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