> On 23 Nov 2018, at 14:59, Marcus Denker <marcus.den...@inria.fr> wrote:
>
>
>
>> On 23 Nov 2018, at 13:40, Manuel Leuenberger <leuenber...@inf.unibe.ch>
>> wrote:
>>
>> Hi,
>>
>> I stumbled upon another MetaLink scenario that I am unsure how to implement.
>> I want to track method invocations, with receiver, arguments, selector, and
>> return value (maybe even signaled exception). I can track the method input
>> with a MetaLink installed on an RBMethodNode like this:
>>
>> MetaLink new
>> metaObject: [ :c | Transcript show: c receiver; show: c method selector;
>> show: c arguments; cr ];
>> selector: #value:;
>> arguments: #(context).
>>
>> and for returns with a MetaLink on RBReturnNodes like this:
>>
>> MetaLink new
>> metaObject: [ :v | Transcript show: v; cr ];
>> selector: #value:;
>> arguments: #(value)
>>
>> The problem is though, that not all methods have explicit returns, and some
>> mix explicit returns and self returns. I tried installed an #after MetaLink
>> on a RBMethodNode, but this fails in many cases. Is there any way that I can
>> instrument a method and track receiver, selector, arguments, and returned
>> value (even if self) at the same time?
>>
>
> I am working now on making the #after work so that one can get with #value
> the return of the method…
>
> I now have a version where it works for Message Sends correctly *and* were
> #after on Method works better (the compilation errors should be fixed).
>
> But #value for #after on Method needs some more work… soon!
>
> I will commit this intermediate step now.
>
Here is the first step:
https://github.com/pharo-project/pharo/pull/2011
• #operation for send after
• #operation and value for {} arrays
• #after hooks: preamble now executed before the operation
• #after hooks: added concept of postamble, executed just before hook
Next I need to look into #value for #after on methods. This got broken because
we wrap the whole method in an exception handler (as #after should be called
even if
an exception happens).
But this adds too much complexity… especially how it is done now. I think I
will simplify that in a next step.
Marcus
