From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 96166 invoked by alias); 1 May 2015 20:25:52 -0000 Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Received: (qmail 96154 invoked by uid 89); 1 May 2015 20:25:51 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-2.0 required=5.0 tests=AWL,BAYES_00,SPF_HELO_PASS,SPF_PASS,T_RP_MATCHES_RCVD autolearn=ham version=3.3.2 X-HELO: limerock02.mail.cornell.edu Received: from limerock02.mail.cornell.edu (HELO limerock02.mail.cornell.edu) (128.84.13.242) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Fri, 01 May 2015 20:25:50 +0000 X-CornellRouted: This message has been Routed already. Received: from authusersmtp.mail.cornell.edu (granite3.serverfarm.cornell.edu [10.16.197.8]) by limerock02.mail.cornell.edu (8.14.4/8.14.4_cu) with ESMTP id t41KPmWP016190 for ; Fri, 1 May 2015 16:25:48 -0400 Received: from [128.84.234.163] ([128.84.234.163]) (authenticated bits=0) by authusersmtp.mail.cornell.edu (8.14.4/8.12.10) with ESMTP id t41KPmTP005446 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT) for ; Fri, 1 May 2015 16:25:48 -0400 Message-ID: <5543E14A.1010802@cornell.edu> Date: Fri, 01 May 2015 20:38:00 -0000 From: Ken Brown User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 MIME-Version: 1.0 To: cygwin@cygwin.com Subject: Re: [ANNOUNCEMENT] Updated: xorg-server-1.17.1-3 References: <5542AA7E.5070504@cornell.edu> <55436A0A.2010603@dronecode.org.uk> <554374FF.7060708@cornell.edu> <5543C3C5.1060003@dronecode.org.uk> In-Reply-To: <5543C3C5.1060003@dronecode.org.uk> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-IsSubscribed: yes X-SW-Source: 2015-05/txt/msg00018.txt.bz2 On 5/1/2015 2:19 PM, Jon TURNEY wrote: > On 01/05/2015 13:43, Ken Brown wrote: >> On 5/1/2015 7:56 AM, Jon TURNEY wrote: >>> On 30/04/2015 23:19, Ken Brown wrote: >>>> On 4/29/2015 1:26 PM, Jon TURNEY wrote: >>>>> >>>>> The following packages have been updated in the Cygwin distribution: >>>>> >>>>> *** xorg-server-*1.17.1-3 >>>> >>>> I'm finding, on three different 64-bit Cygwin systems, that the server >>>> dies shortly after starting. I'm attaching XWin.0.log from one of >>>> them. >>>> The log from a 32-bit Cygwin install on the same machine starts the >>>> same but then continues with >>>> >>>> [440201.140] winPointerWarpCursor - Discarding first warp: 640 512 >>>> [440201.140] (--) 8 mouse buttons found >>>> [440201.140] (--) Setting autorepeat to delay=500, rate=31 >>>> [...] >>>> >>>> The problem goes away if I revert to 1.17.1-2. Let me know if there's >>>> further information that I can provide. >>> >>> That is rather mysterious and disappointing. I can't reproduce this. >>> >>> Does this occur if you run XWin directly? >> >> Yes. >> >>> If so, could you perhaps upload a strace somewhere, please? >> >> http://sanibeltranquility.com/cygwin/xwin.trace.xz > > Thanks. > > This ends with ... > > --- Process 2996, exception c0000005 at 0000000180155C82 > > and... > > $ addr2line -e /usr/lib/debug/usr/bin/cygwin1.dbg 0x0000000180155C82 > /usr/src/debug/cygwin-2.0.1-1/winsup/cygwin/malloc.cc:4753 > > ... which is somewhere inside free(). > > I don't quite understand why cygwin's exception processing doesn't then > catch that exception and raise a SIGSEGV. > > However, I did a bit more staring at the changes in 1.17.1-3 and I did > find a nasty bug in some code which uses the heap. I've uploaded a > snapshot [1] with a possible fix, please test that if you can. That fixes it. Thanks. Ken -- 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