Python os.WCOREDUMP Examples

def processEnded(self, reason=None):
        """
        When we are told the process ended, try to notify the other side about
        how the process ended using the exit-signal or exit-status requests.
        Also, close the channel.
        """
        if reason is not None:
            err = reason.value
            if err.signal is not None:
                signame = self._getSignalName(err.signal)
                if (getattr(os, 'WCOREDUMP', None) is not None and
                    os.WCOREDUMP(err.status)):
                    log.msg('exitSignal: %s (core dumped)' % (signame,))
                    coreDumped = 1
                else:
                    log.msg('exitSignal: %s' % (signame,))
                    coreDumped = 0
                self.session.conn.sendRequest(self.session, b'exit-signal',
                        common.NS(networkString(signame[3:])) +
                        chr(coreDumped) + common.NS(b'') + common.NS(b''))
            elif err.exitCode is not None:
                log.msg('exitCode: %r' % (err.exitCode,))
                self.session.conn.sendRequest(self.session, b'exit-status',
                        struct.pack('>L', err.exitCode))
        self.session.loseConnection() 

def processEnded(self, reason=None):
        """
        When we are told the process ended, try to notify the other side about
        how the process ended using the exit-signal or exit-status requests.
        Also, close the channel.
        """
        if reason is not None:
            err = reason.value
            if err.signal is not None:
                signame = self._getSignalName(err.signal)
                if (getattr(os, 'WCOREDUMP', None) is not None and
                    os.WCOREDUMP(err.status)):
                    log.msg('exitSignal: %s (core dumped)' % (signame,))
                    coreDumped = 1
                else:
                    log.msg('exitSignal: %s' % (signame,))
                    coreDumped = 0
                self.session.conn.sendRequest(
                    self.session, b'exit-signal',
                    common.NS(networkString(signame[3:])) + chr(coreDumped) +
                    common.NS(b'') + common.NS(b''))
            elif err.exitCode is not None:
                log.msg('exitCode: %r' % (err.exitCode,))
                self.session.conn.sendRequest(self.session, b'exit-status',
                        struct.pack('>L', err.exitCode))
        self.session.loseConnection() 

def status_msg(status):
    """Given 'status', which is a process status in the form reported by
    waitpid(2) and returned by process_status(), returns a string describing
    how the process terminated."""
    if os.WIFEXITED(status):
        s = "exit status %d" % os.WEXITSTATUS(status)
    elif os.WIFSIGNALED(status):
        s = _signal_status_msg("killed", os.WTERMSIG(status))
    elif os.WIFSTOPPED(status):
        s = _signal_status_msg("stopped", os.WSTOPSIG(status))
    else:
        s = "terminated abnormally (%x)" % status
    if os.WCOREDUMP(status):
        s += ", core dumped"
    return s 

def processEnded(self, reason=None):
        """
        When we are told the process ended, try to notify the other side about
        how the process ended using the exit-signal or exit-status requests.
        Also, close the channel.
        """
        if reason is not None:
            err = reason.value
            if err.signal is not None:
                signame = self._getSignalName(err.signal)
                if (getattr(os, 'WCOREDUMP', None) is not None and
                    os.WCOREDUMP(err.status)):
                    log.msg('exitSignal: %s (core dumped)' % (signame,))
                    coreDumped = 1
                else:
                    log.msg('exitSignal: %s' % (signame,))
                    coreDumped = 0
                self.session.conn.sendRequest(self.session, 'exit-signal',
                        common.NS(signame[3:]) + chr(coreDumped) +
                        common.NS('') + common.NS(''))
            elif err.exitCode is not None:
                log.msg('exitCode: %r' % (err.exitCode,))
                self.session.conn.sendRequest(self.session, 'exit-status',
                        struct.pack('>L', err.exitCode))
        self.session.loseConnection()

    # transport stuff (we are also a transport!) 

def _monitor_daemon(daemon_pid):
    # XXX should log daemon's stderr output at startup time
    # XXX should use setproctitle module if available
    last_restart = None
    while True:
        retval, status = _waitpid(daemon_pid, 0)
        if retval < 0:
            sys.stderr.write("waitpid failed\n")
            sys.exit(1)
        elif retval == daemon_pid:
            status_msg = ("pid %d died, %s"
                          % (daemon_pid, ovs.process.status_msg(status)))

            if _should_restart(status):
                if os.WCOREDUMP(status):
                    # Disable further core dumps to save disk space.
                    try:
                        resource.setrlimit(resource.RLIMIT_CORE, (0, 0))
                    except resource.error:
                        vlog.warn("failed to disable core dumps")

                # Throttle restarts to no more than once every 10 seconds.
                if (last_restart is not None and
                    ovs.timeval.msec() < last_restart + 10000):
                    vlog.warn("%s, waiting until 10 seconds since last "
                              "restart" % status_msg)
                    while True:
                        now = ovs.timeval.msec()
                        wakeup = last_restart + 10000
                        if now > wakeup:
                            break
                        print "sleep %f" % ((wakeup - now) / 1000.0)
                        time.sleep((wakeup - now) / 1000.0)
                last_restart = ovs.timeval.msec()

                vlog.err("%s, restarting" % status_msg)
                daemon_pid = _fork_and_wait_for_startup()
                if not daemon_pid:
                    break
            else:
                vlog.info("%s, exiting" % status_msg)
                sys.exit(0)

   # Running in new daemon process. 

def run(self):
        """
        self.exit_status = os.waitpid(self.pid, os.WNOHANG | os.WUNTRACED)
        while self.exit_status == (0, 0):
            self.exit_status = os.waitpid(self.pid, os.WNOHANG | os.WUNTRACED)
        """
        self.spawn_target()

        self.finished_starting.set()
        if self.proc_name:
            gone, _ = psutil.wait_procs([self._psutil_proc])
            self.exit_status = gone[0].returncode
        else:
            exit_info = os.waitpid(self.pid, 0)
            self.exit_status = exit_info[1]  # [0] is the pid

        default_reason = "Process died for unknown reason"
        if self.exit_status is not None:
            if os.WCOREDUMP(self.exit_status):
                reason = "Segmentation fault"
            elif os.WIFSTOPPED(self.exit_status):
                reason = "Stopped with signal " + str(os.WTERMSIG(self.exit_status))
            elif os.WIFSIGNALED(self.exit_status):
                reason = "Terminated with signal " + str(os.WTERMSIG(self.exit_status))
            elif os.WIFEXITED(self.exit_status):
                reason = "Exit with code - " + str(os.WEXITSTATUS(self.exit_status))
            else:
                reason = default_reason
        else:
            reason = default_reason

        outdata = None
        errdata = None
        try:
            if self._process is not None:
                outdata, errdata = self._process.communicate(timeout=POPEN_COMMUNICATE_TIMEOUT_FOR_ALREADY_DEAD_TASK)
        except subprocess.TimeoutExpired:
            self.process_monitor.log(
                msg="Expired waiting for process {0} to terminate".format(self._process.pid), level=1
            )

        msg = "[{0}] Crash. Exit code: {1}. Reason - {2}\n".format(
            time.strftime("%I:%M.%S"), self.exit_status if self.exit_status is not None else "<unknown>", reason
        )
        if errdata is not None:
            msg += "STDERR:\n{0}\n".format(errdata.decode("ascii"))
        if outdata is not None:
            msg += "STDOUT:\n{0}\n".format(outdata.decode("ascii"))
        self.process_monitor.last_synopsis = msg