blob: f7671088971a918b52e6711cebca86f928854d17 [file] [log] [blame]
[email protected]d3d6325d2012-01-03 21:17:361// Copyright (c) 2012 The Chromium Authors. All rights reserved.
license.botbf09a502008-08-24 00:55:552// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
initial.commit09911bf2008-07-26 23:55:294
[email protected]f1a29a02011-10-06 23:08:445#ifndef CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
6#define CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
initial.commit09911bf2008-07-26 23:55:297
avi1023d012015-12-25 02:39:148#include <stddef.h>
9#include <stdint.h>
10
maxmorin017ba8c62017-06-02 10:23:0911#include <map>
leon.han21e0e482017-02-23 04:13:3212#include <memory>
[email protected]6779aa12011-03-29 17:32:2413#include <set>
[email protected]b68d5ed2009-04-16 02:41:2814#include <string>
maxmorin017ba8c62017-06-02 10:23:0915#include <utility>
[email protected]1bc83062009-02-06 00:16:3716#include <vector>
17
jdduke691dd572014-12-02 20:47:5218#include "base/cancelable_callback.h"
Sebastien Marchand836d04b32020-04-28 18:10:0319#include "base/clang_profiling_buildflags.h"
Tal Pressmanc951ed92020-09-01 00:24:2320#include "base/containers/unique_ptr_adapters.h"
avi1023d012015-12-25 02:39:1421#include "base/macros.h"
Gordon Guan96c21ee2019-11-06 15:05:3922#include "base/memory/discardable_memory_allocator.h"
[email protected]5071cb22013-07-10 02:19:0623#include "base/memory/memory_pressure_listener.h"
rockot775ce0d2015-01-27 18:35:0124#include "base/memory/ref_counted.h"
[email protected]e6e30ac2014-01-13 21:24:3925#include "base/metrics/user_metrics_action.h"
[email protected]1223d6ef2011-03-28 16:47:5026#include "base/observer_list.h"
maxmorin017ba8c62017-06-02 10:23:0927#include "base/optional.h"
[email protected]21aa99682013-06-11 07:17:0128#include "base/strings/string16.h"
tbansal99d8aeb2017-05-22 19:12:5829#include "base/time/time.h"
[email protected]037fce02009-01-22 01:42:1530#include "build/build_config.h"
jam8a021512a2015-02-03 18:16:0831#include "content/child/child_thread_impl.h"
Tal Pressmanc951ed92020-09-01 00:24:2332#include "content/common/agent_scheduling_group.mojom.h"
[email protected]8d128d62011-09-13 22:11:5733#include "content/common/content_export.h"
ben76f52b242016-06-18 05:42:4834#include "content/common/frame.mojom.h"
alexmosbc7eafa2014-12-06 01:38:0935#include "content/common/frame_replication_state.h"
samans2040988b2017-04-11 23:58:3536#include "content/common/frame_sink_provider.mojom.h"
jonrossa2ff4f82018-02-16 17:27:4637#include "content/common/render_frame_metadata.mojom.h"
rockote261d2112016-09-21 22:22:2338#include "content/common/render_message_filter.mojom.h"
rockot067ca55f2016-09-30 22:00:1539#include "content/common/renderer.mojom.h"
jam188f19f2017-06-07 03:56:2440#include "content/common/renderer_host.mojom.h"
[email protected]526476902011-10-06 20:34:0641#include "content/public/renderer/render_thread.h"
Yuzhu Shenfe5f3a52018-01-11 21:24:1342#include "content/public/renderer/url_loader_throttle_provider.h"
Sadrul Habib Chowdhury31c98712018-12-11 04:15:1343#include "content/renderer/compositor/compositor_dependencies.h"
Gordon Guan96c21ee2019-11-06 15:05:3944#include "content/renderer/discardable_memory_utils.h"
Amos Limbcc710e2018-06-08 05:51:1745#include "content/renderer/media/audio/audio_input_ipc_factory.h"
penghuang346a46f92016-03-31 21:37:5246#include "gpu/ipc/client/gpu_channel_host.h"
Antoine Laboure55c9ef82017-11-10 18:51:2347#include "ipc/ipc_sync_channel.h"
Scott Violeta35f9a42018-03-22 22:00:4448#include "media/media_buildflags.h"
Julie Jeongeun Kim4e77af2622019-09-11 03:36:4549#include "mojo/public/cpp/bindings/associated_receiver.h"
Julie Jeongeun Kimdaa9aa12019-10-24 02:51:5650#include "mojo/public/cpp/bindings/associated_remote.h"
Julie Jeongeun Kim4e77af2622019-09-11 03:36:4551#include "mojo/public/cpp/bindings/pending_associated_receiver.h"
Julie Jeongeun Kim4421c2e2019-09-11 06:34:3952#include "mojo/public/cpp/bindings/pending_receiver.h"
Julie Jeongeun Kim6f4b7e02019-09-11 05:05:4653#include "mojo/public/cpp/bindings/pending_remote.h"
Gyuyoung Kimef648a2e72019-09-17 09:48:3554#include "mojo/public/cpp/bindings/receiver.h"
Mario Sanchez Prada5492c9a2019-09-10 20:58:1155#include "mojo/public/cpp/bindings/remote.h"
[email protected]d7ff5fb2014-05-29 19:50:2556#include "net/base/network_change_notifier.h"
tbansalb612c5d2017-05-25 18:53:0657#include "net/nqe/effective_connection_type.h"
Ken Rockot54311e62018-02-10 19:01:5258#include "services/network/public/mojom/url_loader_factory.mojom.h"
Miyoung Shin99505dd2019-07-27 12:45:3559#include "services/viz/public/mojom/compositing/compositing_mode_watcher.mojom.h"
Ken Rockot26e4e802018-07-31 15:03:3360#include "third_party/blink/public/common/associated_interfaces/associated_interface_registry.h"
Mike West6e4cbb32019-02-13 09:40:1761#include "third_party/blink/public/common/user_agent/user_agent_metadata.h"
Kent Tamura38fb4342018-07-25 12:47:5362#include "third_party/blink/public/platform/scheduler/web_rail_mode_observer.h"
Daniel Murphy738378c2019-05-31 21:59:2563#include "third_party/blink/public/platform/scheduler/web_thread_scheduler.h"
Blink Reformata30d4232018-04-07 15:31:0664#include "third_party/blink/public/platform/web_connection_type.h"
Antonio Gomes67cf25692020-08-25 17:52:1765#include "third_party/blink/public/web/modules/media/audio/web_audio_output_ipc_factory.h"
Blink Reformata30d4232018-04-07 15:31:0666#include "third_party/blink/public/web/web_memory_statistics.h"
[email protected]08397d52011-02-05 01:53:3867#include "ui/gfx/native_widget_types.h"
initial.commit09911bf2008-07-26 23:55:2968
[email protected]39008c02009-02-11 23:59:2569class SkBitmap;
[email protected]46f36a492010-07-28 19:36:4170
[email protected]180ef242013-11-07 06:50:4671namespace blink {
Antonio Gomes925f9b92019-07-30 23:23:2372class WebVideoCaptureImplManager;
[email protected]b7c7bcf2009-10-03 07:07:3473}
74
[email protected]64ffa0442011-10-03 22:08:3675namespace base {
skyostil457b0a12014-09-09 10:12:0776class SingleThreadTaskRunner;
[email protected]64ffa0442011-10-03 22:08:3677class Thread;
78}
79
[email protected]c29b7ff2013-03-06 03:51:0480namespace cc {
reveman34b7a1522015-03-23 20:27:4781class TaskGraphRunner;
[email protected]c29b7ff2013-03-06 03:51:0482}
83
penghuang346a46f92016-03-31 21:37:5284namespace gpu {
85class GpuChannelHost;
86}
87
[email protected]563d665f2013-02-01 04:42:3988namespace media {
[email protected]2329bfc72014-02-28 02:03:2189class GpuVideoAcceleratorFactories;
[email protected]563d665f2013-02-01 04:42:3990}
91
Ken Rockot13051c932019-11-14 20:11:5192namespace mojo {
93class BinderMap;
94}
95
danakj92429852017-06-29 00:19:0396namespace viz {
Scott Violet7e33efc2018-08-29 22:30:1597class ContextProviderCommandBuffer;
98class Gpu;
Scott Violet703b8242019-06-11 19:34:3699class RasterContextProvider;
100class SyntheticBeginFrameSource;
101} // namespace viz
Scott Violet7e33efc2018-08-29 22:30:15102
[email protected]64ffa0442011-10-03 22:08:36103namespace content {
Tal Pressman9780e2c2020-08-26 06:35:09104class AgentSchedulingGroup;
[email protected]3958e972012-07-17 00:25:41105class AudioRendererMixerManager;
John Abd-El-Maleke1d4de32017-10-21 16:14:29106class CategorizedWorkerPool;
John Abd-El-Maleke1d4de32017-10-21 16:14:29107class GpuVideoAcceleratorFactoriesImpl;
tyoshino832a58a2016-04-18 08:14:08108class RenderThreadObserver;
tfarina556a7232014-10-05 01:02:09109class RendererBlinkPlatformImpl;
John Abd-El-Malek6b56ef712017-10-21 22:52:46110class ResourceDispatcher;
Alex Clarke9fc39b9b2020-01-31 17:29:47111class VariationsRenderThreadObserver;
[email protected]cb25aa12012-08-07 19:13:43112
boliubee541f42015-11-05 00:52:53113#if defined(OS_ANDROID)
siva.gunturi5d4feb052015-11-15 16:15:31114class StreamTextureFactory;
boliubee541f42015-11-05 00:52:53115#endif
116
Matt Falkenhagenef13d782019-05-30 21:02:12117// The RenderThreadImpl class represents the main thread, where RenderView
initial.commit09911bf2008-07-26 23:55:29118// instances live. The RenderThread supports an API that is used by its
119// consumer to talk indirectly to the RenderViews and supporting objects.
120// Likewise, it provides an API for the RenderViews to talk back to the main
[email protected]770005b2012-04-16 15:58:13121// process (i.e., their corresponding WebContentsImpl).
initial.commit09911bf2008-07-26 23:55:29122//
123// Most of the communication occurs in the form of IPC messages. They are
124// routed to the RenderThread according to the routing IDs of the messages.
125// The routing IDs correspond to RenderView instances.
danakj6e3bf8012014-12-16 18:27:53126class CONTENT_EXPORT RenderThreadImpl
127 : public RenderThread,
jam8a021512a2015-02-03 18:16:08128 public ChildThreadImpl,
Nico Weber43ddd7a32017-08-15 19:19:27129 public mojom::Renderer,
danakjab9ef4d2017-10-31 23:38:33130 public viz::mojom::CompositingModeWatcher,
Nico Weber43ddd7a32017-08-15 19:19:27131 public CompositorDependencies {
initial.commit09911bf2008-07-26 23:55:29132 public:
[email protected]f1a29a02011-10-06 23:08:44133 static RenderThreadImpl* current();
rockot5c478a72016-09-28 23:14:18134 static mojom::RenderMessageFilter* current_render_message_filter();
olegmax045f7fb12017-05-19 07:58:55135 static RendererBlinkPlatformImpl* current_blink_platform_impl();
rockot5c478a72016-09-28 23:14:18136
137 static void SetRenderMessageFilterForTesting(
138 mojom::RenderMessageFilter* render_message_filter);
olegmax045f7fb12017-05-19 07:58:55139 static void SetRendererBlinkPlatformImplForTesting(
140 RendererBlinkPlatformImpl* blink_platform_impl);
[email protected]526476902011-10-06 20:34:06141
John Abd-El-Malekd4882642017-12-04 21:45:19142 // Returns the task runner for the main thread where the RenderThread lives.
Hajime Hoshi20578c62018-01-12 09:43:26143 static scoped_refptr<base::SingleThreadTaskRunner>
144 DeprecatedGetMainTaskRunner();
John Abd-El-Malekd4882642017-12-04 21:45:19145
Wez6979109b2018-09-07 17:30:56146 RenderThreadImpl(
147 base::RepeatingClosure quit_closure,
Greg Kraynovf5d60272018-08-10 12:28:51148 std::unique_ptr<blink::scheduler::WebThreadScheduler> scheduler);
149 RenderThreadImpl(
150 const InProcessChildThreadParams& params,
Sunny Sachanandanie3e582502019-10-22 20:10:38151 int32_t client_id,
Greg Kraynovf5d60272018-08-10 12:28:51152 std::unique_ptr<blink::scheduler::WebThreadScheduler> scheduler);
dcheng6d18e402014-10-21 12:32:52153 ~RenderThreadImpl() override;
154 void Shutdown() override;
harakenbbfdd9f02017-01-12 07:14:04155 bool ShouldBeDestroyed() override;
initial.commit09911bf2008-07-26 23:55:29156
[email protected]58436a12012-03-21 17:10:26157 // When initializing WebKit, ensure that any schemes needed for the content
158 // module are registered properly. Static to allow sharing with tests.
159 static void RegisterSchemes();
160
[email protected]e9ff79c2012-10-19 21:31:26161 // RenderThread implementation:
dcheng6d18e402014-10-21 12:32:52162 bool Send(IPC::Message* msg) override;
dcheng6d18e402014-10-21 12:32:52163 IPC::SyncChannel* GetChannel() override;
164 std::string GetLocale() override;
165 IPC::SyncMessageFilter* GetSyncMessageFilter() override;
avi1023d012015-12-25 02:39:14166 void AddRoute(int32_t routing_id, IPC::Listener* listener) override;
167 void RemoveRoute(int32_t routing_id) override;
dcheng6d18e402014-10-21 12:32:52168 int GenerateRoutingID() override;
169 void AddFilter(IPC::MessageFilter* filter) override;
170 void RemoveFilter(IPC::MessageFilter* filter) override;
tyoshino832a58a2016-04-18 08:14:08171 void AddObserver(RenderThreadObserver* observer) override;
172 void RemoveObserver(RenderThreadObserver* observer) override;
dcheng6d18e402014-10-21 12:32:52173 void SetResourceDispatcherDelegate(
mohan.reddyee0b42a2014-10-08 04:53:14174 ResourceDispatcherDelegate* delegate) override;
Clemens Hammacher38b6a762019-02-05 13:07:22175 void RegisterExtension(std::unique_ptr<v8::Extension> extension) override;
danakj710b4c02019-11-28 16:08:45176 int PostTaskToAllWebWorkers(base::RepeatingClosure closure) override;
dcheng6d18e402014-10-21 12:32:52177 bool ResolveProxy(const GURL& url, std::string* proxy_list) override;
178 base::WaitableEvent* GetShutdownEvent() override;
staraz067f58242016-11-07 21:06:41179 int32_t GetClientId() override;
Nasko Oskov3d0d1dc2018-09-25 03:57:13180 bool IsOnline() override;
Karan Bhatiac89897f2017-08-10 01:06:40181 void SetRendererProcessType(
Yuta Kitamura63593502018-11-12 09:27:13182 blink::scheduler::WebRendererProcessType type) override;
Lucas Furukawa Gadanid51ff5d62018-12-07 21:26:49183 blink::WebString GetUserAgent() override;
Mike West6e4cbb32019-02-13 09:40:17184 const blink::UserAgentMetadata& GetUserAgentMetadata() override;
Virender Singhdfc6c792019-12-03 05:40:03185 bool IsUseZoomForDSF() override;
[email protected]1223d6ef2011-03-28 16:47:50186
rockot067ca55f2016-09-30 22:00:15187 // IPC::Listener implementation via ChildThreadImpl:
188 void OnAssociatedInterfaceRequest(
189 const std::string& name,
190 mojo::ScopedInterfaceEndpointHandle handle) override;
191
weilifabbf7572017-05-22 19:05:16192 // ChildThread implementation via ChildThreadImpl:
193 scoped_refptr<base::SingleThreadTaskRunner> GetIOTaskRunner() override;
194
danakj6e3bf8012014-12-16 18:27:53195 // CompositorDependencies implementation.
danakj6e3bf8012014-12-16 18:27:53196 bool IsLcdTextEnabled() override;
ccamerona7644752014-12-30 01:16:31197 bool IsElasticOverscrollEnabled() override;
danakj4b347212018-07-04 17:55:17198 bool IsUseZoomForDSFEnabled() override;
Dave Tapuska14d816f2020-04-20 16:21:13199 bool IsSingleThreaded() override;
danakjf24dc812019-10-04 19:03:16200 scoped_refptr<base::SingleThreadTaskRunner> GetCleanupTaskRunner() override;
Yuta Kitamuradeb91bb2018-05-29 05:53:20201 blink::scheduler::WebThreadScheduler* GetWebMainThreadScheduler() override;
reveman34b7a1522015-03-23 20:27:47202 cc::TaskGraphRunner* GetTaskGraphRunner() override;
wjmaclean1d970622017-01-21 22:28:24203 bool IsScrollAnimatorEnabled() override;
Khushal3e96e662017-10-30 23:16:50204 std::unique_ptr<cc::UkmRecorderFactory> CreateUkmRecorderFactory() override;
danakj2d2889a2019-04-05 21:22:08205 void RequestNewLayerTreeFrameSink(
Erik Chen450ab562019-10-10 18:58:13206 RenderWidget* render_widget,
danakj2d2889a2019-04-05 21:22:08207 const GURL& url,
208 LayerTreeFrameSinkCallback callback,
danakj2d2889a2019-04-05 21:22:08209 const char* client_name) override;
danakj6e3bf8012014-12-16 18:27:53210
danakje6da4f12018-07-04 17:41:30211 bool IsThreadedAnimationEnabled();
Dave Tapuska14d816f2020-04-20 16:21:13212 scoped_refptr<base::SingleThreadTaskRunner>
213 GetCompositorMainThreadTaskRunner();
danakje6da4f12018-07-04 17:41:30214
danakjab9ef4d2017-10-31 23:38:33215 // viz::mojom::CompositingModeWatcher implementation.
216 void CompositingModeFallbackToSoftware() override;
217
218 // Whether gpu compositing is being used or is disabled for software
219 // compositing. Clients of the compositor should give resources that match
220 // the appropriate mode.
221 bool IsGpuCompositingDisabled() { return is_gpu_compositing_disabled_; }
222
[email protected]b3e83de2012-02-07 03:33:28223 // Synchronously establish a channel to the GPU plugin if not previously
224 // established or if it has been lost (for example if the GPU plugin crashed).
225 // If there is a pending asynchronous request, it will be completed by the
Bo Liud1ef1c32017-12-08 06:15:50226 // time this routine returns.
227 scoped_refptr<gpu::GpuChannelHost> EstablishGpuChannelSync();
[email protected]b3e83de2012-02-07 03:33:28228
pimanc44437a22016-10-29 00:09:22229 gpu::GpuMemoryBufferManager* GetGpuMemoryBufferManager();
230
Sam McNally52e50282017-11-29 00:54:02231 blink::AssociatedInterfaceRegistry* GetAssociatedInterfaceRegistry();
rockot067ca55f2016-09-30 22:00:15232
Gordon Guan96c21ee2019-11-06 15:05:39233 base::DiscardableMemoryAllocator* GetDiscardableMemoryAllocatorForTest()
234 const {
235 return discardable_memory_allocator_.get();
penghuang342762b2016-12-02 21:04:58236 }
237
tfarina556a7232014-10-05 01:02:09238 RendererBlinkPlatformImpl* blink_platform_impl() const {
239 DCHECK(blink_platform_impl_);
240 return blink_platform_impl_.get();
[email protected]078780b2014-06-20 16:57:06241 }
242
Yuta Kitamura4e256bfc2018-09-27 06:32:35243 // Returns the task runner on the compositor thread.
244 //
danakj6e3bf8012014-12-16 18:27:53245 // Will be null if threaded compositing has not been enabled.
skyostil2d3b5bd2015-05-27 15:40:59246 scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner() const {
247 return compositor_task_runner_;
[email protected]a9fb30aa2011-10-06 06:58:46248 }
249
John Abd-El-Malek6b56ef712017-10-21 22:52:46250 ResourceDispatcher* resource_dispatcher() const {
251 return resource_dispatcher_.get();
252 }
253
Yuzhu Shenfe5f3a52018-01-11 21:24:13254 URLLoaderThrottleProvider* url_loader_throttle_provider() const {
255 return url_loader_throttle_provider_.get();
256 }
257
[email protected]6ca6a082013-09-22 20:10:05258#if defined(OS_ANDROID)
siva.gunturi5d4feb052015-11-15 16:15:31259 scoped_refptr<StreamTextureFactory> GetStreamTexureFactory();
boliuf8753bf62016-02-11 20:09:42260 bool EnableStreamTextureCopy();
[email protected]6ca6a082013-09-22 20:10:05261#endif
262
Antonio Gomes925f9b92019-07-30 23:23:23263 blink::WebVideoCaptureImplManager* video_capture_impl_manager() const {
[email protected]80b161a2011-06-27 17:42:11264 return vc_manager_.get();
265 }
266
rockote261d2112016-09-21 22:22:23267 mojom::RenderMessageFilter* render_message_filter();
rockot1587e332016-07-27 17:44:14268
[email protected]6217d392010-03-25 22:08:35269 // Get the GPU channel. Returns NULL if the channel is not established or
270 // has been lost.
penghuang346a46f92016-03-31 21:37:52271 gpu::GpuChannelHost* GetGpuChannel();
[email protected]6217d392010-03-25 22:08:35272
skyostil2d3b5bd2015-05-27 15:40:59273 // Returns a SingleThreadTaskRunner instance corresponding to the message loop
[email protected]c1330c82013-06-06 02:23:25274 // of the thread on which media operations should be run. Must be called
275 // on the renderer's main thread.
acolwellb4034942014-08-28 15:42:43276 scoped_refptr<base::SingleThreadTaskRunner> GetMediaThreadTaskRunner();
[email protected]c1330c82013-06-06 02:23:25277
dcastagna4517a182015-08-05 19:51:03278 // A TaskRunner instance that runs tasks on the raster worker pool.
279 base::TaskRunner* GetWorkerTaskRunner();
dcastagnab880e8f2015-06-30 20:16:06280
CJ DiMeglio79f7c91a22018-08-30 22:24:43281 // Creates a ContextProvider if yet created, and returns it to be used for
282 // video frame compositing. The ContextProvider given as an argument is
283 // one that has been lost, and is a hint to the RenderThreadImpl to clear
284 // it's |video_frame_compositor_context_provider_| if it matches.
Sergey Ulanov83f4a152019-02-14 03:54:25285 scoped_refptr<viz::RasterContextProvider>
286 GetVideoFrameCompositorContextProvider(
287 scoped_refptr<viz::RasterContextProvider>);
CJ DiMeglio79f7c91a22018-08-30 22:24:43288
danakj0b4b94e32016-05-10 22:33:01289 // Returns a worker context provider that will be bound on the compositor
290 // thread.
Victor Miuraff6488612017-12-21 04:16:15291 scoped_refptr<viz::RasterContextProvider>
Jonathan Backer8e4f35d2018-10-15 20:56:42292 SharedCompositorWorkerContextProvider(bool try_gpu_rasterization);
revemand180dfc32015-09-24 00:19:43293
dcastagna7f45dada2015-10-19 20:17:35294 media::GpuVideoAcceleratorFactories* GetGpuFactories();
[email protected]3bb8bb32013-07-11 13:13:03295
Scott Violet703b8242019-06-11 19:34:36296 scoped_refptr<viz::ContextProviderCommandBuffer>
sadrul85cc5d82016-12-20 03:37:41297 SharedMainThreadContextProvider();
[email protected]c29b7ff2013-03-06 03:51:04298
[email protected]3958e972012-07-17 00:25:41299 // AudioRendererMixerManager instance which manages renderer side mixer
300 // instances shared based on configured audio parameters. Lazily created on
301 // first call.
[email protected]e9ff79c2012-10-19 21:31:26302 AudioRendererMixerManager* GetAudioRendererMixerManager();
[email protected]3958e972012-07-17 00:25:41303
Yuzu Saijo9acd7e62019-06-12 10:05:31304 class UnfreezableMessageFilter : public IPC::MessageFilter {
305 public:
306 explicit UnfreezableMessageFilter(RenderThreadImpl* render_thread_impl);
307 bool OnMessageReceived(const IPC::Message& message) override;
308
309 // Adds |unfreezable_task_runner| for the task to be executed later.
310 void AddListenerUnfreezableTaskRunner(
311 int32_t routing_id,
312 scoped_refptr<base::SingleThreadTaskRunner> unfreezable_task_runner);
313
Brook Hongc4ab7a02020-04-02 16:55:54314 // Removes |unfreezable_task_runner| for the task to be executed later.
315 void RemoveListenerUnfreezableTaskRunner(
316 int32_t routing_id);
317
Yuzu Saijo9acd7e62019-06-12 10:05:31318 // Called on the I/O thread.
319 // Returns the unfreezable task runner associated with |routing_id|.
320 scoped_refptr<base::SingleThreadTaskRunner> GetUnfreezableTaskRunner(
321 int32_t routing_id);
322
323 private:
324 ~UnfreezableMessageFilter() override;
325 RenderThreadImpl* render_thread_impl_;
326 base::Lock unfreezable_task_runners_lock_;
327 // Map of routing_id and listener's thread unfreezable task runner.
328 std::map<int32_t, scoped_refptr<base::SingleThreadTaskRunner>>
329 unfreezable_task_runners_ GUARDED_BY(unfreezable_task_runners_lock_);
330 };
331
[email protected]b2d98762012-09-03 17:04:06332 // For producing custom V8 histograms. Custom histograms are produced if all
333 // RenderViews share the same host, and the host is in the pre-specified set
334 // of hosts we want to produce custom diagrams for. The name for a custom
335 // diagram is the name of the corresponding generic diagram plus a
336 // host-specific suffix.
337 class CONTENT_EXPORT HistogramCustomizer {
338 public:
339 HistogramCustomizer();
340 ~HistogramCustomizer();
341
342 // Called when a top frame of a RenderView navigates. This function updates
343 // RenderThreadImpl's information about whether all RenderViews are
344 // displaying a page from the same host. |host| is the host where a
345 // RenderView navigated, and |view_count| is the number of RenderViews in
346 // this process.
347 void RenderViewNavigatedToHost(const std::string& host, size_t view_count);
348
349 // Used for customizing some histograms if all RenderViews share the same
350 // host. Returns the current custom histogram name to use for
351 // |histogram_name|, or |histogram_name| if it shouldn't be customized.
352 std::string ConvertToCustomHistogramName(const char* histogram_name) const;
353
354 private:
hablichd6a4f122015-10-28 11:34:49355 FRIEND_TEST_ALL_PREFIXES(RenderThreadImplUnittest,
356 IdentifyAlexaTop10NonGoogleSite);
[email protected]b2d98762012-09-03 17:04:06357 friend class RenderThreadImplUnittest;
Yuzu Saijo9acd7e62019-06-12 10:05:31358 friend class UnfreezableMessageFilter;
[email protected]b2d98762012-09-03 17:04:06359
hablichd6a4f122015-10-28 11:34:49360 // Converts a host name to a suffix for histograms
361 std::string HostToCustomHistogramSuffix(const std::string& host);
362
363 // Helper function to identify a certain set of top pages
364 bool IsAlexaTop10NonGoogleSite(const std::string& host);
365
[email protected]b2d98762012-09-03 17:04:06366 // Used for updating the information on which is the common host which all
367 // RenderView's share (if any). If there is no common host, this function is
368 // called with an empty string.
369 void SetCommonHost(const std::string& host);
370
371 // The current common host of the RenderViews; empty string if there is no
372 // common host.
373 std::string common_host_;
374 // The corresponding suffix.
375 std::string common_host_histogram_suffix_;
376 // Set of histograms for which we want to produce a custom histogram if
377 // possible.
378 std::set<std::string> custom_histograms_;
379
380 DISALLOW_COPY_AND_ASSIGN(HistogramCustomizer);
381 };
382
383 HistogramCustomizer* histogram_customizer() {
384 return &histogram_customizer_;
385 }
386
benf28ce882017-05-02 16:15:49387 void RegisterPendingFrameCreate(
benf28ce882017-05-02 16:15:49388 int routing_id,
Henrique Ferreiro3a9751c2019-09-30 13:54:07389 mojo::PendingReceiver<mojom::Frame> frame);
rockotf8fdd9b2015-12-16 22:22:35390
jam188f19f2017-06-07 03:56:24391 mojom::RendererHost* GetRendererHost();
jamc912ca32016-02-24 20:17:31392
keishi51ed0d52017-01-12 10:04:46393 struct RendererMemoryMetrics {
394 size_t partition_alloc_kb;
395 size_t blink_gc_kb;
396 size_t malloc_mb;
397 size_t discardable_kb;
398 size_t v8_main_thread_isolate_mb;
399 size_t total_allocated_mb;
400 size_t non_discardable_total_allocated_mb;
401 size_t total_allocated_per_render_view_mb;
402 };
bashia0ba0d42017-04-03 08:11:06403 bool GetRendererMemoryMetrics(RendererMemoryMetrics* memory_metrics) const;
keishi51ed0d52017-01-12 10:04:46404
Takashi SAKAMOTO870f6262017-08-22 04:08:27405 bool NeedsToRecordFirstActivePaint(int metric_type) const;
tasakb95dbb50c2017-02-08 18:07:50406
Aditya Keerthie84331b32019-03-20 15:25:52407 void RecordMetricsForBackgroundedRendererPurge();
408
Miguel Casas5e1018052018-01-09 19:17:36409 // Sets the current pipeline rendering color space.
410 void SetRenderingColorSpace(const gfx::ColorSpace& color_space);
411
CJ DiMeglio79f7c91a22018-08-30 22:24:43412 scoped_refptr<base::SingleThreadTaskRunner>
413 CreateVideoFrameCompositorTaskRunner();
414
CJ DiMegliob6eb9cd2018-11-06 23:44:01415 // In the case of kOnDemand, we wont be using the task_runner created in
416 // CreateVideoFrameCompositorTaskRunner.
417 // TODO(https://crbug/901513): Remove once kOnDemand is removed.
418 void SetVideoFrameCompositorTaskRunner(
419 scoped_refptr<base::SingleThreadTaskRunner> task_runner) {
420 video_frame_compositor_task_runner_ = task_runner;
421 }
422
[email protected]8930d472009-02-21 08:05:28423 private:
Aditya Keerthic0d45b42019-02-25 18:53:00424 friend class RenderThreadImplBrowserTest;
425
Nicholas Verne06de8122017-11-16 04:47:38426 void OnProcessFinalRelease() override;
torne88b66452016-05-03 13:22:14427 // IPC::Listener
428 void OnChannelError() override;
429
[email protected]57cf97882013-06-26 20:39:01430 // ChildThread
dcheng6d18e402014-10-21 12:32:52431 bool OnControlMessageReceived(const IPC::Message& msg) override;
liberato3aeeb2c2016-02-25 17:54:38432 void RecordAction(const base::UserMetricsAction& action) override;
433 void RecordComputedAction(const std::string& action) override;
initial.commit09911bf2008-07-26 23:55:29434
sadrul53546592016-12-17 01:44:21435 bool IsMainThread();
[email protected]57cf97882013-06-26 20:39:01436
Greg Kraynovf5d60272018-08-10 12:28:51437 void Init();
vollick1050cc62015-12-03 07:04:54438 void InitializeCompositorThread();
Ken Rockot13051c932019-11-14 20:11:51439 void InitializeWebKit(mojo::BinderMap* binders);
jam75c44222016-03-23 05:34:24440
initial.commit09911bf2008-07-26 23:55:29441 void OnTransferBitmap(const SkBitmap& bitmap, int resource_id);
[email protected]b3df5a42010-05-11 14:31:09442 void OnGetAccessibilityTree();
blundellc00adf442016-09-16 10:43:41443
rockot067ca55f2016-09-30 22:00:15444 // mojom::Renderer:
rockot067ca55f2016-09-30 22:00:15445 void CreateView(mojom::CreateViewParamsPtr params) override;
Erik Chen3433ee02019-08-05 20:14:26446 void DestroyView(int32_t view_id) override;
rockot53be7caf2016-10-04 20:17:08447 void CreateFrame(mojom::CreateFrameParamsPtr params) override;
Tal Pressmanc951ed92020-09-01 00:24:23448 void CreateAgentSchedulingGroup(
449 mojo::PendingRemote<mojom::AgentSchedulingGroupHost>
450 agent_scheduling_group_host,
451 mojo::PendingReceiver<mojom::AgentSchedulingGroup> agent_scheduling_group)
452 override;
Dmitry Gozman89361212018-02-13 16:10:44453 void CreateFrameProxy(
454 int32_t routing_id,
455 int32_t render_view_routing_id,
Antonio Gomesde8657a452020-05-25 17:14:47456 const base::Optional<base::UnguessableToken>& opener_frame_token,
Dmitry Gozman89361212018-02-13 16:10:44457 int32_t parent_routing_id,
458 const FrameReplicationState& replicated_state,
Dave Tapuska84449382020-05-01 00:39:04459 const base::UnguessableToken& frame_token,
Dmitry Gozman89361212018-02-13 16:10:44460 const base::UnguessableToken& devtools_frame_token) override;
rockota2db0da2016-10-18 17:39:11461 void OnNetworkConnectionChanged(
462 net::NetworkChangeNotifier::ConnectionType type,
463 double max_bandwidth_mbps) override;
tbansalb612c5d2017-05-25 18:53:06464 void OnNetworkQualityChanged(net::EffectiveConnectionType type,
465 base::TimeDelta http_rtt,
tbansal99d8aeb2017-05-22 19:12:58466 base::TimeDelta transport_rtt,
tbansal15973c32017-05-10 18:40:44467 double bandwidth_kbps) override;
rockota2db0da2016-10-18 17:39:11468 void SetWebKitSharedTimersSuspended(bool suspend) override;
Yutaka Hiranob0465f72018-05-17 05:48:25469 void SetUserAgent(const std::string& user_agent) override;
Mike West6e4cbb32019-02-13 09:40:17470 void SetUserAgentMetadata(const blink::UserAgentMetadata& metadata) override;
John Abd-El-Malek4058ad22020-06-03 21:16:04471 void SetCorsExemptHeaderList(const std::vector<std::string>& list) override;
rockota2db0da2016-10-18 17:39:11472 void UpdateScrollbarTheme(
473 mojom::UpdateScrollbarThemeParamsPtr params) override;
474 void OnSystemColorsChanged(int32_t aqua_color_variant,
475 const std::string& highlight_text_color,
476 const std::string& highlight_color) override;
Ionel Popescu237e8e32019-08-07 19:50:54477 void UpdateSystemColorInfo(
478 mojom::UpdateSystemColorInfoParamsPtr params) override;
rockota2db0da2016-10-18 17:39:11479 void PurgePluginListCache(bool reload_pages) override;
John Budorickee1c9512019-10-17 15:32:19480 void SetProcessState(mojom::RenderProcessBackgroundState background_state,
481 mojom::RenderProcessVisibleState visible_state) override;
Shubhie Panicker45ce80a82018-02-01 01:40:19482 void SetSchedulerKeepActive(bool keep_active) override;
Nasko Oskov1c2c0492019-03-14 20:13:39483 void SetIsLockedToSite() override;
Sebastien Marchand836d04b32020-04-28 18:10:03484#if BUILDFLAG(CLANG_PROFILING_INSIDE_SANDBOX)
485 void WriteClangProfilingProfile(
486 WriteClangProfilingProfileCallback callback) override;
487#endif
Yutaka Hirano9881e99a2020-06-22 06:54:05488 void SetIsCrossOriginIsolated(bool value) override;
[email protected]5071cb22013-07-10 02:19:06489 void OnMemoryPressure(
490 base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level);
rockota2db0da2016-10-18 17:39:11491
rmcilroyaa296052015-04-14 15:35:27492 bool RendererIsHidden() const;
493 void OnRendererHidden();
494 void OnRendererVisible();
[email protected]b3df5a42010-05-11 14:31:09495
Aditya Keerthic0d45b42019-02-25 18:53:00496 bool RendererIsBackgrounded() const;
497 void OnRendererBackgrounded();
498 void OnRendererForegrounded();
499
tasak335a1872017-06-14 09:50:23500 void RecordMemoryUsageAfterBackgrounded(const char* suffix,
501 int foregrounded_count);
Aditya Keerthie84331b32019-03-20 15:25:52502 void OnRecordMetricsForBackgroundedRendererPurgeTimerExpired(
tasakbb0640b2017-05-15 09:02:26503 const char* suffix,
504 int foregrounded_count_when_purged);
tasakb46626a2016-10-18 05:54:44505
ssid0603ca9f2015-06-09 16:48:08506 void ReleaseFreeMemory();
507
hong.zhengb28b5332016-05-11 02:33:39508 void OnSyncMemoryPressure(
509 base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level);
510
Fady Samuelc645ffe2017-07-24 17:28:20511 std::unique_ptr<viz::SyntheticBeginFrameSource>
samans09812d32017-03-27 19:51:50512 CreateSyntheticBeginFrameSource();
513
Julie Jeongeun Kim4e77af2622019-09-11 03:36:45514 void OnRendererInterfaceReceiver(
515 mojo::PendingAssociatedReceiver<mojom::Renderer> receiver);
rockot067ca55f2016-09-30 22:00:15516
Tal Pressmanc951ed92020-09-01 00:24:23517 void RemoveAgentSchedulingGroup(
518 const AgentSchedulingGroup* agent_scheduling_group);
519 base::RepeatingCallback<void(const AgentSchedulingGroup*)>
520 remove_agent_scheduling_group_callback_;
521
Gordon Guan96c21ee2019-11-06 15:05:39522 std::unique_ptr<base::DiscardableMemoryAllocator>
523 discardable_memory_allocator_;
penghuang342762b2016-12-02 21:04:58524
initial.commit09911bf2008-07-26 23:55:29525 // These objects live solely on the render thread.
Yuta Kitamuradeb91bb2018-05-29 05:53:20526 std::unique_ptr<blink::scheduler::WebThreadScheduler> main_thread_scheduler_;
dchengcedca5612016-04-09 01:40:15527 std::unique_ptr<RendererBlinkPlatformImpl> blink_platform_impl_;
John Abd-El-Malek6b56ef712017-10-21 22:52:46528 std::unique_ptr<ResourceDispatcher> resource_dispatcher_;
Yuzhu Shenfe5f3a52018-01-11 21:24:13529 std::unique_ptr<URLLoaderThrottleProvider> url_loader_throttle_provider_;
[email protected]9291ed12009-07-23 17:33:22530
Yuzu Saijo9acd7e62019-06-12 10:05:31531 // Filter out unfreezable messages and pass it to unfreezable task runners.
532 scoped_refptr<UnfreezableMessageFilter> unfreezable_message_filter_;
533
Max Morin3d464a42018-01-15 11:17:00534 // Provides AudioInputIPC objects for audio input devices. Initialized in
535 // Init.
536 base::Optional<AudioInputIPCFactory> audio_input_ipc_factory_;
Max Morin2c38c282018-04-17 07:01:42537 // Provides AudioOutputIPC objects for audio output devices. Initialized in
538 // Init.
Antonio Gomes67cf25692020-08-25 17:52:17539 base::Optional<blink::WebAudioOutputIPCFactory> audio_output_ipc_factory_;
maxmorin017ba8c62017-06-02 10:23:09540
liushouqun517b1292016-09-14 05:58:59541 // Used on the render thread.
Antonio Gomes925f9b92019-07-30 23:23:23542 std::unique_ptr<blink::WebVideoCaptureImplManager> vc_manager_;
[email protected]da9f30a2014-06-18 19:39:04543
Aditya Keerthic0d45b42019-02-25 18:53:00544 // Used to keep track of the renderer's backgrounded and visibility state.
545 // Updated via an IPC from the browser process. If nullopt, the browser
546 // process has yet to send an update and the state is unknown.
John Budorickee1c9512019-10-17 15:32:19547 base::Optional<mojom::RenderProcessBackgroundState> background_state_;
548 base::Optional<mojom::RenderProcessVisibleState> visible_state_;
[email protected]bee16aab2009-08-26 15:55:03549
Yutaka Hiranob0465f72018-05-17 05:48:25550 blink::WebString user_agent_;
Mike West6e4cbb32019-02-13 09:40:17551 blink::UserAgentMetadata user_agent_metadata_;
Yutaka Hiranob0465f72018-05-17 05:48:25552
danakjab9ef4d2017-10-31 23:38:33553 // Sticky once true, indicates that compositing is done without Gpu, so
554 // resources given to the compositor or to the viz service should be
555 // software-based.
556 bool is_gpu_compositing_disabled_ = false;
557
dcastagna7f45dada2015-10-19 20:17:35558 // Utility class to provide GPU functionalities to media.
dcastagna09bd6b32016-02-01 21:54:28559 // TODO(dcastagna): This should be just one scoped_ptr once
560 // http://crbug.com/580386 is fixed.
561 // NOTE(dcastagna): At worst this accumulates a few bytes per context lost.
Miguel Casas-Sanchezcfcca5d52017-07-07 02:32:59562 std::vector<std::unique_ptr<GpuVideoAcceleratorFactoriesImpl>> gpu_factories_;
dcastagna7f45dada2015-10-19 20:17:35563
[email protected]c1330c82013-06-06 02:23:25564 // Thread for running multimedia operations (e.g., video decoding).
dchengcedca5612016-04-09 01:40:15565 std::unique_ptr<base::Thread> media_thread_;
[email protected]c1330c82013-06-06 02:23:25566
skyostil2d3b5bd2015-05-27 15:40:59567 // Will point to appropriate task runner after initialization,
[email protected]ea5f70a2013-03-07 12:30:36568 // regardless of whether |compositor_thread_| is overriden.
skyostil2d3b5bd2015-05-27 15:40:59569 scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner_;
[email protected]ea5f70a2013-03-07 12:30:36570
CJ DiMeglio79f7c91a22018-08-30 22:24:43571 // Task to run the VideoFrameCompositor on.
572 scoped_refptr<base::SingleThreadTaskRunner>
573 video_frame_compositor_task_runner_;
574
dcastagnab880e8f2015-06-30 20:16:06575 // Pool of workers used for raster operations (e.g., tile rasterization).
prashant.nfad657e2016-06-01 07:52:17576 scoped_refptr<CategorizedWorkerPool> categorized_worker_pool_;
reveman34b7a1522015-03-23 20:27:47577
boliubee541f42015-11-05 00:52:53578#if defined(OS_ANDROID)
siva.gunturi5d4feb052015-11-15 16:15:31579 scoped_refptr<StreamTextureFactory> stream_texture_factory_;
boliubee541f42015-11-05 00:52:53580#endif
581
Scott Violet703b8242019-06-11 19:34:36582 scoped_refptr<viz::ContextProviderCommandBuffer> shared_main_thread_contexts_;
[email protected]c29b7ff2013-03-06 03:51:04583
Trent Apteda250ec3ab2018-08-19 08:52:19584 base::ObserverList<RenderThreadObserver>::Unchecked observers_;
[email protected]1223d6ef2011-03-28 16:47:50585
Sergey Ulanov83f4a152019-02-14 03:54:25586 scoped_refptr<viz::RasterContextProvider>
587 video_frame_compositor_context_provider_;
CJ DiMeglio79f7c91a22018-08-30 22:24:43588
Victor Miuraff6488612017-12-21 04:16:15589 scoped_refptr<viz::RasterContextProvider> shared_worker_context_provider_;
[email protected]3b2afc32012-06-18 21:31:16590
dchengcedca5612016-04-09 01:40:15591 std::unique_ptr<AudioRendererMixerManager> audio_renderer_mixer_manager_;
[email protected]3958e972012-07-17 00:25:41592
[email protected]b2d98762012-09-03 17:04:06593 HistogramCustomizer histogram_customizer_;
594
dchengcedca5612016-04-09 01:40:15595 std::unique_ptr<base::MemoryPressureListener> memory_pressure_listener_;
[email protected]5071cb22013-07-10 02:19:06596
Scott Violet703b8242019-06-11 19:34:36597 std::unique_ptr<viz::Gpu> gpu_;
sadrul9e0bb1d2016-08-04 20:18:39598
Alex Clarke9fc39b9b2020-01-31 17:29:47599 std::unique_ptr<VariationsRenderThreadObserver> variations_observer_;
600
skyostil457b0a12014-09-09 10:12:07601 scoped_refptr<base::SingleThreadTaskRunner>
602 main_thread_compositor_task_runner_;
skyostil457b0a12014-09-09 10:12:07603
danakj6e3bf8012014-12-16 18:27:53604 // Compositor settings.
senorblancob60ba952015-01-27 19:12:36605 int gpu_rasterization_msaa_sample_count_;
[email protected]a23530d2014-03-11 06:04:14606 bool is_lcd_text_enabled_;
[email protected]2cccfef2014-05-01 06:05:16607 bool is_zero_copy_enabled_;
ccameronc7fcd132015-11-03 20:14:31608 bool is_gpu_memory_buffer_compositor_resources_enabled_;
ericrk1d17f752015-10-20 03:03:07609 bool is_partial_raster_enabled_;
ccamerona7644752014-12-30 01:16:31610 bool is_elastic_overscroll_enabled_;
danakj4b347212018-07-04 17:55:17611 bool is_zoom_for_dsf_enabled_;
loyso65c93c602015-08-11 05:15:57612 bool is_threaded_animation_enabled_;
wjmaclean1d970622017-01-21 22:28:24613 bool is_scroll_animator_enabled_;
[email protected]a23530d2014-03-11 06:04:14614
Miguel Casas5e1018052018-01-09 19:17:36615 // Target rendering ColorSpace.
616 gfx::ColorSpace rendering_color_space_;
617
Scott Violet9b2d60dc2020-05-13 04:05:04618 // Used when AddRoute() is called and the RenderFrameImpl hasn't been created
619 // yet.
620 std::map<int, mojo::PendingReceiver<mojom::Frame>> pending_frames_;
rockotf8fdd9b2015-12-16 22:22:35621
Julie Jeongeun Kimdaa9aa12019-10-24 02:51:56622 mojo::AssociatedRemote<mojom::RendererHost> renderer_host_;
jamc912ca32016-02-24 20:17:31623
Ken Rockot26e4e802018-07-31 15:03:33624 blink::AssociatedInterfaceRegistry associated_interfaces_;
rockot067ca55f2016-09-30 22:00:15625
Julie Jeongeun Kim4e77af2622019-09-11 03:36:45626 mojo::AssociatedReceiver<mojom::Renderer> renderer_receiver_{this};
rockot067ca55f2016-09-30 22:00:15627
Julie Jeongeun Kim23966e22019-10-26 02:13:29628 mojo::AssociatedRemote<mojom::RenderMessageFilter> render_message_filter_;
rockot1587e332016-07-27 17:44:14629
Tal Pressmanc951ed92020-09-01 00:24:23630 std::set<std::unique_ptr<AgentSchedulingGroup>, base::UniquePtrComparator>
631 agent_scheduling_groups_;
Tal Pressman9780e2c2020-08-26 06:35:09632
tasak72f64042017-01-19 14:02:53633 RendererMemoryMetrics purge_and_suspend_memory_metrics_;
tasakb95dbb50c2017-02-08 18:07:50634 bool needs_to_record_first_active_paint_;
Takashi SAKAMOTO870f6262017-08-22 04:08:27635 base::TimeTicks was_backgrounded_time_;
tasakbb0640b2017-05-15 09:02:26636 int process_foregrounded_count_;
Nasko Oskov3d0d1dc2018-09-25 03:57:13637 bool online_status_ = true;
hajimehoshi69093272016-05-13 08:30:58638
staraz067f58242016-11-07 21:06:41639 int32_t client_id_;
640
Mario Sanchez Prada5492c9a2019-09-10 20:58:11641 mojo::Remote<mojom::FrameSinkProvider> frame_sink_provider_;
samans2040988b2017-04-11 23:58:35642
danakjab9ef4d2017-10-31 23:38:33643 // A mojo connection to the CompositingModeReporter service.
Gyuyoung Kimc9cf74a2019-11-05 00:54:35644 mojo::Remote<viz::mojom::CompositingModeReporter> compositing_mode_reporter_;
danakjab9ef4d2017-10-31 23:38:33645 // The class is a CompositingModeWatcher, which is bound to mojo through
danakj4ee301c2017-11-29 16:19:43646 // this member.
Gyuyoung Kimef648a2e72019-09-17 09:48:35647 mojo::Receiver<viz::mojom::CompositingModeWatcher>
648 compositing_mode_watcher_receiver_{this};
danakjab9ef4d2017-10-31 23:38:33649
Jeremy Roman3bca4bf2019-07-11 03:41:25650 base::WeakPtrFactory<RenderThreadImpl> weak_factory_{this};
Ben Goodgerf180ce12018-02-09 22:54:01651
[email protected]f1a29a02011-10-06 23:08:44652 DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
initial.commit09911bf2008-07-26 23:55:29653};
654
[email protected]e9ff79c2012-10-19 21:31:26655} // namespace content
656
[email protected]f1a29a02011-10-06 23:08:44657#endif // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_