hg: jdk/sandbox: 8251910: Shenandoah: Handshake threads between weak-roots and reset phases

[chris.hegarty at oracle.com]

Changeset: d3a3938bce38
Author:    zgu
Date:      2020-08-18 13:34 -0400
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/d3a3938bce38

8251910: Shenandoah: Handshake threads between weak-roots and reset phases
Reviewed-by: rkennke

! src/hotspot/share/gc/shenandoah/shenandoahControlThread.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.hpp
! src/hotspot/share/gc/shenandoah/shenandoahPhaseTimings.hpp