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// 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 <stdlib.h>
#if defined(OS_WIN)
#include <windows.h>
#endif
#include "base/debug/trace_event.h"
#include "base/environment.h"
#include "base/message_loop.h"
#include "base/rand_util.h"
#include "base/string_number_conversions.h"
#include "base/stringprintf.h"
#include "base/threading/platform_thread.h"
#include "base/win/scoped_com_initializer.h"
#include "build/build_config.h"
#include "content/common/gpu/gpu_config.h"
#include "content/gpu/gpu_child_thread.h"
#include "content/gpu/gpu_info_collector.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 "crypto/hmac.h"
#include "ui/gl/gl_surface.h"
#include "ui/gl/gl_switches.h"
#if defined(OS_WIN)
#include "content/common/gpu/media/dxva_video_decode_accelerator.h"
#include "sandbox/src/sandbox.h"
#endif
#if defined(USE_X11)
#include "ui/base/x/x11_util.h"
#endif
#if defined(OS_LINUX)
#include "content/public/common/sandbox_init.h"
#endif
// Main function for starting the Gpu process.
int GpuMain(const content::MainFunctionParams& parameters) {
TRACE_EVENT0("gpu", "GpuMain");
base::Time start_time = base::Time::Now();
const CommandLine& command_line = parameters.command_line;
if (command_line.HasSwitch(switches::kGpuStartupDialog)) {
ChildProcess::WaitForDebugger("Gpu");
}
if (!command_line.HasSwitch(switches::kSingleProcess)) {
#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();
#endif
}
// 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;
content::GPUInfo gpu_info;
// Get vendor_id, device_id, driver_version from browser process through
// commandline switches.
DCHECK(command_line.HasSwitch(switches::kGpuVendorID) &&
command_line.HasSwitch(switches::kGpuDeviceID) &&
command_line.HasSwitch(switches::kGpuDriverVersion));
bool success = base::HexStringToInt(
command_line.GetSwitchValueASCII(switches::kGpuVendorID),
reinterpret_cast<int*>(&(gpu_info.gpu.vendor_id)));
DCHECK(success);
success = base::HexStringToInt(
command_line.GetSwitchValueASCII(switches::kGpuDeviceID),
reinterpret_cast<int*>(&(gpu_info.gpu.device_id)));
gpu_info.driver_version =
command_line.GetSwitchValueASCII(switches::kGpuDriverVersion);
content::GetContentClient()->SetGpuInfo(gpu_info);
// Load and initialize the GL implementation and locate the GL entry points.
if (gfx::GLSurface::InitializeOneOff()) {
#if defined(OS_LINUX)
// We collect full GPU info on demand in Win/Mac, i.e., when about:gpu
// page opens. This is because we can make blacklist decisions based on
// preliminary GPU info.
// However, on Linux, blacklist decisions are based on full GPU info.
if (!gpu_info_collector::CollectGraphicsInfo(&gpu_info))
VLOG(1) << "gpu_info_collector::CollectGraphicsInfo failed";
content::GetContentClient()->SetGpuInfo(gpu_info);
#if !defined(OS_CHROMEOS)
if (gpu_info.gpu.vendor_id == 0x10de && // NVIDIA
gpu_info.driver_vendor == "NVIDIA") {
base::ThreadRestrictions::AssertIOAllowed();
if (access("/dev/nvidiactl", R_OK) != 0) {
VLOG(1) << "NVIDIA device file /dev/nvidiactl access denied";
gpu_info.gpu_accessible = false;
dead_on_arrival = true;
}
}
#endif // OS_CHROMEOS
#endif // OS_LINUX
} else {
VLOG(1) << "gfx::GLSurface::InitializeOneOff failed";
gpu_info.gpu_accessible = false;
gpu_info.finalized = true;
dead_on_arrival = true;
}
{
TRACE_EVENT0("gpu", "Warm up rand");
// Warm up the random subsystem, which needs to be done pre-sandbox on all
// platforms.
(void) base::RandUint64();
}
{
TRACE_EVENT0("gpu", "Warm up HMAC");
// Warm up the crypto subsystem, which needs to done pre-sandbox on all
// platforms.
crypto::HMAC hmac(crypto::HMAC::SHA256);
unsigned char key = '\0';
bool ret = hmac.Init(&key, sizeof(key));
(void) ret;
}
#if defined(OS_LINUX)
{
TRACE_EVENT0("gpu", "Initialize sandbox");
bool do_init_sandbox = true;
#if defined(OS_CHROMEOS) && defined(NDEBUG)
// On Chrome OS and when not on a debug build, initialize
// the GPU process' sandbox only for Intel GPUs.
do_init_sandbox = gpu_info.gpu.vendor_id == 0x8086; // Intel GPU.
#endif
if (do_init_sandbox) {
content::InitializeSandbox();
}
}
#endif
{
TRACE_EVENT0("gpu", "Initialize COM");
base::win::ScopedCOMInitializer com_initializer;
}
#if defined(OS_WIN)
{
TRACE_EVENT0("gpu", "Preload setupapi.dll");
// Preload this DLL because the sandbox prevents it from loading.
LoadLibrary(L"setupapi.dll");
}
{
TRACE_EVENT0("gpu", "Initialize DXVA");
// Initialize H/W video decoding stuff which fails in the sandbox.
DXVAVideoDecodeAccelerator::PreSandboxInitialization();
}
{
TRACE_EVENT0("gpu", "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 =
parameters.sandbox_info->target_services;
if (target_services)
target_services->LowerToken();
}
#endif
MessageLoop::Type message_loop_type = MessageLoop::TYPE_IO;
#if defined(OS_WIN)
// Unless we're running on desktop GL, we don't need a UI message
// loop, so avoid its use to work around apparent problems with some
// third-party software.
if (command_line.HasSwitch(switches::kUseGL) &&
command_line.GetSwitchValueASCII(switches::kUseGL) ==
gfx::kGLImplementationDesktopName) {
message_loop_type = MessageLoop::TYPE_UI;
}
#elif defined(OS_LINUX)
message_loop_type = MessageLoop::TYPE_DEFAULT;
#endif
MessageLoop main_message_loop(message_loop_type);
base::PlatformThread::SetName("CrGpuMain");
GpuProcess gpu_process;
GpuChildThread* child_thread = new GpuChildThread(dead_on_arrival, gpu_info);
child_thread->Init(start_time);
gpu_process.set_main_thread(child_thread);
{
TRACE_EVENT0("gpu", "Run Message Loop");
main_message_loop.Run();
}
child_thread->StopWatchdog();
return 0;
}
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