content/gpu/gpu_child_thread.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 "content/gpu/gpu_child_thread.h"
   6
   7 #include "base/bind.h"
   8 #include "base/lazy_instance.h"
   9 #include "base/threading/worker_pool.h"
  10 #include "build/build_config.h"
  11 #include "content/child/child_process.h"
  12 #include "content/child/thread_safe_sender.h"
  13 #include "content/common/gpu/gpu_messages.h"
  14 #include "content/gpu/gpu_watchdog_thread.h"
  15 #include "content/public/common/content_client.h"
  16 #include "content/public/common/content_switches.h"
  17 #include "gpu/config/gpu_info_collector.h"
  18 #include "ipc/ipc_channel_handle.h"
  19 #include "ipc/ipc_sync_message_filter.h"
  20 #include "ui/gl/gl_implementation.h"
  21
  22 namespace content {
  23 namespace {
  24
  25 static base::LazyInstance<scoped_refptr<ThreadSafeSender> >
  26     g_thread_safe_sender = LAZY_INSTANCE_INITIALIZER;
  27
  28 bool GpuProcessLogMessageHandler(int severity,
  29                                  const char* file, int line,
  30                                  size_t message_start,
  31                                  const std::string& str) {
  32   std::string header = str.substr(0, message_start);
  33   std::string message = str.substr(message_start);
  34
  35   g_thread_safe_sender.Get()->Send(new GpuHostMsg_OnLogMessage(
  36       severity, header, message));
  37
  38   return false;
  39 }
  40
  41 }  // namespace
  42
  43 GpuChildThread::GpuChildThread(GpuWatchdogThread* watchdog_thread,
  44                                bool dead_on_arrival,
  45                                const gpu::GPUInfo& gpu_info,
  46                                const DeferredMessages& deferred_messages)
  47     : dead_on_arrival_(dead_on_arrival),
  48       gpu_info_(gpu_info),
  49       deferred_messages_(deferred_messages),
  50       in_browser_process_(false) {
  51   watchdog_thread_ = watchdog_thread;
  52 #if defined(OS_WIN)
  53   target_services_ = NULL;
  54 #endif
  55   g_thread_safe_sender.Get() = thread_safe_sender();
  56 }
  57
  58 GpuChildThread::GpuChildThread(const std::string& channel_id)
  59     : ChildThread(channel_id),
  60       dead_on_arrival_(false),
  61       in_browser_process_(true) {
  62 #if defined(OS_WIN)
  63   target_services_ = NULL;
  64 #endif
  65   DCHECK(
  66       CommandLine::ForCurrentProcess()->HasSwitch(switches::kSingleProcess) ||
  67       CommandLine::ForCurrentProcess()->HasSwitch(switches::kInProcessGPU));
  68   // For single process and in-process GPU mode, we need to load and
  69   // initialize the GL implementation and locate the GL entry points here.
  70   if (!gfx::GLSurface::InitializeOneOff()) {
  71     VLOG(1) << "gfx::GLSurface::InitializeOneOff()";
  72   }
  73   g_thread_safe_sender.Get() = thread_safe_sender();
  74 }
  75
  76 GpuChildThread::~GpuChildThread() {
  77 }
  78
  79 void GpuChildThread::Shutdown() {
  80   logging::SetLogMessageHandler(NULL);
  81 }
  82
  83 void GpuChildThread::Init(const base::Time& process_start_time) {
  84   process_start_time_ = process_start_time;
  85 }
  86
  87 bool GpuChildThread::Send(IPC::Message* msg) {
  88   // The GPU process must never send a synchronous IPC message to the browser
  89   // process. This could result in deadlock.
  90   DCHECK(!msg->is_sync());
  91
  92   return ChildThread::Send(msg);
  93 }
  94
  95 bool GpuChildThread::OnControlMessageReceived(const IPC::Message& msg) {
  96   bool msg_is_ok = true;
  97   bool handled = true;
  98   IPC_BEGIN_MESSAGE_MAP_EX(GpuChildThread, msg, msg_is_ok)
  99     IPC_MESSAGE_HANDLER(GpuMsg_Initialize, OnInitialize)
 100     IPC_MESSAGE_HANDLER(GpuMsg_CollectGraphicsInfo, OnCollectGraphicsInfo)
 101     IPC_MESSAGE_HANDLER(GpuMsg_GetVideoMemoryUsageStats,
 102                         OnGetVideoMemoryUsageStats)
 103     IPC_MESSAGE_HANDLER(GpuMsg_Clean, OnClean)
 104     IPC_MESSAGE_HANDLER(GpuMsg_Crash, OnCrash)
 105     IPC_MESSAGE_HANDLER(GpuMsg_Hang, OnHang)
 106     IPC_MESSAGE_HANDLER(GpuMsg_DisableWatchdog, OnDisableWatchdog)
 107     IPC_MESSAGE_UNHANDLED(handled = false)
 108   IPC_END_MESSAGE_MAP_EX()
 109
 110   if (handled)
 111     return true;
 112
 113   return gpu_channel_manager_.get() &&
 114       gpu_channel_manager_->OnMessageReceived(msg);
 115 }
 116
 117 void GpuChildThread::OnInitialize() {
 118   Send(new GpuHostMsg_Initialized(!dead_on_arrival_, gpu_info_));
 119   while (!deferred_messages_.empty()) {
 120     Send(deferred_messages_.front());
 121     deferred_messages_.pop();
 122   }
 123
 124   if (dead_on_arrival_) {
 125     VLOG(1) << "Exiting GPU process due to errors during initialization";
 126     base::MessageLoop::current()->Quit();
 127     return;
 128   }
 129
 130 #if defined(OS_ANDROID)
 131   base::PlatformThread::SetThreadPriority(
 132       base::PlatformThread::CurrentHandle(),
 133       base::kThreadPriority_Display);
 134 #endif
 135
 136   // We don't need to pipe log messages if we are running the GPU thread in
 137   // the browser process.
 138   if (!in_browser_process_)
 139     logging::SetLogMessageHandler(GpuProcessLogMessageHandler);
 140
 141   // Record initialization only after collecting the GPU info because that can
 142   // take a significant amount of time.
 143   gpu_info_.initialization_time = base::Time::Now() - process_start_time_;
 144
 145   // Defer creation of the render thread. This is to prevent it from handling
 146   // IPC messages before the sandbox has been enabled and all other necessary
 147   // initialization has succeeded.
 148   gpu_channel_manager_.reset(
 149       new GpuChannelManager(this,
 150                             watchdog_thread_.get(),
 151                             ChildProcess::current()->io_message_loop_proxy(),
 152                             ChildProcess::current()->GetShutDownEvent()));
 153
 154   // Ensure the browser process receives the GPU info before a reply to any
 155   // subsequent IPC it might send.
 156   if (!in_browser_process_)
 157     Send(new GpuHostMsg_GraphicsInfoCollected(gpu_info_));
 158 }
 159
 160 void GpuChildThread::StopWatchdog() {
 161   if (watchdog_thread_.get()) {
 162     watchdog_thread_->Stop();
 163   }
 164 }
 165
 166 void GpuChildThread::OnCollectGraphicsInfo() {
 167 #if defined(OS_WIN)
 168   // GPU full info collection should only happen on un-sandboxed GPU process
 169   // or single process/in-process gpu mode on Windows.
 170   CommandLine* command_line = CommandLine::ForCurrentProcess();
 171   DCHECK(command_line->HasSwitch(switches::kDisableGpuSandbox) ||
 172          in_browser_process_);
 173 #endif  // OS_WIN
 174
 175   if (!gpu::CollectContextGraphicsInfo(&gpu_info_))
 176     VLOG(1) << "gpu::CollectGraphicsInfo failed";
 177   GetContentClient()->SetGpuInfo(gpu_info_);
 178
 179 #if defined(OS_WIN)
 180   // This is slow, but it's the only thing the unsandboxed GPU process does,
 181   // and GpuDataManager prevents us from sending multiple collecting requests,
 182   // so it's OK to be blocking.
 183   gpu::GetDxDiagnostics(&gpu_info_.dx_diagnostics);
 184   gpu_info_.finalized = true;
 185 #endif  // OS_WIN
 186
 187   Send(new GpuHostMsg_GraphicsInfoCollected(gpu_info_));
 188
 189 #if defined(OS_WIN)
 190   if (!in_browser_process_) {
 191     // The unsandboxed GPU process fulfilled its duty.  Rest in peace.
 192     base::MessageLoop::current()->Quit();
 193   }
 194 #endif  // OS_WIN
 195 }
 196
 197 void GpuChildThread::OnGetVideoMemoryUsageStats() {
 198   GPUVideoMemoryUsageStats video_memory_usage_stats;
 199   if (gpu_channel_manager_)
 200     gpu_channel_manager_->gpu_memory_manager()->GetVideoMemoryUsageStats(
 201         &video_memory_usage_stats);
 202   Send(new GpuHostMsg_VideoMemoryUsageStats(video_memory_usage_stats));
 203 }
 204
 205 void GpuChildThread::OnClean() {
 206   VLOG(1) << "GPU: Removing all contexts";
 207   if (gpu_channel_manager_)
 208     gpu_channel_manager_->LoseAllContexts();
 209 }
 210
 211 void GpuChildThread::OnCrash() {
 212   VLOG(1) << "GPU: Simulating GPU crash";
 213   // Good bye, cruel world.
 214   volatile int* it_s_the_end_of_the_world_as_we_know_it = NULL;
 215   *it_s_the_end_of_the_world_as_we_know_it = 0xdead;
 216 }
 217
 218 void GpuChildThread::OnHang() {
 219   VLOG(1) << "GPU: Simulating GPU hang";
 220   for (;;) {
 221     // Do not sleep here. The GPU watchdog timer tracks the amount of user
 222     // time this thread is using and it doesn't use much while calling Sleep.
 223   }
 224 }
 225
 226 void GpuChildThread::OnDisableWatchdog() {
 227   VLOG(1) << "GPU: Disabling watchdog thread";
 228   if (watchdog_thread_.get()) {
 229     // Disarm the watchdog before shutting down the message loop. This prevents
 230     // the future posting of tasks to the message loop.
 231     if (watchdog_thread_->message_loop())
 232       watchdog_thread_->PostAcknowledge();
 233     // Prevent rearming.
 234     watchdog_thread_->Stop();
 235   }
 236 }
 237
 238 }  // namespace content
 239