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X-HELO:	calimero.vinschen.de
Date:	Thu, 29 Oct 2015 09:02:18 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: pthread_kill: signals remain pending after target thread exits
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On Oct 28 10:14, Corinna Vinschen wrote:
> On Oct 27 19:06, John Carey wrote:
> > Sorry for the delay.
> >=20
> > From: Corinna Vinschen [corinna-cygwin AT cygwin DOT com]
> > Sent: Friday, October 23, 2015 5:55 AM
> > > > I've attached a test case that I *think* gets into the right spot, =
at
> > > > least for 64-bit Cygwin 2.0.4.  That is, it hangs trying to receive
> > > > the signal, instead of terminating.  (This test passes (terminates)=
 in
> > > > 32-bit Cygwin 1.7.9 and 64-bit Ubuntu 14.04.3 LTS.)
> > >=20
> > > Thanks for the testcase.  I applied a patch which hopefully works as
> > > desired, at least to fix the immediate problem of the remaining pendi=
ng
> > > signal when a thread exits.  I uploaded a new developer snapshot to
> > > https://cygwin.com/snapshots.  Please give it a try.
> >=20
> > Thanks; that was fast!  I tried replacing cygwin1.dll with cygwin1-2015=
1023.dll .
> >=20
> > 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.
>=20
> 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.


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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