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// Copyright (c) 2010 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>
#include "app/app_switches.h"
#include "app/gfx/gl/gl_context.h"
#include "app/gfx/gl/gl_implementation.h"
#include "base/environment.h"
#include "base/message_loop.h"
#include "base/metrics/field_trial.h"
#include "base/stringprintf.h"
#include "build/build_config.h"
#include "chrome/common/chrome_constants.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/env_vars.h"
#include "chrome/common/main_function_params.h"
#include "chrome/gpu/gpu_config.h"
#include "chrome/gpu/gpu_process.h"
#include "chrome/gpu/gpu_thread.h"
#include "chrome/gpu/gpu_watchdog_thread.h"
#if defined(USE_LINUX_BREAKPAD)
#include "chrome/app/breakpad_linux.h"
#endif
#if defined(OS_WIN)
#include "app/win_util.h"
#endif
#if defined(USE_X11)
#include "app/x11_util.h"
#include "app/x11_util_internal.h"
#endif
namespace {
// 1% per watchdog trial group.
const int kFieldTrialSize = 1;
// 5 - 20 seconds timeout.
const int kMinGpuTimeout = 5;
const int kMaxGpuTimeout = 20;
#if defined(USE_X11)
int GpuX11ErrorHandler(Display* d, XErrorEvent* error) {
LOG(ERROR) << x11_util::GetErrorEventDescription(d, error);
return 0;
}
void SetGpuX11ErrorHandlers() {
// Set up the error handlers so that only general errors aren't fatal.
x11_util::SetX11ErrorHandlers(GpuX11ErrorHandler, NULL);
}
#endif
}
// Main function for starting the Gpu process.
int GpuMain(const MainFunctionParams& parameters) {
base::Time start_time = base::Time::Now();
#if defined(USE_LINUX_BREAKPAD)
// Needs to be called after we have chrome::DIR_USER_DATA.
InitCrashReporter();
#endif
#if defined(OS_LINUX)
// On Linux we exec ourselves from /proc/self/exe, but that makes the
// process name that shows up in "ps" etc. for the GPU process show as
// "exe" instead of "chrome" or something reasonable. Try to fix it.
CommandLine::SetProcTitle();
#endif
const CommandLine& command_line = parameters.command_line_;
if (command_line.HasSwitch(switches::kGpuStartupDialog)) {
ChildProcess::WaitForDebugger(L"Gpu");
}
MessageLoop main_message_loop(MessageLoop::TYPE_UI);
PlatformThread::SetName("CrGpuMain");
#if defined(OS_WIN)
win_util::ScopedCOMInitializer com_initializer;
#endif
#if defined(USE_X11)
SetGpuX11ErrorHandlers();
#endif
// On Linux the GpuThread constructor performs certain
// initialization that is required before accessing the default X
// display.
GpuProcess gpu_process;
GpuThread* gpu_thread = new GpuThread;
gpu_process.set_main_thread(gpu_thread);
// Load the GL implementation and locate the bindings before starting as
// this can take a lot of time and the GPU watchdog might terminate the GPU
// process.
if (!gfx::GLContext::InitializeOneOff())
return EXIT_FAILURE;
// Only enable this experimental feaure for a subset of users.
scoped_refptr<base::FieldTrial> watchdog_trial(
new base::FieldTrial("GpuWatchdogTrial", 100));
int watchdog_timeout = 0;
for (int i = kMinGpuTimeout; i <= kMaxGpuTimeout; ++i) {
int group = watchdog_trial->AppendGroup(StringPrintf("%dsecs", i),
kFieldTrialSize);
if (group == watchdog_trial->group()) {
watchdog_timeout = i;
break;
}
}
scoped_ptr<base::Environment> env(base::Environment::Create());
// In addition to disabling the watchdog if the command line switch is
// present, disable it in two other cases. OSMesa is expected to run very
// slowly. Also disable the watchdog on valgrind because the code is expected
// to run slowly in that case.
bool enable_watchdog =
watchdog_timeout != 0 &&
!command_line.HasSwitch(switches::kDisableGpuWatchdog) &&
gfx::GetGLImplementation() != gfx::kGLImplementationOSMesaGL &&
!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
scoped_refptr<GpuWatchdogThread> watchdog_thread;
if (enable_watchdog) {
watchdog_thread = new GpuWatchdogThread(MessageLoop::current(),
watchdog_timeout * 1000);
watchdog_thread->Start();
}
// Do this immediately before running the message loop so the correct
// initialization time is recorded in the GPU info.
gpu_thread->Init(start_time);
main_message_loop.Run();
if (enable_watchdog)
watchdog_thread->Stop();
return 0;
}
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