int thread_db_attach_lwp (ptid_t ptid);
+/* Return the set of signals used by the threads library. */
+extern void lin_thread_get_thread_signals (sigset_t *mask);
+
/* Find process PID's pending signal set from /proc/pid/status. */
void linux_proc_pending_signals (int pid, sigset_t *pending, sigset_t *blocked, sigset_t *ignored);