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/sys_info.h"
  21 #include "base/threading/platform_thread.h"
  22 #include "base/time/time.h"
  23 #include "base/timer/hi_res_timer_manager.h"
  24 #include "content/child/child_process.h"
  25 #include "content/common/content_constants_internal.h"
  26 #include "content/public/common/content_switches.h"
  27 #include "content/public/common/main_function_params.h"
  28 #include "content/public/renderer/content_renderer_client.h"
  29 #include "content/renderer/browser_plugin/browser_plugin_manager_impl.h"
  30 #include "content/renderer/pepper/pepper_plugin_registry.h"
  31 #include "content/renderer/render_process_impl.h"
  32 #include "content/renderer/render_thread_impl.h"
  33 #include "content/renderer/renderer_main_platform_delegate.h"
  34 #include "ui/base/ui_base_switches.h"
  35
  36 #if defined(OS_ANDROID)
  37 #include "third_party/skia/include/core/SkGraphics.h"
  38 #endif  // OS_ANDROID
  39
  40 #if defined(OS_MACOSX)
  41 #include <Carbon/Carbon.h>
  42 #include <signal.h>
  43 #include <unistd.h>
  44
  45 #include "base/mac/mac_util.h"
  46 #include "base/mac/scoped_nsautorelease_pool.h"
  47 #include "base/message_loop/message_pump_mac.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 }  // namespace
  98
  99 // mainline routine for running as the Renderer process
 100 int RendererMain(const MainFunctionParams& parameters) {
 101   TRACE_EVENT_BEGIN_ETW("RendererMain", 0, "");
 102   base::debug::TraceLog::GetInstance()->SetProcessName("Renderer");
 103   base::debug::TraceLog::GetInstance()->SetProcessSortIndex(
 104       kTraceEventRendererProcessSortIndex);
 105
 106   const CommandLine& parsed_command_line = parameters.command_line;
 107
 108 #if defined(OS_MACOSX)
 109   base::mac::ScopedNSAutoreleasePool* pool = parameters.autorelease_pool;
 110 #endif  // OS_MACOSX
 111
 112 #if defined(OS_CHROMEOS)
 113   // As Zygote process starts up earlier than browser process gets its own
 114   // locale (at login time for Chrome OS), we have to set the ICU default
 115   // locale for renderer process here.
 116   // ICU locale will be used for fallback font selection etc.
 117   if (parsed_command_line.HasSwitch(switches::kLang)) {
 118     const std::string locale =
 119         parsed_command_line.GetSwitchValueASCII(switches::kLang);
 120     base::i18n::SetICUDefaultLocale(locale);
 121   }
 122 #endif
 123
 124 #if defined(OS_ANDROID)
 125   const int kMB = 1024 * 1024;
 126   size_t font_cache_limit =
 127       base::SysInfo::IsLowEndDevice() ? kMB : 8 * kMB;
 128   SkGraphics::SetFontCacheLimit(font_cache_limit);
 129 #endif
 130
 131   // This function allows pausing execution using the --renderer-startup-dialog
 132   // flag allowing us to attach a debugger.
 133   // Do not move this function down since that would mean we can't easily debug
 134   // whatever occurs before it.
 135   HandleRendererErrorTestParameters(parsed_command_line);
 136
 137   RendererMainPlatformDelegate platform(parameters);
 138
 139
 140   base::StatsCounterTimer stats_counter_timer("Content.RendererInit");
 141   base::StatsScope<base::StatsCounterTimer> startup_timer(stats_counter_timer);
 142
 143   RendererMessageLoopObserver task_observer;
 144 #if defined(OS_MACOSX)
 145   // As long as scrollbars on Mac are painted with Cocoa, the message pump
 146   // needs to be backed by a Foundation-level loop to process NSTimers. See
 147   // http://crbug.com/306348#c24 for details.
 148   scoped_ptr<base::MessagePump> pump(new base::MessagePumpNSRunLoop());
 149   base::MessageLoop main_message_loop(pump.Pass());
 150 #else
 151   // The main message loop of the renderer services doesn't have IO or UI tasks.
 152   base::MessageLoop main_message_loop;
 153 #endif
 154   main_message_loop.AddTaskObserver(&task_observer);
 155
 156   base::PlatformThread::SetName("CrRendererMain");
 157
 158   bool no_sandbox = parsed_command_line.HasSwitch(switches::kNoSandbox);
 159
 160   // Initialize histogram statistics gathering system.
 161   base::StatisticsRecorder::Initialize();
 162
 163   // Initialize statistical testing infrastructure.  We set the entropy provider
 164   // to NULL to disallow the renderer process from creating its own one-time
 165   // randomized trials; they should be created in the browser process.
 166   base::FieldTrialList field_trial_list(NULL);
 167   // Ensure any field trials in browser are reflected into renderer.
 168   if (parsed_command_line.HasSwitch(switches::kForceFieldTrials)) {
 169     // Field trials are created in an "activated" state to ensure they get
 170     // reported in crash reports.
 171     bool result = base::FieldTrialList::CreateTrialsFromString(
 172         parsed_command_line.GetSwitchValueASCII(switches::kForceFieldTrials),
 173         base::FieldTrialList::ACTIVATE_TRIALS,
 174         std::set<std::string>());
 175     DCHECK(result);
 176   }
 177
 178   // PlatformInitialize uses FieldTrials, so this must happen later.
 179   platform.PlatformInitialize();
 180
 181 #if defined(ENABLE_PLUGINS)
 182   // Load pepper plugins before engaging the sandbox.
 183   PepperPluginRegistry::GetInstance();
 184 #endif
 185 #if defined(ENABLE_WEBRTC)
 186   // Initialize WebRTC before engaging the sandbox.
 187   // NOTE: On linux, this call could already have been made from
 188   // zygote_main_linux.cc.  However, calling multiple times from the same thread
 189   // is OK.
 190   InitializeWebRtcModule();
 191 #endif
 192
 193   {
 194 #if defined(OS_WIN) || defined(OS_MACOSX)
 195     // TODO(markus): Check if it is OK to unconditionally move this
 196     // instruction down.
 197     RenderProcessImpl render_process;
 198     new RenderThreadImpl();
 199 #endif
 200     bool run_loop = true;
 201     if (!no_sandbox) {
 202       run_loop = platform.EnableSandbox();
 203     } else {
 204       LOG(ERROR) << "Running without renderer sandbox";
 205 #ifndef NDEBUG
 206       // For convenience, we print the stack traces for crashes.  When sandbox
 207       // is enabled, the in-process stack dumping is enabled as part of the
 208       // EnableSandbox() call.
 209       base::debug::EnableInProcessStackDumping();
 210 #endif
 211     }
 212 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 213     RenderProcessImpl render_process;
 214     new RenderThreadImpl();
 215 #endif
 216
 217     base::HighResolutionTimerManager hi_res_timer_manager;
 218
 219     startup_timer.Stop();  // End of Startup Time Measurement.
 220
 221     if (run_loop) {
 222 #if defined(OS_MACOSX)
 223       if (pool)
 224         pool->Recycle();
 225 #endif
 226       TRACE_EVENT_BEGIN_ETW("RendererMain.START_MSG_LOOP", 0, 0);
 227       base::MessageLoop::current()->Run();
 228       TRACE_EVENT_END_ETW("RendererMain.START_MSG_LOOP", 0, 0);
 229     }
 230   }
 231   platform.PlatformUninitialize();
 232   TRACE_EVENT_END_ETW("RendererMain", 0, "");
 233   return 0;
 234 }
 235
 236 }  // namespace content