Ejemplo n.º 1
0
static void
InitializeHooks()
{
  static bool initialized = false;
  if (initialized) {
    return;
  }
  initialized = true;
  sDeviceNames = new std::unordered_map<std::wstring, std::wstring>();
  for (const std::wstring& name : GetDosDeviceNames()) {
    sDeviceNames->emplace(name, GetDeviceMapping(name));
  }

  sKernel32Intercept.Init("kernelbase.dll");
  sOriginalQueryDosDeviceWFnPtr.Set(sKernel32Intercept, "QueryDosDeviceW",
                                    &QueryDosDeviceWHook);
}
Ejemplo n.º 2
0
void Compatibility::Init() {
  // Note we collect some AT statistics/telemetry here for convenience.
  InitConsumers();

  CrashReporter::AnnotateCrashReport(
      CrashReporter::Annotation::AccessibilityInProcClient,
      nsPrintfCString("0x%X", sConsumers));

  // Gather telemetry
  uint32_t temp = sConsumers;
  for (int i = 0; temp; i++) {
    if (temp & 0x1) statistics::A11yConsumers(i);

    temp >>= 1;
  }

  // Turn off new tab switching for Jaws and WE.
  if (sConsumers & (JAWS | OLDJAWS | WE)) {
    // Check to see if the pref for disallowing CtrlTab is already set. If so,
    // bail out (respect the user settings). If not, set it.
    if (!Preferences::HasUserValue("browser.ctrlTab.disallowForScreenReaders"))
      Preferences::SetBool("browser.ctrlTab.disallowForScreenReaders", true);
  }

  // If we have a consumer who is not NVDA, we enable detection for the
  // InSendMessageEx compatibility hack. NVDA does not require this.
  // We also skip UIA, as we see crashes there.
  if ((sConsumers & (~(UIAUTOMATION | NVDA))) && BrowserTabsRemoteAutostart()) {
    sUser32Interceptor.Init("user32.dll");
    sInSendMessageExStub.Set(sUser32Interceptor, "InSendMessageEx",
                             &InSendMessageExHook);

    // The vectored exception handler allows us to catch exceptions ahead of any
    // SEH handlers.
    if (!sVectoredExceptionHandler) {
      // We need to let ASan's ShadowExceptionHandler remain in the firstHandler
      // position, otherwise we'll get infinite recursion when our handler
      // faults on shadow memory.
      const ULONG firstHandler = FALSE;
      sVectoredExceptionHandler = AddVectoredExceptionHandler(
          firstHandler, &DetectInSendMessageExCompat);
    }
  }
}