From owner-freebsd-current@FreeBSD.ORG Sun May 6 23:27:26 2012 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 4D9A0106566C; Sun, 6 May 2012 23:27:26 +0000 (UTC) (envelope-from listlog2011@gmail.com) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 3505B8FC17; Sun, 6 May 2012 23:27:26 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.5/8.14.5) with ESMTP id q46NROmk082070; Sun, 6 May 2012 23:27:24 GMT (envelope-from listlog2011@gmail.com) Message-ID: <4FA708DA.2010704@gmail.com> Date: Mon, 07 May 2012 07:27:22 +0800 From: David Xu User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:12.0) Gecko/20120428 Thunderbird/12.0.1 MIME-Version: 1.0 To: bf1783@gmail.com References: <4FA58672.1040201@FreeBSD.org> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Steve Wills , freebsd-current@freebsd.org, kib@freebsd.org, "b. f." Subject: Re: ctfmerge core dump X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: davidxu@freebsd.org List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 06 May 2012 23:27:26 -0000 On 2012/5/6 5:08, b. f. wrote: > On 5/5/12, Steve Wills wrote: >> On 05/05/12 15:43, b. f. wrote: >>> Steve Wills wrote: >>>> After updating from -CURRENT as of April 5 to one built today, I now get >>>> a core dump running ctfmerge on libc: >>>> >>>> ctfmerge -L VERSION -g -o libc.so.7 syscall.So fork.So...... >>>> Bus error (core dumped) >>>> *** [libc.so.7] Error code 138 >>>> >>>> Anyone else seeing this or have any idea how to avoid it? >>> Yes, I'm also seeing such problems when attempting to build a r235052 >>> amd64 kernel on r235035 amd64. (This problem did not occur when >>> building a r235035 amd64 world and kernel on r234854 amd64.) ctfmerge >>> succeeds for several kernel modules but fails with kgssapi.ko.debug, >>> linux.ko.debug, or kernel.debug. I'm not yet sure which change has >>> caused this, or how to avoid it. >>> >> Thanks for the info. I took a look at the dump and see this: >> >> % sudo gdb /usr/bin/ctfmerge ctfmerge.core >> [GDB will not be able to debug user-mode threads: Undefined symbol >> "td_thr_getxmmregs"] Hmm, is the thread debugging broken on amd64 now ? td_thr_getxmmregs resides in libthread_db and /usr/src/gnu/usr.bin/gdb/libgdb is complaining about the missing symbol. >> 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 >> conditions. >> Type "show copying" to see the conditions. >> There is absolutely no warranty for GDB. Type "show warranty" for details. >> This GDB was configured as "amd64-marcel-freebsd"... >> Core was generated by `ctfmerge'. >> Program terminated with signal 10, Bus error. >> Reading symbols from /lib/libctf.so.2...done. >> Loaded symbols for /lib/libctf.so.2 >> Reading symbols from /usr/lib/libdwarf.so.3...done. >> Loaded symbols for /usr/lib/libdwarf.so.3 >> Reading symbols from /usr/lib/libelf.so.1...done. >> Loaded symbols for /usr/lib/libelf.so.1 >> Reading symbols from /lib/libz.so.6...done. >> Loaded symbols for /lib/libz.so.6 >> Reading symbols from /lib/libthr.so.3...done. >> Loaded symbols for /lib/libthr.so.3 >> 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 0x00000000004064b0 in fifo_len (f=0x801c29070) at >> /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/fifo.c:128 >> 128 for (i = 0, fn = f->f_head; fn; fn = fn->fn_next, i++); >> (gdb) bt >> #0 0x00000000004064b0 in fifo_len (f=0x801c29070) at >> /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/fifo.c:128 >> #1 0x000000000040622c in worker_thread (wq=0x610ee0) at >> /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/ctfmerge.c:329 >> #2 0x0000000801078da9 in thread_start (curthread=0x801c0f800) at >> /usr/src/lib/libthr/thread/thr_create.c:284 >> #3 0x0000000000000000 in ?? () >> Cannot access memory at address 0x7fffff5fb000 >> (gdb) >> > After reverting the recent libthr changes in r234947, I am no longer > encountering this problem. > > b. >