+  uint32_t mWord;
+  uint8_t mWordsLeft;
+  uint8_t mBytesLeft;
+  bool mFailed;
+
+  enum {
+    I_ADDSP = 0x00,  // 0sxxxxxx (subtract if s)
+    M_ADDSP = 0x80,
+    I_POPMASK = 0x80,  // 1000iiii iiiiiiii (if any i set)
+    M_POPMASK = 0xf0,
+    I_MOVSP = 0x90,  // 1001nnnn
+    M_MOVSP = 0xf0,
+    I_POPN = 0xa0,  // 1010lnnn
+    M_POPN = 0xf0,
+    I_FINISH = 0xb0,    // 10110000
+    I_POPLO = 0xb1,     // 10110001 0000iiii (if any i set)
+    I_ADDSPBIG = 0xb2,  // 10110010 uleb128
+    I_POPFDX = 0xb3,    // 10110011 sssscccc
+    I_POPFDX8 = 0xb8,   // 10111nnn
+    M_POPFDX8 = 0xf8,
+    // "Intel Wireless MMX" extensions omitted.
+    I_POPFDD = 0xc8,  // 1100100h sssscccc
+    M_POPFDD = 0xfe,
+    I_POPFDD8 = 0xd0,  // 11010nnn
+    M_POPFDD8 = 0xf8
+  };
+
+  uint8_t next() {
+    if (mBytesLeft == 0) {
+      if (mWordsLeft == 0) {
+        return I_FINISH;
+      }
+      mWordsLeft--;
+      mWord = *mNextWord++;
+      mBytesLeft = 4;
+    }
+    mBytesLeft--;
+    mWord = (mWord << 8) | (mWord >> 24);  // rotate
+    return mWord;
+  }
+
+  uint32_t& vSP() { return mState[R_SP]; }
+  uint32_t* ptrSP() { return reinterpret_cast<uint32_t*>(vSP()); }
+
+  void checkStackBase() {
+    if (vSP() > mStackBase) mFailed = true;
+  }
+  void checkStackLimit() {
+    if (vSP() <= mStackLimit) mFailed = true;
+  }
+  void checkStackAlign() {
+    if ((vSP() & 3) != 0) mFailed = true;
+  }
+  void checkStack() {
+    checkStackBase();
+    checkStackLimit();
+    checkStackAlign();
+  }
+
+  void popRange(uint8_t first, uint8_t last, uint16_t mask) {
+    bool hasSP = false;
+    uint32_t tmpSP;
+    if (mask == 0) mFailed = true;
+    for (uint8_t r = first; r <= last; ++r) {
+      if (mask & 1) {
+        if (r == R_SP) {
+          hasSP = true;
+          tmpSP = *ptrSP();
+        } else
+          mState[r] = *ptrSP();
+        vSP() += 4;
+        checkStackBase();
+        if (mFailed) return;
+      }
+      mask >>= 1;
+    }
+    if (hasSP) {
+      vSP() = tmpSP;
+      checkStack();
+    }
+  }
+};
+
+bool EHState::unwind(const EHEntry* aEntry, const void* stackBasePtr) {
+  // The unwinding program cannot set SP to less than the initial value.
+  uint32_t stackLimit = mRegs[R_SP] - 4;
+  uint32_t stackBase = reinterpret_cast<uint32_t>(stackBasePtr);
+  EHInterp interp(*this, aEntry, stackLimit, stackBase);
+  return interp.unwind();
+}
+
+bool EHInterp::unwind() {
+  mState[R_PC] = 0;
+  checkStack();
+  while (!mFailed) {
+    uint8_t insn = next();
+#if DEBUG_EHABI_UNWIND
+    LOG("unwind insn = %02x", (unsigned)insn);
+#endif
+    // Try to put the common cases first.
+
+    // 00xxxxxx: vsp = vsp + (xxxxxx << 2) + 4
+    // 01xxxxxx: vsp = vsp - (xxxxxx << 2) - 4
+    if ((insn & M_ADDSP) == I_ADDSP) {
+      uint32_t offset = ((insn & 0x3f) << 2) + 4;
+      if (insn & 0x40) {
+        vSP() -= offset;
+        checkStackLimit();
+      } else {
+        vSP() += offset;
+        checkStackBase();
+      }
+      continue;
+    }
+
+    // 10100nnn: Pop r4-r[4+nnn]
+    // 10101nnn: Pop r4-r[4+nnn], r14
+    if ((insn & M_POPN) == I_POPN) {
+      uint8_t n = (insn & 0x07) + 1;
+      bool lr = insn & 0x08;
+      uint32_t* ptr = ptrSP();
+      vSP() += (n + (lr ? 1 : 0)) * 4;
+      checkStackBase();
+      for (uint8_t r = 4; r < 4 + n; ++r) mState[r] = *ptr++;
+      if (lr) mState[R_LR] = *ptr++;
+      continue;
+    }
+
+    // 1011000: Finish
+    if (insn == I_FINISH) {
+      if (mState[R_PC] == 0) {
+        mState[R_PC] = mState[R_LR];
+        // Non-standard change (bug 916106): Prevent the caller from
+        // re-using LR.  Since the caller is by definition not a leaf
+        // routine, it will have to restore LR from somewhere to
+        // return to its own caller, so we can safely zero it here.
+        // This makes a difference only if an error in unwinding
+        // (e.g., caused by starting from within a prologue/epilogue)
+        // causes us to load a pointer to a leaf routine as LR; if we
+        // don't do something, we'll go into an infinite loop of
+        // "returning" to that same function.
+        mState[R_LR] = 0;
+      }
+      return true;
+    }
+
+    // 1001nnnn: Set vsp = r[nnnn]
+    if ((insn & M_MOVSP) == I_MOVSP) {
+      vSP() = mState[insn & 0x0f];
+      checkStack();
+      continue;
+    }
+
+    // 11001000 sssscccc: Pop VFP regs D[16+ssss]-D[16+ssss+cccc] (as FLDMFDD)
+    // 11001001 sssscccc: Pop VFP regs D[ssss]-D[ssss+cccc] (as FLDMFDD)
+    if ((insn & M_POPFDD) == I_POPFDD) {
+      uint8_t n = (next() & 0x0f) + 1;
+      // Note: if the 16+ssss+cccc > 31, the encoding is reserved.
+      // As the space is currently unused, we don't try to check.
+      vSP() += 8 * n;
+      checkStackBase();
+      continue;
+    }
+
+    // 11010nnn: Pop VFP regs D[8]-D[8+nnn] (as FLDMFDD)
+    if ((insn & M_POPFDD8) == I_POPFDD8) {
+      uint8_t n = (insn & 0x07) + 1;
+      vSP() += 8 * n;
+      checkStackBase();
+      continue;
+    }
+
+    // 10110010 uleb128: vsp = vsp + 0x204 + (uleb128 << 2)
+    if (insn == I_ADDSPBIG) {
+      uint32_t acc = 0;
+      uint8_t shift = 0;
+      uint8_t byte;
+      do {
+        if (shift >= 32) return false;
+        byte = next();
+        acc |= (byte & 0x7f) << shift;
+        shift += 7;
+      } while (byte & 0x80);
+      uint32_t offset = 0x204 + (acc << 2);
+      // The calculations above could have overflowed.
+      // But the one we care about is this:
+      if (vSP() + offset < vSP()) mFailed = true;
+      vSP() += offset;
+      // ...so that this is the only other check needed:
+      checkStackBase();
+      continue;
+    }
+
+    // 1000iiii iiiiiiii (i not all 0): Pop under masks {r15-r12}, {r11-r4}
+    if ((insn & M_POPMASK) == I_POPMASK) {
+      popRange(4, 15, ((insn & 0x0f) << 8) | next());
+      continue;
+    }
+
+    // 1011001 0000iiii (i not all 0): Pop under mask {r3-r0}
+    if (insn == I_POPLO) {
+      popRange(0, 3, next() & 0x0f);
+      continue;
+    }
+
+    // 10110011 sssscccc: Pop VFP regs D[ssss]-D[ssss+cccc] (as FLDMFDX)
+    if (insn == I_POPFDX) {
+      uint8_t n = (next() & 0x0f) + 1;
+      vSP() += 8 * n + 4;
+      checkStackBase();
+      continue;
+    }
+
+    // 10111nnn: Pop VFP regs D[8]-D[8+nnn] (as FLDMFDX)
+    if ((insn & M_POPFDX8) == I_POPFDX8) {
+      uint8_t n = (insn & 0x07) + 1;
+      vSP() += 8 * n + 4;
+      checkStackBase();
+      continue;
+    }
+
+    // unhandled instruction
+#ifdef DEBUG_EHABI_UNWIND
+    LOG("Unhandled EHABI instruction 0x%02x", insn);
+#endif
+    mFailed = true;
+  }
+  return false;
+}
+
+bool operator<(const EHTable& lhs, const EHTable& rhs) {
+  return lhs.startPC() < rhs.startPC();
+}
+
+// Async signal unsafe.
+EHAddrSpace::EHAddrSpace(const std::vector<EHTable>& aTables)
+    : mTables(aTables) {
+  std::sort(mTables.begin(), mTables.end());
+  DebugOnly<uint32_t> lastEnd = 0;
+  for (std::vector<EHTable>::iterator i = mTables.begin(); i != mTables.end();
+       ++i) {
+    MOZ_ASSERT(i->startPC() >= lastEnd);
+    mStarts.push_back(i->startPC());
+    lastEnd = i->endPC();
+  }
+}
+
+const EHTable* EHAddrSpace::lookup(uint32_t aPC) const {
+  ptrdiff_t i = (std::upper_bound(mStarts.begin(), mStarts.end(), aPC) -
+                 mStarts.begin()) -
+                1;
+
+  if (i < 0 || aPC >= mTables[i].endPC()) return 0;
+  return &mTables[i];
+}
+
+const EHEntry* EHTable::lookup(uint32_t aPC) const {
+  MOZ_ASSERT(aPC >= mStartPC);
+  if (aPC >= mEndPC) return nullptr;
+
+  const EHEntry* begin = mEntriesBegin;
+  const EHEntry* end = mEntriesEnd;
+  MOZ_ASSERT(begin < end);
+  if (aPC < reinterpret_cast<uint32_t>(begin->startPC.compute()))
+    return nullptr;
+
+  while (end - begin > 1) {
+#ifdef EHABI_UNWIND_MORE_ASSERTS
+    if ((end - 1)->startPC.compute() < begin->startPC.compute()) {
+      MOZ_CRASH("unsorted exidx");
+    }
+#endif
+    const EHEntry* mid = begin + (end - begin) / 2;
+    if (aPC < reinterpret_cast<uint32_t>(mid->startPC.compute()))
+      end = mid;
+    else
+      begin = mid;
+  }
+  return begin;
+}
+
+#if MOZ_LITTLE_ENDIAN()
+static const unsigned char hostEndian = ELFDATA2LSB;
+#elif MOZ_BIG_ENDIAN()
+static const unsigned char hostEndian = ELFDATA2MSB;
+#else
+#  error "No endian?"
+#endif
+
+// Async signal unsafe: std::vector::reserve, std::string copy ctor.
+EHTable::EHTable(const void* aELF, size_t aSize, const std::string& aName)
+    : mStartPC(~0),  // largest uint32_t
+      mEndPC(0),
+      mEntriesBegin(nullptr),
+      mEntriesEnd(nullptr),
+      mName(aName) {
+  const uint32_t fileHeaderAddr = reinterpret_cast<uint32_t>(aELF);
+
+  if (aSize < sizeof(Elf32_Ehdr)) return;
+
+  const Elf32_Ehdr& file = *(reinterpret_cast<Elf32_Ehdr*>(fileHeaderAddr));
+  if (memcmp(&file.e_ident[EI_MAG0], ELFMAG, SELFMAG) != 0 ||
+      file.e_ident[EI_CLASS] != ELFCLASS32 ||
+      file.e_ident[EI_DATA] != hostEndian ||
+      file.e_ident[EI_VERSION] != EV_CURRENT || file.e_machine != EM_ARM ||
+      file.e_version != EV_CURRENT)
+    // e_flags?
+    return;
+
+  MOZ_ASSERT(file.e_phoff + file.e_phnum * file.e_phentsize <= aSize);
+  const Elf32_Phdr *exidxHdr = 0, *zeroHdr = 0;
+  for (unsigned i = 0; i < file.e_phnum; ++i) {
+    const Elf32_Phdr& phdr = *(reinterpret_cast<Elf32_Phdr*>(
+        fileHeaderAddr + file.e_phoff + i * file.e_phentsize));
+    if (phdr.p_type == PT_ARM_EXIDX) {
+      exidxHdr = &phdr;
+    } else if (phdr.p_type == PT_LOAD) {
+      if (phdr.p_offset == 0) {
+        zeroHdr = &phdr;
+      }
+      if (phdr.p_flags & PF_X) {
+        mStartPC = std::min(mStartPC, phdr.p_vaddr);
+        mEndPC = std::max(mEndPC, phdr.p_vaddr + phdr.p_memsz);
+      }
+    }
+  }
+  if (!exidxHdr) return;
+  if (!zeroHdr) return;
+  mBaseAddress = fileHeaderAddr - zeroHdr->p_vaddr;
+  mStartPC += mBaseAddress;
+  mEndPC += mBaseAddress;
+  mEntriesBegin =
+      reinterpret_cast<const EHEntry*>(mBaseAddress + exidxHdr->p_vaddr);
+  mEntriesEnd = reinterpret_cast<const EHEntry*>(
+      mBaseAddress + exidxHdr->p_vaddr + exidxHdr->p_memsz);
+}
+
+Atomic<const EHAddrSpace*> EHAddrSpace::sCurrent(nullptr);
+
+// Async signal safe; can fail if Update() hasn't returned yet.
+const EHAddrSpace* EHAddrSpace::Get() { return sCurrent; }
+
+// Collect unwinding information from loaded objects.  Calls after the
+// first have no effect.  Async signal unsafe.
+void EHAddrSpace::Update() {
+  const EHAddrSpace* space = sCurrent;
+  if (space) return;
+
+  SharedLibraryInfo info = SharedLibraryInfo::GetInfoForSelf();
+  std::vector<EHTable> tables;
+
+  for (size_t i = 0; i < info.GetSize(); ++i) {
+    const SharedLibrary& lib = info.GetEntry(i);
+    // FIXME: This isn't correct if the start address isn't p_offset 0, because
+    // the start address will not point at the file header. But this is worked
+    // around by magic number checks in the EHTable constructor.
+    EHTable tab(reinterpret_cast<const void*>(lib.GetStart()),
+                lib.GetEnd() - lib.GetStart(), lib.GetDebugPath());
+    if (tab.isValid()) tables.push_back(tab);
+  }
+  space = new EHAddrSpace(tables);
+
+  if (!sCurrent.compareExchange(nullptr, space)) {
+    delete space;
+    space = sCurrent;
+  }
+}
+
+EHState::EHState(const mcontext_t& context) {
+#ifdef linux
+  mRegs[0] = context.arm_r0;
+  mRegs[1] = context.arm_r1;
+  mRegs[2] = context.arm_r2;
+  mRegs[3] = context.arm_r3;
+  mRegs[4] = context.arm_r4;
+  mRegs[5] = context.arm_r5;
+  mRegs[6] = context.arm_r6;
+  mRegs[7] = context.arm_r7;
+  mRegs[8] = context.arm_r8;
+  mRegs[9] = context.arm_r9;
+  mRegs[10] = context.arm_r10;
+  mRegs[11] = context.arm_fp;
+  mRegs[12] = context.arm_ip;
+  mRegs[13] = context.arm_sp;
+  mRegs[14] = context.arm_lr;
+  mRegs[15] = context.arm_pc;
+#else
+#  error "Unhandled OS for ARM EHABI unwinding"
+#endif
+}
+
+}  // namespace baseprofiler
+}  // namespace mozilla
diff --git a/mozglue/baseprofiler/core/EHABIStackWalk.h b/mozglue/baseprofiler/core/EHABIStackWalk.h
new file mode 100644
index 0000000000..d5f4edc0d7
--- /dev/null
+++ b/mozglue/baseprofiler/core/EHABIStackWalk.h
@@ -0,0 +1,30 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * This is an implementation of stack unwinding according to a subset
+ * of the ARM Exception Handling ABI; see the comment at the top of
+ * the .cpp file for details.
+ */
+
+#ifndef mozilla_EHABIStackWalk_h__
+#define mozilla_EHABIStackWalk_h__
+
+#include <stddef.h>
+#include <ucontext.h>
+
+namespace mozilla {
+namespace baseprofiler {
+
+void EHABIStackWalkInit();
+
+size_t EHABIStackWalk(const mcontext_t& aContext, void* stackBase, void** aSPs,
+                      void** aPCs, size_t aNumFrames);
+
+}  // namespace baseprofiler
+}  // namespace mozilla
+
+#endif
diff --git a/mozglue/baseprofiler/core/PageInformation.cpp b/mozglue/baseprofiler/core/PageInformation.cpp
new file mode 100644
index 0000000000..bb7c7872aa
--- /dev/null
+++ b/mozglue/baseprofiler/core/PageInformation.cpp
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "PageInformation.h"
+
+#include "BaseProfiler.h"
+
+#include "mozilla/BaseProfileJSONWriter.h"
+
+namespace mozilla {
+namespace baseprofiler {
+
+PageInformation::PageInformation(uint64_t aTabID, uint64_t aInnerWindowID,
+                                 const std::string& aUrl,
+                                 uint64_t aEmbedderInnerWindowID)
+    : mTabID(aTabID),
+      mInnerWindowID(aInnerWindowID),
+      mUrl(aUrl),
+      mEmbedderInnerWindowID(aEmbedderInnerWindowID),
+      mRefCnt(0) {}
+
+bool PageInformation::Equals(PageInformation* aOtherPageInfo) const {
+  // It's enough to check inner window IDs because they are unique for each
+  // page. Therefore, we don't have to check the tab ID or url.
+  return InnerWindowID() == aOtherPageInfo->InnerWindowID();
+}
+
+void PageInformation::StreamJSON(SpliceableJSONWriter& aWriter) const {
+  aWriter.StartObjectElement();
+  // Here, we are converting uint64_t to double. Both tab and Inner
+  // Window IDs are created using `nsContentUtils::GenerateProcessSpecificId`,
+  // which is specifically designed to only use 53 of the 64 bits to be lossless
+  // when passed into and out of JS as a double.
+  aWriter.DoubleProperty("tabID", TabID());
+  aWriter.DoubleProperty("innerWindowID", InnerWindowID());
+  aWriter.StringProperty("url", Url());
+  aWriter.DoubleProperty("embedderInnerWindowID", EmbedderInnerWindowID());
+  aWriter.EndObject();
+}
+
+size_t PageInformation::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
+  return aMallocSizeOf(this);
+}
+
+}  // namespace baseprofiler
+}  // namespace mozilla
diff --git a/mozglue/baseprofiler/core/PageInformation.h b/mozglue/baseprofiler/core/PageInformation.h
new file mode 100644
index 0000000000..41808877b3
--- /dev/null
+++ b/mozglue/baseprofiler/core/PageInformation.h
@@ -0,0 +1,77 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef PageInformation_h
+#define PageInformation_h
+
+#include "mozilla/Atomics.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/MemoryReporting.h"
+
+#include <string>
+
+namespace mozilla {
+namespace baseprofiler {
+
+class SpliceableJSONWriter;
+
+// This class contains information that's relevant to a single page only
+// while the page information is important and registered with the profiler,
+// but regardless of whether the profiler is running. All accesses to it are
+// protected by the profiler state lock.
+// When the page gets unregistered, we keep the profiler buffer position
+// to determine if we are still using this page. If not, we unregister
+// it in the next page registration.
+class PageInformation final {
+ public:
+  PageInformation(uint64_t aTabID, uint64_t aInnerWindowID,
+                  const std::string& aUrl, uint64_t aEmbedderInnerWindowID);
+
+  // Using hand-rolled ref-counting, because RefCounted.h macros don't produce
+  // the same code between mozglue and libxul, see bug 1536656.
+  MFBT_API void AddRef() const { ++mRefCnt; }
+  MFBT_API void Release() const {
+    MOZ_ASSERT(int32_t(mRefCnt) > 0);
+    if (--mRefCnt) {
+      delete this;
+    }
+  }
+
+  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const;
+  bool Equals(PageInformation* aOtherPageInfo) const;
+  void StreamJSON(SpliceableJSONWriter& aWriter) const;
+
+  uint64_t InnerWindowID() const { return mInnerWindowID; }
+  uint64_t TabID() const { return mTabID; }
+  const std::string& Url() const { return mUrl; }
+  uint64_t EmbedderInnerWindowID() const { return mEmbedderInnerWindowID; }
+
+  Maybe<uint64_t> BufferPositionWhenUnregistered() const {
+    return mBufferPositionWhenUnregistered;
+  }
+
+  void NotifyUnregistered(uint64_t aBufferPosition) {
+    mBufferPositionWhenUnregistered = Some(aBufferPosition);
+  }
+
+ private:
+  const uint64_t mTabID;
+  const uint64_t mInnerWindowID;
+  const std::string mUrl;
+  const uint64_t mEmbedderInnerWindowID;
+
+  // Holds the buffer position when page is unregistered.
+  // It's used to determine if we still use this page in the profiler or
+  // not.
+  Maybe<uint64_t> mBufferPositionWhenUnregistered;
+
+  mutable Atomic<int32_t, MemoryOrdering::ReleaseAcquire> mRefCnt;
+};
+
+}  // namespace baseprofiler
+}  // namespace mozilla
+
+#endif  // PageInformation_h
diff --git a/mozglue/baseprofiler/core/PlatformMacros.h b/mozglue/baseprofiler/core/PlatformMacros.h
new file mode 100644
index 0000000000..c72e94c128
--- /dev/null
+++ b/mozglue/baseprofiler/core/PlatformMacros.h
@@ -0,0 +1,130 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef PLATFORM_MACROS_H
+#define PLATFORM_MACROS_H
+
+// Define platform selection macros in a consistent way. Don't add anything
+// else to this file, so it can remain freestanding. The primary factorisation
+// is on (ARCH,OS) pairs ("PLATforms") but ARCH_ and OS_ macros are defined
+// too, since they are sometimes convenient.
+//
+// Note: "GP" is short for "Gecko Profiler".
+
+#undef GP_PLAT_x86_android
+#undef GP_PLAT_amd64_android
+#undef GP_PLAT_arm_android
+#undef GP_PLAT_arm64_android
+#undef GP_PLAT_x86_linux
+#undef GP_PLAT_amd64_linux
+#undef GP_PLAT_arm_linux
+#undef GP_PLAT_mips64_linux
+#undef GP_PLAT_amd64_darwin
+#undef GP_PLAT_arm64_darwin
+#undef GP_PLAT_x86_windows
+#undef GP_PLAT_amd64_windows
+#undef GP_PLAT_arm64_windows
+
+#undef GP_ARCH_x86
+#undef GP_ARCH_amd64
+#undef GP_ARCH_arm
+#undef GP_ARCH_arm64
+#undef GP_ARCH_mips64
+
+#undef GP_OS_android
+#undef GP_OS_linux
+#undef GP_OS_darwin
+#undef GP_OS_windows
+
+// We test __ANDROID__ before __linux__ because __linux__ is defined on both
+// Android and Linux, whereas GP_OS_android is not defined on vanilla Linux.
+
+#if defined(__ANDROID__) && defined(__i386__)
+#  define GP_PLAT_x86_android 1
+#  define GP_ARCH_x86 1
+#  define GP_OS_android 1
+
+#elif defined(__ANDROID__) && defined(__x86_64__)
+#  define GP_PLAT_amd64_android 1
+#  define GP_ARCH_amd64 1
+#  define GP_OS_android 1
+
+#elif defined(__ANDROID__) && defined(__arm__)
+#  define GP_PLAT_arm_android 1
+#  define GP_ARCH_arm 1
+#  define GP_OS_android 1
+
+#elif defined(__ANDROID__) && defined(__aarch64__)
+#  define GP_PLAT_arm64_android 1
+#  define GP_ARCH_arm64 1
+#  define GP_OS_android 1
+
+#elif defined(__linux__) && defined(__i386__)
+#  define GP_PLAT_x86_linux 1
+#  define GP_ARCH_x86 1
+#  define GP_OS_linux 1
+
+#elif defined(__linux__) && defined(__x86_64__)
+#  define GP_PLAT_amd64_linux 1
+#  define GP_ARCH_amd64 1
+#  define GP_OS_linux 1
+
+#elif defined(__linux__) && defined(__arm__)
+#  define GP_PLAT_arm_linux 1
+#  define GP_ARCH_arm 1
+#  define GP_OS_linux 1
+
+#elif defined(__linux__) && defined(__aarch64__)
+#  define GP_PLAT_arm64_linux 1
+#  define GP_ARCH_arm64 1
+#  define GP_OS_linux 1
+
+#elif defined(__linux__) && defined(__mips64)
+#  define GP_PLAT_mips64_linux 1
+#  define GP_ARCH_mips64 1
+#  define GP_OS_linux 1
+
+#elif defined(__APPLE__) && defined(__aarch64__)
+#  define GP_PLAT_arm64_darwin 1
+#  define GP_ARCH_arm64 1
+#  define GP_OS_darwin 1
+
+#elif defined(__APPLE__) && defined(__x86_64__)
+#  define GP_PLAT_amd64_darwin 1
+#  define GP_ARCH_amd64 1
+#  define GP_OS_darwin 1
+
+#elif defined(__FreeBSD__) && defined(__x86_64__)
+#  define GP_PLAT_amd64_freebsd 1
+#  define GP_ARCH_amd64 1
+#  define GP_OS_freebsd 1
+
+#elif defined(__FreeBSD__) && defined(__aarch64__)
+#  define GP_PLAT_arm64_freebsd 1
+#  define GP_ARCH_arm64 1
+#  define GP_OS_freebsd 1
+
+#elif (defined(_MSC_VER) || defined(__MINGW32__)) && \
+    (defined(_M_IX86) || defined(__i386__))
+#  define GP_PLAT_x86_windows 1
+#  define GP_ARCH_x86 1
+#  define GP_OS_windows 1
+
+#elif (defined(_MSC_VER) || defined(__MINGW32__)) && \
+    (defined(_M_X64) || defined(__x86_64__))
+#  define GP_PLAT_amd64_windows 1
+#  define GP_ARCH_amd64 1
+#  define GP_OS_windows 1
+
+#elif defined(_MSC_VER) && defined(_M_ARM64)
+#  define GP_PLAT_arm64_windows 1
+#  define GP_ARCH_arm64 1
+#  define GP_OS_windows 1
+
+#else
+#  error "Unsupported platform"
+#endif
+
+#endif /* ndef PLATFORM_MACROS_H */
diff --git a/mozglue/baseprofiler/core/ProfileBuffer.cpp b/mozglue/baseprofiler/core/ProfileBuffer.cpp
new file mode 100644
index 0000000000..dd5504274b
--- /dev/null
+++ b/mozglue/baseprofiler/core/ProfileBuffer.cpp
@@ -0,0 +1,217 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "ProfileBuffer.h"
+
+#include "mozilla/MathAlgorithms.h"
+
+#include "BaseProfiler.h"
+
+namespace mozilla {
+namespace baseprofiler {
+
+ProfileBuffer::ProfileBuffer(ProfileChunkedBuffer& aBuffer)
+    : mEntries(aBuffer) {
+  // Assume the given buffer is in-session.
+  MOZ_ASSERT(mEntries.IsInSession());
+}
+
+/* static */
+ProfileBufferBlockIndex ProfileBuffer::AddEntry(
+    ProfileChunkedBuffer& aProfileChunkedBuffer,
+    const ProfileBufferEntry& aEntry) {
+  switch (aEntry.GetKind()) {
+#define SWITCH_KIND(KIND, TYPE, SIZE)                          \
+  case ProfileBufferEntry::Kind::KIND: {                       \
+    return aProfileChunkedBuffer.PutFrom(&aEntry, 1 + (SIZE)); \
+    break;                                                     \
+  }
+
+    FOR_EACH_PROFILE_BUFFER_ENTRY_KIND(SWITCH_KIND)
+
+#undef SWITCH_KIND
+    default:
+      MOZ_ASSERT(false, "Unhandled baseprofiler::ProfilerBuffer entry KIND");
+      return ProfileBufferBlockIndex{};
+  }
+}
+
+// Called from signal, call only reentrant functions
+uint64_t ProfileBuffer::AddEntry(const ProfileBufferEntry& aEntry) {
+  return AddEntry(mEntries, aEntry).ConvertToProfileBufferIndex();
+}
+
+/* static */
+ProfileBufferBlockIndex ProfileBuffer::AddThreadIdEntry(
+    ProfileChunkedBuffer& aProfileChunkedBuffer,
+    BaseProfilerThreadId aThreadId) {
+  return AddEntry(aProfileChunkedBuffer,
+                  ProfileBufferEntry::ThreadId(aThreadId));
+}
+
+uint64_t ProfileBuffer::AddThreadIdEntry(BaseProfilerThreadId aThreadId) {
+  return AddThreadIdEntry(mEntries, aThreadId).ConvertToProfileBufferIndex();
+}
+
+void ProfileBuffer::CollectCodeLocation(
+    const char* aLabel, const char* aStr, uint32_t aFrameFlags,
+    uint64_t aInnerWindowID, const Maybe<uint32_t>& aLineNumber,
+    const Maybe<uint32_t>& aColumnNumber,
+    const Maybe<ProfilingCategoryPair>& aCategoryPair) {
+  AddEntry(ProfileBufferEntry::Label(aLabel));
+  AddEntry(ProfileBufferEntry::FrameFlags(uint64_t(aFrameFlags)));
+
+  if (aStr) {
+    // Store the string using one or more DynamicStringFragment entries.
+    size_t strLen = strlen(aStr) + 1;  // +1 for the null terminator
+    // If larger than the prescribed limit, we will cut the string and end it
+    // with an ellipsis.
+    const bool tooBig = strLen > kMaxFrameKeyLength;
+    if (tooBig) {
+      strLen = kMaxFrameKeyLength;
+    }
+    char chars[ProfileBufferEntry::kNumChars];
+    for (size_t j = 0;; j += ProfileBufferEntry::kNumChars) {
+      // Store up to kNumChars characters in the entry.
+      size_t len = ProfileBufferEntry::kNumChars;
+      const bool last = j + len >= strLen;
+      if (last) {
+        // Only the last entry may be smaller than kNumChars.
+        len = strLen - j;
+        if (tooBig) {
+          // That last entry is part of a too-big string, replace the end
+          // characters with an ellipsis "...".
+          len = std::max(len, size_t(4));
+          chars[len - 4] = '.';
+          chars[len - 3] = '.';
+          chars[len - 2] = '.';
+          chars[len - 1] = '\0';
+          // Make sure the memcpy will not overwrite our ellipsis!
+          len -= 4;
+        }
+      }
+      memcpy(chars, &aStr[j], len);
+      AddEntry(ProfileBufferEntry::DynamicStringFragment(chars));
+      if (last) {
+        break;
+      }
+    }
+  }
+
+  if (aInnerWindowID) {
+    AddEntry(ProfileBufferEntry::InnerWindowID(aInnerWindowID));
+  }
+
+  if (aLineNumber) {
+    AddEntry(ProfileBufferEntry::LineNumber(*aLineNumber));
+  }
+
+  if (aColumnNumber) {
+    AddEntry(ProfileBufferEntry::ColumnNumber(*aColumnNumber));
+  }
+
+  if (aCategoryPair.isSome()) {
+    AddEntry(ProfileBufferEntry::CategoryPair(int(*aCategoryPair)));
+  }
+}
+
+size_t ProfileBuffer::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const {
+  // Measurement of the following members may be added later if DMD finds it
+  // is worthwhile:
+  // - memory pointed to by the elements within mEntries
+  return mEntries.SizeOfExcludingThis(aMallocSizeOf);
+}
+
+size_t ProfileBuffer::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
+  return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
+}
+
+void ProfileBuffer::CollectOverheadStats(TimeDuration aSamplingTime,
+                                         TimeDuration aLocking,
+                                         TimeDuration aCleaning,
+                                         TimeDuration aCounters,
+                                         TimeDuration aThreads) {
+  double timeUs = aSamplingTime.ToMilliseconds() * 1000.0;
+  if (mFirstSamplingTimeUs == 0.0) {
+    mFirstSamplingTimeUs = timeUs;
+  } else {
+    // Note that we'll have 1 fewer interval than other numbers (because
+    // we need both ends of an interval to know its duration). The final
+    // difference should be insignificant over the expected many thousands
+    // of iterations.
+    mIntervalsUs.Count(timeUs - mLastSamplingTimeUs);
+  }
+  mLastSamplingTimeUs = timeUs;
+  // Time to take the lock before sampling.
+  double lockingUs = aLocking.ToMilliseconds() * 1000.0;
+  // Time to discard expired data.
+  double cleaningUs = aCleaning.ToMilliseconds() * 1000.0;
+  // Time to gather all counters.
+  double countersUs = aCounters.ToMilliseconds() * 1000.0;
+  // Time to sample all threads.
+  double threadsUs = aThreads.ToMilliseconds() * 1000.0;
+
+  // Add to our gathered stats.
+  mOverheadsUs.Count(lockingUs + cleaningUs + countersUs + threadsUs);
+  mLockingsUs.Count(lockingUs);
+  mCleaningsUs.Count(cleaningUs);
+  mCountersUs.Count(countersUs);
+  mThreadsUs.Count(threadsUs);
+
+  // Record details in buffer, if requested.
+  static const bool sRecordSamplingOverhead = []() {
+    const char* recordOverheads = getenv("MOZ_PROFILER_RECORD_OVERHEADS");
+    return recordOverheads && recordOverheads[0] != '\0';
+  }();
+  if (sRecordSamplingOverhead) {
+    AddEntry(ProfileBufferEntry::ProfilerOverheadTime(timeUs));
+    AddEntry(ProfileBufferEntry::ProfilerOverheadDuration(lockingUs));
+    AddEntry(ProfileBufferEntry::ProfilerOverheadDuration(cleaningUs));
+    AddEntry(ProfileBufferEntry::ProfilerOverheadDuration(countersUs));
+    AddEntry(ProfileBufferEntry::ProfilerOverheadDuration(threadsUs));
+  }
+}
+
+ProfilerBufferInfo ProfileBuffer::GetProfilerBufferInfo() const {
+  return {BufferRangeStart(),
+          BufferRangeEnd(),
+          static_cast<uint32_t>(*mEntries.BufferLength() /
+                                8),  // 8 bytes per entry.
+          mIntervalsUs,
+          mOverheadsUs,
+          mLockingsUs,
+          mCleaningsUs,
+          mCountersUs,
+          mThreadsUs};
+}
+
+/* ProfileBufferCollector */
+
+void ProfileBufferCollector::CollectNativeLeafAddr(void* aAddr) {
+  mBuf.AddEntry(ProfileBufferEntry::NativeLeafAddr(aAddr));
+}
+
+void ProfileBufferCollector::CollectProfilingStackFrame(
+    const ProfilingStackFrame& aFrame) {
+  // WARNING: this function runs within the profiler's "critical section".
+
+  MOZ_ASSERT(aFrame.isLabelFrame() ||
+             (aFrame.isJsFrame() && !aFrame.isOSRFrame()));
+
+  const char* label = aFrame.label();
+  const char* dynamicString = aFrame.dynamicString();
+  Maybe<uint32_t> line;
+  Maybe<uint32_t> column;
+
+  MOZ_ASSERT(aFrame.isLabelFrame());
+
+  mBuf.CollectCodeLocation(label, dynamicString, aFrame.flags(),
+                           aFrame.realmID(), line, column,
+                           Some(aFrame.categoryPair()));
+}
+
+}  // namespace baseprofiler
+}  // namespace mozilla
diff --git a/mozglue/baseprofiler/core/ProfileBuffer.h b/mozglue/baseprofiler/core/ProfileBuffer.h
new file mode 100644
index 0000000000..f77b429df8
--- /dev/null
+++ b/mozglue/baseprofiler/core/ProfileBuffer.h
@@ -0,0 +1,211 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MOZ_PROFILE_BUFFER_H
+#define MOZ_PROFILE_BUFFER_H
+
+#include "ProfileBufferEntry.h"
+
+#include "BaseProfiler.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/PowerOfTwo.h"
+#include "mozilla/ProfileBufferChunkManagerSingle.h"
+#include "mozilla/ProfileChunkedBuffer.h"
+
+namespace mozilla {
+namespace baseprofiler {
+
+// Class storing most profiling data in a ProfileChunkedBuffer.
+//
+// This class is used as a queue of entries which, after construction, never
+// allocates. This makes it safe to use in the profiler's "critical section".
+class ProfileBuffer final {
+ public:
+  // ProfileBuffer constructor
+  // @param aBuffer The in-session ProfileChunkedBuffer to use as buffer
+  // manager.
+  explicit ProfileBuffer(ProfileChunkedBuffer& aBuffer);
+
+  ProfileChunkedBuffer& UnderlyingChunkedBuffer() const { return mEntries; }
+
+  bool IsThreadSafe() const { return mEntries.IsThreadSafe(); }
+
+  // Add |aEntry| to the buffer, ignoring what kind of entry it is.
+  // Returns the position of the entry.
+  uint64_t AddEntry(const ProfileBufferEntry& aEntry);
+
+  // Add to the buffer a sample start (ThreadId) entry for aThreadId.
+  // Returns the position of the entry.
+  uint64_t AddThreadIdEntry(BaseProfilerThreadId aThreadId);
+
+  void CollectCodeLocation(const char* aLabel, const char* aStr,
+                           uint32_t aFrameFlags, uint64_t aInnerWindowID,
+                           const Maybe<uint32_t>& aLineNumber,
+                           const Maybe<uint32_t>& aColumnNumber,
+                           const Maybe<ProfilingCategoryPair>& aCategoryPair);
+
+  // Maximum size of a frameKey string that we'll handle.
+  static const size_t kMaxFrameKeyLength = 512;
+
+  // Stream JSON for samples in the buffer to aWriter, using the supplied
+  // UniqueStacks object.
+  // Only streams samples for the given thread ID and which were taken at or
+  // after aSinceTime. If ID is 0, ignore the stored thread ID; this should only
+  // be used when the buffer contains only one sample.
+  // Return the thread ID of the streamed sample(s), or 0.
+  BaseProfilerThreadId StreamSamplesToJSON(SpliceableJSONWriter& aWriter,
+                                           BaseProfilerThreadId aThreadId,
+                                           double aSinceTime,
+                                           UniqueStacks& aUniqueStacks) const;
+
+  void StreamMarkersToJSON(SpliceableJSONWriter& aWriter,
+                           BaseProfilerThreadId aThreadId,
+                           const TimeStamp& aProcessStartTime,
+                           double aSinceTime,
+                           UniqueStacks& aUniqueStacks) const;
+  void StreamPausedRangesToJSON(SpliceableJSONWriter& aWriter,
+                                double aSinceTime) const;
+  void StreamProfilerOverheadToJSON(SpliceableJSONWriter& aWriter,
+                                    const TimeStamp& aProcessStartTime,
+                                    double aSinceTime) const;
+  void StreamCountersToJSON(SpliceableJSONWriter& aWriter,
+                            const TimeStamp& aProcessStartTime,
+                            double aSinceTime) const;
+
+  // Find (via |aLastSample|) the most recent sample for the thread denoted by
+  // |aThreadId| and clone it, patching in the current time as appropriate.
+  // Mutate |aLastSample| to point to the newly inserted sample.
+  // Returns whether duplication was successful.
+  bool DuplicateLastSample(BaseProfilerThreadId aThreadId,
+                           const TimeStamp& aProcessStartTime,
+                           Maybe<uint64_t>& aLastSample);
+
+  void DiscardSamplesBeforeTime(double aTime);
+
+  size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const;
+  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const;
+
+  void CollectOverheadStats(TimeDuration aSamplingTime, TimeDuration aLocking,
+                            TimeDuration aCleaning, TimeDuration aCounters,
+                            TimeDuration aThreads);
+
+  ProfilerBufferInfo GetProfilerBufferInfo() const;
+
+ private:
+  // Add |aEntry| to the provider ProfileChunkedBuffer.
+  // `static` because it may be used to add an entry to a `ProfileChunkedBuffer`
+  // that is not attached to a `ProfileBuffer`.
+  static ProfileBufferBlockIndex AddEntry(
+      ProfileChunkedBuffer& aProfileChunkedBuffer,
+      const ProfileBufferEntry& aEntry);
+
+  // Add a sample start (ThreadId) entry for aThreadId to the provided
+  // ProfileChunkedBuffer. Returns the position of the entry.
+  // `static` because it may be used to add an entry to a `ProfileChunkedBuffer`
+  // that is not attached to a `ProfileBuffer`.
+  static ProfileBufferBlockIndex AddThreadIdEntry(
+      ProfileChunkedBuffer& aProfileChunkedBuffer,
+      BaseProfilerThreadId aThreadId);
+
+  // The storage in which this ProfileBuffer stores its entries.
+  ProfileChunkedBuffer& mEntries;
+
+ public:
+  // `BufferRangeStart()` and `BufferRangeEnd()` return `uint64_t` values
+  // corresponding to the first entry and past the last entry stored in
+  // `mEntries`.
+  //
+  // The returned values are not guaranteed to be stable, because other threads
+  // may also be accessing the buffer concurrently. But they will always
+  // increase, and can therefore give an indication of how far these values have
+  // *at least* reached. In particular:
+  // - Entries whose index is strictly less that `BufferRangeStart()` have been
+  //   discarded by now, so any related data may also be safely discarded.
+  // - It is safe to try and read entries at any index strictly less than
+  //   `BufferRangeEnd()` -- but note that these reads may fail by the time you
+  //   request them, as old entries get overwritten by new ones.
+  uint64_t BufferRangeStart() const { return mEntries.GetState().mRangeStart; }
+  uint64_t BufferRangeEnd() const { return mEntries.GetState().mRangeEnd; }
+
+ private:
+  // Single pre-allocated chunk (to avoid spurious mallocs), used when:
+  // - Duplicating sleeping stacks (hence scExpectedMaximumStackSize).
+  // - Adding JIT info.
+  // - Streaming stacks to JSON.
+  // Mutable because it's accessed from non-multithreaded const methods.
+  mutable Maybe<ProfileBufferChunkManagerSingle> mMaybeWorkerChunkManager;
+  ProfileBufferChunkManagerSingle& WorkerChunkManager() const {
+    if (mMaybeWorkerChunkManager.isNothing()) {
+      // Only actually allocate it on first use. (Some ProfileBuffers are
+      // temporary and don't actually need this.)
+      mMaybeWorkerChunkManager.emplace(
+          ProfileBufferChunk::SizeofChunkMetadata() +
+          ProfileBufferChunkManager::scExpectedMaximumStackSize);
+    }
+    return *mMaybeWorkerChunkManager;
+  }
+
+  // Time from launch (us) when first sampling was recorded.
+  double mFirstSamplingTimeUs = 0.0;
+  // Time from launch (us) when last sampling was recorded.
+  double mLastSamplingTimeUs = 0.0;
+  // Sampling stats: Interval (us) between successive samplings.
+  ProfilerStats mIntervalsUs;
+  // Sampling stats: Total duration (us) of each sampling. (Split detail below.)
+  ProfilerStats mOverheadsUs;
+  // Sampling stats: Time (us) to acquire the lock before sampling.
+  ProfilerStats mLockingsUs;
+  // Sampling stats: Time (us) to discard expired data.
+  ProfilerStats mCleaningsUs;
+  // Sampling stats: Time (us) to collect counter data.
+  ProfilerStats mCountersUs;
+  // Sampling stats: Time (us) to sample thread stacks.
+  ProfilerStats mThreadsUs;
+};
+
+/**
+ * Helper type used to implement ProfilerStackCollector. This type is used as
+ * the collector for MergeStacks by ProfileBuffer. It holds a reference to the
+ * buffer, as well as additional feature flags which are needed to control the
+ * data collection strategy
+ */
+class ProfileBufferCollector final : public ProfilerStackCollector {
+ public:
+  ProfileBufferCollector(ProfileBuffer& aBuf, uint64_t aSamplePos,
+                         uint64_t aBufferRangeStart)
+      : mBuf(aBuf),
+        mSamplePositionInBuffer(aSamplePos),
+        mBufferRangeStart(aBufferRangeStart) {
+    MOZ_ASSERT(
+        mSamplePositionInBuffer >= mBufferRangeStart,
+        "The sample position should always be after the buffer range start");
+  }
+
+  // Position at which the sample starts in the profiler buffer (which may be
+  // different from the buffer in which the sample data is collected here).
+  Maybe<uint64_t> SamplePositionInBuffer() override {
+    return Some(mSamplePositionInBuffer);
+  }
+
+  // Profiler buffer's range start (which may be different from the buffer in
+  // which the sample data is collected here).
+  Maybe<uint64_t> BufferRangeStart() override {
+    return Some(mBufferRangeStart);
+  }
+
+  virtual void CollectNativeLeafAddr(void* aAddr) override;
+  virtual void CollectProfilingStackFrame(
+      const ProfilingStackFrame& aFrame) override;
+
+ private:
+  ProfileBuffer& mBuf;
+  uint64_t mSamplePositionInBuffer;
+  uint64_t mBufferRangeStart;
+};
+
+}  // namespace baseprofiler
+}  // namespace mozilla
+
+#endif
diff --git a/mozglue/baseprofiler/core/ProfileBufferEntry.cpp b/mozglue/baseprofiler/core/ProfileBufferEntry.cpp
new file mode 100644
index 0000000000..ab30b52cee
--- /dev/null
+++ b/mozglue/baseprofiler/core/ProfileBufferEntry.cpp
@@ -0,0 +1,1341 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "ProfileBufferEntry.h"
+
+#include <ostream>
+#include <type_traits>
+
+#include "mozilla/Logging.h"
+#include "mozilla/ScopeExit.h"
+#include "mozilla/Sprintf.h"
+#include "mozilla/StackWalk.h"
+
+#include "BaseProfiler.h"
+#include "mozilla/BaseProfilerMarkers.h"
+#include "platform.h"
+#include "ProfileBuffer.h"
+#include "ProfilerBacktrace.h"
+
+namespace mozilla {
+namespace baseprofiler {
+
+////////////////////////////////////////////////////////////////////////
+// BEGIN ProfileBufferEntry
+
+ProfileBufferEntry::ProfileBufferEntry()
+    : mKind(Kind::INVALID), mStorage{0, 0, 0, 0, 0, 0, 0, 0} {}
+
+// aString must be a static string.
+ProfileBufferEntry::ProfileBufferEntry(Kind aKind, const char* aString)
+    : mKind(aKind) {
+  memcpy(mStorage, &aString, sizeof(aString));
+}
+
+ProfileBufferEntry::ProfileBufferEntry(Kind aKind, char aChars[kNumChars])
+    : mKind(aKind) {
+  memcpy(mStorage, aChars, kNumChars);
+}
+
+ProfileBufferEntry::ProfileBufferEntry(Kind aKind, void* aPtr) : mKind(aKind) {
+  memcpy(mStorage, &aPtr, sizeof(aPtr));
+}
+
+ProfileBufferEntry::ProfileBufferEntry(Kind aKind, double aDouble)
+    : mKind(aKind) {
+  memcpy(mStorage, &aDouble, sizeof(aDouble));
+}
+
+ProfileBufferEntry::ProfileBufferEntry(Kind aKind, int aInt) : mKind(aKind) {
+  memcpy(mStorage, &aInt, sizeof(aInt));
+}
+
+ProfileBufferEntry::ProfileBufferEntry(Kind aKind, int64_t aInt64)
+    : mKind(aKind) {
+  memcpy(mStorage, &aInt64, sizeof(aInt64));
+}
+
+ProfileBufferEntry::ProfileBufferEntry(Kind aKind, uint64_t aUint64)
+    : mKind(aKind) {
+  memcpy(mStorage, &aUint64, sizeof(aUint64));
+}
+
+ProfileBufferEntry::ProfileBufferEntry(Kind aKind,
+                                       BaseProfilerThreadId aThreadId)
+    : mKind(aKind) {
+  static_assert(std::is_trivially_copyable_v<BaseProfilerThreadId>);
+  static_assert(sizeof(aThreadId) <= sizeof(mStorage));
+  memcpy(mStorage, &aThreadId, sizeof(aThreadId));
+}
+
+const char* ProfileBufferEntry::GetString() const {
+  const char* result;
+  memcpy(&result, mStorage, sizeof(result));
+  return result;
+}
+
+void* ProfileBufferEntry::GetPtr() const {
+  void* result;
+  memcpy(&result, mStorage, sizeof(result));
+  return result;
+}
+
+double ProfileBufferEntry::GetDouble() const {
+  double result;
+  memcpy(&result, mStorage, sizeof(result));
+  return result;
+}
+
+int ProfileBufferEntry::GetInt() const {
+  int result;
+  memcpy(&result, mStorage, sizeof(result));
+  return result;
+}
+
+int64_t ProfileBufferEntry::GetInt64() const {
+  int64_t result;
+  memcpy(&result, mStorage, sizeof(result));
+  return result;
+}
+
+uint64_t ProfileBufferEntry::GetUint64() const {
+  uint64_t result;
+  memcpy(&result, mStorage, sizeof(result));
+  return result;
+}
+
+BaseProfilerThreadId ProfileBufferEntry::GetThreadId() const {
+  BaseProfilerThreadId result;
+  static_assert(std::is_trivially_copyable_v<BaseProfilerThreadId>);
+  memcpy(&result, mStorage, sizeof(result));
+  return result;
+}
+
+void ProfileBufferEntry::CopyCharsInto(char (&aOutArray)[kNumChars]) const {
+  memcpy(aOutArray, mStorage, kNumChars);
+}
+
+// END ProfileBufferEntry
+////////////////////////////////////////////////////////////////////////
+
+// As mentioned in ProfileBufferEntry.h, the JSON format contains many
+// arrays whose elements are laid out according to various schemas to help
+// de-duplication. This RAII class helps write these arrays by keeping track of
+// the last non-null element written and adding the appropriate number of null
+// elements when writing new non-null elements. It also automatically opens and
+// closes an array element on the given JSON writer.
+//
+// You grant the AutoArraySchemaWriter exclusive access to the JSONWriter and
+// the UniqueJSONStrings objects for the lifetime of AutoArraySchemaWriter. Do
+// not access them independently while the AutoArraySchemaWriter is alive.
+// If you need to add complex objects, call FreeFormElement(), which will give
+// you temporary access to the writer.
+//
+// Example usage:
+//
+//     // Define the schema of elements in this type of array: [FOO, BAR, BAZ]
+//     enum Schema : uint32_t {
+//       FOO = 0,
+//       BAR = 1,
+//       BAZ = 2
+//     };
+//
+//     AutoArraySchemaWriter writer(someJsonWriter, someUniqueStrings);
+//     if (shouldWriteFoo) {
+//       writer.IntElement(FOO, getFoo());
+//     }
+//     ... etc ...
+//
+//     The elements need to be added in-order.
+class MOZ_RAII AutoArraySchemaWriter {
+ public:
+  explicit AutoArraySchemaWriter(SpliceableJSONWriter& aWriter)
+      : mJSONWriter(aWriter), mNextFreeIndex(0) {
+    mJSONWriter.StartArrayElement();
+  }
+
+  ~AutoArraySchemaWriter() { mJSONWriter.EndArray(); }
+
+  template <typename T>
+  void IntElement(uint32_t aIndex, T aValue) {
+    static_assert(!std::is_same_v<T, uint64_t>,
+                  "Narrowing uint64 -> int64 conversion not allowed");
+    FillUpTo(aIndex);
+    mJSONWriter.IntElement(static_cast<int64_t>(aValue));
+  }
+
+  void DoubleElement(uint32_t aIndex, double aValue) {
+    FillUpTo(aIndex);
+    mJSONWriter.DoubleElement(aValue);
+  }
+
+  void TimeMsElement(uint32_t aIndex, double aTime_ms) {
+    FillUpTo(aIndex);
+    mJSONWriter.TimeDoubleMsElement(aTime_ms);
+  }
+
+  void BoolElement(uint32_t aIndex, bool aValue) {
+    FillUpTo(aIndex);
+    mJSONWriter.BoolElement(aValue);
+  }
+
+ protected:
+  SpliceableJSONWriter& Writer() { return mJSONWriter; }
+
+  void FillUpTo(uint32_t aIndex) {
+    MOZ_ASSERT(aIndex >= mNextFreeIndex);
+    mJSONWriter.NullElements(aIndex - mNextFreeIndex);
+    mNextFreeIndex = aIndex + 1;
+  }
+
+ private:
+  SpliceableJSONWriter& mJSONWriter;
+  uint32_t mNextFreeIndex;
+};
+
+// Same as AutoArraySchemaWriter, but this can also write strings (output as
+// indexes into the table of unique strings).
+class MOZ_RAII AutoArraySchemaWithStringsWriter : public AutoArraySchemaWriter {
+ public:
+  AutoArraySchemaWithStringsWriter(SpliceableJSONWriter& aWriter,
+                                   UniqueJSONStrings& aStrings)
+      : AutoArraySchemaWriter(aWriter), mStrings(aStrings) {}
+
+  void StringElement(uint32_t aIndex, const Span<const char>& aValue) {
+    FillUpTo(aIndex);
+    mStrings.WriteElement(Writer(), aValue);
+  }
+
+ private:
+  UniqueJSONStrings& mStrings;
+};
+
+UniqueStacks::StackKey UniqueStacks::BeginStack(const FrameKey& aFrame) {
+  return StackKey(GetOrAddFrameIndex(aFrame));
+}
+
+UniqueStacks::StackKey UniqueStacks::AppendFrame(const StackKey& aStack,
+                                                 const FrameKey& aFrame) {
+  return StackKey(aStack, GetOrAddStackIndex(aStack),
+                  GetOrAddFrameIndex(aFrame));
+}
+
+bool UniqueStacks::FrameKey::NormalFrameData::operator==(
+    const NormalFrameData& aOther) const {
+  return mLocation == aOther.mLocation &&
+         mRelevantForJS == aOther.mRelevantForJS &&
+         mInnerWindowID == aOther.mInnerWindowID && mLine == aOther.mLine &&
+         mColumn == aOther.mColumn && mCategoryPair == aOther.mCategoryPair;
+}
+
+UniqueStacks::UniqueStacks()
+    : mUniqueStrings(MakeUnique<UniqueJSONStrings>(
+          FailureLatchInfallibleSource::Singleton())),
+      mFrameTableWriter(FailureLatchInfallibleSource::Singleton()),
+      mStackTableWriter(FailureLatchInfallibleSource::Singleton()) {
+  mFrameTableWriter.StartBareList();
+  mStackTableWriter.StartBareList();
+}
+
+uint32_t UniqueStacks::GetOrAddStackIndex(const StackKey& aStack) {
+  uint32_t count = mStackToIndexMap.count();
+  auto entry = mStackToIndexMap.lookupForAdd(aStack);
+  if (entry) {
+    MOZ_ASSERT(entry->value() < count);
+    return entry->value();
+  }
+
+  MOZ_RELEASE_ASSERT(mStackToIndexMap.add(entry, aStack, count));
+  StreamStack(aStack);
+  return count;
+}
+
+uint32_t UniqueStacks::GetOrAddFrameIndex(const FrameKey& aFrame) {
+  uint32_t count = mFrameToIndexMap.count();
+  auto entry = mFrameToIndexMap.lookupForAdd(aFrame);
+  if (entry) {
+    MOZ_ASSERT(entry->value() < count);
+    return entry->value();
+  }
+
+  MOZ_RELEASE_ASSERT(mFrameToIndexMap.add(entry, aFrame, count));
+  StreamNonJITFrame(aFrame);
+  return count;
+}
+
+void UniqueStacks::SpliceFrameTableElements(SpliceableJSONWriter& aWriter) {
+  mFrameTableWriter.EndBareList();
+  aWriter.TakeAndSplice(mFrameTableWriter.TakeChunkedWriteFunc());
+}
+
+void UniqueStacks::SpliceStackTableElements(SpliceableJSONWriter& aWriter) {
+  mStackTableWriter.EndBareList();
+  aWriter.TakeAndSplice(mStackTableWriter.TakeChunkedWriteFunc());
+}
+
+void UniqueStacks::StreamStack(const StackKey& aStack) {
+  enum Schema : uint32_t { PREFIX = 0, FRAME = 1 };
+
+  AutoArraySchemaWriter writer(mStackTableWriter);
+  if (aStack.mPrefixStackIndex.isSome()) {
+    writer.IntElement(PREFIX, *aStack.mPrefixStackIndex);
+  }
+  writer.IntElement(FRAME, aStack.mFrameIndex);
+}
+
+void UniqueStacks::StreamNonJITFrame(const FrameKey& aFrame) {
+  using NormalFrameData = FrameKey::NormalFrameData;
+
+  enum Schema : uint32_t {
+    LOCATION = 0,
+    RELEVANT_FOR_JS = 1,
+    INNER_WINDOW_ID = 2,
+    IMPLEMENTATION = 3,
+    LINE = 4,
+    COLUMN = 5,
+    CATEGORY = 6,
+    SUBCATEGORY = 7
+  };
+
+  AutoArraySchemaWithStringsWriter writer(mFrameTableWriter, *mUniqueStrings);
+
+  const NormalFrameData& data = aFrame.mData.as<NormalFrameData>();
+  writer.StringElement(LOCATION, data.mLocation);
+  writer.BoolElement(RELEVANT_FOR_JS, data.mRelevantForJS);
+
+  // It's okay to convert uint64_t to double here because DOM always creates IDs
+  // that are convertible to double.
+  writer.DoubleElement(INNER_WINDOW_ID, data.mInnerWindowID);
+
+  if (data.mLine.isSome()) {
+    writer.IntElement(LINE, *data.mLine);
+  }
+  if (data.mColumn.isSome()) {
+    writer.IntElement(COLUMN, *data.mColumn);
+  }
+  if (data.mCategoryPair.isSome()) {
+    const ProfilingCategoryPairInfo& info =
+        GetProfilingCategoryPairInfo(*data.mCategoryPair);
+    writer.IntElement(CATEGORY, uint32_t(info.mCategory));
+    writer.IntElement(SUBCATEGORY, info.mSubcategoryIndex);
+  }
+}
+
+struct ProfileSample {
+  uint32_t mStack;
+  double mTime;
+  Maybe<double> mResponsiveness;
+};
+
+static void WriteSample(SpliceableJSONWriter& aWriter,
+                        const ProfileSample& aSample) {
+  enum Schema : uint32_t {
+    STACK = 0,
+    TIME = 1,
+    EVENT_DELAY = 2,
+  };
+
+  AutoArraySchemaWriter writer(aWriter);
+
+  writer.IntElement(STACK, aSample.mStack);
+
+  writer.TimeMsElement(TIME, aSample.mTime);
+
+  if (aSample.mResponsiveness.isSome()) {
+    writer.DoubleElement(EVENT_DELAY, *aSample.mResponsiveness);
+  }
+}
+
+class EntryGetter {
+ public:
+  explicit EntryGetter(ProfileChunkedBuffer::Reader& aReader,
+                       uint64_t aInitialReadPos = 0)
+      : mBlockIt(
+            aReader.At(ProfileBufferBlockIndex::CreateFromProfileBufferIndex(
+                aInitialReadPos))),
+        mBlockItEnd(aReader.end()) {
+    if (!ReadLegacyOrEnd()) {
+      // Find and read the next non-legacy entry.
+      Next();
+    }
+  }
+
+  bool Has() const { return mBlockIt != mBlockItEnd; }
+
+  const ProfileBufferEntry& Get() const {
+    MOZ_ASSERT(Has(), "Caller should have checked `Has()` before `Get()`");
+    return mEntry;
+  }
+
+  void Next() {
+    MOZ_ASSERT(Has(), "Caller should have checked `Has()` before `Next()`");
+    for (;;) {
+      ++mBlockIt;
+      if (ReadLegacyOrEnd()) {
+        // Either we're at the end, or we could read a legacy entry -> Done.
+        break;
+      }
+      // Otherwise loop around until we hit the end or a legacy entry.
+    }
+  }
+
+  ProfileBufferBlockIndex CurBlockIndex() const {
+    return mBlockIt.CurrentBlockIndex();
+  }
+
+  uint64_t CurPos() const {
+    return CurBlockIndex().ConvertToProfileBufferIndex();
+  }
+
+ private:
+  // Try to read the entry at the current `mBlockIt` position.
+  // * If we're at the end of the buffer, just return `true`.
+  // * If there is a "legacy" entry (containing a real `ProfileBufferEntry`),
+  //   read it into `mEntry`, and return `true` as well.
+  // * Otherwise the entry contains a "modern" type that cannot be read into
+  // `mEntry`, return `false` (so `EntryGetter` can skip to another entry).
+  bool ReadLegacyOrEnd() {
+    if (!Has()) {
+      return true;
+    }
+    // Read the entry "kind", which is always at the start of all entries.
+    ProfileBufferEntryReader aER = *mBlockIt;
+    auto type = static_cast<ProfileBufferEntry::Kind>(
+        aER.ReadObject<ProfileBufferEntry::KindUnderlyingType>());
+    MOZ_ASSERT(static_cast<ProfileBufferEntry::KindUnderlyingType>(type) <
+               static_cast<ProfileBufferEntry::KindUnderlyingType>(
+                   ProfileBufferEntry::Kind::MODERN_LIMIT));
+    if (type >= ProfileBufferEntry::Kind::LEGACY_LIMIT) {
+      aER.SetRemainingBytes(0);
+      return false;
+    }
+    // Here, we have a legacy item, we need to read it from the start.
+    // Because the above `ReadObject` moved the reader, we ned to reset it to
+    // the start of the entry before reading the whole entry.
+    aER = *mBlockIt;
+    aER.ReadBytes(&mEntry, aER.RemainingBytes());
+    return true;
+  }
+
+  ProfileBufferEntry mEntry;
+  ProfileChunkedBuffer::BlockIterator mBlockIt;
+  const ProfileChunkedBuffer::BlockIterator mBlockItEnd;
+};
+
+// The following grammar shows legal sequences of profile buffer entries.
+// The sequences beginning with a ThreadId entry are known as "samples".
+//
+// (
+//   ( /* Samples */
+//     ThreadId
+//     Time
+//     ( NativeLeafAddr
+//     | Label FrameFlags? DynamicStringFragment* LineNumber? CategoryPair?
+//     | JitReturnAddr
+//     )+
+//     Responsiveness?
+//   )
+//   | MarkerData
+//   | ( /* Counters */
+//       CounterId
+//       Time
+//       (
+//         CounterKey
+//         Count
+//         Number?
+//       )*
+//     )
+//   | CollectionStart
+//   | CollectionEnd
+//   | Pause
+//   | Resume
+//   | ( ProfilerOverheadTime /* Sampling start timestamp */
+//       ProfilerOverheadDuration /* Lock acquisition */
+//       ProfilerOverheadDuration /* Expired data cleaning */
+//       ProfilerOverheadDuration /* Counters */
+//       ProfilerOverheadDuration /* Threads */
+//     )
+// )*
+//
+// The most complicated part is the stack entry sequence that begins with
+// Label. Here are some examples.
+//
+// - ProfilingStack frames without a dynamic string:
+//
+//     Label("js::RunScript")
+//     CategoryPair(ProfilingCategoryPair::JS)
+//
+//     Label("XREMain::XRE_main")
+//     LineNumber(4660)
+//     CategoryPair(ProfilingCategoryPair::OTHER)
+//
+//     Label("ElementRestyler::ComputeStyleChangeFor")
+//     LineNumber(3003)
+//     CategoryPair(ProfilingCategoryPair::CSS)
+//
+// - ProfilingStack frames with a dynamic string:
+//
+//     Label("nsObserverService::NotifyObservers")
+//     FrameFlags(uint64_t(ProfilingStackFrame::Flags::IS_LABEL_FRAME))
+//     DynamicStringFragment("domwindo")
+//     DynamicStringFragment("wopened")
+//     LineNumber(291)
+//     CategoryPair(ProfilingCategoryPair::OTHER)
+//
+//     Label("")
+//     FrameFlags(uint64_t(ProfilingStackFrame::Flags::IS_JS_FRAME))
+//     DynamicStringFragment("closeWin")
+//     DynamicStringFragment("dow (chr")
+//     DynamicStringFragment("ome://gl")
+//     DynamicStringFragment("obal/con")
+//     DynamicStringFragment("tent/glo")
+//     DynamicStringFragment("balOverl")
+//     DynamicStringFragment("ay.js:5)")
+//     DynamicStringFragment("")          # this string holds the closing '\0'
+//     LineNumber(25)
+//     CategoryPair(ProfilingCategoryPair::JS)
+//
+//     Label("")
+//     FrameFlags(uint64_t(ProfilingStackFrame::Flags::IS_JS_FRAME))
+//     DynamicStringFragment("bound (s")
+//     DynamicStringFragment("elf-host")
+//     DynamicStringFragment("ed:914)")
+//     LineNumber(945)
+//     CategoryPair(ProfilingCategoryPair::JS)
+//
+// - A profiling stack frame with an overly long dynamic string:
+//
+//     Label("")
+//     FrameFlags(uint64_t(ProfilingStackFrame::Flags::IS_LABEL_FRAME))
+//     DynamicStringFragment("(too lon")
+//     DynamicStringFragment("g)")
+//     LineNumber(100)
+//     CategoryPair(ProfilingCategoryPair::NETWORK)
+//
+// - A wasm JIT frame:
+//
+//     Label("")
+//     FrameFlags(uint64_t(0))
+//     DynamicStringFragment("wasm-fun")
+//     DynamicStringFragment("ction[87")
+//     DynamicStringFragment("36] (blo")
+//     DynamicStringFragment("b:http:/")
+//     DynamicStringFragment("/webasse")
+//     DynamicStringFragment("mbly.org")
+//     DynamicStringFragment("/3dc5759")
+//     DynamicStringFragment("4-ce58-4")
+//     DynamicStringFragment("626-975b")
+//     DynamicStringFragment("-08ad116")
+//     DynamicStringFragment("30bc1:38")
+//     DynamicStringFragment("29856)")
+//
+// - A JS frame in a synchronous sample:
+//
+//     Label("")
+//     FrameFlags(uint64_t(ProfilingStackFrame::Flags::IS_LABEL_FRAME))
+//     DynamicStringFragment("u (https")
+//     DynamicStringFragment("://perf-")
+//     DynamicStringFragment("html.io/")
+//     DynamicStringFragment("ac0da204")
+//     DynamicStringFragment("aaa44d75")
+//     DynamicStringFragment("a800.bun")
+//     DynamicStringFragment("dle.js:2")
+//     DynamicStringFragment("5)")
+
+// Because this is a format entirely internal to the Profiler, any parsing
+// error indicates a bug in the ProfileBuffer writing or the parser itself,
+// or possibly flaky hardware.
+#define ERROR_AND_CONTINUE(msg)                            \
+  {                                                        \
+    fprintf(stderr, "ProfileBuffer parse error: %s", msg); \
+    MOZ_ASSERT(false, msg);                                \
+    continue;                                              \
+  }
+
+BaseProfilerThreadId ProfileBuffer::StreamSamplesToJSON(
+    SpliceableJSONWriter& aWriter, BaseProfilerThreadId aThreadId,
+    double aSinceTime, UniqueStacks& aUniqueStacks) const {
+  UniquePtr<char[]> dynStrBuf = MakeUnique<char[]>(kMaxFrameKeyLength);
+
+  return mEntries.Read([&](ProfileChunkedBuffer::Reader* aReader) {
+    MOZ_ASSERT(aReader,
+               "ProfileChunkedBuffer cannot be out-of-session when sampler is "
+               "running");
+
+    BaseProfilerThreadId processedThreadId;
+
+    EntryGetter e(*aReader);
+
+    for (;;) {
+      // This block skips entries until we find the start of the next sample.
+      // This is useful in three situations.
+      //
+      // - The circular buffer overwrites old entries, so when we start parsing
+      //   we might be in the middle of a sample, and we must skip forward to
+      //   the start of the next sample.
+      //
+      // - We skip samples that don't have an appropriate ThreadId or Time.
+      //
+      // - We skip range Pause, Resume, CollectionStart, Counter and
+      //   CollectionEnd entries between samples.
+      while (e.Has()) {
+        if (e.Get().IsThreadId()) {
+          break;
+        }
+        e.Next();
+      }
+
+      if (!e.Has()) {
+        break;
+      }
+
+      // Due to the skip_to_next_sample block above, if we have an entry here it
+      // must be a ThreadId entry.
+      MOZ_ASSERT(e.Get().IsThreadId());
+
+      BaseProfilerThreadId threadId = e.Get().GetThreadId();
+      e.Next();
+
+      // Ignore samples that are for the wrong thread.
+      if (threadId != aThreadId && aThreadId.IsSpecified()) {
+        continue;
+      }
+
+      MOZ_ASSERT(
+          aThreadId.IsSpecified() || !processedThreadId.IsSpecified(),
+          "Unspecified aThreadId should only be used with 1-sample buffer");
+
+      ProfileSample sample;
+
+      if (e.Has() && e.Get().IsTime()) {
+        sample.mTime = e.Get().GetDouble();
+        e.Next();
+
+        // Ignore samples that are too old.
+        if (sample.mTime < aSinceTime) {
+          continue;
+        }
+      } else {
+        ERROR_AND_CONTINUE("expected a Time entry");
+      }
+
+      UniqueStacks::StackKey stack =
+          aUniqueStacks.BeginStack(UniqueStacks::FrameKey("(root)"));
+
+      int numFrames = 0;
+      while (e.Has()) {
+        if (e.Get().IsNativeLeafAddr()) {
+          numFrames++;
+
+          void* pc = e.Get().GetPtr();
+          e.Next();
+
+          static const uint32_t BUF_SIZE = 256;
+          char buf[BUF_SIZE];
+
+          // Bug 753041: We need a double cast here to tell GCC that we don't
+          // want to sign extend 32-bit addresses starting with 0xFXXXXXX.
+          unsigned long long pcULL = (unsigned long long)(uintptr_t)pc;
+          SprintfLiteral(buf, "0x%llx", pcULL);
+
+          // If the "MOZ_PROFILER_SYMBOLICATE" env-var is set, we add a local
+          // symbolication description to the PC address. This is off by
+          // default, and mainly intended for local development.
+          static const bool preSymbolicate = []() {
+            const char* symbolicate = getenv("MOZ_PROFILER_SYMBOLICATE");
+            return symbolicate && symbolicate[0] != '\0';
+          }();
+          if (preSymbolicate) {
+            MozCodeAddressDetails details;
+            if (MozDescribeCodeAddress(pc, &details)) {
+              // Replace \0 terminator with space.
+              const uint32_t pcLen = strlen(buf);
+              buf[pcLen] = ' ';
+              // Add description after space. Note: Using a frame number of 0,
+              // as using `numFrames` wouldn't help here, and would prevent
+              // combining same function calls that happen at different depths.
+              // TODO: Remove unsightly "#00: " if too annoying. :-)
+              MozFormatCodeAddressDetails(
+                  buf + pcLen + 1, BUF_SIZE - (pcLen + 1), 0, pc, &details);
+            }
+          }
+
+          stack = aUniqueStacks.AppendFrame(stack, UniqueStacks::FrameKey(buf));
+
+        } else if (e.Get().IsLabel()) {
+          numFrames++;
+
+          const char* label = e.Get().GetString();
+          e.Next();
+
+          using FrameFlags = ProfilingStackFrame::Flags;
+          uint32_t frameFlags = 0;
+          if (e.Has() && e.Get().IsFrameFlags()) {
+            frameFlags = uint32_t(e.Get().GetUint64());
+            e.Next();
+          }
+
+          bool relevantForJS =
+              frameFlags & uint32_t(FrameFlags::RELEVANT_FOR_JS);
+
+          // Copy potential dynamic string fragments into dynStrBuf, so that
+          // dynStrBuf will then contain the entire dynamic string.
+          size_t i = 0;
+          dynStrBuf[0] = '\0';
+          while (e.Has()) {
+            if (e.Get().IsDynamicStringFragment()) {
+              char chars[ProfileBufferEntry::kNumChars];
+              e.Get().CopyCharsInto(chars);
+              for (char c : chars) {
+                if (i < kMaxFrameKeyLength) {
+                  dynStrBuf[i] = c;
+                  i++;
+                }
+              }
+              e.Next();
+            } else {
+              break;
+            }
+          }
+          dynStrBuf[kMaxFrameKeyLength - 1] = '\0';
+          bool hasDynamicString = (i != 0);
+
+          std::string frameLabel;
+          if (label[0] != '\0' && hasDynamicString) {
+            if (frameFlags & uint32_t(FrameFlags::STRING_TEMPLATE_METHOD)) {
+              frameLabel += label;
+              frameLabel += '.';
+              frameLabel += dynStrBuf.get();
+            } else if (frameFlags &
+                       uint32_t(FrameFlags::STRING_TEMPLATE_GETTER)) {
+              frameLabel += "get ";
+              frameLabel += label;
+              frameLabel += '.';
+              frameLabel += dynStrBuf.get();
+            } else if (frameFlags &
+                       uint32_t(FrameFlags::STRING_TEMPLATE_SETTER)) {
+              frameLabel += "set ";
+              frameLabel += label;
+              frameLabel += '.';
+              frameLabel += dynStrBuf.get();
+            } else {
+              frameLabel += label;
+              frameLabel += ' ';
+              frameLabel += dynStrBuf.get();
+            }
+          } else if (hasDynamicString) {
+            frameLabel += dynStrBuf.get();
+          } else {
+            frameLabel += label;
+          }
+
+          uint64_t innerWindowID = 0;
+          if (e.Has() && e.Get().IsInnerWindowID()) {
+            innerWindowID = uint64_t(e.Get().GetUint64());
+            e.Next();
+          }
+
+          Maybe<unsigned> line;
+          if (e.Has() && e.Get().IsLineNumber()) {
+            line = Some(unsigned(e.Get().GetInt()));
+            e.Next();
+          }
+
+          Maybe<unsigned> column;
+          if (e.Has() && e.Get().IsColumnNumber()) {
+            column = Some(unsigned(e.Get().GetInt()));
+            e.Next();
+          }
+
+          Maybe<ProfilingCategoryPair> categoryPair;
+          if (e.Has() && e.Get().IsCategoryPair()) {
+            categoryPair =
+                Some(ProfilingCategoryPair(uint32_t(e.Get().GetInt())));
+            e.Next();
+          }
+
+          stack = aUniqueStacks.AppendFrame(
+              stack, UniqueStacks::FrameKey(std::move(frameLabel),
+                                            relevantForJS, innerWindowID, line,
+                                            column, categoryPair));
+
+        } else {
+          break;
+        }
+      }
+
+      if (numFrames == 0) {
+        // It is possible to have empty stacks if native stackwalking is
+        // disabled. Skip samples with empty stacks. (See Bug 1497985).
+        // Thus, don't use ERROR_AND_CONTINUE, but just continue.
+        continue;
+      }
+
+      sample.mStack = aUniqueStacks.GetOrAddStackIndex(stack);
+
+      if (e.Has() && e.Get().IsResponsiveness()) {
+        sample.mResponsiveness = Some(e.Get().GetDouble());
+        e.Next();
+      }
+
+      WriteSample(aWriter, sample);
+
+      processedThreadId = threadId;
+    }
+
+    return processedThreadId;
+  });
+}
+
+void ProfileBuffer::StreamMarkersToJSON(SpliceableJSONWriter& aWriter,
+                                        BaseProfilerThreadId aThreadId,
+                                        const TimeStamp& aProcessStartTime,
+                                        double aSinceTime,
+                                        UniqueStacks& aUniqueStacks) const {
+  mEntries.ReadEach([&](ProfileBufferEntryReader& aER) {
+    auto type = static_cast<ProfileBufferEntry::Kind>(
+        aER.ReadObject<ProfileBufferEntry::KindUnderlyingType>());
+    MOZ_ASSERT(static_cast<ProfileBufferEntry::KindUnderlyingType>(type) <
+               static_cast<ProfileBufferEntry::KindUnderlyingType>(
+                   ProfileBufferEntry::Kind::MODERN_LIMIT));
+    if (type == ProfileBufferEntry::Kind::Marker) {
+      ::mozilla::base_profiler_markers_detail::DeserializeAfterKindAndStream(
+          aER,
+          [&](const BaseProfilerThreadId& aMarkerThreadId) {
+            return (aMarkerThreadId == aThreadId) ? &aWriter : nullptr;
+          },
+          [&](ProfileChunkedBuffer& aChunkedBuffer) {
+            ProfilerBacktrace backtrace("", &aChunkedBuffer);
+            backtrace.StreamJSON(aWriter, TimeStamp::ProcessCreation(),
+                                 aUniqueStacks);
+          },
+          // We don't have Rust markers in the mozglue.
+          [&](mozilla::base_profiler_markers_detail::Streaming::
+                  DeserializerTag) {
+            MOZ_ASSERT_UNREACHABLE("No Rust markers in mozglue.");
+          });
+    } else {
+      // The entry was not a marker, we need to skip to the end.
+      aER.SetRemainingBytes(0);
+    }
+  });
+}
+
+void ProfileBuffer::StreamProfilerOverheadToJSON(
+    SpliceableJSONWriter& aWriter, const TimeStamp& aProcessStartTime,
+    double aSinceTime) const {
+  mEntries.Read([&](ProfileChunkedBuffer::Reader* aReader) {
+    MOZ_ASSERT(aReader,
+               "ProfileChunkedBuffer cannot be out-of-session when sampler is "
+               "running");
+
+    EntryGetter e(*aReader);
+
+    enum Schema : uint32_t {
+      TIME = 0,
+      LOCKING = 1,
+      MARKER_CLEANING = 2,
+      COUNTERS = 3,
+      THREADS = 4
+    };
+
+    aWriter.StartObjectProperty("profilerOverhead");
+    aWriter.StartObjectProperty("samples");
+    // Stream all sampling overhead data. We skip other entries, because we
+    // process them in StreamSamplesToJSON()/etc.
+    {
+      JSONSchemaWriter schema(aWriter);
+      schema.WriteField("time");
+      schema.WriteField("locking");
+      schema.WriteField("expiredMarkerCleaning");
+      schema.WriteField("counters");
+      schema.WriteField("threads");
+    }
+
+    aWriter.StartArrayProperty("data");
+    double firstTime = 0.0;
+    double lastTime = 0.0;
+    ProfilerStats intervals, overheads, lockings, cleanings, counters, threads;
+    while (e.Has()) {
+      // valid sequence: ProfilerOverheadTime, ProfilerOverheadDuration * 4
+      if (e.Get().IsProfilerOverheadTime()) {
+        double time = e.Get().GetDouble();
+        if (time >= aSinceTime) {
+          e.Next();
+          if (!e.Has() || !e.Get().IsProfilerOverheadDuration()) {
+            ERROR_AND_CONTINUE(
+                "expected a ProfilerOverheadDuration entry after "
+                "ProfilerOverheadTime");
+          }
+          double locking = e.Get().GetDouble();
+          e.Next();
+          if (!e.Has() || !e.Get().IsProfilerOverheadDuration()) {
+            ERROR_AND_CONTINUE(
+                "expected a ProfilerOverheadDuration entry after "
+                "ProfilerOverheadTime,ProfilerOverheadDuration");
+          }
+          double cleaning = e.Get().GetDouble();
+          e.Next();
+          if (!e.Has() || !e.Get().IsProfilerOverheadDuration()) {
+            ERROR_AND_CONTINUE(
+                "expected a ProfilerOverheadDuration entry after "
+                "ProfilerOverheadTime,ProfilerOverheadDuration*2");
+          }
+          double counter = e.Get().GetDouble();
+          e.Next();
+          if (!e.Has() || !e.Get().IsProfilerOverheadDuration()) {
+            ERROR_AND_CONTINUE(
+                "expected a ProfilerOverheadDuration entry after "
+                "ProfilerOverheadTime,ProfilerOverheadDuration*3");
+          }
+          double thread = e.Get().GetDouble();
+
+          if (firstTime == 0.0) {
+            firstTime = time;
+          } else {
+            // Note that we'll have 1 fewer interval than other numbers (because
+            // we need both ends of an interval to know its duration). The final
+            // difference should be insignificant over the expected many
+            // thousands of iterations.
+            intervals.Count(time - lastTime);
+          }
+          lastTime = time;
+          overheads.Count(locking + cleaning + counter + thread);
+          lockings.Count(locking);
+          cleanings.Count(cleaning);
+          counters.Count(counter);
+          threads.Count(thread);
+
+          AutoArraySchemaWriter writer(aWriter);
+          writer.TimeMsElement(TIME, time);
+          writer.DoubleElement(LOCKING, locking);
+          writer.DoubleElement(MARKER_CLEANING, cleaning);
+          writer.DoubleElement(COUNTERS, counter);
+          writer.DoubleElement(THREADS, thread);
+        }
+      }
+      e.Next();
+    }
+    aWriter.EndArray();   // data
+    aWriter.EndObject();  // samples
+
+    // Only output statistics if there is at least one full interval (and
+    // therefore at least two samplings.)
+    if (intervals.n > 0) {
+      aWriter.StartObjectProperty("statistics");
+      aWriter.DoubleProperty("profiledDuration", lastTime - firstTime);
+      aWriter.IntProperty("samplingCount", overheads.n);
+      aWriter.DoubleProperty("overheadDurations", overheads.sum);
+      aWriter.DoubleProperty("overheadPercentage",
+                             overheads.sum / (lastTime - firstTime));
+#define PROFILER_STATS(name, var)                           \
+  aWriter.DoubleProperty("mean" name, (var).sum / (var).n); \
+  aWriter.DoubleProperty("min" name, (var).min);            \
+  aWriter.DoubleProperty("max" name, (var).max);
+      PROFILER_STATS("Interval", intervals);
+      PROFILER_STATS("Overhead", overheads);
+      PROFILER_STATS("Lockings", lockings);
+      PROFILER_STATS("Cleaning", cleanings);
+      PROFILER_STATS("Counter", counters);
+      PROFILER_STATS("Thread", threads);
+#undef PROFILER_STATS
+      aWriter.EndObject();  // statistics
+    }
+    aWriter.EndObject();  // profilerOverhead
+  });
+}
+
+struct CounterSample {
+  double mTime;
+  uint64_t mNumber;
+  int64_t mCount;
+};
+
+using CounterSamples = Vector<CounterSample>;
+
+// HashMap lookup, if not found, a default value is inserted.
+// Returns reference to (existing or new) value inside the HashMap.
+template <typename HashM, typename Key>
+static auto& LookupOrAdd(HashM& aMap, Key&& aKey) {
+  auto addPtr = aMap.lookupForAdd(aKey);
+  if (!addPtr) {
+    MOZ_RELEASE_ASSERT(aMap.add(addPtr, std::forward<Key>(aKey),
+                                typename HashM::Entry::ValueType{}));
+    MOZ_ASSERT(!!addPtr);
+  }
+  return addPtr->value();
+}
+
+void ProfileBuffer::StreamCountersToJSON(SpliceableJSONWriter& aWriter,
+                                         const TimeStamp& aProcessStartTime,
+                                         double aSinceTime) const {
+  // Because this is a format entirely internal to the Profiler, any parsing
+  // error indicates a bug in the ProfileBuffer writing or the parser itself,
+  // or possibly flaky hardware.
+
+  mEntries.Read([&](ProfileChunkedBuffer::Reader* aReader) {
+    MOZ_ASSERT(aReader,
+               "ProfileChunkedBuffer cannot be out-of-session when sampler is "
+               "running");
+
+    EntryGetter e(*aReader);
+
+    enum Schema : uint32_t { TIME = 0, COUNT = 1, NUMBER = 2 };
+
+    // Stream all counters. We skip other entries, because we process them in
+    // StreamSamplesToJSON()/etc.
+    //
+    // Valid sequence in the buffer:
+    // CounterID
+    // Time
+    // ( Count Number? )*
+    //
+    // And the JSON (example):
+    // "counters": {
+    //  "name": "malloc",
+    //  "category": "Memory",
+    //  "description": "Amount of allocated memory",
+    //  "samples": {
+    //   "schema": {"time": 0, "count": 1, "number": 2},
+    //   "data": [
+    //    [
+    //     16117.033968000002,
+    //     2446216,
+    //     6801320
+    //    ],
+    //    [
+    //     16118.037638,
+    //     2446216,
+    //     6801320
+    //    ],
+    //   ],
+    //  },
+    // }
+
+    // Build the map of counters and populate it
+    HashMap<void*, CounterSamples> counters;
+
+    while (e.Has()) {
+      // skip all non-Counters, including if we start in the middle of a counter
+      if (e.Get().IsCounterId()) {
+        void* id = e.Get().GetPtr();
+        CounterSamples& data = LookupOrAdd(counters, id);
+        e.Next();
+        if (!e.Has() || !e.Get().IsTime()) {
+          ERROR_AND_CONTINUE("expected a Time entry");
+        }
+        double time = e.Get().GetDouble();
+        e.Next();
+        if (time >= aSinceTime) {
+          if (!e.Has() || !e.Get().IsCount()) {
+            ERROR_AND_CONTINUE("expected a Count entry");
+          }
+          int64_t count = e.Get().GetUint64();
+          e.Next();
+          uint64_t number;
+          if (!e.Has() || !e.Get().IsNumber()) {
+            number = 0;
+          } else {
+            number = e.Get().GetInt64();
+            e.Next();
+          }
+          CounterSample sample = {time, number, count};
+          MOZ_RELEASE_ASSERT(data.append(sample));
+        } else {
+          // skip counter sample - only need to skip the initial counter
+          // id, then let the loop at the top skip the rest
+        }
+      } else {
+        e.Next();
+      }
+    }
+    // we have a map of counter entries; dump them to JSON
+    if (counters.count() == 0) {
+      return;
+    }
+
+    aWriter.StartArrayProperty("counters");
+    for (auto iter = counters.iter(); !iter.done(); iter.next()) {
+      CounterSamples& samples = iter.get().value();
+      size_t size = samples.length();
+      if (size == 0) {
+        continue;
+      }
+      const BaseProfilerCount* base_counter =
+          static_cast<const BaseProfilerCount*>(iter.get().key());
+
+      aWriter.Start();
+      aWriter.StringProperty("name", MakeStringSpan(base_counter->mLabel));
+      aWriter.StringProperty("category",
+                             MakeStringSpan(base_counter->mCategory));
+      aWriter.StringProperty("description",
+                             MakeStringSpan(base_counter->mDescription));
+
+      bool hasNumber = false;
+      for (size_t i = 0; i < size; i++) {
+        if (samples[i].mNumber != 0) {
+          hasNumber = true;
+          break;
+        }
+      }
+
+      aWriter.StartObjectProperty("samples");
+      {
+        JSONSchemaWriter schema(aWriter);
+        schema.WriteField("time");
+        schema.WriteField("count");
+        if (hasNumber) {
+          schema.WriteField("number");
+        }
+      }
+
+      aWriter.StartArrayProperty("data");
+      uint64_t previousNumber = 0;
+      int64_t previousCount = 0;
+      for (size_t i = 0; i < size; i++) {
+        // Encode as deltas, and only encode if different than the last
+        // sample
+        if (i == 0 || samples[i].mNumber != previousNumber ||
+            samples[i].mCount != previousCount) {
+          MOZ_ASSERT(i == 0 || samples[i].mTime >= samples[i - 1].mTime);
+          MOZ_ASSERT(samples[i].mNumber >= previousNumber);
+          MOZ_ASSERT(samples[i].mNumber - previousNumber <=
+                     uint64_t(std::numeric_limits<int64_t>::max()));
+
+          AutoArraySchemaWriter writer(aWriter);
+          writer.TimeMsElement(TIME, samples[i].mTime);
+          writer.IntElement(COUNT, samples[i].mCount - previousCount);
+          if (hasNumber) {
+            writer.IntElement(NUMBER, static_cast<int64_t>(samples[i].mNumber -
+                                                           previousNumber));
+          }
+          previousNumber = samples[i].mNumber;
+          previousCount = samples[i].mCount;
+        }
+      }
+      aWriter.EndArray();   // data
+      aWriter.EndObject();  // samples
+      aWriter.End();        // for each counter
+    }
+    aWriter.EndArray();  // counters
+  });
+}
+
+#undef ERROR_AND_CONTINUE
+
+static void AddPausedRange(SpliceableJSONWriter& aWriter, const char* aReason,
+                           const Maybe<double>& aStartTime,
+                           const Maybe<double>& aEndTime) {
+  aWriter.Start();
+  if (aStartTime) {
+    aWriter.TimeDoubleMsProperty("startTime", *aStartTime);
+  } else {
+    aWriter.NullProperty("startTime");
+  }
+  if (aEndTime) {
+    aWriter.TimeDoubleMsProperty("endTime", *aEndTime);
+  } else {
+    aWriter.NullProperty("endTime");
+  }
+  aWriter.StringProperty("reason", MakeStringSpan(aReason));
+  aWriter.End();
+}
+
+void ProfileBuffer::StreamPausedRangesToJSON(SpliceableJSONWriter& aWriter,
+                                             double aSinceTime) const {
+  mEntries.Read([&](ProfileChunkedBuffer::Reader* aReader) {
+    MOZ_ASSERT(aReader,
+               "ProfileChunkedBuffer cannot be out-of-session when sampler is "
+               "running");
+
+    EntryGetter e(*aReader);
+
+    Maybe<double> currentPauseStartTime;
+    Maybe<double> currentCollectionStartTime;
+
+    while (e.Has()) {
+      if (e.Get().IsPause()) {
+        currentPauseStartTime = Some(e.Get().GetDouble());
+      } else if (e.Get().IsResume()) {
+        AddPausedRange(aWriter, "profiler-paused", currentPauseStartTime,
+                       Some(e.Get().GetDouble()));
+        currentPauseStartTime = Nothing();
+      } else if (e.Get().IsCollectionStart()) {
+        currentCollectionStartTime = Some(e.Get().GetDouble());
+      } else if (e.Get().IsCollectionEnd()) {
+        AddPausedRange(aWriter, "collecting", currentCollectionStartTime,
+                       Some(e.Get().GetDouble()));
+        currentCollectionStartTime = Nothing();
+      }
+      e.Next();
+    }
+
+    if (currentPauseStartTime) {
+      AddPausedRange(aWriter, "profiler-paused", currentPauseStartTime,
+                     Nothing());
+    }
+    if (currentCollectionStartTime) {
+      AddPausedRange(aWriter, "collecting", currentCollectionStartTime,
+                     Nothing());
+    }
+  });
+}
+
+bool ProfileBuffer::DuplicateLastSample(BaseProfilerThreadId aThreadId,
+                                        const TimeStamp& aProcessStartTime,
+                                        Maybe<uint64_t>& aLastSample) {
+  if (!aLastSample) {
+    return false;
+  }
+
+  ProfileChunkedBuffer tempBuffer(
+      ProfileChunkedBuffer::ThreadSafety::WithoutMutex, WorkerChunkManager());
+
+  auto retrieveWorkerChunk = MakeScopeExit(
+      [&]() { WorkerChunkManager().Reset(tempBuffer.GetAllChunks()); });
+
+  const bool ok = mEntries.Read([&](ProfileChunkedBuffer::Reader* aReader) {
+    MOZ_ASSERT(aReader,
+               "ProfileChunkedBuffer cannot be out-of-session when sampler is "
+               "running");
+
+    EntryGetter e(*aReader, *aLastSample);
+
+    if (e.CurPos() != *aLastSample) {
+      // The last sample is no longer within the buffer range, so we cannot
+      // use it. Reset the stored buffer position to Nothing().
+      aLastSample.reset();
+      return false;
+    }
+
+    MOZ_RELEASE_ASSERT(e.Has() && e.Get().IsThreadId() &&
+                       e.Get().GetThreadId() == aThreadId);
+
+    e.Next();
+
+    // Go through the whole entry and duplicate it, until we find the next
+    // one.
+    while (e.Has()) {
+      switch (e.Get().GetKind()) {
+        case ProfileBufferEntry::Kind::Pause:
+        case ProfileBufferEntry::Kind::Resume:
+        case ProfileBufferEntry::Kind::PauseSampling:
+        case ProfileBufferEntry::Kind::ResumeSampling:
+        case ProfileBufferEntry::Kind::CollectionStart:
+        case ProfileBufferEntry::Kind::CollectionEnd:
+        case ProfileBufferEntry::Kind::ThreadId:
+          // We're done.
+          return true;
+        case ProfileBufferEntry::Kind::Time:
+          // Copy with new time
+          AddEntry(
+              tempBuffer,
+              ProfileBufferEntry::Time(
+                  (TimeStamp::Now() - aProcessStartTime).ToMilliseconds()));
+          break;
+        case ProfileBufferEntry::Kind::Number:
+        case ProfileBufferEntry::Kind::Count:
+        case ProfileBufferEntry::Kind::Responsiveness:
+          // Don't copy anything not part of a thread's stack sample
+          break;
+        case ProfileBufferEntry::Kind::CounterId:
+          // CounterId is normally followed by Time - if so, we'd like
+          // to skip it.  If we duplicate Time, it won't hurt anything, just
+          // waste buffer space (and this can happen if the CounterId has
+          // fallen off the end of the buffer, but Time (and Number/Count)
+          // are still in the buffer).
+          e.Next();
+          if (e.Has() && e.Get().GetKind() != ProfileBufferEntry::Kind::Time) {
+            // this would only happen if there was an invalid sequence
+            // in the buffer.  Don't skip it.
+            continue;
+          }
+          // we've skipped Time
+          break;
+        case ProfileBufferEntry::Kind::ProfilerOverheadTime:
+          // ProfilerOverheadTime is normally followed by
+          // ProfilerOverheadDuration*4 - if so, we'd like to skip it. Don't
+          // duplicate, as we are in the middle of a sampling and will soon
+          // capture its own overhead.
+          e.Next();
+          // A missing Time would only happen if there was an invalid
+          // sequence in the buffer. Don't skip unexpected entry.
+          if (e.Has() &&
+              e.Get().GetKind() !=
+                  ProfileBufferEntry::Kind::ProfilerOverheadDuration) {
+            continue;
+          }
+          e.Next();
+          if (e.Has() &&
+              e.Get().GetKind() !=
+                  ProfileBufferEntry::Kind::ProfilerOverheadDuration) {
+            continue;
+          }
+          e.Next();
+          if (e.Has() &&
+              e.Get().GetKind() !=
+                  ProfileBufferEntry::Kind::ProfilerOverheadDuration) {
+            continue;
+          }
+          e.Next();
+          if (e.Has() &&
+              e.Get().GetKind() !=
+                  ProfileBufferEntry::Kind::ProfilerOverheadDuration) {
+            continue;
+          }
+          // we've skipped ProfilerOverheadTime and
+          // ProfilerOverheadDuration*4.
+          break;
+        default: {
+          // Copy anything else we don't know about.
+          AddEntry(tempBuffer, e.Get());
+          break;
+        }
+      }
+      e.Next();
+    }
+    return true;
+  });
+
+  if (!ok) {
+    return false;
+  }
+
+  // If the buffer was big enough, there won't be any cleared blocks.
+  if (tempBuffer.GetState().mClearedBlockCount != 0) {
+    // No need to try to read stack again as it won't fit. Reset the stored
+    // buffer position to Nothing().
+    aLastSample.reset();
+    return false;
+  }
+
+  aLastSample = Some(AddThreadIdEntry(aThreadId));
+
+  tempBuffer.Read([&](ProfileChunkedBuffer::Reader* aReader) {
+    MOZ_ASSERT(aReader, "tempBuffer cannot be out-of-session");
+
+    EntryGetter e(*aReader);
+
+    while (e.Has()) {
+      AddEntry(e.Get());
+      e.Next();
+    }
+  });
+
+  return true;
+}
+
+void ProfileBuffer::DiscardSamplesBeforeTime(double aTime) {
+  // This function does nothing!
+  // The duration limit will be removed from Firefox, see bug 1632365.
+  Unused << aTime;
+}
+
+// END ProfileBuffer
+////////////////////////////////////////////////////////////////////////
+
+}  // namespace baseprofiler
+}  // namespace mozilla
diff --git a/mozglue/baseprofiler/core/ProfileBufferEntry.h b/mozglue/baseprofiler/core/ProfileBufferEntry.h
new file mode 100644
index 0000000000..ee6e401bd8
--- /dev/null
+++ b/mozglue/baseprofiler/core/ProfileBufferEntry.h
@@ -0,0 +1,364 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef ProfileBufferEntry_h
+#define ProfileBufferEntry_h
+
+#include "BaseProfilingCategory.h"
+#include "gtest/MozGtestFriend.h"
+#include "mozilla/BaseProfileJSONWriter.h"
+#include "mozilla/HashFunctions.h"
+#include "mozilla/HashTable.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/ProfileBufferEntryKinds.h"
+#include "mozilla/UniquePtr.h"
+#include "mozilla/Variant.h"
+#include "mozilla/Vector.h"
+
+#include <string>
+#include <type_traits>
+
+namespace mozilla {
+namespace baseprofiler {
+
+class ProfileBufferEntry {
+ public:
+  using KindUnderlyingType =
+      std::underlying_type_t<::mozilla::ProfileBufferEntryKind>;
+  using Kind = ::mozilla::ProfileBufferEntryKind;
+
+  ProfileBufferEntry();
+
+  static constexpr size_t kNumChars = ::mozilla::ProfileBufferEntryNumChars;
+
+ private:
+  // aString must be a static string.
+  ProfileBufferEntry(Kind aKind, const char* aString);
+  ProfileBufferEntry(Kind aKind, char aChars[kNumChars]);
+  ProfileBufferEntry(Kind aKind, void* aPtr);
+  ProfileBufferEntry(Kind aKind, double aDouble);
+  ProfileBufferEntry(Kind aKind, int64_t aInt64);
+  ProfileBufferEntry(Kind aKind, uint64_t aUint64);
+  ProfileBufferEntry(Kind aKind, int aInt);
+  ProfileBufferEntry(Kind aKind, BaseProfilerThreadId aThreadId);
+
+ public:
+#define CTOR(KIND, TYPE, SIZE)                   \
+  static ProfileBufferEntry KIND(TYPE aVal) {    \
+    return ProfileBufferEntry(Kind::KIND, aVal); \
+  }
+  FOR_EACH_PROFILE_BUFFER_ENTRY_KIND(CTOR)
+#undef CTOR
+
+  Kind GetKind() const { return mKind; }
+
+#define IS_KIND(KIND, TYPE, SIZE) \
+  bool Is##KIND() const { return mKind == Kind::KIND; }
+  FOR_EACH_PROFILE_BUFFER_ENTRY_KIND(IS_KIND)
+#undef IS_KIND
+
+ private:
+  FRIEND_TEST(ThreadProfile, InsertOneEntry);
+  FRIEND_TEST(ThreadProfile, InsertOneEntryWithTinyBuffer);
+  FRIEND_TEST(ThreadProfile, InsertEntriesNoWrap);
+  FRIEND_TEST(ThreadProfile, InsertEntriesWrap);
+  FRIEND_TEST(ThreadProfile, MemoryMeasure);
+  friend class ProfileBuffer;
+
+  Kind mKind;
+  uint8_t mStorage[kNumChars];
+
+  const char* GetString() const;
+  void* GetPtr() const;
+  double GetDouble() const;
+  int GetInt() const;
+  int64_t GetInt64() const;
+  uint64_t GetUint64() const;
+  BaseProfilerThreadId GetThreadId() const;
+  void CopyCharsInto(char (&aOutArray)[kNumChars]) const;
+};
+
+// Packed layout: 1 byte for the tag + 8 bytes for the value.
+static_assert(sizeof(ProfileBufferEntry) == 9, "bad ProfileBufferEntry size");
+
+class UniqueStacks {
+ public:
+  struct FrameKey {
+    explicit FrameKey(const char* aLocation)
+        : mData(NormalFrameData{std::string(aLocation), false, 0, Nothing(),
+                                Nothing()}) {}
+
+    FrameKey(std::string&& aLocation, bool aRelevantForJS,
+             uint64_t aInnerWindowID, const Maybe<unsigned>& aLine,
+             const Maybe<unsigned>& aColumn,
+             const Maybe<ProfilingCategoryPair>& aCategoryPair)
+        : mData(NormalFrameData{aLocation, aRelevantForJS, aInnerWindowID,
+                                aLine, aColumn, aCategoryPair}) {}
+
+    FrameKey(const FrameKey& aToCopy) = default;
+
+    uint32_t Hash() const;
+    bool operator==(const FrameKey& aOther) const {
+      return mData == aOther.mData;
+    }
+
+    struct NormalFrameData {
+      bool operator==(const NormalFrameData& aOther) const;
+
+      std::string mLocation;
+      bool mRelevantForJS;
+      uint64_t mInnerWindowID;
+      Maybe<unsigned> mLine;
+      Maybe<unsigned> mColumn;
+      Maybe<ProfilingCategoryPair> mCategoryPair;
+    };
+    Variant<NormalFrameData> mData;
+  };
+
+  struct FrameKeyHasher {
+    using Lookup = FrameKey;
+
+    static HashNumber hash(const FrameKey& aLookup) {
+      HashNumber hash = 0;
+      if (aLookup.mData.is<FrameKey::NormalFrameData>()) {
+        const FrameKey::NormalFrameData& data =
+            aLookup.mData.as<FrameKey::NormalFrameData>();
+        if (!data.mLocation.empty()) {
+          hash = AddToHash(hash, HashString(data.mLocation.c_str()));
+        }
+        hash = AddToHash(hash, data.mRelevantForJS);
+        hash = mozilla::AddToHash(hash, data.mInnerWindowID);
+        if (data.mLine.isSome()) {
+          hash = AddToHash(hash, *data.mLine);
+        }
+        if (data.mColumn.isSome()) {
+          hash = AddToHash(hash, *data.mColumn);
+        }
+        if (data.mCategoryPair.isSome()) {
+          hash = AddToHash(hash, static_cast<uint32_t>(*data.mCategoryPair));
+        }
+      }
+      return hash;
+    }
+
+    static bool match(const FrameKey& aKey, const FrameKey& aLookup) {
+      return aKey == aLookup;
+    }
+
+    static void rekey(FrameKey& aKey, const FrameKey& aNewKey) {
+      aKey = aNewKey;
+    }
+  };
+
+  struct StackKey {
+    Maybe<uint32_t> mPrefixStackIndex;
+    uint32_t mFrameIndex;
+
+    explicit StackKey(uint32_t aFrame)
+        : mFrameIndex(aFrame), mHash(HashGeneric(aFrame)) {}
+
+    StackKey(const StackKey& aPrefix, uint32_t aPrefixStackIndex,
+             uint32_t aFrame)
+        : mPrefixStackIndex(Some(aPrefixStackIndex)),
+          mFrameIndex(aFrame),
+          mHash(AddToHash(aPrefix.mHash, aFrame)) {}
+
+    HashNumber Hash() const { return mHash; }
+
+    bool operator==(const StackKey& aOther) const {
+      return mPrefixStackIndex == aOther.mPrefixStackIndex &&
+             mFrameIndex == aOther.mFrameIndex;
+    }
+
+   private:
+    HashNumber mHash;
+  };
+
+  struct StackKeyHasher {
+    using Lookup = StackKey;
+
+    static HashNumber hash(const StackKey& aLookup) { return aLookup.Hash(); }
+
+    static bool match(const StackKey& aKey, const StackKey& aLookup) {
+      return aKey == aLookup;
+    }
+
+    static void rekey(StackKey& aKey, const StackKey& aNewKey) {
+      aKey = aNewKey;
+    }
+  };
+
+  UniqueStacks();
+
+  // Return a StackKey for aFrame as the stack's root frame (no prefix).
+  [[nodiscard]] StackKey BeginStack(const FrameKey& aFrame);
+
+  // Return a new StackKey that is obtained by appending aFrame to aStack.
+  [[nodiscard]] StackKey AppendFrame(const StackKey& aStack,
+                                     const FrameKey& aFrame);
+
+  [[nodiscard]] uint32_t GetOrAddFrameIndex(const FrameKey& aFrame);
+  [[nodiscard]] uint32_t GetOrAddStackIndex(const StackKey& aStack);
+
+  void SpliceFrameTableElements(SpliceableJSONWriter& aWriter);
+  void SpliceStackTableElements(SpliceableJSONWriter& aWriter);
+
+  UniqueJSONStrings& UniqueStrings() {
+    MOZ_RELEASE_ASSERT(mUniqueStrings.get());
+    return *mUniqueStrings;
+  }
+
+ private:
+  void StreamNonJITFrame(const FrameKey& aFrame);
+  void StreamStack(const StackKey& aStack);
+
+  UniquePtr<UniqueJSONStrings> mUniqueStrings;
+
+  SpliceableChunkedJSONWriter mFrameTableWriter;
+  HashMap<FrameKey, uint32_t, FrameKeyHasher> mFrameToIndexMap;
+
+  SpliceableChunkedJSONWriter mStackTableWriter;
+  HashMap<StackKey, uint32_t, StackKeyHasher> mStackToIndexMap;
+};
+
+//
+// Thread profile JSON Format
+// --------------------------
+//
+// The profile contains much duplicate information. The output JSON of the
+// profile attempts to deduplicate strings, frames, and stack prefixes, to cut
+// down on size and to increase JSON streaming speed. Deduplicated values are
+// streamed as indices into their respective tables.
+//
+// Further, arrays of objects with the same set of properties (e.g., samples,
+// frames) are output as arrays according to a schema instead of an object
+// with property names. A property that is not present is represented in the
+// array as null or undefined.
+//
+// The format of the thread profile JSON is shown by the following example
+// with 1 sample and 1 marker:
+//
+// {
+//   "name": "Foo",
+//   "tid": 42,
+//   "samples":
+//   {
+//     "schema":
+//     {
+//       "stack": 0,          /* index into stackTable */
+//       "time": 1,           /* number */
+//       "eventDelay": 2, /* number */
+//     },
+//     "data":
+//     [
+//       [ 1, 0.0, 0.0 ]      /* { stack: 1, time: 0.0, eventDelay: 0.0 } */
+//     ]
+//   },
+//
+//   "markers":
+//   {
+//     "schema":
+//     {
+//       "name": 0,           /* index into stringTable */
+//       "time": 1,           /* number */
+//       "data": 2            /* arbitrary JSON */
+//     },
+//     "data":
+//     [
+//       [ 3, 0.1 ]           /* { name: 'example marker', time: 0.1 } */
+//     ]
+//   },
+//
+//   "stackTable":
+//   {
+//     "schema":
+//     {
+//       "prefix": 0,         /* index into stackTable */
+//       "frame": 1           /* index into frameTable */
+//     },
+//     "data":
+//     [
+//       [ null, 0 ],         /* (root) */
+//       [ 0,    1 ]          /* (root) > foo.js */
+//     ]
+//   },
+//
+//   "frameTable":
+//   {
+//     "schema":
+//     {
+//       "location": 0,       /* index into stringTable */
+//       "relevantForJS": 1,  /* bool */
+//       "innerWindowID": 2,  /* inner window ID of global JS `window` object */
+//       "implementation": 3, /* index into stringTable */
+//       "line": 4,           /* number */
+//       "column": 5,         /* number */
+//       "category": 6,       /* index into profile.meta.categories */
+//       "subcategory": 7     /* index into
+//       profile.meta.categories[category].subcategories */
+//     },
+//     "data":
+//     [
+//       [ 0 ],               /* { location: '(root)' } */
+//       [ 1, 2 ]             /* { location: 'foo.js',
+//                                 implementation: 'baseline' } */
+//     ]
+//   },
+//
+//   "stringTable":
+//   [
+//     "(root)",
+//     "foo.js",
+//     "baseline",
+//     "example marker"
+//   ]
+// }
+//
+// Process:
+// {
+//   "name": "Bar",
+//   "pid": 24,
+//   "threads":
+//   [
+//     <0-N threads from above>
+//   ],
+//   "counters": /* includes the memory counter */
+//   [
+//     {
+//       "name": "qwerty",
+//       "category": "uiop",
+//       "description": "this is qwerty uiop",
+//       "sample_groups:
+//       [
+//         {
+//           "id": 42, /* number (thread id, or object identifier (tab), etc) */
+//           "samples:
+//           {
+//             "schema":
+//             {
+//               "time": 1,   /* number */
+//               "number": 2, /* number (of times the counter was touched) */
+//               "count": 3   /* number (total for the counter) */
+//             },
+//             "data":
+//             [
+//               [ 0.1, 1824,
+//                 454622 ]   /* { time: 0.1, number: 1824, count: 454622 } */
+//             ]
+//           },
+//         },
+//         /* more sample-group objects with different id's */
+//       ]
+//     },
+//     /* more counters */
+//   ],
+// }
+//
+
+}  // namespace baseprofiler
+}  // namespace mozilla
+
+#endif /* ndef ProfileBufferEntry_h */
diff --git a/mozglue/baseprofiler/core/ProfileJSONWriter.cpp b/mozglue/baseprofiler/core/ProfileJSONWriter.cpp
new file mode 100644
index 0000000000..dc51f6958e
--- /dev/null
+++ b/mozglue/baseprofiler/core/ProfileJSONWriter.cpp
@@ -0,0 +1,101 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/BaseProfileJSONWriter.h"
+
+namespace mozilla::baseprofiler {
+
+UniqueJSONStrings::UniqueJSONStrings(FailureLatch& aFailureLatch)
+    : mStringTableWriter(aFailureLatch) {
+  mStringTableWriter.StartBareList();
+  if (const char* failure = mStringTableWriter.GetFailure(); failure) {
+    ClearAndSetFailure(failure);
+    return;
+  }
+}
+
+UniqueJSONStrings::UniqueJSONStrings(FailureLatch& aFailureLatch,
+                                     const UniqueJSONStrings& aOther,
+                                     ProgressLogger aProgressLogger)
+    : mStringTableWriter(aFailureLatch) {
+  using namespace mozilla::literals::ProportionValue_literals;  // For `10_pc`.
+
+  if (mStringTableWriter.Failed()) {
+    return;
+  }
+
+  if (const char* failure = aOther.GetFailure(); failure) {
+    ClearAndSetFailure(failure);
+    return;
+  }
+
+  mStringTableWriter.StartBareList();
+  uint32_t count = aOther.mStringHashToIndexMap.count();
+  if (count != 0) {
+    if (!mStringHashToIndexMap.reserve(count)) {
+      ClearAndSetFailure("Cannot reserve UniqueJSONStrings map storage");
+      return;
+    }
+    auto iter = aOther.mStringHashToIndexMap.iter();
+    for (auto&& [unusedIndex, progressLogger] :
+         aProgressLogger.CreateLoopSubLoggersFromTo(
+             10_pc, 90_pc, count, "Copying unique strings...")) {
+      (void)unusedIndex;
+      if (iter.done()) {
+        break;
+      }
+      mStringHashToIndexMap.putNewInfallible(iter.get().key(),
+                                             iter.get().value());
+      iter.next();
+    }
+    aProgressLogger.SetLocalProgress(90_pc, "Copied unique strings");
+    mStringTableWriter.CopyAndSplice(
+        aOther.mStringTableWriter.ChunkedWriteFunc());
+    if (const char* failure = aOther.GetFailure(); failure) {
+      ClearAndSetFailure(failure);
+    }
+    aProgressLogger.SetLocalProgress(100_pc, "Spliced unique strings");
+  }
+}
+
+UniqueJSONStrings::~UniqueJSONStrings() = default;
+
+void UniqueJSONStrings::SpliceStringTableElements(
+    SpliceableJSONWriter& aWriter) {
+  aWriter.TakeAndSplice(mStringTableWriter.TakeChunkedWriteFunc());
+}
+
+void UniqueJSONStrings::ClearAndSetFailure(std::string aFailure) {
+  mStringTableWriter.SetFailure(std::move(aFailure));
+  mStringHashToIndexMap.clear();
+}
+
+Maybe<uint32_t> UniqueJSONStrings::GetOrAddIndex(const Span<const char>& aStr) {
+  if (Failed()) {
+    return Nothing{};
+  }
+
+  uint32_t count = mStringHashToIndexMap.count();
+  HashNumber hash = HashString(aStr.data(), aStr.size());
+  auto entry = mStringHashToIndexMap.lookupForAdd(hash);
+  if (entry) {
+    MOZ_ASSERT(entry->value() < count);
+    return Some(entry->value());
+  }
+
+  if (!mStringHashToIndexMap.add(entry, hash, count)) {
+    ClearAndSetFailure("OOM in UniqueJSONStrings::GetOrAddIndex adding a map");
+    return Nothing{};
+  }
+  mStringTableWriter.StringElement(aStr);
+  if (const char* failure = mStringTableWriter.GetFailure(); failure) {
+    ClearAndSetFailure(failure);
+    return Nothing{};
+  }
+  return Some(count);
+}
+
+}  // namespace mozilla::baseprofiler
diff --git a/mozglue/baseprofiler/core/ProfiledThreadData.cpp b/mozglue/baseprofiler/core/ProfiledThreadData.cpp
new file mode 100644
index 0000000000..62cb994ae2
--- /dev/null
+++ b/mozglue/baseprofiler/core/ProfiledThreadData.cpp
@@ -0,0 +1,191 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "ProfiledThreadData.h"
+
+#include "BaseProfiler.h"
+#include "ProfileBuffer.h"
+
+#include "mozilla/BaseProfileJSONWriter.h"
+
+#if defined(GP_OS_darwin)
+#  include <pthread.h>
+#endif
+
+namespace mozilla {
+namespace baseprofiler {
+
+ProfiledThreadData::ProfiledThreadData(ThreadInfo* aThreadInfo)
+    : mThreadInfo(aThreadInfo) {}
+
+ProfiledThreadData::~ProfiledThreadData() {}
+
+void ProfiledThreadData::StreamJSON(const ProfileBuffer& aBuffer,
+                                    SpliceableJSONWriter& aWriter,
+                                    const std::string& aProcessName,
+                                    const std::string& aETLDplus1,
+                                    const TimeStamp& aProcessStartTime,
+                                    double aSinceTime) {
+  UniqueStacks uniqueStacks;
+
+  aWriter.SetUniqueStrings(uniqueStacks.UniqueStrings());
+
+  aWriter.Start();
+  {
+    StreamSamplesAndMarkers(mThreadInfo->Name(), mThreadInfo->ThreadId(),
+                            aBuffer, aWriter, aProcessName, aETLDplus1,
+                            aProcessStartTime, mThreadInfo->RegisterTime(),
+                            mUnregisterTime, aSinceTime, uniqueStacks);
+
+    aWriter.StartObjectProperty("stackTable");
+    {
+      {
+        JSONSchemaWriter schema(aWriter);
+        schema.WriteField("prefix");
+        schema.WriteField("frame");
+      }
+
+      aWriter.StartArrayProperty("data");
+      { uniqueStacks.SpliceStackTableElements(aWriter); }
+      aWriter.EndArray();
+    }
+    aWriter.EndObject();
+
+    aWriter.StartObjectProperty("frameTable");
+    {
+      {
+        JSONSchemaWriter schema(aWriter);
+        schema.WriteField("location");
+        schema.WriteField("relevantForJS");
+        schema.WriteField("innerWindowID");
+        schema.WriteField("implementation");
+        schema.WriteField("line");
+        schema.WriteField("column");
+        schema.WriteField("category");
+        schema.WriteField("subcategory");
+      }
+
+      aWriter.StartArrayProperty("data");
+      { uniqueStacks.SpliceFrameTableElements(aWriter); }
+      aWriter.EndArray();
+    }
+    aWriter.EndObject();
+
+    aWriter.StartArrayProperty("stringTable");
+    {
+      std::move(uniqueStacks.UniqueStrings())
+          .SpliceStringTableElements(aWriter);
+    }
+    aWriter.EndArray();
+  }
+  aWriter.End();
+
+  aWriter.ResetUniqueStrings();
+}
+
+BaseProfilerThreadId StreamSamplesAndMarkers(
+    const char* aName, BaseProfilerThreadId aThreadId,
+    const ProfileBuffer& aBuffer, SpliceableJSONWriter& aWriter,
+    const std::string& aProcessName, const std::string& aETLDplus1,
+    const TimeStamp& aProcessStartTime, const TimeStamp& aRegisterTime,
+    const TimeStamp& aUnregisterTime, double aSinceTime,
+    UniqueStacks& aUniqueStacks) {
+  BaseProfilerThreadId processedThreadId;
+
+  aWriter.StringProperty(
+      "processType",
+      "(unknown)" /* XRE_GeckoProcessTypeToString(XRE_GetProcessType()) */);
+
+  {
+    std::string name = aName;
+    // We currently need to distinguish threads output by Base Profiler from
+    // those in Gecko Profiler, as the frontend could get confused and lose
+    // tracks with the same name.
+    // TODO: As part of the profilers de-duplication, thread data from both
+    // profilers should end up in the same track, at which point this won't be
+    // necessary anymore. See meta bug 1557566.
+    name += " (pre-xul)";
+    aWriter.StringProperty("name", name);
+  }
+
+  // Use given process name (if any).
+  if (!aProcessName.empty()) {
+    aWriter.StringProperty("processName", aProcessName);
+  }
+  if (!aETLDplus1.empty()) {
+    aWriter.StringProperty("eTLD+1", aETLDplus1);
+  }
+
+  if (aRegisterTime) {
+    aWriter.DoubleProperty(
+        "registerTime", (aRegisterTime - aProcessStartTime).ToMilliseconds());
+  } else {
+    aWriter.NullProperty("registerTime");
+  }
+
+  if (aUnregisterTime) {
+    aWriter.DoubleProperty(
+        "unregisterTime",
+        (aUnregisterTime - aProcessStartTime).ToMilliseconds());
+  } else {
+    aWriter.NullProperty("unregisterTime");
+  }
+
+  aWriter.StartObjectProperty("samples");
+  {
+    {
+      JSONSchemaWriter schema(aWriter);
+      schema.WriteField("stack");
+      schema.WriteField("time");
+      schema.WriteField("eventDelay");
+    }
+
+    aWriter.StartArrayProperty("data");
+    {
+      processedThreadId = aBuffer.StreamSamplesToJSON(
+          aWriter, aThreadId, aSinceTime, aUniqueStacks);
+    }
+    aWriter.EndArray();
+  }
+  aWriter.EndObject();
+
+  aWriter.StartObjectProperty("markers");
+  {
+    {
+      JSONSchemaWriter schema(aWriter);
+      schema.WriteField("name");
+      schema.WriteField("startTime");
+      schema.WriteField("endTime");
+      schema.WriteField("phase");
+      schema.WriteField("category");
+      schema.WriteField("data");
+    }
+
+    aWriter.StartArrayProperty("data");
+    {
+      aBuffer.StreamMarkersToJSON(aWriter, aThreadId, aProcessStartTime,
+                                  aSinceTime, aUniqueStacks);
+    }
+    aWriter.EndArray();
+  }
+  aWriter.EndObject();
+
+  // Tech note: If `ToNumber()` returns a uint64_t, the conversion to int64_t is
+  // "implementation-defined" before C++20. This is acceptable here, because
+  // this is a one-way conversion to a unique identifier that's used to visually
+  // separate data by thread on the front-end.
+  aWriter.IntProperty(
+      "pid", static_cast<int64_t>(profiler_current_process_id().ToNumber()));
+  aWriter.IntProperty("tid",
+                      static_cast<int64_t>(aThreadId.IsSpecified()
+                                               ? aThreadId.ToNumber()
+                                               : processedThreadId.ToNumber()));
+
+  return processedThreadId;
+}
+
+}  // namespace baseprofiler
+}  // namespace mozilla
diff --git a/mozglue/baseprofiler/core/ProfiledThreadData.h b/mozglue/baseprofiler/core/ProfiledThreadData.h
new file mode 100644
index 0000000000..0590b03326
--- /dev/null
+++ b/mozglue/baseprofiler/core/ProfiledThreadData.h
@@ -0,0 +1,120 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef ProfiledThreadData_h
+#define ProfiledThreadData_h
+
+#include "BaseProfilingStack.h"
+#include "platform.h"
+#include "ProfileBufferEntry.h"
+#include "ThreadInfo.h"
+
+#include "mozilla/RefPtr.h"
+#include "mozilla/TimeStamp.h"
+#include "mozilla/UniquePtr.h"
+
+#include <string>
+
+namespace mozilla {
+namespace baseprofiler {
+
+class ProfileBuffer;
+
+// This class contains information about a thread that is only relevant while
+// the profiler is running, for any threads (both alive and dead) whose thread
+// name matches the "thread filter" in the current profiler run.
+// ProfiledThreadData objects may be kept alive even after the thread is
+// unregistered, as long as there is still data for that thread in the profiler
+// buffer.
+//
+// Accesses to this class are protected by the profiler state lock.
+//
+// Created as soon as the following are true for the thread:
+//  - The profiler is running, and
+//  - the thread matches the profiler's thread filter, and
+//  - the thread is registered with the profiler.
+// So it gets created in response to either (1) the profiler being started (for
+// an existing registered thread) or (2) the thread being registered (if the
+// profiler is already running).
+//
+// The thread may be unregistered during the lifetime of ProfiledThreadData.
+// If that happens, NotifyUnregistered() is called.
+//
+// This class is the right place to store buffer positions. Profiler buffer
+// positions become invalid if the profiler buffer is destroyed, which happens
+// when the profiler is stopped.
+class ProfiledThreadData final {
+ public:
+  explicit ProfiledThreadData(ThreadInfo* aThreadInfo);
+  ~ProfiledThreadData();
+
+  void NotifyUnregistered(uint64_t aBufferPosition) {
+    mLastSample = Nothing();
+    MOZ_ASSERT(!mBufferPositionWhenReceivedJSContext,
+               "JSContext should have been cleared before the thread was "
+               "unregistered");
+    mUnregisterTime = TimeStamp::Now();
+    mBufferPositionWhenUnregistered = Some(aBufferPosition);
+  }
+  Maybe<uint64_t> BufferPositionWhenUnregistered() {
+    return mBufferPositionWhenUnregistered;
+  }
+
+  Maybe<uint64_t>& LastSample() { return mLastSample; }
+
+  void StreamJSON(const ProfileBuffer& aBuffer, SpliceableJSONWriter& aWriter,
+                  const std::string& aProcessName,
+                  const std::string& aETLDplus1,
+                  const TimeStamp& aProcessStartTime, double aSinceTime);
+
+  const RefPtr<ThreadInfo> Info() const { return mThreadInfo; }
+
+  void NotifyReceivedJSContext(uint64_t aCurrentBufferPosition) {
+    mBufferPositionWhenReceivedJSContext = Some(aCurrentBufferPosition);
+  }
+
+ private:
+  // Group A:
+  // The following fields are interesting for the entire lifetime of a
+  // ProfiledThreadData object.
+
+  // This thread's thread info.
+  const RefPtr<ThreadInfo> mThreadInfo;
+
+  // Group B:
+  // The following fields are only used while this thread is alive and
+  // registered. They become Nothing() once the thread is unregistered.
+
+  // When sampling, this holds the position in ActivePS::mBuffer of the most
+  // recent sample for this thread, or Nothing() if there is no sample for this
+  // thread in the buffer.
+  Maybe<uint64_t> mLastSample;
+
+  // Only non-Nothing() if the thread currently has a JSContext.
+  Maybe<uint64_t> mBufferPositionWhenReceivedJSContext;
+
+  // Group C:
+  // The following fields are only used once this thread has been unregistered.
+
+  Maybe<uint64_t> mBufferPositionWhenUnregistered;
+  TimeStamp mUnregisterTime;
+};
+
+// Stream all samples and markers from aBuffer with the given aThreadId (or 0
+// for everything, which is assumed to be a single backtrace sample.)
+// Returns the thread id of the output sample(s), or 0 if none was present.
+BaseProfilerThreadId StreamSamplesAndMarkers(
+    const char* aName, BaseProfilerThreadId aThreadId,
+    const ProfileBuffer& aBuffer, SpliceableJSONWriter& aWriter,
+    const std::string& aProcessName, const std::string& aETLDplus1,
+    const TimeStamp& aProcessStartTime, const TimeStamp& aRegisterTime,
+    const TimeStamp& aUnregisterTime, double aSinceTime,
+    UniqueStacks& aUniqueStacks);
+
+}  // namespace baseprofiler
+}  // namespace mozilla
+
+#endif  // ProfiledThreadData_h
diff --git a/mozglue/baseprofiler/core/ProfilerBacktrace.cpp b/mozglue/baseprofiler/core/ProfilerBacktrace.cpp
new file mode 100644
index 0000000000..8343888351
--- /dev/null
+++ b/mozglue/baseprofiler/core/ProfilerBacktrace.cpp
@@ -0,0 +1,125 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "ProfilerBacktrace.h"
+
+#include "BaseProfiler.h"
+#include "ProfileBuffer.h"
+#include "ProfiledThreadData.h"
+#include "ThreadInfo.h"
+
+#include "mozilla/BaseProfileJSONWriter.h"
+
+namespace mozilla {
+namespace baseprofiler {
+
+ProfilerBacktrace::ProfilerBacktrace(
+    const char* aName,
+    UniquePtr<ProfileChunkedBuffer> aProfileChunkedBufferStorage,
+    UniquePtr<ProfileBuffer> aProfileBufferStorageOrNull /* = nullptr */)
+    : mName(aName),
+      mOptionalProfileChunkedBufferStorage(
+          std::move(aProfileChunkedBufferStorage)),
+      mProfileChunkedBuffer(mOptionalProfileChunkedBufferStorage.get()),
+      mOptionalProfileBufferStorage(std::move(aProfileBufferStorageOrNull)),
+      mProfileBuffer(mOptionalProfileBufferStorage.get()) {
+  if (mProfileBuffer) {
+    MOZ_RELEASE_ASSERT(mProfileChunkedBuffer,
+                       "If we take ownership of a ProfileBuffer, we must also "
+                       "receive ownership of a ProfileChunkedBuffer");
+    MOZ_RELEASE_ASSERT(
+        mProfileChunkedBuffer == &mProfileBuffer->UnderlyingChunkedBuffer(),
+        "If we take ownership of a ProfileBuffer, we must also receive "
+        "ownership of its ProfileChunkedBuffer");
+  }
+  MOZ_ASSERT(
+      !mProfileChunkedBuffer || !mProfileChunkedBuffer->IsThreadSafe(),
+      "ProfilerBacktrace only takes a non-thread-safe ProfileChunkedBuffer");
+}
+
+ProfilerBacktrace::ProfilerBacktrace(
+    const char* aName,
+    ProfileChunkedBuffer* aExternalProfileChunkedBufferOrNull /* = nullptr */,
+    ProfileBuffer* aExternalProfileBufferOrNull /* = nullptr */)
+    : mName(aName),
+      mProfileChunkedBuffer(aExternalProfileChunkedBufferOrNull),
+      mProfileBuffer(aExternalProfileBufferOrNull) {
+  if (!mProfileChunkedBuffer) {
+    if (mProfileBuffer) {
+      // We don't have a ProfileChunkedBuffer but we have a ProfileBuffer, use
+      // the latter's ProfileChunkedBuffer.
+      mProfileChunkedBuffer = &mProfileBuffer->UnderlyingChunkedBuffer();
+      MOZ_ASSERT(!mProfileChunkedBuffer->IsThreadSafe(),
+                 "ProfilerBacktrace only takes a non-thread-safe "
+                 "ProfileChunkedBuffer");
+    }
+  } else {
+    if (mProfileBuffer) {
+      MOZ_RELEASE_ASSERT(
+          mProfileChunkedBuffer == &mProfileBuffer->UnderlyingChunkedBuffer(),
+          "If we reference both ProfileChunkedBuffer and ProfileBuffer, they "
+          "must already be connected");
+    }
+    MOZ_ASSERT(!mProfileChunkedBuffer->IsThreadSafe(),
+               "ProfilerBacktrace only takes a non-thread-safe "
+               "ProfileChunkedBuffer");
+  }
+}
+
+ProfilerBacktrace::~ProfilerBacktrace() {}
+
+BaseProfilerThreadId ProfilerBacktrace::StreamJSON(
+    SpliceableJSONWriter& aWriter, const TimeStamp& aProcessStartTime,
+    UniqueStacks& aUniqueStacks) {
+  BaseProfilerThreadId processedThreadId;
+
+  // Unlike ProfiledThreadData::StreamJSON, we don't need to call
+  // ProfileBuffer::AddJITInfoForRange because ProfileBuffer does not contain
+  // any JitReturnAddr entries. For synchronous samples, JIT frames get expanded
+  // at sample time.
+  if (mProfileBuffer) {
+    processedThreadId = StreamSamplesAndMarkers(
+        mName.c_str(), BaseProfilerThreadId{}, *mProfileBuffer, aWriter, "", "",
+        aProcessStartTime,
+        /* aRegisterTime */ TimeStamp(),
+        /* aUnregisterTime */ TimeStamp(),
+        /* aSinceTime */ 0, aUniqueStacks);
+  } else if (mProfileChunkedBuffer) {
+    ProfileBuffer profileBuffer(*mProfileChunkedBuffer);
+    processedThreadId = StreamSamplesAndMarkers(
+        mName.c_str(), BaseProfilerThreadId{}, profileBuffer, aWriter, "", "",
+        aProcessStartTime,
+        /* aRegisterTime */ TimeStamp(),
+        /* aUnregisterTime */ TimeStamp(),
+        /* aSinceTime */ 0, aUniqueStacks);
+  }
+  // If there are no buffers, the backtrace is empty and nothing is streamed.
+
+  return processedThreadId;
+}
+
+}  // namespace baseprofiler
+
+// static
+template <typename Destructor>
+UniquePtr<baseprofiler::ProfilerBacktrace, Destructor>
+ProfileBufferEntryReader::
+    Deserializer<UniquePtr<baseprofiler::ProfilerBacktrace, Destructor>>::Read(
+        ProfileBufferEntryReader& aER) {
+  auto profileChunkedBuffer = aER.ReadObject<UniquePtr<ProfileChunkedBuffer>>();
+  if (!profileChunkedBuffer) {
+    return nullptr;
+  }
+  MOZ_ASSERT(
+      !profileChunkedBuffer->IsThreadSafe(),
+      "ProfilerBacktrace only stores non-thread-safe ProfileChunkedBuffers");
+  std::string name = aER.ReadObject<std::string>();
+  return UniquePtr<baseprofiler::ProfilerBacktrace, Destructor>{
+      new baseprofiler::ProfilerBacktrace(name.c_str(),
+                                          std::move(profileChunkedBuffer))};
+};
+
+}  // namespace mozilla
diff --git a/mozglue/baseprofiler/core/ProfilerBacktrace.h b/mozglue/baseprofiler/core/ProfilerBacktrace.h
new file mode 100644
index 0000000000..0b5b69e738
--- /dev/null
+++ b/mozglue/baseprofiler/core/ProfilerBacktrace.h
@@ -0,0 +1,162 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef __PROFILER_BACKTRACE_H
+#define __PROFILER_BACKTRACE_H
+
+#include "mozilla/ProfileChunkedBuffer.h"
+#include "mozilla/UniquePtr.h"
+
+#include <string>
+
+namespace mozilla {
+
+class TimeStamp;
+
+namespace baseprofiler {
+
+class ProfileBuffer;
+class SpliceableJSONWriter;
+class ThreadInfo;
+class UniqueStacks;
+
+// ProfilerBacktrace encapsulates a synchronous sample.
+// It can work with a ProfileBuffer and/or a ProfileChunkedBuffer (if both, they
+// must already be linked together). The ProfileChunkedBuffer contains all the
+// data; the ProfileBuffer is not strictly needed, only provide it if it is
+// already available at the call site.
+// And these buffers can either be:
+// - owned here, so that the ProfilerBacktrace object can be kept for later
+//   use), OR
+// - referenced through pointers (in cases where the backtrace is immediately
+//   streamed out, so we only need temporary references to external buffers);
+//   these pointers may be null for empty backtraces.
+class ProfilerBacktrace {
+ public:
+  // Take ownership of external buffers and use them to keep, and to stream a
+  // backtrace. If a ProfileBuffer is given, its underlying chunked buffer must
+  // be provided as well.
+  explicit ProfilerBacktrace(
+      const char* aName,
+      UniquePtr<ProfileChunkedBuffer> aProfileChunkedBufferStorage,
+      UniquePtr<ProfileBuffer> aProfileBufferStorageOrNull = nullptr);
+
+  // Take pointers to external buffers and use them to stream a backtrace.
+  // If null, the backtrace is effectively empty.
+  // If both are provided, they must already be connected.
+  explicit ProfilerBacktrace(
+      const char* aName,
+      ProfileChunkedBuffer* aExternalProfileChunkedBufferOrNull = nullptr,
+      ProfileBuffer* aExternalProfileBufferOrNull = nullptr);
+
+  ~ProfilerBacktrace();
+
+  [[nodiscard]] bool IsEmpty() const {
+    return !mProfileChunkedBuffer ||
+           ProfileBufferEntryWriter::Serializer<ProfileChunkedBuffer>::Bytes(
+               *mProfileChunkedBuffer) <= ULEB128Size(0u);
+  }
+
+  // ProfilerBacktraces' stacks are deduplicated in the context of the
+  // profile that contains the backtrace as a marker payload.
+  //
+  // That is, markers that contain backtraces should not need their own stack,
+  // frame, and string tables. They should instead reuse their parent
+  // profile's tables.
+  BaseProfilerThreadId StreamJSON(SpliceableJSONWriter& aWriter,
+                                  const TimeStamp& aProcessStartTime,
+                                  UniqueStacks& aUniqueStacks);
+
+ private:
+  // Used to de/serialize a ProfilerBacktrace.
+  friend ProfileBufferEntryWriter::Serializer<ProfilerBacktrace>;
+  friend ProfileBufferEntryReader::Deserializer<ProfilerBacktrace>;
+
+  std::string mName;
+
+  // `ProfileChunkedBuffer` in which `mProfileBuffer` stores its data; must be
+  // located before `mProfileBuffer` so that it's destroyed after.
+  UniquePtr<ProfileChunkedBuffer> mOptionalProfileChunkedBufferStorage;
+  // If null, there is no need to check mProfileBuffer's (if present) underlying
+  // buffer because this is done when constructed.
+  ProfileChunkedBuffer* mProfileChunkedBuffer;
+
+  UniquePtr<ProfileBuffer> mOptionalProfileBufferStorage;
+  ProfileBuffer* mProfileBuffer;
+};
+
+}  // namespace baseprofiler
+
+// Format: [ UniquePtr<BlockRingsBuffer> | name ]
+// Initial len==0 marks a nullptr or empty backtrace.
+template <>
+struct ProfileBufferEntryWriter::Serializer<baseprofiler::ProfilerBacktrace> {
+  static Length Bytes(const baseprofiler::ProfilerBacktrace& aBacktrace) {
+    if (!aBacktrace.mProfileChunkedBuffer) {
+      // No buffer.
+      return ULEB128Size(0u);
+    }
+    auto bufferBytes = SumBytes(*aBacktrace.mProfileChunkedBuffer);
+    if (bufferBytes <= ULEB128Size(0u)) {
+      // Empty buffer.
+      return ULEB128Size(0u);
+    }
+    return bufferBytes + SumBytes(aBacktrace.mName);
+  }
+
+  static void Write(ProfileBufferEntryWriter& aEW,
+                    const baseprofiler::ProfilerBacktrace& aBacktrace) {
+    if (!aBacktrace.mProfileChunkedBuffer ||
+        SumBytes(*aBacktrace.mProfileChunkedBuffer) <= ULEB128Size(0u)) {
+      // No buffer, or empty buffer.
+      aEW.WriteULEB128(0u);
+      return;
+    }
+    aEW.WriteObject(*aBacktrace.mProfileChunkedBuffer);
+    aEW.WriteObject(aBacktrace.mName);
+  }
+};
+
+template <typename Destructor>
+struct ProfileBufferEntryWriter::Serializer<
+    UniquePtr<baseprofiler::ProfilerBacktrace, Destructor>> {
+  static Length Bytes(const UniquePtr<baseprofiler::ProfilerBacktrace,
+                                      Destructor>& aBacktrace) {
+    if (!aBacktrace) {
+      // Null backtrace pointer (treated like an empty backtrace).
+      return ULEB128Size(0u);
+    }
+    return SumBytes(*aBacktrace);
+  }
+
+  static void Write(ProfileBufferEntryWriter& aEW,
+                    const UniquePtr<baseprofiler::ProfilerBacktrace,
+                                    Destructor>& aBacktrace) {
+    if (!aBacktrace) {
+      // Null backtrace pointer (treated like an empty backtrace).
+      aEW.WriteULEB128(0u);
+      return;
+    }
+    aEW.WriteObject(*aBacktrace);
+  }
+};
+
+template <typename Destructor>
+struct ProfileBufferEntryReader::Deserializer<
+    UniquePtr<baseprofiler::ProfilerBacktrace, Destructor>> {
+  static void ReadInto(
+      ProfileBufferEntryReader& aER,
+      UniquePtr<baseprofiler::ProfilerBacktrace, Destructor>& aBacktrace) {
+    aBacktrace = Read(aER);
+  }
+
+  static UniquePtr<baseprofiler::ProfilerBacktrace, Destructor> Read(
+      ProfileBufferEntryReader& aER);
+};
+
+}  // namespace mozilla
+
+#endif  // __PROFILER_BACKTRACE_H
diff --git a/mozglue/baseprofiler/core/ProfilerMarkers.cpp b/mozglue/baseprofiler/core/ProfilerMarkers.cpp
new file mode 100644
index 0000000000..2a6115c166
--- /dev/null
+++ b/mozglue/baseprofiler/core/ProfilerMarkers.cpp
@@ -0,0 +1,415 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/BaseProfilerMarkers.h"
+
+#include "mozilla/BaseProfilerUtils.h"
+
+#include <limits>
+
+namespace mozilla {
+namespace base_profiler_markers_detail {
+
+// We need an atomic type that can hold a `DeserializerTag`. (Atomic doesn't
+// work with too-small types.)
+using DeserializerTagAtomic = unsigned;
+
+// The atomic sDeserializerCount still also include bits that act as a "RWLock":
+// Whoever can set this bit gets exclusive access to the count and the whole
+// sMarkerTypeFunctions1Based array, guaranteeing that it cannot be modified.
+static constexpr DeserializerTagAtomic scExclusiveLock = 0x80'00'00'00u;
+// Code that wants shared access can add this value, then ensure there is no
+// exclusive lock, after which it's guaranteed that no exclusive lock can be
+// taken until the shared lock count goes back to zero.
+static constexpr DeserializerTagAtomic scSharedLockUnit = 0x00'01'00'00u;
+// This mask isolates the actual count value from the lock bits.
+static constexpr DeserializerTagAtomic scTagMask = 0x00'00'FF'FFu;
+
+// Number of currently-registered deserializers and other marker type functions.
+// The high bits contain lock bits, see above.
+static Atomic<DeserializerTagAtomic, MemoryOrdering::ReleaseAcquire>
+    sDeserializerCount{0};
+
+// This needs to be big enough to handle all possible marker types. If one day
+// this needs to be higher, the underlying DeserializerTag type will have to be
+// changed.
+static constexpr DeserializerTagAtomic DeserializerMax = 250;
+static_assert(DeserializerMax <= scTagMask,
+              "DeserializerMax doesn't fit in scTagMask");
+
+static_assert(
+    DeserializerMax <= std::numeric_limits<Streaming::DeserializerTag>::max(),
+    "The maximum number of deserializers must fit in the DeserializerTag type");
+
+// Array of marker type functions.
+// 1-based, i.e.: [0] -> tag 1, [DeserializerMax - 1] -> tag DeserializerMax.
+// Elements are added at the next available atomically-incremented
+// `sDeserializerCount` (minus 1) whenever a new marker type is used in a
+// Firefox session; the content is kept between profiler runs in that session.
+// There is theoretically a race between the increment and the time the entry is
+// fully written, but in practice all new elements are written (during
+// profiling, using a marker type for the first time) long before they are read
+// (after profiling is paused).
+static Streaming::MarkerTypeFunctions
+    sMarkerTypeFunctions1Based[DeserializerMax];
+
+/* static */ Streaming::DeserializerTag Streaming::TagForMarkerTypeFunctions(
+    Streaming::MarkerDataDeserializer aDeserializer,
+    Streaming::MarkerTypeNameFunction aMarkerTypeNameFunction,
+    Streaming::MarkerSchemaFunction aMarkerSchemaFunction) {
+  MOZ_RELEASE_ASSERT(!!aDeserializer);
+  MOZ_RELEASE_ASSERT(!!aMarkerTypeNameFunction);
+  MOZ_RELEASE_ASSERT(!!aMarkerSchemaFunction);
+
+  // Add a shared lock request, which will prevent future exclusive locking.
+  DeserializerTagAtomic tagWithLock = (sDeserializerCount += scSharedLockUnit);
+
+  // An exclusive locker may have arrived before us, just wait for it to finish.
+  while ((tagWithLock & scExclusiveLock) != 0u) {
+    tagWithLock = sDeserializerCount;
+  }
+
+  MOZ_ASSERT(
+      // This is equivalent to shifting right to only keep the lock counts.
+      tagWithLock / scSharedLockUnit <
+          // This is effectively half of the permissible shared lock range,
+          // that would mean way too many threads doing this work here!
+          scExclusiveLock / scSharedLockUnit / 2,
+      "The shared lock count is getting unexpectedly high, verify the "
+      "algorithm, and tweak constants if needed");
+
+  // Reserve a tag. Even if there are multiple shared-lock holders here, each
+  // one will get a different value, and therefore will access a different part
+  // of the sMarkerTypeFunctions1Based array.
+  const DeserializerTagAtomic tag = ++sDeserializerCount & scTagMask;
+
+  MOZ_RELEASE_ASSERT(
+      tag <= DeserializerMax,
+      "Too many deserializers, consider increasing DeserializerMax. "
+      "Or is a deserializer stored again and again?");
+  sMarkerTypeFunctions1Based[tag - 1] = {aDeserializer, aMarkerTypeNameFunction,
+                                         aMarkerSchemaFunction};
+
+  // And release our shared lock, to allow exclusive readers.
+  sDeserializerCount -= scSharedLockUnit;
+
+  return static_cast<DeserializerTag>(tag);
+}
+
+/* static */ Streaming::MarkerDataDeserializer Streaming::DeserializerForTag(
+    Streaming::DeserializerTag aTag) {
+  MOZ_RELEASE_ASSERT(
+      aTag > 0 && static_cast<DeserializerTagAtomic>(aTag) <=
+                      static_cast<DeserializerTagAtomic>(sDeserializerCount),
+      "Out-of-range tag value");
+  return sMarkerTypeFunctions1Based[aTag - 1].mMarkerDataDeserializer;
+}
+
+Streaming::LockedMarkerTypeFunctionsList::LockedMarkerTypeFunctionsList() {
+  for (;;) {
+    const DeserializerTagAtomic count = sDeserializerCount;
+    if ((count & scTagMask) != count) {
+      // Someone already has a lock, loop around.
+      continue;
+    }
+
+    // There are currently no locks, try to add our exclusive lock.
+    if (!sDeserializerCount.compareExchange(count, count | scExclusiveLock)) {
+      // Someone else modified sDeserializerCount since our read, loop around.
+      continue;
+    }
+
+    // We applied our exclusive lock, we can now read the list of functions,
+    // without interference until ~LockedMarkerTypeFunctionsList().
+    // (Note that sDeserializerCount may receive shared lock requests, but the
+    // count won't change.)
+    mMarkerTypeFunctionsSpan = {sMarkerTypeFunctions1Based, count};
+    break;
+  }
+}
+
+Streaming::LockedMarkerTypeFunctionsList::~LockedMarkerTypeFunctionsList() {
+  MOZ_ASSERT(
+      (sDeserializerCount & scExclusiveLock) == scExclusiveLock,
+      "sDeserializerCount should still have the the exclusive lock bit set");
+  MOZ_ASSERT(
+      (sDeserializerCount & scTagMask) ==
+          DeserializerTagAtomic(mMarkerTypeFunctionsSpan.size()),
+      "sDeserializerCount should have the same count since construction");
+  sDeserializerCount &= ~scExclusiveLock;
+}
+
+// Only accessed on the main thread.
+// Both profilers (Base and Gecko) could be active at the same time, so keep a
+// ref-count to only allocate at most one buffer at any time.
+static int sBufferForMainThreadAddMarkerRefCount = 0;
+static ProfileChunkedBuffer* sBufferForMainThreadAddMarker = nullptr;
+
+ProfileChunkedBuffer* GetClearedBufferForMainThreadAddMarker() {
+  if (!mozilla::baseprofiler::profiler_is_main_thread()) {
+    return nullptr;
+  }
+
+  if (sBufferForMainThreadAddMarker) {
+    MOZ_ASSERT(sBufferForMainThreadAddMarker->IsInSession(),
+               "sBufferForMainThreadAddMarker should always be in-session");
+    sBufferForMainThreadAddMarker->Clear();
+    MOZ_ASSERT(
+        sBufferForMainThreadAddMarker->IsInSession(),
+        "Cleared sBufferForMainThreadAddMarker should still be in-session");
+  }
+
+  return sBufferForMainThreadAddMarker;
+}
+
+MFBT_API void EnsureBufferForMainThreadAddMarker() {
+  if (!mozilla::baseprofiler::profiler_is_main_thread()) {
+    return;
+  }
+
+  if (sBufferForMainThreadAddMarkerRefCount++ == 0) {
+    // First `Ensure`, allocate the buffer.
+    MOZ_ASSERT(!sBufferForMainThreadAddMarker);
+    sBufferForMainThreadAddMarker = new ProfileChunkedBuffer(
+        ProfileChunkedBuffer::ThreadSafety::WithoutMutex,
+        MakeUnique<ProfileBufferChunkManagerSingle>(
+            ProfileBufferChunkManager::scExpectedMaximumStackSize));
+    MOZ_ASSERT(sBufferForMainThreadAddMarker);
+    MOZ_ASSERT(sBufferForMainThreadAddMarker->IsInSession());
+  }
+}
+
+MFBT_API void ReleaseBufferForMainThreadAddMarker() {
+  if (!mozilla::baseprofiler::profiler_is_main_thread()) {
+    return;
+  }
+
+  if (sBufferForMainThreadAddMarkerRefCount == 0) {
+    // Unexpected Release! This should not normally happen, but it's harmless in
+    // practice, it means the buffer is not alive anyway.
+    return;
+  }
+
+  MOZ_ASSERT(sBufferForMainThreadAddMarker);
+  MOZ_ASSERT(sBufferForMainThreadAddMarker->IsInSession());
+  if (--sBufferForMainThreadAddMarkerRefCount == 0) {
+    // Last `Release`, destroy the buffer.
+    delete sBufferForMainThreadAddMarker;
+    sBufferForMainThreadAddMarker = nullptr;
+  }
+}
+
+}  // namespace base_profiler_markers_detail
+
+void MarkerSchema::Stream(JSONWriter& aWriter,
+                          const Span<const char>& aName) && {
+  // The caller should have started a JSON array, in which we can add an object
+  // that defines a marker schema.
+
+  if (mLocations.empty()) {
+    // SpecialFrontendLocation case, don't output anything for this type.
+    return;
+  }
+
+  aWriter.StartObjectElement();
+  {
+    aWriter.StringProperty("name", aName);
+
+    if (!mChartLabel.empty()) {
+      aWriter.StringProperty("chartLabel", mChartLabel);
+    }
+
+    if (!mTooltipLabel.empty()) {
+      aWriter.StringProperty("tooltipLabel", mTooltipLabel);
+    }
+
+    if (!mTableLabel.empty()) {
+      aWriter.StringProperty("tableLabel", mTableLabel);
+    }
+
+    aWriter.StartArrayProperty("display");
+    {
+      for (Location location : mLocations) {
+        aWriter.StringElement(LocationToStringSpan(location));
+      }
+    }
+    aWriter.EndArray();
+
+    aWriter.StartArrayProperty("data");
+    {
+      for (const DataRow& row : mData) {
+        aWriter.StartObjectElement();
+        {
+          row.match(
+              [&aWriter](const DynamicData& aData) {
+                aWriter.StringProperty("key", aData.mKey);
+                if (aData.mLabel) {
+                  aWriter.StringProperty("label", *aData.mLabel);
+                }
+                aWriter.StringProperty("format",
+                                       FormatToStringSpan(aData.mFormat));
+                if (aData.mSearchable) {
+                  aWriter.BoolProperty(
+                      "searchable",
+                      *aData.mSearchable == Searchable::Searchable);
+                }
+              },
+              [&aWriter](const StaticData& aStaticData) {
+                aWriter.StringProperty("label", aStaticData.mLabel);
+                aWriter.StringProperty("value", aStaticData.mValue);
+              });
+        }
+        aWriter.EndObject();
+      }
+    }
+    aWriter.EndArray();
+
+    if (!mGraphs.empty()) {
+      aWriter.StartArrayProperty("graphs");
+      {
+        for (const GraphData& graph : mGraphs) {
+          aWriter.StartObjectElement();
+          {
+            aWriter.StringProperty("key", graph.mKey);
+            aWriter.StringProperty("type", GraphTypeToStringSpan(graph.mType));
+            if (graph.mColor) {
+              aWriter.StringProperty("color",
+                                     GraphColorToStringSpan(*graph.mColor));
+            }
+          }
+          aWriter.EndObject();
+        }
+      }
+      aWriter.EndArray();
+    }
+  }
+  aWriter.EndObject();
+}
+
+/* static */
+Span<const char> MarkerSchema::LocationToStringSpan(
+    MarkerSchema::Location aLocation) {
+  switch (aLocation) {
+    case Location::MarkerChart:
+      return mozilla::MakeStringSpan("marker-chart");
+    case Location::MarkerTable:
+      return mozilla::MakeStringSpan("marker-table");
+    case Location::TimelineOverview:
+      return mozilla::MakeStringSpan("timeline-overview");
+    case Location::TimelineMemory:
+      return mozilla::MakeStringSpan("timeline-memory");
+    case Location::TimelineIPC:
+      return mozilla::MakeStringSpan("timeline-ipc");
+    case Location::TimelineFileIO:
+      return mozilla::MakeStringSpan("timeline-fileio");
+    case Location::StackChart:
+      return mozilla::MakeStringSpan("stack-chart");
+    default:
+      MOZ_CRASH("Unexpected Location enum");
+      return {};
+  }
+}
+
+/* static */
+Span<const char> MarkerSchema::FormatToStringSpan(
+    MarkerSchema::Format aFormat) {
+  switch (aFormat) {
+    case Format::Url:
+      return mozilla::MakeStringSpan("url");
+    case Format::FilePath:
+      return mozilla::MakeStringSpan("file-path");
+    case Format::String:
+      return mozilla::MakeStringSpan("string");
+    case Format::UniqueString:
+      return mozilla::MakeStringSpan("unique-string");
+    case Format::Duration:
+      return mozilla::MakeStringSpan("duration");
+    case Format::Time:
+      return mozilla::MakeStringSpan("time");
+    case Format::Seconds:
+      return mozilla::MakeStringSpan("seconds");
+    case Format::Milliseconds:
+      return mozilla::MakeStringSpan("milliseconds");
+    case Format::Microseconds:
+      return mozilla::MakeStringSpan("microseconds");
+    case Format::Nanoseconds:
+      return mozilla::MakeStringSpan("nanoseconds");
+    case Format::Bytes:
+      return mozilla::MakeStringSpan("bytes");
+    case Format::Percentage:
+      return mozilla::MakeStringSpan("percentage");
+    case Format::Integer:
+      return mozilla::MakeStringSpan("integer");
+    case Format::Decimal:
+      return mozilla::MakeStringSpan("decimal");
+    default:
+      MOZ_CRASH("Unexpected Format enum");
+      return {};
+  }
+}
+
+/* static */
+Span<const char> MarkerSchema::GraphTypeToStringSpan(
+    MarkerSchema::GraphType aType) {
+  switch (aType) {
+    case GraphType::Line:
+      return mozilla::MakeStringSpan("line");
+    case GraphType::Bar:
+      return mozilla::MakeStringSpan("bar");
+    case GraphType::FilledLine:
+      return mozilla::MakeStringSpan("line-filled");
+    default:
+      MOZ_CRASH("Unexpected GraphType enum");
+      return {};
+  }
+}
+
+/* static */
+Span<const char> MarkerSchema::GraphColorToStringSpan(
+    MarkerSchema::GraphColor aColor) {
+  switch (aColor) {
+    case GraphColor::Blue:
+      return mozilla::MakeStringSpan("blue");
+    case GraphColor::Green:
+      return mozilla::MakeStringSpan("green");
+    case GraphColor::Grey:
+      return mozilla::MakeStringSpan("grey");
+    case GraphColor::Ink:
+      return mozilla::MakeStringSpan("ink");
+    case GraphColor::Magenta:
+      return mozilla::MakeStringSpan("magenta");
+    case GraphColor::Orange:
+      return mozilla::MakeStringSpan("orange");
+    case GraphColor::Purple:
+      return mozilla::MakeStringSpan("purple");
+    case GraphColor::Red:
+      return mozilla::MakeStringSpan("red");
+    case GraphColor::Teal:
+      return mozilla::MakeStringSpan("teal");
+    case GraphColor::Yellow:
+      return mozilla::MakeStringSpan("yellow");
+    default:
+      MOZ_CRASH("Unexpected GraphColor enum");
+      return {};
+  }
+}
+
+}  // namespace mozilla
+
+namespace mozilla::baseprofiler {
+template MFBT_API ProfileBufferBlockIndex AddMarker(const ProfilerString8View&,
+                                                    const MarkerCategory&,
+                                                    MarkerOptions&&,
+                                                    markers::TextMarker,
+                                                    const std::string&);
+
+template MFBT_API ProfileBufferBlockIndex
+AddMarkerToBuffer(ProfileChunkedBuffer&, const ProfilerString8View&,
+                  const MarkerCategory&, MarkerOptions&&, markers::NoPayload);
+
+template MFBT_API ProfileBufferBlockIndex AddMarkerToBuffer(
+    ProfileChunkedBuffer&, const ProfilerString8View&, const MarkerCategory&,
+    MarkerOptions&&, markers::TextMarker, const std::string&);
+}  // namespace mozilla::baseprofiler
diff --git a/mozglue/baseprofiler/core/ProfilerUtils.cpp b/mozglue/baseprofiler/core/ProfilerUtils.cpp
new file mode 100644
index 0000000000..5f53910774
--- /dev/null
+++ b/mozglue/baseprofiler/core/ProfilerUtils.cpp
@@ -0,0 +1,162 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// This file implements functions from BaseProfilerUtils.h on all platforms.
+// Functions with platform-specific implementations are separated in #if blocks
+// below, with each block being self-contained with all the #includes and
+// definitions it needs, to keep platform code easier to maintain in isolation.
+
+#include "mozilla/BaseProfilerUtils.h"
+
+// --------------------------------------------- WASI process & thread ids
+#if defined(__wasi__)
+
+namespace mozilla::baseprofiler {
+
+// WASI is single-process and single-thread for now.
+
+BaseProfilerProcessId profiler_current_process_id() {
+  return BaseProfilerProcessId::FromNativeId(1u);
+}
+
+BaseProfilerThreadId profiler_current_thread_id() {
+  return BaseProfilerThreadId::FromNativeId(1u);
+}
+
+}  // namespace mozilla::baseprofiler
+
+// --------------------------------------------- Windows process & thread ids
+#elif defined(XP_WIN)
+
+#  include <process.h>
+#  include <processthreadsapi.h>
+
+namespace mozilla::baseprofiler {
+
+BaseProfilerProcessId profiler_current_process_id() {
+  return BaseProfilerProcessId::FromNativeId(_getpid());
+}
+
+BaseProfilerThreadId profiler_current_thread_id() {
+  static_assert(std::is_same_v<BaseProfilerThreadId::NativeType,
+                               decltype(GetCurrentThreadId())>,
+                "BaseProfilerThreadId::NativeType must be exactly the type "
+                "returned by GetCurrentThreadId()");
+  return BaseProfilerThreadId::FromNativeId(GetCurrentThreadId());
+}
+
+}  // namespace mozilla::baseprofiler
+
+// --------------------------------------------- Non-Windows process id
+#else
+// All non-Windows platforms are assumed to be POSIX, which has getpid().
+
+#  include <unistd.h>
+
+namespace mozilla::baseprofiler {
+
+BaseProfilerProcessId profiler_current_process_id() {
+  return BaseProfilerProcessId::FromNativeId(getpid());
+}
+
+}  // namespace mozilla::baseprofiler
+
+// --------------------------------------------- Non-Windows thread id
+// ------------------------------------------------------- macOS
+#  if defined(XP_MACOSX)
+
+#    include <pthread.h>
+
+namespace mozilla::baseprofiler {
+
+BaseProfilerThreadId profiler_current_thread_id() {
+  uint64_t tid;
+  if (pthread_threadid_np(nullptr, &tid) != 0) {
+    return BaseProfilerThreadId{};
+  }
+  return BaseProfilerThreadId::FromNativeId(tid);
+}
+
+}  // namespace mozilla::baseprofiler
+
+// ------------------------------------------------------- Android
+// Test Android before Linux, because Linux includes Android.
+#  elif defined(__ANDROID__) || defined(ANDROID)
+
+namespace mozilla::baseprofiler {
+
+BaseProfilerThreadId profiler_current_thread_id() {
+  return BaseProfilerThreadId::FromNativeId(gettid());
+}
+
+}  // namespace mozilla::baseprofiler
+
+// ------------------------------------------------------- Linux
+#  elif defined(XP_LINUX)
+
+#    include <sys/syscall.h>
+
+namespace mozilla::baseprofiler {
+
+BaseProfilerThreadId profiler_current_thread_id() {
+  // glibc doesn't provide a wrapper for gettid() until 2.30
+  return BaseProfilerThreadId::FromNativeId(syscall(SYS_gettid));
+}
+
+}  // namespace mozilla::baseprofiler
+
+// ------------------------------------------------------- FreeBSD
+#  elif defined(XP_FREEBSD)
+
+#    include <sys/thr.h>
+
+namespace mozilla::baseprofiler {
+
+BaseProfilerThreadId profiler_current_thread_id() {
+  long id;
+  if (thr_self(&id) != 0) {
+    return BaseProfilerThreadId{};
+  }
+  return BaseProfilerThreadId::FromNativeId(id);
+}
+
+}  // namespace mozilla::baseprofiler
+
+// ------------------------------------------------------- Others
+#  else
+
+namespace mozilla::baseprofiler {
+
+BaseProfilerThreadId profiler_current_thread_id() {
+  return BaseProfilerThreadId::FromNativeId(std::this_thread::get_id());
+}
+
+}  // namespace mozilla::baseprofiler
+
+#  endif
+#endif  // End of non-XP_WIN.
+
+// --------------------------------------------- Platform-agnostic definitions
+
+namespace mozilla::baseprofiler {
+
+static BaseProfilerThreadId scBaseProfilerMainThreadId{};
+
+void profiler_init_main_thread_id() {
+  if (!scBaseProfilerMainThreadId.IsSpecified()) {
+    scBaseProfilerMainThreadId = profiler_current_thread_id();
+  }
+}
+
+BaseProfilerThreadId profiler_main_thread_id() {
+  return scBaseProfilerMainThreadId;
+}
+
+bool profiler_is_main_thread() {
+  return profiler_current_thread_id() == scBaseProfilerMainThreadId;
+}
+
+}  // namespace mozilla::baseprofiler
diff --git a/mozglue/baseprofiler/core/ProfilingCategory.cpp b/mozglue/baseprofiler/core/ProfilingCategory.cpp
new file mode 100644
index 0000000000..8ff2b15555
--- /dev/null
+++ b/mozglue/baseprofiler/core/ProfilingCategory.cpp
@@ -0,0 +1,71 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "BaseProfilingCategory.h"
+
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/Assertions.h"
+
+#include "BaseProfiler.h"
+
+namespace mozilla {
+namespace baseprofiler {
+
+// clang-format off
+
+// ProfilingSubcategory_X:
+// One enum for each category X, listing that category's subcategories. This
+// allows the sProfilingCategoryInfo macro construction below to look up a
+// per-category index for a subcategory.
+#define SUBCATEGORY_ENUMS_BEGIN_CATEGORY(name, labelAsString, color) \
+  enum class ProfilingSubcategory_##name : uint32_t {
+#define SUBCATEGORY_ENUMS_SUBCATEGORY(category, name, labelAsString) \
+    name,
+#define SUBCATEGORY_ENUMS_END_CATEGORY \
+  };
+MOZ_PROFILING_CATEGORY_LIST(SUBCATEGORY_ENUMS_BEGIN_CATEGORY,
+                            SUBCATEGORY_ENUMS_SUBCATEGORY,
+                            SUBCATEGORY_ENUMS_END_CATEGORY)
+#undef SUBCATEGORY_ENUMS_BEGIN_CATEGORY
+#undef SUBCATEGORY_ENUMS_SUBCATEGORY
+#undef SUBCATEGORY_ENUMS_END_CATEGORY
+
+// sProfilingCategoryPairInfo:
+// A list of ProfilingCategoryPairInfos with the same order as
+// ProfilingCategoryPair, which can be used to map a ProfilingCategoryPair to
+// its information.
+#define CATEGORY_INFO_BEGIN_CATEGORY(name, labelAsString, color)
+#define CATEGORY_INFO_SUBCATEGORY(category, name, labelAsString) \
+  {ProfilingCategory::category,                                  \
+   uint32_t(ProfilingSubcategory_##category::name), labelAsString},
+#define CATEGORY_INFO_END_CATEGORY
+const ProfilingCategoryPairInfo sProfilingCategoryPairInfo[] = {
+  MOZ_PROFILING_CATEGORY_LIST(CATEGORY_INFO_BEGIN_CATEGORY,
+                              CATEGORY_INFO_SUBCATEGORY,
+                              CATEGORY_INFO_END_CATEGORY)
+};
+#undef CATEGORY_INFO_BEGIN_CATEGORY
+#undef CATEGORY_INFO_SUBCATEGORY
+#undef CATEGORY_INFO_END_CATEGORY
+
+// clang-format on
+
+const ProfilingCategoryPairInfo& GetProfilingCategoryPairInfo(
+    ProfilingCategoryPair aCategoryPair) {
+  static_assert(
+      MOZ_ARRAY_LENGTH(sProfilingCategoryPairInfo) ==
+          uint32_t(ProfilingCategoryPair::COUNT),
+      "sProfilingCategoryPairInfo and ProfilingCategory need to have the "
+      "same order and the same length");
+
+  uint32_t categoryPairIndex = uint32_t(aCategoryPair);
+  MOZ_RELEASE_ASSERT(categoryPairIndex <=
+                     uint32_t(ProfilingCategoryPair::LAST));
+  return sProfilingCategoryPairInfo[categoryPairIndex];
+}
+
+}  // namespace baseprofiler
+}  // namespace mozilla
diff --git a/mozglue/baseprofiler/core/ProfilingStack.cpp b/mozglue/baseprofiler/core/ProfilingStack.cpp
new file mode 100644
index 0000000000..f5cd2ddd04
--- /dev/null
+++ b/mozglue/baseprofiler/core/ProfilingStack.cpp
@@ -0,0 +1,52 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "BaseProfilingStack.h"
+
+#include <algorithm>
+
+#include "mozilla/IntegerRange.h"
+#include "mozilla/UniquePtr.h"
+#include "mozilla/UniquePtrExtensions.h"
+
+#include "BaseProfiler.h"
+
+namespace mozilla {
+namespace baseprofiler {
+
+ProfilingStack::~ProfilingStack() {
+  // The label macros keep a reference to the ProfilingStack to avoid a TLS
+  // access. If these are somehow not all cleared we will get a
+  // use-after-free so better to crash now.
+  MOZ_RELEASE_ASSERT(stackPointer == 0);
+
+  delete[] frames;
+}
+
+void ProfilingStack::ensureCapacitySlow() {
+  MOZ_ASSERT(stackPointer >= capacity);
+  const uint32_t kInitialCapacity = 128;
+
+  uint32_t sp = stackPointer;
+  auto newCapacity =
+      std::max(sp + 1, capacity ? capacity * 2 : kInitialCapacity);
+
+  auto* newFrames = new ProfilingStackFrame[newCapacity];
+
+  // It's important that `frames` / `capacity` / `stackPointer` remain
+  // consistent here at all times.
+  for (auto i : IntegerRange(capacity)) {
+    newFrames[i] = frames[i];
+  }
+
+  ProfilingStackFrame* oldFrames = frames;
+  frames = newFrames;
+  capacity = newCapacity;
+  delete[] oldFrames;
+}
+
+}  // namespace baseprofiler
+}  // namespace mozilla
diff --git a/mozglue/baseprofiler/core/RegisteredThread.cpp b/mozglue/baseprofiler/core/RegisteredThread.cpp
new file mode 100644
index 0000000000..85a7fc2c6d
--- /dev/null
+++ b/mozglue/baseprofiler/core/RegisteredThread.cpp
@@ -0,0 +1,42 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "RegisteredThread.h"
+
+#include "BaseProfiler.h"
+
+namespace mozilla {
+namespace baseprofiler {
+
+RegisteredThread::RegisteredThread(ThreadInfo* aInfo, void* aStackTop)
+    : mRacyRegisteredThread(aInfo->ThreadId()),
+      mPlatformData(AllocPlatformData(aInfo->ThreadId())),
+      mStackTop(aStackTop),
+      mThreadInfo(aInfo) {
+  // We don't have to guess on mac
+#if defined(GP_OS_darwin)
+  pthread_t self = pthread_self();
+  mStackTop = pthread_get_stackaddr_np(self);
+#endif
+}
+
+RegisteredThread::~RegisteredThread() {}
+
+size_t RegisteredThread::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
+  size_t n = aMallocSizeOf(this);
+
+  // Measurement of the following members may be added later if DMD finds it
+  // is worthwhile:
+  // - mPlatformData
+  //
+  // The following members are not measured:
+  // - mThreadInfo: because it is non-owning
+
+  return n;
+}
+
+}  // namespace baseprofiler
+}  // namespace mozilla
diff --git a/mozglue/baseprofiler/core/RegisteredThread.h b/mozglue/baseprofiler/core/RegisteredThread.h
new file mode 100644
index 0000000000..baaf7dced6
--- /dev/null
+++ b/mozglue/baseprofiler/core/RegisteredThread.h
@@ -0,0 +1,164 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef RegisteredThread_h
+#define RegisteredThread_h
+
+#include "platform.h"
+#include "ThreadInfo.h"
+
+#include "mozilla/UniquePtr.h"
+
+namespace mozilla {
+namespace baseprofiler {
+
+// This class contains the state for a single thread that is accessible without
+// protection from gPSMutex in platform.cpp. Because there is no external
+// protection against data races, it must provide internal protection. Hence
+// the "Racy" prefix.
+//
+class RacyRegisteredThread final {
+ public:
+  explicit RacyRegisteredThread(BaseProfilerThreadId aThreadId)
+      : mThreadId(aThreadId), mSleep(AWAKE), mIsBeingProfiled(false) {}
+
+  ~RacyRegisteredThread() {}
+
+  void SetIsBeingProfiled(bool aIsBeingProfiled) {
+    mIsBeingProfiled = aIsBeingProfiled;
+  }
+
+  bool IsBeingProfiled() const { return mIsBeingProfiled; }
+
+  // This is called on every profiler restart. Put things that should happen at
+  // that time here.
+  void ReinitializeOnResume() {
+    // This is needed to cause an initial sample to be taken from sleeping
+    // threads that had been observed prior to the profiler stopping and
+    // restarting. Otherwise sleeping threads would not have any samples to
+    // copy forward while sleeping.
+    (void)mSleep.compareExchange(SLEEPING_OBSERVED, SLEEPING_NOT_OBSERVED);
+  }
+
+  // This returns true for the second and subsequent calls in each sleep cycle.
+  bool CanDuplicateLastSampleDueToSleep() {
+    if (mSleep == AWAKE) {
+      return false;
+    }
+
+    if (mSleep.compareExchange(SLEEPING_NOT_OBSERVED, SLEEPING_OBSERVED)) {
+      return false;
+    }
+
+    return true;
+  }
+
+  // Call this whenever the current thread sleeps. Calling it twice in a row
+  // without an intervening setAwake() call is an error.
+  void SetSleeping() {
+    MOZ_ASSERT(mSleep == AWAKE);
+    mSleep = SLEEPING_NOT_OBSERVED;
+  }
+
+  // Call this whenever the current thread wakes. Calling it twice in a row
+  // without an intervening setSleeping() call is an error.
+  void SetAwake() {
+    MOZ_ASSERT(mSleep != AWAKE);
+    mSleep = AWAKE;
+  }
+
+  bool IsSleeping() { return mSleep != AWAKE; }
+
+  BaseProfilerThreadId ThreadId() const { return mThreadId; }
+
+  class ProfilingStack& ProfilingStack() { return mProfilingStack; }
+  const class ProfilingStack& ProfilingStack() const { return mProfilingStack; }
+
+ private:
+  class ProfilingStack mProfilingStack;
+
+  // mThreadId contains the thread ID of the current thread. It is safe to read
+  // this from multiple threads concurrently, as it will never be mutated.
+  const BaseProfilerThreadId mThreadId;
+
+  // mSleep tracks whether the thread is sleeping, and if so, whether it has
+  // been previously observed. This is used for an optimization: in some cases,
+  // when a thread is asleep, we duplicate the previous sample, which is
+  // cheaper than taking a new sample.
+  //
+  // mSleep is atomic because it is accessed from multiple threads.
+  //
+  // - It is written only by this thread, via setSleeping() and setAwake().
+  //
+  // - It is read by SamplerThread::Run().
+  //
+  // There are two cases where racing between threads can cause an issue.
+  //
+  // - If CanDuplicateLastSampleDueToSleep() returns false but that result is
+  //   invalidated before being acted upon, we will take a full sample
+  //   unnecessarily. This is additional work but won't cause any correctness
+  //   issues. (In actual fact, this case is impossible. In order to go from
+  //   CanDuplicateLastSampleDueToSleep() returning false to it returning true
+  //   requires an intermediate call to it in order for mSleep to go from
+  //   SLEEPING_NOT_OBSERVED to SLEEPING_OBSERVED.)
+  //
+  // - If CanDuplicateLastSampleDueToSleep() returns true but that result is
+  //   invalidated before being acted upon -- i.e. the thread wakes up before
+  //   DuplicateLastSample() is called -- we will duplicate the previous
+  //   sample. This is inaccurate, but only slightly... we will effectively
+  //   treat the thread as having slept a tiny bit longer than it really did.
+  //
+  // This latter inaccuracy could be avoided by moving the
+  // CanDuplicateLastSampleDueToSleep() check within the thread-freezing code,
+  // e.g. the section where Tick() is called. But that would reduce the
+  // effectiveness of the optimization because more code would have to be run
+  // before we can tell that duplication is allowed.
+  //
+  static const int AWAKE = 0;
+  static const int SLEEPING_NOT_OBSERVED = 1;
+  static const int SLEEPING_OBSERVED = 2;
+  Atomic<int> mSleep;
+
+  // Is this thread being profiled? (e.g., should markers be recorded?)
+  Atomic<bool, MemoryOrdering::Relaxed> mIsBeingProfiled;
+};
+
+// This class contains information that's relevant to a single thread only
+// while that thread is running and registered with the profiler, but
+// regardless of whether the profiler is running. All accesses to it are
+// protected by the profiler state lock.
+class RegisteredThread final {
+ public:
+  RegisteredThread(ThreadInfo* aInfo, void* aStackTop);
+  ~RegisteredThread();
+
+  class RacyRegisteredThread& RacyRegisteredThread() {
+    return mRacyRegisteredThread;
+  }
+  const class RacyRegisteredThread& RacyRegisteredThread() const {
+    return mRacyRegisteredThread;
+  }
+
+  PlatformData* GetPlatformData() const { return mPlatformData.get(); }
+  const void* StackTop() const { return mStackTop; }
+
+  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const;
+
+  const RefPtr<ThreadInfo> Info() const { return mThreadInfo; }
+
+ private:
+  class RacyRegisteredThread mRacyRegisteredThread;
+
+  const UniquePlatformData mPlatformData;
+  const void* mStackTop;
+
+  const RefPtr<ThreadInfo> mThreadInfo;
+};
+
+}  // namespace baseprofiler
+}  // namespace mozilla
+
+#endif  // RegisteredThread_h
diff --git a/mozglue/baseprofiler/core/ThreadInfo.h b/mozglue/baseprofiler/core/ThreadInfo.h
new file mode 100644
index 0000000000..80211396ac
--- /dev/null
+++ b/mozglue/baseprofiler/core/ThreadInfo.h
@@ -0,0 +1,62 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef ThreadInfo_h
+#define ThreadInfo_h
+
+#include "mozilla/Atomics.h"
+#include "mozilla/BaseProfilerUtils.h"
+#include "mozilla/TimeStamp.h"
+
+namespace mozilla {
+namespace baseprofiler {
+
+// This class contains information about a thread which needs to be stored
+// across restarts of the profiler and which can be useful even after the
+// thread has stopped running.
+// It uses threadsafe refcounting and only contains immutable data.
+class ThreadInfo final {
+ public:
+  ThreadInfo(const char* aName, BaseProfilerThreadId aThreadId,
+             bool aIsMainThread,
+             const TimeStamp& aRegisterTime = TimeStamp::Now())
+      : mName(aName),
+        mRegisterTime(aRegisterTime),
+        mThreadId(aThreadId),
+        mIsMainThread(aIsMainThread),
+        mRefCnt(0) {
+    MOZ_ASSERT(aThreadId.IsSpecified(),
+               "Given aThreadId should not be unspecified");
+  }
+
+  // Using hand-rolled ref-counting, because RefCounted.h macros don't produce
+  // the same code between mozglue and libxul, see bug 1536656.
+  MFBT_API void AddRef() const { ++mRefCnt; }
+  MFBT_API void Release() const {
+    MOZ_ASSERT(int32_t(mRefCnt) > 0);
+    if (--mRefCnt == 0) {
+      delete this;
+    }
+  }
+
+  const char* Name() const { return mName.c_str(); }
+  TimeStamp RegisterTime() const { return mRegisterTime; }
+  BaseProfilerThreadId ThreadId() const { return mThreadId; }
+  bool IsMainThread() const { return mIsMainThread; }
+
+ private:
+  const std::string mName;
+  const TimeStamp mRegisterTime;
+  const BaseProfilerThreadId mThreadId;
+  const bool mIsMainThread;
+
+  mutable Atomic<int32_t, MemoryOrdering::ReleaseAcquire> mRefCnt;
+};
+
+}  // namespace baseprofiler
+}  // namespace mozilla
+
+#endif  // ThreadInfo_h
diff --git a/mozglue/baseprofiler/core/VTuneProfiler.cpp b/mozglue/baseprofiler/core/VTuneProfiler.cpp
new file mode 100644
index 0000000000..2911c39f08
--- /dev/null
+++ b/mozglue/baseprofiler/core/VTuneProfiler.cpp
@@ -0,0 +1,92 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifdef XP_WIN
+#  undef UNICODE
+#  undef _UNICODE
+#endif
+
+#include "VTuneProfiler.h"
+
+#include <memory>
+
+#include "BaseProfiler.h"
+
+namespace mozilla {
+namespace baseprofiler {
+
+VTuneProfiler* VTuneProfiler::mInstance = nullptr;
+
+void VTuneProfiler::Initialize() {
+  // This is just a 'dirty trick' to find out if the ittnotify DLL was found.
+  // If it wasn't this function always returns 0, otherwise it returns
+  // incrementing numbers, if the library was found this wastes 2 events but
+  // that should be okay.
+  // TODO re-implement here if vtune is needed
+  // __itt_event testEvent =
+  //     __itt_event_create("Test event", strlen("Test event"));
+  // testEvent = __itt_event_create("Test event 2", strlen("Test event 2"));
+
+  // if (testEvent) {
+  //   mInstance = new VTuneProfiler();
+  // }
+}
+
+void VTuneProfiler::Shutdown() {}
+
+void VTuneProfiler::TraceInternal(const char* aName, TracingKind aKind) {
+  // TODO re-implement here if vtune is needed
+  // std::string str(aName);
+
+  // auto iter = mStrings.find(str);
+
+  // __itt_event event;
+  // if (iter != mStrings.end()) {
+  //   event = iter->second;
+  // } else {
+  //   event = __itt_event_create(aName, str.length());
+  //   mStrings.insert({str, event});
+  // }
+
+  // if (aKind == TRACING_INTERVAL_START || aKind == TRACING_EVENT) {
+  //   // VTune will consider starts not matched with an end to be single point
+  //   in
+  //   // time events.
+  //   __itt_event_start(event);
+  // } else {
+  //   __itt_event_end(event);
+  // }
+}
+
+void VTuneProfiler::RegisterThreadInternal(const char* aName) {
+  // TODO re-implement here if vtune is needed
+  // std::string str(aName);
+
+  // if (!str.compare("Main Thread (Base Profiler)")) {
+  //   // Process main thread.
+  //   switch (XRE_GetProcessType()) {
+  //     case GeckoProcessType::GeckoProcessType_Default:
+  //       __itt_thread_set_name("Main Process");
+  //       break;
+  //     case GeckoProcessType::GeckoProcessType_Content:
+  //       __itt_thread_set_name("Content Process");
+  //       break;
+  //     case GeckoProcessType::GeckoProcessType_GMPlugin:
+  //       __itt_thread_set_name("Plugin Process");
+  //       break;
+  //     case GeckoProcessType::GeckoProcessType_GPU:
+  //       __itt_thread_set_name("GPU Process");
+  //       break;
+  //     default:
+  //       __itt_thread_set_name("Unknown Process");
+  //   }
+  //   return;
+  // }
+  // __itt_thread_set_name(aName);
+}
+
+}  // namespace baseprofiler
+}  // namespace mozilla
diff --git a/mozglue/baseprofiler/core/VTuneProfiler.h b/mozglue/baseprofiler/core/VTuneProfiler.h
new file mode 100644
index 0000000000..cf94ab7242
--- /dev/null
+++ b/mozglue/baseprofiler/core/VTuneProfiler.h
@@ -0,0 +1,84 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef VTuneProfiler_h
+#define VTuneProfiler_h
+
+// The intent here is to add 0 overhead for regular users. In order to build
+// the VTune profiler code at all --enable-vtune-instrumentation needs to be
+// set as a build option. Even then, when none of the environment variables
+// is specified that allow us to find the ittnotify DLL, these functions
+// should be minimal overhead. When starting Firefox under VTune, these
+// env vars will be automatically defined, otherwise INTEL_LIBITTNOTIFY32/64
+// should be set to point at the ittnotify DLL.
+#ifndef MOZ_VTUNE_INSTRUMENTATION
+
+#  define VTUNE_INIT()
+#  define VTUNE_SHUTDOWN()
+
+#  define VTUNE_TRACING(name, kind)
+#  define VTUNE_REGISTER_THREAD(name)
+
+#else
+
+#  include "BaseProfiler.h"
+
+// This is the regular Intel header, these functions are actually defined for
+// us inside js/src/vtune by an intel C file which actually dynamically resolves
+// them to the correct DLL. Through libxul these will 'magically' resolve.
+#  include "vtune/ittnotify.h"
+
+#  include <stddef.h>
+#  include <unordered_map>
+#  include <string>
+
+namespace mozilla {
+namespace baseprofiler {
+
+class VTuneProfiler {
+ public:
+  static void Initialize();
+  static void Shutdown();
+
+  enum TracingKind {
+    TRACING_EVENT,
+    TRACING_INTERVAL_START,
+    TRACING_INTERVAL_END,
+  };
+
+  static void Trace(const char* aName, TracingKind aKind) {
+    if (mInstance) {
+      mInstance->TraceInternal(aName, aKind);
+    }
+  }
+  static void RegisterThread(const char* aName) {
+    if (mInstance) {
+      mInstance->RegisterThreadInternal(aName);
+    }
+  }
+
+ private:
+  void TraceInternal(const char* aName, TracingKind aKind);
+  void RegisterThreadInternal(const char* aName);
+
+  // This is null when the ittnotify DLL could not be found.
+  static VTuneProfiler* mInstance;
+
+  std::unordered_map<std::string, __itt_event> mStrings;
+};
+
+#  define VTUNE_INIT() VTuneProfiler::Initialize()
+#  define VTUNE_SHUTDOWN() VTuneProfiler::Shutdown()
+
+#  define VTUNE_TRACING(name, kind) VTuneProfiler::Trace(name, kind)
+#  define VTUNE_REGISTER_THREAD(name) VTuneProfiler::RegisterThread(name)
+
+}  // namespace baseprofiler
+}  // namespace mozilla
+
+#endif
+
+#endif /* VTuneProfiler_h */
diff --git a/mozglue/baseprofiler/core/platform-linux-android.cpp b/mozglue/baseprofiler/core/platform-linux-android.cpp
new file mode 100644
index 0000000000..f21b0a0b7d
--- /dev/null
+++ b/mozglue/baseprofiler/core/platform-linux-android.cpp
@@ -0,0 +1,513 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2011 The Chromium Authors. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//  * Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//  * Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in
+//    the documentation and/or other materials provided with the
+//    distribution.
+//  * Neither the name of Google, Inc. nor the names of its contributors
+//    may be used to endorse or promote products derived from this
+//    software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+
+// This file is used for both Linux and Android.
+
+#include <stdio.h>
+#include <math.h>
+
+#include <pthread.h>
+#if defined(GP_OS_freebsd)
+#  include <sys/thr.h>
+#endif
+#include <semaphore.h>
+#include <signal.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <stdlib.h>
+#include <sched.h>
+#include <ucontext.h>
+// Ubuntu Dapper requires memory pages to be marked as
+// executable. Otherwise, OS raises an exception when executing code
+// in that page.
+#include <sys/types.h>  // mmap & munmap
+#include <sys/mman.h>   // mmap & munmap
+#include <sys/stat.h>   // open
+#include <fcntl.h>      // open
+#include <unistd.h>     // sysconf
+#include <semaphore.h>
+#ifdef __GLIBC__
+#  include <execinfo.h>  // backtrace, backtrace_symbols
+#endif                   // def __GLIBC__
+#include <strings.h>     // index
+#include <errno.h>
+#include <stdarg.h>
+
+#include "prenv.h"
+#include "mozilla/PodOperations.h"
+#include "mozilla/DebugOnly.h"
+
+#include <string.h>
+#include <list>
+
+using namespace mozilla;
+
+namespace mozilla {
+namespace baseprofiler {
+
+static int64_t MicrosecondsSince1970() {
+  struct timeval tv;
+  gettimeofday(&tv, NULL);
+  return int64_t(tv.tv_sec) * 1000000 + int64_t(tv.tv_usec);
+}
+
+void* GetStackTop(void* aGuess) { return aGuess; }
+
+static void PopulateRegsFromContext(Registers& aRegs, ucontext_t* aContext) {
+  aRegs.mContext = aContext;
+  mcontext_t& mcontext = aContext->uc_mcontext;
+
+  // Extracting the sample from the context is extremely machine dependent.
+#if defined(GP_PLAT_x86_linux) || defined(GP_PLAT_x86_android)
+  aRegs.mPC = reinterpret_cast<Address>(mcontext.gregs[REG_EIP]);
+  aRegs.mSP = reinterpret_cast<Address>(mcontext.gregs[REG_ESP]);
+  aRegs.mFP = reinterpret_cast<Address>(mcontext.gregs[REG_EBP]);
+  aRegs.mEcx = reinterpret_cast<Address>(mcontext.gregs[REG_ECX]);
+  aRegs.mEdx = reinterpret_cast<Address>(mcontext.gregs[REG_EDX]);
+#elif defined(GP_PLAT_amd64_linux) || defined(GP_PLAT_amd64_android)
+  aRegs.mPC = reinterpret_cast<Address>(mcontext.gregs[REG_RIP]);
+  aRegs.mSP = reinterpret_cast<Address>(mcontext.gregs[REG_RSP]);
+  aRegs.mFP = reinterpret_cast<Address>(mcontext.gregs[REG_RBP]);
+  aRegs.mR10 = reinterpret_cast<Address>(mcontext.gregs[REG_R10]);
+  aRegs.mR12 = reinterpret_cast<Address>(mcontext.gregs[REG_R12]);
+#elif defined(GP_PLAT_amd64_freebsd)
+  aRegs.mPC = reinterpret_cast<Address>(mcontext.mc_rip);
+  aRegs.mSP = reinterpret_cast<Address>(mcontext.mc_rsp);
+  aRegs.mFP = reinterpret_cast<Address>(mcontext.mc_rbp);
+  aRegs.mR10 = reinterpret_cast<Address>(mcontext.mc_r10);
+  aRegs.mR12 = reinterpret_cast<Address>(mcontext.mc_r12);
+#elif defined(GP_PLAT_arm_linux) || defined(GP_PLAT_arm_android)
+  aRegs.mPC = reinterpret_cast<Address>(mcontext.arm_pc);
+  aRegs.mSP = reinterpret_cast<Address>(mcontext.arm_sp);
+  aRegs.mFP = reinterpret_cast<Address>(mcontext.arm_fp);
+  aRegs.mLR = reinterpret_cast<Address>(mcontext.arm_lr);
+  aRegs.mR7 = reinterpret_cast<Address>(mcontext.arm_r7);
+#elif defined(GP_PLAT_arm64_linux) || defined(GP_PLAT_arm64_android)
+  aRegs.mPC = reinterpret_cast<Address>(mcontext.pc);
+  aRegs.mSP = reinterpret_cast<Address>(mcontext.sp);
+  aRegs.mFP = reinterpret_cast<Address>(mcontext.regs[29]);
+  aRegs.mLR = reinterpret_cast<Address>(mcontext.regs[30]);
+  aRegs.mR11 = reinterpret_cast<Address>(mcontext.regs[11]);
+#elif defined(GP_PLAT_arm64_freebsd)
+  aRegs.mPC = reinterpret_cast<Address>(mcontext.mc_gpregs.gp_elr);
+  aRegs.mSP = reinterpret_cast<Address>(mcontext.mc_gpregs.gp_sp);
+  aRegs.mFP = reinterpret_cast<Address>(mcontext.mc_gpregs.gp_x[29]);
+  aRegs.mLR = reinterpret_cast<Address>(mcontext.mc_gpregs.gp_lr);
+  aRegs.mR11 = reinterpret_cast<Address>(mcontext.mc_gpregs.gp_x[11]);
+#elif defined(GP_PLAT_mips64_linux) || defined(GP_PLAT_mips64_android)
+  aRegs.mPC = reinterpret_cast<Address>(mcontext.pc);
+  aRegs.mSP = reinterpret_cast<Address>(mcontext.gregs[29]);
+  aRegs.mFP = reinterpret_cast<Address>(mcontext.gregs[30]);
+
+#else
+#  error "bad platform"
+#endif
+}
+
+#if defined(GP_OS_android)
+#  define SYS_tgkill __NR_tgkill
+#endif
+
+#if defined(GP_OS_linux) || defined(GP_OS_android)
+int tgkill(pid_t tgid, pid_t tid, int signalno) {
+  return syscall(SYS_tgkill, tgid, tid, signalno);
+}
+#endif
+
+#if defined(GP_OS_freebsd)
+#  define tgkill thr_kill2
+#endif
+
+class PlatformData {
+ public:
+  explicit PlatformData(BaseProfilerThreadId aThreadId) {}
+
+  ~PlatformData() {}
+};
+
+////////////////////////////////////////////////////////////////////////
+// BEGIN Sampler target specifics
+
+// The only way to reliably interrupt a Linux thread and inspect its register
+// and stack state is by sending a signal to it, and doing the work inside the
+// signal handler.  But we don't want to run much code inside the signal
+// handler, since POSIX severely restricts what we can do in signal handlers.
+// So we use a system of semaphores to suspend the thread and allow the
+// sampler thread to do all the work of unwinding and copying out whatever
+// data it wants.
+//
+// A four-message protocol is used to reliably suspend and later resume the
+// thread to be sampled (the samplee):
+//
+// Sampler (signal sender) thread              Samplee (thread to be sampled)
+//
+// Prepare the SigHandlerCoordinator
+// and point sSigHandlerCoordinator at it
+//
+// send SIGPROF to samplee ------- MSG 1 ----> (enter signal handler)
+// wait(mMessage2)                             Copy register state
+//                                               into sSigHandlerCoordinator
+//                         <------ MSG 2 ----- post(mMessage2)
+// Samplee is now suspended.                   wait(mMessage3)
+//   Examine its stack/register
+//   state at leisure
+//
+// Release samplee:
+//   post(mMessage3)       ------- MSG 3 ----->
+// wait(mMessage4)                              Samplee now resumes.  Tell
+//                                                the sampler that we are done.
+//                         <------ MSG 4 ------ post(mMessage4)
+// Now we know the samplee's signal             (leave signal handler)
+//   handler has finished using
+//   sSigHandlerCoordinator.  We can
+//   safely reuse it for some other thread.
+//
+
+// A type used to coordinate between the sampler (signal sending) thread and
+// the thread currently being sampled (the samplee, which receives the
+// signals).
+//
+// The first message is sent using a SIGPROF signal delivery.  The subsequent
+// three are sent using sem_wait/sem_post pairs.  They are named accordingly
+// in the following struct.
+struct SigHandlerCoordinator {
+  SigHandlerCoordinator() {
+    PodZero(&mUContext);
+    int r = sem_init(&mMessage2, /* pshared */ 0, 0);
+    r |= sem_init(&mMessage3, /* pshared */ 0, 0);
+    r |= sem_init(&mMessage4, /* pshared */ 0, 0);
+    MOZ_ASSERT(r == 0);
+    (void)r;
+  }
+
+  ~SigHandlerCoordinator() {
+    int r = sem_destroy(&mMessage2);
+    r |= sem_destroy(&mMessage3);
+    r |= sem_destroy(&mMessage4);
+    MOZ_ASSERT(r == 0);
+    (void)r;
+  }
+
+  sem_t mMessage2;       // To sampler: "context is in sSigHandlerCoordinator"
+  sem_t mMessage3;       // To samplee: "resume"
+  sem_t mMessage4;       // To sampler: "finished with sSigHandlerCoordinator"
+  ucontext_t mUContext;  // Context at signal
+};
+
+struct SigHandlerCoordinator* Sampler::sSigHandlerCoordinator = nullptr;
+
+static void SigprofHandler(int aSignal, siginfo_t* aInfo, void* aContext) {
+  // Avoid TSan warning about clobbering errno.
+  int savedErrno = errno;
+
+  MOZ_ASSERT(aSignal == SIGPROF);
+  MOZ_ASSERT(Sampler::sSigHandlerCoordinator);
+
+  // By sending us this signal, the sampler thread has sent us message 1 in
+  // the comment above, with the meaning "|sSigHandlerCoordinator| is ready
+  // for use, please copy your register context into it."
+  Sampler::sSigHandlerCoordinator->mUContext =
+      *static_cast<ucontext_t*>(aContext);
+
+  // Send message 2: tell the sampler thread that the context has been copied
+  // into |sSigHandlerCoordinator->mUContext|.  sem_post can never fail by
+  // being interrupted by a signal, so there's no loop around this call.
+  int r = sem_post(&Sampler::sSigHandlerCoordinator->mMessage2);
+  MOZ_ASSERT(r == 0);
+
+  // At this point, the sampler thread assumes we are suspended, so we must
+  // not touch any global state here.
+
+  // Wait for message 3: the sampler thread tells us to resume.
+  while (true) {
+    r = sem_wait(&Sampler::sSigHandlerCoordinator->mMessage3);
+    if (r == -1 && errno == EINTR) {
+      // Interrupted by a signal.  Try again.
+      continue;
+    }
+    // We don't expect any other kind of failure
+    MOZ_ASSERT(r == 0);
+    break;
+  }
+
+  // Send message 4: tell the sampler thread that we are finished accessing
+  // |sSigHandlerCoordinator|.  After this point it is not safe to touch
+  // |sSigHandlerCoordinator|.
+  r = sem_post(&Sampler::sSigHandlerCoordinator->mMessage4);
+  MOZ_ASSERT(r == 0);
+
+  errno = savedErrno;
+}
+
+Sampler::Sampler(PSLockRef aLock) : mMyPid(profiler_current_process_id()) {
+#if defined(USE_EHABI_STACKWALK)
+  EHABIStackWalkInit();
+#endif
+
+  // NOTE: We don't initialize LUL here, instead initializing it in
+  // SamplerThread's constructor. This is because with the
+  // profiler_suspend_and_sample_thread entry point, we want to be able to
+  // sample without waiting for LUL to be initialized.
+
+  // Request profiling signals.
+  struct sigaction sa;
+  sa.sa_sigaction = SigprofHandler;
+  sigemptyset(&sa.sa_mask);
+  sa.sa_flags = SA_RESTART | SA_SIGINFO;
+  if (sigaction(SIGPROF, &sa, &mOldSigprofHandler) != 0) {
+    MOZ_CRASH("Error installing SIGPROF handler in the profiler");
+  }
+}
+
+void Sampler::Disable(PSLockRef aLock) {
+  // Restore old signal handler. This is global state so it's important that
+  // we do it now, while gPSMutex is locked.
+  sigaction(SIGPROF, &mOldSigprofHandler, 0);
+}
+
+template <typename Func>
+void Sampler::SuspendAndSampleAndResumeThread(
+    PSLockRef aLock, const RegisteredThread& aRegisteredThread,
+    const TimeStamp& aNow, const Func& aProcessRegs) {
+  // Only one sampler thread can be sampling at once.  So we expect to have
+  // complete control over |sSigHandlerCoordinator|.
+  MOZ_ASSERT(!sSigHandlerCoordinator);
+
+  if (!mSamplerTid.IsSpecified()) {
+    mSamplerTid = profiler_current_thread_id();
+  }
+  BaseProfilerThreadId sampleeTid = aRegisteredThread.Info()->ThreadId();
+  MOZ_RELEASE_ASSERT(sampleeTid != mSamplerTid);
+
+  //----------------------------------------------------------------//
+  // Suspend the samplee thread and get its context.
+
+  SigHandlerCoordinator coord;  // on sampler thread's stack
+  sSigHandlerCoordinator = &coord;
+
+  // Send message 1 to the samplee (the thread to be sampled), by
+  // signalling at it.
+  // This could fail if the thread doesn't exist anymore.
+  int r = tgkill(mMyPid.ToNumber(), sampleeTid.ToNumber(), SIGPROF);
+  if (r == 0) {
+    // Wait for message 2 from the samplee, indicating that the context
+    // is available and that the thread is suspended.
+    while (true) {
+      r = sem_wait(&sSigHandlerCoordinator->mMessage2);
+      if (r == -1 && errno == EINTR) {
+        // Interrupted by a signal.  Try again.
+        continue;
+      }
+      // We don't expect any other kind of failure.
+      MOZ_ASSERT(r == 0);
+      break;
+    }
+
+    //----------------------------------------------------------------//
+    // Sample the target thread.
+
+    // WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
+    //
+    // The profiler's "critical section" begins here.  In the critical section,
+    // we must not do any dynamic memory allocation, nor try to acquire any lock
+    // or any other unshareable resource.  This is because the thread to be
+    // sampled has been suspended at some entirely arbitrary point, and we have
+    // no idea which unsharable resources (locks, essentially) it holds.  So any
+    // attempt to acquire any lock, including the implied locks used by the
+    // malloc implementation, risks deadlock.  This includes TimeStamp::Now(),
+    // which gets a lock on Windows.
+
+    // The samplee thread is now frozen and sSigHandlerCoordinator->mUContext is
+    // valid.  We can poke around in it and unwind its stack as we like.
+
+    // Extract the current register values.
+    Registers regs;
+    PopulateRegsFromContext(regs, &sSigHandlerCoordinator->mUContext);
+    aProcessRegs(regs, aNow);
+
+    //----------------------------------------------------------------//
+    // Resume the target thread.
+
+    // Send message 3 to the samplee, which tells it to resume.
+    r = sem_post(&sSigHandlerCoordinator->mMessage3);
+    MOZ_ASSERT(r == 0);
+
+    // Wait for message 4 from the samplee, which tells us that it has
+    // finished with |sSigHandlerCoordinator|.
+    while (true) {
+      r = sem_wait(&sSigHandlerCoordinator->mMessage4);
+      if (r == -1 && errno == EINTR) {
+        continue;
+      }
+      MOZ_ASSERT(r == 0);
+      break;
+    }
+
+    // The profiler's critical section ends here.  After this point, none of the
+    // critical section limitations documented above apply.
+    //
+    // WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
+  }
+
+  // This isn't strictly necessary, but doing so does help pick up anomalies
+  // in which the signal handler is running when it shouldn't be.
+  sSigHandlerCoordinator = nullptr;
+}
+
+// END Sampler target specifics
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+// BEGIN SamplerThread target specifics
+
+static void* ThreadEntry(void* aArg) {
+  auto thread = static_cast<SamplerThread*>(aArg);
+  thread->Run();
+  return nullptr;
+}
+
+SamplerThread::SamplerThread(PSLockRef aLock, uint32_t aActivityGeneration,
+                             double aIntervalMilliseconds, uint32_t aFeatures)
+    : mSampler(aLock),
+      mActivityGeneration(aActivityGeneration),
+      mIntervalMicroseconds(
+          std::max(1, int(floor(aIntervalMilliseconds * 1000 + 0.5)))) {
+#if defined(USE_LUL_STACKWALK)
+  lul::LUL* lul = CorePS::Lul(aLock);
+  if (!lul && ProfilerFeature::HasStackWalkEnabled(aFeatures)) {
+    CorePS::SetLul(aLock, MakeUnique<lul::LUL>(logging_sink_for_LUL));
+    // Read all the unwind info currently available.
+    lul = CorePS::Lul(aLock);
+    read_procmaps(lul);
+
+    // Switch into unwind mode. After this point, we can't add or remove any
+    // unwind info to/from this LUL instance. The only thing we can do with
+    // it is Unwind() calls.
+    lul->EnableUnwinding();
+
+    // Has a test been requested?
+    if (getenv("MOZ_PROFILER_LUL_TEST")) {
+      int nTests = 0, nTestsPassed = 0;
+      RunLulUnitTests(&nTests, &nTestsPassed, lul);
+    }
+  }
+#endif
+
+  // Start the sampling thread. It repeatedly sends a SIGPROF signal. Sending
+  // the signal ourselves instead of relying on itimer provides much better
+  // accuracy.
+  if (pthread_create(&mThread, nullptr, ThreadEntry, this) != 0) {
+    MOZ_CRASH("pthread_create failed");
+  }
+}
+
+SamplerThread::~SamplerThread() { pthread_join(mThread, nullptr); }
+
+void SamplerThread::SleepMicro(uint32_t aMicroseconds) {
+  if (aMicroseconds >= 1000000) {
+    // Use usleep for larger intervals, because the nanosleep
+    // code below only supports intervals < 1 second.
+    MOZ_ALWAYS_TRUE(!::usleep(aMicroseconds));
+    return;
+  }
+
+  struct timespec ts;
+  ts.tv_sec = 0;
+  ts.tv_nsec = aMicroseconds * 1000UL;
+
+  int rv = ::nanosleep(&ts, &ts);
+
+  while (rv != 0 && errno == EINTR) {
+    // Keep waiting in case of interrupt.
+    // nanosleep puts the remaining time back into ts.
+    rv = ::nanosleep(&ts, &ts);
+  }
+
+  MOZ_ASSERT(!rv, "nanosleep call failed");
+}
+
+void SamplerThread::Stop(PSLockRef aLock) {
+  // Restore old signal handler. This is global state so it's important that
+  // we do it now, while gPSMutex is locked. It's safe to do this now even
+  // though this SamplerThread is still alive, because the next time the main
+  // loop of Run() iterates it won't get past the mActivityGeneration check,
+  // and so won't send any signals.
+  mSampler.Disable(aLock);
+}
+
+// END SamplerThread target specifics
+////////////////////////////////////////////////////////////////////////
+
+#if defined(GP_OS_linux) || defined(GP_OS_freebsd)
+
+// We use pthread_atfork() to temporarily disable signal delivery during any
+// fork() call. Without that, fork() can be repeatedly interrupted by signal
+// delivery, requiring it to be repeatedly restarted, which can lead to *long*
+// delays. See bug 837390.
+//
+// We provide no paf_child() function to run in the child after forking. This
+// is fine because we always immediately exec() after fork(), and exec()
+// clobbers all process state. Also, we don't want the sampler to resume in the
+// child process between fork() and exec(), it would be wasteful.
+//
+// Unfortunately all this is only doable on non-Android because Bionic doesn't
+// have pthread_atfork.
+
+// In the parent, before the fork, increase gSkipSampling to ensure that
+// profiler sampling loops will be skipped. There could be one in progress now,
+// causing a small delay, but further sampling will be skipped, allowing `fork`
+// to complete.
+static void paf_prepare() { ++gSkipSampling; }
+
+// In the parent, after the fork, decrease gSkipSampling to let the sampler
+// resume sampling (unless other places have made it non-zero as well).
+static void paf_parent() { --gSkipSampling; }
+
+static void PlatformInit(PSLockRef aLock) {
+  // Set up the fork handlers.
+  pthread_atfork(paf_prepare, paf_parent, nullptr);
+}
+
+#else
+
+static void PlatformInit(PSLockRef aLock) {}
+
+#endif
+
+#if defined(HAVE_NATIVE_UNWIND)
+// TODO port getcontext from breakpad, if profiler_get_backtrace is needed.
+#  define REGISTERS_SYNC_POPULATE(regs) \
+    MOZ_CRASH("profiler_get_backtrace() unsupported");
+#endif
+
+}  // namespace baseprofiler
+}  // namespace mozilla
diff --git a/mozglue/baseprofiler/core/platform-macos.cpp b/mozglue/baseprofiler/core/platform-macos.cpp
new file mode 100644
index 0000000000..87ce3eedeb
--- /dev/null
+++ b/mozglue/baseprofiler/core/platform-macos.cpp
@@ -0,0 +1,221 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <unistd.h>
+#include <sys/mman.h>
+#include <mach/mach_init.h>
+#include <mach-o/getsect.h>
+
+#include <AvailabilityMacros.h>
+
+#include <pthread.h>
+#include <semaphore.h>
+#include <signal.h>
+#include <libkern/OSAtomic.h>
+#include <mach/mach.h>
+#include <mach/semaphore.h>
+#include <mach/task.h>
+#include <mach/thread_act.h>
+#include <mach/vm_statistics.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <math.h>
+
+// this port is based off of v8 svn revision 9837
+
+namespace mozilla {
+namespace baseprofiler {
+
+static int64_t MicrosecondsSince1970() {
+  struct timeval tv;
+  gettimeofday(&tv, NULL);
+  return int64_t(tv.tv_sec) * 1000000 + int64_t(tv.tv_usec);
+}
+
+void* GetStackTop(void* aGuess) {
+  pthread_t thread = pthread_self();
+  return pthread_get_stackaddr_np(thread);
+}
+
+class PlatformData {
+ public:
+  explicit PlatformData(BaseProfilerThreadId aThreadId)
+      : mProfiledThread(mach_thread_self()) {}
+
+  ~PlatformData() {
+    // Deallocate Mach port for thread.
+    mach_port_deallocate(mach_task_self(), mProfiledThread);
+  }
+
+  thread_act_t ProfiledThread() { return mProfiledThread; }
+
+ private:
+  // Note: for mProfiledThread Mach primitives are used instead of pthread's
+  // because the latter doesn't provide thread manipulation primitives required.
+  // For details, consult "Mac OS X Internals" book, Section 7.3.
+  thread_act_t mProfiledThread;
+};
+
+////////////////////////////////////////////////////////////////////////
+// BEGIN Sampler target specifics
+
+Sampler::Sampler(PSLockRef aLock) {}
+
+void Sampler::Disable(PSLockRef aLock) {}
+
+template <typename Func>
+void Sampler::SuspendAndSampleAndResumeThread(
+    PSLockRef aLock, const RegisteredThread& aRegisteredThread,
+    const TimeStamp& aNow, const Func& aProcessRegs) {
+  thread_act_t samplee_thread =
+      aRegisteredThread.GetPlatformData()->ProfiledThread();
+
+  //----------------------------------------------------------------//
+  // Suspend the samplee thread and get its context.
+
+  // We're using thread_suspend on OS X because pthread_kill (which is what we
+  // at one time used on Linux) has less consistent performance and causes
+  // strange crashes, see bug 1166778 and bug 1166808.  thread_suspend
+  // is also just a lot simpler to use.
+
+  if (KERN_SUCCESS != thread_suspend(samplee_thread)) {
+    return;
+  }
+
+  //----------------------------------------------------------------//
+  // Sample the target thread.
+
+  // WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
+  //
+  // The profiler's "critical section" begins here.  We must be very careful
+  // what we do here, or risk deadlock.  See the corresponding comment in
+  // platform-linux-android.cpp for details.
+
+#if defined(__x86_64__)
+  thread_state_flavor_t flavor = x86_THREAD_STATE64;
+  x86_thread_state64_t state;
+  mach_msg_type_number_t count = x86_THREAD_STATE64_COUNT;
+#  if __DARWIN_UNIX03
+#    define REGISTER_FIELD(name) __r##name
+#  else
+#    define REGISTER_FIELD(name) r##name
+#  endif  // __DARWIN_UNIX03
+#elif defined(__aarch64__)
+  thread_state_flavor_t flavor = ARM_THREAD_STATE64;
+  arm_thread_state64_t state;
+  mach_msg_type_number_t count = ARM_THREAD_STATE64_COUNT;
+#  if __DARWIN_UNIX03
+#    define REGISTER_FIELD(name) __##name
+#  else
+#    define REGISTER_FIELD(name) name
+#  endif  // __DARWIN_UNIX03
+#else
+#  error "unknown architecture"
+#endif
+
+  if (thread_get_state(samplee_thread, flavor,
+                       reinterpret_cast<natural_t*>(&state),
+                       &count) == KERN_SUCCESS) {
+    Registers regs;
+#if defined(__x86_64__)
+    regs.mPC = reinterpret_cast<Address>(state.REGISTER_FIELD(ip));
+    regs.mSP = reinterpret_cast<Address>(state.REGISTER_FIELD(sp));
+    regs.mFP = reinterpret_cast<Address>(state.REGISTER_FIELD(bp));
+    regs.mR10 = reinterpret_cast<Address>(state.REGISTER_FIELD(10));
+    regs.mR12 = reinterpret_cast<Address>(state.REGISTER_FIELD(12));
+#elif defined(__aarch64__)
+    regs.mPC = reinterpret_cast<Address>(state.REGISTER_FIELD(pc));
+    regs.mSP = reinterpret_cast<Address>(state.REGISTER_FIELD(sp));
+    regs.mFP = reinterpret_cast<Address>(state.REGISTER_FIELD(fp));
+    regs.mLR = reinterpret_cast<Address>(state.REGISTER_FIELD(lr));
+    regs.mR11 = reinterpret_cast<Address>(state.REGISTER_FIELD(x[11]));
+#else
+#  error "unknown architecture"
+#endif
+
+    aProcessRegs(regs, aNow);
+  }
+
+#undef REGISTER_FIELD
+
+  //----------------------------------------------------------------//
+  // Resume the target thread.
+
+  thread_resume(samplee_thread);
+
+  // The profiler's critical section ends here.
+  //
+  // WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
+}
+
+// END Sampler target specifics
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+// BEGIN SamplerThread target specifics
+
+static void* ThreadEntry(void* aArg) {
+  auto thread = static_cast<SamplerThread*>(aArg);
+  thread->Run();
+  return nullptr;
+}
+
+SamplerThread::SamplerThread(PSLockRef aLock, uint32_t aActivityGeneration,
+                             double aIntervalMilliseconds, uint32_t aFeatures)
+    : mSampler(aLock),
+      mActivityGeneration(aActivityGeneration),
+      mIntervalMicroseconds(
+          std::max(1, int(floor(aIntervalMilliseconds * 1000 + 0.5)))),
+      mThread{nullptr} {
+  pthread_attr_t* attr_ptr = nullptr;
+  if (pthread_create(&mThread, attr_ptr, ThreadEntry, this) != 0) {
+    MOZ_CRASH("pthread_create failed");
+  }
+}
+
+SamplerThread::~SamplerThread() { pthread_join(mThread, nullptr); }
+
+void SamplerThread::SleepMicro(uint32_t aMicroseconds) {
+  usleep(aMicroseconds);
+  // FIXME: the OSX 10.12 page for usleep says "The usleep() function is
+  // obsolescent.  Use nanosleep(2) instead."  This implementation could be
+  // merged with the linux-android version.  Also, this doesn't handle the
+  // case where the usleep call is interrupted by a signal.
+}
+
+void SamplerThread::Stop(PSLockRef aLock) { mSampler.Disable(aLock); }
+
+// END SamplerThread target specifics
+////////////////////////////////////////////////////////////////////////
+
+static void PlatformInit(PSLockRef aLock) {}
+
+// clang-format off
+#if defined(HAVE_NATIVE_UNWIND)
+// Derive the stack pointer from the frame pointer. The 0x10 offset is
+// 8 bytes for the previous frame pointer and 8 bytes for the return
+// address both stored on the stack after at the beginning of the current
+// frame.
+#  define REGISTERS_SYNC_POPULATE(regs)                                       \
+    regs.mSP = reinterpret_cast<Address>(__builtin_frame_address(0)) + 0x10;  \
+    _Pragma("GCC diagnostic push")                                            \
+    _Pragma("GCC diagnostic ignored \"-Wframe-address\"")                     \
+    regs.mFP = reinterpret_cast<Address>(__builtin_frame_address(1));         \
+    _Pragma("GCC diagnostic pop")                                             \
+    regs.mPC = reinterpret_cast<Address>(                                     \
+        __builtin_extract_return_addr(__builtin_return_address(0)));
+#endif
+// clang-format on
+
+}  // namespace baseprofiler
+}  // namespace mozilla
diff --git a/mozglue/baseprofiler/core/platform-win32.cpp b/mozglue/baseprofiler/core/platform-win32.cpp
new file mode 100644
index 0000000000..d2ddf1a590
--- /dev/null
+++ b/mozglue/baseprofiler/core/platform-win32.cpp
@@ -0,0 +1,297 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2011 The Chromium Authors. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//  * Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//  * Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in
+//    the documentation and/or other materials provided with the
+//    distribution.
+//  * Neither the name of Google, Inc. nor the names of its contributors
+//    may be used to endorse or promote products derived from this
+//    software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+
+#include <windows.h>
+#include <mmsystem.h>
+#include <process.h>
+
+namespace mozilla {
+namespace baseprofiler {
+
+static int64_t MicrosecondsSince1970() {
+  int64_t prt;
+  FILETIME ft;
+  SYSTEMTIME st;
+
+  GetSystemTime(&st);
+  SystemTimeToFileTime(&st, &ft);
+  static_assert(sizeof(ft) == sizeof(prt), "Expect FILETIME to be 64 bits");
+  memcpy(&prt, &ft, sizeof(prt));
+  const int64_t epochBias = 116444736000000000LL;
+  prt = (prt - epochBias) / 10;
+
+  return prt;
+}
+
+void* GetStackTop(void* aGuess) {
+  PNT_TIB pTib = reinterpret_cast<PNT_TIB>(NtCurrentTeb());
+  return reinterpret_cast<void*>(pTib->StackBase);
+}
+
+static void PopulateRegsFromContext(Registers& aRegs, CONTEXT* aContext) {
+#if defined(GP_ARCH_amd64)
+  aRegs.mPC = reinterpret_cast<Address>(aContext->Rip);
+  aRegs.mSP = reinterpret_cast<Address>(aContext->Rsp);
+  aRegs.mFP = reinterpret_cast<Address>(aContext->Rbp);
+  aRegs.mR10 = reinterpret_cast<Address>(aContext->R10);
+  aRegs.mR12 = reinterpret_cast<Address>(aContext->R12);
+#elif defined(GP_ARCH_x86)
+  aRegs.mPC = reinterpret_cast<Address>(aContext->Eip);
+  aRegs.mSP = reinterpret_cast<Address>(aContext->Esp);
+  aRegs.mFP = reinterpret_cast<Address>(aContext->Ebp);
+  aRegs.mEcx = reinterpret_cast<Address>(aContext->Ecx);
+  aRegs.mEdx = reinterpret_cast<Address>(aContext->Edx);
+#elif defined(GP_ARCH_arm64)
+  aRegs.mPC = reinterpret_cast<Address>(aContext->Pc);
+  aRegs.mSP = reinterpret_cast<Address>(aContext->Sp);
+  aRegs.mFP = reinterpret_cast<Address>(aContext->Fp);
+  aRegs.mLR = reinterpret_cast<Address>(aContext->Lr);
+  aRegs.mR11 = reinterpret_cast<Address>(aContext->X11);
+#else
+#  error "bad arch"
+#endif
+}
+
+// Gets a real (i.e. not pseudo) handle for the current thread, with the
+// permissions needed for profiling.
+// @return a real HANDLE for the current thread.
+static HANDLE GetRealCurrentThreadHandleForProfiling() {
+  HANDLE realCurrentThreadHandle;
+  if (!::DuplicateHandle(
+          ::GetCurrentProcess(), ::GetCurrentThread(), ::GetCurrentProcess(),
+          &realCurrentThreadHandle,
+          THREAD_GET_CONTEXT | THREAD_SUSPEND_RESUME | THREAD_QUERY_INFORMATION,
+          FALSE, 0)) {
+    return nullptr;
+  }
+
+  return realCurrentThreadHandle;
+}
+
+class PlatformData {
+ public:
+  // Get a handle to the calling thread. This is the thread that we are
+  // going to profile. We need a real handle because we are going to use it in
+  // the sampler thread.
+  explicit PlatformData(BaseProfilerThreadId aThreadId)
+      : mProfiledThread(GetRealCurrentThreadHandleForProfiling()) {
+    MOZ_ASSERT(DWORD(aThreadId.ToNumber()) == ::GetCurrentThreadId());
+  }
+
+  ~PlatformData() {
+    if (mProfiledThread != nullptr) {
+      CloseHandle(mProfiledThread);
+      mProfiledThread = nullptr;
+    }
+  }
+
+  HANDLE ProfiledThread() { return mProfiledThread; }
+
+ private:
+  HANDLE mProfiledThread;
+};
+
+#if defined(USE_MOZ_STACK_WALK)
+HANDLE
+GetThreadHandle(PlatformData* aData) { return aData->ProfiledThread(); }
+#endif
+
+static const HANDLE kNoThread = INVALID_HANDLE_VALUE;
+
+////////////////////////////////////////////////////////////////////////
+// BEGIN Sampler target specifics
+
+Sampler::Sampler(PSLockRef aLock) {}
+
+void Sampler::Disable(PSLockRef aLock) {}
+
+template <typename Func>
+void Sampler::SuspendAndSampleAndResumeThread(
+    PSLockRef aLock, const RegisteredThread& aRegisteredThread,
+    const TimeStamp& aNow, const Func& aProcessRegs) {
+  HANDLE profiled_thread =
+      aRegisteredThread.GetPlatformData()->ProfiledThread();
+  if (profiled_thread == nullptr) {
+    return;
+  }
+
+  // Context used for sampling the register state of the profiled thread.
+  CONTEXT context;
+  memset(&context, 0, sizeof(context));
+
+  //----------------------------------------------------------------//
+  // Suspend the samplee thread and get its context.
+
+  static const DWORD kSuspendFailed = static_cast<DWORD>(-1);
+  if (SuspendThread(profiled_thread) == kSuspendFailed) {
+    return;
+  }
+
+  // SuspendThread is asynchronous, so the thread may still be running.
+  // Call GetThreadContext first to ensure the thread is really suspended.
+  // See https://blogs.msdn.microsoft.com/oldnewthing/20150205-00/?p=44743.
+
+  // Using only CONTEXT_CONTROL is faster but on 64-bit it causes crashes in
+  // RtlVirtualUnwind (see bug 1120126) so we set all the flags.
+#if defined(GP_ARCH_amd64)
+  context.ContextFlags = CONTEXT_FULL;
+#else
+  context.ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER;
+#endif
+  if (!GetThreadContext(profiled_thread, &context)) {
+    ResumeThread(profiled_thread);
+    return;
+  }
+
+  //----------------------------------------------------------------//
+  // Sample the target thread.
+
+  // WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
+  //
+  // The profiler's "critical section" begins here.  We must be very careful
+  // what we do here, or risk deadlock.  See the corresponding comment in
+  // platform-linux-android.cpp for details.
+
+  Registers regs;
+  PopulateRegsFromContext(regs, &context);
+  aProcessRegs(regs, aNow);
+
+  //----------------------------------------------------------------//
+  // Resume the target thread.
+
+  ResumeThread(profiled_thread);
+
+  // The profiler's critical section ends here.
+  //
+  // WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
+}
+
+// END Sampler target specifics
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+// BEGIN SamplerThread target specifics
+
+static unsigned int __stdcall ThreadEntry(void* aArg) {
+  auto thread = static_cast<SamplerThread*>(aArg);
+  thread->Run();
+  return 0;
+}
+
+SamplerThread::SamplerThread(PSLockRef aLock, uint32_t aActivityGeneration,
+                             double aIntervalMilliseconds, uint32_t aFeatures)
+    : mSampler(aLock),
+      mActivityGeneration(aActivityGeneration),
+      mIntervalMicroseconds(
+          std::max(1, int(floor(aIntervalMilliseconds * 1000 + 0.5)))),
+      mNoTimerResolutionChange(
+          ProfilerFeature::HasNoTimerResolutionChange(aFeatures)) {
+  if ((!mNoTimerResolutionChange) && (mIntervalMicroseconds < 10 * 1000)) {
+    // By default the timer resolution (which tends to be 1/64Hz, around 16ms)
+    // is not changed. However, if the requested interval is sufficiently low,
+    // the resolution will be adjusted to match. Note that this affects all
+    // timers in Firefox, and could therefore hide issues while profiling. This
+    // change may be prevented with the "notimerresolutionchange" feature.
+    ::timeBeginPeriod(mIntervalMicroseconds / 1000);
+  }
+
+  // Create a new thread. It is important to use _beginthreadex() instead of
+  // the Win32 function CreateThread(), because the CreateThread() does not
+  // initialize thread-specific structures in the C runtime library.
+  mThread = reinterpret_cast<HANDLE>(_beginthreadex(nullptr,
+                                                    /* stack_size */ 0,
+                                                    ThreadEntry, this,
+                                                    /* initflag */ 0, nullptr));
+  if (mThread == 0) {
+    MOZ_CRASH("_beginthreadex failed");
+  }
+}
+
+SamplerThread::~SamplerThread() {
+  WaitForSingleObject(mThread, INFINITE);
+
+  // Close our own handle for the thread.
+  if (mThread != kNoThread) {
+    CloseHandle(mThread);
+  }
+}
+
+void SamplerThread::SleepMicro(uint32_t aMicroseconds) {
+  // For now, keep the old behaviour of minimum Sleep(1), even for
+  // smaller-than-usual sleeps after an overshoot, unless the user has
+  // explicitly opted into a sub-millisecond profiler interval.
+  if (mIntervalMicroseconds >= 1000) {
+    ::Sleep(std::max(1u, aMicroseconds / 1000));
+  } else {
+    TimeStamp start = TimeStamp::Now();
+    TimeStamp end = start + TimeDuration::FromMicroseconds(aMicroseconds);
+
+    // First, sleep for as many whole milliseconds as possible.
+    if (aMicroseconds >= 1000) {
+      ::Sleep(aMicroseconds / 1000);
+    }
+
+    // Then, spin until enough time has passed.
+    while (TimeStamp::Now() < end) {
+      YieldProcessor();
+    }
+  }
+}
+
+void SamplerThread::Stop(PSLockRef aLock) {
+  if ((!mNoTimerResolutionChange) && (mIntervalMicroseconds < 10 * 1000)) {
+    // Disable any timer resolution changes we've made. Do it now while
+    // gPSMutex is locked, i.e. before any other SamplerThread can be created
+    // and call ::timeBeginPeriod().
+    //
+    // It's safe to do this now even though this SamplerThread is still alive,
+    // because the next time the main loop of Run() iterates it won't get past
+    // the mActivityGeneration check, and so it won't make any more ::Sleep()
+    // calls.
+    ::timeEndPeriod(mIntervalMicroseconds / 1000);
+  }
+
+  mSampler.Disable(aLock);
+}
+
+// END SamplerThread target specifics
+////////////////////////////////////////////////////////////////////////
+
+static void PlatformInit(PSLockRef aLock) {}
+
+#if defined(HAVE_NATIVE_UNWIND)
+#  define REGISTERS_SYNC_POPULATE(regs) \
+    CONTEXT context;                    \
+    RtlCaptureContext(&context);        \
+    PopulateRegsFromContext(regs, &context);
+#endif
+
+}  // namespace baseprofiler
+}  // namespace mozilla
diff --git a/mozglue/baseprofiler/core/platform.cpp b/mozglue/baseprofiler/core/platform.cpp
new file mode 100644
index 0000000000..4f69aadd4a
--- /dev/null
+++ b/mozglue/baseprofiler/core/platform.cpp
@@ -0,0 +1,3830 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// There are three kinds of samples done by the profiler.
+//
+// - A "periodic" sample is the most complex kind. It is done in response to a
+//   timer while the profiler is active. It involves writing a stack trace plus
+//   a variety of other values (memory measurements, responsiveness
+//   measurements, etc.) into the main ProfileBuffer. The sampling is done from
+//   off-thread, and so SuspendAndSampleAndResumeThread() is used to get the
+//   register values.
+//
+// - A "synchronous" sample is a simpler kind. It is done in response to an API
+//   call (profiler_get_backtrace()). It involves writing a stack trace and
+//   little else into a temporary ProfileBuffer, and wrapping that up in a
+//   ProfilerBacktrace that can be subsequently used in a marker. The sampling
+//   is done on-thread, and so REGISTERS_SYNC_POPULATE() is used to get the
+//   register values.
+//
+// - A "backtrace" sample is the simplest kind. It is done in response to an
+//   API call (profiler_suspend_and_sample_thread()). It involves getting a
+//   stack trace via a ProfilerStackCollector; it does not write to a
+//   ProfileBuffer. The sampling is done from off-thread, and so uses
+//   SuspendAndSampleAndResumeThread() to get the register values.
+
+#include "platform.h"
+
+#include <algorithm>
+#include <errno.h>
+#include <fstream>
+#include <ostream>
+#include <set>
+#include <sstream>
+#include <string_view>
+
+// #include "memory_hooks.h"
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/AutoProfilerLabel.h"
+#include "mozilla/BaseAndGeckoProfilerDetail.h"
+#include "mozilla/BaseProfilerDetail.h"
+#include "mozilla/DoubleConversion.h"
+#include "mozilla/Printf.h"
+#include "mozilla/ProfilerBufferSize.h"
+#include "mozilla/ProfileBufferChunkManagerSingle.h"
+#include "mozilla/ProfileBufferChunkManagerWithLocalLimit.h"
+#include "mozilla/ProfileChunkedBuffer.h"
+#include "mozilla/Services.h"
+#include "mozilla/Span.h"
+#include "mozilla/StackWalk.h"
+#ifdef XP_WIN
+#  include "mozilla/StackWalkThread.h"
+#  include "mozilla/WindowsStackWalkInitialization.h"
+#endif
+#include "mozilla/StaticPtr.h"
+#include "mozilla/ThreadLocal.h"
+#include "mozilla/TimeStamp.h"
+
+#include "mozilla/UniquePtr.h"
+#include "mozilla/Vector.h"
+#include "prdtoa.h"
+#include "prtime.h"
+
+#include "BaseProfiler.h"
+#include "BaseProfilingCategory.h"
+#include "PageInformation.h"
+#include "ProfiledThreadData.h"
+#include "ProfilerBacktrace.h"
+#include "ProfileBuffer.h"
+#include "RegisteredThread.h"
+#include "BaseProfilerSharedLibraries.h"
+#include "ThreadInfo.h"
+#include "VTuneProfiler.h"
+
+// Win32 builds always have frame pointers, so FramePointerStackWalk() always
+// works.
+#if defined(GP_PLAT_x86_windows)
+#  define HAVE_NATIVE_UNWIND
+#  define USE_FRAME_POINTER_STACK_WALK
+#endif
+
+// Win64 builds always omit frame pointers, so we use the slower
+// MozStackWalk(), which works in that case.
+#if defined(GP_PLAT_amd64_windows)
+#  define HAVE_NATIVE_UNWIND
+#  define USE_MOZ_STACK_WALK
+#endif
+
+// AArch64 Win64 doesn't seem to use frame pointers, so we use the slower
+// MozStackWalk().
+#if defined(GP_PLAT_arm64_windows)
+#  define HAVE_NATIVE_UNWIND
+#  define USE_MOZ_STACK_WALK
+#endif
+
+// Mac builds use FramePointerStackWalk(). Even if we build without
+// frame pointers, we'll still get useful stacks in system libraries
+// because those always have frame pointers.
+// We don't use MozStackWalk() on Mac.
+#if defined(GP_OS_darwin)
+#  define HAVE_NATIVE_UNWIND
+#  define USE_FRAME_POINTER_STACK_WALK
+#endif
+
+// No stack-walking in baseprofiler on linux, android, bsd.
+// APIs now make it easier to capture backtraces from the Base Profiler, which
+// is currently not supported on these platform, and would lead to a MOZ_CRASH
+// in REGISTERS_SYNC_POPULATE(). `#if 0` added in bug 1658232, follow-up bugs
+// should be referenced in meta bug 1557568.
+#if 0
+// Android builds use the ARM Exception Handling ABI to unwind.
+#  if defined(GP_PLAT_arm_linux) || defined(GP_PLAT_arm_android)
+#    define HAVE_NATIVE_UNWIND
+#    define USE_EHABI_STACKWALK
+#    include "EHABIStackWalk.h"
+#  endif
+
+// Linux/BSD builds use LUL, which uses DWARF info to unwind stacks.
+#  if defined(GP_PLAT_amd64_linux) || defined(GP_PLAT_x86_linux) ||       \
+      defined(GP_PLAT_amd64_android) || defined(GP_PLAT_x86_android) ||   \
+      defined(GP_PLAT_mips64_linux) || defined(GP_PLAT_arm64_linux) ||    \
+      defined(GP_PLAT_arm64_android) || defined(GP_PLAT_amd64_freebsd) || \
+      defined(GP_PLAT_arm64_freebsd)
+#    define HAVE_NATIVE_UNWIND
+#    define USE_LUL_STACKWALK
+#    include "lul/LulMain.h"
+#    include "lul/platform-linux-lul.h"
+
+// On linux we use LUL for periodic samples and synchronous samples, but we use
+// FramePointerStackWalk for backtrace samples when MOZ_PROFILING is enabled.
+// (See the comment at the top of the file for a definition of
+// periodic/synchronous/backtrace.).
+//
+// FramePointerStackWalk can produce incomplete stacks when the current entry is
+// in a shared library without framepointers, however LUL can take a long time
+// to initialize, which is undesirable for consumers of
+// profiler_suspend_and_sample_thread like the Background Hang Reporter.
+#    if defined(MOZ_PROFILING)
+#      define USE_FRAME_POINTER_STACK_WALK
+#    endif
+#  endif
+#endif
+
+// We can only stackwalk without expensive initialization on platforms which
+// support FramePointerStackWalk or MozStackWalk. LUL Stackwalking requires
+// initializing LUL, and EHABIStackWalk requires initializing EHABI, both of
+// which can be expensive.
+#if defined(USE_FRAME_POINTER_STACK_WALK) || defined(USE_MOZ_STACK_WALK)
+#  define HAVE_FASTINIT_NATIVE_UNWIND
+#endif
+
+#ifdef MOZ_VALGRIND
+#  include <valgrind/memcheck.h>
+#else
+#  define VALGRIND_MAKE_MEM_DEFINED(_addr, _len) ((void)0)
+#endif
+
+#if defined(GP_OS_linux) || defined(GP_OS_android) || defined(GP_OS_freebsd)
+#  include <ucontext.h>
+#endif
+
+namespace mozilla {
+namespace baseprofiler {
+
+using detail::RacyFeatures;
+
+bool LogTest(int aLevelToTest) {
+  static const int maxLevel = getenv("MOZ_BASE_PROFILER_VERBOSE_LOGGING") ? 5
+                              : getenv("MOZ_BASE_PROFILER_DEBUG_LOGGING") ? 4
+                              : getenv("MOZ_BASE_PROFILER_LOGGING")       ? 3
+                                                                          : 0;
+  return aLevelToTest <= maxLevel;
+}
+
+void PrintToConsole(const char* aFmt, ...) {
+  va_list args;
+  va_start(args, aFmt);
+#if defined(ANDROID)
+  __android_log_vprint(ANDROID_LOG_INFO, "Gecko", aFmt, args);
+#else
+  vfprintf(stderr, aFmt, args);
+#endif
+  va_end(args);
+}
+
+ProfileChunkedBuffer& profiler_get_core_buffer() {
+  // This needs its own mutex, because it is used concurrently from functions
+  // guarded by gPSMutex as well as others without safety (e.g.,
+  // profiler_add_marker). It is *not* used inside the critical section of the
+  // sampler, because mutexes cannot be used there.
+  static ProfileChunkedBuffer sProfileChunkedBuffer{
+      ProfileChunkedBuffer::ThreadSafety::WithMutex};
+  return sProfileChunkedBuffer;
+}
+
+Atomic<int, MemoryOrdering::Relaxed> gSkipSampling;
+
+constexpr static bool ValidateFeatures() {
+  int expectedFeatureNumber = 0;
+
+  // Feature numbers should start at 0 and increase by 1 each.
+#define CHECK_FEATURE(n_, str_, Name_, desc_) \
+  if ((n_) != expectedFeatureNumber) {        \
+    return false;                             \
+  }                                           \
+  ++expectedFeatureNumber;
+
+  BASE_PROFILER_FOR_EACH_FEATURE(CHECK_FEATURE)
+
+#undef CHECK_FEATURE
+
+  return true;
+}
+
+static_assert(ValidateFeatures(), "Feature list is invalid");
+
+// Return all features that are available on this platform.
+static uint32_t AvailableFeatures() {
+  uint32_t features = 0;
+
+#define ADD_FEATURE(n_, str_, Name_, desc_) \
+  ProfilerFeature::Set##Name_(features);
+
+  // Add all the possible features.
+  BASE_PROFILER_FOR_EACH_FEATURE(ADD_FEATURE)
+
+#undef ADD_FEATURE
+
+  // Now remove features not supported on this platform/configuration.
+  ProfilerFeature::ClearJava(features);
+  ProfilerFeature::ClearJS(features);
+  ProfilerFeature::ClearScreenshots(features);
+#if !defined(HAVE_NATIVE_UNWIND)
+  ProfilerFeature::ClearStackWalk(features);
+#endif
+#if !defined(GP_OS_windows)
+  ProfilerFeature::ClearNoTimerResolutionChange(features);
+#endif
+
+  return features;
+}
+
+// Default features common to all contexts (even if not available).
+static constexpr uint32_t DefaultFeatures() {
+  return ProfilerFeature::Java | ProfilerFeature::JS |
+         ProfilerFeature::StackWalk | ProfilerFeature::CPUUtilization |
+         ProfilerFeature::ProcessCPU;
+}
+
+// Extra default features when MOZ_PROFILER_STARTUP is set (even if not
+// available).
+static constexpr uint32_t StartupExtraDefaultFeatures() {
+  // Enable mainthreadio by default for startup profiles as startup is heavy on
+  // I/O operations, and main thread I/O is really important to see there.
+  return ProfilerFeature::MainThreadIO | ProfilerFeature::IPCMessages;
+}
+
+// The auto-lock/unlock mutex that guards accesses to CorePS and ActivePS.
+// Use `PSAutoLock lock;` to take the lock until the end of the enclosing block.
+// External profilers may use this same lock for their own data, but as the lock
+// is non-recursive, *only* `f(PSLockRef, ...)` functions below should be
+// called, to avoid double-locking.
+class MOZ_RAII PSAutoLock {
+ public:
+  PSAutoLock() : mLock(gPSMutex) {}
+
+  PSAutoLock(const PSAutoLock&) = delete;
+  void operator=(const PSAutoLock&) = delete;
+
+  [[nodiscard]] static bool IsLockedOnCurrentThread() {
+    return gPSMutex.IsLockedOnCurrentThread();
+  }
+
+ private:
+  static detail::BaseProfilerMutex gPSMutex;
+  detail::BaseProfilerAutoLock mLock;
+};
+
+detail::BaseProfilerMutex PSAutoLock::gPSMutex{"Base Profiler mutex"};
+
+// Only functions that take a PSLockRef arg can access CorePS's and ActivePS's
+// fields.
+typedef const PSAutoLock& PSLockRef;
+
+#define PS_GET(type_, name_)      \
+  static type_ name_(PSLockRef) { \
+    MOZ_ASSERT(sInstance);        \
+    return sInstance->m##name_;   \
+  }
+
+#define PS_GET_LOCKLESS(type_, name_) \
+  static type_ name_() {              \
+    MOZ_ASSERT(sInstance);            \
+    return sInstance->m##name_;       \
+  }
+
+#define PS_GET_AND_SET(type_, name_)                  \
+  PS_GET(type_, name_)                                \
+  static void Set##name_(PSLockRef, type_ a##name_) { \
+    MOZ_ASSERT(sInstance);                            \
+    sInstance->m##name_ = a##name_;                   \
+  }
+
+// All functions in this file can run on multiple threads unless they have an
+// NS_IsMainThread() assertion.
+
+// This class contains the profiler's core global state, i.e. that which is
+// valid even when the profiler is not active. Most profile operations can't do
+// anything useful when this class is not instantiated, so we release-assert
+// its non-nullness in all such operations.
+//
+// Accesses to CorePS are guarded by gPSMutex. Getters and setters take a
+// PSAutoLock reference as an argument as proof that the gPSMutex is currently
+// locked. This makes it clear when gPSMutex is locked and helps avoid
+// accidental unlocked accesses to global state. There are ways to circumvent
+// this mechanism, but please don't do so without *very* good reason and a
+// detailed explanation.
+//
+// The exceptions to this rule:
+//
+// - mProcessStartTime, because it's immutable;
+//
+// - each thread's RacyRegisteredThread object is accessible without locking via
+//   TLSRegisteredThread::RacyRegisteredThread().
+class CorePS {
+ private:
+  CorePS()
+      : mProcessStartTime(TimeStamp::ProcessCreation())
+#ifdef USE_LUL_STACKWALK
+        ,
+        mLul(nullptr)
+#endif
+  {
+  }
+
+  ~CorePS() {}
+
+ public:
+  static void Create(PSLockRef aLock) {
+    MOZ_ASSERT(!sInstance);
+    sInstance = new CorePS();
+  }
+
+  static void Destroy(PSLockRef aLock) {
+    MOZ_ASSERT(sInstance);
+    delete sInstance;
+    sInstance = nullptr;
+  }
+
+  // Unlike ActivePS::Exists(), CorePS::Exists() can be called without gPSMutex
+  // being locked. This is because CorePS is instantiated so early on the main
+  // thread that we don't have to worry about it being racy.
+  static bool Exists() { return !!sInstance; }
+
+  static void AddSizeOf(PSLockRef, MallocSizeOf aMallocSizeOf,
+                        size_t& aProfSize, size_t& aLulSize) {
+    MOZ_ASSERT(sInstance);
+
+    aProfSize += aMallocSizeOf(sInstance);
+
+    for (auto& registeredThread : sInstance->mRegisteredThreads) {
+      aProfSize += registeredThread->SizeOfIncludingThis(aMallocSizeOf);
+    }
+
+    for (auto& registeredPage : sInstance->mRegisteredPages) {
+      aProfSize += registeredPage->SizeOfIncludingThis(aMallocSizeOf);
+    }
+
+    // Measurement of the following things may be added later if DMD finds it
+    // is worthwhile:
+    // - CorePS::mRegisteredThreads itself (its elements' children are
+    // measured above)
+    // - CorePS::mRegisteredPages itself (its elements' children are
+    // measured above)
+    // - CorePS::mInterposeObserver
+
+#if defined(USE_LUL_STACKWALK)
+    if (sInstance->mLul) {
+      aLulSize += sInstance->mLul->SizeOfIncludingThis(aMallocSizeOf);
+    }
+#endif
+  }
+
+  // No PSLockRef is needed for this field because it's immutable.
+  PS_GET_LOCKLESS(const TimeStamp&, ProcessStartTime)
+
+  PS_GET(const Vector<UniquePtr<RegisteredThread>>&, RegisteredThreads)
+
+  static void AppendRegisteredThread(
+      PSLockRef, UniquePtr<RegisteredThread>&& aRegisteredThread) {
+    MOZ_ASSERT(sInstance);
+    MOZ_RELEASE_ASSERT(
+        sInstance->mRegisteredThreads.append(std::move(aRegisteredThread)));
+  }
+
+  static void RemoveRegisteredThread(PSLockRef,
+                                     RegisteredThread* aRegisteredThread) {
+    MOZ_ASSERT(sInstance);
+    // Remove aRegisteredThread from mRegisteredThreads.
+    for (UniquePtr<RegisteredThread>& rt : sInstance->mRegisteredThreads) {
+      if (rt.get() == aRegisteredThread) {
+        sInstance->mRegisteredThreads.erase(&rt);
+        return;
+      }
+    }
+  }
+
+  PS_GET(Vector<RefPtr<PageInformation>>&, RegisteredPages)
+
+  static void AppendRegisteredPage(PSLockRef,
+                                   RefPtr<PageInformation>&& aRegisteredPage) {
+    MOZ_ASSERT(sInstance);
+    struct RegisteredPageComparator {
+      PageInformation* aA;
+      bool operator()(PageInformation* aB) const { return aA->Equals(aB); }
+    };
+
+    auto foundPageIter = std::find_if(
+        sInstance->mRegisteredPages.begin(), sInstance->mRegisteredPages.end(),
+        RegisteredPageComparator{aRegisteredPage.get()});
+
+    if (foundPageIter != sInstance->mRegisteredPages.end()) {
+      if ((*foundPageIter)->Url() == "about:blank") {
+        // When a BrowsingContext is loaded, the first url loaded in it will be
+        // about:blank, and if the principal matches, the first document loaded
+        // in it will share an inner window. That's why we should delete the
+        // intermittent about:blank if they share the inner window.
+        sInstance->mRegisteredPages.erase(foundPageIter);
+      } else {
+        // Do not register the same page again.
+        return;
+      }
+    }
+    MOZ_RELEASE_ASSERT(
+        sInstance->mRegisteredPages.append(std::move(aRegisteredPage)));
+  }
+
+  static void RemoveRegisteredPage(PSLockRef,
+                                   uint64_t aRegisteredInnerWindowID) {
+    MOZ_ASSERT(sInstance);
+    // Remove RegisteredPage from mRegisteredPages by given inner window ID.
+    sInstance->mRegisteredPages.eraseIf([&](const RefPtr<PageInformation>& rd) {
+      return rd->InnerWindowID() == aRegisteredInnerWindowID;
+    });
+  }
+
+  static void ClearRegisteredPages(PSLockRef) {
+    MOZ_ASSERT(sInstance);
+    sInstance->mRegisteredPages.clear();
+  }
+
+  PS_GET(const Vector<BaseProfilerCount*>&, Counters)
+
+  static void AppendCounter(PSLockRef, BaseProfilerCount* aCounter) {
+    MOZ_ASSERT(sInstance);
+    // we don't own the counter; they may be stored in static objects
+    MOZ_RELEASE_ASSERT(sInstance->mCounters.append(aCounter));
+  }
+
+  static void RemoveCounter(PSLockRef, BaseProfilerCount* aCounter) {
+    // we may be called to remove a counter after the profiler is stopped or
+    // late in shutdown.
+    if (sInstance) {
+      auto* counter = std::find(sInstance->mCounters.begin(),
+                                sInstance->mCounters.end(), aCounter);
+      MOZ_RELEASE_ASSERT(counter != sInstance->mCounters.end());
+      sInstance->mCounters.erase(counter);
+    }
+  }
+
+#ifdef USE_LUL_STACKWALK
+  static lul::LUL* Lul(PSLockRef) {
+    MOZ_ASSERT(sInstance);
+    return sInstance->mLul.get();
+  }
+  static void SetLul(PSLockRef, UniquePtr<lul::LUL> aLul) {
+    MOZ_ASSERT(sInstance);
+    sInstance->mLul = std::move(aLul);
+  }
+#endif
+
+  PS_GET_AND_SET(const std::string&, ProcessName)
+  PS_GET_AND_SET(const std::string&, ETLDplus1)
+
+ private:
+  // The singleton instance
+  static CorePS* sInstance;
+
+  // The time that the process started.
+  const TimeStamp mProcessStartTime;
+
+  // Info on all the registered threads.
+  // ThreadIds in mRegisteredThreads are unique.
+  Vector<UniquePtr<RegisteredThread>> mRegisteredThreads;
+
+  // Info on all the registered pages.
+  // InnerWindowIDs in mRegisteredPages are unique.
+  Vector<RefPtr<PageInformation>> mRegisteredPages;
+
+  // Non-owning pointers to all active counters
+  Vector<BaseProfilerCount*> mCounters;
+
+#ifdef USE_LUL_STACKWALK
+  // LUL's state. Null prior to the first activation, non-null thereafter.
+  UniquePtr<lul::LUL> mLul;
+#endif
+
+  // Process name, provided by child process initialization code.
+  std::string mProcessName;
+  // Private name, provided by child process initialization code (eTLD+1 in
+  // fission)
+  std::string mETLDplus1;
+};
+
+CorePS* CorePS::sInstance = nullptr;
+
+class SamplerThread;
+
+static SamplerThread* NewSamplerThread(PSLockRef aLock, uint32_t aGeneration,
+                                       double aInterval, uint32_t aFeatures);
+
+struct LiveProfiledThreadData {
+  RegisteredThread* mRegisteredThread;
+  UniquePtr<ProfiledThreadData> mProfiledThreadData;
+};
+
+// The buffer size is provided as a number of "entries", this is their size in
+// bytes.
+constexpr static uint32_t scBytesPerEntry = 8;
+
+// This class contains the profiler's global state that is valid only when the
+// profiler is active. When not instantiated, the profiler is inactive.
+//
+// Accesses to ActivePS are guarded by gPSMutex, in much the same fashion as
+// CorePS.
+//
+class ActivePS {
+ private:
+  constexpr static uint32_t ChunkSizeForEntries(uint32_t aEntries) {
+    return uint32_t(std::min(size_t(ClampToAllowedEntries(aEntries)) *
+                                 scBytesPerEntry / scMinimumNumberOfChunks,
+                             size_t(scMaximumChunkSize)));
+  }
+
+  static uint32_t AdjustFeatures(uint32_t aFeatures, uint32_t aFilterCount) {
+    // Filter out any features unavailable in this platform/configuration.
+    aFeatures &= AvailableFeatures();
+
+    // Some features imply others.
+    if (aFeatures & ProfilerFeature::FileIOAll) {
+      aFeatures |= ProfilerFeature::MainThreadIO | ProfilerFeature::FileIO;
+    } else if (aFeatures & ProfilerFeature::FileIO) {
+      aFeatures |= ProfilerFeature::MainThreadIO;
+    }
+
+    return aFeatures;
+  }
+
+  ActivePS(PSLockRef aLock, const TimeStamp& aProfilingStartTime,
+           PowerOfTwo32 aCapacity, double aInterval, uint32_t aFeatures,
+           const char** aFilters, uint32_t aFilterCount,
+           const Maybe<double>& aDuration)
+      : mProfilingStartTime(aProfilingStartTime),
+        mGeneration(sNextGeneration++),
+        mCapacity(aCapacity),
+        mDuration(aDuration),
+        mInterval(aInterval),
+        mFeatures(AdjustFeatures(aFeatures, aFilterCount)),
+        mProfileBufferChunkManager(
+            MakeUnique<ProfileBufferChunkManagerWithLocalLimit>(
+                size_t(ClampToAllowedEntries(aCapacity.Value())) *
+                    scBytesPerEntry,
+                ChunkSizeForEntries(aCapacity.Value()))),
+        mProfileBuffer([this]() -> ProfileChunkedBuffer& {
+          ProfileChunkedBuffer& buffer = profiler_get_core_buffer();
+          buffer.SetChunkManager(*mProfileBufferChunkManager);
+          return buffer;
+        }()),
+        // The new sampler thread doesn't start sampling immediately because the
+        // main loop within Run() is blocked until this function's caller
+        // unlocks gPSMutex.
+        mSamplerThread(
+            NewSamplerThread(aLock, mGeneration, aInterval, aFeatures)),
+        mIsPaused(false),
+        mIsSamplingPaused(false) {
+    // Deep copy and lower-case aFilters.
+    MOZ_ALWAYS_TRUE(mFilters.resize(aFilterCount));
+    MOZ_ALWAYS_TRUE(mFiltersLowered.resize(aFilterCount));
+    for (uint32_t i = 0; i < aFilterCount; ++i) {
+      mFilters[i] = aFilters[i];
+      mFiltersLowered[i].reserve(mFilters[i].size());
+      std::transform(mFilters[i].cbegin(), mFilters[i].cend(),
+                     std::back_inserter(mFiltersLowered[i]), ::tolower);
+    }
+  }
+
+  ~ActivePS() {
+    if (mProfileBufferChunkManager) {
+      // We still control the chunk manager, remove it from the core buffer.
+      profiler_get_core_buffer().ResetChunkManager();
+    }
+  }
+
+  bool ThreadSelected(const char* aThreadName) {
+    if (mFiltersLowered.empty()) {
+      return true;
+    }
+
+    std::string name = aThreadName;
+    std::transform(name.begin(), name.end(), name.begin(), ::tolower);
+
+    for (const auto& filter : mFiltersLowered) {
+      if (filter == "*") {
+        return true;
+      }
+
+      // Crude, non UTF-8 compatible, case insensitive substring search
+      if (name.find(filter) != std::string::npos) {
+        return true;
+      }
+
+      // If the filter is "pid:<my pid>", profile all threads.
+      if (mozilla::profiler::detail::FilterHasPid(filter.c_str())) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
+ public:
+  static void Create(PSLockRef aLock, const TimeStamp& aProfilingStartTime,
+                     PowerOfTwo32 aCapacity, double aInterval,
+                     uint32_t aFeatures, const char** aFilters,
+                     uint32_t aFilterCount, const Maybe<double>& aDuration) {
+    MOZ_ASSERT(!sInstance);
+    sInstance = new ActivePS(aLock, aProfilingStartTime, aCapacity, aInterval,
+                             aFeatures, aFilters, aFilterCount, aDuration);
+  }
+
+  [[nodiscard]] static SamplerThread* Destroy(PSLockRef aLock) {
+    MOZ_ASSERT(sInstance);
+    auto samplerThread = sInstance->mSamplerThread;
+    delete sInstance;
+    sInstance = nullptr;
+
+    return samplerThread;
+  }
+
+  static bool Exists(PSLockRef) { return !!sInstance; }
+
+  static bool Equals(PSLockRef, PowerOfTwo32 aCapacity,
+                     const Maybe<double>& aDuration, double aInterval,
+                     uint32_t aFeatures, const char** aFilters,
+                     uint32_t aFilterCount) {
+    MOZ_ASSERT(sInstance);
+    if (sInstance->mCapacity != aCapacity ||
+        sInstance->mDuration != aDuration ||
+        sInstance->mInterval != aInterval ||
+        sInstance->mFeatures != aFeatures ||
+        sInstance->mFilters.length() != aFilterCount) {
+      return false;
+    }
+
+    for (uint32_t i = 0; i < sInstance->mFilters.length(); ++i) {
+      if (strcmp(sInstance->mFilters[i].c_str(), aFilters[i]) != 0) {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  static size_t SizeOf(PSLockRef, MallocSizeOf aMallocSizeOf) {
+    MOZ_ASSERT(sInstance);
+
+    size_t n = aMallocSizeOf(sInstance);
+
+    n += sInstance->mProfileBuffer.SizeOfExcludingThis(aMallocSizeOf);
+
+    // Measurement of the following members may be added later if DMD finds it
+    // is worthwhile:
+    // - mLiveProfiledThreads (both the array itself, and the contents)
+    // - mDeadProfiledThreads (both the array itself, and the contents)
+    //
+
+    return n;
+  }
+
+  static UniquePtr<ProfileBufferChunkManagerWithLocalLimit>
+  ExtractBaseProfilerChunkManager(PSLockRef) {
+    MOZ_ASSERT(sInstance);
+    return std::move(sInstance->mProfileBufferChunkManager);
+  }
+
+  static bool ShouldProfileThread(PSLockRef aLock, ThreadInfo* aInfo) {
+    MOZ_ASSERT(sInstance);
+    return sInstance->ThreadSelected(aInfo->Name());
+  }
+
+  PS_GET_LOCKLESS(TimeStamp, ProfilingStartTime)
+
+  PS_GET(uint32_t, Generation)
+
+  PS_GET(PowerOfTwo32, Capacity)
+
+  PS_GET(Maybe<double>, Duration)
+
+  PS_GET(double, Interval)
+
+  PS_GET(uint32_t, Features)
+
+#define PS_GET_FEATURE(n_, str_, Name_, desc_)                \
+  static bool Feature##Name_(PSLockRef) {                     \
+    MOZ_ASSERT(sInstance);                                    \
+    return ProfilerFeature::Has##Name_(sInstance->mFeatures); \
+  }
+
+  BASE_PROFILER_FOR_EACH_FEATURE(PS_GET_FEATURE)
+
+#undef PS_GET_FEATURE
+
+  PS_GET(const Vector<std::string>&, Filters)
+  PS_GET(const Vector<std::string>&, FiltersLowered)
+
+  static void FulfillChunkRequests(PSLockRef) {
+    MOZ_ASSERT(sInstance);
+    if (sInstance->mProfileBufferChunkManager) {
+      sInstance->mProfileBufferChunkManager->FulfillChunkRequests();
+    }
+  }
+
+  static ProfileBuffer& Buffer(PSLockRef) {
+    MOZ_ASSERT(sInstance);
+    return sInstance->mProfileBuffer;
+  }
+
+  static const Vector<LiveProfiledThreadData>& LiveProfiledThreads(PSLockRef) {
+    MOZ_ASSERT(sInstance);
+    return sInstance->mLiveProfiledThreads;
+  }
+
+  // Returns an array containing (RegisteredThread*, ProfiledThreadData*) pairs
+  // for all threads that should be included in a profile, both for threads
+  // that are still registered, and for threads that have been unregistered but
+  // still have data in the buffer.
+  // For threads that have already been unregistered, the RegisteredThread
+  // pointer will be null.
+  // The returned array is sorted by thread register time.
+  // Do not hold on to the return value across thread registration or profiler
+  // restarts.
+  static Vector<std::pair<RegisteredThread*, ProfiledThreadData*>>
+  ProfiledThreads(PSLockRef) {
+    MOZ_ASSERT(sInstance);
+    Vector<std::pair<RegisteredThread*, ProfiledThreadData*>> array;
+    MOZ_RELEASE_ASSERT(
+        array.initCapacity(sInstance->mLiveProfiledThreads.length() +
+                           sInstance->mDeadProfiledThreads.length()));
+    for (auto& t : sInstance->mLiveProfiledThreads) {
+      MOZ_RELEASE_ASSERT(array.append(
+          std::make_pair(t.mRegisteredThread, t.mProfiledThreadData.get())));
+    }
+    for (auto& t : sInstance->mDeadProfiledThreads) {
+      MOZ_RELEASE_ASSERT(
+          array.append(std::make_pair((RegisteredThread*)nullptr, t.get())));
+    }
+
+    std::sort(array.begin(), array.end(),
+              [](const std::pair<RegisteredThread*, ProfiledThreadData*>& a,
+                 const std::pair<RegisteredThread*, ProfiledThreadData*>& b) {
+                return a.second->Info()->RegisterTime() <
+                       b.second->Info()->RegisterTime();
+              });
+    return array;
+  }
+
+  static Vector<RefPtr<PageInformation>> ProfiledPages(PSLockRef aLock) {
+    MOZ_ASSERT(sInstance);
+    Vector<RefPtr<PageInformation>> array;
+    for (auto& d : CorePS::RegisteredPages(aLock)) {
+      MOZ_RELEASE_ASSERT(array.append(d));
+    }
+    for (auto& d : sInstance->mDeadProfiledPages) {
+      MOZ_RELEASE_ASSERT(array.append(d));
+    }
+    // We don't need to sort the pages like threads since we won't show them
+    // as a list.
+    return array;
+  }
+
+  // Do a linear search through mLiveProfiledThreads to find the
+  // ProfiledThreadData object for a RegisteredThread.
+  static ProfiledThreadData* GetProfiledThreadData(
+      PSLockRef, RegisteredThread* aRegisteredThread) {
+    MOZ_ASSERT(sInstance);
+    for (const LiveProfiledThreadData& thread :
+         sInstance->mLiveProfiledThreads) {
+      if (thread.mRegisteredThread == aRegisteredThread) {
+        return thread.mProfiledThreadData.get();
+      }
+    }
+    return nullptr;
+  }
+
+  static ProfiledThreadData* AddLiveProfiledThread(
+      PSLockRef, RegisteredThread* aRegisteredThread,
+      UniquePtr<ProfiledThreadData>&& aProfiledThreadData) {
+    MOZ_ASSERT(sInstance);
+    MOZ_RELEASE_ASSERT(
+        sInstance->mLiveProfiledThreads.append(LiveProfiledThreadData{
+            aRegisteredThread, std::move(aProfiledThreadData)}));
+
+    // Return a weak pointer to the ProfiledThreadData object.
+    return sInstance->mLiveProfiledThreads.back().mProfiledThreadData.get();
+  }
+
+  static void UnregisterThread(PSLockRef aLockRef,
+                               RegisteredThread* aRegisteredThread) {
+    MOZ_ASSERT(sInstance);
+
+    DiscardExpiredDeadProfiledThreads(aLockRef);
+
+    // Find the right entry in the mLiveProfiledThreads array and remove the
+    // element, moving the ProfiledThreadData object for the thread into the
+    // mDeadProfiledThreads array.
+    // The thread's RegisteredThread object gets destroyed here.
+    for (size_t i = 0; i < sInstance->mLiveProfiledThreads.length(); i++) {
+      LiveProfiledThreadData& thread = sInstance->mLiveProfiledThreads[i];
+      if (thread.mRegisteredThread == aRegisteredThread) {
+        thread.mProfiledThreadData->NotifyUnregistered(
+            sInstance->mProfileBuffer.BufferRangeEnd());
+        MOZ_RELEASE_ASSERT(sInstance->mDeadProfiledThreads.append(
+            std::move(thread.mProfiledThreadData)));
+        sInstance->mLiveProfiledThreads.erase(
+            &sInstance->mLiveProfiledThreads[i]);
+        return;
+      }
+    }
+  }
+
+  PS_GET_AND_SET(bool, IsPaused)
+
+  // True if sampling is paused (though generic `SetIsPaused()` or specific
+  // `SetIsSamplingPaused()`).
+  static bool IsSamplingPaused(PSLockRef lock) {
+    MOZ_ASSERT(sInstance);
+    return IsPaused(lock) || sInstance->mIsSamplingPaused;
+  }
+
+  static void SetIsSamplingPaused(PSLockRef, bool aIsSamplingPaused) {
+    MOZ_ASSERT(sInstance);
+    sInstance->mIsSamplingPaused = aIsSamplingPaused;
+  }
+
+  static void DiscardExpiredDeadProfiledThreads(PSLockRef) {
+    MOZ_ASSERT(sInstance);
+    uint64_t bufferRangeStart = sInstance->mProfileBuffer.BufferRangeStart();
+    // Discard any dead threads that were unregistered before bufferRangeStart.
+    sInstance->mDeadProfiledThreads.eraseIf(
+        [bufferRangeStart](
+            const UniquePtr<ProfiledThreadData>& aProfiledThreadData) {
+          Maybe<uint64_t> bufferPosition =
+              aProfiledThreadData->BufferPositionWhenUnregistered();
+          MOZ_RELEASE_ASSERT(bufferPosition,
+                             "should have unregistered this thread");
+          return *bufferPosition < bufferRangeStart;
+        });
+  }
+
+  static void UnregisterPage(PSLockRef aLock,
+                             uint64_t aRegisteredInnerWindowID) {
+    MOZ_ASSERT(sInstance);
+    auto& registeredPages = CorePS::RegisteredPages(aLock);
+    for (size_t i = 0; i < registeredPages.length(); i++) {
+      RefPtr<PageInformation>& page = registeredPages[i];
+      if (page->InnerWindowID() == aRegisteredInnerWindowID) {
+        page->NotifyUnregistered(sInstance->mProfileBuffer.BufferRangeEnd());
+        MOZ_RELEASE_ASSERT(
+            sInstance->mDeadProfiledPages.append(std::move(page)));
+        registeredPages.erase(&registeredPages[i--]);
+      }
+    }
+  }
+
+  static void DiscardExpiredPages(PSLockRef) {
+    MOZ_ASSERT(sInstance);
+    uint64_t bufferRangeStart = sInstance->mProfileBuffer.BufferRangeStart();
+    // Discard any dead pages that were unregistered before
+    // bufferRangeStart.
+    sInstance->mDeadProfiledPages.eraseIf(
+        [bufferRangeStart](const RefPtr<PageInformation>& aProfiledPage) {
+          Maybe<uint64_t> bufferPosition =
+              aProfiledPage->BufferPositionWhenUnregistered();
+          MOZ_RELEASE_ASSERT(bufferPosition,
+                             "should have unregistered this page");
+          return *bufferPosition < bufferRangeStart;
+        });
+  }
+
+  static void ClearUnregisteredPages(PSLockRef) {
+    MOZ_ASSERT(sInstance);
+    sInstance->mDeadProfiledPages.clear();
+  }
+
+  static void ClearExpiredExitProfiles(PSLockRef) {
+    MOZ_ASSERT(sInstance);
+    uint64_t bufferRangeStart = sInstance->mProfileBuffer.BufferRangeStart();
+    // Discard exit profiles that were gathered before our buffer RangeStart.
+    sInstance->mExitProfiles.eraseIf(
+        [bufferRangeStart](const ExitProfile& aExitProfile) {
+          return aExitProfile.mBufferPositionAtGatherTime < bufferRangeStart;
+        });
+  }
+
+  static void AddExitProfile(PSLockRef aLock, const std::string& aExitProfile) {
+    MOZ_ASSERT(sInstance);
+
+    ClearExpiredExitProfiles(aLock);
+
+    MOZ_RELEASE_ASSERT(sInstance->mExitProfiles.append(
+        ExitProfile{aExitProfile, sInstance->mProfileBuffer.BufferRangeEnd()}));
+  }
+
+  static Vector<std::string> MoveExitProfiles(PSLockRef aLock) {
+    MOZ_ASSERT(sInstance);
+
+    ClearExpiredExitProfiles(aLock);
+
+    Vector<std::string> profiles;
+    MOZ_RELEASE_ASSERT(
+        profiles.initCapacity(sInstance->mExitProfiles.length()));
+    for (auto& profile : sInstance->mExitProfiles) {
+      MOZ_RELEASE_ASSERT(profiles.append(std::move(profile.mJSON)));
+    }
+    sInstance->mExitProfiles.clear();
+    return profiles;
+  }
+
+ private:
+  // The singleton instance.
+  static ActivePS* sInstance;
+
+  const TimeStamp mProfilingStartTime;
+
+  // We need to track activity generations. If we didn't we could have the
+  // following scenario.
+  //
+  // - profiler_stop() locks gPSMutex, de-instantiates ActivePS, unlocks
+  //   gPSMutex, deletes the SamplerThread (which does a join).
+  //
+  // - profiler_start() runs on a different thread, locks gPSMutex,
+  //   re-instantiates ActivePS, unlocks gPSMutex -- all before the join
+  //   completes.
+  //
+  // - SamplerThread::Run() locks gPSMutex, sees that ActivePS is instantiated,
+  //   and continues as if the start/stop pair didn't occur. Also
+  //   profiler_stop() is stuck, unable to finish.
+  //
+  // By checking ActivePS *and* the generation, we can avoid this scenario.
+  // sNextGeneration is used to track the next generation number; it is static
+  // because it must persist across different ActivePS instantiations.
+  const uint32_t mGeneration;
+  static uint32_t sNextGeneration;
+
+  // The maximum number of 8-byte entries in mProfileBuffer.
+  const PowerOfTwo32 mCapacity;
+
+  // The maximum duration of entries in mProfileBuffer, in seconds.
+  const Maybe<double> mDuration;
+
+  // The interval between samples, measured in milliseconds.
+  const double mInterval;
+
+  // The profile features that are enabled.
+  const uint32_t mFeatures;
+
+  // Substrings of names of threads we want to profile.
+  Vector<std::string> mFilters;
+  Vector<std::string> mFiltersLowered;
+
+  // The chunk manager used by `mProfileBuffer` below.
+  // May become null if it gets transferred to the Gecko Profiler.
+  UniquePtr<ProfileBufferChunkManagerWithLocalLimit> mProfileBufferChunkManager;
+
+  // The buffer into which all samples are recorded.
+  ProfileBuffer mProfileBuffer;
+
+  // ProfiledThreadData objects for any threads that were profiled at any point
+  // during this run of the profiler:
+  //  - mLiveProfiledThreads contains all threads that are still registered, and
+  //  - mDeadProfiledThreads contains all threads that have already been
+  //    unregistered but for which there is still data in the profile buffer.
+  Vector<LiveProfiledThreadData> mLiveProfiledThreads;
+  Vector<UniquePtr<ProfiledThreadData>> mDeadProfiledThreads;
+
+  // Info on all the dead pages.
+  // Registered pages are being moved to this array after unregistration.
+  // We are keeping them in case we need them in the profile data.
+  // We are removing them when we ensure that we won't need them anymore.
+  Vector<RefPtr<PageInformation>> mDeadProfiledPages;
+
+  // The current sampler thread. This class is not responsible for destroying
+  // the SamplerThread object; the Destroy() method returns it so the caller
+  // can destroy it.
+  SamplerThread* const mSamplerThread;
+
+  // Is the profiler fully paused?
+  bool mIsPaused;
+
+  // Is the profiler periodic sampling paused?
+  bool mIsSamplingPaused;
+
+  struct ExitProfile {
+    std::string mJSON;
+    uint64_t mBufferPositionAtGatherTime;
+  };
+  Vector<ExitProfile> mExitProfiles;
+};
+
+ActivePS* ActivePS::sInstance = nullptr;
+uint32_t ActivePS::sNextGeneration = 0;
+
+#undef PS_GET
+#undef PS_GET_LOCKLESS
+#undef PS_GET_AND_SET
+
+namespace detail {
+
+TimeStamp GetProfilingStartTime() {
+  if (!CorePS::Exists()) {
+    return {};
+  }
+  PSAutoLock lock;
+  if (!ActivePS::Exists(lock)) {
+    return {};
+  }
+  return ActivePS::ProfilingStartTime();
+}
+
+[[nodiscard]] MFBT_API UniquePtr<ProfileBufferChunkManagerWithLocalLimit>
+ExtractBaseProfilerChunkManager() {
+  PSAutoLock lock;
+  if (MOZ_UNLIKELY(!ActivePS::Exists(lock))) {
+    return nullptr;
+  }
+  return ActivePS::ExtractBaseProfilerChunkManager(lock);
+}
+
+}  // namespace detail
+
+Atomic<uint32_t, MemoryOrdering::Relaxed> RacyFeatures::sActiveAndFeatures(0);
+
+/* static */
+void RacyFeatures::SetActive(uint32_t aFeatures) {
+  sActiveAndFeatures = Active | aFeatures;
+}
+
+/* static */
+void RacyFeatures::SetInactive() { sActiveAndFeatures = 0; }
+
+/* static */
+bool RacyFeatures::IsActive() { return uint32_t(sActiveAndFeatures) & Active; }
+
+/* static */
+void RacyFeatures::SetPaused() { sActiveAndFeatures |= Paused; }
+
+/* static */
+void RacyFeatures::SetUnpaused() { sActiveAndFeatures &= ~Paused; }
+
+/* static */
+void RacyFeatures::SetSamplingPaused() { sActiveAndFeatures |= SamplingPaused; }
+
+/* static */
+void RacyFeatures::SetSamplingUnpaused() {
+  sActiveAndFeatures &= ~SamplingPaused;
+}
+
+/* static */
+bool RacyFeatures::IsActiveWithFeature(uint32_t aFeature) {
+  uint32_t af = sActiveAndFeatures;  // copy it first
+  return (af & Active) && (af & aFeature);
+}
+
+/* static */
+bool RacyFeatures::IsActiveWithoutFeature(uint32_t aFeature) {
+  uint32_t af = sActiveAndFeatures;  // copy it first
+  return (af & Active) && !(af & aFeature);
+}
+
+/* static */
+bool RacyFeatures::IsActiveAndUnpaused() {
+  uint32_t af = sActiveAndFeatures;  // copy it first
+  return (af & Active) && !(af & Paused);
+}
+
+/* static */
+bool RacyFeatures::IsActiveAndSamplingUnpaused() {
+  uint32_t af = sActiveAndFeatures;  // copy it first
+  return (af & Active) && !(af & (Paused | SamplingPaused));
+}
+
+// Each live thread has a RegisteredThread, and we store a reference to it in
+// TLS. This class encapsulates that TLS.
+class TLSRegisteredThread {
+ public:
+  static bool Init(PSLockRef) {
+    bool ok1 = sRegisteredThread.init();
+    bool ok2 = AutoProfilerLabel::sProfilingStack.init();
+    return ok1 && ok2;
+  }
+
+  // Get the entire RegisteredThread. Accesses are guarded by gPSMutex.
+  static class RegisteredThread* RegisteredThread(PSLockRef) {
+    return sRegisteredThread.get();
+  }
+
+  // Get only the RacyRegisteredThread. Accesses are not guarded by gPSMutex.
+  static class RacyRegisteredThread* RacyRegisteredThread() {
+    class RegisteredThread* registeredThread = sRegisteredThread.get();
+    return registeredThread ? &registeredThread->RacyRegisteredThread()
+                            : nullptr;
+  }
+
+  // Get only the ProfilingStack. Accesses are not guarded by gPSMutex.
+  // RacyRegisteredThread() can also be used to get the ProfilingStack, but that
+  // is marginally slower because it requires an extra pointer indirection.
+  static ProfilingStack* Stack() {
+    return AutoProfilerLabel::sProfilingStack.get();
+  }
+
+  static void SetRegisteredThread(PSLockRef,
+                                  class RegisteredThread* aRegisteredThread) {
+    sRegisteredThread.set(aRegisteredThread);
+    AutoProfilerLabel::sProfilingStack.set(
+        aRegisteredThread
+            ? &aRegisteredThread->RacyRegisteredThread().ProfilingStack()
+            : nullptr);
+  }
+
+ private:
+  // This is a non-owning reference to the RegisteredThread;
+  // CorePS::mRegisteredThreads is the owning reference. On thread
+  // deregistration, this reference is cleared and the RegisteredThread is
+  // destroyed.
+  static MOZ_THREAD_LOCAL(class RegisteredThread*) sRegisteredThread;
+};
+
+MOZ_THREAD_LOCAL(RegisteredThread*) TLSRegisteredThread::sRegisteredThread;
+
+/* static */
+ProfilingStack* AutoProfilerLabel::GetProfilingStack() {
+  return sProfilingStack.get();
+}
+
+// Although you can access a thread's ProfilingStack via
+// TLSRegisteredThread::sRegisteredThread, we also have a second TLS pointer
+// directly to the ProfilingStack. Here's why.
+//
+// - We need to be able to push to and pop from the ProfilingStack in
+//   AutoProfilerLabel.
+//
+// - The class functions are hot and must be defined in BaseProfiler.h so they
+//   can be inlined.
+//
+// - We don't want to expose TLSRegisteredThread (and RegisteredThread) in
+//   BaseProfiler.h.
+//
+// This second pointer isn't ideal, but does provide a way to satisfy those
+// constraints. TLSRegisteredThread is responsible for updating it.
+MOZ_THREAD_LOCAL(ProfilingStack*) AutoProfilerLabel::sProfilingStack;
+
+namespace detail {
+
+[[nodiscard]] MFBT_API TimeStamp GetThreadRegistrationTime() {
+  if (!CorePS::Exists()) {
+    return {};
+  }
+
+  PSAutoLock lock;
+
+  RegisteredThread* registeredThread =
+      TLSRegisteredThread::RegisteredThread(lock);
+  if (!registeredThread) {
+    return {};
+  }
+
+  return registeredThread->Info()->RegisterTime();
+}
+
+}  // namespace detail
+
+// The name of the main thread.
+static const char* const kMainThreadName = "GeckoMain";
+
+////////////////////////////////////////////////////////////////////////
+// BEGIN sampling/unwinding code
+
+// Additional registers that have to be saved when thread is paused.
+#if defined(GP_PLAT_x86_linux) || defined(GP_PLAT_x86_android) || \
+    defined(GP_ARCH_x86)
+#  define UNWINDING_REGS_HAVE_ECX_EDX
+#elif defined(GP_PLAT_amd64_linux) || defined(GP_PLAT_amd64_android) || \
+    defined(GP_PLAT_amd64_freebsd) || defined(GP_ARCH_amd64) ||         \
+    defined(__x86_64__)
+#  define UNWINDING_REGS_HAVE_R10_R12
+#elif defined(GP_PLAT_arm_linux) || defined(GP_PLAT_arm_android)
+#  define UNWINDING_REGS_HAVE_LR_R7
+#elif defined(GP_PLAT_arm64_linux) || defined(GP_PLAT_arm64_android) || \
+    defined(GP_PLAT_arm64_freebsd) || defined(GP_ARCH_arm64) ||         \
+    defined(__aarch64__)
+#  define UNWINDING_REGS_HAVE_LR_R11
+#endif
+
+// The registers used for stack unwinding and a few other sampling purposes.
+// The ctor does nothing; users are responsible for filling in the fields.
+class Registers {
+ public:
+  Registers()
+      : mPC{nullptr},
+        mSP{nullptr},
+        mFP{nullptr}
+#if defined(UNWINDING_REGS_HAVE_ECX_EDX)
+        ,
+        mEcx{nullptr},
+        mEdx{nullptr}
+#elif defined(UNWINDING_REGS_HAVE_R10_R12)
+        ,
+        mR10{nullptr},
+        mR12{nullptr}
+#elif defined(UNWINDING_REGS_HAVE_LR_R7)
+        ,
+        mLR{nullptr},
+        mR7{nullptr}
+#elif defined(UNWINDING_REGS_HAVE_LR_R11)
+        ,
+        mLR{nullptr},
+        mR11{nullptr}
+#endif
+  {
+  }
+
+  void Clear() { memset(this, 0, sizeof(*this)); }
+
+  // These fields are filled in by
+  // Sampler::SuspendAndSampleAndResumeThread() for periodic and backtrace
+  // samples, and by REGISTERS_SYNC_POPULATE for synchronous samples.
+  Address mPC;  // Instruction pointer.
+  Address mSP;  // Stack pointer.
+  Address mFP;  // Frame pointer.
+#if defined(UNWINDING_REGS_HAVE_ECX_EDX)
+  Address mEcx;  // Temp for return address.
+  Address mEdx;  // Temp for frame pointer.
+#elif defined(UNWINDING_REGS_HAVE_R10_R12)
+  Address mR10;  // Temp for return address.
+  Address mR12;  // Temp for frame pointer.
+#elif defined(UNWINDING_REGS_HAVE_LR_R7)
+  Address mLR;  // ARM link register, or temp for return address.
+  Address mR7;  // Temp for frame pointer.
+#elif defined(UNWINDING_REGS_HAVE_LR_R11)
+  Address mLR;   // ARM link register, or temp for return address.
+  Address mR11;  // Temp for frame pointer.
+#endif
+
+#if defined(GP_OS_linux) || defined(GP_OS_android) || defined(GP_OS_freebsd)
+  // This contains all the registers, which means it duplicates the four fields
+  // above. This is ok.
+  ucontext_t* mContext;  // The context from the signal handler.
+#endif
+};
+
+// Setting MAX_NATIVE_FRAMES too high risks the unwinder wasting a lot of time
+// looping on corrupted stacks.
+static const size_t MAX_NATIVE_FRAMES = 1024;
+
+struct NativeStack {
+  void* mPCs[MAX_NATIVE_FRAMES];
+  void* mSPs[MAX_NATIVE_FRAMES];
+  size_t mCount;  // Number of frames filled.
+
+  NativeStack() : mPCs(), mSPs(), mCount(0) {}
+};
+
+// Merges the profiling stack and native stack, outputting the details to
+// aCollector.
+static void MergeStacks(uint32_t aFeatures, bool aIsSynchronous,
+                        const RegisteredThread& aRegisteredThread,
+                        const Registers& aRegs, const NativeStack& aNativeStack,
+                        ProfilerStackCollector& aCollector) {
+  // WARNING: this function runs within the profiler's "critical section".
+  // WARNING: this function might be called while the profiler is inactive, and
+  //          cannot rely on ActivePS.
+
+  const ProfilingStack& profilingStack =
+      aRegisteredThread.RacyRegisteredThread().ProfilingStack();
+  const ProfilingStackFrame* profilingStackFrames = profilingStack.frames;
+  uint32_t profilingStackFrameCount = profilingStack.stackSize();
+
+  Maybe<uint64_t> samplePosInBuffer;
+  if (!aIsSynchronous) {
+    // aCollector.SamplePositionInBuffer() will return Nothing() when
+    // profiler_suspend_and_sample_thread is called from the background hang
+    // reporter.
+    samplePosInBuffer = aCollector.SamplePositionInBuffer();
+  }
+  // While the profiling stack array is ordered oldest-to-youngest, the JS and
+  // native arrays are ordered youngest-to-oldest. We must add frames to aInfo
+  // oldest-to-youngest. Thus, iterate over the profiling stack forwards and JS
+  // and native arrays backwards. Note: this means the terminating condition
+  // jsIndex and nativeIndex is being < 0.
+  uint32_t profilingStackIndex = 0;
+  int32_t nativeIndex = aNativeStack.mCount - 1;
+
+  uint8_t* lastLabelFrameStackAddr = nullptr;
+
+  // Iterate as long as there is at least one frame remaining.
+  while (profilingStackIndex != profilingStackFrameCount || nativeIndex >= 0) {
+    // There are 1 to 3 frames available. Find and add the oldest.
+    uint8_t* profilingStackAddr = nullptr;
+    uint8_t* nativeStackAddr = nullptr;
+
+    if (profilingStackIndex != profilingStackFrameCount) {
+      const ProfilingStackFrame& profilingStackFrame =
+          profilingStackFrames[profilingStackIndex];
+
+      if (profilingStackFrame.isLabelFrame() ||
+          profilingStackFrame.isSpMarkerFrame()) {
+        lastLabelFrameStackAddr = (uint8_t*)profilingStackFrame.stackAddress();
+      }
+
+      // Skip any JS_OSR frames. Such frames are used when the JS interpreter
+      // enters a jit frame on a loop edge (via on-stack-replacement, or OSR).
+      // To avoid both the profiling stack frame and jit frame being recorded
+      // (and showing up twice), the interpreter marks the interpreter
+      // profiling stack frame as JS_OSR to ensure that it doesn't get counted.
+      if (profilingStackFrame.isOSRFrame()) {
+        profilingStackIndex++;
+        continue;
+      }
+
+      MOZ_ASSERT(lastLabelFrameStackAddr);
+      profilingStackAddr = lastLabelFrameStackAddr;
+    }
+
+    if (nativeIndex >= 0) {
+      nativeStackAddr = (uint8_t*)aNativeStack.mSPs[nativeIndex];
+    }
+
+    // If there's a native stack frame which has the same SP as a profiling
+    // stack frame, pretend we didn't see the native stack frame.  Ditto for a
+    // native stack frame which has the same SP as a JS stack frame.  In effect
+    // this means profiling stack frames or JS frames trump conflicting native
+    // frames.
+    if (nativeStackAddr && (profilingStackAddr == nativeStackAddr)) {
+      nativeStackAddr = nullptr;
+      nativeIndex--;
+      MOZ_ASSERT(profilingStackAddr);
+    }
+
+    // Sanity checks.
+    MOZ_ASSERT_IF(profilingStackAddr, profilingStackAddr != nativeStackAddr);
+    MOZ_ASSERT_IF(nativeStackAddr, nativeStackAddr != profilingStackAddr);
+
+    // Check to see if profiling stack frame is top-most.
+    if (profilingStackAddr > nativeStackAddr) {
+      MOZ_ASSERT(profilingStackIndex < profilingStackFrameCount);
+      const ProfilingStackFrame& profilingStackFrame =
+          profilingStackFrames[profilingStackIndex];
+
+      // Sp marker frames are just annotations and should not be recorded in
+      // the profile.
+      if (!profilingStackFrame.isSpMarkerFrame()) {
+        if (aIsSynchronous && profilingStackFrame.categoryPair() ==
+                                  ProfilingCategoryPair::PROFILER) {
+          // For stacks captured synchronously (ie. marker stacks), stop
+          // walking the stack as soon as we enter the profiler category,
+          // to avoid showing profiler internal code in marker stacks.
+          return;
+        }
+        aCollector.CollectProfilingStackFrame(profilingStackFrame);
+      }
+      profilingStackIndex++;
+      continue;
+    }
+
+    // If we reach here, there must be a native stack frame and it must be the
+    // greatest frame.
+    if (nativeStackAddr) {
+      MOZ_ASSERT(nativeIndex >= 0);
+      void* addr = (void*)aNativeStack.mPCs[nativeIndex];
+      aCollector.CollectNativeLeafAddr(addr);
+    }
+    if (nativeIndex >= 0) {
+      nativeIndex--;
+    }
+  }
+}
+
+#if defined(GP_OS_windows) && defined(USE_MOZ_STACK_WALK)
+static HANDLE GetThreadHandle(PlatformData* aData);
+#endif
+
+#if defined(USE_FRAME_POINTER_STACK_WALK) || defined(USE_MOZ_STACK_WALK)
+static void StackWalkCallback(uint32_t aFrameNumber, void* aPC, void* aSP,
+                              void* aClosure) {
+  NativeStack* nativeStack = static_cast<NativeStack*>(aClosure);
+  MOZ_ASSERT(nativeStack->mCount < MAX_NATIVE_FRAMES);
+  nativeStack->mSPs[nativeStack->mCount] = aSP;
+  nativeStack->mPCs[nativeStack->mCount] = aPC;
+  nativeStack->mCount++;
+}
+#endif
+
+#if defined(USE_FRAME_POINTER_STACK_WALK)
+static void DoFramePointerBacktrace(PSLockRef aLock,
+                                    const RegisteredThread& aRegisteredThread,
+                                    const Registers& aRegs,
+                                    NativeStack& aNativeStack) {
+  // WARNING: this function runs within the profiler's "critical section".
+  // WARNING: this function might be called while the profiler is inactive, and
+  //          cannot rely on ActivePS.
+
+  // Start with the current function. We use 0 as the frame number here because
+  // the FramePointerStackWalk() call below will use 1..N. This is a bit weird
+  // but it doesn't matter because StackWalkCallback() doesn't use the frame
+  // number argument.
+  StackWalkCallback(/* frameNum */ 0, aRegs.mPC, aRegs.mSP, &aNativeStack);
+
+  uint32_t maxFrames = uint32_t(MAX_NATIVE_FRAMES - aNativeStack.mCount);
+
+  const void* stackEnd = aRegisteredThread.StackTop();
+  if (aRegs.mFP >= aRegs.mSP && aRegs.mFP <= stackEnd) {
+    FramePointerStackWalk(StackWalkCallback, maxFrames, &aNativeStack,
+                          reinterpret_cast<void**>(aRegs.mFP),
+                          const_cast<void*>(stackEnd));
+  }
+}
+#endif
+
+#if defined(USE_MOZ_STACK_WALK)
+static void DoMozStackWalkBacktrace(PSLockRef aLock,
+                                    const RegisteredThread& aRegisteredThread,
+                                    const Registers& aRegs,
+                                    NativeStack& aNativeStack) {
+  // WARNING: this function runs within the profiler's "critical section".
+  // WARNING: this function might be called while the profiler is inactive, and
+  //          cannot rely on ActivePS.
+
+  // Start with the current function. We use 0 as the frame number here because
+  // the MozStackWalkThread() call below will use 1..N. This is a bit weird but
+  // it doesn't matter because StackWalkCallback() doesn't use the frame number
+  // argument.
+  StackWalkCallback(/* frameNum */ 0, aRegs.mPC, aRegs.mSP, &aNativeStack);
+
+  uint32_t maxFrames = uint32_t(MAX_NATIVE_FRAMES - aNativeStack.mCount);
+
+  HANDLE thread = GetThreadHandle(aRegisteredThread.GetPlatformData());
+  MOZ_ASSERT(thread);
+  MozStackWalkThread(StackWalkCallback, maxFrames, &aNativeStack, thread,
+                     /* context */ nullptr);
+}
+#endif
+
+#ifdef USE_EHABI_STACKWALK
+static void DoEHABIBacktrace(PSLockRef aLock,
+                             const RegisteredThread& aRegisteredThread,
+                             const Registers& aRegs,
+                             NativeStack& aNativeStack) {
+  // WARNING: this function runs within the profiler's "critical section".
+  // WARNING: this function might be called while the profiler is inactive, and
+  //          cannot rely on ActivePS.
+
+  aNativeStack.mCount =
+      EHABIStackWalk(aRegs.mContext->uc_mcontext,
+                     const_cast<void*>(aRegisteredThread.StackTop()),
+                     aNativeStack.mSPs, aNativeStack.mPCs, MAX_NATIVE_FRAMES);
+}
+#endif
+
+#ifdef USE_LUL_STACKWALK
+
+// See the comment at the callsite for why this function is necessary.
+#  if defined(MOZ_HAVE_ASAN_IGNORE)
+MOZ_ASAN_IGNORE static void ASAN_memcpy(void* aDst, const void* aSrc,
+                                        size_t aLen) {
+  // The obvious thing to do here is call memcpy(). However, although
+  // ASAN_memcpy() is not instrumented by ASAN, memcpy() still is, and the
+  // false positive still manifests! So we must implement memcpy() ourselves
+  // within this function.
+  char* dst = static_cast<char*>(aDst);
+  const char* src = static_cast<const char*>(aSrc);
+
+  for (size_t i = 0; i < aLen; i++) {
+    dst[i] = src[i];
+  }
+}
+#  endif
+
+static void DoLULBacktrace(PSLockRef aLock,
+                           const RegisteredThread& aRegisteredThread,
+                           const Registers& aRegs, NativeStack& aNativeStack) {
+  // WARNING: this function runs within the profiler's "critical section".
+  // WARNING: this function might be called while the profiler is inactive, and
+  //          cannot rely on ActivePS.
+
+  const mcontext_t* mc = &aRegs.mContext->uc_mcontext;
+
+  lul::UnwindRegs startRegs;
+  memset(&startRegs, 0, sizeof(startRegs));
+
+#  if defined(GP_PLAT_amd64_linux) || defined(GP_PLAT_amd64_android)
+  startRegs.xip = lul::TaggedUWord(mc->gregs[REG_RIP]);
+  startRegs.xsp = lul::TaggedUWord(mc->gregs[REG_RSP]);
+  startRegs.xbp = lul::TaggedUWord(mc->gregs[REG_RBP]);
+#  elif defined(GP_PLAT_amd64_freebsd)
+  startRegs.xip = lul::TaggedUWord(mc->mc_rip);
+  startRegs.xsp = lul::TaggedUWord(mc->mc_rsp);
+  startRegs.xbp = lul::TaggedUWord(mc->mc_rbp);
+#  elif defined(GP_PLAT_arm_linux) || defined(GP_PLAT_arm_android)
+  startRegs.r15 = lul::TaggedUWord(mc->arm_pc);
+  startRegs.r14 = lul::TaggedUWord(mc->arm_lr);
+  startRegs.r13 = lul::TaggedUWord(mc->arm_sp);
+  startRegs.r12 = lul::TaggedUWord(mc->arm_ip);
+  startRegs.r11 = lul::TaggedUWord(mc->arm_fp);
+  startRegs.r7 = lul::TaggedUWord(mc->arm_r7);
+#  elif defined(GP_PLAT_arm64_linux) || defined(GP_PLAT_arm64_android)
+  startRegs.pc = lul::TaggedUWord(mc->pc);
+  startRegs.x29 = lul::TaggedUWord(mc->regs[29]);
+  startRegs.x30 = lul::TaggedUWord(mc->regs[30]);
+  startRegs.sp = lul::TaggedUWord(mc->sp);
+#  elif defined(GP_PLAT_arm64_freebsd)
+  startRegs.pc = lul::TaggedUWord(mc->mc_gpregs.gp_elr);
+  startRegs.x29 = lul::TaggedUWord(mc->mc_gpregs.gp_x[29]);
+  startRegs.x30 = lul::TaggedUWord(mc->mc_gpregs.gp_lr);
+  startRegs.sp = lul::TaggedUWord(mc->mc_gpregs.gp_sp);
+#  elif defined(GP_PLAT_x86_linux) || defined(GP_PLAT_x86_android)
+  startRegs.xip = lul::TaggedUWord(mc->gregs[REG_EIP]);
+  startRegs.xsp = lul::TaggedUWord(mc->gregs[REG_ESP]);
+  startRegs.xbp = lul::TaggedUWord(mc->gregs[REG_EBP]);
+#  elif defined(GP_PLAT_mips64_linux)
+  startRegs.pc = lul::TaggedUWord(mc->pc);
+  startRegs.sp = lul::TaggedUWord(mc->gregs[29]);
+  startRegs.fp = lul::TaggedUWord(mc->gregs[30]);
+#  else
+#    error "Unknown plat"
+#  endif
+
+  // Copy up to N_STACK_BYTES from rsp-REDZONE upwards, but not going past the
+  // stack's registered top point.  Do some basic sanity checks too.  This
+  // assumes that the TaggedUWord holding the stack pointer value is valid, but
+  // it should be, since it was constructed that way in the code just above.
+
+  // We could construct |stackImg| so that LUL reads directly from the stack in
+  // question, rather than from a copy of it.  That would reduce overhead and
+  // space use a bit.  However, it gives a problem with dynamic analysis tools
+  // (ASan, TSan, Valgrind) which is that such tools will report invalid or
+  // racing memory accesses, and such accesses will be reported deep inside LUL.
+  // By taking a copy here, we can either sanitise the copy (for Valgrind) or
+  // copy it using an unchecked memcpy (for ASan, TSan).  That way we don't have
+  // to try and suppress errors inside LUL.
+  //
+  // N_STACK_BYTES is set to 160KB.  This is big enough to hold all stacks
+  // observed in some minutes of testing, whilst keeping the size of this
+  // function (DoNativeBacktrace)'s frame reasonable.  Most stacks observed in
+  // practice are small, 4KB or less, and so the copy costs are insignificant
+  // compared to other profiler overhead.
+  //
+  // |stackImg| is allocated on this (the sampling thread's) stack.  That
+  // implies that the frame for this function is at least N_STACK_BYTES large.
+  // In general it would be considered unacceptable to have such a large frame
+  // on a stack, but it only exists for the unwinder thread, and so is not
+  // expected to be a problem.  Allocating it on the heap is troublesome because
+  // this function runs whilst the sampled thread is suspended, so any heap
+  // allocation risks deadlock.  Allocating it as a global variable is not
+  // thread safe, which would be a problem if we ever allow multiple sampler
+  // threads.  Hence allocating it on the stack seems to be the least-worst
+  // option.
+
+  lul::StackImage stackImg;
+
+  {
+#  if defined(GP_PLAT_amd64_linux) || defined(GP_PLAT_amd64_android) || \
+      defined(GP_PLAT_amd64_freebsd)
+    uintptr_t rEDZONE_SIZE = 128;
+    uintptr_t start = startRegs.xsp.Value() - rEDZONE_SIZE;
+#  elif defined(GP_PLAT_arm_linux) || defined(GP_PLAT_arm_android)
+    uintptr_t rEDZONE_SIZE = 0;
+    uintptr_t start = startRegs.r13.Value() - rEDZONE_SIZE;
+#  elif defined(GP_PLAT_arm64_linux) || defined(GP_PLAT_arm64_android) || \
+      defined(GP_PLAT_arm64_freebsd)
+    uintptr_t rEDZONE_SIZE = 0;
+    uintptr_t start = startRegs.sp.Value() - rEDZONE_SIZE;
+#  elif defined(GP_PLAT_x86_linux) || defined(GP_PLAT_x86_android)
+    uintptr_t rEDZONE_SIZE = 0;
+    uintptr_t start = startRegs.xsp.Value() - rEDZONE_SIZE;
+#  elif defined(GP_PLAT_mips64_linux)
+    uintptr_t rEDZONE_SIZE = 0;
+    uintptr_t start = startRegs.sp.Value() - rEDZONE_SIZE;
+#  else
+#    error "Unknown plat"
+#  endif
+    uintptr_t end = reinterpret_cast<uintptr_t>(aRegisteredThread.StackTop());
+    uintptr_t ws = sizeof(void*);
+    start &= ~(ws - 1);
+    end &= ~(ws - 1);
+    uintptr_t nToCopy = 0;
+    if (start < end) {
+      nToCopy = end - start;
+      if (nToCopy > lul::N_STACK_BYTES) nToCopy = lul::N_STACK_BYTES;
+    }
+    MOZ_ASSERT(nToCopy <= lul::N_STACK_BYTES);
+    stackImg.mLen = nToCopy;
+    stackImg.mStartAvma = start;
+    if (nToCopy > 0) {
+      // If this is a vanilla memcpy(), ASAN makes the following complaint:
+      //
+      //   ERROR: AddressSanitizer: stack-buffer-underflow ...
+      //   ...
+      //   HINT: this may be a false positive if your program uses some custom
+      //   stack unwind mechanism or swapcontext
+      //
+      // This code is very much a custom stack unwind mechanism! So we use an
+      // alternative memcpy() implementation that is ignored by ASAN.
+#  if defined(MOZ_HAVE_ASAN_IGNORE)
+      ASAN_memcpy(&stackImg.mContents[0], (void*)start, nToCopy);
+#  else
+      memcpy(&stackImg.mContents[0], (void*)start, nToCopy);
+#  endif
+      (void)VALGRIND_MAKE_MEM_DEFINED(&stackImg.mContents[0], nToCopy);
+    }
+  }
+
+  size_t framePointerFramesAcquired = 0;
+  lul::LUL* lul = CorePS::Lul(aLock);
+  lul->Unwind(reinterpret_cast<uintptr_t*>(aNativeStack.mPCs),
+              reinterpret_cast<uintptr_t*>(aNativeStack.mSPs),
+              &aNativeStack.mCount, &framePointerFramesAcquired,
+              MAX_NATIVE_FRAMES, &startRegs, &stackImg);
+
+  // Update stats in the LUL stats object.  Unfortunately this requires
+  // three global memory operations.
+  lul->mStats.mContext += 1;
+  lul->mStats.mCFI += aNativeStack.mCount - 1 - framePointerFramesAcquired;
+  lul->mStats.mFP += framePointerFramesAcquired;
+}
+
+#endif
+
+#ifdef HAVE_NATIVE_UNWIND
+static void DoNativeBacktrace(PSLockRef aLock,
+                              const RegisteredThread& aRegisteredThread,
+                              const Registers& aRegs,
+                              NativeStack& aNativeStack) {
+  // This method determines which stackwalker is used for periodic and
+  // synchronous samples. (Backtrace samples are treated differently, see
+  // profiler_suspend_and_sample_thread() for details). The only part of the
+  // ordering that matters is that LUL must precede FRAME_POINTER, because on
+  // Linux they can both be present.
+#  if defined(USE_LUL_STACKWALK)
+  DoLULBacktrace(aLock, aRegisteredThread, aRegs, aNativeStack);
+#  elif defined(USE_EHABI_STACKWALK)
+  DoEHABIBacktrace(aLock, aRegisteredThread, aRegs, aNativeStack);
+#  elif defined(USE_FRAME_POINTER_STACK_WALK)
+  DoFramePointerBacktrace(aLock, aRegisteredThread, aRegs, aNativeStack);
+#  elif defined(USE_MOZ_STACK_WALK)
+  DoMozStackWalkBacktrace(aLock, aRegisteredThread, aRegs, aNativeStack);
+#  else
+#    error "Invalid configuration"
+#  endif
+}
+#endif
+
+// Writes some components shared by periodic and synchronous profiles to
+// ActivePS's ProfileBuffer. (This should only be called from DoSyncSample()
+// and DoPeriodicSample().)
+//
+// The grammar for entry sequences is in a comment above
+// ProfileBuffer::StreamSamplesToJSON.
+static inline void DoSharedSample(
+    PSLockRef aLock, bool aIsSynchronous, RegisteredThread& aRegisteredThread,
+    const Registers& aRegs, uint64_t aSamplePos, uint64_t aBufferRangeStart,
+    ProfileBuffer& aBuffer,
+    StackCaptureOptions aCaptureOptions = StackCaptureOptions::Full) {
+  // WARNING: this function runs within the profiler's "critical section".
+
+  MOZ_ASSERT(!aBuffer.IsThreadSafe(),
+             "Mutexes cannot be used inside this critical section");
+
+  MOZ_RELEASE_ASSERT(ActivePS::Exists(aLock));
+
+  ProfileBufferCollector collector(aBuffer, aSamplePos, aBufferRangeStart);
+  NativeStack nativeStack;
+#if defined(HAVE_NATIVE_UNWIND)
+  if (ActivePS::FeatureStackWalk(aLock) &&
+      aCaptureOptions == StackCaptureOptions::Full) {
+    DoNativeBacktrace(aLock, aRegisteredThread, aRegs, nativeStack);
+
+    MergeStacks(ActivePS::Features(aLock), aIsSynchronous, aRegisteredThread,
+                aRegs, nativeStack, collector);
+  } else
+#endif
+  {
+    MergeStacks(ActivePS::Features(aLock), aIsSynchronous, aRegisteredThread,
+                aRegs, nativeStack, collector);
+
+    // We can't walk the whole native stack, but we can record the top frame.
+    if (aCaptureOptions == StackCaptureOptions::Full) {
+      aBuffer.AddEntry(ProfileBufferEntry::NativeLeafAddr((void*)aRegs.mPC));
+    }
+  }
+}
+
+// Writes the components of a synchronous sample to the given ProfileBuffer.
+static void DoSyncSample(PSLockRef aLock, RegisteredThread& aRegisteredThread,
+                         const TimeStamp& aNow, const Registers& aRegs,
+                         ProfileBuffer& aBuffer,
+                         StackCaptureOptions aCaptureOptions) {
+  // WARNING: this function runs within the profiler's "critical section".
+
+  MOZ_ASSERT(aCaptureOptions != StackCaptureOptions::NoStack,
+             "DoSyncSample should not be called when no capture is needed");
+
+  const uint64_t bufferRangeStart = aBuffer.BufferRangeStart();
+
+  const uint64_t samplePos =
+      aBuffer.AddThreadIdEntry(aRegisteredThread.Info()->ThreadId());
+
+  TimeDuration delta = aNow - CorePS::ProcessStartTime();
+  aBuffer.AddEntry(ProfileBufferEntry::Time(delta.ToMilliseconds()));
+
+  DoSharedSample(aLock, /* aIsSynchronous = */ true, aRegisteredThread, aRegs,
+                 samplePos, bufferRangeStart, aBuffer, aCaptureOptions);
+}
+
+// Writes the components of a periodic sample to ActivePS's ProfileBuffer.
+// The ThreadId entry is already written in the main ProfileBuffer, its location
+// is `aSamplePos`, we can write the rest to `aBuffer` (which may be different).
+static void DoPeriodicSample(PSLockRef aLock,
+                             RegisteredThread& aRegisteredThread,
+                             ProfiledThreadData& aProfiledThreadData,
+                             const Registers& aRegs, uint64_t aSamplePos,
+                             uint64_t aBufferRangeStart,
+                             ProfileBuffer& aBuffer) {
+  // WARNING: this function runs within the profiler's "critical section".
+
+  DoSharedSample(aLock, /* aIsSynchronous = */ false, aRegisteredThread, aRegs,
+                 aSamplePos, aBufferRangeStart, aBuffer);
+}
+
+#undef UNWINDING_REGS_HAVE_ECX_EDX
+#undef UNWINDING_REGS_HAVE_R10_R12
+#undef UNWINDING_REGS_HAVE_LR_R7
+#undef UNWINDING_REGS_HAVE_LR_R11
+
+// END sampling/unwinding code
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+// BEGIN saving/streaming code
+
+const static uint64_t kJS_MAX_SAFE_UINTEGER = +9007199254740991ULL;
+
+static int64_t SafeJSInteger(uint64_t aValue) {
+  return aValue <= kJS_MAX_SAFE_UINTEGER ? int64_t(aValue) : -1;
+}
+
+static void AddSharedLibraryInfoToStream(JSONWriter& aWriter,
+                                         const SharedLibrary& aLib) {
+  aWriter.StartObjectElement();
+  aWriter.IntProperty("start", SafeJSInteger(aLib.GetStart()));
+  aWriter.IntProperty("end", SafeJSInteger(aLib.GetEnd()));
+  aWriter.IntProperty("offset", SafeJSInteger(aLib.GetOffset()));
+  aWriter.StringProperty("name", aLib.GetModuleName());
+  aWriter.StringProperty("path", aLib.GetModulePath());
+  aWriter.StringProperty("debugName", aLib.GetDebugName());
+  aWriter.StringProperty("debugPath", aLib.GetDebugPath());
+  aWriter.StringProperty("breakpadId", aLib.GetBreakpadId());
+  aWriter.StringProperty("codeId", aLib.GetCodeId());
+  aWriter.StringProperty("arch", aLib.GetArch());
+  aWriter.EndObject();
+}
+
+void AppendSharedLibraries(JSONWriter& aWriter) {
+  SharedLibraryInfo info = SharedLibraryInfo::GetInfoForSelf();
+  info.SortByAddress();
+  for (size_t i = 0; i < info.GetSize(); i++) {
+    AddSharedLibraryInfoToStream(aWriter, info.GetEntry(i));
+  }
+}
+
+static void StreamCategories(SpliceableJSONWriter& aWriter) {
+  // Same order as ProfilingCategory. Format:
+  // [
+  //   {
+  //     name: "Idle",
+  //     color: "transparent",
+  //     subcategories: ["Other"],
+  //   },
+  //   {
+  //     name: "Other",
+  //     color: "grey",
+  //     subcategories: [
+  //       "JSM loading",
+  //       "Subprocess launching",
+  //       "DLL loading"
+  //     ]
+  //   },
+  //   ...
+  // ]
+
+#define CATEGORY_JSON_BEGIN_CATEGORY(name, labelAsString, color) \
+  aWriter.Start();                                               \
+  aWriter.StringProperty("name", labelAsString);                 \
+  aWriter.StringProperty("color", color);                        \
+  aWriter.StartArrayProperty("subcategories");
+#define CATEGORY_JSON_SUBCATEGORY(supercategory, name, labelAsString) \
+  aWriter.StringElement(labelAsString);
+#define CATEGORY_JSON_END_CATEGORY \
+  aWriter.EndArray();              \
+  aWriter.EndObject();
+
+  MOZ_PROFILING_CATEGORY_LIST(CATEGORY_JSON_BEGIN_CATEGORY,
+                              CATEGORY_JSON_SUBCATEGORY,
+                              CATEGORY_JSON_END_CATEGORY)
+
+#undef CATEGORY_JSON_BEGIN_CATEGORY
+#undef CATEGORY_JSON_SUBCATEGORY
+#undef CATEGORY_JSON_END_CATEGORY
+}
+
+static void StreamMarkerSchema(SpliceableJSONWriter& aWriter) {
+  // Get an array view with all registered marker-type-specific functions.
+  base_profiler_markers_detail::Streaming::LockedMarkerTypeFunctionsList
+      markerTypeFunctionsArray;
+  // List of streamed marker names, this is used to spot duplicates.
+  std::set<std::string> names;
+  // Stream the display schema for each different one. (Duplications may come
+  // from the same code potentially living in different libraries.)
+  for (const auto& markerTypeFunctions : markerTypeFunctionsArray) {
+    auto name = markerTypeFunctions.mMarkerTypeNameFunction();
+    // std::set.insert(T&&) returns a pair, its `second` is true if the element
+    // was actually inserted (i.e., it was not there yet.)
+    const bool didInsert =
+        names.insert(std::string(name.data(), name.size())).second;
+    if (didInsert) {
+      markerTypeFunctions.mMarkerSchemaFunction().Stream(aWriter, name);
+    }
+  }
+}
+
+static int64_t MicrosecondsSince1970();
+
+static void StreamMetaJSCustomObject(PSLockRef aLock,
+                                     SpliceableJSONWriter& aWriter,
+                                     bool aIsShuttingDown) {
+  MOZ_RELEASE_ASSERT(CorePS::Exists() && ActivePS::Exists(aLock));
+
+  aWriter.IntProperty("version", GECKO_PROFILER_FORMAT_VERSION);
+
+  // The "startTime" field holds the number of milliseconds since midnight
+  // January 1, 1970 GMT. This grotty code computes (Now - (Now -
+  // ProcessStartTime)) to convert CorePS::ProcessStartTime() into that form.
+  // Note: This is the only absolute time in the profile! All other timestamps
+  // are relative to this startTime.
+  TimeDuration delta = TimeStamp::Now() - CorePS::ProcessStartTime();
+  aWriter.DoubleProperty(
+      "startTime", MicrosecondsSince1970() / 1000.0 - delta.ToMilliseconds());
+
+  aWriter.DoubleProperty("profilingStartTime", (ActivePS::ProfilingStartTime() -
+                                                CorePS::ProcessStartTime())
+                                                   .ToMilliseconds());
+
+  if (const TimeStamp contentEarliestTime =
+          ActivePS::Buffer(aLock)
+              .UnderlyingChunkedBuffer()
+              .GetEarliestChunkStartTimeStamp();
+      !contentEarliestTime.IsNull()) {
+    aWriter.DoubleProperty(
+        "contentEarliestTime",
+        (contentEarliestTime - CorePS::ProcessStartTime()).ToMilliseconds());
+  } else {
+    aWriter.NullProperty("contentEarliestTime");
+  }
+
+  const double profilingEndTime = profiler_time();
+  aWriter.DoubleProperty("profilingEndTime", profilingEndTime);
+
+  if (aIsShuttingDown) {
+    aWriter.DoubleProperty("shutdownTime", profilingEndTime);
+  } else {
+    aWriter.NullProperty("shutdownTime");
+  }
+
+  aWriter.StartArrayProperty("categories");
+  StreamCategories(aWriter);
+  aWriter.EndArray();
+
+  aWriter.StartArrayProperty("markerSchema");
+  StreamMarkerSchema(aWriter);
+  aWriter.EndArray();
+
+  if (!profiler_is_main_thread()) {
+    // Leave the rest of the properties out if we're not on the main thread.
+    // At the moment, the only case in which this function is called on a
+    // background thread is if we're in a content process and are going to
+    // send this profile to the parent process. In that case, the parent
+    // process profile's "meta" object already has the rest of the properties,
+    // and the parent process profile is dumped on that process's main thread.
+    return;
+  }
+
+  aWriter.DoubleProperty("interval", ActivePS::Interval(aLock));
+  aWriter.IntProperty("stackwalk", ActivePS::FeatureStackWalk(aLock));
+
+#ifdef DEBUG
+  aWriter.IntProperty("debug", 1);
+#else
+  aWriter.IntProperty("debug", 0);
+#endif
+
+  aWriter.IntProperty("gcpoison", 0);
+
+  aWriter.IntProperty("asyncstack", 0);
+
+  aWriter.IntProperty("processType", 0);
+}
+
+static void StreamPages(PSLockRef aLock, SpliceableJSONWriter& aWriter) {
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+  ActivePS::DiscardExpiredPages(aLock);
+  for (const auto& page : ActivePS::ProfiledPages(aLock)) {
+    page->StreamJSON(aWriter);
+  }
+}
+
+static void locked_profiler_stream_json_for_this_process(
+    PSLockRef aLock, SpliceableJSONWriter& aWriter, double aSinceTime,
+    bool aIsShuttingDown, bool aOnlyThreads = false) {
+  LOG("locked_profiler_stream_json_for_this_process");
+
+  MOZ_RELEASE_ASSERT(CorePS::Exists() && ActivePS::Exists(aLock));
+
+  AUTO_PROFILER_STATS(base_locked_profiler_stream_json_for_this_process);
+
+  const double collectionStartMs = profiler_time();
+
+  ProfileBuffer& buffer = ActivePS::Buffer(aLock);
+
+  // If there is a set "Window length", discard older data.
+  Maybe<double> durationS = ActivePS::Duration(aLock);
+  if (durationS.isSome()) {
+    const double durationStartMs = collectionStartMs - *durationS * 1000;
+    buffer.DiscardSamplesBeforeTime(durationStartMs);
+  }
+
+  if (!aOnlyThreads) {
+    // Put shared library info
+    aWriter.StartArrayProperty("libs");
+    AppendSharedLibraries(aWriter);
+    aWriter.EndArray();
+
+    // Put meta data
+    aWriter.StartObjectProperty("meta");
+    { StreamMetaJSCustomObject(aLock, aWriter, aIsShuttingDown); }
+    aWriter.EndObject();
+
+    // Put page data
+    aWriter.StartArrayProperty("pages");
+    { StreamPages(aLock, aWriter); }
+    aWriter.EndArray();
+
+    buffer.StreamProfilerOverheadToJSON(aWriter, CorePS::ProcessStartTime(),
+                                        aSinceTime);
+    buffer.StreamCountersToJSON(aWriter, CorePS::ProcessStartTime(),
+                                aSinceTime);
+
+    // Lists the samples for each thread profile
+    aWriter.StartArrayProperty("threads");
+  }
+
+  // if aOnlyThreads is true, the only output will be the threads array items.
+  {
+    ActivePS::DiscardExpiredDeadProfiledThreads(aLock);
+    Vector<std::pair<RegisteredThread*, ProfiledThreadData*>> threads =
+        ActivePS::ProfiledThreads(aLock);
+    for (auto& thread : threads) {
+      ProfiledThreadData* profiledThreadData = thread.second;
+      profiledThreadData->StreamJSON(
+          buffer, aWriter, CorePS::ProcessName(aLock), CorePS::ETLDplus1(aLock),
+          CorePS::ProcessStartTime(), aSinceTime);
+    }
+  }
+
+  if (!aOnlyThreads) {
+    aWriter.EndArray();
+
+    aWriter.StartArrayProperty("pausedRanges");
+    { buffer.StreamPausedRangesToJSON(aWriter, aSinceTime); }
+    aWriter.EndArray();
+  }
+
+  const double collectionEndMs = profiler_time();
+
+  // Record timestamps for the collection into the buffer, so that consumers
+  // know why we didn't collect any samples for its duration.
+  // We put these entries into the buffer after we've collected the profile,
+  // so they'll be visible for the *next* profile collection (if they haven't
+  // been overwritten due to buffer wraparound by then).
+  buffer.AddEntry(ProfileBufferEntry::CollectionStart(collectionStartMs));
+  buffer.AddEntry(ProfileBufferEntry::CollectionEnd(collectionEndMs));
+}
+
+bool profiler_stream_json_for_this_process(SpliceableJSONWriter& aWriter,
+                                           double aSinceTime,
+                                           bool aIsShuttingDown,
+                                           bool aOnlyThreads) {
+  LOG("profiler_stream_json_for_this_process");
+
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  PSAutoLock lock;
+
+  if (!ActivePS::Exists(lock)) {
+    return false;
+  }
+
+  locked_profiler_stream_json_for_this_process(lock, aWriter, aSinceTime,
+                                               aIsShuttingDown, aOnlyThreads);
+  return true;
+}
+
+// END saving/streaming code
+////////////////////////////////////////////////////////////////////////
+
+static char FeatureCategory(uint32_t aFeature) {
+  if (aFeature & DefaultFeatures()) {
+    if (aFeature & AvailableFeatures()) {
+      return 'D';
+    }
+    return 'd';
+  }
+
+  if (aFeature & StartupExtraDefaultFeatures()) {
+    if (aFeature & AvailableFeatures()) {
+      return 'S';
+    }
+    return 's';
+  }
+
+  if (aFeature & AvailableFeatures()) {
+    return '-';
+  }
+  return 'x';
+}
+
+static void PrintUsage() {
+  PrintToConsole(
+      "\n"
+      "Profiler environment variable usage:\n"
+      "\n"
+      "  MOZ_BASE_PROFILER_HELP\n"
+      "  If set to any value, prints this message.\n"
+      "  (Only BaseProfiler features are known here; Use MOZ_PROFILER_HELP\n"
+      "  for Gecko Profiler help, with more features).\n"
+      "\n"
+      "  MOZ_BASE_PROFILER_{,DEBUG_,VERBOSE}LOGGING\n"
+      "  Enables BaseProfiler logging to stdout. The levels of logging\n"
+      "  available are MOZ_BASE_PROFILER_LOGGING' (least verbose),\n"
+      "  '..._DEBUG_LOGGING', '..._VERBOSE_LOGGING' (most verbose)\n"
+      "\n"
+      "  MOZ_PROFILER_STARTUP\n"
+      "  If set to any value other than '' or '0'/'N'/'n', starts the\n"
+      "  profiler immediately on start-up.\n"
+      "  Useful if you want profile code that runs very early.\n"
+      "\n"
+      "  MOZ_PROFILER_STARTUP_ENTRIES=<%u..%u>\n"
+      "  If MOZ_PROFILER_STARTUP is set, specifies the number of entries\n"
+      "  per process in the profiler's circular buffer when the profiler is\n"
+      "  first started.\n"
+      "  If unset, the platform default is used:\n"
+      "  %u entries per process, or %u when MOZ_PROFILER_STARTUP is set.\n"
+      "  (%u bytes per entry -> %u or %u total bytes per process)\n"
+      "  Optional units in bytes: KB, KiB, MB, MiB, GB, GiB\n"
+      "\n"
+      "  MOZ_PROFILER_STARTUP_DURATION=<1..>\n"
+      "  If MOZ_PROFILER_STARTUP is set, specifies the maximum life time\n"
+      "  of entries in the the profiler's circular buffer when the profiler\n"
+      "  is first started, in seconds.\n"
+      "  If unset, the life time of the entries will only be restricted by\n"
+      "  MOZ_PROFILER_STARTUP_ENTRIES (or its default value), and no\n"
+      "  additional time duration restriction will be applied.\n"
+      "\n"
+      "  MOZ_PROFILER_STARTUP_INTERVAL=<1..1000>\n"
+      "  If MOZ_PROFILER_STARTUP is set, specifies the sample interval,\n"
+      "  measured in milliseconds, when the profiler is first started.\n"
+      "  If unset, the platform default is used.\n"
+      "\n"
+      "  MOZ_PROFILER_STARTUP_FEATURES_BITFIELD=<Number>\n"
+      "  If MOZ_PROFILER_STARTUP is set, specifies the profiling\n"
+      "  features, as the integer value of the features bitfield.\n"
+      "  If unset, the value from MOZ_PROFILER_STARTUP_FEATURES is used.\n"
+      "\n"
+      "  MOZ_PROFILER_STARTUP_FEATURES=<Features>\n"
+      "  If MOZ_PROFILER_STARTUP is set, specifies the profiling\n"
+      "  features, as a comma-separated list of strings.\n"
+      "  Ignored if MOZ_PROFILER_STARTUP_FEATURES_BITFIELD is set.\n"
+      "  If unset, the platform default is used.\n"
+      "\n"
+      "    Features: (x=unavailable, D/d=default/unavailable,\n"
+      "               S/s=MOZ_PROFILER_STARTUP extra "
+      "default/unavailable)\n",
+      unsigned(scMinimumBufferEntries), unsigned(scMaximumBufferEntries),
+      unsigned(BASE_PROFILER_DEFAULT_ENTRIES.Value()),
+      unsigned(BASE_PROFILER_DEFAULT_STARTUP_ENTRIES.Value()),
+      unsigned(scBytesPerEntry),
+      unsigned(BASE_PROFILER_DEFAULT_ENTRIES.Value() * scBytesPerEntry),
+      unsigned(BASE_PROFILER_DEFAULT_STARTUP_ENTRIES.Value() *
+               scBytesPerEntry));
+
+#define PRINT_FEATURE(n_, str_, Name_, desc_)             \
+  PrintToConsole("    %c %7u: \"%s\" (%s)\n",             \
+                 FeatureCategory(ProfilerFeature::Name_), \
+                 ProfilerFeature::Name_, str_, desc_);
+
+  BASE_PROFILER_FOR_EACH_FEATURE(PRINT_FEATURE)
+
+#undef PRINT_FEATURE
+
+  PrintToConsole(
+      "    -          \"default\" (All above D+S defaults)\n"
+      "\n"
+      "  MOZ_PROFILER_STARTUP_FILTERS=<Filters>\n"
+      "  If MOZ_PROFILER_STARTUP is set, specifies the thread filters, as "
+      "a\n"
+      "  comma-separated list of strings. A given thread will be sampled if\n"
+      "  any of the filters is a case-insensitive substring of the thread\n"
+      "  name. If unset, a default is used.\n"
+      "\n"
+      "  MOZ_PROFILER_SHUTDOWN\n"
+      "  If set, the profiler saves a profile to the named file on shutdown.\n"
+      "\n"
+      "  MOZ_PROFILER_SYMBOLICATE\n"
+      "  If set, the profiler will pre-symbolicate profiles.\n"
+      "  *Note* This will add a significant pause when gathering data, and\n"
+      "  is intended mainly for local development.\n"
+      "\n"
+      "  MOZ_PROFILER_LUL_TEST\n"
+      "  If set to any value, runs LUL unit tests at startup.\n"
+      "\n"
+      "  This platform %s native unwinding.\n"
+      "\n",
+#if defined(HAVE_NATIVE_UNWIND)
+      "supports"
+#else
+      "does not support"
+#endif
+  );
+}
+
+////////////////////////////////////////////////////////////////////////
+// BEGIN Sampler
+
+#if defined(GP_OS_linux) || defined(GP_OS_android)
+struct SigHandlerCoordinator;
+#endif
+
+// Sampler performs setup and teardown of the state required to sample with the
+// profiler. Sampler may exist when ActivePS is not present.
+//
+// SuspendAndSampleAndResumeThread must only be called from a single thread,
+// and must not sample the thread it is being called from. A separate Sampler
+// instance must be used for each thread which wants to capture samples.
+
+// WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
+//
+// With the exception of SamplerThread, all Sampler objects must be Disable-d
+// before releasing the lock which was used to create them. This avoids races
+// on linux with the SIGPROF signal handler.
+
+class Sampler {
+ public:
+  // Sets up the profiler such that it can begin sampling.
+  explicit Sampler(PSLockRef aLock);
+
+  // Disable the sampler, restoring it to its previous state. This must be
+  // called once, and only once, before the Sampler is destroyed.
+  void Disable(PSLockRef aLock);
+
+  // This method suspends and resumes the samplee thread. It calls the passed-in
+  // function-like object aProcessRegs (passing it a populated |const
+  // Registers&| arg) while the samplee thread is suspended.
+  //
+  // Func must be a function-like object of type `void()`.
+  template <typename Func>
+  void SuspendAndSampleAndResumeThread(
+      PSLockRef aLock, const RegisteredThread& aRegisteredThread,
+      const TimeStamp& aNow, const Func& aProcessRegs);
+
+ private:
+#if defined(GP_OS_linux) || defined(GP_OS_android) || defined(GP_OS_freebsd)
+  // Used to restore the SIGPROF handler when ours is removed.
+  struct sigaction mOldSigprofHandler;
+
+  // This process' ID. Needed as an argument for tgkill in
+  // SuspendAndSampleAndResumeThread.
+  BaseProfilerProcessId mMyPid;
+
+  // The sampler thread's ID.  Used to assert that it is not sampling itself,
+  // which would lead to deadlock.
+  BaseProfilerThreadId mSamplerTid;
+
+ public:
+  // This is the one-and-only variable used to communicate between the sampler
+  // thread and the samplee thread's signal handler. It's static because the
+  // samplee thread's signal handler is static.
+  static struct SigHandlerCoordinator* sSigHandlerCoordinator;
+#endif
+};
+
+// END Sampler
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+// BEGIN SamplerThread
+
+// The sampler thread controls sampling and runs whenever the profiler is
+// active. It periodically runs through all registered threads, finds those
+// that should be sampled, then pauses and samples them.
+
+class SamplerThread {
+ public:
+  // Creates a sampler thread, but doesn't start it.
+  SamplerThread(PSLockRef aLock, uint32_t aActivityGeneration,
+                double aIntervalMilliseconds, uint32_t aFeatures);
+  ~SamplerThread();
+
+  // This runs on (is!) the sampler thread.
+  void Run();
+
+  // This runs on the main thread.
+  void Stop(PSLockRef aLock);
+
+ private:
+  // This suspends the calling thread for the given number of microseconds.
+  // Best effort timing.
+  void SleepMicro(uint32_t aMicroseconds);
+
+  // The sampler used to suspend and sample threads.
+  Sampler mSampler;
+
+  // The activity generation, for detecting when the sampler thread must stop.
+  const uint32_t mActivityGeneration;
+
+  // The interval between samples, measured in microseconds.
+  const int mIntervalMicroseconds;
+
+  // The OS-specific handle for the sampler thread.
+#if defined(GP_OS_windows)
+  HANDLE mThread;
+#elif defined(GP_OS_darwin) || defined(GP_OS_linux) || \
+    defined(GP_OS_android) || defined(GP_OS_freebsd)
+  pthread_t mThread;
+#endif
+
+#if defined(GP_OS_windows)
+  bool mNoTimerResolutionChange = true;
+#endif
+
+  SamplerThread(const SamplerThread&) = delete;
+  void operator=(const SamplerThread&) = delete;
+};
+
+// This function is required because we need to create a SamplerThread within
+// ActivePS's constructor, but SamplerThread is defined after ActivePS. It
+// could probably be removed by moving some code around.
+static SamplerThread* NewSamplerThread(PSLockRef aLock, uint32_t aGeneration,
+                                       double aInterval, uint32_t aFeatures) {
+  return new SamplerThread(aLock, aGeneration, aInterval, aFeatures);
+}
+
+// This function is the sampler thread.  This implementation is used for all
+// targets.
+void SamplerThread::Run() {
+  // TODO: If possible, name this thread later on, after NSPR becomes available.
+  // PR_SetCurrentThreadName("SamplerThread");
+
+  // Features won't change during this SamplerThread's lifetime, so we can read
+  // them once and store them locally.
+  const uint32_t features = []() -> uint32_t {
+    PSAutoLock lock;
+    if (!ActivePS::Exists(lock)) {
+      // If there is no active profiler, it doesn't matter what we return,
+      // because this thread will exit before any feature is used.
+      return 0;
+    }
+    return ActivePS::Features(lock);
+  }();
+
+  // Not *no*-stack-sampling means we do want stack sampling.
+  const bool stackSampling = !ProfilerFeature::HasNoStackSampling(features);
+
+  // Use local ProfileBuffer to capture the stack.
+  // (This is to avoid touching the CorePS::CoreBuffer lock while
+  // a thread is suspended, because that thread could be working with
+  // the CorePS::CoreBuffer as well.)
+  ProfileBufferChunkManagerSingle localChunkManager(
+      ProfileBufferChunkManager::scExpectedMaximumStackSize);
+  ProfileChunkedBuffer localBuffer(
+      ProfileChunkedBuffer::ThreadSafety::WithoutMutex, localChunkManager);
+  ProfileBuffer localProfileBuffer(localBuffer);
+
+  // Will be kept between collections, to know what each collection does.
+  auto previousState = localBuffer.GetState();
+
+  // This will be positive if we are running behind schedule (sampling less
+  // frequently than desired) and negative if we are ahead of schedule.
+  TimeDuration lastSleepOvershoot = 0;
+  TimeStamp sampleStart = TimeStamp::Now();
+
+  while (true) {
+    // This scope is for |lock|. It ends before we sleep below.
+    {
+      PSAutoLock lock;
+      TimeStamp lockAcquired = TimeStamp::Now();
+
+      if (!ActivePS::Exists(lock)) {
+        return;
+      }
+
+      // At this point profiler_stop() might have been called, and
+      // profiler_start() might have been called on another thread. If this
+      // happens the generation won't match.
+      if (ActivePS::Generation(lock) != mActivityGeneration) {
+        return;
+      }
+
+      ActivePS::ClearExpiredExitProfiles(lock);
+
+      TimeStamp expiredMarkersCleaned = TimeStamp::Now();
+
+      if (int(gSkipSampling) <= 0 && !ActivePS::IsSamplingPaused(lock)) {
+        TimeDuration delta = sampleStart - CorePS::ProcessStartTime();
+        ProfileBuffer& buffer = ActivePS::Buffer(lock);
+
+        // handle per-process generic counters
+        const Vector<BaseProfilerCount*>& counters = CorePS::Counters(lock);
+        for (auto& counter : counters) {
+          // create Buffer entries for each counter
+          buffer.AddEntry(ProfileBufferEntry::CounterId(counter));
+          buffer.AddEntry(ProfileBufferEntry::Time(delta.ToMilliseconds()));
+          int64_t count;
+          uint64_t number;
+          counter->Sample(count, number);
+          buffer.AddEntry(ProfileBufferEntry::Count(count));
+          if (number) {
+            buffer.AddEntry(ProfileBufferEntry::Number(number));
+          }
+        }
+        TimeStamp countersSampled = TimeStamp::Now();
+
+        if (stackSampling) {
+          const Vector<LiveProfiledThreadData>& liveThreads =
+              ActivePS::LiveProfiledThreads(lock);
+
+          for (auto& thread : liveThreads) {
+            RegisteredThread* registeredThread = thread.mRegisteredThread;
+            ProfiledThreadData* profiledThreadData =
+                thread.mProfiledThreadData.get();
+            RefPtr<ThreadInfo> info = registeredThread->Info();
+
+            // If the thread is asleep and has been sampled before in the same
+            // sleep episode, find and copy the previous sample, as that's
+            // cheaper than taking a new sample.
+            if (registeredThread->RacyRegisteredThread()
+                    .CanDuplicateLastSampleDueToSleep()) {
+              bool dup_ok = ActivePS::Buffer(lock).DuplicateLastSample(
+                  info->ThreadId(), CorePS::ProcessStartTime(),
+                  profiledThreadData->LastSample());
+              if (dup_ok) {
+                continue;
+              }
+            }
+
+            AUTO_PROFILER_STATS(base_SamplerThread_Run_DoPeriodicSample);
+
+            TimeStamp now = TimeStamp::Now();
+
+            // Record the global profiler buffer's range start now, before
+            // adding the first entry for this thread's sample.
+            const uint64_t bufferRangeStart = buffer.BufferRangeStart();
+
+            // Add the thread ID now, so we know its position in the main
+            // buffer, which is used by some JS data. (DoPeriodicSample only
+            // knows about the temporary local buffer.)
+            const uint64_t samplePos =
+                buffer.AddThreadIdEntry(registeredThread->Info()->ThreadId());
+            profiledThreadData->LastSample() = Some(samplePos);
+
+            // Also add the time, so it's always there after the thread ID, as
+            // expected by the parser. (Other stack data is optional.)
+            TimeDuration delta = now - CorePS::ProcessStartTime();
+            buffer.AddEntry(ProfileBufferEntry::Time(delta.ToMilliseconds()));
+
+            mSampler.SuspendAndSampleAndResumeThread(
+                lock, *registeredThread, now,
+                [&](const Registers& aRegs, const TimeStamp& aNow) {
+                  DoPeriodicSample(lock, *registeredThread, *profiledThreadData,
+                                   aRegs, samplePos, bufferRangeStart,
+                                   localProfileBuffer);
+                });
+
+            // If data is complete, copy it into the global buffer.
+            auto state = localBuffer.GetState();
+            if (state.mClearedBlockCount != previousState.mClearedBlockCount) {
+              LOG("Stack sample too big for local storage, needed %u bytes",
+                  unsigned(state.mRangeEnd - previousState.mRangeEnd));
+            } else if (state.mRangeEnd - previousState.mRangeEnd >=
+                       *profiler_get_core_buffer().BufferLength()) {
+              LOG("Stack sample too big for profiler storage, needed %u bytes",
+                  unsigned(state.mRangeEnd - previousState.mRangeEnd));
+            } else {
+              profiler_get_core_buffer().AppendContents(localBuffer);
+            }
+
+            // Clean up for the next run.
+            localBuffer.Clear();
+            previousState = localBuffer.GetState();
+          }
+        }
+
+#if defined(USE_LUL_STACKWALK)
+        // The LUL unwind object accumulates frame statistics. Periodically we
+        // should poke it to give it a chance to print those statistics.  This
+        // involves doing I/O (fprintf, __android_log_print, etc.) and so
+        // can't safely be done from the critical section inside
+        // SuspendAndSampleAndResumeThread, which is why it is done here.
+        lul::LUL* lul = CorePS::Lul(lock);
+        if (lul) {
+          lul->MaybeShowStats();
+        }
+#endif
+        TimeStamp threadsSampled = TimeStamp::Now();
+
+        {
+          AUTO_PROFILER_STATS(Sampler_FulfillChunkRequests);
+          ActivePS::FulfillChunkRequests(lock);
+        }
+
+        buffer.CollectOverheadStats(delta, lockAcquired - sampleStart,
+                                    expiredMarkersCleaned - lockAcquired,
+                                    countersSampled - expiredMarkersCleaned,
+                                    threadsSampled - countersSampled);
+      }
+    }
+    // gPSMutex is not held after this point.
+
+    // Calculate how long a sleep to request.  After the sleep, measure how
+    // long we actually slept and take the difference into account when
+    // calculating the sleep interval for the next iteration.  This is an
+    // attempt to keep "to schedule" in the presence of inaccuracy of the
+    // actual sleep intervals.
+    TimeStamp targetSleepEndTime =
+        sampleStart + TimeDuration::FromMicroseconds(mIntervalMicroseconds);
+    TimeStamp beforeSleep = TimeStamp::Now();
+    TimeDuration targetSleepDuration = targetSleepEndTime - beforeSleep;
+    double sleepTime = std::max(
+        0.0, (targetSleepDuration - lastSleepOvershoot).ToMicroseconds());
+    SleepMicro(static_cast<uint32_t>(sleepTime));
+    sampleStart = TimeStamp::Now();
+    lastSleepOvershoot =
+        sampleStart - (beforeSleep + TimeDuration::FromMicroseconds(sleepTime));
+  }
+}
+
+// Temporary closing namespaces from enclosing platform.cpp.
+}  // namespace baseprofiler
+}  // namespace mozilla
+
+// We #include these files directly because it means those files can use
+// declarations from this file trivially.  These provide target-specific
+// implementations of all SamplerThread methods except Run().
+#if defined(GP_OS_windows)
+#  include "platform-win32.cpp"
+#elif defined(GP_OS_darwin)
+#  include "platform-macos.cpp"
+#elif defined(GP_OS_linux) || defined(GP_OS_android) || defined(GP_OS_freebsd)
+#  include "platform-linux-android.cpp"
+#else
+#  error "bad platform"
+#endif
+
+namespace mozilla {
+namespace baseprofiler {
+
+UniquePlatformData AllocPlatformData(BaseProfilerThreadId aThreadId) {
+  return UniquePlatformData(new PlatformData(aThreadId));
+}
+
+void PlatformDataDestructor::operator()(PlatformData* aData) { delete aData; }
+
+// END SamplerThread
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+// BEGIN externally visible functions
+
+static uint32_t ParseFeature(const char* aFeature, bool aIsStartup) {
+  if (strcmp(aFeature, "default") == 0) {
+    return (aIsStartup ? (DefaultFeatures() | StartupExtraDefaultFeatures())
+                       : DefaultFeatures()) &
+           AvailableFeatures();
+  }
+
+#define PARSE_FEATURE_BIT(n_, str_, Name_, desc_) \
+  if (strcmp(aFeature, str_) == 0) {              \
+    return ProfilerFeature::Name_;                \
+  }
+
+  BASE_PROFILER_FOR_EACH_FEATURE(PARSE_FEATURE_BIT)
+
+#undef PARSE_FEATURE_BIT
+
+  PrintToConsole("\nUnrecognized feature \"%s\".\n\n", aFeature);
+  // Since we may have an old feature we don't implement anymore, don't exit.
+  PrintUsage();
+  return 0;
+}
+
+uint32_t ParseFeaturesFromStringArray(const char** aFeatures,
+                                      uint32_t aFeatureCount,
+                                      bool aIsStartup /* = false */) {
+  uint32_t features = 0;
+  for (size_t i = 0; i < aFeatureCount; i++) {
+    features |= ParseFeature(aFeatures[i], aIsStartup);
+  }
+  return features;
+}
+
+// Find the RegisteredThread for the current thread. This should only be called
+// in places where TLSRegisteredThread can't be used.
+static RegisteredThread* FindCurrentThreadRegisteredThread(PSLockRef aLock) {
+  BaseProfilerThreadId id = profiler_current_thread_id();
+  const Vector<UniquePtr<RegisteredThread>>& registeredThreads =
+      CorePS::RegisteredThreads(aLock);
+  for (auto& registeredThread : registeredThreads) {
+    if (registeredThread->Info()->ThreadId() == id) {
+      return registeredThread.get();
+    }
+  }
+
+  return nullptr;
+}
+
+static ProfilingStack* locked_register_thread(PSLockRef aLock,
+                                              const char* aName,
+                                              void* aStackTop) {
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  MOZ_ASSERT(!FindCurrentThreadRegisteredThread(aLock));
+
+  VTUNE_REGISTER_THREAD(aName);
+
+  if (!TLSRegisteredThread::Init(aLock)) {
+    return nullptr;
+  }
+
+  RefPtr<ThreadInfo> info = new ThreadInfo(aName, profiler_current_thread_id(),
+                                           profiler_is_main_thread());
+  UniquePtr<RegisteredThread> registeredThread =
+      MakeUnique<RegisteredThread>(info, aStackTop);
+
+  TLSRegisteredThread::SetRegisteredThread(aLock, registeredThread.get());
+
+  if (ActivePS::Exists(aLock) && ActivePS::ShouldProfileThread(aLock, info)) {
+    registeredThread->RacyRegisteredThread().SetIsBeingProfiled(true);
+    ActivePS::AddLiveProfiledThread(aLock, registeredThread.get(),
+                                    MakeUnique<ProfiledThreadData>(info));
+  }
+
+  ProfilingStack* profilingStack =
+      &registeredThread->RacyRegisteredThread().ProfilingStack();
+
+  CorePS::AppendRegisteredThread(aLock, std::move(registeredThread));
+
+  return profilingStack;
+}
+
+static void locked_profiler_start(PSLockRef aLock, PowerOfTwo32 aCapacity,
+                                  double aInterval, uint32_t aFeatures,
+                                  const char** aFilters, uint32_t aFilterCount,
+                                  const Maybe<double>& aDuration);
+
+static Vector<const char*> SplitAtCommas(const char* aString,
+                                         UniquePtr<char[]>& aStorage) {
+  size_t len = strlen(aString);
+  aStorage = MakeUnique<char[]>(len + 1);
+  PodCopy(aStorage.get(), aString, len + 1);
+
+  // Iterate over all characters in aStorage and split at commas, by
+  // overwriting commas with the null char.
+  Vector<const char*> array;
+  size_t currentElementStart = 0;
+  for (size_t i = 0; i <= len; i++) {
+    if (aStorage[i] == ',') {
+      aStorage[i] = '\0';
+    }
+    if (aStorage[i] == '\0') {
+      // Only add non-empty elements, otherwise ParseFeatures would later
+      // complain about unrecognized features.
+      if (currentElementStart != i) {
+        MOZ_RELEASE_ASSERT(array.append(&aStorage[currentElementStart]));
+      }
+      currentElementStart = i + 1;
+    }
+  }
+  return array;
+}
+
+static const char* get_size_suffix(const char* str) {
+  const char* ptr = str;
+
+  while (isdigit(*ptr)) {
+    ptr++;
+  }
+
+  return ptr;
+}
+
+void profiler_init(void* aStackTop) {
+  LOG("profiler_init");
+
+  profiler_init_main_thread_id();
+
+  VTUNE_INIT();
+
+  MOZ_RELEASE_ASSERT(!CorePS::Exists());
+
+  if (getenv("MOZ_BASE_PROFILER_HELP")) {
+    PrintUsage();
+    exit(0);
+  }
+
+  SharedLibraryInfo::Initialize();
+
+  uint32_t features = DefaultFeatures() & AvailableFeatures();
+
+  UniquePtr<char[]> filterStorage;
+
+  Vector<const char*> filters;
+  MOZ_RELEASE_ASSERT(filters.append(kMainThreadName));
+
+  PowerOfTwo32 capacity = BASE_PROFILER_DEFAULT_ENTRIES;
+  Maybe<double> duration = Nothing();
+  double interval = BASE_PROFILER_DEFAULT_INTERVAL;
+
+  {
+    PSAutoLock lock;
+
+    // We've passed the possible failure point. Instantiate CorePS, which
+    // indicates that the profiler has initialized successfully.
+    CorePS::Create(lock);
+
+    Unused << locked_register_thread(lock, kMainThreadName, aStackTop);
+
+    // Platform-specific initialization.
+    PlatformInit(lock);
+
+    // (Linux-only) We could create CorePS::mLul and read unwind info into it
+    // at this point. That would match the lifetime implied by destruction of
+    // it in profiler_shutdown() just below. However, that gives a big delay on
+    // startup, even if no profiling is actually to be done. So, instead, it is
+    // created on demand at the first call to PlatformStart().
+
+    const char* startupEnv = getenv("MOZ_PROFILER_STARTUP");
+    if (!startupEnv || startupEnv[0] == '\0' ||
+        ((startupEnv[0] == '0' || startupEnv[0] == 'N' ||
+          startupEnv[0] == 'n') &&
+         startupEnv[1] == '\0')) {
+      return;
+    }
+
+    // Hidden option to stop Base Profiler, mostly due to Talos intermittents,
+    // see https://bugzilla.mozilla.org/show_bug.cgi?id=1638851#c3
+    // TODO: Investigate root cause and remove this in bugs 1648324 and 1648325.
+    if (getenv("MOZ_PROFILER_STARTUP_NO_BASE")) {
+      return;
+    }
+
+    LOG("- MOZ_PROFILER_STARTUP is set");
+
+    // Startup default capacity may be different.
+    capacity = BASE_PROFILER_DEFAULT_STARTUP_ENTRIES;
+
+    const char* startupCapacity = getenv("MOZ_PROFILER_STARTUP_ENTRIES");
+    if (startupCapacity && startupCapacity[0] != '\0') {
+      errno = 0;
+      long capacityLong = strtol(startupCapacity, nullptr, 10);
+      std::string_view sizeSuffix = get_size_suffix(startupCapacity);
+
+      if (sizeSuffix == "KB") {
+        capacityLong *= 1000 / scBytesPerEntry;
+      } else if (sizeSuffix == "KiB") {
+        capacityLong *= 1024 / scBytesPerEntry;
+      } else if (sizeSuffix == "MB") {
+        capacityLong *= (1000 * 1000) / scBytesPerEntry;
+      } else if (sizeSuffix == "MiB") {
+        capacityLong *= (1024 * 1024) / scBytesPerEntry;
+      } else if (sizeSuffix == "GB") {
+        capacityLong *= (1000 * 1000 * 1000) / scBytesPerEntry;
+      } else if (sizeSuffix == "GiB") {
+        capacityLong *= (1024 * 1024 * 1024) / scBytesPerEntry;
+      } else if (!sizeSuffix.empty()) {
+        PrintToConsole(
+            "- MOZ_PROFILER_STARTUP_ENTRIES unit must be one of the "
+            "following: KB, KiB, MB, MiB, GB, GiB");
+        PrintUsage();
+        exit(1);
+      }
+
+      // `long` could be 32 or 64 bits, so we force a 64-bit comparison with
+      // the maximum 32-bit signed number (as more than that is clamped down to
+      // 2^31 anyway).
+      if (errno == 0 && capacityLong > 0 &&
+          static_cast<uint64_t>(capacityLong) <=
+              static_cast<uint64_t>(INT32_MAX)) {
+        capacity = PowerOfTwo32(
+            ClampToAllowedEntries(static_cast<uint32_t>(capacityLong)));
+        LOG("- MOZ_PROFILER_STARTUP_ENTRIES = %u", unsigned(capacity.Value()));
+      } else {
+        PrintToConsole("- MOZ_PROFILER_STARTUP_ENTRIES not a valid integer: %s",
+                       startupCapacity);
+        PrintUsage();
+        exit(1);
+      }
+    }
+
+    const char* startupDuration = getenv("MOZ_PROFILER_STARTUP_DURATION");
+    if (startupDuration && startupDuration[0] != '\0') {
+      // The duration is a floating point number. Use StringToDouble rather than
+      // strtod, so that "." is used as the decimal separator regardless of OS
+      // locale.
+      auto durationVal = StringToDouble(std::string(startupDuration));
+      if (durationVal && *durationVal >= 0.0) {
+        if (*durationVal > 0.0) {
+          duration = Some(*durationVal);
+        }
+        LOG("- MOZ_PROFILER_STARTUP_DURATION = %f", *durationVal);
+      } else {
+        PrintToConsole("- MOZ_PROFILER_STARTUP_DURATION not a valid float: %s",
+                       startupDuration);
+        PrintUsage();
+        exit(1);
+      }
+    }
+
+    const char* startupInterval = getenv("MOZ_PROFILER_STARTUP_INTERVAL");
+    if (startupInterval && startupInterval[0] != '\0') {
+      // The interval is a floating point number. Use StringToDouble rather than
+      // strtod, so that "." is used as the decimal separator regardless of OS
+      // locale.
+      auto intervalValue = StringToDouble(MakeStringSpan(startupInterval));
+      if (intervalValue && *intervalValue > 0.0 && *intervalValue <= 1000.0) {
+        interval = *intervalValue;
+        LOG("- MOZ_PROFILER_STARTUP_INTERVAL = %f", interval);
+      } else {
+        PrintToConsole("- MOZ_PROFILER_STARTUP_INTERVAL not a valid float: %s",
+                       startupInterval);
+        PrintUsage();
+        exit(1);
+      }
+    }
+
+    features |= StartupExtraDefaultFeatures() & AvailableFeatures();
+
+    const char* startupFeaturesBitfield =
+        getenv("MOZ_PROFILER_STARTUP_FEATURES_BITFIELD");
+    if (startupFeaturesBitfield && startupFeaturesBitfield[0] != '\0') {
+      errno = 0;
+      features = strtol(startupFeaturesBitfield, nullptr, 10);
+      if (errno == 0) {
+        LOG("- MOZ_PROFILER_STARTUP_FEATURES_BITFIELD = %d", features);
+      } else {
+        PrintToConsole(
+            "- MOZ_PROFILER_STARTUP_FEATURES_BITFIELD not a valid integer: %s",
+            startupFeaturesBitfield);
+        PrintUsage();
+        exit(1);
+      }
+    } else {
+      const char* startupFeatures = getenv("MOZ_PROFILER_STARTUP_FEATURES");
+      if (startupFeatures) {
+        // Interpret startupFeatures as a list of feature strings, separated by
+        // commas.
+        UniquePtr<char[]> featureStringStorage;
+        Vector<const char*> featureStringArray =
+            SplitAtCommas(startupFeatures, featureStringStorage);
+        features = ParseFeaturesFromStringArray(featureStringArray.begin(),
+                                                featureStringArray.length(),
+                                                /* aIsStartup */ true);
+        LOG("- MOZ_PROFILER_STARTUP_FEATURES = %d", features);
+      }
+    }
+
+    const char* startupFilters = getenv("MOZ_PROFILER_STARTUP_FILTERS");
+    if (startupFilters && startupFilters[0] != '\0') {
+      filters = SplitAtCommas(startupFilters, filterStorage);
+      LOG("- MOZ_PROFILER_STARTUP_FILTERS = %s", startupFilters);
+
+      if (mozilla::profiler::detail::FiltersExcludePid(filters)) {
+        LOG(" -> This process is excluded and won't be profiled");
+        return;
+      }
+    }
+
+    locked_profiler_start(lock, capacity, interval, features, filters.begin(),
+                          filters.length(), duration);
+  }
+
+  // TODO: Install memory counter if it is possible from mozglue.
+  // #if defined(MOZ_REPLACE_MALLOC) && defined(MOZ_PROFILER_MEMORY)
+  //   // start counting memory allocations (outside of lock because this may
+  //   call
+  //   // profiler_add_sampled_counter which would attempt to take the lock.)
+  //   mozilla::profiler::install_memory_counter(true);
+  // #endif
+}
+
+static void locked_profiler_save_profile_to_file(PSLockRef aLock,
+                                                 const char* aFilename,
+                                                 bool aIsShuttingDown);
+
+static SamplerThread* locked_profiler_stop(PSLockRef aLock);
+
+void profiler_shutdown() {
+  LOG("profiler_shutdown");
+
+  VTUNE_SHUTDOWN();
+
+  MOZ_RELEASE_ASSERT(profiler_is_main_thread());
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  // If the profiler is active we must get a handle to the SamplerThread before
+  // ActivePS is destroyed, in order to delete it.
+  SamplerThread* samplerThread = nullptr;
+  {
+    PSAutoLock lock;
+
+    // Save the profile on shutdown if requested.
+    if (ActivePS::Exists(lock)) {
+      const char* filename = getenv("MOZ_PROFILER_SHUTDOWN");
+      if (filename && filename[0] != '\0') {
+        locked_profiler_save_profile_to_file(lock, filename,
+                                             /* aIsShuttingDown */ true);
+      }
+
+      samplerThread = locked_profiler_stop(lock);
+    }
+
+    CorePS::Destroy(lock);
+
+    // We just destroyed CorePS and the ThreadInfos it contains, so we can
+    // clear this thread's TLSRegisteredThread.
+    TLSRegisteredThread::SetRegisteredThread(lock, nullptr);
+  }
+
+  // We do these operations with gPSMutex unlocked. The comments in
+  // profiler_stop() explain why.
+  if (samplerThread) {
+    delete samplerThread;
+  }
+}
+
+static bool WriteProfileToJSONWriter(SpliceableChunkedJSONWriter& aWriter,
+                                     double aSinceTime, bool aIsShuttingDown,
+                                     bool aOnlyThreads = false) {
+  LOG("WriteProfileToJSONWriter");
+
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  if (!aOnlyThreads) {
+    aWriter.Start();
+    {
+      if (!profiler_stream_json_for_this_process(
+              aWriter, aSinceTime, aIsShuttingDown, aOnlyThreads)) {
+        return false;
+      }
+
+      // Don't include profiles from other processes because this is a
+      // synchronous function.
+      aWriter.StartArrayProperty("processes");
+      aWriter.EndArray();
+    }
+    aWriter.End();
+  } else {
+    aWriter.StartBareList();
+    if (!profiler_stream_json_for_this_process(aWriter, aSinceTime,
+                                               aIsShuttingDown, aOnlyThreads)) {
+      return false;
+    }
+    aWriter.EndBareList();
+  }
+  return true;
+}
+
+void profiler_set_process_name(const std::string& aProcessName,
+                               const std::string* aETLDplus1) {
+  LOG("profiler_set_process_name(\"%s\", \"%s\")", aProcessName.c_str(),
+      aETLDplus1 ? aETLDplus1->c_str() : "<none>");
+  PSAutoLock lock;
+  CorePS::SetProcessName(lock, aProcessName);
+  if (aETLDplus1) {
+    CorePS::SetETLDplus1(lock, *aETLDplus1);
+  }
+}
+
+UniquePtr<char[]> profiler_get_profile(double aSinceTime, bool aIsShuttingDown,
+                                       bool aOnlyThreads) {
+  LOG("profiler_get_profile");
+
+  SpliceableChunkedJSONWriter b{FailureLatchInfallibleSource::Singleton()};
+  if (!WriteProfileToJSONWriter(b, aSinceTime, aIsShuttingDown, aOnlyThreads)) {
+    return nullptr;
+  }
+  return b.ChunkedWriteFunc().CopyData();
+}
+
+void profiler_get_start_params(int* aCapacity, Maybe<double>* aDuration,
+                               double* aInterval, uint32_t* aFeatures,
+                               Vector<const char*>* aFilters) {
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  if (!aCapacity || !aDuration || !aInterval || !aFeatures || !aFilters) {
+    return;
+  }
+
+  PSAutoLock lock;
+
+  if (!ActivePS::Exists(lock)) {
+    *aCapacity = 0;
+    *aDuration = Nothing();
+    *aInterval = 0;
+    *aFeatures = 0;
+    aFilters->clear();
+    return;
+  }
+
+  *aCapacity = ActivePS::Capacity(lock).Value();
+  *aDuration = ActivePS::Duration(lock);
+  *aInterval = ActivePS::Interval(lock);
+  *aFeatures = ActivePS::Features(lock);
+
+  const Vector<std::string>& filters = ActivePS::Filters(lock);
+  MOZ_ALWAYS_TRUE(aFilters->resize(filters.length()));
+  for (uint32_t i = 0; i < filters.length(); ++i) {
+    (*aFilters)[i] = filters[i].c_str();
+  }
+}
+
+void GetProfilerEnvVarsForChildProcess(
+    std::function<void(const char* key, const char* value)>&& aSetEnv) {
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  PSAutoLock lock;
+
+  if (!ActivePS::Exists(lock)) {
+    aSetEnv("MOZ_PROFILER_STARTUP", "");
+    return;
+  }
+
+  aSetEnv("MOZ_PROFILER_STARTUP", "1");
+  auto capacityString =
+      Smprintf("%u", unsigned(ActivePS::Capacity(lock).Value()));
+  aSetEnv("MOZ_PROFILER_STARTUP_ENTRIES", capacityString.get());
+
+  // Use AppendFloat instead of Smprintf with %f because the decimal
+  // separator used by %f is locale-dependent. But the string we produce needs
+  // to be parseable by strtod, which only accepts the period character as a
+  // decimal separator. AppendFloat always uses the period character.
+  std::string intervalString = std::to_string(ActivePS::Interval(lock));
+  aSetEnv("MOZ_PROFILER_STARTUP_INTERVAL", intervalString.c_str());
+
+  auto featuresString = Smprintf("%d", ActivePS::Features(lock));
+  aSetEnv("MOZ_PROFILER_STARTUP_FEATURES_BITFIELD", featuresString.get());
+
+  std::string filtersString;
+  const Vector<std::string>& filters = ActivePS::Filters(lock);
+  for (uint32_t i = 0; i < filters.length(); ++i) {
+    filtersString += filters[i];
+    if (i != filters.length() - 1) {
+      filtersString += ",";
+    }
+  }
+  aSetEnv("MOZ_PROFILER_STARTUP_FILTERS", filtersString.c_str());
+}
+
+void profiler_received_exit_profile(const std::string& aExitProfile) {
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+  PSAutoLock lock;
+  if (!ActivePS::Exists(lock)) {
+    return;
+  }
+  ActivePS::AddExitProfile(lock, aExitProfile);
+}
+
+Vector<std::string> profiler_move_exit_profiles() {
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+  PSAutoLock lock;
+  Vector<std::string> profiles;
+  if (ActivePS::Exists(lock)) {
+    profiles = ActivePS::MoveExitProfiles(lock);
+  }
+  return profiles;
+}
+
+static void locked_profiler_save_profile_to_file(PSLockRef aLock,
+                                                 const char* aFilename,
+                                                 bool aIsShuttingDown = false) {
+  LOG("locked_profiler_save_profile_to_file(%s)", aFilename);
+
+  MOZ_RELEASE_ASSERT(CorePS::Exists() && ActivePS::Exists(aLock));
+
+  std::ofstream stream;
+  stream.open(aFilename);
+  if (stream.is_open()) {
+    OStreamJSONWriteFunc jw(stream);
+    SpliceableJSONWriter w(jw, FailureLatchInfallibleSource::Singleton());
+    w.Start();
+    {
+      locked_profiler_stream_json_for_this_process(aLock, w, /* sinceTime */ 0,
+                                                   aIsShuttingDown);
+
+      w.StartArrayProperty("processes");
+      Vector<std::string> exitProfiles = ActivePS::MoveExitProfiles(aLock);
+      for (auto& exitProfile : exitProfiles) {
+        if (!exitProfile.empty()) {
+          w.Splice(exitProfile);
+        }
+      }
+      w.EndArray();
+    }
+    w.End();
+
+    stream.close();
+  }
+}
+
+void baseprofiler_save_profile_to_file(const char* aFilename) {
+  LOG("baseprofiler_save_profile_to_file(%s)", aFilename);
+
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  PSAutoLock lock;
+
+  if (!ActivePS::Exists(lock)) {
+    return;
+  }
+
+  locked_profiler_save_profile_to_file(lock, aFilename);
+}
+
+uint32_t profiler_get_available_features() {
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+  return AvailableFeatures();
+}
+
+Maybe<ProfilerBufferInfo> profiler_get_buffer_info() {
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  PSAutoLock lock;
+
+  if (!ActivePS::Exists(lock)) {
+    return Nothing();
+  }
+
+  return Some(ActivePS::Buffer(lock).GetProfilerBufferInfo());
+}
+
+// This basically duplicates AutoProfilerLabel's constructor.
+static void* MozGlueBaseLabelEnter(const char* aLabel,
+                                   const char* aDynamicString, void* aSp) {
+  ProfilingStack* profilingStack = AutoProfilerLabel::sProfilingStack.get();
+  if (profilingStack) {
+    profilingStack->pushLabelFrame(aLabel, aDynamicString, aSp,
+                                   ProfilingCategoryPair::OTHER);
+  }
+  return profilingStack;
+}
+
+// This basically duplicates AutoProfilerLabel's destructor.
+static void MozGlueBaseLabelExit(void* sProfilingStack) {
+  if (sProfilingStack) {
+    reinterpret_cast<ProfilingStack*>(sProfilingStack)->pop();
+  }
+}
+
+static void locked_profiler_start(PSLockRef aLock, PowerOfTwo32 aCapacity,
+                                  double aInterval, uint32_t aFeatures,
+                                  const char** aFilters, uint32_t aFilterCount,
+                                  const Maybe<double>& aDuration) {
+  const TimeStamp profilingStartTime = TimeStamp::Now();
+
+  if (LOG_TEST) {
+    LOG("locked_profiler_start");
+    LOG("- capacity  = %d", int(aCapacity.Value()));
+    LOG("- duration  = %.2f", aDuration ? *aDuration : -1);
+    LOG("- interval = %.2f", aInterval);
+
+#define LOG_FEATURE(n_, str_, Name_, desc_)     \
+  if (ProfilerFeature::Has##Name_(aFeatures)) { \
+    LOG("- feature  = %s", str_);               \
+  }
+
+    BASE_PROFILER_FOR_EACH_FEATURE(LOG_FEATURE)
+
+#undef LOG_FEATURE
+
+    for (uint32_t i = 0; i < aFilterCount; i++) {
+      LOG("- threads  = %s", aFilters[i]);
+    }
+  }
+
+  MOZ_RELEASE_ASSERT(CorePS::Exists() && !ActivePS::Exists(aLock));
+
+  mozilla::base_profiler_markers_detail::EnsureBufferForMainThreadAddMarker();
+
+#if defined(GP_PLAT_amd64_windows) || defined(GP_PLAT_arm64_windows)
+  mozilla::WindowsStackWalkInitialization();
+#endif
+
+  // Fall back to the default values if the passed-in values are unreasonable.
+  // We want to be able to store at least one full stack.
+  // TODO: Review magic numbers.
+  PowerOfTwo32 capacity =
+      (aCapacity.Value() >=
+       ProfileBufferChunkManager::scExpectedMaximumStackSize / scBytesPerEntry)
+          ? aCapacity
+          : BASE_PROFILER_DEFAULT_ENTRIES;
+  Maybe<double> duration = aDuration;
+
+  if (aDuration && *aDuration <= 0) {
+    duration = Nothing();
+  }
+  double interval = aInterval > 0 ? aInterval : BASE_PROFILER_DEFAULT_INTERVAL;
+
+  ActivePS::Create(aLock, profilingStartTime, capacity, interval, aFeatures,
+                   aFilters, aFilterCount, duration);
+
+  // Set up profiling for each registered thread, if appropriate.
+  const Vector<UniquePtr<RegisteredThread>>& registeredThreads =
+      CorePS::RegisteredThreads(aLock);
+  for (auto& registeredThread : registeredThreads) {
+    RefPtr<ThreadInfo> info = registeredThread->Info();
+
+    if (ActivePS::ShouldProfileThread(aLock, info)) {
+      registeredThread->RacyRegisteredThread().SetIsBeingProfiled(true);
+      ActivePS::AddLiveProfiledThread(aLock, registeredThread.get(),
+                                      MakeUnique<ProfiledThreadData>(info));
+      registeredThread->RacyRegisteredThread().ReinitializeOnResume();
+    }
+  }
+
+  // Setup support for pushing/popping labels in mozglue.
+  RegisterProfilerLabelEnterExit(MozGlueBaseLabelEnter, MozGlueBaseLabelExit);
+
+  // At the very end, set up RacyFeatures.
+  RacyFeatures::SetActive(ActivePS::Features(aLock));
+}
+
+void profiler_start(PowerOfTwo32 aCapacity, double aInterval,
+                    uint32_t aFeatures, const char** aFilters,
+                    uint32_t aFilterCount, const Maybe<double>& aDuration) {
+  LOG("profiler_start");
+
+  SamplerThread* samplerThread = nullptr;
+  {
+    PSAutoLock lock;
+
+    // Initialize if necessary.
+    if (!CorePS::Exists()) {
+      profiler_init(nullptr);
+    }
+
+    // Reset the current state if the profiler is running.
+    if (ActivePS::Exists(lock)) {
+      samplerThread = locked_profiler_stop(lock);
+    }
+
+    locked_profiler_start(lock, aCapacity, aInterval, aFeatures, aFilters,
+                          aFilterCount, aDuration);
+  }
+
+  // TODO: Install memory counter if it is possible from mozglue.
+  // #if defined(MOZ_REPLACE_MALLOC) && defined(MOZ_PROFILER_MEMORY)
+  //   // start counting memory allocations (outside of lock because this may
+  //   call
+  //   // profiler_add_sampled_counter which would attempt to take the lock.)
+  //   mozilla::profiler::install_memory_counter(true);
+  // #endif
+
+  // We do these operations with gPSMutex unlocked. The comments in
+  // profiler_stop() explain why.
+  if (samplerThread) {
+    delete samplerThread;
+  }
+}
+
+void profiler_ensure_started(PowerOfTwo32 aCapacity, double aInterval,
+                             uint32_t aFeatures, const char** aFilters,
+                             uint32_t aFilterCount,
+                             const Maybe<double>& aDuration) {
+  LOG("profiler_ensure_started");
+
+  // bool startedProfiler = false; (See TODO below)
+  SamplerThread* samplerThread = nullptr;
+  {
+    PSAutoLock lock;
+
+    // Initialize if necessary.
+    if (!CorePS::Exists()) {
+      profiler_init(nullptr);
+    }
+
+    if (ActivePS::Exists(lock)) {
+      // The profiler is active.
+      if (!ActivePS::Equals(lock, aCapacity, aDuration, aInterval, aFeatures,
+                            aFilters, aFilterCount)) {
+        // Stop and restart with different settings.
+        samplerThread = locked_profiler_stop(lock);
+        locked_profiler_start(lock, aCapacity, aInterval, aFeatures, aFilters,
+                              aFilterCount, aDuration);
+        // startedProfiler = true; (See TODO below)
+      }
+    } else {
+      // The profiler is stopped.
+      locked_profiler_start(lock, aCapacity, aInterval, aFeatures, aFilters,
+                            aFilterCount, aDuration);
+      // startedProfiler = true; (See TODO below)
+    }
+  }
+
+  // TODO: Install memory counter if it is possible from mozglue.
+  // #if defined(MOZ_REPLACE_MALLOC) && defined(MOZ_PROFILER_MEMORY)
+  //   // start counting memory allocations (outside of lock because this may
+  //   // call profiler_add_sampled_counter which would attempt to take the
+  //   // lock.)
+  //   mozilla::profiler::install_memory_counter(true);
+  // #endif
+
+  // We do these operations with gPSMutex unlocked. The comments in
+  // profiler_stop() explain why.
+  if (samplerThread) {
+    delete samplerThread;
+  }
+}
+
+[[nodiscard]] static SamplerThread* locked_profiler_stop(PSLockRef aLock) {
+  LOG("locked_profiler_stop");
+
+  MOZ_RELEASE_ASSERT(CorePS::Exists() && ActivePS::Exists(aLock));
+
+  // At the very start, clear RacyFeatures.
+  RacyFeatures::SetInactive();
+
+  // TODO: Uninstall memory counter if it is possible from mozglue.
+  // #if defined(MOZ_REPLACE_MALLOC) && defined(MOZ_PROFILER_MEMORY)
+  //   mozilla::profiler::install_memory_counter(false);
+  // #endif
+
+  // Remove support for pushing/popping labels in mozglue.
+  RegisterProfilerLabelEnterExit(nullptr, nullptr);
+
+  // Stop sampling live threads.
+  const Vector<LiveProfiledThreadData>& liveProfiledThreads =
+      ActivePS::LiveProfiledThreads(aLock);
+  for (auto& thread : liveProfiledThreads) {
+    RegisteredThread* registeredThread = thread.mRegisteredThread;
+    registeredThread->RacyRegisteredThread().SetIsBeingProfiled(false);
+  }
+
+  // The Stop() call doesn't actually stop Run(); that happens in this
+  // function's caller when the sampler thread is destroyed. Stop() just gives
+  // the SamplerThread a chance to do some cleanup with gPSMutex locked.
+  SamplerThread* samplerThread = ActivePS::Destroy(aLock);
+  samplerThread->Stop(aLock);
+
+  mozilla::base_profiler_markers_detail::ReleaseBufferForMainThreadAddMarker();
+
+  return samplerThread;
+}
+
+void profiler_stop() {
+  LOG("profiler_stop");
+
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  SamplerThread* samplerThread;
+  {
+    PSAutoLock lock;
+
+    if (!ActivePS::Exists(lock)) {
+      return;
+    }
+
+    samplerThread = locked_profiler_stop(lock);
+  }
+
+  // We delete with gPSMutex unlocked. Otherwise we would get a deadlock: we
+  // would be waiting here with gPSMutex locked for SamplerThread::Run() to
+  // return so the join operation within the destructor can complete, but Run()
+  // needs to lock gPSMutex to return.
+  //
+  // Because this call occurs with gPSMutex unlocked, it -- including the final
+  // iteration of Run()'s loop -- must be able detect deactivation and return
+  // in a way that's safe with respect to other gPSMutex-locking operations
+  // that may have occurred in the meantime.
+  delete samplerThread;
+}
+
+bool profiler_is_paused() {
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  PSAutoLock lock;
+
+  if (!ActivePS::Exists(lock)) {
+    return false;
+  }
+
+  return ActivePS::IsPaused(lock);
+}
+
+void profiler_pause() {
+  LOG("profiler_pause");
+
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  {
+    PSAutoLock lock;
+
+    if (!ActivePS::Exists(lock)) {
+      return;
+    }
+
+    RacyFeatures::SetPaused();
+    ActivePS::SetIsPaused(lock, true);
+    ActivePS::Buffer(lock).AddEntry(ProfileBufferEntry::Pause(profiler_time()));
+  }
+}
+
+void profiler_resume() {
+  LOG("profiler_resume");
+
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  {
+    PSAutoLock lock;
+
+    if (!ActivePS::Exists(lock)) {
+      return;
+    }
+
+    ActivePS::Buffer(lock).AddEntry(
+        ProfileBufferEntry::Resume(profiler_time()));
+    ActivePS::SetIsPaused(lock, false);
+    RacyFeatures::SetUnpaused();
+  }
+}
+
+bool profiler_is_sampling_paused() {
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  PSAutoLock lock;
+
+  if (!ActivePS::Exists(lock)) {
+    return false;
+  }
+
+  return ActivePS::IsSamplingPaused(lock);
+}
+
+void profiler_pause_sampling() {
+  LOG("profiler_pause_sampling");
+
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  {
+    PSAutoLock lock;
+
+    if (!ActivePS::Exists(lock)) {
+      return;
+    }
+
+    RacyFeatures::SetSamplingPaused();
+    ActivePS::SetIsSamplingPaused(lock, true);
+    ActivePS::Buffer(lock).AddEntry(
+        ProfileBufferEntry::PauseSampling(profiler_time()));
+  }
+}
+
+void profiler_resume_sampling() {
+  LOG("profiler_resume_sampling");
+
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  {
+    PSAutoLock lock;
+
+    if (!ActivePS::Exists(lock)) {
+      return;
+    }
+
+    ActivePS::Buffer(lock).AddEntry(
+        ProfileBufferEntry::ResumeSampling(profiler_time()));
+    ActivePS::SetIsSamplingPaused(lock, false);
+    RacyFeatures::SetSamplingUnpaused();
+  }
+}
+
+bool profiler_feature_active(uint32_t aFeature) {
+  // This function runs both on and off the main thread.
+
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  // This function is hot enough that we use RacyFeatures, not ActivePS.
+  return RacyFeatures::IsActiveWithFeature(aFeature);
+}
+
+bool profiler_active_without_feature(uint32_t aFeature) {
+  // This function runs both on and off the main thread.
+
+  // This function is hot enough that we use RacyFeatures, not ActivePS.
+  return RacyFeatures::IsActiveWithoutFeature(aFeature);
+}
+
+void profiler_add_sampled_counter(BaseProfilerCount* aCounter) {
+  DEBUG_LOG("profiler_add_sampled_counter(%s)", aCounter->mLabel);
+  PSAutoLock lock;
+  CorePS::AppendCounter(lock, aCounter);
+}
+
+void profiler_remove_sampled_counter(BaseProfilerCount* aCounter) {
+  DEBUG_LOG("profiler_remove_sampled_counter(%s)", aCounter->mLabel);
+  PSAutoLock lock;
+  // Note: we don't enforce a final sample, though we could do so if the
+  // profiler was active
+  CorePS::RemoveCounter(lock, aCounter);
+}
+
+ProfilingStack* profiler_register_thread(const char* aName,
+                                         void* aGuessStackTop) {
+  DEBUG_LOG("profiler_register_thread(%s)", aName);
+
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  PSAutoLock lock;
+
+  if (RegisteredThread* thread = FindCurrentThreadRegisteredThread(lock);
+      thread) {
+    LOG("profiler_register_thread(%s) - thread %" PRIu64
+        " already registered as %s",
+        aName, uint64_t(profiler_current_thread_id().ToNumber()),
+        thread->Info()->Name());
+    // TODO: Use new name. This is currently not possible because the
+    // RegisteredThread's ThreadInfo cannot be changed.
+    // In the meantime, we record a marker that could be used in the frontend.
+    std::string text("Thread ");
+    text += std::to_string(profiler_current_thread_id().ToNumber());
+    text += " \"";
+    text += thread->Info()->Name();
+    text += "\" attempted to re-register as \"";
+    text += aName;
+    text += "\"";
+    BASE_PROFILER_MARKER_TEXT("profiler_register_thread again", OTHER_Profiling,
+                              MarkerThreadId::MainThread(), text);
+
+    return &thread->RacyRegisteredThread().ProfilingStack();
+  }
+
+  void* stackTop = GetStackTop(aGuessStackTop);
+  return locked_register_thread(lock, aName, stackTop);
+}
+
+void profiler_unregister_thread() {
+  if (!CorePS::Exists()) {
+    // This function can be called after the main thread has already shut down.
+    return;
+  }
+
+  PSAutoLock lock;
+
+  RegisteredThread* registeredThread = FindCurrentThreadRegisteredThread(lock);
+  MOZ_RELEASE_ASSERT(registeredThread ==
+                     TLSRegisteredThread::RegisteredThread(lock));
+  if (registeredThread) {
+    RefPtr<ThreadInfo> info = registeredThread->Info();
+
+    DEBUG_LOG("profiler_unregister_thread: %s", info->Name());
+
+    if (ActivePS::Exists(lock)) {
+      ActivePS::UnregisterThread(lock, registeredThread);
+    }
+
+    // Clear the pointer to the RegisteredThread object that we're about to
+    // destroy.
+    TLSRegisteredThread::SetRegisteredThread(lock, nullptr);
+
+    // Remove the thread from the list of registered threads. This deletes the
+    // registeredThread object.
+    CorePS::RemoveRegisteredThread(lock, registeredThread);
+  } else {
+    LOG("profiler_unregister_thread() - thread %" PRIu64
+        " already unregistered",
+        uint64_t(profiler_current_thread_id().ToNumber()));
+    // We cannot record a marker on this thread because it was already
+    // unregistered. Send it to the main thread (unless this *is* already the
+    // main thread, which has been unregistered); this may be useful to catch
+    // mismatched register/unregister pairs in Firefox.
+    if (BaseProfilerThreadId tid = profiler_current_thread_id();
+        tid != profiler_main_thread_id()) {
+      BASE_PROFILER_MARKER_TEXT(
+          "profiler_unregister_thread again", OTHER_Profiling,
+          MarkerThreadId::MainThread(),
+          std::to_string(profiler_current_thread_id().ToNumber()));
+    }
+    // There are two ways FindCurrentThreadRegisteredThread() might have failed.
+    //
+    // - TLSRegisteredThread::Init() failed in locked_register_thread().
+    //
+    // - We've already called profiler_unregister_thread() for this thread.
+    //   (Whether or not it should, this does happen in practice.)
+    //
+    // Either way, TLSRegisteredThread should be empty.
+    MOZ_RELEASE_ASSERT(!TLSRegisteredThread::RegisteredThread(lock));
+  }
+}
+
+void profiler_register_page(uint64_t aTabID, uint64_t aInnerWindowID,
+                            const std::string& aUrl,
+                            uint64_t aEmbedderInnerWindowID) {
+  DEBUG_LOG("profiler_register_page(%" PRIu64 ", %" PRIu64 ", %s, %" PRIu64 ")",
+            aTabID, aInnerWindowID, aUrl.c_str(), aEmbedderInnerWindowID);
+
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  PSAutoLock lock;
+
+  // When a Browsing context is first loaded, the first url loaded in it will be
+  // about:blank. Because of that, this call keeps the first non-about:blank
+  // registration of window and discards the previous one.
+  RefPtr<PageInformation> pageInfo =
+      new PageInformation(aTabID, aInnerWindowID, aUrl, aEmbedderInnerWindowID);
+  CorePS::AppendRegisteredPage(lock, std::move(pageInfo));
+
+  // After appending the given page to CorePS, look for the expired
+  // pages and remove them if there are any.
+  if (ActivePS::Exists(lock)) {
+    ActivePS::DiscardExpiredPages(lock);
+  }
+}
+
+void profiler_unregister_page(uint64_t aRegisteredInnerWindowID) {
+  if (!CorePS::Exists()) {
+    // This function can be called after the main thread has already shut down.
+    return;
+  }
+
+  PSAutoLock lock;
+
+  // During unregistration, if the profiler is active, we have to keep the
+  // page information since there may be some markers associated with the given
+  // page. But if profiler is not active. we have no reason to keep the
+  // page information here because there can't be any marker associated with it.
+  if (ActivePS::Exists(lock)) {
+    ActivePS::UnregisterPage(lock, aRegisteredInnerWindowID);
+  } else {
+    CorePS::RemoveRegisteredPage(lock, aRegisteredInnerWindowID);
+  }
+}
+
+void profiler_clear_all_pages() {
+  if (!CorePS::Exists()) {
+    // This function can be called after the main thread has already shut down.
+    return;
+  }
+
+  {
+    PSAutoLock lock;
+    CorePS::ClearRegisteredPages(lock);
+    if (ActivePS::Exists(lock)) {
+      ActivePS::ClearUnregisteredPages(lock);
+    }
+  }
+}
+
+void profiler_thread_sleep() {
+  // This function runs both on and off the main thread.
+
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  RacyRegisteredThread* racyRegisteredThread =
+      TLSRegisteredThread::RacyRegisteredThread();
+  if (!racyRegisteredThread) {
+    return;
+  }
+
+  racyRegisteredThread->SetSleeping();
+}
+
+void profiler_thread_wake() {
+  // This function runs both on and off the main thread.
+
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  RacyRegisteredThread* racyRegisteredThread =
+      TLSRegisteredThread::RacyRegisteredThread();
+  if (!racyRegisteredThread) {
+    return;
+  }
+
+  racyRegisteredThread->SetAwake();
+}
+
+bool detail::IsThreadBeingProfiled() {
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  const RacyRegisteredThread* racyRegisteredThread =
+      TLSRegisteredThread::RacyRegisteredThread();
+  return racyRegisteredThread && racyRegisteredThread->IsBeingProfiled();
+}
+
+bool profiler_thread_is_sleeping() {
+  MOZ_RELEASE_ASSERT(profiler_is_main_thread());
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  RacyRegisteredThread* racyRegisteredThread =
+      TLSRegisteredThread::RacyRegisteredThread();
+  if (!racyRegisteredThread) {
+    return false;
+  }
+  return racyRegisteredThread->IsSleeping();
+}
+
+double profiler_time() {
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  TimeDuration delta = TimeStamp::Now() - CorePS::ProcessStartTime();
+  return delta.ToMilliseconds();
+}
+
+bool profiler_capture_backtrace_into(ProfileChunkedBuffer& aChunkedBuffer,
+                                     StackCaptureOptions aCaptureOptions) {
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+
+  PSAutoLock lock;
+
+  if (!ActivePS::Exists(lock) ||
+      aCaptureOptions == StackCaptureOptions::NoStack) {
+    return false;
+  }
+
+  RegisteredThread* registeredThread =
+      TLSRegisteredThread::RegisteredThread(lock);
+  if (!registeredThread) {
+    MOZ_ASSERT(registeredThread);
+    return false;
+  }
+
+  ProfileBuffer profileBuffer(aChunkedBuffer);
+
+  Registers regs;
+#if defined(HAVE_NATIVE_UNWIND)
+  REGISTERS_SYNC_POPULATE(regs);
+#else
+  regs.Clear();
+#endif
+
+  DoSyncSample(lock, *registeredThread, TimeStamp::Now(), regs, profileBuffer,
+               aCaptureOptions);
+
+  return true;
+}
+
+UniquePtr<ProfileChunkedBuffer> profiler_capture_backtrace() {
+  MOZ_RELEASE_ASSERT(CorePS::Exists());
+  AUTO_BASE_PROFILER_LABEL("baseprofiler::profiler_capture_backtrace",
+                           PROFILER);
+
+  // Quick is-active check before allocating a buffer.
+  // If NoMarkerStacks is set, we don't want to capture a backtrace.
+  if (!profiler_active_without_feature(ProfilerFeature::NoMarkerStacks)) {
+    return nullptr;
+  }
+
+  auto buffer = MakeUnique<ProfileChunkedBuffer>(
+      ProfileChunkedBuffer::ThreadSafety::WithoutMutex,
+      MakeUnique<ProfileBufferChunkManagerSingle>(
+          ProfileBufferChunkManager::scExpectedMaximumStackSize));
+
+  if (!profiler_capture_backtrace_into(*buffer, StackCaptureOptions::Full)) {
+    return nullptr;
+  }
+
+  return buffer;
+}
+
+UniqueProfilerBacktrace profiler_get_backtrace() {
+  UniquePtr<ProfileChunkedBuffer> buffer = profiler_capture_backtrace();
+
+  if (!buffer) {
+    return nullptr;
+  }
+
+  return UniqueProfilerBacktrace(
+      new ProfilerBacktrace("SyncProfile", std::move(buffer)));
+}
+
+void ProfilerBacktraceDestructor::operator()(ProfilerBacktrace* aBacktrace) {
+  delete aBacktrace;
+}
+
+bool profiler_is_locked_on_current_thread() {
+  // This function is used to help users avoid calling `profiler_...` functions
+  // when the profiler may already have a lock in place, which would prevent a
+  // 2nd recursive lock (resulting in a crash or a never-ending wait).
+  // So we must return `true` for any of:
+  // - The main profiler mutex, used by most functions, and/or
+  // - The buffer mutex, used directly in some functions without locking the
+  //   main mutex, e.g., marker-related functions.
+  return PSAutoLock::IsLockedOnCurrentThread() ||
+         profiler_get_core_buffer().IsThreadSafeAndLockedOnCurrentThread();
+}
+
+// This is a simplified version of profiler_add_marker that can be easily passed
+// into the JS engine.
+void profiler_add_js_marker(const char* aMarkerName, const char* aMarkerText) {
+  BASE_PROFILER_MARKER_TEXT(
+      ProfilerString8View::WrapNullTerminatedString(aMarkerName), JS, {},
+      ProfilerString8View::WrapNullTerminatedString(aMarkerText));
+}
+
+// NOTE: aCollector's methods will be called while the target thread is paused.
+// Doing things in those methods like allocating -- which may try to claim
+// locks -- is a surefire way to deadlock.
+void profiler_suspend_and_sample_thread(BaseProfilerThreadId aThreadId,
+                                        uint32_t aFeatures,
+                                        ProfilerStackCollector& aCollector,
+                                        bool aSampleNative /* = true */) {
+  const bool isSynchronous = [&aThreadId]() {
+    const BaseProfilerThreadId currentThreadId = profiler_current_thread_id();
+    if (!aThreadId.IsSpecified()) {
+      aThreadId = currentThreadId;
+      return true;
+    }
+    return aThreadId == currentThreadId;
+  }();
+
+  // Lock the profiler mutex
+  PSAutoLock lock;
+
+  const Vector<UniquePtr<RegisteredThread>>& registeredThreads =
+      CorePS::RegisteredThreads(lock);
+  for (auto& thread : registeredThreads) {
+    RefPtr<ThreadInfo> info = thread->Info();
+    RegisteredThread& registeredThread = *thread.get();
+
+    if (info->ThreadId() == aThreadId) {
+      if (info->IsMainThread()) {
+        aCollector.SetIsMainThread();
+      }
+
+      // Allocate the space for the native stack
+      NativeStack nativeStack;
+
+      auto collectStack = [&](const Registers& aRegs, const TimeStamp& aNow) {
+      // The target thread is now suspended. Collect a native
+      // backtrace, and call the callback.
+#if defined(HAVE_FASTINIT_NATIVE_UNWIND)
+        if (aSampleNative) {
+          // We can only use FramePointerStackWalk or MozStackWalk from
+          // suspend_and_sample_thread as other stackwalking methods may not be
+          // initialized.
+#  if defined(USE_FRAME_POINTER_STACK_WALK)
+          DoFramePointerBacktrace(lock, registeredThread, aRegs, nativeStack);
+#  elif defined(USE_MOZ_STACK_WALK)
+          DoMozStackWalkBacktrace(lock, registeredThread, aRegs, nativeStack);
+#  else
+#    error "Invalid configuration"
+#  endif
+
+          MergeStacks(aFeatures, isSynchronous, registeredThread, aRegs,
+                      nativeStack, aCollector);
+        } else
+#endif
+        {
+          MergeStacks(aFeatures, isSynchronous, registeredThread, aRegs,
+                      nativeStack, aCollector);
+
+          aCollector.CollectNativeLeafAddr((void*)aRegs.mPC);
+        }
+      };
+
+      if (isSynchronous) {
+        // Sampling the current thread, do NOT suspend it!
+        Registers regs;
+#if defined(HAVE_NATIVE_UNWIND)
+        REGISTERS_SYNC_POPULATE(regs);
+#else
+        regs.Clear();
+#endif
+        collectStack(regs, TimeStamp::Now());
+      } else {
+        // Suspend, sample, and then resume the target thread.
+        Sampler sampler(lock);
+        TimeStamp now = TimeStamp::Now();
+        sampler.SuspendAndSampleAndResumeThread(lock, registeredThread, now,
+                                                collectStack);
+
+        // NOTE: Make sure to disable the sampler before it is destroyed, in
+        // case the profiler is running at the same time.
+        sampler.Disable(lock);
+      }
+      break;
+    }
+  }
+}
+
+// END externally visible functions
+////////////////////////////////////////////////////////////////////////
+
+}  // namespace baseprofiler
+}  // namespace mozilla
diff --git a/mozglue/baseprofiler/core/platform.h b/mozglue/baseprofiler/core/platform.h
new file mode 100644
index 0000000000..f77fc12726
--- /dev/null
+++ b/mozglue/baseprofiler/core/platform.h
@@ -0,0 +1,149 @@
+// Copyright (c) 2006-2011 The Chromium Authors. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//  * Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//  * Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in
+//    the documentation and/or other materials provided with the
+//    distribution.
+//  * Neither the name of Google, Inc. nor the names of its contributors
+//    may be used to endorse or promote products derived from this
+//    software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+
+#ifndef TOOLS_PLATFORM_H_
+#define TOOLS_PLATFORM_H_
+
+#include "PlatformMacros.h"
+
+#include "BaseProfiler.h"
+
+#include "mozilla/Atomics.h"
+#include "mozilla/Logging.h"
+#include "mozilla/UniquePtr.h"
+#include "mozilla/Vector.h"
+
+#include <functional>
+#include <stdint.h>
+#include <string>
+
+namespace mozilla {
+namespace baseprofiler {
+bool LogTest(int aLevelToTest);
+void PrintToConsole(const char* aFmt, ...) MOZ_FORMAT_PRINTF(1, 2);
+}  // namespace baseprofiler
+}  // namespace mozilla
+
+// These are for MOZ_BASE_PROFILER_LOGGING and above. It's the default logging
+// level for the profiler, and should be used sparingly.
+#define LOG_TEST ::mozilla::baseprofiler::LogTest(3)
+#define LOG(arg, ...)                                                \
+  do {                                                               \
+    if (LOG_TEST) {                                                  \
+      ::mozilla::baseprofiler::PrintToConsole(                       \
+          "[I %d/%d] " arg "\n",                                     \
+          int(::mozilla::baseprofiler::profiler_current_process_id() \
+                  .ToNumber()),                                      \
+          int(::mozilla::baseprofiler::profiler_current_thread_id()  \
+                  .ToNumber()),                                      \
+          ##__VA_ARGS__);                                            \
+    }                                                                \
+  } while (0)
+
+// These are for MOZ_BASE_PROFILER_DEBUG_LOGGING. It should be used for logging
+// that is somewhat more verbose than LOG.
+#define DEBUG_LOG_TEST ::mozilla::baseprofiler::LogTest(4)
+#define DEBUG_LOG(arg, ...)                                          \
+  do {                                                               \
+    if (DEBUG_LOG_TEST) {                                            \
+      ::mozilla::baseprofiler::PrintToConsole(                       \
+          "[D %d/%d] " arg "\n",                                     \
+          int(::mozilla::baseprofiler::profiler_current_process_id() \
+                  .ToNumber()),                                      \
+          int(::mozilla::baseprofiler::profiler_current_thread_id()  \
+                  .ToNumber()),                                      \
+          ##__VA_ARGS__);                                            \
+    }                                                                \
+  } while (0)
+
+// These are for MOZ_BASE_PROFILER_VERBOSE_LOGGING. It should be used for
+// logging that is somewhat more verbose than DEBUG_LOG.
+#define VERBOSE_LOG_TEST ::mozilla::baseprofiler::LogTest(5)
+#define VERBOSE_LOG(arg, ...)                                        \
+  do {                                                               \
+    if (VERBOSE_LOG_TEST) {                                          \
+      ::mozilla::baseprofiler::PrintToConsole(                       \
+          "[V %d/%d] " arg "\n",                                     \
+          int(::mozilla::baseprofiler::profiler_current_process_id() \
+                  .ToNumber()),                                      \
+          int(::mozilla::baseprofiler::profiler_current_thread_id()  \
+                  .ToNumber()),                                      \
+          ##__VA_ARGS__);                                            \
+    }                                                                \
+  } while (0)
+
+namespace mozilla {
+
+class JSONWriter;
+
+namespace baseprofiler {
+
+// If positive, skip stack-sampling in the sampler thread loop.
+// Users should increment it atomically when samplings should be avoided, and
+// later decrement it back. Multiple uses can overlap.
+// There could be a sampling in progress when this is first incremented, so if
+// it is critical to prevent any sampling, lock the profiler mutex instead.
+// Relaxed ordering, because it's used to request that the profiler pause
+// future sampling; this is not time critical, nor dependent on anything else.
+extern mozilla::Atomic<int, mozilla::MemoryOrdering::Relaxed> gSkipSampling;
+
+typedef uint8_t* Address;
+
+class PlatformData;
+
+// We can't new/delete the type safely without defining it
+// (-Wdelete-incomplete).  Use these to hide the details from clients.
+struct PlatformDataDestructor {
+  void operator()(PlatformData*);
+};
+
+typedef UniquePtr<PlatformData, PlatformDataDestructor> UniquePlatformData;
+UniquePlatformData AllocPlatformData(BaseProfilerThreadId aThreadId);
+
+// Convert the array of strings to a bitfield.
+uint32_t ParseFeaturesFromStringArray(const char** aFeatures,
+                                      uint32_t aFeatureCount,
+                                      bool aIsStartup = false);
+
+// Flags to conveniently track various JS instrumentations.
+enum class JSInstrumentationFlags {
+  StackSampling = 0x1,
+  Allocations = 0x2,
+};
+
+// Record an exit profile from a child process.
+void profiler_received_exit_profile(const std::string& aExitProfile);
+
+// Extract all received exit profiles that have not yet expired (i.e., they
+// still intersect with this process' buffer range).
+Vector<std::string> profiler_move_exit_profiles();
+
+}  // namespace baseprofiler
+}  // namespace mozilla
+
+#endif /* ndef TOOLS_PLATFORM_H_ */
diff --git a/mozglue/baseprofiler/core/shared-libraries-linux.cc b/mozglue/baseprofiler/core/shared-libraries-linux.cc
new file mode 100644
index 0000000000..84680bb59b
--- /dev/null
+++ b/mozglue/baseprofiler/core/shared-libraries-linux.cc
@@ -0,0 +1,855 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "BaseProfilerSharedLibraries.h"
+
+#define PATH_MAX_TOSTRING(x) #x
+#define PATH_MAX_STRING(x) PATH_MAX_TOSTRING(x)
+#include <stdio.h>
+#include <string.h>
+#include <limits.h>
+#include <unistd.h>
+#include <fstream>
+#include "platform.h"
+#include "mozilla/Sprintf.h"
+
+#include <algorithm>
+#include <arpa/inet.h>
+#include <elf.h>
+#include <fcntl.h>
+#if defined(GP_OS_linux) || defined(GP_OS_android)
+#  include <features.h>
+#endif
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <vector>
+
+#if defined(GP_OS_linux) || defined(GP_OS_android) || defined(GP_OS_freebsd)
+#  include <link.h>  // dl_phdr_info, ElfW()
+#else
+#  error "Unexpected configuration"
+#endif
+
+#if defined(GP_OS_android)
+extern "C" MOZ_EXPORT __attribute__((weak)) int dl_iterate_phdr(
+    int (*callback)(struct dl_phdr_info* info, size_t size, void* data),
+    void* data);
+#endif
+
+#if defined(GP_OS_freebsd) && !defined(ElfW)
+#  define ElfW(type) Elf_##type
+#endif
+
+// ----------------------------------------------------------------------------
+// Starting imports from toolkit/crashreporter/google-breakpad/, as needed by
+// this file when moved to mozglue.
+
+// Imported from
+// toolkit/crashreporter/google-breakpad/src/common/memory_range.h.
+// A lightweight wrapper with a pointer and a length to encapsulate a contiguous
+// range of memory. It provides helper methods for checked access of a subrange
+// of the memory. Its implemementation does not allocate memory or call into
+// libc functions, and is thus safer to use in a crashed environment.
+class MemoryRange {
+ public:
+  MemoryRange() : data_(NULL), length_(0) {}
+
+  MemoryRange(const void* data, size_t length) { Set(data, length); }
+
+  // Returns true if this memory range contains no data.
+  bool IsEmpty() const {
+    // Set() guarantees that |length_| is zero if |data_| is NULL.
+    return length_ == 0;
+  }
+
+  // Resets to an empty range.
+  void Reset() {
+    data_ = NULL;
+    length_ = 0;
+  }
+
+  // Sets this memory range to point to |data| and its length to |length|.
+  void Set(const void* data, size_t length) {
+    data_ = reinterpret_cast<const uint8_t*>(data);
+    // Always set |length_| to zero if |data_| is NULL.
+    length_ = data ? length : 0;
+  }
+
+  // Returns true if this range covers a subrange of |sub_length| bytes
+  // at |sub_offset| bytes of this memory range, or false otherwise.
+  bool Covers(size_t sub_offset, size_t sub_length) const {
+    // The following checks verify that:
+    // 1. sub_offset is within [ 0 .. length_ - 1 ]
+    // 2. sub_offset + sub_length is within
+    //    [ sub_offset .. length_ ]
+    return sub_offset < length_ && sub_offset + sub_length >= sub_offset &&
+           sub_offset + sub_length <= length_;
+  }
+
+  // Returns a raw data pointer to a subrange of |sub_length| bytes at
+  // |sub_offset| bytes of this memory range, or NULL if the subrange
+  // is out of bounds.
+  const void* GetData(size_t sub_offset, size_t sub_length) const {
+    return Covers(sub_offset, sub_length) ? (data_ + sub_offset) : NULL;
+  }
+
+  // Same as the two-argument version of GetData() but uses sizeof(DataType)
+  // as the subrange length and returns an |DataType| pointer for convenience.
+  template <typename DataType>
+  const DataType* GetData(size_t sub_offset) const {
+    return reinterpret_cast<const DataType*>(
+        GetData(sub_offset, sizeof(DataType)));
+  }
+
+  // Returns a raw pointer to the |element_index|-th element of an array
+  // of elements of length |element_size| starting at |sub_offset| bytes
+  // of this memory range, or NULL if the element is out of bounds.
+  const void* GetArrayElement(size_t element_offset, size_t element_size,
+                              unsigned element_index) const {
+    size_t sub_offset = element_offset + element_index * element_size;
+    return GetData(sub_offset, element_size);
+  }
+
+  // Same as the three-argument version of GetArrayElement() but deduces
+  // the element size using sizeof(ElementType) and returns an |ElementType|
+  // pointer for convenience.
+  template <typename ElementType>
+  const ElementType* GetArrayElement(size_t element_offset,
+                                     unsigned element_index) const {
+    return reinterpret_cast<const ElementType*>(
+        GetArrayElement(element_offset, sizeof(ElementType), element_index));
+  }
+
+  // Returns a subrange of |sub_length| bytes at |sub_offset| bytes of
+  // this memory range, or an empty range if the subrange is out of bounds.
+  MemoryRange Subrange(size_t sub_offset, size_t sub_length) const {
+    return Covers(sub_offset, sub_length)
+               ? MemoryRange(data_ + sub_offset, sub_length)
+               : MemoryRange();
+  }
+
+  // Returns a pointer to the beginning of this memory range.
+  const uint8_t* data() const { return data_; }
+
+  // Returns the length, in bytes, of this memory range.
+  size_t length() const { return length_; }
+
+ private:
+  // Pointer to the beginning of this memory range.
+  const uint8_t* data_;
+
+  // Length, in bytes, of this memory range.
+  size_t length_;
+};
+
+// Imported from
+// toolkit/crashreporter/google-breakpad/src/common/linux/memory_mapped_file.h
+// and inlined .cc.
+// A utility class for mapping a file into memory for read-only access of the
+// file content. Its implementation avoids calling into libc functions by
+// directly making system calls for open, close, mmap, and munmap.
+class MemoryMappedFile {
+ public:
+  MemoryMappedFile() {}
+
+  // Constructor that calls Map() to map a file at |path| into memory.
+  // If Map() fails, the object behaves as if it is default constructed.
+  MemoryMappedFile(const char* path, size_t offset) { Map(path, offset); }
+
+  MemoryMappedFile(const MemoryMappedFile&) = delete;
+  MemoryMappedFile& operator=(const MemoryMappedFile&) = delete;
+
+  ~MemoryMappedFile() {}
+
+  // Maps a file at |path| into memory, which can then be accessed via
+  // content() as a MemoryRange object or via data(), and returns true on
+  // success. Mapping an empty file will succeed but with data() and size()
+  // returning NULL and 0, respectively. An existing mapping is unmapped
+  // before a new mapping is created.
+  bool Map(const char* path, size_t offset) {
+    Unmap();
+
+    int fd = open(path, O_RDONLY, 0);
+    if (fd == -1) {
+      return false;
+    }
+
+#if defined(__x86_64__) || defined(__aarch64__) || \
+    (defined(__mips__) && _MIPS_SIM == _ABI64) ||  \
+    !(defined(GP_OS_linux) || defined(GP_OS_android))
+
+    struct stat st;
+    if (fstat(fd, &st) == -1 || st.st_size < 0) {
+#else
+    struct stat64 st;
+    if (fstat64(fd, &st) == -1 || st.st_size < 0) {
+#endif
+      close(fd);
+      return false;
+    }
+
+    // Strangely file size can be negative, but we check above that it is not.
+    size_t file_len = static_cast<size_t>(st.st_size);
+    // If the file does not extend beyond the offset, simply use an empty
+    // MemoryRange and return true. Don't bother to call mmap()
+    // even though mmap() can handle an empty file on some platforms.
+    if (offset >= file_len) {
+      close(fd);
+      return true;
+    }
+
+    void* data = mmap(NULL, file_len, PROT_READ, MAP_PRIVATE, fd, offset);
+    close(fd);
+    if (data == MAP_FAILED) {
+      return false;
+    }
+
+    content_.Set(data, file_len - offset);
+    return true;
+  }
+
+  // Unmaps the memory for the mapped file. It's a no-op if no file is
+  // mapped.
+  void Unmap() {
+    if (content_.data()) {
+      munmap(const_cast<uint8_t*>(content_.data()), content_.length());
+      content_.Set(NULL, 0);
+    }
+  }
+
+  // Returns a MemoryRange object that covers the memory for the mapped
+  // file. The MemoryRange object is empty if no file is mapped.
+  const MemoryRange& content() const { return content_; }
+
+  // Returns a pointer to the beginning of the memory for the mapped file.
+  // or NULL if no file is mapped or the mapped file is empty.
+  const void* data() const { return content_.data(); }
+
+  // Returns the size in bytes of the mapped file, or zero if no file
+  // is mapped.
+  size_t size() const { return content_.length(); }
+
+ private:
+  // Mapped file content as a MemoryRange object.
+  MemoryRange content_;
+};
+
+// Imported from
+// toolkit/crashreporter/google-breakpad/src/common/linux/file_id.h and inlined
+// .cc.
+// GNU binutils' ld defaults to 'sha1', which is 160 bits == 20 bytes,
+// so this is enough to fit that, which most binaries will use.
+// This is just a sensible default for vectors so most callers can get away with
+// stack allocation.
+static const size_t kDefaultBuildIdSize = 20;
+
+// Used in a few places for backwards-compatibility.
+typedef struct {
+  uint32_t data1;
+  uint16_t data2;
+  uint16_t data3;
+  uint8_t data4[8];
+} MDGUID; /* GUID */
+
+const size_t kMDGUIDSize = sizeof(MDGUID);
+
+class FileID {
+ public:
+  explicit FileID(const char* path) : path_(path) {}
+  ~FileID() {}
+
+  // Load the identifier for the elf file path specified in the constructor into
+  // |identifier|.
+  //
+  // The current implementation will look for a .note.gnu.build-id
+  // section and use that as the file id, otherwise it falls back to
+  // XORing the first 4096 bytes of the .text section to generate an identifier.
+  bool ElfFileIdentifier(std::vector<uint8_t>& identifier) {
+    MemoryMappedFile mapped_file(path_.c_str(), 0);
+    if (!mapped_file.data())  // Should probably check if size >= ElfW(Ehdr)?
+      return false;
+
+    return ElfFileIdentifierFromMappedFile(mapped_file.data(), identifier);
+  }
+
+  // Traits classes so consumers can write templatized code to deal
+  // with specific ELF bits.
+  struct ElfClass32 {
+    typedef Elf32_Addr Addr;
+    typedef Elf32_Ehdr Ehdr;
+    typedef Elf32_Nhdr Nhdr;
+    typedef Elf32_Phdr Phdr;
+    typedef Elf32_Shdr Shdr;
+    typedef Elf32_Half Half;
+    typedef Elf32_Off Off;
+    typedef Elf32_Sym Sym;
+    typedef Elf32_Word Word;
+
+    static const int kClass = ELFCLASS32;
+    static const uint16_t kMachine = EM_386;
+    static const size_t kAddrSize = sizeof(Elf32_Addr);
+    static constexpr const char* kMachineName = "x86";
+  };
+
+  struct ElfClass64 {
+    typedef Elf64_Addr Addr;
+    typedef Elf64_Ehdr Ehdr;
+    typedef Elf64_Nhdr Nhdr;
+    typedef Elf64_Phdr Phdr;
+    typedef Elf64_Shdr Shdr;
+    typedef Elf64_Half Half;
+    typedef Elf64_Off Off;
+    typedef Elf64_Sym Sym;
+    typedef Elf64_Word Word;
+
+    static const int kClass = ELFCLASS64;
+    static const uint16_t kMachine = EM_X86_64;
+    static const size_t kAddrSize = sizeof(Elf64_Addr);
+    static constexpr const char* kMachineName = "x86_64";
+  };
+
+  // Internal helper method, exposed for convenience for callers
+  // that already have more info.
+  template <typename ElfClass>
+  static const typename ElfClass::Shdr* FindElfSectionByName(
+      const char* name, typename ElfClass::Word section_type,
+      const typename ElfClass::Shdr* sections, const char* section_names,
+      const char* names_end, int nsection) {
+    if (!name || !sections || nsection == 0) {
+      return NULL;
+    }
+
+    int name_len = strlen(name);
+    if (name_len == 0) return NULL;
+
+    for (int i = 0; i < nsection; ++i) {
+      const char* section_name = section_names + sections[i].sh_name;
+      if (sections[i].sh_type == section_type &&
+          names_end - section_name >= name_len + 1 &&
+          strcmp(name, section_name) == 0) {
+        return sections + i;
+      }
+    }
+    return NULL;
+  }
+
+  struct ElfSegment {
+    const void* start;
+    size_t size;
+  };
+
+  // Convert an offset from an Elf header into a pointer to the mapped
+  // address in the current process. Takes an extra template parameter
+  // to specify the return type to avoid having to dynamic_cast the
+  // result.
+  template <typename ElfClass, typename T>
+  static const T* GetOffset(const typename ElfClass::Ehdr* elf_header,
+                            typename ElfClass::Off offset) {
+    return reinterpret_cast<const T*>(reinterpret_cast<uintptr_t>(elf_header) +
+                                      offset);
+  }
+
+// ELF note name and desc are 32-bits word padded.
+#define NOTE_PADDING(a) ((a + 3) & ~3)
+
+  static bool ElfClassBuildIDNoteIdentifier(const void* section, size_t length,
+                                            std::vector<uint8_t>& identifier) {
+    static_assert(sizeof(ElfClass32::Nhdr) == sizeof(ElfClass64::Nhdr),
+                  "Elf32_Nhdr and Elf64_Nhdr should be the same");
+    typedef typename ElfClass32::Nhdr Nhdr;
+
+    const void* section_end = reinterpret_cast<const char*>(section) + length;
+    const Nhdr* note_header = reinterpret_cast<const Nhdr*>(section);
+    while (reinterpret_cast<const void*>(note_header) < section_end) {
+      if (note_header->n_type == NT_GNU_BUILD_ID) break;
+      note_header = reinterpret_cast<const Nhdr*>(
+          reinterpret_cast<const char*>(note_header) + sizeof(Nhdr) +
+          NOTE_PADDING(note_header->n_namesz) +
+          NOTE_PADDING(note_header->n_descsz));
+    }
+    if (reinterpret_cast<const void*>(note_header) >= section_end ||
+        note_header->n_descsz == 0) {
+      return false;
+    }
+
+    const uint8_t* build_id = reinterpret_cast<const uint8_t*>(note_header) +
+                              sizeof(Nhdr) +
+                              NOTE_PADDING(note_header->n_namesz);
+    identifier.insert(identifier.end(), build_id,
+                      build_id + note_header->n_descsz);
+
+    return true;
+  }
+
+  template <typename ElfClass>
+  static bool FindElfClassSection(const char* elf_base,
+                                  const char* section_name,
+                                  typename ElfClass::Word section_type,
+                                  const void** section_start,
+                                  size_t* section_size) {
+    typedef typename ElfClass::Ehdr Ehdr;
+    typedef typename ElfClass::Shdr Shdr;
+
+    if (!elf_base || !section_start || !section_size) {
+      return false;
+    }
+
+    if (strncmp(elf_base, ELFMAG, SELFMAG) != 0) {
+      return false;
+    }
+
+    const Ehdr* elf_header = reinterpret_cast<const Ehdr*>(elf_base);
+    if (elf_header->e_ident[EI_CLASS] != ElfClass::kClass) {
+      return false;
+    }
+
+    const Shdr* sections =
+        GetOffset<ElfClass, Shdr>(elf_header, elf_header->e_shoff);
+    const Shdr* section_names = sections + elf_header->e_shstrndx;
+    const char* names =
+        GetOffset<ElfClass, char>(elf_header, section_names->sh_offset);
+    const char* names_end = names + section_names->sh_size;
+
+    const Shdr* section =
+        FindElfSectionByName<ElfClass>(section_name, section_type, sections,
+                                       names, names_end, elf_header->e_shnum);
+
+    if (section != NULL && section->sh_size > 0) {
+      *section_start = elf_base + section->sh_offset;
+      *section_size = section->sh_size;
+    }
+
+    return true;
+  }
+
+  template <typename ElfClass>
+  static bool FindElfClassSegment(const char* elf_base,
+                                  typename ElfClass::Word segment_type,
+                                  std::vector<ElfSegment>* segments) {
+    typedef typename ElfClass::Ehdr Ehdr;
+    typedef typename ElfClass::Phdr Phdr;
+
+    if (!elf_base || !segments) {
+      return false;
+    }
+
+    if (strncmp(elf_base, ELFMAG, SELFMAG) != 0) {
+      return false;
+    }
+
+    const Ehdr* elf_header = reinterpret_cast<const Ehdr*>(elf_base);
+    if (elf_header->e_ident[EI_CLASS] != ElfClass::kClass) {
+      return false;
+    }
+
+    const Phdr* phdrs =
+        GetOffset<ElfClass, Phdr>(elf_header, elf_header->e_phoff);
+
+    for (int i = 0; i < elf_header->e_phnum; ++i) {
+      if (phdrs[i].p_type == segment_type) {
+        ElfSegment seg = {};
+        seg.start = elf_base + phdrs[i].p_offset;
+        seg.size = phdrs[i].p_filesz;
+        segments->push_back(seg);
+      }
+    }
+
+    return true;
+  }
+
+  static bool IsValidElf(const void* elf_base) {
+    return strncmp(reinterpret_cast<const char*>(elf_base), ELFMAG, SELFMAG) ==
+           0;
+  }
+
+  static int ElfClass(const void* elf_base) {
+    const ElfW(Ehdr)* elf_header =
+        reinterpret_cast<const ElfW(Ehdr)*>(elf_base);
+
+    return elf_header->e_ident[EI_CLASS];
+  }
+
+  static bool FindElfSection(const void* elf_mapped_base,
+                             const char* section_name, uint32_t section_type,
+                             const void** section_start, size_t* section_size) {
+    if (!elf_mapped_base || !section_start || !section_size) {
+      return false;
+    }
+
+    *section_start = NULL;
+    *section_size = 0;
+
+    if (!IsValidElf(elf_mapped_base)) return false;
+
+    int cls = ElfClass(elf_mapped_base);
+    const char* elf_base = static_cast<const char*>(elf_mapped_base);
+
+    if (cls == ELFCLASS32) {
+      return FindElfClassSection<ElfClass32>(elf_base, section_name,
+                                             section_type, section_start,
+                                             section_size) &&
+             *section_start != NULL;
+    } else if (cls == ELFCLASS64) {
+      return FindElfClassSection<ElfClass64>(elf_base, section_name,
+                                             section_type, section_start,
+                                             section_size) &&
+             *section_start != NULL;
+    }
+
+    return false;
+  }
+
+  static bool FindElfSegments(const void* elf_mapped_base,
+                              uint32_t segment_type,
+                              std::vector<ElfSegment>* segments) {
+    if (!elf_mapped_base || !segments) {
+      return false;
+    }
+
+    if (!IsValidElf(elf_mapped_base)) return false;
+
+    int cls = ElfClass(elf_mapped_base);
+    const char* elf_base = static_cast<const char*>(elf_mapped_base);
+
+    if (cls == ELFCLASS32) {
+      return FindElfClassSegment<ElfClass32>(elf_base, segment_type, segments);
+    }
+    if (cls == ELFCLASS64) {
+      return FindElfClassSegment<ElfClass64>(elf_base, segment_type, segments);
+    }
+
+    return false;
+  }
+
+  // Attempt to locate a .note.gnu.build-id section in an ELF binary
+  // and copy it into |identifier|.
+  static bool FindElfBuildIDNote(const void* elf_mapped_base,
+                                 std::vector<uint8_t>& identifier) {
+    // lld normally creates 2 PT_NOTEs, gold normally creates 1.
+    std::vector<ElfSegment> segs;
+    if (FindElfSegments(elf_mapped_base, PT_NOTE, &segs)) {
+      for (ElfSegment& seg : segs) {
+        if (ElfClassBuildIDNoteIdentifier(seg.start, seg.size, identifier)) {
+          return true;
+        }
+      }
+    }
+
+    void* note_section;
+    size_t note_size;
+    if (FindElfSection(elf_mapped_base, ".note.gnu.build-id", SHT_NOTE,
+                       (const void**)&note_section, &note_size)) {
+      return ElfClassBuildIDNoteIdentifier(note_section, note_size, identifier);
+    }
+
+    return false;
+  }
+
+  // Attempt to locate the .text section of an ELF binary and generate
+  // a simple hash by XORing the first page worth of bytes into |identifier|.
+  static bool HashElfTextSection(const void* elf_mapped_base,
+                                 std::vector<uint8_t>& identifier) {
+    identifier.resize(kMDGUIDSize);
+
+    void* text_section;
+    size_t text_size;
+    if (!FindElfSection(elf_mapped_base, ".text", SHT_PROGBITS,
+                        (const void**)&text_section, &text_size) ||
+        text_size == 0) {
+      return false;
+    }
+
+    // Only provide |kMDGUIDSize| bytes to keep identifiers produced by this
+    // function backwards-compatible.
+    memset(&identifier[0], 0, kMDGUIDSize);
+    const uint8_t* ptr = reinterpret_cast<const uint8_t*>(text_section);
+    const uint8_t* ptr_end =
+        ptr + std::min(text_size, static_cast<size_t>(4096));
+    while (ptr < ptr_end) {
+      for (unsigned i = 0; i < kMDGUIDSize; i++) identifier[i] ^= ptr[i];
+      ptr += kMDGUIDSize;
+    }
+    return true;
+  }
+
+  // Load the identifier for the elf file mapped into memory at |base| into
+  // |identifier|. Return false if the identifier could not be created for this
+  // file.
+  static bool ElfFileIdentifierFromMappedFile(
+      const void* base, std::vector<uint8_t>& identifier) {
+    // Look for a build id note first.
+    if (FindElfBuildIDNote(base, identifier)) return true;
+
+    // Fall back on hashing the first page of the text section.
+    return HashElfTextSection(base, identifier);
+  }
+
+  // These three functions are not ever called in an unsafe context, so it's OK
+  // to allocate memory and use libc.
+  static std::string bytes_to_hex_string(const uint8_t* bytes, size_t count,
+                                         bool lowercase = false) {
+    std::string result;
+    for (unsigned int idx = 0; idx < count; ++idx) {
+      char buf[3];
+      SprintfLiteral(buf, lowercase ? "%02x" : "%02X", bytes[idx]);
+      result.append(buf);
+    }
+    return result;
+  }
+
+  // Convert the |identifier| data to a string.  The string will
+  // be formatted as a UUID in all uppercase without dashes.
+  // (e.g., 22F065BBFC9C49F780FE26A7CEBD7BCE).
+  static std::string ConvertIdentifierToUUIDString(
+      const std::vector<uint8_t>& identifier) {
+    uint8_t identifier_swapped[kMDGUIDSize] = {0};
+
+    // Endian-ness swap to match dump processor expectation.
+    memcpy(identifier_swapped, &identifier[0],
+           std::min(kMDGUIDSize, identifier.size()));
+    uint32_t* data1 = reinterpret_cast<uint32_t*>(identifier_swapped);
+    *data1 = htonl(*data1);
+    uint16_t* data2 = reinterpret_cast<uint16_t*>(identifier_swapped + 4);
+    *data2 = htons(*data2);
+    uint16_t* data3 = reinterpret_cast<uint16_t*>(identifier_swapped + 6);
+    *data3 = htons(*data3);
+
+    return bytes_to_hex_string(identifier_swapped, kMDGUIDSize);
+  }
+
+  // Convert the entire |identifier| data to a lowercase hex string.
+  static std::string ConvertIdentifierToString(
+      const std::vector<uint8_t>& identifier) {
+    return bytes_to_hex_string(&identifier[0], identifier.size(),
+                               /* lowercase */ true);
+  }
+
+ private:
+  // Storage for the path specified
+  std::string path_;
+};
+
+// End of imports from toolkit/crashreporter/google-breakpad/.
+// ----------------------------------------------------------------------------
+
+struct LoadedLibraryInfo {
+  LoadedLibraryInfo(const char* aName, unsigned long aBaseAddress,
+                    unsigned long aFirstMappingStart,
+                    unsigned long aLastMappingEnd)
+      : mName(aName),
+        mBaseAddress(aBaseAddress),
+        mFirstMappingStart(aFirstMappingStart),
+        mLastMappingEnd(aLastMappingEnd) {}
+
+  std::string mName;
+  unsigned long mBaseAddress;
+  unsigned long mFirstMappingStart;
+  unsigned long mLastMappingEnd;
+};
+
+static std::string IDtoUUIDString(const std::vector<uint8_t>& aIdentifier) {
+  std::string uuid = FileID::ConvertIdentifierToUUIDString(aIdentifier);
+  // This is '0', not '\0', since it represents the breakpad id age.
+  uuid += '0';
+  return uuid;
+}
+
+// Return raw Build ID in hex.
+static std::string IDtoString(const std::vector<uint8_t>& aIdentifier) {
+  std::string uuid = FileID::ConvertIdentifierToString(aIdentifier);
+  return uuid;
+}
+
+// Get the breakpad Id for the binary file pointed by bin_name
+static std::string getBreakpadId(const char* bin_name) {
+  std::vector<uint8_t> identifier;
+  identifier.reserve(kDefaultBuildIdSize);
+
+  FileID file_id(bin_name);
+  if (file_id.ElfFileIdentifier(identifier)) {
+    return IDtoUUIDString(identifier);
+  }
+
+  return {};
+}
+
+// Get the code Id for the binary file pointed by bin_name
+static std::string getCodeId(const char* bin_name) {
+  std::vector<uint8_t> identifier;
+  identifier.reserve(kDefaultBuildIdSize);
+
+  FileID file_id(bin_name);
+  if (file_id.ElfFileIdentifier(identifier)) {
+    return IDtoString(identifier);
+  }
+
+  return {};
+}
+
+static SharedLibrary SharedLibraryAtPath(const char* path,
+                                         unsigned long libStart,
+                                         unsigned long libEnd,
+                                         unsigned long offset = 0) {
+  std::string pathStr = path;
+
+  size_t pos = pathStr.rfind('\\');
+  std::string nameStr =
+      (pos != std::string::npos) ? pathStr.substr(pos + 1) : pathStr;
+
+  return SharedLibrary(libStart, libEnd, offset, getBreakpadId(path),
+                       getCodeId(path), nameStr, pathStr, nameStr, pathStr,
+                       std::string{}, "");
+}
+
+static int dl_iterate_callback(struct dl_phdr_info* dl_info, size_t size,
+                               void* data) {
+  auto libInfoList = reinterpret_cast<std::vector<LoadedLibraryInfo>*>(data);
+
+  if (dl_info->dlpi_phnum <= 0) return 0;
+
+  unsigned long baseAddress = dl_info->dlpi_addr;
+  unsigned long firstMappingStart = -1;
+  unsigned long lastMappingEnd = 0;
+
+  for (size_t i = 0; i < dl_info->dlpi_phnum; i++) {
+    if (dl_info->dlpi_phdr[i].p_type != PT_LOAD) {
+      continue;
+    }
+    unsigned long start = dl_info->dlpi_addr + dl_info->dlpi_phdr[i].p_vaddr;
+    unsigned long end = start + dl_info->dlpi_phdr[i].p_memsz;
+    if (start < firstMappingStart) {
+      firstMappingStart = start;
+    }
+    if (end > lastMappingEnd) {
+      lastMappingEnd = end;
+    }
+  }
+
+  libInfoList->push_back(LoadedLibraryInfo(dl_info->dlpi_name, baseAddress,
+                                           firstMappingStart, lastMappingEnd));
+
+  return 0;
+}
+
+SharedLibraryInfo SharedLibraryInfo::GetInfoForSelf() {
+  SharedLibraryInfo info;
+
+#if defined(GP_OS_linux)
+  // We need to find the name of the executable (exeName, exeNameLen) and the
+  // address of its executable section (exeExeAddr) in the running image.
+  char exeName[PATH_MAX];
+  memset(exeName, 0, sizeof(exeName));
+
+  ssize_t exeNameLen = readlink("/proc/self/exe", exeName, sizeof(exeName) - 1);
+  if (exeNameLen == -1) {
+    // readlink failed for whatever reason.  Note this, but keep going.
+    exeName[0] = '\0';
+    exeNameLen = 0;
+    // LOG("SharedLibraryInfo::GetInfoForSelf(): readlink failed");
+  } else {
+    // Assert no buffer overflow.
+    MOZ_RELEASE_ASSERT(exeNameLen >= 0 &&
+                       exeNameLen < static_cast<ssize_t>(sizeof(exeName)));
+  }
+
+  unsigned long exeExeAddr = 0;
+#endif
+
+#if defined(GP_OS_android)
+  // If dl_iterate_phdr doesn't exist, we give up immediately.
+  if (!dl_iterate_phdr) {
+    // On ARM Android, dl_iterate_phdr is provided by the custom linker.
+    // So if libxul was loaded by the system linker (e.g. as part of
+    // xpcshell when running tests), it won't be available and we should
+    // not call it.
+    return info;
+  }
+#endif
+
+#if defined(GP_OS_linux) || defined(GP_OS_android)
+  // Read info from /proc/self/maps. We ignore most of it.
+  pid_t pid = mozilla::baseprofiler::profiler_current_process_id().ToNumber();
+  char path[PATH_MAX];
+  SprintfLiteral(path, "/proc/%d/maps", pid);
+  std::ifstream maps(path);
+  std::string line;
+  while (std::getline(maps, line)) {
+    int ret;
+    unsigned long start;
+    unsigned long end;
+    char perm[6 + 1] = "";
+    unsigned long offset;
+    char modulePath[PATH_MAX + 1] = "";
+    ret = sscanf(line.c_str(),
+                 "%lx-%lx %6s %lx %*s %*x %" PATH_MAX_STRING(PATH_MAX) "s\n",
+                 &start, &end, perm, &offset, modulePath);
+    if (!strchr(perm, 'x')) {
+      // Ignore non executable entries
+      continue;
+    }
+    if (ret != 5 && ret != 4) {
+      // LOG("SharedLibraryInfo::GetInfoForSelf(): "
+      //     "reading /proc/self/maps failed");
+      continue;
+    }
+
+#  if defined(GP_OS_linux)
+    // Try to establish the main executable's load address.
+    if (exeNameLen > 0 && strcmp(modulePath, exeName) == 0) {
+      exeExeAddr = start;
+    }
+#  elif defined(GP_OS_android)
+    // Use /proc/pid/maps to get the dalvik-jit section since it has no
+    // associated phdrs.
+    if (0 == strcmp(modulePath, "/dev/ashmem/dalvik-jit-code-cache")) {
+      info.AddSharedLibrary(
+          SharedLibraryAtPath(modulePath, start, end, offset));
+      if (info.GetSize() > 10000) {
+        // LOG("SharedLibraryInfo::GetInfoForSelf(): "
+        //     "implausibly large number of mappings acquired");
+        break;
+      }
+    }
+#  endif
+  }
+#endif
+
+  std::vector<LoadedLibraryInfo> libInfoList;
+
+  // We collect the bulk of the library info using dl_iterate_phdr.
+  dl_iterate_phdr(dl_iterate_callback, &libInfoList);
+
+  for (const auto& libInfo : libInfoList) {
+    info.AddSharedLibrary(
+        SharedLibraryAtPath(libInfo.mName.c_str(), libInfo.mFirstMappingStart,
+                            libInfo.mLastMappingEnd,
+                            libInfo.mFirstMappingStart - libInfo.mBaseAddress));
+  }
+
+#if defined(GP_OS_linux)
+  // Make another pass over the information we just harvested from
+  // dl_iterate_phdr.  If we see a nameless object mapped at what we earlier
+  // established to be the main executable's load address, attach the
+  // executable's name to that entry.
+  for (size_t i = 0; i < info.GetSize(); i++) {
+    SharedLibrary& lib = info.GetMutableEntry(i);
+    if (lib.GetStart() <= exeExeAddr && exeExeAddr <= lib.GetEnd() &&
+        lib.GetDebugPath().empty()) {
+      lib = SharedLibraryAtPath(exeName, lib.GetStart(), lib.GetEnd(),
+                                lib.GetOffset());
+
+      // We only expect to see one such entry.
+      break;
+    }
+  }
+#endif
+
+  return info;
+}
+
+void SharedLibraryInfo::Initialize() { /* do nothing */
+}
diff --git a/mozglue/baseprofiler/core/shared-libraries-macos.cc b/mozglue/baseprofiler/core/shared-libraries-macos.cc
new file mode 100644
index 0000000000..f995581001
--- /dev/null
+++ b/mozglue/baseprofiler/core/shared-libraries-macos.cc
@@ -0,0 +1,206 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "BaseProfilerSharedLibraries.h"
+
+#include "platform.h"
+
+#include "mozilla/Unused.h"
+#include <AvailabilityMacros.h>
+
+#include <dlfcn.h>
+#include <mach-o/arch.h>
+#include <mach-o/dyld_images.h>
+#include <mach-o/dyld.h>
+#include <mach-o/loader.h>
+#include <mach/mach_init.h>
+#include <mach/mach_traps.h>
+#include <mach/task_info.h>
+#include <mach/task.h>
+#include <sstream>
+#include <stdlib.h>
+#include <string.h>
+#include <vector>
+
+// Architecture specific abstraction.
+#if defined(GP_ARCH_x86)
+typedef mach_header platform_mach_header;
+typedef segment_command mach_segment_command_type;
+#  define MACHO_MAGIC_NUMBER MH_MAGIC
+#  define CMD_SEGMENT LC_SEGMENT
+#  define seg_size uint32_t
+#else
+typedef mach_header_64 platform_mach_header;
+typedef segment_command_64 mach_segment_command_type;
+#  define MACHO_MAGIC_NUMBER MH_MAGIC_64
+#  define CMD_SEGMENT LC_SEGMENT_64
+#  define seg_size uint64_t
+#endif
+
+struct NativeSharedLibrary {
+  const platform_mach_header* header;
+  std::string path;
+};
+static std::vector<NativeSharedLibrary>* sSharedLibrariesList = nullptr;
+
+class MOZ_RAII SharedLibrariesLock {
+ public:
+  SharedLibrariesLock() { sSharedLibrariesMutex.Lock(); }
+
+  ~SharedLibrariesLock() { sSharedLibrariesMutex.Unlock(); }
+
+  SharedLibrariesLock(const SharedLibrariesLock&) = delete;
+  void operator=(const SharedLibrariesLock&) = delete;
+
+ private:
+  static mozilla::baseprofiler::detail::BaseProfilerMutex sSharedLibrariesMutex;
+};
+
+mozilla::baseprofiler::detail::BaseProfilerMutex
+    SharedLibrariesLock::sSharedLibrariesMutex;
+
+static void SharedLibraryAddImage(const struct mach_header* mh,
+                                  intptr_t vmaddr_slide) {
+  // NOTE: Presumably for backwards-compatibility reasons, this function accepts
+  // a mach_header even on 64-bit where it ought to be a mach_header_64. We cast
+  // it to the right type here.
+  auto header = reinterpret_cast<const platform_mach_header*>(mh);
+
+  Dl_info info;
+  if (!dladdr(header, &info)) {
+    return;
+  }
+
+  SharedLibrariesLock lock;
+  if (!sSharedLibrariesList) {
+    return;
+  }
+
+  NativeSharedLibrary lib = {header, info.dli_fname};
+  sSharedLibrariesList->push_back(lib);
+}
+
+static void SharedLibraryRemoveImage(const struct mach_header* mh,
+                                     intptr_t vmaddr_slide) {
+  // NOTE: Presumably for backwards-compatibility reasons, this function accepts
+  // a mach_header even on 64-bit where it ought to be a mach_header_64. We cast
+  // it to the right type here.
+  auto header = reinterpret_cast<const platform_mach_header*>(mh);
+
+  SharedLibrariesLock lock;
+  if (!sSharedLibrariesList) {
+    return;
+  }
+
+  uint32_t count = sSharedLibrariesList->size();
+  for (uint32_t i = 0; i < count; ++i) {
+    if ((*sSharedLibrariesList)[i].header == header) {
+      sSharedLibrariesList->erase(sSharedLibrariesList->begin() + i);
+      return;
+    }
+  }
+}
+
+void SharedLibraryInfo::Initialize() {
+  // NOTE: We intentionally leak this memory here. We're allocating dynamically
+  // in order to avoid static initializers.
+  sSharedLibrariesList = new std::vector<NativeSharedLibrary>();
+
+  _dyld_register_func_for_add_image(SharedLibraryAddImage);
+  _dyld_register_func_for_remove_image(SharedLibraryRemoveImage);
+}
+
+static void addSharedLibrary(const platform_mach_header* header,
+                             const char* path, SharedLibraryInfo& info) {
+  const struct load_command* cmd =
+      reinterpret_cast<const struct load_command*>(header + 1);
+
+  seg_size size = 0;
+  unsigned long long start = reinterpret_cast<unsigned long long>(header);
+  // Find the cmd segment in the macho image. It will contain the offset we care
+  // about.
+  const uint8_t* uuid_bytes = nullptr;
+  for (unsigned int i = 0;
+       cmd && (i < header->ncmds) && (uuid_bytes == nullptr || size == 0);
+       ++i) {
+    if (cmd->cmd == CMD_SEGMENT) {
+      const mach_segment_command_type* seg =
+          reinterpret_cast<const mach_segment_command_type*>(cmd);
+
+      if (!strcmp(seg->segname, "__TEXT")) {
+        size = seg->vmsize;
+      }
+    } else if (cmd->cmd == LC_UUID) {
+      const uuid_command* ucmd = reinterpret_cast<const uuid_command*>(cmd);
+      uuid_bytes = ucmd->uuid;
+    }
+
+    cmd = reinterpret_cast<const struct load_command*>(
+        reinterpret_cast<const char*>(cmd) + cmd->cmdsize);
+  }
+
+  std::string uuid;
+  std::string breakpadId;
+  if (uuid_bytes != nullptr) {
+    static constexpr char digits[16] = {'0', '1', '2', '3', '4', '5', '6', '7',
+                                        '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
+    for (int i = 0; i < 16; ++i) {
+      uint8_t byte = uuid_bytes[i];
+      uuid += digits[byte >> 4];
+      uuid += digits[byte & 0xFu];
+    }
+
+    // Breakpad id is the same as the uuid but with the additional trailing 0
+    // for the breakpad id age.
+    breakpadId = uuid;
+    // breakpad id age.
+    breakpadId += '0';
+  }
+
+  std::string pathStr = path;
+
+  size_t pos = pathStr.rfind('\\');
+  std::string nameStr =
+      (pos != std::string::npos) ? pathStr.substr(pos + 1) : pathStr;
+
+  const NXArchInfo* archInfo =
+      NXGetArchInfoFromCpuType(header->cputype, header->cpusubtype);
+
+  info.AddSharedLibrary(SharedLibrary(
+      start, start + size, 0, breakpadId, uuid, nameStr, pathStr, nameStr,
+      pathStr, std::string{}, archInfo ? archInfo->name : ""));
+}
+
+// Translate the statically stored sSharedLibrariesList information into a
+// SharedLibraryInfo object.
+SharedLibraryInfo SharedLibraryInfo::GetInfoForSelf() {
+  SharedLibrariesLock lock;
+  SharedLibraryInfo sharedLibraryInfo;
+
+  for (auto& info : *sSharedLibrariesList) {
+    addSharedLibrary(info.header, info.path.c_str(), sharedLibraryInfo);
+  }
+
+  // Add the entry for dyld itself.
+  // We only support macOS 10.12+, which corresponds to dyld version 15+.
+  // dyld version 15 added the dyldPath property.
+  task_dyld_info_data_t task_dyld_info;
+  mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT;
+  if (task_info(mach_task_self(), TASK_DYLD_INFO, (task_info_t)&task_dyld_info,
+                &count) != KERN_SUCCESS) {
+    return sharedLibraryInfo;
+  }
+
+  struct dyld_all_image_infos* aii =
+      (struct dyld_all_image_infos*)task_dyld_info.all_image_info_addr;
+  if (aii->version >= 15) {
+    const platform_mach_header* header =
+        reinterpret_cast<const platform_mach_header*>(
+            aii->dyldImageLoadAddress);
+    addSharedLibrary(header, aii->dyldPath, sharedLibraryInfo);
+  }
+
+  return sharedLibraryInfo;
+}
diff --git a/mozglue/baseprofiler/core/shared-libraries-win32.cc b/mozglue/baseprofiler/core/shared-libraries-win32.cc
new file mode 100644
index 0000000000..2a453612d3
--- /dev/null
+++ b/mozglue/baseprofiler/core/shared-libraries-win32.cc
@@ -0,0 +1,198 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <windows.h>
+
+#include "BaseProfilerSharedLibraries.h"
+
+#include "mozilla/glue/WindowsUnicode.h"
+#include "mozilla/NativeNt.h"
+#include "mozilla/WindowsEnumProcessModules.h"
+
+#include <cctype>
+#include <string>
+
+static constexpr char uppercaseDigits[16] = {'0', '1', '2', '3', '4', '5',
+                                             '6', '7', '8', '9', 'A', 'B',
+                                             'C', 'D', 'E', 'F'};
+static constexpr char lowercaseDigits[16] = {'0', '1', '2', '3', '4', '5',
+                                             '6', '7', '8', '9', 'a', 'b',
+                                             'c', 'd', 'e', 'f'};
+
+static void AppendHex(const unsigned char* aBegin, const unsigned char* aEnd,
+                      std::string& aOut) {
+  for (const unsigned char* p = aBegin; p < aEnd; ++p) {
+    unsigned char c = *p;
+    aOut += uppercaseDigits[c >> 4];
+    aOut += uppercaseDigits[c & 0xFu];
+  }
+}
+
+static constexpr bool WITH_PADDING = true;
+static constexpr bool WITHOUT_PADDING = false;
+static constexpr bool LOWERCASE = true;
+static constexpr bool UPPERCASE = false;
+template <typename T>
+static void AppendHex(T aValue, std::string& aOut, bool aWithPadding,
+                      bool aLowercase = UPPERCASE) {
+  for (int i = sizeof(T) * 2 - 1; i >= 0; --i) {
+    unsigned nibble = (aValue >> (i * 4)) & 0xFu;
+    // If no-padding requested, skip starting zeroes -- unless we're on the very
+    // last nibble (so we don't output a blank).
+    if (!aWithPadding && i != 0) {
+      if (nibble == 0) {
+        // Requested no padding, skip zeroes.
+        continue;
+      }
+      // Requested no padding, got first non-zero, pretend we now want padding
+      // so we don't skip zeroes anymore.
+      aWithPadding = true;
+    }
+    aOut += aLowercase ? lowercaseDigits[nibble] : uppercaseDigits[nibble];
+  }
+}
+
+static bool IsModuleUnsafeToLoad(const std::string& aModuleName) {
+  auto LowerCaseEqualsLiteral = [](char aModuleChar, char aDetouredChar) {
+    return std::tolower(aModuleChar) == aDetouredChar;
+  };
+
+  // Hackaround for Bug 1723868.  There is no safe way to prevent the module
+  // Microsoft's VP9 Video Decoder from being unloaded because mfplat.dll may
+  // have posted more than one task to unload the module in the work queue
+  // without calling LoadLibrary.
+  constexpr std::string_view vp9_decoder_dll = "msvp9dec_store.dll";
+  if (std::equal(aModuleName.cbegin(), aModuleName.cend(),
+                 vp9_decoder_dll.cbegin(), vp9_decoder_dll.cend(),
+                 LowerCaseEqualsLiteral)) {
+    return true;
+  }
+
+  return false;
+}
+
+void SharedLibraryInfo::AddSharedLibraryFromModuleInfo(
+    const wchar_t* aModulePath, mozilla::Maybe<HMODULE> aModule) {
+  mozilla::UniquePtr<char[]> utf8ModulePath(
+      mozilla::glue::WideToUTF8(aModulePath));
+  if (!utf8ModulePath) {
+    return;
+  }
+
+  std::string modulePathStr(utf8ModulePath.get());
+  size_t pos = modulePathStr.find_last_of("\\/");
+  std::string moduleNameStr = (pos != std::string::npos)
+                                  ? modulePathStr.substr(pos + 1)
+                                  : modulePathStr;
+
+  // If the module is unsafe to call LoadLibraryEx for, we skip.
+  if (IsModuleUnsafeToLoad(moduleNameStr)) {
+    return;
+  }
+
+  // Load the module again - to make sure that its handle will remain valid as
+  // we attempt to read the PDB information from it - or for the first time if
+  // we only have a path. We want to load the DLL without running the newly
+  // loaded module's DllMain function, but not as a data file because we want
+  // to be able to do RVA computations easily. Hence, we use the flag
+  // LOAD_LIBRARY_AS_IMAGE_RESOURCE which ensures that the sections (not PE
+  // headers) will be relocated by the loader. Otherwise GetPdbInfo() and/or
+  // GetVersionInfo() can cause a crash. If the original handle |aModule| is
+  // valid, LoadLibraryEx just increments its refcount.
+  nsModuleHandle handleLock(
+      ::LoadLibraryExW(aModulePath, NULL, LOAD_LIBRARY_AS_IMAGE_RESOURCE));
+  if (!handleLock) {
+    return;
+  }
+
+  mozilla::nt::PEHeaders headers(handleLock.get());
+  if (!headers) {
+    return;
+  }
+
+  mozilla::Maybe<mozilla::Range<const uint8_t>> bounds = headers.GetBounds();
+  if (!bounds) {
+    return;
+  }
+
+  // Put the original |aModule| into SharedLibrary, but we get debug info
+  // from |handleLock| as |aModule| might be inaccessible.
+  const uintptr_t modStart =
+      aModule.isSome() ? reinterpret_cast<uintptr_t>(*aModule)
+                       : reinterpret_cast<uintptr_t>(handleLock.get());
+  const uintptr_t modEnd = modStart + bounds->length();
+
+  std::string breakpadId;
+  std::string pdbPathStr;
+  std::string pdbNameStr;
+  if (const auto* debugInfo = headers.GetPdbInfo()) {
+    MOZ_ASSERT(breakpadId.empty());
+    const GUID& pdbSig = debugInfo->pdbSignature;
+    AppendHex(pdbSig.Data1, breakpadId, WITH_PADDING);
+    AppendHex(pdbSig.Data2, breakpadId, WITH_PADDING);
+    AppendHex(pdbSig.Data3, breakpadId, WITH_PADDING);
+    AppendHex(reinterpret_cast<const unsigned char*>(&pdbSig.Data4),
+              reinterpret_cast<const unsigned char*>(&pdbSig.Data4) +
+                  sizeof(pdbSig.Data4),
+              breakpadId);
+    AppendHex(debugInfo->pdbAge, breakpadId, WITHOUT_PADDING);
+
+    // The PDB file name could be different from module filename,
+    // so report both
+    // e.g. The PDB for C:\Windows\SysWOW64\ntdll.dll is wntdll.pdb
+    pdbPathStr = debugInfo->pdbFileName;
+    size_t pos = pdbPathStr.find_last_of("\\/");
+    pdbNameStr =
+        (pos != std::string::npos) ? pdbPathStr.substr(pos + 1) : pdbPathStr;
+  }
+
+  std::string codeId;
+  DWORD timestamp;
+  DWORD imageSize;
+  if (headers.GetTimeStamp(timestamp) && headers.GetImageSize(imageSize)) {
+    AppendHex(timestamp, codeId, WITH_PADDING);
+    AppendHex(imageSize, codeId, WITHOUT_PADDING, LOWERCASE);
+  }
+
+  std::string versionStr;
+  uint64_t version;
+  if (headers.GetVersionInfo(version)) {
+    versionStr += std::to_string((version >> 48) & 0xFFFF);
+    versionStr += '.';
+    versionStr += std::to_string((version >> 32) & 0xFFFF);
+    versionStr += '.';
+    versionStr += std::to_string((version >> 16) & 0xFFFF);
+    versionStr += '.';
+    versionStr += std::to_string(version & 0xFFFF);
+  }
+
+  SharedLibrary shlib(modStart, modEnd,
+                      0,  // DLLs are always mapped at offset 0 on Windows
+                      breakpadId, codeId, moduleNameStr, modulePathStr,
+                      pdbNameStr, pdbPathStr, versionStr, "");
+  AddSharedLibrary(shlib);
+}
+
+SharedLibraryInfo SharedLibraryInfo::GetInfoForSelf() {
+  SharedLibraryInfo sharedLibraryInfo;
+
+  auto addSharedLibraryFromModuleInfo =
+      [&sharedLibraryInfo](const wchar_t* aModulePath, HMODULE aModule) {
+        sharedLibraryInfo.AddSharedLibraryFromModuleInfo(
+            aModulePath, mozilla::Some(aModule));
+      };
+
+  mozilla::EnumerateProcessModules(addSharedLibraryFromModuleInfo);
+  return sharedLibraryInfo;
+}
+
+SharedLibraryInfo SharedLibraryInfo::GetInfoFromPath(const wchar_t* aPath) {
+  SharedLibraryInfo sharedLibraryInfo;
+  sharedLibraryInfo.AddSharedLibraryFromModuleInfo(aPath, mozilla::Nothing());
+  return sharedLibraryInfo;
+}
+
+void SharedLibraryInfo::Initialize() { /* do nothing */
+}
diff --git a/mozglue/baseprofiler/core/vtune/ittnotify.h b/mozglue/baseprofiler/core/vtune/ittnotify.h
new file mode 100644
index 0000000000..04adf9eb5e
--- /dev/null
+++ b/mozglue/baseprofiler/core/vtune/ittnotify.h
@@ -0,0 +1,4127 @@
+// clang-format off
+
+/* <copyright>
+  This file is provided under a dual BSD/GPLv2 license.  When using or
+  redistributing this file, you may do so under either license.
+
+  GPL LICENSE SUMMARY
+
+  Copyright (c) 2005-2014 Intel Corporation. All rights reserved.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of version 2 of the GNU General Public License as
+  published by the Free Software Foundation.
+
+  This program is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+  The full GNU General Public License is included in this distribution
+  in the file called LICENSE.GPL.
+
+  Contact Information:
+  http://software.intel.com/en-us/articles/intel-vtune-amplifier-xe/
+
+  BSD LICENSE
+
+  Copyright (c) 2005-2014 Intel Corporation. All rights reserved.
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions
+  are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in
+      the documentation and/or other materials provided with the
+      distribution.
+    * Neither the name of Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+</copyright> */
+#ifndef _ITTNOTIFY_H_
+#  define _ITTNOTIFY_H_
+
+/**
+@file
+@brief Public User API functions and types
+@mainpage
+
+The ITT API is used to annotate a user's program with additional information
+that can be used by correctness and performance tools. The user inserts
+calls in their program. Those calls generate information that is collected
+at runtime, and used by Intel(R) Threading Tools.
+
+@section API Concepts
+The following general concepts are used throughout the API.
+
+@subsection Unicode Support
+Many API functions take character string arguments. On Windows, there
+are two versions of each such function. The function name is suffixed
+by W if Unicode support is enabled, and by A otherwise. Any API function
+that takes a character string argument adheres to this convention.
+
+@subsection Conditional Compilation
+Many users prefer having an option to modify ITT API code when linking it
+inside their runtimes. ITT API header file provides a mechanism to replace
+ITT API function names inside your code with empty strings. To do this,
+define the macros INTEL_NO_ITTNOTIFY_API during compilation and remove the
+static library from the linker script.
+
+@subsection Domains
+[see domains]
+Domains provide a way to separate notification for different modules or
+libraries in a program. Domains are specified by dotted character strings,
+e.g. TBB.Internal.Control.
+
+A mechanism (to be specified) is provided to enable and disable
+domains. By default, all domains are enabled.
+@subsection Named Entities and Instances
+Named entities (frames, regions, tasks, and markers) communicate
+information about the program to the analysis tools. A named entity often
+refers to a section of program code, or to some set of logical concepts
+that the programmer wants to group together.
+
+Named entities relate to the programmer's static view of the program. When
+the program actually executes, many instances of a given named entity
+may be created.
+
+The API annotations denote instances of named entities. The actual
+named entities are displayed using the analysis tools. In other words,
+the named entities come into existence when instances are created.
+
+Instances of named entities may have instance identifiers (IDs). Some
+API calls use instance identifiers to create relationships between
+different instances of named entities. Other API calls associate data
+with instances of named entities.
+
+Some named entities must always have instance IDs. In particular, regions
+and frames always have IDs. Task and markers need IDs only if the ID is
+needed in another API call (such as adding a relation or metadata).
+
+The lifetime of instance IDs is distinct from the lifetime of
+instances. This allows various relationships to be specified separate
+from the actual execution of instances. This flexibility comes at the
+expense of extra API calls.
+
+The same ID may not be reused for different instances, unless a previous
+[ref] __itt_id_destroy call for that ID has been issued.
+*/
+
+/** @cond exclude_from_documentation */
+#ifndef ITT_OS_WIN
+#  define ITT_OS_WIN   1
+#endif /* ITT_OS_WIN */
+
+#ifndef ITT_OS_LINUX
+#  define ITT_OS_LINUX 2
+#endif /* ITT_OS_LINUX */
+
+#ifndef ITT_OS_MAC
+#  define ITT_OS_MAC   3
+#endif /* ITT_OS_MAC */
+
+#ifndef ITT_OS_FREEBSD
+#  define ITT_OS_FREEBSD   4
+#endif /* ITT_OS_FREEBSD */
+
+#ifndef ITT_OS
+#  if defined WIN32 || defined _WIN32
+#    define ITT_OS ITT_OS_WIN
+#  elif defined( __APPLE__ ) && defined( __MACH__ )
+#    define ITT_OS ITT_OS_MAC
+#  elif defined( __FreeBSD__ )
+#    define ITT_OS ITT_OS_FREEBSD
+#  else
+#    define ITT_OS ITT_OS_LINUX
+#  endif
+#endif /* ITT_OS */
+
+#ifndef ITT_PLATFORM_WIN
+#  define ITT_PLATFORM_WIN 1
+#endif /* ITT_PLATFORM_WIN */
+
+#ifndef ITT_PLATFORM_POSIX
+#  define ITT_PLATFORM_POSIX 2
+#endif /* ITT_PLATFORM_POSIX */
+
+#ifndef ITT_PLATFORM_MAC
+#  define ITT_PLATFORM_MAC 3
+#endif /* ITT_PLATFORM_MAC */
+
+#ifndef ITT_PLATFORM_FREEBSD
+#  define ITT_PLATFORM_FREEBSD 4
+#endif /* ITT_PLATFORM_FREEBSD */
+
+#ifndef ITT_PLATFORM
+#  if ITT_OS==ITT_OS_WIN
+#    define ITT_PLATFORM ITT_PLATFORM_WIN
+#  elif ITT_OS==ITT_OS_MAC
+#    define ITT_PLATFORM ITT_PLATFORM_MAC
+#  elif ITT_OS==ITT_OS_FREEBSD
+#    define ITT_PLATFORM ITT_PLATFORM_FREEBSD
+#  else
+#    define ITT_PLATFORM ITT_PLATFORM_POSIX
+#  endif
+#endif /* ITT_PLATFORM */
+
+#if defined(_UNICODE) && !defined(UNICODE)
+#define UNICODE
+#endif
+
+#include <stddef.h>
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#include <tchar.h>
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#include <stdint.h>
+#if defined(UNICODE) || defined(_UNICODE)
+#include <wchar.h>
+#endif /* UNICODE || _UNICODE */
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+
+#ifndef ITTAPI_CDECL
+#  if ITT_PLATFORM==ITT_PLATFORM_WIN
+#    define ITTAPI_CDECL __cdecl
+#  else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#    if defined _M_IX86 || defined __i386__
+#      define ITTAPI_CDECL __attribute__ ((cdecl))
+#    else  /* _M_IX86 || __i386__ */
+#      define ITTAPI_CDECL /* actual only on x86 platform */
+#    endif /* _M_IX86 || __i386__ */
+#  endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* ITTAPI_CDECL */
+
+#ifndef STDCALL
+#  if ITT_PLATFORM==ITT_PLATFORM_WIN
+#    define STDCALL __stdcall
+#  else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#    if defined _M_IX86 || defined __i386__
+#      define STDCALL __attribute__ ((stdcall))
+#    else  /* _M_IX86 || __i386__ */
+#      define STDCALL /* supported only on x86 platform */
+#    endif /* _M_IX86 || __i386__ */
+#  endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* STDCALL */
+
+#define ITTAPI    ITTAPI_CDECL
+#define LIBITTAPI ITTAPI_CDECL
+
+/* TODO: Temporary for compatibility! */
+#define ITTAPI_CALL    ITTAPI_CDECL
+#define LIBITTAPI_CALL ITTAPI_CDECL
+
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+/* use __forceinline (VC++ specific) */
+#define ITT_INLINE           __forceinline
+#define ITT_INLINE_ATTRIBUTE /* nothing */
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+/*
+ * Generally, functions are not inlined unless optimization is specified.
+ * For functions declared inline, this attribute inlines the function even
+ * if no optimization level was specified.
+ */
+#ifdef __STRICT_ANSI__
+#define ITT_INLINE           static
+#define ITT_INLINE_ATTRIBUTE __attribute__((unused))
+#else  /* __STRICT_ANSI__ */
+#define ITT_INLINE           static inline
+#define ITT_INLINE_ATTRIBUTE __attribute__((always_inline, unused))
+#endif /* __STRICT_ANSI__ */
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+/** @endcond */
+
+#ifdef INTEL_ITTNOTIFY_ENABLE_LEGACY
+#  if ITT_PLATFORM==ITT_PLATFORM_WIN
+#    pragma message("WARNING!!! Deprecated API is used. Please undefine INTEL_ITTNOTIFY_ENABLE_LEGACY macro")
+#  else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#    warning "Deprecated API is used. Please undefine INTEL_ITTNOTIFY_ENABLE_LEGACY macro"
+#  endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#  include "vtune/legacy/ittnotify.h"
+#endif /* INTEL_ITTNOTIFY_ENABLE_LEGACY */
+
+/** @cond exclude_from_documentation */
+/* Helper macro for joining tokens */
+#define ITT_JOIN_AUX(p,n) p##n
+#define ITT_JOIN(p,n)     ITT_JOIN_AUX(p,n)
+
+#ifdef ITT_MAJOR
+#undef ITT_MAJOR
+#endif
+#ifdef ITT_MINOR
+#undef ITT_MINOR
+#endif
+#define ITT_MAJOR     3
+#define ITT_MINOR     0
+
+/* Standard versioning of a token with major and minor version numbers */
+#define ITT_VERSIONIZE(x)    \
+    ITT_JOIN(x,              \
+    ITT_JOIN(_,              \
+    ITT_JOIN(ITT_MAJOR,      \
+    ITT_JOIN(_, ITT_MINOR))))
+
+#ifndef INTEL_ITTNOTIFY_PREFIX
+#  define INTEL_ITTNOTIFY_PREFIX __itt_
+#endif /* INTEL_ITTNOTIFY_PREFIX */
+#ifndef INTEL_ITTNOTIFY_POSTFIX
+#  define INTEL_ITTNOTIFY_POSTFIX _ptr_
+#endif /* INTEL_ITTNOTIFY_POSTFIX */
+
+#define ITTNOTIFY_NAME_AUX(n) ITT_JOIN(INTEL_ITTNOTIFY_PREFIX,n)
+#define ITTNOTIFY_NAME(n)     ITT_VERSIONIZE(ITTNOTIFY_NAME_AUX(ITT_JOIN(n,INTEL_ITTNOTIFY_POSTFIX)))
+
+#define ITTNOTIFY_VOID(n) (!ITTNOTIFY_NAME(n)) ? (void)0 : ITTNOTIFY_NAME(n)
+#define ITTNOTIFY_DATA(n) (!ITTNOTIFY_NAME(n)) ?       0 : ITTNOTIFY_NAME(n)
+
+#define ITTNOTIFY_VOID_D0(n,d)       (!(d)->flags) ? (void)0 : (!ITTNOTIFY_NAME(n)) ? (void)0 : ITTNOTIFY_NAME(n)(d)
+#define ITTNOTIFY_VOID_D1(n,d,x)     (!(d)->flags) ? (void)0 : (!ITTNOTIFY_NAME(n)) ? (void)0 : ITTNOTIFY_NAME(n)(d,x)
+#define ITTNOTIFY_VOID_D2(n,d,x,y)   (!(d)->flags) ? (void)0 : (!ITTNOTIFY_NAME(n)) ? (void)0 : ITTNOTIFY_NAME(n)(d,x,y)
+#define ITTNOTIFY_VOID_D3(n,d,x,y,z) (!(d)->flags) ? (void)0 : (!ITTNOTIFY_NAME(n)) ? (void)0 : ITTNOTIFY_NAME(n)(d,x,y,z)
+#define ITTNOTIFY_VOID_D4(n,d,x,y,z,a)     (!(d)->flags) ? (void)0 : (!ITTNOTIFY_NAME(n)) ? (void)0 : ITTNOTIFY_NAME(n)(d,x,y,z,a)
+#define ITTNOTIFY_VOID_D5(n,d,x,y,z,a,b)   (!(d)->flags) ? (void)0 : (!ITTNOTIFY_NAME(n)) ? (void)0 : ITTNOTIFY_NAME(n)(d,x,y,z,a,b)
+#define ITTNOTIFY_VOID_D6(n,d,x,y,z,a,b,c) (!(d)->flags) ? (void)0 : (!ITTNOTIFY_NAME(n)) ? (void)0 : ITTNOTIFY_NAME(n)(d,x,y,z,a,b,c)
+#define ITTNOTIFY_DATA_D0(n,d)       (!(d)->flags) ?       0 : (!ITTNOTIFY_NAME(n)) ?       0 : ITTNOTIFY_NAME(n)(d)
+#define ITTNOTIFY_DATA_D1(n,d,x)     (!(d)->flags) ?       0 : (!ITTNOTIFY_NAME(n)) ?       0 : ITTNOTIFY_NAME(n)(d,x)
+#define ITTNOTIFY_DATA_D2(n,d,x,y)   (!(d)->flags) ?       0 : (!ITTNOTIFY_NAME(n)) ?       0 : ITTNOTIFY_NAME(n)(d,x,y)
+#define ITTNOTIFY_DATA_D3(n,d,x,y,z) (!(d)->flags) ?       0 : (!ITTNOTIFY_NAME(n)) ?       0 : ITTNOTIFY_NAME(n)(d,x,y,z)
+#define ITTNOTIFY_DATA_D4(n,d,x,y,z,a)     (!(d)->flags) ? 0 : (!ITTNOTIFY_NAME(n)) ?       0 : ITTNOTIFY_NAME(n)(d,x,y,z,a)
+#define ITTNOTIFY_DATA_D5(n,d,x,y,z,a,b)   (!(d)->flags) ? 0 : (!ITTNOTIFY_NAME(n)) ?       0 : ITTNOTIFY_NAME(n)(d,x,y,z,a,b)
+#define ITTNOTIFY_DATA_D6(n,d,x,y,z,a,b,c) (!(d)->flags) ? 0 : (!ITTNOTIFY_NAME(n)) ?       0 : ITTNOTIFY_NAME(n)(d,x,y,z,a,b,c)
+
+#ifdef ITT_STUB
+#undef ITT_STUB
+#endif
+#ifdef ITT_STUBV
+#undef ITT_STUBV
+#endif
+#define ITT_STUBV(api,type,name,args)                             \
+    typedef type (api* ITT_JOIN(ITTNOTIFY_NAME(name),_t)) args;   \
+    extern ITT_JOIN(ITTNOTIFY_NAME(name),_t) ITTNOTIFY_NAME(name);
+#define ITT_STUB ITT_STUBV
+/** @endcond */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/** @cond exclude_from_gpa_documentation */
+/**
+ * @defgroup public Public API
+ * @{
+ * @}
+ */
+
+/**
+ * @defgroup control Collection Control
+ * @ingroup public
+ * General behavior: application continues to run, but no profiling information is being collected
+ *
+ * Pausing occurs not only for the current thread but for all process as well as spawned processes
+ * - Intel(R) Parallel Inspector and Intel(R) Inspector XE:
+ *   - Does not analyze or report errors that involve memory access.
+ *   - Other errors are reported as usual. Pausing data collection in
+ *     Intel(R) Parallel Inspector and Intel(R) Inspector XE
+ *     only pauses tracing and analyzing memory access.
+ *     It does not pause tracing or analyzing threading APIs.
+ *   .
+ * - Intel(R) Parallel Amplifier and Intel(R) VTune(TM) Amplifier XE:
+ *   - Does continue to record when new threads are started.
+ *   .
+ * - Other effects:
+ *   - Possible reduction of runtime overhead.
+ *   .
+ * @{
+ */
+/** @brief Pause collection */
+void ITTAPI __itt_pause(void);
+/** @brief Resume collection */
+void ITTAPI __itt_resume(void);
+/** @brief Detach collection */
+void ITTAPI __itt_detach(void);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, pause,  (void))
+ITT_STUBV(ITTAPI, void, resume, (void))
+ITT_STUBV(ITTAPI, void, detach, (void))
+#define __itt_pause      ITTNOTIFY_VOID(pause)
+#define __itt_pause_ptr  ITTNOTIFY_NAME(pause)
+#define __itt_resume     ITTNOTIFY_VOID(resume)
+#define __itt_resume_ptr ITTNOTIFY_NAME(resume)
+#define __itt_detach     ITTNOTIFY_VOID(detach)
+#define __itt_detach_ptr ITTNOTIFY_NAME(detach)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_pause()
+#define __itt_pause_ptr  0
+#define __itt_resume()
+#define __itt_resume_ptr 0
+#define __itt_detach()
+#define __itt_detach_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_pause_ptr  0
+#define __itt_resume_ptr 0
+#define __itt_detach_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} control group */
+/** @endcond */
+
+/**
+ * @defgroup threads Threads
+ * @ingroup public
+ * Give names to threads
+ * @{
+ */
+/**
+ * @brief Sets thread name of calling thread
+ * @param[in] name - name of thread
+ */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+void ITTAPI __itt_thread_set_nameA(const char    *name);
+void ITTAPI __itt_thread_set_nameW(const wchar_t *name);
+#if defined(UNICODE) || defined(_UNICODE)
+#  define __itt_thread_set_name     __itt_thread_set_nameW
+#  define __itt_thread_set_name_ptr __itt_thread_set_nameW_ptr
+#else /* UNICODE */
+#  define __itt_thread_set_name     __itt_thread_set_nameA
+#  define __itt_thread_set_name_ptr __itt_thread_set_nameA_ptr
+#endif /* UNICODE */
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+void ITTAPI __itt_thread_set_name(const char *name);
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+ITT_STUBV(ITTAPI, void, thread_set_nameA, (const char    *name))
+ITT_STUBV(ITTAPI, void, thread_set_nameW, (const wchar_t *name))
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+ITT_STUBV(ITTAPI, void, thread_set_name,  (const char    *name))
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_thread_set_nameA     ITTNOTIFY_VOID(thread_set_nameA)
+#define __itt_thread_set_nameA_ptr ITTNOTIFY_NAME(thread_set_nameA)
+#define __itt_thread_set_nameW     ITTNOTIFY_VOID(thread_set_nameW)
+#define __itt_thread_set_nameW_ptr ITTNOTIFY_NAME(thread_set_nameW)
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_thread_set_name     ITTNOTIFY_VOID(thread_set_name)
+#define __itt_thread_set_name_ptr ITTNOTIFY_NAME(thread_set_name)
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_thread_set_nameA(name)
+#define __itt_thread_set_nameA_ptr 0
+#define __itt_thread_set_nameW(name)
+#define __itt_thread_set_nameW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_thread_set_name(name)
+#define __itt_thread_set_name_ptr 0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_thread_set_nameA_ptr 0
+#define __itt_thread_set_nameW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_thread_set_name_ptr 0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/** @cond exclude_from_gpa_documentation */
+
+/**
+ * @brief Mark current thread as ignored from this point on, for the duration of its existence.
+ */
+void ITTAPI __itt_thread_ignore(void);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, thread_ignore, (void))
+#define __itt_thread_ignore     ITTNOTIFY_VOID(thread_ignore)
+#define __itt_thread_ignore_ptr ITTNOTIFY_NAME(thread_ignore)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_thread_ignore()
+#define __itt_thread_ignore_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_thread_ignore_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} threads group */
+
+/**
+ * @defgroup suppress Error suppression
+ * @ingroup public
+ * General behavior: application continues to run, but errors are suppressed
+ *
+ * @{
+ */
+
+/*****************************************************************//**
+ * @name group of functions used for error suppression in correctness tools
+ *********************************************************************/
+/** @{ */
+/**
+ * @hideinitializer
+ * @brief possible value for suppression mask
+ */
+#define __itt_suppress_all_errors 0x7fffffff
+
+/**
+ * @hideinitializer
+ * @brief possible value for suppression mask (suppresses errors from threading analysis)
+ */
+#define __itt_suppress_threading_errors 0x000000ff
+
+/**
+ * @hideinitializer
+ * @brief possible value for suppression mask (suppresses errors from memory analysis)
+ */
+#define __itt_suppress_memory_errors 0x0000ff00
+
+/**
+ * @brief Start suppressing errors identified in mask on this thread
+ */
+void ITTAPI __itt_suppress_push(unsigned int mask);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, suppress_push, (unsigned int mask))
+#define __itt_suppress_push     ITTNOTIFY_VOID(suppress_push)
+#define __itt_suppress_push_ptr ITTNOTIFY_NAME(suppress_push)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_suppress_push(mask)
+#define __itt_suppress_push_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_suppress_push_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Undo the effects of the matching call to __itt_suppress_push
+ */
+void ITTAPI __itt_suppress_pop(void);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, suppress_pop, (void))
+#define __itt_suppress_pop     ITTNOTIFY_VOID(suppress_pop)
+#define __itt_suppress_pop_ptr ITTNOTIFY_NAME(suppress_pop)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_suppress_pop()
+#define __itt_suppress_pop_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_suppress_pop_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @enum __itt_model_disable
+ * @brief Enumerator for the disable methods
+ */
+typedef enum __itt_suppress_mode {
+    __itt_unsuppress_range,
+    __itt_suppress_range
+} __itt_suppress_mode_t;
+
+/**
+ * @brief Mark a range of memory for error suppression or unsuppression for error types included in mask
+ */
+void ITTAPI __itt_suppress_mark_range(__itt_suppress_mode_t mode, unsigned int mask, void * address, size_t size);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, suppress_mark_range, (__itt_suppress_mode_t mode, unsigned int mask, void * address, size_t size))
+#define __itt_suppress_mark_range     ITTNOTIFY_VOID(suppress_mark_range)
+#define __itt_suppress_mark_range_ptr ITTNOTIFY_NAME(suppress_mark_range)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_suppress_mark_range(mask)
+#define __itt_suppress_mark_range_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_suppress_mark_range_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Undo the effect of a matching call to __itt_suppress_mark_range.   If not matching
+ *        call is found, nothing is changed.
+ */
+void ITTAPI __itt_suppress_clear_range(__itt_suppress_mode_t mode, unsigned int mask, void * address, size_t size);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, suppress_clear_range, (__itt_suppress_mode_t mode, unsigned int mask, void * address, size_t size))
+#define __itt_suppress_clear_range     ITTNOTIFY_VOID(suppress_clear_range)
+#define __itt_suppress_clear_range_ptr ITTNOTIFY_NAME(suppress_clear_range)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_suppress_clear_range(mask)
+#define __itt_suppress_clear_range_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_suppress_clear_range_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} */
+/** @} suppress group */
+
+/**
+ * @defgroup sync Synchronization
+ * @ingroup public
+ * Indicate user-written synchronization code
+ * @{
+ */
+/**
+ * @hideinitializer
+ * @brief possible value of attribute argument for sync object type
+ */
+#define __itt_attr_barrier 1
+
+/**
+ * @hideinitializer
+ * @brief possible value of attribute argument for sync object type
+ */
+#define __itt_attr_mutex   2
+
+/**
+@brief Name a synchronization object
+@param[in] addr       Handle for the synchronization object. You should
+use a real address to uniquely identify the synchronization object.
+@param[in] objtype    null-terminated object type string. If NULL is
+passed, the name will be "User Synchronization".
+@param[in] objname    null-terminated object name string. If NULL,
+no name will be assigned to the object.
+@param[in] attribute  one of [#__itt_attr_barrier, #__itt_attr_mutex]
+ */
+
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+void ITTAPI __itt_sync_createA(void *addr, const char    *objtype, const char    *objname, int attribute);
+void ITTAPI __itt_sync_createW(void *addr, const wchar_t *objtype, const wchar_t *objname, int attribute);
+#if defined(UNICODE) || defined(_UNICODE)
+#  define __itt_sync_create     __itt_sync_createW
+#  define __itt_sync_create_ptr __itt_sync_createW_ptr
+#else /* UNICODE */
+#  define __itt_sync_create     __itt_sync_createA
+#  define __itt_sync_create_ptr __itt_sync_createA_ptr
+#endif /* UNICODE */
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+void ITTAPI __itt_sync_create (void *addr, const char *objtype, const char *objname, int attribute);
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+ITT_STUBV(ITTAPI, void, sync_createA, (void *addr, const char    *objtype, const char    *objname, int attribute))
+ITT_STUBV(ITTAPI, void, sync_createW, (void *addr, const wchar_t *objtype, const wchar_t *objname, int attribute))
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+ITT_STUBV(ITTAPI, void, sync_create,  (void *addr, const char*    objtype, const char*    objname, int attribute))
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_sync_createA     ITTNOTIFY_VOID(sync_createA)
+#define __itt_sync_createA_ptr ITTNOTIFY_NAME(sync_createA)
+#define __itt_sync_createW     ITTNOTIFY_VOID(sync_createW)
+#define __itt_sync_createW_ptr ITTNOTIFY_NAME(sync_createW)
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_sync_create     ITTNOTIFY_VOID(sync_create)
+#define __itt_sync_create_ptr ITTNOTIFY_NAME(sync_create)
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_sync_createA(addr, objtype, objname, attribute)
+#define __itt_sync_createA_ptr 0
+#define __itt_sync_createW(addr, objtype, objname, attribute)
+#define __itt_sync_createW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_sync_create(addr, objtype, objname, attribute)
+#define __itt_sync_create_ptr 0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_sync_createA_ptr 0
+#define __itt_sync_createW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_sync_create_ptr 0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+@brief Rename a synchronization object
+
+You can use the rename call to assign or reassign a name to a given
+synchronization object.
+@param[in] addr  handle for the synchronization object.
+@param[in] name  null-terminated object name string.
+*/
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+void ITTAPI __itt_sync_renameA(void *addr, const char    *name);
+void ITTAPI __itt_sync_renameW(void *addr, const wchar_t *name);
+#if defined(UNICODE) || defined(_UNICODE)
+#  define __itt_sync_rename     __itt_sync_renameW
+#  define __itt_sync_rename_ptr __itt_sync_renameW_ptr
+#else /* UNICODE */
+#  define __itt_sync_rename     __itt_sync_renameA
+#  define __itt_sync_rename_ptr __itt_sync_renameA_ptr
+#endif /* UNICODE */
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+void ITTAPI __itt_sync_rename(void *addr, const char *name);
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+ITT_STUBV(ITTAPI, void, sync_renameA, (void *addr, const char    *name))
+ITT_STUBV(ITTAPI, void, sync_renameW, (void *addr, const wchar_t *name))
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+ITT_STUBV(ITTAPI, void, sync_rename,  (void *addr, const char    *name))
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_sync_renameA     ITTNOTIFY_VOID(sync_renameA)
+#define __itt_sync_renameA_ptr ITTNOTIFY_NAME(sync_renameA)
+#define __itt_sync_renameW     ITTNOTIFY_VOID(sync_renameW)
+#define __itt_sync_renameW_ptr ITTNOTIFY_NAME(sync_renameW)
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_sync_rename     ITTNOTIFY_VOID(sync_rename)
+#define __itt_sync_rename_ptr ITTNOTIFY_NAME(sync_rename)
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_sync_renameA(addr, name)
+#define __itt_sync_renameA_ptr 0
+#define __itt_sync_renameW(addr, name)
+#define __itt_sync_renameW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_sync_rename(addr, name)
+#define __itt_sync_rename_ptr 0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_sync_renameA_ptr 0
+#define __itt_sync_renameW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_sync_rename_ptr 0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ @brief Destroy a synchronization object.
+ @param addr Handle for the synchronization object.
+ */
+void ITTAPI __itt_sync_destroy(void *addr);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, sync_destroy, (void *addr))
+#define __itt_sync_destroy     ITTNOTIFY_VOID(sync_destroy)
+#define __itt_sync_destroy_ptr ITTNOTIFY_NAME(sync_destroy)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_sync_destroy(addr)
+#define __itt_sync_destroy_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_sync_destroy_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/*****************************************************************//**
+ * @name group of functions is used for performance measurement tools
+ *********************************************************************/
+/** @{ */
+/**
+ * @brief Enter spin loop on user-defined sync object
+ */
+void ITTAPI __itt_sync_prepare(void* addr);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, sync_prepare, (void *addr))
+#define __itt_sync_prepare     ITTNOTIFY_VOID(sync_prepare)
+#define __itt_sync_prepare_ptr ITTNOTIFY_NAME(sync_prepare)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_sync_prepare(addr)
+#define __itt_sync_prepare_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_sync_prepare_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Quit spin loop without acquiring spin object
+ */
+void ITTAPI __itt_sync_cancel(void *addr);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, sync_cancel, (void *addr))
+#define __itt_sync_cancel     ITTNOTIFY_VOID(sync_cancel)
+#define __itt_sync_cancel_ptr ITTNOTIFY_NAME(sync_cancel)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_sync_cancel(addr)
+#define __itt_sync_cancel_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_sync_cancel_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Successful spin loop completion (sync object acquired)
+ */
+void ITTAPI __itt_sync_acquired(void *addr);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, sync_acquired, (void *addr))
+#define __itt_sync_acquired     ITTNOTIFY_VOID(sync_acquired)
+#define __itt_sync_acquired_ptr ITTNOTIFY_NAME(sync_acquired)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_sync_acquired(addr)
+#define __itt_sync_acquired_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_sync_acquired_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Start sync object releasing code. Is called before the lock release call.
+ */
+void ITTAPI __itt_sync_releasing(void* addr);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, sync_releasing, (void *addr))
+#define __itt_sync_releasing     ITTNOTIFY_VOID(sync_releasing)
+#define __itt_sync_releasing_ptr ITTNOTIFY_NAME(sync_releasing)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_sync_releasing(addr)
+#define __itt_sync_releasing_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_sync_releasing_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} */
+
+/** @} sync group */
+
+/**************************************************************//**
+ * @name group of functions is used for correctness checking tools
+ ******************************************************************/
+/** @{ */
+/**
+ * @ingroup legacy
+ * @deprecated Legacy API
+ * @brief Fast synchronization which does no require spinning.
+ * - This special function is to be used by TBB and OpenMP libraries only when they know
+ *   there is no spin but they need to suppress TC warnings about shared variable modifications.
+ * - It only has corresponding pointers in static library and does not have corresponding function
+ *   in dynamic library.
+ * @see void __itt_sync_prepare(void* addr);
+ */
+void ITTAPI __itt_fsync_prepare(void* addr);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, fsync_prepare, (void *addr))
+#define __itt_fsync_prepare     ITTNOTIFY_VOID(fsync_prepare)
+#define __itt_fsync_prepare_ptr ITTNOTIFY_NAME(fsync_prepare)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_fsync_prepare(addr)
+#define __itt_fsync_prepare_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_fsync_prepare_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @ingroup legacy
+ * @deprecated Legacy API
+ * @brief Fast synchronization which does no require spinning.
+ * - This special function is to be used by TBB and OpenMP libraries only when they know
+ *   there is no spin but they need to suppress TC warnings about shared variable modifications.
+ * - It only has corresponding pointers in static library and does not have corresponding function
+ *   in dynamic library.
+ * @see void __itt_sync_cancel(void *addr);
+ */
+void ITTAPI __itt_fsync_cancel(void *addr);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, fsync_cancel, (void *addr))
+#define __itt_fsync_cancel     ITTNOTIFY_VOID(fsync_cancel)
+#define __itt_fsync_cancel_ptr ITTNOTIFY_NAME(fsync_cancel)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_fsync_cancel(addr)
+#define __itt_fsync_cancel_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_fsync_cancel_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @ingroup legacy
+ * @deprecated Legacy API
+ * @brief Fast synchronization which does no require spinning.
+ * - This special function is to be used by TBB and OpenMP libraries only when they know
+ *   there is no spin but they need to suppress TC warnings about shared variable modifications.
+ * - It only has corresponding pointers in static library and does not have corresponding function
+ *   in dynamic library.
+ * @see void __itt_sync_acquired(void *addr);
+ */
+void ITTAPI __itt_fsync_acquired(void *addr);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, fsync_acquired, (void *addr))
+#define __itt_fsync_acquired     ITTNOTIFY_VOID(fsync_acquired)
+#define __itt_fsync_acquired_ptr ITTNOTIFY_NAME(fsync_acquired)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_fsync_acquired(addr)
+#define __itt_fsync_acquired_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_fsync_acquired_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @ingroup legacy
+ * @deprecated Legacy API
+ * @brief Fast synchronization which does no require spinning.
+ * - This special function is to be used by TBB and OpenMP libraries only when they know
+ *   there is no spin but they need to suppress TC warnings about shared variable modifications.
+ * - It only has corresponding pointers in static library and does not have corresponding function
+ *   in dynamic library.
+ * @see void __itt_sync_releasing(void* addr);
+ */
+void ITTAPI __itt_fsync_releasing(void* addr);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, fsync_releasing, (void *addr))
+#define __itt_fsync_releasing     ITTNOTIFY_VOID(fsync_releasing)
+#define __itt_fsync_releasing_ptr ITTNOTIFY_NAME(fsync_releasing)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_fsync_releasing(addr)
+#define __itt_fsync_releasing_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_fsync_releasing_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} */
+
+/**
+ * @defgroup model Modeling by Intel(R) Parallel Advisor
+ * @ingroup public
+ * This is the subset of itt used for modeling by Intel(R) Parallel Advisor.
+ * This API is called ONLY using annotate.h, by "Annotation" macros
+ * the user places in their sources during the parallelism modeling steps.
+ *
+ * site_begin/end and task_begin/end take the address of handle variables,
+ * which are writeable by the API.  Handles must be 0 initialized prior
+ * to the first call to begin, or may cause a run-time failure.
+ * The handles are initialized in a multi-thread safe way by the API if
+ * the handle is 0.  The commonly expected idiom is one static handle to
+ * identify a site or task.  If a site or task of the same name has already
+ * been started during this collection, the same handle MAY be returned,
+ * but is not required to be - it is unspecified if data merging is done
+ * based on name.  These routines also take an instance variable.  Like
+ * the lexical instance, these must be 0 initialized.  Unlike the lexical
+ * instance, this is used to track a single dynamic instance.
+ *
+ * API used by the Intel(R) Parallel Advisor to describe potential concurrency
+ * and related activities. User-added source annotations expand to calls
+ * to these procedures to enable modeling of a hypothetical concurrent
+ * execution serially.
+ * @{
+ */
+#if !defined(_ADVISOR_ANNOTATE_H_) || defined(ANNOTATE_EXPAND_NULL)
+
+typedef void* __itt_model_site;             /*!< @brief handle for lexical site     */
+typedef void* __itt_model_site_instance;    /*!< @brief handle for dynamic instance */
+typedef void* __itt_model_task;             /*!< @brief handle for lexical site     */
+typedef void* __itt_model_task_instance;    /*!< @brief handle for dynamic instance */
+
+/**
+ * @enum __itt_model_disable
+ * @brief Enumerator for the disable methods
+ */
+typedef enum {
+    __itt_model_disable_observation,
+    __itt_model_disable_collection
+} __itt_model_disable;
+
+#endif /* !_ADVISOR_ANNOTATE_H_ || ANNOTATE_EXPAND_NULL */
+
+/**
+ * @brief ANNOTATE_SITE_BEGIN/ANNOTATE_SITE_END support.
+ *
+ * site_begin/end model a potential concurrency site.
+ * site instances may be recursively nested with themselves.
+ * site_end exits the most recently started but unended site for the current
+ * thread.  The handle passed to end may be used to validate structure.
+ * Instances of a site encountered on different threads concurrently
+ * are considered completely distinct. If the site name for two different
+ * lexical sites match, it is unspecified whether they are treated as the
+ * same or different for data presentation.
+ */
+void ITTAPI __itt_model_site_begin(__itt_model_site *site, __itt_model_site_instance *instance, const char *name);
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+void ITTAPI __itt_model_site_beginW(const wchar_t *name);
+#endif
+void ITTAPI __itt_model_site_beginA(const char *name);
+void ITTAPI __itt_model_site_beginAL(const char *name, size_t siteNameLen);
+void ITTAPI __itt_model_site_end  (__itt_model_site *site, __itt_model_site_instance *instance);
+void ITTAPI __itt_model_site_end_2(void);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, model_site_begin,  (__itt_model_site *site, __itt_model_site_instance *instance, const char *name))
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+ITT_STUBV(ITTAPI, void, model_site_beginW,  (const wchar_t *name))
+#endif
+ITT_STUBV(ITTAPI, void, model_site_beginA,  (const char *name))
+ITT_STUBV(ITTAPI, void, model_site_beginAL,  (const char *name, size_t siteNameLen))
+ITT_STUBV(ITTAPI, void, model_site_end,    (__itt_model_site *site, __itt_model_site_instance *instance))
+ITT_STUBV(ITTAPI, void, model_site_end_2,  (void))
+#define __itt_model_site_begin      ITTNOTIFY_VOID(model_site_begin)
+#define __itt_model_site_begin_ptr  ITTNOTIFY_NAME(model_site_begin)
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_model_site_beginW      ITTNOTIFY_VOID(model_site_beginW)
+#define __itt_model_site_beginW_ptr  ITTNOTIFY_NAME(model_site_beginW)
+#endif
+#define __itt_model_site_beginA      ITTNOTIFY_VOID(model_site_beginA)
+#define __itt_model_site_beginA_ptr  ITTNOTIFY_NAME(model_site_beginA)
+#define __itt_model_site_beginAL      ITTNOTIFY_VOID(model_site_beginAL)
+#define __itt_model_site_beginAL_ptr  ITTNOTIFY_NAME(model_site_beginAL)
+#define __itt_model_site_end        ITTNOTIFY_VOID(model_site_end)
+#define __itt_model_site_end_ptr    ITTNOTIFY_NAME(model_site_end)
+#define __itt_model_site_end_2        ITTNOTIFY_VOID(model_site_end_2)
+#define __itt_model_site_end_2_ptr    ITTNOTIFY_NAME(model_site_end_2)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_model_site_begin(site, instance, name)
+#define __itt_model_site_begin_ptr  0
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_model_site_beginW(name)
+#define __itt_model_site_beginW_ptr  0
+#endif
+#define __itt_model_site_beginA(name)
+#define __itt_model_site_beginA_ptr  0
+#define __itt_model_site_beginAL(name, siteNameLen)
+#define __itt_model_site_beginAL_ptr  0
+#define __itt_model_site_end(site, instance)
+#define __itt_model_site_end_ptr    0
+#define __itt_model_site_end_2()
+#define __itt_model_site_end_2_ptr    0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_model_site_begin_ptr  0
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_model_site_beginW_ptr  0
+#endif
+#define __itt_model_site_beginA_ptr  0
+#define __itt_model_site_beginAL_ptr  0
+#define __itt_model_site_end_ptr    0
+#define __itt_model_site_end_2_ptr    0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief ANNOTATE_TASK_BEGIN/ANNOTATE_TASK_END support
+ *
+ * task_begin/end model a potential task, which is contained within the most
+ * closely enclosing dynamic site.  task_end exits the most recently started
+ * but unended task.  The handle passed to end may be used to validate
+ * structure.  It is unspecified if bad dynamic nesting is detected.  If it
+ * is, it should be encoded in the resulting data collection.  The collector
+ * should not fail due to construct nesting issues, nor attempt to directly
+ * indicate the problem.
+ */
+void ITTAPI __itt_model_task_begin(__itt_model_task *task, __itt_model_task_instance *instance, const char *name);
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+void ITTAPI __itt_model_task_beginW(const wchar_t *name);
+void ITTAPI __itt_model_iteration_taskW(const wchar_t *name);
+#endif
+void ITTAPI __itt_model_task_beginA(const char *name);
+void ITTAPI __itt_model_task_beginAL(const char *name, size_t taskNameLen);
+void ITTAPI __itt_model_iteration_taskA(const char *name);
+void ITTAPI __itt_model_iteration_taskAL(const char *name, size_t taskNameLen);
+void ITTAPI __itt_model_task_end  (__itt_model_task *task, __itt_model_task_instance *instance);
+void ITTAPI __itt_model_task_end_2(void);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, model_task_begin,  (__itt_model_task *task, __itt_model_task_instance *instance, const char *name))
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+ITT_STUBV(ITTAPI, void, model_task_beginW,  (const wchar_t *name))
+ITT_STUBV(ITTAPI, void, model_iteration_taskW, (const wchar_t *name))
+#endif
+ITT_STUBV(ITTAPI, void, model_task_beginA,  (const char *name))
+ITT_STUBV(ITTAPI, void, model_task_beginAL,  (const char *name, size_t taskNameLen))
+ITT_STUBV(ITTAPI, void, model_iteration_taskA,  (const char *name))
+ITT_STUBV(ITTAPI, void, model_iteration_taskAL,  (const char *name, size_t taskNameLen))
+ITT_STUBV(ITTAPI, void, model_task_end,    (__itt_model_task *task, __itt_model_task_instance *instance))
+ITT_STUBV(ITTAPI, void, model_task_end_2,  (void))
+#define __itt_model_task_begin      ITTNOTIFY_VOID(model_task_begin)
+#define __itt_model_task_begin_ptr  ITTNOTIFY_NAME(model_task_begin)
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_model_task_beginW     ITTNOTIFY_VOID(model_task_beginW)
+#define __itt_model_task_beginW_ptr ITTNOTIFY_NAME(model_task_beginW)
+#define __itt_model_iteration_taskW     ITTNOTIFY_VOID(model_iteration_taskW)
+#define __itt_model_iteration_taskW_ptr ITTNOTIFY_NAME(model_iteration_taskW)
+#endif
+#define __itt_model_task_beginA    ITTNOTIFY_VOID(model_task_beginA)
+#define __itt_model_task_beginA_ptr ITTNOTIFY_NAME(model_task_beginA)
+#define __itt_model_task_beginAL    ITTNOTIFY_VOID(model_task_beginAL)
+#define __itt_model_task_beginAL_ptr ITTNOTIFY_NAME(model_task_beginAL)
+#define __itt_model_iteration_taskA    ITTNOTIFY_VOID(model_iteration_taskA)
+#define __itt_model_iteration_taskA_ptr ITTNOTIFY_NAME(model_iteration_taskA)
+#define __itt_model_iteration_taskAL    ITTNOTIFY_VOID(model_iteration_taskAL)
+#define __itt_model_iteration_taskAL_ptr ITTNOTIFY_NAME(model_iteration_taskAL)
+#define __itt_model_task_end        ITTNOTIFY_VOID(model_task_end)
+#define __itt_model_task_end_ptr    ITTNOTIFY_NAME(model_task_end)
+#define __itt_model_task_end_2        ITTNOTIFY_VOID(model_task_end_2)
+#define __itt_model_task_end_2_ptr    ITTNOTIFY_NAME(model_task_end_2)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_model_task_begin(task, instance, name)
+#define __itt_model_task_begin_ptr  0
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_model_task_beginW(name)
+#define __itt_model_task_beginW_ptr  0
+#endif
+#define __itt_model_task_beginA(name)
+#define __itt_model_task_beginA_ptr  0
+#define __itt_model_task_beginAL(name, siteNameLen)
+#define __itt_model_task_beginAL_ptr  0
+#define __itt_model_iteration_taskA(name)
+#define __itt_model_iteration_taskA_ptr  0
+#define __itt_model_iteration_taskAL(name, siteNameLen)
+#define __itt_model_iteration_taskAL_ptr  0
+#define __itt_model_task_end(task, instance)
+#define __itt_model_task_end_ptr    0
+#define __itt_model_task_end_2()
+#define __itt_model_task_end_2_ptr    0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_model_task_begin_ptr  0
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_model_task_beginW_ptr 0
+#endif
+#define __itt_model_task_beginA_ptr  0
+#define __itt_model_task_beginAL_ptr  0
+#define __itt_model_iteration_taskA_ptr    0
+#define __itt_model_iteration_taskAL_ptr    0
+#define __itt_model_task_end_ptr    0
+#define __itt_model_task_end_2_ptr    0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief ANNOTATE_LOCK_ACQUIRE/ANNOTATE_LOCK_RELEASE support
+ *
+ * lock_acquire/release model a potential lock for both lockset and
+ * performance modeling.  Each unique address is modeled as a separate
+ * lock, with invalid addresses being valid lock IDs.  Specifically:
+ * no storage is accessed by the API at the specified address - it is only
+ * used for lock identification.  Lock acquires may be self-nested and are
+ * unlocked by a corresponding number of releases.
+ * (These closely correspond to __itt_sync_acquired/__itt_sync_releasing,
+ * but may not have identical semantics.)
+ */
+void ITTAPI __itt_model_lock_acquire(void *lock);
+void ITTAPI __itt_model_lock_acquire_2(void *lock);
+void ITTAPI __itt_model_lock_release(void *lock);
+void ITTAPI __itt_model_lock_release_2(void *lock);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, model_lock_acquire, (void *lock))
+ITT_STUBV(ITTAPI, void, model_lock_acquire_2, (void *lock))
+ITT_STUBV(ITTAPI, void, model_lock_release, (void *lock))
+ITT_STUBV(ITTAPI, void, model_lock_release_2, (void *lock))
+#define __itt_model_lock_acquire     ITTNOTIFY_VOID(model_lock_acquire)
+#define __itt_model_lock_acquire_ptr ITTNOTIFY_NAME(model_lock_acquire)
+#define __itt_model_lock_acquire_2     ITTNOTIFY_VOID(model_lock_acquire_2)
+#define __itt_model_lock_acquire_2_ptr ITTNOTIFY_NAME(model_lock_acquire_2)
+#define __itt_model_lock_release     ITTNOTIFY_VOID(model_lock_release)
+#define __itt_model_lock_release_ptr ITTNOTIFY_NAME(model_lock_release)
+#define __itt_model_lock_release_2     ITTNOTIFY_VOID(model_lock_release_2)
+#define __itt_model_lock_release_2_ptr ITTNOTIFY_NAME(model_lock_release_2)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_model_lock_acquire(lock)
+#define __itt_model_lock_acquire_ptr 0
+#define __itt_model_lock_acquire_2(lock)
+#define __itt_model_lock_acquire_2_ptr 0
+#define __itt_model_lock_release(lock)
+#define __itt_model_lock_release_ptr 0
+#define __itt_model_lock_release_2(lock)
+#define __itt_model_lock_release_2_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_model_lock_acquire_ptr 0
+#define __itt_model_lock_acquire_2_ptr 0
+#define __itt_model_lock_release_ptr 0
+#define __itt_model_lock_release_2_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief ANNOTATE_RECORD_ALLOCATION/ANNOTATE_RECORD_DEALLOCATION support
+ *
+ * record_allocation/deallocation describe user-defined memory allocator
+ * behavior, which may be required for correctness modeling to understand
+ * when storage is not expected to be actually reused across threads.
+ */
+void ITTAPI __itt_model_record_allocation  (void *addr, size_t size);
+void ITTAPI __itt_model_record_deallocation(void *addr);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, model_record_allocation,   (void *addr, size_t size))
+ITT_STUBV(ITTAPI, void, model_record_deallocation, (void *addr))
+#define __itt_model_record_allocation       ITTNOTIFY_VOID(model_record_allocation)
+#define __itt_model_record_allocation_ptr   ITTNOTIFY_NAME(model_record_allocation)
+#define __itt_model_record_deallocation     ITTNOTIFY_VOID(model_record_deallocation)
+#define __itt_model_record_deallocation_ptr ITTNOTIFY_NAME(model_record_deallocation)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_model_record_allocation(addr, size)
+#define __itt_model_record_allocation_ptr   0
+#define __itt_model_record_deallocation(addr)
+#define __itt_model_record_deallocation_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_model_record_allocation_ptr   0
+#define __itt_model_record_deallocation_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief ANNOTATE_INDUCTION_USES support
+ *
+ * Note particular storage is inductive through the end of the current site
+ */
+void ITTAPI __itt_model_induction_uses(void* addr, size_t size);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, model_induction_uses, (void *addr, size_t size))
+#define __itt_model_induction_uses     ITTNOTIFY_VOID(model_induction_uses)
+#define __itt_model_induction_uses_ptr ITTNOTIFY_NAME(model_induction_uses)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_model_induction_uses(addr, size)
+#define __itt_model_induction_uses_ptr   0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_model_induction_uses_ptr   0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief ANNOTATE_REDUCTION_USES support
+ *
+ * Note particular storage is used for reduction through the end
+ * of the current site
+ */
+void ITTAPI __itt_model_reduction_uses(void* addr, size_t size);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, model_reduction_uses, (void *addr, size_t size))
+#define __itt_model_reduction_uses     ITTNOTIFY_VOID(model_reduction_uses)
+#define __itt_model_reduction_uses_ptr ITTNOTIFY_NAME(model_reduction_uses)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_model_reduction_uses(addr, size)
+#define __itt_model_reduction_uses_ptr   0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_model_reduction_uses_ptr   0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief ANNOTATE_OBSERVE_USES support
+ *
+ * Have correctness modeling record observations about uses of storage
+ * through the end of the current site
+ */
+void ITTAPI __itt_model_observe_uses(void* addr, size_t size);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, model_observe_uses, (void *addr, size_t size))
+#define __itt_model_observe_uses     ITTNOTIFY_VOID(model_observe_uses)
+#define __itt_model_observe_uses_ptr ITTNOTIFY_NAME(model_observe_uses)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_model_observe_uses(addr, size)
+#define __itt_model_observe_uses_ptr   0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_model_observe_uses_ptr   0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief ANNOTATE_CLEAR_USES support
+ *
+ * Clear the special handling of a piece of storage related to induction,
+ * reduction or observe_uses
+ */
+void ITTAPI __itt_model_clear_uses(void* addr);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, model_clear_uses, (void *addr))
+#define __itt_model_clear_uses     ITTNOTIFY_VOID(model_clear_uses)
+#define __itt_model_clear_uses_ptr ITTNOTIFY_NAME(model_clear_uses)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_model_clear_uses(addr)
+#define __itt_model_clear_uses_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_model_clear_uses_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief ANNOTATE_DISABLE_*_PUSH/ANNOTATE_DISABLE_*_POP support
+ *
+ * disable_push/disable_pop push and pop disabling based on a parameter.
+ * Disabling observations stops processing of memory references during
+ * correctness modeling, and all annotations that occur in the disabled
+ * region.  This allows description of code that is expected to be handled
+ * specially during conversion to parallelism or that is not recognized
+ * by tools (e.g. some kinds of synchronization operations.)
+ * This mechanism causes all annotations in the disabled region, other
+ * than disable_push and disable_pop, to be ignored.  (For example, this
+ * might validly be used to disable an entire parallel site and the contained
+ * tasks and locking in it for data collection purposes.)
+ * The disable for collection is a more expensive operation, but reduces
+ * collector overhead significantly.  This applies to BOTH correctness data
+ * collection and performance data collection.  For example, a site
+ * containing a task might only enable data collection for the first 10
+ * iterations.  Both performance and correctness data should reflect this,
+ * and the program should run as close to full speed as possible when
+ * collection is disabled.
+ */
+void ITTAPI __itt_model_disable_push(__itt_model_disable x);
+void ITTAPI __itt_model_disable_pop(void);
+void ITTAPI __itt_model_aggregate_task(size_t x);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, model_disable_push, (__itt_model_disable x))
+ITT_STUBV(ITTAPI, void, model_disable_pop,  (void))
+ITT_STUBV(ITTAPI, void, model_aggregate_task, (size_t x))
+#define __itt_model_disable_push     ITTNOTIFY_VOID(model_disable_push)
+#define __itt_model_disable_push_ptr ITTNOTIFY_NAME(model_disable_push)
+#define __itt_model_disable_pop      ITTNOTIFY_VOID(model_disable_pop)
+#define __itt_model_disable_pop_ptr  ITTNOTIFY_NAME(model_disable_pop)
+#define __itt_model_aggregate_task      ITTNOTIFY_VOID(model_aggregate_task)
+#define __itt_model_aggregate_task_ptr  ITTNOTIFY_NAME(model_aggregate_task)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_model_disable_push(x)
+#define __itt_model_disable_push_ptr 0
+#define __itt_model_disable_pop()
+#define __itt_model_disable_pop_ptr 0
+#define __itt_model_aggregate_task(x)
+#define __itt_model_aggregate_task_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_model_disable_push_ptr 0
+#define __itt_model_disable_pop_ptr 0
+#define __itt_model_aggregate_task_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} model group */
+
+/**
+ * @defgroup heap Heap
+ * @ingroup public
+ * Heap group
+ * @{
+ */
+
+typedef void* __itt_heap_function;
+
+/**
+ * @brief Create an identification for heap function
+ * @return non-zero identifier or NULL
+ */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+__itt_heap_function ITTAPI __itt_heap_function_createA(const char*    name, const char*    domain);
+__itt_heap_function ITTAPI __itt_heap_function_createW(const wchar_t* name, const wchar_t* domain);
+#if defined(UNICODE) || defined(_UNICODE)
+#  define __itt_heap_function_create     __itt_heap_function_createW
+#  define __itt_heap_function_create_ptr __itt_heap_function_createW_ptr
+#else
+#  define __itt_heap_function_create     __itt_heap_function_createA
+#  define __itt_heap_function_create_ptr __itt_heap_function_createA_ptr
+#endif /* UNICODE */
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+__itt_heap_function ITTAPI __itt_heap_function_create(const char* name, const char* domain);
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+ITT_STUB(ITTAPI, __itt_heap_function, heap_function_createA, (const char*    name, const char*    domain))
+ITT_STUB(ITTAPI, __itt_heap_function, heap_function_createW, (const wchar_t* name, const wchar_t* domain))
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+ITT_STUB(ITTAPI, __itt_heap_function, heap_function_create,  (const char*    name, const char*    domain))
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_heap_function_createA     ITTNOTIFY_DATA(heap_function_createA)
+#define __itt_heap_function_createA_ptr ITTNOTIFY_NAME(heap_function_createA)
+#define __itt_heap_function_createW     ITTNOTIFY_DATA(heap_function_createW)
+#define __itt_heap_function_createW_ptr ITTNOTIFY_NAME(heap_function_createW)
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_heap_function_create      ITTNOTIFY_DATA(heap_function_create)
+#define __itt_heap_function_create_ptr  ITTNOTIFY_NAME(heap_function_create)
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_heap_function_createA(name, domain) (__itt_heap_function)0
+#define __itt_heap_function_createA_ptr 0
+#define __itt_heap_function_createW(name, domain) (__itt_heap_function)0
+#define __itt_heap_function_createW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_heap_function_create(name, domain)  (__itt_heap_function)0
+#define __itt_heap_function_create_ptr  0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_heap_function_createA_ptr 0
+#define __itt_heap_function_createW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_heap_function_create_ptr  0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Record an allocation begin occurrence.
+ */
+void ITTAPI __itt_heap_allocate_begin(__itt_heap_function h, size_t size, int initialized);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, heap_allocate_begin, (__itt_heap_function h, size_t size, int initialized))
+#define __itt_heap_allocate_begin     ITTNOTIFY_VOID(heap_allocate_begin)
+#define __itt_heap_allocate_begin_ptr ITTNOTIFY_NAME(heap_allocate_begin)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_heap_allocate_begin(h, size, initialized)
+#define __itt_heap_allocate_begin_ptr   0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_heap_allocate_begin_ptr   0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Record an allocation end occurrence.
+ */
+void ITTAPI __itt_heap_allocate_end(__itt_heap_function h, void** addr, size_t size, int initialized);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, heap_allocate_end, (__itt_heap_function h, void** addr, size_t size, int initialized))
+#define __itt_heap_allocate_end     ITTNOTIFY_VOID(heap_allocate_end)
+#define __itt_heap_allocate_end_ptr ITTNOTIFY_NAME(heap_allocate_end)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_heap_allocate_end(h, addr, size, initialized)
+#define __itt_heap_allocate_end_ptr   0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_heap_allocate_end_ptr   0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Record an free begin occurrence.
+ */
+void ITTAPI __itt_heap_free_begin(__itt_heap_function h, void* addr);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, heap_free_begin, (__itt_heap_function h, void* addr))
+#define __itt_heap_free_begin     ITTNOTIFY_VOID(heap_free_begin)
+#define __itt_heap_free_begin_ptr ITTNOTIFY_NAME(heap_free_begin)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_heap_free_begin(h, addr)
+#define __itt_heap_free_begin_ptr   0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_heap_free_begin_ptr   0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Record an free end occurrence.
+ */
+void ITTAPI __itt_heap_free_end(__itt_heap_function h, void* addr);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, heap_free_end, (__itt_heap_function h, void* addr))
+#define __itt_heap_free_end     ITTNOTIFY_VOID(heap_free_end)
+#define __itt_heap_free_end_ptr ITTNOTIFY_NAME(heap_free_end)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_heap_free_end(h, addr)
+#define __itt_heap_free_end_ptr   0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_heap_free_end_ptr   0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Record an reallocation begin occurrence.
+ */
+void ITTAPI __itt_heap_reallocate_begin(__itt_heap_function h, void* addr, size_t new_size, int initialized);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, heap_reallocate_begin, (__itt_heap_function h, void* addr, size_t new_size, int initialized))
+#define __itt_heap_reallocate_begin     ITTNOTIFY_VOID(heap_reallocate_begin)
+#define __itt_heap_reallocate_begin_ptr ITTNOTIFY_NAME(heap_reallocate_begin)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_heap_reallocate_begin(h, addr, new_size, initialized)
+#define __itt_heap_reallocate_begin_ptr   0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_heap_reallocate_begin_ptr   0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Record an reallocation end occurrence.
+ */
+void ITTAPI __itt_heap_reallocate_end(__itt_heap_function h, void* addr, void** new_addr, size_t new_size, int initialized);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, heap_reallocate_end, (__itt_heap_function h, void* addr, void** new_addr, size_t new_size, int initialized))
+#define __itt_heap_reallocate_end     ITTNOTIFY_VOID(heap_reallocate_end)
+#define __itt_heap_reallocate_end_ptr ITTNOTIFY_NAME(heap_reallocate_end)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_heap_reallocate_end(h, addr, new_addr, new_size, initialized)
+#define __itt_heap_reallocate_end_ptr   0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_heap_reallocate_end_ptr   0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/** @brief internal access begin */
+void ITTAPI __itt_heap_internal_access_begin(void);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, heap_internal_access_begin,  (void))
+#define __itt_heap_internal_access_begin      ITTNOTIFY_VOID(heap_internal_access_begin)
+#define __itt_heap_internal_access_begin_ptr  ITTNOTIFY_NAME(heap_internal_access_begin)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_heap_internal_access_begin()
+#define __itt_heap_internal_access_begin_ptr  0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_heap_internal_access_begin_ptr  0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/** @brief internal access end */
+void ITTAPI __itt_heap_internal_access_end(void);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, heap_internal_access_end, (void))
+#define __itt_heap_internal_access_end     ITTNOTIFY_VOID(heap_internal_access_end)
+#define __itt_heap_internal_access_end_ptr ITTNOTIFY_NAME(heap_internal_access_end)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_heap_internal_access_end()
+#define __itt_heap_internal_access_end_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_heap_internal_access_end_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/** @brief record memory growth begin */
+void ITTAPI __itt_heap_record_memory_growth_begin(void);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, heap_record_memory_growth_begin,  (void))
+#define __itt_heap_record_memory_growth_begin      ITTNOTIFY_VOID(heap_record_memory_growth_begin)
+#define __itt_heap_record_memory_growth_begin_ptr  ITTNOTIFY_NAME(heap_record_memory_growth_begin)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_heap_record_memory_growth_begin()
+#define __itt_heap_record_memory_growth_begin_ptr  0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_heap_record_memory_growth_begin_ptr  0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/** @brief record memory growth end */
+void ITTAPI __itt_heap_record_memory_growth_end(void);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, heap_record_memory_growth_end, (void))
+#define __itt_heap_record_memory_growth_end     ITTNOTIFY_VOID(heap_record_memory_growth_end)
+#define __itt_heap_record_memory_growth_end_ptr ITTNOTIFY_NAME(heap_record_memory_growth_end)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_heap_record_memory_growth_end()
+#define __itt_heap_record_memory_growth_end_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_heap_record_memory_growth_end_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Specify the type of heap detection/reporting to modify.
+ */
+/**
+ * @hideinitializer
+ * @brief Report on memory leaks.
+ */
+#define __itt_heap_leaks 0x00000001
+
+/**
+ * @hideinitializer
+ * @brief Report on memory growth.
+ */
+#define __itt_heap_growth 0x00000002
+
+
+/** @brief heap reset detection */
+void ITTAPI __itt_heap_reset_detection(unsigned int reset_mask);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, heap_reset_detection,  (unsigned int reset_mask))
+#define __itt_heap_reset_detection      ITTNOTIFY_VOID(heap_reset_detection)
+#define __itt_heap_reset_detection_ptr  ITTNOTIFY_NAME(heap_reset_detection)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_heap_reset_detection()
+#define __itt_heap_reset_detection_ptr  0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_heap_reset_detection_ptr  0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/** @brief report */
+void ITTAPI __itt_heap_record(unsigned int record_mask);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, heap_record, (unsigned int record_mask))
+#define __itt_heap_record     ITTNOTIFY_VOID(heap_record)
+#define __itt_heap_record_ptr ITTNOTIFY_NAME(heap_record)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_heap_record()
+#define __itt_heap_record_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_heap_record_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/** @} heap group */
+/** @endcond */
+/* ========================================================================== */
+
+/**
+ * @defgroup domains Domains
+ * @ingroup public
+ * Domains group
+ * @{
+ */
+
+/** @cond exclude_from_documentation */
+#pragma pack(push, 8)
+
+typedef struct ___itt_domain
+{
+    volatile int flags; /*!< Zero if disabled, non-zero if enabled. The meaning of different non-zero values is reserved to the runtime */
+    const char* nameA;  /*!< Copy of original name in ASCII. */
+#if defined(UNICODE) || defined(_UNICODE)
+    const wchar_t* nameW; /*!< Copy of original name in UNICODE. */
+#else  /* UNICODE || _UNICODE */
+    void* nameW;
+#endif /* UNICODE || _UNICODE */
+    int   extra1; /*!< Reserved to the runtime */
+    void* extra2; /*!< Reserved to the runtime */
+    struct ___itt_domain* next;
+} __itt_domain;
+
+#pragma pack(pop)
+/** @endcond */
+
+/**
+ * @ingroup domains
+ * @brief Create a domain.
+ * Create domain using some domain name: the URI naming style is recommended.
+ * Because the set of domains is expected to be static over the application's
+ * execution time, there is no mechanism to destroy a domain.
+ * Any domain can be accessed by any thread in the process, regardless of
+ * which thread created the domain. This call is thread-safe.
+ * @param[in] name name of domain
+ */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+__itt_domain* ITTAPI __itt_domain_createA(const char    *name);
+__itt_domain* ITTAPI __itt_domain_createW(const wchar_t *name);
+#if defined(UNICODE) || defined(_UNICODE)
+#  define __itt_domain_create     __itt_domain_createW
+#  define __itt_domain_create_ptr __itt_domain_createW_ptr
+#else /* UNICODE */
+#  define __itt_domain_create     __itt_domain_createA
+#  define __itt_domain_create_ptr __itt_domain_createA_ptr
+#endif /* UNICODE */
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+__itt_domain* ITTAPI __itt_domain_create(const char *name);
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+ITT_STUB(ITTAPI, __itt_domain*, domain_createA, (const char    *name))
+ITT_STUB(ITTAPI, __itt_domain*, domain_createW, (const wchar_t *name))
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+ITT_STUB(ITTAPI, __itt_domain*, domain_create,  (const char    *name))
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_domain_createA     ITTNOTIFY_DATA(domain_createA)
+#define __itt_domain_createA_ptr ITTNOTIFY_NAME(domain_createA)
+#define __itt_domain_createW     ITTNOTIFY_DATA(domain_createW)
+#define __itt_domain_createW_ptr ITTNOTIFY_NAME(domain_createW)
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_domain_create     ITTNOTIFY_DATA(domain_create)
+#define __itt_domain_create_ptr ITTNOTIFY_NAME(domain_create)
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_domain_createA(name) (__itt_domain*)0
+#define __itt_domain_createA_ptr 0
+#define __itt_domain_createW(name) (__itt_domain*)0
+#define __itt_domain_createW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_domain_create(name)  (__itt_domain*)0
+#define __itt_domain_create_ptr 0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_domain_createA_ptr 0
+#define __itt_domain_createW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_domain_create_ptr  0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} domains group */
+
+/**
+ * @defgroup ids IDs
+ * @ingroup public
+ * IDs group
+ * @{
+ */
+
+/** @cond exclude_from_documentation */
+#pragma pack(push, 8)
+
+typedef struct ___itt_id
+{
+    unsigned long long d1, d2, d3;
+} __itt_id;
+
+#pragma pack(pop)
+/** @endcond */
+
+const __itt_id __itt_null = { 0, 0, 0 };
+
+/**
+ * @ingroup ids
+ * @brief A convenience function is provided to create an ID without domain control.
+ * @brief This is a convenience function to initialize an __itt_id structure. This function
+ * does not affect the collector runtime in any way. After you make the ID with this
+ * function, you still must create it with the __itt_id_create function before using the ID
+ * to identify a named entity.
+ * @param[in] addr The address of object; high QWORD of the ID value.
+ * @param[in] extra The extra data to unique identify object; low QWORD of the ID value.
+ */
+
+ITT_INLINE __itt_id ITTAPI __itt_id_make(void* addr, unsigned long long extra) ITT_INLINE_ATTRIBUTE;
+ITT_INLINE __itt_id ITTAPI __itt_id_make(void* addr, unsigned long long extra)
+{
+    __itt_id id = __itt_null;
+    id.d1 = (unsigned long long)((uintptr_t)addr);
+    id.d2 = (unsigned long long)extra;
+    id.d3 = (unsigned long long)0; /* Reserved. Must be zero */
+    return id;
+}
+
+/**
+ * @ingroup ids
+ * @brief Create an instance of identifier.
+ * This establishes the beginning of the lifetime of an instance of
+ * the given ID in the trace. Once this lifetime starts, the ID
+ * can be used to tag named entity instances in calls such as
+ * __itt_task_begin, and to specify relationships among
+ * identified named entity instances, using the \ref relations APIs.
+ * Instance IDs are not domain specific!
+ * @param[in] domain The domain controlling the execution of this call.
+ * @param[in] id The ID to create.
+ */
+void ITTAPI __itt_id_create(const __itt_domain *domain, __itt_id id);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, id_create, (const __itt_domain *domain, __itt_id id))
+#define __itt_id_create(d,x) ITTNOTIFY_VOID_D1(id_create,d,x)
+#define __itt_id_create_ptr  ITTNOTIFY_NAME(id_create)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_id_create(domain,id)
+#define __itt_id_create_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_id_create_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @ingroup ids
+ * @brief Destroy an instance of identifier.
+ * This ends the lifetime of the current instance of the given ID value in the trace.
+ * Any relationships that are established after this lifetime ends are invalid.
+ * This call must be performed before the given ID value can be reused for a different
+ * named entity instance.
+ * @param[in] domain The domain controlling the execution of this call.
+ * @param[in] id The ID to destroy.
+ */
+void ITTAPI __itt_id_destroy(const __itt_domain *domain, __itt_id id);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, id_destroy, (const __itt_domain *domain, __itt_id id))
+#define __itt_id_destroy(d,x) ITTNOTIFY_VOID_D1(id_destroy,d,x)
+#define __itt_id_destroy_ptr  ITTNOTIFY_NAME(id_destroy)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_id_destroy(domain,id)
+#define __itt_id_destroy_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_id_destroy_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} ids group */
+
+/**
+ * @defgroup handless String Handles
+ * @ingroup public
+ * String Handles group
+ * @{
+ */
+
+/** @cond exclude_from_documentation */
+#pragma pack(push, 8)
+
+typedef struct ___itt_string_handle
+{
+    const char* strA; /*!< Copy of original string in ASCII. */
+#if defined(UNICODE) || defined(_UNICODE)
+    const wchar_t* strW; /*!< Copy of original string in UNICODE. */
+#else  /* UNICODE || _UNICODE */
+    void* strW;
+#endif /* UNICODE || _UNICODE */
+    int   extra1; /*!< Reserved. Must be zero   */
+    void* extra2; /*!< Reserved. Must be zero   */
+    struct ___itt_string_handle* next;
+} __itt_string_handle;
+
+#pragma pack(pop)
+/** @endcond */
+
+/**
+ * @ingroup handles
+ * @brief Create a string handle.
+ * Create and return handle value that can be associated with a string.
+ * Consecutive calls to __itt_string_handle_create with the same name
+ * return the same value. Because the set of string handles is expected to remain
+ * static during the application's execution time, there is no mechanism to destroy a string handle.
+ * Any string handle can be accessed by any thread in the process, regardless of which thread created
+ * the string handle. This call is thread-safe.
+ * @param[in] name The input string
+ */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+__itt_string_handle* ITTAPI __itt_string_handle_createA(const char    *name);
+__itt_string_handle* ITTAPI __itt_string_handle_createW(const wchar_t *name);
+#if defined(UNICODE) || defined(_UNICODE)
+#  define __itt_string_handle_create     __itt_string_handle_createW
+#  define __itt_string_handle_create_ptr __itt_string_handle_createW_ptr
+#else /* UNICODE */
+#  define __itt_string_handle_create     __itt_string_handle_createA
+#  define __itt_string_handle_create_ptr __itt_string_handle_createA_ptr
+#endif /* UNICODE */
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+__itt_string_handle* ITTAPI __itt_string_handle_create(const char *name);
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+ITT_STUB(ITTAPI, __itt_string_handle*, string_handle_createA, (const char    *name))
+ITT_STUB(ITTAPI, __itt_string_handle*, string_handle_createW, (const wchar_t *name))
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+ITT_STUB(ITTAPI, __itt_string_handle*, string_handle_create,  (const char    *name))
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_string_handle_createA     ITTNOTIFY_DATA(string_handle_createA)
+#define __itt_string_handle_createA_ptr ITTNOTIFY_NAME(string_handle_createA)
+#define __itt_string_handle_createW     ITTNOTIFY_DATA(string_handle_createW)
+#define __itt_string_handle_createW_ptr ITTNOTIFY_NAME(string_handle_createW)
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_string_handle_create     ITTNOTIFY_DATA(string_handle_create)
+#define __itt_string_handle_create_ptr ITTNOTIFY_NAME(string_handle_create)
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_string_handle_createA(name) (__itt_string_handle*)0
+#define __itt_string_handle_createA_ptr 0
+#define __itt_string_handle_createW(name) (__itt_string_handle*)0
+#define __itt_string_handle_createW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_string_handle_create(name)  (__itt_string_handle*)0
+#define __itt_string_handle_create_ptr 0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_string_handle_createA_ptr 0
+#define __itt_string_handle_createW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_string_handle_create_ptr  0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} handles group */
+
+/** @cond exclude_from_documentation */
+typedef unsigned long long __itt_timestamp;
+/** @endcond */
+
+#define __itt_timestamp_none ((__itt_timestamp)-1LL)
+
+/** @cond exclude_from_gpa_documentation */
+
+/**
+ * @ingroup timestamps
+ * @brief Return timestamp corresponding to the current moment.
+ * This returns the timestamp in the format that is the most relevant for the current
+ * host or platform (RDTSC, QPC, and others). You can use the "<" operator to
+ * compare __itt_timestamp values.
+ */
+__itt_timestamp ITTAPI __itt_get_timestamp(void);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUB(ITTAPI, __itt_timestamp, get_timestamp, (void))
+#define __itt_get_timestamp      ITTNOTIFY_DATA(get_timestamp)
+#define __itt_get_timestamp_ptr  ITTNOTIFY_NAME(get_timestamp)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_get_timestamp()
+#define __itt_get_timestamp_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_get_timestamp_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} timestamps */
+/** @endcond */
+
+/** @cond exclude_from_gpa_documentation */
+
+/**
+ * @defgroup regions Regions
+ * @ingroup public
+ * Regions group
+ * @{
+ */
+/**
+ * @ingroup regions
+ * @brief Begin of region instance.
+ * Successive calls to __itt_region_begin with the same ID are ignored
+ * until a call to __itt_region_end with the same ID
+ * @param[in] domain The domain for this region instance
+ * @param[in] id The instance ID for this region instance. Must not be __itt_null
+ * @param[in] parentid The instance ID for the parent of this region instance, or __itt_null
+ * @param[in] name The name of this region
+ */
+void ITTAPI __itt_region_begin(const __itt_domain *domain, __itt_id id, __itt_id parentid, __itt_string_handle *name);
+
+/**
+ * @ingroup regions
+ * @brief End of region instance.
+ * The first call to __itt_region_end with a given ID ends the
+ * region. Successive calls with the same ID are ignored, as are
+ * calls that do not have a matching __itt_region_begin call.
+ * @param[in] domain The domain for this region instance
+ * @param[in] id The instance ID for this region instance
+ */
+void ITTAPI __itt_region_end(const __itt_domain *domain, __itt_id id);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, region_begin, (const __itt_domain *domain, __itt_id id, __itt_id parentid, __itt_string_handle *name))
+ITT_STUBV(ITTAPI, void, region_end,   (const __itt_domain *domain, __itt_id id))
+#define __itt_region_begin(d,x,y,z) ITTNOTIFY_VOID_D3(region_begin,d,x,y,z)
+#define __itt_region_begin_ptr      ITTNOTIFY_NAME(region_begin)
+#define __itt_region_end(d,x)       ITTNOTIFY_VOID_D1(region_end,d,x)
+#define __itt_region_end_ptr        ITTNOTIFY_NAME(region_end)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_region_begin(d,x,y,z)
+#define __itt_region_begin_ptr 0
+#define __itt_region_end(d,x)
+#define __itt_region_end_ptr   0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_region_begin_ptr 0
+#define __itt_region_end_ptr   0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} regions group */
+
+/**
+ * @defgroup frames Frames
+ * @ingroup public
+ * Frames are similar to regions, but are intended to be easier to use and to implement.
+ * In particular:
+ * - Frames always represent periods of elapsed time
+ * - By default, frames have no nesting relationships
+ * @{
+ */
+
+/**
+ * @ingroup frames
+ * @brief Begin a frame instance.
+ * Successive calls to __itt_frame_begin with the
+ * same ID are ignored until a call to __itt_frame_end with the same ID.
+ * @param[in] domain The domain for this frame instance
+ * @param[in] id The instance ID for this frame instance or NULL
+ */
+void ITTAPI __itt_frame_begin_v3(const __itt_domain *domain, __itt_id *id);
+
+/**
+ * @ingroup frames
+ * @brief End a frame instance.
+ * The first call to __itt_frame_end with a given ID
+ * ends the frame. Successive calls with the same ID are ignored, as are
+ * calls that do not have a matching __itt_frame_begin call.
+ * @param[in] domain The domain for this frame instance
+ * @param[in] id The instance ID for this frame instance or NULL for current
+ */
+void ITTAPI __itt_frame_end_v3(const __itt_domain *domain, __itt_id *id);
+
+/**
+ * @ingroup frames
+ * @brief Submits a frame instance.
+ * Successive calls to __itt_frame_begin or __itt_frame_submit with the
+ * same ID are ignored until a call to __itt_frame_end or __itt_frame_submit
+ * with the same ID.
+ * Passing special __itt_timestamp_none value as "end" argument means
+ * take the current timestamp as the end timestamp.
+ * @param[in] domain The domain for this frame instance
+ * @param[in] id The instance ID for this frame instance or NULL
+ * @param[in] begin Timestamp of the beginning of the frame
+ * @param[in] end Timestamp of the end of the frame
+ */
+void ITTAPI __itt_frame_submit_v3(const __itt_domain *domain, __itt_id *id,
+    __itt_timestamp begin, __itt_timestamp end);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, frame_begin_v3,  (const __itt_domain *domain, __itt_id *id))
+ITT_STUBV(ITTAPI, void, frame_end_v3,    (const __itt_domain *domain, __itt_id *id))
+ITT_STUBV(ITTAPI, void, frame_submit_v3, (const __itt_domain *domain, __itt_id *id, __itt_timestamp begin, __itt_timestamp end))
+#define __itt_frame_begin_v3(d,x)      ITTNOTIFY_VOID_D1(frame_begin_v3,d,x)
+#define __itt_frame_begin_v3_ptr       ITTNOTIFY_NAME(frame_begin_v3)
+#define __itt_frame_end_v3(d,x)        ITTNOTIFY_VOID_D1(frame_end_v3,d,x)
+#define __itt_frame_end_v3_ptr         ITTNOTIFY_NAME(frame_end_v3)
+#define __itt_frame_submit_v3(d,x,b,e) ITTNOTIFY_VOID_D3(frame_submit_v3,d,x,b,e)
+#define __itt_frame_submit_v3_ptr      ITTNOTIFY_NAME(frame_submit_v3)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_frame_begin_v3(domain,id)
+#define __itt_frame_begin_v3_ptr 0
+#define __itt_frame_end_v3(domain,id)
+#define __itt_frame_end_v3_ptr   0
+#define __itt_frame_submit_v3(domain,id,begin,end)
+#define __itt_frame_submit_v3_ptr   0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_frame_begin_v3_ptr 0
+#define __itt_frame_end_v3_ptr   0
+#define __itt_frame_submit_v3_ptr   0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} frames group */
+/** @endcond */
+
+/**
+ * @defgroup taskgroup Task Group
+ * @ingroup public
+ * Task Group
+ * @{
+ */
+/**
+ * @ingroup task_groups
+ * @brief Denotes a task_group instance.
+ * Successive calls to __itt_task_group with the same ID are ignored.
+ * @param[in] domain The domain for this task_group instance
+ * @param[in] id The instance ID for this task_group instance. Must not be __itt_null.
+ * @param[in] parentid The instance ID for the parent of this task_group instance, or __itt_null.
+ * @param[in] name The name of this task_group
+ */
+void ITTAPI __itt_task_group(const __itt_domain *domain, __itt_id id, __itt_id parentid, __itt_string_handle *name);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, task_group, (const __itt_domain *domain, __itt_id id, __itt_id parentid, __itt_string_handle *name))
+#define __itt_task_group(d,x,y,z) ITTNOTIFY_VOID_D3(task_group,d,x,y,z)
+#define __itt_task_group_ptr      ITTNOTIFY_NAME(task_group)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_task_group(d,x,y,z)
+#define __itt_task_group_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_task_group_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} taskgroup group */
+
+/**
+ * @defgroup tasks Tasks
+ * @ingroup public
+ * A task instance represents a piece of work performed by a particular
+ * thread for a period of time. A call to __itt_task_begin creates a
+ * task instance. This becomes the current instance for that task on that
+ * thread. A following call to __itt_task_end on the same thread ends the
+ * instance. There may be multiple simultaneous instances of tasks with the
+ * same name on different threads. If an ID is specified, the task instance
+ * receives that ID. Nested tasks are allowed.
+ *
+ * Note: The task is defined by the bracketing of __itt_task_begin and
+ * __itt_task_end on the same thread. If some scheduling mechanism causes
+ * task switching (the thread executes a different user task) or task
+ * switching (the user task switches to a different thread) then this breaks
+ * the notion of  current instance. Additional API calls are required to
+ * deal with that possibility.
+ * @{
+ */
+
+/**
+ * @ingroup tasks
+ * @brief Begin a task instance.
+ * @param[in] domain The domain for this task
+ * @param[in] taskid The instance ID for this task instance, or __itt_null
+ * @param[in] parentid The parent instance to which this task instance belongs, or __itt_null
+ * @param[in] name The name of this task
+ */
+void ITTAPI __itt_task_begin(const __itt_domain *domain, __itt_id taskid, __itt_id parentid, __itt_string_handle *name);
+
+/**
+ * @ingroup tasks
+ * @brief Begin a task instance.
+ * @param[in] domain The domain for this task
+ * @param[in] taskid The identifier for this task instance (may be 0)
+ * @param[in] parentid The parent of this task (may be 0)
+ * @param[in] fn The pointer to the function you are tracing
+ */
+void ITTAPI __itt_task_begin_fn(const __itt_domain *domain, __itt_id taskid, __itt_id parentid, void* fn);
+
+/**
+ * @ingroup tasks
+ * @brief End the current task instance.
+ * @param[in] domain The domain for this task
+ */
+void ITTAPI __itt_task_end(const __itt_domain *domain);
+
+/**
+ * @ingroup tasks
+ * @brief Begin an overlapped task instance.
+ * @param[in] domain The domain for this task.
+ * @param[in] taskid The identifier for this task instance, *cannot* be __itt_null.
+ * @param[in] parentid The parent of this task, or __itt_null.
+ * @param[in] name The name of this task.
+ */
+void ITTAPI __itt_task_begin_overlapped(const __itt_domain* domain, __itt_id taskid, __itt_id parentid, __itt_string_handle* name);
+
+/**
+ * @ingroup tasks
+ * @brief End an overlapped task instance.
+ * @param[in] domain The domain for this task
+ * @param[in] taskid Explicit ID of finished task
+ */
+void ITTAPI __itt_task_end_overlapped(const __itt_domain *domain, __itt_id taskid);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, task_begin,    (const __itt_domain *domain, __itt_id id, __itt_id parentid, __itt_string_handle *name))
+ITT_STUBV(ITTAPI, void, task_begin_fn, (const __itt_domain *domain, __itt_id id, __itt_id parentid, void* fn))
+ITT_STUBV(ITTAPI, void, task_end,      (const __itt_domain *domain))
+ITT_STUBV(ITTAPI, void, task_begin_overlapped, (const __itt_domain *domain, __itt_id taskid, __itt_id parentid, __itt_string_handle *name))
+ITT_STUBV(ITTAPI, void, task_end_overlapped,   (const __itt_domain *domain, __itt_id taskid))
+#define __itt_task_begin(d,x,y,z)    ITTNOTIFY_VOID_D3(task_begin,d,x,y,z)
+#define __itt_task_begin_ptr         ITTNOTIFY_NAME(task_begin)
+#define __itt_task_begin_fn(d,x,y,z) ITTNOTIFY_VOID_D3(task_begin_fn,d,x,y,z)
+#define __itt_task_begin_fn_ptr      ITTNOTIFY_NAME(task_begin_fn)
+#define __itt_task_end(d)            ITTNOTIFY_VOID_D0(task_end,d)
+#define __itt_task_end_ptr           ITTNOTIFY_NAME(task_end)
+#define __itt_task_begin_overlapped(d,x,y,z) ITTNOTIFY_VOID_D3(task_begin_overlapped,d,x,y,z)
+#define __itt_task_begin_overlapped_ptr      ITTNOTIFY_NAME(task_begin_overlapped)
+#define __itt_task_end_overlapped(d,x)       ITTNOTIFY_VOID_D1(task_end_overlapped,d,x)
+#define __itt_task_end_overlapped_ptr        ITTNOTIFY_NAME(task_end_overlapped)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_task_begin(domain,id,parentid,name)
+#define __itt_task_begin_ptr    0
+#define __itt_task_begin_fn(domain,id,parentid,fn)
+#define __itt_task_begin_fn_ptr 0
+#define __itt_task_end(domain)
+#define __itt_task_end_ptr      0
+#define __itt_task_begin_overlapped(domain,taskid,parentid,name)
+#define __itt_task_begin_overlapped_ptr         0
+#define __itt_task_end_overlapped(domain,taskid)
+#define __itt_task_end_overlapped_ptr           0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_task_begin_ptr    0
+#define __itt_task_begin_fn_ptr 0
+#define __itt_task_end_ptr      0
+#define __itt_task_begin_overlapped_ptr 0
+#define __itt_task_end_overlapped_ptr   0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} tasks group */
+
+
+/**
+ * @defgroup markers Markers
+ * Markers represent a single discreet event in time. Markers have a scope,
+ * described by an enumerated type __itt_scope. Markers are created by
+ * the API call __itt_marker. A marker instance can be given an ID for use in
+ * adding metadata.
+ * @{
+ */
+
+/**
+ * @brief Describes the scope of an event object in the trace.
+ */
+typedef enum
+{
+    __itt_scope_unknown = 0,
+    __itt_scope_global,
+    __itt_scope_track_group,
+    __itt_scope_track,
+    __itt_scope_task,
+    __itt_scope_marker
+} __itt_scope;
+
+/** @cond exclude_from_documentation */
+#define __itt_marker_scope_unknown  __itt_scope_unknown
+#define __itt_marker_scope_global   __itt_scope_global
+#define __itt_marker_scope_process  __itt_scope_track_group
+#define __itt_marker_scope_thread   __itt_scope_track
+#define __itt_marker_scope_task     __itt_scope_task
+/** @endcond */
+
+/**
+ * @ingroup markers
+ * @brief Create a marker instance
+ * @param[in] domain The domain for this marker
+ * @param[in] id The instance ID for this marker or __itt_null
+ * @param[in] name The name for this marker
+ * @param[in] scope The scope for this marker
+ */
+void ITTAPI __itt_marker(const __itt_domain *domain, __itt_id id, __itt_string_handle *name, __itt_scope scope);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, marker, (const __itt_domain *domain, __itt_id id, __itt_string_handle *name, __itt_scope scope))
+#define __itt_marker(d,x,y,z) ITTNOTIFY_VOID_D3(marker,d,x,y,z)
+#define __itt_marker_ptr      ITTNOTIFY_NAME(marker)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_marker(domain,id,name,scope)
+#define __itt_marker_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_marker_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} markers group */
+
+/**
+ * @defgroup metadata Metadata
+ * The metadata API is used to attach extra information to named
+ * entities. Metadata can be attached to an identified named entity by ID,
+ * or to the current entity (which is always a task).
+ *
+ * Conceptually metadata has a type (what kind of metadata), a key (the
+ * name of the metadata), and a value (the actual data). The encoding of
+ * the value depends on the type of the metadata.
+ *
+ * The type of metadata is specified by an enumerated type __itt_metdata_type.
+ * @{
+ */
+
+/**
+ * @ingroup parameters
+ * @brief describes the type of metadata
+ */
+typedef enum {
+    __itt_metadata_unknown = 0,
+    __itt_metadata_u64,     /**< Unsigned 64-bit integer */
+    __itt_metadata_s64,     /**< Signed 64-bit integer */
+    __itt_metadata_u32,     /**< Unsigned 32-bit integer */
+    __itt_metadata_s32,     /**< Signed 32-bit integer */
+    __itt_metadata_u16,     /**< Unsigned 16-bit integer */
+    __itt_metadata_s16,     /**< Signed 16-bit integer */
+    __itt_metadata_float,   /**< Signed 32-bit floating-point */
+    __itt_metadata_double   /**< SIgned 64-bit floating-point */
+} __itt_metadata_type;
+
+/**
+ * @ingroup parameters
+ * @brief Add metadata to an instance of a named entity.
+ * @param[in] domain The domain controlling the call
+ * @param[in] id The identifier of the instance to which the metadata is to be added, or __itt_null to add to the current task
+ * @param[in] key The name of the metadata
+ * @param[in] type The type of the metadata
+ * @param[in] count The number of elements of the given type. If count == 0, no metadata will be added.
+ * @param[in] data The metadata itself
+*/
+void ITTAPI __itt_metadata_add(const __itt_domain *domain, __itt_id id, __itt_string_handle *key, __itt_metadata_type type, size_t count, void *data);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, metadata_add, (const __itt_domain *domain, __itt_id id, __itt_string_handle *key, __itt_metadata_type type, size_t count, void *data))
+#define __itt_metadata_add(d,x,y,z,a,b) ITTNOTIFY_VOID_D5(metadata_add,d,x,y,z,a,b)
+#define __itt_metadata_add_ptr          ITTNOTIFY_NAME(metadata_add)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_metadata_add(d,x,y,z,a,b)
+#define __itt_metadata_add_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_metadata_add_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @ingroup parameters
+ * @brief Add string metadata to an instance of a named entity.
+ * @param[in] domain The domain controlling the call
+ * @param[in] id The identifier of the instance to which the metadata is to be added, or __itt_null to add to the current task
+ * @param[in] key The name of the metadata
+ * @param[in] data The metadata itself
+ * @param[in] length The number of characters in the string, or -1 if the length is unknown but the string is null-terminated
+*/
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+void ITTAPI __itt_metadata_str_addA(const __itt_domain *domain, __itt_id id, __itt_string_handle *key, const char *data, size_t length);
+void ITTAPI __itt_metadata_str_addW(const __itt_domain *domain, __itt_id id, __itt_string_handle *key, const wchar_t *data, size_t length);
+#if defined(UNICODE) || defined(_UNICODE)
+#  define __itt_metadata_str_add     __itt_metadata_str_addW
+#  define __itt_metadata_str_add_ptr __itt_metadata_str_addW_ptr
+#else /* UNICODE */
+#  define __itt_metadata_str_add     __itt_metadata_str_addA
+#  define __itt_metadata_str_add_ptr __itt_metadata_str_addA_ptr
+#endif /* UNICODE */
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+void ITTAPI __itt_metadata_str_add(const __itt_domain *domain, __itt_id id, __itt_string_handle *key, const char *data, size_t length);
+#endif
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+ITT_STUBV(ITTAPI, void, metadata_str_addA, (const __itt_domain *domain, __itt_id id, __itt_string_handle *key, const char *data, size_t length))
+ITT_STUBV(ITTAPI, void, metadata_str_addW, (const __itt_domain *domain, __itt_id id, __itt_string_handle *key, const wchar_t *data, size_t length))
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+ITT_STUBV(ITTAPI, void, metadata_str_add, (const __itt_domain *domain, __itt_id id, __itt_string_handle *key, const char *data, size_t length))
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_metadata_str_addA(d,x,y,z,a) ITTNOTIFY_VOID_D4(metadata_str_addA,d,x,y,z,a)
+#define __itt_metadata_str_addA_ptr        ITTNOTIFY_NAME(metadata_str_addA)
+#define __itt_metadata_str_addW(d,x,y,z,a) ITTNOTIFY_VOID_D4(metadata_str_addW,d,x,y,z,a)
+#define __itt_metadata_str_addW_ptr        ITTNOTIFY_NAME(metadata_str_addW)
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_metadata_str_add(d,x,y,z,a)  ITTNOTIFY_VOID_D4(metadata_str_add,d,x,y,z,a)
+#define __itt_metadata_str_add_ptr         ITTNOTIFY_NAME(metadata_str_add)
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_metadata_str_addA(d,x,y,z,a)
+#define __itt_metadata_str_addA_ptr 0
+#define __itt_metadata_str_addW(d,x,y,z,a)
+#define __itt_metadata_str_addW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_metadata_str_add(d,x,y,z,a)
+#define __itt_metadata_str_add_ptr 0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_metadata_str_addA_ptr 0
+#define __itt_metadata_str_addW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_metadata_str_add_ptr  0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @ingroup parameters
+ * @brief Add metadata to an instance of a named entity.
+ * @param[in] domain The domain controlling the call
+ * @param[in] scope The scope of the instance to which the metadata is to be added
+
+ * @param[in] id The identifier of the instance to which the metadata is to be added, or __itt_null to add to the current task
+
+ * @param[in] key The name of the metadata
+ * @param[in] type The type of the metadata
+ * @param[in] count The number of elements of the given type. If count == 0, no metadata will be added.
+ * @param[in] data The metadata itself
+*/
+void ITTAPI __itt_metadata_add_with_scope(const __itt_domain *domain, __itt_scope scope, __itt_string_handle *key, __itt_metadata_type type, size_t count, void *data);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, metadata_add_with_scope, (const __itt_domain *domain, __itt_scope scope, __itt_string_handle *key, __itt_metadata_type type, size_t count, void *data))
+#define __itt_metadata_add_with_scope(d,x,y,z,a,b) ITTNOTIFY_VOID_D5(metadata_add_with_scope,d,x,y,z,a,b)
+#define __itt_metadata_add_with_scope_ptr          ITTNOTIFY_NAME(metadata_add_with_scope)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_metadata_add_with_scope(d,x,y,z,a,b)
+#define __itt_metadata_add_with_scope_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_metadata_add_with_scope_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @ingroup parameters
+ * @brief Add string metadata to an instance of a named entity.
+ * @param[in] domain The domain controlling the call
+ * @param[in] scope The scope of the instance to which the metadata is to be added
+
+ * @param[in] id The identifier of the instance to which the metadata is to be added, or __itt_null to add to the current task
+
+ * @param[in] key The name of the metadata
+ * @param[in] data The metadata itself
+ * @param[in] length The number of characters in the string, or -1 if the length is unknown but the string is null-terminated
+*/
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+void ITTAPI __itt_metadata_str_add_with_scopeA(const __itt_domain *domain, __itt_scope scope, __itt_string_handle *key, const char *data, size_t length);
+void ITTAPI __itt_metadata_str_add_with_scopeW(const __itt_domain *domain, __itt_scope scope, __itt_string_handle *key, const wchar_t *data, size_t length);
+#if defined(UNICODE) || defined(_UNICODE)
+#  define __itt_metadata_str_add_with_scope     __itt_metadata_str_add_with_scopeW
+#  define __itt_metadata_str_add_with_scope_ptr __itt_metadata_str_add_with_scopeW_ptr
+#else /* UNICODE */
+#  define __itt_metadata_str_add_with_scope     __itt_metadata_str_add_with_scopeA
+#  define __itt_metadata_str_add_with_scope_ptr __itt_metadata_str_add_with_scopeA_ptr
+#endif /* UNICODE */
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+void ITTAPI __itt_metadata_str_add_with_scope(const __itt_domain *domain, __itt_scope scope, __itt_string_handle *key, const char *data, size_t length);
+#endif
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+ITT_STUBV(ITTAPI, void, metadata_str_add_with_scopeA, (const __itt_domain *domain, __itt_scope scope, __itt_string_handle *key, const char *data, size_t length))
+ITT_STUBV(ITTAPI, void, metadata_str_add_with_scopeW, (const __itt_domain *domain, __itt_scope scope, __itt_string_handle *key, const wchar_t *data, size_t length))
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+ITT_STUBV(ITTAPI, void, metadata_str_add_with_scope, (const __itt_domain *domain, __itt_scope scope, __itt_string_handle *key, const char *data, size_t length))
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_metadata_str_add_with_scopeA(d,x,y,z,a) ITTNOTIFY_VOID_D4(metadata_str_add_with_scopeA,d,x,y,z,a)
+#define __itt_metadata_str_add_with_scopeA_ptr        ITTNOTIFY_NAME(metadata_str_add_with_scopeA)
+#define __itt_metadata_str_add_with_scopeW(d,x,y,z,a) ITTNOTIFY_VOID_D4(metadata_str_add_with_scopeW,d,x,y,z,a)
+#define __itt_metadata_str_add_with_scopeW_ptr        ITTNOTIFY_NAME(metadata_str_add_with_scopeW)
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_metadata_str_add_with_scope(d,x,y,z,a)  ITTNOTIFY_VOID_D4(metadata_str_add_with_scope,d,x,y,z,a)
+#define __itt_metadata_str_add_with_scope_ptr         ITTNOTIFY_NAME(metadata_str_add_with_scope)
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_metadata_str_add_with_scopeA(d,x,y,z,a)
+#define __itt_metadata_str_add_with_scopeA_ptr  0
+#define __itt_metadata_str_add_with_scopeW(d,x,y,z,a)
+#define __itt_metadata_str_add_with_scopeW_ptr  0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_metadata_str_add_with_scope(d,x,y,z,a)
+#define __itt_metadata_str_add_with_scope_ptr   0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_metadata_str_add_with_scopeA_ptr  0
+#define __itt_metadata_str_add_with_scopeW_ptr  0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_metadata_str_add_with_scope_ptr   0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/** @} metadata group */
+
+/**
+ * @defgroup relations Relations
+ * Instances of named entities can be explicitly associated with other
+ * instances using instance IDs and the relationship API calls.
+ *
+ * @{
+ */
+
+/**
+ * @ingroup relations
+ * @brief The kind of relation between two instances is specified by the enumerated type __itt_relation.
+ * Relations between instances can be added with an API call. The relation
+ * API uses instance IDs. Relations can be added before or after the actual
+ * instances are created and persist independently of the instances. This
+ * is the motivation for having different lifetimes for instance IDs and
+ * the actual instances.
+ */
+typedef enum
+{
+    __itt_relation_is_unknown = 0,
+    __itt_relation_is_dependent_on,         /**< "A is dependent on B" means that A cannot start until B completes */
+    __itt_relation_is_sibling_of,           /**< "A is sibling of B" means that A and B were created as a group */
+    __itt_relation_is_parent_of,            /**< "A is parent of B" means that A created B */
+    __itt_relation_is_continuation_of,      /**< "A is continuation of B" means that A assumes the dependencies of B */
+    __itt_relation_is_child_of,             /**< "A is child of B" means that A was created by B (inverse of is_parent_of) */
+    __itt_relation_is_continued_by,         /**< "A is continued by B" means that B assumes the dependencies of A (inverse of is_continuation_of) */
+    __itt_relation_is_predecessor_to        /**< "A is predecessor to B" means that B cannot start until A completes (inverse of is_dependent_on) */
+} __itt_relation;
+
+/**
+ * @ingroup relations
+ * @brief Add a relation to the current task instance.
+ * The current task instance is the head of the relation.
+ * @param[in] domain The domain controlling this call
+ * @param[in] relation The kind of relation
+ * @param[in] tail The ID for the tail of the relation
+ */
+void ITTAPI __itt_relation_add_to_current(const __itt_domain *domain, __itt_relation relation, __itt_id tail);
+
+/**
+ * @ingroup relations
+ * @brief Add a relation between two instance identifiers.
+ * @param[in] domain The domain controlling this call
+ * @param[in] head The ID for the head of the relation
+ * @param[in] relation The kind of relation
+ * @param[in] tail The ID for the tail of the relation
+ */
+void ITTAPI __itt_relation_add(const __itt_domain *domain, __itt_id head, __itt_relation relation, __itt_id tail);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, relation_add_to_current, (const __itt_domain *domain, __itt_relation relation, __itt_id tail))
+ITT_STUBV(ITTAPI, void, relation_add,            (const __itt_domain *domain, __itt_id head, __itt_relation relation, __itt_id tail))
+#define __itt_relation_add_to_current(d,x,y) ITTNOTIFY_VOID_D2(relation_add_to_current,d,x,y)
+#define __itt_relation_add_to_current_ptr    ITTNOTIFY_NAME(relation_add_to_current)
+#define __itt_relation_add(d,x,y,z)          ITTNOTIFY_VOID_D3(relation_add,d,x,y,z)
+#define __itt_relation_add_ptr               ITTNOTIFY_NAME(relation_add)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_relation_add_to_current(d,x,y)
+#define __itt_relation_add_to_current_ptr 0
+#define __itt_relation_add(d,x,y,z)
+#define __itt_relation_add_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_relation_add_to_current_ptr 0
+#define __itt_relation_add_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} relations group */
+
+/** @cond exclude_from_documentation */
+#pragma pack(push, 8)
+
+typedef struct ___itt_clock_info
+{
+    unsigned long long clock_freq; /*!< Clock domain frequency */
+    unsigned long long clock_base; /*!< Clock domain base timestamp */
+} __itt_clock_info;
+
+#pragma pack(pop)
+/** @endcond */
+
+/** @cond exclude_from_documentation */
+typedef void (ITTAPI *__itt_get_clock_info_fn)(__itt_clock_info* clock_info, void* data);
+/** @endcond */
+
+/** @cond exclude_from_documentation */
+#pragma pack(push, 8)
+
+typedef struct ___itt_clock_domain
+{
+    __itt_clock_info info;      /*!< Most recent clock domain info */
+    __itt_get_clock_info_fn fn; /*!< Callback function pointer */
+    void* fn_data;              /*!< Input argument for the callback function */
+    int   extra1;               /*!< Reserved. Must be zero */
+    void* extra2;               /*!< Reserved. Must be zero */
+    struct ___itt_clock_domain* next;
+} __itt_clock_domain;
+
+#pragma pack(pop)
+/** @endcond */
+
+/**
+ * @ingroup clockdomains
+ * @brief Create a clock domain.
+ * Certain applications require the capability to trace their application using
+ * a clock domain different than the CPU, for instance the instrumentation of events
+ * that occur on a GPU.
+ * Because the set of domains is expected to be static over the application's execution time,
+ * there is no mechanism to destroy a domain.
+ * Any domain can be accessed by any thread in the process, regardless of which thread created
+ * the domain. This call is thread-safe.
+ * @param[in] fn A pointer to a callback function which retrieves alternative CPU timestamps
+ * @param[in] fn_data Argument for a callback function; may be NULL
+ */
+__itt_clock_domain* ITTAPI __itt_clock_domain_create(__itt_get_clock_info_fn fn, void* fn_data);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUB(ITTAPI, __itt_clock_domain*, clock_domain_create, (__itt_get_clock_info_fn fn, void* fn_data))
+#define __itt_clock_domain_create     ITTNOTIFY_DATA(clock_domain_create)
+#define __itt_clock_domain_create_ptr ITTNOTIFY_NAME(clock_domain_create)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_clock_domain_create(fn,fn_data) (__itt_clock_domain*)0
+#define __itt_clock_domain_create_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_clock_domain_create_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @ingroup clockdomains
+ * @brief Recalculate clock domains frequences and clock base timestamps.
+ */
+void ITTAPI __itt_clock_domain_reset(void);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, clock_domain_reset, (void))
+#define __itt_clock_domain_reset     ITTNOTIFY_VOID(clock_domain_reset)
+#define __itt_clock_domain_reset_ptr ITTNOTIFY_NAME(clock_domain_reset)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_clock_domain_reset()
+#define __itt_clock_domain_reset_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_clock_domain_reset_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @ingroup clockdomain
+ * @brief Create an instance of identifier. This establishes the beginning of the lifetime of
+ * an instance of the given ID in the trace. Once this lifetime starts, the ID can be used to
+ * tag named entity instances in calls such as __itt_task_begin, and to specify relationships among
+ * identified named entity instances, using the \ref relations APIs.
+ * @param[in] domain The domain controlling the execution of this call.
+ * @param[in] clock_domain The clock domain controlling the execution of this call.
+ * @param[in] timestamp The user defined timestamp.
+ * @param[in] id The ID to create.
+ */
+void ITTAPI __itt_id_create_ex(const __itt_domain* domain, __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_id id);
+
+/**
+ * @ingroup clockdomain
+ * @brief Destroy an instance of identifier. This ends the lifetime of the current instance of the
+ * given ID value in the trace. Any relationships that are established after this lifetime ends are
+ * invalid. This call must be performed before the given ID value can be reused for a different
+ * named entity instance.
+ * @param[in] domain The domain controlling the execution of this call.
+ * @param[in] clock_domain The clock domain controlling the execution of this call.
+ * @param[in] timestamp The user defined timestamp.
+ * @param[in] id The ID to destroy.
+ */
+void ITTAPI __itt_id_destroy_ex(const __itt_domain* domain, __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_id id);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, id_create_ex,  (const __itt_domain *domain, __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_id id))
+ITT_STUBV(ITTAPI, void, id_destroy_ex, (const __itt_domain *domain, __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_id id))
+#define __itt_id_create_ex(d,x,y,z)  ITTNOTIFY_VOID_D3(id_create_ex,d,x,y,z)
+#define __itt_id_create_ex_ptr       ITTNOTIFY_NAME(id_create_ex)
+#define __itt_id_destroy_ex(d,x,y,z) ITTNOTIFY_VOID_D3(id_destroy_ex,d,x,y,z)
+#define __itt_id_destroy_ex_ptr      ITTNOTIFY_NAME(id_destroy_ex)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_id_create_ex(domain,clock_domain,timestamp,id)
+#define __itt_id_create_ex_ptr    0
+#define __itt_id_destroy_ex(domain,clock_domain,timestamp,id)
+#define __itt_id_destroy_ex_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_id_create_ex_ptr    0
+#define __itt_id_destroy_ex_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @ingroup clockdomain
+ * @brief Begin a task instance.
+ * @param[in] domain The domain for this task
+ * @param[in] clock_domain The clock domain controlling the execution of this call.
+ * @param[in] timestamp The user defined timestamp.
+ * @param[in] taskid The instance ID for this task instance, or __itt_null
+ * @param[in] parentid The parent instance to which this task instance belongs, or __itt_null
+ * @param[in] name The name of this task
+ */
+void ITTAPI __itt_task_begin_ex(const __itt_domain* domain, __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_id taskid, __itt_id parentid, __itt_string_handle* name);
+
+/**
+ * @ingroup clockdomain
+ * @brief Begin a task instance.
+ * @param[in] domain The domain for this task
+ * @param[in] clock_domain The clock domain controlling the execution of this call.
+ * @param[in] timestamp The user defined timestamp.
+ * @param[in] taskid The identifier for this task instance, or __itt_null
+ * @param[in] parentid The parent of this task, or __itt_null
+ * @param[in] fn The pointer to the function you are tracing
+ */
+void ITTAPI __itt_task_begin_fn_ex(const __itt_domain* domain, __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_id taskid, __itt_id parentid, void* fn);
+
+/**
+ * @ingroup clockdomain
+ * @brief End the current task instance.
+ * @param[in] domain The domain for this task
+ * @param[in] clock_domain The clock domain controlling the execution of this call.
+ * @param[in] timestamp The user defined timestamp.
+ */
+void ITTAPI __itt_task_end_ex(const __itt_domain* domain, __itt_clock_domain* clock_domain, unsigned long long timestamp);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, task_begin_ex,        (const __itt_domain *domain, __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_id id, __itt_id parentid, __itt_string_handle *name))
+ITT_STUBV(ITTAPI, void, task_begin_fn_ex,     (const __itt_domain *domain, __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_id id, __itt_id parentid, void* fn))
+ITT_STUBV(ITTAPI, void, task_end_ex,          (const __itt_domain *domain, __itt_clock_domain* clock_domain, unsigned long long timestamp))
+#define __itt_task_begin_ex(d,x,y,z,a,b)      ITTNOTIFY_VOID_D5(task_begin_ex,d,x,y,z,a,b)
+#define __itt_task_begin_ex_ptr               ITTNOTIFY_NAME(task_begin_ex)
+#define __itt_task_begin_fn_ex(d,x,y,z,a,b)   ITTNOTIFY_VOID_D5(task_begin_fn_ex,d,x,y,z,a,b)
+#define __itt_task_begin_fn_ex_ptr            ITTNOTIFY_NAME(task_begin_fn_ex)
+#define __itt_task_end_ex(d,x,y)              ITTNOTIFY_VOID_D2(task_end_ex,d,x,y)
+#define __itt_task_end_ex_ptr                 ITTNOTIFY_NAME(task_end_ex)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_task_begin_ex(domain,clock_domain,timestamp,id,parentid,name)
+#define __itt_task_begin_ex_ptr          0
+#define __itt_task_begin_fn_ex(domain,clock_domain,timestamp,id,parentid,fn)
+#define __itt_task_begin_fn_ex_ptr       0
+#define __itt_task_end_ex(domain,clock_domain,timestamp)
+#define __itt_task_end_ex_ptr            0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_task_begin_ex_ptr          0
+#define __itt_task_begin_fn_ex_ptr       0
+#define __itt_task_end_ex_ptr            0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @defgroup counters Counters
+ * @ingroup public
+ * Counters are user-defined objects with a monotonically increasing
+ * value. Counter values are 64-bit unsigned integers.
+ * Counters have names that can be displayed in
+ * the tools.
+ * @{
+ */
+
+/**
+ * @brief opaque structure for counter identification
+ */
+/** @cond exclude_from_documentation */
+
+typedef struct ___itt_counter* __itt_counter;
+
+/**
+ * @brief Create an unsigned 64 bits integer counter with given name/domain
+ *
+ * After __itt_counter_create() is called, __itt_counter_inc(id), __itt_counter_inc_delta(id, delta),
+ * __itt_counter_set_value(id, value_ptr) or __itt_counter_set_value_ex(id, clock_domain, timestamp, value_ptr)
+ * can be used to change the value of the counter, where value_ptr is a pointer to an unsigned 64 bits integer
+ *
+ * The call is equal to __itt_counter_create_typed(name, domain, __itt_metadata_u64)
+ */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+__itt_counter ITTAPI __itt_counter_createA(const char    *name, const char    *domain);
+__itt_counter ITTAPI __itt_counter_createW(const wchar_t *name, const wchar_t *domain);
+#if defined(UNICODE) || defined(_UNICODE)
+#  define __itt_counter_create     __itt_counter_createW
+#  define __itt_counter_create_ptr __itt_counter_createW_ptr
+#else /* UNICODE */
+#  define __itt_counter_create     __itt_counter_createA
+#  define __itt_counter_create_ptr __itt_counter_createA_ptr
+#endif /* UNICODE */
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+__itt_counter ITTAPI __itt_counter_create(const char *name, const char *domain);
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+ITT_STUB(ITTAPI, __itt_counter, counter_createA, (const char    *name, const char    *domain))
+ITT_STUB(ITTAPI, __itt_counter, counter_createW, (const wchar_t *name, const wchar_t *domain))
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+ITT_STUB(ITTAPI, __itt_counter, counter_create,  (const char *name, const char *domain))
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_counter_createA     ITTNOTIFY_DATA(counter_createA)
+#define __itt_counter_createA_ptr ITTNOTIFY_NAME(counter_createA)
+#define __itt_counter_createW     ITTNOTIFY_DATA(counter_createW)
+#define __itt_counter_createW_ptr ITTNOTIFY_NAME(counter_createW)
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_counter_create     ITTNOTIFY_DATA(counter_create)
+#define __itt_counter_create_ptr ITTNOTIFY_NAME(counter_create)
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_counter_createA(name, domain)
+#define __itt_counter_createA_ptr 0
+#define __itt_counter_createW(name, domain)
+#define __itt_counter_createW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_counter_create(name, domain)
+#define __itt_counter_create_ptr  0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_counter_createA_ptr 0
+#define __itt_counter_createW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_counter_create_ptr  0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Increment the unsigned 64 bits integer counter value
+ *
+ * Calling this function to non-unsigned 64 bits integer counters has no effect
+ */
+void ITTAPI __itt_counter_inc(__itt_counter id);
+
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, counter_inc, (__itt_counter id))
+#define __itt_counter_inc     ITTNOTIFY_VOID(counter_inc)
+#define __itt_counter_inc_ptr ITTNOTIFY_NAME(counter_inc)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_counter_inc(id)
+#define __itt_counter_inc_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_counter_inc_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/**
+ * @brief Increment the unsigned 64 bits integer counter value with x
+ *
+ * Calling this function to non-unsigned 64 bits integer counters has no effect
+ */
+void ITTAPI __itt_counter_inc_delta(__itt_counter id, unsigned long long value);
+
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, counter_inc_delta, (__itt_counter id, unsigned long long value))
+#define __itt_counter_inc_delta     ITTNOTIFY_VOID(counter_inc_delta)
+#define __itt_counter_inc_delta_ptr ITTNOTIFY_NAME(counter_inc_delta)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_counter_inc_delta(id, value)
+#define __itt_counter_inc_delta_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_counter_inc_delta_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Decrement the unsigned 64 bits integer counter value
+ *
+ * Calling this function to non-unsigned 64 bits integer counters has no effect
+ */
+void ITTAPI __itt_counter_dec(__itt_counter id);
+
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, counter_dec, (__itt_counter id))
+#define __itt_counter_dec     ITTNOTIFY_VOID(counter_dec)
+#define __itt_counter_dec_ptr ITTNOTIFY_NAME(counter_dec)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_counter_dec(id)
+#define __itt_counter_dec_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_counter_dec_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/**
+ * @brief Decrement the unsigned 64 bits integer counter value with x
+ *
+ * Calling this function to non-unsigned 64 bits integer counters has no effect
+ */
+void ITTAPI __itt_counter_dec_delta(__itt_counter id, unsigned long long value);
+
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, counter_dec_delta, (__itt_counter id, unsigned long long value))
+#define __itt_counter_dec_delta     ITTNOTIFY_VOID(counter_dec_delta)
+#define __itt_counter_dec_delta_ptr ITTNOTIFY_NAME(counter_dec_delta)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_counter_dec_delta(id, value)
+#define __itt_counter_dec_delta_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_counter_dec_delta_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @ingroup counters
+ * @brief Increment a counter by one.
+ * The first call with a given name creates a counter by that name and sets its
+ * value to zero. Successive calls increment the counter value.
+ * @param[in] domain The domain controlling the call. Counter names are not domain specific.
+ *            The domain argument is used only to enable or disable the API calls.
+ * @param[in] name The name of the counter
+ */
+void ITTAPI __itt_counter_inc_v3(const __itt_domain *domain, __itt_string_handle *name);
+
+/**
+ * @ingroup counters
+ * @brief Increment a counter by the value specified in delta.
+ * @param[in] domain The domain controlling the call. Counter names are not domain specific.
+ *            The domain argument is used only to enable or disable the API calls.
+ * @param[in] name The name of the counter
+ * @param[in] delta The amount by which to increment the counter
+ */
+void ITTAPI __itt_counter_inc_delta_v3(const __itt_domain *domain, __itt_string_handle *name, unsigned long long delta);
+
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, counter_inc_v3,       (const __itt_domain *domain, __itt_string_handle *name))
+ITT_STUBV(ITTAPI, void, counter_inc_delta_v3, (const __itt_domain *domain, __itt_string_handle *name, unsigned long long delta))
+#define __itt_counter_inc_v3(d,x)         ITTNOTIFY_VOID_D1(counter_inc_v3,d,x)
+#define __itt_counter_inc_v3_ptr          ITTNOTIFY_NAME(counter_inc_v3)
+#define __itt_counter_inc_delta_v3(d,x,y) ITTNOTIFY_VOID_D2(counter_inc_delta_v3,d,x,y)
+#define __itt_counter_inc_delta_v3_ptr    ITTNOTIFY_NAME(counter_inc_delta_v3)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_counter_inc_v3(domain,name)
+#define __itt_counter_inc_v3_ptr       0
+#define __itt_counter_inc_delta_v3(domain,name,delta)
+#define __itt_counter_inc_delta_v3_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_counter_inc_v3_ptr       0
+#define __itt_counter_inc_delta_v3_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+
+/**
+ * @ingroup counters
+ * @brief Decrement a counter by one.
+ * The first call with a given name creates a counter by that name and sets its
+ * value to zero. Successive calls decrement the counter value.
+ * @param[in] domain The domain controlling the call. Counter names are not domain specific.
+ *            The domain argument is used only to enable or disable the API calls.
+ * @param[in] name The name of the counter
+ */
+void ITTAPI __itt_counter_dec_v3(const __itt_domain *domain, __itt_string_handle *name);
+
+/**
+ * @ingroup counters
+ * @brief Decrement a counter by the value specified in delta.
+ * @param[in] domain The domain controlling the call. Counter names are not domain specific.
+ *            The domain argument is used only to enable or disable the API calls.
+ * @param[in] name The name of the counter
+ * @param[in] delta The amount by which to decrement the counter
+ */
+void ITTAPI __itt_counter_dec_delta_v3(const __itt_domain *domain, __itt_string_handle *name, unsigned long long delta);
+
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, counter_dec_v3,       (const __itt_domain *domain, __itt_string_handle *name))
+ITT_STUBV(ITTAPI, void, counter_dec_delta_v3, (const __itt_domain *domain, __itt_string_handle *name, unsigned long long delta))
+#define __itt_counter_dec_v3(d,x)         ITTNOTIFY_VOID_D1(counter_dec_v3,d,x)
+#define __itt_counter_dec_v3_ptr          ITTNOTIFY_NAME(counter_dec_v3)
+#define __itt_counter_dec_delta_v3(d,x,y) ITTNOTIFY_VOID_D2(counter_dec_delta_v3,d,x,y)
+#define __itt_counter_dec_delta_v3_ptr    ITTNOTIFY_NAME(counter_dec_delta_v3)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_counter_dec_v3(domain,name)
+#define __itt_counter_dec_v3_ptr       0
+#define __itt_counter_dec_delta_v3(domain,name,delta)
+#define __itt_counter_dec_delta_v3_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_counter_dec_v3_ptr       0
+#define __itt_counter_dec_delta_v3_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/** @} counters group */
+
+
+/**
+ * @brief Set the counter value
+ */
+void ITTAPI __itt_counter_set_value(__itt_counter id, void *value_ptr);
+
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, counter_set_value, (__itt_counter id, void *value_ptr))
+#define __itt_counter_set_value     ITTNOTIFY_VOID(counter_set_value)
+#define __itt_counter_set_value_ptr ITTNOTIFY_NAME(counter_set_value)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_counter_set_value(id, value_ptr)
+#define __itt_counter_set_value_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_counter_set_value_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Set the counter value
+ */
+void ITTAPI __itt_counter_set_value_ex(__itt_counter id, __itt_clock_domain *clock_domain, unsigned long long timestamp, void *value_ptr);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, counter_set_value_ex, (__itt_counter id, __itt_clock_domain *clock_domain, unsigned long long timestamp, void *value_ptr))
+#define __itt_counter_set_value_ex     ITTNOTIFY_VOID(counter_set_value_ex)
+#define __itt_counter_set_value_ex_ptr ITTNOTIFY_NAME(counter_set_value_ex)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_counter_set_value_ex(id, clock_domain, timestamp, value_ptr)
+#define __itt_counter_set_value_ex_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_counter_set_value_ex_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Create a typed counter with given name/domain
+ *
+ * After __itt_counter_create_typed() is called, __itt_counter_inc(id), __itt_counter_inc_delta(id, delta),
+ * __itt_counter_set_value(id, value_ptr) or __itt_counter_set_value_ex(id, clock_domain, timestamp, value_ptr)
+ * can be used to change the value of the counter
+ */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+__itt_counter ITTAPI __itt_counter_create_typedA(const char    *name, const char    *domain, __itt_metadata_type type);
+__itt_counter ITTAPI __itt_counter_create_typedW(const wchar_t *name, const wchar_t *domain, __itt_metadata_type type);
+#if defined(UNICODE) || defined(_UNICODE)
+#  define __itt_counter_create_typed     __itt_counter_create_typedW
+#  define __itt_counter_create_typed_ptr __itt_counter_create_typedW_ptr
+#else /* UNICODE */
+#  define __itt_counter_create_typed     __itt_counter_create_typedA
+#  define __itt_counter_create_typed_ptr __itt_counter_create_typedA_ptr
+#endif /* UNICODE */
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+__itt_counter ITTAPI __itt_counter_create_typed(const char *name, const char *domain, __itt_metadata_type type);
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+ITT_STUB(ITTAPI, __itt_counter, counter_create_typedA, (const char    *name, const char    *domain, __itt_metadata_type type))
+ITT_STUB(ITTAPI, __itt_counter, counter_create_typedW, (const wchar_t *name, const wchar_t *domain, __itt_metadata_type type))
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+ITT_STUB(ITTAPI, __itt_counter, counter_create_typed,  (const char *name, const char *domain, __itt_metadata_type type))
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_counter_create_typedA     ITTNOTIFY_DATA(counter_create_typedA)
+#define __itt_counter_create_typedA_ptr ITTNOTIFY_NAME(counter_create_typedA)
+#define __itt_counter_create_typedW     ITTNOTIFY_DATA(counter_create_typedW)
+#define __itt_counter_create_typedW_ptr ITTNOTIFY_NAME(counter_create_typedW)
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_counter_create_typed     ITTNOTIFY_DATA(counter_create_typed)
+#define __itt_counter_create_typed_ptr ITTNOTIFY_NAME(counter_create_typed)
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_counter_create_typedA(name, domain, type)
+#define __itt_counter_create_typedA_ptr 0
+#define __itt_counter_create_typedW(name, domain, type)
+#define __itt_counter_create_typedW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_counter_create_typed(name, domain, type)
+#define __itt_counter_create_typed_ptr  0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_counter_create_typedA_ptr 0
+#define __itt_counter_create_typedW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_counter_create_typed_ptr  0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Destroy the counter identified by the pointer previously returned by __itt_counter_create() or
+ * __itt_counter_create_typed()
+ */
+void ITTAPI __itt_counter_destroy(__itt_counter id);
+
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, counter_destroy, (__itt_counter id))
+#define __itt_counter_destroy     ITTNOTIFY_VOID(counter_destroy)
+#define __itt_counter_destroy_ptr ITTNOTIFY_NAME(counter_destroy)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_counter_destroy(id)
+#define __itt_counter_destroy_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_counter_destroy_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} counters group */
+
+/**
+ * @ingroup markers
+ * @brief Create a marker instance.
+ * @param[in] domain The domain for this marker
+ * @param[in] clock_domain The clock domain controlling the execution of this call.
+ * @param[in] timestamp The user defined timestamp.
+ * @param[in] id The instance ID for this marker, or __itt_null
+ * @param[in] name The name for this marker
+ * @param[in] scope The scope for this marker
+ */
+void ITTAPI __itt_marker_ex(const __itt_domain *domain,  __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_id id, __itt_string_handle *name, __itt_scope scope);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, marker_ex,    (const __itt_domain *domain,  __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_id id, __itt_string_handle *name, __itt_scope scope))
+#define __itt_marker_ex(d,x,y,z,a,b)    ITTNOTIFY_VOID_D5(marker_ex,d,x,y,z,a,b)
+#define __itt_marker_ex_ptr             ITTNOTIFY_NAME(marker_ex)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_marker_ex(domain,clock_domain,timestamp,id,name,scope)
+#define __itt_marker_ex_ptr    0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_marker_ex_ptr    0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @ingroup clockdomain
+ * @brief Add a relation to the current task instance.
+ * The current task instance is the head of the relation.
+ * @param[in] domain The domain controlling this call
+ * @param[in] clock_domain The clock domain controlling the execution of this call.
+ * @param[in] timestamp The user defined timestamp.
+ * @param[in] relation The kind of relation
+ * @param[in] tail The ID for the tail of the relation
+ */
+void ITTAPI __itt_relation_add_to_current_ex(const __itt_domain *domain,  __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_relation relation, __itt_id tail);
+
+/**
+ * @ingroup clockdomain
+ * @brief Add a relation between two instance identifiers.
+ * @param[in] domain The domain controlling this call
+ * @param[in] clock_domain The clock domain controlling the execution of this call.
+ * @param[in] timestamp The user defined timestamp.
+ * @param[in] head The ID for the head of the relation
+ * @param[in] relation The kind of relation
+ * @param[in] tail The ID for the tail of the relation
+ */
+void ITTAPI __itt_relation_add_ex(const __itt_domain *domain,  __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_id head, __itt_relation relation, __itt_id tail);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, relation_add_to_current_ex, (const __itt_domain *domain, __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_relation relation, __itt_id tail))
+ITT_STUBV(ITTAPI, void, relation_add_ex,            (const __itt_domain *domain, __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_id head, __itt_relation relation, __itt_id tail))
+#define __itt_relation_add_to_current_ex(d,x,y,z,a) ITTNOTIFY_VOID_D4(relation_add_to_current_ex,d,x,y,z,a)
+#define __itt_relation_add_to_current_ex_ptr        ITTNOTIFY_NAME(relation_add_to_current_ex)
+#define __itt_relation_add_ex(d,x,y,z,a,b)          ITTNOTIFY_VOID_D5(relation_add_ex,d,x,y,z,a,b)
+#define __itt_relation_add_ex_ptr                   ITTNOTIFY_NAME(relation_add_ex)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_relation_add_to_current_ex(domain,clock_domain,timestame,relation,tail)
+#define __itt_relation_add_to_current_ex_ptr 0
+#define __itt_relation_add_ex(domain,clock_domain,timestamp,head,relation,tail)
+#define __itt_relation_add_ex_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_relation_add_to_current_ex_ptr 0
+#define __itt_relation_add_ex_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/** @cond exclude_from_documentation */
+typedef enum ___itt_track_group_type
+{
+    __itt_track_group_type_normal = 0
+} __itt_track_group_type;
+/** @endcond */
+
+/** @cond exclude_from_documentation */
+#pragma pack(push, 8)
+
+typedef struct ___itt_track_group
+{
+    __itt_string_handle* name;     /*!< Name of the track group */
+    struct ___itt_track* track;    /*!< List of child tracks    */
+    __itt_track_group_type tgtype; /*!< Type of the track group */
+    int   extra1;                  /*!< Reserved. Must be zero  */
+    void* extra2;                  /*!< Reserved. Must be zero  */
+    struct ___itt_track_group* next;
+} __itt_track_group;
+
+#pragma pack(pop)
+/** @endcond */
+
+/**
+ * @brief Placeholder for custom track types. Currently, "normal" custom track
+ * is the only available track type.
+ */
+typedef enum ___itt_track_type
+{
+    __itt_track_type_normal = 0
+#ifdef INTEL_ITTNOTIFY_API_PRIVATE
+    , __itt_track_type_queue
+#endif /* INTEL_ITTNOTIFY_API_PRIVATE */
+} __itt_track_type;
+
+/** @cond exclude_from_documentation */
+#pragma pack(push, 8)
+
+typedef struct ___itt_track
+{
+    __itt_string_handle* name; /*!< Name of the track group */
+    __itt_track_group* group;  /*!< Parent group to a track */
+    __itt_track_type ttype;    /*!< Type of the track       */
+    int   extra1;              /*!< Reserved. Must be zero  */
+    void* extra2;              /*!< Reserved. Must be zero  */
+    struct ___itt_track* next;
+} __itt_track;
+
+#pragma pack(pop)
+/** @endcond */
+
+/**
+ * @brief Create logical track group.
+ */
+__itt_track_group* ITTAPI __itt_track_group_create(__itt_string_handle* name, __itt_track_group_type track_group_type);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUB(ITTAPI, __itt_track_group*, track_group_create, (__itt_string_handle* name, __itt_track_group_type track_group_type))
+#define __itt_track_group_create     ITTNOTIFY_DATA(track_group_create)
+#define __itt_track_group_create_ptr ITTNOTIFY_NAME(track_group_create)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_track_group_create(name)  (__itt_track_group*)0
+#define __itt_track_group_create_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_track_group_create_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Create logical track.
+ */
+__itt_track* ITTAPI __itt_track_create(__itt_track_group* track_group, __itt_string_handle* name, __itt_track_type track_type);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUB(ITTAPI, __itt_track*, track_create, (__itt_track_group* track_group,__itt_string_handle* name, __itt_track_type track_type))
+#define __itt_track_create     ITTNOTIFY_DATA(track_create)
+#define __itt_track_create_ptr ITTNOTIFY_NAME(track_create)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_track_create(track_group,name,track_type)  (__itt_track*)0
+#define __itt_track_create_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_track_create_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Set the logical track.
+ */
+void ITTAPI __itt_set_track(__itt_track* track);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, set_track, (__itt_track *track))
+#define __itt_set_track     ITTNOTIFY_VOID(set_track)
+#define __itt_set_track_ptr ITTNOTIFY_NAME(set_track)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_set_track(track)
+#define __itt_set_track_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_set_track_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/* ========================================================================== */
+/** @cond exclude_from_gpa_documentation */
+/**
+ * @defgroup events Events
+ * @ingroup public
+ * Events group
+ * @{
+ */
+/** @brief user event type */
+typedef int __itt_event;
+
+/**
+ * @brief Create an event notification
+ * @note name or namelen being null/name and namelen not matching, user event feature not enabled
+ * @return non-zero event identifier upon success and __itt_err otherwise
+ */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+__itt_event LIBITTAPI __itt_event_createA(const char    *name, int namelen);
+__itt_event LIBITTAPI __itt_event_createW(const wchar_t *name, int namelen);
+#if defined(UNICODE) || defined(_UNICODE)
+#  define __itt_event_create     __itt_event_createW
+#  define __itt_event_create_ptr __itt_event_createW_ptr
+#else
+#  define __itt_event_create     __itt_event_createA
+#  define __itt_event_create_ptr __itt_event_createA_ptr
+#endif /* UNICODE */
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+__itt_event LIBITTAPI __itt_event_create(const char *name, int namelen);
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+ITT_STUB(LIBITTAPI, __itt_event, event_createA, (const char    *name, int namelen))
+ITT_STUB(LIBITTAPI, __itt_event, event_createW, (const wchar_t *name, int namelen))
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+ITT_STUB(LIBITTAPI, __itt_event, event_create,  (const char    *name, int namelen))
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_event_createA     ITTNOTIFY_DATA(event_createA)
+#define __itt_event_createA_ptr ITTNOTIFY_NAME(event_createA)
+#define __itt_event_createW     ITTNOTIFY_DATA(event_createW)
+#define __itt_event_createW_ptr ITTNOTIFY_NAME(event_createW)
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_event_create      ITTNOTIFY_DATA(event_create)
+#define __itt_event_create_ptr  ITTNOTIFY_NAME(event_create)
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_event_createA(name, namelen) (__itt_event)0
+#define __itt_event_createA_ptr 0
+#define __itt_event_createW(name, namelen) (__itt_event)0
+#define __itt_event_createW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_event_create(name, namelen)  (__itt_event)0
+#define __itt_event_create_ptr  0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_event_createA_ptr 0
+#define __itt_event_createW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_event_create_ptr  0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Record an event occurrence.
+ * @return __itt_err upon failure (invalid event id/user event feature not enabled)
+ */
+int LIBITTAPI __itt_event_start(__itt_event event);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUB(LIBITTAPI, int, event_start, (__itt_event event))
+#define __itt_event_start     ITTNOTIFY_DATA(event_start)
+#define __itt_event_start_ptr ITTNOTIFY_NAME(event_start)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_event_start(event) (int)0
+#define __itt_event_start_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_event_start_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Record an event end occurrence.
+ * @note It is optional if events do not have durations.
+ * @return __itt_err upon failure (invalid event id/user event feature not enabled)
+ */
+int LIBITTAPI __itt_event_end(__itt_event event);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUB(LIBITTAPI, int, event_end, (__itt_event event))
+#define __itt_event_end     ITTNOTIFY_DATA(event_end)
+#define __itt_event_end_ptr ITTNOTIFY_NAME(event_end)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_event_end(event) (int)0
+#define __itt_event_end_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_event_end_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} events group */
+
+
+/**
+ * @defgroup arrays Arrays Visualizer
+ * @ingroup public
+ * Visualize arrays
+ * @{
+ */
+
+/**
+ * @enum __itt_av_data_type
+ * @brief Defines types of arrays data (for C/C++ intrinsic types)
+ */
+typedef enum
+{
+    __itt_e_first = 0,
+    __itt_e_char = 0,  /* 1-byte integer */
+    __itt_e_uchar,     /* 1-byte unsigned integer */
+    __itt_e_int16,     /* 2-byte integer */
+    __itt_e_uint16,    /* 2-byte unsigned integer  */
+    __itt_e_int32,     /* 4-byte integer */
+    __itt_e_uint32,    /* 4-byte unsigned integer */
+    __itt_e_int64,     /* 8-byte integer */
+    __itt_e_uint64,    /* 8-byte unsigned integer */
+    __itt_e_float,     /* 4-byte floating */
+    __itt_e_double,    /* 8-byte floating */
+    __itt_e_last = __itt_e_double
+} __itt_av_data_type;
+
+/**
+ * @brief Save an array data to a file.
+ * Output format is defined by the file extension. The csv and bmp formats are supported (bmp - for 2-dimensional array only).
+ * @param[in] data - pointer to the array data
+ * @param[in] rank - the rank of the array
+ * @param[in] dimensions - pointer to an array of integers, which specifies the array dimensions.
+ * The size of dimensions must be equal to the rank
+ * @param[in] type - the type of the array, specified as one of the __itt_av_data_type values (for intrinsic types)
+ * @param[in] filePath - the file path; the output format is defined by the file extension
+ * @param[in] columnOrder - defines how the array is stored in the linear memory.
+ * It should be 1 for column-major order (e.g. in FORTRAN) or 0 - for row-major order (e.g. in C).
+ */
+
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+int ITTAPI __itt_av_saveA(void *data, int rank, const int *dimensions, int type, const char *filePath, int columnOrder);
+int ITTAPI __itt_av_saveW(void *data, int rank, const int *dimensions, int type, const wchar_t *filePath, int columnOrder);
+#if defined(UNICODE) || defined(_UNICODE)
+#  define __itt_av_save     __itt_av_saveW
+#  define __itt_av_save_ptr __itt_av_saveW_ptr
+#else /* UNICODE */
+#  define __itt_av_save     __itt_av_saveA
+#  define __itt_av_save_ptr __itt_av_saveA_ptr
+#endif /* UNICODE */
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+int ITTAPI __itt_av_save(void *data, int rank, const int *dimensions, int type, const char *filePath, int columnOrder);
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+ITT_STUB(ITTAPI, int, av_saveA, (void *data, int rank, const int *dimensions, int type, const char *filePath, int columnOrder))
+ITT_STUB(ITTAPI, int, av_saveW, (void *data, int rank, const int *dimensions, int type, const wchar_t *filePath, int columnOrder))
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+ITT_STUB(ITTAPI, int, av_save,  (void *data, int rank, const int *dimensions, int type, const char *filePath, int columnOrder))
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_av_saveA     ITTNOTIFY_DATA(av_saveA)
+#define __itt_av_saveA_ptr ITTNOTIFY_NAME(av_saveA)
+#define __itt_av_saveW     ITTNOTIFY_DATA(av_saveW)
+#define __itt_av_saveW_ptr ITTNOTIFY_NAME(av_saveW)
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_av_save     ITTNOTIFY_DATA(av_save)
+#define __itt_av_save_ptr ITTNOTIFY_NAME(av_save)
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_av_saveA(name)
+#define __itt_av_saveA_ptr 0
+#define __itt_av_saveW(name)
+#define __itt_av_saveW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_av_save(name)
+#define __itt_av_save_ptr 0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_av_saveA_ptr 0
+#define __itt_av_saveW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_av_save_ptr 0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+void ITTAPI __itt_enable_attach(void);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, enable_attach, (void))
+#define __itt_enable_attach     ITTNOTIFY_VOID(enable_attach)
+#define __itt_enable_attach_ptr ITTNOTIFY_NAME(enable_attach)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_enable_attach()
+#define __itt_enable_attach_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_enable_attach_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/** @cond exclude_from_gpa_documentation */
+
+/** @} arrays group */
+
+/** @endcond */
+
+/**
+ * @brief Module load info
+ * This API is used to report necessary information in case of module relocation
+ * @param[in] start_addr - relocated module start address
+ * @param[in] end_addr - relocated module end address
+ * @param[in] path - file system path to the module
+ */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+void ITTAPI __itt_module_loadA(void *start_addr, void *end_addr, const char *path);
+void ITTAPI __itt_module_loadW(void *start_addr, void *end_addr, const wchar_t *path);
+#if defined(UNICODE) || defined(_UNICODE)
+#  define __itt_module_load     __itt_module_loadW
+#  define __itt_module_load_ptr __itt_module_loadW_ptr
+#else /* UNICODE */
+#  define __itt_module_load     __itt_module_loadA
+#  define __itt_module_load_ptr __itt_module_loadA_ptr
+#endif /* UNICODE */
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+void ITTAPI __itt_module_load(void *start_addr, void *end_addr, const char *path);
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+ITT_STUB(ITTAPI, void, module_loadA, (void *start_addr, void *end_addr, const char *path))
+ITT_STUB(ITTAPI, void, module_loadW, (void *start_addr, void *end_addr, const wchar_t *path))
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+ITT_STUB(ITTAPI, void, module_load,  (void *start_addr, void *end_addr, const char *path))
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_module_loadA     ITTNOTIFY_VOID(module_loadA)
+#define __itt_module_loadA_ptr ITTNOTIFY_NAME(module_loadA)
+#define __itt_module_loadW     ITTNOTIFY_VOID(module_loadW)
+#define __itt_module_loadW_ptr ITTNOTIFY_NAME(module_loadW)
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_module_load     ITTNOTIFY_VOID(module_load)
+#define __itt_module_load_ptr ITTNOTIFY_NAME(module_load)
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_module_loadA(start_addr, end_addr, path)
+#define __itt_module_loadA_ptr 0
+#define __itt_module_loadW(start_addr, end_addr, path)
+#define __itt_module_loadW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_module_load(start_addr, end_addr, path)
+#define __itt_module_load_ptr 0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_module_loadA_ptr 0
+#define __itt_module_loadW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_module_load_ptr  0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* _ITTNOTIFY_H_ */
+
+#ifdef INTEL_ITTNOTIFY_API_PRIVATE
+
+#ifndef _ITTNOTIFY_PRIVATE_
+#define _ITTNOTIFY_PRIVATE_
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * @ingroup clockdomain
+ * @brief Begin an overlapped task instance.
+ * @param[in] domain The domain for this task
+ * @param[in] clock_domain The clock domain controlling the execution of this call.
+ * @param[in] timestamp The user defined timestamp.
+ * @param[in] taskid The identifier for this task instance, *cannot* be __itt_null.
+ * @param[in] parentid The parent of this task, or __itt_null.
+ * @param[in] name The name of this task.
+ */
+void ITTAPI __itt_task_begin_overlapped_ex(const __itt_domain* domain, __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_id taskid, __itt_id parentid, __itt_string_handle* name);
+
+/**
+ * @ingroup clockdomain
+ * @brief End an overlapped task instance.
+ * @param[in] domain The domain for this task
+ * @param[in] clock_domain The clock domain controlling the execution of this call.
+ * @param[in] timestamp The user defined timestamp.
+ * @param[in] taskid Explicit ID of finished task
+ */
+void ITTAPI __itt_task_end_overlapped_ex(const __itt_domain* domain, __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_id taskid);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, task_begin_overlapped_ex,       (const __itt_domain* domain, __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_id taskid, __itt_id parentid, __itt_string_handle* name))
+ITT_STUBV(ITTAPI, void, task_end_overlapped_ex,         (const __itt_domain* domain, __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_id taskid))
+#define __itt_task_begin_overlapped_ex(d,x,y,z,a,b)     ITTNOTIFY_VOID_D5(task_begin_overlapped_ex,d,x,y,z,a,b)
+#define __itt_task_begin_overlapped_ex_ptr              ITTNOTIFY_NAME(task_begin_overlapped_ex)
+#define __itt_task_end_overlapped_ex(d,x,y,z)           ITTNOTIFY_VOID_D3(task_end_overlapped_ex,d,x,y,z)
+#define __itt_task_end_overlapped_ex_ptr                ITTNOTIFY_NAME(task_end_overlapped_ex)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_task_begin_overlapped_ex(domain,clock_domain,timestamp,taskid,parentid,name)
+#define __itt_task_begin_overlapped_ex_ptr      0
+#define __itt_task_end_overlapped_ex(domain,clock_domain,timestamp,taskid)
+#define __itt_task_end_overlapped_ex_ptr        0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_task_begin_overlapped_ex_ptr      0
+#define __itt_task_end_overlapped_ptr           0
+#define __itt_task_end_overlapped_ex_ptr        0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @defgroup makrs_internal Marks
+ * @ingroup internal
+ * Marks group
+ * @warning Internal API:
+ *   - It is not shipped to outside of Intel
+ *   - It is delivered to internal Intel teams using e-mail or SVN access only
+ * @{
+ */
+/** @brief user mark type */
+typedef int __itt_mark_type;
+
+/**
+ * @brief Creates a user mark type with the specified name using char or Unicode string.
+ * @param[in] name - name of mark to create
+ * @return Returns a handle to the mark type
+ */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+__itt_mark_type ITTAPI __itt_mark_createA(const char    *name);
+__itt_mark_type ITTAPI __itt_mark_createW(const wchar_t *name);
+#if defined(UNICODE) || defined(_UNICODE)
+#  define __itt_mark_create     __itt_mark_createW
+#  define __itt_mark_create_ptr __itt_mark_createW_ptr
+#else /* UNICODE */
+#  define __itt_mark_create     __itt_mark_createA
+#  define __itt_mark_create_ptr __itt_mark_createA_ptr
+#endif /* UNICODE */
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+__itt_mark_type ITTAPI __itt_mark_create(const char *name);
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+ITT_STUB(ITTAPI, __itt_mark_type, mark_createA, (const char    *name))
+ITT_STUB(ITTAPI, __itt_mark_type, mark_createW, (const wchar_t *name))
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+ITT_STUB(ITTAPI, __itt_mark_type, mark_create,  (const char *name))
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_mark_createA     ITTNOTIFY_DATA(mark_createA)
+#define __itt_mark_createA_ptr ITTNOTIFY_NAME(mark_createA)
+#define __itt_mark_createW     ITTNOTIFY_DATA(mark_createW)
+#define __itt_mark_createW_ptr ITTNOTIFY_NAME(mark_createW)
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_mark_create      ITTNOTIFY_DATA(mark_create)
+#define __itt_mark_create_ptr  ITTNOTIFY_NAME(mark_create)
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_mark_createA(name) (__itt_mark_type)0
+#define __itt_mark_createA_ptr 0
+#define __itt_mark_createW(name) (__itt_mark_type)0
+#define __itt_mark_createW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_mark_create(name)  (__itt_mark_type)0
+#define __itt_mark_create_ptr  0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_mark_createA_ptr 0
+#define __itt_mark_createW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_mark_create_ptr  0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Creates a "discrete" user mark type of the specified type and an optional parameter using char or Unicode string.
+ *
+ * - The mark of "discrete" type is placed to collection results in case of success. It appears in overtime view(s) as a special tick sign.
+ * - The call is "synchronous" - function returns after mark is actually added to results.
+ * - This function is useful, for example, to mark different phases of application
+ *   (beginning of the next mark automatically meand end of current region).
+ * - Can be used together with "continuous" marks (see below) at the same collection session
+ * @param[in] mt - mark, created by __itt_mark_create(const char* name) function
+ * @param[in] parameter - string parameter of mark
+ * @return Returns zero value in case of success, non-zero value otherwise.
+ */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+int ITTAPI __itt_markA(__itt_mark_type mt, const char    *parameter);
+int ITTAPI __itt_markW(__itt_mark_type mt, const wchar_t *parameter);
+#if defined(UNICODE) || defined(_UNICODE)
+#  define __itt_mark     __itt_markW
+#  define __itt_mark_ptr __itt_markW_ptr
+#else /* UNICODE  */
+#  define __itt_mark     __itt_markA
+#  define __itt_mark_ptr __itt_markA_ptr
+#endif /* UNICODE */
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+int ITTAPI __itt_mark(__itt_mark_type mt, const char *parameter);
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+ITT_STUB(ITTAPI, int, markA, (__itt_mark_type mt, const char    *parameter))
+ITT_STUB(ITTAPI, int, markW, (__itt_mark_type mt, const wchar_t *parameter))
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+ITT_STUB(ITTAPI, int, mark,  (__itt_mark_type mt, const char *parameter))
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_markA     ITTNOTIFY_DATA(markA)
+#define __itt_markA_ptr ITTNOTIFY_NAME(markA)
+#define __itt_markW     ITTNOTIFY_DATA(markW)
+#define __itt_markW_ptr ITTNOTIFY_NAME(markW)
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_mark      ITTNOTIFY_DATA(mark)
+#define __itt_mark_ptr  ITTNOTIFY_NAME(mark)
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_markA(mt, parameter) (int)0
+#define __itt_markA_ptr 0
+#define __itt_markW(mt, parameter) (int)0
+#define __itt_markW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_mark(mt, parameter)  (int)0
+#define __itt_mark_ptr  0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_markA_ptr 0
+#define __itt_markW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_mark_ptr  0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Use this if necessary to create a "discrete" user event type (mark) for process
+ * rather then for one thread
+ * @see int __itt_mark(__itt_mark_type mt, const char* parameter);
+ */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+int ITTAPI __itt_mark_globalA(__itt_mark_type mt, const char    *parameter);
+int ITTAPI __itt_mark_globalW(__itt_mark_type mt, const wchar_t *parameter);
+#if defined(UNICODE) || defined(_UNICODE)
+#  define __itt_mark_global     __itt_mark_globalW
+#  define __itt_mark_global_ptr __itt_mark_globalW_ptr
+#else /* UNICODE  */
+#  define __itt_mark_global     __itt_mark_globalA
+#  define __itt_mark_global_ptr __itt_mark_globalA_ptr
+#endif /* UNICODE */
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+int ITTAPI __itt_mark_global(__itt_mark_type mt, const char *parameter);
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+ITT_STUB(ITTAPI, int, mark_globalA, (__itt_mark_type mt, const char    *parameter))
+ITT_STUB(ITTAPI, int, mark_globalW, (__itt_mark_type mt, const wchar_t *parameter))
+#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+ITT_STUB(ITTAPI, int, mark_global,  (__itt_mark_type mt, const char *parameter))
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_mark_globalA     ITTNOTIFY_DATA(mark_globalA)
+#define __itt_mark_globalA_ptr ITTNOTIFY_NAME(mark_globalA)
+#define __itt_mark_globalW     ITTNOTIFY_DATA(mark_globalW)
+#define __itt_mark_globalW_ptr ITTNOTIFY_NAME(mark_globalW)
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_mark_global      ITTNOTIFY_DATA(mark_global)
+#define __itt_mark_global_ptr  ITTNOTIFY_NAME(mark_global)
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_mark_globalA(mt, parameter) (int)0
+#define __itt_mark_globalA_ptr 0
+#define __itt_mark_globalW(mt, parameter) (int)0
+#define __itt_mark_globalW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_mark_global(mt, parameter)  (int)0
+#define __itt_mark_global_ptr  0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#if ITT_PLATFORM==ITT_PLATFORM_WIN
+#define __itt_mark_globalA_ptr 0
+#define __itt_mark_globalW_ptr 0
+#else /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#define __itt_mark_global_ptr  0
+#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Creates an "end" point for "continuous" mark with specified name.
+ *
+ * - Returns zero value in case of success, non-zero value otherwise.
+ *   Also returns non-zero value when preceding "begin" point for the
+ *   mark with the same name failed to be created or not created.
+ * - The mark of "continuous" type is placed to collection results in
+ *   case of success. It appears in overtime view(s) as a special tick
+ *   sign (different from "discrete" mark) together with line from
+ *   corresponding "begin" mark to "end" mark.
+ * @note Continuous marks can overlap and be nested inside each other.
+ * Discrete mark can be nested inside marked region
+ * @param[in] mt - mark, created by __itt_mark_create(const char* name) function
+ * @return Returns zero value in case of success, non-zero value otherwise.
+ */
+int ITTAPI __itt_mark_off(__itt_mark_type mt);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUB(ITTAPI, int, mark_off, (__itt_mark_type mt))
+#define __itt_mark_off     ITTNOTIFY_DATA(mark_off)
+#define __itt_mark_off_ptr ITTNOTIFY_NAME(mark_off)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_mark_off(mt) (int)0
+#define __itt_mark_off_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_mark_off_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Use this if necessary to create an "end" point for mark of process
+ * @see int __itt_mark_off(__itt_mark_type mt);
+ */
+int ITTAPI __itt_mark_global_off(__itt_mark_type mt);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUB(ITTAPI, int, mark_global_off, (__itt_mark_type mt))
+#define __itt_mark_global_off     ITTNOTIFY_DATA(mark_global_off)
+#define __itt_mark_global_off_ptr ITTNOTIFY_NAME(mark_global_off)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_mark_global_off(mt) (int)0
+#define __itt_mark_global_off_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_mark_global_off_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+/** @} marks group */
+
+/**
+ * @defgroup counters_internal Counters
+ * @ingroup internal
+ * Counters group
+ * @{
+ */
+
+
+/**
+ * @defgroup stitch Stack Stitching
+ * @ingroup internal
+ * Stack Stitching group
+ * @{
+ */
+/**
+ * @brief opaque structure for counter identification
+ */
+typedef struct ___itt_caller *__itt_caller;
+
+/**
+ * @brief Create the stitch point e.g. a point in call stack where other stacks should be stitched to.
+ * The function returns a unique identifier which is used to match the cut points with corresponding stitch points.
+ */
+__itt_caller ITTAPI __itt_stack_caller_create(void);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUB(ITTAPI, __itt_caller, stack_caller_create, (void))
+#define __itt_stack_caller_create     ITTNOTIFY_DATA(stack_caller_create)
+#define __itt_stack_caller_create_ptr ITTNOTIFY_NAME(stack_caller_create)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_stack_caller_create() (__itt_caller)0
+#define __itt_stack_caller_create_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_stack_caller_create_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Destroy the inforamtion about stitch point identified by the pointer previously returned by __itt_stack_caller_create()
+ */
+void ITTAPI __itt_stack_caller_destroy(__itt_caller id);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, stack_caller_destroy, (__itt_caller id))
+#define __itt_stack_caller_destroy     ITTNOTIFY_VOID(stack_caller_destroy)
+#define __itt_stack_caller_destroy_ptr ITTNOTIFY_NAME(stack_caller_destroy)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_stack_caller_destroy(id)
+#define __itt_stack_caller_destroy_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_stack_caller_destroy_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief Sets the cut point. Stack from each event which occurs after this call will be cut
+ * at the same stack level the function was called and stitched to the corresponding stitch point.
+ */
+void ITTAPI __itt_stack_callee_enter(__itt_caller id);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, stack_callee_enter, (__itt_caller id))
+#define __itt_stack_callee_enter     ITTNOTIFY_VOID(stack_callee_enter)
+#define __itt_stack_callee_enter_ptr ITTNOTIFY_NAME(stack_callee_enter)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_stack_callee_enter(id)
+#define __itt_stack_callee_enter_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_stack_callee_enter_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/**
+ * @brief This function eliminates the cut point which was set by latest __itt_stack_callee_enter().
+ */
+void ITTAPI __itt_stack_callee_leave(__itt_caller id);
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+ITT_STUBV(ITTAPI, void, stack_callee_leave, (__itt_caller id))
+#define __itt_stack_callee_leave     ITTNOTIFY_VOID(stack_callee_leave)
+#define __itt_stack_callee_leave_ptr ITTNOTIFY_NAME(stack_callee_leave)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_stack_callee_leave(id)
+#define __itt_stack_callee_leave_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_stack_callee_leave_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+/** @} stitch group */
+
+/* ***************************************************************************************************************************** */
+
+#include <stdarg.h>
+
+/** @cond exclude_from_documentation */
+typedef enum __itt_error_code
+{
+    __itt_error_success       = 0, /*!< no error */
+    __itt_error_no_module     = 1, /*!< module can't be loaded */
+    /* %1$s -- library name; win: %2$d -- system error code; unx: %2$s -- system error message. */
+    __itt_error_no_symbol     = 2, /*!< symbol not found */
+    /* %1$s -- library name, %2$s -- symbol name. */
+    __itt_error_unknown_group = 3, /*!< unknown group specified */
+    /* %1$s -- env var name, %2$s -- group name. */
+    __itt_error_cant_read_env = 4, /*!< GetEnvironmentVariable() failed */
+    /* %1$s -- env var name, %2$d -- system error. */
+    __itt_error_env_too_long  = 5, /*!< variable value too long */
+    /* %1$s -- env var name, %2$d -- actual length of the var, %3$d -- max allowed length. */
+    __itt_error_system        = 6  /*!< pthread_mutexattr_init or pthread_mutex_init failed */
+    /* %1$s -- function name, %2$d -- errno. */
+} __itt_error_code;
+
+typedef void (__itt_error_handler_t)(__itt_error_code code, va_list);
+__itt_error_handler_t* __itt_set_error_handler(__itt_error_handler_t*);
+
+const char* ITTAPI __itt_api_version(void);
+/** @endcond */
+
+/** @cond exclude_from_documentation */
+#ifndef INTEL_NO_MACRO_BODY
+#ifndef INTEL_NO_ITTNOTIFY_API
+#define __itt_error_handler ITT_JOIN(INTEL_ITTNOTIFY_PREFIX, error_handler)
+void __itt_error_handler(__itt_error_code code, va_list args);
+extern const int ITTNOTIFY_NAME(err);
+#define __itt_err ITTNOTIFY_NAME(err)
+ITT_STUB(ITTAPI, const char*, api_version, (void))
+#define __itt_api_version     ITTNOTIFY_DATA(api_version)
+#define __itt_api_version_ptr ITTNOTIFY_NAME(api_version)
+#else  /* INTEL_NO_ITTNOTIFY_API */
+#define __itt_api_version()   (const char*)0
+#define __itt_api_version_ptr 0
+#endif /* INTEL_NO_ITTNOTIFY_API */
+#else  /* INTEL_NO_MACRO_BODY */
+#define __itt_api_version_ptr 0
+#endif /* INTEL_NO_MACRO_BODY */
+/** @endcond */
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* _ITTNOTIFY_PRIVATE_ */
+
+#endif /* INTEL_ITTNOTIFY_API_PRIVATE */
+
+// clang-format on