old_segv_act      700 gc/os_dep.c    	static struct sigaction old_segv_act;
old_segv_act      732 gc/os_dep.c    	        (void) sigaction(SIGSEGV, 0, &old_segv_act);
old_segv_act      737 gc/os_dep.c    	        (void) sigaction(SIGSEGV, &act, &old_segv_act);
old_segv_act      776 gc/os_dep.c    	  (void) sigaction(SIGSEGV, &old_segv_act, 0);