Hello Craig

I have read and try your explanation about Squeak2.7.
But by putting a "self halt" in the method lookupupMethodInclass nothing happened. 
What are the tool offered for debugging/modifying the interpreted VM?

Do you know is there some significant change from Squeak2.7 and the last VM?

I have also tried to make the simulator running in squeak 3.4 (using Anthonny Hannan change set) but I get an error "UndefinedObject not indexable". Do I need to recompile the VM excluding plugins (the error arise in the method InterpreterSimulator>>loadNewPlugin:) ? Do I need other changeset than the one from Anthonny ?

Regards
Alexandre

On Wed, Mar 26, 2003 at 11:53:20PM -0800, Craig Latta wrote:
> 
> Hi Stephane--
> 
> > Now my question what can we really do with the Interpreter. I
> > thought that it was used to develop the Squeak VM (debugging it...)
> > is it correct?
> 
> 	Yes!
> 
> > what are the limits of the approach (can we access the VM internal
> > structure...?)
> 
> 	You can indeed access the VM internal structure. The main limit of the
> approach is speed. :)  And because of that there are some obvious timing
> problems when debugging certain things like media processing. But on
> contemporary machines (>= 1GHz) a simulated interpreter session is quite
> usable. :)
> 
> > Does somebody have a version running in 3.4...
> 
> 	I do.
> 
> > because it seems to me that this is key asset of Squeak for exploring new ideas?
> 
> 	I quite agree. I've made sure to keep it functional and up-to-date ever
> since Bijan asked me to demo it last April, and I had to go back to 2.7
> to do it. :)  I've fixed some more bugs in it since Anthony's changes
> (e.g., snapshotting from the outside). I plan to release them along with
> Squat.
> 
> 	I'd be happy to help. If you haven't already, check out the Swiki page
> I wrote about running the simulator:
> 
> 	http://minnow.cc.gatech.edu/squeak/2465
> 
> 
> -C
> 
> --
> Craig Latta
> http://netjam.org/resume
> craig at netjam.org

-- 
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Alexandre Bergel  http://www.iam.unibe.ch/~bergel
^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.