private void Initialize(EventRecord eventRecord)
{
int size = 0;
const uint BufferTooSmall = 122;
const uint ElementNotFound = 1168;
this._traceEventInfo = new TraceEventInfo();
int error = NativeMethods.TdhGetEventInformation(ref eventRecord, 0, IntPtr.Zero, IntPtr.Zero, ref size);
if (error == ElementNotFound)
{
// Nothing else to do here.
this._hasProperties = false;
return;
}
this._hasProperties = true;
if (error != BufferTooSmall)
{
throw new System.ComponentModel.Win32Exception(error);
}
// Get the event information (schema)
this._address = Marshal.AllocHGlobal(size);
error = NativeMethods.TdhGetEventInformation(ref eventRecord, 0, IntPtr.Zero, _address, ref size);
if (error != 0)
{
throw new System.ComponentModel.Win32Exception(error);
}
// Marshal the first part of the trace event information.
Marshal.PtrToStructure(this._address, _traceEventInfo);
// Marshal the second part of the trace event information, the array of property info.
int actualSize = Marshal.SizeOf(this._traceEventInfo);
if (size != actualSize)
{
int structSize = Marshal.SizeOf(typeof(EventPropertyInfo));
int itemsLeft = (size - actualSize) / structSize;
this._eventPropertyInfoArray = new EventPropertyInfo[itemsLeft];
long baseAddress = _address.ToInt64() + actualSize;
for (int i = 0; i < itemsLeft; i++)
{
IntPtr structPtr = new IntPtr(baseAddress + (i * structSize));
EventPropertyInfo info = new EventPropertyInfo();
Marshal.PtrToStructure(structPtr, info);
this._eventPropertyInfoArray[i] = info;
}
}
// Get the opcode name
if (_traceEventInfo.OpcodeNameOffset > 0)
{
this.EventName = Marshal.PtrToStringUni(new IntPtr(_address.ToInt64() + _traceEventInfo.OpcodeNameOffset));
}
}
internal IList <PropertyItem> GetProperties(EventRecord eventRecord)
{
// We only support top level properties and simple types
IList <PropertyItem> properties = new List <PropertyItem>();
if (this._hasProperties)
{
int offset = 0;
for (int i = 0; i < _traceEventInfo.TopLevelPropertyCount; i++)
{
EventPropertyInfo info = _eventPropertyInfoArray[i];
// Read the current property name
string propertyName = Marshal.PtrToStringUni(new IntPtr(_address.ToInt64() + info.NameOffset));
object value;
string mapName;
int length;
if (eventRecord.UserData == IntPtr.Zero)
{
mapName = string.Empty;
value = string.Empty;
length = info.LengthPropertyIndex;
}
else
{
IntPtr dataPtr = new IntPtr(eventRecord.UserData.ToInt64() + offset);
value = ReadPropertyValue(info, dataPtr, out mapName, out length);
}
// If we have a map name, return both map name and map value as a pair.
if (!string.IsNullOrEmpty(mapName))
{
value = new KeyValuePair <string, object>(mapName, value);
}
offset += length;
properties.Add(new PropertyItem(propertyName, value));
}
if (offset < eventRecord.UserDataLength)
{
//
// There is some extra information not mapped.
//
IntPtr dataPtr = new IntPtr(eventRecord.UserData.ToInt64() + offset);
int length = eventRecord.UserDataLength - offset;
byte[] array = new byte[length];
for (int index = 0; index < length; index++)
{
array[index] = Marshal.ReadByte(dataPtr, index);
}
properties.Add(new PropertyItem("__ExtraPayload", array));
}
}
else
{
// NOTE: It is just a guess that this is an Unicode string
string str = Marshal.PtrToStringUni(eventRecord.UserData);
properties.Add(new PropertyItem("EventData", str));
}
return(properties);
}
private object ReadPropertyValue(EventPropertyInfo info, IntPtr dataPtr, out string mapName, out int length)
{
length = info.LengthPropertyIndex;
if (info.NonStructTypeValue.MapNameOffset != 0)
{
mapName = Marshal.PtrToStringUni(new IntPtr(this._address.ToInt64() + info.NonStructTypeValue.MapNameOffset));
}
else
{
mapName = string.Empty;
}
switch (info.NonStructTypeValue.InType)
{
case TdhInType.Null:
break;
case TdhInType.UnicodeString:
{
string str = Marshal.PtrToStringUni(dataPtr);
length = (str.Length + 1) * sizeof(char);
return(str);
}
case TdhInType.AnsiString:
{
string str = Marshal.PtrToStringAnsi(dataPtr);
length = (str.Length + 1);
return(str);
}
case TdhInType.Int8:
return((sbyte)Marshal.ReadByte(dataPtr));
case TdhInType.UInt8:
return(Marshal.ReadByte(dataPtr));
case TdhInType.Int16:
return(Marshal.ReadInt16(dataPtr));
case TdhInType.UInt16:
return((uint)Marshal.ReadInt16(dataPtr));
case TdhInType.Int32:
return(Marshal.ReadInt32(dataPtr));
case TdhInType.UInt32:
return((uint)Marshal.ReadInt32(dataPtr));
case TdhInType.Int64:
return(Marshal.ReadInt64(dataPtr));
case TdhInType.UInt64:
return((ulong)Marshal.ReadInt64(dataPtr));
case TdhInType.Float:
return(BitConverter.ToSingle(BitConverter.GetBytes(Marshal.ReadInt32(dataPtr)), 0));
case TdhInType.Double:
return(BitConverter.ToDouble(BitConverter.GetBytes(Marshal.ReadInt64(dataPtr)), 0));
case TdhInType.Boolean:
return((bool)(Marshal.ReadInt32(dataPtr) != 0));
case TdhInType.Binary:
break;
case TdhInType.Guid:
return(new Guid(
Marshal.ReadInt32(dataPtr),
Marshal.ReadInt16(dataPtr, 4),
Marshal.ReadInt16(dataPtr, 6),
Marshal.ReadByte(dataPtr, 8),
Marshal.ReadByte(dataPtr, 9),
Marshal.ReadByte(dataPtr, 10),
Marshal.ReadByte(dataPtr, 11),
Marshal.ReadByte(dataPtr, 12),
Marshal.ReadByte(dataPtr, 13),
Marshal.ReadByte(dataPtr, 14),
Marshal.ReadByte(dataPtr, 15)
));
case TdhInType.Pointer:
return(Marshal.ReadIntPtr(dataPtr));
case TdhInType.FileTime:
return(Marshal.ReadInt64(dataPtr));
case TdhInType.SystemTime:
{
SYSTEMTIME st = new SYSTEMTIME();
Marshal.PtrToStructure(dataPtr, st);
return(st);
}
case TdhInType.SID:
//TODO: use ConvertSidToStringSid
return("SID");
case TdhInType.HexInt32:
break;
case TdhInType.HexInt64:
break;
case TdhInType.CountedString:
break;
case TdhInType.CountedAnsiString:
break;
case TdhInType.ReversedCountedString:
break;
case TdhInType.ReversedCountedAnsiString:
break;
case TdhInType.NonNullTerminatedString:
break;
case TdhInType.NonNullTerminatedAnsiString:
break;
case TdhInType.UnicodeChar:
break;
case TdhInType.AnsiChar:
break;
case TdhInType.SizeT:
break;
case TdhInType.HexDump:
break;
case TdhInType.WbemSID:
break;
default:
break;
}
Debugger.Break();
return(null);
}
