[Xen-devel] Debug guest state (VMI)

[Mathieu Tarral <mathieu.tarral@xxxxxxxxxxxxxx>]

Hi !

I'm playing with the VMI APIs using LibVMI, and i need to track down
a bug that i reported here:
https://github.com/libvmi/libvmi/issues/621

Basically the domain is still paused even thought i called the right API
to resume it and the event buffer is supposed to be empty.

Now there are 2 possibilities
- either there is an event in the buffer waiting to be processed
- or the resume_vm function failed

Is there a way to track the state of the guest VMI event buffer ?
(what events are registered)

Is there a way to see the pause/resume operations in a guest log file ?

I found some documentation on:
https://wiki.xenproject.org/wiki/Reporting_Bugs_against_Xen_Project

using XENCONSOLED_TRACE=guest
to put in /etc/default/xencommons

However, i don't have a service named xenconsoled.service
running on my environment ??

-> Is there a general page on the Wiki which explains where are the log
file and how to debug the guests and dom0 ?

I'm using Xen 4.9.2 on Ubuntu Bionic.

Thanks for your help !

​--

Mathieu Tarral
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