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