Re: [Xen-devel] [PATCH] Add tool to attempt to crash HVM guests

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Thu, 29 Jul 2010, Ian Jackson wrote:
> Paul Durrant writes ("[Xen-devel] [PATCH] Add tool to attempt to crash HVM 
> guests"):
> > This tool reads the CPU save records, overwrites RIP with a bogus
> > value, and then restores them. This is, of course, not guaranteed
> > to crash the guest (since the CPUs may not be executing in kernel
> > at the time) but it's good for breaking into some tight loops that
> > would be hard to debug otherwise.
> 
> Surely there must be a better way of doing this!  Isn't it sufficient
> to pause the guest and then inspect it ?  Or do we need a new domctl
> to crash the guest explicitly ?
> 

Explicitly crashing the guest can be very useful for testing, I had to
use this tool myself few times...

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