Re: mt_allocator (rev 1.28) has static initilization problems?

[Paolo Carlini <pcarlini at suse dot de>]

Brad Spencer wrote:

> I've been trying to the (trunk) mt_allocator within the gcc-3.4.0
> sources (in another email thread) for alignment reasons on SPARC, and
> so far, I haven't had problems there.  However, on i686-pc-linux-gnu,
> I've encountered problems with static initialization of the
> mt_allocator's _S_options structure.
Hi Brad and sorry for late replying.

For now, I want to simply add that probably I'm also seeing something
similar, on a 4-way x86_64 system. It's very difficult to reproduce, but 
this
is the symptom:

0x00000000004027e6 in __gnu_cxx::__mt_alloc<int>::deallocate (this=0x64, 
__p=0x401ffa10, __n=245)
   at mt_allocator.h:448
448                     __tmp = __tmp->_M_next;

As you can see, __n = 245, therefore, the code looping on __tmp = 
__tmp->_M_next
should not be executed at all! The only plausible explanation is that
_S_options._M_max_bytes is stuck at zero (as you reported) sigh!

I'm now studying the details of your message. Do you have any news, anyway?

Thanks,
Paolo