content/common/gpu/gpu_command_buffer_stub.cc

   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.
   4
   5 #include "base/bind.h"
   6 #include "base/bind_helpers.h"
   7 #include "base/command_line.h"
   8 #include "base/hash.h"
   9 #include "base/json/json_writer.h"
  10 #include "base/memory/shared_memory.h"
  11 #include "base/time/time.h"
  12 #include "base/trace_event/trace_event.h"
  13 #include "build/build_config.h"
  14 #include "content/common/gpu/gpu_channel.h"
  15 #include "content/common/gpu/gpu_channel_manager.h"
  16 #include "content/common/gpu/gpu_command_buffer_stub.h"
  17 #include "content/common/gpu/gpu_memory_manager.h"
  18 #include "content/common/gpu/gpu_memory_tracking.h"
  19 #include "content/common/gpu/gpu_messages.h"
  20 #include "content/common/gpu/gpu_watchdog.h"
  21 #include "content/common/gpu/image_transport_surface.h"
  22 #include "content/common/gpu/media/gpu_video_decode_accelerator.h"
  23 #include "content/common/gpu/media/gpu_video_encode_accelerator.h"
  24 #include "content/public/common/content_client.h"
  25 #include "content/public/common/content_switches.h"
  26 #include "gpu/command_buffer/common/constants.h"
  27 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
  28 #include "gpu/command_buffer/common/mailbox.h"
  29 #include "gpu/command_buffer/service/gl_context_virtual.h"
  30 #include "gpu/command_buffer/service/gl_state_restorer_impl.h"
  31 #include "gpu/command_buffer/service/image_factory.h"
  32 #include "gpu/command_buffer/service/image_manager.h"
  33 #include "gpu/command_buffer/service/logger.h"
  34 #include "gpu/command_buffer/service/mailbox_manager.h"
  35 #include "gpu/command_buffer/service/memory_tracking.h"
  36 #include "gpu/command_buffer/service/query_manager.h"
  37 #include "gpu/command_buffer/service/sync_point_manager.h"
  38 #include "gpu/command_buffer/service/valuebuffer_manager.h"
  39 #include "ui/gl/gl_bindings.h"
  40 #include "ui/gl/gl_switches.h"
  41
  42 #if defined(OS_WIN)
  43 #include "base/win/win_util.h"
  44 #include "content/public/common/sandbox_init.h"
  45 #endif
  46
  47 #if defined(OS_ANDROID)
  48 #include "content/common/gpu/stream_texture_android.h"
  49 #endif
  50
  51 namespace content {
  52 struct WaitForCommandState {
  53   WaitForCommandState(int32 start, int32 end, IPC::Message* reply)
  54       : start(start), end(end), reply(reply) {}
  55
  56   int32 start;
  57   int32 end;
  58   scoped_ptr<IPC::Message> reply;
  59 };
  60
  61 namespace {
  62
  63 // The GpuCommandBufferMemoryTracker class provides a bridge between the
  64 // ContextGroup's memory type managers and the GpuMemoryManager class.
  65 class GpuCommandBufferMemoryTracker : public gpu::gles2::MemoryTracker {
  66  public:
  67   explicit GpuCommandBufferMemoryTracker(GpuChannel* channel)
  68       : tracking_group_(
  69             channel->gpu_channel_manager()
  70                 ->gpu_memory_manager()
  71                 ->CreateTrackingGroup(channel->renderer_pid(), this)),
  72         client_tracing_id_(channel->client_tracing_id()),
  73         client_id_(channel->client_id()) {}
  74
  75   void TrackMemoryAllocatedChange(
  76       size_t old_size,
  77       size_t new_size,
  78       gpu::gles2::MemoryTracker::Pool pool) override {
  79     tracking_group_->TrackMemoryAllocatedChange(
  80         old_size, new_size, pool);
  81   }
  82
  83   bool EnsureGPUMemoryAvailable(size_t size_needed) override {
  84     return tracking_group_->EnsureGPUMemoryAvailable(size_needed);
  85   };
  86
  87   uint64_t ClientTracingId() const override { return client_tracing_id_; }
  88   int ClientId() const override { return client_id_; }
  89
  90  private:
  91   ~GpuCommandBufferMemoryTracker() override {}
  92   scoped_ptr<GpuMemoryTrackingGroup> tracking_group_;
  93   const uint64_t client_tracing_id_;
  94   const int client_id_;
  95
  96   DISALLOW_COPY_AND_ASSIGN(GpuCommandBufferMemoryTracker);
  97 };
  98
  99 // FastSetActiveURL will shortcut the expensive call to SetActiveURL when the
 100 // url_hash matches.
 101 void FastSetActiveURL(const GURL& url, size_t url_hash) {
 102   // Leave the previously set URL in the empty case -- empty URLs are given by
 103   // BlinkPlatformImpl::createOffscreenGraphicsContext3D. Hopefully the
 104   // onscreen context URL was set previously and will show up even when a crash
 105   // occurs during offscreen command processing.
 106   if (url.is_empty())
 107     return;
 108   static size_t g_last_url_hash = 0;
 109   if (url_hash != g_last_url_hash) {
 110     g_last_url_hash = url_hash;
 111     GetContentClient()->SetActiveURL(url);
 112   }
 113 }
 114
 115 // The first time polling a fence, delay some extra time to allow other
 116 // stubs to process some work, or else the timing of the fences could
 117 // allow a pattern of alternating fast and slow frames to occur.
 118 const int64 kHandleMoreWorkPeriodMs = 2;
 119 const int64 kHandleMoreWorkPeriodBusyMs = 1;
 120
 121 // Prevents idle work from being starved.
 122 const int64 kMaxTimeSinceIdleMs = 10;
 123
 124 class DevToolsChannelData : public base::trace_event::ConvertableToTraceFormat {
 125  public:
 126   static scoped_refptr<base::trace_event::ConvertableToTraceFormat>
 127   CreateForChannel(GpuChannel* channel);
 128
 129   void AppendAsTraceFormat(std::string* out) const override {
 130     std::string tmp;
 131     base::JSONWriter::Write(*value_, &tmp);
 132     *out += tmp;
 133   }
 134
 135  private:
 136   explicit DevToolsChannelData(base::Value* value) : value_(value) {}
 137   ~DevToolsChannelData() override {}
 138   scoped_ptr<base::Value> value_;
 139   DISALLOW_COPY_AND_ASSIGN(DevToolsChannelData);
 140 };
 141
 142 scoped_refptr<base::trace_event::ConvertableToTraceFormat>
 143 DevToolsChannelData::CreateForChannel(GpuChannel* channel) {
 144   scoped_ptr<base::DictionaryValue> res(new base::DictionaryValue);
 145   res->SetInteger("renderer_pid", channel->renderer_pid());
 146   res->SetDouble("used_bytes", channel->GetMemoryUsage());
 147   res->SetDouble("limit_bytes",
 148                  channel->gpu_channel_manager()
 149                      ->gpu_memory_manager()
 150                      ->GetMaximumClientAllocation());
 151   return new DevToolsChannelData(res.release());
 152 }
 153
 154 void RunOnThread(scoped_refptr<base::SingleThreadTaskRunner> task_runner,
 155                  const base::Closure& callback) {
 156   if (task_runner->BelongsToCurrentThread()) {
 157     callback.Run();
 158   } else {
 159     task_runner->PostTask(FROM_HERE, callback);
 160   }
 161 }
 162
 163 }  // namespace
 164
 165 GpuCommandBufferStub::GpuCommandBufferStub(
 166     GpuChannel* channel,
 167     GpuCommandBufferStub* share_group,
 168     const gfx::GLSurfaceHandle& handle,
 169     gpu::gles2::MailboxManager* mailbox_manager,
 170     gpu::gles2::SubscriptionRefSet* subscription_ref_set,
 171     gpu::ValueStateMap* pending_valuebuffer_state,
 172     const gfx::Size& size,
 173     const gpu::gles2::DisallowedFeatures& disallowed_features,
 174     const std::vector<int32>& attribs,
 175     gfx::GpuPreference gpu_preference,
 176     bool use_virtualized_gl_context,
 177     int32 route_id,
 178     int32 surface_id,
 179     GpuWatchdog* watchdog,
 180     bool software,
 181     const GURL& active_url)
 182     : channel_(channel),
 183       handle_(handle),
 184       initial_size_(size),
 185       disallowed_features_(disallowed_features),
 186       requested_attribs_(attribs),
 187       gpu_preference_(gpu_preference),
 188       use_virtualized_gl_context_(use_virtualized_gl_context),
 189       route_id_(route_id),
 190       surface_id_(surface_id),
 191       software_(software),
 192       last_flush_count_(0),
 193       last_memory_allocation_valid_(false),
 194       watchdog_(watchdog),
 195       sync_point_wait_count_(0),
 196       delayed_work_scheduled_(false),
 197       previous_messages_processed_(0),
 198       active_url_(active_url),
 199       total_gpu_memory_(0) {
 200   active_url_hash_ = base::Hash(active_url.possibly_invalid_spec());
 201   FastSetActiveURL(active_url_, active_url_hash_);
 202
 203   gpu::gles2::ContextCreationAttribHelper attrib_parser;
 204   attrib_parser.Parse(requested_attribs_);
 205
 206   if (share_group) {
 207     context_group_ = share_group->context_group_;
 208     DCHECK(context_group_->bind_generates_resource() ==
 209            attrib_parser.bind_generates_resource);
 210   } else {
 211     context_group_ = new gpu::gles2::ContextGroup(
 212         mailbox_manager,
 213         new GpuCommandBufferMemoryTracker(channel),
 214         channel_->gpu_channel_manager()->shader_translator_cache(),
 215         NULL,
 216         subscription_ref_set,
 217         pending_valuebuffer_state,
 218         attrib_parser.bind_generates_resource);
 219   }
 220
 221   use_virtualized_gl_context_ |=
 222       context_group_->feature_info()->workarounds().use_virtualized_gl_contexts;
 223
 224   bool is_offscreen = surface_id_ == 0;
 225   if (is_offscreen && initial_size_.IsEmpty()) {
 226     // If we're an offscreen surface with zero width and/or height, set to a
 227     // non-zero size so that we have a complete framebuffer for operations like
 228     // glClear.
 229     initial_size_ = gfx::Size(1, 1);
 230   }
 231 }
 232
 233 GpuCommandBufferStub::~GpuCommandBufferStub() {
 234   Destroy();
 235
 236   GpuChannelManager* gpu_channel_manager = channel_->gpu_channel_manager();
 237   gpu_channel_manager->Send(new GpuHostMsg_DestroyCommandBuffer(surface_id()));
 238 }
 239
 240 GpuMemoryManager* GpuCommandBufferStub::GetMemoryManager() const {
 241     return channel()->gpu_channel_manager()->gpu_memory_manager();
 242 }
 243
 244 bool GpuCommandBufferStub::OnMessageReceived(const IPC::Message& message) {
 245   TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"),
 246                "GPUTask",
 247                "data",
 248                DevToolsChannelData::CreateForChannel(channel()));
 249   FastSetActiveURL(active_url_, active_url_hash_);
 250
 251   bool have_context = false;
 252   // Ensure the appropriate GL context is current before handling any IPC
 253   // messages directed at the command buffer. This ensures that the message
 254   // handler can assume that the context is current (not necessary for
 255   // RetireSyncPoint or WaitSyncPoint).
 256   if (decoder_.get() &&
 257       message.type() != GpuCommandBufferMsg_SetGetBuffer::ID &&
 258       message.type() != GpuCommandBufferMsg_WaitForTokenInRange::ID &&
 259       message.type() != GpuCommandBufferMsg_WaitForGetOffsetInRange::ID &&
 260       message.type() != GpuCommandBufferMsg_RegisterTransferBuffer::ID &&
 261       message.type() != GpuCommandBufferMsg_DestroyTransferBuffer::ID &&
 262       message.type() != GpuCommandBufferMsg_RetireSyncPoint::ID &&
 263       message.type() != GpuCommandBufferMsg_SignalSyncPoint::ID &&
 264       message.type() !=
 265           GpuCommandBufferMsg_SetClientHasMemoryAllocationChangedCallback::ID) {
 266     if (!MakeCurrent())
 267       return false;
 268     have_context = true;
 269   }
 270
 271   // Always use IPC_MESSAGE_HANDLER_DELAY_REPLY for synchronous message handlers
 272   // here. This is so the reply can be delayed if the scheduler is unscheduled.
 273   bool handled = true;
 274   IPC_BEGIN_MESSAGE_MAP(GpuCommandBufferStub, message)
 275     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_Initialize,
 276                                     OnInitialize);
 277     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_SetGetBuffer,
 278                                     OnSetGetBuffer);
 279     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_ProduceFrontBuffer,
 280                         OnProduceFrontBuffer);
 281     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_WaitForTokenInRange,
 282                                     OnWaitForTokenInRange);
 283     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_WaitForGetOffsetInRange,
 284                                     OnWaitForGetOffsetInRange);
 285     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_AsyncFlush, OnAsyncFlush);
 286     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_Rescheduled, OnRescheduled);
 287     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_RegisterTransferBuffer,
 288                         OnRegisterTransferBuffer);
 289     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_DestroyTransferBuffer,
 290                         OnDestroyTransferBuffer);
 291     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_CreateVideoDecoder,
 292                                     OnCreateVideoDecoder)
 293     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_CreateVideoEncoder,
 294                                     OnCreateVideoEncoder)
 295     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_SetSurfaceVisible,
 296                         OnSetSurfaceVisible)
 297     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_RetireSyncPoint,
 298                         OnRetireSyncPoint)
 299     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_SignalSyncPoint,
 300                         OnSignalSyncPoint)
 301     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_SignalQuery,
 302                         OnSignalQuery)
 303     IPC_MESSAGE_HANDLER(
 304         GpuCommandBufferMsg_SetClientHasMemoryAllocationChangedCallback,
 305         OnSetClientHasMemoryAllocationChangedCallback)
 306     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_CreateImage, OnCreateImage);
 307     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_DestroyImage, OnDestroyImage);
 308     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_CreateStreamTexture,
 309                         OnCreateStreamTexture)
 310     IPC_MESSAGE_UNHANDLED(handled = false)
 311   IPC_END_MESSAGE_MAP()
 312
 313   CheckCompleteWaits();
 314
 315   if (have_context) {
 316     // Ensure that any delayed work that was created will be handled.
 317     ScheduleDelayedWork(kHandleMoreWorkPeriodMs);
 318   }
 319
 320   DCHECK(handled);
 321   return handled;
 322 }
 323
 324 bool GpuCommandBufferStub::Send(IPC::Message* message) {
 325   return channel_->Send(message);
 326 }
 327
 328 bool GpuCommandBufferStub::IsScheduled() {
 329   return (!scheduler_.get() || scheduler_->IsScheduled());
 330 }
 331
 332 bool GpuCommandBufferStub::HasMoreWork() {
 333   return scheduler_.get() && scheduler_->HasMoreWork();
 334 }
 335
 336 void GpuCommandBufferStub::PollWork() {
 337   TRACE_EVENT0("gpu", "GpuCommandBufferStub::PollWork");
 338   delayed_work_scheduled_ = false;
 339   FastSetActiveURL(active_url_, active_url_hash_);
 340   if (decoder_.get() && !MakeCurrent())
 341     return;
 342
 343   if (scheduler_) {
 344     uint64 current_messages_processed =
 345         channel()->gpu_channel_manager()->MessagesProcessed();
 346     // We're idle when no messages were processed or scheduled.
 347     bool is_idle =
 348         (previous_messages_processed_ == current_messages_processed) &&
 349         !channel()->gpu_channel_manager()->HandleMessagesScheduled();
 350     if (!is_idle && !last_idle_time_.is_null()) {
 351       base::TimeDelta time_since_idle =
 352           base::TimeTicks::Now() - last_idle_time_;
 353       base::TimeDelta max_time_since_idle =
 354           base::TimeDelta::FromMilliseconds(kMaxTimeSinceIdleMs);
 355
 356       // Force idle when it's been too long since last time we were idle.
 357       if (time_since_idle > max_time_since_idle)
 358         is_idle = true;
 359     }
 360
 361     if (is_idle) {
 362       last_idle_time_ = base::TimeTicks::Now();
 363       scheduler_->PerformIdleWork();
 364     }
 365   }
 366   ScheduleDelayedWork(kHandleMoreWorkPeriodBusyMs);
 367 }
 368
 369 bool GpuCommandBufferStub::HasUnprocessedCommands() {
 370   if (command_buffer_) {
 371     gpu::CommandBuffer::State state = command_buffer_->GetLastState();
 372     return command_buffer_->GetPutOffset() != state.get_offset &&
 373         !gpu::error::IsError(state.error);
 374   }
 375   return false;
 376 }
 377
 378 void GpuCommandBufferStub::ScheduleDelayedWork(int64 delay) {
 379   if (!HasMoreWork()) {
 380     last_idle_time_ = base::TimeTicks();
 381     return;
 382   }
 383
 384   if (delayed_work_scheduled_)
 385     return;
 386   delayed_work_scheduled_ = true;
 387
 388   // Idle when no messages are processed between now and when
 389   // PollWork is called.
 390   previous_messages_processed_ =
 391       channel()->gpu_channel_manager()->MessagesProcessed();
 392   if (last_idle_time_.is_null())
 393     last_idle_time_ = base::TimeTicks::Now();
 394
 395   // IsScheduled() returns true after passing all unschedule fences
 396   // and this is when we can start performing idle work. Idle work
 397   // is done synchronously so we can set delay to 0 and instead poll
 398   // for more work at the rate idle work is performed. This also ensures
 399   // that idle work is done as efficiently as possible without any
 400   // unnecessary delays.
 401   if (scheduler_.get() &&
 402       scheduler_->IsScheduled() &&
 403       scheduler_->HasMoreIdleWork()) {
 404     delay = 0;
 405   }
 406
 407   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
 408       FROM_HERE, base::Bind(&GpuCommandBufferStub::PollWork, AsWeakPtr()),
 409       base::TimeDelta::FromMilliseconds(delay));
 410 }
 411
 412 bool GpuCommandBufferStub::MakeCurrent() {
 413   if (decoder_->MakeCurrent())
 414     return true;
 415   DLOG(ERROR) << "Context lost because MakeCurrent failed.";
 416   command_buffer_->SetContextLostReason(decoder_->GetContextLostReason());
 417   command_buffer_->SetParseError(gpu::error::kLostContext);
 418   CheckContextLost();
 419   return false;
 420 }
 421
 422 void GpuCommandBufferStub::Destroy() {
 423   if (wait_for_token_) {
 424     Send(wait_for_token_->reply.release());
 425     wait_for_token_.reset();
 426   }
 427   if (wait_for_get_offset_) {
 428     Send(wait_for_get_offset_->reply.release());
 429     wait_for_get_offset_.reset();
 430   }
 431   if (handle_.is_null() && !active_url_.is_empty()) {
 432     GpuChannelManager* gpu_channel_manager = channel_->gpu_channel_manager();
 433     gpu_channel_manager->Send(new GpuHostMsg_DidDestroyOffscreenContext(
 434         active_url_));
 435   }
 436
 437   memory_manager_client_state_.reset();
 438
 439   while (!sync_points_.empty())
 440     OnRetireSyncPoint(sync_points_.front());
 441
 442   if (decoder_)
 443     decoder_->set_engine(NULL);
 444
 445   // The scheduler has raw references to the decoder and the command buffer so
 446   // destroy it before those.
 447   scheduler_.reset();
 448
 449   bool have_context = false;
 450   if (decoder_ && decoder_->GetGLContext()) {
 451     // Try to make the context current regardless of whether it was lost, so we
 452     // don't leak resources.
 453     have_context = decoder_->GetGLContext()->MakeCurrent(surface_.get());
 454   }
 455   FOR_EACH_OBSERVER(DestructionObserver,
 456                     destruction_observers_,
 457                     OnWillDestroyStub());
 458
 459   if (decoder_) {
 460     decoder_->Destroy(have_context);
 461     decoder_.reset();
 462   }
 463
 464   command_buffer_.reset();
 465
 466   // Remove this after crbug.com/248395 is sorted out.
 467   surface_ = NULL;
 468 }
 469
 470 void GpuCommandBufferStub::OnInitializeFailed(IPC::Message* reply_message) {
 471   Destroy();
 472   GpuCommandBufferMsg_Initialize::WriteReplyParams(
 473       reply_message, false, gpu::Capabilities());
 474   Send(reply_message);
 475 }
 476
 477 void GpuCommandBufferStub::OnInitialize(
 478     base::SharedMemoryHandle shared_state_handle,
 479     IPC::Message* reply_message) {
 480   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnInitialize");
 481   DCHECK(!command_buffer_.get());
 482
 483   scoped_ptr<base::SharedMemory> shared_state_shm(
 484       new base::SharedMemory(shared_state_handle, false));
 485
 486   command_buffer_.reset(new gpu::CommandBufferService(
 487       context_group_->transfer_buffer_manager()));
 488
 489   bool result = command_buffer_->Initialize();
 490   DCHECK(result);
 491
 492   decoder_.reset(::gpu::gles2::GLES2Decoder::Create(context_group_.get()));
 493   scheduler_.reset(new gpu::GpuScheduler(command_buffer_.get(),
 494                                          decoder_.get(),
 495                                          decoder_.get()));
 496   if (preemption_flag_.get())
 497     scheduler_->SetPreemptByFlag(preemption_flag_);
 498
 499   decoder_->set_engine(scheduler_.get());
 500
 501   if (!handle_.is_null()) {
 502 #if defined(OS_MACOSX) || defined(UI_COMPOSITOR_IMAGE_TRANSPORT)
 503     if (software_) {
 504       LOG(ERROR) << "No software support.";
 505       OnInitializeFailed(reply_message);
 506       return;
 507     }
 508 #endif
 509
 510     surface_ = ImageTransportSurface::CreateSurface(
 511         channel_->gpu_channel_manager(),
 512         this,
 513         handle_);
 514   } else {
 515     GpuChannelManager* manager = channel_->gpu_channel_manager();
 516     surface_ = manager->GetDefaultOffscreenSurface();
 517   }
 518
 519   if (!surface_.get()) {
 520     DLOG(ERROR) << "Failed to create surface.";
 521     OnInitializeFailed(reply_message);
 522     return;
 523   }
 524
 525   scoped_refptr<gfx::GLContext> context;
 526   if (use_virtualized_gl_context_ && channel_->share_group()) {
 527     context = channel_->share_group()->GetSharedContext();
 528     if (!context.get()) {
 529       context = gfx::GLContext::CreateGLContext(
 530           channel_->share_group(),
 531           channel_->gpu_channel_manager()->GetDefaultOffscreenSurface(),
 532           gpu_preference_);
 533       if (!context.get()) {
 534         DLOG(ERROR) << "Failed to create shared context for virtualization.";
 535         OnInitializeFailed(reply_message);
 536         return;
 537       }
 538       channel_->share_group()->SetSharedContext(context.get());
 539     }
 540     // This should be a non-virtual GL context.
 541     DCHECK(context->GetHandle());
 542     context = new gpu::GLContextVirtual(
 543         channel_->share_group(), context.get(), decoder_->AsWeakPtr());
 544     if (!context->Initialize(surface_.get(), gpu_preference_)) {
 545       // TODO(sievers): The real context created above for the default
 546       // offscreen surface might not be compatible with this surface.
 547       // Need to adjust at least GLX to be able to create the initial context
 548       // with a config that is compatible with onscreen and offscreen surfaces.
 549       context = NULL;
 550
 551       DLOG(ERROR) << "Failed to initialize virtual GL context.";
 552       OnInitializeFailed(reply_message);
 553       return;
 554     }
 555   }
 556   if (!context.get()) {
 557     context = gfx::GLContext::CreateGLContext(
 558         channel_->share_group(), surface_.get(), gpu_preference_);
 559   }
 560   if (!context.get()) {
 561     DLOG(ERROR) << "Failed to create context.";
 562     OnInitializeFailed(reply_message);
 563     return;
 564   }
 565
 566   if (!context->MakeCurrent(surface_.get())) {
 567     LOG(ERROR) << "Failed to make context current.";
 568     OnInitializeFailed(reply_message);
 569     return;
 570   }
 571
 572   if (!context->GetGLStateRestorer()) {
 573     context->SetGLStateRestorer(
 574         new gpu::GLStateRestorerImpl(decoder_->AsWeakPtr()));
 575   }
 576
 577   if (!context->GetTotalGpuMemory(&total_gpu_memory_))
 578     total_gpu_memory_ = 0;
 579
 580   if (!context_group_->has_program_cache() &&
 581       !context_group_->feature_info()->workarounds().disable_program_cache) {
 582     context_group_->set_program_cache(
 583         channel_->gpu_channel_manager()->program_cache());
 584   }
 585
 586   // Initialize the decoder with either the view or pbuffer GLContext.
 587   if (!decoder_->Initialize(surface_,
 588                             context,
 589                             !surface_id(),
 590                             initial_size_,
 591                             disallowed_features_,
 592                             requested_attribs_)) {
 593     DLOG(ERROR) << "Failed to initialize decoder.";
 594     OnInitializeFailed(reply_message);
 595     return;
 596   }
 597
 598   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
 599           switches::kEnableGPUServiceLogging)) {
 600     decoder_->set_log_commands(true);
 601   }
 602
 603   decoder_->GetLogger()->SetMsgCallback(
 604       base::Bind(&GpuCommandBufferStub::SendConsoleMessage,
 605                  base::Unretained(this)));
 606   decoder_->SetShaderCacheCallback(
 607       base::Bind(&GpuCommandBufferStub::SendCachedShader,
 608                  base::Unretained(this)));
 609   decoder_->SetWaitSyncPointCallback(
 610       base::Bind(&GpuCommandBufferStub::OnWaitSyncPoint,
 611                  base::Unretained(this)));
 612
 613   command_buffer_->SetPutOffsetChangeCallback(
 614       base::Bind(&GpuCommandBufferStub::PutChanged, base::Unretained(this)));
 615   command_buffer_->SetGetBufferChangeCallback(
 616       base::Bind(&gpu::GpuScheduler::SetGetBuffer,
 617                  base::Unretained(scheduler_.get())));
 618   command_buffer_->SetParseErrorCallback(
 619       base::Bind(&GpuCommandBufferStub::OnParseError, base::Unretained(this)));
 620   scheduler_->SetSchedulingChangedCallback(
 621       base::Bind(&GpuChannel::StubSchedulingChanged,
 622                  base::Unretained(channel_)));
 623
 624   if (watchdog_) {
 625     scheduler_->SetCommandProcessedCallback(
 626         base::Bind(&GpuCommandBufferStub::OnCommandProcessed,
 627                    base::Unretained(this)));
 628   }
 629
 630   const size_t kSharedStateSize = sizeof(gpu::CommandBufferSharedState);
 631   if (!shared_state_shm->Map(kSharedStateSize)) {
 632     DLOG(ERROR) << "Failed to map shared state buffer.";
 633     OnInitializeFailed(reply_message);
 634     return;
 635   }
 636   command_buffer_->SetSharedStateBuffer(gpu::MakeBackingFromSharedMemory(
 637       shared_state_shm.Pass(), kSharedStateSize));
 638
 639   gpu::Capabilities capabilities = decoder_->GetCapabilities();
 640   capabilities.future_sync_points = channel_->allow_future_sync_points();
 641
 642   GpuCommandBufferMsg_Initialize::WriteReplyParams(
 643       reply_message, true, capabilities);
 644   Send(reply_message);
 645
 646   if (handle_.is_null() && !active_url_.is_empty()) {
 647     GpuChannelManager* gpu_channel_manager = channel_->gpu_channel_manager();
 648     gpu_channel_manager->Send(new GpuHostMsg_DidCreateOffscreenContext(
 649         active_url_));
 650   }
 651 }
 652
 653 void GpuCommandBufferStub::OnCreateStreamTexture(
 654     uint32 texture_id, int32 stream_id, bool* succeeded) {
 655 #if defined(OS_ANDROID)
 656   *succeeded = StreamTexture::Create(this, texture_id, stream_id);
 657 #else
 658   *succeeded = false;
 659 #endif
 660 }
 661
 662 void GpuCommandBufferStub::SetLatencyInfoCallback(
 663     const LatencyInfoCallback& callback) {
 664   latency_info_callback_ = callback;
 665 }
 666
 667 int32 GpuCommandBufferStub::GetRequestedAttribute(int attr) const {
 668   // The command buffer is pairs of enum, value
 669   // search for the requested attribute, return the value.
 670   for (std::vector<int32>::const_iterator it = requested_attribs_.begin();
 671        it != requested_attribs_.end(); ++it) {
 672     if (*it++ == attr) {
 673       return *it;
 674     }
 675   }
 676   return -1;
 677 }
 678
 679 void GpuCommandBufferStub::OnSetGetBuffer(int32 shm_id,
 680                                           IPC::Message* reply_message) {
 681   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnSetGetBuffer");
 682   if (command_buffer_)
 683     command_buffer_->SetGetBuffer(shm_id);
 684   Send(reply_message);
 685 }
 686
 687 void GpuCommandBufferStub::OnProduceFrontBuffer(const gpu::Mailbox& mailbox) {
 688   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnProduceFrontBuffer");
 689   if (!decoder_) {
 690     LOG(ERROR) << "Can't produce front buffer before initialization.";
 691     return;
 692   }
 693
 694   decoder_->ProduceFrontBuffer(mailbox);
 695 }
 696
 697 void GpuCommandBufferStub::OnParseError() {
 698   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnParseError");
 699   DCHECK(command_buffer_.get());
 700   gpu::CommandBuffer::State state = command_buffer_->GetLastState();
 701   IPC::Message* msg = new GpuCommandBufferMsg_Destroyed(
 702       route_id_, state.context_lost_reason, state.error);
 703   msg->set_unblock(true);
 704   Send(msg);
 705
 706   // Tell the browser about this context loss as well, so it can
 707   // determine whether client APIs like WebGL need to be immediately
 708   // blocked from automatically running.
 709   GpuChannelManager* gpu_channel_manager = channel_->gpu_channel_manager();
 710   gpu_channel_manager->Send(new GpuHostMsg_DidLoseContext(
 711       handle_.is_null(), state.context_lost_reason, active_url_));
 712
 713   CheckContextLost();
 714 }
 715
 716 void GpuCommandBufferStub::OnWaitForTokenInRange(int32 start,
 717                                                  int32 end,
 718                                                  IPC::Message* reply_message) {
 719   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnWaitForTokenInRange");
 720   DCHECK(command_buffer_.get());
 721   CheckContextLost();
 722   if (wait_for_token_)
 723     LOG(ERROR) << "Got WaitForToken command while currently waiting for token.";
 724   wait_for_token_ =
 725       make_scoped_ptr(new WaitForCommandState(start, end, reply_message));
 726   CheckCompleteWaits();
 727 }
 728
 729 void GpuCommandBufferStub::OnWaitForGetOffsetInRange(
 730     int32 start,
 731     int32 end,
 732     IPC::Message* reply_message) {
 733   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnWaitForGetOffsetInRange");
 734   DCHECK(command_buffer_.get());
 735   CheckContextLost();
 736   if (wait_for_get_offset_) {
 737     LOG(ERROR)
 738         << "Got WaitForGetOffset command while currently waiting for offset.";
 739   }
 740   wait_for_get_offset_ =
 741       make_scoped_ptr(new WaitForCommandState(start, end, reply_message));
 742   CheckCompleteWaits();
 743 }
 744
 745 void GpuCommandBufferStub::CheckCompleteWaits() {
 746   if (wait_for_token_ || wait_for_get_offset_) {
 747     gpu::CommandBuffer::State state = command_buffer_->GetLastState();
 748     if (wait_for_token_ &&
 749         (gpu::CommandBuffer::InRange(
 750              wait_for_token_->start, wait_for_token_->end, state.token) ||
 751          state.error != gpu::error::kNoError)) {
 752       ReportState();
 753       GpuCommandBufferMsg_WaitForTokenInRange::WriteReplyParams(
 754           wait_for_token_->reply.get(), state);
 755       Send(wait_for_token_->reply.release());
 756       wait_for_token_.reset();
 757     }
 758     if (wait_for_get_offset_ &&
 759         (gpu::CommandBuffer::InRange(wait_for_get_offset_->start,
 760                                      wait_for_get_offset_->end,
 761                                      state.get_offset) ||
 762          state.error != gpu::error::kNoError)) {
 763       ReportState();
 764       GpuCommandBufferMsg_WaitForGetOffsetInRange::WriteReplyParams(
 765           wait_for_get_offset_->reply.get(), state);
 766       Send(wait_for_get_offset_->reply.release());
 767       wait_for_get_offset_.reset();
 768     }
 769   }
 770 }
 771
 772 void GpuCommandBufferStub::OnAsyncFlush(
 773     int32 put_offset,
 774     uint32 flush_count,
 775     const std::vector<ui::LatencyInfo>& latency_info) {
 776   TRACE_EVENT1(
 777       "gpu", "GpuCommandBufferStub::OnAsyncFlush", "put_offset", put_offset);
 778
 779   if (ui::LatencyInfo::Verify(latency_info,
 780                               "GpuCommandBufferStub::OnAsyncFlush") &&
 781       !latency_info_callback_.is_null()) {
 782     latency_info_callback_.Run(latency_info);
 783   }
 784   DCHECK(command_buffer_.get());
 785   if (flush_count - last_flush_count_ < 0x8000000U) {
 786     last_flush_count_ = flush_count;
 787     command_buffer_->Flush(put_offset);
 788   } else {
 789     // We received this message out-of-order. This should not happen but is here
 790     // to catch regressions. Ignore the message.
 791     NOTREACHED() << "Received a Flush message out-of-order";
 792   }
 793
 794   ReportState();
 795 }
 796
 797 void GpuCommandBufferStub::OnRescheduled() {
 798   gpu::CommandBuffer::State pre_state = command_buffer_->GetLastState();
 799   command_buffer_->Flush(command_buffer_->GetPutOffset());
 800   gpu::CommandBuffer::State post_state = command_buffer_->GetLastState();
 801
 802   if (pre_state.get_offset != post_state.get_offset)
 803     ReportState();
 804 }
 805
 806 void GpuCommandBufferStub::OnRegisterTransferBuffer(
 807     int32 id,
 808     base::SharedMemoryHandle transfer_buffer,
 809     uint32 size) {
 810   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnRegisterTransferBuffer");
 811
 812   // Take ownership of the memory and map it into this process.
 813   // This validates the size.
 814   scoped_ptr<base::SharedMemory> shared_memory(
 815       new base::SharedMemory(transfer_buffer, false));
 816   if (!shared_memory->Map(size)) {
 817     DVLOG(0) << "Failed to map shared memory.";
 818     return;
 819   }
 820
 821   if (command_buffer_) {
 822     command_buffer_->RegisterTransferBuffer(
 823         id, gpu::MakeBackingFromSharedMemory(shared_memory.Pass(), size));
 824   }
 825 }
 826
 827 void GpuCommandBufferStub::OnDestroyTransferBuffer(int32 id) {
 828   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnDestroyTransferBuffer");
 829
 830   if (command_buffer_)
 831     command_buffer_->DestroyTransferBuffer(id);
 832 }
 833
 834 void GpuCommandBufferStub::OnCommandProcessed() {
 835   if (watchdog_)
 836     watchdog_->CheckArmed();
 837 }
 838
 839 void GpuCommandBufferStub::ReportState() { command_buffer_->UpdateState(); }
 840
 841 void GpuCommandBufferStub::PutChanged() {
 842   FastSetActiveURL(active_url_, active_url_hash_);
 843   scheduler_->PutChanged();
 844 }
 845
 846 void GpuCommandBufferStub::OnCreateVideoDecoder(
 847     media::VideoCodecProfile profile,
 848     int32 decoder_route_id,
 849     IPC::Message* reply_message) {
 850   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnCreateVideoDecoder");
 851   GpuVideoDecodeAccelerator* decoder = new GpuVideoDecodeAccelerator(
 852       decoder_route_id, this, channel_->io_task_runner());
 853   decoder->Initialize(profile, reply_message);
 854   // decoder is registered as a DestructionObserver of this stub and will
 855   // self-delete during destruction of this stub.
 856 }
 857
 858 void GpuCommandBufferStub::OnCreateVideoEncoder(
 859     media::VideoPixelFormat input_format,
 860     const gfx::Size& input_visible_size,
 861     media::VideoCodecProfile output_profile,
 862     uint32 initial_bitrate,
 863     int32 encoder_route_id,
 864     IPC::Message* reply_message) {
 865   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnCreateVideoEncoder");
 866   GpuVideoEncodeAccelerator* encoder =
 867       new GpuVideoEncodeAccelerator(encoder_route_id, this);
 868   encoder->Initialize(input_format,
 869                       input_visible_size,
 870                       output_profile,
 871                       initial_bitrate,
 872                       reply_message);
 873   // encoder is registered as a DestructionObserver of this stub and will
 874   // self-delete during destruction of this stub.
 875 }
 876
 877 void GpuCommandBufferStub::OnSetSurfaceVisible(bool visible) {
 878   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnSetSurfaceVisible");
 879   if (memory_manager_client_state_)
 880     memory_manager_client_state_->SetVisible(visible);
 881 }
 882
 883 void GpuCommandBufferStub::AddSyncPoint(uint32 sync_point) {
 884   sync_points_.push_back(sync_point);
 885 }
 886
 887 void GpuCommandBufferStub::OnRetireSyncPoint(uint32 sync_point) {
 888   DCHECK(!sync_points_.empty() && sync_points_.front() == sync_point);
 889   sync_points_.pop_front();
 890
 891   gpu::gles2::MailboxManager* mailbox_manager =
 892       context_group_->mailbox_manager();
 893   if (mailbox_manager->UsesSync() && MakeCurrent())
 894     mailbox_manager->PushTextureUpdates(sync_point);
 895
 896   GpuChannelManager* manager = channel_->gpu_channel_manager();
 897   manager->sync_point_manager()->RetireSyncPoint(sync_point);
 898 }
 899
 900 bool GpuCommandBufferStub::OnWaitSyncPoint(uint32 sync_point) {
 901   if (!sync_point)
 902     return true;
 903   GpuChannelManager* manager = channel_->gpu_channel_manager();
 904   if (manager->sync_point_manager()->IsSyncPointRetired(sync_point)) {
 905     PullTextureUpdates(sync_point);
 906     return true;
 907   }
 908
 909   if (sync_point_wait_count_ == 0) {
 910     TRACE_EVENT_ASYNC_BEGIN1("gpu", "WaitSyncPoint", this,
 911                              "GpuCommandBufferStub", this);
 912   }
 913   scheduler_->SetScheduled(false);
 914   ++sync_point_wait_count_;
 915   manager->sync_point_manager()->AddSyncPointCallback(
 916       sync_point,
 917       base::Bind(&RunOnThread, base::ThreadTaskRunnerHandle::Get(),
 918                  base::Bind(&GpuCommandBufferStub::OnWaitSyncPointCompleted,
 919                             this->AsWeakPtr(), sync_point)));
 920   return scheduler_->IsScheduled();
 921 }
 922
 923 void GpuCommandBufferStub::OnWaitSyncPointCompleted(uint32 sync_point) {
 924   PullTextureUpdates(sync_point);
 925   --sync_point_wait_count_;
 926   if (sync_point_wait_count_ == 0) {
 927     TRACE_EVENT_ASYNC_END1("gpu", "WaitSyncPoint", this,
 928                            "GpuCommandBufferStub", this);
 929   }
 930   scheduler_->SetScheduled(true);
 931 }
 932
 933 void GpuCommandBufferStub::PullTextureUpdates(uint32 sync_point) {
 934   gpu::gles2::MailboxManager* mailbox_manager =
 935       context_group_->mailbox_manager();
 936   if (mailbox_manager->UsesSync() && MakeCurrent())
 937     mailbox_manager->PullTextureUpdates(sync_point);
 938 }
 939
 940 void GpuCommandBufferStub::OnSignalSyncPoint(uint32 sync_point, uint32 id) {
 941   GpuChannelManager* manager = channel_->gpu_channel_manager();
 942   manager->sync_point_manager()->AddSyncPointCallback(
 943       sync_point,
 944       base::Bind(&RunOnThread, base::ThreadTaskRunnerHandle::Get(),
 945                  base::Bind(&GpuCommandBufferStub::OnSignalSyncPointAck,
 946                             this->AsWeakPtr(), id)));
 947 }
 948
 949 void GpuCommandBufferStub::OnSignalSyncPointAck(uint32 id) {
 950   Send(new GpuCommandBufferMsg_SignalSyncPointAck(route_id_, id));
 951 }
 952
 953 void GpuCommandBufferStub::OnSignalQuery(uint32 query_id, uint32 id) {
 954   if (decoder_) {
 955     gpu::gles2::QueryManager* query_manager = decoder_->GetQueryManager();
 956     if (query_manager) {
 957       gpu::gles2::QueryManager::Query* query =
 958           query_manager->GetQuery(query_id);
 959       if (query) {
 960         query->AddCallback(
 961           base::Bind(&GpuCommandBufferStub::OnSignalSyncPointAck,
 962                      this->AsWeakPtr(),
 963                      id));
 964         return;
 965       }
 966     }
 967   }
 968   // Something went wrong, run callback immediately.
 969   OnSignalSyncPointAck(id);
 970 }
 971
 972
 973 void GpuCommandBufferStub::OnSetClientHasMemoryAllocationChangedCallback(
 974     bool has_callback) {
 975   TRACE_EVENT0(
 976       "gpu",
 977       "GpuCommandBufferStub::OnSetClientHasMemoryAllocationChangedCallback");
 978   if (has_callback) {
 979     if (!memory_manager_client_state_) {
 980       memory_manager_client_state_.reset(GetMemoryManager()->CreateClientState(
 981           this, surface_id_ != 0, true));
 982     }
 983   } else {
 984     memory_manager_client_state_.reset();
 985   }
 986 }
 987
 988 void GpuCommandBufferStub::OnCreateImage(int32 id,
 989                                          gfx::GpuMemoryBufferHandle handle,
 990                                          gfx::Size size,
 991                                          gfx::BufferFormat format,
 992                                          uint32 internalformat) {
 993   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnCreateImage");
 994
 995   if (!decoder_)
 996     return;
 997
 998   gpu::gles2::ImageManager* image_manager = decoder_->GetImageManager();
 999   DCHECK(image_manager);
1000   if (image_manager->LookupImage(id)) {
1001     LOG(ERROR) << "Image already exists with same ID.";
1002     return;
1003   }
1004
1005   if (!gpu::ImageFactory::IsGpuMemoryBufferFormatSupported(
1006           format, decoder_->GetCapabilities())) {
1007     LOG(ERROR) << "Format is not supported.";
1008     return;
1009   }
1010
1011   if (!gpu::ImageFactory::IsImageSizeValidForGpuMemoryBufferFormat(size,
1012                                                                    format)) {
1013     LOG(ERROR) << "Invalid image size for format.";
1014     return;
1015   }
1016
1017   if (!gpu::ImageFactory::IsImageFormatCompatibleWithGpuMemoryBufferFormat(
1018           internalformat, format)) {
1019     LOG(ERROR) << "Incompatible image format.";
1020     return;
1021   }
1022
1023   scoped_refptr<gfx::GLImage> image = channel()->CreateImageForGpuMemoryBuffer(
1024       handle, size, format, internalformat);
1025   if (!image.get())
1026     return;
1027
1028   image_manager->AddImage(image.get(), id);
1029 }
1030
1031 void GpuCommandBufferStub::OnDestroyImage(int32 id) {
1032   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnDestroyImage");
1033
1034   if (!decoder_)
1035     return;
1036
1037   gpu::gles2::ImageManager* image_manager = decoder_->GetImageManager();
1038   DCHECK(image_manager);
1039   if (!image_manager->LookupImage(id)) {
1040     LOG(ERROR) << "Image with ID doesn't exist.";
1041     return;
1042   }
1043
1044   image_manager->RemoveImage(id);
1045 }
1046
1047 void GpuCommandBufferStub::SendConsoleMessage(
1048     int32 id,
1049     const std::string& message) {
1050   GPUCommandBufferConsoleMessage console_message;
1051   console_message.id = id;
1052   console_message.message = message;
1053   IPC::Message* msg = new GpuCommandBufferMsg_ConsoleMsg(
1054       route_id_, console_message);
1055   msg->set_unblock(true);
1056   Send(msg);
1057 }
1058
1059 void GpuCommandBufferStub::SendCachedShader(
1060     const std::string& key, const std::string& shader) {
1061   channel_->CacheShader(key, shader);
1062 }
1063
1064 void GpuCommandBufferStub::AddDestructionObserver(
1065     DestructionObserver* observer) {
1066   destruction_observers_.AddObserver(observer);
1067 }
1068
1069 void GpuCommandBufferStub::RemoveDestructionObserver(
1070     DestructionObserver* observer) {
1071   destruction_observers_.RemoveObserver(observer);
1072 }
1073
1074 void GpuCommandBufferStub::SetPreemptByFlag(
1075     scoped_refptr<gpu::PreemptionFlag> flag) {
1076   preemption_flag_ = flag;
1077   if (scheduler_)
1078     scheduler_->SetPreemptByFlag(preemption_flag_);
1079 }
1080
1081 bool GpuCommandBufferStub::GetTotalGpuMemory(uint64* bytes) {
1082   *bytes = total_gpu_memory_;
1083   return !!total_gpu_memory_;
1084 }
1085
1086 gfx::Size GpuCommandBufferStub::GetSurfaceSize() const {
1087   if (!surface_.get())
1088     return gfx::Size();
1089   return surface_->GetSize();
1090 }
1091
1092 const gpu::gles2::FeatureInfo* GpuCommandBufferStub::GetFeatureInfo() const {
1093   return context_group_->feature_info();
1094 }
1095
1096 gpu::gles2::MemoryTracker* GpuCommandBufferStub::GetMemoryTracker() const {
1097   return context_group_->memory_tracker();
1098 }
1099
1100 void GpuCommandBufferStub::SetMemoryAllocation(
1101     const gpu::MemoryAllocation& allocation) {
1102   if (!last_memory_allocation_valid_ ||
1103       !allocation.Equals(last_memory_allocation_)) {
1104     Send(new GpuCommandBufferMsg_SetMemoryAllocation(
1105         route_id_, allocation));
1106   }
1107
1108   last_memory_allocation_valid_ = true;
1109   last_memory_allocation_ = allocation;
1110 }
1111
1112 void GpuCommandBufferStub::SuggestHaveFrontBuffer(
1113     bool suggest_have_frontbuffer) {
1114   // This can be called outside of OnMessageReceived, so the context needs
1115   // to be made current before calling methods on the surface.
1116   if (surface_.get() && MakeCurrent())
1117     surface_->SetFrontbufferAllocation(suggest_have_frontbuffer);
1118 }
1119
1120 bool GpuCommandBufferStub::CheckContextLost() {
1121   DCHECK(command_buffer_);
1122   gpu::CommandBuffer::State state = command_buffer_->GetLastState();
1123   bool was_lost = state.error == gpu::error::kLostContext;
1124
1125   if (was_lost) {
1126     bool was_lost_by_robustness =
1127         decoder_ && decoder_->WasContextLostByRobustnessExtension();
1128
1129     // Work around issues with recovery by allowing a new GPU process to launch.
1130     if ((was_lost_by_robustness ||
1131          context_group_->feature_info()->workarounds().exit_on_context_lost) &&
1132         !base::CommandLine::ForCurrentProcess()->HasSwitch(
1133             switches::kSingleProcess) &&
1134         !base::CommandLine::ForCurrentProcess()->HasSwitch(
1135             switches::kInProcessGPU)) {
1136       LOG(ERROR) << "Exiting GPU process because some drivers cannot recover"
1137                  << " from problems.";
1138 #if defined(OS_WIN)
1139       base::win::SetShouldCrashOnProcessDetach(false);
1140 #endif
1141       exit(0);
1142     }
1143
1144     // Lose all other contexts if the reset was triggered by the robustness
1145     // extension instead of being synthetic.
1146     if (was_lost_by_robustness &&
1147         (gfx::GLContext::LosesAllContextsOnContextLost() ||
1148          use_virtualized_gl_context_)) {
1149       channel_->LoseAllContexts();
1150     }
1151   }
1152
1153   CheckCompleteWaits();
1154   return was_lost;
1155 }
1156
1157 void GpuCommandBufferStub::MarkContextLost() {
1158   if (!command_buffer_ ||
1159       command_buffer_->GetLastState().error == gpu::error::kLostContext)
1160     return;
1161
1162   command_buffer_->SetContextLostReason(gpu::error::kUnknown);
1163   if (decoder_)
1164     decoder_->MarkContextLost(gpu::error::kUnknown);
1165   command_buffer_->SetParseError(gpu::error::kLostContext);
1166 }
1167
1168 void GpuCommandBufferStub::SendSwapBuffersCompleted(
1169     const std::vector<ui::LatencyInfo>& latency_info,
1170     gfx::SwapResult result) {
1171   Send(new GpuCommandBufferMsg_SwapBuffersCompleted(route_id_, latency_info,
1172                                                     result));
1173 }
1174
1175 void GpuCommandBufferStub::SendUpdateVSyncParameters(base::TimeTicks timebase,
1176                                                      base::TimeDelta interval) {
1177   Send(new GpuCommandBufferMsg_UpdateVSyncParameters(route_id_, timebase,
1178                                                      interval));
1179 }
1180
1181 }  // namespace content