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