gc_mark_locations 3975 gc.c               gc_mark_locations(&rb_objspace, start, end);
gc_mark_locations 4174 gc.c               gc_mark_locations(objspace, stack_start, stack_end);
gc_mark_locations 4176 gc.c               gc_mark_locations(objspace,
gc_mark_locations 4181 gc.c               gc_mark_locations(objspace,