[Crash-utility] crashdc: problem when running crash in kexec environment for SLES11

[Bernhard Walle]

Hi again,

Louis Bouchard schrieb:
> 
>> crash 4.0-7.6
>> Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008  Red Hat, Inc.
>> Copyright (C) 2004, 2005, 2006  IBM Corporation
>> Copyright (C) 1999-2006  Hewlett-Packard Co
>> Copyright (C) 2005, 2006  Fujitsu Limited
>> Copyright (C) 2006, 2007  VA Linux Systems Japan K.K.
>> Copyright (C) 2005  NEC Corporation
>> Copyright (C) 1999, 2002, 2007  Silicon Graphics, Inc.
>> Copyright (C) 1999, 2000, 2001, 2002  Mission Critical Linux, Inc.
>> This program 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.  Enter "help copying" to see the conditions.
>> This program has absolutely no warranty.  Enter "help warranty" for details.
> 
>> NOTE: stdin: not a tty
> 
>> cannot determine relocation value: not a live system
>> gdb /root/usr/lib/debug/boot/vmlinux-2.6.27.23-0.1-default.debug 
> 
> 
>> dlopen failed on 'libthread_db.so.1' - libthread_db.so.1: cannot open shared object file: No such file or directory
>> GDB will not be able to debug pthreads.
> 
>> GNU gdb 6.1
>> 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 "i686-pc-linux-gnu".../usr/bin/crashdc: line 160:   682 Killed                  $crashexe -d $crashdebug $namelist $debuginfofile $vmcorefile < $crashcmd
>> File /root/var/crash/2009-09-29-17:45/crash-data-200909291746.txt has been generated
>> generated a crash-data file to /root/var/crash/2009-09-29-17:45
>> ..done
>> Restarting system.
> 
> My feeling is that the "dlopen failed on 'libthread_db.so.1'" might be
> causing this.

I don't think so. I just tried to reproduce the problem here with
openSUSE 11.1 (I have no SLES). In my case, I also got the "killed", but
it was too less memory. I changed the reservation to be 256 MiB for the
crashkernel, and now it works.

I did in the shell I got in the kexec environment:

 % ln -s root/boot/vmlinux-2.6.27.7-9-pae .
 % ln -s root/usr/lib/debug/boot/vmlinux-2.6.27.7-9-pae.debug .
 % echo bt > cmdlist
 % root/usr/bin/crash vmlinux-2.6.27.7-9-pae /proc/vmcore -i cmdlist

With this, I got a backtrace. I also get the libthread_db warning, but
it was harmless.

BTW: Did you try to set LD_LIBRARY_PATH? Maybe it's necessary so that
dlopen() finds the lib. But I didn't investigate ...


HTH.




Regards,
Bernhard