RFR: 8225035: Thread stack size issue caused by large TLS size

[Florian Weimer]

* Jiangli Zhou:

> No problem at all! I actually thought in the same direction as well
> when making the change initially but didn't go with it as I had some
> concerns. Florian's latest reply is reassuring (thanks again!). So
> here is the update:
> http://cr.openjdk.java.net/~jiangli/8225035/webrev_inc.05/.

I'm sorry, but I'm not familiar with Hotspot.  Is there external
locking?  Otherwise this code is not thread-safe.

Thanks,
Florian