blob: 5ef677ae1eebd852377223ef28236aef2a34d366 [file] [log] [blame]
// 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 "base/base_switches.h"
#include "base/command_line.h"
#include "base/debug/debugger.h"
#include "base/debug/stack_trace.h"
#include "base/debug/trace_event.h"
#include "base/i18n/rtl.h"
#include "base/memory/ref_counted.h"
#include "base/message_loop/message_loop.h"
#include "base/metrics/field_trial.h"
#include "base/metrics/histogram.h"
#include "base/metrics/statistics_recorder.h"
#include "base/metrics/stats_counters.h"
#include "base/pending_task.h"
#include "base/strings/string_util.h"
#include "base/sys_info.h"
#include "base/threading/platform_thread.h"
#include "base/time/time.h"
#include "base/timer/hi_res_timer_manager.h"
#include "content/child/child_process.h"
#include "content/common/content_constants_internal.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/main_function_params.h"
#include "content/public/renderer/content_renderer_client.h"
#include "content/renderer/render_process_impl.h"
#include "content/renderer/render_thread_impl.h"
#include "content/renderer/renderer_main_platform_delegate.h"
#include "ui/base/ui_base_switches.h"
#if defined(OS_ANDROID)
#include "base/android/library_loader/library_loader_hooks.h"
#include "third_party/skia/include/core/SkGraphics.h"
#endif // OS_ANDROID
#if defined(OS_MACOSX)
#include <Carbon/Carbon.h>
#include <signal.h>
#include <unistd.h>
#include "base/mac/mac_util.h"
#include "base/mac/scoped_nsautorelease_pool.h"
#include "base/message_loop/message_pump_mac.h"
#include "third_party/WebKit/public/web/WebView.h"
#endif // OS_MACOSX
#if defined(ENABLE_PLUGINS)
#include "content/renderer/pepper/pepper_plugin_registry.h"
#endif
#if defined(ENABLE_WEBRTC)
#include "third_party/libjingle/overrides/init_webrtc.h"
#endif
namespace content {
namespace {
// This function provides some ways to test crash and assertion handling
// behavior of the renderer.
static void HandleRendererErrorTestParameters(const CommandLine& command_line) {
if (command_line.HasSwitch(switches::kWaitForDebugger))
base::debug::WaitForDebugger(60, true);
if (command_line.HasSwitch(switches::kRendererStartupDialog))
ChildProcess::WaitForDebugger("Renderer");
// This parameter causes an assertion.
if (command_line.HasSwitch(switches::kRendererAssertTest)) {
DCHECK(false);
}
}
// This is a simplified version of the browser Jankometer, which measures
// the processing time of tasks on the render thread.
class RendererMessageLoopObserver : public base::MessageLoop::TaskObserver {
public:
RendererMessageLoopObserver()
: process_times_(base::Histogram::FactoryGet(
"Chrome.ProcMsgL RenderThread",
1, 3600000, 50, base::Histogram::kUmaTargetedHistogramFlag)) {}
~RendererMessageLoopObserver() override {}
void WillProcessTask(const base::PendingTask& pending_task) override {
begin_process_message_ = base::TimeTicks::Now();
}
void DidProcessTask(const base::PendingTask& pending_task) override {
if (!begin_process_message_.is_null())
process_times_->AddTime(base::TimeTicks::Now() - begin_process_message_);
}
private:
base::TimeTicks begin_process_message_;
base::HistogramBase* const process_times_;
DISALLOW_COPY_AND_ASSIGN(RendererMessageLoopObserver);
};
} // namespace
// mainline routine for running as the Renderer process
int RendererMain(const MainFunctionParams& parameters) {
TRACE_EVENT_BEGIN_ETW("RendererMain", 0, "");
base::debug::TraceLog::GetInstance()->SetProcessName("Renderer");
base::debug::TraceLog::GetInstance()->SetProcessSortIndex(
kTraceEventRendererProcessSortIndex);
const CommandLine& parsed_command_line = parameters.command_line;
#if defined(OS_MACOSX)
base::mac::ScopedNSAutoreleasePool* pool = parameters.autorelease_pool;
#endif // OS_MACOSX
#if defined(OS_CHROMEOS)
// As Zygote process starts up earlier than browser process gets its own
// locale (at login time for Chrome OS), we have to set the ICU default
// locale for renderer process here.
// ICU locale will be used for fallback font selection etc.
if (parsed_command_line.HasSwitch(switches::kLang)) {
const std::string locale =
parsed_command_line.GetSwitchValueASCII(switches::kLang);
base::i18n::SetICUDefaultLocale(locale);
}
#endif
#if defined(OS_ANDROID)
const int kMB = 1024 * 1024;
size_t font_cache_limit =
base::SysInfo::IsLowEndDevice() ? kMB : 8 * kMB;
SkGraphics::SetFontCacheLimit(font_cache_limit);
#endif
// This function allows pausing execution using the --renderer-startup-dialog
// flag allowing us to attach a debugger.
// Do not move this function down since that would mean we can't easily debug
// whatever occurs before it.
HandleRendererErrorTestParameters(parsed_command_line);
RendererMainPlatformDelegate platform(parameters);
base::StatsCounterTimer stats_counter_timer("Content.RendererInit");
base::StatsScope<base::StatsCounterTimer> startup_timer(stats_counter_timer);
RendererMessageLoopObserver task_observer;
#if defined(OS_MACOSX)
// As long as scrollbars on Mac are painted with Cocoa, the message pump
// needs to be backed by a Foundation-level loop to process NSTimers. See
// http://crbug.com/306348#c24 for details.
scoped_ptr<base::MessagePump> pump(new base::MessagePumpNSRunLoop());
scoped_ptr<base::MessageLoop> main_message_loop(
new base::MessageLoop(pump.Pass()));
#else
// The main message loop of the renderer services doesn't have IO or UI tasks.
scoped_ptr<base::MessageLoop> main_message_loop(new base::MessageLoop());
#endif
main_message_loop->AddTaskObserver(&task_observer);
base::PlatformThread::SetName("CrRendererMain");
bool no_sandbox = parsed_command_line.HasSwitch(switches::kNoSandbox);
// Initialize histogram statistics gathering system.
base::StatisticsRecorder::Initialize();
#if defined(OS_ANDROID)
// If we have a pending chromium android linker histogram, record it.
base::android::RecordChromiumAndroidLinkerRendererHistogram();
#endif
// Initialize statistical testing infrastructure. We set the entropy provider
// to NULL to disallow the renderer process from creating its own one-time
// randomized trials; they should be created in the browser process.
base::FieldTrialList field_trial_list(NULL);
// Ensure any field trials in browser are reflected into renderer.
if (parsed_command_line.HasSwitch(switches::kForceFieldTrials)) {
// Field trials are created in an "activated" state to ensure they get
// reported in crash reports.
bool result = base::FieldTrialList::CreateTrialsFromString(
parsed_command_line.GetSwitchValueASCII(switches::kForceFieldTrials),
base::FieldTrialList::ACTIVATE_TRIALS,
std::set<std::string>());
DCHECK(result);
}
// PlatformInitialize uses FieldTrials, so this must happen later.
platform.PlatformInitialize();
#if defined(ENABLE_PLUGINS)
// Load pepper plugins before engaging the sandbox.
PepperPluginRegistry::GetInstance();
#endif
#if defined(ENABLE_WEBRTC)
// Initialize WebRTC before engaging the sandbox.
// NOTE: On linux, this call could already have been made from
// zygote_main_linux.cc. However, calling multiple times from the same thread
// is OK.
InitializeWebRtcModule();
#endif
{
#if defined(OS_WIN) || defined(OS_MACOSX)
// TODO(markus): Check if it is OK to unconditionally move this
// instruction down.
RenderProcessImpl render_process;
new RenderThreadImpl(main_message_loop.Pass());
#endif
bool run_loop = true;
if (!no_sandbox) {
run_loop = platform.EnableSandbox();
} else {
LOG(ERROR) << "Running without renderer sandbox";
#ifndef NDEBUG
// For convenience, we print the stack traces for crashes. When sandbox
// is enabled, the in-process stack dumping is enabled as part of the
// EnableSandbox() call.
base::debug::EnableInProcessStackDumping();
#endif
}
#if defined(OS_POSIX) && !defined(OS_MACOSX)
RenderProcessImpl render_process;
new RenderThreadImpl(main_message_loop.Pass());
#endif
base::HighResolutionTimerManager hi_res_timer_manager;
startup_timer.Stop(); // End of Startup Time Measurement.
if (run_loop) {
#if defined(OS_MACOSX)
if (pool)
pool->Recycle();
#endif
TRACE_EVENT_BEGIN_ETW("RendererMain.START_MSG_LOOP", 0, 0);
base::MessageLoop::current()->Run();
TRACE_EVENT_END_ETW("RendererMain.START_MSG_LOOP", 0, 0);
}
}
platform.PlatformUninitialize();
TRACE_EVENT_END_ETW("RendererMain", 0, "");
return 0;
}
} // namespace content