Re: [boost] reflection for smart_ptr cycles?

Rene Rivera wrote:

A "faster" way to infer cycles for pointers could be done with a bit more information on the shared_ptr. If you keep a set of object memory spans (heap address, and class sizeof) for all shared instances you can find all shared_ptrs that fall within those shared instances.

See sp_collector.cpp.

With that you can build the reference graph to detect the cycles.

Except that you can't. :-) struct X { std::vector<Y> v_; }; If Y has shared_ptr instances that refer back to X, this is untraceable, because the tracer doesn't know that it should follow the pointer inside the std::vector.