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());
}
// 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);
}
}