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

[mgross]

On Thursday 17 October 2002 11:55 pm, Daniel Jacobowitz wrote:
> 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.

Sounds like fun ;)  Making it generic and extencible will be a challenge,  
for both GDB and the Linux kernel.

--mgross