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// Copyright (c) 2012 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 "content/browser/browser_main_runner_impl.h"
#include "base/base_switches.h"
#include "base/check.h"
#include "base/command_line.h"
#include "base/debug/debugger.h"
#include "base/debug/leak_annotations.h"
#include "base/lazy_instance.h"
#include "base/metrics/histogram_macros.h"
#include "base/run_loop.h"
#include "base/synchronization/atomic_flag.h"
#include "base/time/time.h"
#include "base/trace_event/heap_profiler_allocation_context_tracker.h"
#include "base/trace_event/trace_event.h"
#include "build/build_config.h"
#include "components/tracing/common/trace_startup_config.h"
#include "components/tracing/common/tracing_switches.h"
#include "content/browser/browser_main_loop.h"
#include "content/browser/notification_service_impl.h"
#include "content/browser/tracing/tracing_controller_impl.h"
#include "content/common/content_switches_internal.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/main_function_params.h"
#include "third_party/skia/include/core/SkGraphics.h"
#include "ui/base/ime/init/input_method_initializer.h"
#include "ui/gfx/font_util.h"
#if defined(OS_ANDROID)
#include "content/browser/android/tracing_controller_android.h"
#endif
#if defined(OS_WIN)
#include "base/win/windows_version.h"
#include "ui/base/win/scoped_ole_initializer.h"
#endif
namespace content {
namespace {
base::LazyInstance<base::AtomicFlag>::Leaky g_exited_main_message_loop;
} // namespace
// static
std::unique_ptr<BrowserMainRunnerImpl> BrowserMainRunnerImpl::Create() {
return std::make_unique<BrowserMainRunnerImpl>();
}
BrowserMainRunnerImpl::BrowserMainRunnerImpl()
: initialization_started_(false),
is_shutdown_(false),
scoped_execution_fence_(
std::make_unique<base::ThreadPoolInstance::ScopedExecutionFence>()) {}
BrowserMainRunnerImpl::~BrowserMainRunnerImpl() {
if (initialization_started_ && !is_shutdown_)
Shutdown();
}
int BrowserMainRunnerImpl::Initialize(const MainFunctionParams& parameters) {
SCOPED_UMA_HISTOGRAM_LONG_TIMER(
"Startup.BrowserMainRunnerImplInitializeLongTime");
TRACE_EVENT0("startup", "BrowserMainRunnerImpl::Initialize");
// On Android we normally initialize the browser in a series of UI thread
// tasks. While this is happening a second request can come from the OS or
// another application to start the browser. If this happens then we must
// not run these parts of initialization twice.
if (!initialization_started_) {
initialization_started_ = true;
const base::TimeTicks start_time_step1 = base::TimeTicks::Now();
SkGraphics::Init();
if (parameters.command_line.HasSwitch(switches::kWaitForDebugger))
base::debug::WaitForDebugger(60, true);
if (parameters.command_line.HasSwitch(switches::kBrowserStartupDialog))
WaitForDebugger("Browser");
notification_service_.reset(new NotificationServiceImpl);
#if defined(OS_WIN)
#if !defined(TOOLKIT_QT)
// Ole must be initialized before starting message pump, so that TSF
// (Text Services Framework) module can interact with the message pump
// on Windows 8 Metro mode.
ole_initializer_.reset(new ui::ScopedOleInitializer);
#endif
#endif // OS_WIN
gfx::InitializeFonts();
main_loop_.reset(
new BrowserMainLoop(parameters, std::move(scoped_execution_fence_)));
main_loop_->Init();
if (parameters.created_main_parts_closure) {
std::move(*parameters.created_main_parts_closure)
.Run(main_loop_->parts());
delete parameters.created_main_parts_closure;
}
const int early_init_error_code = main_loop_->EarlyInitialization();
if (early_init_error_code > 0)
return early_init_error_code;
// Must happen before we try to use a message loop or display any UI.
if (!main_loop_->InitializeToolkit())
return 1;
main_loop_->PreMainMessageLoopStart();
main_loop_->MainMessageLoopStart();
main_loop_->PostMainMessageLoopStart();
// WARNING: If we get a WM_ENDSESSION, objects created on the stack here
// are NOT deleted. If you need something to run during WM_ENDSESSION add it
// to browser_shutdown::Shutdown or BrowserProcess::EndSession.
ui::InitializeInputMethod();
UMA_HISTOGRAM_TIMES("Startup.BrowserMainRunnerImplInitializeStep1Time",
base::TimeTicks::Now() - start_time_step1);
}
const base::TimeTicks start_time_step2 = base::TimeTicks::Now();
main_loop_->CreateStartupTasks();
int result_code = main_loop_->GetResultCode();
if (result_code > 0)
return result_code;
UMA_HISTOGRAM_TIMES("Startup.BrowserMainRunnerImplInitializeStep2Time",
base::TimeTicks::Now() - start_time_step2);
// Return -1 to indicate no early termination.
return -1;
}
#if defined(OS_ANDROID)
void BrowserMainRunnerImpl::SynchronouslyFlushStartupTasks() {
main_loop_->SynchronouslyFlushStartupTasks();
}
#endif
int BrowserMainRunnerImpl::Run() {
DCHECK(initialization_started_);
DCHECK(!is_shutdown_);
main_loop_->RunMainMessageLoopParts();
return main_loop_->GetResultCode();
}
void BrowserMainRunnerImpl::Shutdown() {
DCHECK(initialization_started_);
DCHECK(!is_shutdown_);
#ifdef LEAK_SANITIZER
// Invoke leak detection now, to avoid dealing with shutdown-only leaks.
// Normally this will have already happened in
// BroserProcessImpl::ReleaseModule(), so this call has no effect. This is
// only for processes which do not instantiate a BrowserProcess.
// If leaks are found, the process will exit here.
__lsan_do_leak_check();
#endif
main_loop_->PreShutdown();
// Finalize the startup tracing session if it is still active.
if (TracingControllerImpl::GetInstance())
TracingControllerImpl::GetInstance()->FinalizeStartupTracingIfNeeded();
{
// The trace event has to stay between profiler creation and destruction.
TRACE_EVENT0("shutdown", "BrowserMainRunner");
g_exited_main_message_loop.Get().Set();
main_loop_->ShutdownThreadsAndCleanUp();
ui::ShutdownInputMethod();
#if defined(OS_WIN) && !defined(TOOLKIT_QT)
ole_initializer_.reset(NULL);
#endif
#if defined(OS_ANDROID)
// Forcefully terminates the RunLoop inside MessagePumpForUI, ensuring
// proper shutdown for content_browsertests. Shutdown() is not used by
// the actual browser.
if (base::RunLoop::IsRunningOnCurrentThread())
base::RunLoop::QuitCurrentDeprecated();
#endif
main_loop_.reset(nullptr);
notification_service_.reset(nullptr);
is_shutdown_ = true;
}
}
// static
std::unique_ptr<BrowserMainRunner> BrowserMainRunner::Create() {
return BrowserMainRunnerImpl::Create();
}
// static
bool BrowserMainRunner::ExitedMainMessageLoop() {
return g_exited_main_message_loop.IsCreated() &&
g_exited_main_message_loop.Get().IsSet();
}
} // namespace content
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