Need help to understand TLS behavior

[Martin Buchholz]

On Mon, Dec 14, 2015 at 8:44 PM, David Holmes <david.holmes at oracle.com> wrote:
> On 15/12/2015 6:53 AM, Martin Buchholz wrote:
>>
>> Thread local storage is trouble.
>>
>> java stack sizes should be in _addition_ to any OS overhead, which
>> includes TLS.
>
>
> TLS shouldn't be coming out the stack of the thread AFAIK - I see nothing
> about that in "ELF Handling for Thread Local Storage". That is why I want to
> know more about the test, the compilation environment and the execution
> environment.

I have also struggled to understand "ELF Handling for Thread Local Storage".

> Do you mean that the value specified at the Java level should be rounded up
> to accommodate guard pages etc at the native level?

Yes, I think so. All of the -Xss size should be available for actual
stack frames.