But if you want new message send logic only for your registered objects then you can use Ghost for this. It provides some infrastructure to implement such strange objects

2016-04-26 15:30 GMT+02:00 Denis Kudriashov <dionisiydk@gmail.com>:
Hi

2016-04-26 14:39 GMT+02:00 Steven Costiou <steven.costiou@kloum.io>:

Hello,

i am not new to Pharo nor to the list but this is the first time i speak here, so : hi =)

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I started a phd a few month ago (with Alain Plantec) on context oriented programming and dynamic programs adaptation. I am using Pharo for my experiments and i would like to intercept messages sent to an object just before they get to their receiver. To be more specific, when #msg is sent to an object o, i want to be able to intercept it just before it is actually executed with the following objects at my disposal : the receiver (o), the message or selector, the sender. My objective by doing that is to (try to) change the lookup for a given method, and to be able to choose in which class the lookup will start.

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I have been looking a bit and it does not seem to be a "simple" way to do that in Pharo. Is that even possible and if so, any advice on where i should look ?

I think it is not possible from image side. As I understand correctly you are going to change general message send mechanizm. You could hack VM for this.