21.07.2014 18:04, Alex Peshkoff wrote:

> Ahh - it's related with multiple inheritance and rtti. Luckily we do not
> use both in interfaces.

I didn't try your test app, but I can confirm the expected vtable layout 
(at least for IProvider) in the debugger (for gcc 4.8.2).

>> As for Free Pascal, they also reserve 12 bytes at the beginning of the
>> vtable, hence the compatibility issue.
>
> 12 byte? On 64-bit system?
> They are crazy!

Probably 12 bytes were about 32-bits, i.e. three additional pointers.


Dmitry


------------------------------------------------------------------------------
Want fast and easy access to all the code in your enterprise? Index and
search up to 200,000 lines of code with a free copy of Black Duck
Code Sight - the same software that powers the world's largest code
search on Ohloh, the Black Duck Open Hub! Try it now.
http://p.sf.net/sfu/bds
Firebird-Devel mailing list, web interface at 
https://lists.sourceforge.net/lists/listinfo/firebird-devel

Reply via email to