private static void clearLTTngTraceHandle(ref LTTngTraceHandle handle)
{
handle.id = -1;
handle.ctx = IntPtr.Zero;
handle.ctf_iter = IntPtr.Zero;
handle.last_iter_pos = IntPtr.Zero;
}
public static extern LttngReaderStatusCode set_start_end_time(ref LTTngTraceHandle handle, ulong start_time_epoch, ulong end_time_epoch);
public static extern LttngReaderStatusCode read_next_event(ref LTTngTraceHandle trace_handle, ref EventRecord evDesc, StringBuilder unstructured_event_text, [MarshalAs(UnmanagedType.LPStr)] StringBuilder taskname_eventname, ref ulong timestamp_unix_epoch_nano_s, ref bool is_unstructured);
public static extern LttngReaderStatusCode finalize_trace_processing(ref LTTngTraceHandle trace_handle);
public static extern LttngReaderStatusCode initialize_trace_processing(StringBuilder trace_file_folder_path, ulong start_time_epoch_ns, ulong end_time_epoch_ns, out LTTngTraceHandle trace_handle);
private LttngReaderStatusCode ProcessTrace(DateTime startTime, DateTime endTime, ref LTTngTraceHandle traceHandle, out ulong eventReadFailureCount)
{
EventRecord eventRecord = new EventRecord();
ulong lastReadTimestamp = 0;
// needed for processing unstructured events in Linux
bool isUnstructured = false;
StringBuilder unstructuredRecord = new StringBuilder(LttngReaderBindings.MAX_LTTNG_UNSTRUCTURED_EVENT_LEN + 1);
StringBuilder taskNameEventName = new StringBuilder(LttngReaderBindings.MAX_LTTNG_TASK_EVENT_NAME_LEN + 1);
ulong startTimeEpochNanoS = LttngTraceFolderEventReader.ConvertToUnixEpoch(startTime);
ulong endTimeEpochNanoS = LttngTraceFolderEventReader.ConvertToUnixEpoch(endTime);
// set start and end time for reading traces
LttngReaderStatusCode res = LttngReaderBindings.set_start_end_time(ref traceHandle, startTimeEpochNanoS, endTimeEpochNanoS);
eventReadFailureCount = 0;
if (res != LttngReaderStatusCode.SUCCESS)
{
return(res);
}
res = LttngReaderBindings.read_next_event(ref traceHandle, ref eventRecord, unstructuredRecord, taskNameEventName, ref lastReadTimestamp, ref isUnstructured);
while (res == LttngReaderStatusCode.SUCCESS || res == LttngReaderStatusCode.FAILED_TO_READ_EVENT)
{
if (res == LttngReaderStatusCode.FAILED_TO_READ_EVENT)
{
eventReadFailureCount++;
continue;
}
EventRecordEventArgs eventRecordEventArgs;
this.lastEventReadTimestamp = lastReadTimestamp;
if (isUnstructured)
{
try
{
eventRecord.EventHeader.TimeStamp = LttngTraceFolderEventReader.ConvertFromUnixEpoch(lastReadTimestamp).ToFileTimeUtc();
}
catch (Exception)
{
// Flagging error with minimum timestamp so we can continue processing other events.
eventRecord.EventHeader.TimeStamp = 0;
}
eventRecordEventArgs = new EventRecordEventArgs(eventRecord);
eventRecordEventArgs.IsUnstructured = isUnstructured;
eventRecordEventArgs.TaskNameEventName = taskNameEventName.ToString();
eventRecordEventArgs.UnstructuredRecord = unstructuredRecord.ToString();
}
else
{
eventRecordEventArgs = new EventRecordEventArgs(eventRecord);
}
this.EventRead(this, eventRecordEventArgs);
if (eventRecordEventArgs.Cancel)
{
return(LttngReaderStatusCode.SUCCESS);
}
res = LttngReaderBindings.read_next_event(ref traceHandle, ref eventRecord, unstructuredRecord, taskNameEventName, ref lastReadTimestamp, ref isUnstructured);
}
return(res);
}
