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// Copyright (c) 2011 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/environment.h"
#include "base/message_loop.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/content_switches.h"
#include "content/common/gpu/gpu_config.h"
#include "content/common/main_function_params.h"
#include "content/gpu/gpu_child_thread.h"
#include "content/gpu/gpu_process.h"
#include "ui/gfx/gl/gl_surface.h"
#if defined(OS_MACOSX)
#include "content/common/chrome_application_mac.h"
#elif defined(OS_WIN)
#include "sandbox/src/sandbox.h"
#endif
#if defined(USE_X11)
#include "ui/base/x/x11_util.h"
#endif
// Main function for starting the Gpu process.
int GpuMain(const MainFunctionParams& parameters) {
base::Time start_time = base::Time::Now();
const CommandLine& command_line = parameters.command_line_;
if (command_line.HasSwitch(switches::kGpuStartupDialog)) {
ChildProcess::WaitForDebugger("Gpu");
}
// 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)
sandbox::TargetServices* target_services =
parameters.sandbox_info_.TargetServices();
// For windows, if the target_services interface is not zero, the process
// is sandboxed and we must call LowerToken() before rendering untrusted
// content.
if (target_services)
target_services->LowerToken();
#endif
// Load the GL implementation and locate the bindings before starting the GPU
// watchdog because this can take a lot of time and the GPU watchdog might
// terminate the GPU process.
if (!gfx::GLSurface::InitializeOneOff()) {
LOG(INFO) << "GLContext::InitializeOneOff failed";
dead_on_arrival = true;
}
#if defined(OS_MACOSX)
chrome_application_mac::RegisterCrApp();
#endif
MessageLoop main_message_loop(MessageLoop::TYPE_UI);
base::PlatformThread::SetName("CrGpuMain");
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
}
base::win::ScopedCOMInitializer com_initializer;
GpuProcess gpu_process;
GpuChildThread* child_thread = new GpuChildThread(dead_on_arrival);
child_thread->Init(start_time);
gpu_process.set_main_thread(child_thread);
main_message_loop.Run();
child_thread->StopWatchdog();
return 0;
}
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