[cxx-abi-dev] N3639 (arrays of runtime bound): __cxa_bad_array_length

[Florian Weimer]

On 04/22/2013 09:00 AM, Florian Weimer wrote:
> On 04/21/2013 01:19 AM, Richard Smith wrote:
>> N3639, which was voted into the C++14 committee draft today, adds a
>> std::bad_array_length exception which an implementation is required to
>> throw if the computed bound for a VLA ("array of runtime bound") is
>> "erroneous".
>>
>> "erroneous" can be any of:
>>   - bound <= 0
>>   - bound > some implementation-defined limit
>>   - bound < number of initializers provided
>
> Do we want to throw an exception if the stack hasn't got sufficient
> space for the array?  Then we need a fundamentally different interface
> (probably a stack limit stored in a TLS variable or an alloca-like
> function).
>
> I should probably askon the standards list what the expectations are.

Uhm, is this about N3497?  N3639 does not seem to exist yet (or if it 
does, I'd appreciate someone sending me a copy).

-- 
Florian Weimer / Red Hat Product Security Team