mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-10 11:54:40 +00:00
169 lines
4.2 KiB
C++
169 lines
4.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "GCHeapProfilerImpl.h"
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#include "UncensoredAllocator.h"
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namespace mozilla {
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GCHeapProfilerImpl::GCHeapProfilerImpl()
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{
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mLock = PR_NewLock();
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mMarking = false;
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}
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GCHeapProfilerImpl::~GCHeapProfilerImpl()
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{
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if (mLock) {
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PR_DestroyLock(mLock);
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}
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}
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nsTArray<nsCString>
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GCHeapProfilerImpl::GetNames() const
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{
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return mTraceTable.GetNames();
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}
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nsTArray<TrieNode>
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GCHeapProfilerImpl::GetTraces() const
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{
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return mTraceTable.GetTraces();
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}
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const nsTArray<AllocEvent>&
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GCHeapProfilerImpl::GetEvents() const
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{
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return mAllocEvents;
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}
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void
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GCHeapProfilerImpl::reset()
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{
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mTraceTable.Reset();
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mAllocEvents.Clear();
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mNurseryEntries.Clear();
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mTenuredEntriesFG.Clear();
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mTenuredEntriesBG.Clear();
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}
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void
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GCHeapProfilerImpl::sampleTenured(void* addr, uint32_t size)
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{
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SampleInternal(addr, size, mTenuredEntriesFG);
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}
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void
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GCHeapProfilerImpl::sampleNursery(void* addr, uint32_t size)
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{
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SampleInternal(addr, size, mNurseryEntries);
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}
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void
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GCHeapProfilerImpl::markTenuredStart()
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{
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AutoUseUncensoredAllocator ua;
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AutoMPLock lock(mLock);
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if (!mMarking) {
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mMarking = true;
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mTenuredEntriesFG.SwapElements(mTenuredEntriesBG);
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MOZ_ASSERT(mTenuredEntriesFG.Count() == 0);
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}
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}
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void
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GCHeapProfilerImpl::markTenured(void* addr)
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{
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AutoUseUncensoredAllocator ua;
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AutoMPLock lock(mLock);
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if (mMarking) {
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AllocEntry entry;
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if (mTenuredEntriesBG.Get(addr, &entry)) {
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entry.mMarked = true;
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mTenuredEntriesBG.Put(addr, entry);
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}
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}
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}
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void
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GCHeapProfilerImpl::sweepTenured()
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{
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AutoUseUncensoredAllocator ua;
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AutoMPLock lock(mLock);
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if (mMarking) {
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mMarking = false;
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for (auto iter = mTenuredEntriesBG.Iter(); !iter.Done(); iter.Next()) {
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if (iter.Data().mMarked) {
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iter.Data().mMarked = false;
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mTenuredEntriesFG.Put(iter.Key(), iter.Data());
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} else {
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AllocEvent& oldEvent = mAllocEvents[iter.Data().mEventIdx];
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AllocEvent newEvent(oldEvent.mTraceIdx, -oldEvent.mSize, TimeStamp::Now());
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mAllocEvents.AppendElement(newEvent);
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}
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}
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mTenuredEntriesBG.Clear();
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}
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}
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void
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GCHeapProfilerImpl::sweepNursery()
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{
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AutoUseUncensoredAllocator ua;
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AutoMPLock lock(mLock);
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for (auto iter = mNurseryEntries.Iter(); !iter.Done(); iter.Next()) {
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AllocEvent& oldEvent = mAllocEvents[iter.Data().mEventIdx];
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AllocEvent newEvent(oldEvent.mTraceIdx, -oldEvent.mSize, TimeStamp::Now());
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mAllocEvents.AppendElement(newEvent);
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}
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mNurseryEntries.Clear();
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}
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void
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GCHeapProfilerImpl::moveNurseryToTenured(void* addrOld, void* addrNew)
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{
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AutoUseUncensoredAllocator ua;
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AutoMPLock lock(mLock);
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AllocEntry entryOld;
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if (!mNurseryEntries.Get(addrOld, &entryOld)) {
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return;
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}
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// Because the tenured heap is sampled, the address might already be there.
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// If not, the address is inserted with the old event.
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AllocEntry tenuredEntryOld;
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if (!mTenuredEntriesFG.Get(addrNew, &tenuredEntryOld)) {
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mTenuredEntriesFG.Put(addrNew, AllocEntry(entryOld.mEventIdx));
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} else {
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// If it is already inserted, the insertion above will fail and the
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// iterator of the already-inserted element is returned.
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// We choose to ignore the the new event by setting its size zero and point
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// the newly allocated address to the old event.
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// An event of size zero will be skipped when reporting.
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mAllocEvents[entryOld.mEventIdx].mSize = 0;
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tenuredEntryOld.mEventIdx = entryOld.mEventIdx;
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mTenuredEntriesFG.Put(addrNew, tenuredEntryOld);
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}
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mNurseryEntries.Remove(addrOld);
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}
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void
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GCHeapProfilerImpl::SampleInternal(void* aAddr, uint32_t aSize, AllocMap& aTable)
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{
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AutoUseUncensoredAllocator ua;
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AutoMPLock lock(mLock);
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size_t nSamples = AddBytesSampled(aSize);
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if (nSamples > 0) {
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nsTArray<nsCString> trace = GetStacktrace();
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AllocEvent ai(mTraceTable.Insert(trace), nSamples * mSampleSize, TimeStamp::Now());
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aTable.Put(aAddr, AllocEntry(mAllocEvents.Length()));
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mAllocEvents.AppendElement(ai);
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}
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}
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} // namespace mozilla
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