hg: jdk/sandbox: 8212933: Thread-SMR: requesting a VM operation whilst holding a ThreadsListHandle can cause deadlocks

[chris.hegarty at oracle.com]

Changeset: 2b58b8e1d28f
Author:    rehn
Date:      2018-10-31 08:09 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/2b58b8e1d28f

8212933: Thread-SMR: requesting a VM operation whilst holding a ThreadsListHandle can cause deadlocks
Reviewed-by: eosterlund, dcubed, sspitsyn, dholmes

! src/hotspot/share/runtime/handshake.cpp
! src/hotspot/share/runtime/handshake.hpp
! src/hotspot/share/runtime/thread.cpp
! src/hotspot/share/runtime/thread.hpp
! src/hotspot/share/runtime/threadSMR.cpp
+ test/hotspot/jtreg/runtime/handshake/HandshakeWalkSuspendExitTest.java