libvirt users - Feb 2012 - want to access the page file of VM from host on Xen platform

Is there a way to access swap memory or page file of a virtual machine from
host. I am using Xen and want to access the page file contents of my windows XP
SP2 virtual machine from dom0. Please do tell me if there is already a tool that
could provide this functionality.

Any help is appreciated.

Thanks and regards,
Irfan
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On 02/09/2012 11:06 AM, Irfan Ahmed wrote:
> Is there a way to access swap memory or page file of a virtual machine from
host. I am using Xen and want to access the page file contents of my windows XP
SP2 virtual machine from dom0. Please do tell me if there is already a tool that
could provide this functionality.
> 
> Any help is appreciated.
libvirt supports the virDomainMemoryPeek operation to look at memory;
and libguestfs provides a very rich set of tools for investigating files
found in a guest's file system.

-- 
Eric Blake   eblake at redhat.com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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[re-adding the list, so others may benefit from the answers]

On 02/09/2012 02:00 PM, Irfan Ahmed wrote:
> thanks Eric.  Just for clarification, if the page is swaped out from RAM to
HDD, will virDomainMemoryPeek functionalso retrive the block of size
'size' from that too or it is only restricted to the pages exist in RAM.
virDomainMemoryPeek is limited to reading what is in the guest's RAM.
As I said earlier, if you are interested in reading what is in the
guest's disk, you might find libguestfs to be a more powerful tool.
> 
> 
> Is there any example program that uses virDomainMemoryPeek function.
Alas, no one has yet wired up virsh to call virDomainMemoryPeek (patches
welcome), and I don't personally have any example programs that use it.
 Rich Jones might have some better ideas (as both author of libguestfs,
and as the implementer of virDomainMemoryPeek).

-- 
Eric Blake   eblake at redhat.com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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