summaryrefslogtreecommitdiffstats
path: root/memory/replace/dmd
diff options
context:
space:
mode:
Diffstat (limited to 'memory/replace/dmd')
-rw-r--r--memory/replace/dmd/DMD.cpp1884
-rw-r--r--memory/replace/dmd/DMD.h291
-rw-r--r--memory/replace/dmd/README3
-rw-r--r--memory/replace/dmd/block_analyzer.py292
-rwxr-xr-xmemory/replace/dmd/dmd.py1028
-rw-r--r--memory/replace/dmd/moz.build37
-rw-r--r--memory/replace/dmd/test/SmokeDMD.cpp378
-rw-r--r--memory/replace/dmd/test/basic-scan-32-expected.txt25
-rw-r--r--memory/replace/dmd/test/basic-scan-64-expected.txt25
-rw-r--r--memory/replace/dmd/test/complete-empty-cumulative-expected.txt18
-rw-r--r--memory/replace/dmd/test/complete-empty-dark-matter-expected.txt29
-rw-r--r--memory/replace/dmd/test/complete-empty-live-expected.txt18
-rw-r--r--memory/replace/dmd/test/complete-full1-dark-matter-expected.txt265
-rw-r--r--memory/replace/dmd/test/complete-full1-live-expected.txt127
-rw-r--r--memory/replace/dmd/test/complete-full2-cumulative-expected.txt173
-rw-r--r--memory/replace/dmd/test/complete-full2-dark-matter-expected.txt140
-rw-r--r--memory/replace/dmd/test/complete-partial-live-expected.txt56
-rw-r--r--memory/replace/dmd/test/moz.build26
-rw-r--r--memory/replace/dmd/test/scan-test.py102
-rw-r--r--memory/replace/dmd/test/script-diff-dark-matter-expected.txt127
-rw-r--r--memory/replace/dmd/test/script-diff-dark-matter1.json51
-rw-r--r--memory/replace/dmd/test/script-diff-dark-matter2.json51
-rw-r--r--memory/replace/dmd/test/script-diff-live-expected.txt81
-rw-r--r--memory/replace/dmd/test/script-diff-live1.json51
-rw-r--r--memory/replace/dmd/test/script-diff-live2.json53
-rw-r--r--memory/replace/dmd/test/script-ignore-alloc-fns-expected.txt72
-rw-r--r--memory/replace/dmd/test/script-ignore-alloc-fns.json45
-rw-r--r--memory/replace/dmd/test/script-max-frames-1-expected.txt26
-rw-r--r--memory/replace/dmd/test/script-max-frames-3-expected.txt48
-rw-r--r--memory/replace/dmd/test/script-max-frames-8-expected.txt69
-rw-r--r--memory/replace/dmd/test/script-max-frames.json43
-rw-r--r--memory/replace/dmd/test/script-sort-by-num-blocks-expected.txt46
-rw-r--r--memory/replace/dmd/test/script-sort-by-req-expected.txt46
-rw-r--r--memory/replace/dmd/test/script-sort-by-slop-expected.txt46
-rw-r--r--memory/replace/dmd/test/script-sort-by-usable-expected.txt46
-rw-r--r--memory/replace/dmd/test/script-sort-by.json.gzbin0 -> 272 bytes
-rw-r--r--memory/replace/dmd/test/test_dmd.js232
-rw-r--r--memory/replace/dmd/test/xpcshell.toml35
38 files changed, 6085 insertions, 0 deletions
diff --git a/memory/replace/dmd/DMD.cpp b/memory/replace/dmd/DMD.cpp
new file mode 100644
index 0000000000..54a154e60e
--- /dev/null
+++ b/memory/replace/dmd/DMD.cpp
@@ -0,0 +1,1884 @@
+/* -*- 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 <ctype.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if !defined(MOZ_PROFILING)
+# error "DMD requires MOZ_PROFILING"
+#endif
+
+#ifdef XP_WIN
+# include <windows.h>
+# include <process.h>
+#else
+# include <pthread.h>
+# include <sys/types.h>
+# include <unistd.h>
+#endif
+
+#ifdef ANDROID
+# include <android/log.h>
+#endif
+
+#include "nscore.h"
+
+#include "mozilla/Assertions.h"
+#include "mozilla/FastBernoulliTrial.h"
+#include "mozilla/HashFunctions.h"
+#include "mozilla/HashTable.h"
+#include "mozilla/IntegerPrintfMacros.h"
+#include "mozilla/JSONWriter.h"
+#include "mozilla/Likely.h"
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/PodOperations.h"
+#include "mozilla/StackWalk.h"
+#include "mozilla/ThreadLocal.h"
+
+// CodeAddressService is defined entirely in the header, so this does not make
+// DMD depend on XPCOM's object file.
+#include "CodeAddressService.h"
+
+// replace_malloc.h needs to be included before replace_malloc_bridge.h,
+// which DMD.h includes, so DMD.h needs to be included after replace_malloc.h.
+#include "replace_malloc.h"
+#include "DMD.h"
+
+namespace mozilla {
+namespace dmd {
+
+class DMDBridge : public ReplaceMallocBridge {
+ virtual DMDFuncs* GetDMDFuncs() override;
+};
+
+static DMDBridge* gDMDBridge;
+static DMDFuncs gDMDFuncs;
+
+DMDFuncs* DMDBridge::GetDMDFuncs() { return &gDMDFuncs; }
+
+MOZ_FORMAT_PRINTF(1, 2)
+inline void StatusMsg(const char* aFmt, ...) {
+ va_list ap;
+ va_start(ap, aFmt);
+ gDMDFuncs.StatusMsg(aFmt, ap);
+ va_end(ap);
+}
+
+//---------------------------------------------------------------------------
+// Utilities
+//---------------------------------------------------------------------------
+
+#ifndef DISALLOW_COPY_AND_ASSIGN
+# define DISALLOW_COPY_AND_ASSIGN(T) \
+ T(const T&); \
+ void operator=(const T&)
+#endif
+
+static malloc_table_t gMallocTable;
+
+// This provides infallible allocations (they abort on OOM). We use it for all
+// of DMD's own allocations, which fall into the following three cases.
+//
+// - Direct allocations (the easy case).
+//
+// - Indirect allocations in mozilla::{Vector,HashSet,HashMap} -- this class
+// serves as their AllocPolicy.
+//
+// - Other indirect allocations (e.g. MozStackWalk) -- see the comments on
+// Thread::mBlockIntercepts and in replace_malloc for how these work.
+//
+// It would be nice if we could use the InfallibleAllocPolicy from mozalloc,
+// but DMD cannot use mozalloc.
+//
+class InfallibleAllocPolicy {
+ static void ExitOnFailure(const void* aP);
+
+ public:
+ template <typename T>
+ static T* maybe_pod_malloc(size_t aNumElems) {
+ if (aNumElems & mozilla::tl::MulOverflowMask<sizeof(T)>::value)
+ return nullptr;
+ return (T*)gMallocTable.malloc(aNumElems * sizeof(T));
+ }
+
+ template <typename T>
+ static T* maybe_pod_calloc(size_t aNumElems) {
+ return (T*)gMallocTable.calloc(aNumElems, sizeof(T));
+ }
+
+ template <typename T>
+ static T* maybe_pod_realloc(T* aPtr, size_t aOldSize, size_t aNewSize) {
+ if (aNewSize & mozilla::tl::MulOverflowMask<sizeof(T)>::value)
+ return nullptr;
+ return (T*)gMallocTable.realloc(aPtr, aNewSize * sizeof(T));
+ }
+
+ static void* malloc_(size_t aSize) {
+ void* p = gMallocTable.malloc(aSize);
+ ExitOnFailure(p);
+ return p;
+ }
+
+ template <typename T>
+ static T* pod_malloc(size_t aNumElems) {
+ T* p = maybe_pod_malloc<T>(aNumElems);
+ ExitOnFailure(p);
+ return p;
+ }
+
+ static void* calloc_(size_t aCount, size_t aSize) {
+ void* p = gMallocTable.calloc(aCount, aSize);
+ ExitOnFailure(p);
+ return p;
+ }
+
+ template <typename T>
+ static T* pod_calloc(size_t aNumElems) {
+ T* p = maybe_pod_calloc<T>(aNumElems);
+ ExitOnFailure(p);
+ return p;
+ }
+
+ static void* realloc_(void* aPtr, size_t aNewSize) {
+ void* p = gMallocTable.realloc(aPtr, aNewSize);
+ ExitOnFailure(p);
+ return p;
+ }
+
+ template <typename T>
+ static T* pod_realloc(T* aPtr, size_t aOldSize, size_t aNewSize) {
+ T* p = maybe_pod_realloc(aPtr, aOldSize, aNewSize);
+ ExitOnFailure(p);
+ return p;
+ }
+
+ static void* memalign_(size_t aAlignment, size_t aSize) {
+ void* p = gMallocTable.memalign(aAlignment, aSize);
+ ExitOnFailure(p);
+ return p;
+ }
+
+ template <typename T>
+ static void free_(T* aPtr, size_t aSize = 0) {
+ gMallocTable.free(aPtr);
+ }
+
+ static char* strdup_(const char* aStr) {
+ char* s = (char*)InfallibleAllocPolicy::malloc_(strlen(aStr) + 1);
+ strcpy(s, aStr);
+ return s;
+ }
+
+ template <class T>
+ static T* new_() {
+ void* mem = malloc_(sizeof(T));
+ return new (mem) T;
+ }
+
+ template <class T, typename P1>
+ static T* new_(const P1& aP1) {
+ void* mem = malloc_(sizeof(T));
+ return new (mem) T(aP1);
+ }
+
+ template <class T>
+ static void delete_(T* aPtr) {
+ if (aPtr) {
+ aPtr->~T();
+ InfallibleAllocPolicy::free_(aPtr);
+ }
+ }
+
+ static void reportAllocOverflow() { ExitOnFailure(nullptr); }
+ bool checkSimulatedOOM() const { return true; }
+};
+
+// This is only needed because of the |const void*| vs |void*| arg mismatch.
+static size_t MallocSizeOf(const void* aPtr) {
+ return gMallocTable.malloc_usable_size(const_cast<void*>(aPtr));
+}
+
+void DMDFuncs::StatusMsg(const char* aFmt, va_list aAp) {
+#ifdef ANDROID
+ __android_log_vprint(ANDROID_LOG_INFO, "DMD", aFmt, aAp);
+#else
+ // The +64 is easily enough for the "DMD[<pid>] " prefix and the NUL.
+ size_t size = strlen(aFmt) + 64;
+ char* fmt = (char*)InfallibleAllocPolicy::malloc_(size);
+ snprintf(fmt, size, "DMD[%d] %s", getpid(), aFmt);
+ vfprintf(stderr, fmt, aAp);
+ InfallibleAllocPolicy::free_(fmt);
+#endif
+}
+
+/* static */
+void InfallibleAllocPolicy::ExitOnFailure(const void* aP) {
+ if (!aP) {
+ MOZ_CRASH("DMD out of memory; aborting");
+ }
+}
+
+static double Percent(size_t part, size_t whole) {
+ return (whole == 0) ? 0 : 100 * (double)part / whole;
+}
+
+// Commifies the number.
+static char* Show(size_t n, char* buf, size_t buflen) {
+ int nc = 0, i = 0, lasti = buflen - 2;
+ buf[lasti + 1] = '\0';
+ if (n == 0) {
+ buf[lasti - i] = '0';
+ i++;
+ } else {
+ while (n > 0) {
+ if (((i - nc) % 3) == 0 && i != 0) {
+ buf[lasti - i] = ',';
+ i++;
+ nc++;
+ }
+ buf[lasti - i] = static_cast<char>((n % 10) + '0');
+ i++;
+ n /= 10;
+ }
+ }
+ int firstCharIndex = lasti - i + 1;
+
+ MOZ_ASSERT(firstCharIndex >= 0);
+ return &buf[firstCharIndex];
+}
+
+//---------------------------------------------------------------------------
+// Options (Part 1)
+//---------------------------------------------------------------------------
+
+class Options {
+ template <typename T>
+ struct NumOption {
+ const T mDefault;
+ const T mMax;
+ T mActual;
+ NumOption(T aDefault, T aMax)
+ : mDefault(aDefault), mMax(aMax), mActual(aDefault) {}
+ };
+
+ // DMD has several modes. These modes affect what data is recorded and
+ // written to the output file, and the written data affects the
+ // post-processing that dmd.py can do.
+ //
+ // Users specify the mode as soon as DMD starts. This leads to minimal memory
+ // usage and log file size. It has the disadvantage that is inflexible -- if
+ // you want to change modes you have to re-run DMD. But in practice changing
+ // modes seems to be rare, so it's not much of a problem.
+ //
+ // An alternative possibility would be to always record and output *all* the
+ // information needed for all modes. This would let you choose the mode when
+ // running dmd.py, and so you could do multiple kinds of profiling on a
+ // single DMD run. But if you are only interested in one of the simpler
+ // modes, you'd pay the price of (a) increased memory usage and (b) *very*
+ // large log files.
+ //
+ // Finally, another alternative possibility would be to do mode selection
+ // partly at DMD startup or recording, and then partly in dmd.py. This would
+ // give some extra flexibility at moderate memory and file size cost. But
+ // certain mode pairs wouldn't work, which would be confusing.
+ //
+ enum class Mode {
+ // For each live block, this mode outputs: size (usable and slop) and
+ // (possibly) and allocation stack. This mode is good for live heap
+ // profiling.
+ Live,
+
+ // Like "Live", but for each live block it also outputs: zero or more
+ // report stacks. This mode is good for identifying where memory reporters
+ // should be added. This is the default mode.
+ DarkMatter,
+
+ // Like "Live", but also outputs the same data for dead blocks. This mode
+ // does cumulative heap profiling, which is good for identifying where large
+ // amounts of short-lived allocations ("heap churn") occur.
+ Cumulative,
+
+ // Like "Live", but this mode also outputs for each live block the address
+ // of the block and the values contained in the blocks. This mode is useful
+ // for investigating leaks, by helping to figure out which blocks refer to
+ // other blocks. This mode force-enables full stacks coverage.
+ Scan
+ };
+
+ // With full stacks, every heap block gets a stack trace recorded for it.
+ // This is complete but slow.
+ //
+ // With partial stacks, not all heap blocks will get a stack trace recorded.
+ // A Bernoulli trial (see mfbt/FastBernoulliTrial.h for details) is performed
+ // for each heap block to decide if it gets one. Because bigger heap blocks
+ // are more likely to get a stack trace, even though most heap *blocks* won't
+ // get a stack trace, most heap *bytes* will.
+ enum class Stacks { Full, Partial };
+
+ char* mDMDEnvVar; // a saved copy, for later printing
+
+ Mode mMode;
+ Stacks mStacks;
+ bool mShowDumpStats;
+
+ void BadArg(const char* aArg);
+ static const char* ValueIfMatch(const char* aArg, const char* aOptionName);
+ static bool GetLong(const char* aArg, const char* aOptionName, long aMin,
+ long aMax, long* aValue);
+ static bool GetBool(const char* aArg, const char* aOptionName, bool* aValue);
+
+ public:
+ explicit Options(const char* aDMDEnvVar);
+
+ bool IsLiveMode() const { return mMode == Mode::Live; }
+ bool IsDarkMatterMode() const { return mMode == Mode::DarkMatter; }
+ bool IsCumulativeMode() const { return mMode == Mode::Cumulative; }
+ bool IsScanMode() const { return mMode == Mode::Scan; }
+
+ const char* ModeString() const;
+
+ const char* DMDEnvVar() const { return mDMDEnvVar; }
+
+ bool DoFullStacks() const { return mStacks == Stacks::Full; }
+ size_t ShowDumpStats() const { return mShowDumpStats; }
+};
+
+static Options* gOptions;
+
+//---------------------------------------------------------------------------
+// The global lock
+//---------------------------------------------------------------------------
+
+// MutexBase implements the platform-specific parts of a mutex.
+
+#ifdef XP_WIN
+
+class MutexBase {
+ CRITICAL_SECTION mCS;
+
+ DISALLOW_COPY_AND_ASSIGN(MutexBase);
+
+ public:
+ MutexBase() { InitializeCriticalSection(&mCS); }
+ ~MutexBase() { DeleteCriticalSection(&mCS); }
+
+ void Lock() { EnterCriticalSection(&mCS); }
+ void Unlock() { LeaveCriticalSection(&mCS); }
+};
+
+#else
+
+class MutexBase {
+ pthread_mutex_t mMutex;
+
+ MutexBase(const MutexBase&) = delete;
+
+ const MutexBase& operator=(const MutexBase&) = delete;
+
+ public:
+ MutexBase() { pthread_mutex_init(&mMutex, nullptr); }
+
+ void Lock() { pthread_mutex_lock(&mMutex); }
+ void Unlock() { pthread_mutex_unlock(&mMutex); }
+};
+
+#endif
+
+class Mutex : private MutexBase {
+ bool mIsLocked;
+
+ Mutex(const Mutex&) = delete;
+
+ const Mutex& operator=(const Mutex&) = delete;
+
+ public:
+ Mutex() : mIsLocked(false) {}
+
+ void Lock() {
+ MutexBase::Lock();
+ MOZ_ASSERT(!mIsLocked);
+ mIsLocked = true;
+ }
+
+ void Unlock() {
+ MOZ_ASSERT(mIsLocked);
+ mIsLocked = false;
+ MutexBase::Unlock();
+ }
+
+ bool IsLocked() { return mIsLocked; }
+};
+
+// This lock must be held while manipulating global state such as
+// gStackTraceTable, gLiveBlockTable, gDeadBlockTable. Note that gOptions is
+// *not* protected by this lock because it is only written to by Options(),
+// which is only invoked at start-up and in ResetEverything(), which is only
+// used by SmokeDMD.cpp.
+static Mutex* gStateLock = nullptr;
+
+class AutoLockState {
+ AutoLockState(const AutoLockState&) = delete;
+
+ const AutoLockState& operator=(const AutoLockState&) = delete;
+
+ public:
+ AutoLockState() { gStateLock->Lock(); }
+ ~AutoLockState() { gStateLock->Unlock(); }
+};
+
+class AutoUnlockState {
+ AutoUnlockState(const AutoUnlockState&) = delete;
+
+ const AutoUnlockState& operator=(const AutoUnlockState&) = delete;
+
+ public:
+ AutoUnlockState() { gStateLock->Unlock(); }
+ ~AutoUnlockState() { gStateLock->Lock(); }
+};
+
+//---------------------------------------------------------------------------
+// Per-thread blocking of intercepts
+//---------------------------------------------------------------------------
+
+// On MacOS, the first __thread/thread_local access calls malloc, which leads
+// to an infinite loop. So we use pthread-based TLS instead, which somehow
+// doesn't have this problem.
+#if !defined(XP_DARWIN)
+# define DMD_THREAD_LOCAL(T) MOZ_THREAD_LOCAL(T)
+#else
+# define DMD_THREAD_LOCAL(T) \
+ detail::ThreadLocal<T, detail::ThreadLocalKeyStorage>
+#endif
+
+class Thread {
+ // Required for allocation via InfallibleAllocPolicy::new_.
+ friend class InfallibleAllocPolicy;
+
+ // When true, this blocks intercepts, which allows malloc interception
+ // functions to themselves call malloc. (Nb: for direct calls to malloc we
+ // can just use InfallibleAllocPolicy::{malloc_,new_}, but we sometimes
+ // indirectly call vanilla malloc via functions like MozStackWalk.)
+ bool mBlockIntercepts;
+
+ Thread() : mBlockIntercepts(false) {}
+
+ Thread(const Thread&) = delete;
+
+ const Thread& operator=(const Thread&) = delete;
+
+ static DMD_THREAD_LOCAL(Thread*) tlsThread;
+
+ public:
+ static void Init() {
+ if (!tlsThread.init()) {
+ MOZ_CRASH();
+ }
+ }
+
+ static Thread* Fetch() {
+ Thread* t = tlsThread.get();
+ if (MOZ_UNLIKELY(!t)) {
+ // This memory is never freed, even if the thread dies. It's a leak, but
+ // only a tiny one.
+ t = InfallibleAllocPolicy::new_<Thread>();
+ tlsThread.set(t);
+ }
+
+ return t;
+ }
+
+ bool BlockIntercepts() {
+ MOZ_ASSERT(!mBlockIntercepts);
+ return mBlockIntercepts = true;
+ }
+
+ bool UnblockIntercepts() {
+ MOZ_ASSERT(mBlockIntercepts);
+ return mBlockIntercepts = false;
+ }
+
+ bool InterceptsAreBlocked() const { return mBlockIntercepts; }
+};
+
+DMD_THREAD_LOCAL(Thread*) Thread::tlsThread;
+
+// An object of this class must be created (on the stack) before running any
+// code that might allocate.
+class AutoBlockIntercepts {
+ Thread* const mT;
+
+ AutoBlockIntercepts(const AutoBlockIntercepts&) = delete;
+
+ const AutoBlockIntercepts& operator=(const AutoBlockIntercepts&) = delete;
+
+ public:
+ explicit AutoBlockIntercepts(Thread* aT) : mT(aT) { mT->BlockIntercepts(); }
+ ~AutoBlockIntercepts() {
+ MOZ_ASSERT(mT->InterceptsAreBlocked());
+ mT->UnblockIntercepts();
+ }
+};
+
+//---------------------------------------------------------------------------
+// Location service
+//---------------------------------------------------------------------------
+
+struct DescribeCodeAddressLock {
+ static void Unlock() { gStateLock->Unlock(); }
+ static void Lock() { gStateLock->Lock(); }
+ static bool IsLocked() { return gStateLock->IsLocked(); }
+};
+
+typedef CodeAddressService<InfallibleAllocPolicy, DescribeCodeAddressLock>
+ CodeAddressService;
+
+//---------------------------------------------------------------------------
+// Stack traces
+//---------------------------------------------------------------------------
+
+class StackTrace {
+ public:
+ static const uint32_t MaxFrames = 24;
+
+ private:
+ uint32_t mLength; // The number of PCs.
+ const void* mPcs[MaxFrames]; // The PCs themselves.
+
+ public:
+ StackTrace() : mLength(0) {}
+ StackTrace(const StackTrace& aOther) : mLength(aOther.mLength) {
+ PodCopy(mPcs, aOther.mPcs, mLength);
+ }
+
+ uint32_t Length() const { return mLength; }
+ const void* Pc(uint32_t i) const {
+ MOZ_ASSERT(i < mLength);
+ return mPcs[i];
+ }
+
+ uint32_t Size() const { return mLength * sizeof(mPcs[0]); }
+
+ // The stack trace returned by this function is interned in gStackTraceTable,
+ // and so is immortal and unmovable.
+ static const StackTrace* Get(Thread* aT);
+
+ // Hash policy.
+
+ typedef StackTrace* Lookup;
+
+ static mozilla::HashNumber hash(const StackTrace* const& aSt) {
+ return mozilla::HashBytes(aSt->mPcs, aSt->Size());
+ }
+
+ static bool match(const StackTrace* const& aA, const StackTrace* const& aB) {
+ return aA->mLength == aB->mLength &&
+ memcmp(aA->mPcs, aB->mPcs, aA->Size()) == 0;
+ }
+
+ private:
+ static void StackWalkCallback(uint32_t aFrameNumber, void* aPc, void* aSp,
+ void* aClosure) {
+ StackTrace* st = (StackTrace*)aClosure;
+ MOZ_ASSERT(st->mLength < MaxFrames);
+ st->mPcs[st->mLength] = aPc;
+ st->mLength++;
+ MOZ_ASSERT(st->mLength == aFrameNumber);
+ }
+};
+
+typedef mozilla::HashSet<StackTrace*, StackTrace, InfallibleAllocPolicy>
+ StackTraceTable;
+static StackTraceTable* gStackTraceTable = nullptr;
+
+typedef mozilla::HashSet<const StackTrace*,
+ mozilla::DefaultHasher<const StackTrace*>,
+ InfallibleAllocPolicy>
+ StackTraceSet;
+
+typedef mozilla::HashSet<const void*, mozilla::DefaultHasher<const void*>,
+ InfallibleAllocPolicy>
+ PointerSet;
+typedef mozilla::HashMap<const void*, uint32_t,
+ mozilla::DefaultHasher<const void*>,
+ InfallibleAllocPolicy>
+ PointerIdMap;
+
+// We won't GC the stack trace table until it this many elements.
+static uint32_t gGCStackTraceTableWhenSizeExceeds = 4 * 1024;
+
+/* static */ const StackTrace* StackTrace::Get(Thread* aT) {
+ MOZ_ASSERT(gStateLock->IsLocked());
+ MOZ_ASSERT(aT->InterceptsAreBlocked());
+
+ // On Windows, MozStackWalk can acquire a lock from the shared library
+ // loader. Another thread might call malloc while holding that lock (when
+ // loading a shared library). So we can't be in gStateLock during the call
+ // to MozStackWalk. For details, see
+ // https://bugzilla.mozilla.org/show_bug.cgi?id=374829#c8
+ // On Linux, something similar can happen; see bug 824340.
+ // So let's just release it on all platforms.
+ StackTrace tmp;
+ {
+ AutoUnlockState unlock;
+ // In each of the following cases, skipFrames is chosen so that the
+ // first frame in each stack trace is a replace_* function (or as close as
+ // possible, given the vagaries of inlining on different platforms).
+#if defined(XP_WIN) && defined(_M_IX86)
+ // This avoids MozStackWalk(), which causes unusably slow startup on Win32
+ // when it is called during static initialization (see bug 1241684).
+ //
+ // This code is cribbed from the Gecko Profiler, which also uses
+ // FramePointerStackWalk() on Win32: REGISTERS_SYNC_POPULATE() for the
+ // frame pointer, and GetStackTop() for the stack end.
+ CONTEXT context;
+ RtlCaptureContext(&context);
+ void** fp = reinterpret_cast<void**>(context.Ebp);
+
+ PNT_TIB pTib = reinterpret_cast<PNT_TIB>(NtCurrentTeb());
+ void* stackEnd = static_cast<void*>(pTib->StackBase);
+ FramePointerStackWalk(StackWalkCallback, MaxFrames, &tmp, fp, stackEnd);
+#elif defined(XP_MACOSX)
+ // This avoids MozStackWalk(), which has become unusably slow on Mac due to
+ // changes in libunwind.
+ //
+ // This code is cribbed from the Gecko Profiler, which also uses
+ // FramePointerStackWalk() on Mac: REGISTERS_SYNC_POPULATE() for the frame
+ // pointer, and GetStackTop() for the stack end.
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wframe-address"
+ void** fp = reinterpret_cast<void**>(__builtin_frame_address(1));
+# pragma GCC diagnostic pop
+ void* stackEnd = pthread_get_stackaddr_np(pthread_self());
+ FramePointerStackWalk(StackWalkCallback, MaxFrames, &tmp, fp, stackEnd);
+#else
+ MozStackWalk(StackWalkCallback, nullptr, MaxFrames, &tmp);
+#endif
+ }
+
+ StackTraceTable::AddPtr p = gStackTraceTable->lookupForAdd(&tmp);
+ if (!p) {
+ StackTrace* stnew = InfallibleAllocPolicy::new_<StackTrace>(tmp);
+ MOZ_ALWAYS_TRUE(gStackTraceTable->add(p, stnew));
+ }
+ return *p;
+}
+
+//---------------------------------------------------------------------------
+// Heap blocks
+//---------------------------------------------------------------------------
+
+// This class combines a 2-byte-aligned pointer (i.e. one whose bottom bit
+// is zero) with a 1-bit tag.
+//
+// |T| is the pointer type, e.g. |int*|, not the pointed-to type. This makes
+// is easier to have const pointers, e.g. |TaggedPtr<const int*>|.
+template <typename T>
+class TaggedPtr {
+ union {
+ T mPtr;
+ uintptr_t mUint;
+ };
+
+ static const uintptr_t kTagMask = uintptr_t(0x1);
+ static const uintptr_t kPtrMask = ~kTagMask;
+
+ static bool IsTwoByteAligned(T aPtr) {
+ return (uintptr_t(aPtr) & kTagMask) == 0;
+ }
+
+ public:
+ TaggedPtr() : mPtr(nullptr) {}
+
+ TaggedPtr(T aPtr, bool aBool) : mPtr(aPtr) {
+ MOZ_ASSERT(IsTwoByteAligned(aPtr));
+ uintptr_t tag = uintptr_t(aBool);
+ MOZ_ASSERT(tag <= kTagMask);
+ mUint |= (tag & kTagMask);
+ }
+
+ void Set(T aPtr, bool aBool) {
+ MOZ_ASSERT(IsTwoByteAligned(aPtr));
+ mPtr = aPtr;
+ uintptr_t tag = uintptr_t(aBool);
+ MOZ_ASSERT(tag <= kTagMask);
+ mUint |= (tag & kTagMask);
+ }
+
+ T Ptr() const { return reinterpret_cast<T>(mUint & kPtrMask); }
+
+ bool Tag() const { return bool(mUint & kTagMask); }
+};
+
+// A live heap block. Stores both basic data and data about reports, if we're
+// in DarkMatter mode.
+class LiveBlock {
+ const void* mPtr;
+ const size_t mReqSize; // size requested
+
+ // The stack trace where this block was allocated, or nullptr if we didn't
+ // record one.
+ const StackTrace* const mAllocStackTrace;
+
+ // This array has two elements because we record at most two reports of a
+ // block.
+ // - Ptr: |mReportStackTrace| - stack trace where this block was reported.
+ // nullptr if not reported.
+ // - Tag bit 0: |mReportedOnAlloc| - was the block reported immediately on
+ // allocation? If so, DMD must not clear the report at the end of
+ // Analyze(). Only relevant if |mReportStackTrace| is non-nullptr.
+ //
+ // |mPtr| is used as the key in LiveBlockTable, so it's ok for this member
+ // to be |mutable|.
+ //
+ // Only used in DarkMatter mode.
+ mutable TaggedPtr<const StackTrace*> mReportStackTrace_mReportedOnAlloc[2];
+
+ public:
+ LiveBlock(const void* aPtr, size_t aReqSize,
+ const StackTrace* aAllocStackTrace)
+ : mPtr(aPtr), mReqSize(aReqSize), mAllocStackTrace(aAllocStackTrace) {}
+
+ const void* Address() const { return mPtr; }
+
+ size_t ReqSize() const { return mReqSize; }
+
+ size_t SlopSize() const { return MallocSizeOf(mPtr) - mReqSize; }
+
+ const StackTrace* AllocStackTrace() const { return mAllocStackTrace; }
+
+ const StackTrace* ReportStackTrace1() const {
+ MOZ_ASSERT(gOptions->IsDarkMatterMode());
+ return mReportStackTrace_mReportedOnAlloc[0].Ptr();
+ }
+
+ const StackTrace* ReportStackTrace2() const {
+ MOZ_ASSERT(gOptions->IsDarkMatterMode());
+ return mReportStackTrace_mReportedOnAlloc[1].Ptr();
+ }
+
+ bool ReportedOnAlloc1() const {
+ MOZ_ASSERT(gOptions->IsDarkMatterMode());
+ return mReportStackTrace_mReportedOnAlloc[0].Tag();
+ }
+
+ bool ReportedOnAlloc2() const {
+ MOZ_ASSERT(gOptions->IsDarkMatterMode());
+ return mReportStackTrace_mReportedOnAlloc[1].Tag();
+ }
+
+ void AddStackTracesToTable(StackTraceSet& aStackTraces) const {
+ if (AllocStackTrace()) {
+ MOZ_ALWAYS_TRUE(aStackTraces.put(AllocStackTrace()));
+ }
+ if (gOptions->IsDarkMatterMode()) {
+ if (ReportStackTrace1()) {
+ MOZ_ALWAYS_TRUE(aStackTraces.put(ReportStackTrace1()));
+ }
+ if (ReportStackTrace2()) {
+ MOZ_ALWAYS_TRUE(aStackTraces.put(ReportStackTrace2()));
+ }
+ }
+ }
+
+ uint32_t NumReports() const {
+ MOZ_ASSERT(gOptions->IsDarkMatterMode());
+ if (ReportStackTrace2()) {
+ MOZ_ASSERT(ReportStackTrace1());
+ return 2;
+ }
+ if (ReportStackTrace1()) {
+ return 1;
+ }
+ return 0;
+ }
+
+ // This is |const| thanks to the |mutable| fields above.
+ void Report(Thread* aT, bool aReportedOnAlloc) const {
+ MOZ_ASSERT(gOptions->IsDarkMatterMode());
+ // We don't bother recording reports after the 2nd one.
+ uint32_t numReports = NumReports();
+ if (numReports < 2) {
+ mReportStackTrace_mReportedOnAlloc[numReports].Set(StackTrace::Get(aT),
+ aReportedOnAlloc);
+ }
+ }
+
+ void UnreportIfNotReportedOnAlloc() const {
+ MOZ_ASSERT(gOptions->IsDarkMatterMode());
+ if (!ReportedOnAlloc1() && !ReportedOnAlloc2()) {
+ mReportStackTrace_mReportedOnAlloc[0].Set(nullptr, 0);
+ mReportStackTrace_mReportedOnAlloc[1].Set(nullptr, 0);
+
+ } else if (!ReportedOnAlloc1() && ReportedOnAlloc2()) {
+ // Shift the 2nd report down to the 1st one.
+ mReportStackTrace_mReportedOnAlloc[0] =
+ mReportStackTrace_mReportedOnAlloc[1];
+ mReportStackTrace_mReportedOnAlloc[1].Set(nullptr, 0);
+
+ } else if (ReportedOnAlloc1() && !ReportedOnAlloc2()) {
+ mReportStackTrace_mReportedOnAlloc[1].Set(nullptr, 0);
+ }
+ }
+
+ // Hash policy.
+
+ typedef const void* Lookup;
+
+ static mozilla::HashNumber hash(const void* const& aPtr) {
+ return mozilla::HashGeneric(aPtr);
+ }
+
+ static bool match(const LiveBlock& aB, const void* const& aPtr) {
+ return aB.mPtr == aPtr;
+ }
+};
+
+// A table of live blocks where the lookup key is the block address.
+typedef mozilla::HashSet<LiveBlock, LiveBlock, InfallibleAllocPolicy>
+ LiveBlockTable;
+static LiveBlockTable* gLiveBlockTable = nullptr;
+
+class AggregatedLiveBlockHashPolicy {
+ public:
+ typedef const LiveBlock* const Lookup;
+
+ static mozilla::HashNumber hash(const LiveBlock* const& aB) {
+ return gOptions->IsDarkMatterMode()
+ ? mozilla::HashGeneric(
+ aB->ReqSize(), aB->SlopSize(), aB->AllocStackTrace(),
+ aB->ReportedOnAlloc1(), aB->ReportedOnAlloc2())
+ : mozilla::HashGeneric(aB->ReqSize(), aB->SlopSize(),
+ aB->AllocStackTrace());
+ }
+
+ static bool match(const LiveBlock* const& aA, const LiveBlock* const& aB) {
+ return gOptions->IsDarkMatterMode()
+ ? aA->ReqSize() == aB->ReqSize() &&
+ aA->SlopSize() == aB->SlopSize() &&
+ aA->AllocStackTrace() == aB->AllocStackTrace() &&
+ aA->ReportStackTrace1() == aB->ReportStackTrace1() &&
+ aA->ReportStackTrace2() == aB->ReportStackTrace2()
+ : aA->ReqSize() == aB->ReqSize() &&
+ aA->SlopSize() == aB->SlopSize() &&
+ aA->AllocStackTrace() == aB->AllocStackTrace();
+ }
+};
+
+// A table of live blocks where the lookup key is everything but the block
+// address. For aggregating similar live blocks at output time.
+typedef mozilla::HashMap<const LiveBlock*, size_t,
+ AggregatedLiveBlockHashPolicy, InfallibleAllocPolicy>
+ AggregatedLiveBlockTable;
+
+// A freed heap block.
+class DeadBlock {
+ const size_t mReqSize; // size requested
+ const size_t mSlopSize; // slop above size requested
+
+ // The stack trace where this block was allocated.
+ const StackTrace* const mAllocStackTrace;
+
+ public:
+ DeadBlock() : mReqSize(0), mSlopSize(0), mAllocStackTrace(nullptr) {}
+
+ explicit DeadBlock(const LiveBlock& aLb)
+ : mReqSize(aLb.ReqSize()),
+ mSlopSize(aLb.SlopSize()),
+ mAllocStackTrace(aLb.AllocStackTrace()) {}
+
+ ~DeadBlock() = default;
+
+ size_t ReqSize() const { return mReqSize; }
+ size_t SlopSize() const { return mSlopSize; }
+
+ const StackTrace* AllocStackTrace() const { return mAllocStackTrace; }
+
+ void AddStackTracesToTable(StackTraceSet& aStackTraces) const {
+ if (AllocStackTrace()) {
+ MOZ_ALWAYS_TRUE(aStackTraces.put(AllocStackTrace()));
+ }
+ }
+
+ // Hash policy.
+
+ typedef DeadBlock Lookup;
+
+ static mozilla::HashNumber hash(const DeadBlock& aB) {
+ return mozilla::HashGeneric(aB.ReqSize(), aB.SlopSize(),
+ aB.AllocStackTrace());
+ }
+
+ static bool match(const DeadBlock& aA, const DeadBlock& aB) {
+ return aA.ReqSize() == aB.ReqSize() && aA.SlopSize() == aB.SlopSize() &&
+ aA.AllocStackTrace() == aB.AllocStackTrace();
+ }
+};
+
+// For each unique DeadBlock value we store a count of how many actual dead
+// blocks have that value.
+typedef mozilla::HashMap<DeadBlock, size_t, DeadBlock, InfallibleAllocPolicy>
+ DeadBlockTable;
+static DeadBlockTable* gDeadBlockTable = nullptr;
+
+// Add the dead block to the dead block table, if that's appropriate.
+void MaybeAddToDeadBlockTable(const DeadBlock& aDb) {
+ if (gOptions->IsCumulativeMode() && aDb.AllocStackTrace()) {
+ AutoLockState lock;
+ if (DeadBlockTable::AddPtr p = gDeadBlockTable->lookupForAdd(aDb)) {
+ p->value() += 1;
+ } else {
+ MOZ_ALWAYS_TRUE(gDeadBlockTable->add(p, aDb, 1));
+ }
+ }
+}
+
+// Add a pointer to each live stack trace into the given StackTraceSet. (A
+// stack trace is live if it's used by one of the live blocks.)
+static void GatherUsedStackTraces(StackTraceSet& aStackTraces) {
+ MOZ_ASSERT(gStateLock->IsLocked());
+ MOZ_ASSERT(Thread::Fetch()->InterceptsAreBlocked());
+
+ aStackTraces.clear();
+ MOZ_ALWAYS_TRUE(aStackTraces.reserve(512));
+
+ for (auto iter = gLiveBlockTable->iter(); !iter.done(); iter.next()) {
+ iter.get().AddStackTracesToTable(aStackTraces);
+ }
+
+ for (auto iter = gDeadBlockTable->iter(); !iter.done(); iter.next()) {
+ iter.get().key().AddStackTracesToTable(aStackTraces);
+ }
+}
+
+// Delete stack traces that we aren't using, and compact our hashtable.
+static void GCStackTraces() {
+ MOZ_ASSERT(gStateLock->IsLocked());
+ MOZ_ASSERT(Thread::Fetch()->InterceptsAreBlocked());
+
+ StackTraceSet usedStackTraces;
+ GatherUsedStackTraces(usedStackTraces);
+
+ // Delete all unused stack traces from gStackTraceTable. The ModIterator
+ // destructor will automatically rehash and compact the table.
+ for (auto iter = gStackTraceTable->modIter(); !iter.done(); iter.next()) {
+ StackTrace* const& st = iter.get();
+ if (!usedStackTraces.has(st)) {
+ iter.remove();
+ InfallibleAllocPolicy::delete_(st);
+ }
+ }
+
+ // Schedule a GC when we have twice as many stack traces as we had right after
+ // this GC finished.
+ gGCStackTraceTableWhenSizeExceeds = 2 * gStackTraceTable->count();
+}
+
+//---------------------------------------------------------------------------
+// malloc/free callbacks
+//---------------------------------------------------------------------------
+
+static FastBernoulliTrial* gBernoulli;
+
+// In testing, a probability of 0.003 resulted in ~25% of heap blocks getting
+// a stack trace and ~80% of heap bytes getting a stack trace. (This is
+// possible because big heap blocks are more likely to get a stack trace.)
+//
+// We deliberately choose not to give the user control over this probability
+// (other than effectively setting it to 1 via --stacks=full) because it's
+// quite inscrutable and generally the user just wants "faster and imprecise"
+// or "slower and precise".
+//
+// The random number seeds are arbitrary and were obtained from random.org. If
+// you change them you'll need to change the tests as well, because their
+// expected output is based on the particular sequence of trial results that we
+// get with these seeds.
+static void ResetBernoulli() {
+ new (gBernoulli)
+ FastBernoulliTrial(0.003, 0x8e26eeee166bc8ca, 0x56820f304a9c9ae0);
+}
+
+static void AllocCallback(void* aPtr, size_t aReqSize, Thread* aT) {
+ if (!aPtr) {
+ return;
+ }
+
+ AutoLockState lock;
+ AutoBlockIntercepts block(aT);
+
+ size_t actualSize = gMallocTable.malloc_usable_size(aPtr);
+
+ // We may or may not record the allocation stack trace, depending on the
+ // options and the outcome of a Bernoulli trial.
+ bool getTrace = gOptions->DoFullStacks() || gBernoulli->trial(actualSize);
+ LiveBlock b(aPtr, aReqSize, getTrace ? StackTrace::Get(aT) : nullptr);
+ LiveBlockTable::AddPtr p = gLiveBlockTable->lookupForAdd(aPtr);
+ if (!p) {
+ // Most common case: there wasn't a record already.
+ MOZ_ALWAYS_TRUE(gLiveBlockTable->add(p, b));
+ } else {
+ // Edge-case: there was a record for the same address. We'll assume the
+ // allocator is not giving out a pointer to an existing allocation, so
+ // this means the previously recorded allocation was freed while we were
+ // blocking interceptions. This can happen while processing the data in
+ // e.g. AnalyzeImpl.
+ if (gOptions->IsCumulativeMode()) {
+ // Copy it out so it can be added to the dead block list later.
+ DeadBlock db(*p);
+ MaybeAddToDeadBlockTable(db);
+ }
+ gLiveBlockTable->remove(p);
+ MOZ_ALWAYS_TRUE(gLiveBlockTable->putNew(aPtr, b));
+ }
+}
+
+static void FreeCallback(void* aPtr, Thread* aT, DeadBlock* aDeadBlock) {
+ if (!aPtr) {
+ return;
+ }
+
+ AutoLockState lock;
+ AutoBlockIntercepts block(aT);
+
+ if (LiveBlockTable::Ptr lb = gLiveBlockTable->lookup(aPtr)) {
+ if (gOptions->IsCumulativeMode()) {
+ // Copy it out so it can be added to the dead block list later.
+ new (aDeadBlock) DeadBlock(*lb);
+ }
+ gLiveBlockTable->remove(lb);
+ } else {
+ // We have no record of the block. It must be a bogus pointer, or one that
+ // DMD wasn't able to see allocated. This should be extremely rare.
+ }
+
+ if (gStackTraceTable->count() > gGCStackTraceTableWhenSizeExceeds) {
+ GCStackTraces();
+ }
+}
+
+//---------------------------------------------------------------------------
+// malloc/free interception
+//---------------------------------------------------------------------------
+
+static bool Init(malloc_table_t* aMallocTable);
+
+} // namespace dmd
+} // namespace mozilla
+
+static void* replace_malloc(size_t aSize) {
+ using namespace mozilla::dmd;
+
+ Thread* t = Thread::Fetch();
+ if (t->InterceptsAreBlocked()) {
+ // Intercepts are blocked, which means this must be a call to malloc
+ // triggered indirectly by DMD (e.g. via MozStackWalk). Be infallible.
+ return InfallibleAllocPolicy::malloc_(aSize);
+ }
+
+ // This must be a call to malloc from outside DMD. Intercept it.
+ void* ptr = gMallocTable.malloc(aSize);
+ AllocCallback(ptr, aSize, t);
+ return ptr;
+}
+
+static void* replace_calloc(size_t aCount, size_t aSize) {
+ using namespace mozilla::dmd;
+
+ Thread* t = Thread::Fetch();
+ if (t->InterceptsAreBlocked()) {
+ return InfallibleAllocPolicy::calloc_(aCount, aSize);
+ }
+
+ // |aCount * aSize| could overflow, but if that happens then
+ // |gMallocTable.calloc()| will return nullptr and |AllocCallback()| will
+ // return immediately without using the overflowed value.
+ void* ptr = gMallocTable.calloc(aCount, aSize);
+ AllocCallback(ptr, aCount * aSize, t);
+ return ptr;
+}
+
+static void* replace_realloc(void* aOldPtr, size_t aSize) {
+ using namespace mozilla::dmd;
+
+ Thread* t = Thread::Fetch();
+ if (t->InterceptsAreBlocked()) {
+ return InfallibleAllocPolicy::realloc_(aOldPtr, aSize);
+ }
+
+ // If |aOldPtr| is nullptr, the call is equivalent to |malloc(aSize)|.
+ if (!aOldPtr) {
+ return replace_malloc(aSize);
+ }
+
+ // Be very careful here! Must remove the block from the table before doing
+ // the realloc to avoid races, just like in replace_free().
+ // Nb: This does an unnecessary hashtable remove+add if the block doesn't
+ // move, but doing better isn't worth the effort.
+ DeadBlock db;
+ FreeCallback(aOldPtr, t, &db);
+ void* ptr = gMallocTable.realloc(aOldPtr, aSize);
+ if (ptr) {
+ AllocCallback(ptr, aSize, t);
+ MaybeAddToDeadBlockTable(db);
+ } else {
+ // If realloc fails, we undo the prior operations by re-inserting the old
+ // pointer into the live block table. We don't have to do anything with the
+ // dead block list because the dead block hasn't yet been inserted. The
+ // block will end up looking like it was allocated for the first time here,
+ // which is untrue, and the slop bytes will be zero, which may be untrue.
+ // But this case is rare and doing better isn't worth the effort.
+ AllocCallback(aOldPtr, gMallocTable.malloc_usable_size(aOldPtr), t);
+ }
+ return ptr;
+}
+
+static void* replace_memalign(size_t aAlignment, size_t aSize) {
+ using namespace mozilla::dmd;
+
+ Thread* t = Thread::Fetch();
+ if (t->InterceptsAreBlocked()) {
+ return InfallibleAllocPolicy::memalign_(aAlignment, aSize);
+ }
+
+ void* ptr = gMallocTable.memalign(aAlignment, aSize);
+ AllocCallback(ptr, aSize, t);
+ return ptr;
+}
+
+static void replace_free(void* aPtr) {
+ using namespace mozilla::dmd;
+
+ Thread* t = Thread::Fetch();
+ if (t->InterceptsAreBlocked()) {
+ return InfallibleAllocPolicy::free_(aPtr);
+ }
+
+ // Do the actual free after updating the table. Otherwise, another thread
+ // could call malloc and get the freed block and update the table, and then
+ // our update here would remove the newly-malloc'd block.
+ DeadBlock db;
+ FreeCallback(aPtr, t, &db);
+ MaybeAddToDeadBlockTable(db);
+ gMallocTable.free(aPtr);
+}
+
+void replace_init(malloc_table_t* aMallocTable, ReplaceMallocBridge** aBridge) {
+ if (mozilla::dmd::Init(aMallocTable)) {
+#define MALLOC_FUNCS MALLOC_FUNCS_MALLOC_BASE
+#define MALLOC_DECL(name, ...) aMallocTable->name = replace_##name;
+#include "malloc_decls.h"
+ *aBridge = mozilla::dmd::gDMDBridge;
+ }
+}
+
+namespace mozilla {
+namespace dmd {
+
+//---------------------------------------------------------------------------
+// Options (Part 2)
+//---------------------------------------------------------------------------
+
+// Given an |aOptionName| like "foo", succeed if |aArg| has the form "foo=blah"
+// (where "blah" is non-empty) and return the pointer to "blah". |aArg| can
+// have leading space chars (but not other whitespace).
+const char* Options::ValueIfMatch(const char* aArg, const char* aOptionName) {
+ MOZ_ASSERT(!isspace(*aArg)); // any leading whitespace should not remain
+ size_t optionLen = strlen(aOptionName);
+ if (strncmp(aArg, aOptionName, optionLen) == 0 && aArg[optionLen] == '=' &&
+ aArg[optionLen + 1]) {
+ return aArg + optionLen + 1;
+ }
+ return nullptr;
+}
+
+// Extracts a |long| value for an option from an argument. It must be within
+// the range |aMin..aMax| (inclusive).
+bool Options::GetLong(const char* aArg, const char* aOptionName, long aMin,
+ long aMax, long* aValue) {
+ if (const char* optionValue = ValueIfMatch(aArg, aOptionName)) {
+ char* endPtr;
+ *aValue = strtol(optionValue, &endPtr, /* base */ 10);
+ if (!*endPtr && aMin <= *aValue && *aValue <= aMax && *aValue != LONG_MIN &&
+ *aValue != LONG_MAX) {
+ return true;
+ }
+ }
+ return false;
+}
+
+// Extracts a |bool| value for an option -- encoded as "yes" or "no" -- from an
+// argument.
+bool Options::GetBool(const char* aArg, const char* aOptionName, bool* aValue) {
+ if (const char* optionValue = ValueIfMatch(aArg, aOptionName)) {
+ if (strcmp(optionValue, "yes") == 0) {
+ *aValue = true;
+ return true;
+ }
+ if (strcmp(optionValue, "no") == 0) {
+ *aValue = false;
+ return true;
+ }
+ }
+ return false;
+}
+
+Options::Options(const char* aDMDEnvVar)
+ : mDMDEnvVar(aDMDEnvVar ? InfallibleAllocPolicy::strdup_(aDMDEnvVar)
+ : nullptr),
+ mMode(Mode::DarkMatter),
+ mStacks(Stacks::Partial),
+ mShowDumpStats(false) {
+ char* e = mDMDEnvVar;
+ if (e && strcmp(e, "1") != 0) {
+ bool isEnd = false;
+ while (!isEnd) {
+ // Consume leading whitespace.
+ while (isspace(*e)) {
+ e++;
+ }
+
+ // Save the start of the arg.
+ const char* arg = e;
+
+ // Find the first char after the arg, and temporarily change it to '\0'
+ // to isolate the arg.
+ while (!isspace(*e) && *e != '\0') {
+ e++;
+ }
+ char replacedChar = *e;
+ isEnd = replacedChar == '\0';
+ *e = '\0';
+
+ // Handle arg
+ bool myBool;
+ if (strcmp(arg, "--mode=live") == 0) {
+ mMode = Mode::Live;
+ } else if (strcmp(arg, "--mode=dark-matter") == 0) {
+ mMode = Mode::DarkMatter;
+ } else if (strcmp(arg, "--mode=cumulative") == 0) {
+ mMode = Mode::Cumulative;
+ } else if (strcmp(arg, "--mode=scan") == 0) {
+ mMode = Mode::Scan;
+
+ } else if (strcmp(arg, "--stacks=full") == 0) {
+ mStacks = Stacks::Full;
+ } else if (strcmp(arg, "--stacks=partial") == 0) {
+ mStacks = Stacks::Partial;
+
+ } else if (GetBool(arg, "--show-dump-stats", &myBool)) {
+ mShowDumpStats = myBool;
+
+ } else if (strcmp(arg, "") == 0) {
+ // This can only happen if there is trailing whitespace. Ignore.
+ MOZ_ASSERT(isEnd);
+
+ } else {
+ BadArg(arg);
+ }
+
+ // Undo the temporary isolation.
+ *e = replacedChar;
+ }
+ }
+
+ if (mMode == Mode::Scan) {
+ mStacks = Stacks::Full;
+ }
+}
+
+void Options::BadArg(const char* aArg) {
+ StatusMsg("\n");
+ StatusMsg("Bad entry in the $DMD environment variable: '%s'.\n", aArg);
+ StatusMsg("See the output of |mach help run| for the allowed options.\n");
+ exit(1);
+}
+
+const char* Options::ModeString() const {
+ switch (mMode) {
+ case Mode::Live:
+ return "live";
+ case Mode::DarkMatter:
+ return "dark-matter";
+ case Mode::Cumulative:
+ return "cumulative";
+ case Mode::Scan:
+ return "scan";
+ default:
+ MOZ_ASSERT(false);
+ return "(unknown DMD mode)";
+ }
+}
+
+//---------------------------------------------------------------------------
+// DMD start-up
+//---------------------------------------------------------------------------
+
+#ifndef XP_WIN
+static void prefork() {
+ if (gStateLock) {
+ gStateLock->Lock();
+ }
+}
+
+static void postfork() {
+ if (gStateLock) {
+ gStateLock->Unlock();
+ }
+}
+#endif
+
+// WARNING: this function runs *very* early -- before all static initializers
+// have run. For this reason, non-scalar globals such as gStateLock and
+// gStackTraceTable are allocated dynamically (so we can guarantee their
+// construction in this function) rather than statically.
+static bool Init(malloc_table_t* aMallocTable) {
+ // DMD is controlled by the |DMD| environment variable.
+ const char* e = getenv("DMD");
+
+ if (!e) {
+ return false;
+ }
+ // Initialize the function table first, because StatusMsg uses
+ // InfallibleAllocPolicy::malloc_, which uses it.
+ gMallocTable = *aMallocTable;
+
+ StatusMsg("$DMD = '%s'\n", e);
+
+ gDMDBridge = InfallibleAllocPolicy::new_<DMDBridge>();
+
+#ifndef XP_WIN
+ // Avoid deadlocks when forking by acquiring our state lock prior to forking
+ // and releasing it after forking. See |LogAlloc|'s |replace_init| for
+ // in-depth details.
+ //
+ // Note: This must run after attempting an allocation so as to give the
+ // system malloc a chance to insert its own atfork handler.
+ pthread_atfork(prefork, postfork, postfork);
+#endif
+ // Parse $DMD env var.
+ gOptions = InfallibleAllocPolicy::new_<Options>(e);
+
+ gStateLock = InfallibleAllocPolicy::new_<Mutex>();
+
+ gBernoulli = (FastBernoulliTrial*)InfallibleAllocPolicy::malloc_(
+ sizeof(FastBernoulliTrial));
+ ResetBernoulli();
+
+ Thread::Init();
+
+ {
+ AutoLockState lock;
+
+ gStackTraceTable = InfallibleAllocPolicy::new_<StackTraceTable>(8192);
+ gLiveBlockTable = InfallibleAllocPolicy::new_<LiveBlockTable>(8192);
+
+ // Create this even if the mode isn't Cumulative (albeit with a small
+ // size), in case the mode is changed later on (as is done by SmokeDMD.cpp,
+ // for example).
+ size_t tableSize = gOptions->IsCumulativeMode() ? 8192 : 4;
+ gDeadBlockTable = InfallibleAllocPolicy::new_<DeadBlockTable>(tableSize);
+ }
+
+ return true;
+}
+
+//---------------------------------------------------------------------------
+// Block reporting and unreporting
+//---------------------------------------------------------------------------
+
+static void ReportHelper(const void* aPtr, bool aReportedOnAlloc) {
+ if (!gOptions->IsDarkMatterMode() || !aPtr) {
+ return;
+ }
+
+ Thread* t = Thread::Fetch();
+
+ AutoBlockIntercepts block(t);
+ AutoLockState lock;
+
+ if (LiveBlockTable::Ptr p = gLiveBlockTable->lookup(aPtr)) {
+ p->Report(t, aReportedOnAlloc);
+ } else {
+ // We have no record of the block. It must be a bogus pointer. This should
+ // be extremely rare because Report() is almost always called in
+ // conjunction with a malloc_size_of-style function. Print a message so
+ // that we get some feedback.
+ StatusMsg("Unknown pointer %p\n", aPtr);
+ }
+}
+
+void DMDFuncs::Report(const void* aPtr) {
+ ReportHelper(aPtr, /* onAlloc */ false);
+}
+
+void DMDFuncs::ReportOnAlloc(const void* aPtr) {
+ ReportHelper(aPtr, /* onAlloc */ true);
+}
+
+//---------------------------------------------------------------------------
+// DMD output
+//---------------------------------------------------------------------------
+
+// The version number of the output format. Increment this if you make
+// backwards-incompatible changes to the format. See DMD.h for the version
+// history.
+static const int kOutputVersionNumber = 5;
+
+// Note that, unlike most SizeOf* functions, this function does not take a
+// |mozilla::MallocSizeOf| argument. That's because those arguments are
+// primarily to aid DMD track heap blocks... but DMD deliberately doesn't track
+// heap blocks it allocated for itself!
+//
+// SizeOfInternal should be called while you're holding the state lock and
+// while intercepts are blocked; SizeOf acquires the lock and blocks
+// intercepts.
+
+static void SizeOfInternal(Sizes* aSizes) {
+ MOZ_ASSERT(gStateLock->IsLocked());
+ MOZ_ASSERT(Thread::Fetch()->InterceptsAreBlocked());
+
+ aSizes->Clear();
+
+ StackTraceSet usedStackTraces;
+ GatherUsedStackTraces(usedStackTraces);
+
+ for (auto iter = gStackTraceTable->iter(); !iter.done(); iter.next()) {
+ StackTrace* const& st = iter.get();
+
+ if (usedStackTraces.has(st)) {
+ aSizes->mStackTracesUsed += MallocSizeOf(st);
+ } else {
+ aSizes->mStackTracesUnused += MallocSizeOf(st);
+ }
+ }
+
+ aSizes->mStackTraceTable =
+ gStackTraceTable->shallowSizeOfIncludingThis(MallocSizeOf);
+
+ aSizes->mLiveBlockTable =
+ gLiveBlockTable->shallowSizeOfIncludingThis(MallocSizeOf);
+
+ aSizes->mDeadBlockTable =
+ gDeadBlockTable->shallowSizeOfIncludingThis(MallocSizeOf);
+}
+
+void DMDFuncs::SizeOf(Sizes* aSizes) {
+ aSizes->Clear();
+
+ AutoBlockIntercepts block(Thread::Fetch());
+ AutoLockState lock;
+ SizeOfInternal(aSizes);
+}
+
+void DMDFuncs::ClearReports() {
+ if (!gOptions->IsDarkMatterMode()) {
+ return;
+ }
+
+ AutoLockState lock;
+
+ // Unreport all blocks that were marked reported by a memory reporter. This
+ // excludes those that were reported on allocation, because they need to keep
+ // their reported marking.
+ for (auto iter = gLiveBlockTable->iter(); !iter.done(); iter.next()) {
+ iter.get().UnreportIfNotReportedOnAlloc();
+ }
+}
+
+class ToIdStringConverter final {
+ public:
+ ToIdStringConverter() : mIdMap(512), mNextId(0) {}
+
+ // Converts a pointer to a unique ID. Reuses the existing ID for the pointer
+ // if it's been seen before.
+ const char* ToIdString(const void* aPtr) {
+ uint32_t id;
+ PointerIdMap::AddPtr p = mIdMap.lookupForAdd(aPtr);
+ if (!p) {
+ id = mNextId++;
+ MOZ_ALWAYS_TRUE(mIdMap.add(p, aPtr, id));
+ } else {
+ id = p->value();
+ }
+ return Base32(id);
+ }
+
+ size_t sizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const {
+ return mIdMap.shallowSizeOfExcludingThis(aMallocSizeOf);
+ }
+
+ private:
+ // This function converts an integer to base-32. We use base-32 values for
+ // indexing into the traceTable and the frameTable, for the following reasons.
+ //
+ // - Base-32 gives more compact indices than base-16.
+ //
+ // - 32 is a power-of-two, which makes the necessary div/mod calculations
+ // fast.
+ //
+ // - We can (and do) choose non-numeric digits for base-32. When
+ // inspecting/debugging the JSON output, non-numeric indices are easier to
+ // search for than numeric indices.
+ //
+ char* Base32(uint32_t aN) {
+ static const char digits[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef";
+
+ char* b = mIdBuf + kIdBufLen - 1;
+ *b = '\0';
+ do {
+ b--;
+ if (b == mIdBuf) {
+ MOZ_CRASH("Base32 buffer too small");
+ }
+ *b = digits[aN % 32];
+ aN /= 32;
+ } while (aN);
+
+ return b;
+ }
+
+ PointerIdMap mIdMap;
+ uint32_t mNextId;
+
+ // |mIdBuf| must have space for at least eight chars, which is the space
+ // needed to hold 'Dffffff' (including the terminating null char), which is
+ // the base-32 representation of 0xffffffff.
+ static const size_t kIdBufLen = 16;
+ char mIdBuf[kIdBufLen];
+};
+
+// Helper class for converting a pointer value to a string.
+class ToStringConverter {
+ public:
+ const char* ToPtrString(const void* aPtr) {
+ snprintf(kPtrBuf, sizeof(kPtrBuf) - 1, "%" PRIxPTR, (uintptr_t)aPtr);
+ return kPtrBuf;
+ }
+
+ private:
+ char kPtrBuf[32];
+};
+
+static void WriteBlockContents(JSONWriter& aWriter, const LiveBlock& aBlock) {
+ size_t numWords = aBlock.ReqSize() / sizeof(uintptr_t*);
+ if (numWords == 0) {
+ return;
+ }
+
+ aWriter.StartArrayProperty("contents", aWriter.SingleLineStyle);
+ {
+ const uintptr_t** block = (const uintptr_t**)aBlock.Address();
+ ToStringConverter sc;
+ for (size_t i = 0; i < numWords; ++i) {
+ aWriter.StringElement(MakeStringSpan(sc.ToPtrString(block[i])));
+ }
+ }
+ aWriter.EndArray();
+}
+
+static void AnalyzeImpl(UniquePtr<JSONWriteFunc> aWriter) {
+ // Some blocks may have been allocated while creating |aWriter|. Those blocks
+ // will be freed at the end of this function when |write| is destroyed. The
+ // allocations will have occurred while intercepts were not blocked, so the
+ // frees better be as well, otherwise we'll get assertion failures.
+ // Therefore, this declaration must precede the AutoBlockIntercepts
+ // declaration, to ensure that |write| is destroyed *after* intercepts are
+ // unblocked.
+ JSONWriter writer(std::move(aWriter));
+
+ AutoBlockIntercepts block(Thread::Fetch());
+ AutoLockState lock;
+
+ // Allocate this on the heap instead of the stack because it's fairly large.
+ auto locService = InfallibleAllocPolicy::new_<CodeAddressService>();
+
+ StackTraceSet usedStackTraces(512);
+ PointerSet usedPcs(512);
+
+ size_t iscSize;
+
+ static int analysisCount = 1;
+ StatusMsg("Dump %d {\n", analysisCount++);
+
+ writer.Start();
+ {
+ writer.IntProperty("version", kOutputVersionNumber);
+
+ writer.StartObjectProperty("invocation");
+ {
+ const char* var = gOptions->DMDEnvVar();
+ if (var) {
+ writer.StringProperty("dmdEnvVar", MakeStringSpan(var));
+ } else {
+ writer.NullProperty("dmdEnvVar");
+ }
+
+ writer.StringProperty("mode", MakeStringSpan(gOptions->ModeString()));
+ }
+ writer.EndObject();
+
+ StatusMsg(" Constructing the heap block list...\n");
+
+ ToIdStringConverter isc;
+ ToStringConverter sc;
+
+ writer.StartArrayProperty("blockList");
+ {
+ // Lambda that writes out a live block.
+ auto writeLiveBlock = [&](const LiveBlock& aB, size_t aNum) {
+ aB.AddStackTracesToTable(usedStackTraces);
+
+ MOZ_ASSERT_IF(gOptions->IsScanMode(), aNum == 1);
+
+ writer.StartObjectElement(writer.SingleLineStyle);
+ {
+ if (gOptions->IsScanMode()) {
+ writer.StringProperty("addr",
+ MakeStringSpan(sc.ToPtrString(aB.Address())));
+ WriteBlockContents(writer, aB);
+ }
+ writer.IntProperty("req", aB.ReqSize());
+ if (aB.SlopSize() > 0) {
+ writer.IntProperty("slop", aB.SlopSize());
+ }
+
+ if (aB.AllocStackTrace()) {
+ writer.StringProperty(
+ "alloc", MakeStringSpan(isc.ToIdString(aB.AllocStackTrace())));
+ }
+
+ if (gOptions->IsDarkMatterMode() && aB.NumReports() > 0) {
+ writer.StartArrayProperty("reps");
+ {
+ if (aB.ReportStackTrace1()) {
+ writer.StringElement(
+ MakeStringSpan(isc.ToIdString(aB.ReportStackTrace1())));
+ }
+ if (aB.ReportStackTrace2()) {
+ writer.StringElement(
+ MakeStringSpan(isc.ToIdString(aB.ReportStackTrace2())));
+ }
+ }
+ writer.EndArray();
+ }
+
+ if (aNum > 1) {
+ writer.IntProperty("num", aNum);
+ }
+ }
+ writer.EndObject();
+ };
+
+ // Live blocks.
+ if (!gOptions->IsScanMode()) {
+ // At this point we typically have many LiveBlocks that differ only in
+ // their address. Aggregate them to reduce the size of the output file.
+ AggregatedLiveBlockTable agg(8192);
+ for (auto iter = gLiveBlockTable->iter(); !iter.done(); iter.next()) {
+ const LiveBlock& b = iter.get();
+ b.AddStackTracesToTable(usedStackTraces);
+
+ if (AggregatedLiveBlockTable::AddPtr p = agg.lookupForAdd(&b)) {
+ p->value() += 1;
+ } else {
+ MOZ_ALWAYS_TRUE(agg.add(p, &b, 1));
+ }
+ }
+
+ // Now iterate over the aggregated table.
+ for (auto iter = agg.iter(); !iter.done(); iter.next()) {
+ const LiveBlock& b = *iter.get().key();
+ size_t num = iter.get().value();
+ writeLiveBlock(b, num);
+ }
+
+ } else {
+ // In scan mode we cannot aggregate because we print each live block's
+ // address and contents.
+ for (auto iter = gLiveBlockTable->iter(); !iter.done(); iter.next()) {
+ const LiveBlock& b = iter.get();
+ b.AddStackTracesToTable(usedStackTraces);
+
+ writeLiveBlock(b, 1);
+ }
+ }
+
+ // Dead blocks.
+ for (auto iter = gDeadBlockTable->iter(); !iter.done(); iter.next()) {
+ const DeadBlock& b = iter.get().key();
+ b.AddStackTracesToTable(usedStackTraces);
+
+ size_t num = iter.get().value();
+ MOZ_ASSERT(num > 0);
+
+ writer.StartObjectElement(writer.SingleLineStyle);
+ {
+ writer.IntProperty("req", b.ReqSize());
+ if (b.SlopSize() > 0) {
+ writer.IntProperty("slop", b.SlopSize());
+ }
+ if (b.AllocStackTrace()) {
+ writer.StringProperty(
+ "alloc", MakeStringSpan(isc.ToIdString(b.AllocStackTrace())));
+ }
+
+ if (num > 1) {
+ writer.IntProperty("num", num);
+ }
+ }
+ writer.EndObject();
+ }
+ }
+ writer.EndArray();
+
+ StatusMsg(" Constructing the stack trace table...\n");
+
+ writer.StartObjectProperty("traceTable");
+ {
+ for (auto iter = usedStackTraces.iter(); !iter.done(); iter.next()) {
+ const StackTrace* const st = iter.get();
+ writer.StartArrayProperty(MakeStringSpan(isc.ToIdString(st)),
+ writer.SingleLineStyle);
+ {
+ for (uint32_t i = 0; i < st->Length(); i++) {
+ const void* pc = st->Pc(i);
+ writer.StringElement(MakeStringSpan(isc.ToIdString(pc)));
+ MOZ_ALWAYS_TRUE(usedPcs.put(pc));
+ }
+ }
+ writer.EndArray();
+ }
+ }
+ writer.EndObject();
+
+ StatusMsg(" Constructing the stack frame table...\n");
+
+ writer.StartObjectProperty("frameTable");
+ {
+ static const size_t locBufLen = 1024;
+ char locBuf[locBufLen];
+
+ for (auto iter = usedPcs.iter(); !iter.done(); iter.next()) {
+ const void* const pc = iter.get();
+
+ // Use 0 for the frame number. See the JSON format description comment
+ // in DMD.h to understand why.
+ locService->GetLocation(0, pc, locBuf, locBufLen);
+ writer.StringProperty(MakeStringSpan(isc.ToIdString(pc)),
+ MakeStringSpan(locBuf));
+ }
+ }
+ writer.EndObject();
+
+ iscSize = isc.sizeOfExcludingThis(MallocSizeOf);
+ }
+ writer.End();
+
+ if (gOptions->ShowDumpStats()) {
+ Sizes sizes;
+ SizeOfInternal(&sizes);
+
+ static const size_t kBufLen = 64;
+ char buf1[kBufLen];
+ char buf2[kBufLen];
+ char buf3[kBufLen];
+
+ StatusMsg(" Execution measurements {\n");
+
+ StatusMsg(" Data structures that persist after Dump() ends {\n");
+
+ StatusMsg(" Used stack traces: %10s bytes\n",
+ Show(sizes.mStackTracesUsed, buf1, kBufLen));
+
+ StatusMsg(" Unused stack traces: %10s bytes\n",
+ Show(sizes.mStackTracesUnused, buf1, kBufLen));
+
+ StatusMsg(" Stack trace table: %10s bytes (%s entries, %s used)\n",
+ Show(sizes.mStackTraceTable, buf1, kBufLen),
+ Show(gStackTraceTable->capacity(), buf2, kBufLen),
+ Show(gStackTraceTable->count(), buf3, kBufLen));
+
+ StatusMsg(" Live block table: %10s bytes (%s entries, %s used)\n",
+ Show(sizes.mLiveBlockTable, buf1, kBufLen),
+ Show(gLiveBlockTable->capacity(), buf2, kBufLen),
+ Show(gLiveBlockTable->count(), buf3, kBufLen));
+
+ StatusMsg(" Dead block table: %10s bytes (%s entries, %s used)\n",
+ Show(sizes.mDeadBlockTable, buf1, kBufLen),
+ Show(gDeadBlockTable->capacity(), buf2, kBufLen),
+ Show(gDeadBlockTable->count(), buf3, kBufLen));
+
+ StatusMsg(" }\n");
+ StatusMsg(" Data structures that are destroyed after Dump() ends {\n");
+
+ StatusMsg(
+ " Location service: %10s bytes\n",
+ Show(locService->SizeOfIncludingThis(MallocSizeOf), buf1, kBufLen));
+ StatusMsg(" Used stack traces set: %10s bytes\n",
+ Show(usedStackTraces.shallowSizeOfExcludingThis(MallocSizeOf),
+ buf1, kBufLen));
+ StatusMsg(
+ " Used PCs set: %10s bytes\n",
+ Show(usedPcs.shallowSizeOfExcludingThis(MallocSizeOf), buf1, kBufLen));
+ StatusMsg(" Pointer ID map: %10s bytes\n",
+ Show(iscSize, buf1, kBufLen));
+
+ StatusMsg(" }\n");
+ StatusMsg(" Counts {\n");
+
+ size_t hits = locService->NumCacheHits();
+ size_t misses = locService->NumCacheMisses();
+ size_t requests = hits + misses;
+ StatusMsg(" Location service: %10s requests\n",
+ Show(requests, buf1, kBufLen));
+
+ size_t count = locService->CacheCount();
+ size_t capacity = locService->CacheCapacity();
+ StatusMsg(
+ " Location service cache: "
+ "%4.1f%% hit rate, %.1f%% occupancy at end\n",
+ Percent(hits, requests), Percent(count, capacity));
+
+ StatusMsg(" }\n");
+ StatusMsg(" }\n");
+ }
+
+ InfallibleAllocPolicy::delete_(locService);
+
+ StatusMsg("}\n");
+}
+
+void DMDFuncs::Analyze(UniquePtr<JSONWriteFunc> aWriter) {
+ AnalyzeImpl(std::move(aWriter));
+ ClearReports();
+}
+
+//---------------------------------------------------------------------------
+// Testing
+//---------------------------------------------------------------------------
+
+void DMDFuncs::ResetEverything(const char* aOptions) {
+ AutoLockState lock;
+
+ // Reset options.
+ InfallibleAllocPolicy::delete_(gOptions);
+ gOptions = InfallibleAllocPolicy::new_<Options>(aOptions);
+
+ // Clear all existing blocks.
+ gLiveBlockTable->clear();
+ gDeadBlockTable->clear();
+
+ // Reset gBernoulli to a deterministic state. (Its current state depends on
+ // all previous trials.)
+ ResetBernoulli();
+}
+
+} // namespace dmd
+} // namespace mozilla
diff --git a/memory/replace/dmd/DMD.h b/memory/replace/dmd/DMD.h
new file mode 100644
index 0000000000..c057047800
--- /dev/null
+++ b/memory/replace/dmd/DMD.h
@@ -0,0 +1,291 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 DMD_h___
+#define DMD_h___
+
+#include <stdarg.h>
+#include <string.h>
+
+#include <utility>
+
+#include "mozilla/DebugOnly.h"
+#include "mozilla/Types.h"
+#include "mozilla/UniquePtr.h"
+#include "replace_malloc_bridge.h"
+
+namespace mozilla {
+
+class JSONWriteFunc;
+
+namespace dmd {
+
+struct Sizes {
+ size_t mStackTracesUsed;
+ size_t mStackTracesUnused;
+ size_t mStackTraceTable;
+ size_t mLiveBlockTable;
+ size_t mDeadBlockTable;
+
+ Sizes() { Clear(); }
+ void Clear() { memset(this, 0, sizeof(Sizes)); }
+};
+
+// See further below for a description of each method. The DMDFuncs class
+// should contain a virtual method for each of them (except IsRunning,
+// which can be inferred from the DMDFuncs singleton existing).
+struct DMDFuncs {
+ virtual void Report(const void*);
+
+ virtual void ReportOnAlloc(const void*);
+
+ virtual void ClearReports();
+
+ virtual void Analyze(UniquePtr<JSONWriteFunc>);
+
+ virtual void SizeOf(Sizes*);
+
+ virtual void StatusMsg(const char*, va_list) MOZ_FORMAT_PRINTF(2, 0);
+
+ virtual void ResetEverything(const char*);
+
+#ifndef REPLACE_MALLOC_IMPL
+ // We deliberately don't use ReplaceMalloc::GetDMDFuncs here, because if we
+ // did, the following would happen.
+ // - The code footprint of each call to Get() larger as GetDMDFuncs ends
+ // up inlined.
+ // - When no replace-malloc library is loaded, the number of instructions
+ // executed is equivalent, but don't necessarily fit in the same cache
+ // line.
+ // - When a non-DMD replace-malloc library is loaded, the overhead is
+ // higher because there is first a check for the replace malloc bridge
+ // and then for the DMDFuncs singleton.
+ // Initializing the DMDFuncs singleton on the first access makes the
+ // overhead even worse. Either Get() is inlined and massive, or it isn't
+ // and a simple value check becomes a function call.
+ static DMDFuncs* Get() { return sSingleton.Get(); }
+
+ private:
+ // Wrapper class keeping a pointer to the DMD functions. It is statically
+ // initialized because it needs to be set early enough.
+ // Debug builds also check that it's never accessed before the static
+ // initialization actually occured, which could be the case if some other
+ // static initializer ended up calling into DMD.
+ class Singleton {
+ public:
+ Singleton()
+ : mValue(ReplaceMalloc::GetDMDFuncs())
+# ifdef DEBUG
+ ,
+ mInitialized(true)
+# endif
+ {
+ }
+
+ DMDFuncs* Get() {
+ MOZ_ASSERT(mInitialized);
+ return mValue;
+ }
+
+ private:
+ DMDFuncs* mValue;
+# ifdef DEBUG
+ bool mInitialized;
+# endif
+ };
+
+ // This singleton pointer must be defined on the program side. In Gecko,
+ // this is done in xpcom/base/nsMemoryInfoDumper.cpp.
+ static /* DMDFuncs:: */ Singleton sSingleton;
+#endif
+};
+
+#ifndef REPLACE_MALLOC_IMPL
+// Mark a heap block as reported by a memory reporter.
+inline void Report(const void* aPtr) {
+ DMDFuncs* funcs = DMDFuncs::Get();
+ if (funcs) {
+ funcs->Report(aPtr);
+ }
+}
+
+// Mark a heap block as reported immediately on allocation.
+inline void ReportOnAlloc(const void* aPtr) {
+ DMDFuncs* funcs = DMDFuncs::Get();
+ if (funcs) {
+ funcs->ReportOnAlloc(aPtr);
+ }
+}
+
+// Clears existing reportedness data from any prior runs of the memory
+// reporters. The following sequence should be used.
+// - ClearReports()
+// - run the memory reporters
+// - Analyze()
+// This sequence avoids spurious twice-reported warnings.
+inline void ClearReports() {
+ DMDFuncs* funcs = DMDFuncs::Get();
+ if (funcs) {
+ funcs->ClearReports();
+ }
+}
+
+// Determines which heap blocks have been reported, and dumps JSON output
+// (via |aWriter|) describing the heap.
+//
+// The following sample output contains comments that explain the format and
+// design choices. The output files can be quite large, so a number of
+// decisions were made to minimize size, such as using short property names and
+// omitting properties whenever possible.
+//
+// {
+// // The version number of the format, which will be incremented each time
+// // backwards-incompatible changes are made. A mandatory integer.
+// //
+// // Version history:
+// // - 1: Bug 1044709
+// // - 2: Bug 1094552
+// // - 3: Bug 1100851
+// // - 4: Bug 1121830
+// // - 5: Bug 1253512
+// "version": 5,
+//
+// // Information about how DMD was invoked. A mandatory object.
+// "invocation": {
+// // The contents of the $DMD environment variable. A string, or |null| if
+// // $DMD is undefined.
+// "dmdEnvVar": "--mode=dark-matter",
+//
+// // The profiling mode. A mandatory string taking one of the following
+// // values: "live", "dark-matter", "cumulative", "scan".
+// "mode": "dark-matter",
+// },
+//
+// // Details of all analyzed heap blocks. A mandatory array.
+// "blockList": [
+// // An example of a heap block.
+// {
+// // Requested size, in bytes. This is a mandatory integer.
+// "req": 3584,
+//
+// // Requested slop size, in bytes. This is mandatory if it is non-zero,
+// // but omitted otherwise.
+// "slop": 512,
+//
+// // The stack trace at which the block was allocated. An optional
+// // string that indexes into the "traceTable" object. If omitted, no
+// // allocation stack trace was recorded for the block.
+// "alloc": "A",
+//
+// // One or more stack traces at which this heap block was reported by a
+// // memory reporter. An optional array that will only be present in
+// // "dark-matter" mode. The elements are strings that index into
+// // the "traceTable" object.
+// "reps": ["B"]
+//
+// // The number of heap blocks with exactly the above properties. This
+// // is mandatory if it is greater than one, but omitted otherwise.
+// // (Blocks with identical properties don't have to be aggregated via
+// // this property, but it can greatly reduce output file size.)
+// "num": 5,
+//
+// // The address of the block. This is mandatory in "scan" mode, but
+// // omitted otherwise.
+// "addr": "4e4e4e4e",
+//
+// // The contents of the block, read one word at a time. This is
+// // mandatory in "scan" mode for blocks at least one word long, but
+// // omitted otherwise.
+// "contents": ["0", "6", "7f7f7f7f", "0"]
+// }
+// ],
+//
+// // The stack traces referenced by elements of the "blockList" array. This
+// // could be an array, but making it an object makes it easier to see
+// // which stacks correspond to which references in the "blockList" array.
+// "traceTable": {
+// // Each property corresponds to a stack trace mentioned in the "blocks"
+// // object. Each element is an index into the "frameTable" object.
+// "A": ["D", "E"],
+// "B": ["F", "G"]
+// },
+//
+// // The stack frames referenced by the "traceTable" object. The
+// // descriptions can be quite long, so they are stored separately from the
+// // "traceTable" object so that each one only has to be written once.
+// // This could also be an array, but again, making it an object makes it
+// // easier to see which frames correspond to which references in the
+// // "traceTable" object.
+// "frameTable": {
+// // Each property key is a frame key mentioned in the "traceTable" object.
+// // Each property value is a string containing a frame description. Each
+// // frame description must be in a format recognized by `fix_stacks.py`,
+// // which requires a frame number at the start. Because each stack frame
+// // description in this table can be shared between multiple stack
+// // traces, we use a dummy value of #00. The proper frame number can be
+// // reconstructed later by scripts that output stack traces in a
+// // conventional non-shared format.
+// "D": "#00: foo (Foo.cpp:123)",
+// "E": "#00: bar (Bar.cpp:234)",
+// "F": "#00: baz (Baz.cpp:345)",
+// "G": "#00: quux (Quux.cpp:456)"
+// }
+// }
+//
+// Implementation note: normally, this function wouldn't be templated, but in
+// that case, the function is compiled, which makes the destructor for the
+// UniquePtr fire up, and that needs JSONWriteFunc to be fully defined. That,
+// in turn, requires to include JSONWriter.h, which includes
+// double-conversion.h, which ends up breaking various things built with
+// -Werror for various reasons.
+//
+template <typename JSONWriteFunc>
+inline void Analyze(UniquePtr<JSONWriteFunc> aWriteFunc) {
+ DMDFuncs* funcs = DMDFuncs::Get();
+ if (funcs) {
+ funcs->Analyze(std::move(aWriteFunc));
+ }
+}
+
+// Gets the size of various data structures. Used to implement a memory
+// reporter for DMD.
+inline void SizeOf(Sizes* aSizes) {
+ DMDFuncs* funcs = DMDFuncs::Get();
+ if (funcs) {
+ funcs->SizeOf(aSizes);
+ }
+}
+
+// Prints a status message prefixed with "DMD[<pid>]". Use sparingly.
+MOZ_FORMAT_PRINTF(1, 2)
+inline void StatusMsg(const char* aFmt, ...) {
+ DMDFuncs* funcs = DMDFuncs::Get();
+ if (funcs) {
+ va_list ap;
+ va_start(ap, aFmt);
+ funcs->StatusMsg(aFmt, ap);
+ va_end(ap);
+ }
+}
+
+// Indicates whether or not DMD is running.
+inline bool IsRunning() { return !!DMDFuncs::Get(); }
+
+// Resets all DMD options and then sets new ones according to those specified
+// in |aOptions|. Also clears all recorded data about allocations. Only used
+// for testing purposes.
+inline void ResetEverything(const char* aOptions) {
+ DMDFuncs* funcs = DMDFuncs::Get();
+ if (funcs) {
+ funcs->ResetEverything(aOptions);
+ }
+}
+#endif
+
+} // namespace dmd
+} // namespace mozilla
+
+#endif /* DMD_h___ */
diff --git a/memory/replace/dmd/README b/memory/replace/dmd/README
new file mode 100644
index 0000000000..537893358a
--- /dev/null
+++ b/memory/replace/dmd/README
@@ -0,0 +1,3 @@
+This is DMD. See
+https://firefox-source-docs.mozilla.org/performance/memory/dmd.html for
+details on how to use it.
diff --git a/memory/replace/dmd/block_analyzer.py b/memory/replace/dmd/block_analyzer.py
new file mode 100644
index 0000000000..1f907b38a7
--- /dev/null
+++ b/memory/replace/dmd/block_analyzer.py
@@ -0,0 +1,292 @@
+#!/usr/bin/env python3
+
+# 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/.
+
+# From a scan mode DMD log, extract some information about a
+# particular block, such as its allocation stack or which other blocks
+# contain pointers to it. This can be useful when investigating leaks
+# caused by unknown references to refcounted objects.
+
+import argparse
+import gzip
+import json
+import re
+import sys
+
+# The DMD output version this script handles.
+outputVersion = 5
+
+# If --ignore-alloc-fns is specified, stack frames containing functions that
+# match these strings will be removed from the *start* of stack traces. (Once
+# we hit a non-matching frame, any subsequent frames won't be removed even if
+# they do match.)
+allocatorFns = [
+ "malloc (",
+ "replace_malloc",
+ "replace_calloc",
+ "replace_realloc",
+ "replace_memalign",
+ "replace_posix_memalign",
+ "malloc_zone_malloc",
+ "moz_xmalloc",
+ "moz_xcalloc",
+ "moz_xrealloc",
+ "operator new(",
+ "operator new[](",
+ "g_malloc",
+ "g_slice_alloc",
+ "callocCanGC",
+ "reallocCanGC",
+ "vpx_malloc",
+ "vpx_calloc",
+ "vpx_realloc",
+ "vpx_memalign",
+ "js_malloc",
+ "js_calloc",
+ "js_realloc",
+ "pod_malloc",
+ "pod_calloc",
+ "pod_realloc",
+ "nsTArrayInfallibleAllocator::Malloc",
+ "Allocator<ReplaceMallocBase>::malloc(",
+ "mozilla::dmd::StackTrace::Get(",
+ "mozilla::dmd::AllocCallback(",
+ "mozilla::dom::DOMArena::Allocate(",
+ # This one necessary to fully filter some sequences of allocation functions
+ # that happen in practice. Note that ??? entries that follow non-allocation
+ # functions won't be stripped, as explained above.
+ "???",
+]
+
+####
+
+# Command line arguments
+
+
+def range_1_24(string):
+ value = int(string)
+ if value < 1 or value > 24:
+ msg = "{:s} is not in the range 1..24".format(string)
+ raise argparse.ArgumentTypeError(msg)
+ return value
+
+
+parser = argparse.ArgumentParser(
+ description="Analyze the heap graph to find out things about an object. \
+By default this prints out information about blocks that point to the given block."
+)
+
+parser.add_argument("dmd_log_file_name", help="clamped DMD log file name")
+
+parser.add_argument("block", help="address of the block of interest")
+
+parser.add_argument(
+ "--info",
+ dest="info",
+ action="store_true",
+ default=False,
+ help="Print out information about the block.",
+)
+
+parser.add_argument(
+ "-sfl",
+ "--max-stack-frame-length",
+ type=int,
+ default=300,
+ help="Maximum number of characters to print from each stack frame",
+)
+
+parser.add_argument(
+ "-a",
+ "--ignore-alloc-fns",
+ action="store_true",
+ help="ignore allocation functions at the start of traces",
+)
+
+parser.add_argument(
+ "-f",
+ "--max-frames",
+ type=range_1_24,
+ default=8,
+ help="maximum number of frames to consider in each trace",
+)
+
+parser.add_argument(
+ "-c",
+ "--chain-reports",
+ action="store_true",
+ help="if only one block is found to hold onto the object, report "
+ "the next one, too",
+)
+
+
+####
+
+
+class BlockData:
+ def __init__(self, json_block):
+ self.addr = json_block["addr"]
+
+ if "contents" in json_block:
+ contents = json_block["contents"]
+ else:
+ contents = []
+ self.contents = []
+ for c in contents:
+ self.contents.append(int(c, 16))
+
+ self.req_size = json_block["req"]
+
+ self.alloc_stack = json_block["alloc"]
+
+
+def print_trace_segment(args, stacks, block):
+ (traceTable, frameTable) = stacks
+
+ for l in traceTable[block.alloc_stack]:
+ # The 5: is to remove the bogus leading "#00: " from the stack frame.
+ print(" " + frameTable[l][5 : args.max_stack_frame_length])
+
+
+def show_referrers(args, blocks, stacks, block):
+ visited = set([])
+
+ anyFound = False
+
+ while True:
+ referrers = {}
+
+ for b, data in blocks.items():
+ which_edge = 0
+ for e in data.contents:
+ if e == block:
+ # 8 is the number of bytes per word on a 64-bit system.
+ # XXX This means that this output will be wrong for logs from 32-bit systems!
+ referrers.setdefault(b, []).append(8 * which_edge)
+ anyFound = True
+ which_edge += 1
+
+ for r in referrers:
+ sys.stdout.write(
+ "0x{} size = {} bytes".format(blocks[r].addr, blocks[r].req_size)
+ )
+ plural = "s" if len(referrers[r]) > 1 else ""
+ print(
+ " at byte offset"
+ + plural
+ + " "
+ + (", ".join(str(x) for x in referrers[r]))
+ )
+ print_trace_segment(args, stacks, blocks[r])
+ print("")
+
+ if args.chain_reports:
+ if len(referrers) == 0:
+ sys.stdout.write("Found no more referrers.\n")
+ break
+ if len(referrers) > 1:
+ sys.stdout.write("Found too many referrers.\n")
+ break
+
+ sys.stdout.write("Chaining to next referrer.\n\n")
+ for r in referrers:
+ block = r
+ if block in visited:
+ sys.stdout.write("Found a loop.\n")
+ break
+ visited.add(block)
+ else:
+ break
+
+ if not anyFound:
+ print("No referrers found.")
+
+
+def show_block_info(args, blocks, stacks, block):
+ b = blocks[block]
+ sys.stdout.write("block: 0x{}\n".format(b.addr))
+ sys.stdout.write("requested size: {} bytes\n".format(b.req_size))
+ sys.stdout.write("\n")
+ sys.stdout.write("block contents: ")
+ for c in b.contents:
+ v = "0" if c == 0 else blocks[c].addr
+ sys.stdout.write("0x{} ".format(v))
+ sys.stdout.write("\n\n")
+ sys.stdout.write("allocation stack:\n")
+ print_trace_segment(args, stacks, b)
+ return
+
+
+def cleanupTraceTable(args, frameTable, traceTable):
+ # Remove allocation functions at the start of traces.
+ if args.ignore_alloc_fns:
+ # Build a regexp that matches every function in allocatorFns.
+ escapedAllocatorFns = map(re.escape, allocatorFns)
+ fn_re = re.compile("|".join(escapedAllocatorFns))
+
+ # Remove allocator fns from each stack trace.
+ for traceKey, frameKeys in traceTable.items():
+ numSkippedFrames = 0
+ for frameKey in frameKeys:
+ frameDesc = frameTable[frameKey]
+ if re.search(fn_re, frameDesc):
+ numSkippedFrames += 1
+ else:
+ break
+ if numSkippedFrames > 0:
+ traceTable[traceKey] = frameKeys[numSkippedFrames:]
+
+ # Trim the number of frames.
+ for traceKey, frameKeys in traceTable.items():
+ if len(frameKeys) > args.max_frames:
+ traceTable[traceKey] = frameKeys[: args.max_frames]
+
+
+def loadGraph(options):
+ # Handle gzipped input if necessary.
+ isZipped = options.dmd_log_file_name.endswith(".gz")
+ opener = gzip.open if isZipped else open
+
+ with opener(options.dmd_log_file_name, "rb") as f:
+ j = json.load(f)
+
+ if j["version"] != outputVersion:
+ raise Exception("'version' property isn't '{:d}'".format(outputVersion))
+
+ block_list = j["blockList"]
+ blocks = {}
+
+ for json_block in block_list:
+ blocks[int(json_block["addr"], 16)] = BlockData(json_block)
+
+ traceTable = j["traceTable"]
+ frameTable = j["frameTable"]
+
+ cleanupTraceTable(options, frameTable, traceTable)
+
+ return (blocks, (traceTable, frameTable))
+
+
+def analyzeLogs():
+ options = parser.parse_args()
+
+ (blocks, stacks) = loadGraph(options)
+
+ block = int(options.block, 16)
+
+ if block not in blocks:
+ print("Object " + options.block + " not found in traces.")
+ print("It could still be the target of some nodes.")
+ return
+
+ if options.info:
+ show_block_info(options, blocks, stacks, block)
+ return
+
+ show_referrers(options, blocks, stacks, block)
+
+
+if __name__ == "__main__":
+ analyzeLogs()
diff --git a/memory/replace/dmd/dmd.py b/memory/replace/dmd/dmd.py
new file mode 100755
index 0000000000..3e20d8d6bd
--- /dev/null
+++ b/memory/replace/dmd/dmd.py
@@ -0,0 +1,1028 @@
+#! /usr/bin/env python3
+#
+# 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 script analyzes a JSON file emitted by DMD."""
+
+import argparse
+import collections
+import gzip
+import io
+import json
+import os
+import platform
+import re
+import shutil
+import sys
+import tempfile
+from bisect import bisect_right
+from functools import cmp_to_key
+from typing import Callable
+
+# The DMD output version this script handles.
+outputVersion = 5
+
+# If --ignore-alloc-fns is specified, stack frames containing functions that
+# match these strings will be removed from the *start* of stack traces. (Once
+# we hit a non-matching frame, any subsequent frames won't be removed even if
+# they do match.)
+allocatorFns = [
+ # Matches malloc, replace_malloc, moz_xmalloc, vpx_malloc, js_malloc,
+ # pod_malloc, malloc_zone_*, g_malloc.
+ "malloc",
+ # Matches calloc, replace_calloc, moz_xcalloc, vpx_calloc, js_calloc,
+ # pod_calloc, malloc_zone_calloc, pod_callocCanGC.
+ "calloc",
+ # Matches realloc, replace_realloc, moz_xrealloc, vpx_realloc, js_realloc,
+ # pod_realloc, pod_reallocCanGC.
+ "realloc",
+ # Matches memalign, posix_memalign, replace_memalign, replace_posix_memalign,
+ # moz_xmemalign, vpx_memalign, malloc_zone_memalign.
+ "memalign",
+ "operator new(",
+ "operator new[](",
+ "g_slice_alloc",
+ # This one is necessary to fully filter some sequences of allocation
+ # functions that happen in practice. Note that ??? entries that follow
+ # non-allocation functions won't be stripped, as explained above.
+ "???",
+ # Match DMD internals.
+ "mozilla::dmd::AllocCallback",
+ "mozilla::dmd::StackTrace::Get",
+]
+
+
+def cmp(a, b):
+ return (a > b) - (a < b)
+
+
+class Record(object):
+ """A record is an aggregation of heap blocks that have identical stack
+ traces. It can also be used to represent the difference between two
+ records."""
+
+ def __init__(self):
+ self.numBlocks = 0
+ self.reqSize = 0
+ self.slopSize = 0
+ self.usableSize = 0
+ self.allocatedAtDesc = None
+ self.reportedAtDescs = []
+ self.usableSizes = collections.defaultdict(int)
+
+ def isZero(self, args):
+ return (
+ self.numBlocks == 0
+ and self.reqSize == 0
+ and self.slopSize == 0
+ and self.usableSize == 0
+ and len(self.usableSizes) == 0
+ )
+
+ def negate(self):
+ self.numBlocks = -self.numBlocks
+ self.reqSize = -self.reqSize
+ self.slopSize = -self.slopSize
+ self.usableSize = -self.usableSize
+
+ negatedUsableSizes = collections.defaultdict(int)
+ for usableSize, count in self.usableSizes.items():
+ negatedUsableSizes[-usableSize] = count
+ self.usableSizes = negatedUsableSizes
+
+ def subtract(self, r):
+ # We should only be calling this on records with matching stack traces.
+ # Check this.
+ assert self.allocatedAtDesc == r.allocatedAtDesc
+ assert self.reportedAtDescs == r.reportedAtDescs
+
+ self.numBlocks -= r.numBlocks
+ self.reqSize -= r.reqSize
+ self.slopSize -= r.slopSize
+ self.usableSize -= r.usableSize
+
+ usableSizes1 = self.usableSizes
+ usableSizes2 = r.usableSizes
+ usableSizes3 = collections.defaultdict(int)
+ for usableSize in usableSizes1:
+ counts1 = usableSizes1[usableSize]
+ if usableSize in usableSizes2:
+ counts2 = usableSizes2[usableSize]
+ del usableSizes2[usableSize]
+ counts3 = counts1 - counts2
+ if counts3 != 0:
+ if counts3 < 0:
+ usableSize = -usableSize
+ counts3 = -counts3
+ usableSizes3[usableSize] = counts3
+ else:
+ usableSizes3[usableSize] = counts1
+
+ for usableSize in usableSizes2:
+ usableSizes3[-usableSize] = usableSizes2[usableSize]
+
+ self.usableSizes = usableSizes3
+
+ @staticmethod
+ def cmpByUsableSize(r1, r2):
+ # Sort by usable size, then by req size.
+ return cmp(abs(r1.usableSize), abs(r2.usableSize)) or Record.cmpByReqSize(
+ r1, r2
+ )
+
+ @staticmethod
+ def cmpByReqSize(r1, r2):
+ # Sort by req size.
+ return cmp(abs(r1.reqSize), abs(r2.reqSize))
+
+ @staticmethod
+ def cmpBySlopSize(r1, r2):
+ # Sort by slop size.
+ return cmp(abs(r1.slopSize), abs(r2.slopSize))
+
+ @staticmethod
+ def cmpByNumBlocks(r1, r2):
+ # Sort by block counts, then by usable size.
+ return cmp(abs(r1.numBlocks), abs(r2.numBlocks)) or Record.cmpByUsableSize(
+ r1, r2
+ )
+
+
+sortByChoices = {
+ "usable": Record.cmpByUsableSize, # the default
+ "req": Record.cmpByReqSize,
+ "slop": Record.cmpBySlopSize,
+ "num-blocks": Record.cmpByNumBlocks,
+}
+
+
+def parseCommandLine():
+ # 24 is the maximum number of frames that DMD will produce.
+ def range_1_24(string):
+ value = int(string)
+ if value < 1 or value > 24:
+ msg = "{:s} is not in the range 1..24".format(string)
+ raise argparse.ArgumentTypeError(msg)
+ return value
+
+ description = """
+Analyze heap data produced by DMD.
+If one file is specified, analyze it; if two files are specified, analyze the
+difference.
+Input files can be gzipped.
+Write to stdout unless -o/--output is specified.
+Stack traces are fixed to show function names, filenames and line numbers
+unless --no-fix-stacks is specified; stack fixing modifies the original file
+and may take some time. If specified, the BREAKPAD_SYMBOLS_PATH environment
+variable is used to find breakpad symbols for stack fixing.
+"""
+ p = argparse.ArgumentParser(description=description)
+
+ p.add_argument(
+ "-o",
+ "--output",
+ type=argparse.FileType("w"),
+ help="output file; stdout if unspecified",
+ )
+
+ p.add_argument(
+ "-f",
+ "--max-frames",
+ type=range_1_24,
+ default=8,
+ help="maximum number of frames to consider in each trace",
+ )
+
+ p.add_argument(
+ "-s",
+ "--sort-by",
+ choices=sortByChoices.keys(),
+ default="usable",
+ help="sort the records by a particular metric",
+ )
+
+ p.add_argument(
+ "-a",
+ "--ignore-alloc-fns",
+ action="store_true",
+ help="ignore allocation functions at the start of traces",
+ )
+
+ p.add_argument("--no-fix-stacks", action="store_true", help="do not fix stacks")
+
+ p.add_argument(
+ "--clamp-contents",
+ action="store_true",
+ help="for a scan mode log, clamp addresses to the start of live blocks, "
+ "or zero if not in one",
+ )
+
+ p.add_argument(
+ "--print-clamp-stats",
+ action="store_true",
+ help="print information about the results of pointer clamping; mostly "
+ "useful for debugging clamping",
+ )
+
+ p.add_argument(
+ "--filter-stacks-for-testing",
+ action="store_true",
+ help="filter stack traces; only useful for testing purposes",
+ )
+
+ p.add_argument(
+ "--filter",
+ default=[],
+ action="append",
+ help="Only print entries that have a stack that matches the filter. "
+ "A filter may be negated by prefixing it with `!`. "
+ "If multiple filters are specified, all of them must match.",
+ )
+
+ p.add_argument("input_file", help="a file produced by DMD")
+
+ p.add_argument(
+ "input_file2",
+ nargs="?",
+ help="a file produced by DMD; if present, it is diff'd with input_file",
+ )
+
+ return p.parse_args(sys.argv[1:])
+
+
+# Fix stacks if necessary: first write the output to a tempfile, then replace
+# the original file with it.
+def fixStackTraces(inputFilename, isZipped, opener):
+ # This append() call is needed to make the import statements work when this
+ # script is installed as a symlink.
+ sys.path.append(os.path.dirname(__file__))
+
+ bpsyms = os.environ.get("BREAKPAD_SYMBOLS_PATH", None)
+ sysname = platform.system()
+ if bpsyms and os.path.exists(bpsyms):
+ import fix_stacks as fixModule
+
+ def fix(line):
+ return fixModule.fixSymbols(line, jsonMode=True, breakpadSymsDir=bpsyms)
+
+ elif sysname in ("Linux", "Darwin", "Windows"):
+ import fix_stacks as fixModule
+
+ def fix(line):
+ return fixModule.fixSymbols(line, jsonMode=True)
+
+ else:
+ return
+
+ # Fix stacks, writing output to a temporary file, and then overwrite the
+ # original file.
+ tmpFile = tempfile.NamedTemporaryFile(delete=False)
+
+ # If the input is gzipped, then the output (written initially to |tmpFile|)
+ # should be gzipped as well.
+ #
+ # And we want to set its pre-gzipped filename to '' rather than the name of
+ # the temporary file, so that programs like the Unix 'file' utility don't
+ # say that it was called 'tmp6ozTxE' (or something like that) before it was
+ # zipped. So that explains the |filename=''| parameter.
+ #
+ # But setting the filename like that clobbers |tmpFile.name|, so we must
+ # get that now in order to move |tmpFile| at the end.
+ tmpFilename = tmpFile.name
+ if isZipped:
+ tmpFile = gzip.GzipFile(filename="", fileobj=tmpFile, mode="wb")
+
+ with opener(inputFilename, "rb") as inputFile:
+ for line in inputFile:
+ tmpFile.write(fix(line))
+
+ tmpFile.close()
+
+ shutil.move(tmpFilename, inputFilename)
+
+
+def getDigestFromFile(args, inputFile):
+ # Handle gzipped input if necessary.
+ isZipped = inputFile.endswith(".gz")
+ opener = gzip.open if isZipped else open
+
+ # Fix stack traces unless otherwise instructed.
+ if not args.no_fix_stacks:
+ fixStackTraces(inputFile, isZipped, opener)
+
+ if args.clamp_contents:
+ clampBlockList(args, inputFile, isZipped, opener)
+
+ with opener(inputFile, "rb") as f:
+ j = json.load(f)
+
+ if j["version"] != outputVersion:
+ raise Exception("'version' property isn't '{:d}'".format(outputVersion))
+
+ # Extract the main parts of the JSON object.
+ invocation = j["invocation"]
+ dmdEnvVar = invocation["dmdEnvVar"]
+ mode = invocation["mode"]
+ blockList = j["blockList"]
+ traceTable = j["traceTable"]
+ frameTable = j["frameTable"]
+
+ # Insert the necessary entries for unrecorded stack traces. Note that 'ut'
+ # and 'uf' will not overlap with any keys produced by DMD's
+ # ToIdStringConverter::Base32() function.
+ unrecordedTraceID = "ut"
+ unrecordedFrameID = "uf"
+ traceTable[unrecordedTraceID] = [unrecordedFrameID]
+ frameTable[
+ unrecordedFrameID
+ ] = "#00: (no stack trace recorded due to --stacks=partial)"
+
+ # For the purposes of this script, 'scan' behaves like 'live'.
+ if mode == "scan":
+ mode = "live"
+
+ if mode not in ["live", "dark-matter", "cumulative"]:
+ raise Exception("bad 'mode' property: '{:s}'".format(mode))
+
+ # Remove allocation functions at the start of traces.
+ if args.ignore_alloc_fns:
+ # Build a regexp that matches every function in allocatorFns.
+ escapedAllocatorFns = map(re.escape, allocatorFns)
+ fn_re = re.compile("|".join(escapedAllocatorFns))
+
+ # Remove allocator fns from each stack trace.
+ for traceKey, frameKeys in traceTable.items():
+ numSkippedFrames = 0
+ for frameKey in frameKeys:
+ frameDesc = frameTable[frameKey]
+ if re.search(fn_re, frameDesc):
+ numSkippedFrames += 1
+ else:
+ break
+ if numSkippedFrames > 0:
+ traceTable[traceKey] = frameKeys[numSkippedFrames:]
+
+ # Trim the number of frames.
+ for traceKey, frameKeys in traceTable.items():
+ if len(frameKeys) > args.max_frames:
+ del frameKeys[args.max_frames :]
+
+ def buildTraceDescription(traceTable, frameTable, traceKey):
+ frameKeys = traceTable[traceKey]
+ fmt = " #{:02d}{:}"
+
+ if args.filter_stacks_for_testing:
+ # This option is used by `test_dmd.js`, which runs the code in
+ # `SmokeDMD.cpp`. When running that test, there is too much
+ # variation in the stack traces across different machines and
+ # platforms to do exact output matching. However, every stack trace
+ # should have at least three frames that contain `DMD` (in one of
+ # `DMD.cpp`, `SmokeDMD.cpp`, `SmokeDMD`, or `SmokeDMD.exe`). Some
+ # example frames from automation (where `..` indicates excised path
+ # segments):
+ #
+ # Linux debug, with stack fixing using breakpad syms:
+ # `#01: replace_realloc(void*, unsigned long) [../dmd/DMD.cpp:1110]`
+ #
+ # Linux opt, with native stack fixing:
+ # `#02: TestFull(char const*, int, char const*, int) (../dmd/test/SmokeDMD.cpp:165)`
+ #
+ # Mac opt, with native stack fixing:
+ # `#03: RunTests() (../build/tests/bin/SmokeDMD + 0x21f9)`
+ #
+ # Windows opt, with native stack fixing failing due to a missing PDB:
+ # `#04: ??? (..\\build\\tests\\bin\\SmokeDMD.exe + 0x1c58)`
+ #
+ # If we see three such frames, we replace the entire stack trace
+ # with a single, predictable frame. This imprecise matching will at
+ # least detect if stack fixing fails completely.
+ dmd_frame_matches = 0
+ for frameKey in frameKeys:
+ frameDesc = frameTable[frameKey]
+ if "DMD" in frameDesc:
+ dmd_frame_matches += 1
+ if dmd_frame_matches >= 3:
+ return [fmt.format(1, ": ... DMD.cpp ...")]
+
+ # The frame number is always '#00' (see DMD.h for why), so we have to
+ # replace that with the correct frame number.
+ desc = []
+ for n, frameKey in enumerate(traceTable[traceKey], start=1):
+ desc.append(fmt.format(n, frameTable[frameKey][3:]))
+ return desc
+
+ # Aggregate blocks into records. All sufficiently similar blocks go into a
+ # single record.
+
+ if mode in ["live", "cumulative"]:
+ liveOrCumulativeRecords = collections.defaultdict(Record)
+ elif mode == "dark-matter":
+ unreportedRecords = collections.defaultdict(Record)
+ onceReportedRecords = collections.defaultdict(Record)
+ twiceReportedRecords = collections.defaultdict(Record)
+
+ heapUsableSize = 0
+ heapBlocks = 0
+
+ recordKeyPartCache = {}
+
+ for block in blockList:
+ # For each block we compute a |recordKey|, and all blocks with the same
+ # |recordKey| are aggregated into a single record. The |recordKey| is
+ # derived from the block's 'alloc' and 'reps' (if present) stack
+ # traces.
+ #
+ # We use frame descriptions (e.g. "#00: foo (X.cpp:99)") when comparing
+ # traces for equality. We can't use trace keys or frame keys because
+ # they're not comparable across different DMD runs (which is relevant
+ # when doing diffs).
+ #
+ # Using frame descriptions also fits in with the stack trimming done
+ # for --max-frames, which requires that stack traces with common
+ # beginnings but different endings to be considered equivalent. E.g. if
+ # we have distinct traces T1:[A:D1,B:D2,C:D3] and T2:[X:D1,Y:D2,Z:D4]
+ # and we trim the final frame of each they should be considered
+ # equivalent because the untrimmed frame descriptions (D1 and D2)
+ # match.
+ #
+ # Having said all that, during a single invocation of dmd.py on a
+ # single DMD file, for a single frameKey value the record key will
+ # always be the same, and we might encounter it 1000s of times. So we
+ # cache prior results for speed.
+ def makeRecordKeyPart(traceKey):
+ if traceKey in recordKeyPartCache:
+ return recordKeyPartCache[traceKey]
+
+ recordKeyPart = str(
+ list(map(lambda frameKey: frameTable[frameKey], traceTable[traceKey]))
+ )
+ recordKeyPartCache[traceKey] = recordKeyPart
+ return recordKeyPart
+
+ allocatedAtTraceKey = block.get("alloc", unrecordedTraceID)
+ if mode in ["live", "cumulative"]:
+ recordKey = makeRecordKeyPart(allocatedAtTraceKey)
+ records = liveOrCumulativeRecords
+ elif mode == "dark-matter":
+ recordKey = makeRecordKeyPart(allocatedAtTraceKey)
+ if "reps" in block:
+ reportedAtTraceKeys = block["reps"]
+ for reportedAtTraceKey in reportedAtTraceKeys:
+ recordKey += makeRecordKeyPart(reportedAtTraceKey)
+ if len(reportedAtTraceKeys) == 1:
+ records = onceReportedRecords
+ else:
+ records = twiceReportedRecords
+ else:
+ records = unreportedRecords
+
+ record = records[recordKey]
+
+ if "req" not in block:
+ raise Exception("'req' property missing in block'")
+
+ reqSize = block["req"]
+ slopSize = block.get("slop", 0)
+
+ if "num" in block:
+ num = block["num"]
+ else:
+ num = 1
+
+ usableSize = reqSize + slopSize
+ heapUsableSize += num * usableSize
+ heapBlocks += num
+
+ record.numBlocks += num
+ record.reqSize += num * reqSize
+ record.slopSize += num * slopSize
+ record.usableSize += num * usableSize
+ if record.allocatedAtDesc is None:
+ record.allocatedAtDesc = buildTraceDescription(
+ traceTable, frameTable, allocatedAtTraceKey
+ )
+
+ if mode in ["live", "cumulative"]:
+ pass
+ elif mode == "dark-matter":
+ if "reps" in block and record.reportedAtDescs == []:
+
+ def f(k):
+ return buildTraceDescription(traceTable, frameTable, k)
+
+ record.reportedAtDescs = list(map(f, reportedAtTraceKeys))
+ record.usableSizes[usableSize] += num
+
+ # All the processed data for a single DMD file is called a "digest".
+ digest = {}
+ digest["dmdEnvVar"] = dmdEnvVar
+ digest["mode"] = mode
+ digest["heapUsableSize"] = heapUsableSize
+ digest["heapBlocks"] = heapBlocks
+ if mode in ["live", "cumulative"]:
+ digest["liveOrCumulativeRecords"] = liveOrCumulativeRecords
+ elif mode == "dark-matter":
+ digest["unreportedRecords"] = unreportedRecords
+ digest["onceReportedRecords"] = onceReportedRecords
+ digest["twiceReportedRecords"] = twiceReportedRecords
+ return digest
+
+
+def diffRecords(args, records1, records2):
+ records3 = {}
+
+ # Process records1.
+ for k in records1:
+ r1 = records1[k]
+ if k in records2:
+ # This record is present in both records1 and records2.
+ r2 = records2[k]
+ del records2[k]
+ r2.subtract(r1)
+ if not r2.isZero(args):
+ records3[k] = r2
+ else:
+ # This record is present only in records1.
+ r1.negate()
+ records3[k] = r1
+
+ for k in records2:
+ # This record is present only in records2.
+ records3[k] = records2[k]
+
+ return records3
+
+
+def diffDigests(args, d1, d2):
+ if d1["mode"] != d2["mode"]:
+ raise Exception("the input files have different 'mode' properties")
+
+ d3 = {}
+ d3["dmdEnvVar"] = (d1["dmdEnvVar"], d2["dmdEnvVar"])
+ d3["mode"] = d1["mode"]
+ d3["heapUsableSize"] = d2["heapUsableSize"] - d1["heapUsableSize"]
+ d3["heapBlocks"] = d2["heapBlocks"] - d1["heapBlocks"]
+ if d1["mode"] in ["live", "cumulative"]:
+ d3["liveOrCumulativeRecords"] = diffRecords(
+ args, d1["liveOrCumulativeRecords"], d2["liveOrCumulativeRecords"]
+ )
+ elif d1["mode"] == "dark-matter":
+ d3["unreportedRecords"] = diffRecords(
+ args, d1["unreportedRecords"], d2["unreportedRecords"]
+ )
+ d3["onceReportedRecords"] = diffRecords(
+ args, d1["onceReportedRecords"], d2["onceReportedRecords"]
+ )
+ d3["twiceReportedRecords"] = diffRecords(
+ args, d1["twiceReportedRecords"], d2["twiceReportedRecords"]
+ )
+ return d3
+
+
+def printDigest(args, digest):
+ dmdEnvVar = digest["dmdEnvVar"]
+ mode = digest["mode"]
+ heapUsableSize = digest["heapUsableSize"]
+ heapBlocks = digest["heapBlocks"]
+ if mode in ["live", "cumulative"]:
+ liveOrCumulativeRecords = digest["liveOrCumulativeRecords"]
+ elif mode == "dark-matter":
+ unreportedRecords = digest["unreportedRecords"]
+ onceReportedRecords = digest["onceReportedRecords"]
+ twiceReportedRecords = digest["twiceReportedRecords"]
+
+ separator = "#" + "-" * 65 + "\n"
+
+ def number(n):
+ """Format a number with comma as a separator."""
+ return "{:,d}".format(n)
+
+ def perc(m, n):
+ return 0 if n == 0 else (100 * m / n)
+
+ def plural(n):
+ return "" if n == 1 else "s"
+
+ # Prints to stdout, or to file if -o/--output was specified.
+ def out(*arguments, **kwargs):
+ print(*arguments, file=args.output, **kwargs)
+
+ def printStack(traceDesc):
+ for frameDesc in traceDesc:
+ out(frameDesc)
+
+ def printRecords(recordKind, records, heapUsableSize):
+ RecordKind = recordKind.capitalize()
+ out(separator)
+ numRecords = len(records)
+ cmpRecords = sortByChoices[args.sort_by]
+ sortedRecords = sorted(
+ records.values(), key=cmp_to_key(cmpRecords), reverse=True
+ )
+ kindBlocks = 0
+ kindUsableSize = 0
+ maxRecord = 1000
+
+ def is_match(rec: Record, key: str):
+ return any(key in desc for desc in rec.allocatedAtDesc)
+
+ for arg in args.filter:
+ key: str
+ cond: Callable[[Record], bool]
+ if arg.startswith("\\"):
+ # just in case you really need to start a filter with '!' (or '\')
+ key = arg[1:]
+ cond = is_match
+ elif arg.startswith("!"):
+ key = arg[1:]
+
+ def cond(rec, key):
+ return not is_match(rec, key) # noqa: E731
+
+ else:
+ key = arg
+ cond = is_match
+ sortedRecords = [rec for rec in sortedRecords if cond(rec, key)]
+
+ # First iteration: get totals, etc.
+ for record in sortedRecords:
+ kindBlocks += record.numBlocks
+ kindUsableSize += record.usableSize
+
+ # Second iteration: print.
+ if numRecords == 0:
+ out("# no {:} heap blocks\n".format(recordKind))
+
+ kindCumulativeUsableSize = 0
+ for i, record in enumerate(sortedRecords, start=1):
+ # Stop printing at the |maxRecord|th record.
+ if i == maxRecord:
+ out(
+ "# {:}: stopping after {:,d} heap block records\n".format(
+ RecordKind, i
+ )
+ )
+ break
+
+ kindCumulativeUsableSize += record.usableSize
+
+ out(RecordKind + " {")
+ out(
+ " {:} block{:} in heap block record {:,d} of {:,d}".format(
+ number(record.numBlocks), plural(record.numBlocks), i, numRecords
+ )
+ )
+ out(
+ " {:} bytes ({:} requested / {:} slop)".format(
+ number(record.usableSize),
+ number(record.reqSize),
+ number(record.slopSize),
+ )
+ )
+
+ usableSizes = sorted(
+ record.usableSizes.items(), key=lambda x: abs(x[0]), reverse=True
+ )
+ hasSingleBlock = len(usableSizes) == 1 and usableSizes[0][1] == 1
+
+ if not hasSingleBlock:
+ out(" Individual block sizes: ", end="")
+ if len(usableSizes) == 0:
+ out("(no change)", end="")
+ else:
+ isFirst = True
+ for usableSize, count in usableSizes:
+ if not isFirst:
+ out("; ", end="")
+ out("{:}".format(number(usableSize)), end="")
+ if count > 1:
+ out(" x {:,d}".format(count), end="")
+ isFirst = False
+ out()
+
+ out(
+ " {:4.2f}% of the heap ({:4.2f}% cumulative)".format(
+ perc(record.usableSize, heapUsableSize),
+ perc(kindCumulativeUsableSize, heapUsableSize),
+ )
+ )
+ if mode in ["live", "cumulative"]:
+ pass
+ elif mode == "dark-matter":
+ out(
+ " {:4.2f}% of {:} ({:4.2f}% cumulative)".format(
+ perc(record.usableSize, kindUsableSize),
+ recordKind,
+ perc(kindCumulativeUsableSize, kindUsableSize),
+ )
+ )
+ out(" Allocated at {")
+ printStack(record.allocatedAtDesc)
+ out(" }")
+ if mode in ["live", "cumulative"]:
+ pass
+ elif mode == "dark-matter":
+ for n, reportedAtDesc in enumerate(record.reportedAtDescs):
+ again = "again " if n > 0 else ""
+ out(" Reported {:}at {{".format(again))
+ printStack(reportedAtDesc)
+ out(" }")
+ out("}\n")
+
+ return (kindUsableSize, kindBlocks)
+
+ def printInvocation(n, dmdEnvVar, mode):
+ out("Invocation{:} {{".format(n))
+ if dmdEnvVar is None:
+ out(" $DMD is undefined")
+ else:
+ out(" $DMD = '" + dmdEnvVar + "'")
+ out(" Mode = '" + mode + "'")
+ out("}\n")
+
+ # Print command line. Strip dirs so the output is deterministic, which is
+ # needed for testing.
+ out(separator, end="")
+ out("# " + " ".join(map(os.path.basename, sys.argv)) + "\n")
+
+ # Print invocation(s).
+ if type(dmdEnvVar) is not tuple:
+ printInvocation("", dmdEnvVar, mode)
+ else:
+ printInvocation(" 1", dmdEnvVar[0], mode)
+ printInvocation(" 2", dmdEnvVar[1], mode)
+
+ # Print records.
+ if mode in ["live", "cumulative"]:
+ liveOrCumulativeUsableSize, liveOrCumulativeBlocks = printRecords(
+ mode, liveOrCumulativeRecords, heapUsableSize
+ )
+ elif mode == "dark-matter":
+ twiceReportedUsableSize, twiceReportedBlocks = printRecords(
+ "twice-reported", twiceReportedRecords, heapUsableSize
+ )
+
+ unreportedUsableSize, unreportedBlocks = printRecords(
+ "unreported", unreportedRecords, heapUsableSize
+ )
+
+ onceReportedUsableSize, onceReportedBlocks = printRecords(
+ "once-reported", onceReportedRecords, heapUsableSize
+ )
+
+ # Print summary.
+ out(separator)
+ out("Summary {")
+ if mode in ["live", "cumulative"]:
+ out(
+ " Total: {:} bytes in {:} blocks".format(
+ number(liveOrCumulativeUsableSize), number(liveOrCumulativeBlocks)
+ )
+ )
+ elif mode == "dark-matter":
+ fmt = " {:15} {:>12} bytes ({:6.2f}%) in {:>7} blocks ({:6.2f}%)"
+ out(fmt.format("Total:", number(heapUsableSize), 100, number(heapBlocks), 100))
+ out(
+ fmt.format(
+ "Unreported:",
+ number(unreportedUsableSize),
+ perc(unreportedUsableSize, heapUsableSize),
+ number(unreportedBlocks),
+ perc(unreportedBlocks, heapBlocks),
+ )
+ )
+ out(
+ fmt.format(
+ "Once-reported:",
+ number(onceReportedUsableSize),
+ perc(onceReportedUsableSize, heapUsableSize),
+ number(onceReportedBlocks),
+ perc(onceReportedBlocks, heapBlocks),
+ )
+ )
+ out(
+ fmt.format(
+ "Twice-reported:",
+ number(twiceReportedUsableSize),
+ perc(twiceReportedUsableSize, heapUsableSize),
+ number(twiceReportedBlocks),
+ perc(twiceReportedBlocks, heapBlocks),
+ )
+ )
+ out("}\n")
+
+
+#############################
+# Pretty printer for DMD JSON
+#############################
+
+
+def prettyPrintDmdJson(out, j):
+ out.write("{\n")
+
+ out.write(' "version": {0},\n'.format(j["version"]))
+ out.write(' "invocation": ')
+ json.dump(j["invocation"], out, sort_keys=True)
+ out.write(",\n")
+
+ out.write(' "blockList": [')
+ first = True
+ for b in j["blockList"]:
+ out.write("" if first else ",")
+ out.write("\n ")
+ json.dump(b, out, sort_keys=True)
+ first = False
+ out.write("\n ],\n")
+
+ out.write(' "traceTable": {')
+ first = True
+ for k, l in j["traceTable"].items():
+ out.write("" if first else ",")
+ out.write('\n "{0}": {1}'.format(k, json.dumps(l)))
+ first = False
+ out.write("\n },\n")
+
+ out.write(' "frameTable": {')
+ first = True
+ for k, v in j["frameTable"].items():
+ out.write("" if first else ",")
+ out.write('\n "{0}": {1}'.format(k, json.dumps(v)))
+ first = False
+ out.write("\n }\n")
+
+ out.write("}\n")
+
+
+##################################################################
+# Code for clamping addresses using conservative pointer analysis.
+##################################################################
+
+
+# Start is the address of the first byte of the block, while end is
+# the address of the first byte after the final byte in the block.
+class AddrRange:
+ def __init__(self, block, length):
+ self.block = block
+ self.start = int(block, 16)
+ self.length = length
+ self.end = self.start + self.length
+
+ assert self.start > 0
+ assert length >= 0
+
+
+class ClampStats:
+ def __init__(self):
+ # Number of pointers already pointing to the start of a block.
+ self.startBlockPtr = 0
+
+ # Number of pointers pointing to the middle of a block. These
+ # are clamped to the start of the block they point into.
+ self.midBlockPtr = 0
+
+ # Number of null pointers.
+ self.nullPtr = 0
+
+ # Number of non-null pointers that didn't point into the middle
+ # of any blocks. These are clamped to null.
+ self.nonNullNonBlockPtr = 0
+
+ def clampedBlockAddr(self, sameAddress):
+ if sameAddress:
+ self.startBlockPtr += 1
+ else:
+ self.midBlockPtr += 1
+
+ def nullAddr(self):
+ self.nullPtr += 1
+
+ def clampedNonBlockAddr(self):
+ self.nonNullNonBlockPtr += 1
+
+ def log(self):
+ sys.stderr.write("Results:\n")
+ sys.stderr.write(
+ " Number of pointers already pointing to start of blocks: "
+ + str(self.startBlockPtr)
+ + "\n"
+ )
+ sys.stderr.write(
+ " Number of pointers clamped to start of blocks: "
+ + str(self.midBlockPtr)
+ + "\n"
+ )
+ sys.stderr.write(
+ " Number of non-null pointers not pointing into blocks "
+ "clamped to null: " + str(self.nonNullNonBlockPtr) + "\n"
+ )
+ sys.stderr.write(" Number of null pointers: " + str(self.nullPtr) + "\n")
+
+
+# Search the block ranges array for a block that address points into.
+# The search is carried out in an array of starting addresses for each blocks
+# because it is faster.
+def clampAddress(blockRanges, blockStarts, clampStats, address):
+ i = bisect_right(blockStarts, address)
+
+ # Any addresses completely out of the range should have been eliminated already.
+ assert i > 0
+ r = blockRanges[i - 1]
+ assert r.start <= address
+
+ if address >= r.end:
+ assert address < blockRanges[i].start
+ clampStats.clampedNonBlockAddr()
+ return "0"
+
+ clampStats.clampedBlockAddr(r.start == address)
+ return r.block
+
+
+def clampBlockList(args, inputFileName, isZipped, opener):
+ # XXX This isn't very efficient because we end up reading and writing
+ # the file multiple times.
+ with opener(inputFileName, "rb") as f:
+ j = json.load(f)
+
+ if j["version"] != outputVersion:
+ raise Exception("'version' property isn't '{:d}'".format(outputVersion))
+
+ # Check that the invocation is reasonable for contents clamping.
+ invocation = j["invocation"]
+ if invocation["mode"] != "scan":
+ raise Exception("Log was taken in mode " + invocation["mode"] + " not scan")
+
+ sys.stderr.write("Creating block range list.\n")
+ blockList = j["blockList"]
+ blockRanges = []
+ for block in blockList:
+ blockRanges.append(AddrRange(block["addr"], block["req"]))
+ blockRanges.sort(key=lambda r: r.start)
+
+ # Make sure there are no overlapping blocks.
+ prevRange = blockRanges[0]
+ for currRange in blockRanges[1:]:
+ assert prevRange.end <= currRange.start
+ prevRange = currRange
+
+ sys.stderr.write("Clamping block contents.\n")
+ clampStats = ClampStats()
+ firstAddr = blockRanges[0].start
+ lastAddr = blockRanges[-1].end
+
+ blockStarts = []
+ for r in blockRanges:
+ blockStarts.append(r.start)
+
+ for block in blockList:
+ # Small blocks don't have any contents.
+ if "contents" not in block:
+ continue
+
+ cont = block["contents"]
+ for i in range(len(cont)):
+ address = int(cont[i], 16)
+
+ if address == 0:
+ clampStats.nullAddr()
+ continue
+
+ # If the address is before the first block or after the last
+ # block then it can't be within a block.
+ if address < firstAddr or address >= lastAddr:
+ clampStats.clampedNonBlockAddr()
+ cont[i] = "0"
+ continue
+
+ cont[i] = clampAddress(blockRanges, blockStarts, clampStats, address)
+
+ # Remove any trailing nulls.
+ while len(cont) and cont[-1] == "0":
+ cont.pop()
+
+ if args.print_clamp_stats:
+ clampStats.log()
+
+ sys.stderr.write("Saving file.\n")
+ tmpFile = tempfile.NamedTemporaryFile(delete=False)
+ tmpFilename = tmpFile.name
+ if isZipped:
+ tmpFile = gzip.GzipFile(filename="", fileobj=tmpFile, mode="wb")
+ prettyPrintDmdJson(io.TextIOWrapper(tmpFile, encoding="utf-8"), j)
+ tmpFile.close()
+ shutil.move(tmpFilename, inputFileName)
+
+
+def main():
+ args = parseCommandLine()
+ digest = getDigestFromFile(args, args.input_file)
+ if args.input_file2:
+ digest2 = getDigestFromFile(args, args.input_file2)
+ digest = diffDigests(args, digest, digest2)
+ printDigest(args, digest)
+
+
+if __name__ == "__main__":
+ main()
diff --git a/memory/replace/dmd/moz.build b/memory/replace/dmd/moz.build
new file mode 100644
index 0000000000..6f3121df48
--- /dev/null
+++ b/memory/replace/dmd/moz.build
@@ -0,0 +1,37 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+EXPORTS += [
+ "DMD.h",
+]
+
+UNIFIED_SOURCES += [
+ "DMD.cpp",
+]
+
+if not CONFIG["MOZ_REPLACE_MALLOC_STATIC"]:
+ UNIFIED_SOURCES += [
+ "/mfbt/HashFunctions.cpp",
+ "/mfbt/JSONWriter.cpp",
+ "/mfbt/Poison.cpp",
+ "/mozglue/misc/StackWalk.cpp",
+ ]
+ if CONFIG["OS_ARCH"] == "WINNT":
+ OS_LIBS += [
+ "dbghelp",
+ ]
+
+ReplaceMalloc("dmd")
+
+DEFINES["MOZ_NO_MOZALLOC"] = True
+DEFINES["IMPL_MFBT"] = True
+
+if CONFIG["MOZ_OPTIMIZE"]:
+ DEFINES["MOZ_OPTIMIZE"] = True
+
+DisableStlWrapping()
+
+TEST_DIRS += ["test"]
diff --git a/memory/replace/dmd/test/SmokeDMD.cpp b/memory/replace/dmd/test/SmokeDMD.cpp
new file mode 100644
index 0000000000..c72e92a543
--- /dev/null
+++ b/memory/replace/dmd/test/SmokeDMD.cpp
@@ -0,0 +1,378 @@
+/* -*- 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 program is used by the DMD xpcshell test. It is run under DMD and
+// produces some output. The xpcshell test then post-processes and checks this
+// output.
+//
+// Note that this file does not have "Test" or "test" in its name, because that
+// will cause the build system to not record breakpad symbols for it, which
+// will stop the post-processing (which includes stack fixing) from working
+// correctly.
+
+// This is required on some systems such as Fedora to allow
+// building with -O0 together with --warnings-as-errors due to
+// a check in /usr/include/features.h
+#undef _FORTIFY_SOURCE
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "mozilla/Assertions.h"
+#include "mozilla/JSONWriter.h"
+#include "mozilla/Sprintf.h"
+#include "mozilla/UniquePtr.h"
+#include "DMD.h"
+
+using mozilla::MakeUnique;
+using namespace mozilla::dmd;
+
+DMDFuncs::Singleton DMDFuncs::sSingleton;
+
+class FpWriteFunc final : public mozilla::JSONWriteFunc {
+ public:
+ explicit FpWriteFunc(const char* aFilename) {
+ mFp = fopen(aFilename, "w");
+ if (!mFp) {
+ fprintf(stderr, "SmokeDMD: can't create %s file: %s\n", aFilename,
+ strerror(errno));
+ exit(1);
+ }
+ }
+
+ ~FpWriteFunc() { fclose(mFp); }
+
+ void Write(const mozilla::Span<const char>& aStr) final {
+ for (const char c : aStr) {
+ fputc(c, mFp);
+ }
+ }
+
+ private:
+ FILE* mFp;
+};
+
+// This stops otherwise-unused variables from being optimized away.
+static void UseItOrLoseIt(void* aPtr, int aSeven) {
+ char buf[64];
+ int n = SprintfLiteral(buf, "%p\n", aPtr);
+ if (n == 20 + aSeven) {
+ fprintf(stderr, "well, that is surprising");
+ }
+}
+
+// This function checks that heap blocks that have the same stack trace but
+// different (or no) reporters get aggregated separately.
+void Foo(int aSeven) {
+ char* a[6];
+ for (int i = 0; i < aSeven - 1; i++) {
+ a[i] = (char*)malloc(128 - 16 * i);
+ UseItOrLoseIt(a[i], aSeven);
+ }
+
+ // Oddly, some versions of clang will cause identical stack traces to be
+ // generated for adjacent calls to Report(), which breaks the test. Inserting
+ // the UseItOrLoseIt() calls in between is enough to prevent this.
+
+ Report(a[2]); // reported
+
+ UseItOrLoseIt(a[2], aSeven);
+
+ for (int i = 0; i < aSeven - 5; i++) {
+ Report(a[i]); // reported
+ UseItOrLoseIt(a[i], aSeven);
+ }
+
+ UseItOrLoseIt(a[2], aSeven);
+
+ Report(a[3]); // reported
+
+ // a[4], a[5] unreported
+}
+
+void TestEmpty(const char* aTestName, const char* aMode) {
+ char filename[128];
+ SprintfLiteral(filename, "complete-%s-%s.json", aTestName, aMode);
+ auto f = MakeUnique<FpWriteFunc>(filename);
+
+ char options[128];
+ SprintfLiteral(options, "--mode=%s --stacks=full", aMode);
+ ResetEverything(options);
+
+ // Zero for everything.
+ Analyze(std::move(f));
+}
+
+void TestFull(const char* aTestName, int aNum, const char* aMode, int aSeven) {
+ char filename[128];
+ SprintfLiteral(filename, "complete-%s%d-%s.json", aTestName, aNum, aMode);
+ auto f = MakeUnique<FpWriteFunc>(filename);
+
+ // The --show-dump-stats=yes is there just to give that option some basic
+ // testing, e.g. ensure it doesn't crash. It's hard to test much beyond that.
+ char options[128];
+ SprintfLiteral(options, "--mode=%s --stacks=full --show-dump-stats=yes",
+ aMode);
+ ResetEverything(options);
+
+ // Analyze 1: 1 freed, 9 out of 10 unreported.
+ // Analyze 2: still present and unreported.
+ int i;
+ char* a = nullptr;
+ for (i = 0; i < aSeven + 3; i++) {
+ a = (char*)malloc(100);
+ UseItOrLoseIt(a, aSeven);
+ }
+ free(a);
+
+ // A no-op.
+ free(nullptr);
+
+ // Note: 16 bytes is the smallest requested size that gives consistent
+ // behaviour across all platforms with jemalloc.
+ // Analyze 1: reported.
+ // Analyze 2: thrice-reported.
+ char* a2 = (char*)malloc(16);
+ Report(a2);
+
+ // Analyze 1: reported.
+ // Analyze 2: reportedness carries over, due to ReportOnAlloc.
+ char* b = (char*)malloc(10);
+ ReportOnAlloc(b);
+
+ // ReportOnAlloc, then freed.
+ // Analyze 1: freed, irrelevant.
+ // Analyze 2: freed, irrelevant.
+ char* b2 = (char*)malloc(16);
+ ReportOnAlloc(b2);
+ free(b2);
+
+ // Analyze 1: reported 4 times.
+ // Analyze 2: freed, irrelevant.
+ char* c = (char*)calloc(10, 3);
+ Report(c);
+ for (int i = 0; i < aSeven - 4; i++) {
+ Report(c);
+ }
+
+ // Analyze 1: ignored.
+ // Analyze 2: irrelevant.
+ Report((void*)(intptr_t)i);
+
+ // jemalloc rounds this up to 8192.
+ // Analyze 1: reported.
+ // Analyze 2: freed.
+ char* e = (char*)malloc(4096);
+ e = (char*)realloc(e, 7169);
+ Report(e);
+
+ // First realloc is like malloc; second realloc is shrinking.
+ // Analyze 1: reported.
+ // Analyze 2: re-reported.
+ char* e2 = (char*)realloc(nullptr, 1024);
+ e2 = (char*)realloc(e2, 512);
+ Report(e2);
+
+ // First realloc is like malloc; second realloc creates a min-sized block.
+ // XXX: on Windows, second realloc frees the block.
+ // Analyze 1: reported.
+ // Analyze 2: freed, irrelevant.
+ char* e3 = (char*)realloc(nullptr, 1023);
+ // e3 = (char*) realloc(e3, 0);
+ MOZ_ASSERT(e3);
+ Report(e3);
+
+ // Analyze 1: freed, irrelevant.
+ // Analyze 2: freed, irrelevant.
+ char* f1 = (char*)malloc(64);
+ UseItOrLoseIt(f1, aSeven);
+ free(f1);
+
+ // Analyze 1: ignored.
+ // Analyze 2: irrelevant.
+ Report((void*)(intptr_t)0x0);
+
+ // Analyze 1: mixture of reported and unreported.
+ // Analyze 2: all unreported.
+ Foo(aSeven);
+
+ // Analyze 1: twice-reported.
+ // Analyze 2: twice-reported.
+ char* g1 = (char*)malloc(77);
+ ReportOnAlloc(g1);
+ ReportOnAlloc(g1);
+
+ // Analyze 1: mixture of reported and unreported.
+ // Analyze 2: all unreported.
+ // Nb: this Foo() call is deliberately not adjacent to the previous one. See
+ // the comment about adjacent calls in Foo() for more details.
+ Foo(aSeven);
+
+ // Analyze 1: twice-reported.
+ // Analyze 2: once-reported.
+ char* g2 = (char*)malloc(78);
+ Report(g2);
+ ReportOnAlloc(g2);
+
+ // Analyze 1: twice-reported.
+ // Analyze 2: once-reported.
+ char* g3 = (char*)malloc(79);
+ ReportOnAlloc(g3);
+ Report(g3);
+
+ // All the odd-ball ones.
+ // Analyze 1: all unreported.
+ // Analyze 2: all freed, irrelevant.
+ // XXX: no memalign on Mac
+ // void* w = memalign(64, 65); // rounds up to 128
+ // UseItOrLoseIt(w, aSeven);
+
+ // XXX: posix_memalign doesn't work on B2G
+ // void* x;
+ // posix_memalign(&y, 128, 129); // rounds up to 256
+ // UseItOrLoseIt(x, aSeven);
+
+ // XXX: valloc doesn't work on Windows.
+ // void* y = valloc(1); // rounds up to 4096
+ // UseItOrLoseIt(y, aSeven);
+
+ // XXX: C11 only
+ // void* z = aligned_alloc(64, 256);
+ // UseItOrLoseIt(z, aSeven);
+
+ if (aNum == 1) {
+ // Analyze 1.
+ Analyze(std::move(f));
+ }
+
+ ClearReports();
+
+ //---------
+
+ Report(a2);
+ Report(a2);
+ free(c);
+ free(e);
+ Report(e2);
+ free(e3);
+ // free(w);
+ // free(x);
+ // free(y);
+ // free(z);
+
+ // Do some allocations that will only show up in cumulative mode.
+ for (int i = 0; i < 100; i++) {
+ void* v = malloc(128);
+ UseItOrLoseIt(v, aSeven);
+ free(v);
+ }
+
+ if (aNum == 2) {
+ // Analyze 2.
+ Analyze(std::move(f));
+ }
+}
+
+void TestPartial(const char* aTestName, const char* aMode, int aSeven) {
+ char filename[128];
+ SprintfLiteral(filename, "complete-%s-%s.json", aTestName, aMode);
+ auto f = MakeUnique<FpWriteFunc>(filename);
+
+ char options[128];
+ SprintfLiteral(options, "--mode=%s", aMode);
+ ResetEverything(options);
+
+ int kTenThousand = aSeven + 9993;
+ char* s;
+
+ // The output of this function is deterministic but it relies on the
+ // probability and seeds given to the FastBernoulliTrial instance in
+ // ResetBernoulli(). If they change, the output will change too.
+
+ // Expected fraction with stacks: (1 - (1 - 0.003) ** 16) = 0.0469.
+ // So we expect about 0.0469 * 10000 == 469.
+ // We actually get 511.
+ for (int i = 0; i < kTenThousand; i++) {
+ s = (char*)malloc(16);
+ UseItOrLoseIt(s, aSeven);
+ }
+
+ // Expected fraction with stacks: (1 - (1 - 0.003) ** 128) = 0.3193.
+ // So we expect about 0.3193 * 10000 == 3193.
+ // We actually get 3136.
+ for (int i = 0; i < kTenThousand; i++) {
+ s = (char*)malloc(128);
+ UseItOrLoseIt(s, aSeven);
+ }
+
+ // Expected fraction with stacks: (1 - (1 - 0.003) ** 1024) = 0.9539.
+ // So we expect about 0.9539 * 10000 == 9539.
+ // We actually get 9531.
+ for (int i = 0; i < kTenThousand; i++) {
+ s = (char*)malloc(1024);
+ UseItOrLoseIt(s, aSeven);
+ }
+
+ Analyze(std::move(f));
+}
+
+void TestScan(int aSeven) {
+ auto f = MakeUnique<FpWriteFunc>("basic-scan.json");
+
+ ResetEverything("--mode=scan");
+
+ uintptr_t* p = (uintptr_t*)malloc(6 * sizeof(uintptr_t));
+ UseItOrLoseIt(p, aSeven);
+
+ // Hard-coded values checked by scan-test.py
+ p[0] = 0x123; // outside a block, small value
+ p[1] = 0x0; // null
+ p[2] = (uintptr_t)((uint8_t*)p - 1); // pointer outside a block, but nearby
+ p[3] = (uintptr_t)p; // pointer to start of a block
+ p[4] = (uintptr_t)((uint8_t*)p + 1); // pointer into a block
+ p[5] = 0x0; // trailing null
+
+ Analyze(std::move(f));
+}
+
+void RunTests() {
+ // This test relies on the compiler not doing various optimizations, such as
+ // eliding unused malloc() calls or unrolling loops with fixed iteration
+ // counts. So we compile it with -O0 (or equivalent), which probably prevents
+ // that. We also use the following variable for various loop iteration
+ // counts, just in case compilers might unroll very small loops even with
+ // -O0.
+ int seven = 7;
+
+ // Make sure that DMD is actually running; it is initialized on the first
+ // allocation.
+ int* x = (int*)malloc(100);
+ UseItOrLoseIt(x, seven);
+ MOZ_RELEASE_ASSERT(IsRunning());
+
+ // Please keep this in sync with run_test in test_dmd.js.
+
+ TestEmpty("empty", "live");
+ TestEmpty("empty", "dark-matter");
+ TestEmpty("empty", "cumulative");
+
+ TestFull("full", 1, "live", seven);
+ TestFull("full", 1, "dark-matter", seven);
+
+ TestFull("full", 2, "dark-matter", seven);
+ TestFull("full", 2, "cumulative", seven);
+
+ TestPartial("partial", "live", seven);
+
+ TestScan(seven);
+}
+
+int main() {
+ RunTests();
+
+ return 0;
+}
diff --git a/memory/replace/dmd/test/basic-scan-32-expected.txt b/memory/replace/dmd/test/basic-scan-32-expected.txt
new file mode 100644
index 0000000000..9f6f4db325
--- /dev/null
+++ b/memory/replace/dmd/test/basic-scan-32-expected.txt
@@ -0,0 +1,25 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o basic-scan-32-actual.txt --clamp-contents basic-scan.json
+
+Invocation {
+ $DMD = '--mode=scan'
+ Mode = 'live'
+}
+
+#-----------------------------------------------------------------
+
+Live {
+ 1 block in heap block record 1 of 1
+ 32 bytes (24 requested / 8 slop)
+ 100.00% of the heap (100.00% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: 32 bytes in 1 blocks
+}
+
diff --git a/memory/replace/dmd/test/basic-scan-64-expected.txt b/memory/replace/dmd/test/basic-scan-64-expected.txt
new file mode 100644
index 0000000000..59effc07b7
--- /dev/null
+++ b/memory/replace/dmd/test/basic-scan-64-expected.txt
@@ -0,0 +1,25 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o basic-scan-64-actual.txt --clamp-contents basic-scan.json
+
+Invocation {
+ $DMD = '--mode=scan'
+ Mode = 'live'
+}
+
+#-----------------------------------------------------------------
+
+Live {
+ 1 block in heap block record 1 of 1
+ 48 bytes (48 requested / 0 slop)
+ 100.00% of the heap (100.00% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: 48 bytes in 1 blocks
+}
+
diff --git a/memory/replace/dmd/test/complete-empty-cumulative-expected.txt b/memory/replace/dmd/test/complete-empty-cumulative-expected.txt
new file mode 100644
index 0000000000..2486015d0b
--- /dev/null
+++ b/memory/replace/dmd/test/complete-empty-cumulative-expected.txt
@@ -0,0 +1,18 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o complete-empty-cumulative-actual.txt complete-empty-cumulative.json
+
+Invocation {
+ $DMD = '--mode=cumulative --stacks=full'
+ Mode = 'cumulative'
+}
+
+#-----------------------------------------------------------------
+
+# no cumulative heap blocks
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: 0 bytes in 0 blocks
+}
+
diff --git a/memory/replace/dmd/test/complete-empty-dark-matter-expected.txt b/memory/replace/dmd/test/complete-empty-dark-matter-expected.txt
new file mode 100644
index 0000000000..0020cddde3
--- /dev/null
+++ b/memory/replace/dmd/test/complete-empty-dark-matter-expected.txt
@@ -0,0 +1,29 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o complete-empty-dark-matter-actual.txt complete-empty-dark-matter.json
+
+Invocation {
+ $DMD = '--mode=dark-matter --stacks=full'
+ Mode = 'dark-matter'
+}
+
+#-----------------------------------------------------------------
+
+# no twice-reported heap blocks
+
+#-----------------------------------------------------------------
+
+# no unreported heap blocks
+
+#-----------------------------------------------------------------
+
+# no once-reported heap blocks
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: 0 bytes (100.00%) in 0 blocks (100.00%)
+ Unreported: 0 bytes ( 0.00%) in 0 blocks ( 0.00%)
+ Once-reported: 0 bytes ( 0.00%) in 0 blocks ( 0.00%)
+ Twice-reported: 0 bytes ( 0.00%) in 0 blocks ( 0.00%)
+}
+
diff --git a/memory/replace/dmd/test/complete-empty-live-expected.txt b/memory/replace/dmd/test/complete-empty-live-expected.txt
new file mode 100644
index 0000000000..d0d1721965
--- /dev/null
+++ b/memory/replace/dmd/test/complete-empty-live-expected.txt
@@ -0,0 +1,18 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o complete-empty-live-actual.txt complete-empty-live.json
+
+Invocation {
+ $DMD = '--mode=live --stacks=full'
+ Mode = 'live'
+}
+
+#-----------------------------------------------------------------
+
+# no live heap blocks
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: 0 bytes in 0 blocks
+}
+
diff --git a/memory/replace/dmd/test/complete-full1-dark-matter-expected.txt b/memory/replace/dmd/test/complete-full1-dark-matter-expected.txt
new file mode 100644
index 0000000000..2c7d6b6343
--- /dev/null
+++ b/memory/replace/dmd/test/complete-full1-dark-matter-expected.txt
@@ -0,0 +1,265 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o complete-full1-dark-matter-actual.txt complete-full1-dark-matter.json
+
+Invocation {
+ $DMD = '--mode=dark-matter --stacks=full --show-dump-stats=yes'
+ Mode = 'dark-matter'
+}
+
+#-----------------------------------------------------------------
+
+Twice-reported {
+ 1 block in heap block record 1 of 4
+ 80 bytes (79 requested / 1 slop)
+ 0.66% of the heap (0.66% cumulative)
+ 29.41% of twice-reported (29.41% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+ Reported again at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Twice-reported {
+ 1 block in heap block record 2 of 4
+ 80 bytes (78 requested / 2 slop)
+ 0.66% of the heap (1.32% cumulative)
+ 29.41% of twice-reported (58.82% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+ Reported again at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Twice-reported {
+ 1 block in heap block record 3 of 4
+ 80 bytes (77 requested / 3 slop)
+ 0.66% of the heap (1.98% cumulative)
+ 29.41% of twice-reported (88.24% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+ Reported again at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Twice-reported {
+ 1 block in heap block record 4 of 4
+ 32 bytes (30 requested / 2 slop)
+ 0.26% of the heap (2.25% cumulative)
+ 11.76% of twice-reported (100.00% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+ Reported again at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+#-----------------------------------------------------------------
+
+Unreported {
+ 9 blocks in heap block record 1 of 3
+ 1,008 bytes (900 requested / 108 slop)
+ Individual block sizes: 112 x 9
+ 8.33% of the heap (8.33% cumulative)
+ 81.82% of unreported (81.82% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Unreported {
+ 2 blocks in heap block record 2 of 3
+ 112 bytes (112 requested / 0 slop)
+ Individual block sizes: 64; 48
+ 0.93% of the heap (9.26% cumulative)
+ 9.09% of unreported (90.91% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Unreported {
+ 2 blocks in heap block record 3 of 3
+ 112 bytes (112 requested / 0 slop)
+ Individual block sizes: 64; 48
+ 0.93% of the heap (10.19% cumulative)
+ 9.09% of unreported (100.00% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+#-----------------------------------------------------------------
+
+Once-reported {
+ 1 block in heap block record 1 of 11
+ 8,192 bytes (7,169 requested / 1,023 slop)
+ 67.72% of the heap (67.72% cumulative)
+ 77.34% of once-reported (77.34% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Once-reported {
+ 1 block in heap block record 2 of 11
+ 1,024 bytes (1,023 requested / 1 slop)
+ 8.47% of the heap (76.19% cumulative)
+ 9.67% of once-reported (87.01% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Once-reported {
+ 1 block in heap block record 3 of 11
+ 512 bytes (512 requested / 0 slop)
+ 4.23% of the heap (80.42% cumulative)
+ 4.83% of once-reported (91.84% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Once-reported {
+ 2 blocks in heap block record 4 of 11
+ 240 bytes (240 requested / 0 slop)
+ Individual block sizes: 128; 112
+ 1.98% of the heap (82.41% cumulative)
+ 2.27% of once-reported (94.11% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Once-reported {
+ 2 blocks in heap block record 5 of 11
+ 240 bytes (240 requested / 0 slop)
+ Individual block sizes: 128; 112
+ 1.98% of the heap (84.39% cumulative)
+ 2.27% of once-reported (96.37% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Once-reported {
+ 1 block in heap block record 6 of 11
+ 96 bytes (96 requested / 0 slop)
+ 0.79% of the heap (85.19% cumulative)
+ 0.91% of once-reported (97.28% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Once-reported {
+ 1 block in heap block record 7 of 11
+ 96 bytes (96 requested / 0 slop)
+ 0.79% of the heap (85.98% cumulative)
+ 0.91% of once-reported (98.19% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Once-reported {
+ 1 block in heap block record 8 of 11
+ 80 bytes (80 requested / 0 slop)
+ 0.66% of the heap (86.64% cumulative)
+ 0.76% of once-reported (98.94% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Once-reported {
+ 1 block in heap block record 9 of 11
+ 80 bytes (80 requested / 0 slop)
+ 0.66% of the heap (87.30% cumulative)
+ 0.76% of once-reported (99.70% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Once-reported {
+ 1 block in heap block record 10 of 11
+ 16 bytes (16 requested / 0 slop)
+ 0.13% of the heap (87.43% cumulative)
+ 0.15% of once-reported (99.85% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Once-reported {
+ 1 block in heap block record 11 of 11
+ 16 bytes (10 requested / 6 slop)
+ 0.13% of the heap (87.57% cumulative)
+ 0.15% of once-reported (100.00% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: 12,096 bytes (100.00%) in 30 blocks (100.00%)
+ Unreported: 1,232 bytes ( 10.19%) in 13 blocks ( 43.33%)
+ Once-reported: 10,592 bytes ( 87.57%) in 13 blocks ( 43.33%)
+ Twice-reported: 272 bytes ( 2.25%) in 4 blocks ( 13.33%)
+}
+
diff --git a/memory/replace/dmd/test/complete-full1-live-expected.txt b/memory/replace/dmd/test/complete-full1-live-expected.txt
new file mode 100644
index 0000000000..eaa1883e1f
--- /dev/null
+++ b/memory/replace/dmd/test/complete-full1-live-expected.txt
@@ -0,0 +1,127 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o complete-full1-live-actual.txt complete-full1-live.json
+
+Invocation {
+ $DMD = '--mode=live --stacks=full --show-dump-stats=yes'
+ Mode = 'live'
+}
+
+#-----------------------------------------------------------------
+
+Live {
+ 1 block in heap block record 1 of 12
+ 8,192 bytes (7,169 requested / 1,023 slop)
+ 67.72% of the heap (67.72% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Live {
+ 1 block in heap block record 2 of 12
+ 1,024 bytes (1,023 requested / 1 slop)
+ 8.47% of the heap (76.19% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Live {
+ 9 blocks in heap block record 3 of 12
+ 1,008 bytes (900 requested / 108 slop)
+ Individual block sizes: 112 x 9
+ 8.33% of the heap (84.52% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Live {
+ 6 blocks in heap block record 4 of 12
+ 528 bytes (528 requested / 0 slop)
+ Individual block sizes: 128; 112; 96; 80; 64; 48
+ 4.37% of the heap (88.89% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Live {
+ 6 blocks in heap block record 5 of 12
+ 528 bytes (528 requested / 0 slop)
+ Individual block sizes: 128; 112; 96; 80; 64; 48
+ 4.37% of the heap (93.25% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Live {
+ 1 block in heap block record 6 of 12
+ 512 bytes (512 requested / 0 slop)
+ 4.23% of the heap (97.49% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Live {
+ 1 block in heap block record 7 of 12
+ 80 bytes (79 requested / 1 slop)
+ 0.66% of the heap (98.15% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Live {
+ 1 block in heap block record 8 of 12
+ 80 bytes (78 requested / 2 slop)
+ 0.66% of the heap (98.81% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Live {
+ 1 block in heap block record 9 of 12
+ 80 bytes (77 requested / 3 slop)
+ 0.66% of the heap (99.47% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Live {
+ 1 block in heap block record 10 of 12
+ 32 bytes (30 requested / 2 slop)
+ 0.26% of the heap (99.74% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Live {
+ 1 block in heap block record 11 of 12
+ 16 bytes (16 requested / 0 slop)
+ 0.13% of the heap (99.87% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Live {
+ 1 block in heap block record 12 of 12
+ 16 bytes (10 requested / 6 slop)
+ 0.13% of the heap (100.00% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: 12,096 bytes in 30 blocks
+}
+
diff --git a/memory/replace/dmd/test/complete-full2-cumulative-expected.txt b/memory/replace/dmd/test/complete-full2-cumulative-expected.txt
new file mode 100644
index 0000000000..5a225b9b8e
--- /dev/null
+++ b/memory/replace/dmd/test/complete-full2-cumulative-expected.txt
@@ -0,0 +1,173 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o complete-full2-cumulative-actual.txt complete-full2-cumulative.json
+
+Invocation {
+ $DMD = '--mode=cumulative --stacks=full --show-dump-stats=yes'
+ Mode = 'cumulative'
+}
+
+#-----------------------------------------------------------------
+
+Cumulative {
+ 100 blocks in heap block record 1 of 17
+ 12,800 bytes (12,800 requested / 0 slop)
+ Individual block sizes: 128 x 100
+ 42.37% of the heap (42.37% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Cumulative {
+ 1 block in heap block record 2 of 17
+ 8,192 bytes (7,169 requested / 1,023 slop)
+ 27.12% of the heap (69.49% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Cumulative {
+ 1 block in heap block record 3 of 17
+ 4,096 bytes (4,096 requested / 0 slop)
+ 13.56% of the heap (83.05% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Cumulative {
+ 10 blocks in heap block record 4 of 17
+ 1,120 bytes (1,000 requested / 120 slop)
+ Individual block sizes: 112 x 10
+ 3.71% of the heap (86.76% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Cumulative {
+ 1 block in heap block record 5 of 17
+ 1,024 bytes (1,024 requested / 0 slop)
+ 3.39% of the heap (90.15% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Cumulative {
+ 1 block in heap block record 6 of 17
+ 1,024 bytes (1,023 requested / 1 slop)
+ 3.39% of the heap (93.54% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Cumulative {
+ 6 blocks in heap block record 7 of 17
+ 528 bytes (528 requested / 0 slop)
+ Individual block sizes: 128; 112; 96; 80; 64; 48
+ 1.75% of the heap (95.29% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Cumulative {
+ 6 blocks in heap block record 8 of 17
+ 528 bytes (528 requested / 0 slop)
+ Individual block sizes: 128; 112; 96; 80; 64; 48
+ 1.75% of the heap (97.03% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Cumulative {
+ 1 block in heap block record 9 of 17
+ 512 bytes (512 requested / 0 slop)
+ 1.69% of the heap (98.73% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Cumulative {
+ 1 block in heap block record 10 of 17
+ 80 bytes (79 requested / 1 slop)
+ 0.26% of the heap (98.99% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Cumulative {
+ 1 block in heap block record 11 of 17
+ 80 bytes (78 requested / 2 slop)
+ 0.26% of the heap (99.26% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Cumulative {
+ 1 block in heap block record 12 of 17
+ 80 bytes (77 requested / 3 slop)
+ 0.26% of the heap (99.52% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Cumulative {
+ 1 block in heap block record 13 of 17
+ 64 bytes (64 requested / 0 slop)
+ 0.21% of the heap (99.74% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Cumulative {
+ 1 block in heap block record 14 of 17
+ 32 bytes (30 requested / 2 slop)
+ 0.11% of the heap (99.84% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Cumulative {
+ 1 block in heap block record 15 of 17
+ 16 bytes (16 requested / 0 slop)
+ 0.05% of the heap (99.89% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Cumulative {
+ 1 block in heap block record 16 of 17
+ 16 bytes (16 requested / 0 slop)
+ 0.05% of the heap (99.95% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Cumulative {
+ 1 block in heap block record 17 of 17
+ 16 bytes (10 requested / 6 slop)
+ 0.05% of the heap (100.00% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: 30,208 bytes in 135 blocks
+}
+
diff --git a/memory/replace/dmd/test/complete-full2-dark-matter-expected.txt b/memory/replace/dmd/test/complete-full2-dark-matter-expected.txt
new file mode 100644
index 0000000000..5f9585a8c6
--- /dev/null
+++ b/memory/replace/dmd/test/complete-full2-dark-matter-expected.txt
@@ -0,0 +1,140 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o complete-full2-dark-matter-actual.txt complete-full2-dark-matter.json
+
+Invocation {
+ $DMD = '--mode=dark-matter --stacks=full --show-dump-stats=yes'
+ Mode = 'dark-matter'
+}
+
+#-----------------------------------------------------------------
+
+Twice-reported {
+ 1 block in heap block record 1 of 2
+ 80 bytes (77 requested / 3 slop)
+ 2.81% of the heap (2.81% cumulative)
+ 83.33% of twice-reported (83.33% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+ Reported again at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Twice-reported {
+ 1 block in heap block record 2 of 2
+ 16 bytes (16 requested / 0 slop)
+ 0.56% of the heap (3.37% cumulative)
+ 16.67% of twice-reported (100.00% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+ Reported again at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+#-----------------------------------------------------------------
+
+Unreported {
+ 9 blocks in heap block record 1 of 3
+ 1,008 bytes (900 requested / 108 slop)
+ Individual block sizes: 112 x 9
+ 35.39% of the heap (35.39% cumulative)
+ 48.84% of unreported (48.84% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Unreported {
+ 6 blocks in heap block record 2 of 3
+ 528 bytes (528 requested / 0 slop)
+ Individual block sizes: 128; 112; 96; 80; 64; 48
+ 18.54% of the heap (53.93% cumulative)
+ 25.58% of unreported (74.42% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Unreported {
+ 6 blocks in heap block record 3 of 3
+ 528 bytes (528 requested / 0 slop)
+ Individual block sizes: 128; 112; 96; 80; 64; 48
+ 18.54% of the heap (72.47% cumulative)
+ 25.58% of unreported (100.00% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+#-----------------------------------------------------------------
+
+Once-reported {
+ 1 block in heap block record 1 of 4
+ 512 bytes (512 requested / 0 slop)
+ 17.98% of the heap (17.98% cumulative)
+ 74.42% of once-reported (74.42% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Once-reported {
+ 1 block in heap block record 2 of 4
+ 80 bytes (79 requested / 1 slop)
+ 2.81% of the heap (20.79% cumulative)
+ 11.63% of once-reported (86.05% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Once-reported {
+ 1 block in heap block record 3 of 4
+ 80 bytes (78 requested / 2 slop)
+ 2.81% of the heap (23.60% cumulative)
+ 11.63% of once-reported (97.67% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Once-reported {
+ 1 block in heap block record 4 of 4
+ 16 bytes (10 requested / 6 slop)
+ 0.56% of the heap (24.16% cumulative)
+ 2.33% of once-reported (100.00% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+ Reported at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: 2,848 bytes (100.00%) in 27 blocks (100.00%)
+ Unreported: 2,064 bytes ( 72.47%) in 21 blocks ( 77.78%)
+ Once-reported: 688 bytes ( 24.16%) in 4 blocks ( 14.81%)
+ Twice-reported: 96 bytes ( 3.37%) in 2 blocks ( 7.41%)
+}
+
diff --git a/memory/replace/dmd/test/complete-partial-live-expected.txt b/memory/replace/dmd/test/complete-partial-live-expected.txt
new file mode 100644
index 0000000000..e7f27b0ee6
--- /dev/null
+++ b/memory/replace/dmd/test/complete-partial-live-expected.txt
@@ -0,0 +1,56 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o complete-partial-live-actual.txt complete-partial-live.json
+
+Invocation {
+ $DMD = '--mode=live'
+ Mode = 'live'
+}
+
+#-----------------------------------------------------------------
+
+Live {
+ 9,531 blocks in heap block record 1 of 4
+ 9,759,744 bytes (9,759,744 requested / 0 slop)
+ Individual block sizes: 1,024 x 9,531
+ 83.56% of the heap (83.56% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Live {
+ 16,822 blocks in heap block record 2 of 4
+ 1,510,672 bytes (1,510,672 requested / 0 slop)
+ Individual block sizes: 1,024 x 469; 128 x 6,864; 16 x 9,489
+ 12.93% of the heap (96.49% cumulative)
+ Allocated at {
+ #01: (no stack trace recorded due to --stacks=partial)
+ }
+}
+
+Live {
+ 3,136 blocks in heap block record 3 of 4
+ 401,408 bytes (401,408 requested / 0 slop)
+ Individual block sizes: 128 x 3,136
+ 3.44% of the heap (99.93% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+Live {
+ 511 blocks in heap block record 4 of 4
+ 8,176 bytes (8,176 requested / 0 slop)
+ Individual block sizes: 16 x 511
+ 0.07% of the heap (100.00% cumulative)
+ Allocated at {
+ #01: ... DMD.cpp ...
+ }
+}
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: 11,680,000 bytes in 30,000 blocks
+}
+
diff --git a/memory/replace/dmd/test/moz.build b/memory/replace/dmd/test/moz.build
new file mode 100644
index 0000000000..77e4fa12a0
--- /dev/null
+++ b/memory/replace/dmd/test/moz.build
@@ -0,0 +1,26 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+GeckoSimplePrograms(
+ [
+ "SmokeDMD",
+ ],
+ linkage=None,
+)
+
+# See the comment at the top of SmokeDMD.cpp:RunTests().
+if CONFIG["CC_TYPE"] == "clang-cl":
+ CXXFLAGS += ["-Od", "-clang:-fno-lto"]
+else:
+ CXXFLAGS += ["-O0", "-fno-lto"]
+
+DEFINES["MOZ_NO_MOZALLOC"] = True
+
+DisableStlWrapping()
+
+XPCSHELL_TESTS_MANIFESTS += [
+ "xpcshell.toml",
+]
diff --git a/memory/replace/dmd/test/scan-test.py b/memory/replace/dmd/test/scan-test.py
new file mode 100644
index 0000000000..c282b02693
--- /dev/null
+++ b/memory/replace/dmd/test/scan-test.py
@@ -0,0 +1,102 @@
+#! /usr/bin/env python
+#
+# 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/.
+
+"""Testing for the JSON file emitted by DMD heap scan mode when running SmokeDMD."""
+
+import argparse
+import gzip
+import json
+import sys
+
+# The DMD output version this script handles.
+outputVersion = 5
+
+
+def parseCommandLine():
+ description = """
+Ensure that DMD heap scan mode creates the correct output when run with SmokeDMD.
+This is only for testing. Input files can be gzipped.
+"""
+ p = argparse.ArgumentParser(description=description)
+
+ p.add_argument(
+ "--clamp-contents",
+ action="store_true",
+ help="expect that the contents of the JSON input file have had "
+ "their addresses clamped",
+ )
+
+ p.add_argument("input_file", help="a file produced by DMD")
+
+ return p.parse_args(sys.argv[1:])
+
+
+def checkScanContents(contents, expected):
+ if len(contents) != len(expected):
+ raise Exception(
+ "Expected "
+ + str(len(expected))
+ + " things in contents but found "
+ + str(len(contents))
+ )
+
+ for i in range(len(expected)):
+ if contents[i] != expected[i]:
+ raise Exception(
+ "Expected to find "
+ + expected[i]
+ + " at offset "
+ + str(i)
+ + " but found "
+ + contents[i]
+ )
+
+
+def main():
+ args = parseCommandLine()
+
+ # Handle gzipped input if necessary.
+ isZipped = args.input_file.endswith(".gz")
+ opener = gzip.open if isZipped else open
+
+ with opener(args.input_file, "rb") as f:
+ j = json.load(f)
+
+ if j["version"] != outputVersion:
+ raise Exception("'version' property isn't '{:d}'".format(outputVersion))
+
+ invocation = j["invocation"]
+
+ mode = invocation["mode"]
+ if mode != "scan":
+ raise Exception("bad 'mode' property: '{:s}'".format(mode))
+
+ blockList = j["blockList"]
+
+ if len(blockList) != 1:
+ raise Exception("Expected only one block")
+
+ b = blockList[0]
+
+ # The expected values are based on hard-coded values in SmokeDMD.cpp.
+ if args.clamp_contents:
+ expected = ["0", "0", "0", b["addr"], b["addr"]]
+ else:
+ addr = int(b["addr"], 16)
+ expected = [
+ "123",
+ "0",
+ str(format(addr - 1, "x")),
+ b["addr"],
+ str(format(addr + 1, "x")),
+ "0",
+ ]
+
+ checkScanContents(b["contents"], expected)
+
+
+if __name__ == "__main__":
+ main()
diff --git a/memory/replace/dmd/test/script-diff-dark-matter-expected.txt b/memory/replace/dmd/test/script-diff-dark-matter-expected.txt
new file mode 100644
index 0000000000..b1fc28bac5
--- /dev/null
+++ b/memory/replace/dmd/test/script-diff-dark-matter-expected.txt
@@ -0,0 +1,127 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o script-diff-dark-matter-actual.txt script-diff-dark-matter1.json script-diff-dark-matter2.json
+
+Invocation 1 {
+ $DMD = '--mode=dark-matter'
+ Mode = 'dark-matter'
+}
+
+Invocation 2 {
+ $DMD = '1'
+ Mode = 'dark-matter'
+}
+
+#-----------------------------------------------------------------
+
+Twice-reported {
+ -1 blocks in heap block record 1 of 1
+ -1,088 bytes (-1,064 requested / -24 slop)
+ Individual block sizes: -1,024; -127; 63
+ 15.46% of the heap (15.46% cumulative)
+ 100.00% of twice-reported (100.00% cumulative)
+ Allocated at {
+ #01: F (F.cpp:99)
+ }
+ Reported at {
+ #01: R1 (R1.cpp:99)
+ }
+ Reported again at {
+ #01: R2 (R2.cpp:99)
+ }
+}
+
+#-----------------------------------------------------------------
+
+Unreported {
+ 4 blocks in heap block record 1 of 5
+ 16,384 bytes (16,384 requested / 0 slop)
+ Individual block sizes: 4,096 x 4
+ -232.76% of the heap (-232.76% cumulative)
+ 371.01% of unreported (371.01% cumulative)
+ Allocated at {
+ #01: E (E.cpp:99)
+ }
+}
+
+Unreported {
+ 7 blocks in heap block record 2 of 5
+ -11,968 bytes (-12,016 requested / 48 slop)
+ Individual block sizes: -15,360; 2,048; 512 x 2; 128; -127; 64 x 4; 63
+ 170.02% of the heap (-62.74% cumulative)
+ -271.01% of unreported (100.00% cumulative)
+ Allocated at {
+ #01: F (F.cpp:99)
+ }
+}
+
+Unreported {
+ 0 blocks in heap block record 3 of 5
+ 0 bytes (-384 requested / 384 slop)
+ Individual block sizes: (no change)
+ -0.00% of the heap (-62.74% cumulative)
+ 0.00% of unreported (100.00% cumulative)
+ Allocated at {
+ #01: C (C.cpp:99)
+ }
+}
+
+Unreported {
+ -2 blocks in heap block record 4 of 5
+ 0 bytes (0 requested / 0 slop)
+ Individual block sizes: 8,192 x 2; -4,096 x 4
+ -0.00% of the heap (-62.74% cumulative)
+ 0.00% of unreported (100.00% cumulative)
+ Allocated at {
+ #01: B (B.cpp:99)
+ }
+}
+
+Unreported {
+ 0 blocks in heap block record 5 of 5
+ 0 bytes (0 requested / 0 slop)
+ Individual block sizes: 20,480; -16,384; -8,192; 4,096
+ -0.00% of the heap (-62.74% cumulative)
+ 0.00% of unreported (100.00% cumulative)
+ Allocated at {
+ #01: (no stack trace recorded due to --stacks=partial)
+ }
+}
+
+#-----------------------------------------------------------------
+
+Once-reported {
+ -3 blocks in heap block record 1 of 2
+ -10,240 bytes (-10,192 requested / -48 slop)
+ Individual block sizes: -4,096 x 2; -2,048
+ 145.48% of the heap (145.48% cumulative)
+ 98.77% of once-reported (98.77% cumulative)
+ Allocated at {
+ #01: D (D.cpp:99)
+ }
+ Reported at {
+ #01: R1 (R1.cpp:99)
+ }
+}
+
+Once-reported {
+ -1 blocks in heap block record 2 of 2
+ -127 bytes (-151 requested / 24 slop)
+ 1.80% of the heap (147.28% cumulative)
+ 1.23% of once-reported (100.00% cumulative)
+ Allocated at {
+ #01: F (F.cpp:99)
+ }
+ Reported at {
+ #01: R1 (R1.cpp:99)
+ }
+}
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: -7,039 bytes (100.00%) in 4 blocks (100.00%)
+ Unreported: 4,416 bytes (-62.74%) in 9 blocks (225.00%)
+ Once-reported: -10,367 bytes (147.28%) in -4 blocks (-100.00%)
+ Twice-reported: -1,088 bytes ( 15.46%) in -1 blocks (-25.00%)
+}
+
diff --git a/memory/replace/dmd/test/script-diff-dark-matter1.json b/memory/replace/dmd/test/script-diff-dark-matter1.json
new file mode 100644
index 0000000000..1175394150
--- /dev/null
+++ b/memory/replace/dmd/test/script-diff-dark-matter1.json
@@ -0,0 +1,51 @@
+{
+ "version": 5,
+ "invocation": {
+ "dmdEnvVar": "--mode=dark-matter",
+ "mode": "dark-matter"
+ },
+ "blockList": [
+ { "req": 4096, "alloc": "A", "num": 4 },
+
+ { "req": 4096, "alloc": "B", "num": 3 },
+ { "req": 4096, "alloc": "B" },
+
+ { "req": 4096, "alloc": "C", "num": 2 },
+ { "req": 4096, "alloc": "C", "num": 2 },
+
+ { "req": 4096, "alloc": "D", "reps": ["R1"], "num": 2 },
+ { "req": 2000, "slop": 48, "alloc": "D", "reps": ["R1"] },
+
+ { "req": 15360, "alloc": "F" },
+ { "req": 512, "alloc": "F", "num": 2 },
+ { "req": 127, "alloc": "F" },
+ { "req": 1024, "alloc": "F", "reps": ["R1"] },
+ { "req": 127, "alloc": "F", "reps": ["R1"] },
+ { "req": 1000, "slop": 24, "alloc": "F", "reps": ["R1", "R2"] },
+ { "req": 127, "alloc": "F", "reps": ["R1", "R2"] },
+
+ { "req": 4096 },
+ { "req": 8192 },
+ { "req": 16384 }
+ ],
+ "traceTable": {
+ "A": ["AA"],
+ "B": ["BB"],
+ "C": ["CC"],
+ "D": ["DD"],
+ "E": ["EE"],
+ "F": ["FF"],
+ "R1": ["RR1"],
+ "R2": ["RR2"]
+ },
+ "frameTable": {
+ "AA": "#00: A (A.cpp:99)",
+ "BB": "#00: B (B.cpp:99)",
+ "CC": "#00: C (C.cpp:99)",
+ "DD": "#00: D (D.cpp:99)",
+ "EE": "#00: E (E.cpp:99)",
+ "FF": "#00: F (F.cpp:99)",
+ "RR1": "#00: R1 (R1.cpp:99)",
+ "RR2": "#00: R2 (R2.cpp:99)"
+ }
+}
diff --git a/memory/replace/dmd/test/script-diff-dark-matter2.json b/memory/replace/dmd/test/script-diff-dark-matter2.json
new file mode 100644
index 0000000000..2c3061223f
--- /dev/null
+++ b/memory/replace/dmd/test/script-diff-dark-matter2.json
@@ -0,0 +1,51 @@
+{
+ "version": 5,
+ "invocation": {
+ "dmdEnvVar": "1",
+ "mode": "dark-matter"
+ },
+ "blockList": [
+ { "req": 4096, "alloc": "A", "num": 4 },
+
+ { "req": 8192, "alloc": "B" },
+ { "req": 8192, "alloc": "B" },
+
+ { "req": 4000, "slop": 96, "alloc": "C", "num": 4 },
+
+ { "req": 4096, "alloc": "E", "num": 4 },
+
+ { "req": 2000, "slop": 48, "alloc": "F" },
+ { "req": 1000, "slop": 24, "alloc": "F", "reps": ["R1"] },
+ { "req": 512, "alloc": "F" },
+ { "req": 512, "alloc": "F" },
+ { "req": 512, "alloc": "F" },
+ { "req": 512, "alloc": "F" },
+ { "req": 128, "alloc": "F" },
+ { "req": 63, "alloc": "F", "reps": ["R1", "R2"] },
+ { "req": 64, "alloc": "F", "num": 4 },
+ { "req": 63, "alloc": "F" },
+
+ { "req": 4096, "num": 2 },
+ { "req": 20480 }
+ ],
+ "traceTable": {
+ "A": ["AA"],
+ "B": ["BB"],
+ "C": ["CC"],
+ "D": ["DD"],
+ "E": ["EE"],
+ "F": ["FF"],
+ "R1": ["RR1"],
+ "R2": ["RR2"]
+ },
+ "frameTable": {
+ "AA": "#00: A (A.cpp:99)",
+ "BB": "#00: B (B.cpp:99)",
+ "CC": "#00: C (C.cpp:99)",
+ "DD": "#00: D (D.cpp:99)",
+ "EE": "#00: E (E.cpp:99)",
+ "FF": "#00: F (F.cpp:99)",
+ "RR1": "#00: R1 (R1.cpp:99)",
+ "RR2": "#00: R2 (R2.cpp:99)"
+ }
+}
diff --git a/memory/replace/dmd/test/script-diff-live-expected.txt b/memory/replace/dmd/test/script-diff-live-expected.txt
new file mode 100644
index 0000000000..20208c0768
--- /dev/null
+++ b/memory/replace/dmd/test/script-diff-live-expected.txt
@@ -0,0 +1,81 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o script-diff-live-actual.txt script-diff-live1.json script-diff-live2.json
+
+Invocation 1 {
+ $DMD = '--mode=live'
+ Mode = 'live'
+}
+
+Invocation 2 {
+ $DMD = '--mode=live --stacks=partial'
+ Mode = 'live'
+}
+
+#-----------------------------------------------------------------
+
+Live {
+ 4 blocks in heap block record 1 of 6
+ 16,384 bytes (16,384 requested / 0 slop)
+ Individual block sizes: 4,096 x 4
+ -232.76% of the heap (-232.76% cumulative)
+ Allocated at {
+ #01: E (E.cpp:99)
+ }
+}
+
+Live {
+ 5 blocks in heap block record 2 of 6
+ -13,183 bytes (-13,231 requested / 48 slop)
+ Individual block sizes: -15,360; 2,048; -1,024; 512 x 2; 128; -127 x 3; 64 x 4; 63 x 2
+ 187.29% of the heap (-45.48% cumulative)
+ Allocated at {
+ #01: F (F.cpp:99)
+ }
+}
+
+Live {
+ -3 blocks in heap block record 3 of 6
+ -10,240 bytes (-10,192 requested / -48 slop)
+ Individual block sizes: -4,096 x 2; -2,048
+ 145.48% of the heap (100.00% cumulative)
+ Allocated at {
+ #01: D (D.cpp:99)
+ }
+}
+
+Live {
+ 0 blocks in heap block record 4 of 6
+ 0 bytes (-384 requested / 384 slop)
+ Individual block sizes: (no change)
+ -0.00% of the heap (100.00% cumulative)
+ Allocated at {
+ #01: C (C.cpp:99)
+ }
+}
+
+Live {
+ -2 blocks in heap block record 5 of 6
+ 0 bytes (0 requested / 0 slop)
+ Individual block sizes: 8,192 x 2; -4,096 x 4
+ -0.00% of the heap (100.00% cumulative)
+ Allocated at {
+ #01: B (B.cpp:99)
+ }
+}
+
+Live {
+ 0 blocks in heap block record 6 of 6
+ 0 bytes (0 requested / 0 slop)
+ Individual block sizes: 20,480; -16,384; -8,192; 4,096
+ -0.00% of the heap (100.00% cumulative)
+ Allocated at {
+ #01: (no stack trace recorded due to --stacks=partial)
+ }
+}
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: -7,039 bytes in 4 blocks
+}
+
diff --git a/memory/replace/dmd/test/script-diff-live1.json b/memory/replace/dmd/test/script-diff-live1.json
new file mode 100644
index 0000000000..1296b9ea09
--- /dev/null
+++ b/memory/replace/dmd/test/script-diff-live1.json
@@ -0,0 +1,51 @@
+{
+ "version": 5,
+ "invocation": {
+ "dmdEnvVar": "--mode=live",
+ "mode": "live"
+ },
+ "blockList": [
+ { "req": 4096, "alloc": "A", "num": 4 },
+
+ { "req": 4096, "alloc": "B", "num": 4 },
+
+ { "req": 4096, "alloc": "C", "num": 4 },
+
+ { "req": 4096, "alloc": "D" },
+ { "req": 4096, "alloc": "D" },
+ { "req": 2000, "slop": 48, "alloc": "D" },
+
+ { "req": 15360, "alloc": "F" },
+ { "req": 512, "alloc": "F" },
+ { "req": 512, "alloc": "F" },
+ { "req": 127, "alloc": "F" },
+ { "req": 1024, "alloc": "F" },
+ { "req": 127, "alloc": "F" },
+ { "req": 1000, "slop": 24, "alloc": "F" },
+ { "req": 127, "alloc": "F" },
+
+ { "req": 4096 },
+ { "req": 8192 },
+ { "req": 16384 }
+ ],
+ "traceTable": {
+ "A": ["AA"],
+ "B": ["BB"],
+ "C": ["CC"],
+ "D": ["DD"],
+ "E": ["EE"],
+ "F": ["FF"],
+ "R1": ["RR1"],
+ "R2": ["RR2"]
+ },
+ "frameTable": {
+ "AA": "#00: A (A.cpp:99)",
+ "BB": "#00: B (B.cpp:99)",
+ "CC": "#00: C (C.cpp:99)",
+ "DD": "#00: D (D.cpp:99)",
+ "EE": "#00: E (E.cpp:99)",
+ "FF": "#00: F (F.cpp:99)",
+ "RR1": "#00: R1 (R1.cpp:99)",
+ "RR2": "#00: R2 (R2.cpp:99)"
+ }
+}
diff --git a/memory/replace/dmd/test/script-diff-live2.json b/memory/replace/dmd/test/script-diff-live2.json
new file mode 100644
index 0000000000..723ea5ff35
--- /dev/null
+++ b/memory/replace/dmd/test/script-diff-live2.json
@@ -0,0 +1,53 @@
+{
+ "version": 5,
+ "invocation": {
+ "dmdEnvVar": "--mode=live --stacks=partial",
+ "mode": "live"
+ },
+ "blockList": [
+ { "req": 4096, "alloc": "A", "num": 3 },
+ { "req": 4096, "alloc": "A" },
+
+ { "req": 8192, "alloc": "B" },
+ { "req": 8192, "alloc": "B" },
+
+ { "req": 4000, "slop": 96, "alloc": "C", "num": 4 },
+
+ { "req": 4096, "alloc": "E" },
+ { "req": 4096, "alloc": "E" },
+ { "req": 4096, "alloc": "E" },
+ { "req": 4096, "alloc": "E" },
+
+ { "req": 2000, "slop": 48, "alloc": "F" },
+ { "req": 1000, "slop": 24, "alloc": "F" },
+ { "req": 512, "alloc": "F", "num": 4 },
+ { "req": 128, "alloc": "F" },
+ { "req": 63, "alloc": "F" },
+ { "req": 64, "alloc": "F", "num": 4 },
+ { "req": 63, "alloc": "F" },
+
+ { "req": 4096 },
+ { "req": 4096 },
+ { "req": 20480 }
+ ],
+ "traceTable": {
+ "A": ["AA"],
+ "B": ["BB"],
+ "C": ["CC"],
+ "D": ["DD"],
+ "E": ["EE"],
+ "F": ["FF"],
+ "R1": ["RR1"],
+ "R2": ["RR2"]
+ },
+ "frameTable": {
+ "AA": "#00: A (A.cpp:99)",
+ "BB": "#00: B (B.cpp:99)",
+ "CC": "#00: C (C.cpp:99)",
+ "DD": "#00: D (D.cpp:99)",
+ "EE": "#00: E (E.cpp:99)",
+ "FF": "#00: F (F.cpp:99)",
+ "RR1": "#00: R1 (R1.cpp:99)",
+ "RR2": "#00: R2 (R2.cpp:99)"
+ }
+}
diff --git a/memory/replace/dmd/test/script-ignore-alloc-fns-expected.txt b/memory/replace/dmd/test/script-ignore-alloc-fns-expected.txt
new file mode 100644
index 0000000000..9428ef45fb
--- /dev/null
+++ b/memory/replace/dmd/test/script-ignore-alloc-fns-expected.txt
@@ -0,0 +1,72 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o script-ignore-alloc-fns-actual.txt --ignore-alloc-fns script-ignore-alloc-fns.json
+
+Invocation {
+ $DMD = '1'
+ Mode = 'dark-matter'
+}
+
+#-----------------------------------------------------------------
+
+# no twice-reported heap blocks
+
+#-----------------------------------------------------------------
+
+Unreported {
+ 1 block in heap block record 1 of 4
+ 1,048,576 bytes (1,048,576 requested / 0 slop)
+ 93.22% of the heap (93.22% cumulative)
+ 93.22% of unreported (93.22% cumulative)
+ Allocated at {
+ #01: A (A.cpp:99)
+ }
+}
+
+Unreported {
+ 1 block in heap block record 2 of 4
+ 65,536 bytes (65,536 requested / 0 slop)
+ 5.83% of the heap (99.05% cumulative)
+ 5.83% of unreported (99.05% cumulative)
+ Allocated at {
+ #01: js::jit::JitRuntime::initialize(JSContext*) (Ion.cpp:301)
+ }
+}
+
+Unreported {
+ 1 block in heap block record 3 of 4
+ 8,192 bytes (8,000 requested / 192 slop)
+ 0.73% of the heap (99.78% cumulative)
+ 0.73% of unreported (99.78% cumulative)
+ Allocated at {
+ #01: mozilla::Vector::growStorageBy(unsigned long) (Vector.h:802)
+ #02: D (D.cpp:99)
+ }
+}
+
+Unreported {
+ 1 block in heap block record 4 of 4
+ 2,500 bytes (2,500 requested / 0 slop)
+ 0.22% of the heap (100.00% cumulative)
+ 0.22% of unreported (100.00% cumulative)
+ Allocated at {
+ #01: g_type_create_instance (/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0)
+ #02: not_an_alloc_function_so_alloc_functions_below_here_will_not_be_stripped (blah)
+ #03: replace_posix_memalign (replace_malloc.h:120)
+ #04: ??? (/lib/x86_64-linux-gnu/libglib-2.0.so.0)
+ #05: another_non_alloc_function (blah)
+ }
+}
+
+#-----------------------------------------------------------------
+
+# no once-reported heap blocks
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: 1,124,804 bytes (100.00%) in 4 blocks (100.00%)
+ Unreported: 1,124,804 bytes (100.00%) in 4 blocks (100.00%)
+ Once-reported: 0 bytes ( 0.00%) in 0 blocks ( 0.00%)
+ Twice-reported: 0 bytes ( 0.00%) in 0 blocks ( 0.00%)
+}
+
diff --git a/memory/replace/dmd/test/script-ignore-alloc-fns.json b/memory/replace/dmd/test/script-ignore-alloc-fns.json
new file mode 100644
index 0000000000..a6c7c8419a
--- /dev/null
+++ b/memory/replace/dmd/test/script-ignore-alloc-fns.json
@@ -0,0 +1,45 @@
+{
+ "version": 5,
+ "invocation": {
+ "dmdEnvVar": "1",
+ "mode": "dark-matter"
+ },
+ "blockList": [
+ { "req": 1048576, "alloc": "A" },
+ { "req": 65536, "alloc": "B" },
+ { "req": 8000, "slop": 192, "alloc": "C" },
+ { "req": 2500, "alloc": "D" }
+ ],
+ "traceTable": {
+ "A": ["AA", "AB", "AC", "AD"],
+ "B": ["BA", "BB", "BC"],
+ "C": ["CA", "CB", "CC", "CD"],
+ "D": ["DA", "DB", "DD", "DD", "DE", "DF", "DG", "DH", "DI", "DJ"]
+ },
+ "frameTable": {
+ "AA": "#00: replace_malloc (DMD.cpp:1106)",
+ "AB": "#00: moz_xmalloc (mozalloc.cpp:68)",
+ "AC": "#00: operator new(unsigned long) (mozalloc.h:208)",
+ "AD": "#00: A (A.cpp:99)",
+
+ "BA": "#00: replace_calloc (DMD.cpp:1125)",
+ "BB": "#00: js_calloc(unsigned long) (Utility.h:107)",
+ "BC": "#06: js::jit::JitRuntime::initialize(JSContext*) (Ion.cpp:301)",
+
+ "CA": "#00: replace_realloc (DMD.cpp:1153)",
+ "CB": "#00: bool* mozilla::MallocAllocPolicy::pod_realloc<bool>(bool*, unsigned long, unsigned long) (AllocPolicy.h:74)",
+ "CC": "#00: mozilla::Vector::growStorageBy(unsigned long) (Vector.h:802)",
+ "CD": "#00: D (D.cpp:99)",
+
+ "DA": "#00: replace_memalign (DMD.cpp:1181)",
+ "DB": "#00: replace_posix_memalign (replace_malloc.h:120)",
+ "DC": "#00: ??? (/lib/x86_64-linux-gnu/libglib-2.0.so.0)",
+ "DD": "#00: g_slice_alloc (/lib/x86_64-linux-gnu/libglib-2.0.so.0)",
+ "DE": "#00: g_slice_alloc0 (/lib/x86_64-linux-gnu/libglib-2.0.so.0)",
+ "DF": "#00: g_type_create_instance (/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0)",
+ "DG": "#00: not_an_alloc_function_so_alloc_functions_below_here_will_not_be_stripped (blah)",
+ "DH": "#00: replace_posix_memalign (replace_malloc.h:120)",
+ "DI": "#00: ??? (/lib/x86_64-linux-gnu/libglib-2.0.so.0)",
+ "DJ": "#00: another_non_alloc_function (blah)"
+ }
+}
diff --git a/memory/replace/dmd/test/script-max-frames-1-expected.txt b/memory/replace/dmd/test/script-max-frames-1-expected.txt
new file mode 100644
index 0000000000..65a00762bb
--- /dev/null
+++ b/memory/replace/dmd/test/script-max-frames-1-expected.txt
@@ -0,0 +1,26 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o script-max-frames-1-actual.txt --max-frames=1 script-max-frames.json
+
+Invocation {
+ $DMD = '--mode=live --stacks=full'
+ Mode = 'live'
+}
+
+#-----------------------------------------------------------------
+
+Live {
+ 4 blocks in heap block record 1 of 1
+ 4,416 bytes (4,404 requested / 12 slop)
+ Individual block sizes: 4,096; 128; 112; 80
+ 100.00% of the heap (100.00% cumulative)
+ Allocated at {
+ #01: E (E.cpp:99)
+ }
+}
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: 4,416 bytes in 4 blocks
+}
+
diff --git a/memory/replace/dmd/test/script-max-frames-3-expected.txt b/memory/replace/dmd/test/script-max-frames-3-expected.txt
new file mode 100644
index 0000000000..5df4914738
--- /dev/null
+++ b/memory/replace/dmd/test/script-max-frames-3-expected.txt
@@ -0,0 +1,48 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o script-max-frames-3-actual.txt --max-frames=3 --no-fix-stacks script-max-frames.json
+
+Invocation {
+ $DMD = '--mode=live --stacks=full'
+ Mode = 'live'
+}
+
+#-----------------------------------------------------------------
+
+Live {
+ 2 blocks in heap block record 1 of 3
+ 4,224 bytes (4,224 requested / 0 slop)
+ Individual block sizes: 4,096; 128
+ 95.65% of the heap (95.65% cumulative)
+ Allocated at {
+ #01: E (E.cpp:99)
+ #02: F (F.cpp:99)
+ #03: G (G.cpp:99)
+ }
+}
+
+Live {
+ 1 block in heap block record 2 of 3
+ 112 bytes (100 requested / 12 slop)
+ 2.54% of the heap (98.19% cumulative)
+ Allocated at {
+ #01: E (E.cpp:99)
+ #02: X (X.cpp:99)
+ #03: Y (Y.cpp:99)
+ }
+}
+
+Live {
+ 1 block in heap block record 3 of 3
+ 80 bytes (80 requested / 0 slop)
+ 1.81% of the heap (100.00% cumulative)
+ Allocated at {
+ #01: E (E.cpp:99)
+ }
+}
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: 4,416 bytes in 4 blocks
+}
+
diff --git a/memory/replace/dmd/test/script-max-frames-8-expected.txt b/memory/replace/dmd/test/script-max-frames-8-expected.txt
new file mode 100644
index 0000000000..174992d5b8
--- /dev/null
+++ b/memory/replace/dmd/test/script-max-frames-8-expected.txt
@@ -0,0 +1,69 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o script-max-frames-8-actual.txt script-max-frames.json
+
+Invocation {
+ $DMD = '--mode=live --stacks=full'
+ Mode = 'live'
+}
+
+#-----------------------------------------------------------------
+
+Live {
+ 1 block in heap block record 1 of 4
+ 4,096 bytes (4,096 requested / 0 slop)
+ 92.75% of the heap (92.75% cumulative)
+ Allocated at {
+ #01: E (E.cpp:99)
+ #02: F (F.cpp:99)
+ #03: G (G.cpp:99)
+ #04: H (H.cpp:99)
+ #05: I (I.cpp:99)
+ #06: J (J.cpp:99)
+ #07: K (K.cpp:99)
+ #08: L (L.cpp:99)
+ }
+}
+
+Live {
+ 1 block in heap block record 2 of 4
+ 128 bytes (128 requested / 0 slop)
+ 2.90% of the heap (95.65% cumulative)
+ Allocated at {
+ #01: E (E.cpp:99)
+ #02: F (F.cpp:99)
+ #03: G (G.cpp:99)
+ #04: R (R.cpp:99)
+ #05: S (S.cpp:99)
+ #06: T (T.cpp:99)
+ #07: U (U.cpp:99)
+ #08: V (V.cpp:99)
+ }
+}
+
+Live {
+ 1 block in heap block record 3 of 4
+ 112 bytes (100 requested / 12 slop)
+ 2.54% of the heap (98.19% cumulative)
+ Allocated at {
+ #01: E (E.cpp:99)
+ #02: X (X.cpp:99)
+ #03: Y (Y.cpp:99)
+ #04: Z (Z.cpp:99)
+ }
+}
+
+Live {
+ 1 block in heap block record 4 of 4
+ 80 bytes (80 requested / 0 slop)
+ 1.81% of the heap (100.00% cumulative)
+ Allocated at {
+ #01: E (E.cpp:99)
+ }
+}
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: 4,416 bytes in 4 blocks
+}
+
diff --git a/memory/replace/dmd/test/script-max-frames.json b/memory/replace/dmd/test/script-max-frames.json
new file mode 100644
index 0000000000..6de17a88c3
--- /dev/null
+++ b/memory/replace/dmd/test/script-max-frames.json
@@ -0,0 +1,43 @@
+{
+ "version": 5,
+ "invocation": {
+ "dmdEnvVar": "--mode=live --stacks=full",
+ "mode": "live"
+ },
+ "blockList": [
+ { "req": 4096, "alloc": "A" },
+ { "req": 128, "alloc": "B" },
+ { "req": 100, "slop": 12, "alloc": "C" },
+ { "req": 80, "alloc": "D" }
+ ],
+ "traceTable": {
+ "A": ["E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P"],
+ "B": ["E", "F", "G", "R", "S", "T", "U", "V"],
+ "C": ["E", "X", "Y", "Z"],
+ "D": ["E"]
+ },
+ "frameTable": {
+ "E": "#00: E (E.cpp:99)",
+ "F": "#00: F (F.cpp:99)",
+ "G": "#00: G (G.cpp:99)",
+ "H": "#00: H (H.cpp:99)",
+ "I": "#00: I (I.cpp:99)",
+ "J": "#00: J (J.cpp:99)",
+ "K": "#00: K (K.cpp:99)",
+ "L": "#00: L (L.cpp:99)",
+ "M": "#00: M (M.cpp:99)",
+ "N": "#00: N (N.cpp:99)",
+ "O": "#00: O (O.cpp:99)",
+ "P": "#00: P (P.cpp:99)",
+ "Q": "#00: Q (Q.cpp:99)",
+ "R": "#00: R (R.cpp:99)",
+ "S": "#00: S (S.cpp:99)",
+ "T": "#00: T (T.cpp:99)",
+ "U": "#00: U (U.cpp:99)",
+ "V": "#00: V (V.cpp:99)",
+ "W": "#00: W (W.cpp:99)",
+ "X": "#00: X (X.cpp:99)",
+ "Y": "#00: Y (Y.cpp:99)",
+ "Z": "#00: Z (Z.cpp:99)"
+ }
+}
diff --git a/memory/replace/dmd/test/script-sort-by-num-blocks-expected.txt b/memory/replace/dmd/test/script-sort-by-num-blocks-expected.txt
new file mode 100644
index 0000000000..8de03d953b
--- /dev/null
+++ b/memory/replace/dmd/test/script-sort-by-num-blocks-expected.txt
@@ -0,0 +1,46 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o script-sort-by-num-blocks-actual.txt --sort-by=num-blocks script-sort-by.json.gz
+
+Invocation {
+ $DMD = '--mode=live'
+ Mode = 'live'
+}
+
+#-----------------------------------------------------------------
+
+Live {
+ 8 blocks in heap block record 1 of 3
+ 16,384 bytes (8,200 requested / 8,184 slop)
+ Individual block sizes: 2,048 x 8
+ 33.32% of the heap (33.32% cumulative)
+ Allocated at {
+ #01: C (C.cpp:99)
+ }
+}
+
+Live {
+ 5 blocks in heap block record 2 of 3
+ 16,400 bytes (12,016 requested / 4,384 slop)
+ Individual block sizes: 4,096 x 4; 16
+ 33.35% of the heap (66.67% cumulative)
+ Allocated at {
+ #01: B (B.cpp:99)
+ }
+}
+
+Live {
+ 5 blocks in heap block record 3 of 3
+ 16,392 bytes (16,392 requested / 0 slop)
+ Individual block sizes: 4,096 x 4; 8
+ 33.33% of the heap (100.00% cumulative)
+ Allocated at {
+ #01: A (A.cpp:99)
+ }
+}
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: 49,176 bytes in 18 blocks
+}
+
diff --git a/memory/replace/dmd/test/script-sort-by-req-expected.txt b/memory/replace/dmd/test/script-sort-by-req-expected.txt
new file mode 100644
index 0000000000..3ab21ba8f7
--- /dev/null
+++ b/memory/replace/dmd/test/script-sort-by-req-expected.txt
@@ -0,0 +1,46 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o script-sort-by-req-actual.txt --sort-by=req --no-fix-stacks script-sort-by.json.gz
+
+Invocation {
+ $DMD = '--mode=live'
+ Mode = 'live'
+}
+
+#-----------------------------------------------------------------
+
+Live {
+ 5 blocks in heap block record 1 of 3
+ 16,392 bytes (16,392 requested / 0 slop)
+ Individual block sizes: 4,096 x 4; 8
+ 33.33% of the heap (33.33% cumulative)
+ Allocated at {
+ #01: A (A.cpp:99)
+ }
+}
+
+Live {
+ 5 blocks in heap block record 2 of 3
+ 16,400 bytes (12,016 requested / 4,384 slop)
+ Individual block sizes: 4,096 x 4; 16
+ 33.35% of the heap (66.68% cumulative)
+ Allocated at {
+ #01: B (B.cpp:99)
+ }
+}
+
+Live {
+ 8 blocks in heap block record 3 of 3
+ 16,384 bytes (8,200 requested / 8,184 slop)
+ Individual block sizes: 2,048 x 8
+ 33.32% of the heap (100.00% cumulative)
+ Allocated at {
+ #01: C (C.cpp:99)
+ }
+}
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: 49,176 bytes in 18 blocks
+}
+
diff --git a/memory/replace/dmd/test/script-sort-by-slop-expected.txt b/memory/replace/dmd/test/script-sort-by-slop-expected.txt
new file mode 100644
index 0000000000..c325c7ed40
--- /dev/null
+++ b/memory/replace/dmd/test/script-sort-by-slop-expected.txt
@@ -0,0 +1,46 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o script-sort-by-slop-actual.txt --sort-by=slop script-sort-by.json.gz
+
+Invocation {
+ $DMD = '--mode=live'
+ Mode = 'live'
+}
+
+#-----------------------------------------------------------------
+
+Live {
+ 8 blocks in heap block record 1 of 3
+ 16,384 bytes (8,200 requested / 8,184 slop)
+ Individual block sizes: 2,048 x 8
+ 33.32% of the heap (33.32% cumulative)
+ Allocated at {
+ #01: C (C.cpp:99)
+ }
+}
+
+Live {
+ 5 blocks in heap block record 2 of 3
+ 16,400 bytes (12,016 requested / 4,384 slop)
+ Individual block sizes: 4,096 x 4; 16
+ 33.35% of the heap (66.67% cumulative)
+ Allocated at {
+ #01: B (B.cpp:99)
+ }
+}
+
+Live {
+ 5 blocks in heap block record 3 of 3
+ 16,392 bytes (16,392 requested / 0 slop)
+ Individual block sizes: 4,096 x 4; 8
+ 33.33% of the heap (100.00% cumulative)
+ Allocated at {
+ #01: A (A.cpp:99)
+ }
+}
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: 49,176 bytes in 18 blocks
+}
+
diff --git a/memory/replace/dmd/test/script-sort-by-usable-expected.txt b/memory/replace/dmd/test/script-sort-by-usable-expected.txt
new file mode 100644
index 0000000000..8239a4759e
--- /dev/null
+++ b/memory/replace/dmd/test/script-sort-by-usable-expected.txt
@@ -0,0 +1,46 @@
+#-----------------------------------------------------------------
+# dmd.py --filter-stacks-for-testing -o script-sort-by-usable-actual.txt --sort-by=usable script-sort-by.json.gz
+
+Invocation {
+ $DMD = '--mode=live'
+ Mode = 'live'
+}
+
+#-----------------------------------------------------------------
+
+Live {
+ 5 blocks in heap block record 1 of 3
+ 16,400 bytes (12,016 requested / 4,384 slop)
+ Individual block sizes: 4,096 x 4; 16
+ 33.35% of the heap (33.35% cumulative)
+ Allocated at {
+ #01: B (B.cpp:99)
+ }
+}
+
+Live {
+ 5 blocks in heap block record 2 of 3
+ 16,392 bytes (16,392 requested / 0 slop)
+ Individual block sizes: 4,096 x 4; 8
+ 33.33% of the heap (66.68% cumulative)
+ Allocated at {
+ #01: A (A.cpp:99)
+ }
+}
+
+Live {
+ 8 blocks in heap block record 3 of 3
+ 16,384 bytes (8,200 requested / 8,184 slop)
+ Individual block sizes: 2,048 x 8
+ 33.32% of the heap (100.00% cumulative)
+ Allocated at {
+ #01: C (C.cpp:99)
+ }
+}
+
+#-----------------------------------------------------------------
+
+Summary {
+ Total: 49,176 bytes in 18 blocks
+}
+
diff --git a/memory/replace/dmd/test/script-sort-by.json.gz b/memory/replace/dmd/test/script-sort-by.json.gz
new file mode 100644
index 0000000000..f665c945c2
--- /dev/null
+++ b/memory/replace/dmd/test/script-sort-by.json.gz
Binary files differ
diff --git a/memory/replace/dmd/test/test_dmd.js b/memory/replace/dmd/test/test_dmd.js
new file mode 100644
index 0000000000..e092c79a02
--- /dev/null
+++ b/memory/replace/dmd/test/test_dmd.js
@@ -0,0 +1,232 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 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/. */
+
+"use strict";
+
+const { FileUtils } = ChromeUtils.importESModule(
+ "resource://gre/modules/FileUtils.sys.mjs"
+);
+
+// The xpcshell test harness sets PYTHON so we can read it here.
+var gPythonName = Services.env.get("PYTHON");
+
+const gCwd = Services.dirsvc.get("CurWorkD", Ci.nsIFile);
+
+function getRelativeFile(...components) {
+ return new FileUtils.File(PathUtils.join(gCwd.path, ...components));
+}
+
+// If we're testing locally, the executable file is in "CurProcD". Otherwise,
+// it is in another location that we have to find.
+function getExecutable(aFilename) {
+ let file = new FileUtils.File(
+ PathUtils.join(Services.dirsvc.get("CurProcD", Ci.nsIFile).path, aFilename)
+ );
+ if (!file.exists()) {
+ file = gCwd.clone();
+ while (file.path.includes("xpcshell")) {
+ file = file.parent;
+ }
+ file.append("bin");
+ file.append(aFilename);
+ }
+ return file;
+}
+
+var gIsWindows = Services.appinfo.OS === "WINNT";
+var gDmdTestFile = getExecutable("SmokeDMD" + (gIsWindows ? ".exe" : ""));
+
+var gDmdScriptFile = getExecutable("dmd.py");
+
+var gScanTestFile = getRelativeFile("scan-test.py");
+
+function readFile(aFile) {
+ let fstream = Cc["@mozilla.org/network/file-input-stream;1"].createInstance(
+ Ci.nsIFileInputStream
+ );
+ let cstream = Cc["@mozilla.org/intl/converter-input-stream;1"].createInstance(
+ Ci.nsIConverterInputStream
+ );
+ fstream.init(aFile, -1, 0, 0);
+ cstream.init(fstream, "UTF-8", 0, 0);
+
+ let data = "";
+ let str = {};
+ let read = 0;
+ do {
+ // Read as much as we can and put it in str.value.
+ read = cstream.readString(0xffffffff, str);
+ data += str.value;
+ } while (read != 0);
+
+ cstream.close(); // this closes fstream
+ return data.replace(/\r/g, ""); // normalize line endings
+}
+
+function runProcess(aExeFile, aArgs) {
+ let process = Cc["@mozilla.org/process/util;1"].createInstance(Ci.nsIProcess);
+ process.init(aExeFile);
+ process.run(/* blocking = */ true, aArgs, aArgs.length);
+ return process.exitValue;
+}
+
+function test(aPrefix, aArgs) {
+ // DMD writes the JSON files to CurWorkD, so we do likewise here with
+ // |actualFile| for consistency. It is removed once we've finished.
+ let expectedFile = getRelativeFile(`${aPrefix}-expected.txt`);
+ let actualFile = getRelativeFile(`${aPrefix}-actual.txt`);
+
+ // Run dmd.py on the JSON file, producing |actualFile|.
+
+ let args = [
+ gDmdScriptFile.path,
+ "--filter-stacks-for-testing",
+ "-o",
+ actualFile.path,
+ ].concat(aArgs);
+
+ runProcess(new FileUtils.File(gPythonName), args);
+
+ // Compare |expectedFile| with |actualFile|. We produce nice diffs with
+ // /usr/bin/diff on systems that have it (Mac and Linux). Otherwise (Windows)
+ // we do a string compare of the file contents and then print them both if
+ // they don't match.
+
+ let success;
+ try {
+ let rv = runProcess(new FileUtils.File("/usr/bin/diff"), [
+ "-u",
+ expectedFile.path,
+ actualFile.path,
+ ]);
+ success = rv == 0;
+ } catch (e) {
+ let expectedData = readFile(expectedFile);
+ let actualData = readFile(actualFile);
+ success = expectedData === actualData;
+ if (!success) {
+ expectedData = expectedData.split("\n");
+ actualData = actualData.split("\n");
+ for (let i = 0; i < expectedData.length; i++) {
+ print("EXPECTED:" + expectedData[i]);
+ }
+ for (let i = 0; i < actualData.length; i++) {
+ print(" ACTUAL:" + actualData[i]);
+ }
+ }
+ }
+
+ ok(success, aPrefix);
+
+ actualFile.remove(true);
+}
+
+// Run scan-test.py on the JSON file and see if it succeeds.
+function scanTest(aJsonFilePath, aExtraArgs) {
+ let args = [gScanTestFile.path, aJsonFilePath].concat(aExtraArgs);
+
+ return runProcess(new FileUtils.File(gPythonName), args) == 0;
+}
+
+function run_test() {
+ let jsonFile, jsonFile2;
+
+ // These tests do complete end-to-end testing of DMD, i.e. both the C++ code
+ // that generates the JSON output, and the script that post-processes that
+ // output.
+ //
+ // Run these synchronously, because test() updates the complete*.json files
+ // in-place (to fix stacks) when it runs dmd.py, and that's not safe to do
+ // asynchronously.
+
+ Services.env.set("DMD", "1");
+
+ runProcess(gDmdTestFile, []);
+
+ function test2(aTestName, aMode) {
+ let name = "complete-" + aTestName + "-" + aMode;
+ jsonFile = getRelativeFile(`${name}.json`);
+ test(name, [jsonFile.path]);
+ jsonFile.remove(true);
+ }
+
+ // Please keep this in sync with RunTests() in SmokeDMD.cpp.
+
+ test2("empty", "live");
+ test2("empty", "dark-matter");
+ test2("empty", "cumulative");
+
+ test2("full1", "live");
+ test2("full1", "dark-matter");
+
+ test2("full2", "dark-matter");
+ test2("full2", "cumulative");
+
+ test2("partial", "live");
+
+ // Heap scan testing.
+ jsonFile = getRelativeFile("basic-scan.json");
+ ok(scanTest(jsonFile.path), "Basic scan test");
+
+ let is64Bit = Services.appinfo.is64Bit;
+ let basicScanFileName = "basic-scan-" + (is64Bit ? "64" : "32");
+ test(basicScanFileName, ["--clamp-contents", jsonFile.path]);
+ ok(
+ scanTest(jsonFile.path, ["--clamp-contents"]),
+ "Scan with address clamping"
+ );
+
+ // Run the generic test a second time to ensure that the first time produced
+ // valid JSON output. "--clamp-contents" is passed in so we don't have to have
+ // more variants of the files.
+ test(basicScanFileName, ["--clamp-contents", jsonFile.path]);
+ jsonFile.remove(true);
+
+ // These tests only test the post-processing script. They use hand-written
+ // JSON files as input. Ideally the JSON files would contain comments
+ // explaining how they work, but JSON doesn't allow comments, so I've put
+ // explanations here.
+
+ // This just tests that stack traces of various lengths are truncated
+ // appropriately. The number of records in the output is different for each
+ // of the tested values.
+ jsonFile = getRelativeFile("script-max-frames.json");
+ test("script-max-frames-8", [jsonFile.path]); // --max-frames=8 is the default
+ test("script-max-frames-3", [
+ "--max-frames=3",
+ "--no-fix-stacks",
+ jsonFile.path,
+ ]);
+ test("script-max-frames-1", ["--max-frames=1", jsonFile.path]);
+
+ // This file has three records that are shown in a different order for each
+ // of the different sort values. It also tests the handling of gzipped JSON
+ // files.
+ jsonFile = getRelativeFile("script-sort-by.json.gz");
+ test("script-sort-by-usable", ["--sort-by=usable", jsonFile.path]);
+ test("script-sort-by-req", [
+ "--sort-by=req",
+ "--no-fix-stacks",
+ jsonFile.path,
+ ]);
+ test("script-sort-by-slop", ["--sort-by=slop", jsonFile.path]);
+ test("script-sort-by-num-blocks", ["--sort-by=num-blocks", jsonFile.path]);
+
+ // This file has several real stack traces taken from Firefox execution, each
+ // of which tests a different allocator function (or functions).
+ jsonFile = getRelativeFile("script-ignore-alloc-fns.json");
+ test("script-ignore-alloc-fns", ["--ignore-alloc-fns", jsonFile.path]);
+
+ // This tests "live"-mode diffs.
+ jsonFile = getRelativeFile("script-diff-live1.json");
+ jsonFile2 = getRelativeFile("script-diff-live2.json");
+ test("script-diff-live", [jsonFile.path, jsonFile2.path]);
+
+ // This tests "dark-matter"-mode diffs.
+ jsonFile = getRelativeFile("script-diff-dark-matter1.json");
+ jsonFile2 = getRelativeFile("script-diff-dark-matter2.json");
+ test("script-diff-dark-matter", [jsonFile.path, jsonFile2.path]);
+}
diff --git a/memory/replace/dmd/test/xpcshell.toml b/memory/replace/dmd/test/xpcshell.toml
new file mode 100644
index 0000000000..ef05a8ec26
--- /dev/null
+++ b/memory/replace/dmd/test/xpcshell.toml
@@ -0,0 +1,35 @@
+[DEFAULT]
+support-files = [
+ "basic-scan-32-expected.txt",
+ "basic-scan-64-expected.txt",
+ "complete-empty-live-expected.txt",
+ "complete-empty-dark-matter-expected.txt",
+ "complete-empty-cumulative-expected.txt",
+ "complete-full1-live-expected.txt",
+ "complete-full1-dark-matter-expected.txt",
+ "complete-full2-dark-matter-expected.txt",
+ "complete-full2-cumulative-expected.txt",
+ "complete-partial-live-expected.txt",
+ "scan-test.py",
+ "script-max-frames.json",
+ "script-max-frames-8-expected.txt",
+ "script-max-frames-3-expected.txt",
+ "script-max-frames-1-expected.txt",
+ "script-sort-by.json.gz",
+ "script-sort-by-usable-expected.txt",
+ "script-sort-by-req-expected.txt",
+ "script-sort-by-slop-expected.txt",
+ "script-sort-by-num-blocks-expected.txt",
+ "script-ignore-alloc-fns.json",
+ "script-ignore-alloc-fns-expected.txt",
+ "script-diff-live1.json",
+ "script-diff-live2.json",
+ "script-diff-live-expected.txt",
+ "script-diff-dark-matter1.json",
+ "script-diff-dark-matter2.json",
+ "script-diff-dark-matter-expected.txt",
+]
+
+["test_dmd.js"]
+dmd = true
+skip-if = ["!(os=='linux' || os=='mac' || (os=='win' && !pgo))"]