UNPROTECT 2620 gc/os_dep.c UNPROTECT(h, GC_page_size); UNPROTECT 2686 gc/os_dep.c UNPROTECT(h_trunc, (ptr_t)h_end - (ptr_t)h_trunc); UNPROTECT 2946 gc/os_dep.c UNPROTECT(start_block, UNPROTECT 3883 gc/os_dep.c UNPROTECT(h, GC_page_size);