Re: [Crash-utility] Crash Setup
----- "ADITYA KRISHNAN" <princeofporsche(a)gmail.com> wrote:
Hi,
Thanks for the help and guidance, I downloaded and ran the latest
version of crash. it gives me the following output:
crash 4.0-7.4
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.
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 "x86_64-unknown-linux-gnu"...(no debugging
symbols found)...
crash: /boot/vmlinux-syms-2.6.16.13-xen: no debugging data available
On running gdb /boot/vmlinux-syms-2.6.16.13-xen i got the following
output:
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 "x86_64-unknown-linux-gnu"...(no debugging
symbols found)...
crash: /boot/vmlinux-syms-2.6.16.13-xen: no debugging data available
GNU gdb Red Hat Linux (6.3.0.0-1.122rh)
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 "x86_64-redhat-linux-gnu"...
(no debugging symbols found)
Using host libthread_db library "/lib64/libthread_db.so.1".
(gdb)
The common point being debug info was not found. But when running
crash it says GDB was configured as "x86_64-unknown-linux-gnu" and
when running only gdb it says GDB was configured as
"x86_64-redhat-linux-gnu"
The lack of debuginfo is the only issue. The "configured as..." message
is irrelevant, as long as the machine type x86_64 is correct.
This may be a stupid question... but am I right in assuming that crash
will now run if I compile xen again with -g option ?
That should be correct. I don't know how your "vmlinux-syms-2.6.16.13-xen"
kernel was built, but it's surprising to me that it's got the "syms"
string
in its name, but was built without -g. But the "(no debugging symbols found)"
message from gdb is proof of that.
When xensource builds their hypervisor binary, it's debuginfo-full version
is called "xen-syms". I would have thought the same would apply to your
vmlinux
kernel, but I don't know what distribution/procedure is responsible for creating
your vmlinux file?
Dave