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// 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.
#ifndef COMPONENTS_TRACING_COMMON_PROCESS_MEMORY_METRICS_DUMP_PROVIDER_H_
#define COMPONENTS_TRACING_COMMON_PROCESS_MEMORY_METRICS_DUMP_PROVIDER_H_
#include <memory>
#include "base/files/scoped_file.h"
#include "base/gtest_prod_util.h"
#include "base/macros.h"
#include "base/process/process_handle.h"
#include "base/trace_event/memory_dump_provider.h"
#include "build/build_config.h"
#include "components/tracing/tracing_export.h"
namespace base {
class ProcessMetrics;
}
namespace tracing {
// Dump provider which collects process-wide memory stats.
class TRACING_EXPORT ProcessMetricsMemoryDumpProvider
: public base::trace_event::MemoryDumpProvider {
public:
// Pass base::kNullProcessId to register for current process.
static void RegisterForProcess(base::ProcessId process);
static void UnregisterForProcess(base::ProcessId process);
~ProcessMetricsMemoryDumpProvider() override;
// MemoryDumpProvider implementation.
bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args,
base::trace_event::ProcessMemoryDump* pmd) override;
void PollFastMemoryTotal(uint64_t* memory_total) override;
void SuspendFastMemoryPolling() override;
private:
FRIEND_TEST_ALL_PREFIXES(ProcessMetricsMemoryDumpProviderTest,
ParseProcSmaps);
FRIEND_TEST_ALL_PREFIXES(ProcessMetricsMemoryDumpProviderTest, DumpRSS);
FRIEND_TEST_ALL_PREFIXES(ProcessMetricsMemoryDumpProviderTest,
TestPollFastMemoryTotal);
ProcessMetricsMemoryDumpProvider(base::ProcessId process);
bool DumpProcessTotals(const base::trace_event::MemoryDumpArgs& args,
base::trace_event::ProcessMemoryDump* pmd);
bool DumpProcessMemoryMaps(const base::trace_event::MemoryDumpArgs& args,
base::trace_event::ProcessMemoryDump* pmd);
static uint64_t rss_bytes_for_testing;
#if defined(OS_LINUX) || defined(OS_ANDROID)
static FILE* proc_smaps_for_testing;
static int fast_polling_statm_fd_for_testing;
base::ScopedFD fast_polling_statm_fd_;
#endif
base::ProcessId process_;
std::unique_ptr<base::ProcessMetrics> process_metrics_;
// The peak may not be resettable on all the processes if the linux kernel is
// older than http://bit.ly/reset_rss or only on child processes if yama LSM
// sandbox is enabled.
bool is_rss_peak_resettable_;
DISALLOW_COPY_AND_ASSIGN(ProcessMetricsMemoryDumpProvider);
};
} // namespace tracing
#endif // COMPONENTS_TRACING_COMMON_PROCESS_MEMORY_METRICS_DUMP_PROVIDER_H_
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