Add support for ZGC on HotSpot #5050
Description
TL;DR
Add support for Z Garbage Collector to the Graal compiler.
Goals
Add required ZGC barriers on HotSpot along with any relevant performance optimizations, allowing the use of ZGC when the Graal is used as a JIT compiler.
Non-Goals
- Add support for ZGC to GraalVM Native Image
- Add support for Shenandoah GC (although ZGC support will make it easier to support other GCs in the future)