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/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/win_util.h"
  24 #include "base/win/windows_version.h"
  25 #include "net/cert/sha256_legacy_support_win.h"
  26 #include "sandbox/win/src/sidestep/preamble_patcher.h"
  27 #include "skia/ext/fontmgr_default_win.h"
  28 #include "third_party/skia/include/ports/SkFontMgr.h"
  29 #include "third_party/skia/include/ports/SkTypeface_win.h"
  30 #include "ui/base/win/scoped_ole_initializer.h"
  31 #include "ui/gfx/switches.h"
  32 #include "ui/gfx/win/direct_write.h"
  33 #endif
  34
  35 bool g_exited_main_message_loop = false;
  36
  37 namespace content {
  38
  39 #if defined(OS_WIN)
  40 namespace {
  41
  42 // Pointer to the original CryptVerifyCertificateSignatureEx function.
  43 net::sha256_interception::CryptVerifyCertificateSignatureExFunc
  44     g_real_crypt_verify_signature_stub = NULL;
  45
  46 // Stub function that is called whenever the Crypt32 function
  47 // CryptVerifyCertificateSignatureEx is called. It just defers to net to perform
  48 // the actual verification.
  49 BOOL WINAPI CryptVerifyCertificateSignatureExStub(
  50     HCRYPTPROV_LEGACY provider,
  51     DWORD encoding_type,
  52     DWORD subject_type,
  53     void* subject_data,
  54     DWORD issuer_type,
  55     void* issuer_data,
  56     DWORD flags,
  57     void* extra) {
  58   return net::sha256_interception::CryptVerifyCertificateSignatureExHook(
  59       g_real_crypt_verify_signature_stub, provider, encoding_type, subject_type,
  60       subject_data, issuer_type, issuer_data, flags, extra);
  61 }
  62
  63 // If necessary, install an interception
  64 void InstallSha256LegacyHooks() {
  65 #if defined(_WIN64)
  66   // Interception on x64 is not supported.
  67   return;
  68 #else
  69   if (base::win::MaybeHasSHA256Support())
  70     return;
  71
  72   net::sha256_interception::CryptVerifyCertificateSignatureExFunc
  73       cert_verify_signature_ptr = reinterpret_cast<
  74           net::sha256_interception::CryptVerifyCertificateSignatureExFunc>(
  75               ::GetProcAddress(::GetModuleHandle(L"crypt32.dll"),
  76                                "CryptVerifyCertificateSignatureEx"));
  77   CHECK(cert_verify_signature_ptr);
  78
  79   DWORD old_protect = 0;
  80   if (!::VirtualProtect(cert_verify_signature_ptr, 5, PAGE_EXECUTE_READWRITE,
  81                         &old_protect)) {
  82     return;
  83   }
  84
  85   g_real_crypt_verify_signature_stub =
  86       reinterpret_cast<
  87           net::sha256_interception::CryptVerifyCertificateSignatureExFunc>(
  88               VirtualAllocEx(::GetCurrentProcess(), NULL,
  89                              sidestep::kMaxPreambleStubSize, MEM_COMMIT,
  90                              PAGE_EXECUTE_READWRITE));
  91   if (g_real_crypt_verify_signature_stub == NULL) {
  92     CHECK(::VirtualProtect(cert_verify_signature_ptr, 5, old_protect,
  93                            &old_protect));
  94     return;
  95   }
  96
  97   sidestep::SideStepError patch_result =
  98       sidestep::PreamblePatcher::Patch(
  99           cert_verify_signature_ptr, CryptVerifyCertificateSignatureExStub,
 100           g_real_crypt_verify_signature_stub, sidestep::kMaxPreambleStubSize);
 101   if (patch_result != sidestep::SIDESTEP_SUCCESS) {
 102     CHECK(::VirtualFreeEx(::GetCurrentProcess(),
 103                           g_real_crypt_verify_signature_stub, 0,
 104                           MEM_RELEASE));
 105     CHECK(::VirtualProtect(cert_verify_signature_ptr, 5, old_protect,
 106                            &old_protect));
 107     return;
 108   }
 109
 110   DWORD dummy = 0;
 111   CHECK(::VirtualProtect(cert_verify_signature_ptr, 5, old_protect, &dummy));
 112   CHECK(::VirtualProtect(g_real_crypt_verify_signature_stub,
 113                          sidestep::kMaxPreambleStubSize, old_protect,
 114                          &old_protect));
 115 #endif  // _WIN64
 116 }
 117
 118 void MaybeEnableDirectWriteFontRendering() {
 119   if (gfx::win::ShouldUseDirectWrite() &&
 120       CommandLine::ForCurrentProcess()->HasSwitch(
 121           switches::kEnableDirectWriteForUI) &&
 122       CommandLine::ForCurrentProcess()->HasSwitch(
 123           switches::kEnableHarfBuzzRenderText)) {
 124     SetDefaultSkiaFactory(SkFontMgr_New_DirectWrite(NULL));
 125   }
 126 }
 127
 128 }  // namespace
 129
 130 #endif  // OS_WIN
 131
 132 class BrowserMainRunnerImpl : public BrowserMainRunner {
 133  public:
 134   BrowserMainRunnerImpl()
 135       : initialization_started_(false), is_shutdown_(false) {}
 136
 137   ~BrowserMainRunnerImpl() override {
 138     if (initialization_started_ && !is_shutdown_)
 139       Shutdown();
 140   }
 141
 142   int Initialize(const MainFunctionParams& parameters) override {
 143     TRACE_EVENT0("startup", "BrowserMainRunnerImpl::Initialize");
 144     // On Android we normally initialize the browser in a series of UI thread
 145     // tasks. While this is happening a second request can come from the OS or
 146     // another application to start the browser. If this happens then we must
 147     // not run these parts of initialization twice.
 148     if (!initialization_started_) {
 149       initialization_started_ = true;
 150
 151 #if !defined(OS_IOS)
 152       if (parameters.command_line.HasSwitch(switches::kWaitForDebugger))
 153         base::debug::WaitForDebugger(60, true);
 154 #endif
 155
 156 #if defined(OS_WIN)
 157       if (base::win::GetVersion() < base::win::VERSION_VISTA) {
 158         // When "Extend support of advanced text services to all programs"
 159         // (a.k.a. Cicero Unaware Application Support; CUAS) is enabled on
 160         // Windows XP and handwriting modules shipped with Office 2003 are
 161         // installed, "penjpn.dll" and "skchui.dll" will be loaded and then
 162         // crash unless a user installs Office 2003 SP3. To prevent these
 163         // modules from being loaded, disable TSF entirely. crbug.com/160914.
 164         // TODO(yukawa): Add a high-level wrapper for this instead of calling
 165         // Win32 API here directly.
 166         ImmDisableTextFrameService(static_cast<DWORD>(-1));
 167       }
 168       InstallSha256LegacyHooks();
 169 #endif  // OS_WIN
 170
 171       base::StatisticsRecorder::Initialize();
 172
 173       notification_service_.reset(new NotificationServiceImpl);
 174
 175 #if defined(OS_WIN)
 176       // Ole must be initialized before starting message pump, so that TSF
 177       // (Text Services Framework) module can interact with the message pump
 178       // on Windows 8 Metro mode.
 179       ole_initializer_.reset(new ui::ScopedOleInitializer);
 180       // Enable DirectWrite font rendering if needed.
 181       MaybeEnableDirectWriteFontRendering();
 182 #endif  // OS_WIN
 183
 184       main_loop_.reset(new BrowserMainLoop(parameters));
 185
 186       main_loop_->Init();
 187
 188       main_loop_->EarlyInitialization();
 189
 190       // Must happen before we try to use a message loop or display any UI.
 191       if (!main_loop_->InitializeToolkit())
 192         return 1;
 193
 194       main_loop_->MainMessageLoopStart();
 195
 196 // WARNING: If we get a WM_ENDSESSION, objects created on the stack here
 197 // are NOT deleted. If you need something to run during WM_ENDSESSION add it
 198 // to browser_shutdown::Shutdown or BrowserProcess::EndSession.
 199
 200 #if defined(OS_WIN) && !defined(NO_TCMALLOC)
 201       // When linking shared libraries, NO_TCMALLOC is defined, and dynamic
 202       // allocator selection is not supported.
 203
 204       // Make this call before going multithreaded, or spawning any
 205       // subprocesses.
 206       base::allocator::SetupSubprocessAllocator();
 207 #endif
 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     scoped_ptr<BrowserShutdownProfileDumper> startup_profiler;
 241     if (main_loop_->is_tracing_startup()) {
 242       main_loop_->StopStartupTracingTimer();
 243       if (main_loop_->startup_trace_file() !=
 244           base::FilePath().AppendASCII("none")) {
 245         startup_profiler.reset(
 246             new BrowserShutdownProfileDumper(main_loop_->startup_trace_file()));
 247       }
 248     }
 249
 250     // The shutdown tracing got enabled in AttemptUserExit earlier, but someone
 251     // needs to write the result to disc. For that a dumper needs to get created
 252     // which will dump the traces to disc when it gets destroyed.
 253     const base::CommandLine& command_line =
 254         *base::CommandLine::ForCurrentProcess();
 255     scoped_ptr<BrowserShutdownProfileDumper> shutdown_profiler;
 256     if (command_line.HasSwitch(switches::kTraceShutdown)) {
 257       shutdown_profiler.reset(new BrowserShutdownProfileDumper(
 258           BrowserShutdownProfileDumper::GetShutdownProfileFileName()));
 259     }
 260
 261     {
 262       // The trace event has to stay between profiler creation and destruction.
 263       TRACE_EVENT0("shutdown", "BrowserMainRunner");
 264       g_exited_main_message_loop = true;
 265
 266       main_loop_->ShutdownThreadsAndCleanUp();
 267
 268       ui::ShutdownInputMethod();
 269   #if defined(OS_WIN)
 270       ole_initializer_.reset(NULL);
 271   #endif
 272   #if defined(OS_ANDROID)
 273       // Forcefully terminates the RunLoop inside MessagePumpForUI, ensuring
 274       // proper shutdown for content_browsertests. Shutdown() is not used by
 275       // the actual browser.
 276       base::MessageLoop::current()->QuitNow();
 277   #endif
 278       main_loop_.reset(NULL);
 279
 280       notification_service_.reset(NULL);
 281
 282       is_shutdown_ = true;
 283     }
 284   }
 285
 286  protected:
 287   // True if we have started to initialize the runner.
 288   bool initialization_started_;
 289
 290   // True if the runner has been shut down.
 291   bool is_shutdown_;
 292
 293   scoped_ptr<NotificationServiceImpl> notification_service_;
 294   scoped_ptr<BrowserMainLoop> main_loop_;
 295 #if defined(OS_WIN)
 296   scoped_ptr<ui::ScopedOleInitializer> ole_initializer_;
 297 #endif
 298
 299   DISALLOW_COPY_AND_ASSIGN(BrowserMainRunnerImpl);
 300 };
 301
 302 // static
 303 BrowserMainRunner* BrowserMainRunner::Create() {
 304   return new BrowserMainRunnerImpl();
 305 }
 306
 307 }  // namespace content