public EventPipeEventSourceV1(Deserializer deserializer, string fileName, int version)
: base(deserializer)
{
// V1 EventPipe doesn't have process info.
// Since it's from a single process, use the file name as the process name.
_processName = Path.GetFileNameWithoutExtension(fileName);
_processId = 0;
_version = version;
// V1 EventPipe doesn't have osVersion, cpuSpeedMHz, pointerSize, numberOfProcessors
osVersion = new Version("0.0.0.0");
cpuSpeedMHz = 10;
pointerSize = 8; // V1 EventPipe only supports Linux which is x64 only.
numberOfProcessors = 1;
// We need to read the header to get the sync time information here
ReadEventPipeTimeInfo();
var mem = (TraceEventNativeMethods.EVENT_RECORD *)Marshal.AllocHGlobal(sizeof(TraceEventNativeMethods.EVENT_RECORD));
*mem = default(TraceEventNativeMethods.EVENT_RECORD);
_header = mem;
_eventParser = new EventPipeTraceEventParser(this);
}
/// <summary>
/// Given the EventPIpe metaData header and a stream pointing at the serialized meta-data for the parameters for the
/// event, create a new DynamicTraceEventData that knows how to parse that event.
/// ReaderForParameters.Current is advanced past the parameter information.
/// </summary>
private DynamicTraceEventData ReadEventParametersAndBuildTemplate(EventPipeEventMetaDataHeader eventMetaDataHeader, PinnedStreamReader readerForParameters)
{
int opcode;
string opcodeName;
EventPipeTraceEventParser.GetOpcodeFromEventName(eventMetaDataHeader.EventName, out opcode, out opcodeName);
DynamicTraceEventData.PayloadFetchClassInfo classInfo = null;
DynamicTraceEventData template = new DynamicTraceEventData(null, eventMetaDataHeader.EventId, 0, eventMetaDataHeader.EventName, Guid.Empty, opcode, opcodeName, eventMetaDataHeader.ProviderId, eventMetaDataHeader.ProviderName);
// If the metadata contains no parameter metadata, don't attempt to read it.
if (!eventMetaDataHeader.ContainsParameterMetadata)
{
template.payloadNames = new string[0];
template.payloadFetches = new DynamicTraceEventData.PayloadFetch[0];
return(template);
}
// Read the count of event payload fields.
int fieldCount = readerForParameters.ReadInt32();
Debug.Assert(0 <= fieldCount && fieldCount < 0x4000);
if (fieldCount > 0)
{
// Recursively parse the metadata, building up a list of payload names and payload field fetch objects.
classInfo = ParseFields(readerForParameters, fieldCount);
}
else
{
classInfo = new DynamicTraceEventData.PayloadFetchClassInfo()
{
FieldNames = new string[0],
FieldFetches = new DynamicTraceEventData.PayloadFetch[0]
};
}
template.payloadNames = classInfo.FieldNames;
template.payloadFetches = classInfo.FieldFetches;
return(template);
}