hg: hsx/hotspot-rt/hotspot: 8010151: nsk/regression/b6653214 fails "assert(snapshot != NULL) failed: Worker should not be started"

[zhengyu.gu at oracle.com]

Changeset: 35f8765422b9
Author:    zgu
Date:      2013-04-10 08:55 -0400
URL:       http://hg.openjdk.java.net/hsx/hotspot-rt/hotspot/rev/35f8765422b9

8010151: nsk/regression/b6653214 fails "assert(snapshot != NULL) failed: Worker should not be started"
Summary: Fixed a racing condition when shutting down NMT while worker thread is being started, also fixed a few mis-declared volatile pointers.
Reviewed-by: dholmes, dlong

! src/share/vm/runtime/thread.hpp
! src/share/vm/services/memTrackWorker.cpp
! src/share/vm/services/memTrackWorker.hpp
! src/share/vm/services/memTracker.cpp
! src/share/vm/services/memTracker.hpp