Re: [alliance] [Fwd: [freedows-chat] Re: <important info> The Project,SourceForge, The Future]

[Alexander Kellett <a.kellett@lancaster.ac.uk>]

Ramon van Handel wrote:
> 
> >Still haven't managed to find the bug in shared memory, i've tried
> >various demokernels with different ordering of the tasks and the CK just
> >seems to crash for no reason whatsoever on the current order - don't
> >even get the debugger :(
> 
> In case you're new to hardcore kernel debugging ;) :
just a bit :)

> What I did before I used GDB is "bug cornering".  Place the command:
> 
>    asm( "cli; hlt" );
> 
> Somewhere in the code around where you think it's going wrong.  If it
> hangs before it crashes, you're too early; if it crashes, you're too late.
> Move up the clihlt until you've cornered the exact location of the crash.
> That usually won't necessarily make you find the bug directly, but it'll
> at least give you a place to start...

Thanks!, i haven't done anything like this before :)

> Of course, why won't GDB work ??

I've only got the one machine so i'm using the original debugger, at
least it shows the exception :)
Hopefully i'll be able to get hold of a 486 soon... but then i've got to
find somewhere to put another monitor :(

Alex

-- 
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| Alexander Kellett         __     |  "You're not drunk if you  |
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| "Hmmmmm....Beer"       \ <_. )   |   without holding on."     |
|   - Homer Simpson       `---'    |  - Dean Martin             |
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