[Xen-devel] Re: about kdb for Xen

[Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>]

Liu Jian wrote:
> On Fri, Mar 27, 2009 at 10:50 AM, Mukesh Rathor
> <mukesh.rathor@xxxxxxxxxx> wrote:
> > I think I'm not following you. If you enter go first time, the system is
> > crashing. You are hitting an assert (BUG()) in the hypervisor. The
> > victim is accpting input as you are able to type the second "go" when
> > it's says cmd not avail in crash state.
> >
> > After the crash, you can use dr, f, dw, etc... all those commands but
> > not the "go" cmd.
> Yes, "df, f, dw" works well. But the second "go" not and it show as following:
>
> [1]xkdb> go
> cmd not available in fatal/crashed state......
>
> Of course, now target victim cannot accept any input.
You are saying you don't get kdb prompt back now?

> > 1. what version of xen are you using?
> All the code is cloned from your branch as following:
>
> [root@localhost ~]hg clone http://xenbits.xensource.com/ext/debuggers.hg
>
> In the compile process as following, It show the version is "3.4-unstable"
>
> > 2. Are you compiling hyp with -DEBUG?
> I just compile xen by:
>
> [root@localhost xen>make kdb=y
>
> Do you mean I need other parameters?
The problem is debug is turned on. kdb is not currently supported with
debug on, as I had said before. Do > make kdb=y debug=n
I also suggest frame_pointer=y to get reliable stacks.

Mukesh

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