/// <summary>
/// Starts the trace safe.
/// </summary>
/// <param name="logFileMode">The log file mode.</param>
/// <param name="logFileMaxSize">Size of the log file max.</param>
/// <param name="logFileName">Name of the log file.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
public bool StartTraceSafe(
NativeMethods.EventTraceFileMode logFileMode = NativeMethods.EventTraceFileMode.RealTime,
uint logFileMaxSize = 0, string logFileName = null)
{
if (QueryTrace(_sessionName))
{
StopTrace(_sessionName);
}
if (!StartTrace(logFileMode, logFileMaxSize, logFileName))
{
CleanTrace(_sessionName);
if (!StartTrace(logFileMode, logFileMaxSize, logFileName))
{
CDFMonitor.Instance.EtwTraceClean(true);
if (!StartTrace(logFileMode, logFileMaxSize, logFileName))
{
return(false);
}
}
}
return(Running = true);
}
/// <summary>
/// Start the ETW session.
/// </summary>
/// <param name="logFileMode">The log file mode.</param>
/// <param name="logFileMaxSize">Size of the log file max.</param>
/// <param name="logFileName">Name of the log file.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
public bool StartTrace(NativeMethods.EventTraceFileMode logFileMode = NativeMethods.EventTraceFileMode.RealTime,
uint logFileMaxSize = 0, string logFileName = null)
{
Debug.Assert(_handle == 0, "_handle == 0");
NativeMethods.EventTraceProperties properties = CommonEventTraceProperties();
properties.WNode.Flags = NativeMethods.WNodeFlags.TracedGuid;
properties.WNode.ClientContext = 1;
properties.LogFileMode = logFileMode;
properties.FlushTimer = 1;
if (logFileMode != NativeMethods.EventTraceFileMode.RealTime)
{
properties.MaximumFileSize = logFileMaxSize;
//32 bit different
uint offset = 4;
if (IntPtr.Size == 8) //64 bit
{
offset = 0;
}
properties.LogFileNameOffset = NativeMethods.EventTracePropertiesStructSize +
(NativeMethods.EventTracePropertiesStringSize) - offset;
properties.LogFileName = logFileName;
properties.FlushTimer = 0;
}
CDFMonitor.LogOutputHandler("DEBUG:ETWController.StartTrace:starting trace.");
uint processResult = NativeMethods.StartTrace(out _handle, _sessionName, ref properties);
int lastError = Marshal.GetLastWin32Error();
if (!NativeMethods.IsValidHandle(_handle))
{
CDFMonitor.LogOutputHandler("DEBUG:StartTrace: exception. lastError:" + lastError.ToString());
return(false);
}
if (processResult != NativeMethods.ERROR_SUCCESS &&
processResult != NativeMethods.ERROR_CANCELLED &&
processResult != NativeMethods.ERROR_ALREADY_EXISTS)
{
CDFMonitor.LogOutputHandler("StartTrace: exception. process result:" + processResult.ToString());
return(false);
}
return(true);
}
