USED_HEAP_SIZE    596 gc/allchblk.c  		&& USED_HEAP_SIZE >= GC_requested_heapsize
USED_HEAP_SIZE    719 gc/alloc.c     	    GC_used_heap_size_after_full = USED_HEAP_SIZE;
USED_HEAP_SIZE    723 gc/alloc.c     		 BYTES_TO_WORDS(USED_HEAP_SIZE - GC_used_heap_size_after_full)