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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 <stddef.h>
#include <algorithm>
#include <string>
#include <utility>
#include <vector>
#include "base/base_switches.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/feature_list.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/memory/memory_coordinator_proxy.h"
#include "base/memory/memory_pressure_monitor.h"
#include "base/memory/ptr_util.h"
#include "base/message_loop/message_loop.h"
#include "base/metrics/field_trial.h"
#include "base/metrics/histogram_macros.h"
#include "base/metrics/user_metrics.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/single_thread_task_runner.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/synchronization/waitable_event.h"
#include "base/system_monitor/system_monitor.h"
#include "base/task_scheduler/initialization_util.h"
#include "base/task_scheduler/post_task.h"
#include "base/task_scheduler/single_thread_task_runner_thread_mode.h"
#include "base/task_scheduler/task_scheduler.h"
#include "base/task_scheduler/task_traits.h"
#include "base/threading/sequenced_worker_pool.h"
#include "base/threading/thread_restrictions.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/time/time.h"
#include "base/timer/hi_res_timer_manager.h"
#include "base/trace_event/memory_dump_manager.h"
#include "base/trace_event/trace_event.h"
#include "build/build_config.h"
#include "components/discardable_memory/service/discardable_shared_memory_manager.h"
#include "components/tracing/common/trace_config_file.h"
#include "components/tracing/common/trace_to_console.h"
#include "components/tracing/common/tracing_switches.h"
#include "components/viz/common/switches.h"
#include "components/viz/host/host_frame_sink_manager.h"
#include "components/viz/service/display_embedder/server_shared_bitmap_manager.h"
#include "components/viz/service/frame_sinks/frame_sink_manager_impl.h"
#include "content/browser/browser_thread_impl.h"
#include "content/browser/child_process_security_policy_impl.h"
#include "content/browser/compositor/surface_utils.h"
#include "content/browser/dom_storage/dom_storage_area.h"
#include "content/browser/download/download_resource_handler.h"
#include "content/browser/download/save_file_manager.h"
#include "content/browser/gpu/browser_gpu_channel_host_factory.h"
#include "content/browser/gpu/browser_gpu_memory_buffer_manager.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/shader_cache_factory.h"
#include "content/browser/histogram_synchronizer.h"
#include "content/browser/leveldb_wrapper_impl.h"
#include "content/browser/loader/resource_dispatcher_host_impl.h"
#include "content/browser/loader_delegate_impl.h"
#include "content/browser/media/media_internals.h"
#include "content/browser/memory/memory_coordinator_impl.h"
#include "content/browser/memory/swap_metrics_delegate_uma.h"
#include "content/browser/net/browser_online_state_observer.h"
#include "content/browser/renderer_host/media/media_stream_manager.h"
#include "content/browser/renderer_host/render_process_host_impl.h"
#include "content/browser/service_manager/service_manager_context.h"
#include "content/browser/speech/speech_recognition_manager_impl.h"
#include "content/browser/startup_task_runner.h"
#include "content/browser/utility_process_host_impl.h"
#include "content/browser/webui/content_web_ui_controller_factory.h"
#include "content/browser/webui/url_data_manager.h"
#include "content/common/content_switches_internal.h"
#include "content/common/service_manager/service_manager_connection_impl.h"
#include "content/common/task_scheduler.h"
#include "content/public/browser/browser_main_parts.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/gpu_data_manager_observer.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/swap_metrics_driver.h"
#include "content/public/browser/tracing_controller.h"
#include "content/public/common/content_client.h"
#include "content/public/common/content_features.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/main_function_params.h"
#include "content/public/common/result_codes.h"
#include "content/public/common/service_names.mojom.h"
#include "device/gamepad/gamepad_service.h"
#include "gpu/vulkan/features.h"
#include "media/audio/audio_manager.h"
#include "media/audio/audio_system_impl.h"
#include "media/audio/audio_thread_impl.h"
#include "media/base/media.h"
#include "media/base/user_input_monitor.h"
#include "media/media_features.h"
#include "media/midi/midi_service.h"
#include "media/mojo/features.h"
#include "mojo/edk/embedder/embedder.h"
#include "mojo/edk/embedder/scoped_ipc_support.h"
#include "net/base/network_change_notifier.h"
#include "net/socket/client_socket_factory.h"
#include "net/ssl/ssl_config_service.h"
#include "ppapi/features/features.h"
#include "services/resource_coordinator/memory_instrumentation/coordinator_impl.h"
#include "services/resource_coordinator/public/cpp/memory_instrumentation/client_process_impl.h"
#include "services/service_manager/runner/common/client_util.h"
#include "skia/ext/event_tracer_impl.h"
#include "skia/ext/skia_memory_dump_provider.h"
#include "sql/sql_memory_dump_provider.h"
#include "third_party/boringssl/src/include/openssl/evp.h"
#include "ui/base/clipboard/clipboard.h"
#include "ui/gfx/switches.h"
#if defined(USE_AURA) || defined(OS_MACOSX)
#include "content/browser/compositor/image_transport_factory.h"
#endif
#if defined(USE_AURA)
#include "content/public/browser/context_factory.h"
#include "ui/aura/env.h"
#endif
#if defined(OS_ANDROID)
#include "base/android/jni_android.h"
#include "components/tracing/common/graphics_memory_dump_provider_android.h"
#include "content/browser/android/browser_startup_controller.h"
#include "content/browser/android/launcher_thread.h"
#include "content/browser/android/scoped_surface_request_manager.h"
#include "content/browser/android/tracing_controller_android.h"
#include "content/browser/media/android/browser_media_player_manager.h"
#include "content/browser/screen_orientation/screen_orientation_delegate_android.h"
#include "media/base/android/media_drm_bridge_client.h"
#include "ui/android/screen_android.h"
#include "ui/display/screen.h"
#include "ui/gl/gl_surface.h"
#endif
#if defined(OS_MACOSX)
#include "base/allocator/allocator_interception_mac.h"
#include "base/memory/memory_pressure_monitor_mac.h"
#include "content/browser/bootstrap_sandbox_manager_mac.h"
#include "content/browser/cocoa/system_hotkey_helper_mac.h"
#include "content/browser/mach_broker_mac.h"
#include "content/browser/renderer_host/browser_compositor_view_mac.h"
#include "content/browser/theme_helper_mac.h"
#include "ui/accelerated_widget_mac/window_resize_helper_mac.h"
#endif
#if defined(OS_WIN)
#include <windows.h>
#include <commctrl.h>
#include <shellapi.h>
#include "base/memory/memory_pressure_monitor_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(OS_CHROMEOS)
#include "base/memory/memory_pressure_monitor_chromeos.h"
#include "chromeos/chromeos_switches.h"
#endif
#if defined(USE_GLIB)
#include <glib-object.h>
#endif
#if defined(OS_WIN)
#include "media/device_monitors/system_message_window_win.h"
#elif defined(OS_LINUX) && defined(USE_UDEV)
#include "media/device_monitors/device_monitor_udev.h"
#elif defined(OS_MACOSX)
#include "media/device_monitors/device_monitor_mac.h"
#endif
#if defined(OS_POSIX) && !defined(OS_MACOSX)
#include "content/browser/renderer_host/render_sandbox_host_linux.h"
#include "content/browser/zygote_host/zygote_host_impl_linux.h"
#if !defined(OS_ANDROID)
#include "content/browser/zygote_host/zygote_communication_linux.h"
#include "content/public/browser/zygote_handle_linux.h"
#endif // !defined(OS_ANDROID)
#endif // defined(OS_POSIX) && !defined(OS_MACOSX)
#if BUILDFLAG(ENABLE_PLUGINS)
#include "content/browser/plugin_service_impl.h"
#endif
#if BUILDFLAG(ENABLE_MOJO_CDM) && BUILDFLAG(ENABLE_LIBRARY_CDMS)
#include "content/browser/media/cdm_registry_impl.h"
#endif
#if defined(USE_X11)
#include "gpu/config/gpu_driver_bug_workaround_type.h"
#include "ui/base/x/x11_util_internal.h" // nogncheck
#include "ui/gfx/x/x11_connection.h" // nogncheck
#include "ui/gfx/x/x11_types.h" // nogncheck
#endif
#if defined(USE_NSS_CERTS)
#include "crypto/nss_util.h"
#endif
#if BUILDFLAG(ENABLE_VULKAN)
#include "gpu/vulkan/vulkan_implementation.h"
#endif
// One of the linux specific headers defines this as a macro.
#ifdef DestroyAll
#undef DestroyAll
#endif
namespace content {
namespace {
bool IsUsingMus() {
#if defined(USE_AURA)
return aura::Env::GetInstance()->mode() == aura::Env::Mode::MUS;
#else
return false;
#endif
}
#if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
void SetupSandbox(const base::CommandLine& parsed_command_line) {
TRACE_EVENT0("startup", "SetupSandbox");
// RenderSandboxHostLinux needs to be initialized even if the sandbox and
// zygote are both disabled. It initializes the renderer socket.
RenderSandboxHostLinux::GetInstance()->Init();
if (parsed_command_line.HasSwitch(switches::kNoZygote) &&
!parsed_command_line.HasSwitch(switches::kNoSandbox)) {
LOG(ERROR) << "--no-sandbox should be used together with --no--zygote";
exit(EXIT_FAILURE);
}
// Tickle the zygote host so it forks now.
ZygoteHostImpl::GetInstance()->Init(parsed_command_line);
ZygoteHandle generic_zygote = CreateGenericZygote();
// TODO(kerrnel): Investigate doing this without the ZygoteHostImpl as a
// proxy. It is currently done this way due to concerns about race
// conditions.
ZygoteHostImpl::GetInstance()->SetRendererSandboxStatus(
generic_zygote->GetSandboxStatus());
}
#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>";
GLogLevelFlags always_fatal_flags = g_log_set_always_fatal(G_LOG_LEVEL_MASK);
g_log_set_always_fatal(always_fatal_flags);
GLogLevelFlags fatal_flags =
g_log_set_fatal_mask(log_domain, G_LOG_LEVEL_MASK);
g_log_set_fatal_mask(log_domain, fatal_flags);
if ((always_fatal_flags | fatal_flags) & log_level) {
LOG(DFATAL) << log_domain << ": " << message;
} else if (log_level & (G_LOG_LEVEL_ERROR | G_LOG_LEVEL_CRITICAL)) {
LOG(ERROR) << log_domain << ": " << message;
} else if (log_level & (G_LOG_LEVEL_WARNING)) {
LOG(WARNING) << log_domain << ": " << message;
} else if (log_level &
(G_LOG_LEVEL_MESSAGE | G_LOG_LEVEL_INFO | G_LOG_LEVEL_DEBUG)) {
LOG(INFO) << log_domain << ": " << message;
} else {
NOTREACHED();
LOG(DFATAL) << log_domain << ": " << message;
}
}
static void SetUpGLibLogHandler() {
// Register GLib-handled assertions to go through our logging system.
const char* const kLogDomains[] =
{ nullptr, "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 // defined(USE_GLIB)
void OnStoppedStartupTracing(const base::FilePath& trace_file) {
VLOG(0) << "Completed startup tracing to " << trace_file.value();
}
// Disable optimizations for this block of functions so the compiler doesn't
// merge them all together. This makes it possible to tell what thread was
// unresponsive by inspecting the callstack.
MSVC_DISABLE_OPTIMIZE()
MSVC_PUSH_DISABLE_WARNING(4748)
NOINLINE void ResetThread_DB() {
volatile int inhibit_comdat = __LINE__;
ALLOW_UNUSED_LOCAL(inhibit_comdat);
BrowserThreadImpl::StopRedirectionOfThreadID(BrowserThread::DB);
}
NOINLINE void ResetThread_FILE() {
volatile int inhibit_comdat = __LINE__;
ALLOW_UNUSED_LOCAL(inhibit_comdat);
BrowserThreadImpl::StopRedirectionOfThreadID(BrowserThread::FILE);
}
NOINLINE void ResetThread_FILE_USER_BLOCKING() {
volatile int inhibit_comdat = __LINE__;
ALLOW_UNUSED_LOCAL(inhibit_comdat);
BrowserThreadImpl::StopRedirectionOfThreadID(
BrowserThread::FILE_USER_BLOCKING);
}
#if defined(OS_ANDROID)
NOINLINE void ResetThread_PROCESS_LAUNCHER(
std::unique_ptr<BrowserProcessSubThread> thread) {
volatile int inhibit_comdat = __LINE__;
ALLOW_UNUSED_LOCAL(inhibit_comdat);
thread.reset();
}
#else // defined(OS_ANDROID)
NOINLINE void ResetThread_PROCESS_LAUNCHER() {
volatile int inhibit_comdat = __LINE__;
ALLOW_UNUSED_LOCAL(inhibit_comdat);
BrowserThreadImpl::StopRedirectionOfThreadID(BrowserThread::PROCESS_LAUNCHER);
}
#endif // defined(OS_ANDROID)
#if defined(OS_WIN)
NOINLINE void ResetThread_CACHE(
std::unique_ptr<BrowserProcessSubThread> thread) {
volatile int inhibit_comdat = __LINE__;
ALLOW_UNUSED_LOCAL(inhibit_comdat);
thread.reset();
}
#else // defined(OS_WIN)
NOINLINE void ResetThread_CACHE() {
volatile int inhibit_comdat = __LINE__;
ALLOW_UNUSED_LOCAL(inhibit_comdat);
BrowserThreadImpl::StopRedirectionOfThreadID(BrowserThread::CACHE);
}
#endif // defined(OS_WIN)
NOINLINE void ResetThread_IO(std::unique_ptr<BrowserProcessSubThread> thread) {
volatile int inhibit_comdat = __LINE__;
ALLOW_UNUSED_LOCAL(inhibit_comdat);
thread.reset();
}
MSVC_POP_WARNING()
MSVC_ENABLE_OPTIMIZE();
#if defined(OS_WIN)
// Creates a memory pressure monitor using automatic thresholds, or those
// specified on the command-line. Ownership is passed to the caller.
std::unique_ptr<base::win::MemoryPressureMonitor>
CreateWinMemoryPressureMonitor(const base::CommandLine& parsed_command_line) {
std::vector<std::string> thresholds =
base::SplitString(parsed_command_line.GetSwitchValueASCII(
switches::kMemoryPressureThresholdsMb),
",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
int moderate_threshold_mb = 0;
int critical_threshold_mb = 0;
if (thresholds.size() == 2 &&
base::StringToInt(thresholds[0], &moderate_threshold_mb) &&
base::StringToInt(thresholds[1], &critical_threshold_mb) &&
moderate_threshold_mb >= critical_threshold_mb &&
critical_threshold_mb >= 0) {
return base::MakeUnique<base::win::MemoryPressureMonitor>(
moderate_threshold_mb, critical_threshold_mb);
}
// In absence of valid switches use the automatic defaults.
return base::MakeUnique<base::win::MemoryPressureMonitor>();
}
#endif // defined(OS_WIN)
enum WorkerPoolType : size_t {
BACKGROUND = 0,
BACKGROUND_BLOCKING,
FOREGROUND,
FOREGROUND_BLOCKING,
WORKER_POOL_COUNT // Always last.
};
std::unique_ptr<base::TaskScheduler::InitParams>
GetDefaultTaskSchedulerInitParams() {
#if defined(OS_ANDROID)
// Mobile config, for iOS see ios/web/app/web_main_loop.cc.
return base::MakeUnique<base::TaskScheduler::InitParams>(
base::SchedulerWorkerPoolParams(
base::RecommendedMaxNumberOfThreadsInPool(2, 8, 0.1, 0),
base::TimeDelta::FromSeconds(30)),
base::SchedulerWorkerPoolParams(
base::RecommendedMaxNumberOfThreadsInPool(2, 8, 0.1, 0),
base::TimeDelta::FromSeconds(30)),
base::SchedulerWorkerPoolParams(
base::RecommendedMaxNumberOfThreadsInPool(3, 8, 0.3, 0),
base::TimeDelta::FromSeconds(30)),
base::SchedulerWorkerPoolParams(
base::RecommendedMaxNumberOfThreadsInPool(3, 8, 0.3, 0),
base::TimeDelta::FromSeconds(60)));
#else
// Desktop config.
return base::MakeUnique<base::TaskScheduler::InitParams>(
base::SchedulerWorkerPoolParams(
base::RecommendedMaxNumberOfThreadsInPool(3, 8, 0.1, 0),
base::TimeDelta::FromSeconds(30)),
base::SchedulerWorkerPoolParams(
base::RecommendedMaxNumberOfThreadsInPool(3, 8, 0.1, 0),
base::TimeDelta::FromSeconds(40)),
base::SchedulerWorkerPoolParams(
base::RecommendedMaxNumberOfThreadsInPool(8, 32, 0.3, 0),
base::TimeDelta::FromSeconds(30)),
// Tasks posted to SequencedWorkerPool or BrowserThreadImpl may be
// redirected to this pool. Since COM STA is initialized in these
// environments, it must also be initialized in this pool.
base::SchedulerWorkerPoolParams(
base::RecommendedMaxNumberOfThreadsInPool(8, 32, 0.3, 0),
base::TimeDelta::FromSeconds(60),
base::SchedulerBackwardCompatibility::INIT_COM_STA));
#endif
}
// Time between updating and recording swap rates.
constexpr base::TimeDelta kSwapMetricsInterval =
base::TimeDelta::FromSeconds(60);
} // namespace
#if defined(USE_X11) && !defined(OS_CHROMEOS)
namespace internal {
// Forwards GPUInfo updates to ui::XVisualManager
class GpuDataManagerVisualProxy : public GpuDataManagerObserver {
public:
explicit GpuDataManagerVisualProxy(GpuDataManagerImpl* gpu_data_manager)
: gpu_data_manager_(gpu_data_manager) {
gpu_data_manager_->AddObserver(this);
}
~GpuDataManagerVisualProxy() override {
gpu_data_manager_->RemoveObserver(this);
}
void OnGpuInfoUpdate() override {
if (base::CommandLine::ForCurrentProcess()->HasSwitch(switches::kHeadless))
return;
gpu::GPUInfo gpu_info = gpu_data_manager_->GetGPUInfo();
if (!ui::XVisualManager::GetInstance()->OnGPUInfoChanged(
gpu_info.software_rendering ||
!gpu_data_manager_->GpuAccessAllowed(nullptr),
gpu_info.system_visual, gpu_info.rgba_visual)) {
// The GPU process sent back bad visuals, which should never happen.
auto* gpu_process_host = GpuProcessHost::Get(
GpuProcessHost::GPU_PROCESS_KIND_SANDBOXED, false);
if (gpu_process_host)
gpu_process_host->ForceShutdown();
}
}
private:
GpuDataManagerImpl* gpu_data_manager_;
DISALLOW_COPY_AND_ASSIGN(GpuDataManagerVisualProxy);
};
} // namespace internal
#endif
// The currently-running BrowserMainLoop. There can be one or zero.
BrowserMainLoop* g_current_browser_main_loop = NULL;
#if defined(OS_ANDROID)
bool g_browser_main_loop_shutting_down = false;
#endif
// BrowserMainLoop construction / destruction =============================
BrowserMainLoop* BrowserMainLoop::GetInstance() {
DCHECK_CURRENTLY_ON(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 or kTraceConfigFile is in the command line.
is_tracing_startup_for_duration_(
parameters.command_line.HasSwitch(switches::kTraceStartup) ||
(tracing::TraceConfigFile::GetInstance()->IsEnabled() &&
tracing::TraceConfigFile::GetInstance()->GetStartupDuration() > 0)) {
DCHECK(!g_current_browser_main_loop);
g_current_browser_main_loop = this;
// Use an empty string as TaskScheduler name to match the suffix of browser
// process TaskScheduler histograms.
base::TaskScheduler::Create("");
}
BrowserMainLoop::~BrowserMainLoop() {
DCHECK_EQ(this, g_current_browser_main_loop);
ui::Clipboard::DestroyClipboardForCurrentThread();
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 (UsingInProcessGpu()) {
if (!gfx::InitializeThreadedX11()) {
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 // !GLIB_CHECK_VERSION(2, 35, 0)
SetUpGLibLogHandler();
#endif // defined(USE_GLIB)
if (parts_)
parts_->PreEarlyInitialization();
#if defined(OS_MACOSX) || defined(OS_LINUX) || defined(OS_CHROMEOS)
// We use quite a few file descriptors for our IPC as well as disk the disk
// cache,and the default limit on the Mac is low (256), so bump it up.
// Same for Linux. The default various per distro, but it is 1024 on Fedora.
// Low soft limits combined with liberal use of file descriptors means power
// users can easily hit this limit with many open tabs. Bump up the limit to
// an arbitrarily high number. See https://crbug.com/539567
base::SetFdLimit(8192);
#endif // defined(OS_MACOSX) || defined(OS_LINUX) || defined(OS_CHROMEOS)
#if defined(OS_WIN)
net::EnsureWinsockInit();
#endif
#if defined(USE_NSS_CERTS)
// We want to be sure to init NSPR on the main thread.
crypto::EnsureNSPRInit();
#endif
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);
}
}
if (parts_)
parts_->PostEarlyInitialization();
}
void BrowserMainLoop::PreMainMessageLoopStart() {
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
}
void BrowserMainLoop::MainMessageLoopStart() {
// DO NOT add more code here. Use PreMainMessageLoopStart() above or
// PostMainMessageLoopStart() below.
TRACE_EVENT0("startup", "BrowserMainLoop::MainMessageLoopStart");
// 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();
}
void BrowserMainLoop::PostMainMessageLoopStart() {
{
TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SystemMonitor");
system_monitor_.reset(new base::SystemMonitor);
}
{
TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:PowerMonitor");
std::unique_ptr<base::PowerMonitorSource> power_monitor_source(
new base::PowerMonitorDeviceSource());
power_monitor_.reset(
new base::PowerMonitor(std::move(power_monitor_source)));
}
{
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());
}
{
TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MediaFeatures");
media::InitializeMediaLibrary();
}
{
TRACE_EVENT0("startup",
"BrowserMainLoop::Subsystem:ContentWebUIController");
WebUIControllerFactory::RegisterFactory(
ContentWebUIControllerFactory::GetInstance());
}
{
TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:OnlineStateObserver");
online_state_observer_.reset(new BrowserOnlineStateObserver);
}
{
system_stats_monitor_.reset(
new base::trace_event::TraceEventSystemStatsMonitor(
base::ThreadTaskRunnerHandle::Get()));
}
{
base::SetRecordActionTaskRunner(
BrowserThread::GetTaskRunnerForThread(BrowserThread::UI));
}
if (parameters_.create_discardable_memory) {
discardable_shared_memory_manager_ =
base::MakeUnique<discardable_memory::DiscardableSharedMemoryManager>();
// TODO(boliu): kSingleProcess check is a temporary workaround for
// in-process Android WebView. crbug.com/503724 tracks proper fix.
if (!parsed_command_line_.HasSwitch(switches::kSingleProcess)) {
base::DiscardableMemoryAllocator::SetInstance(
discardable_shared_memory_manager_.get());
}
}
if (parts_)
parts_->PostMainMessageLoopStart();
// Start startup tracing through TracingController's interface. TraceLog has
// been enabled in content_main_runner where threads are not available. Now We
// need to start tracing for all other tracing agents, which require threads.
if (parsed_command_line_.HasSwitch(switches::kTraceStartup)) {
base::trace_event::TraceConfig trace_config(
parsed_command_line_.GetSwitchValueASCII(switches::kTraceStartup),
base::trace_event::RECORD_UNTIL_FULL);
TracingController::GetInstance()->StartTracing(
trace_config,
TracingController::StartTracingDoneCallback());
} else if (parsed_command_line_.HasSwitch(switches::kTraceToConsole)) {
TracingController::GetInstance()->StartTracing(
tracing::GetConfigForTraceToConsole(),
TracingController::StartTracingDoneCallback());
} else if (tracing::TraceConfigFile::GetInstance()->IsEnabled()) {
// This checks kTraceConfigFile switch.
TracingController::GetInstance()->StartTracing(
tracing::TraceConfigFile::GetInstance()->GetTraceConfig(),
TracingController::StartTracingDoneCallback());
}
// Start tracing to a file for certain duration if needed. Only do this after
// starting the main message loop to avoid calling
// MessagePumpForUI::ScheduleWork() before MessagePumpForUI::Start() as it
// will crash the browser.
if (is_tracing_startup_for_duration_) {
TRACE_EVENT0("startup", "BrowserMainLoop::InitStartupTracingForDuration");
InitStartupTracingForDuration(parsed_command_line_);
}
#if defined(OS_ANDROID)
{
TRACE_EVENT0("startup",
"BrowserMainLoop::Subsystem:BrowserMediaPlayerManager");
if (UsingInProcessGpu()) {
gpu::ScopedSurfaceRequestConduit::SetInstance(
ScopedSurfaceRequestManager::GetInstance());
}
}
if (!parsed_command_line_.HasSwitch(
switches::kDisableScreenOrientationLock)) {
TRACE_EVENT0("startup",
"BrowserMainLoop::Subsystem:ScreenOrientationProvider");
screen_orientation_delegate_.reset(
new ScreenOrientationDelegateAndroid());
}
#endif
#if defined(OS_MACOSX)
if (BootstrapSandboxManager::ShouldEnable()) {
TRACE_EVENT0("startup",
"BrowserMainLoop::Subsystem:BootstrapSandbox");
CHECK(BootstrapSandboxManager::GetInstance());
}
#endif
if (parsed_command_line_.HasSwitch(
switches::kEnableAggressiveDOMStorageFlushing)) {
TRACE_EVENT0("startup",
"BrowserMainLoop::Subsystem:EnableAggressiveCommitDelay");
DOMStorageArea::EnableAggressiveCommitDelay();
LevelDBWrapperImpl::EnableAggressiveCommitDelay();
}
if (parsed_command_line_.HasSwitch(switches::kIsolateOrigins)) {
ChildProcessSecurityPolicyImpl* policy =
ChildProcessSecurityPolicyImpl::GetInstance();
policy->AddIsolatedOriginsFromCommandLine(
parsed_command_line_.GetSwitchValueASCII(switches::kIsolateOrigins));
}
// Enable memory-infra dump providers.
InitSkiaEventTracer();
base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
viz::ServerSharedBitmapManager::current(),
"viz::ServerSharedBitmapManager", nullptr);
base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
skia::SkiaMemoryDumpProvider::GetInstance(), "Skia", nullptr);
base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
sql::SqlMemoryDumpProvider::GetInstance(), "Sql", nullptr);
}
int BrowserMainLoop::PreCreateThreads() {
// SequencedWorkerPool shouldn't be enabled yet. It should be enabled below by
// either |parts_|->PreCreateThreads() or
// base::SequencedWorkerPool::EnableForProcess().
// TODO(fdoray): Uncomment this line.
// DCHECK(!base::SequencedWorkerPool::IsEnabled());
if (parts_) {
TRACE_EVENT0("startup",
"BrowserMainLoop::CreateThreads:PreCreateThreads");
result_code_ = parts_->PreCreateThreads();
}
// Enable SequencedWorkerPool if |parts_|->PreCreateThreads() hasn't enabled
// it.
// TODO(fdoray): Remove this once the SequencedWorkerPool to TaskScheduler
// redirection experiment concludes https://crbug.com/622400.
if (!base::SequencedWorkerPool::IsEnabled())
base::SequencedWorkerPool::EnableForProcess();
const base::CommandLine* command_line =
base::CommandLine::ForCurrentProcess();
// Note that we do not initialize a new FeatureList when calling this for
// the second time.
base::FeatureList::InitializeInstance(
command_line->GetSwitchValueASCII(switches::kEnableFeatures),
command_line->GetSwitchValueASCII(switches::kDisableFeatures));
InitializeMemoryManagementComponent();
#if defined(OS_MACOSX)
if (base::CommandLine::InitializedForCurrentProcess() &&
base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kEnableHeapProfiling)) {
base::allocator::PeriodicallyShimNewMallocZones();
}
#endif
#if BUILDFLAG(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 BUILDFLAG(ENABLE_MOJO_CDM) && BUILDFLAG(ENABLE_LIBRARY_CDMS)
// Prior to any processing happening on the IO thread, we create the
// CDM service as it is predominantly used from the IO thread. This must
// be called on the main thread since it involves file path checks.
CdmRegistry::GetInstance()->Init();
#endif
#if defined(OS_MACOSX)
// The WindowResizeHelper allows the UI thread to wait on specific renderer
// and GPU messages from the IO thread. Initializing it before the IO thread
// starts ensures the affected IO thread messages always have somewhere to go.
ui::WindowResizeHelperMac::Get()->Init(base::ThreadTaskRunnerHandle::Get());
#endif
GpuDataManagerImpl* gpu_data_manager = GpuDataManagerImpl::GetInstance();
#if defined(USE_X11) && !defined(OS_CHROMEOS)
// GpuDataManagerVisualProxy() just adds itself as an observer of
// |gpu_data_manager|, which is safe to do before Initialize().
gpu_data_manager_visual_proxy_.reset(
new internal::GpuDataManagerVisualProxy(gpu_data_manager));
#endif
// 1) Need to initialize in-process GpuDataManager before creating threads.
// It's unsafe to append the gpu command line switches to the global
// CommandLine::ForCurrentProcess object after threads are created.
// 2) Must be after parts_->PreCreateThreads to pick up chrome://flags.
gpu_data_manager->Initialize();
#if !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
// Initialize origins that are whitelisted for process isolation. Must be
// done after base::FeatureList is initialized, but before any navigations
// can happen.
std::vector<url::Origin> origins =
GetContentClient()->browser()->GetOriginsRequiringDedicatedProcess();
ChildProcessSecurityPolicyImpl* policy =
ChildProcessSecurityPolicyImpl::GetInstance();
for (auto origin : origins)
policy->AddIsolatedOrigin(origin);
EVP_set_buggy_rsa_parser(
base::FeatureList::IsEnabled(features::kBuggyRSAParser));
return result_code_;
}
void BrowserMainLoop::PreShutdown() {
parts_->PreShutdown();
ui::Clipboard::OnPreShutdownForCurrentThread();
}
void BrowserMainLoop::CreateStartupTasks() {
TRACE_EVENT0("startup", "BrowserMainLoop::CreateStartupTasks");
DCHECK(!startup_task_runner_);
#if defined(OS_ANDROID)
startup_task_runner_ = base::MakeUnique<StartupTaskRunner>(
base::Bind(&BrowserStartupComplete), base::ThreadTaskRunnerHandle::Get());
#else
startup_task_runner_ = base::MakeUnique<StartupTaskRunner>(
base::Callback<void(int)>(), base::ThreadTaskRunnerHandle::Get());
#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 (parameters_.ui_task) {
// Running inside browser tests, which relies on synchronous start.
startup_task_runner_->RunAllTasksNow();
} else {
startup_task_runner_->StartRunningTasksAsync();
}
#else
startup_task_runner_->RunAllTasksNow();
#endif
}
scoped_refptr<base::SingleThreadTaskRunner>
BrowserMainLoop::GetResizeTaskRunner() {
#if defined(OS_MACOSX)
scoped_refptr<base::SingleThreadTaskRunner> task_runner =
ui::WindowResizeHelperMac::Get()->task_runner();
// In tests, WindowResizeHelperMac task runner might not be initialized.
return task_runner ? task_runner : base::ThreadTaskRunnerHandle::Get();
#else
return base::ThreadTaskRunnerHandle::Get();
#endif
}
gpu::GpuChannelEstablishFactory*
BrowserMainLoop::gpu_channel_establish_factory() const {
return BrowserGpuChannelHostFactory::instance();
}
#if defined(OS_ANDROID)
void BrowserMainLoop::SynchronouslyFlushStartupTasks() {
startup_task_runner_->RunAllTasksNow();
}
#endif // OS_ANDROID
int BrowserMainLoop::CreateThreads() {
TRACE_EVENT0("startup,rail", "BrowserMainLoop::CreateThreads");
{
auto task_scheduler_init_params =
GetContentClient()->browser()->GetTaskSchedulerInitParams();
if (!task_scheduler_init_params)
task_scheduler_init_params = GetDefaultTaskSchedulerInitParams();
DCHECK(task_scheduler_init_params);
// If a renderer lives in the browser process, adjust the number of threads
// in the foreground pool.
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kSingleProcess)) {
const base::SchedulerWorkerPoolParams&
current_foreground_worker_pool_params(
task_scheduler_init_params->foreground_worker_pool_params);
task_scheduler_init_params->foreground_worker_pool_params =
base::SchedulerWorkerPoolParams(
std::max(GetMinThreadsInRendererTaskSchedulerForegroundPool(),
current_foreground_worker_pool_params.max_threads()),
current_foreground_worker_pool_params.suggested_reclaim_time(),
current_foreground_worker_pool_params.backward_compatibility());
}
base::TaskScheduler::GetInstance()->Start(
*task_scheduler_init_params.get());
}
base::SequencedWorkerPool::EnableWithRedirectionToTaskSchedulerForProcess();
base::Thread::Options io_message_loop_options;
io_message_loop_options.message_loop_type = base::MessageLoop::TYPE_IO;
// 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;