Memory leak in BOOST_CLASS_EXPORT registration

[Runar Undheim <r.undheim@…>]

Added example of code that will give memory leak. The code is tested with MSVC-8.0. When run in debug the program will show three memory leaks. If I set a break point in the void_caster_shortcut constructor the function is run once, but the destructor is never called.

#include <stdio.h>
#include <tchar.h>
#include <crtdbg.h>


#include <boost/archive/binary_oarchive.hpp>
#include <boost/serialization/export.hpp>

class Base {
  friend class boost::serialization::access;
  template<class Archive>
  void serialize(Archive & ar, const unsigned int version) {  }

  virtual void vTest() { }
};

class Level1 : public Base {
  friend class boost::serialization::access;
  template<class Archive>
  void serialize(Archive & ar, const unsigned int version)
  { ar & boost::serialization::base_object<Base>(*this); }
};

class Level2 : public Level1 {
  friend class boost::serialization::access;
  template<class Archive>
  void serialize(Archive & ar, const unsigned int version)
  { ar & boost::serialization::base_object<Level1>(*this); }
};

BOOST_CLASS_EXPORT(Base)
BOOST_CLASS_EXPORT(Level1)
BOOST_CLASS_EXPORT(Level2)

int _tmain(int argc, _TCHAR* argv[])
{
  _CrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
  return 0;
}

[Robert Ramey]

I've fixed this on my own machine.

I don't know if it will get uploaded/tested in time for inclusion in 1.41.

Thanks for providing a good test case. It was very helpful.

Robert Ramey

[Runar Undheim <r.undheim@…>]

Some of the memory leaks are gone, but there are still some memory leaks left in the registration code. I have updated the example with Level3 and Level4 and get new leaks. See attached file. To make the code easier to debug it is possible to comment out BOOST_CLASS_EXPORT(Level4). Then you only get one leak.

[Robert Ramey]

I've found this and fixed on my own machine. It will be checked into the trunk shortly.

I don't think I could have tracked this down without your test.

Robert Ramey