GC_freehblk       828 gc/alloc.c         GC_freehblk(p);
GC_freehblk      1556 gc/include/private/gc_priv.h void GC_freehblk GC_PROTO((struct hblk * p));
GC_freehblk       445 gc/malloc.c            GC_freehblk(h);
GC_freehblk       482 gc/malloc.c            GC_freehblk(h);
GC_freehblk       780 gc/reclaim.c   	      GC_freehblk(hbp);
GC_freehblk       792 gc/reclaim.c             GC_freehblk(hbp);