MAX_GETCORE
if ((size_t)nsize <= MAX_GETCORE) {
delta = MAX_GETCORE;
(void) GETCORE(-MAX_GETCORE);
nsize -= MAX_GETCORE;
if (requestsize > MAX_GETCORE) {
delta = MAX_GETCORE;
(void) GETCORE(-MAX_GETCORE);
requestsize -= MAX_GETCORE;