X-Recipient:	archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status:	No, hits=-2.5 required=5.0 tests=AWL,BAYES_00,SPF_PASS
X-Spam-Check-By:	sourceware.org
Message-ID:	<4B161962.3090108@gmail.com>
Date:	Wed, 02 Dec 2009 07:38:10 +0000
From:	Dave Korn <dave DOT korn DOT cygwin AT googlemail DOT com>
User-Agent:	Thunderbird 2.0.0.17 (Windows/20080914)
MIME-Version:	1.0
To:	cygwin AT cygwin DOT com
Subject:	Re: odd segfault with my c program using cygwin 1.7
References:	<20071202162155 DOT XNVY20104 DOT mta10 DOT adelphia DOT net AT dual-xeon DOT weasel DOT com> <20091202013344138 DOT XZWP20286 AT cdptpa-omta02 DOT mail DOT rr DOT com> <416096c60912012235h2e5290c3q4ad720134d4f0422 AT mail DOT gmail DOT com>
In-Reply-To:	<416096c60912012235h2e5290c3q4ad720134d4f0422@mail.gmail.com>
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

Andy Koppe wrote:
> 2009/12/2 jeffunit:
>> My program ran fine under cygwin 1.5 as well as many versions of linux
>> including
>> mandriva 2009, mandriva 2009.1 and mandriva 2010.0
>>
>> When compiled with
>> gcc cal.c -o cal
>> and run with
>> cal 2009
>> I get a segmentation fault.
>> When I uncomment line 62, the program runs successfully.
> 
> It's the line after that that has the bug: it's writing to index 432
> of a 432-element array.

  Doesn't look like it does to me:

>         for(j=0; j<6*72; j++) {
> 	    //printf("joe %d\n", j);
> 	    string[j] = '\0';
> 	}

  That's less than 432, not less than or equal.

  It ran to completion on my machine without a problem.  I tried it without
any -O option, and at -O{0,2,3} without any problem.  I ran it under gdb and
set a watchpoint on string[432] and it ran without tripping.  So I don't know
what's going wrong for OP.

    cheers,
      DaveK

--
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 -