git: openjdk/jdk17u: master: 8276201: Shenandoah: Race results degenerated GC to enter wrong entry point

[Zhengyu Gu]

Changeset: 7176520d
Author:    Zhengyu Gu <zgu at openjdk.org>
Date:      2021-11-09 13:00:14 +0000
URL:       https://git.openjdk.java.net/jdk17u/commit/7176520d44fcc5a967eda246f914bbc341b14179

8276201: Shenandoah: Race results degenerated GC to enter wrong entry point

Backport-of: dbf5100dd705fbe4a3aeae49405ca541d581f106

! src/hotspot/share/gc/shenandoah/shenandoahDegeneratedGC.cpp