[Qemu-devel] qemu gdbstub

[Qemu-devel] qemu gdbstub

[Andi Kleen]

Hi,

The new qemu gdbstub in recent qemus/kvms is really nice and a
big improvement over earlier ones. Thank you.

I'm using qemu-kvm-0.10.6 on the plain Linux 2.6.30 KVM on VT.

One problem I noticed is that I cannot step on another CPU thread
than where it stopped.

e.g.

Ctrl-C
(stopping on thread 1)
(gdb) thread 2
(gdb) step
...
I come back to thread 1 after the step

On native gdb with multiple threads that seems to work.

-Andi

[Qemu-devel] Re: qemu gdbstub

[Jan Kiszka]

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Andi Kleen wrote:
> Hi,
> 
> The new qemu gdbstub in recent qemus/kvms is really nice and a
> big improvement over earlier ones. Thank you.
> 
> I'm using qemu-kvm-0.10.6 on the plain Linux 2.6.30 KVM on VT.
> 
> One problem I noticed is that I cannot step on another CPU thread
> than where it stopped.
> 
> e.g.
> 
> Ctrl-C
> (stopping on thread 1)
> (gdb) thread 2
> (gdb) step
> ...
> I come back to thread 1 after the step
> 
> On native gdb with multiple threads that seems to work.

You need vCont support in the gdbstub, and this feature is now finally
merged into 0.11. So qemu-kvm-0.11-rcX should be what you want.

Jan


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