[11u] RFR 8266354: JDK-8215624 causes assert(worker_id < _n_workers) failed: Invalid worker_id

[buddyliao(廖彬)]

Dear all,

Would you help me to review the following backport from jdk-master? This backport is bugfix for the prefer backport https://bugs.openjdk.java.net/browse/JDK-8266352


Original bug:
https://bugs.openjdk.java.net/browse/JDK-8251570<https://bugs.openjdk.java.net/browse/JDK-8215624>
https://hg.openjdk.java.net/jdk/jdk/rev/dd827a012e43

Original patch does not apply cleanly to 11u,  since the code structure has changed.
Notably, I had to make it fit with 11u-dev.

11u webrev:
   https://cr.openjdk.java.net/~lzang/BuddyLiao/8266354/webrev01/

Testing: x86_64 build, affected tests, tier1

Thanks,
-Buddy