6950617: Zero/Shark interface updates Summary: Zero needs a couple of new methods to allow Shark to access the new frame anchor field. Reviewed-by: twisti Contributed-by: Gary Benson <gbenson@redhat.com>

6950178: Zero stack improvements Summary: Moves the logic for determining the size of the Zero stack into the ZeroStack class. Reviewed-by: twisti Contributed-by: Gary Benson <gbenson@redhat.com>