Re: Error message from makedumpfile

[Neil Horman <nhorman@xxxxxxxxxxxxx>]

On Fri, Jun 29, 2007 at 05:19:10PM +0530, Shan wrote:
> Hi,
> 
> I wanted to test makedumpfile utility in my system and installed
> makedumpfile-1.1.4-3.x86_64.rpm (distribution Open SuSE).
> The makedumpfile version is
>         makedumpfile: version 1.1.4 (released on 08 June 2007)
> 
> First I moved to the dump directory (as root) and executed the command
> 
>       > makedumpfile -c -d 31 -x
> /boot/vmlinux-2.6.16.21-0.8.uis.1-smpvmcore test_vmcoe
> 
> I got the following error message
>            get_debug_info: Can't create a handle for a new debug session.
> 
>            makedumpfile Failed.
> 
> I looked into makedumpfile.c file and found the following part of the code
> in function get_debug_info() throws the error message.
> 
>         if (!(dwarfd = dwarf_begin_elf(elfd, DWARF_C_READ, NULL))) {
>                ERRMSG("Can't create a handle for a new debug session.\n");
>                goto out;
>        }
> 
> I also tried to look into the function dwarf_begin_elf function found in the
> following link
> 
> http://www.koders.com/c/fid3470AEB14EE81F5C819D1D4AB40324F0E59E4556.aspx
> 
> But could not understand much.
> 
> Could anybody assist me to get the proper result?
> 
> Thanks,

you need to install the debug version of the kernel that you are interested in.
if can be found in the corresponding kernel-debuginfo package for the kernel you
are interested in, as /usr/lib/debug/lib/modules/<version>/vmlinux

Regards
Neil

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 *Neil Horman
 *Software Engineer
 *Red Hat, Inc.
 *nhorman@xxxxxxxxxxxxx
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