public static ICorDebugFrame Next(this ICorDebugFrameEnum corEnum)
{
ICorDebugFrame[] corFrames = new ICorDebugFrame[] { null };
uint framesFetched = corEnum.Next(1, corFrames);
return(corFrames[0]);
}
internal ICorDebugFrame GetFrameAt(FrameID frameID)
{
process.AssertPaused();
ICorDebugChainEnum corChainEnum = CorThread.EnumerateChains();
if (frameID.ChainIndex >= corChainEnum.Count)
{
throw new ArgumentException("Chain index too big", "chainIndex");
}
corChainEnum.Skip(corChainEnum.Count - frameID.ChainIndex - 1);
ICorDebugChain corChain = corChainEnum.Next();
if (corChain.IsManaged == 0)
{
throw new ArgumentException("Chain is not managed", "chainIndex");
}
ICorDebugFrameEnum corFrameEnum = corChain.EnumerateFrames();
if (frameID.FrameIndex >= corFrameEnum.Count)
{
throw new ArgumentException("Frame index too big", "frameIndex");
}
corFrameEnum.Skip(corFrameEnum.Count - frameID.FrameIndex - 1);
return(corFrameEnum.Next());
}
//
// IEnumerator interface
//
#region IEnumerator Members
public bool MoveNext()
{
var a = new ICorDebugFrame[1];
uint c = 0;
int r = m_enum.Next((uint)a.Length, a, out c);
if (r == 0 && c == 1) // S_OK && we got 1 new element
{
m_frame = new CorFrame(a[0]);
}
else
{
m_frame = null;
}
return(m_frame != null);
}
// ICorDebugEnum
public static IEnumerable <ICorDebugFrame> GetEnumerator(this ICorDebugFrameEnum corEnum)
{
corEnum.Reset();
while (true)
{
ICorDebugFrame[] corFrames = new ICorDebugFrame[EnumerateBufferSize];
uint fetched = corEnum.Next(EnumerateBufferSize, corFrames);
if (fetched == 0)
{
yield break;
}
for (int i = 0; i < fetched; i++)
{
yield return(corFrames[i]);
}
}
}
internal StackFrame GetStackFrameAt(uint chainIndex, uint frameIndex)
{
process.AssertPaused();
ICorDebugChainEnum corChainEnum = CorThread.EnumerateChains();
if (chainIndex >= corChainEnum.GetCount())
{
throw new DebuggerException("The requested chain index is too big");
}
corChainEnum.Skip(corChainEnum.GetCount() - chainIndex - 1);
ICorDebugChain corChain = corChainEnum.Next();
if (corChain.IsManaged() == 0)
{
throw new DebuggerException("The requested chain is not managed");
}
ICorDebugFrameEnum corFrameEnum = corChain.EnumerateFrames();
if (frameIndex >= corFrameEnum.GetCount())
{
throw new DebuggerException("The requested frame index is too big");
}
corFrameEnum.Skip(corFrameEnum.GetCount() - frameIndex - 1);
ICorDebugFrame corFrame = corFrameEnum.Next();
if (!(corFrame is ICorDebugILFrame))
{
throw new DebuggerException("The rquested frame is not IL frame");
}
StackFrame stackFrame = new StackFrame(this, (ICorDebugILFrame)corFrame, chainIndex, frameIndex);
return(stackFrame);
}
// See docs\Stepping.txt
public void CheckExpiration()
{
try {
ICorDebugChainEnum chainEnum = CorThread.EnumerateChains();
} catch (COMException e) {
// 0x8013132D: The state of the thread is invalid.
// 0x8013134F: Object is in a zombie state
// 0x80131301: Process was terminated.
if ((uint)e.ErrorCode == 0x8013132D ||
(uint)e.ErrorCode == 0x8013134F ||
(uint)e.ErrorCode == 0x80131301)
{
this.Expire();
return;
}
else
{
throw;
}
}
if (process.Evaluating)
{
return;
}
ICorDebugChainEnum corChainEnum = CorThread.EnumerateChains();
int maxChainIndex = (int)corChainEnum.Count - 1;
ICorDebugFrameEnum corFrameEnum = corChainEnum.Next().EnumerateFrames();
// corFrameEnum.Count can return 0 in ExitThread callback
int maxFrameIndex = (int)corFrameEnum.Count - 1;
ICorDebugFrame lastFrame = corFrameEnum.Next();
// Check the token of the current function - function can change if there are multiple handlers for an event
Function function;
if (lastFrame != null &&
functionCache.TryGetValue(new FrameID((uint)maxChainIndex, (uint)maxFrameIndex), out function) &&
function.Token != lastFrame.FunctionToken)
{
functionCache.Remove(new FrameID((uint)maxChainIndex, (uint)maxFrameIndex));
function.OnExpired(EventArgs.Empty);
}
// Expire all functions behind the current maximum
// Multiple functions can expire at once (test case: Step out of Button1Click in simple winforms application)
List <KeyValuePair <FrameID, Function> > toBeRemoved = new List <KeyValuePair <FrameID, Function> >();
foreach (KeyValuePair <FrameID, Function> kvp in functionCache)
{
if ((kvp.Key.ChainIndex > maxChainIndex) ||
(kvp.Key.ChainIndex == maxChainIndex && kvp.Key.FrameIndex > maxFrameIndex))
{
toBeRemoved.Add(kvp);
}
}
foreach (KeyValuePair <FrameID, Function> kvp in toBeRemoved)
{
functionCache.Remove(kvp.Key);
kvp.Value.OnExpired(EventArgs.Empty);
}
}
