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

[Per Liden]

Thanks Erik!

/Per

On 12/17/2018 04:28 PM, Erik Österlund wrote:
> 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
>