Date: Mon, 07 May 2012 07:27:22 +0800 From: David Xu <listlog2011@gmail.com> To: bf1783@gmail.com Cc: Steve Wills <swills@freebsd.org>, freebsd-current@freebsd.org, kib@freebsd.org, "b. f." <bf1783@googlemail.com> Subject: Re: ctfmerge core dump Message-ID: <4FA708DA.2010704@gmail.com> In-Reply-To: <CAGFTUwOCGURAHUwa=xYAMj6Yf=MkQ=7cG=gGOJ0tYLqEZMkk3A@mail.gmail.com> References: <CAGFTUwOX1bM1i1a6e1c3AgpV0KCfbc7gbvkdRLq4MwdZ6QnY9A@mail.gmail.com> <4FA58672.1040201@FreeBSD.org> <CAGFTUwOCGURAHUwa=xYAMj6Yf=MkQ=7cG=gGOJ0tYLqEZMkk3A@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On 2012/5/6 5:08, b. f. wrote: > On 5/5/12, Steve Wills<swills@freebsd.org> 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. >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4FA708DA.2010704>