Messages in this thread | | | Date | Mon, 30 Nov 2009 16:16:50 +0100 | From | Ingo Molnar <> | Subject | Re: [RFC] [PATCH] In-kernel gdbstub based on utrace Infrastructure. |
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* Frank Ch. Eigler <fche@redhat.com> wrote:
> peterz wrote: > > > Hmm,. wouldn't it make much more sense to extend the current kgdb stub > > to include userspace debugging, providing an all-in-one solution? > > I think it would be much more powerful to be able to observe the full > > software stack and not be limited by this user<->kernel barrier. > > There exist other tools for this broad a scope (systemtap being one), > and present gdb is not well suited for this. That makes this idea an > exciting potential for the future, but not a practical short-term > goal.
Well, but Peter's suggestion is the obvious next step - or even a necessary first step in my view.
kgdb exists here and today in the kernel and you cannot just build a facility that doesnt replace it and doesnt integrate well with it.
So if a unified user/kernel model for debugging is a 'long term' feature in your view then perhaps this framework (which introduces _extensive_ hooks all around the kernel) is not designed/approached in the right way and should not be merged in this form.
Concentrating on 'other tools' just generates extensive dependencies on something that is lacking - making it even harder to implement unified debugging down the line.
Thanks,
Ingo
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