The alternate signal stack may be sufficiently beyond the esimated frame size
(100k). If we run into the case that the frame is not in the correct direction
assume that the frames may be non-contiguous due to an alternate signal stack
layout. In such a case, if we find that there is an alternate stack configured,
ignore the discontiuity (assuming that it is a removable point-wise
discontinuity) and continue the stack unwinding. This permits us to capture
stack traces in more cases.
PiperOrigin-RevId: 458327775
Change-Id: Ia8b461847401492f72a23ba26601c72e0109402c
