src/content/gpu/gpu_main.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 <stdlib.h>
   6
   7 #if defined(OS_WIN)
   8 #include <dwmapi.h>
   9 #include <windows.h>
  10 #endif
  11
  12 #include "base/debug/trace_event.h"
  13 #include "base/lazy_instance.h"
  14 #include "base/message_loop/message_loop.h"
  15 #include "base/metrics/histogram.h"
  16 #include "base/rand_util.h"
  17 #include "base/strings/string_number_conversions.h"
  18 #include "base/strings/stringprintf.h"
  19 #include "base/threading/platform_thread.h"
  20 #include "build/build_config.h"
  21 #include "content/child/child_process.h"
  22 #include "content/common/content_constants_internal.h"
  23 #include "content/common/gpu/gpu_config.h"
  24 #include "content/common/gpu/gpu_messages.h"
  25 #include "content/common/sandbox_linux/sandbox_linux.h"
  26 #include "content/gpu/gpu_child_thread.h"
  27 #include "content/gpu/gpu_process.h"
  28 #include "content/gpu/gpu_watchdog_thread.h"
  29 #include "content/public/common/content_client.h"
  30 #include "content/public/common/content_switches.h"
  31 #include "content/public/common/main_function_params.h"
  32 #include "crypto/hmac.h"
  33 #include "gpu/command_buffer/service/gpu_switches.h"
  34 #include "gpu/config/gpu_info_collector.h"
  35 #include "gpu/config/gpu_util.h"
  36 #include "ui/gl/gl_implementation.h"
  37 #include "ui/gl/gl_surface.h"
  38 #include "ui/gl/gl_switches.h"
  39 #include "ui/gl/gpu_switching_manager.h"
  40
  41 #if defined(OS_WIN)
  42 #include "base/win/windows_version.h"
  43 #include "base/win/scoped_com_initializer.h"
  44 #include "sandbox/win/src/sandbox.h"
  45 #endif
  46
  47 #if defined(USE_X11)
  48 #include "ui/base/x/x11_util.h"
  49 #endif
  50
  51 #if defined(OS_LINUX)
  52 #include "content/public/common/sandbox_init.h"
  53 #endif
  54
  55 const int kGpuTimeout = 10000;
  56
  57 namespace content {
  58
  59 namespace {
  60
  61 bool WarmUpSandbox(const CommandLine& command_line);
  62 #if defined(OS_LINUX)
  63 bool StartSandboxLinux(const gpu::GPUInfo&, GpuWatchdogThread*, bool);
  64 #elif defined(OS_WIN)
  65 bool StartSandboxWindows(const sandbox::SandboxInterfaceInfo*);
  66 #endif
  67
  68 base::LazyInstance<GpuChildThread::DeferredMessages> deferred_messages =
  69     LAZY_INSTANCE_INITIALIZER;
  70
  71 bool GpuProcessLogMessageHandler(int severity,
  72                                  const char* file, int line,
  73                                  size_t message_start,
  74                                  const std::string& str) {
  75   std::string header = str.substr(0, message_start);
  76   std::string message = str.substr(message_start);
  77   deferred_messages.Get().push(new GpuHostMsg_OnLogMessage(
  78       severity, header, message));
  79   return false;
  80 }
  81
  82 }  // namespace anonymous
  83
  84 // Main function for starting the Gpu process.
  85 int GpuMain(const MainFunctionParams& parameters) {
  86   TRACE_EVENT0("gpu", "GpuMain");
  87   base::debug::TraceLog::GetInstance()->SetProcessName("GPU Process");
  88   base::debug::TraceLog::GetInstance()->SetProcessSortIndex(
  89       kTraceEventGpuProcessSortIndex);
  90
  91   const CommandLine& command_line = parameters.command_line;
  92   if (command_line.HasSwitch(switches::kGpuStartupDialog)) {
  93     ChildProcess::WaitForDebugger("Gpu");
  94   }
  95
  96   base::Time start_time = base::Time::Now();
  97
  98 #if defined(OS_WIN)
  99   // Prevent Windows from displaying a modal dialog on failures like not being
 100   // able to load a DLL.
 101   SetErrorMode(
 102       SEM_FAILCRITICALERRORS |
 103       SEM_NOGPFAULTERRORBOX |
 104       SEM_NOOPENFILEERRORBOX);
 105 #elif defined(USE_X11)
 106   ui::SetDefaultX11ErrorHandlers();
 107 #endif
 108
 109   logging::SetLogMessageHandler(GpuProcessLogMessageHandler);
 110
 111   if (command_line.HasSwitch(switches::kSupportsDualGpus)) {
 112     std::string types = command_line.GetSwitchValueASCII(
 113         switches::kGpuDriverBugWorkarounds);
 114     std::set<int> workarounds;
 115     gpu::StringToFeatureSet(types, &workarounds);
 116     if (workarounds.count(gpu::FORCE_DISCRETE_GPU) == 1)
 117       ui::GpuSwitchingManager::GetInstance()->ForceUseOfDiscreteGpu();
 118     else if (workarounds.count(gpu::FORCE_INTEGRATED_GPU) == 1)
 119       ui::GpuSwitchingManager::GetInstance()->ForceUseOfIntegratedGpu();
 120   }
 121
 122   // Initialization of the OpenGL bindings may fail, in which case we
 123   // will need to tear down this process. However, we can not do so
 124   // safely until the IPC channel is set up, because the detection of
 125   // early return of a child process is implemented using an IPC
 126   // channel error. If the IPC channel is not fully set up between the
 127   // browser and GPU process, and the GPU process crashes or exits
 128   // early, the browser process will never detect it.  For this reason
 129   // we defer tearing down the GPU process until receiving the
 130   // GpuMsg_Initialize message from the browser.
 131   bool dead_on_arrival = false;
 132
 133   base::MessageLoop::Type message_loop_type = base::MessageLoop::TYPE_IO;
 134 #if defined(OS_WIN)
 135   // Unless we're running on desktop GL, we don't need a UI message
 136   // loop, so avoid its use to work around apparent problems with some
 137   // third-party software.
 138   if (command_line.HasSwitch(switches::kUseGL) &&
 139       command_line.GetSwitchValueASCII(switches::kUseGL) ==
 140           gfx::kGLImplementationDesktopName) {
 141     message_loop_type = base::MessageLoop::TYPE_UI;
 142   }
 143 #elif defined(TOOLKIT_GTK)
 144   message_loop_type = base::MessageLoop::TYPE_GPU;
 145 #elif defined(OS_LINUX)
 146   message_loop_type = base::MessageLoop::TYPE_DEFAULT;
 147 #endif
 148
 149   base::MessageLoop main_message_loop(message_loop_type);
 150   base::PlatformThread::SetName("CrGpuMain");
 151
 152   // In addition to disabling the watchdog if the command line switch is
 153   // present, disable the watchdog on valgrind because the code is expected
 154   // to run slowly in that case.
 155   bool enable_watchdog =
 156       !command_line.HasSwitch(switches::kDisableGpuWatchdog) &&
 157       !RunningOnValgrind();
 158
 159   // Disable the watchdog in debug builds because they tend to only be run by
 160   // developers who will not appreciate the watchdog killing the GPU process.
 161 #ifndef NDEBUG
 162   enable_watchdog = false;
 163 #endif
 164
 165   bool delayed_watchdog_enable = false;
 166
 167 #if defined(OS_CHROMEOS)
 168   // Don't start watchdog immediately, to allow developers to switch to VT2 on
 169   // startup.
 170   delayed_watchdog_enable = true;
 171 #endif
 172
 173   scoped_refptr<GpuWatchdogThread> watchdog_thread;
 174
 175   // Start the GPU watchdog only after anything that is expected to be time
 176   // consuming has completed, otherwise the process is liable to be aborted.
 177   if (enable_watchdog && !delayed_watchdog_enable) {
 178     watchdog_thread = new GpuWatchdogThread(kGpuTimeout);
 179     watchdog_thread->Start();
 180   }
 181
 182   gpu::GPUInfo gpu_info;
 183   // Get vendor_id, device_id, driver_version from browser process through
 184   // commandline switches.
 185   DCHECK(command_line.HasSwitch(switches::kGpuVendorID) &&
 186          command_line.HasSwitch(switches::kGpuDeviceID) &&
 187          command_line.HasSwitch(switches::kGpuDriverVersion));
 188   bool success = base::HexStringToUInt(
 189       command_line.GetSwitchValueASCII(switches::kGpuVendorID),
 190       &gpu_info.gpu.vendor_id);
 191   DCHECK(success);
 192   success = base::HexStringToUInt(
 193       command_line.GetSwitchValueASCII(switches::kGpuDeviceID),
 194       &gpu_info.gpu.device_id);
 195   DCHECK(success);
 196   gpu_info.driver_vendor =
 197       command_line.GetSwitchValueASCII(switches::kGpuDriverVendor);
 198   gpu_info.driver_version =
 199       command_line.GetSwitchValueASCII(switches::kGpuDriverVersion);
 200   GetContentClient()->SetGpuInfo(gpu_info);
 201
 202   base::TimeDelta collect_context_time;
 203   base::TimeDelta initialize_one_off_time;
 204
 205   // Warm up resources that don't need access to GPUInfo.
 206   if (WarmUpSandbox(command_line)) {
 207 #if defined(OS_LINUX)
 208     bool initialized_sandbox = false;
 209     bool initialized_gl_context = false;
 210     bool should_initialize_gl_context = false;
 211 #if defined(OS_CHROMEOS) && defined(ARCH_CPU_ARMEL)
 212     // On Chrome OS ARM, GPU driver userspace creates threads when initializing
 213     // a GL context, so start the sandbox early.
 214     gpu_info.sandboxed = StartSandboxLinux(gpu_info, watchdog_thread.get(),
 215                                            should_initialize_gl_context);
 216     initialized_sandbox = true;
 217 #endif
 218 #endif  // defined(OS_LINUX)
 219
 220     base::TimeTicks before_initialize_one_off = base::TimeTicks::Now();
 221
 222     // Load and initialize the GL implementation and locate the GL entry points.
 223     if (gfx::GLSurface::InitializeOneOff()) {
 224       // We need to collect GL strings (VENDOR, RENDERER) for blacklisting
 225       // purposes. However, on Mac we don't actually use them. As documented in
 226       // crbug.com/222934, due to some driver issues, glGetString could take
 227       // multiple seconds to finish, which in turn cause the GPU process to
 228       // crash.
 229       // By skipping the following code on Mac, we don't really lose anything,
 230       // because the basic GPU information is passed down from browser process
 231       // and we already registered them through SetGpuInfo() above.
 232       base::TimeTicks before_collect_context_graphics_info =
 233           base::TimeTicks::Now();
 234 #if !defined(OS_MACOSX)
 235       if (!gpu::CollectContextGraphicsInfo(&gpu_info))
 236         VLOG(1) << "gpu::CollectGraphicsInfo failed";
 237       GetContentClient()->SetGpuInfo(gpu_info);
 238
 239 #if defined(OS_CHROMEOS) || defined(OS_ANDROID)
 240       // Recompute gpu driver bug workarounds - this is specifically useful
 241       // on systems where vendor_id/device_id aren't available.
 242       if (!command_line.HasSwitch(switches::kDisableGpuDriverBugWorkarounds)) {
 243         gpu::ApplyGpuDriverBugWorkarounds(
 244             gpu_info, const_cast<CommandLine*>(&command_line));
 245       }
 246 #endif
 247
 248 #if defined(OS_LINUX)
 249       initialized_gl_context = true;
 250 #if !defined(OS_CHROMEOS)
 251       if (gpu_info.gpu.vendor_id == 0x10de &&  // NVIDIA
 252           gpu_info.driver_vendor == "NVIDIA") {
 253         base::ThreadRestrictions::AssertIOAllowed();
 254         if (access("/dev/nvidiactl", R_OK) != 0) {
 255           VLOG(1) << "NVIDIA device file /dev/nvidiactl access denied";
 256           dead_on_arrival = true;
 257         }
 258       }
 259 #endif  // !defined(OS_CHROMEOS)
 260 #endif  // defined(OS_LINUX)
 261 #endif  // !defined(OS_MACOSX)
 262       collect_context_time =
 263           base::TimeTicks::Now() - before_collect_context_graphics_info;
 264     } else {
 265       VLOG(1) << "gfx::GLSurface::InitializeOneOff failed";
 266       dead_on_arrival = true;
 267     }
 268
 269     initialize_one_off_time =
 270         base::TimeTicks::Now() - before_initialize_one_off;
 271
 272     if (enable_watchdog && delayed_watchdog_enable) {
 273       watchdog_thread = new GpuWatchdogThread(kGpuTimeout);
 274       watchdog_thread->Start();
 275     }
 276
 277     // OSMesa is expected to run very slowly, so disable the watchdog in that
 278     // case.
 279     if (enable_watchdog &&
 280         gfx::GetGLImplementation() == gfx::kGLImplementationOSMesaGL) {
 281       watchdog_thread->Stop();
 282       watchdog_thread = NULL;
 283     }
 284
 285 #if defined(OS_LINUX)
 286     should_initialize_gl_context = !initialized_gl_context &&
 287                                    !dead_on_arrival;
 288
 289     if (!initialized_sandbox) {
 290       gpu_info.sandboxed = StartSandboxLinux(gpu_info, watchdog_thread.get(),
 291                                              should_initialize_gl_context);
 292     }
 293 #elif defined(OS_WIN)
 294     gpu_info.sandboxed = StartSandboxWindows(parameters.sandbox_info);
 295 #endif
 296   } else {
 297     dead_on_arrival = true;
 298   }
 299
 300   logging::SetLogMessageHandler(NULL);
 301
 302   GpuProcess gpu_process;
 303
 304   // These UMA must be stored after GpuProcess is constructed as it
 305   // initializes StatisticsRecorder which tracks the histograms.
 306   UMA_HISTOGRAM_TIMES("GPU.CollectContextGraphicsInfo", collect_context_time);
 307   UMA_HISTOGRAM_TIMES("GPU.InitializeOneOffTime", initialize_one_off_time);
 308
 309   GpuChildThread* child_thread = new GpuChildThread(watchdog_thread.get(),
 310                                                     dead_on_arrival,
 311                                                     gpu_info,
 312                                                     deferred_messages.Get());
 313   while (!deferred_messages.Get().empty())
 314     deferred_messages.Get().pop();
 315
 316   child_thread->Init(start_time);
 317
 318   gpu_process.set_main_thread(child_thread);
 319
 320   if (watchdog_thread)
 321     watchdog_thread->AddPowerObserver();
 322
 323   {
 324     TRACE_EVENT0("gpu", "Run Message Loop");
 325     main_message_loop.Run();
 326   }
 327
 328   child_thread->StopWatchdog();
 329
 330   return 0;
 331 }
 332
 333 namespace {
 334
 335 #if defined(OS_LINUX)
 336 void CreateDummyGlContext() {
 337   scoped_refptr<gfx::GLSurface> surface(
 338       gfx::GLSurface::CreateOffscreenGLSurface(gfx::Size(1, 1)));
 339   if (!surface.get()) {
 340     VLOG(1) << "gfx::GLSurface::CreateOffscreenGLSurface failed";
 341     return;
 342   }
 343
 344   // On Linux, this is needed to make sure /dev/nvidiactl has
 345   // been opened and its descriptor cached.
 346   scoped_refptr<gfx::GLContext> context(gfx::GLContext::CreateGLContext(
 347       NULL, surface.get(), gfx::PreferDiscreteGpu));
 348   if (!context.get()) {
 349     VLOG(1) << "gfx::GLContext::CreateGLContext failed";
 350     return;
 351   }
 352
 353   // Similarly, this is needed for /dev/nvidia0.
 354   if (context->MakeCurrent(surface.get())) {
 355     context->ReleaseCurrent(surface.get());
 356   } else {
 357     VLOG(1)  << "gfx::GLContext::MakeCurrent failed";
 358   }
 359 }
 360 #endif
 361
 362 bool WarmUpSandbox(const CommandLine& command_line) {
 363   {
 364     TRACE_EVENT0("gpu", "Warm up rand");
 365     // Warm up the random subsystem, which needs to be done pre-sandbox on all
 366     // platforms.
 367     (void) base::RandUint64();
 368   }
 369   {
 370     TRACE_EVENT0("gpu", "Warm up HMAC");
 371     // Warm up the crypto subsystem, which needs to done pre-sandbox on all
 372     // platforms.
 373     crypto::HMAC hmac(crypto::HMAC::SHA256);
 374     unsigned char key = '\0';
 375     if (!hmac.Init(&key, sizeof(key))) {
 376       LOG(ERROR) << "WarmUpSandbox() failed with crypto::HMAC::Init()";
 377       return false;
 378     }
 379   }
 380
 381   return true;
 382 }
 383
 384 #if defined(OS_LINUX)
 385 void WarmUpSandboxNvidia(const gpu::GPUInfo& gpu_info,
 386                          bool should_initialize_gl_context) {
 387   // We special case Optimus since the vendor_id we see may not be Nvidia.
 388   bool uses_nvidia_driver = (gpu_info.gpu.vendor_id == 0x10de &&  // NVIDIA.
 389                              gpu_info.driver_vendor == "NVIDIA") ||
 390                             gpu_info.optimus;
 391   if (uses_nvidia_driver && should_initialize_gl_context) {
 392     // We need this on Nvidia to pre-open /dev/nvidiactl and /dev/nvidia0.
 393     CreateDummyGlContext();
 394   }
 395 }
 396
 397 bool StartSandboxLinux(const gpu::GPUInfo& gpu_info,
 398                        GpuWatchdogThread* watchdog_thread,
 399                        bool should_initialize_gl_context) {
 400   TRACE_EVENT0("gpu", "Initialize sandbox");
 401
 402   bool res = false;
 403
 404   WarmUpSandboxNvidia(gpu_info, should_initialize_gl_context);
 405
 406   if (watchdog_thread)
 407     watchdog_thread->Stop();
 408   // LinuxSandbox::InitializeSandbox() must always be called
 409   // with only one thread.
 410   res = LinuxSandbox::InitializeSandbox();
 411   if (watchdog_thread)
 412     watchdog_thread->Start();
 413
 414   return res;
 415 }
 416 #endif  // defined(OS_LINUX)
 417
 418 #if defined(OS_WIN)
 419 bool StartSandboxWindows(const sandbox::SandboxInterfaceInfo* sandbox_info) {
 420   TRACE_EVENT0("gpu", "Lower token");
 421
 422   // For Windows, if the target_services interface is not zero, the process
 423   // is sandboxed and we must call LowerToken() before rendering untrusted
 424   // content.
 425   sandbox::TargetServices* target_services = sandbox_info->target_services;
 426   if (target_services) {
 427     target_services->LowerToken();
 428     return true;
 429   }
 430
 431   return false;
 432 }
 433 #endif  // defined(OS_WIN)
 434
 435 }  // namespace.
 436
 437 }  // namespace content