+ pthread_t self = __pthread_self();
+ __pthread_tsd_run_dtors(self);
+ self->cancel = 0;
+ self->cancelbuf = 0;
+ self->canceldisable = 0;
+ self->cancelasync = 0;
+ self->unblock_cancel = 0;
+ longjmp(p, 1);
+}
+
+static void timer_handler(int sig, siginfo_t *si, void *ctx)
+{
+ pthread_t self = __pthread_self();
+ jmp_buf jb;
+ void (*notify)(union sigval) = (void (*)(union sigval))self->start;
+ union sigval val = { .sival_ptr = self->start_arg };
+
+ if (!setjmp(jb) && si->si_code == SI_TIMER) {
+ pthread_cleanup_push(cleanup_fromsig, jb);
+ notify(val);
+ pthread_cleanup_pop(0);
+ }
+}
+
+static void install_handler()
+{
+ struct sigaction sa = {
+ .sa_sigaction = timer_handler,
+ .sa_flags = SA_SIGINFO | SA_RESTART
+ };
+ __libc_sigaction(SIGTIMER, &sa, 0);
+ __syscall(SYS_rt_sigprocmask, SIG_UNBLOCK, SIGTIMER_SET, 0, 8);