1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_IMPL_H_
6 #define CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_IMPL_H_
12 #include "base/memory/scoped_ptr.h"
13 #include "base/process/process.h"
14 #include "base/timer/timer.h"
15 #include "content/browser/child_process_launcher.h"
16 #include "content/browser/power_monitor_message_broadcaster.h"
17 #include "content/common/content_export.h"
18 #include "content/public/browser/global_request_id.h"
19 #include "content/public/browser/gpu_data_manager_observer.h"
20 #include "content/public/browser/render_process_host.h"
21 #include "ipc/ipc_channel_proxy.h"
22 #include "ui/surface/transport_dib.h"
25 struct ViewHostMsg_CompositorSurfaceBuffersSwapped_Params;
36 class AudioRendererHost;
37 class BrowserDemuxerAndroid;
38 class GpuMessageFilter;
39 class MessagePortMessageFilter;
40 class PeerConnectionTrackerHost;
41 class RendererMainThread;
42 class RenderWidgetHelper;
43 class RenderWidgetHost;
44 class RenderWidgetHostImpl;
45 class RenderWidgetHostViewFrameSubscriber;
46 class StoragePartition;
47 class StoragePartitionImpl;
49 // Implements a concrete RenderProcessHost for the browser process for talking
50 // to actual renderer processes (as opposed to mocks).
52 // Represents the browser side of the browser <--> renderer communication
53 // channel. There will be one RenderProcessHost per renderer process.
55 // This object is refcounted so that it can release its resources when all
56 // hosts using it go away.
58 // This object communicates back and forth with the RenderProcess object
59 // running in the renderer process. Each RenderProcessHost and RenderProcess
60 // keeps a list of RenderView (renderer) and WebContentsImpl (browser) which
61 // are correlated with IDs. This way, the Views and the corresponding ViewHosts
62 // communicate through the two process objects.
64 // A RenderProcessHost is also associated with one and only one
65 // StoragePartition. This allows us to implement strong storage isolation
66 // because all the IPCs from the RenderViews (renderer) will only ever be able
67 // to access the partition they are assigned to.
68 class CONTENT_EXPORT RenderProcessHostImpl
69 : public RenderProcessHost,
70 public ChildProcessLauncher::Client,
71 public GpuDataManagerObserver {
73 RenderProcessHostImpl(BrowserContext* browser_context,
74 StoragePartitionImpl* storage_partition_impl,
75 bool supports_browser_plugin,
77 virtual ~RenderProcessHostImpl();
79 // RenderProcessHost implementation (public portion).
80 virtual void EnableSendQueue() OVERRIDE;
81 virtual bool Init() OVERRIDE;
82 virtual int GetNextRoutingID() OVERRIDE;
83 virtual void AddRoute(int32 routing_id, IPC::Listener* listener) OVERRIDE;
84 virtual void RemoveRoute(int32 routing_id) OVERRIDE;
85 virtual bool WaitForBackingStoreMsg(int render_widget_id,
86 const base::TimeDelta& max_delay,
87 IPC::Message* msg) OVERRIDE;
88 virtual void ReceivedBadMessage() OVERRIDE;
89 virtual void WidgetRestored() OVERRIDE;
90 virtual void WidgetHidden() OVERRIDE;
91 virtual int VisibleWidgetCount() const OVERRIDE;
92 virtual bool IsGuest() const OVERRIDE;
93 virtual StoragePartition* GetStoragePartition() const OVERRIDE;
94 virtual bool FastShutdownIfPossible() OVERRIDE;
95 virtual void DumpHandles() OVERRIDE;
96 virtual base::ProcessHandle GetHandle() const OVERRIDE;
97 virtual TransportDIB* GetTransportDIB(TransportDIB::Id dib_id) OVERRIDE;
98 virtual TransportDIB* MapTransportDIB(TransportDIB::Id dib_id) OVERRIDE;
99 virtual BrowserContext* GetBrowserContext() const OVERRIDE;
100 virtual bool InSameStoragePartition(
101 StoragePartition* partition) const OVERRIDE;
102 virtual int GetID() const OVERRIDE;
103 virtual bool HasConnection() const OVERRIDE;
104 virtual void SetIgnoreInputEvents(bool ignore_input_events) OVERRIDE;
105 virtual bool IgnoreInputEvents() const OVERRIDE;
106 virtual void Cleanup() OVERRIDE;
107 virtual void AddPendingView() OVERRIDE;
108 virtual void RemovePendingView() OVERRIDE;
109 virtual void SetSuddenTerminationAllowed(bool enabled) OVERRIDE;
110 virtual bool SuddenTerminationAllowed() const OVERRIDE;
111 virtual IPC::ChannelProxy* GetChannel() OVERRIDE;
112 virtual void AddFilter(BrowserMessageFilter* filter) OVERRIDE;
113 virtual bool FastShutdownForPageCount(size_t count) OVERRIDE;
114 virtual bool FastShutdownStarted() const OVERRIDE;
115 virtual base::TimeDelta GetChildProcessIdleTime() const OVERRIDE;
116 virtual void SurfaceUpdated(int32 surface_id) OVERRIDE;
117 virtual void ResumeRequestsForView(int route_id) OVERRIDE;
119 // IPC::Sender via RenderProcessHost.
120 virtual bool Send(IPC::Message* msg) OVERRIDE;
122 // IPC::Listener via RenderProcessHost.
123 virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
124 virtual void OnChannelConnected(int32 peer_pid) OVERRIDE;
125 virtual void OnChannelError() OVERRIDE;
127 // ChildProcessLauncher::Client implementation.
128 virtual void OnProcessLaunched() OVERRIDE;
130 scoped_refptr<AudioRendererHost> audio_renderer_host() const;
132 // Tells the ResourceDispatcherHost to resume a deferred navigation without
133 // transferring it to a new renderer process.
134 void ResumeDeferredNavigation(const GlobalRequestID& request_id);
136 // Call this function when it is evident that the child process is actively
137 // performing some operation, for example if we just received an IPC message.
138 void mark_child_process_activity_time() {
139 child_process_activity_time_ = base::TimeTicks::Now();
142 // Returns the current number of active views in this process. Excludes
143 // any RenderViewHosts that are swapped out.
144 int GetActiveViewCount();
146 // Start and end frame subscription for a specific renderer.
147 // This API only supports subscription to accelerated composited frames.
148 void BeginFrameSubscription(
150 scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber);
151 void EndFrameSubscription(int route_id);
153 // Register/unregister the host identified by the host id in the global host
155 static void RegisterHost(int host_id, RenderProcessHost* host);
156 static void UnregisterHost(int host_id);
158 // Returns true if |host| is suitable for launching a new view with |site_url|
159 // in the given |browser_context|.
160 static bool IsSuitableHost(RenderProcessHost* host,
161 BrowserContext* browser_context,
162 const GURL& site_url);
164 // Returns an existing RenderProcessHost for |url| in |browser_context|,
165 // if one exists. Otherwise a new RenderProcessHost should be created and
166 // registered using RegisterProcessHostForSite().
167 // This should only be used for process-per-site mode, which can be enabled
168 // globally with a command line flag or per-site, as determined by
169 // SiteInstanceImpl::ShouldUseProcessPerSite.
170 static RenderProcessHost* GetProcessHostForSite(
171 BrowserContext* browser_context,
174 // Registers the given |process| to be used for any instance of |url|
175 // within |browser_context|.
176 // This should only be used for process-per-site mode, which can be enabled
177 // globally with a command line flag or per-site, as determined by
178 // SiteInstanceImpl::ShouldUseProcessPerSite.
179 static void RegisterProcessHostForSite(
180 BrowserContext* browser_context,
181 RenderProcessHost* process,
184 static base::MessageLoop* GetInProcessRendererThreadForTesting();
186 #if defined(OS_ANDROID)
187 const scoped_refptr<BrowserDemuxerAndroid>& browser_demuxer_android() {
188 return browser_demuxer_android_;
192 MessagePortMessageFilter* message_port_message_filter() const {
193 return message_port_message_filter_;
197 // A proxy for our IPC::Channel that lives on the IO thread (see
198 // browser_process.h)
199 scoped_ptr<IPC::ChannelProxy> channel_;
201 // True if fast shutdown has been performed on this RPH.
202 bool fast_shutdown_started_;
204 // True if we've posted a DeleteTask and will be deleted soon.
207 // The count of currently swapped out but pending RenderViews. We have
208 // started to swap these in, so the renderer process should not exit if
209 // this count is non-zero.
210 int32 pending_views_;
213 friend class VisitRelayingRenderProcessHost;
215 // Creates and adds the IO thread message filters.
216 void CreateMessageFilters();
218 // Control message handlers.
219 void OnShutdownRequest();
220 void OnDumpHandlesDone();
221 void SuddenTerminationChanged(bool enabled);
222 void OnUserMetricsRecordAction(const std::string& action);
223 void OnSavedPageAsMHTML(int job_id, int64 mhtml_file_size);
225 // CompositorSurfaceBuffersSwapped handler when there's no RWH.
226 void OnCompositorSurfaceBuffersSwappedNoHost(
227 const ViewHostMsg_CompositorSurfaceBuffersSwapped_Params& params);
229 // Generates a command line to be used to spawn a renderer and appends the
230 // results to |*command_line|.
231 void AppendRendererCommandLine(CommandLine* command_line) const;
233 // Copies applicable command line switches from the given |browser_cmd| line
234 // flags to the output |renderer_cmd| line flags. Not all switches will be
236 void PropagateBrowserCommandLineToRenderer(const CommandLine& browser_cmd,
237 CommandLine* renderer_cmd) const;
239 // Callers can reduce the RenderProcess' priority.
240 void SetBackgrounded(bool backgrounded);
242 // Handle termination of our process.
243 void ProcessDied(bool already_dead);
245 virtual void OnGpuSwitching() OVERRIDE;
247 // The registered IPC listener objects. When this list is empty, we should
249 IDMap<IPC::Listener> listeners_;
251 // The count of currently visible widgets. Since the host can be a container
252 // for multiple widgets, it uses this count to determine when it should be
254 int32 visible_widgets_;
256 // Does this process have backgrounded priority.
259 // Used to allow a RenderWidgetHost to intercept various messages on the
261 scoped_refptr<RenderWidgetHelper> widget_helper_;
263 // The filter for GPU-related messages coming from the renderer.
264 // Thread safety note: this field is to be accessed from the UI thread.
265 // We don't keep a reference to it, to avoid it being destroyed on the UI
266 // thread, but we clear this field when we clear channel_. When channel_ goes
267 // away, it posts a task to the IO thread to destroy it there, so we know that
268 // it's valid if non-NULL.
269 GpuMessageFilter* gpu_message_filter_;
271 // The filter for MessagePort messages coming from the renderer.
272 scoped_refptr<MessagePortMessageFilter> message_port_message_filter_;
274 // A map of transport DIB ids to cached TransportDIBs
275 std::map<TransportDIB::Id, TransportDIB*> cached_dibs_;
278 // This is the maximum size of |cached_dibs_|
279 MAX_MAPPED_TRANSPORT_DIBS = 3,
282 void ClearTransportDIBCache();
283 // This is used to clear our cache five seconds after the last use.
284 base::DelayTimer<RenderProcessHostImpl> cached_dibs_cleaner_;
286 // Used in single-process mode.
287 scoped_ptr<base::Thread> in_process_renderer_;
289 // True after Init() has been called. We can't just check channel_ because we
290 // also reset that in the case of process termination.
291 bool is_initialized_;
293 // Used to launch and terminate the process without blocking the UI thread.
294 scoped_ptr<ChildProcessLauncher> child_process_launcher_;
296 // Messages we queue while waiting for the process handle. We queue them here
297 // instead of in the channel so that we ensure they're sent after init related
298 // messages that are sent once the process handle is available. This is
299 // because the queued messages may have dependencies on the init messages.
300 std::queue<IPC::Message*> queued_messages_;
302 // The globally-unique identifier for this RPH.
305 BrowserContext* browser_context_;
307 // Owned by |browser_context_|.
308 StoragePartitionImpl* storage_partition_impl_;
310 // True if the process can be shut down suddenly. If this is true, then we're
311 // sure that all the RenderViews in the process can be shutdown suddenly. If
312 // it's false, then specific RenderViews might still be allowed to be shutdown
313 // suddenly by checking their SuddenTerminationAllowed() flag. This can occur
314 // if one WebContents has an unload event listener but another WebContents in
315 // the same process doesn't.
316 bool sudden_termination_allowed_;
318 // Set to true if we shouldn't send input events. We actually do the
319 // filtering for this at the render widget level.
320 bool ignore_input_events_;
322 // Records the last time we regarded the child process active.
323 base::TimeTicks child_process_activity_time_;
325 // Indicates whether this is a RenderProcessHost that has permission to embed
327 bool supports_browser_plugin_;
329 // Indicates whether this is a RenderProcessHost of a Browser Plugin guest
333 // Forwards messages between WebRTCInternals in the browser process
334 // and PeerConnectionTracker in the renderer process.
335 scoped_refptr<PeerConnectionTrackerHost> peer_connection_tracker_host_;
337 // Prevents the class from being added as a GpuDataManagerImpl observer more
339 bool gpu_observer_registered_;
341 // Forwards power state messages to the renderer process.
342 PowerMonitorMessageBroadcaster power_monitor_broadcaster_;
344 scoped_refptr<AudioRendererHost> audio_renderer_host_;
346 #if defined(OS_ANDROID)
347 scoped_refptr<BrowserDemuxerAndroid> browser_demuxer_android_;
350 DISALLOW_COPY_AND_ASSIGN(RenderProcessHostImpl);
353 } // namespace content
355 #endif // CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_IMPL_H_