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