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xen-devel
Re: [Xen-devel] anybody using pdb?
> > I've fixed this a better way, by enabling interrupts before calling
> > the pdb handler. Let me know if it still doesn't work.
>
> No it doesn't work, at least not for the "jump to the debugger by pressing
> D" case. Maybe because you only enabled interrupts during traps but not
> during interrupts? AFAICT there's also some locking/flag setting which
> might prevent further interrupts while the handler is still running (if I'm
> looking at the right code, do_IRQ in xen/arch/i386/irq.c).
>
> I considered enabling interrupts at first but I couldn't exclude re-entrance
> issues. Also I think that it's not the right thing to do in this case: if
> you're using the debugger on Xen, you don't want interrupts enabled. I
> think you'd actually want them explicitly disabled (as opposed to the
> previous/current implicit disabling).
Hmmmm... maybe you're right. :-)
Certainly I've changed my mind about yesterday's fix. I'll back it out
and do something along the lines of what you posted in the first
place.
-- Keir
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