Re: C++ ABI: cloning of constructors/destructors

[Nathan Sidwell <nathan at codesourcery dot com>]

dspezia@amadeus.net wrote:
> 
> Hi all,
> 
> I've just installed GCC 3.0 on a i386 linux box.
> 
> Having a look at the code generated from a dummy C++
> program, it seems constructors and destructors are
> generated twice even for the simplest classes.
> 
> I'm just curious: what is the purpose of this cloning process ?
See http://gcc.gnu.org/bugs.html#known, from which I quote

G++ emits two copies of constructors and destructors. 

       In general there are three types of constructors (and destructors). 
           1.The complete object constructor/destructor. 
           2.The base object constructor/destructor. 
           3.The allocating destructor/deallocating destructor. 
       The first two are different, when virtual base classes are involved. In some cases we can do better, and this is logged in GNATS.


nathan

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