Re: [patch] thread-aware coredumps, 2.5.43-C3

[Daniel Jacobowitz <dan@debian.org>]

On Thu, Oct 17, 2002 at 07:58:23PM -0700, Mark Gross wrote:
> On Thursday 17 October 2002 07:12 pm, Andi Kleen wrote:
> > I want the x86 CPU error code, which often has interesting clues on the
> > problem. trapno would be useful too. I suspect other CPUs have similar
> > extended state for exceptions.
> >
> > I usually hack my kernel to printk() it, but having it in the coredump
> > would be more general and you can look at it later.
> >
> > Eventually (in a future kernel) I would love to have the exception
> > handler save the last branch debugging registers of the CPU and the let the
> > core dumper put that into the dump too.  Then you could easily
> > figure out what the program did shortly before the crash.
> >
> > -Andi
> 
> Having the last branch before a crash would be cool.  Its easy to add note 
> sections to core files.  If it turns out to be useful I'm sure the GDB folks 
> would support it. 

Absolutely.  The GDB side would be pretty easy.

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer