Le 2017-09-25 12:21, jtuchel@objektfabrik.de wrote :

Steven

You could add use a semaphore if changing code is an option.
We once used MethodWrappers in VAST to answer a similar question regarding whether a body of code can be removed from a system.

Joachim

This is exactly my usecase, i need to remove code that may be called by a method on the stack - and i know exactly which method. However my base hypothesis is that it is in an already running process (maybe a loop) and that part i cannot change. Is there an existing Pharo implementation of MethodWrappers ?

Le 2017-09-25 14:32, Ben Coman wrote :

I'm not sure if your wanting something more built in, or just "some way",

so for the latter, consider wrapping in with your own status flags...

 

status := #setup.

watcher := [[true] whileTrue:[ 

Transcript crShow: status. 

900 milliSeconds wait]

] forkAt:36.

result := 0.

worker := [[true] whileTrue:[ 

status := #WORKING. 

1 second wait.

result := result + 1. 

Transcript crShow: result. 

status:=#waiting. 

3 seconds wait]

] forkAt:35.

worker suspend.

worker resume.

 

cheers -ben

 

 I want to avoid adding control in the code, because hypothetically the process i want to check is already running and possibly written by somebody else. I've think about a similar solution using metalinks, but if the loop is on the stack then i don't know what i can do.

Le 2017-09-25 12:42, Marcus Denker a wrote :

you could iterate all processes, there then get the stack and look up the sender chain

if the method is somewhere to be found. If yes -> it is exectuted right now.

One problem is that which methods are on the stack changes, so you should

try to avoid process switches while doing the analysis.

 

Marcus

Ok so if i know which process to analyse, i can just do something like the following that i found in the Halt class:

[ cntxt isNil ] whileFalse: [
        cntxt selector = aSelector ifTrue: [ ... ].
        cntxt := cntxt sender ]

But if i actually found the method i was looking for on the stack, can i somehow ask the suspended context to "execute" until it returns from this method ?

Steven.