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