RFR: 8215487: ZGC: ZRuntimeWorkers incorrectly identify themselves as ZWorkers

[Erik Österlund]

Hi Per,

Looks good.

Thanks,
/Erik

On 2018-12-17 15:49, Per Liden wrote:
> ZThread::is_worker() incorrectly returns true when executed from a 
> ZRuntimeWorkers context. This function should only return true when 
> executed from a ZWorker context. This issue can lead to data 
> corruption as a ZRuntimeWorker might read and write to data structures 
> that are thread local to a ZWorker.
>
> With this patch, the ZRuntimeWorkers will execute an initialize task 
> (similar to what ZWorkers already do) to initialize the "worker type" 
> data.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8215487
> Webrev: http://cr.openjdk.java.net/~pliden/8215487/webrev.0
>
> /Per