git: openjdk/mobile: 8240588: _threadObj cannot be used on an exiting JavaThread

[duke]

Changeset: 17dd7dc3
Author:    David Holmes <dholmes at openjdk.org>
Date:      2020-05-13 22:29:54 +0000
URL:       https://git.openjdk.java.net/mobile/commit/17dd7dc3

8240588: _threadObj cannot be used on an exiting JavaThread

Reviewed-by: rehn, dcubed, kbarrett

! src/hotspot/share/memory/universe.cpp
! src/hotspot/share/prims/whitebox.cpp
! src/hotspot/share/runtime/thread.cpp
! src/hotspot/share/runtime/thread.hpp
! src/hotspot/share/runtime/threadSMR.cpp
! src/hotspot/share/runtime/threadSMR.hpp
+ test/hotspot/jtreg/runtime/Thread/ThreadObjAccessAtExit.java
! test/lib/sun/hotspot/WhiteBox.java