content/renderer/renderer_main.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/base_switches.h"
   6 #include "base/command_line.h"
   7 #include "base/debug/debugger.h"
   8 #include "base/debug/stack_trace.h"
   9 #include "base/debug/trace_event.h"
  10 #include "base/i18n/rtl.h"
  11 #include "base/memory/ref_counted.h"
  12 #include "base/message_loop/message_loop.h"
  13 #include "base/metrics/field_trial.h"
  14 #include "base/metrics/histogram.h"
  15 #include "base/metrics/statistics_recorder.h"
  16 #include "base/metrics/stats_counters.h"
  17 #include "base/path_service.h"
  18 #include "base/pending_task.h"
  19 #include "base/strings/string_util.h"
  20 #include "base/threading/platform_thread.h"
  21 #include "base/time/time.h"
  22 #include "base/timer/hi_res_timer_manager.h"
  23 #include "content/child/child_process.h"
  24 #include "content/common/content_constants_internal.h"
  25 #include "content/public/common/content_switches.h"
  26 #include "content/public/common/main_function_params.h"
  27 #include "content/public/renderer/content_renderer_client.h"
  28 #include "content/renderer/browser_plugin/browser_plugin_manager_impl.h"
  29 #include "content/renderer/pepper/pepper_plugin_registry.h"
  30 #include "content/renderer/render_process_impl.h"
  31 #include "content/renderer/render_thread_impl.h"
  32 #include "content/renderer/renderer_main_platform_delegate.h"
  33 #include "ui/base/ui_base_switches.h"
  34 #include "webkit/child/webkit_child_helpers.h"
  35
  36 #if defined(OS_ANDROID)
  37 #include "base/android/sys_utils.h"
  38 #include "third_party/skia/include/core/SkGraphics.h"
  39 #endif  // OS_ANDROID
  40
  41 #if defined(OS_MACOSX)
  42 #include <Carbon/Carbon.h>
  43 #include <signal.h>
  44 #include <unistd.h>
  45
  46 #include "base/mac/mac_util.h"
  47 #include "base/mac/scoped_nsautorelease_pool.h"
  48 #include "third_party/WebKit/public/web/WebView.h"
  49 #endif  // OS_MACOSX
  50
  51 #if defined(ENABLE_WEBRTC)
  52 #include "third_party/libjingle/overrides/init_webrtc.h"
  53 #endif
  54
  55 namespace content {
  56 namespace {
  57 // This function provides some ways to test crash and assertion handling
  58 // behavior of the renderer.
  59 static void HandleRendererErrorTestParameters(const CommandLine& command_line) {
  60   if (command_line.HasSwitch(switches::kWaitForDebugger))
  61     base::debug::WaitForDebugger(60, true);
  62
  63   if (command_line.HasSwitch(switches::kRendererStartupDialog))
  64     ChildProcess::WaitForDebugger("Renderer");
  65
  66   // This parameter causes an assertion.
  67   if (command_line.HasSwitch(switches::kRendererAssertTest)) {
  68     DCHECK(false);
  69   }
  70 }
  71
  72 // This is a simplified version of the browser Jankometer, which measures
  73 // the processing time of tasks on the render thread.
  74 class RendererMessageLoopObserver : public base::MessageLoop::TaskObserver {
  75  public:
  76   RendererMessageLoopObserver()
  77       : process_times_(base::Histogram::FactoryGet(
  78             "Chrome.ProcMsgL RenderThread",
  79             1, 3600000, 50, base::Histogram::kUmaTargetedHistogramFlag)) {}
  80   virtual ~RendererMessageLoopObserver() {}
  81
  82   virtual void WillProcessTask(const base::PendingTask& pending_task) OVERRIDE {
  83     begin_process_message_ = base::TimeTicks::Now();
  84   }
  85
  86   virtual void DidProcessTask(const base::PendingTask& pending_task) OVERRIDE {
  87     if (!begin_process_message_.is_null())
  88       process_times_->AddTime(base::TimeTicks::Now() - begin_process_message_);
  89   }
  90
  91  private:
  92   base::TimeTicks begin_process_message_;
  93   base::HistogramBase* const process_times_;
  94   DISALLOW_COPY_AND_ASSIGN(RendererMessageLoopObserver);
  95 };
  96
  97 // For measuring memory usage after each task. Behind a command line flag.
  98 class MemoryObserver : public base::MessageLoop::TaskObserver {
  99  public:
 100   MemoryObserver() {}
 101   virtual ~MemoryObserver() {}
 102
 103   virtual void WillProcessTask(const base::PendingTask& pending_task) OVERRIDE {
 104   }
 105
 106   virtual void DidProcessTask(const base::PendingTask& pending_task) OVERRIDE {
 107     HISTOGRAM_MEMORY_KB("Memory.RendererUsed", webkit_glue::MemoryUsageKB());
 108   }
 109  private:
 110   DISALLOW_COPY_AND_ASSIGN(MemoryObserver);
 111 };
 112
 113 }  // namespace
 114
 115 // mainline routine for running as the Renderer process
 116 int RendererMain(const MainFunctionParams& parameters) {
 117   TRACE_EVENT_BEGIN_ETW("RendererMain", 0, "");
 118   base::debug::TraceLog::GetInstance()->SetProcessName("Renderer");
 119   base::debug::TraceLog::GetInstance()->SetProcessSortIndex(
 120       kTraceEventRendererProcessSortIndex);
 121
 122   const CommandLine& parsed_command_line = parameters.command_line;
 123
 124 #if defined(OS_MACOSX)
 125   base::mac::ScopedNSAutoreleasePool* pool = parameters.autorelease_pool;
 126 #endif  // OS_MACOSX
 127
 128 #if defined(OS_CHROMEOS)
 129   // As Zygote process starts up earlier than browser process gets its own
 130   // locale (at login time for Chrome OS), we have to set the ICU default
 131   // locale for renderer process here.
 132   // ICU locale will be used for fallback font selection etc.
 133   if (parsed_command_line.HasSwitch(switches::kLang)) {
 134     const std::string locale =
 135         parsed_command_line.GetSwitchValueASCII(switches::kLang);
 136     base::i18n::SetICUDefaultLocale(locale);
 137   }
 138 #endif
 139
 140 #if defined(OS_ANDROID)
 141   const int kMB = 1024 * 1024;
 142   size_t font_cache_limit =
 143       base::android::SysUtils::IsLowEndDevice() ? kMB : 8 * kMB;
 144   SkGraphics::SetFontCacheLimit(font_cache_limit);
 145 #endif
 146
 147   // This function allows pausing execution using the --renderer-startup-dialog
 148   // flag allowing us to attach a debugger.
 149   // Do not move this function down since that would mean we can't easily debug
 150   // whatever occurs before it.
 151   HandleRendererErrorTestParameters(parsed_command_line);
 152
 153   RendererMainPlatformDelegate platform(parameters);
 154
 155
 156   base::StatsCounterTimer stats_counter_timer("Content.RendererInit");
 157   base::StatsScope<base::StatsCounterTimer> startup_timer(stats_counter_timer);
 158
 159   RendererMessageLoopObserver task_observer;
 160 #if defined(OS_MACOSX)
 161   // As long as we use Cocoa in the renderer (for the forseeable future as of
 162   // now; see http://crbug.com/306348 for info) we need to have a UI loop.
 163   base::MessageLoop main_message_loop(base::MessageLoop::TYPE_UI);
 164 #else
 165   // The main message loop of the renderer services doesn't have IO or UI tasks,
 166   // unless in-process-plugins is used.
 167   base::MessageLoop main_message_loop(RenderProcessImpl::InProcessPlugins()
 168                                           ? base::MessageLoop::TYPE_UI
 169                                           : base::MessageLoop::TYPE_DEFAULT);
 170 #endif
 171   main_message_loop.AddTaskObserver(&task_observer);
 172
 173   scoped_ptr<MemoryObserver> memory_observer;
 174   if (parsed_command_line.HasSwitch(switches::kMemoryMetrics)) {
 175     memory_observer.reset(new MemoryObserver());
 176     main_message_loop.AddTaskObserver(memory_observer.get());
 177   }
 178
 179   base::PlatformThread::SetName("CrRendererMain");
 180
 181   platform.PlatformInitialize();
 182
 183   bool no_sandbox = parsed_command_line.HasSwitch(switches::kNoSandbox);
 184   platform.InitSandboxTests(no_sandbox);
 185
 186   // Initialize histogram statistics gathering system.
 187   base::StatisticsRecorder::Initialize();
 188
 189   // Initialize statistical testing infrastructure.  We set the entropy provider
 190   // to NULL to disallow the renderer process from creating its own one-time
 191   // randomized trials; they should be created in the browser process.
 192   base::FieldTrialList field_trial_list(NULL);
 193   // Ensure any field trials in browser are reflected into renderer.
 194   if (parsed_command_line.HasSwitch(switches::kForceFieldTrials)) {
 195     // Field trials are created in an "activated" state to ensure they get
 196     // reported in crash reports.
 197     bool result = base::FieldTrialList::CreateTrialsFromString(
 198         parsed_command_line.GetSwitchValueASCII(switches::kForceFieldTrials),
 199         base::FieldTrialList::ACTIVATE_TRIALS);
 200     DCHECK(result);
 201   }
 202
 203 #if defined(ENABLE_PLUGINS)
 204   // Load pepper plugins before engaging the sandbox.
 205   PepperPluginRegistry::GetInstance();
 206 #endif
 207 #if defined(ENABLE_WEBRTC)
 208   // Initialize WebRTC before engaging the sandbox.
 209   // NOTE: On linux, this call could already have been made from
 210   // zygote_main_linux.cc.  However, calling multiple times from the same thread
 211   // is OK.
 212   InitializeWebRtcModule();
 213 #endif
 214
 215   {
 216 #if defined(OS_WIN) || defined(OS_MACOSX)
 217     // TODO(markus): Check if it is OK to unconditionally move this
 218     // instruction down.
 219     RenderProcessImpl render_process;
 220     new RenderThreadImpl();
 221 #endif
 222     bool run_loop = true;
 223     if (!no_sandbox) {
 224       run_loop = platform.EnableSandbox();
 225     } else {
 226       LOG(ERROR) << "Running without renderer sandbox";
 227 #ifndef NDEBUG
 228       // For convenience, we print the stack trace for crashes. We can't get
 229       // symbols when the sandbox is enabled, so only try when the sandbox is
 230       // disabled.
 231       base::debug::EnableInProcessStackDumping();
 232 #endif
 233     }
 234 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 235     RenderProcessImpl render_process;
 236     new RenderThreadImpl();
 237 #endif
 238
 239     base::HighResolutionTimerManager hi_res_timer_manager;
 240
 241     platform.RunSandboxTests(no_sandbox);
 242
 243     startup_timer.Stop();  // End of Startup Time Measurement.
 244
 245     if (run_loop) {
 246 #if defined(OS_MACOSX)
 247       if (pool)
 248         pool->Recycle();
 249 #endif
 250       TRACE_EVENT_BEGIN_ETW("RendererMain.START_MSG_LOOP", 0, 0);
 251       base::MessageLoop::current()->Run();
 252       TRACE_EVENT_END_ETW("RendererMain.START_MSG_LOOP", 0, 0);
 253     }
 254   }
 255   platform.PlatformUninitialize();
 256   TRACE_EVENT_END_ETW("RendererMain", 0, "");
 257   return 0;
 258 }
 259
 260 }  // namespace content