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/child/content_child_helpers.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 "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 "base/message_loop/message_pump_mac.h"
  49 #include "third_party/WebKit/public/web/WebView.h"
  50 #endif  // OS_MACOSX
  51
  52 #if defined(ENABLE_WEBRTC)
  53 #include "third_party/libjingle/overrides/init_webrtc.h"
  54 #endif
  55
  56 namespace content {
  57 namespace {
  58 // This function provides some ways to test crash and assertion handling
  59 // behavior of the renderer.
  60 static void HandleRendererErrorTestParameters(const CommandLine& command_line) {
  61   if (command_line.HasSwitch(switches::kWaitForDebugger))
  62     base::debug::WaitForDebugger(60, true);
  63
  64   if (command_line.HasSwitch(switches::kRendererStartupDialog))
  65     ChildProcess::WaitForDebugger("Renderer");
  66
  67   // This parameter causes an assertion.
  68   if (command_line.HasSwitch(switches::kRendererAssertTest)) {
  69     DCHECK(false);
  70   }
  71 }
  72
  73 // This is a simplified version of the browser Jankometer, which measures
  74 // the processing time of tasks on the render thread.
  75 class RendererMessageLoopObserver : public base::MessageLoop::TaskObserver {
  76  public:
  77   RendererMessageLoopObserver()
  78       : process_times_(base::Histogram::FactoryGet(
  79             "Chrome.ProcMsgL RenderThread",
  80             1, 3600000, 50, base::Histogram::kUmaTargetedHistogramFlag)) {}
  81   virtual ~RendererMessageLoopObserver() {}
  82
  83   virtual void WillProcessTask(const base::PendingTask& pending_task) OVERRIDE {
  84     begin_process_message_ = base::TimeTicks::Now();
  85   }
  86
  87   virtual void DidProcessTask(const base::PendingTask& pending_task) OVERRIDE {
  88     if (!begin_process_message_.is_null())
  89       process_times_->AddTime(base::TimeTicks::Now() - begin_process_message_);
  90   }
  91
  92  private:
  93   base::TimeTicks begin_process_message_;
  94   base::HistogramBase* const process_times_;
  95   DISALLOW_COPY_AND_ASSIGN(RendererMessageLoopObserver);
  96 };
  97
  98 // For measuring memory usage after each task. Behind a command line flag.
  99 class MemoryObserver : public base::MessageLoop::TaskObserver {
 100  public:
 101   MemoryObserver() {}
 102   virtual ~MemoryObserver() {}
 103
 104   virtual void WillProcessTask(const base::PendingTask& pending_task) OVERRIDE {
 105   }
 106
 107   virtual void DidProcessTask(const base::PendingTask& pending_task) OVERRIDE {
 108     HISTOGRAM_MEMORY_KB("Memory.RendererUsed", GetMemoryUsageKB());
 109   }
 110  private:
 111   DISALLOW_COPY_AND_ASSIGN(MemoryObserver);
 112 };
 113
 114 }  // namespace
 115
 116 // mainline routine for running as the Renderer process
 117 int RendererMain(const MainFunctionParams& parameters) {
 118   TRACE_EVENT_BEGIN_ETW("RendererMain", 0, "");
 119   base::debug::TraceLog::GetInstance()->SetProcessName("Renderer");
 120   base::debug::TraceLog::GetInstance()->SetProcessSortIndex(
 121       kTraceEventRendererProcessSortIndex);
 122
 123   const CommandLine& parsed_command_line = parameters.command_line;
 124
 125 #if defined(OS_MACOSX)
 126   base::mac::ScopedNSAutoreleasePool* pool = parameters.autorelease_pool;
 127 #endif  // OS_MACOSX
 128
 129 #if defined(OS_CHROMEOS)
 130   // As Zygote process starts up earlier than browser process gets its own
 131   // locale (at login time for Chrome OS), we have to set the ICU default
 132   // locale for renderer process here.
 133   // ICU locale will be used for fallback font selection etc.
 134   if (parsed_command_line.HasSwitch(switches::kLang)) {
 135     const std::string locale =
 136         parsed_command_line.GetSwitchValueASCII(switches::kLang);
 137     base::i18n::SetICUDefaultLocale(locale);
 138   }
 139 #endif
 140
 141 #if defined(OS_ANDROID)
 142   const int kMB = 1024 * 1024;
 143   size_t font_cache_limit =
 144       base::android::SysUtils::IsLowEndDevice() ? kMB : 8 * kMB;
 145   SkGraphics::SetFontCacheLimit(font_cache_limit);
 146 #endif
 147
 148   // This function allows pausing execution using the --renderer-startup-dialog
 149   // flag allowing us to attach a debugger.
 150   // Do not move this function down since that would mean we can't easily debug
 151   // whatever occurs before it.
 152   HandleRendererErrorTestParameters(parsed_command_line);
 153
 154   RendererMainPlatformDelegate platform(parameters);
 155
 156
 157   base::StatsCounterTimer stats_counter_timer("Content.RendererInit");
 158   base::StatsScope<base::StatsCounterTimer> startup_timer(stats_counter_timer);
 159
 160   RendererMessageLoopObserver task_observer;
 161 #if defined(OS_MACOSX)
 162   // As long as scrollbars on Mac are painted with Cocoa, the message pump
 163   // needs to be backed by a Foundation-level loop to process NSTimers. See
 164   // http://crbug.com/306348#c24 for details.
 165   scoped_ptr<base::MessagePump> pump(new base::MessagePumpNSRunLoop());
 166   base::MessageLoop main_message_loop(pump.Pass());
 167 #else
 168   // The main message loop of the renderer services doesn't have IO or UI tasks.
 169   base::MessageLoop main_message_loop;
 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         std::set<std::string>());
 201     DCHECK(result);
 202   }
 203
 204 #if defined(ENABLE_PLUGINS)
 205   // Load pepper plugins before engaging the sandbox.
 206   PepperPluginRegistry::GetInstance();
 207 #endif
 208 #if defined(ENABLE_WEBRTC)
 209   // Initialize WebRTC before engaging the sandbox.
 210   // NOTE: On linux, this call could already have been made from
 211   // zygote_main_linux.cc.  However, calling multiple times from the same thread
 212   // is OK.
 213   InitializeWebRtcModule();
 214 #endif
 215
 216   {
 217 #if defined(OS_WIN) || defined(OS_MACOSX)
 218     // TODO(markus): Check if it is OK to unconditionally move this
 219     // instruction down.
 220     RenderProcessImpl render_process;
 221     new RenderThreadImpl();
 222 #endif
 223     bool run_loop = true;
 224     if (!no_sandbox) {
 225       run_loop = platform.EnableSandbox();
 226     } else {
 227       LOG(ERROR) << "Running without renderer sandbox";
 228 #ifndef NDEBUG
 229       // For convenience, we print the stack traces for crashes.  When sandbox
 230       // is enabled, the in-process stack dumping is enabled as part of the
 231       // EnableSandbox() call.
 232       base::debug::EnableInProcessStackDumping();
 233 #endif
 234     }
 235 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 236     RenderProcessImpl render_process;
 237     new RenderThreadImpl();
 238 #endif
 239
 240     base::HighResolutionTimerManager hi_res_timer_manager;
 241
 242     platform.RunSandboxTests(no_sandbox);
 243
 244     startup_timer.Stop();  // End of Startup Time Measurement.
 245
 246     if (run_loop) {
 247 #if defined(OS_MACOSX)
 248       if (pool)
 249         pool->Recycle();
 250 #endif
 251       TRACE_EVENT_BEGIN_ETW("RendererMain.START_MSG_LOOP", 0, 0);
 252       base::MessageLoop::current()->Run();
 253       TRACE_EVENT_END_ETW("RendererMain.START_MSG_LOOP", 0, 0);
 254     }
 255   }
 256   platform.PlatformUninitialize();
 257   TRACE_EVENT_END_ETW("RendererMain", 0, "");
 258   return 0;
 259 }
 260
 261 }  // namespace content