libstdc++ / mt_allocator.cc when using gthreads

[Laurent Alfonsi]

Well, I don't know mt_allocator enough to know if this is a fix for real 
or a quick fix.
Regards,
Laurent

On 04/19/12 16:26, Paolo Carlini wrote:
> Hi,
>>      All,
>>
>> The enclosed testcases (very close to
>> ext/mt_allocator/deallocate_global_thread-1.cc) exposes a pattern
>> where the following sequence is called (when __gthread_active_p is
>> enabled) :
>>
>>      __gthread_key_create(&key,::_M_destroy_thread_key);
>>      __gthread_setspecific(key, (void*)_M_id);
>>      __gthread_key_delete(key);
>>      __gthread_setspecific(key, (void*)_M_id);
> I didn't look into the issue in any detail - and I'm really glad that
> you are interested in improving mt_allocator - but I think that before
> going for quick patches, we should strive for fixing the underlying
> issue, eg prevent the above from occurring. After all, if you are right,
> the issue is very, very old, and nobody complained yet, thus better try
> very hard to fix it for real, finally. Do you have any plans for that?
>
> Thanks,
> Paolo.
>