mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-24 14:26:09 +03:00
68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
// Copyright 2017 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.
|
|
|
|
#ifndef BASE_MEMORY_SHARED_MEMORY_TRACKER_H_
|
|
#define BASE_MEMORY_SHARED_MEMORY_TRACKER_H_
|
|
|
|
#include <map>
|
|
#include <string>
|
|
|
|
#include "base/memory/shared_memory.h"
|
|
#include "base/synchronization/lock.h"
|
|
#include "base/trace_event/memory_dump_provider.h"
|
|
|
|
namespace base {
|
|
|
|
namespace trace_event {
|
|
class MemoryAllocatorDump;
|
|
class MemoryAllocatorDumpGuid;
|
|
class ProcessMemoryDump;
|
|
}
|
|
|
|
// SharedMemoryTracker tracks shared memory usage.
|
|
class BASE_EXPORT SharedMemoryTracker : public trace_event::MemoryDumpProvider {
|
|
public:
|
|
// Returns a singleton instance.
|
|
static SharedMemoryTracker* GetInstance();
|
|
|
|
static std::string GetDumpNameForTracing(const UnguessableToken& id);
|
|
|
|
static trace_event::MemoryAllocatorDumpGuid GetGlobalDumpIdForTracing(
|
|
const UnguessableToken& id);
|
|
|
|
// Gets or creates if non-existant, a memory dump for the |shared_memory|
|
|
// inside the given |pmd|. Also adds the necessary edges for the dump when
|
|
// creating the dump.
|
|
static const trace_event::MemoryAllocatorDump* GetOrCreateSharedMemoryDump(
|
|
const SharedMemory* shared_memory,
|
|
trace_event::ProcessMemoryDump* pmd);
|
|
|
|
// Records shared memory usage on mapping.
|
|
void IncrementMemoryUsage(const SharedMemory& shared_memory);
|
|
|
|
// Records shared memory usage on unmapping.
|
|
void DecrementMemoryUsage(const SharedMemory& shared_memory);
|
|
|
|
// Root dump name for all shared memory dumps.
|
|
static const char kDumpRootName[];
|
|
|
|
private:
|
|
SharedMemoryTracker();
|
|
~SharedMemoryTracker() override;
|
|
|
|
// trace_event::MemoryDumpProvider implementation.
|
|
bool OnMemoryDump(const trace_event::MemoryDumpArgs& args,
|
|
trace_event::ProcessMemoryDump* pmd) override;
|
|
|
|
// Used to lock when |usages_| is modified or read.
|
|
Lock usages_lock_;
|
|
std::map<const SharedMemory*, size_t> usages_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(SharedMemoryTracker);
|
|
};
|
|
|
|
} // namespace base
|
|
|
|
#endif // BASE_MEMORY_SHARED_MEMORY_TRACKER_H_
|