rb_objspace_reachable_objects_from_root  865 ext/objspace/objspace.c     rb_objspace_reachable_objects_from_root(reachable_object_from_root_i, &data);
rb_objspace_reachable_objects_from_root  467 ext/objspace/objspace_dump.c     rb_objspace_reachable_objects_from_root(root_obj_i, &dc);
rb_objspace_reachable_objects_from_root   98 gc.h           void rb_objspace_reachable_objects_from_root(void (func)(const char *category, VALUE, void *), void *data);