text: // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #include "app/l10n_util.h"
  #include "app/resource_bundle.h"
  #include "base/command_line.h"
  #include "base/field_trial.h"
  #include "base/histogram.h"
  #include "base/message_loop.h"
  #include "base/path_service.h"
  #include "base/platform_thread.h"
  #include "base/process_util.h"
  #include "base/scoped_nsautorelease_pool.h"
  #include "base/stats_counters.h"
  #include "base/string_util.h"
  #include "base/system_monitor.h"
  #include "chrome/common/chrome_constants.h"
  #include "chrome/common/chrome_counters.h"
  #include "chrome/common/chrome_switches.h"
  #include "chrome/common/logging_chrome.h"
  #include "chrome/common/main_function_params.h"
  #include "chrome/renderer/renderer_main_platform_delegate.h"
  #include "chrome/renderer/render_process.h"
  #include "grit/chromium_strings.h"
  #include "grit/generated_resources.h"
  
  #if defined(OS_LINUX)
  #include "chrome/app/breakpad_linux.h"
  #endif
  
  // This function provides some ways to test crash and assertion handling
  // behavior of the renderer.
  static void HandleRendererErrorTestParameters(const CommandLine& command_line) {
    // This parameter causes an assertion.
    if (command_line.HasSwitch(switches::kRendererAssertTest)) {
      DCHECK(false);
    }
  
    // This parameter causes a null pointer crash (crash reporter trigger).
    if (command_line.HasSwitch(switches::kRendererCrashTest)) {
      int* bad_pointer = NULL;
      *bad_pointer = 0;
    }
  
    if (command_line.HasSwitch(switches::kRendererStartupDialog)) {
  #if defined(OS_WIN)
      std::wstring title = l10n_util::GetString(IDS_PRODUCT_NAME);
      std::wstring message = L"renderer starting with pid: ";
      message += IntToWString(base::GetCurrentProcId());
      title += L" renderer";  // makes attaching to process easier
      ::MessageBox(NULL, message.c_str(), title.c_str(),
                   MB_OK | MB_SETFOREGROUND);
  #elif defined(OS_MACOSX)
      // TODO(playmobil): In the long term, overriding this flag doesn't seem
      // right, either use our own flag or open a dialog we can use.
      // This is just to ease debugging in the interim.
      LOG(WARNING) << "Renderer ("
                   << getpid()
                   << ") paused waiting for debugger to attach @ pid";
      pause();
  #endif  // defined(OS_MACOSX)
    }
  }
  
  // mainline routine for running as the Renderer process
  int RendererMain(const MainFunctionParams& parameters) {
    const CommandLine& parsed_command_line = parameters.command_line_;
    base::ScopedNSAutoreleasePool* pool = parameters.autorelease_pool_;
  
  #if defined(OS_LINUX)
    // Needs to be called after we have chrome::DIR_USER_DATA.
    InitCrashReporter();
  #endif
  
    // This function allows pausing execution using the --renderer-startup-dialog
    // flag allowing us to attach a debugger.
    // Do not move this function down since that would mean we can't easily debug
    // whatever occurs before it.
    HandleRendererErrorTestParameters(parsed_command_line);
  
    RendererMainPlatformDelegate platform(parameters);
  
    StatsScope<StatsCounterTimer>
        startup_timer(chrome::Counters::renderer_main());
  
    // The main thread of the renderer services IO.
    MessageLoopForIO main_message_loop;
    std::wstring app_name = chrome::kBrowserAppName;
    PlatformThread::SetName(WideToASCII(app_name + L"_RendererMain").c_str());
  
    // Initialize the SystemMonitor
    base::SystemMonitor::Start();
  
    platform.PlatformInitialize();
  
    bool no_sandbox = parsed_command_line.HasSwitch(switches::kNoSandbox);
    platform.InitSandboxTests(no_sandbox);
  
    // Initialize histogram statistics gathering system.
    // Don't create StatisticsRecorder in the single process mode.
    scoped_ptr<StatisticsRecorder> statistics;
    if (!StatisticsRecorder::WasStarted()) {
      statistics.reset(new StatisticsRecorder());
    }
  
    // Initialize statistical testing infrastructure.
    FieldTrialList field_trial;
    // Ensure any field trials in browser are reflected into renderer.
    if (parsed_command_line.HasSwitch(switches::kForceFieldTestNameAndValue)) {
      std::string persistent(WideToASCII(parsed_command_line.GetSwitchValue(
          switches::kForceFieldTestNameAndValue)));
      bool ret = field_trial.StringAugmentsState(persistent);
      DCHECK(ret);
    }
  
    {
      RenderProcess render_process;
      bool run_loop = true;
      if (!no_sandbox) {
        run_loop = platform.EnableSandbox();
      }
  
      platform.RunSandboxTests();
  
      startup_timer.Stop();  // End of Startup Time Measurement.
  
      if (run_loop) {
        // Load the accelerator table from the browser executable and tell the
        // message loop to use it when translating messages.
        if (pool) pool->Recycle();
        MessageLoop::current()->Run();
      }
    }
    platform.PlatformUninitialize();
    return 0;
  }
  