private void ProcessStackWalk(uint osThreadId)
{
IXCLRDataProcess ixclrDataProcess = _context.Runtime.DacInterface;
object tmp;
HR.Verify(ixclrDataProcess.GetTaskByOSThreadID(osThreadId, out tmp));
IXCLRDataTask task = (IXCLRDataTask)tmp;
HR.Verify(task.CreateStackWalk(0xf /*all flags*/, out tmp));
IXCLRDataStackWalk stackWalk = (IXCLRDataStackWalk)tmp;
while (HR.S_OK == stackWalk.Next())
{
ProcessFrame(stackWalk);
}
}
internal IEnumerable <ClrStackFrame> EnumerateStackFrames(DesktopThread thread)
{
IXCLRDataProcess proc = GetClrDataProcess();
object tmp;
int res = proc.GetTaskByOSThreadID(thread.OSThreadId, out tmp);
if (res < 0)
{
yield break;
}
IXCLRDataTask task = null;
IXCLRDataStackWalk stackwalk = null;
try
{
task = (IXCLRDataTask)tmp;
res = task.CreateStackWalk(0xf, out tmp);
if (res < 0)
{
yield break;
}
stackwalk = (IXCLRDataStackWalk)tmp;
byte[] ulongBuffer = new byte[8];
byte[] context = ContextHelper.Context;
do
{
uint size;
res = stackwalk.GetContext(ContextHelper.ContextFlags, ContextHelper.Length, out size, context);
if (res < 0 || res == 1)
{
break;
}
ulong ip = BitConverter.ToUInt32(context, ContextHelper.InstructionPointerOffset);
ulong sp = BitConverter.ToUInt32(context, ContextHelper.StackPointerOffset);
res = stackwalk.Request(0xf0000000, 0, null, (uint)ulongBuffer.Length, ulongBuffer);
ulong frameVtbl = 0;
if (res >= 0)
{
frameVtbl = BitConverter.ToUInt64(ulongBuffer, 0);
if (frameVtbl != 0)
{
sp = frameVtbl;
ReadPointer(sp, out frameVtbl);
}
}
DesktopStackFrame frame = GetStackFrame(thread, res, ip, sp, frameVtbl);
yield return(frame);
} while (stackwalk.Next() == 0);
}
finally
{
if (task != null)
{
Marshal.FinalReleaseComObject(task);
}
if (stackwalk != null)
{
Marshal.FinalReleaseComObject(stackwalk);
}
}
}