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browser_main_loop.cc
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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_loop.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/debug/trace_event.h"
#include "base/file_util.h"
#include "base/logging.h"
#include "base/message_loop/message_loop.h"
#include "base/metrics/field_trial.h"
#include "base/metrics/histogram.h"
#include "base/path_service.h"
#include "base/pending_task.h"
#include "base/power_monitor/power_monitor.h"
#include "base/power_monitor/power_monitor_device_source.h"
#include "base/process/process_metrics.h"
#include "base/run_loop.h"
#include "base/strings/string_number_conversions.h"
#include "base/system_monitor/system_monitor.h"
#include "base/thread_task_runner_handle.h"
#include "base/threading/thread_restrictions.h"
#include "base/timer/hi_res_timer_manager.h"
#include "content/browser/browser_thread_impl.h"
#include "content/browser/device_orientation/device_inertial_sensor_service.h"
#include "content/browser/download/save_file_manager.h"
#include "content/browser/gamepad/gamepad_service.h"
#include "content/browser/gpu/browser_gpu_channel_host_factory.h"
#include "content/browser/gpu/compositor_util.h"
#include "content/browser/gpu/gpu_data_manager_impl.h"
#include "content/browser/gpu/gpu_process_host.h"
#include "content/browser/gpu/gpu_process_host_ui_shim.h"
#include "content/browser/histogram_synchronizer.h"
#include "content/browser/loader/resource_dispatcher_host_impl.h"
#include "content/browser/media/media_internals.h"
#include "content/browser/net/browser_online_state_observer.h"
#include "content/browser/plugin_service_impl.h"
#include "content/browser/renderer_host/media/audio_mirroring_manager.h"
#include "content/browser/renderer_host/media/media_stream_manager.h"
#include "content/browser/renderer_host/render_process_host_impl.h"
#include "content/browser/speech/speech_recognition_manager_impl.h"
#include "content/browser/startup_task_runner.h"
#include "content/browser/webui/content_web_ui_controller_factory.h"
#include "content/browser/webui/url_data_manager.h"
#include "content/public/browser/browser_main_parts.h"
#include "content/public/browser/browser_shutdown.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/tracing_controller.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/main_function_params.h"
#include "content/public/common/result_codes.h"
#include "crypto/nss_util.h"
#include "media/audio/audio_manager.h"
#include "media/base/media.h"
#include "media/base/user_input_monitor.h"
#include "media/midi/midi_manager.h"
#include "net/base/network_change_notifier.h"
#include "net/socket/client_socket_factory.h"
#include "net/ssl/ssl_config_service.h"
#include "ui/base/clipboard/clipboard.h"
#if defined(USE_AURA)
#include "content/browser/compositor/image_transport_factory.h"
#endif
#if defined(OS_ANDROID)
#include "base/android/jni_android.h"
#include "content/browser/android/browser_startup_controller.h"
#include "content/browser/android/surface_texture_peer_browser_impl.h"
#include "ui/gl/gl_surface.h"
#endif
#if defined(OS_MACOSX) && !defined(OS_IOS)
#include "content/browser/theme_helper_mac.h"
#endif
#if defined(OS_WIN)
#include <windows.h>
#include <commctrl.h>
#include <shellapi.h>
#include "content/browser/system_message_window_win.h"
#include "content/common/sandbox_win.h"
#include "net/base/winsock_init.h"
#include "ui/base/l10n/l10n_util_win.h"
#endif
#if defined(USE_GLIB)
#include <glib-object.h>
#endif
#if defined(OS_LINUX) && defined(USE_UDEV)
#include "content/browser/device_monitor_udev.h"
#elif defined(OS_MACOSX) && !defined(OS_IOS)
#include "content/browser/device_monitor_mac.h"
#endif
#if defined(TOOLKIT_GTK)
#include "ui/gfx/gtk_util.h"
#endif
#if defined(OS_POSIX) && !defined(OS_MACOSX)
#include <sys/stat.h>
#include "content/browser/renderer_host/render_sandbox_host_linux.h"
#include "content/browser/zygote_host/zygote_host_impl_linux.h"
#endif
#if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
#include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
#endif
#if defined(USE_X11)
#include <X11/Xlib.h>
#endif
#if defined(USE_OZONE)
#include "ui/ozone/ozone_platform.h"
#endif
// One of the linux specific headers defines this as a macro.
#ifdef DestroyAll
#undef DestroyAll
#endif
namespace content {
namespace {
#if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
void SetupSandbox(const CommandLine& parsed_command_line) {
TRACE_EVENT0("startup", "SetupSandbox");
// TODO(evanm): move this into SandboxWrapper; I'm just trying to move this
// code en masse out of chrome_main for now.
base::FilePath sandbox_binary;
bool env_chrome_devel_sandbox_set = false;
struct stat st;
const bool want_setuid_sandbox =
!parsed_command_line.HasSwitch(switches::kNoSandbox) &&
!parsed_command_line.HasSwitch(switches::kDisableSetuidSandbox);
if (want_setuid_sandbox) {
base::FilePath exe_dir;
if (PathService::Get(base::DIR_EXE, &exe_dir)) {
base::FilePath sandbox_candidate = exe_dir.AppendASCII("chrome-sandbox");
if (base::PathExists(sandbox_candidate))
sandbox_binary = sandbox_candidate;
}
// In user-managed builds, including development builds, an environment
// variable is required to enable the sandbox. See
// http://code.google.com/p/chromium/wiki/LinuxSUIDSandboxDevelopment
if (sandbox_binary.empty() &&
stat(base::kProcSelfExe, &st) == 0 && st.st_uid == getuid()) {
const char* devel_sandbox_path = getenv("CHROME_DEVEL_SANDBOX");
if (devel_sandbox_path) {
env_chrome_devel_sandbox_set = true;
sandbox_binary = base::FilePath(devel_sandbox_path);
}
}
static const char no_suid_error[] = "Running without the SUID sandbox! See "
"https://code.google.com/p/chromium/wiki/LinuxSUIDSandboxDevelopment "
"for more information on developing with the sandbox on.";
if (sandbox_binary.empty()) {
if (!env_chrome_devel_sandbox_set) {
// This needs to be fatal. Talk to security@chromium.org if you feel
// otherwise.
LOG(FATAL) << no_suid_error;
}
// TODO(jln): an empty CHROME_DEVEL_SANDBOX environment variable (as
// opposed to a non existing one) is not fatal yet. This is needed
// because of existing bots and scripts. Fix it (crbug.com/245376).
LOG(ERROR) << no_suid_error;
}
}
// Tickle the sandbox host and zygote host so they fork now.
RenderSandboxHostLinux::GetInstance()->Init(sandbox_binary.value());
ZygoteHostImpl::GetInstance()->Init(sandbox_binary.value());
}
#endif
#if defined(USE_GLIB)
static void GLibLogHandler(const gchar* log_domain,
GLogLevelFlags log_level,
const gchar* message,
gpointer userdata) {
if (!log_domain)
log_domain = "<unknown>";
if (!message)
message = "<no message>";
if (strstr(message, "Loading IM context type") ||
strstr(message, "wrong ELF class: ELFCLASS64")) {
// http://crbug.com/9643
// Until we have a real 64-bit build or all of these 32-bit package issues
// are sorted out, don't fatal on ELF 32/64-bit mismatch warnings and don't
// spam the user with more than one of them.
static bool alerted = false;
if (!alerted) {
LOG(ERROR) << "Bug 9643: " << log_domain << ": " << message;
alerted = true;
}
} else if (strstr(message, "Unable to retrieve the file info for")) {
LOG(ERROR) << "GTK File code error: " << message;
} else if (strstr(message, "Could not find the icon") &&
strstr(log_domain, "Gtk")) {
LOG(ERROR) << "GTK icon error: " << message;
} else if (strstr(message, "Theme file for default has no") ||
strstr(message, "Theme directory") ||
strstr(message, "theme pixmap") ||
strstr(message, "locate theme engine")) {
LOG(ERROR) << "GTK theme error: " << message;
} else if (strstr(message, "Unable to create Ubuntu Menu Proxy") &&
strstr(log_domain, "<unknown>")) {
LOG(ERROR) << "GTK menu proxy create failed";
} else if (strstr(message, "gtk_drag_dest_leave: assertion")) {
LOG(ERROR) << "Drag destination deleted: http://crbug.com/18557";
} else if (strstr(message, "Out of memory") &&
strstr(log_domain, "<unknown>")) {
LOG(ERROR) << "DBus call timeout or out of memory: "
<< "http://crosbug.com/15496";
} else if (strstr(message, "Could not connect: Connection refused") &&
strstr(log_domain, "<unknown>")) {
LOG(ERROR) << "DConf settings backend could not connect to session bus: "
<< "http://crbug.com/179797";
} else if (strstr(message, "XDG_RUNTIME_DIR variable not set")) {
LOG(ERROR) << message << " (http://bugs.chromium.org/97293)";
} else if (strstr(message, "Attempting to store changes into") ||
strstr(message, "Attempting to set the permissions of")) {
LOG(ERROR) << message << " (http://bugs.chromium.org/161366)";
} else if (strstr(message, "drawable is not a native X11 window")) {
LOG(ERROR) << message << " (http://bugs.chromium.org/329991)";
} else {
LOG(DFATAL) << log_domain << ": " << message;
}
}
static void SetUpGLibLogHandler() {
// Register GLib-handled assertions to go through our logging system.
const char* kLogDomains[] = { NULL, "Gtk", "Gdk", "GLib", "GLib-GObject" };
for (size_t i = 0; i < arraysize(kLogDomains); i++) {
g_log_set_handler(kLogDomains[i],
static_cast<GLogLevelFlags>(G_LOG_FLAG_RECURSION |
G_LOG_FLAG_FATAL |
G_LOG_LEVEL_ERROR |
G_LOG_LEVEL_CRITICAL |
G_LOG_LEVEL_WARNING),
GLibLogHandler,
NULL);
}
}
#endif
} // namespace
// The currently-running BrowserMainLoop. There can be one or zero.
BrowserMainLoop* g_current_browser_main_loop = NULL;
// This is just to be able to keep ShutdownThreadsAndCleanUp out of
// the public interface of BrowserMainLoop.
class BrowserShutdownImpl {
public:
static void ImmediateShutdownAndExitProcess() {
DCHECK(g_current_browser_main_loop);
g_current_browser_main_loop->ShutdownThreadsAndCleanUp();
#if defined(OS_WIN)
// At this point the message loop is still running yet we've shut everything
// down. If any messages are processed we'll likely crash. Exit now.
ExitProcess(RESULT_CODE_NORMAL_EXIT);
#elif defined(OS_POSIX) && !defined(OS_MACOSX)
_exit(RESULT_CODE_NORMAL_EXIT);
#else
NOTIMPLEMENTED();
#endif
}
};
void ImmediateShutdownAndExitProcess() {
BrowserShutdownImpl::ImmediateShutdownAndExitProcess();
}
// For measuring memory usage after each task. Behind a command line flag.
class BrowserMainLoop::MemoryObserver : public base::MessageLoop::TaskObserver {
public:
MemoryObserver() {}
virtual ~MemoryObserver() {}
virtual void WillProcessTask(const base::PendingTask& pending_task) OVERRIDE {
}
virtual void DidProcessTask(const base::PendingTask& pending_task) OVERRIDE {
#if !defined(OS_IOS) // No ProcessMetrics on IOS.
scoped_ptr<base::ProcessMetrics> process_metrics(
base::ProcessMetrics::CreateProcessMetrics(
#if defined(OS_MACOSX)
base::GetCurrentProcessHandle(), NULL));
#else
base::GetCurrentProcessHandle()));
#endif
size_t private_bytes;
process_metrics->GetMemoryBytes(&private_bytes, NULL);
HISTOGRAM_MEMORY_KB("Memory.BrowserUsed", private_bytes >> 10);
#endif
}
private:
DISALLOW_COPY_AND_ASSIGN(MemoryObserver);
};
// BrowserMainLoop construction / destruction =============================
BrowserMainLoop* BrowserMainLoop::GetInstance() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
return g_current_browser_main_loop;
}
BrowserMainLoop::BrowserMainLoop(const MainFunctionParams& parameters)
: parameters_(parameters),
parsed_command_line_(parameters.command_line),
result_code_(RESULT_CODE_NORMAL_EXIT),
created_threads_(false),
// ContentMainRunner should have enabled tracing of the browser process
// when kTraceStartup is in the command line.
is_tracing_startup_(
parameters.command_line.HasSwitch(switches::kTraceStartup)) {
DCHECK(!g_current_browser_main_loop);
g_current_browser_main_loop = this;
}
BrowserMainLoop::~BrowserMainLoop() {
DCHECK_EQ(this, g_current_browser_main_loop);
#if !defined(OS_IOS)
ui::Clipboard::DestroyClipboardForCurrentThread();
#endif // !defined(OS_IOS)
g_current_browser_main_loop = NULL;
}
void BrowserMainLoop::Init() {
TRACE_EVENT0("startup", "BrowserMainLoop::Init")
parts_.reset(
GetContentClient()->browser()->CreateBrowserMainParts(parameters_));
}
// BrowserMainLoop stages ==================================================
void BrowserMainLoop::EarlyInitialization() {
TRACE_EVENT0("startup", "BrowserMainLoop::EarlyInitialization");
#if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
// No thread should be created before this call, as SetupSandbox()
// will end-up using fork().
SetupSandbox(parsed_command_line_);
#endif
#if defined(USE_X11)
if (parsed_command_line_.HasSwitch(switches::kSingleProcess) ||
parsed_command_line_.HasSwitch(switches::kInProcessGPU)) {
if (!XInitThreads()) {
LOG(ERROR) << "Failed to put Xlib into threaded mode.";
}
}
#endif
// GLib's spawning of new processes is buggy, so it's important that at this
// point GLib does not need to start DBUS. Chrome should always start with
// DBUS_SESSION_BUS_ADDRESS properly set. See crbug.com/309093.
#if defined(USE_GLIB)
// g_type_init will be deprecated in 2.36. 2.35 is the development
// version for 2.36, hence do not call g_type_init starting 2.35.
// http://developer.gnome.org/gobject/unstable/gobject-Type-Information.html#g-type-init
#if !GLIB_CHECK_VERSION(2, 35, 0)
// GLib type system initialization. Needed at least for gconf,
// used in net/proxy/proxy_config_service_linux.cc. Most likely
// this is superfluous as gtk_init() ought to do this. It's
// definitely harmless, so retained as a reminder of this
// requirement for gconf.
g_type_init();
#endif
#if !defined(USE_AURA)
gfx::GtkInitFromCommandLine(parsed_command_line_);
#endif
SetUpGLibLogHandler();
#endif
if (parts_)
parts_->PreEarlyInitialization();
#if defined(OS_WIN)
net::EnsureWinsockInit();
#endif
#if !defined(USE_OPENSSL)
// We want to be sure to init NSPR on the main thread.
crypto::EnsureNSPRInit();
#endif // !defined(USE_OPENSSL)
#if !defined(OS_IOS)
if (parsed_command_line_.HasSwitch(switches::kRendererProcessLimit)) {
std::string limit_string = parsed_command_line_.GetSwitchValueASCII(
switches::kRendererProcessLimit);
size_t process_limit;
if (base::StringToSizeT(limit_string, &process_limit)) {
RenderProcessHost::SetMaxRendererProcessCount(process_limit);
}
}
#endif // !defined(OS_IOS)
if (parts_)
parts_->PostEarlyInitialization();
}
void BrowserMainLoop::MainMessageLoopStart() {
TRACE_EVENT0("startup", "BrowserMainLoop::MainMessageLoopStart")
if (parts_) {
TRACE_EVENT0("startup",
"BrowserMainLoop::MainMessageLoopStart:PreMainMessageLoopStart");
parts_->PreMainMessageLoopStart();
}
#if defined(OS_WIN)
// If we're running tests (ui_task is non-null), then the ResourceBundle
// has already been initialized.
if (!parameters_.ui_task) {
// Override the configured locale with the user's preferred UI language.
l10n_util::OverrideLocaleWithUILanguageList();
}
#endif
// Create a MessageLoop if one does not already exist for the current thread.
if (!base::MessageLoop::current())
main_message_loop_.reset(new base::MessageLoopForUI);
InitializeMainThread();
{
TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SystemMonitor")
system_monitor_.reset(new base::SystemMonitor);
}
{
TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:PowerMonitor")
scoped_ptr<base::PowerMonitorSource> power_monitor_source(
new base::PowerMonitorDeviceSource());
power_monitor_.reset(new base::PowerMonitor(power_monitor_source.Pass()));
}
{
TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:HighResTimerManager")
hi_res_timer_manager_.reset(new base::HighResolutionTimerManager);
}
{
TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:NetworkChangeNotifier")
network_change_notifier_.reset(net::NetworkChangeNotifier::Create());
}
#if !defined(OS_IOS)
{
TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MediaFeatures")
media::InitializeCPUSpecificMediaFeatures();
}
{
TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:AudioMan")
audio_manager_.reset(media::AudioManager::Create(
MediaInternals::GetInstance()));
}
{
TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MidiManager")
midi_manager_.reset(media::MidiManager::Create());
}
{
TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:ContentWebUIController")
WebUIControllerFactory::RegisterFactory(
ContentWebUIControllerFactory::GetInstance());
}
{
TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:AudioMirroringManager")
audio_mirroring_manager_.reset(new AudioMirroringManager());
}
// Start tracing to a file if needed.
if (is_tracing_startup_) {
TRACE_EVENT0("startup", "BrowserMainLoop::InitStartupTracing")
InitStartupTracing(parsed_command_line_);
}
{
TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:OnlineStateObserver")
online_state_observer_.reset(new BrowserOnlineStateObserver);
}
{
system_stats_monitor_.reset(new base::debug::TraceEventSystemStatsMonitor(
base::ThreadTaskRunnerHandle::Get()));
}
#endif // !defined(OS_IOS)
#if defined(OS_WIN)
system_message_window_.reset(new SystemMessageWindowWin);
#endif
if (parts_)
parts_->PostMainMessageLoopStart();
#if defined(OS_ANDROID)
{
TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SurfaceTexturePeer")
SurfaceTexturePeer::InitInstance(new SurfaceTexturePeerBrowserImpl());
}
#endif
if (parsed_command_line_.HasSwitch(switches::kMemoryMetrics)) {
TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MemoryObserver")
memory_observer_.reset(new MemoryObserver());
base::MessageLoop::current()->AddTaskObserver(memory_observer_.get());
}
#if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
trace_memory_controller_.reset(new base::debug::TraceMemoryController(
base::MessageLoop::current()->message_loop_proxy(),
::HeapProfilerWithPseudoStackStart,
::HeapProfilerStop,
::GetHeapProfile));
#endif
}
int BrowserMainLoop::PreCreateThreads() {
if (parts_) {
TRACE_EVENT0("startup",
"BrowserMainLoop::CreateThreads:PreCreateThreads");
result_code_ = parts_->PreCreateThreads();
}
#if defined(ENABLE_PLUGINS)
// Prior to any processing happening on the io thread, we create the
// plugin service as it is predominantly used from the io thread,
// but must be created on the main thread. The service ctor is
// inexpensive and does not invoke the io_thread() accessor.
{
TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads:PluginService")
PluginService::GetInstance()->Init();
}
#endif
#if !defined(OS_IOS) && (!defined(GOOGLE_CHROME_BUILD) || defined(OS_ANDROID))
// Single-process is an unsupported and not fully tested mode, so
// don't enable it for official Chrome builds (except on Android).
if (parsed_command_line_.HasSwitch(switches::kSingleProcess))
RenderProcessHost::SetRunRendererInProcess(true);
#endif
return result_code_;
}
void BrowserMainLoop::CreateStartupTasks() {
TRACE_EVENT0("startup", "BrowserMainLoop::CreateStartupTasks");
// First time through, we really want to create all the tasks
if (!startup_task_runner_.get()) {
#if defined(OS_ANDROID)
startup_task_runner_ = make_scoped_ptr(new StartupTaskRunner(
base::Bind(&BrowserStartupComplete),
base::MessageLoop::current()->message_loop_proxy()));
#else
startup_task_runner_ = make_scoped_ptr(new StartupTaskRunner(
base::Callback<void(int)>(),
base::MessageLoop::current()->message_loop_proxy()));
#endif
StartupTask pre_create_threads =
base::Bind(&BrowserMainLoop::PreCreateThreads, base::Unretained(this));
startup_task_runner_->AddTask(pre_create_threads);
StartupTask create_threads =
base::Bind(&BrowserMainLoop::CreateThreads, base::Unretained(this));
startup_task_runner_->AddTask(create_threads);
StartupTask browser_thread_started = base::Bind(
&BrowserMainLoop::BrowserThreadsStarted, base::Unretained(this));
startup_task_runner_->AddTask(browser_thread_started);
StartupTask pre_main_message_loop_run = base::Bind(
&BrowserMainLoop::PreMainMessageLoopRun, base::Unretained(this));
startup_task_runner_->AddTask(pre_main_message_loop_run);
#if defined(OS_ANDROID)
if (BrowserMayStartAsynchronously()) {
startup_task_runner_->StartRunningTasksAsync();
}
#endif
}
#if defined(OS_ANDROID)
if (!BrowserMayStartAsynchronously()) {
// A second request for asynchronous startup can be ignored, so
// StartupRunningTasksAsync is only called first time through. If, however,
// this is a request for synchronous startup then it must override any
// previous call for async startup, so we call RunAllTasksNow()
// unconditionally.
startup_task_runner_->RunAllTasksNow();
}
#else
startup_task_runner_->RunAllTasksNow();
#endif
}
int BrowserMainLoop::CreateThreads() {
TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads");
base::Thread::Options default_options;
base::Thread::Options io_message_loop_options;
io_message_loop_options.message_loop_type = base::MessageLoop::TYPE_IO;
base::Thread::Options ui_message_loop_options;
ui_message_loop_options.message_loop_type = base::MessageLoop::TYPE_UI;
// Start threads in the order they occur in the BrowserThread::ID
// enumeration, except for BrowserThread::UI which is the main
// thread.
//
// Must be size_t so we can increment it.
for (size_t thread_id = BrowserThread::UI + 1;
thread_id < BrowserThread::ID_COUNT;
++thread_id) {
scoped_ptr<BrowserProcessSubThread>* thread_to_start = NULL;
base::Thread::Options* options = &default_options;
switch (thread_id) {
case BrowserThread::DB:
TRACE_EVENT_BEGIN1("startup",
"BrowserMainLoop::CreateThreads:start",
"Thread", "BrowserThread::DB");
thread_to_start = &db_thread_;
break;
case BrowserThread::FILE_USER_BLOCKING:
TRACE_EVENT_BEGIN1("startup",
"BrowserMainLoop::CreateThreads:start",
"Thread", "BrowserThread::FILE_USER_BLOCKING");
thread_to_start = &file_user_blocking_thread_;
break;
case BrowserThread::FILE:
TRACE_EVENT_BEGIN1("startup",
"BrowserMainLoop::CreateThreads:start",
"Thread", "BrowserThread::FILE");
thread_to_start = &file_thread_;
#if defined(OS_WIN)
// On Windows, the FILE thread needs to be have a UI message loop
// which pumps messages in such a way that Google Update can
// communicate back to us.
options = &ui_message_loop_options;
#else
options = &io_message_loop_options;
#endif
break;
case BrowserThread::PROCESS_LAUNCHER:
TRACE_EVENT_BEGIN1("startup",
"BrowserMainLoop::CreateThreads:start",
"Thread", "BrowserThread::PROCESS_LAUNCHER");
thread_to_start = &process_launcher_thread_;
break;
case BrowserThread::CACHE:
TRACE_EVENT_BEGIN1("startup",
"BrowserMainLoop::CreateThreads:start",
"Thread", "BrowserThread::CACHE");
thread_to_start = &cache_thread_;
options = &io_message_loop_options;
break;
case BrowserThread::IO:
TRACE_EVENT_BEGIN1("startup",
"BrowserMainLoop::CreateThreads:start",
"Thread", "BrowserThread::IO");
thread_to_start = &io_thread_;
options = &io_message_loop_options;
break;
case BrowserThread::UI:
case BrowserThread::ID_COUNT:
default:
NOTREACHED();
break;
}
BrowserThread::ID id = static_cast<BrowserThread::ID>(thread_id);
if (thread_to_start) {
(*thread_to_start).reset(new BrowserProcessSubThread(id));
(*thread_to_start)->StartWithOptions(*options);
} else {
NOTREACHED();
}
TRACE_EVENT_END0("startup", "BrowserMainLoop::CreateThreads:start");
}
created_threads_ = true;
return result_code_;
}
int BrowserMainLoop::PreMainMessageLoopRun() {
if (parts_) {
TRACE_EVENT0("startup",
"BrowserMainLoop::CreateThreads:PreMainMessageLoopRun");
parts_->PreMainMessageLoopRun();
}
// If the UI thread blocks, the whole UI is unresponsive.
// Do not allow disk IO from the UI thread.
base::ThreadRestrictions::SetIOAllowed(false);
base::ThreadRestrictions::DisallowWaiting();
return result_code_;
}
void BrowserMainLoop::RunMainMessageLoopParts() {
TRACE_EVENT_BEGIN_ETW("BrowserMain:MESSAGE_LOOP", 0, "");
bool ran_main_loop = false;
if (parts_)
ran_main_loop = parts_->MainMessageLoopRun(&result_code_);
if (!ran_main_loop)
MainMessageLoopRun();
TRACE_EVENT_END_ETW("BrowserMain:MESSAGE_LOOP", 0, "");
}
void BrowserMainLoop::ShutdownThreadsAndCleanUp() {
if (!created_threads_) {
// Called early, nothing to do
return;
}
TRACE_EVENT0("shutdown", "BrowserMainLoop::ShutdownThreadsAndCleanUp")
// Teardown may start in PostMainMessageLoopRun, and during teardown we
// need to be able to perform IO.
base::ThreadRestrictions::SetIOAllowed(true);
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(base::IgnoreResult(&base::ThreadRestrictions::SetIOAllowed),
true));
if (RenderProcessHost::run_renderer_in_process())
RenderProcessHostImpl::ShutDownInProcessRenderer();
if (parts_) {
TRACE_EVENT0("shutdown",
"BrowserMainLoop::Subsystem:PostMainMessageLoopRun");
parts_->PostMainMessageLoopRun();
}
trace_memory_controller_.reset();
system_stats_monitor_.reset();
#if !defined(OS_IOS)
// Destroying the GpuProcessHostUIShims on the UI thread posts a task to
// delete related objects on the GPU thread. This must be done before
// stopping the GPU thread. The GPU thread will close IPC channels to renderer
// processes so this has to happen before stopping the IO thread.
{
TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUProcessHostShim");
GpuProcessHostUIShim::DestroyAll();
}
// Cancel pending requests and prevent new requests.
if (resource_dispatcher_host_) {
TRACE_EVENT0("shutdown",
"BrowserMainLoop::Subsystem:ResourceDispatcherHost");
resource_dispatcher_host_.get()->Shutdown();
}
#if defined(USE_AURA)
{
TRACE_EVENT0("shutdown",
"BrowserMainLoop::Subsystem:ImageTransportFactory");
ImageTransportFactory::Terminate();
}
#endif
#if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
ZygoteHostImpl::GetInstance()->TearDownAfterLastChild();
#endif // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
// The device monitors are using |system_monitor_| as dependency, so delete
// them before |system_monitor_| goes away.
// On Mac and windows, the monitor needs to be destroyed on the same thread
// as they were created. On Linux, the monitor will be deleted when IO thread
// goes away.
#if defined(OS_WIN)
system_message_window_.reset();
#elif defined(OS_MACOSX)
device_monitor_mac_.reset();
#endif
#endif // !defined(OS_IOS)
// Must be size_t so we can subtract from it.
for (size_t thread_id = BrowserThread::ID_COUNT - 1;
thread_id >= (BrowserThread::UI + 1);
--thread_id) {
// Find the thread object we want to stop. Looping over all valid
// BrowserThread IDs and DCHECKing on a missing case in the switch
// statement helps avoid a mismatch between this code and the
// BrowserThread::ID enumeration.
//
// The destruction order is the reverse order of occurrence in the
// BrowserThread::ID list. The rationale for the order is as
// follows (need to be filled in a bit):
//
//
// - The IO thread is the only user of the CACHE thread.
//
// - The PROCESS_LAUNCHER thread must be stopped after IO in case
// the IO thread posted a task to terminate a process on the
// process launcher thread.
//
// - (Not sure why DB stops last.)
switch (thread_id) {
case BrowserThread::DB: {
TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:DBThread");
db_thread_.reset();
}
break;
case BrowserThread::FILE_USER_BLOCKING: {
TRACE_EVENT0("shutdown",
"BrowserMainLoop::Subsystem:FileUserBlockingThread");
file_user_blocking_thread_.reset();
}
break;
case BrowserThread::FILE: {
TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:FileThread");
#if !defined(OS_IOS)
// Clean up state that lives on or uses the file_thread_ before
// it goes away.
if (resource_dispatcher_host_)
resource_dispatcher_host_.get()->save_file_manager()->Shutdown();
#endif // !defined(OS_IOS)
file_thread_.reset();
}
break;
case BrowserThread::PROCESS_LAUNCHER: {
TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:LauncherThread");
process_launcher_thread_.reset();
}
break;
case BrowserThread::CACHE: {
TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:CacheThread");
cache_thread_.reset();
}
break;
case BrowserThread::IO: {
TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IOThread");
io_thread_.reset();
}
break;
case BrowserThread::UI:
case BrowserThread::ID_COUNT:
default:
NOTREACHED();
break;
}
}
#if !defined(OS_IOS)
{
TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IndexedDBThread");
indexed_db_thread_.reset();
}
#endif
// Close the blocking I/O pool after the other threads. Other threads such
// as the I/O thread may need to schedule work like closing files or flushing
// data during shutdown, so the blocking pool needs to be available. There
// may also be slow operations pending that will blcok shutdown, so closing
// it here (which will block until required operations are complete) gives
// more head start for those operations to finish.
{
TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:ThreadPool");
BrowserThreadImpl::ShutdownThreadPool();
}
#if !defined(OS_IOS)
// Must happen after the IO thread is shutdown since this may be accessed from
// it.
{
TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUChannelFactory");
if (BrowserGpuChannelHostFactory::instance())
BrowserGpuChannelHostFactory::Terminate();
}
// Must happen after the I/O thread is shutdown since this class lives on the
// I/O thread and isn't threadsafe.
{
TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GamepadService");
GamepadService::GetInstance()->Terminate();
}
{
TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:SensorService");
DeviceInertialSensorService::GetInstance()->Shutdown();
}
{
TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:DeleteDataSources");
URLDataManager::DeleteDataSources();
}
#endif // !defined(OS_IOS)
if (parts_) {
TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:PostDestroyThreads");
parts_->PostDestroyThreads();
}
}
void BrowserMainLoop::InitializeMainThread() {
TRACE_EVENT0("startup", "BrowserMainLoop::InitializeMainThread")
const char* kThreadName = "CrBrowserMain";
base::PlatformThread::SetName(kThreadName);
if (main_message_loop_)
main_message_loop_->set_thread_name(kThreadName);
// Register the main thread by instantiating it, but don't call any methods.
main_thread_.reset(
new BrowserThreadImpl(BrowserThread::UI, base::MessageLoop::current()));
}
int BrowserMainLoop::BrowserThreadsStarted() {
TRACE_EVENT0("startup", "BrowserMainLoop::BrowserThreadsStarted")
#if !defined(OS_IOS)
indexed_db_thread_.reset(new base::Thread("IndexedDB"));
indexed_db_thread_->Start();
#endif
#if defined(OS_ANDROID)
// Up the priority of anything that touches with display tasks
// (this thread is UI thread, and io_thread_ is for IPCs).
io_thread_->SetPriority(base::kThreadPriority_Display);
base::PlatformThread::SetThreadPriority(
base::PlatformThread::CurrentHandle(),
base::kThreadPriority_Display);
#endif
#if !defined(OS_IOS)
HistogramSynchronizer::GetInstance();
#if defined(OS_ANDROID)
// On Android, GLSurface::InitializeOneOff() must be called before initalizing
// the GpuDataManagerImpl as it uses the GL bindings. crbug.com/326295
if (!gfx::GLSurface::InitializeOneOff())
LOG(FATAL) << "GLSurface::InitializeOneOff failed";
#endif
// Initialize the GpuDataManager before we set up the MessageLoops because
// otherwise we'll trigger the assertion about doing IO on the UI thread.
GpuDataManagerImpl::GetInstance()->Initialize();
bool always_uses_gpu = IsForceCompositingModeEnabled();
bool established_gpu_channel = false;
#if defined(USE_AURA) || defined(OS_ANDROID)
established_gpu_channel =
!parsed_command_line_.HasSwitch(switches::kDisableGpuProcessPrelaunch) ||
parsed_command_line_.HasSwitch(switches::kSingleProcess) ||
parsed_command_line_.HasSwitch(switches::kInProcessGPU);
#if defined(USE_AURA)
if (!GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor()) {
established_gpu_channel = always_uses_gpu = false;
}
BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
ImageTransportFactory::Initialize();
#elif defined(OS_ANDROID)
BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
#endif
#endif
#if defined(OS_LINUX) && defined(USE_UDEV)
device_monitor_linux_.reset(new DeviceMonitorLinux());
#elif defined(OS_MACOSX)
device_monitor_mac_.reset(new DeviceMonitorMac());
#endif
#if defined(USE_OZONE)
ui::OzonePlatform::Initialize();
ui::EventFactoryOzone::GetInstance()->SetFileTaskRunner(
BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE));
#endif
// RDH needs the IO thread to be created
{
TRACE_EVENT0("startup",
"BrowserMainLoop::BrowserThreadsStarted:InitResourceDispatcherHost");
resource_dispatcher_host_.reset(new ResourceDispatcherHostImpl());
}
// MediaStreamManager needs the IO thread to be created.
{
TRACE_EVENT0("startup",
"BrowserMainLoop::BrowserThreadsStarted:InitMediaStreamManager");
media_stream_manager_.reset(new MediaStreamManager(audio_manager_.get()));
}
{
TRACE_EVENT0("startup",