X-Recipient:	archive-cygwin AT delorie DOT com
DKIM-Filter:	OpenDKIM Filter v2.11.0 sourceware.org 2DB1A386F422
DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
	s=default; t=1587424141;
	bh=AwuxbR+4Msqn00TTSYBRK121VqPftWruPFADhetTubo=;
	h=Subject:To:Date:In-Reply-To:References:List-Id:List-Unsubscribe:
	List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:
	From;
	b=E2sqSP213kknUk2iYSepUL3mKFMpiorEKGx8KzfgbTBaGxoVHBjRlyJCW8K/bjqLk
	TXwg/993EN/AFWjiY1pKrRMbe8BjZueRHyEvlazu7t2BUM2DEeBtjIptUnpulwIAso
	/KALcirL9kJH3kr1U+d+F+FC3bqMFPHJLG8O9CmM=
X-Original-To:	cygwin AT cygwin DOT com
Delivered-To:	cygwin AT cygwin DOT com
DMARC-Filter:	OpenDMARC Filter v1.3.2 sourceware.org EDC4B384A87E
X-Google-DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed;
	d=1e100.net; s=20161025;
	h=x-gm-message-state:message-id:subject:from:to:date:in-reply-to
	:references:user-agent:mime-version:content-transfer-encoding;
	bh=qiB8ZqJQhcrSpXkoAg08zeJsy+k4cF3w5tENGKzPTtQ=;
	b=qD2dkfKhBgkv0ONjq/Y58m7JhU3WbIV/BTzl/VFjSSMd1oxQ1rKRMh2hDG2Ku1WAf4
	VVyky7YjjxJGFdpil5aFtJdO+uK1nSb2OylDubASNfBFeX4bvYvFrM9PvajSgDKIh3My
	72yIrxdmWoFu3PzIE5aKCNAm7F7/uKYjydXZZ2VTMEnDF8OEhRJPoAXJQC5FoKOjl74d
	qCJQB0Aof816evcYXKt18+MOCMCJchyznqEgWrhtykaRuqmw4jfTMENNQiV5xWJ86d+d
	mWVcZHyE4cc85jMO/6lVQzPz+tD1oioAgnwTt0jL5vCg0wNgaWLsKBAxZK7pZ6NTuH5o
	Liig==
X-Gm-Message-State:	AGi0PuZFi3BoAg0GdF/5yHcujbMUDfialczrmhWidWbYJpprw5NPEqV/
	G30k0tLrFN5NF784xVzW1RY=
X-Google-Smtp-Source:	APiQypIwUJbvbACtL8v0UXtUvmneOOpyz4K8lQscbrURCgHRHqukzMIDbKh1uPZNzSIoV99FTVL88g==
X-Received:	by 2002:a17:90a:5a:: with SMTP id 26mr2119774pjb.74.1587424134921;
	Mon, 20 Apr 2020 16:08:54 -0700 (PDT)
Message-ID:	<d8947c4dbbc3446c4dbe67bfb2ed028370697a8a.camel@gmail.com>
Subject:	Re: X crashes with SIGPIPE
To:	Jon Turney <jon DOT turney AT dronecode DOT org DOT uk>,
	The Cygwin Mailing List
	<cygwin AT cygwin DOT com>
Date:	Mon, 20 Apr 2020 16:08:51 -0700
In-Reply-To:	<a4840a16-3739-a340-8c1f-23ad10b0d48c@dronecode.org.uk>
References:	<faff3a3252644ab0f41d02854413932c9932e7af DOT camel AT gmail DOT com>
	<a4840a16-3739-a340-8c1f-23ad10b0d48c AT dronecode DOT org DOT uk>
User-Agent:	Evolution 3.30.5-1.1
MIME-Version:	1.0
X-Spam-Status:	No, score=-2.0 required=5.0 tests=BAYES_00, DKIM_SIGNED,
	DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,
	SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2
X-Spam-Checker-Version:	SpamAssassin 3.4.2 (2018-09-13) on
	server2.sourceware.org
X-BeenThere:	cygwin AT cygwin DOT com
X-Mailman-Version:	2.1.29
List-Id:	General Cygwin discussions and problem reports <cygwin.cygwin.com>
List-Unsubscribe:	<http://cygwin.com/mailman/options/cygwin>,
	<mailto:cygwin-request AT cygwin DOT com?subject=unsubscribe>
List-Archive:	<https://cygwin.com/pipermail/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-request AT cygwin DOT com?subject=help>
List-Subscribe:	<http://cygwin.com/mailman/listinfo/cygwin>,
	<mailto:cygwin-request AT cygwin DOT com?subject=subscribe>
From:	Henry Gebhardt via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Henry Gebhardt <hsggebhardt AT gmail DOT com>
Errors-To:	cygwin-bounces AT cygwin DOT com
Sender:	"Cygwin" <cygwin-bounces AT cygwin DOT com>

On Mon, 2020-04-20 at 18:03 +0100, Jon Turney wrote:
> On 18/04/2020 04:38, Henry Gebhardt via Cygwin wrote:
> > Hi,
> > 
> > Cygwin/X crashes every few days for me. I managed to obtain a
> > backtrace
> > from the last crash (attached). Server log is also included.
> > 
> > I have not, yet, managed to pin down the exact trigger for the
> > crash. I
> > am running two graphical programs under Windows 10 WSL2 Debian:
> > tilix
> > and evince.
> > 
> > Thank you for any help.
> 
> Thanks for reporting this issue.
> 
> I am assuming, although it's not totally clear from your report,
> that 
> you are starting the X server with '-listen tcp', and are setting 
> DISPLAY to localhost:0.0 or similar in your WSL environment.

Yes, indeed! Also with "-nowgl", but I assume that is irrelevant.

> 
> > Thread 1 received signal SIGPIPE, Broken pipe.
> > [Switching to Thread 2952.0x1144]
> > 0x000000010053f250 in _XSERVTransSocketWritev (ciptr=0xffffbb18,
> >     buf=0xffffbc10, size=-17396) at
> > /usr/include/X11/Xtrans/Xtranssock.c:2382
> > 2382    /usr/include/X11/Xtrans/Xtranssock.c: No such file or
> > directory.
> 
> I'm not sure this is the actual point of failure (since the X server 
> should be setting SIGPIPE to be ignored), so you probably need to
> tell 
> gdb not to stop on it e.g. 'handle sigpipe ignore'.

Thank you for this. I will run with sigpipe ignored, and see if I can
reproduce then. Might be a few days until it triggers.

> 
> In any case, a sigpipe here indicates that the X client has already 
> closed when the X server tries to write to it's socket.
> 
> Assuming gdb is giving accurate information here, this is also looks 
> very odd, as a negative value of size (which is used as iovcnt passed
> to 
> write) doesn't make a lot of sense.


Best,
Henry

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

- Raw text -