hg: shenandoah/jdk8/hotspot: [backport] 8237837: Shenandoah: assert(mem == __null) failed: only one safepoint

[rwestrel at redhat.com]

Changeset: 812fdcf9b4b3
Author:    roland
Date:      2020-12-02 10:02 +0100
URL:       https://hg.openjdk.java.net/shenandoah/jdk8/hotspot/rev/812fdcf9b4b3

[backport] 8237837: Shenandoah: assert(mem == __null) failed: only one safepoint
Reviewed-by: rkennke

! src/share/vm/gc_implementation/shenandoah/c2/shenandoahSupport.cpp
+ test/gc/shenandoah/compiler/BarrierInInfiniteLoop.java