Re: [Xen-devel] anybody using pdb?

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

> > 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).
> 
>    christian
> 

Okay, I checked in a fix somewhat like the one you initially
proposed. Fancy giving it another spin? :-)

 -- Keir


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