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/message_loop/message_loop.h"
   8 #include "base/strings/string_util.h"
   9 #include "base/threading/platform_thread.h"
  10 #include "base/timer/hi_res_timer_manager.h"
  11 #include "content/child/child_process.h"
  12 #include "content/common/sandbox_linux/sandbox_linux.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 #if defined(OS_MACOSX)
  22 #include "content/common/sandbox_mac.h"
  23 #endif
  24
  25 namespace content {
  26
  27 // Mainline routine for running as the worker process.
  28 int WorkerMain(const MainFunctionParams& parameters) {
  29   // The main message loop of the worker process.
  30   base::MessageLoop main_message_loop;
  31   base::PlatformThread::SetName("CrWorkerMain");
  32   base::debug::TraceLog::GetInstance()->SetProcessName("Shared Web Worker");
  33
  34 #if defined(OS_WIN)
  35   sandbox::TargetServices* target_services =
  36       parameters.sandbox_info->target_services;
  37   if (!target_services)
  38     return false;
  39
  40   // Cause advapi32 to load before the sandbox is turned on.
  41   unsigned int dummy_rand;
  42   rand_s(&dummy_rand);
  43   // Warm up language subsystems before the sandbox is turned on.
  44   ::GetUserDefaultLangID();
  45   ::GetUserDefaultLCID();
  46
  47   target_services->LowerToken();
  48 #elif defined(OS_MACOSX)
  49   // Sandbox should already be activated at this point.
  50   CHECK(Sandbox::SandboxIsCurrentlyActive());
  51 #elif defined(OS_LINUX)
  52   // On Linux, the sandbox must be initialized early, before any thread is
  53   // created.
  54   LinuxSandbox::InitializeSandbox();
  55 #endif
  56
  57   ChildProcess worker_process;
  58   worker_process.set_main_thread(new WorkerThread());
  59
  60   base::HighResolutionTimerManager hi_res_timer_manager;
  61
  62   const CommandLine& parsed_command_line = parameters.command_line;
  63   if (parsed_command_line.HasSwitch(switches::kWaitForDebugger)) {
  64     ChildProcess::WaitForDebugger("Worker");
  65   }
  66
  67   // Load the accelerator table from the browser executable and tell the
  68   // message loop to use it when translating messages.
  69   base::MessageLoop::current()->Run();
  70
  71   return 0;
  72 }
  73
  74 }  // namespace content