content/browser/browser_main_runner.cc

   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/base_switches.h"
   8 #include "base/command_line.h"
   9 #include "base/debug/leak_annotations.h"
  10 #include "base/logging.h"
  11 #include "base/metrics/histogram.h"
  12 #include "base/metrics/statistics_recorder.h"
  13 #include "base/profiler/scoped_profile.h"
  14 #include "base/profiler/scoped_tracker.h"
  15 #include "base/trace_event/trace_event.h"
  16 #include "base/tracked_objects.h"
  17 #include "components/tracing/trace_config_file.h"
  18 #include "components/tracing/tracing_switches.h"
  19 #include "content/browser/browser_main_loop.h"
  20 #include "content/browser/browser_shutdown_profile_dumper.h"
  21 #include "content/browser/notification_service_impl.h"
  22 #include "content/public/browser/tracing_controller.h"
  23 #include "content/public/common/content_switches.h"
  24 #include "content/public/common/main_function_params.h"
  25 #include "third_party/skia/include/core/SkGraphics.h"
  26 #include "ui/base/ime/input_method_initializer.h"
  27
  28 #if defined(OS_ANDROID)
  29 #include "content/browser/android/tracing_controller_android.h"
  30 #endif
  31
  32 #if defined(OS_WIN)
  33 #include "base/win/win_util.h"
  34 #include "base/win/windows_version.h"
  35 #include "net/cert/sha256_legacy_support_win.h"
  36 #include "sandbox/win/src/sidestep/preamble_patcher.h"
  37 #include "ui/base/win/scoped_ole_initializer.h"
  38 #include "ui/gfx/switches.h"
  39 #include "ui/gfx/win/direct_write.h"
  40 #endif
  41
  42 namespace content {
  43
  44 namespace {
  45
  46 bool g_exited_main_message_loop = false;
  47
  48 #if defined(OS_WIN)
  49 #if !defined(_WIN64)
  50 // Pointer to the original CryptVerifyCertificateSignatureEx function.
  51 net::sha256_interception::CryptVerifyCertificateSignatureExFunc
  52     g_real_crypt_verify_signature_stub = NULL;
  53
  54 // Stub function that is called whenever the Crypt32 function
  55 // CryptVerifyCertificateSignatureEx is called. It just defers to net to perform
  56 // the actual verification.
  57 BOOL WINAPI CryptVerifyCertificateSignatureExStub(
  58     HCRYPTPROV_LEGACY provider,
  59     DWORD encoding_type,
  60     DWORD subject_type,
  61     void* subject_data,
  62     DWORD issuer_type,
  63     void* issuer_data,
  64     DWORD flags,
  65     void* extra) {
  66   return net::sha256_interception::CryptVerifyCertificateSignatureExHook(
  67       g_real_crypt_verify_signature_stub, provider, encoding_type, subject_type,
  68       subject_data, issuer_type, issuer_data, flags, extra);
  69 }
  70 #endif  // !defined(_WIN64)
  71
  72 // If necessary, install an interception
  73 void InstallSha256LegacyHooks() {
  74 #if defined(_WIN64)
  75   // Interception on x64 is not supported.
  76   return;
  77 #else
  78   if (base::win::MaybeHasSHA256Support())
  79     return;
  80
  81   net::sha256_interception::CryptVerifyCertificateSignatureExFunc
  82       cert_verify_signature_ptr = reinterpret_cast<
  83           net::sha256_interception::CryptVerifyCertificateSignatureExFunc>(
  84               ::GetProcAddress(::GetModuleHandle(L"crypt32.dll"),
  85                                "CryptVerifyCertificateSignatureEx"));
  86   CHECK(cert_verify_signature_ptr);
  87
  88   DWORD old_protect = 0;
  89   if (!::VirtualProtect(cert_verify_signature_ptr, 5, PAGE_EXECUTE_READWRITE,
  90                         &old_protect)) {
  91     return;
  92   }
  93
  94   g_real_crypt_verify_signature_stub =
  95       reinterpret_cast<
  96           net::sha256_interception::CryptVerifyCertificateSignatureExFunc>(
  97               VirtualAllocEx(::GetCurrentProcess(), NULL,
  98                              sidestep::kMaxPreambleStubSize, MEM_COMMIT,
  99                              PAGE_EXECUTE_READWRITE));
 100   if (g_real_crypt_verify_signature_stub == NULL) {
 101     CHECK(::VirtualProtect(cert_verify_signature_ptr, 5, old_protect,
 102                            &old_protect));
 103     return;
 104   }
 105
 106   sidestep::SideStepError patch_result =
 107       sidestep::PreamblePatcher::Patch(
 108           cert_verify_signature_ptr, CryptVerifyCertificateSignatureExStub,
 109           g_real_crypt_verify_signature_stub, sidestep::kMaxPreambleStubSize);
 110   if (patch_result != sidestep::SIDESTEP_SUCCESS) {
 111     CHECK(::VirtualFreeEx(::GetCurrentProcess(),
 112                           g_real_crypt_verify_signature_stub, 0,
 113                           MEM_RELEASE));
 114     CHECK(::VirtualProtect(cert_verify_signature_ptr, 5, old_protect,
 115                            &old_protect));
 116     return;
 117   }
 118
 119   DWORD dummy = 0;
 120   CHECK(::VirtualProtect(cert_verify_signature_ptr, 5, old_protect, &dummy));
 121   CHECK(::VirtualProtect(g_real_crypt_verify_signature_stub,
 122                          sidestep::kMaxPreambleStubSize, old_protect,
 123                          &old_protect));
 124 #endif  // _WIN64
 125 }
 126 #endif  // OS_WIN
 127
 128 }  // namespace
 129
 130 class BrowserMainRunnerImpl : public BrowserMainRunner {
 131  public:
 132   BrowserMainRunnerImpl()
 133       : initialization_started_(false), is_shutdown_(false) {}
 134
 135   ~BrowserMainRunnerImpl() override {
 136     if (initialization_started_ && !is_shutdown_)
 137       Shutdown();
 138   }
 139
 140   int Initialize(const MainFunctionParams& parameters) override {
 141     // TODO(vadimt, yiyaoliu): Remove all tracked_objects references below once
 142     // crbug.com/453640 is fixed.
 143     tracked_objects::ThreadData::InitializeThreadContext("CrBrowserMain");
 144     TRACK_SCOPED_REGION(
 145         "Startup", "BrowserMainRunnerImpl::Initialize");
 146     TRACE_EVENT0("startup", "BrowserMainRunnerImpl::Initialize");
 147
 148     // On Android we normally initialize the browser in a series of UI thread
 149     // tasks. While this is happening a second request can come from the OS or
 150     // another application to start the browser. If this happens then we must
 151     // not run these parts of initialization twice.
 152     if (!initialization_started_) {
 153       initialization_started_ = true;
 154
 155       SkGraphics::Init();
 156
 157 #if !defined(OS_IOS)
 158       if (parameters.command_line.HasSwitch(switches::kWaitForDebugger))
 159         base::debug::WaitForDebugger(60, true);
 160 #endif
 161
 162 #if defined(OS_WIN)
 163       if (base::win::GetVersion() < base::win::VERSION_VISTA) {
 164         // When "Extend support of advanced text services to all programs"
 165         // (a.k.a. Cicero Unaware Application Support; CUAS) is enabled on
 166         // Windows XP and handwriting modules shipped with Office 2003 are
 167         // installed, "penjpn.dll" and "skchui.dll" will be loaded and then
 168         // crash unless a user installs Office 2003 SP3. To prevent these
 169         // modules from being loaded, disable TSF entirely. crbug.com/160914.
 170         // TODO(yukawa): Add a high-level wrapper for this instead of calling
 171         // Win32 API here directly.
 172         ImmDisableTextFrameService(static_cast<DWORD>(-1));
 173       }
 174       InstallSha256LegacyHooks();
 175 #endif  // OS_WIN
 176
 177       base::StatisticsRecorder::Initialize();
 178
 179       notification_service_.reset(new NotificationServiceImpl);
 180
 181 #if defined(OS_WIN)
 182       // Ole must be initialized before starting message pump, so that TSF
 183       // (Text Services Framework) module can interact with the message pump
 184       // on Windows 8 Metro mode.
 185       ole_initializer_.reset(new ui::ScopedOleInitializer);
 186       // Enable DirectWrite font rendering if needed.
 187       gfx::win::MaybeInitializeDirectWrite();
 188 #endif  // OS_WIN
 189
 190       main_loop_.reset(new BrowserMainLoop(parameters));
 191
 192       main_loop_->Init();
 193
 194       main_loop_->EarlyInitialization();
 195
 196       // Must happen before we try to use a message loop or display any UI.
 197       if (!main_loop_->InitializeToolkit())
 198         return 1;
 199
 200       main_loop_->PreMainMessageLoopStart();
 201       main_loop_->MainMessageLoopStart();
 202       main_loop_->PostMainMessageLoopStart();
 203
 204 // WARNING: If we get a WM_ENDSESSION, objects created on the stack here
 205 // are NOT deleted. If you need something to run during WM_ENDSESSION add it
 206 // to browser_shutdown::Shutdown or BrowserProcess::EndSession.
 207
 208       ui::InitializeInputMethod();
 209     }
 210     main_loop_->CreateStartupTasks();
 211     int result_code = main_loop_->GetResultCode();
 212     if (result_code > 0)
 213       return result_code;
 214
 215     // Return -1 to indicate no early termination.
 216     return -1;
 217   }
 218
 219   int Run() override {
 220     DCHECK(initialization_started_);
 221     DCHECK(!is_shutdown_);
 222     main_loop_->RunMainMessageLoopParts();
 223     return main_loop_->GetResultCode();
 224   }
 225
 226   void Shutdown() override {
 227     DCHECK(initialization_started_);
 228     DCHECK(!is_shutdown_);
 229 #ifdef LEAK_SANITIZER
 230     // Invoke leak detection now, to avoid dealing with shutdown-only leaks.
 231     // Normally this will have already happened in
 232     // BroserProcessImpl::ReleaseModule(), so this call has no effect. This is
 233     // only for processes which do not instantiate a BrowserProcess.
 234     // If leaks are found, the process will exit here.
 235     __lsan_do_leak_check();
 236 #endif
 237     // If startup tracing has not been finished yet, replace it's dumper
 238     // with special version, which would save trace file on exit (i.e.
 239     // startup tracing becomes a version of shutdown tracing).
 240     // There are two cases:
 241     // 1. Startup duration is not reached.
 242     // 2. Or startup duration is not specified for --trace-config-file flag.
 243     scoped_ptr<BrowserShutdownProfileDumper> startup_profiler;
 244     if (main_loop_->is_tracing_startup_for_duration()) {
 245       main_loop_->StopStartupTracingTimer();
 246       if (main_loop_->startup_trace_file() !=
 247           base::FilePath().AppendASCII("none")) {
 248         startup_profiler.reset(
 249             new BrowserShutdownProfileDumper(main_loop_->startup_trace_file()));
 250       }
 251     } else if (tracing::TraceConfigFile::GetInstance()->IsEnabled() &&
 252                TracingController::GetInstance()->IsRecording()) {
 253       base::FilePath result_file;
 254 #if defined(OS_ANDROID)
 255       TracingControllerAndroid::GenerateTracingFilePath(&result_file);
 256 #else
 257       result_file = tracing::TraceConfigFile::GetInstance()->GetResultFile();
 258 #endif
 259       startup_profiler.reset(new BrowserShutdownProfileDumper(result_file));
 260     }
 261
 262     // The shutdown tracing got enabled in AttemptUserExit earlier, but someone
 263     // needs to write the result to disc. For that a dumper needs to get created
 264     // which will dump the traces to disc when it gets destroyed.
 265     const base::CommandLine& command_line =
 266         *base::CommandLine::ForCurrentProcess();
 267     scoped_ptr<BrowserShutdownProfileDumper> shutdown_profiler;
 268     if (command_line.HasSwitch(switches::kTraceShutdown)) {
 269       shutdown_profiler.reset(new BrowserShutdownProfileDumper(
 270           BrowserShutdownProfileDumper::GetShutdownProfileFileName()));
 271     }
 272
 273     {
 274       // The trace event has to stay between profiler creation and destruction.
 275       TRACE_EVENT0("shutdown", "BrowserMainRunner");
 276       g_exited_main_message_loop = true;
 277
 278       main_loop_->ShutdownThreadsAndCleanUp();
 279
 280       ui::ShutdownInputMethod();
 281   #if defined(OS_WIN)
 282       ole_initializer_.reset(NULL);
 283   #endif
 284   #if defined(OS_ANDROID)
 285       // Forcefully terminates the RunLoop inside MessagePumpForUI, ensuring
 286       // proper shutdown for content_browsertests. Shutdown() is not used by
 287       // the actual browser.
 288       if (base::MessageLoop::current()->is_running())
 289         base::MessageLoop::current()->QuitNow();
 290   #endif
 291       main_loop_.reset(NULL);
 292
 293       notification_service_.reset(NULL);
 294
 295       is_shutdown_ = true;
 296     }
 297   }
 298
 299  protected:
 300   // True if we have started to initialize the runner.
 301   bool initialization_started_;
 302
 303   // True if the runner has been shut down.
 304   bool is_shutdown_;
 305
 306   scoped_ptr<NotificationServiceImpl> notification_service_;
 307   scoped_ptr<BrowserMainLoop> main_loop_;
 308 #if defined(OS_WIN)
 309   scoped_ptr<ui::ScopedOleInitializer> ole_initializer_;
 310 #endif
 311
 312  private:
 313   DISALLOW_COPY_AND_ASSIGN(BrowserMainRunnerImpl);
 314 };
 315
 316 // static
 317 BrowserMainRunner* BrowserMainRunner::Create() {
 318   return new BrowserMainRunnerImpl();
 319 }
 320
 321 // static
 322 bool BrowserMainRunner::ExitedMainMessageLoop() {
 323   return g_exited_main_message_loop;
 324 }
 325
 326 }  // namespace content