Re: Oops assist... [Solution + Patch]

Philip Gladstone (philip@raptor.com)
Thu, 06 May 1999 11:44:38 -0400

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Manfred Spraul wrote:
>
> Philip Gladstone wrote:
> > I'll bet that having 220 bytes of Oops is a lot better
> > than nothing - note that you only want to save the
> > binary data, not the text.
>
> I thought about extending the current Oops report:
> * include the complete stack dump, including current
> (i.e. 8 kB on i386, 16 kB otherwise)
> ---> ability to reconstruct all local variables, in
> the complete call chain.
> ability to find buffer overruns on stack etc.
> * test all registers if they point to valid memory,
> and dump a few hundert bytes if the memory
> is valid.
> --> ability to analyze the structure where the bad
> pointer came from.
>
> The overall dump would be 10-40 kB binary data.
> I know that this would be overkill for most oops'es,
> but disk space is cheap, and ksymoops could throw
> away most data unless e.g '--realy-verbose' is set.

I agree that it would be nice. If you have a modern motherboard,
then you can probably hide 64kb (or more) in the memory hidden
by the VGA card. (check your /proc/pci for one of 82437, 82441, 82443)

I looked at trying to write the dump to disk, but that looked
dangerous (and difficult!).

Philip

-- 
Philip Gladstone                           +1 781 530 2461
Axent Technologies, Waltham, MA
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