blob: ff0032e8c9d7ac35375d6981f2c0996bbbda0e52 [file] [log] [blame]
// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/macros.h"
#include "base/memory/singleton.h"
#include "base/synchronization/lock.h"
#include "base/threading/platform_thread.h"
#include "base/trace_event/memory_dump_provider.h"
#include "base/trace_event/sharded_allocation_register.h"
#include "build/build_config.h"
#if defined(OS_LINUX) || defined(OS_ANDROID) || defined(OS_WIN) || \
(defined(OS_MACOSX) && !defined(OS_IOS))
namespace base {
namespace trace_event {
// Dump provider which collects process-wide memory stats.
class BASE_EXPORT MallocDumpProvider : public MemoryDumpProvider {
// Name of the allocated_objects dump. Use this to declare suballocator dumps
// from other dump providers.
static const char kAllocatedObjects[];
static MallocDumpProvider* GetInstance();
// MemoryDumpProvider implementation.
bool OnMemoryDump(const MemoryDumpArgs& args,
ProcessMemoryDump* pmd) override;
void OnHeapProfilingEnabled(bool enabled) override;
// For heap profiling.
void InsertAllocation(void* address, size_t size);
void RemoveAllocation(void* address);
// Used by out-of-process heap-profiling. When malloc is profiled by an
// external process, that process will be responsible for emitting metrics on
// behalf of this one. Thus, MallocDumpProvider should not do anything.
void EnableMetrics();
void DisableMetrics();
friend struct DefaultSingletonTraits<MallocDumpProvider>;
~MallocDumpProvider() override;
// For heap profiling.
ShardedAllocationRegister allocation_register_;
// When in OnMemoryDump(), this contains the current thread ID.
// This is to prevent re-entrancy in the heap profiler when the heap dump
// generation is malloc/new-ing for its own bookkeeping data structures.
PlatformThreadId tid_dumping_heap_;
bool emit_metrics_on_memory_dump_ = true;
base::Lock emit_metrics_on_memory_dump_lock_;
} // namespace trace_event
} // namespace base