content/gpu/gpu_main.cc

// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <stddef.h>
#include <stdlib.h>

#include <memory>
#include <utility>

#include "base/lazy_instance.h"
#include "base/message_loop/message_loop.h"
#include "base/metrics/histogram.h"
#include "base/metrics/statistics_recorder.h"
#include "base/rand_util.h"
#include "base/run_loop.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/stringprintf.h"
#include "base/third_party/dynamic_annotations/dynamic_annotations.h"
#include "base/threading/platform_thread.h"
#include "base/trace_event/trace_event.h"
#include "build/build_config.h"
#include "content/child/child_process.h"
#include "content/common/content_constants_internal.h"
#include "content/common/gpu_host_messages.h"
#include "content/common/sandbox_linux/sandbox_linux.h"
#include "content/gpu/gpu_child_thread.h"
#include "content/gpu/gpu_process.h"
#include "content/public/common/content_client.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/main_function_params.h"
#include "gpu/command_buffer/service/gpu_switches.h"
#include "gpu/config/gpu_info_collector.h"
#include "gpu/config/gpu_switches.h"
#include "gpu/config/gpu_util.h"
#include "gpu/ipc/common/gpu_memory_buffer_support.h"
#include "gpu/ipc/service/gpu_config.h"
#include "gpu/ipc/service/gpu_memory_buffer_factory.h"
#include "gpu/ipc/service/gpu_watchdog_thread.h"
#include "ui/events/platform/platform_event_source.h"
#include "ui/gl/gl_context.h"
#include "ui/gl/gl_implementation.h"
#include "ui/gl/gl_surface.h"
#include "ui/gl/gl_switches.h"
#include "ui/gl/gpu_switching_manager.h"
#include "ui/gl/init/gl_factory.h"

#if defined(OS_WIN)
#include <windows.h>
#include <dwmapi.h>
#endif

#if defined(OS_ANDROID)
#include "base/trace_event/memory_dump_manager.h"
#include "components/tracing/common/graphics_memory_dump_provider_android.h"
#endif

#if defined(OS_WIN)
#include "base/win/scoped_com_initializer.h"
#include "base/win/windows_version.h"
#include "media/gpu/dxva_video_decode_accelerator_win.h"
#include "media/gpu/media_foundation_video_encode_accelerator_win.h"
#include "sandbox/win/src/sandbox.h"
#endif

#if defined(USE_X11)
#include "ui/base/x/x11_util.h"     // nogncheck
#include "ui/gfx/x/x11_switches.h"  // nogncheck
#endif

#if defined(OS_LINUX)
#include "content/public/common/sandbox_init.h"
#endif

#if defined(OS_MACOSX)
#include "base/message_loop/message_pump_mac.h"
#include "content/common/sandbox_mac.h"
#endif

#if defined(OS_CHROMEOS) && defined(ARCH_CPU_X86_FAMILY)
#include "media/gpu/vaapi_wrapper.h"
#endif

#if defined(SANITIZER_COVERAGE)
#include <sanitizer/common_interface_defs.h>
#include <sanitizer/coverage_interface.h>
#endif

namespace content {

namespace {

void GetGpuInfoFromCommandLine(gpu::GPUInfo& gpu_info,
                               const base::CommandLine& command_line);
void WarmUpSandbox();

#if !defined(OS_MACOSX)
bool CollectGraphicsInfo(gpu::GPUInfo& gpu_info);
#endif

#if defined(OS_LINUX)
#if !defined(OS_CHROMEOS)
bool CanAccessNvidiaDeviceFile();
#endif
bool StartSandboxLinux(const gpu::GPUInfo&, gpu::GpuWatchdogThread*);
#elif defined(OS_WIN)
bool StartSandboxWindows(const sandbox::SandboxInterfaceInfo*);
#endif

base::LazyInstance<GpuChildThread::DeferredMessages> deferred_messages =
    LAZY_INSTANCE_INITIALIZER;

bool GpuProcessLogMessageHandler(int severity,
                                 const char* file, int line,
                                 size_t message_start,
                                 const std::string& str) {
  std::string header = str.substr(0, message_start);
  std::string message = str.substr(message_start);
  deferred_messages.Get().push(
      new GpuHostMsg_OnLogMessage(severity, header, message));
  return false;
}

}  // namespace anonymous

// Main function for starting the Gpu process.
int GpuMain(const MainFunctionParams& parameters) {
  TRACE_EVENT0("gpu", "GpuMain");
  base::trace_event::TraceLog::GetInstance()->SetProcessName("GPU Process");
  base::trace_event::TraceLog::GetInstance()->SetProcessSortIndex(
      kTraceEventGpuProcessSortIndex);

  const base::CommandLine& command_line = parameters.command_line;
  if (command_line.HasSwitch(switches::kGpuStartupDialog)) {
    ChildProcess::WaitForDebugger("Gpu");
  }

  base::Time start_time = base::Time::Now();

#if defined(OS_WIN)
  // Prevent Windows from displaying a modal dialog on failures like not being
  // able to load a DLL.
  SetErrorMode(
      SEM_FAILCRITICALERRORS |
      SEM_NOGPFAULTERRORBOX |
      SEM_NOOPENFILEERRORBOX);
#elif defined(USE_X11)
  ui::SetDefaultX11ErrorHandlers();

#if !defined(OS_CHROMEOS)
  DCHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
      switches::kWindowDepth));
  DCHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
      switches::kX11VisualID));
#endif

#endif

  logging::SetLogMessageHandler(GpuProcessLogMessageHandler);

  if (command_line.HasSwitch(switches::kSupportsDualGpus)) {
    std::string types = command_line.GetSwitchValueASCII(
        switches::kGpuDriverBugWorkarounds);
    std::set<int> workarounds;
    gpu::StringToFeatureSet(types, &workarounds);
    if (workarounds.count(gpu::FORCE_DISCRETE_GPU) == 1)
      ui::GpuSwitchingManager::GetInstance()->ForceUseOfDiscreteGpu();
    else if (workarounds.count(gpu::FORCE_INTEGRATED_GPU) == 1)
      ui::GpuSwitchingManager::GetInstance()->ForceUseOfIntegratedGpu();
  }

  // Initialization of the OpenGL bindings may fail, in which case we
  // will need to tear down this process. However, we can not do so
  // safely until the IPC channel is set up, because the detection of
  // early return of a child process is implemented using an IPC
  // channel error. If the IPC channel is not fully set up between the
  // browser and GPU process, and the GPU process crashes or exits
  // early, the browser process will never detect it.  For this reason
  // we defer tearing down the GPU process until receiving the
  // GpuMsg_Initialize message from the browser.
  bool dead_on_arrival = false;

#if defined(OS_WIN)
  // Use a UI message loop because ANGLE and the desktop GL platform can
  // create child windows to render to.
  base::MessagePumpForGpu::InitFactory();
  base::MessageLoop main_message_loop(base::MessageLoop::TYPE_UI);
#elif defined(OS_LINUX) && defined(USE_X11)
  // We need a UI loop so that we can grab the Expose events. See GLSurfaceGLX
  // and https://crbug.com/326995.
  base::MessageLoop main_message_loop(base::MessageLoop::TYPE_UI);
  std::unique_ptr<ui::PlatformEventSource> event_source =
      ui::PlatformEventSource::CreateDefault();
#elif defined(OS_LINUX)
  base::MessageLoop main_message_loop(base::MessageLoop::TYPE_DEFAULT);
#elif defined(OS_MACOSX)
  // This is necessary for CoreAnimation layers hosted in the GPU process to be
  // drawn. See http://crbug.com/312462.
  std::unique_ptr<base::MessagePump> pump(new base::MessagePumpCFRunLoop());
  base::MessageLoop main_message_loop(std::move(pump));
#else
  base::MessageLoop main_message_loop(base::MessageLoop::TYPE_IO);
#endif

  base::PlatformThread::SetName("CrGpuMain");

  // In addition to disabling the watchdog if the command line switch is
  // present, disable the watchdog on valgrind because the code is expected
  // to run slowly in that case.
  bool enable_watchdog =
      !command_line.HasSwitch(switches::kDisableGpuWatchdog) &&
      !RunningOnValgrind();

  // Disable the watchdog in debug builds because they tend to only be run by
  // developers who will not appreciate the watchdog killing the GPU process.
#ifndef NDEBUG
  enable_watchdog = false;
#endif

  bool delayed_watchdog_enable = false;

#if defined(OS_CHROMEOS)
  // Don't start watchdog immediately, to allow developers to switch to VT2 on
  // startup.
  delayed_watchdog_enable = true;
#endif

  scoped_refptr<gpu::GpuWatchdogThread> watchdog_thread;

  // Start the GPU watchdog only after anything that is expected to be time
  // consuming has completed, otherwise the process is liable to be aborted.
  if (enable_watchdog && !delayed_watchdog_enable)
    watchdog_thread = gpu::GpuWatchdogThread::Create();

  // Initializes StatisticsRecorder which tracks UMA histograms.
  base::StatisticsRecorder::Initialize();

  gpu::GPUInfo gpu_info;
  // Get vendor_id, device_id, driver_version from browser process through
  // commandline switches.
  GetGpuInfoFromCommandLine(gpu_info, command_line);
  gpu_info.in_process_gpu = false;

#if defined(OS_CHROMEOS) && defined(ARCH_CPU_X86_FAMILY)
  media::VaapiWrapper::PreSandboxInitialization();
#endif

#if defined(OS_ANDROID) || defined(OS_CHROMEOS)
  // Set thread priority before sandbox initialization.
  base::PlatformThread::SetCurrentThreadPriority(base::ThreadPriority::DISPLAY);
#endif

  // Warm up resources that don't need access to GPUInfo.
  WarmUpSandbox();

#if defined(OS_LINUX)
  bool initialized_sandbox = false;
  // On Chrome OS ARM Mali, GPU driver userspace creates threads when
  // initializing a GL context, so start the sandbox early.
  if (command_line.HasSwitch(switches::kGpuSandboxStartEarly)) {
    gpu_info.sandboxed = StartSandboxLinux(gpu_info, watchdog_thread.get());
    initialized_sandbox = true;
  }
#endif  // defined(OS_LINUX)

  base::TimeTicks before_initialize_one_off = base::TimeTicks::Now();

  // Determine if we need to initialize GL here or it has already been done.
  bool gl_already_initialized = false;
#if defined(OS_MACOSX)
  if (!command_line.HasSwitch(switches::kNoSandbox)) {
    // On Mac, if the sandbox is enabled, then gl::init::InitializeGLOneOff()
    // is called from the sandbox warmup code before getting here.
    gl_already_initialized = true;
  }
#endif
  if (command_line.HasSwitch(switches::kInProcessGPU)) {
    // With in-process GPU, gl::init::InitializeGLOneOff() is called from
    // GpuChildThread before getting here.
    gl_already_initialized = true;
  }

  // Load and initialize the GL implementation and locate the GL entry points.
  bool gl_initialized =
      gl_already_initialized
          ? gl::GetGLImplementation() != gl::kGLImplementationNone
          : gl::init::InitializeGLOneOff();
  if (gl_initialized) {
    // We need to collect GL strings (VENDOR, RENDERER) for blacklisting
    // purposes. However, on Mac we don't actually use them. As documented in
    // crbug.com/222934, due to some driver issues, glGetString could take
    // multiple seconds to finish, which in turn cause the GPU process to
    // crash.
    // By skipping the following code on Mac, we don't really lose anything,
    // because the basic GPU information is passed down from browser process
    // and we already registered them through SetGpuInfo() above.
    base::TimeTicks before_collect_context_graphics_info =
        base::TimeTicks::Now();
#if !defined(OS_MACOSX)
    if (!CollectGraphicsInfo(gpu_info))
      dead_on_arrival = true;

    // Recompute gpu driver bug workarounds.
    // This is necessary on systems where vendor_id/device_id aren't available
    // (Chrome OS, Android) or where workarounds may be dependent on GL_VENDOR
    // and GL_RENDERER strings which are lazily computed (Linux).
    if (!command_line.HasSwitch(switches::kDisableGpuDriverBugWorkarounds)) {
      // TODO: this can not affect disabled extensions, since they're already
      // initialized in the bindings. This should be moved before bindings
      // initialization. However, populating GPUInfo fully works only on
      // Android. Other platforms would need the bindings to query GL strings.
      gpu::ApplyGpuDriverBugWorkarounds(
          gpu_info, const_cast<base::CommandLine*>(&command_line));
    }
#endif  // !defined(OS_MACOSX)

#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
    if (gpu_info.gpu.vendor_id == 0x10de &&  // NVIDIA
        gpu_info.driver_vendor == "NVIDIA" && !CanAccessNvidiaDeviceFile())
      dead_on_arrival = true;
#endif  // defined(OS_LINUX) && !defined(OS_CHROMEOS)

    base::TimeDelta collect_context_time =
        base::TimeTicks::Now() - before_collect_context_graphics_info;
    UMA_HISTOGRAM_TIMES("GPU.CollectContextGraphicsInfo", collect_context_time);
  } else {  // gl_initialized
    VLOG(1) << "gl::init::InitializeGLOneOff failed";
    dead_on_arrival = true;
  }

  base::TimeDelta initialize_one_off_time =
      base::TimeTicks::Now() - before_initialize_one_off;
  UMA_HISTOGRAM_MEDIUM_TIMES("GPU.InitializeOneOffMediumTime",
                             initialize_one_off_time);
  if (enable_watchdog && delayed_watchdog_enable)
    watchdog_thread = gpu::GpuWatchdogThread::Create();

  // OSMesa is expected to run very slowly, so disable the watchdog in that
  // case.
  if (enable_watchdog &&
      gl::GetGLImplementation() == gl::kGLImplementationOSMesaGL) {
    watchdog_thread->Stop();
    watchdog_thread = NULL;
  }

#if defined(OS_LINUX)
  if (!initialized_sandbox)
    gpu_info.sandboxed = StartSandboxLinux(gpu_info, watchdog_thread.get());
#elif defined(OS_WIN)
  gpu_info.sandboxed = StartSandboxWindows(parameters.sandbox_info);
#elif defined(OS_MACOSX)
  gpu_info.sandboxed = Sandbox::SandboxIsCurrentlyActive();
#endif

  logging::SetLogMessageHandler(NULL);

  std::unique_ptr<gpu::GpuMemoryBufferFactory> gpu_memory_buffer_factory;
  if (gpu::GetNativeGpuMemoryBufferType() != gfx::EMPTY_BUFFER)
    gpu_memory_buffer_factory = gpu::GpuMemoryBufferFactory::CreateNativeType();

  base::ThreadPriority io_thread_priority = base::ThreadPriority::NORMAL;
#if defined(OS_ANDROID) || defined(OS_CHROMEOS)
  io_thread_priority = base::ThreadPriority::DISPLAY;
#endif

  GpuProcess gpu_process(io_thread_priority);

  GpuChildThread* child_thread = new GpuChildThread(
      watchdog_thread.get(), dead_on_arrival, gpu_info, deferred_messages.Get(),
      gpu_memory_buffer_factory.get());
  while (!deferred_messages.Get().empty())
    deferred_messages.Get().pop();

  child_thread->Init(start_time);

  gpu_process.set_main_thread(child_thread);

  if (watchdog_thread.get())
    watchdog_thread->AddPowerObserver();

#if defined(OS_ANDROID)
  base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
      tracing::GraphicsMemoryDumpProvider::GetInstance(), "AndroidGraphics",
      nullptr);
#endif

  {
    TRACE_EVENT0("gpu", "Run Message Loop");
    base::RunLoop().Run();
  }

  child_thread->StopWatchdog();

  return 0;
}

namespace {

void GetGpuInfoFromCommandLine(gpu::GPUInfo& gpu_info,
                               const base::CommandLine& command_line) {
  DCHECK(command_line.HasSwitch(switches::kGpuVendorID) &&
         command_line.HasSwitch(switches::kGpuDeviceID) &&
         command_line.HasSwitch(switches::kGpuDriverVersion));
  bool success = base::HexStringToUInt(
      command_line.GetSwitchValueASCII(switches::kGpuVendorID),
      &gpu_info.gpu.vendor_id);
  DCHECK(success);
  success = base::HexStringToUInt(
      command_line.GetSwitchValueASCII(switches::kGpuDeviceID),
      &gpu_info.gpu.device_id);
  DCHECK(success);
  gpu_info.driver_vendor =
      command_line.GetSwitchValueASCII(switches::kGpuDriverVendor);
  gpu_info.driver_version =
      command_line.GetSwitchValueASCII(switches::kGpuDriverVersion);
  gpu_info.driver_date =
      command_line.GetSwitchValueASCII(switches::kGpuDriverDate);
  gpu::ParseSecondaryGpuDevicesFromCommandLine(command_line, &gpu_info);

  // Set active gpu device.
  if (command_line.HasSwitch(switches::kGpuActiveVendorID) &&
      command_line.HasSwitch(switches::kGpuActiveDeviceID)) {
    uint32_t active_vendor_id = 0;
    uint32_t active_device_id = 0;
    success = base::HexStringToUInt(
        command_line.GetSwitchValueASCII(switches::kGpuActiveVendorID),
        &active_vendor_id);
    DCHECK(success);
    success = base::HexStringToUInt(
        command_line.GetSwitchValueASCII(switches::kGpuActiveDeviceID),
        &active_device_id);
    DCHECK(success);
    if (gpu_info.gpu.vendor_id == active_vendor_id &&
        gpu_info.gpu.device_id == active_device_id) {
      gpu_info.gpu.active = true;
    } else {
      for (size_t i = 0; i < gpu_info.secondary_gpus.size(); ++i) {
        if (gpu_info.secondary_gpus[i].vendor_id == active_vendor_id &&
            gpu_info.secondary_gpus[i].device_id == active_device_id) {
          gpu_info.secondary_gpus[i].active = true;
          break;
        }
      }
    }
  }

  GetContentClient()->SetGpuInfo(gpu_info);
}

void WarmUpSandbox() {
  {
    TRACE_EVENT0("gpu", "Warm up rand");
    // Warm up the random subsystem, which needs to be done pre-sandbox on all
    // platforms.
    (void) base::RandUint64();
  }

#if defined(OS_WIN)
  media::DXVAVideoDecodeAccelerator::PreSandboxInitialization();
  media::MediaFoundationVideoEncodeAccelerator::PreSandboxInitialization();
#endif
}

#if !defined(OS_MACOSX)
bool CollectGraphicsInfo(gpu::GPUInfo& gpu_info) {
  TRACE_EVENT0("gpu,startup", "Collect Graphics Info");

  bool res = true;
  gpu::CollectInfoResult result = gpu::CollectContextGraphicsInfo(&gpu_info);
  switch (result) {
    case gpu::kCollectInfoFatalFailure:
      LOG(ERROR) << "gpu::CollectGraphicsInfo failed (fatal).";
      res = false;
      break;
    case gpu::kCollectInfoNonFatalFailure:
      DVLOG(1) << "gpu::CollectGraphicsInfo failed (non-fatal).";
      break;
    case gpu::kCollectInfoNone:
      NOTREACHED();
      break;
    case gpu::kCollectInfoSuccess:
      break;
  }
  GetContentClient()->SetGpuInfo(gpu_info);
  return res;
}
#endif

#if defined(OS_LINUX)
#if !defined(OS_CHROMEOS)
bool CanAccessNvidiaDeviceFile() {
  bool res = true;
  base::ThreadRestrictions::AssertIOAllowed();
  if (access("/dev/nvidiactl", R_OK) != 0) {
    DVLOG(1) << "NVIDIA device file /dev/nvidiactl access denied";
    res = false;
  }
  return res;
}
#endif

bool StartSandboxLinux(const gpu::GPUInfo& gpu_info,
                       gpu::GpuWatchdogThread* watchdog_thread) {
  TRACE_EVENT0("gpu,startup", "Initialize sandbox");

  bool res = false;

  if (watchdog_thread) {
    // LinuxSandbox needs to be able to ensure that the thread
    // has really been stopped.
    LinuxSandbox::StopThread(watchdog_thread);
  }

#if defined(SANITIZER_COVERAGE)
  const std::string sancov_file_name =
      "gpu." + base::Uint64ToString(base::RandUint64());
  LinuxSandbox* linux_sandbox = LinuxSandbox::GetInstance();
  linux_sandbox->sanitizer_args()->coverage_sandboxed = 1;
  linux_sandbox->sanitizer_args()->coverage_fd =
      __sanitizer_maybe_open_cov_file(sancov_file_name.c_str());
  linux_sandbox->sanitizer_args()->coverage_max_block_size = 0;
#endif

  // LinuxSandbox::InitializeSandbox() must always be called
  // with only one thread.
  res = LinuxSandbox::InitializeSandbox();
  if (watchdog_thread) {
    base::Thread::Options options;
    options.timer_slack = base::TIMER_SLACK_MAXIMUM;
    watchdog_thread->StartWithOptions(options);
  }

  return res;
}
#endif  // defined(OS_LINUX)

#if defined(OS_WIN)
bool StartSandboxWindows(const sandbox::SandboxInterfaceInfo* sandbox_info) {
  TRACE_EVENT0("gpu,startup", "Lower token");

  // For Windows, if the target_services interface is not zero, the process
  // is sandboxed and we must call LowerToken() before rendering untrusted
  // content.
  sandbox::TargetServices* target_services = sandbox_info->target_services;
  if (target_services) {
    target_services->LowerToken();
    return true;
  }

  return false;
}
#endif  // defined(OS_WIN)

}  // namespace.

}  // namespace content