root@mds0:~# stat /core
  File: `/core'
  Size: 433049600 	Blocks: 468440     IO Block: 4096   regular file
Device: 801h/2049d	Inode: 481         Links: 1
Access: (0600/-rw-------)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2010-06-03 14:06:34.692137516 +0200
Modify: 2010-06-03 14:04:41.422137516 +0200
Change: 2010-06-03 14:04:41.422137516 +0200
root@mds0:~# 

root@mds0:~# gdb /usr/lib/debug/usr/bin/cmds /core
GNU gdb (GDB) 7.1-ubuntu
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/lib/debug/usr/bin/cmds...done.
[New Thread 10806]
[New Thread 10807]
[New Thread 10808]
[New Thread 10814]
[New Thread 10817]
[New Thread 10953]
[New Thread 10954]
[New Thread 10803]
[New Thread 10801]
[New Thread 10818]
[New Thread 10964]
[New Thread 10902]
[New Thread 10963]
[New Thread 10948]
[New Thread 10949]
[New Thread 10958]
[New Thread 10950]
[New Thread 10951]
[New Thread 10957]
[New Thread 10955]
[New Thread 10956]

warning: Unable to find dynamic linker breakpoint function.
GDB will be unable to debug shared library initializers
and track explicitly loaded dynamic code.
Core was generated by `/usr/bin/cmds -i 0 -c /etc/ceph/ceph.conf'.
Program terminated with signal 6, Aborted.
#0  0x00007fa797f14a75 in ?? ()
(gdb) bt
#0  0x00007fa797f14a75 in ?? ()
#1  0x00007fa797f185c0 in ?? ()
#2  0x00000000006e59cb in ?? ()
#3  0x00007fa7980283cf in ?? ()
#4  0x00007fa7972c2d70 in ?? ()
#5  0x0000000000000077 in ?? ()
#6  0x00007fa7972c2e60 in ?? ()
#7  0x00007fa797f480e6 in ?? ()
#8  0x0000003000000018 in ?? ()
#9  0x00007fa7972c2e70 in ?? ()
#10 0x00007fa7972c2d90 in ?? ()
#11 0x00007fa797f316f8 in ?? ()
#12 0x0000003000000030 in ?? ()
#13 0x00007fa7972c2e88 in ?? ()
#14 0x00007fa77457ffe0 in ?? ()
#15 0x2027296469742874 in ?? ()
#16 0x00007fa7745bd410 in ?? ()
#17 0x206e6f6974726573 in ?? ()
#18 0x00007fff6b0449a7 in ?? ()
#19 0x00007fa79802647a in ?? ()
#20 0x00000000006e58c6 in ?? ()
#21 0x0000000000000077 in ?? ()
#22 0x0000000000000020 in ?? ()
#23 0x0000000000000000 in ?? ()
(gdb)