Re: [Qemu-devel] [RFC] reverse execution.

[Rob Landley]

On 05/17/2013 12:23:51 PM, KONRAD Frédéric wrote:
> On 09/05/2013 19:54, Blue Swirl wrote:
> > On Tue, May 7, 2013 at 6:27 PM, KONRAD Frédéric
> > <address@hidden> wrote:
> > > Hi,
> > >
> > > We are trying to find a way to do reverse execution happen with  
> > > QEMU.
...
> For now we tried some other things which are not working very well,
>
> It appeared that the replay is not deterministic even with icount:

You're aware that reverse execution means you have the "come from"  
problem, right? (The opposite of goto.)

You literally _can't_ figure out your control flow by running the code  
backwards. It's equivalent to solving the halting problem. The best you  
can do is log and replay.

Rob