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SubjectRe: Anyone working on multi-threaded core files for 2.4 ?
On Fri, Sep 29, 2000 at 01:34:47PM +0100, James Cownie wrote:
>
> I was aiming at the simplest and in my mind most obvious thing, which
> is to have the standard ELF coreer dump handle multiple threads in the
> same way as it does on many other systems. The lack of these causes
> shrieks of amazement from many of our customers :-(
>
> This is not rocket science, and there are already debuggers (gdb, our
> product TotalView, ...) which know how to understand such core dumps
> if only the kernel produced them.
>
> Now that the kernel has mechanisms for finding all the threads in a
> process, the actual dump writing should be relatively simple. (You
> need to write the appropriate register notes for every thread, rather
> than just one).
>
> You seem to be aiming for a much more featureful solution (also
> applicable to checkpointing ?), I'm simply aiming to catch up with
> existing practice on many other operating systems.
>

I have been thinking about adding this for some time. Post mortem
analysis of multi-threaded programs is a Good Thing(tm). I haven't
heard any news on whether anyone has started implementation of the
ideas kicked around on this list with regards to the thread group ID.
It seemed like a good kernel compromise to bring Linux up to speed
with other OSs. I should probably get on the glibc mailing list as
well since there would have to be some changes made there to make
things work properly.


BAPper
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