content/utility/utility_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/command_line.h"
   6 #include "base/debug/leak_annotations.h"
   7 #include "base/message_loop/message_loop.h"
   8 #include "base/threading/platform_thread.h"
   9 #include "base/timer/hi_res_timer_manager.h"
  10 #include "content/child/child_process.h"
  11 #include "content/common/sandbox_linux/sandbox_linux.h"
  12 #include "content/public/common/content_switches.h"
  13 #include "content/public/common/main_function_params.h"
  14 #include "content/public/common/sandbox_init.h"
  15 #include "content/utility/utility_thread_impl.h"
  16
  17 #if defined(OS_WIN)
  18 #include "base/rand_util.h"
  19 #include "sandbox/win/src/sandbox.h"
  20 #endif
  21
  22 namespace content {
  23
  24 // Mainline routine for running as the utility process.
  25 int UtilityMain(const MainFunctionParams& parameters) {
  26   // The main message loop of the utility process.
  27   base::MessageLoop main_message_loop;
  28   base::PlatformThread::SetName("CrUtilityMain");
  29
  30 #if defined(OS_LINUX)
  31   // Initializes the sandbox before any threads are created.
  32   // TODO(jorgelo): move this after GTK initialization when we enable a strict
  33   // Seccomp-BPF policy.
  34   if (parameters.zygote_child)
  35     LinuxSandbox::InitializeSandbox();
  36 #endif
  37
  38   ChildProcess utility_process;
  39   utility_process.set_main_thread(new UtilityThreadImpl());
  40
  41   base::HighResolutionTimerManager hi_res_timer_manager;
  42
  43 #if defined(OS_WIN)
  44   bool no_sandbox = parameters.command_line.HasSwitch(switches::kNoSandbox);
  45   if (!no_sandbox) {
  46     sandbox::TargetServices* target_services =
  47         parameters.sandbox_info->target_services;
  48     if (!target_services)
  49       return false;
  50     char buffer;
  51     // Ensure RtlGenRandom is warm before the token is lowered; otherwise,
  52     // base::RandBytes() will CHECK fail when v8 is initialized.
  53     base::RandBytes(&buffer, sizeof(buffer));
  54     target_services->LowerToken();
  55   }
  56 #endif
  57
  58   base::MessageLoop::current()->Run();
  59
  60 #if defined(LEAK_SANITIZER)
  61   // Invoke LeakSanitizer before shutting down the utility thread, to avoid
  62   // reporting shutdown-only leaks.
  63   __lsan_do_leak_check();
  64 #endif
  65
  66   return 0;
  67 }
  68
  69 }  // namespace content