_thr_try_gc
_thr_try_gc(curthread, new_thread); /* thread lock released */
_thr_try_gc(curthread, new_thread);
_thr_try_gc(curthread, pthread); /* thread lock released */
_thr_try_gc(curthread, curthread); /* thread lock released */
_thr_try_gc(curthread, pthread); /* thread lock released */
_thr_try_gc(curthread, thread);
void _thr_try_gc(struct pthread *, struct pthread *) __hidden;
_thr_try_gc(curthread, thread);