Mono.Debugger.Backtrace.TryCallback C# (CSharp) Method

        private bool TryCallback(ThreadServant thread, TargetMemoryAccess memory,
					  ref StackFrame frame, bool exact_match)
        {
            try {
                if (frame == null)
                    return false;

                Inferior.CallbackFrame callback = thread.GetCallbackFrame (
                    frame.StackPointer, exact_match);
                if (callback == null)
                    return false;

                frame = thread.Architecture.CreateFrame (
                    thread.Client, FrameType.Normal, memory, callback.Registers);

                FrameType callback_type;
                string frame_name = "<method called from mdb>";

                if (callback.IsRuntimeInvokeFrame) {
                    callback_type = FrameType.RuntimeInvoke;
                    TargetFunctionType func = thread.GetRuntimeInvokedFunction (callback.ID);
                    if (func != null)
                        frame_name = String.Format ("<Invocation of: {0}>", func.FullName);
                } else {
                    callback_type = FrameType.Callback;
                }

                AddFrame (new StackFrame (
                    thread.Client, callback_type, callback.CallAddress, callback.StackPointer,
                    TargetAddress.Null, callback.Registers, thread.NativeLanguage,
                    new Symbol (frame_name, callback.CallAddress, 0)));
                return true;
            } catch (TargetException) {
                return false;
            }
        }