rb_raw_obj_info  9278 gc.c               return rb_raw_obj_info(buff, OBJ_INFO_BUFFERS_SIZE, obj);
rb_raw_obj_info  9303 gc.c               fprintf(stderr, "rb_obj_info_dump: %s\n", rb_raw_obj_info(buff, 0x100, obj));
rb_raw_obj_info    90 gc.h           const char *rb_raw_obj_info(char *buff, const int buff_size, VALUE obj);