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/render_process_impl.h"
  30 #include "content/renderer/render_thread_impl.h"
  31 #include "content/renderer/renderer_main_platform_delegate.h"
  32 #include "ui/base/ui_base_switches.h"
  33
  34 #if defined(OS_ANDROID)
  35 #include "base/android/library_loader/library_loader_hooks.h"
  36 #include "third_party/skia/include/core/SkGraphics.h"
  37 #endif  // OS_ANDROID
  38
  39 #if defined(OS_MACOSX)
  40 #include <Carbon/Carbon.h>
  41 #include <signal.h>
  42 #include <unistd.h>
  43
  44 #include "base/mac/mac_util.h"
  45 #include "base/mac/scoped_nsautorelease_pool.h"
  46 #include "base/message_loop/message_pump_mac.h"
  47 #include "third_party/WebKit/public/web/WebView.h"
  48 #endif  // OS_MACOSX
  49
  50 #if defined(ENABLE_PLUGINS)
  51 #include "content/renderer/pepper/pepper_plugin_registry.h"
  52 #endif
  53
  54 #if defined(ENABLE_WEBRTC)
  55 #include "third_party/libjingle/overrides/init_webrtc.h"
  56 #endif
  57
  58 namespace content {
  59 namespace {
  60 // This function provides some ways to test crash and assertion handling
  61 // behavior of the renderer.
  62 static void HandleRendererErrorTestParameters(const CommandLine& command_line) {
  63   if (command_line.HasSwitch(switches::kWaitForDebugger))
  64     base::debug::WaitForDebugger(60, true);
  65
  66   if (command_line.HasSwitch(switches::kRendererStartupDialog))
  67     ChildProcess::WaitForDebugger("Renderer");
  68
  69   // This parameter causes an assertion.
  70   if (command_line.HasSwitch(switches::kRendererAssertTest)) {
  71     DCHECK(false);
  72   }
  73 }
  74
  75 // This is a simplified version of the browser Jankometer, which measures
  76 // the processing time of tasks on the render thread.
  77 class RendererMessageLoopObserver : public base::MessageLoop::TaskObserver {
  78  public:
  79   RendererMessageLoopObserver()
  80       : process_times_(base::Histogram::FactoryGet(
  81             "Chrome.ProcMsgL RenderThread",
  82             1, 3600000, 50, base::Histogram::kUmaTargetedHistogramFlag)) {}
  83   virtual ~RendererMessageLoopObserver() {}
  84
  85   virtual void WillProcessTask(const base::PendingTask& pending_task) override {
  86     begin_process_message_ = base::TimeTicks::Now();
  87   }
  88
  89   virtual void DidProcessTask(const base::PendingTask& pending_task) override {
  90     if (!begin_process_message_.is_null())
  91       process_times_->AddTime(base::TimeTicks::Now() - begin_process_message_);
  92   }
  93
  94  private:
  95   base::TimeTicks begin_process_message_;
  96   base::HistogramBase* const process_times_;
  97   DISALLOW_COPY_AND_ASSIGN(RendererMessageLoopObserver);
  98 };
  99
 100 }  // namespace
 101
 102 // mainline routine for running as the Renderer process
 103 int RendererMain(const MainFunctionParams& parameters) {
 104   TRACE_EVENT_BEGIN_ETW("RendererMain", 0, "");
 105   base::debug::TraceLog::GetInstance()->SetProcessName("Renderer");
 106   base::debug::TraceLog::GetInstance()->SetProcessSortIndex(
 107       kTraceEventRendererProcessSortIndex);
 108
 109   const CommandLine& parsed_command_line = parameters.command_line;
 110
 111 #if defined(OS_MACOSX)
 112   base::mac::ScopedNSAutoreleasePool* pool = parameters.autorelease_pool;
 113 #endif  // OS_MACOSX
 114
 115 #if defined(OS_CHROMEOS)
 116   // As Zygote process starts up earlier than browser process gets its own
 117   // locale (at login time for Chrome OS), we have to set the ICU default
 118   // locale for renderer process here.
 119   // ICU locale will be used for fallback font selection etc.
 120   if (parsed_command_line.HasSwitch(switches::kLang)) {
 121     const std::string locale =
 122         parsed_command_line.GetSwitchValueASCII(switches::kLang);
 123     base::i18n::SetICUDefaultLocale(locale);
 124   }
 125 #endif
 126
 127 #if defined(OS_ANDROID)
 128   const int kMB = 1024 * 1024;
 129   size_t font_cache_limit =
 130       base::SysInfo::IsLowEndDevice() ? kMB : 8 * kMB;
 131   SkGraphics::SetFontCacheLimit(font_cache_limit);
 132 #endif
 133
 134   // This function allows pausing execution using the --renderer-startup-dialog
 135   // flag allowing us to attach a debugger.
 136   // Do not move this function down since that would mean we can't easily debug
 137   // whatever occurs before it.
 138   HandleRendererErrorTestParameters(parsed_command_line);
 139
 140   RendererMainPlatformDelegate platform(parameters);
 141
 142
 143   base::StatsCounterTimer stats_counter_timer("Content.RendererInit");
 144   base::StatsScope<base::StatsCounterTimer> startup_timer(stats_counter_timer);
 145
 146   RendererMessageLoopObserver task_observer;
 147 #if defined(OS_MACOSX)
 148   // As long as scrollbars on Mac are painted with Cocoa, the message pump
 149   // needs to be backed by a Foundation-level loop to process NSTimers. See
 150   // http://crbug.com/306348#c24 for details.
 151   scoped_ptr<base::MessagePump> pump(new base::MessagePumpNSRunLoop());
 152   base::MessageLoop main_message_loop(pump.Pass());
 153 #else
 154   // The main message loop of the renderer services doesn't have IO or UI tasks.
 155   base::MessageLoop main_message_loop;
 156 #endif
 157   main_message_loop.AddTaskObserver(&task_observer);
 158
 159   base::PlatformThread::SetName("CrRendererMain");
 160
 161   bool no_sandbox = parsed_command_line.HasSwitch(switches::kNoSandbox);
 162
 163   // Initialize histogram statistics gathering system.
 164   base::StatisticsRecorder::Initialize();
 165
 166 #if defined(OS_ANDROID)
 167   // If we have a pending chromium android linker histogram, record it.
 168   base::android::RecordChromiumAndroidLinkerRendererHistogram();
 169 #endif
 170
 171   // Initialize statistical testing infrastructure.  We set the entropy provider
 172   // to NULL to disallow the renderer process from creating its own one-time
 173   // randomized trials; they should be created in the browser process.
 174   base::FieldTrialList field_trial_list(NULL);
 175   // Ensure any field trials in browser are reflected into renderer.
 176   if (parsed_command_line.HasSwitch(switches::kForceFieldTrials)) {
 177     // Field trials are created in an "activated" state to ensure they get
 178     // reported in crash reports.
 179     bool result = base::FieldTrialList::CreateTrialsFromString(
 180         parsed_command_line.GetSwitchValueASCII(switches::kForceFieldTrials),
 181         base::FieldTrialList::ACTIVATE_TRIALS,
 182         std::set<std::string>());
 183     DCHECK(result);
 184   }
 185
 186   // PlatformInitialize uses FieldTrials, so this must happen later.
 187   platform.PlatformInitialize();
 188
 189 #if defined(ENABLE_PLUGINS)
 190   // Load pepper plugins before engaging the sandbox.
 191   PepperPluginRegistry::GetInstance();
 192 #endif
 193 #if defined(ENABLE_WEBRTC)
 194   // Initialize WebRTC before engaging the sandbox.
 195   // NOTE: On linux, this call could already have been made from
 196   // zygote_main_linux.cc.  However, calling multiple times from the same thread
 197   // is OK.
 198   InitializeWebRtcModule();
 199 #endif
 200
 201   {
 202 #if defined(OS_WIN) || defined(OS_MACOSX)
 203     // TODO(markus): Check if it is OK to unconditionally move this
 204     // instruction down.
 205     RenderProcessImpl render_process;
 206     new RenderThreadImpl();
 207 #endif
 208     bool run_loop = true;
 209     if (!no_sandbox) {
 210       run_loop = platform.EnableSandbox();
 211     } else {
 212       LOG(ERROR) << "Running without renderer sandbox";
 213 #ifndef NDEBUG
 214       // For convenience, we print the stack traces for crashes.  When sandbox
 215       // is enabled, the in-process stack dumping is enabled as part of the
 216       // EnableSandbox() call.
 217       base::debug::EnableInProcessStackDumping();
 218 #endif
 219     }
 220 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 221     RenderProcessImpl render_process;
 222     new RenderThreadImpl();
 223 #endif
 224
 225     base::HighResolutionTimerManager hi_res_timer_manager;
 226
 227     startup_timer.Stop();  // End of Startup Time Measurement.
 228
 229     if (run_loop) {
 230 #if defined(OS_MACOSX)
 231       if (pool)
 232         pool->Recycle();
 233 #endif
 234       TRACE_EVENT_BEGIN_ETW("RendererMain.START_MSG_LOOP", 0, 0);
 235       base::MessageLoop::current()->Run();
 236       TRACE_EVENT_END_ETW("RendererMain.START_MSG_LOOP", 0, 0);
 237     }
 238   }
 239   platform.PlatformUninitialize();
 240   TRACE_EVENT_END_ETW("RendererMain", 0, "");
 241   return 0;
 242 }
 243
 244 }  // namespace content