internal TraceEventNativeMethods.EVENT_RECORD *ReadEvent(PinnedStreamReader reader)
{
EventPipeEventHeader *eventData = (EventPipeEventHeader *)reader.GetPointer(EventPipeEventHeader.HeaderSize);
eventData = (EventPipeEventHeader *)reader.GetPointer(eventData->TotalEventSize); // now we now the real size and get read entire event
// Basic sanity checks. Are the timestamps and sizes sane.
Debug.Assert(sessionEndTimeQPC <= eventData->TimeStamp);
Debug.Assert(sessionEndTimeQPC == 0 || eventData->TimeStamp - sessionEndTimeQPC < _QPCFreq * 24 * 3600);
Debug.Assert(0 <= eventData->PayloadSize && eventData->PayloadSize <= eventData->TotalEventSize);
Debug.Assert(0 < eventData->TotalEventSize && eventData->TotalEventSize < 0x20000); // TODO really should be 64K but BulkSurvivingObjectRanges needs fixing.
Debug.Assert(_fileFormatVersionNumber < 3 ||
((int)EventPipeEventHeader.PayloadBytes(eventData) % 4 == 0 && eventData->TotalEventSize % 4 == 0)); // ensure 4 byte alignment
StreamLabel eventDataEnd = reader.Current.Add(eventData->TotalEventSize);
Debug.Assert(0 <= EventPipeEventHeader.StackBytesSize(eventData) && EventPipeEventHeader.StackBytesSize(eventData) <= eventData->TotalEventSize);
TraceEventNativeMethods.EVENT_RECORD *ret = null;
if (eventData->IsMetadata())
{
int totalEventSize = eventData->TotalEventSize;
int payloadSize = eventData->PayloadSize;
// Note that this skip invalidates the eventData pointer, so it is important to pull any fields out we need first.
reader.Skip(EventPipeEventHeader.HeaderSize);
StreamLabel metaDataEnd = reader.Current.Add(payloadSize);
// Read in the header (The header does not include payload parameter information)
var metaDataHeader = new EventPipeEventMetaDataHeader(reader, payloadSize, _fileFormatVersionNumber, PointerSize, _processId);
_eventMetadataDictionary.Add(metaDataHeader.MetaDataId, metaDataHeader);
// Tell the parser about this new event
_eventParser.OnNewEventPipeEventDefinition(metaDataHeader, reader);
Debug.Assert(reader.Current == metaDataEnd); // We should have read all the meta-data.
int stackBytes = reader.ReadInt32();
Debug.Assert(stackBytes == 0, "Meta-data events should always have a empty stack");
}
else
{
if (_eventMetadataDictionary.TryGetValue(eventData->MetaDataId, out var metaData))
{
ret = metaData.GetEventRecordForEventData(eventData);
}
else
{
Debug.Assert(false, "Warning can't find metaData for ID " + eventData->MetaDataId.ToString("x"));
}
}
reader.Goto(eventDataEnd);
return(ret);
}
internal TraceEventNativeMethods.EVENT_RECORD *ReadEvent(PinnedStreamReader reader)
{
EventPipeEventHeader *eventData = (EventPipeEventHeader *)reader.GetPointer(EventPipeEventHeader.HeaderSize);
eventData = (EventPipeEventHeader *)reader.GetPointer(eventData->TotalEventSize); // now we now the real size and get read entire event
// Basic sanity checks. Are the timestamps and sizes sane.
Debug.Assert(sessionEndTimeQPC <= eventData->TimeStamp);
Debug.Assert(sessionEndTimeQPC == 0 || eventData->TimeStamp - sessionEndTimeQPC < _QPCFreq * 24 * 3600);
Debug.Assert(0 <= eventData->PayloadSize && eventData->PayloadSize <= eventData->TotalEventSize);
Debug.Assert(0 < eventData->TotalEventSize && eventData->TotalEventSize < 0x20000); // TODO really should be 64K but BulkSurvivingObjectRanges needs fixing.
Debug.Assert(_fileFormatVersionNumber < 3 ||
((int)EventPipeEventHeader.PayloadBytes(eventData) % 4 == 0 && eventData->TotalEventSize % 4 == 0)); // ensure 4 byte alignment
StreamLabel eventDataEnd = reader.Current.Add(eventData->TotalEventSize);
Debug.Assert(0 <= EventPipeEventHeader.StackBytesSize(eventData) && EventPipeEventHeader.StackBytesSize(eventData) <= eventData->TotalEventSize);
TraceEventNativeMethods.EVENT_RECORD *ret = null;;
if (eventData->IsMetadata())
{
int totalEventSize = eventData->TotalEventSize;
int payloadSize = eventData->PayloadSize;
// Note that this skip invalidates the eventData pointer, so it is important to pull any fields out we need first.
reader.Skip(EventPipeEventHeader.HeaderSize);
var metaData = new EventPipeEventMetaData(reader, payloadSize, _fileFormatVersionNumber, PointerSize, _processId);
_eventMetadataDictionary.Add(metaData.MetaDataId, metaData);
_eventParser.AddTemplate(metaData); // if we don't add the templates to this parse, we are going to have unhadled events (see https://github.com/Microsoft/perfview/issues/461)
int stackBytes = reader.ReadInt32();
Debug.Assert(stackBytes == 0, "Meta-data events should always have a empty stack");
}
else
{
if (_eventMetadataDictionary.TryGetValue(eventData->MetaDataId, out var metaData))
{
ret = metaData.GetEventRecordForEventData(eventData);
}
else
{
Debug.Assert(false, "Warning can't find metaData for ID " + eventData->MetaDataId.ToString("x"));
}
}
reader.Goto(eventDataEnd);
return(ret);
}
public override bool Process()
{
PinnedStreamReader deserializerReader = (PinnedStreamReader)_deserializer.Reader;
deserializerReader.Goto(_startEventOfStream);
while (deserializerReader.Current < _endOfEventStream)
{
TraceEventNativeMethods.EVENT_RECORD *eventRecord = ReadEvent(deserializerReader);
if (eventRecord != null)
{
// in the code below we set sessionEndTimeQPC to be the timestamp of the last event.
// Thus the new timestamp should be later, and not more than 1 day later.
Debug.Assert(sessionEndTimeQPC <= eventRecord->EventHeader.TimeStamp);
Debug.Assert(sessionEndTimeQPC == 0 || eventRecord->EventHeader.TimeStamp - sessionEndTimeQPC < _QPCFreq * 24 * 3600);
TraceEvent event_ = Lookup(eventRecord);
Dispatch(event_);
sessionEndTimeQPC = eventRecord->EventHeader.TimeStamp;
}
}
return(true);
}
