From owner-freebsd-questions@FreeBSD.ORG Sun Jun 30 16:58:16 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id A1014160 for ; Sun, 30 Jun 2013 16:58:16 +0000 (UTC) (envelope-from bsam@passap.ru) Received: from forward1l.mail.yandex.net (forward1l.mail.yandex.net [IPv6:2a02:6b8:0:1819::1]) by mx1.freebsd.org (Postfix) with ESMTP id 66E0D1465 for ; Sun, 30 Jun 2013 16:58:16 +0000 (UTC) Received: from smtp14.mail.yandex.net (smtp14.mail.yandex.net [95.108.131.192]) by forward1l.mail.yandex.net (Yandex) with ESMTP id D8CE11520D00; Sun, 30 Jun 2013 20:58:14 +0400 (MSK) Received: from smtp14.mail.yandex.net (localhost [127.0.0.1]) by smtp14.mail.yandex.net (Yandex) with ESMTP id 8303E1B604BB; Sun, 30 Jun 2013 20:58:14 +0400 (MSK) Received: from 93.91.10.62.tel.ru (93.91.10.62.tel.ru [93.91.10.62]) by smtp14.mail.yandex.net (nwsmtp/Yandex) with ESMTP id 6ARGnCvVrK-wEfWbGBj; Sun, 30 Jun 2013 20:58:14 +0400 Message-ID: <51D063A6.8030908@passap.ru> Date: Sun, 30 Jun 2013 20:58:14 +0400 From: Boris Samorodov Organization: =?UTF-8?B?0JfQkNCeICLQktCQ0KDQoiI=?= User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:17.0) Gecko/20130621 Thunderbird/17.0.6 MIME-Version: 1.0 To: =?UTF-8?B?RmVybmFuZG8gQXBlc3RlZ3XDrWE=?= Subject: Re: Debugging a crash References: <51D05099.8060001@passap.ru> In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: "freebsd-questions@freebsd.org" X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 30 Jun 2013 16:58:16 -0000 30.06.2013 19:53, Fernando Apesteguía пишет: > On Sun, Jun 30, 2013 at 5:36 PM, Boris Samorodov wrote: > >> Hi All, >> >> I get an application crashing. Build some libs with debug symbols. >> Here is the gdb log: >> ----- >> Program received signal SIGSEGV, Segmentation fault. >> [Switching to Thread 809806400 (LWP 101133/photoprint)] >> strtol_l (nptr=0x0, endptr=0x0, base=10, locale=) >> at /usr/src/lib/libc/stdlib/strtol.c:73 >> 73 } while (isspace_l((unsigned char)c, locale)); >> Current language: auto; currently minimal >> (gdb) bt >> #0 strtol_l (nptr=0x0, endptr=0x0, base=10, locale= > ^^^^ > It seems you are passing a NULL str to strtol. OK. So how to proceed in debugging it? >> out>) at /usr/src/lib/libc/stdlib/strtol.c:73 >> #1 0x00000008017d951c in ps_parameters (v=0x809d0dc00, name=0x80996c120 >> "JCLBOXHOLDTYPE", description=0x7fffffffd0a8) at print-ps.c:380 >> #2 0x00000008017996df in stp_describe_parameter (v=0x809d0dc00, >> name=0x80996c120 "JCLBOXHOLDTYPE", description=0x7fffffffd0a8) at >> print-vars.c:1687 >> #3 0x000000000046cfd2 in ?? () >> #4 0x00000000004627a1 in ?? () >> #5 0x0000000000461da4 in ?? () >> #6 0x00000000004657fe in ?? () >> #7 0x0000000000422863 in ?? () >> #8 0x0000000000421f45 in ?? () >> #9 0x000000000041054f in ?? () >> #10 0x0000000800719000 in ?? () >> #11 0x0000000000000000 in ?? () >> (gdb) fr 0 >> #0 strtol_l (nptr=0x0, endptr=0x0, base=10, locale=> out>) at /usr/src/lib/libc/stdlib/strtol.c:73 >> 73 } while (isspace_l((unsigned char)c, locale)); >> (gdb) fr 1 >> #1 0x00000008017d951c in ps_parameters (v=0x809d0dc00, name=0x80996c120 >> "JCLBOXHOLDTYPE", description=0x7fffffffd0a8) at print-ps.c:380 >> 380 num_choices = atoi(stp_mxmlElementGetAttr(option, >> "num_choices")); >> (gdb) fr 2 >> #2 0x00000008017996df in stp_describe_parameter (v=0x809d0dc00, >> name=0x80996c120 "JCLBOXHOLDTYPE", description=0x7fffffffd0a8) at >> print-vars.c:1687 >> 1687 stp_printer_describe_parameter(v, name, description); >> (gdb) >> ----- >> >> How should I proceed with debugging? Thanks! -- WBR, Boris Samorodov (bsam) FreeBSD Committer, http://www.FreeBSD.org The Power To Serve