content/worker/worker_main.cc

   1 // Copyright (c) 2011 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/hi_res_timer_manager.h"
   8 #include "base/message_loop.h"
   9 #include "base/string_util.h"
  10 #include "base/system_monitor/system_monitor.h"
  11 #include "base/threading/platform_thread.h"
  12 #include "content/common/child_process.h"
  13 #include "content/public/common/main_function_params.h"
  14 #include "content/public/common/sandbox_init.h"
  15 #include "content/worker/worker_thread.h"
  16
  17 #if defined(OS_WIN)
  18 #include "sandbox/win/src/sandbox.h"
  19 #endif
  20
  21 namespace content {
  22
  23 // Mainline routine for running as the worker process.
  24 int WorkerMain(const MainFunctionParams& parameters) {
  25   // The main message loop of the worker process.
  26   MessageLoop main_message_loop;
  27   base::PlatformThread::SetName("CrWorkerMain");
  28
  29   base::SystemMonitor system_monitor;
  30   HighResolutionTimerManager hi_res_timer_manager;
  31
  32 #if defined(OS_WIN)
  33   sandbox::TargetServices* target_services =
  34       parameters.sandbox_info->target_services;
  35   if (!target_services)
  36     return false;
  37
  38   // Cause advapi32 to load before the sandbox is turned on.
  39   unsigned int dummy_rand;
  40   rand_s(&dummy_rand);
  41   // Warm up language subsystems before the sandbox is turned on.
  42   ::GetUserDefaultLangID();
  43   ::GetUserDefaultLCID();
  44
  45   target_services->LowerToken();
  46 #elif defined(OS_MAC)
  47   // On OS X, if the sandbox fails to initialize, something has gone terribly
  48   // wrong and we should die.
  49   CHECK(InitializeSandbox());
  50 #elif defined(OS_LINUX)
  51   // On Linux, the sandbox must be initialized early, before any thread is
  52   // created.
  53   InitializeSandbox();
  54 #endif
  55
  56   ChildProcess worker_process;
  57   worker_process.set_main_thread(new WorkerThread());
  58
  59   const CommandLine& parsed_command_line = parameters.command_line;
  60   if (parsed_command_line.HasSwitch(switches::kWaitForDebugger)) {
  61     ChildProcess::WaitForDebugger("Worker");
  62   }
  63
  64   // Load the accelerator table from the browser executable and tell the
  65   // message loop to use it when translating messages.
  66   MessageLoop::current()->Run();
  67
  68   return 0;
  69 }
  70
  71 }  // namespace content