public static SsData ReadArgumentBlock(MemoryRegion data)
{
KphSsArgumentBlock argBlock = data.ReadStruct <KphSsArgumentBlock>(0, KphSsArgumentBlock.SizeOf, 0);
MemoryRegion dataRegion;
SsData ssArg = null;
dataRegion = new MemoryRegion(data, KphSsArgumentBlock.DataOffset);
// Process the argument block based on its type.
switch (argBlock.Type)
{
case KphSsArgumentType.Int8:
{
SsSimple simpleArg = new SsSimple
{
Argument = argBlock.Data.Int8,
Type = typeof(Byte)
};
ssArg = simpleArg;
}
break;
case KphSsArgumentType.Int16:
{
SsSimple simpleArg = new SsSimple
{
Argument = argBlock.Data.Int16,
Type = typeof(Int16)
};
ssArg = simpleArg;
}
break;
case KphSsArgumentType.Int32:
{
SsSimple simpleArg = new SsSimple
{
Argument = argBlock.Data.Int32,
Type = typeof(Int32)
};
ssArg = simpleArg;
}
break;
case KphSsArgumentType.Int64:
{
SsSimple simpleArg = new SsSimple
{
Argument = argBlock.Data.Int64,
Type = typeof(Int64)
};
ssArg = simpleArg;
}
break;
case KphSsArgumentType.Handle:
{
ssArg = new SsHandle(dataRegion);
}
break;
case KphSsArgumentType.UnicodeString:
{
ssArg = new SsUnicodeString(dataRegion);
}
break;
case KphSsArgumentType.ObjectAttributes:
{
ssArg = new SsObjectAttributes(dataRegion);
}
break;
case KphSsArgumentType.ClientId:
{
ssArg = new SsClientId(dataRegion);
}
break;
case KphSsArgumentType.Bytes:
{
ssArg = new SsBytes(dataRegion);
}
break;
}
ssArg.Index = argBlock.Index;
return(ssArg);
}
private void BufferWorkerThreadStart()
{
int cursor = 0;
// Open a handle to the current thread so other functions
// can alert us.
_bufferWorkerThreadHandle = ThreadHandle.OpenCurrent(ThreadAccess.All);
// We're ready.
_bufferWorkerThreadReadyEvent.Set();
while (!_terminating)
{
NtStatus status;
KphSsBlockHeader blockHeader;
// Wait for a block to read (enable alerting so we can
// be interrupted if someone wants us to stop).
status = _readSemaphore.Wait(true);
// Did we get alerted?
if (status == NtStatus.Alerted)
{
return;
}
// Check if we have an implicit cursor reset.
if (_buffer.Size - cursor < Marshal.SizeOf(typeof(KphSsBlockHeader)))
{
cursor = 0;
}
// Read the block header.
blockHeader = _buffer.ReadStruct <KphSsBlockHeader>(cursor, 0);
// Check if we have an explicit cursor reset.
if (blockHeader.Type == KphSsBlockType.Reset)
{
cursor = 0;
blockHeader = _buffer.ReadStruct <KphSsBlockHeader>(cursor, 0);
}
// Process the block.
if (blockHeader.Type == KphSsBlockType.Event)
{
var eventBlock = _buffer.ReadStruct <KphSsEventBlock>(cursor, 0);
int[] arguments;
IntPtr[] stackTrace;
// Reconstruct the argument and stack trace arrays.
arguments = new int[eventBlock.NumberOfArguments];
stackTrace = new IntPtr[eventBlock.TraceCount];
for (int i = 0; i < arguments.Length; i++)
{
arguments[i] = _buffer.ReadInt32(cursor + eventBlock.ArgumentsOffset, i);
}
for (int i = 0; i < stackTrace.Length; i++)
{
stackTrace[i] = _buffer.ReadIntPtr(cursor + eventBlock.TraceOffset, i);
}
// Create an event object.
SsEvent ssEvent = new SsEvent();
// Basic information
ssEvent.Time = DateTime.FromFileTime(eventBlock.Time);
ssEvent.ThreadId = eventBlock.ClientId.ThreadId;
ssEvent.ProcessId = eventBlock.ClientId.ProcessId;
ssEvent.Arguments = arguments;
ssEvent.StackTrace = stackTrace;
// Flags
ssEvent.ArgumentsCopyFailed =
(eventBlock.Flags & KphSsEventFlags.CopyArgumentsFailed) == KphSsEventFlags.CopyArgumentsFailed;
ssEvent.ArgumentsProbeFailed =
(eventBlock.Flags & KphSsEventFlags.ProbeArgumentsFailed) == KphSsEventFlags.ProbeArgumentsFailed;
ssEvent.CallNumber = eventBlock.Number;
if ((eventBlock.Flags & KphSsEventFlags.UserMode) == KphSsEventFlags.UserMode)
{
ssEvent.Mode = KProcessorMode.UserMode;
}
else
{
ssEvent.Mode = KProcessorMode.KernelMode;
}
// Raise the event.
if (this.EventBlockReceived != null)
{
this.EventBlockReceived(ssEvent);
}
}
else if (blockHeader.Type == KphSsBlockType.Argument)
{
var argBlock = _buffer.ReadStruct <KphSsArgumentBlock>(cursor, 0);
MemoryRegion dataRegion;
SsData ssArg = null;
dataRegion = new MemoryRegion(_buffer, cursor + KphSsArgumentBlock.DataOffset);
// Process the argument block based on its type.
switch (argBlock.Type)
{
case KphSsArgumentType.Int8:
{
SsSimple simpleArg = new SsSimple();
simpleArg.Argument = argBlock.Data.Int8;
simpleArg.Type = typeof(Byte);
ssArg = simpleArg;
}
break;
case KphSsArgumentType.Int16:
{
SsSimple simpleArg = new SsSimple();
simpleArg.Argument = argBlock.Data.Int16;
simpleArg.Type = typeof(Int16);
ssArg = simpleArg;
}
break;
case KphSsArgumentType.Int32:
{
SsSimple simpleArg = new SsSimple();
simpleArg.Argument = argBlock.Data.Int32;
simpleArg.Type = typeof(Int32);
ssArg = simpleArg;
}
break;
case KphSsArgumentType.Int64:
{
SsSimple simpleArg = new SsSimple();
simpleArg.Argument = argBlock.Data.Int64;
simpleArg.Type = typeof(Int64);
ssArg = simpleArg;
}
break;
case KphSsArgumentType.Handle:
{
ssArg = new SsHandle(dataRegion);
}
break;
case KphSsArgumentType.UnicodeString:
{
ssArg = new SsUnicodeString(dataRegion);
}
break;
case KphSsArgumentType.ObjectAttributes:
{
ssArg = new SsObjectAttributes(dataRegion);
}
break;
case KphSsArgumentType.ClientId:
{
ssArg = new SsClientId(dataRegion);
}
break;
}
ssArg.Index = argBlock.Index;
// Raise the event.
if (ssArg != null)
{
if (this.ArgumentBlockReceived != null)
{
this.ArgumentBlockReceived(ssArg);
}
}
}
// Advance the cursor.
cursor += blockHeader.Size;
// Signal that a buffer block is available for writing.
_writeSemaphore.Release();
}
}