hg: jdk/jdk: 8245880: Shenandoah: check class unloading flag early in concurrent code root scan

[zgu at redhat.com]

Changeset: 3a8634555a01
Author:    zgu
Date:      2020-05-29 13:40 -0400
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/3a8634555a01

8245880: Shenandoah: check class unloading flag early in concurrent code root scan
Reviewed-by: shade

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