[Crash-utility] given a makedumpfile processed coredump, generate a symbolic backtrace containing the same info as a standard gdb backtrace

[Dave Anderson]

----- Original Message -----
> Crash's bt command doesn't provide function arguments/types as part of the
> backtrace (use bt not gdb's bt). There's an extension module here that may
> provide what you want:
> 
> http://people.redhat.com/anderson/extensions.html#FP
> 
> There a lot of history on the mailing list about wanting to use gdb's bt
> command if you want to have a read of it.

You got that right -- this post points to several earlier threads:

 Re: [Crash-utility] Getting access to function parameters
 https://www.redhat.com/archives/crash-utility/2012-December/msg00029.html

Dave

> 
> 
> -----Original Message-----
> From: crash-utility-bounces at redhat.com
> [mailto:crash-utility-bounces at redhat.com] On Behalf Of Cody P Schafer
> Sent: Tuesday, September 10, 2013 9:07 AM
> To: crash-utility at redhat.com; kexec at lists.infradead.org
> Subject: [Crash-utility] given a makedumpfile processed coredump, generate a
> symbolic backtrace containing the same info as a standard gdb backtrace
> 
> 
> Hi all,
> 
> I've got a coredump file processed by makedumpfile (non-elf) and am trying to
> get a backtrace with all the line numbers, argument values, and argument
> types like a normal gdb backtrace with debug info (yes, I have a vmlinux
> built with debuginfo).
> 
> gdb refuses to load the core dump (no big supprise there). crash loads it but
> it's builtin backtrace doesn't appear to use debug info, and as a result
> doesn't give me arguments + types. Doing "gdb bt" complains about not having
> a stack.
> 
> Any advise? I see a few paths forward:
> 
>   - somehow get crash's gdb to understand where the stack is
>   - hack gdb to load the non-elf coredump
>   - modify makedumpfile to allow it to convert the non-elf coredump back to
>   elf.
> 
> Thanks.
> 
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