X-Recipient:	archive-cygwin AT delorie DOT com
DomainKey-Signature:	a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:from:to:subject:date:message-id:references
	:in-reply-to:content-type:mime-version; q=dns; s=default; b=FKLY
	bazrAEVm0t+yKOK48G2+sUPzzEpifr4oZxb6h/kwZdx+itETqE5VESpWERQifRgp
	/TqtdnK/znENIPJ/DQyHJFEbMb5BBPvGQbMsFBRfyj4H3PWr/gLHg0OOppmDPAGg
	Uf8i8sSr2b3blmAqysiJRjRKcJVjqc/KUW4y1UQ=
DKIM-Signature:	v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:from:to:subject:date:message-id:references
	:in-reply-to:content-type:mime-version; s=default; bh=WtukK9EyvO
	32sAm9r6vpuw7pXtM=; b=sYG+NIavb8pAgyZuGS1nprf//U+CRoKNSkNR502fUI
	NGw/46uB+o/3FuXwG3Y7B0y4E5mlVjRuDldOOoHqiU2Z+hjZZPUy/xis70h6WCHp
	HSCYEgTtVKaHAi+BzUPGXuBnbMu6tQj8AUMc0+Y5zgJafaMKj2isvtQRrTM4YvJT
	E=
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com
Authentication-Results:	sourceware.org; auth=none
X-Virus-Found:	No
X-Spam-SWARE-Status:	No, score=0.1 required=5.0 tests=BAYES_50,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2
X-HELO:	gwo5.mbox.net
X-USANET-Received:	from gwo5.mbox.net [127.0.0.1] by gwo5.mbox.net via mtad (C8.MAIN.4.02J) with ESMTP id 999TJVciM5248Mo5; Thu, 22 Oct 2015 02:08:38 -0000
X-USANET-Routed:	5 gwsout-gwsd Q:gwsd
X-USANET-Routed:	3 gwsout-vs Q:bmvirus
X-USANET-GWS2-Tenant:	electric-cloud.com
X-USANET-GWS2-Tagid:	ECLD
X-USANET-Source:	165.212.120.254 OUT aeolus AT electric-cloud DOT com S1P5HUB8.EXCHPROD.USA.NET TLS
X-USANET-MsgId:	XID543TJVciM6152Xo5
From:	John Carey <aeolus AT electric-cloud DOT com>
To:	"cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject:	RE: pthread_kill: signals remain pending after target thread exits
Date:	Thu, 22 Oct 2015 02:08:38 +0000
Message-ID:	<28F5B565B6F6424C87E4AC0DCC84316575D73A86@S1P5DAG5C.EXCHPROD.USA.NET>
References:	<28F5B565B6F6424C87E4AC0DCC84316575D71070 AT S1P5DAG5C DOT EXCHPROD DOT USA DOT NET>,<20151021114810 DOT GQ5319 AT calimero DOT vinschen DOT de>
In-Reply-To:	<20151021114810.GQ5319@calimero.vinschen.de>
MIME-Version:	1.0
X-IsSubscribed:	yes

--_002_28F5B565B6F6424C87E4AC0DCC84316575D73A86S1P5DAG5CEXCHPR_
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

> From: Corinna Vinschen [corinna-cygwin AT cygwin DOT com]
> Sent: Wednesday, October 21, 2015 4:48 AM
> Subject: Re: pthread_kill: signals remain pending after target thread exi=
ts
...
> > On Sep 11 18:11, John Carey wrote:
> > There seems to be a problem with pthread_kill: a pending signal
> > targeting a particular thread prevents other threads from receiving
> > signals sharing the same signal number--even after the original target
> > thread exits and is joined.
...
> The important thing here is to get rid of the pending signal.

Yes, I agree that is the most important thing.

> > In my view it would be desirable if:
> >
> >   - Pending signals targeting a particular thread would not outlast
> >   that thread.
>=20
> Since you looked into the code anyway, do you have an idea how to
> implement that?  For a start, do you have a simple testcase, only
> the bare code needed to reproduce the issue?

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.)

As to a fix: sorry, but though I looked at the code, I am not sufficiently =
confident to suggest a specific change.  I think that the internal signal h=
andling thread has exclusive access to the pending signal collection, which=
 is one difficulty.  And I'm not sure how the race is resolved between some=
thing trying to use the cygtls and the cygtls being destroyed.  At a guess,=
 there are at least two general approaches to a fix:

1. Somehow prevent new signals from being sent to the terminating thread, t=
hen notify the internal signal handling thread of the need to purge pending=
 signals targeting the doomed thread, then delay cygtls destruction until c=
onfirmation that that purge is complete.

2. In the pending signal representation, replace the direct cygtls address =
with a pointer to some small reference-counted object associated with the c=
ygtls.  That small object could live on for a while, even after the origina=
l cygtls has been destroyed and its memory reused for a new cygtls, so that=
 the signal processing thread can take its time purging references.  But th=
ere has to be some way to atomically do two things: 1) check whether this s=
mall object still points to a valid cygtls, and 2) if it does, delay destru=
ction of that cygtls until some task has been performed (such as processing=
 a signal).  Perhaps this small object could contain an invalidation flag a=
nd some synchronization objects (mutex, condition variable, etc.) in additi=
on to the raw cygtls pointer.

> >   - Multiple pending signals targeting different threads could
> >   coexist, even if they shared the same signal number.  This happens
> >   on Linux (Ubuntu 14.04.3), where I can generate two signals for two
> >   different threads, then sleep for a bit in each target thread, and
> >   finally have each thread receive its signal with sigwait()--neither
> >   signal is lost during the sleeping period.
>=20
> That requires to extend the handling for pending signals.  That's
> a rather bigger task...

Yeah.  It's nice if threads don't interfere with each other, but this part =
would indeed be harder to change.

-- John Carey

--_002_28F5B565B6F6424C87E4AC0DCC84316575D73A86S1P5DAG5CEXCHPR_
Content-Type: text/x-csrc; name="test_pending_signal.c"
Content-Description: test_pending_signal.c
Content-Disposition: attachment; filename="test_pending_signal.c"; size=6688;
	creation-date="Thu, 22 Oct 2015 01:10:32 GMT";
	modification-date="Thu, 22 Oct 2015 01:10:32 GMT"
Content-Transfer-Encoding: base64
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--_002_28F5B565B6F6424C87E4AC0DCC84316575D73A86S1P5DAG5CEXCHPR_
Content-Type: text/plain; charset=us-ascii

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
--_002_28F5B565B6F6424C87E4AC0DCC84316575D73A86S1P5DAG5CEXCHPR_--

- Raw text -