public override void Reset()
{
// There is no way to reset. Just create a new one.
CorStackWalk s = m_th.CreateStackWalk(CorStackWalkType.ExtendedV3StackWalk);
m_sw = s.GetInterface();
m_frame = null;
}
public virtual void Reset()
{
// There is no way to reset. Just create a new one.
CorStackWalk s = m_th.CreateStackWalk(CorStackWalkType.PureV3StackWalk);
m_sw = s.GetInterface();
m_frame = null;
}
// This method handles internal frames but no child frames.
private bool MoveNextWorker()
{
if (m_bEndOfStackFrame)
{
return(false);
}
bool fIsLeafFrame = false;
bool fIsFuncEvalFrame = false;
int hr;
if (m_init)
{
// this the 2nd or more call to MoveNext() and MoveNextWorker()
if ((m_frame != null) && (m_frame.FrameType == CorFrameType.InternalFrame))
{
// We have just handed out an internal frame, so we need to start looking at the next
// internal frame AND we don't call m_sw.Next() to preserve the previous managed frame
if (m_internalFrameIndex < m_internalFrames.Length)
{
m_internalFrameIndex++;
}
fIsFuncEvalFrame = (m_frame.InternalFrameType == CorDebugInternalFrameType.STUBFRAME_FUNC_EVAL);
hr = (int)HResult.S_OK;
}
else
{
// We just handed out a managed or native frame.
// In any case, use the managed unwinder to unwind.
hr = m_sw.Next();
// Check for end-of-stack condition.
if (hr == (int)HResult.CORDBG_S_AT_END_OF_STACK)
{
m_bEndOfStackFrame = true;
}
}
}
else
{
// this is the initial call to MoveNext() and MoveNextWorker() that validates the enumeration
// after we return from MoveNext(), .Current will point to the leaf-most frame
m_init = true;
fIsLeafFrame = true;
hr = (int)HResult.S_OK;
}
// Check for errors.
if (HRUtils.IsFailingHR(hr))
{
Marshal.ThrowExceptionForHR(hr);
}
if (!m_bEndOfStackFrame)
{
// Now we need to do a comparison between the current stack frame and the internal frame (if any)
// to figure out which one to give back first.
ICorDebugFrame frame;
m_sw.GetFrame(out frame);
if (frame == null)
{
// this represents native frame(s) to managed code, we return true because there may be more
// managed frames beneath
m_frame = null;
return(true);
}
// we compare the current managed frame with the internal frame
CorFrame currentFrame = new CorFrame(frame);
for (; m_internalFrameIndex < m_internalFrames.Length; m_internalFrameIndex++)
{
CorFrame internalFrame = m_internalFrames[m_internalFrameIndex];
// Check for internal frame types which are not exposed in V2.
if (IsV3InternalFrameType(internalFrame))
{
continue;
}
if (internalFrame.IsCloserToLeaf(currentFrame))
{
currentFrame = internalFrame;
}
else if (internalFrame.InternalFrameType == CorDebugInternalFrameType.STUBFRAME_M2U)
{
// we need to look at the caller stack frame's SP
INativeContext ctx = this.GetContext();
CorStackWalk tStack = m_th.CreateStackWalk(CorStackWalkType.PureV3StackWalk);
CorDebugSetContextFlag flag = ((fIsFuncEvalFrame || fIsLeafFrame) ?
CorDebugSetContextFlag.SET_CONTEXT_FLAG_ACTIVE_FRAME :
CorDebugSetContextFlag.SET_CONTEXT_FLAG_UNWIND_FRAME);
tStack.SetContext(flag, ctx);
//tStack now points to the "previous" managed frame, not the managed frame we're looking at
//the first MoveNext call moves the temporary stackwalker to the "current" frame and the next
//MoveNext call moves the temporary stackwalker to the "caller" frame
Int64 current = 0, caller = 0;
if (tStack.MoveNext())
{
if (tStack.Current != null)
{
current = tStack.GetContext().StackPointer.ToInt64();
}
}
if (tStack.MoveNext())
{
if (tStack.Current != null)
{
caller = tStack.GetContext().StackPointer.ToInt64();
}
}
if (current == 0 || caller == 0)
{
//we've hit a native frame somewhere, we shouldn't be doing anything with this
break;
}
if (current < caller && internalFrame.IsCloserToLeaf(tStack.Current))
{
// if there is no caller frame or the current managed frame is closer to the leaf frame
// than the next managed frame on the stack (the caller frame), then we must be in the case
// where:
// [IL frame without metadata]
// [Internal frame, 'M --> U']
// Caller frame (managed)
// We need to flip the internal and IL frames, so we hand back the internal frame first
currentFrame = internalFrame;
}
}
break;
}
m_frame = currentFrame;
return(true);
}
else
{
// We have reached the end of the managed stack.
// Check to see if we have any internal frames left.
for (; m_internalFrameIndex < m_internalFrames.Length; m_internalFrameIndex++)
{
CorFrame internalFrame = m_internalFrames[m_internalFrameIndex];
if (IsV3InternalFrameType(internalFrame))
{
continue;
}
m_frame = internalFrame;
return(true);
}
return(false);
}
}