[aspectc-user] pointers

Olaf Spinczyk Olaf.Spinczyk at informatik.uni-erlangen.de
Thu Jul 14 11:23:51 CEST 2005


Jamal Siadat wrote:
> And for the Bug:
> I may have acciedently discovered a bug! I have attached a couple of files
> that you may look at. The interesting thing is that if you change the
> before advice to an after advice in the aspect you'll get a segmentation
> fault when you run it!!!!!
> Oh and can anyone tell me how I can get away with using the after advice
> and being able to capture the arguments. As you can see I've tried 
> *tjp->arg<1>() as well but it doesn't seem to work.
> Thanks in advance,

computers start counting at 0 ;-).

This modified aspect works for me:

aspect Cache  {
pointcut calls()=  call("float dummy(...) ") && within ("% A::a(...)") ;
advice calls() :after (){

// cout << "b is "<< *tjp->arg<1>() <<endl;
cout << "in the advice b is "<< *tjp->arg<0>()  <<endl;

I suppose the problem was that you used the unsafe dynamic join point 
API to access an argument that did not exist. The result is 
undeterministic behavior.

Best regards,


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