git: openjdk/jdk: 8253778: ShenandoahSafepoint::is_at_shenandoah_safepoint should not access VMThread state from other threads

[Aleksey Shipilev]

Changeset: 8331e63f
Author:    Aleksey Shipilev <shade at openjdk.org>
Date:      2020-09-30 08:58:24 +0000
URL:       https://git.openjdk.java.net/jdk/commit/8331e63f

8253778: ShenandoahSafepoint::is_at_shenandoah_safepoint should not access VMThread state from other threads

Reviewed-by: jiefu, rehn, rkennke

! src/hotspot/share/gc/shenandoah/shenandoahUtils.hpp