C++ (Cpp) ProcessedStack::Clear Examples

Example #1

File: HangMonitor.cpp Project: Antonius32/Pale-Moon

void
ThreadMain(void*)
{
  PR_SetCurrentThreadName("Hang Monitor");

  MonitorAutoLock lock(*gMonitor);

  // In order to avoid issues with the hang monitor incorrectly triggering
  // during a general system stop such as sleeping, the monitor thread must
  // run twice to trigger hang protection.
  PRIntervalTime lastTimestamp = 0;
  int waitCount = 0;

#ifdef REPORT_CHROME_HANGS
  Telemetry::ProcessedStack stack;
  int32_t systemUptime = -1;
  int32_t firefoxUptime = -1;
  auto annotations = MakeUnique<ChromeHangAnnotations>();
#endif

  while (true) {
    if (gShutdown) {
      return; // Exit the thread
    }

    // avoid rereading the volatile value in this loop
    PRIntervalTime timestamp = gTimestamp;

    PRIntervalTime now = PR_IntervalNow();

    if (timestamp != PR_INTERVAL_NO_WAIT &&
        now < timestamp) {
      // 32-bit overflow, reset for another waiting period
      timestamp = 1; // lowest legal PRInterval value
    }

    if (timestamp != PR_INTERVAL_NO_WAIT &&
        timestamp == lastTimestamp &&
        gTimeout > 0) {
      ++waitCount;
#ifdef REPORT_CHROME_HANGS
      // Capture the chrome-hang stack + Firefox & system uptimes after
      // the minimum hang duration has been reached (not when the hang ends)
      if (waitCount == 2) {
        GetChromeHangReport(stack, systemUptime, firefoxUptime);
        ChromeHangAnnotatorCallout(*annotations);
      }
#else
      // This is the crash-on-hang feature.
      // See bug 867313 for the quirk in the waitCount comparison
      if (waitCount >= 2) {
        int32_t delay =
          int32_t(PR_IntervalToSeconds(now - timestamp));
        if (delay >= gTimeout) {
          MonitorAutoUnlock unlock(*gMonitor);
          Crash();
        }
      }
#endif
    } else {
#ifdef REPORT_CHROME_HANGS
      if (waitCount >= 2) {
        uint32_t hangDuration = PR_IntervalToSeconds(now - lastTimestamp);
        Telemetry::RecordChromeHang(hangDuration, stack, systemUptime,
                                    firefoxUptime, Move(annotations));
        stack.Clear();
        annotations = MakeUnique<ChromeHangAnnotations>();
      }
#endif
      lastTimestamp = timestamp;
      waitCount = 0;
    }

    PRIntervalTime timeout;
    if (gTimeout <= 0) {
      timeout = PR_INTERVAL_NO_TIMEOUT;
    } else {
      timeout = PR_MillisecondsToInterval(gTimeout * 500);
    }
    lock.Wait(timeout);
  }
}

Example #2

File: HangMonitor.cpp Project: Tripleman/mozilla-central

void
ThreadMain(void*)
{
  PR_SetCurrentThreadName("Hang Monitor");

  MonitorAutoLock lock(*gMonitor);

  // In order to avoid issues with the hang monitor incorrectly triggering
  // during a general system stop such as sleeping, the monitor thread must
  // run twice to trigger hang protection.
  PRIntervalTime lastTimestamp = 0;
  int waitCount = 0;

#ifdef REPORT_CHROME_HANGS
  Telemetry::ProcessedStack stack;
#endif

  while (true) {
    if (gShutdown) {
      return; // Exit the thread
    }

    // avoid rereading the volatile value in this loop
    PRIntervalTime timestamp = gTimestamp;

    PRIntervalTime now = PR_IntervalNow();

    if (timestamp != PR_INTERVAL_NO_WAIT &&
        now < timestamp) {
      // 32-bit overflow, reset for another waiting period
      timestamp = 1; // lowest legal PRInterval value
    }

    if (timestamp != PR_INTERVAL_NO_WAIT &&
        timestamp == lastTimestamp &&
        gTimeout > 0) {
      ++waitCount;
      if (waitCount == 2) {
#ifdef REPORT_CHROME_HANGS
        GetChromeHangReport(stack);
#else
        int32_t delay =
          int32_t(PR_IntervalToSeconds(now - timestamp));
        if (delay > gTimeout) {
          MonitorAutoUnlock unlock(*gMonitor);
          Crash();
        }
#endif
      }
    }
    else {
#ifdef REPORT_CHROME_HANGS
      if (waitCount >= 2) {
        uint32_t hangDuration = PR_IntervalToSeconds(now - lastTimestamp);
        Telemetry::RecordChromeHang(hangDuration, stack);
        stack.Clear();
      }
#endif
      lastTimestamp = timestamp;
      waitCount = 0;
    }

    PRIntervalTime timeout;
    if (gTimeout <= 0) {
      timeout = PR_INTERVAL_NO_TIMEOUT;
    }
    else {
      timeout = PR_MillisecondsToInterval(gTimeout * 500);
    }
    lock.Wait(timeout);
  }
}