From owner-freebsd-current@FreeBSD.ORG Tue Apr 13 05:53:52 2010 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E5E361065670 for ; Tue, 13 Apr 2010 05:53:52 +0000 (UTC) (envelope-from hizel@vyborg.ru) Received: from mail.vyborg.ru (mail.vyborg.ru [195.177.105.12]) by mx1.freebsd.org (Postfix) with ESMTP id 52F958FC13 for ; Tue, 13 Apr 2010 05:53:51 +0000 (UTC) Received: from hzwork.vyborg.ru (o.vyborg.ru [195.177.104.22]) by mail.vyborg.ru (8.14.3/8.14.3) with ESMTP id o3D5tCt7067643 for ; Tue, 13 Apr 2010 09:55:12 +0400 (MSD) (envelope-from hizel@vyborg.ru) Date: Tue, 13 Apr 2010 09:53:50 +0400 From: Hizel Ildar To: freebsd-current@freebsd.org Message-ID: <20100413095350.3e74bb85@hzwork.vyborg.ru> In-Reply-To: <20100411001454.GO73901@bunrab.catwhisker.org> References: <20100411001454.GO73901@bunrab.catwhisker.org> X-Mailer: Claws Mail 3.7.5 (GTK+ 2.20.0; i486-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: Re: SIGSEGV in dc, at bcode.c:277 (function reset_bmachine()) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Apr 2010 05:53:53 -0000 =D0=92 Sat, 10 Apr 2010 17:14:54 -0700 David Wolfskill =D0=BF=D0=B8=D1=88=D0=B5=D1=82: > As these things go, this probably isn't as critical as most thinsg > disussed on this list, but I happened to notice it today, built a > debugging world and at least cornered the annoying little varmint. >=20 > Sorry; no patch at this time. :-( >=20 > Here's how to reproduce it: while running CURRENT, invoke dc(1) > using the command-line expression-soecification ("-e ..."), thus: >=20 > freebeast(9.0-C)[2] dc -e "6 2/p" > Segmentation fault (core dumped) > freebeast(9.0-C)[3]=20 >=20 > This was running: >=20 > FreeBSD freebeast.catwhisker.org 9.0-CURRENT FreeBSD 9.0-CURRENT #1 > r206447: Sat Apr 10 14:49:56 PDT 2010 > root@freebeast.catwhisker.org:/common/S1/obj/usr/src/sys/GENERIC i386 >=20 Also, when using the option -f file must be core dump :( foo# echo '6 2/p' > /tmp/test foo# dc -f /tmp/test Segmentation fault (core dumped) foo# gdb /usr/bin/dc dc.core=20 GNU gdb 6.1.1 [FreeBSD] Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain condition= s. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-marcel-freebsd"... Core was generated by `dc'. Program terminated with signal 11, Segmentation fault. Reading symbols from /lib/libcrypto.so.6...done. Loaded symbols for /lib/libcrypto.so.6 Reading symbols from /lib/libc.so.7...done. Loaded symbols for /lib/libc.so.7 Reading symbols from /libexec/ld-elf.so.1...done. Loaded symbols for /libexec/ld-elf.so.1 #0 0x08049818 in reset_bmachine (src=3D0x804fc48) at /usr/src/usr.bin/dc/b= code.c:277 277 bmachine.readstack[0] =3D *src; (gdb) bt #0 0x08049818 in reset_bmachine (src=3D0x804fc48) at /usr/src/usr.bin/dc/b= code.c:277 #1 0x0804947e in procfile (fname=3D0xbfbfea22 "/tmp/test") at /usr/src/usr= .bin/dc/dc.c:75 #2 0x0804951f in main (argc=3D3, argv=3D0xbfbfe8fc) at /usr/src/usr.bin/dc= /dc.c:96 (gdb) quit foo# uname -a FreeBSD foo.vyborg.ru 9.0-CURRENT FreeBSD 9.0-CURRENT #1: Sun Apr 11 21:00:= 05 MSD 2010 root@foo.vyborg.ru:/usr/obj/usr/src/sys/GENERIC i386