MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, cDlabel);
p = (ptr_t) c->protectionDomain;
MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, cPlabel);
MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, cDlabel);
p = (ptr_t) c->protectionDomain;
MAYBE_MARK (p, mark_stack_ptr, mark_stack_limit, c, cPlabel);