From owner-freebsd-questions@FreeBSD.ORG Fri Mar 14 23:56:25 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 03D711065671 for ; Fri, 14 Mar 2008 23:56:25 +0000 (UTC) (envelope-from bc979@lafn.org) Received: from zoot.lafn.org (zoot.lafn.ORG [206.117.18.6]) by mx1.freebsd.org (Postfix) with ESMTP id CDD728FC1D for ; Fri, 14 Mar 2008 23:56:24 +0000 (UTC) (envelope-from bc979@lafn.org) Received: from [10.0.1.2] (pool-71-116-247-93.lsanca.dsl-w.verizon.net [71.116.247.93]) (authenticated bits=0) by zoot.lafn.org (8.13.6/8.13.4) with ESMTP id m2ENuHFR093254 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NO); Fri, 14 Mar 2008 16:56:18 -0700 (PDT) (envelope-from bc979@lafn.org) Message-Id: <511EC772-36FD-4799-B4A1-3AE690B6D048@lafn.org> From: Doug Hardie To: Derek Ragona In-Reply-To: <6.0.0.22.2.20080314171533.023f7c88@mail.computinginnovations.com> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Apple Message framework v919.2) Date: Fri, 14 Mar 2008 16:56:18 -0700 References: <6.0.0.22.2.20080314171533.023f7c88@mail.computinginnovations.com> X-Mailer: Apple Mail (2.919.2) X-Virus-Scanned: ClamAV 0.88.7/6236/Fri Mar 14 15:39:27 2008 on zoot.lafn.org X-Virus-Status: Clean Cc: freebsd-questions Subject: Re: C compiler issue perhaps? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 14 Mar 2008 23:56:25 -0000 There is no code running at that point. Its just sitting there waiting for me to enter a gdb command. On Mar 14, 2008, at 15:16, Derek Ragona wrote: > At 05:10 PM 3/14/2008, Doug Hardie wrote: >> I have a program I was testing with gdb. I was trying to figure out >> why c.rmonths was always zero when it should have been 6. Stepped >> through using the gdb n command. Here is the output: >> >> (gdb) >> 215 c.rmonths = (edate - tdate) / >> toMONTHS; >> (gdb) >> 223 c.dial_in = u.dial_in[0]; >> (gdb) >> 224 c.dsl = u.dsl[0]; >> (gdb) p c.rmonths >> $1 = 0 >> (gdb) p c >> $2 = {fa = 0, pwp = 0, disp_email = 0, imonths = 0, rmonths = 6, >> type = 73 'I', cd = 0 '\0', dial_in = 82 'R', dsl = 0 '\0', >> dsl_kit = 0 '\0', ip = 0 '\0', domain = 0 '\0', n_domain = 0 '\0', >> renewal = 89 'Y', program = "I\000\000"} >> (gdb) p c->rmonths >> $3 = 6 >> (gdb) p c.rmonths >> $4 = 6 >> >> >> Notice, the first time i print it its zero. The second time its 6. >> What gives here? I have seen this before but couldn't pin it down. >> The program is not compiled with any optimization. It is in a shared >> library though. > > It is hard to tell without the code you used. I would put some > printf's in the code and see what and when that variable gets set to > in actual running code. > > -Derek > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean.