I glad to present very simple implementation of object centric debugging based on Ghost and ObjectVirus projects.
You can try it by:
smalltalkhubUser: ‘Pharo’ project: ‘Ghost’;
With this package you can ask any object to #haltOnNextCall and It adds new button in debugger “Run to next self send”.
You can look at details here http://dionisiydk.blogspot.fr/2016/04/halt-next-object-call.html