[Crash-utility] Using crash to debug a domU on xen.

[Daniel Kiper]

On Tue, Oct 22, 2013 at 07:03:19PM +0200, Daniel Kiper wrote:
> Hi,
>
> Sorry for late reply but I am very busy now.
>
> On Thu, Oct 17, 2013 at 03:25:25PM -0400, Don Slutz wrote:
> > On 10/16/13 09:49, Petr Tesarik wrote:
> > >On Tue, 15 Oct 2013 12:02:51 -0400
> > >Don Slutz <dslutz at verizon.com> wrote:
> > >
> > >>I have some code that allows this.  See the following mail thread:
> > >>
> > >>http://permalink.gmane.org/gmane.comp.emulators.xen.devel/174807
> > >>
> > >>The questions are:
> > >>
> > >>  1. Does remote access have a specification?
> > >>  2. Is it supported?
> > >I have never even made it to work. But since there's now some new use
> > >for it, I wouldn't object reviving the code.
> > >
> > Good.
> > >>  3. Should the code be part of xen or crash?
> > >I think it should be part of xen, because it needs the xen development
> > >files, which would be a new dependency for the crash utility. Also, the
> > >development cycle is more aligned with xen than crash.
> > >
> > >Just my two cents,
> > >Petr T
> > That is why I started with it in xen.  Not sure where it will end up.
>
> I do not know protocol details but I think that it is worth checking
> gdbsx tool from Xen (xen/tools/debugger/gdbsx) and gdb protocol spec
> (you could expose GDB interface from QEMU so it could be useful in HVM
> case). Maybe crash protocol is very similar or even identical with GDB
> protocol because a large part of crash is GDB itself.

Ugh... I was in a hurry and forgot about final statement. Sorry for that.

So we could just use existing solutions if they are compatible with
protocol used by crash.

Daniel