// Copyright (c) 2011 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. // Represents the browser side of the browser <--> renderer communication // channel. There will be one RenderProcessHost per renderer process. #include "content/browser/renderer_host/render_process_host_impl.h" #include #include #include #if defined(OS_POSIX) #include // for pair<> #endif #include "base/base_switches.h" #include "base/bind.h" #include "base/bind_helpers.h" #include "base/callback.h" #include "base/command_line.h" #include "base/lazy_instance.h" #include "base/logging.h" #include "base/metrics/field_trial.h" #include "base/metrics/histogram.h" #include "base/path_service.h" #include "base/platform_file.h" #include "base/process_util.h" #include "base/rand_util.h" #include "base/stl_util.h" #include "base/string_util.h" #include "base/sys_info.h" #include "base/threading/thread.h" #include "base/threading/thread_restrictions.h" #include "base/tracked_objects.h" #include "content/browser/appcache/appcache_dispatcher_host.h" #include "content/browser/browser_child_process_host.h" #include "content/browser/browser_context.h" #include "content/browser/browser_main.h" #include "content/browser/child_process_security_policy.h" #include "content/browser/device_orientation/message_filter.h" #include "content/browser/download/mhtml_generation_manager.h" #include "content/browser/file_system/file_system_dispatcher_host.h" #include "content/browser/geolocation/geolocation_dispatcher_host.h" #include "content/browser/gpu/gpu_data_manager.h" #include "content/browser/gpu/gpu_process_host.h" #include "content/browser/in_process_webkit/dom_storage_message_filter.h" #include "content/browser/in_process_webkit/indexed_db_dispatcher_host.h" #include "content/browser/mime_registry_message_filter.h" #include "content/browser/plugin_service.h" #include "content/browser/profiler_message_filter.h" #include "content/browser/renderer_host/blob_message_filter.h" #include "content/browser/renderer_host/clipboard_message_filter.h" #include "content/browser/renderer_host/database_message_filter.h" #include "content/browser/renderer_host/file_utilities_message_filter.h" #include "content/browser/renderer_host/gamepad_browser_message_filter.h" #include "content/browser/renderer_host/gpu_message_filter.h" #include "content/browser/renderer_host/media/audio_input_renderer_host.h" #include "content/browser/renderer_host/media/audio_renderer_host.h" #include "content/browser/renderer_host/media/media_stream_dispatcher_host.h" #include "content/browser/renderer_host/media/video_capture_host.h" #include "content/browser/renderer_host/p2p/socket_dispatcher_host.h" #include "content/browser/renderer_host/pepper_file_message_filter.h" #include "content/browser/renderer_host/pepper_message_filter.h" #include "content/browser/renderer_host/quota_dispatcher_host.h" #include "content/browser/renderer_host/render_message_filter.h" #include "content/browser/renderer_host/render_view_host.h" #include "content/browser/renderer_host/render_view_host_delegate.h" #include "content/browser/renderer_host/render_widget_helper.h" #include "content/browser/renderer_host/render_widget_host.h" #include "content/browser/renderer_host/resource_message_filter.h" #include "content/browser/renderer_host/socket_stream_dispatcher_host.h" #include "content/browser/renderer_host/text_input_client_message_filter.h" #include "content/browser/resolve_proxy_msg_helper.h" #include "content/browser/speech/speech_input_dispatcher_host.h" #include "content/browser/trace_message_filter.h" #include "content/browser/user_metrics.h" #include "content/browser/webui/web_ui_factory.h" #include "content/browser/worker_host/worker_message_filter.h" #include "content/common/child_process_host_impl.h" #include "content/common/child_process_messages.h" #include "content/common/gpu/gpu_messages.h" #include "content/public/browser/notification_service.h" #include "content/common/resource_messages.h" #include "content/common/view_messages.h" #include "content/public/browser/content_browser_client.h" #include "content/public/common/content_constants.h" #include "content/public/common/content_switches.h" #include "content/public/common/process_type.h" #include "content/public/common/result_codes.h" #include "content/renderer/render_process_impl.h" #include "content/renderer/render_thread_impl.h" #include "ipc/ipc_logging.h" #include "ipc/ipc_platform_file.h" #include "ipc/ipc_switches.h" #include "media/base/media_switches.h" #include "net/url_request/url_request_context_getter.h" #include "ui/base/ui_base_switches.h" #include "ui/gfx/gl/gl_switches.h" #include "webkit/fileapi/file_system_path_manager.h" #include "webkit/fileapi/sandbox_mount_point_provider.h" #include "webkit/glue/resource_type.h" #include "webkit/plugins/plugin_switches.h" #if defined(OS_WIN) #include #include "base/synchronization/waitable_event.h" #include "content/common/font_cache_dispatcher_win.h" #endif #include "third_party/skia/include/core/SkBitmap.h" using content::BrowserThread; using content::ChildProcessHost; using content::ChildProcessHostImpl; // This class creates the IO thread for the renderer when running in // single-process mode. It's not used in multi-process mode. class RendererMainThread : public base::Thread { public: explicit RendererMainThread(const std::string& channel_id) : base::Thread("Chrome_InProcRendererThread"), channel_id_(channel_id), render_process_(NULL) { } ~RendererMainThread() { Stop(); } protected: virtual void Init() { #if defined(OS_WIN) CoInitialize(NULL); #endif render_process_ = new RenderProcessImpl(); render_process_->set_main_thread(new RenderThreadImpl(channel_id_)); } virtual void CleanUp() { delete render_process_; #if defined(OS_WIN) CoUninitialize(); #endif // It's a little lame to manually set this flag. But the single process // RendererThread will receive the WM_QUIT. We don't need to assert on // this thread, so just force the flag manually. // If we want to avoid this, we could create the InProcRendererThread // directly with _beginthreadex() rather than using the Thread class. // We used to set this flag in the Init function above. However there // other threads like WebThread which are created by this thread // which resets this flag. Please see Thread::StartWithOptions. Setting // this flag to true in Cleanup works around these problems. base::Thread::SetThreadWasQuitProperly(true); } private: std::string channel_id_; // Deleted in CleanUp() on the renderer thread, so don't use a smart pointer. RenderProcess* render_process_; }; namespace { // Helper class that we pass to ResourceMessageFilter so that it can find the // right net::URLRequestContext for a request. class RendererURLRequestContextSelector : public ResourceMessageFilter::URLRequestContextSelector { public: RendererURLRequestContextSelector(content::BrowserContext* browser_context, int render_child_id) : request_context_(browser_context->GetRequestContextForRenderProcess( render_child_id)), media_request_context_(browser_context->GetRequestContextForMedia()) { } virtual net::URLRequestContext* GetRequestContext( ResourceType::Type resource_type) { net::URLRequestContextGetter* request_context = request_context_; // If the request has resource type of ResourceType::MEDIA, we use a request // context specific to media for handling it because these resources have // specific needs for caching. if (resource_type == ResourceType::MEDIA) request_context = media_request_context_; return request_context->GetURLRequestContext(); } private: virtual ~RendererURLRequestContextSelector() {} scoped_refptr request_context_; scoped_refptr media_request_context_; }; size_t max_renderer_count_override = 0; size_t GetMaxRendererProcessCount() { if (max_renderer_count_override) return max_renderer_count_override; // Defines the maximum number of renderer processes according to the // amount of installed memory as reported by the OS. The table // values are calculated by assuming that you want the renderers to // use half of the installed ram and assuming that each tab uses // ~40MB, however the curve is not linear but piecewise linear with // interleaved slopes of 3 and 2. // If you modify this table you need to adjust browser\browser_uitest.cc // to match the expected number of processes. static const size_t kMaxRenderersByRamTier[] = { 3, // less than 256MB 6, // 256MB 9, // 512MB 12, // 768MB 14, // 1024MB 18, // 1280MB 20, // 1536MB 22, // 1792MB 24, // 2048MB 26, // 2304MB 29, // 2560MB 32, // 2816MB 35, // 3072MB 38, // 3328MB 40 // 3584MB }; static size_t max_count = 0; if (!max_count) { size_t memory_tier = base::SysInfo::AmountOfPhysicalMemoryMB() / 256; if (memory_tier >= arraysize(kMaxRenderersByRamTier)) max_count = content::kMaxRendererProcessCount; else max_count = kMaxRenderersByRamTier[memory_tier]; } return max_count; } // Returns true if the given host is suitable for launching a new view // associated with the given browser context. static bool IsSuitableHost(content::RenderProcessHost* host, content::BrowserContext* browser_context, const GURL& site_url) { if (host->GetBrowserContext() != browser_context) return false; if (ChildProcessSecurityPolicy::GetInstance()->HasWebUIBindings( host->GetID()) != content::WebUIFactory::Get()->HasWebUIScheme(site_url)) return false; return content::GetContentClient()->browser()->IsSuitableHost(host, site_url); } // the global list of all renderer processes base::LazyInstance< IDMap, base::LeakyLazyInstanceTraits > > g_all_hosts = LAZY_INSTANCE_INITIALIZER; } // namespace // static bool g_run_renderer_in_process_ = false; // static void content::RenderProcessHost::SetMaxRendererProcessCountForTest( size_t count) { max_renderer_count_override = count; } RenderProcessHostImpl::RenderProcessHostImpl( content::BrowserContext* browser_context) : max_page_id_(-1), fast_shutdown_started_(false), deleting_soon_(false), pending_views_(0), visible_widgets_(0), backgrounded_(true), ALLOW_THIS_IN_INITIALIZER_LIST(cached_dibs_cleaner_( FROM_HERE, base::TimeDelta::FromSeconds(5), this, &RenderProcessHostImpl::ClearTransportDIBCache)), accessibility_enabled_(false), is_initialized_(false), id_(ChildProcessHostImpl::GenerateChildProcessUniqueId()), browser_context_(browser_context), sudden_termination_allowed_(true), ignore_input_events_(false) { widget_helper_ = new RenderWidgetHelper(); ChildProcessSecurityPolicy::GetInstance()->Add(GetID()); // Grant most file permissions to this renderer. // PLATFORM_FILE_TEMPORARY, PLATFORM_FILE_HIDDEN and // PLATFORM_FILE_DELETE_ON_CLOSE are not granted, because no existing API // requests them. // This is for the filesystem sandbox. ChildProcessSecurityPolicy::GetInstance()->GrantPermissionsForFile( GetID(), browser_context->GetPath().Append( fileapi::SandboxMountPointProvider::kNewFileSystemDirectory), base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_CREATE | base::PLATFORM_FILE_OPEN_ALWAYS | base::PLATFORM_FILE_CREATE_ALWAYS | base::PLATFORM_FILE_OPEN_TRUNCATED | base::PLATFORM_FILE_READ | base::PLATFORM_FILE_WRITE | base::PLATFORM_FILE_EXCLUSIVE_READ | base::PLATFORM_FILE_EXCLUSIVE_WRITE | base::PLATFORM_FILE_ASYNC | base::PLATFORM_FILE_WRITE_ATTRIBUTES | base::PLATFORM_FILE_ENUMERATE); // This is so that we can read and move stuff out of the old filesystem // sandbox. ChildProcessSecurityPolicy::GetInstance()->GrantPermissionsForFile( GetID(), browser_context->GetPath().Append( fileapi::SandboxMountPointProvider::kOldFileSystemDirectory), base::PLATFORM_FILE_READ | base::PLATFORM_FILE_WRITE | base::PLATFORM_FILE_WRITE_ATTRIBUTES | base::PLATFORM_FILE_ENUMERATE); // This is so that we can rename the old sandbox out of the way so that we // know we've taken care of it. ChildProcessSecurityPolicy::GetInstance()->GrantPermissionsForFile( GetID(), browser_context->GetPath().Append( fileapi::SandboxMountPointProvider::kRenamedOldFileSystemDirectory), base::PLATFORM_FILE_CREATE | base::PLATFORM_FILE_CREATE_ALWAYS | base::PLATFORM_FILE_WRITE); CHECK(!content::ExitedMainMessageLoop()); RegisterHost(GetID(), this); g_all_hosts.Get().set_check_on_null_data(true); // Initialize |child_process_activity_time_| to a reasonable value. mark_child_process_activity_time(); // Note: When we create the RenderProcessHostImpl, it's technically // backgrounded, because it has no visible listeners. But the process // doesn't actually exist yet, so we'll Background it later, after // creation. } RenderProcessHostImpl::~RenderProcessHostImpl() { ChildProcessSecurityPolicy::GetInstance()->Remove(GetID()); // We may have some unsent messages at this point, but that's OK. channel_.reset(); while (!queued_messages_.empty()) { delete queued_messages_.front(); queued_messages_.pop(); } ClearTransportDIBCache(); UnregisterHost(GetID()); } void RenderProcessHostImpl::EnableSendQueue() { is_initialized_ = false; } bool RenderProcessHostImpl::Init(bool is_accessibility_enabled) { // calling Init() more than once does nothing, this makes it more convenient // for the view host which may not be sure in some cases if (channel_.get()) return true; accessibility_enabled_ = is_accessibility_enabled; CommandLine::StringType renderer_prefix; #if defined(OS_POSIX) // A command prefix is something prepended to the command line of the spawned // process. It is supported only on POSIX systems. const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess(); renderer_prefix = browser_command_line.GetSwitchValueNative(switches::kRendererCmdPrefix); #endif // defined(OS_POSIX) #if defined(OS_LINUX) int flags = renderer_prefix.empty() ? ChildProcessHost::CHILD_ALLOW_SELF : ChildProcessHost::CHILD_NORMAL; #else int flags = ChildProcessHost::CHILD_NORMAL; #endif // Find the renderer before creating the channel so if this fails early we // return without creating the channel. FilePath renderer_path = ChildProcessHost::GetChildPath(flags); if (renderer_path.empty()) return false; // Setup the IPC channel. const std::string channel_id = ChildProcessHostImpl::GenerateRandomChannelID(this); channel_.reset(new IPC::ChannelProxy( channel_id, IPC::Channel::MODE_SERVER, this, BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO))); // Call the embedder first so that their IPC filters have priority. content::GetContentClient()->browser()->RenderProcessHostCreated( this); CreateMessageFilters(); if (run_renderer_in_process()) { // Crank up a thread and run the initialization there. With the way that // messages flow between the browser and renderer, this thread is required // to prevent a deadlock in single-process mode. Since the primordial // thread in the renderer process runs the WebKit code and can sometimes // make blocking calls to the UI thread (i.e. this thread), they need to run // on separate threads. in_process_renderer_.reset(new RendererMainThread(channel_id)); base::Thread::Options options; #if !defined(TOOLKIT_USES_GTK) // In-process plugins require this to be a UI message loop. options.message_loop_type = MessageLoop::TYPE_UI; #else // We can't have multiple UI loops on GTK, so we don't support // in-process plugins. options.message_loop_type = MessageLoop::TYPE_DEFAULT; #endif in_process_renderer_->StartWithOptions(options); OnProcessLaunched(); // Fake a callback that the process is ready. } else { // Build command line for renderer. We call AppendRendererCommandLine() // first so the process type argument will appear first. CommandLine* cmd_line = new CommandLine(renderer_path); if (!renderer_prefix.empty()) cmd_line->PrependWrapper(renderer_prefix); AppendRendererCommandLine(cmd_line); cmd_line->AppendSwitchASCII(switches::kProcessChannelID, channel_id); // Spawn the child process asynchronously to avoid blocking the UI thread. // As long as there's no renderer prefix, we can use the zygote process // at this stage. child_process_launcher_.reset(new ChildProcessLauncher( #if defined(OS_WIN) FilePath(), #elif defined(OS_POSIX) renderer_prefix.empty(), base::environment_vector(), channel_->TakeClientFileDescriptor(), #endif cmd_line, this)); fast_shutdown_started_ = false; } is_initialized_ = true; return true; } void RenderProcessHostImpl::CreateMessageFilters() { scoped_refptr render_message_filter( new RenderMessageFilter( GetID(), PluginService::GetInstance(), GetBrowserContext(), GetBrowserContext()->GetRequestContextForRenderProcess(GetID()), widget_helper_)); channel_->AddFilter(render_message_filter); ResourceMessageFilter* resource_message_filter = new ResourceMessageFilter( GetID(), content::PROCESS_TYPE_RENDERER, &GetBrowserContext()->GetResourceContext(), new RendererURLRequestContextSelector(GetBrowserContext(), GetID()), content::GetContentClient()->browser()->GetResourceDispatcherHost()); channel_->AddFilter(resource_message_filter); channel_->AddFilter(new AudioInputRendererHost( &GetBrowserContext()->GetResourceContext())); channel_->AddFilter( new AudioRendererHost(&GetBrowserContext()->GetResourceContext())); channel_->AddFilter( new VideoCaptureHost(&GetBrowserContext()->GetResourceContext())); channel_->AddFilter( new AppCacheDispatcherHost(GetBrowserContext()->GetAppCacheService(), GetID())); channel_->AddFilter(new ClipboardMessageFilter()); channel_->AddFilter( new DOMStorageMessageFilter(GetID(), GetBrowserContext()->GetWebKitContext())); channel_->AddFilter( new IndexedDBDispatcherHost(GetID(), GetBrowserContext()->GetWebKitContext())); channel_->AddFilter( GeolocationDispatcherHost::New( GetID(), GetBrowserContext()->GetGeolocationPermissionContext())); channel_->AddFilter(new GpuMessageFilter(GetID(), widget_helper_.get())); channel_->AddFilter(new media_stream::MediaStreamDispatcherHost( &GetBrowserContext()->GetResourceContext(), GetID())); channel_->AddFilter(new PepperFileMessageFilter(GetID(), GetBrowserContext())); channel_->AddFilter( new PepperMessageFilter(&GetBrowserContext()->GetResourceContext())); channel_->AddFilter(new speech_input::SpeechInputDispatcherHost( GetID(), GetBrowserContext()->GetRequestContext(), GetBrowserContext()->GetSpeechInputPreferences())); channel_->AddFilter( new FileSystemDispatcherHost( GetBrowserContext()->GetRequestContext(), GetBrowserContext()->GetFileSystemContext())); channel_->AddFilter(new device_orientation::MessageFilter()); channel_->AddFilter( new BlobMessageFilter(GetID(), GetBrowserContext()->GetBlobStorageContext())); channel_->AddFilter(new FileUtilitiesMessageFilter(GetID())); channel_->AddFilter(new MimeRegistryMessageFilter()); channel_->AddFilter(new DatabaseMessageFilter( GetBrowserContext()->GetDatabaseTracker())); #if defined(OS_MACOSX) channel_->AddFilter(new TextInputClientMessageFilter(GetID())); #elif defined(OS_WIN) channel_->AddFilter(new FontCacheDispatcher()); #endif SocketStreamDispatcherHost* socket_stream_dispatcher_host = new SocketStreamDispatcherHost( new RendererURLRequestContextSelector(GetBrowserContext(), GetID()), &GetBrowserContext()->GetResourceContext()); channel_->AddFilter(socket_stream_dispatcher_host); channel_->AddFilter( new WorkerMessageFilter( GetID(), &GetBrowserContext()->GetResourceContext(), content::GetContentClient()->browser()->GetResourceDispatcherHost(), base::Bind(&RenderWidgetHelper::GetNextRoutingID, base::Unretained(widget_helper_.get())))); #if defined(ENABLE_P2P_APIS) channel_->AddFilter(new content::P2PSocketDispatcherHost( &GetBrowserContext()->GetResourceContext())); #endif channel_->AddFilter(new TraceMessageFilter()); channel_->AddFilter(new ResolveProxyMsgHelper( GetBrowserContext()->GetRequestContextForRenderProcess(GetID()))); channel_->AddFilter(new QuotaDispatcherHost( GetID(), GetBrowserContext()->GetQuotaManager(), content::GetContentClient()->browser()->CreateQuotaPermissionContext())); channel_->AddFilter(new content::GamepadBrowserMessageFilter(this)); channel_->AddFilter(new ProfilerMessageFilter()); } int RenderProcessHostImpl::GetNextRoutingID() { return widget_helper_->GetNextRoutingID(); } void RenderProcessHostImpl::UpdateAndSendMaxPageID(int32 page_id) { if (page_id > max_page_id_) Send(new ViewMsg_SetNextPageID(page_id + 1)); UpdateMaxPageID(page_id); } void RenderProcessHostImpl::CancelResourceRequests(int render_widget_id) { widget_helper_->CancelResourceRequests(render_widget_id); } void RenderProcessHostImpl::CrossSiteSwapOutACK( const ViewMsg_SwapOut_Params& params) { widget_helper_->CrossSiteSwapOutACK(params); } bool RenderProcessHostImpl::WaitForUpdateMsg( int render_widget_id, const base::TimeDelta& max_delay, IPC::Message* msg) { // The post task to this thread with the process id could be in queue, and we // don't want to dispatch a message before then since it will need the handle. if (child_process_launcher_.get() && child_process_launcher_->IsStarting()) return false; return widget_helper_->WaitForUpdateMsg(render_widget_id, max_delay, msg); } void RenderProcessHostImpl::ReceivedBadMessage() { if (run_renderer_in_process()) { // In single process mode it is better if we don't suicide but just // crash. CHECK(false); } NOTREACHED(); base::KillProcess(GetHandle(), content::RESULT_CODE_KILLED_BAD_MESSAGE, false); } void RenderProcessHostImpl::WidgetRestored() { // Verify we were properly backgrounded. DCHECK_EQ(backgrounded_, (visible_widgets_ == 0)); visible_widgets_++; SetBackgrounded(false); } void RenderProcessHostImpl::WidgetHidden() { // On startup, the browser will call Hide if (backgrounded_) return; DCHECK_EQ(backgrounded_, (visible_widgets_ == 0)); visible_widgets_--; DCHECK_GE(visible_widgets_, 0); if (visible_widgets_ == 0) { DCHECK(!backgrounded_); SetBackgrounded(true); } } int RenderProcessHostImpl::VisibleWidgetCount() const { return visible_widgets_; } void RenderProcessHostImpl::AppendRendererCommandLine( CommandLine* command_line) const { // Pass the process type first, so it shows first in process listings. command_line->AppendSwitchASCII(switches::kProcessType, switches::kRendererProcess); if (accessibility_enabled_) command_line->AppendSwitch(switches::kEnableAccessibility); // Now send any options from our own command line we want to propagate. const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess(); PropagateBrowserCommandLineToRenderer(browser_command_line, command_line); // Pass on the browser locale. const std::string locale = content::GetContentClient()->browser()->GetApplicationLocale(); command_line->AppendSwitchASCII(switches::kLang, locale); // If we run base::FieldTrials, we want to pass to their state to the // renderer so that it can act in accordance with each state, or record // histograms relating to the base::FieldTrial states. std::string field_trial_states; base::FieldTrialList::StatesToString(&field_trial_states); if (!field_trial_states.empty()) { command_line->AppendSwitchASCII(switches::kForceFieldTestNameAndValue, field_trial_states); } content::GetContentClient()->browser()->AppendExtraCommandLineSwitches( command_line, GetID()); // Appending disable-gpu-feature switches due to software rendering list. GpuDataManager* gpu_data_manager = GpuDataManager::GetInstance(); DCHECK(gpu_data_manager); gpu_data_manager->AppendRendererCommandLine(command_line); } void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer( const CommandLine& browser_cmd, CommandLine* renderer_cmd) const { // Propagate the following switches to the renderer command line (along // with any associated values) if present in the browser command line. static const char* const kSwitchNames[] = { // We propagate the Chrome Frame command line here as well in case the // renderer is not run in the sandbox. switches::kAuditAllHandles, switches::kAuditHandles, switches::kChromeFrame, switches::kDisable3DAPIs, switches::kDisableAcceleratedCompositing, switches::kDisableApplicationCache, switches::kDisableAudio, switches::kDisableBreakpad, #if defined(OS_MACOSX) switches::kDisableCompositedCoreAnimationPlugins, #endif switches::kDisableDataTransferItems, switches::kDisableDatabases, switches::kDisableDesktopNotifications, switches::kDisableDeviceOrientation, switches::kDisableFileSystem, switches::kDisableGeolocation, switches::kDisableGLMultisampling, switches::kDisableGLSLTranslator, switches::kDisableGpuDriverBugWorkarounds, switches::kDisableGpuVsync, switches::kDisableJavaScriptI18NAPI, switches::kDisableLocalStorage, switches::kDisableLogging, switches::kDisableSeccompSandbox, switches::kDisableSessionStorage, switches::kDisableSharedWorkers, switches::kDisableSpeechInput, switches::kDisableWebAudio, switches::kDisableWebSockets, switches::kEnableAccessibilityLogging, switches::kEnableDCHECK, switches::kEnableGamepad, switches::kEnableGPUServiceLogging, switches::kEnableGPUClientLogging, switches::kEnableIndexedDBForWorkers, switches::kEnableLogging, switches::kEnableMediaSource, switches::kEnableMediaStream, switches::kEnableStrictSiteIsolation, switches::kDisableFullScreen, switches::kEnablePepperTesting, switches::kEnablePointerLock, #if defined(OS_MACOSX) // Allow this to be set when invoking the browser and relayed along. switches::kEnableSandboxLogging, #endif switches::kEnableSeccompSandbox, switches::kEnableStatsTable, switches::kEnableThreadedCompositing, switches::kEnableVideoFullscreen, switches::kEnableVideoTrack, switches::kFullMemoryCrashReport, #if !defined (GOOGLE_CHROME_BUILD) // These are unsupported and not fully tested modes, so don't enable them // for official Google Chrome builds. switches::kInProcessPlugins, #endif // GOOGLE_CHROME_BUILD switches::kInProcessWebGL, switches::kJavaScriptFlags, switches::kLoggingLevel, switches::kHighLatencyAudio, switches::kNoJsRandomness, switches::kNoReferrers, switches::kNoSandbox, switches::kPlaybackMode, switches::kPpapiOutOfProcess, switches::kRecordMode, switches::kRegisterPepperPlugins, switches::kRendererAssertTest, #if !defined(OFFICIAL_BUILD) switches::kRendererCheckFalseTest, #endif // !defined(OFFICIAL_BUILD) switches::kRendererCrashTest, switches::kRendererStartupDialog, switches::kShowPaintRects, switches::kSimpleDataSource, switches::kTestSandbox, switches::kTraceStartup, // This flag needs to be propagated to the renderer process for // --in-process-webgl. switches::kUseGL, switches::kUserAgent, switches::kV, switches::kVideoThreads, switches::kVModule, switches::kWebCoreLogChannels, }; renderer_cmd->CopySwitchesFrom(browser_cmd, kSwitchNames, arraysize(kSwitchNames)); // Disable databases in incognito mode. if (GetBrowserContext()->IsOffTheRecord() && !browser_cmd.HasSwitch(switches::kDisableDatabases)) { renderer_cmd->AppendSwitch(switches::kDisableDatabases); } } base::ProcessHandle RenderProcessHostImpl::GetHandle() { // child_process_launcher_ is null either because we're in single process // mode, we have done fast termination, or the process has crashed. if (run_renderer_in_process() || !child_process_launcher_.get()) return base::Process::Current().handle(); if (child_process_launcher_->IsStarting()) return base::kNullProcessHandle; return child_process_launcher_->GetHandle(); } bool RenderProcessHostImpl::FastShutdownIfPossible() { if (run_renderer_in_process()) return false; // Single process mode can't do fast shutdown. if (!content::GetContentClient()->browser()->IsFastShutdownPossible()) return false; if (!child_process_launcher_.get() || child_process_launcher_->IsStarting() || !GetHandle()) return false; // Render process hasn't started or is probably crashed. // Test if there's an unload listener. // NOTE: It's possible that an onunload listener may be installed // while we're shutting down, so there's a small race here. Given that // the window is small, it's unlikely that the web page has much // state that will be lost by not calling its unload handlers properly. if (!SuddenTerminationAllowed()) return false; // Store the handle before it gets changed. base::ProcessHandle handle = GetHandle(); ProcessDied(handle, base::TERMINATION_STATUS_NORMAL_TERMINATION, 0, false); fast_shutdown_started_ = true; return true; } void RenderProcessHostImpl::DumpHandles() { #if defined(OS_WIN) Send(new ChildProcessMsg_DumpHandles()); return; #endif NOTIMPLEMENTED(); } // This is a platform specific function for mapping a transport DIB given its id TransportDIB* RenderProcessHostImpl::MapTransportDIB( TransportDIB::Id dib_id) { #if defined(OS_WIN) // On Windows we need to duplicate the handle from the remote process HANDLE section; DuplicateHandle(GetHandle(), dib_id.handle, GetCurrentProcess(), §ion, STANDARD_RIGHTS_REQUIRED | FILE_MAP_READ | FILE_MAP_WRITE, FALSE, 0); return TransportDIB::Map(section); #elif defined(OS_MACOSX) // On OSX, the browser allocates all DIBs and keeps a file descriptor around // for each. return widget_helper_->MapTransportDIB(dib_id); #elif defined(OS_POSIX) return TransportDIB::Map(dib_id.shmkey); #endif // defined(OS_POSIX) } TransportDIB* RenderProcessHostImpl::GetTransportDIB( TransportDIB::Id dib_id) { if (!TransportDIB::is_valid_id(dib_id)) return NULL; const std::map::iterator i = cached_dibs_.find(dib_id); if (i != cached_dibs_.end()) { cached_dibs_cleaner_.Reset(); return i->second; } TransportDIB* dib = MapTransportDIB(dib_id); if (!dib) return NULL; if (cached_dibs_.size() >= MAX_MAPPED_TRANSPORT_DIBS) { // Clean a single entry from the cache std::map::iterator smallest_iterator; size_t smallest_size = std::numeric_limits::max(); for (std::map::iterator i = cached_dibs_.begin(); i != cached_dibs_.end(); ++i) { if (i->second->size() <= smallest_size) { smallest_iterator = i; smallest_size = i->second->size(); } } delete smallest_iterator->second; cached_dibs_.erase(smallest_iterator); } cached_dibs_[dib_id] = dib; cached_dibs_cleaner_.Reset(); return dib; } void RenderProcessHostImpl::ClearTransportDIBCache() { STLDeleteContainerPairSecondPointers( cached_dibs_.begin(), cached_dibs_.end()); cached_dibs_.clear(); } void RenderProcessHostImpl::SetCompositingSurface( int render_widget_id, gfx::PluginWindowHandle compositing_surface) { widget_helper_->SetCompositingSurface(render_widget_id, compositing_surface); } bool RenderProcessHostImpl::Send(IPC::Message* msg) { if (!channel_.get()) { if (!is_initialized_) { queued_messages_.push(msg); return true; } else { delete msg; return false; } } if (child_process_launcher_.get() && child_process_launcher_->IsStarting()) { queued_messages_.push(msg); return true; } return channel_->Send(msg); } bool RenderProcessHostImpl::OnMessageReceived(const IPC::Message& msg) { // If we're about to be deleted, or have initiated the fast shutdown sequence, // we ignore incoming messages. if (deleting_soon_ || fast_shutdown_started_) return false; mark_child_process_activity_time(); if (msg.routing_id() == MSG_ROUTING_CONTROL) { // Dispatch control messages. bool msg_is_ok = true; IPC_BEGIN_MESSAGE_MAP_EX(RenderProcessHostImpl, msg, msg_is_ok) IPC_MESSAGE_HANDLER(ChildProcessHostMsg_ShutdownRequest, OnShutdownRequest) IPC_MESSAGE_HANDLER(ChildProcessHostMsg_DumpHandlesDone, OnDumpHandlesDone) IPC_MESSAGE_HANDLER(ViewHostMsg_SuddenTerminationChanged, SuddenTerminationChanged) IPC_MESSAGE_HANDLER(ViewHostMsg_UserMetricsRecordAction, OnUserMetricsRecordAction) IPC_MESSAGE_HANDLER(ViewHostMsg_RevealFolderInOS, OnRevealFolderInOS) IPC_MESSAGE_HANDLER(ViewHostMsg_SavedPageAsMHTML, OnSavedPageAsMHTML) IPC_MESSAGE_UNHANDLED_ERROR() IPC_END_MESSAGE_MAP_EX() if (!msg_is_ok) { // The message had a handler, but its de-serialization failed. // We consider this a capital crime. Kill the renderer if we have one. LOG(ERROR) << "bad message " << msg.type() << " terminating renderer."; UserMetrics::RecordAction(UserMetricsAction("BadMessageTerminate_BRPH")); ReceivedBadMessage(); } return true; } // Dispatch incoming messages to the appropriate RenderView/WidgetHost. IPC::Channel::Listener* listener = GetListenerByID(msg.routing_id()); if (!listener) { if (msg.is_sync()) { // The listener has gone away, so we must respond or else the caller will // hang waiting for a reply. IPC::Message* reply = IPC::SyncMessage::GenerateReply(&msg); reply->set_reply_error(); Send(reply); } return true; } return listener->OnMessageReceived(msg); } void RenderProcessHostImpl::OnChannelConnected(int32 peer_pid) { #if defined(IPC_MESSAGE_LOG_ENABLED) Send(new ChildProcessMsg_SetIPCLoggingEnabled( IPC::Logging::GetInstance()->Enabled())); #endif bool enable = tracked_objects::ThreadData::tracking_status(); Send(new ChildProcessMsg_SetProfilerStatus(enable)); // Make sure the child checks with us before exiting, so that we do not try // to schedule a new navigation in a swapped out and exiting renderer. Send(new ChildProcessMsg_AskBeforeShutdown()); } void RenderProcessHostImpl::OnChannelError() { if (!channel_.get()) return; // Store the handle before it gets changed. base::ProcessHandle handle = GetHandle(); // child_process_launcher_ can be NULL in single process mode or if fast // termination happened. int exit_code = 0; base::TerminationStatus status = child_process_launcher_.get() ? child_process_launcher_->GetChildTerminationStatus(&exit_code) : base::TERMINATION_STATUS_NORMAL_TERMINATION; #if defined(OS_WIN) if (!run_renderer_in_process()) { if (status == base::TERMINATION_STATUS_STILL_RUNNING) { HANDLE process = child_process_launcher_->GetHandle(); child_process_watcher_.StartWatching( new base::WaitableEvent(process), this); return; } } #endif ProcessDied(handle, status, exit_code, false); } // Called when the renderer process handle has been signaled. void RenderProcessHostImpl::OnWaitableEventSignaled( base::WaitableEvent* waitable_event) { #if defined (OS_WIN) base::ProcessHandle handle = GetHandle(); int exit_code = 0; base::TerminationStatus status = base::GetTerminationStatus(waitable_event->Release(), &exit_code); delete waitable_event; ProcessDied(handle, status, exit_code, true); #endif } content::BrowserContext* RenderProcessHostImpl::GetBrowserContext() const { return browser_context_; } int RenderProcessHostImpl::GetID() const { return id_; } bool RenderProcessHostImpl::HasConnection() const { return channel_.get() != NULL; } IPC::Channel::Listener* RenderProcessHostImpl::GetListenerByID( int routing_id) { return listeners_.Lookup(routing_id); } void RenderProcessHostImpl::SetIgnoreInputEvents(bool ignore_input_events) { ignore_input_events_ = ignore_input_events; } bool RenderProcessHostImpl::IgnoreInputEvents() const { return ignore_input_events_; } void RenderProcessHostImpl::Attach(IPC::Channel::Listener* listener, int routing_id) { listeners_.AddWithID(listener, routing_id); } void RenderProcessHostImpl::Release(int listener_id) { DCHECK(listeners_.Lookup(listener_id) != NULL); listeners_.Remove(listener_id); // Make sure that all associated resource requests are stopped. CancelResourceRequests(listener_id); #if defined(OS_WIN) // Dump the handle table if handle auditing is enabled. const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess(); if (browser_command_line.HasSwitch(switches::kAuditHandles) || browser_command_line.HasSwitch(switches::kAuditAllHandles)) { DumpHandles(); // We wait to close the channels until the child process has finished // dumping handles and sends us ChildProcessHostMsg_DumpHandlesDone. return; } #endif Cleanup(); } void RenderProcessHostImpl::Cleanup() { // When no other owners of this object, we can delete ourselves if (listeners_.IsEmpty()) { content::NotificationService::current()->Notify( content::NOTIFICATION_RENDERER_PROCESS_TERMINATED, content::Source(this), content::NotificationService::NoDetails()); MessageLoop::current()->DeleteSoon(FROM_HERE, this); deleting_soon_ = true; // It's important not to wait for the DeleteTask to delete the channel // proxy. Kill it off now. That way, in case the profile is going away, the // rest of the objects attached to this RenderProcessHost start going // away first, since deleting the channel proxy will post a // OnChannelClosed() to IPC::ChannelProxy::Context on the IO thread. channel_.reset(); // Remove ourself from the list of renderer processes so that we can't be // reused in between now and when the Delete task runs. g_all_hosts.Get().Remove(GetID()); } } void RenderProcessHostImpl::ReportExpectingClose(int32 listener_id) { listeners_expecting_close_.insert(listener_id); } void RenderProcessHostImpl::AddPendingView() { pending_views_++; } void RenderProcessHostImpl::RemovePendingView() { DCHECK(pending_views_); pending_views_--; } void RenderProcessHostImpl::UpdateMaxPageID(int32 page_id) { if (page_id > max_page_id_) max_page_id_ = page_id; } void RenderProcessHostImpl::SetSuddenTerminationAllowed(bool enabled) { sudden_termination_allowed_ = enabled; } bool RenderProcessHostImpl::SuddenTerminationAllowed() const { return sudden_termination_allowed_; } base::TimeDelta RenderProcessHostImpl::GetChildProcessIdleTime() const { return base::TimeTicks::Now() - child_process_activity_time_; } IPC::ChannelProxy* RenderProcessHostImpl::GetChannel() { return channel_.get(); } content::RenderProcessHost::listeners_iterator RenderProcessHostImpl::ListenersIterator() { return listeners_iterator(&listeners_); } bool RenderProcessHostImpl::FastShutdownForPageCount(size_t count) { if (listeners_.size() == count) return FastShutdownIfPossible(); return false; } bool RenderProcessHostImpl::FastShutdownStarted() const { return fast_shutdown_started_; } // static void RenderProcessHostImpl::RegisterHost(int host_id, content::RenderProcessHost* host) { g_all_hosts.Get().AddWithID(host, host_id); } // static void RenderProcessHostImpl::UnregisterHost(int host_id) { if (g_all_hosts.Get().Lookup(host_id)) g_all_hosts.Get().Remove(host_id); } // static bool content::RenderProcessHost::run_renderer_in_process() { return g_run_renderer_in_process_; } void content::RenderProcessHost::set_run_renderer_in_process(bool value) { g_run_renderer_in_process_ = value; } content::RenderProcessHost::iterator content::RenderProcessHost::AllHostsIterator() { DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); return iterator(g_all_hosts.Pointer()); } // static content::RenderProcessHost* content::RenderProcessHost::FromID( int render_process_id) { DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); return g_all_hosts.Get().Lookup(render_process_id); } // static bool content::RenderProcessHost::ShouldTryToUseExistingProcessHost() { size_t renderer_process_count = g_all_hosts.Get().size(); // NOTE: Sometimes it's necessary to create more render processes than // GetMaxRendererProcessCount(), for instance when we want to create // a renderer process for a browser context that has no existing // renderers. This is OK in moderation, since the // GetMaxRendererProcessCount() is conservative. return run_renderer_in_process() || (renderer_process_count >= GetMaxRendererProcessCount()); } // static content::RenderProcessHost* content::RenderProcessHost::GetExistingProcessHost( content::BrowserContext* browser_context, const GURL& site_url) { // First figure out which existing renderers we can use. std::vector suitable_renderers; suitable_renderers.reserve(g_all_hosts.Get().size()); iterator iter(AllHostsIterator()); while (!iter.IsAtEnd()) { if (run_renderer_in_process() || IsSuitableHost( iter.GetCurrentValue(), browser_context, site_url)) suitable_renderers.push_back(iter.GetCurrentValue()); iter.Advance(); } // Now pick a random suitable renderer, if we have any. if (!suitable_renderers.empty()) { int suitable_count = static_cast(suitable_renderers.size()); int random_index = base::RandInt(0, suitable_count - 1); return suitable_renderers[random_index]; } return NULL; } void RenderProcessHostImpl::ProcessDied(base::ProcessHandle handle, base::TerminationStatus status, int exit_code, bool was_alive) { // Our child process has died. If we didn't expect it, it's a crash. // In any case, we need to let everyone know it's gone. // The OnChannelError notification can fire multiple times due to nested sync // calls to a renderer. If we don't have a valid channel here it means we // already handled the error. RendererClosedDetails details(handle, status, exit_code, was_alive); content::NotificationService::current()->Notify( content::NOTIFICATION_RENDERER_PROCESS_CLOSED, content::Source(this), content::Details(&details)); child_process_launcher_.reset(); channel_.reset(); IDMap::iterator iter(&listeners_); while (!iter.IsAtEnd()) { iter.GetCurrentValue()->OnMessageReceived( ViewHostMsg_RenderViewGone(iter.GetCurrentKey(), static_cast(status), exit_code)); iter.Advance(); } ClearTransportDIBCache(); // this object is not deleted at this point and may be reused later. // TODO(darin): clean this up } void RenderProcessHostImpl::OnShutdownRequest() { // Don't shutdown if there are pending RenderViews being swapped back in. if (pending_views_) return; // Notify any tabs that might have swapped out renderers from this process. // They should not attempt to swap them back in. content::NotificationService::current()->Notify( content::NOTIFICATION_RENDERER_PROCESS_CLOSING, content::Source(this), content::NotificationService::NoDetails()); Send(new ChildProcessMsg_Shutdown()); } void RenderProcessHostImpl::SuddenTerminationChanged(bool enabled) { SetSuddenTerminationAllowed(enabled); } void RenderProcessHostImpl::OnDumpHandlesDone() { Cleanup(); } void RenderProcessHostImpl::SetBackgrounded(bool backgrounded) { // Note: we always set the backgrounded_ value. If the process is NULL // (and hence hasn't been created yet), we will set the process priority // later when we create the process. backgrounded_ = backgrounded; if (!child_process_launcher_.get() || child_process_launcher_->IsStarting()) return; #if defined(OS_WIN) // The cbstext.dll loads as a global GetMessage hook in the browser process // and intercepts/unintercepts the kernel32 API SetPriorityClass in a // background thread. If the UI thread invokes this API just when it is // intercepted the stack is messed up on return from the interceptor // which causes random crashes in the browser process. Our hack for now // is to not invoke the SetPriorityClass API if the dll is loaded. if (GetModuleHandle(L"cbstext.dll")) return; #endif // OS_WIN child_process_launcher_->SetProcessBackgrounded(backgrounded); } void RenderProcessHostImpl::OnProcessLaunched() { // No point doing anything, since this object will be destructed soon. We // especially don't want to send the RENDERER_PROCESS_CREATED notification, // since some clients might expect a RENDERER_PROCESS_TERMINATED afterwards to // properly cleanup. if (deleting_soon_) return; if (child_process_launcher_.get()) { if (!child_process_launcher_->GetHandle()) { OnChannelError(); return; } child_process_launcher_->SetProcessBackgrounded(backgrounded_); } if (max_page_id_ != -1) Send(new ViewMsg_SetNextPageID(max_page_id_ + 1)); // NOTE: This needs to be before sending queued messages because // ExtensionService uses this notification to initialize the renderer process // with state that must be there before any JavaScript executes. // // The queued messages contain such things as "navigate". If this notification // was after, we can end up executing JavaScript before the initialization // happens. content::NotificationService::current()->Notify( content::NOTIFICATION_RENDERER_PROCESS_CREATED, content::Source(this), content::NotificationService::NoDetails()); while (!queued_messages_.empty()) { Send(queued_messages_.front()); queued_messages_.pop(); } } void RenderProcessHostImpl::OnUserMetricsRecordAction( const std::string& action) { UserMetrics::RecordComputedAction(action); } void RenderProcessHostImpl::OnRevealFolderInOS(const FilePath& path) { // Only honor the request if appropriate persmissions are granted. if (ChildProcessSecurityPolicy::GetInstance()->CanReadFile(GetID(), path)) content::GetContentClient()->browser()->OpenItem(path); } void RenderProcessHostImpl::OnSavedPageAsMHTML(int job_id, int64 data_size) { content::GetContentClient()->browser()->GetMHTMLGenerationManager()-> MHTMLGenerated(job_id, data_size); }