2.cpp

class replacement
{
public:
  void **vmt;

  void setter(int a)
  {
    _setter(this, a);
  }

  int getter() const
  {
    return _getter(this);
  }

  int virtual_getter() const
  {
    return reinterpret_cast<getter_fn_t*>(vmt[1])(this);
  }

  void operator delete(void *_this)
  {
    void **vmt = (void**)_this;
    reinterpret_cast<void(*)(void*)>(vmt[0])(_this);
    ::operator delete(_this);
  }

  static setter_fn_t *_setter;
  static getter_fn_t *_getter;
};