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      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 "content/public/browser/browser_main_runner.h"
      6 
      7 #include "base/allocator/allocator_shim.h"
      8 #include "base/base_switches.h"
      9 #include "base/command_line.h"
     10 #include "base/debug/leak_annotations.h"
     11 #include "base/debug/trace_event.h"
     12 #include "base/logging.h"
     13 #include "base/metrics/histogram.h"
     14 #include "base/metrics/statistics_recorder.h"
     15 #include "content/browser/browser_main_loop.h"
     16 #include "content/browser/browser_shutdown_profile_dumper.h"
     17 #include "content/browser/notification_service_impl.h"
     18 #include "content/public/common/content_switches.h"
     19 #include "content/public/common/main_function_params.h"
     20 #include "ui/base/ime/input_method_initializer.h"
     21 
     22 #if defined(OS_WIN)
     23 #include "base/win/windows_version.h"
     24 #include "ui/base/win/scoped_ole_initializer.h"
     25 #endif
     26 
     27 bool g_exited_main_message_loop = false;
     28 
     29 namespace content {
     30 
     31 class BrowserMainRunnerImpl : public BrowserMainRunner {
     32  public:
     33   BrowserMainRunnerImpl()
     34       : initialization_started_(false), is_shutdown_(false) {}
     35 
     36   virtual ~BrowserMainRunnerImpl() {
     37     if (initialization_started_ && !is_shutdown_)
     38       Shutdown();
     39   }
     40 
     41   virtual int Initialize(const MainFunctionParams& parameters) OVERRIDE {
     42     TRACE_EVENT0("startup", "BrowserMainRunnerImpl::Initialize");
     43     // On Android we normally initialize the browser in a series of UI thread
     44     // tasks. While this is happening a second request can come from the OS or
     45     // another application to start the browser. If this happens then we must
     46     // not run these parts of initialization twice.
     47     if (!initialization_started_) {
     48       initialization_started_ = true;
     49 
     50 #if !defined(OS_IOS)
     51       if (parameters.command_line.HasSwitch(switches::kWaitForDebugger))
     52         base::debug::WaitForDebugger(60, true);
     53 #endif
     54 
     55 #if defined(OS_WIN)
     56       if (base::win::GetVersion() < base::win::VERSION_VISTA) {
     57         // When "Extend support of advanced text services to all programs"
     58         // (a.k.a. Cicero Unaware Application Support; CUAS) is enabled on
     59         // Windows XP and handwriting modules shipped with Office 2003 are
     60         // installed, "penjpn.dll" and "skchui.dll" will be loaded and then
     61         // crash unless a user installs Office 2003 SP3. To prevent these
     62         // modules from being loaded, disable TSF entirely. crbug.com/160914.
     63         // TODO(yukawa): Add a high-level wrapper for this instead of calling
     64         // Win32 API here directly.
     65         ImmDisableTextFrameService(static_cast<DWORD>(-1));
     66       }
     67 #endif  // OS_WIN
     68 
     69       base::StatisticsRecorder::Initialize();
     70 
     71       notification_service_.reset(new NotificationServiceImpl);
     72 
     73 #if defined(OS_WIN)
     74       // Ole must be initialized before starting message pump, so that TSF
     75       // (Text Services Framework) module can interact with the message pump
     76       // on Windows 8 Metro mode.
     77       ole_initializer_.reset(new ui::ScopedOleInitializer);
     78 #endif  // OS_WIN
     79 
     80       main_loop_.reset(new BrowserMainLoop(parameters));
     81 
     82       main_loop_->Init();
     83 
     84       main_loop_->EarlyInitialization();
     85 
     86       // Must happen before we try to use a message loop or display any UI.
     87       if (!main_loop_->InitializeToolkit())
     88         return 1;
     89 
     90       main_loop_->MainMessageLoopStart();
     91 
     92 // WARNING: If we get a WM_ENDSESSION, objects created on the stack here
     93 // are NOT deleted. If you need something to run during WM_ENDSESSION add it
     94 // to browser_shutdown::Shutdown or BrowserProcess::EndSession.
     95 
     96 #if defined(OS_WIN) && !defined(NO_TCMALLOC)
     97       // When linking shared libraries, NO_TCMALLOC is defined, and dynamic
     98       // allocator selection is not supported.
     99 
    100       // Make this call before going multithreaded, or spawning any
    101       // subprocesses.
    102       base::allocator::SetupSubprocessAllocator();
    103 #endif
    104       ui::InitializeInputMethod();
    105     }
    106     main_loop_->CreateStartupTasks();
    107     int result_code = main_loop_->GetResultCode();
    108     if (result_code > 0)
    109       return result_code;
    110 
    111     // Return -1 to indicate no early termination.
    112     return -1;
    113   }
    114 
    115   virtual int Run() OVERRIDE {
    116     DCHECK(initialization_started_);
    117     DCHECK(!is_shutdown_);
    118     main_loop_->RunMainMessageLoopParts();
    119     return main_loop_->GetResultCode();
    120   }
    121 
    122   virtual void Shutdown() OVERRIDE {
    123     DCHECK(initialization_started_);
    124     DCHECK(!is_shutdown_);
    125 #ifdef LEAK_SANITIZER
    126     // Invoke leak detection now, to avoid dealing with shutdown-only leaks.
    127     // Normally this will have already happened in
    128     // BroserProcessImpl::ReleaseModule(), so this call has no effect. This is
    129     // only for processes which do not instantiate a BrowserProcess.
    130     // If leaks are found, the process will exit here.
    131     __lsan_do_leak_check();
    132 #endif
    133     // The shutdown tracing got enabled in AttemptUserExit earlier, but someone
    134     // needs to write the result to disc. For that a dumper needs to get created
    135     // which will dump the traces to disc when it gets destroyed.
    136     const CommandLine& command_line = *CommandLine::ForCurrentProcess();
    137     scoped_ptr<BrowserShutdownProfileDumper> profiler;
    138     if (command_line.HasSwitch(switches::kTraceShutdown))
    139       profiler.reset(new BrowserShutdownProfileDumper());
    140 
    141     {
    142       // The trace event has to stay between profiler creation and destruction.
    143       TRACE_EVENT0("shutdown", "BrowserMainRunner");
    144       g_exited_main_message_loop = true;
    145 
    146       main_loop_->ShutdownThreadsAndCleanUp();
    147 
    148       ui::ShutdownInputMethod();
    149   #if defined(OS_WIN)
    150       ole_initializer_.reset(NULL);
    151   #endif
    152   #if defined(OS_ANDROID)
    153       // Forcefully terminates the RunLoop inside MessagePumpForUI, ensuring
    154       // proper shutdown for content_browsertests. Shutdown() is not used by
    155       // the actual browser.
    156       base::MessageLoop::current()->QuitNow();
    157   #endif
    158       main_loop_.reset(NULL);
    159 
    160       notification_service_.reset(NULL);
    161 
    162       is_shutdown_ = true;
    163     }
    164   }
    165 
    166  protected:
    167   // True if we have started to initialize the runner.
    168   bool initialization_started_;
    169 
    170   // True if the runner has been shut down.
    171   bool is_shutdown_;
    172 
    173   scoped_ptr<NotificationServiceImpl> notification_service_;
    174   scoped_ptr<BrowserMainLoop> main_loop_;
    175 #if defined(OS_WIN)
    176   scoped_ptr<ui::ScopedOleInitializer> ole_initializer_;
    177 #endif
    178 
    179   DISALLOW_COPY_AND_ASSIGN(BrowserMainRunnerImpl);
    180 };
    181 
    182 // static
    183 BrowserMainRunner* BrowserMainRunner::Create() {
    184   return new BrowserMainRunnerImpl();
    185 }
    186 
    187 }  // namespace content
    188