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:message-id:date:from:mime-version:to:subject
	:references:in-reply-to:content-type:content-transfer-encoding;
	q=dns; s=default; b=y7u1BIG2aiOnmKAZx6H7Egj9T1VnLFk9gcxj76z8t9e
	Hmh7kzlpLuj1O/MhHFF1wqwXbH0VttZx7z9wxmFN1lsKIU5nY9Pl8N6d/AuDozvc
	dfwEbOv43foKhmrAjBWwB6TtEHaRFQxo9Rm/DmzI08Ai5MWK3LgHsz5Gv43e0iao
	=
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:message-id:date:from:mime-version:to:subject
	:references:in-reply-to:content-type:content-transfer-encoding;
	s=default; bh=9xhJzZH95C6VLpaYxZF6QGL3DQw=; b=eeEikrJBdr3I1SlKD
	iE5tfeBEJdT1KoqJQWYNnhy5Y1sqqBlah2AGa44N2e8V8Twz221gf/5ZeRZKOR59
	OEFg/9Wfc6f0J/tM7rT9Jr7O8vjkO33PuvSw3b6AAzWQDnvu0GLLYip/cQoPHGYR
	XCzESeNbe0v4KWTqGaMNf3gUOc=
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
X-Spam-SWARE-Status:	No, score=-3.3 required=5.0 tests=AWL,BAYES_00,KHOP_RCVD_UNTRUST,KHOP_THREADED,RCVD_IN_DNSWL_LOW,RCVD_IN_HOSTKARMA_NO,RP_MATCHES_RCVD,SPF_NEUTRAL autolearn=ham version=3.3.2
Message-ID:	<520D85A5.1030402@cs.utoronto.ca>
Date:	Thu, 15 Aug 2013 21:51:33 -0400
From:	Ryan Johnson <ryan DOT johnson AT cs DOT utoronto DOT ca>
User-Agent:	Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130801 Thunderbird/17.0.8
MIME-Version:	1.0
To:	cygwin AT cygwin DOT com
Subject:	Re: 64-bit emacs crashes a lot
References:	<51F3151D DOT 7040000 AT cs DOT utoronto DOT ca> <51F33565 DOT 1090406 AT cornell DOT edu> <51F33F52 DOT 4060405 AT cs DOT utoronto DOT ca> <51FB1D9E DOT 5090102 AT cs DOT utoronto DOT ca> <20130802080211 DOT GA18054 AT calimero DOT vinschen DOT de> <51FB9228 DOT 2020309 AT cornell DOT edu> <51FBA100 DOT 90005 AT cs DOT utoronto DOT ca> <51FD5462 DOT 5020400 AT cs DOT utoronto DOT ca> <51FFBDFF DOT 7040501 AT cornell DOT edu> <51FFC4F2 DOT 8080909 AT cs DOT utoronto DOT ca> <5203D89E DOT 6030801 AT cornell DOT edu> <5203DCCA DOT 1010105 AT cs DOT utoronto DOT ca> <5205B364 DOT 8090007 AT cs DOT utoronto DOT ca> <52064730 DOT 50404 AT cornell DOT edu> <"52065B3C DOT 6060104 AT cs DOT utoronto <520CCA41.3000107"@cs.utoronto.ca> <520D089A DOT 1020806 AT cornell DOT edu> <83ioz6op5v DOT fsf AT gnu DOT org> <520D4036 DOT 8010303 AT cs DOT utoronto DOT ca> <520D44B9 DOT 7090206 AT cornell DOT edu> <520D4725 DOT 3030503 AT cs DOT utoronto DOT ca> <520D4F07 DOT 8050007 AT cornell DOT edu> <520D4FF7 DOT 5040405 AT cornell DOT edu> <520D5AA6 DOT 2010003 AT cs DOT utoronto DOT ca> <520D60D3 DOT 3050505 AT cs DOT utoronto DOT ca> <520D6707 DOT 4040902 AT cornell DOT edu>
In-Reply-To:	<520D6707.4040902@cornell.edu>

On 15/08/2013 7:40 PM, Ken Brown wrote:
> On 8/15/2013 7:14 PM, Ryan Johnson wrote:
>> On 15/08/2013 6:48 PM, Ryan Johnson wrote:
>>> On 15/08/2013 6:02 PM, Ken Brown wrote:
>>>> On 8/15/2013 5:58 PM, Ken Brown wrote:
>>>>> On 8/15/2013 5:24 PM, Ryan Johnson wrote:
>>>>>> On 15/08/2013 5:14 PM, Ken Brown wrote:
>>>>>>> On 8/15/2013 4:55 PM, Ryan Johnson wrote:
>>>>>>>> Program received signal SIGSEGV, Segmentation fault.
>>>>>>>> ___chkstk_ms () at
>>>>>>>> /usr/src/debug/gcc-4.8.1-1/libgcc/config/i386/cygwin.S:146
>>>>>>>
>>>>>>> You're not using the latest gcc, which is 4.8.1-3. Any chance that
>>>>>>> that's your problem?
>>>>>> Heh. I actually do have the latest gcc, but somehow the upgrade 
>>>>>> didn't
>>>>>> pick up the debug package (which showed as not installed in
>>>>>> setup.exe).
>>>>>> I have manually upgraded it now.
>>>>>
>>>>> OK.  But doesn't the above show that the crash is occurring in 
>>>>> gcc, not
>>>>> emacs?
>>>>>
>>>>>> BTW, how do you compile emacs from the sources given? I tried
>>>>>> untarring
>>>>>> and patching, but I get the message:
>>>>>>> configure: error: Emacs hasn't been ported to 
>>>>>>> `x86_64-unknown-cygwin'
>>>>>>> systems.
>>>>>>> Check `etc/MACHINES' for recognized configuration names.
>>>>>
>>>>> One of the patches changes configure.ac, so you have to run 
>>>>> autoreconf
>>>>> after applying it.
>>>>
>>>> Or it might be 'autoreconf -I m4'.
>>>
>>> Something is still wrong:
>>>
>>> $ cd /scratch
>>> $ tar xaf /usr/src/emacs-24.3.tar.xz
>>> $ patch -p1 </usr/src/emacs-24.3-5.cygwin.patch
>>> patching file emacs-24.3/CYGWIN-PATCHES/emacs-X11.postinstall
>>> patching file emacs-24.3/CYGWIN-PATCHES/emacs-X11.preremove
>>> patching file emacs-24.3/CYGWIN-PATCHES/emacs-w32.postinstall
>>> patching file emacs-24.3/CYGWIN-PATCHES/emacs-w32.preremove
>>> patching file emacs-24.3/CYGWIN-PATCHES/emacs.postinstall
>>> patching file emacs-24.3/CYGWIN-PATCHES/emacs.preremove
>> Ah, it seems there's a /usr/src/configure.ac.patch that happens to
>> belong to emacs...
>>
>> ... but unfortunately it seems that -fsanitize is only supported on
>> Linux and Darwin right now, so there's little reason to build emacs
>> unless you could use some particular information that a debug build
>> provides. Rats.
>
> But a build without optimization would make your backtraces more useful.
I'm not sure even a perfect stack trace will be very useful if memory 
corruption is the culprit, though. All it will do is give us even 
clearer detail about exactly what got clobbered, but with little 
additional info about what did the clobbering.

That said, I'm game if you have anything in particular you'd like more 
detail on; just let me know what you'd like to see and I'll do my best 
to dig it up. Meanwhile, I'll fire off the debug build.

Ryan


--
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

- Raw text -