127 lines
2.7 KiB
C++
127 lines
2.7 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 "UncensoredAllocator.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/unused.h"
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#include "MainThreadUtils.h"
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#include "jsfriendapi.h"
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#include "nsDebug.h"
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#include "prlock.h"
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#ifdef MOZ_REPLACE_MALLOC
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#include "replace_malloc_bridge.h"
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#endif
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namespace mozilla {
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#ifdef MOZ_REPLACE_MALLOC
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ThreadLocal<bool> MallocHook::mEnabledTLS;
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NativeProfiler* MallocHook::mNativeProfiler;
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malloc_hook_table_t MallocHook::mMallocHook;
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#endif
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AutoUseUncensoredAllocator::AutoUseUncensoredAllocator()
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{
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#ifdef MOZ_REPLACE_MALLOC
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MallocHook::mEnabledTLS.set(false);
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#endif
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}
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AutoUseUncensoredAllocator::~AutoUseUncensoredAllocator()
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{
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#ifdef MOZ_REPLACE_MALLOC
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MallocHook::mEnabledTLS.set(true);
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#endif
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}
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bool
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MallocHook::Enabled()
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{
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#ifdef MOZ_REPLACE_MALLOC
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return mEnabledTLS.get() && mNativeProfiler;
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#else
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return false;
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#endif
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}
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void*
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MallocHook::SampleNative(void* aAddr, size_t aSize)
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{
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#ifdef MOZ_REPLACE_MALLOC
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if (MallocHook::Enabled()) {
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mNativeProfiler->sampleNative(aAddr, aSize);
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}
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#endif
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return aAddr;
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}
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void
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MallocHook::RemoveNative(void* aAddr)
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{
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#ifdef MOZ_REPLACE_MALLOC
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if (MallocHook::Enabled()) {
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mNativeProfiler->removeNative(aAddr);
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}
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#endif
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}
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void
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MallocHook::Initialize()
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{
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#ifdef MOZ_REPLACE_MALLOC
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MOZ_ASSERT(NS_IsMainThread());
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mMallocHook.free_hook = RemoveNative;
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mMallocHook.malloc_hook = SampleNative;
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ReplaceMallocBridge* bridge = ReplaceMallocBridge::Get(3);
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if (bridge) {
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mozilla::Unused << bridge->RegisterHook("memory-profiler", nullptr, nullptr);
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}
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if (!mEnabledTLS.initialized()) {
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bool success = mEnabledTLS.init();
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if (NS_WARN_IF(!success)) {
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return;
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}
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mEnabledTLS.set(false);
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}
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#endif
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}
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void
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MallocHook::Enable(NativeProfiler* aNativeProfiler)
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{
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#ifdef MOZ_REPLACE_MALLOC
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MOZ_ASSERT(NS_IsMainThread());
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if (NS_WARN_IF(!mEnabledTLS.initialized())) {
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return;
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}
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ReplaceMallocBridge* bridge = ReplaceMallocBridge::Get(3);
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if (bridge) {
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const malloc_table_t* alloc_funcs =
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bridge->RegisterHook("memory-profiler", nullptr, &mMallocHook);
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if (alloc_funcs) {
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mNativeProfiler = aNativeProfiler;
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}
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}
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#endif
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}
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void
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MallocHook::Disable()
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{
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#ifdef MOZ_REPLACE_MALLOC
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MOZ_ASSERT(NS_IsMainThread());
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ReplaceMallocBridge* bridge = ReplaceMallocBridge::Get(3);
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if (bridge) {
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bridge->RegisterHook("memory-profiler", nullptr, nullptr);
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mNativeProfiler = nullptr;
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}
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#endif
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}
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} // namespace mozilla
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