Adding upstream version 115.8.0esr.upstream/115.8.0esr

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

1 files changed, 1729 insertions, 0 deletions

diff --git a/mozglue/misc/NativeNt.h b/mozglue/misc/NativeNt.h
new file mode 100644
index 0000000000..439ef3d12a
--- /dev/null
+++ b/mozglue/misc/NativeNt.h
@@ -0,0 +1,1729 @@
+/* -*- 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 https://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_NativeNt_h
+#define mozilla_NativeNt_h
+
+#include <stdint.h>
+#include <windows.h>
+#include <winnt.h>
+#include <winternl.h>
+
+#include <algorithm>
+#include <utility>
+
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/DebugOnly.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/Range.h"
+#include "mozilla/Span.h"
+#include "mozilla/WinHeaderOnlyUtils.h"
+#include "mozilla/interceptor/MMPolicies.h"
+#include "mozilla/interceptor/TargetFunction.h"
+
+#if defined(MOZILLA_INTERNAL_API)
+#  include "nsString.h"
+#endif  // defined(MOZILLA_INTERNAL_API)
+
+// The declarations within this #if block are intended to be used for initial
+// process initialization ONLY. You probably don't want to be using these in
+// normal Gecko code!
+#if !defined(MOZILLA_INTERNAL_API)
+
+extern "C" {
+
+#  if !defined(STATUS_ACCESS_DENIED)
+#    define STATUS_ACCESS_DENIED ((NTSTATUS)0xC0000022L)
+#  endif  // !defined(STATUS_ACCESS_DENIED)
+
+#  if !defined(STATUS_DLL_NOT_FOUND)
+#    define STATUS_DLL_NOT_FOUND ((NTSTATUS)0xC0000135L)
+#  endif  // !defined(STATUS_DLL_NOT_FOUND)
+
+#  if !defined(STATUS_UNSUCCESSFUL)
+#    define STATUS_UNSUCCESSFUL ((NTSTATUS)0xC0000001L)
+#  endif  // !defined(STATUS_UNSUCCESSFUL)
+
+#  if !defined(STATUS_INFO_LENGTH_MISMATCH)
+#    define STATUS_INFO_LENGTH_MISMATCH ((NTSTATUS)0xC0000004L)
+#  endif
+
+enum SECTION_INHERIT { ViewShare = 1, ViewUnmap = 2 };
+
+NTSTATUS NTAPI NtMapViewOfSection(
+    HANDLE aSection, HANDLE aProcess, PVOID* aBaseAddress, ULONG_PTR aZeroBits,
+    SIZE_T aCommitSize, PLARGE_INTEGER aSectionOffset, PSIZE_T aViewSize,
+    SECTION_INHERIT aInheritDisposition, ULONG aAllocationType,
+    ULONG aProtectionFlags);
+
+NTSTATUS NTAPI NtUnmapViewOfSection(HANDLE aProcess, PVOID aBaseAddress);
+
+enum MEMORY_INFORMATION_CLASS {
+  MemoryBasicInformation = 0,
+  MemorySectionName = 2
+};
+
+// NB: When allocating, space for the buffer must also be included
+typedef struct _MEMORY_SECTION_NAME {
+  UNICODE_STRING mSectionFileName;
+} MEMORY_SECTION_NAME, *PMEMORY_SECTION_NAME;
+
+NTSTATUS NTAPI NtQueryVirtualMemory(HANDLE aProcess, PVOID aBaseAddress,
+                                    MEMORY_INFORMATION_CLASS aMemInfoClass,
+                                    PVOID aMemInfo, SIZE_T aMemInfoLen,
+                                    PSIZE_T aReturnLen);
+
+LONG NTAPI RtlCompareUnicodeString(PCUNICODE_STRING aStr1,
+                                   PCUNICODE_STRING aStr2,
+                                   BOOLEAN aCaseInsensitive);
+
+BOOLEAN NTAPI RtlEqualUnicodeString(PCUNICODE_STRING aStr1,
+                                    PCUNICODE_STRING aStr2,
+                                    BOOLEAN aCaseInsensitive);
+
+NTSTATUS NTAPI RtlGetVersion(PRTL_OSVERSIONINFOW aOutVersionInformation);
+
+VOID NTAPI RtlAcquireSRWLockExclusive(PSRWLOCK aLock);
+VOID NTAPI RtlAcquireSRWLockShared(PSRWLOCK aLock);
+
+VOID NTAPI RtlReleaseSRWLockExclusive(PSRWLOCK aLock);
+VOID NTAPI RtlReleaseSRWLockShared(PSRWLOCK aLock);
+
+ULONG NTAPI RtlNtStatusToDosError(NTSTATUS aStatus);
+VOID NTAPI RtlSetLastWin32Error(DWORD aError);
+DWORD NTAPI RtlGetLastWin32Error();
+
+VOID NTAPI RtlRunOnceInitialize(PRTL_RUN_ONCE aRunOnce);
+
+NTSTATUS NTAPI NtReadVirtualMemory(HANDLE aProcessHandle, PVOID aBaseAddress,
+                                   PVOID aBuffer, SIZE_T aNumBytesToRead,
+                                   PSIZE_T aNumBytesRead);
+
+NTSTATUS NTAPI LdrLoadDll(PWCHAR aDllPath, PULONG aFlags,
+                          PUNICODE_STRING aDllName, PHANDLE aOutHandle);
+
+typedef ULONG(NTAPI* PRTL_RUN_ONCE_INIT_FN)(PRTL_RUN_ONCE, PVOID, PVOID*);
+NTSTATUS NTAPI RtlRunOnceExecuteOnce(PRTL_RUN_ONCE aRunOnce,
+                                     PRTL_RUN_ONCE_INIT_FN aInitFn,
+                                     PVOID aContext, PVOID* aParameter);
+
+}  // extern "C"
+
+#endif  // !defined(MOZILLA_INTERNAL_API)
+
+extern "C" {
+PVOID NTAPI RtlAllocateHeap(PVOID aHeapHandle, ULONG aFlags, SIZE_T aSize);
+
+PVOID NTAPI RtlReAllocateHeap(PVOID aHeapHandle, ULONG aFlags, LPVOID aMem,
+                              SIZE_T aNewSize);
+
+BOOLEAN NTAPI RtlFreeHeap(PVOID aHeapHandle, ULONG aFlags, PVOID aHeapBase);
+
+BOOLEAN NTAPI RtlQueryPerformanceCounter(LARGE_INTEGER* aPerfCount);
+
+#define RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE 1
+#define RTL_DUPLICATE_UNICODE_STRING_ALLOCATE_NULL_STRING 2
+NTSTATUS NTAPI RtlDuplicateUnicodeString(ULONG aFlags, PCUNICODE_STRING aSrc,
+                                         PUNICODE_STRING aDest);
+
+VOID NTAPI RtlFreeUnicodeString(PUNICODE_STRING aUnicodeString);
+}  // extern "C"
+
+namespace mozilla {
+namespace nt {
+
+/**
+ * This class encapsulates a UNICODE_STRING that owns its own buffer. The
+ * buffer is always NULL terminated, thus allowing us to cast to a wide C-string
+ * without requiring any mutation.
+ *
+ * We only allow creation of this owned buffer from outside XUL.
+ */
+class AllocatedUnicodeString final {
+ public:
+  AllocatedUnicodeString() : mUnicodeString() {}
+
+#if defined(MOZILLA_INTERNAL_API)
+  AllocatedUnicodeString(const AllocatedUnicodeString& aOther) = delete;
+
+  AllocatedUnicodeString& operator=(const AllocatedUnicodeString& aOther) =
+      delete;
+#else
+  explicit AllocatedUnicodeString(PCUNICODE_STRING aSrc) {
+    if (!aSrc) {
+      mUnicodeString = {};
+      return;
+    }
+
+    Duplicate(aSrc);
+  }
+
+  explicit AllocatedUnicodeString(const char* aSrc) {
+    if (!aSrc) {
+      mUnicodeString = {};
+      return;
+    }
+
+    Duplicate(aSrc);
+  }
+
+  AllocatedUnicodeString(const AllocatedUnicodeString& aOther) {
+    Duplicate(&aOther.mUnicodeString);
+  }
+
+  AllocatedUnicodeString& operator=(const AllocatedUnicodeString& aOther) {
+    Clear();
+    Duplicate(&aOther.mUnicodeString);
+    return *this;
+  }
+
+  AllocatedUnicodeString& operator=(PCUNICODE_STRING aSrc) {
+    Clear();
+    Duplicate(aSrc);
+    return *this;
+  }
+#endif  // defined(MOZILLA_INTERNAL_API)
+
+  AllocatedUnicodeString(AllocatedUnicodeString&& aOther)
+      : mUnicodeString(aOther.mUnicodeString) {
+    aOther.mUnicodeString = {};
+  }
+
+  AllocatedUnicodeString& operator=(AllocatedUnicodeString&& aOther) {
+    Clear();
+    mUnicodeString = aOther.mUnicodeString;
+    aOther.mUnicodeString = {};
+    return *this;
+  }
+
+  ~AllocatedUnicodeString() { Clear(); }
+
+  bool IsEmpty() const {
+    return !mUnicodeString.Buffer || !mUnicodeString.Length;
+  }
+
+  operator PCUNICODE_STRING() const { return &mUnicodeString; }
+
+  operator const WCHAR*() const { return mUnicodeString.Buffer; }
+
+  USHORT CharLen() const { return mUnicodeString.Length / sizeof(WCHAR); }
+
+#if defined(MOZILLA_INTERNAL_API)
+  nsDependentString AsString() const {
+    if (!mUnicodeString.Buffer) {
+      return nsDependentString();
+    }
+
+    // We can use nsDependentString here as we guaranteed null termination
+    // when we allocated the string.
+    return nsDependentString(mUnicodeString.Buffer, CharLen());
+  }
+#endif  // defined(MOZILLA_INTERNAL_API)
+
+ private:
+#if !defined(MOZILLA_INTERNAL_API)
+  void Duplicate(PCUNICODE_STRING aSrc) {
+    MOZ_ASSERT(aSrc);
+
+    // We duplicate with null termination so that this string may be used
+    // as a wide C-string without any further manipulation.
+    NTSTATUS ntStatus = ::RtlDuplicateUnicodeString(
+        RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE, aSrc, &mUnicodeString);
+    MOZ_ASSERT(NT_SUCCESS(ntStatus));
+    if (!NT_SUCCESS(ntStatus)) {
+      // Make sure that mUnicodeString does not contain bogus data
+      // (since not all callers zero it out before invoking)
+      mUnicodeString = {};
+    }
+  }
+
+  void Duplicate(const char* aSrc) {
+    MOZ_ASSERT(aSrc);
+
+    ANSI_STRING ansiStr;
+    RtlInitAnsiString(&ansiStr, aSrc);
+    NTSTATUS ntStatus =
+        ::RtlAnsiStringToUnicodeString(&mUnicodeString, &ansiStr, TRUE);
+    MOZ_ASSERT(NT_SUCCESS(ntStatus));
+    if (!NT_SUCCESS(ntStatus)) {
+      mUnicodeString = {};
+    }
+  }
+#endif  // !defined(MOZILLA_INTERNAL_API)
+
+  void Clear() {
+    if (!mUnicodeString.Buffer) {
+      return;
+    }
+
+    ::RtlFreeUnicodeString(&mUnicodeString);
+    mUnicodeString = {};
+  }
+
+  UNICODE_STRING mUnicodeString;
+};
+
+#if !defined(MOZILLA_INTERNAL_API)
+
+struct MemorySectionNameBuf : public _MEMORY_SECTION_NAME {
+  MemorySectionNameBuf() {
+    mSectionFileName.Length = 0;
+    mSectionFileName.MaximumLength = sizeof(mBuf);
+    mSectionFileName.Buffer = mBuf;
+  }
+
+  MemorySectionNameBuf(const MemorySectionNameBuf& aOther) { *this = aOther; }
+
+  MemorySectionNameBuf(MemorySectionNameBuf&& aOther) {
+    *this = std::move(aOther);
+  }
+
+  // We cannot use default copy here because mSectionFileName.Buffer needs to
+  // be updated to point to |this->mBuf|, not |aOther.mBuf|.
+  MemorySectionNameBuf& operator=(const MemorySectionNameBuf& aOther) {
+    mSectionFileName.Length = aOther.mSectionFileName.Length;
+    mSectionFileName.MaximumLength = sizeof(mBuf);
+    MOZ_ASSERT(mSectionFileName.Length <= mSectionFileName.MaximumLength);
+    mSectionFileName.Buffer = mBuf;
+    memcpy(mBuf, aOther.mBuf, aOther.mSectionFileName.Length);
+    return *this;
+  }
+
+  MemorySectionNameBuf& operator=(MemorySectionNameBuf&& aOther) {
+    mSectionFileName.Length = aOther.mSectionFileName.Length;
+    aOther.mSectionFileName.Length = 0;
+    mSectionFileName.MaximumLength = sizeof(mBuf);
+    MOZ_ASSERT(mSectionFileName.Length <= mSectionFileName.MaximumLength);
+    aOther.mSectionFileName.MaximumLength = sizeof(aOther.mBuf);
+    mSectionFileName.Buffer = mBuf;
+    memmove(mBuf, aOther.mBuf, mSectionFileName.Length);
+    return *this;
+  }
+
+  // Native NT paths, so we can't assume MAX_PATH. Use a larger buffer.
+  WCHAR mBuf[2 * MAX_PATH];
+
+  bool IsEmpty() const {
+    return !mSectionFileName.Buffer || !mSectionFileName.Length;
+  }
+
+  operator PCUNICODE_STRING() const { return &mSectionFileName; }
+};
+
+class MemorySectionNameOnHeap {
+  UniquePtr<uint8_t[]> mBuffer;
+
+  MemorySectionNameOnHeap() = default;
+  explicit MemorySectionNameOnHeap(size_t aBufferLen)
+      : mBuffer(MakeUnique<uint8_t[]>(aBufferLen)) {}
+
+ public:
+  static MemorySectionNameOnHeap GetBackingFilePath(HANDLE aProcess,
+                                                    void* aSectionAddr) {
+    SIZE_T bufferLen = MAX_PATH * 2;
+    do {
+      MemorySectionNameOnHeap sectionName(bufferLen);
+
+      SIZE_T requiredBytes;
+      NTSTATUS ntStatus = ::NtQueryVirtualMemory(
+          aProcess, aSectionAddr, MemorySectionName, sectionName.mBuffer.get(),
+          bufferLen, &requiredBytes);
+      if (NT_SUCCESS(ntStatus)) {
+        return sectionName;
+      }
+
+      if (ntStatus != STATUS_INFO_LENGTH_MISMATCH ||
+          bufferLen >= requiredBytes) {
+        break;
+      }
+
+      bufferLen = requiredBytes;
+    } while (1);
+
+    return MemorySectionNameOnHeap();
+  }
+
+  // Allow move & Disallow copy
+  MemorySectionNameOnHeap(MemorySectionNameOnHeap&&) = default;
+  MemorySectionNameOnHeap& operator=(MemorySectionNameOnHeap&&) = default;
+  MemorySectionNameOnHeap(const MemorySectionNameOnHeap&) = delete;
+  MemorySectionNameOnHeap& operator=(const MemorySectionNameOnHeap&) = delete;
+
+  PCUNICODE_STRING AsUnicodeString() const {
+    return reinterpret_cast<PCUNICODE_STRING>(mBuffer.get());
+  }
+};
+
+inline bool FindCharInUnicodeString(const UNICODE_STRING& aStr, WCHAR aChar,
+                                    uint16_t& aPos, uint16_t aStartIndex = 0) {
+  const uint16_t aMaxIndex = aStr.Length / sizeof(WCHAR);
+
+  for (uint16_t curIndex = aStartIndex; curIndex < aMaxIndex; ++curIndex) {
+    if (aStr.Buffer[curIndex] == aChar) {
+      aPos = curIndex;
+      return true;
+    }
+  }
+
+  return false;
+}
+
+inline bool IsHexDigit(WCHAR aChar) {
+  return (aChar >= L'0' && aChar <= L'9') || (aChar >= L'A' && aChar <= L'F') ||
+         (aChar >= L'a' && aChar <= L'f');
+}
+
+inline bool MatchUnicodeString(const UNICODE_STRING& aStr,
+                               bool (*aPredicate)(WCHAR)) {
+  WCHAR* cur = aStr.Buffer;
+  WCHAR* end = &aStr.Buffer[aStr.Length / sizeof(WCHAR)];
+  while (cur < end) {
+    if (!aPredicate(*cur)) {
+      return false;
+    }
+
+    ++cur;
+  }
+
+  return true;
+}
+
+inline bool Contains12DigitHexString(const UNICODE_STRING& aLeafName) {
+  // Quick check: If the string is too short, don't bother
+  // (We need at least 12 hex digits, one char for '.', and 3 for extension)
+  const USHORT kMinLen = (12 + 1 + 3) * sizeof(wchar_t);
+  if (aLeafName.Length < kMinLen) {
+    return false;
+  }
+
+  uint16_t start, end;
+  if (!FindCharInUnicodeString(aLeafName, L'.', start)) {
+    return false;
+  }
+
+  ++start;
+  if (!FindCharInUnicodeString(aLeafName, L'.', end, start)) {
+    return false;
+  }
+
+  if (end - start != 12) {
+    return false;
+  }
+
+  UNICODE_STRING test;
+  test.Buffer = &aLeafName.Buffer[start];
+  test.Length = (end - start) * sizeof(WCHAR);
+  test.MaximumLength = test.Length;
+
+  return MatchUnicodeString(test, &IsHexDigit);
+}
+
+inline bool IsFileNameAtLeast16HexDigits(const UNICODE_STRING& aLeafName) {
+  // Quick check: If the string is too short, don't bother
+  // (We need 16 hex digits, one char for '.', and 3 for extension)
+  const USHORT kMinLen = (16 + 1 + 3) * sizeof(wchar_t);
+  if (aLeafName.Length < kMinLen) {
+    return false;
+  }
+
+  uint16_t dotIndex;
+  if (!FindCharInUnicodeString(aLeafName, L'.', dotIndex)) {
+    return false;
+  }
+
+  if (dotIndex < 16) {
+    return false;
+  }
+
+  UNICODE_STRING test;
+  test.Buffer = aLeafName.Buffer;
+  test.Length = dotIndex * sizeof(WCHAR);
+  test.MaximumLength = aLeafName.MaximumLength;
+
+  return MatchUnicodeString(test, &IsHexDigit);
+}
+
+inline void GetLeafName(PUNICODE_STRING aDestString,
+                        PCUNICODE_STRING aSrcString) {
+  WCHAR* buf = aSrcString->Buffer;
+  WCHAR* end = &aSrcString->Buffer[(aSrcString->Length / sizeof(WCHAR)) - 1];
+  WCHAR* cur = end;
+  while (cur >= buf) {
+    if (*cur == L'\\') {
+      break;
+    }
+
+    --cur;
+  }
+
+  // At this point, either cur points to the final backslash, or it points to
+  // buf - 1. Either way, we're interested in cur + 1 as the desired buffer.
+  aDestString->Buffer = cur + 1;
+  aDestString->Length = (end - aDestString->Buffer + 1) * sizeof(WCHAR);
+  aDestString->MaximumLength = aDestString->Length;
+}
+
+#endif  // !defined(MOZILLA_INTERNAL_API)
+
+#if defined(MOZILLA_INTERNAL_API)
+
+inline const nsDependentSubstring GetLeafName(const nsAString& aString) {
+  auto it = aString.EndReading();
+  size_t pos = aString.Length();
+  while (it > aString.BeginReading()) {
+    if (*(it - 1) == u'\\') {
+      return Substring(aString, pos);
+    }
+
+    MOZ_ASSERT(pos > 0);
+    --pos;
+    --it;
+  }
+
+  return Substring(aString, 0);  // No backslash in the string
+}
+
+#endif  // defined(MOZILLA_INTERNAL_API)
+
+inline char EnsureLowerCaseASCII(char aChar) {
+  if (aChar >= 'A' && aChar <= 'Z') {
+    aChar -= 'A' - 'a';
+  }
+
+  return aChar;
+}
+
+inline int StricmpASCII(const char* aLeft, const char* aRight) {
+  char curLeft, curRight;
+
+  do {
+    curLeft = EnsureLowerCaseASCII(*(aLeft++));
+    curRight = EnsureLowerCaseASCII(*(aRight++));
+  } while (curLeft && curLeft == curRight);
+
+  return curLeft - curRight;
+}
+
+inline int StrcmpASCII(const char* aLeft, const char* aRight) {
+  char curLeft, curRight;
+
+  do {
+    curLeft = *(aLeft++);
+    curRight = *(aRight++);
+  } while (curLeft && curLeft == curRight);
+
+  return curLeft - curRight;
+}
+
+inline size_t StrlenASCII(const char* aStr) {
+  size_t len = 0;
+
+  while (*(aStr++)) {
+    ++len;
+  }
+
+  return len;
+}
+
+struct CodeViewRecord70 {
+  uint32_t signature;
+  GUID pdbSignature;
+  uint32_t pdbAge;
+  // A UTF-8 string, according to
+  // https://github.com/Microsoft/microsoft-pdb/blob/082c5290e5aff028ae84e43affa8be717aa7af73/PDB/dbi/locator.cpp#L785
+  char pdbFileName[1];
+};
+
+class MOZ_RAII PEHeaders final {
+  /**
+   * This structure is documented on MSDN as VS_VERSIONINFO, but is not present
+   * in SDK headers because it cannot be specified as a C struct. The following
+   * structure contains the fixed-length fields at the beginning of
+   * VS_VERSIONINFO.
+   */
+  struct VS_VERSIONINFO_HEADER {
+    WORD wLength;
+    WORD wValueLength;
+    WORD wType;
+    WCHAR szKey[16];  // ArrayLength(L"VS_VERSION_INFO")
+    // Additional data goes here, aligned on a 4-byte boundary
+  };
+
+ public:
+  // The lowest two bits of an HMODULE are used as flags. Stripping those bits
+  // from the HMODULE yields the base address of the binary's memory mapping.
+  // (See LoadLibraryEx docs on MSDN)
+  template <typename T>
+  static T HModuleToBaseAddr(HMODULE aModule) {
+    return reinterpret_cast<T>(reinterpret_cast<uintptr_t>(aModule) &
+                               ~uintptr_t(3));
+  }
+
+  explicit PEHeaders(void* aBaseAddress)
+      : PEHeaders(reinterpret_cast<PIMAGE_DOS_HEADER>(aBaseAddress)) {}
+
+  explicit PEHeaders(HMODULE aModule)
+      : PEHeaders(HModuleToBaseAddr<PIMAGE_DOS_HEADER>(aModule)) {}
+
+  explicit PEHeaders(PIMAGE_DOS_HEADER aMzHeader)
+      : mMzHeader(aMzHeader),
+        mPeHeader(nullptr),
+        mImageLimit(nullptr),
+        mIsImportDirectoryTampered(false) {
+    if (!mMzHeader || mMzHeader->e_magic != IMAGE_DOS_SIGNATURE) {
+      return;
+    }
+
+    mPeHeader = RVAToPtrUnchecked<PIMAGE_NT_HEADERS>(mMzHeader->e_lfanew);
+    if (!mPeHeader || mPeHeader->Signature != IMAGE_NT_SIGNATURE) {
+      return;
+    }
+
+    if (mPeHeader->OptionalHeader.Magic != IMAGE_NT_OPTIONAL_HDR_MAGIC) {
+      return;
+    }
+
+    DWORD imageSize = mPeHeader->OptionalHeader.SizeOfImage;
+    // This is a coarse-grained check to ensure that the image size is
+    // reasonable. It we aren't big enough to contain headers, we have a
+    // problem!
+    if (imageSize < sizeof(IMAGE_DOS_HEADER) + sizeof(IMAGE_NT_HEADERS)) {
+      return;
+    }
+
+    mImageLimit = RVAToPtrUnchecked<void*>(imageSize - 1UL);
+
+    PIMAGE_DATA_DIRECTORY importDirEntry =
+        GetImageDirectoryEntryPtr(IMAGE_DIRECTORY_ENTRY_IMPORT);
+    if (!importDirEntry) {
+      return;
+    }
+
+    mIsImportDirectoryTampered = (importDirEntry->VirtualAddress >= imageSize);
+  }
+
+  explicit operator bool() const { return !!mImageLimit; }
+
+  /**
+   * This overload computes absolute virtual addresses relative to the base
+   * address of the binary.
+   */
+  template <typename T, typename R>
+  T RVAToPtr(R aRva) const {
+    return RVAToPtr<T>(mMzHeader, aRva);
+  }
+
+  /**
+   * This overload computes a result by adding aRva to aBase, but also ensures
+   * that the resulting pointer falls within the bounds of this binary's memory
+   * mapping.
+   */
+  template <typename T, typename R>
+  T RVAToPtr(void* aBase, R aRva) const {
+    if (!mImageLimit) {
+      return nullptr;
+    }
+
+    char* absAddress = reinterpret_cast<char*>(aBase) + aRva;
+    if (absAddress < reinterpret_cast<char*>(mMzHeader) ||
+        absAddress > reinterpret_cast<char*>(mImageLimit)) {
+      return nullptr;
+    }
+
+    return reinterpret_cast<T>(absAddress);
+  }
+
+  Maybe<Range<const uint8_t>> GetBounds() const {
+    if (!mImageLimit) {
+      return Nothing();
+    }
+
+    auto base = reinterpret_cast<const uint8_t*>(mMzHeader);
+    DWORD imageSize = mPeHeader->OptionalHeader.SizeOfImage;
+    return Some(Range(base, imageSize));
+  }
+
+  DWORD GetFileCharacteristics() const {
+    return mPeHeader ? mPeHeader->FileHeader.Characteristics : 0;
+  }
+
+  bool IsWithinImage(const void* aAddress) const {
+    uintptr_t addr = reinterpret_cast<uintptr_t>(aAddress);
+    uintptr_t imageBase = reinterpret_cast<uintptr_t>(mMzHeader);
+    uintptr_t imageLimit = reinterpret_cast<uintptr_t>(mImageLimit);
+    return addr >= imageBase && addr <= imageLimit;
+  }
+
+  PIMAGE_IMPORT_DESCRIPTOR GetImportDirectory() const {
+    // If the import directory is already tampered, we skip bounds check
+    // because it could be located outside the mapped image.
+    return mIsImportDirectoryTampered
+               ? GetImageDirectoryEntry<PIMAGE_IMPORT_DESCRIPTOR,
+                                        BoundsCheckPolicy::Skip>(
+                     IMAGE_DIRECTORY_ENTRY_IMPORT)
+               : GetImageDirectoryEntry<PIMAGE_IMPORT_DESCRIPTOR>(
+                     IMAGE_DIRECTORY_ENTRY_IMPORT);
+  }
+
+  PIMAGE_RESOURCE_DIRECTORY GetResourceTable() const {
+    return GetImageDirectoryEntry<PIMAGE_RESOURCE_DIRECTORY>(
+        IMAGE_DIRECTORY_ENTRY_RESOURCE);
+  }
+
+  PIMAGE_DATA_DIRECTORY GetImageDirectoryEntryPtr(
+      const uint32_t aDirectoryIndex, uint32_t* aOutRva = nullptr) const {
+    if (aOutRva) {
+      *aOutRva = 0;
+    }
+
+    IMAGE_OPTIONAL_HEADER& optionalHeader = mPeHeader->OptionalHeader;
+
+    const uint32_t maxIndex = std::min(optionalHeader.NumberOfRvaAndSizes,
+                                       DWORD(IMAGE_NUMBEROF_DIRECTORY_ENTRIES));
+    if (aDirectoryIndex >= maxIndex) {
+      return nullptr;
+    }
+
+    PIMAGE_DATA_DIRECTORY dirEntry =
+        &optionalHeader.DataDirectory[aDirectoryIndex];
+    if (aOutRva) {
+      *aOutRva = reinterpret_cast<char*>(dirEntry) -
+                 reinterpret_cast<char*>(mMzHeader);
+      MOZ_ASSERT(*aOutRva);
+    }
+
+    return dirEntry;
+  }
+
+  bool GetVersionInfo(uint64_t& aOutVersion) const {
+    // RT_VERSION == 16
+    // Version resources require an id of 1
+    auto root = FindResourceLeaf<VS_VERSIONINFO_HEADER*>(16, 1);
+    if (!root) {
+      return false;
+    }
+
+    VS_FIXEDFILEINFO* fixedInfo = GetFixedFileInfo(root);
+    if (!fixedInfo) {
+      return false;
+    }
+
+    aOutVersion = ((static_cast<uint64_t>(fixedInfo->dwFileVersionMS) << 32) |
+                   static_cast<uint64_t>(fixedInfo->dwFileVersionLS));
+    return true;
+  }
+
+  bool GetTimeStamp(DWORD& aResult) const {
+    if (!(*this)) {
+      return false;
+    }
+
+    aResult = mPeHeader->FileHeader.TimeDateStamp;
+    return true;
+  }
+
+  bool GetImageSize(DWORD& aResult) const {
+    if (!(*this)) {
+      return false;
+    }
+
+    aResult = mPeHeader->OptionalHeader.SizeOfImage;
+    return true;
+  }
+
+  bool GetCheckSum(DWORD& aResult) const {
+    if (!(*this)) {
+      return false;
+    }
+
+    aResult = mPeHeader->OptionalHeader.CheckSum;
+    return true;
+  }
+
+  PIMAGE_IMPORT_DESCRIPTOR
+  GetImportDescriptor(const char* aModuleNameASCII) const {
+    for (PIMAGE_IMPORT_DESCRIPTOR curImpDesc = GetImportDirectory();
+         IsValid(curImpDesc); ++curImpDesc) {
+      auto curName = mIsImportDirectoryTampered
+                         ? RVAToPtrUnchecked<const char*>(curImpDesc->Name)
+                         : RVAToPtr<const char*>(curImpDesc->Name);
+      if (!curName) {
+        return nullptr;
+      }
+
+      if (StricmpASCII(aModuleNameASCII, curName)) {
+        continue;
+      }
+
+      // curImpDesc now points to the IAT for the module we're interested in
+      return curImpDesc;
+    }
+
+    return nullptr;
+  }
+
+  template <typename CallbackT>
+  void EnumImportChunks(const CallbackT& aCallback) const {
+    for (PIMAGE_IMPORT_DESCRIPTOR curImpDesc = GetImportDirectory();
+         IsValid(curImpDesc); ++curImpDesc) {
+      auto curName = mIsImportDirectoryTampered
+                         ? RVAToPtrUnchecked<const char*>(curImpDesc->Name)
+                         : RVAToPtr<const char*>(curImpDesc->Name);
+      if (!curName) {
+        continue;
+      }
+
+      aCallback(curName);
+    }
+  }
+
+  /**
+   * If |aBoundaries| is given, this method checks whether each IAT entry is
+   * within the given range, and if any entry is out of the range, we return
+   * Nothing().
+   */
+  Maybe<Span<IMAGE_THUNK_DATA>> GetIATThunksForModule(
+      const char* aModuleNameASCII,
+      const Range<const uint8_t>* aBoundaries = nullptr) const {
+    PIMAGE_IMPORT_DESCRIPTOR impDesc = GetImportDescriptor(aModuleNameASCII);
+    if (!impDesc) {
+      return Nothing();
+    }
+
+    auto firstIatThunk =
+        this->template RVAToPtr<PIMAGE_THUNK_DATA>(impDesc->FirstThunk);
+    if (!firstIatThunk) {
+      return Nothing();
+    }
+
+    // Find the length by iterating through the table until we find a null entry
+    PIMAGE_THUNK_DATA curIatThunk = firstIatThunk;
+    while (IsValid(curIatThunk)) {
+      if (aBoundaries) {
+        auto iatEntry =
+            reinterpret_cast<const uint8_t*>(curIatThunk->u1.Function);
+        if (iatEntry < aBoundaries->begin().get() ||
+            iatEntry >= aBoundaries->end().get()) {
+          return Nothing();
+        }
+      }
+
+      ++curIatThunk;
+    }
+
+    return Some(Span(firstIatThunk, curIatThunk));
+  }
+
+  /**
+   * Resources are stored in a three-level tree. To locate a particular entry,
+   * you must supply a resource type, the resource id, and then the language id.
+   * If aLangId == 0, we just resolve the first entry regardless of language.
+   */
+  template <typename T>
+  T FindResourceLeaf(WORD aType, WORD aResId, WORD aLangId = 0) const {
+    PIMAGE_RESOURCE_DIRECTORY topLevel = GetResourceTable();
+    if (!topLevel) {
+      return nullptr;
+    }
+
+    PIMAGE_RESOURCE_DIRECTORY_ENTRY typeEntry =
+        FindResourceEntry(topLevel, aType);
+    if (!typeEntry || !typeEntry->DataIsDirectory) {
+      return nullptr;
+    }
+
+    auto idDir = RVAToPtr<PIMAGE_RESOURCE_DIRECTORY>(
+        topLevel, typeEntry->OffsetToDirectory);
+    PIMAGE_RESOURCE_DIRECTORY_ENTRY idEntry = FindResourceEntry(idDir, aResId);
+    if (!idEntry || !idEntry->DataIsDirectory) {
+      return nullptr;
+    }
+
+    auto langDir = RVAToPtr<PIMAGE_RESOURCE_DIRECTORY>(
+        topLevel, idEntry->OffsetToDirectory);
+    PIMAGE_RESOURCE_DIRECTORY_ENTRY langEntry;
+    if (aLangId) {
+      langEntry = FindResourceEntry(langDir, aLangId);
+    } else {
+      langEntry = FindFirstResourceEntry(langDir);
+    }
+
+    if (!langEntry || langEntry->DataIsDirectory) {
+      return nullptr;
+    }
+
+    auto dataEntry =
+        RVAToPtr<PIMAGE_RESOURCE_DATA_ENTRY>(topLevel, langEntry->OffsetToData);
+    return dataEntry ? RVAToPtr<T>(dataEntry->OffsetToData) : nullptr;
+  }
+
+  template <size_t N>
+  Maybe<Span<const uint8_t>> FindSection(const char (&aSecName)[N],
+                                         DWORD aCharacteristicsMask) const {
+    static_assert((N - 1) <= IMAGE_SIZEOF_SHORT_NAME,
+                  "Section names must be at most 8 characters excluding null "
+                  "terminator");
+
+    if (!(*this)) {
+      return Nothing();
+    }
+
+    Span<IMAGE_SECTION_HEADER> sectionTable = GetSectionTable();
+    for (auto&& sectionHeader : sectionTable) {
+      if (strncmp(reinterpret_cast<const char*>(sectionHeader.Name), aSecName,
+                  IMAGE_SIZEOF_SHORT_NAME)) {
+        continue;
+      }
+
+      if (!(sectionHeader.Characteristics & aCharacteristicsMask)) {
+        // We found the section but it does not have the expected
+        // characteristics
+        return Nothing();
+      }
+
+      DWORD rva = sectionHeader.VirtualAddress;
+      if (!rva) {
+        return Nothing();
+      }
+
+      DWORD size = sectionHeader.Misc.VirtualSize;
+      if (!size) {
+        return Nothing();
+      }
+
+      auto base = RVAToPtr<const uint8_t*>(rva);
+      return Some(Span(base, size));
+    }
+
+    return Nothing();
+  }
+
+  // There may be other code sections in the binary besides .text
+  Maybe<Span<const uint8_t>> GetTextSectionInfo() const {
+    return FindSection(".text", IMAGE_SCN_CNT_CODE | IMAGE_SCN_MEM_EXECUTE |
+                                    IMAGE_SCN_MEM_READ);
+  }
+
+  static bool IsValid(PIMAGE_IMPORT_DESCRIPTOR aImpDesc) {
+    return aImpDesc && aImpDesc->OriginalFirstThunk != 0;
+  }
+
+  static bool IsValid(PIMAGE_THUNK_DATA aImgThunk) {
+    return aImgThunk && aImgThunk->u1.Ordinal != 0;
+  }
+
+  bool IsImportDirectoryTampered() const { return mIsImportDirectoryTampered; }
+
+  FARPROC GetEntryPoint() const {
+    // Use the unchecked version because the entrypoint may be tampered.
+    return RVAToPtrUnchecked<FARPROC>(
+        mPeHeader->OptionalHeader.AddressOfEntryPoint);
+  }
+
+  const CodeViewRecord70* GetPdbInfo() const {
+    PIMAGE_DEBUG_DIRECTORY debugDirectory =
+        GetImageDirectoryEntry<PIMAGE_DEBUG_DIRECTORY>(
+            IMAGE_DIRECTORY_ENTRY_DEBUG);
+    if (!debugDirectory) {
+      return nullptr;
+    }
+
+    const CodeViewRecord70* debugInfo =
+        RVAToPtr<CodeViewRecord70*>(debugDirectory->AddressOfRawData);
+    return (debugInfo && debugInfo->signature == 'SDSR') ? debugInfo : nullptr;
+  }
+
+ private:
+  enum class BoundsCheckPolicy { Default, Skip };
+
+  template <typename T, BoundsCheckPolicy Policy = BoundsCheckPolicy::Default>
+  T GetImageDirectoryEntry(const uint32_t aDirectoryIndex) const {
+    PIMAGE_DATA_DIRECTORY dirEntry = GetImageDirectoryEntryPtr(aDirectoryIndex);
+    if (!dirEntry) {
+      return nullptr;
+    }
+
+    return Policy == BoundsCheckPolicy::Skip
+               ? RVAToPtrUnchecked<T>(dirEntry->VirtualAddress)
+               : RVAToPtr<T>(dirEntry->VirtualAddress);
+  }
+
+  // This private variant does not have bounds checks, because we need to be
+  // able to resolve the bounds themselves.
+  template <typename T, typename R>
+  T RVAToPtrUnchecked(R aRva) const {
+    return reinterpret_cast<T>(reinterpret_cast<char*>(mMzHeader) + aRva);
+  }
+
+  Span<IMAGE_SECTION_HEADER> GetSectionTable() const {
+    MOZ_ASSERT(*this);
+    auto base = RVAToPtr<PIMAGE_SECTION_HEADER>(
+        &mPeHeader->OptionalHeader, mPeHeader->FileHeader.SizeOfOptionalHeader);
+    // The Windows loader has an internal limit of 96 sections (per PE spec)
+    auto numSections =
+        std::min(mPeHeader->FileHeader.NumberOfSections, WORD(96));
+    return Span{base, numSections};
+  }
+
+  PIMAGE_RESOURCE_DIRECTORY_ENTRY
+  FindResourceEntry(PIMAGE_RESOURCE_DIRECTORY aCurLevel, WORD aId) const {
+    if (!aCurLevel) {
+      return nullptr;
+    }
+
+    // Immediately after the IMAGE_RESOURCE_DIRECTORY structure is an array
+    // of IMAGE_RESOURCE_DIRECTORY_ENTRY structures. Since this function
+    // searches by ID, we need to skip past any named entries before iterating.
+    auto dirEnt =
+        reinterpret_cast<PIMAGE_RESOURCE_DIRECTORY_ENTRY>(aCurLevel + 1) +
+        aCurLevel->NumberOfNamedEntries;
+    if (!(IsWithinImage(dirEnt) &&
+          IsWithinImage(&dirEnt[aCurLevel->NumberOfIdEntries - 1].Id))) {
+      return nullptr;
+    }
+
+    for (WORD i = 0; i < aCurLevel->NumberOfIdEntries; ++i) {
+      if (dirEnt[i].Id == aId) {
+        return &dirEnt[i];
+      }
+    }
+
+    return nullptr;
+  }
+
+  PIMAGE_RESOURCE_DIRECTORY_ENTRY
+  FindFirstResourceEntry(PIMAGE_RESOURCE_DIRECTORY aCurLevel) const {
+    // Immediately after the IMAGE_RESOURCE_DIRECTORY structure is an array
+    // of IMAGE_RESOURCE_DIRECTORY_ENTRY structures. We just return the first
+    // entry, regardless of whether it is indexed by name or by id.
+    auto dirEnt =
+        reinterpret_cast<PIMAGE_RESOURCE_DIRECTORY_ENTRY>(aCurLevel + 1);
+    WORD numEntries =
+        aCurLevel->NumberOfNamedEntries + aCurLevel->NumberOfIdEntries;
+    if (!numEntries) {
+      return nullptr;
+    }
+
+    return dirEnt;
+  }
+
+  VS_FIXEDFILEINFO* GetFixedFileInfo(VS_VERSIONINFO_HEADER* aVerInfo) const {
+    WORD length = aVerInfo->wLength;
+    if (length < sizeof(VS_VERSIONINFO_HEADER)) {
+      return nullptr;
+    }
+
+    const wchar_t kVersionInfoKey[] = L"VS_VERSION_INFO";
+    if (::RtlCompareMemory(aVerInfo->szKey, kVersionInfoKey,
+                           ArrayLength(kVersionInfoKey)) !=
+        ArrayLength(kVersionInfoKey)) {
+      return nullptr;
+    }
+
+    if (aVerInfo->wValueLength != sizeof(VS_FIXEDFILEINFO)) {
+      // Fixed file info does not exist
+      return nullptr;
+    }
+
+    WORD offset = sizeof(VS_VERSIONINFO_HEADER);
+
+    uintptr_t base = reinterpret_cast<uintptr_t>(aVerInfo);
+    // Align up to 4-byte boundary
+#pragma warning(suppress : 4146)
+    offset += (-(base + offset) & 3);
+
+    if (offset >= length) {
+      return nullptr;
+    }
+
+    auto result = reinterpret_cast<VS_FIXEDFILEINFO*>(base + offset);
+    if (result->dwSignature != 0xFEEF04BD) {
+      return nullptr;
+    }
+
+    return result;
+  }
+
+ private:
+  PIMAGE_DOS_HEADER mMzHeader;
+  PIMAGE_NT_HEADERS mPeHeader;
+  void* mImageLimit;
+  bool mIsImportDirectoryTampered;
+};
+
+// This class represents an export section of a local/remote process.
+template <typename MMPolicy>
+class MOZ_RAII PEExportSection {
+  const MMPolicy& mMMPolicy;
+  uintptr_t mImageBase;
+  DWORD mOrdinalBase;
+  DWORD mRvaDirStart;
+  DWORD mRvaDirEnd;
+  mozilla::interceptor::TargetObjectArray<MMPolicy, DWORD> mExportAddressTable;
+  mozilla::interceptor::TargetObjectArray<MMPolicy, DWORD> mExportNameTable;
+  mozilla::interceptor::TargetObjectArray<MMPolicy, WORD> mExportOrdinalTable;
+
+  explicit PEExportSection(const MMPolicy& aMMPolicy)
+      : mMMPolicy(aMMPolicy),
+        mImageBase(0),
+        mOrdinalBase(0),
+        mRvaDirStart(0),
+        mRvaDirEnd(0),
+        mExportAddressTable(mMMPolicy),
+        mExportNameTable(mMMPolicy),
+        mExportOrdinalTable(mMMPolicy) {}
+
+  PEExportSection(const MMPolicy& aMMPolicy, uintptr_t aImageBase,
+                  DWORD aRvaDirStart, DWORD aRvaDirEnd,
+                  const IMAGE_EXPORT_DIRECTORY& exportDir)
+      : mMMPolicy(aMMPolicy),
+        mImageBase(aImageBase),
+        mOrdinalBase(exportDir.Base),
+        mRvaDirStart(aRvaDirStart),
+        mRvaDirEnd(aRvaDirEnd),
+        mExportAddressTable(mMMPolicy,
+                            mImageBase + exportDir.AddressOfFunctions,
+                            exportDir.NumberOfFunctions),
+        mExportNameTable(mMMPolicy, mImageBase + exportDir.AddressOfNames,
+                         exportDir.NumberOfNames),
+        mExportOrdinalTable(mMMPolicy,
+                            mImageBase + exportDir.AddressOfNameOrdinals,
+                            exportDir.NumberOfNames) {}
+
+  static const PEExportSection Get(uintptr_t aImageBase,
+                                   const MMPolicy& aMMPolicy) {
+    mozilla::interceptor::TargetObject<MMPolicy, IMAGE_DOS_HEADER> mzHeader(
+        aMMPolicy, aImageBase);
+    if (!mzHeader || mzHeader->e_magic != IMAGE_DOS_SIGNATURE) {
+      return PEExportSection(aMMPolicy);
+    }
+
+    mozilla::interceptor::TargetObject<MMPolicy, IMAGE_NT_HEADERS> peHeader(
+        aMMPolicy, aImageBase + mzHeader->e_lfanew);
+    if (!peHeader || peHeader->Signature != IMAGE_NT_SIGNATURE) {
+      return PEExportSection(aMMPolicy);
+    }
+
+    if (peHeader->OptionalHeader.Magic != IMAGE_NT_OPTIONAL_HDR_MAGIC) {
+      return PEExportSection(aMMPolicy);
+    }
+
+    const IMAGE_OPTIONAL_HEADER& optionalHeader = peHeader->OptionalHeader;
+
+    DWORD imageSize = optionalHeader.SizeOfImage;
+    // This is a coarse-grained check to ensure that the image size is
+    // reasonable. It we aren't big enough to contain headers, we have a
+    // problem!
+    if (imageSize < sizeof(IMAGE_DOS_HEADER) + sizeof(IMAGE_NT_HEADERS)) {
+      return PEExportSection(aMMPolicy);
+    }
+
+    if (optionalHeader.NumberOfRvaAndSizes <= IMAGE_DIRECTORY_ENTRY_EXPORT) {
+      return PEExportSection(aMMPolicy);
+    }
+
+    const IMAGE_DATA_DIRECTORY& exportDirectoryEntry =
+        optionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT];
+    if (!exportDirectoryEntry.VirtualAddress || !exportDirectoryEntry.Size) {
+      return PEExportSection(aMMPolicy);
+    }
+
+    mozilla::interceptor::TargetObject<MMPolicy, IMAGE_EXPORT_DIRECTORY>
+        exportDirectory(aMMPolicy,
+                        aImageBase + exportDirectoryEntry.VirtualAddress);
+    if (!exportDirectory || !exportDirectory->NumberOfFunctions) {
+      return PEExportSection(aMMPolicy);
+    }
+
+    return PEExportSection(
+        aMMPolicy, aImageBase, exportDirectoryEntry.VirtualAddress,
+        exportDirectoryEntry.VirtualAddress + exportDirectoryEntry.Size,
+        *exportDirectory.GetLocalBase());
+  }
+
+  FARPROC GetProcAddressByOrdinal(WORD aOrdinal) const {
+    if (aOrdinal < mOrdinalBase) {
+      return nullptr;
+    }
+
+    auto rvaToFunction = mExportAddressTable[aOrdinal - mOrdinalBase];
+    if (!rvaToFunction) {
+      return nullptr;
+    }
+    return reinterpret_cast<FARPROC>(mImageBase + *rvaToFunction);
+  }
+
+ public:
+  static const PEExportSection Get(HMODULE aModule, const MMPolicy& aMMPolicy) {
+    return Get(PEHeaders::HModuleToBaseAddr<uintptr_t>(aModule), aMMPolicy);
+  }
+
+  explicit operator bool() const {
+    // Because PEExportSection doesn't use MMPolicy::Reserve(), a boolified
+    // mMMPolicy is expected to be false.  We don't check mMMPolicy here.
+    return mImageBase && mRvaDirStart && mRvaDirEnd && mExportAddressTable &&
+           mExportNameTable && mExportOrdinalTable;
+  }
+
+  template <typename T>
+  T RVAToPtr(uint32_t aRva) const {
+    return reinterpret_cast<T>(mImageBase + aRva);
+  }
+
+  PIMAGE_EXPORT_DIRECTORY GetExportDirectory() const {
+    if (!*this) {
+      return nullptr;
+    }
+
+    return RVAToPtr<PIMAGE_EXPORT_DIRECTORY>(mRvaDirStart);
+  }
+
+  /**
+   * This functions searches the export table for a given string as
+   * GetProcAddress does, but this returns a matched entry of the Export
+   * Address Table i.e. a pointer to an RVA of a matched function instead
+   * of a function address.  If the entry is forwarded, this function
+   * returns nullptr.
+   */
+  const DWORD* FindExportAddressTableEntry(
+      const char* aFunctionNameASCII) const {
+    if (!*this || !aFunctionNameASCII) {
+      return nullptr;
+    }
+
+    struct NameTableComparator {
+      NameTableComparator(const PEExportSection<MMPolicy>& aExportSection,
+                          const char* aTarget)
+          : mExportSection(aExportSection),
+            mTargetName(aTarget),
+            mTargetNamelength(StrlenASCII(aTarget)) {}
+
+      int operator()(DWORD aRVAToString) const {
+        mozilla::interceptor::TargetObjectArray<MMPolicy, char> itemString(
+            mExportSection.mMMPolicy, mExportSection.mImageBase + aRVAToString,
+            mTargetNamelength + 1);
+        return StrcmpASCII(mTargetName, itemString[0]);
+      }
+
+      const PEExportSection<MMPolicy>& mExportSection;
+      const char* mTargetName;
+      size_t mTargetNamelength;
+    };
+
+    const NameTableComparator comp(*this, aFunctionNameASCII);
+
+    size_t match;
+    if (!mExportNameTable.BinarySearchIf(comp, &match)) {
+      return nullptr;
+    }
+
+    const WORD* index = mExportOrdinalTable[match];
+    if (!index) {
+      return nullptr;
+    }
+
+    const DWORD* rvaToFunction = mExportAddressTable[*index];
+    if (!rvaToFunction) {
+      return nullptr;
+    }
+
+    if (*rvaToFunction >= mRvaDirStart && *rvaToFunction < mRvaDirEnd) {
+      // If an entry points to an address within the export section, the
+      // field is a forwarder RVA.  We return nullptr because the entry is
+      // not a function address but a null-terminated string used for export
+      // forwarding.
+      return nullptr;
+    }
+
+    return rvaToFunction;
+  }
+
+  /**
+   * This functions behaves the same as the native ::GetProcAddress except
+   * the following cases:
+   * - Returns nullptr if a target entry is forwarded to another dll.
+   */
+  FARPROC GetProcAddress(const char* aFunctionNameASCII) const {
+    uintptr_t maybeOdrinal = reinterpret_cast<uintptr_t>(aFunctionNameASCII);
+    // When the high-order word of |aFunctionNameASCII| is zero, it's not
+    // a string but an ordinal value.
+    if (maybeOdrinal < 0x10000) {
+      return GetProcAddressByOrdinal(static_cast<WORD>(maybeOdrinal));
+    }
+
+    auto rvaToFunction = FindExportAddressTableEntry(aFunctionNameASCII);
+    if (!rvaToFunction) {
+      return nullptr;
+    }
+    return reinterpret_cast<FARPROC>(mImageBase + *rvaToFunction);
+  }
+};
+
+inline HANDLE RtlGetProcessHeap() {
+  PTEB teb = ::NtCurrentTeb();
+  PPEB peb = teb->ProcessEnvironmentBlock;
+  return peb->Reserved4[1];
+}
+
+inline PVOID RtlGetThreadLocalStoragePointer() {
+  return ::NtCurrentTeb()->Reserved1[11];
+}
+
+inline void RtlSetThreadLocalStoragePointerForTestingOnly(PVOID aNewValue) {
+  ::NtCurrentTeb()->Reserved1[11] = aNewValue;
+}
+
+inline DWORD RtlGetCurrentThreadId() {
+  PTEB teb = ::NtCurrentTeb();
+  CLIENT_ID* cid = reinterpret_cast<CLIENT_ID*>(&teb->Reserved1[8]);
+  return static_cast<DWORD>(reinterpret_cast<uintptr_t>(cid->UniqueThread) &
+                            0xFFFFFFFFUL);
+}
+
+const HANDLE kCurrentProcess = reinterpret_cast<HANDLE>(-1);
+
+inline LauncherResult<DWORD> GetParentProcessId() {
+  struct PROCESS_BASIC_INFORMATION {
+    NTSTATUS ExitStatus;
+    PPEB PebBaseAddress;
+    ULONG_PTR AffinityMask;
+    LONG BasePriority;
+    ULONG_PTR UniqueProcessId;
+    ULONG_PTR InheritedFromUniqueProcessId;
+  };
+
+  ULONG returnLength;
+  PROCESS_BASIC_INFORMATION pbi = {};
+  NTSTATUS status =
+      ::NtQueryInformationProcess(kCurrentProcess, ProcessBasicInformation,
+                                  &pbi, sizeof(pbi), &returnLength);
+  if (!NT_SUCCESS(status)) {
+    return LAUNCHER_ERROR_FROM_NTSTATUS(status);
+  }
+
+  return static_cast<DWORD>(pbi.InheritedFromUniqueProcessId & 0xFFFFFFFF);
+}
+
+inline SIZE_T WINAPI VirtualQueryEx(HANDLE aProcess, LPCVOID aAddress,
+                                    PMEMORY_BASIC_INFORMATION aMemInfo,
+                                    SIZE_T aMemInfoLen) {
+#if defined(MOZILLA_INTERNAL_API)
+  return ::VirtualQueryEx(aProcess, aAddress, aMemInfo, aMemInfoLen);
+#else
+  SIZE_T returnedLength;
+  NTSTATUS status = ::NtQueryVirtualMemory(
+      aProcess, const_cast<PVOID>(aAddress), MemoryBasicInformation, aMemInfo,
+      aMemInfoLen, &returnedLength);
+  if (!NT_SUCCESS(status)) {
+    ::RtlSetLastWin32Error(::RtlNtStatusToDosError(status));
+    returnedLength = 0;
+  }
+  return returnedLength;
+#endif  // defined(MOZILLA_INTERNAL_API)
+}
+
+inline SIZE_T WINAPI VirtualQuery(LPCVOID aAddress,
+                                  PMEMORY_BASIC_INFORMATION aMemInfo,
+                                  SIZE_T aMemInfoLen) {
+  return nt::VirtualQueryEx(kCurrentProcess, aAddress, aMemInfo, aMemInfoLen);
+}
+
+struct DataDirectoryEntry : public _IMAGE_DATA_DIRECTORY {
+  DataDirectoryEntry() : _IMAGE_DATA_DIRECTORY() {}
+
+  MOZ_IMPLICIT DataDirectoryEntry(const _IMAGE_DATA_DIRECTORY& aOther)
+      : _IMAGE_DATA_DIRECTORY(aOther) {}
+
+  DataDirectoryEntry(const DataDirectoryEntry& aOther) = default;
+
+  bool operator==(const DataDirectoryEntry& aOther) const {
+    return VirtualAddress == aOther.VirtualAddress && Size == aOther.Size;
+  }
+
+  bool operator!=(const DataDirectoryEntry& aOther) const {
+    return !(*this == aOther);
+  }
+};
+
+inline LauncherResult<void*> GetProcessPebPtr(HANDLE aProcess) {
+  ULONG returnLength;
+  PROCESS_BASIC_INFORMATION pbi;
+  NTSTATUS status = ::NtQueryInformationProcess(
+      aProcess, ProcessBasicInformation, &pbi, sizeof(pbi), &returnLength);
+  if (!NT_SUCCESS(status)) {
+    return LAUNCHER_ERROR_FROM_NTSTATUS(status);
+  }
+
+  return pbi.PebBaseAddress;
+}
+
+/**
+ * This function relies on a specific offset into the mostly-undocumented PEB
+ * structure. The risk is reduced thanks to the fact that the Chromium sandbox
+ * relies on the location of this field. It is unlikely to change at this point.
+ * To further reduce the risk, we also check for the magic 'MZ' signature that
+ * should indicate the beginning of a PE image.
+ */
+inline LauncherResult<HMODULE> GetProcessExeModule(HANDLE aProcess) {
+  LauncherResult<void*> ppeb = GetProcessPebPtr(aProcess);
+  if (ppeb.isErr()) {
+    return ppeb.propagateErr();
+  }
+
+  PEB peb;
+  SIZE_T bytesRead;
+
+#if defined(MOZILLA_INTERNAL_API)
+  if (!::ReadProcessMemory(aProcess, ppeb.unwrap(), &peb, sizeof(peb),
+                           &bytesRead) ||
+      bytesRead != sizeof(peb)) {
+    return LAUNCHER_ERROR_FROM_LAST();
+  }
+#else
+  NTSTATUS ntStatus = ::NtReadVirtualMemory(aProcess, ppeb.unwrap(), &peb,
+                                            sizeof(peb), &bytesRead);
+  if (!NT_SUCCESS(ntStatus) || bytesRead != sizeof(peb)) {
+    return LAUNCHER_ERROR_FROM_NTSTATUS(ntStatus);
+  }
+#endif
+
+  // peb.ImageBaseAddress
+  void* baseAddress = peb.Reserved3[1];
+
+  char mzMagic[2];
+#if defined(MOZILLA_INTERNAL_API)
+  if (!::ReadProcessMemory(aProcess, baseAddress, mzMagic, sizeof(mzMagic),
+                           &bytesRead) ||
+      bytesRead != sizeof(mzMagic)) {
+    return LAUNCHER_ERROR_FROM_LAST();
+  }
+#else
+  ntStatus = ::NtReadVirtualMemory(aProcess, baseAddress, mzMagic,
+                                   sizeof(mzMagic), &bytesRead);
+  if (!NT_SUCCESS(ntStatus) || bytesRead != sizeof(mzMagic)) {
+    return LAUNCHER_ERROR_FROM_NTSTATUS(ntStatus);
+  }
+#endif
+
+  MOZ_ASSERT(mzMagic[0] == 'M' && mzMagic[1] == 'Z');
+  if (mzMagic[0] != 'M' || mzMagic[1] != 'Z') {
+    return LAUNCHER_ERROR_FROM_WIN32(ERROR_BAD_EXE_FORMAT);
+  }
+
+  return static_cast<HMODULE>(baseAddress);
+}
+
+#if defined(_MSC_VER)
+extern "C" IMAGE_DOS_HEADER __ImageBase;
+#endif
+
+// This class manages data transfer from the local process's executable
+// to another process's executable via WriteProcessMemory.
+// Bug 1662560 told us the same executable may be mapped onto a different
+// address in a different process.  This means when we transfer data within
+// the mapped executable such as a global variable or IAT from the current
+// process to another process, we need to shift its address by the difference
+// between two executable's mapped imagebase.
+class CrossExecTransferManager final {
+  HANDLE mRemoteProcess;
+  uint8_t* mLocalImagebase;
+  PEHeaders mLocalExec;
+  uint8_t* mRemoteImagebase;
+
+  static HMODULE GetLocalExecModule() {
+#if defined(_MSC_VER)
+    return reinterpret_cast<HMODULE>(&__ImageBase);
+#else
+    return ::GetModuleHandleW(nullptr);
+#endif
+  }
+
+  LauncherVoidResult EnsureRemoteImagebase() {
+    if (!mRemoteImagebase) {
+      LauncherResult<HMODULE> remoteImageBaseResult =
+          GetProcessExeModule(mRemoteProcess);
+      if (remoteImageBaseResult.isErr()) {
+        return remoteImageBaseResult.propagateErr();
+      }
+
+      mRemoteImagebase =
+          reinterpret_cast<uint8_t*>(remoteImageBaseResult.unwrap());
+    }
+    return Ok();
+  }
+
+  template <typename T>
+  T* LocalExecToRemoteExec(T* aLocalAddress) const {
+    MOZ_ASSERT(mRemoteImagebase);
+    MOZ_ASSERT(mLocalExec.IsWithinImage(aLocalAddress));
+
+    if (!mRemoteImagebase || !mLocalExec.IsWithinImage(aLocalAddress)) {
+      return aLocalAddress;
+    }
+
+    uintptr_t offset = reinterpret_cast<uintptr_t>(aLocalAddress) -
+                       reinterpret_cast<uintptr_t>(mLocalImagebase);
+    return reinterpret_cast<T*>(mRemoteImagebase + offset);
+  }
+
+ public:
+  explicit CrossExecTransferManager(HANDLE aRemoteProcess)
+      : mRemoteProcess(aRemoteProcess),
+        mLocalImagebase(
+            PEHeaders::HModuleToBaseAddr<uint8_t*>(GetLocalExecModule())),
+        mLocalExec(mLocalImagebase),
+        mRemoteImagebase(nullptr) {}
+
+  CrossExecTransferManager(HANDLE aRemoteProcess, HMODULE aLocalImagebase)
+      : mRemoteProcess(aRemoteProcess),
+        mLocalImagebase(
+            PEHeaders::HModuleToBaseAddr<uint8_t*>(aLocalImagebase)),
+        mLocalExec(mLocalImagebase),
+        mRemoteImagebase(nullptr) {}
+
+  explicit operator bool() const { return !!mLocalExec; }
+  HANDLE RemoteProcess() const { return mRemoteProcess; }
+  const PEHeaders& LocalPEHeaders() const { return mLocalExec; }
+
+  AutoVirtualProtect Protect(void* aLocalAddress, size_t aLength,
+                             DWORD aProtFlags) {
+    // If EnsureRemoteImagebase() fails, a subsequent operaion will fail.
+    Unused << EnsureRemoteImagebase();
+    return AutoVirtualProtect(LocalExecToRemoteExec(aLocalAddress), aLength,
+                              aProtFlags, mRemoteProcess);
+  }
+
+  LauncherVoidResult Transfer(LPVOID aDestinationAddress,
+                              LPCVOID aBufferToWrite, SIZE_T aBufferSize) {
+    LauncherVoidResult result = EnsureRemoteImagebase();
+    if (result.isErr()) {
+      return result.propagateErr();
+    }
+
+    if (!::WriteProcessMemory(mRemoteProcess,
+                              LocalExecToRemoteExec(aDestinationAddress),
+                              aBufferToWrite, aBufferSize, nullptr)) {
+      return LAUNCHER_ERROR_FROM_LAST();
+    }
+
+    return Ok();
+  }
+};
+
+#if !defined(MOZILLA_INTERNAL_API)
+
+inline LauncherResult<HMODULE> GetModuleHandleFromLeafName(
+    const UNICODE_STRING& aTarget) {
+  auto maybePeb = nt::GetProcessPebPtr(kCurrentProcess);
+  if (maybePeb.isErr()) {
+    return maybePeb.propagateErr();
+  }
+
+  const PPEB peb = reinterpret_cast<PPEB>(maybePeb.unwrap());
+  if (!peb->Ldr) {
+    return LAUNCHER_ERROR_FROM_WIN32(ERROR_BAD_EXE_FORMAT);
+  }
+
+  auto firstItem = &peb->Ldr->InMemoryOrderModuleList;
+  for (auto p = firstItem->Flink; p != firstItem; p = p->Flink) {
+    const auto currentTableEntry =
+        CONTAINING_RECORD(p, LDR_DATA_TABLE_ENTRY, InMemoryOrderLinks);
+
+    UNICODE_STRING leafName;
+    nt::GetLeafName(&leafName, &currentTableEntry->FullDllName);
+
+    if (::RtlCompareUnicodeString(&leafName, &aTarget, TRUE) == 0) {
+      return reinterpret_cast<HMODULE>(currentTableEntry->DllBase);
+    }
+  }
+
+  return LAUNCHER_ERROR_FROM_WIN32(ERROR_MOD_NOT_FOUND);
+}
+
+class MOZ_ONLY_USED_TO_AVOID_STATIC_CONSTRUCTORS SRWLock final {
+ public:
+  constexpr SRWLock() : mLock(SRWLOCK_INIT) {}
+
+  void LockShared() { ::RtlAcquireSRWLockShared(&mLock); }
+
+  void LockExclusive() { ::RtlAcquireSRWLockExclusive(&mLock); }
+
+  void UnlockShared() { ::RtlReleaseSRWLockShared(&mLock); }
+
+  void UnlockExclusive() { ::RtlReleaseSRWLockExclusive(&mLock); }
+
+  SRWLock(const SRWLock&) = delete;
+  SRWLock(SRWLock&&) = delete;
+  SRWLock& operator=(const SRWLock&) = delete;
+  SRWLock& operator=(SRWLock&&) = delete;
+
+  SRWLOCK* operator&() { return &mLock; }
+
+ private:
+  SRWLOCK mLock;
+};
+
+class MOZ_RAII AutoExclusiveLock final {
+ public:
+  explicit AutoExclusiveLock(SRWLock& aLock) : mLock(aLock) {
+    aLock.LockExclusive();
+  }
+
+  ~AutoExclusiveLock() { mLock.UnlockExclusive(); }
+
+  AutoExclusiveLock(const AutoExclusiveLock&) = delete;
+  AutoExclusiveLock(AutoExclusiveLock&&) = delete;
+  AutoExclusiveLock& operator=(const AutoExclusiveLock&) = delete;
+  AutoExclusiveLock& operator=(AutoExclusiveLock&&) = delete;
+
+ private:
+  SRWLock& mLock;
+};
+
+class MOZ_RAII AutoSharedLock final {
+ public:
+  explicit AutoSharedLock(SRWLock& aLock) : mLock(aLock) { aLock.LockShared(); }
+
+  ~AutoSharedLock() { mLock.UnlockShared(); }
+
+  AutoSharedLock(const AutoSharedLock&) = delete;
+  AutoSharedLock(AutoSharedLock&&) = delete;
+  AutoSharedLock& operator=(const AutoSharedLock&) = delete;
+  AutoSharedLock& operator=(AutoSharedLock&&) = delete;
+
+ private:
+  SRWLock& mLock;
+};
+
+#endif  // !defined(MOZILLA_INTERNAL_API)
+
+class RtlAllocPolicy {
+ public:
+  template <typename T>
+  T* maybe_pod_malloc(size_t aNumElems) {
+    if (aNumElems & mozilla::tl::MulOverflowMask<sizeof(T)>::value) {
+      return nullptr;
+    }
+
+    return static_cast<T*>(
+        ::RtlAllocateHeap(RtlGetProcessHeap(), 0, aNumElems * sizeof(T)));
+  }
+
+  template <typename T>
+  T* maybe_pod_calloc(size_t aNumElems) {
+    if (aNumElems & mozilla::tl::MulOverflowMask<sizeof(T)>::value) {
+      return nullptr;
+    }
+
+    return static_cast<T*>(::RtlAllocateHeap(
+        RtlGetProcessHeap(), HEAP_ZERO_MEMORY, aNumElems * sizeof(T)));
+  }
+
+  template <typename T>
+  T* maybe_pod_realloc(T* aPtr, size_t aOldSize, size_t aNewSize) {
+    if (aNewSize & mozilla::tl::MulOverflowMask<sizeof(T)>::value) {
+      return nullptr;
+    }
+
+    return static_cast<T*>(::RtlReAllocateHeap(RtlGetProcessHeap(), 0, aPtr,
+                                               aNewSize * sizeof(T)));
+  }
+
+  template <typename T>
+  T* pod_malloc(size_t aNumElems) {
+    return maybe_pod_malloc<T>(aNumElems);
+  }
+
+  template <typename T>
+  T* pod_calloc(size_t aNumElems) {
+    return maybe_pod_calloc<T>(aNumElems);
+  }
+
+  template <typename T>
+  T* pod_realloc(T* aPtr, size_t aOldSize, size_t aNewSize) {
+    return maybe_pod_realloc<T>(aPtr, aOldSize, aNewSize);
+  }
+
+  template <typename T>
+  void free_(T* aPtr, size_t aNumElems = 0) {
+    ::RtlFreeHeap(RtlGetProcessHeap(), 0, aPtr);
+  }
+
+  void reportAllocOverflow() const {}
+
+  [[nodiscard]] bool checkSimulatedOOM() const { return true; }
+};
+
+class AutoMappedView final {
+  void* mView;
+
+  void Unmap() {
+    if (!mView) {
+      return;
+    }
+
+#if defined(MOZILLA_INTERNAL_API)
+    ::UnmapViewOfFile(mView);
+#else
+    NTSTATUS status = ::NtUnmapViewOfSection(nt::kCurrentProcess, mView);
+    if (!NT_SUCCESS(status)) {
+      ::RtlSetLastWin32Error(::RtlNtStatusToDosError(status));
+    }
+#endif
+    mView = nullptr;
+  }
+
+ public:
+  explicit AutoMappedView(void* aView) : mView(aView) {}
+
+  AutoMappedView(HANDLE aSection, ULONG aProtectionFlags) : mView(nullptr) {
+#if defined(MOZILLA_INTERNAL_API)
+    mView = ::MapViewOfFile(aSection, aProtectionFlags, 0, 0, 0);
+#else
+    SIZE_T viewSize = 0;
+    NTSTATUS status = ::NtMapViewOfSection(aSection, nt::kCurrentProcess,
+                                           &mView, 0, 0, nullptr, &viewSize,
+                                           ViewUnmap, 0, aProtectionFlags);
+    if (!NT_SUCCESS(status)) {
+      ::RtlSetLastWin32Error(::RtlNtStatusToDosError(status));
+    }
+#endif
+  }
+  ~AutoMappedView() { Unmap(); }
+
+  // Allow move & Disallow copy
+  AutoMappedView(AutoMappedView&& aOther) : mView(aOther.mView) {
+    aOther.mView = nullptr;
+  }
+  AutoMappedView& operator=(AutoMappedView&& aOther) {
+    if (this != &aOther) {
+      Unmap();
+      mView = aOther.mView;
+      aOther.mView = nullptr;
+    }
+    return *this;
+  }
+  AutoMappedView(const AutoMappedView&) = delete;
+  AutoMappedView& operator=(const AutoMappedView&) = delete;
+
+  explicit operator bool() const { return !!mView; }
+  template <typename T>
+  T* as() {
+    return reinterpret_cast<T*>(mView);
+  }
+
+  void* release() {
+    void* p = mView;
+    mView = nullptr;
+    return p;
+  }
+};
+
+}  // namespace nt
+}  // namespace mozilla
+
+#endif  // mozilla_NativeNt_h