[aspectc-user] capturing memory allocations

[Olaf Spinczyk]

Hi Tiago,

Tiago Rodrigues wrote:
> Hi, i'm new to aspectc,
> i'm trying to capture heap memory allocations to do a sort of memory profiller.
> My problem is that my advices don't get applied to the code.
> 
> Here is an example:
> 
> aspect:
> [CODE]
> aspect MemProf
> {
>         advice call("% operator new(...)") || call("% %::operator
> new(...)") : before()
> 	{
>               std::cout << "call to new()" << std::endl;
>         }
> };
> [/CODE]
> 
> sample code:
> [CODE]
> int main()
> {
>         class Test {};
> 	Test *t  = new Test;
>         int *i = new int[10];
>         delete[] i;
> 	delete t;
> 	return 0;
> }
> [/CODE]
> 
> the advice isn't being applied to the new calls.
> anyone can help?
> 
> using: ac-0.9.2, on linux
> gcc version: 3.4.3
> 
> thanks in advance,
> Tiago R.

you are right. call(...) does not match any 'new ...'. The reason is 
that we don't consider an object instantiation on the heap to be a call.

We have started to provide support for join points related to object 
instantiation with construction and destruction advice. A client-side 
construction/destruction advice is still missing :-(.

For now, I can only recommend to do it the classical way, i.e. by 
implementing your own new operator, which you link with your 
application. Maybe construction/destruction advice also helps you, 
although you are only able to destinguish between automatic variable 
allocation and heap allocation by checking the object address.

Olaf