[cxx-abi-dev] C++ ABI version 2

[Anthony Williams]

On 20/11/13 01:57, Richard Smith wrote:
> There are a few things in the current ABI which are known to be
> suboptimal, but we cannot change because doing so would introduce an ABI
> break. However, vendors sometimes get an opportunity to break their ABI
> (or are defining a new ABI), and for some vendors, this is a very common
> occurrence. To this end, I think it would be valuable for the ABI
> document to describe what we might want to put in a 'Version 2' of the
> ABI; that is, a set of changes that we recommend be made whenever a
> vendor has a chance to introduce an ABI break.

> Are there any other things that it would make sense to change in a
> version 2 of the ABI?

If people are willing to make an ABI change, it would be great if they
could add in the necessary information to allow std::current_exception
to take a copy of the exception rather than increasing the reference
count on the existing exception.

See my blog post on the subject, with a patch for gcc 4.5.0.

http://www.justsoftwaresolutions.co.uk/cplusplus/copying_exceptions.html

Anthony
-- 
Author of C++ Concurrency in Action     http://www.stdthread.co.uk/book/
just::thread C++11 thread library             http://www.stdthread.co.uk
Just Software Solutions Ltd       http://www.justsoftwaresolutions.co.uk
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