I'm using callgrind to analyse a c++ program (roofit) which builds a 
large tree of many interdependent objects of a few classes. Ideally, I 
would like to track not only the function calls, but also from (and to) 
which object they are called, so for instance including the address of 
the passed `this` pointer.

Is such a thing possible and/or has it been tried before? And if not, 
would it be difficult to implement?

The alternative would be to build some kind of accounting system into 
the base classes in my code itself, but if it's easy in valgrind, that 
would be far preferable, since others can then also use it and I 
wouldn't have to mess up my own code :)

Without having any knowledge of the valgrind source, I would imagine 
that it could be implemented similarly or as a generalization of the 
seperate-callers options.

Cheers,
Patrick

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