hg: jdk/sandbox: 8232733: Remove need to grab Threads_lock while processing handshakes

[chris.hegarty at oracle.com]

Changeset: 4a631f90648a
Author:    pchilanomate
Date:      2019-12-13 14:28 +0000
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/4a631f90648a

8232733: Remove need to grab Threads_lock while processing handshakes
Summary: Threads_lock is not acquired anymore while processing handshakes
Reviewed-by: coleenp, rehn, dcubed, dholmes

! src/hotspot/share/runtime/handshake.cpp
! src/hotspot/share/runtime/handshake.hpp
! src/hotspot/share/runtime/mutexLocker.cpp
! src/hotspot/share/runtime/mutexLocker.hpp
! src/hotspot/share/runtime/safepoint.cpp
! src/hotspot/share/runtime/thread.cpp
! src/hotspot/share/runtime/thread.hpp