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Bug 824395 - Report used stacks separately from unused stacks. r=njn

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This commit is contained in:
Justin Lebar 2012-12-23 21:48:03 -05:00
parent 5c8280e854
commit 6007d234f5
3 changed files with 60 additions and 13 deletions
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56
memory/replace/dmd/DMD.cpp
View File

@ -1859,20 +1859,43 @@ PrintSortedTraceAndFrameRecords(const Writer& aWriter,
// |nsMallocSizeOfFun| 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!
MOZ_EXPORT void
SizeOf(Sizes* aSizes)
//
// 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)
{
if (!gIsDMDRunning) {
MOZ_ASSERT(gStateLock->IsLocked());
MOZ_ASSERT(Thread::Fetch()->InterceptsAreBlocked());
aSizes->Clear();
if (!gIsDMDRunning) {
return;
}
aSizes->mStackTraces = 0;
js::HashSet<const StackTrace*, js::DefaultHasher<const StackTrace*>,
InfallibleAllocPolicy> usedStackTraces;
usedStackTraces.init(1024);
for(BlockTable::Range r = gBlockTable->all(); !r.empty(); r.popFront()) {
const Block& b = r.front();
usedStackTraces.put(b.AllocStackTrace());
usedStackTraces.put(b.ReportStackTrace1());
usedStackTraces.put(b.ReportStackTrace2());
}
for (StackTraceTable::Range r = gStackTraceTable->all();
!r.empty();
r.popFront()) {
StackTrace* const& st = r.front();
aSizes->mStackTraces += MallocSizeOf(st);
if (usedStackTraces.has(st)) {
aSizes->mStackTracesUsed += MallocSizeOf(st);
} else {
aSizes->mStackTracesUnused += MallocSizeOf(st);
}
}
aSizes->mStackTraceTable =
@ -1881,6 +1904,20 @@ SizeOf(Sizes* aSizes)
aSizes->mBlockTable = gBlockTable->sizeOfIncludingThis(MallocSizeOf);
}
MOZ_EXPORT void
SizeOf(Sizes* aSizes)
{
aSizes->Clear();
if (!gIsDMDRunning) {
return;
}
AutoBlockIntercepts block(Thread::Fetch());
AutoLockState lock;
SizeOfInternal(aSizes);
}
static void
ClearGlobalState()
{
@ -2013,14 +2050,17 @@ Dump(Writer aWriter)
// Stats are non-deterministic, so don't show them in test mode.
if (gMode != Test) {
Sizes sizes;
SizeOf(&sizes);
SizeOfInternal(&sizes);
WriteTitle("Execution measurements\n");
W("Data structures that persist after Dump() ends:\n");
W(" Stack traces: %10s bytes\n",
Show(sizes.mStackTraces, gBuf1, kBufLen));
W(" Used stack traces: %10s bytes\n",
Show(sizes.mStackTracesUsed, gBuf1, kBufLen));
W(" Unused stack traces: %10s bytes\n",
Show(sizes.mStackTracesUnused, gBuf1, kBufLen));
W(" Stack trace table: %10s bytes (%s entries, %s used)\n",
Show(sizes.mStackTraceTable, gBuf1, kBufLen),

3
memory/replace/dmd/DMD.h
View File

@ -52,7 +52,8 @@ FpWrite(void* aFp, const char* aFmt, va_list aAp);
struct Sizes
{
size_t mStackTraces;
size_t mStackTracesUsed;
size_t mStackTracesUnused;
size_t mStackTraceTable;
size_t mBlockTable;

14
xpcom/base/nsMemoryReporterManager.cpp
View File

@ -596,11 +596,17 @@ public:
NS_ENSURE_SUCCESS(rv, rv); \
} while (0)
REPORT("explicit/dmd/stack-traces",
sizes.mStackTraces,
"Memory used by DMD's stack traces.");
REPORT("explicit/dmd/stack-traces/used",
sizes.mStackTracesUsed,
"Memory used by stack traces which correspond to at least "
"one heap block DMD is tracking.");
REPORT("explicit/dmd/stack-trace-table",
REPORT("explicit/dmd/stack-traces/unused",
sizes.mStackTracesUnused,
"Memory used by stack traces which don't correspond to any heap "
"blocks DMD is currently tracking.");
REPORT("explicit/dmd/stack-traces/table",
sizes.mStackTraceTable,
"Memory used by DMD's stack trace table.");