rb_thread_list_t  558 thread.c           rb_thread_list_t *join_list;
rb_thread_list_t  828 thread.c       	rb_thread_list_t **p = &target_th->join_list;
rb_thread_list_t  889 thread.c       	rb_thread_list_t list;
rb_thread_list_t 4880 thread.c       	    rb_thread_list_t *list = th->join_list;
rb_thread_list_t  753 vm_core.h          rb_thread_list_t *join_list;