h_trunc          2669 gc/os_dep.c        struct hblk * h_trunc;  /* Truncated to page boundary */
h_trunc          2675 gc/os_dep.c        h_trunc = (struct hblk *)((word)h & ~(GC_page_size-1));
h_trunc          2679 gc/os_dep.c        for (current = h_trunc; current < h_end; ++current) {
h_trunc          2686 gc/os_dep.c        UNPROTECT(h_trunc, (ptr_t)h_end - (ptr_t)h_trunc);