The sigpending mechanism failed to check if the pending signal was a
process-wide signal, or a signal for the curent thread. Fix that by
adding a matching conditional to wait_sig's __SIGPENDING code.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
- Fix a timerfd deadlock.
Addresses: https://cygwin.com/ml/cygwin/2019-06/msg00096.html
+
+- Fix sigpending() incorrectly returning signals for unrelated threads.
+ Addresses: https://cygwin.com/ml/cygwin/2019-07/msg00051.html
*pack.mask = 0;
tl_entry = cygheap->find_tls (pack.sigtls);
while ((q = q->next))
- if (pack.sigtls->sigmask & (bit = SIGTOMASK (q->si.si_signo)))
- *pack.mask |= bit;
+ {
+ /* Skip thread-specific signals for other threads. */
+ if (q->sigtls && pack.sigtls != q->sigtls)
+ continue;
+ if (pack.sigtls->sigmask & (bit = SIGTOMASK (q->si.si_signo)))
+ *pack.mask |= bit;
+ }
cygheap->unlock_tls (tl_entry);
}
break;