/// <summary>
/// Visits the given object reference
/// </summary>
/// <param name="frameEntry">The frame entry for the reference</param>
/// <param name="visitReference">Called for valid references</param>
private void VisitObjectReference(StackFrameEntry frameEntry, VisitObjectReference visitReference)
{
if (frameEntry.Type.IsReference)
{
//Don't visit nulls
if (frameEntry.Value == 0)
{
return;
}
visitReference(frameEntry);
}
}
/// <summary>
/// Visits all the object references in all start frames, starting at the given frame
/// </summary>
/// <param name="stackFrame">The stack frame to start at</param>
/// <param name="visitReference">Function called for each reference</param>
/// <param name="visitFrame">Function called for each frame</param>
public void VisitObjectReferences(StackFrame stackFrame, VisitObjectReference visitReference, VisitFrame visitFrame)
{
visitFrame?.Invoke(stackFrame);
//Visit the calling stack frame
this.VisitObjectReferencesInFrame(stackFrame, visitReference);
//Then all other stack frames
foreach (var callStackEntry in this.callStack.GetEntries(stackFrame.BasePointer))
{
var callStackFrame = new StackFrame(callStackEntry);
visitFrame?.Invoke(callStackFrame);
this.VisitObjectReferencesInFrame(callStackFrame, visitReference);
}
}
/// <summary>
/// Visits all the object references in the given stack frame
/// </summary>
/// <param name="stackFrame">The stack frame</param>
/// <param name="visitReference">Function called for each reference</param>
private void VisitObjectReferencesInFrame(StackFrame stackFrame, VisitObjectReference visitReference)
{
foreach (var entry in stackFrame.GetArguments())
{
this.VisitObjectReference(entry, visitReference);
}
foreach (var entry in stackFrame.GetLocals())
{
this.VisitObjectReference(entry, visitReference);
}
foreach (var entry in stackFrame.GetStackOperands())
{
this.VisitObjectReference(entry, visitReference);
}
}
