Le 2017-09-25 12:21, [email protected] 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.
