8057003: Large reference arrays cause extremely long synchronization times Summary: Slice large object arrays into parts so that the synchronization of marking threads with an STW pause request does not take long. Reviewed-by: ehelin, pliden

Merge

8169703: G1 crashes with guarantee(pretouch_gang != NULL) failed: No pretouch gang specified Summary: Allow use of AlwaysPreTouch without passing a WorkGang. Reviewed-by: kbarrett, dfazunen, ddmitriev

8169931: 8k class metaspace chunks misallocated from 4k chunk freelist​ Reviewed-by: mgerdin, coleenp, ehelin, stuefe

8167650: NMT should check for invalid MEMFLAGS Reviewed-by: dholmes, mockner, cjplummer

8168492: Convert CollectedHeap_test to GTest Reviewed-by: iignatyev, tschatzl

8168493: Convert TestBitMap_test to GTest Reviewed-by: kbarrett, tschatzl

8169232: SA: TestCpoolForInvokeDynamic.java fails with sun.jvm.hotspot.debugger.DebuggerException: binary search bug: should have found entry 1 Summary: Avoid potential data loss by avoiding the long-to-int cast of the return value of minus() Reviewed-by: dsamersoff, sspitsyn Contributed-by: jini.george@oracle.com

8166811: Missing memory fences between memory allocation and refinement Summary: Refactored to have needed barrier Reviewed-by: tschatzl, ehelin

8166607: G1 needs klass_or_null_acquire Summary: Use acquire where needed, split refinment humongous and non to simplify. Reviewed-by: tschatzl, ehelin

8165287: fix compress intrinsics to produce correct results with avx512 Reviewed-by: kvn

8170039: Change UseAVX < 3 on SKX/KNL to not emit evex vector check Reviewed-by: kvn

8168396: Unexpected OOME in GcCauseTest02 and GcTest02 Reviewed-by: tschatzl, dfazunen

8169870: CDS: "assert(partition_size <= size()) failed: partition failed" on 32 bit JVM Summary: Exit the VM and report error if the second ReservedSpace() call also fails. Reviewed-by: cjplummer, sspitsyn, iklam

8170100: AArch64: Crash in C1-compiled code accessing References Reviewed-by: roland