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

[Florian Weimer]

* Jiangli Zhou:

> Here is the full webrev:
> http://cr.openjdk.java.net/~jiangli/8225035/webrev.05/, including the
> additional comments above get_static_tls_area_size.
>
> Best regards,
> Jiangli
>
> On Mon, Jul 8, 2019 at 2:27 AM Florian Weimer <fweimer at redhat.com> wrote:
>>
>> * Jiangli Zhou:
>>
>> > As you, Florian, Thomas all made great contributions to this
>> > workaround, I should list all of you as both contributors and
>> > reviewers in the changeset. If there is any objection, please let me
>> > know.
>>
>> Can you share a link with the final patch?  I would like to have another
>> look.

Thanks, looks reasonable.

Note that a funny consequence is that the flag may now actually lower
stack sizes on recent glibcs because when the flag is enabled, the guard
size accounting is again what it used be.  Without the flag and
new-enough glibc, the guard size is added twice to the stack size (once
in OpenJDK and once in glibc).

Thanks,
Florian