Re: [Boost-users] Boost.Test claims Qt leaks memory

From: Steve M. Robbins (steve_at_[hidden])
Date: 2007-09-04 23:51:41

On Tue, Sep 04, 2007 at 09:02:11AM +0200, Uwe Schuster wrote:

> > My first line of attack is to clean up after Qt somehow.
> > (c.f. 
> http://lists.trolltech.com/qt-interest/2007-08/thread00997-0.html)
> 
> Hello,
> 
>  The hack there doesn't work, because the memory leak detection
>  capability is not implemented in Boost.Test itself, it is a feature
>  of the MS VC++ Debug runtime libraries (MSVCRxxD.dll), so the leak
>  detector starts before that application is running.

Right.  I dug a bit further into it and managed to make
the "ignore the first QObject creation" hack work as follows.

// Have Boost.Test ignore the memory leak from Qt static data.
class IgnoreQtStaticData
{
public:
    IgnoreQtStaticData()
    {
#if BOOST_MSVC
        // Disable all heap debugging, allocate and destroy a QObject,
        // then re-enable heap debugging.
        int flags = _CrtSetDbgFlag( 0 );
        allocate();
        _CrtSetDbgFlag( flags );
#endif
    }

    static void allocate()
    {
        QObject obj;
    };
};

static IgnoreQtStaticData ignoreQtStaticData;

Regards,
-Steve