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/leak_annotations.h"
   9 #include "base/debug/stack_trace.h"
  10 #include "base/i18n/rtl.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/pending_task.h"
  16 #include "base/strings/string_util.h"
  17 #include "base/sys_info.h"
  18 #include "base/threading/platform_thread.h"
  19 #include "base/timer/hi_res_timer_manager.h"
  20 #include "base/trace_event/trace_event.h"
  21 #include "components/scheduler/renderer/renderer_scheduler.h"
  22 #include "content/child/child_process.h"
  23 #include "content/common/content_constants_internal.h"
  24 #include "content/public/common/content_switches.h"
  25 #include "content/public/common/main_function_params.h"
  26 #include "content/public/renderer/content_renderer_client.h"
  27 #include "content/renderer/render_process_impl.h"
  28 #include "content/renderer/render_thread_impl.h"
  29 #include "content/renderer/renderer_main_platform_delegate.h"
  30 #include "third_party/skia/include/core/SkGraphics.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 #endif  // OS_ANDROID
  36
  37 #if defined(OS_MACOSX)
  38 #include <Carbon/Carbon.h>
  39 #include <signal.h>
  40 #include <unistd.h>
  41
  42 #include "base/mac/scoped_nsautorelease_pool.h"
  43 #include "base/message_loop/message_pump_mac.h"
  44 #include "third_party/WebKit/public/web/WebView.h"
  45 #endif  // OS_MACOSX
  46
  47 #if defined(ENABLE_PLUGINS)
  48 #include "content/renderer/pepper/pepper_plugin_registry.h"
  49 #endif
  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(
  60     const base::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
  68 }  // namespace
  69
  70 // mainline routine for running as the Renderer process
  71 int RendererMain(const MainFunctionParams& parameters) {
  72   TRACE_EVENT_BEGIN_ETW("RendererMain", 0, "");
  73   base::trace_event::TraceLog::GetInstance()->SetProcessName("Renderer");
  74   base::trace_event::TraceLog::GetInstance()->SetProcessSortIndex(
  75       kTraceEventRendererProcessSortIndex);
  76
  77   const base::CommandLine& parsed_command_line = parameters.command_line;
  78
  79 #if defined(OS_MACOSX)
  80   base::mac::ScopedNSAutoreleasePool* pool = parameters.autorelease_pool;
  81 #endif  // OS_MACOSX
  82
  83 #if defined(OS_CHROMEOS)
  84   // As Zygote process starts up earlier than browser process gets its own
  85   // locale (at login time for Chrome OS), we have to set the ICU default
  86   // locale for renderer process here.
  87   // ICU locale will be used for fallback font selection etc.
  88   if (parsed_command_line.HasSwitch(switches::kLang)) {
  89     const std::string locale =
  90         parsed_command_line.GetSwitchValueASCII(switches::kLang);
  91     base::i18n::SetICUDefaultLocale(locale);
  92   }
  93 #endif
  94
  95   SkGraphics::Init();
  96 #if defined(OS_ANDROID)
  97   const int kMB = 1024 * 1024;
  98   size_t font_cache_limit =
  99       base::SysInfo::IsLowEndDevice() ? kMB : 8 * kMB;
 100   SkGraphics::SetFontCacheLimit(font_cache_limit);
 101 #endif
 102
 103   // This function allows pausing execution using the --renderer-startup-dialog
 104   // flag allowing us to attach a debugger.
 105   // Do not move this function down since that would mean we can't easily debug
 106   // whatever occurs before it.
 107   HandleRendererErrorTestParameters(parsed_command_line);
 108
 109   RendererMainPlatformDelegate platform(parameters);
 110 #if defined(OS_MACOSX)
 111   // As long as scrollbars on Mac are painted with Cocoa, the message pump
 112   // needs to be backed by a Foundation-level loop to process NSTimers. See
 113   // http://crbug.com/306348#c24 for details.
 114   scoped_ptr<base::MessagePump> pump(new base::MessagePumpNSRunLoop());
 115   scoped_ptr<base::MessageLoop> main_message_loop(
 116       new base::MessageLoop(pump.Pass()));
 117 #else
 118   // The main message loop of the renderer services doesn't have IO or UI tasks.
 119   scoped_ptr<base::MessageLoop> main_message_loop(new base::MessageLoop());
 120 #endif
 121
 122   base::PlatformThread::SetName("CrRendererMain");
 123   scoped_ptr<scheduler::RendererScheduler> renderer_scheduler(
 124       scheduler::RendererScheduler::Create());
 125
 126   bool no_sandbox = parsed_command_line.HasSwitch(switches::kNoSandbox);
 127
 128   // Initialize histogram statistics gathering system.
 129   base::StatisticsRecorder::Initialize();
 130
 131 #if defined(OS_ANDROID)
 132   // If we have a pending chromium android linker histogram, record it.
 133   base::android::RecordChromiumAndroidLinkerRendererHistogram();
 134 #endif
 135
 136   // Initialize statistical testing infrastructure.  We set the entropy provider
 137   // to NULL to disallow the renderer process from creating its own one-time
 138   // randomized trials; they should be created in the browser process.
 139   base::FieldTrialList field_trial_list(NULL);
 140   // Ensure any field trials in browser are reflected into renderer.
 141   if (parsed_command_line.HasSwitch(switches::kForceFieldTrials)) {
 142     bool result = base::FieldTrialList::CreateTrialsFromString(
 143         parsed_command_line.GetSwitchValueASCII(switches::kForceFieldTrials),
 144         base::FieldTrialList::DONT_ACTIVATE_TRIALS,
 145         std::set<std::string>());
 146     DCHECK(result);
 147   }
 148
 149   // PlatformInitialize uses FieldTrials, so this must happen later.
 150   platform.PlatformInitialize();
 151
 152 #if defined(ENABLE_PLUGINS)
 153   // Load pepper plugins before engaging the sandbox.
 154   PepperPluginRegistry::GetInstance();
 155 #endif
 156 #if defined(ENABLE_WEBRTC)
 157   // Initialize WebRTC before engaging the sandbox.
 158   // NOTE: On linux, this call could already have been made from
 159   // zygote_main_linux.cc.  However, calling multiple times from the same thread
 160   // is OK.
 161   InitializeWebRtcModule();
 162 #endif
 163
 164   {
 165 #if defined(OS_WIN) || defined(OS_MACOSX)
 166     // TODO(markus): Check if it is OK to unconditionally move this
 167     // instruction down.
 168     RenderProcessImpl render_process;
 169     RenderThreadImpl::Create(main_message_loop.Pass(),
 170                              renderer_scheduler.Pass());
 171 #endif
 172     bool run_loop = true;
 173     if (!no_sandbox) {
 174       run_loop = platform.EnableSandbox();
 175     } else {
 176       LOG(ERROR) << "Running without renderer sandbox";
 177 #ifndef NDEBUG
 178       // For convenience, we print the stack traces for crashes.  When sandbox
 179       // is enabled, the in-process stack dumping is enabled as part of the
 180       // EnableSandbox() call.
 181       base::debug::EnableInProcessStackDumping();
 182 #endif
 183     }
 184 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 185     RenderProcessImpl render_process;
 186     RenderThreadImpl::Create(main_message_loop.Pass(),
 187                              renderer_scheduler.Pass());
 188 #endif
 189     base::HighResolutionTimerManager hi_res_timer_manager;
 190
 191     if (run_loop) {
 192 #if defined(OS_MACOSX)
 193       if (pool)
 194         pool->Recycle();
 195 #endif
 196       TRACE_EVENT_BEGIN_ETW("RendererMain.START_MSG_LOOP", 0, 0);
 197       base::MessageLoop::current()->Run();
 198       TRACE_EVENT_END_ETW("RendererMain.START_MSG_LOOP", 0, 0);
 199     }
 200 #if defined(LEAK_SANITIZER)
 201     // Run leak detection before RenderProcessImpl goes out of scope. This helps
 202     // ignore shutdown-only leaks.
 203     __lsan_do_leak_check();
 204 #endif
 205   }
 206   platform.PlatformUninitialize();
 207   TRACE_EVENT_END_ETW("RendererMain", 0, "");
 208   return 0;
 209 }
 210
 211 }  // namespace content