Re: [boost] [serialization] Memoryleak invoid_caster::recursive_register

Subject: Re: [boost] [serialization] Memoryleak invoid_caster::recursive_register
From: Runar Undheim (R.Undheim_at_[hidden])
Date: 2009-07-01 03:50:51

Thanks! I only trusted the memory leak report from the program :(
The memory detection is done when the destructor on a static class i 
called, but it is not possible to decide which destructor is called 
first. So I wonder if it is any function I could call to manually free 
the memory. Then I could call this function in debug build before my 
code check for memory leaks.

- Runar

Robert Ramey wrote:
> This create objects which register themselves in a global table.  The table 
> and objects persist until the execution module ends.  Some methods of 
> checking for memory leaks might check before the table
> and it's members are destroyed so it might look like they are leaks - but 
> they're not.  This can be seen
> by setting a debugger break point on the destructor of voice_cast_shortcut.
>
> Robert Ramey
>
> Runar Undheim wrote:
>   
>> // implementation of void caster base class
>> BOOST_SERIALIZATION_DECL(void)
>> void_caster::recursive_register(bool includes_virtual_base) const {
>>    void_cast_detail::set_type & s
>>        =
>> void_cast_detail::void_caster_registry::get_mutable_instance();
>>    s.insert(this);
>>
>>    // generate all implied void_casts.
>>
>>    void_cast_detail::set_type::const_iterator it;
>>    for(it = s.begin(); it != s.end(); ++it){
>>        if(m_derived == (*it)->m_base)
>>            new void_caster_shortcut(
>>                (*it)->m_derived,
>>                m_base,
>>                m_difference + (*it)->m_difference,
>>                includes_virtual_base
>>            );
>>        if((*it)->m_derived == m_base)
>>            new void_caster_shortcut(
>>                m_derived,
>>                (*it)->m_base,
>>                m_difference + (*it)->m_difference,
>>                includes_virtual_base
>>            );
>>    }
>> }
>>
>> The new void_caster_shortcut in void_caster::recursive_register give
>> memory leak. The leak is only at startup of program, so it doesn't eat
>> any memory while the program is running. But it makes it difficult to
>> find other memory leaks when the program contain several leaks you
>> don't care about.
>>
>> - Runar
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