pthread_kill: signals remain pending after target thread exits
Corinna Vinschen
corinna-cygwin@cygwin.com
Mon Nov 2 17:58:00 GMT 2015
On Nov 2 15:18, Corinna Vinschen wrote:
> On Oct 29 16:16, John Carey wrote:
> > > From: Corinna Vinschen [corinna-cygwin@cygwin.com]
> > > Sent: Thursday, October 29, 2015 1:02 AM
> > > On Oct 28 10:14, Corinna Vinschen wrote:
> > ...
> > > > > Thanks; that was fast! I tried replacing cygwin1.dll with cygwin1-20151023.dll .
> > > > >
> > > > > The original test case now works. I checked some of my other tests,
> > > > > and unfortunately some of them failed, so I extracted out a new test
> > > > > case, which is attached. My guess is that something is subtly different
> > > > > about the timing on this test.
> > > >
> > > > Is this a regression? Did it work with 2.2.1?
> > >
> > > Answering myself here, this didn't work at all in 2.2.1. I can
> > > reproduce the problem and I'm going to take a look. Not sure if
> > > there's a quick solution, though. This looks like a deadlock
> > > situation. The signal definitely got send, I just don't see yet
> > > why it's not handled in wait_sig.
> >
> > Yes, test_pending_signal2.c fails in 2.2.1, though the symptoms
> > differ: there is no Cygwin process left hanging that cannot be
> > killed by a Cygwin signal.
> >
> > But both tests appear to pass in Cygwin 1.7.9, so in that sense
> > it is a regression, just not a recent one.
>
> The regression here was my original fix. It didn't clear pending
> signals for an exiting thread thorougly enough. I applied a patch now
> which should fix this issue. I'll upload a new developer snapshot to
> https://cygwin.com/snapshots/ later today or tomorrow (still looking
> into the PrlFS issue). Please give it a try.
Snapshot is up. The fix is in the 2.3.0-0.5 test release as well.
Please give any one of them a try.
Thanks,
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
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