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content / public / common / profiling.cc [blame]
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/public/common/profiling.h"
#include "base/at_exit.h"
#include "base/base_switches.h"
#include "base/command_line.h"
#include "base/debug/profiler.h"
#include "base/functional/bind.h"
#include "base/lazy_instance.h"
#include "base/location.h"
#include "base/memory/raw_ptr.h"
#include "base/no_destructor.h"
#include "base/strings/string_util.h"
#include "base/threading/thread.h"
#include "base/time/time.h"
#include "content/public/common/content_switches.h"
namespace content {
namespace {
std::string GetProfileName() {
static base::NoDestructor<std::string> profile_name([]() {
std::string profile_name;
const base::CommandLine& command_line =
*base::CommandLine::ForCurrentProcess();
if (command_line.HasSwitch(switches::kProfilingFile))
profile_name = command_line.GetSwitchValueASCII(switches::kProfilingFile);
else
profile_name = std::string("chrome-profile-{type}-{pid}");
std::string process_type =
command_line.GetSwitchValueASCII(switches::kProcessType);
std::string type = process_type.empty() ? std::string("browser")
: std::string(process_type);
base::ReplaceSubstringsAfterOffset(&profile_name, 0, "{type}", type);
return profile_name;
}());
return *profile_name;
}
void FlushProfilingData(base::Thread* thread) {
static const int kProfilingFlushSeconds = 10;
if (!Profiling::BeingProfiled())
return;
base::debug::FlushProfiling();
static int flush_seconds;
if (!flush_seconds) {
const base::CommandLine& command_line =
*base::CommandLine::ForCurrentProcess();
std::string profiling_flush =
command_line.GetSwitchValueASCII(switches::kProfilingFlush);
if (!profiling_flush.empty()) {
flush_seconds = atoi(profiling_flush.c_str());
DCHECK(flush_seconds > 0);
} else {
flush_seconds = kProfilingFlushSeconds;
}
}
thread->task_runner()->PostDelayedTask(
FROM_HERE, base::BindOnce(&FlushProfilingData, thread),
base::Seconds(flush_seconds));
}
class ProfilingThreadControl {
public:
ProfilingThreadControl() : thread_(nullptr) {}
ProfilingThreadControl(const ProfilingThreadControl&) = delete;
ProfilingThreadControl& operator=(const ProfilingThreadControl&) = delete;
void Start() {
base::AutoLock locked(lock_);
if (thread_ && thread_->IsRunning())
return;
thread_ = new base::Thread("Profiling_Flush");
thread_->Start();
thread_->task_runner()->PostTask(
FROM_HERE, base::BindOnce(&FlushProfilingData, thread_));
}
void Stop() {
base::AutoLock locked(lock_);
if (!thread_ || !thread_->IsRunning())
return;
thread_->Stop();
delete thread_;
thread_ = nullptr;
}
private:
raw_ptr<base::Thread> thread_;
base::Lock lock_;
};
base::LazyInstance<ProfilingThreadControl>::Leaky g_flush_thread_control =
LAZY_INSTANCE_INITIALIZER;
} // namespace
// static
void Profiling::ProcessStarted() {
const base::CommandLine& command_line =
*base::CommandLine::ForCurrentProcess();
std::string process_type =
command_line.GetSwitchValueASCII(switches::kProcessType);
if (command_line.HasSwitch(switches::kProfilingAtStart)) {
std::string process_type_to_start =
command_line.GetSwitchValueASCII(switches::kProfilingAtStart);
if (process_type == process_type_to_start)
Start();
}
}
// static
void Profiling::Start() {
const base::CommandLine& command_line =
*base::CommandLine::ForCurrentProcess();
bool flush = command_line.HasSwitch(switches::kProfilingFlush);
base::debug::StartProfiling(GetProfileName());
// Schedule profile data flushing for single process because it doesn't
// get written out correctly on exit.
if (flush)
g_flush_thread_control.Get().Start();
}
// static
void Profiling::Stop() {
g_flush_thread_control.Get().Stop();
base::debug::StopProfiling();
}
// static
bool Profiling::BeingProfiled() {
return base::debug::BeingProfiled();
}
// static
void Profiling::Toggle() {
if (BeingProfiled())
Stop();
else
Start();
}
} // namespace content