Review Request (S) 8013945: CMS fatal error: must own lock MemberNameTable_lock

[serguei.spitsyn at oracle.com]

Please, review the fix for:
   bug: http://bugs.sun.com/view_bug.do?bug_id=8013945
   jbs: https://jbs.oracle.com/bugs/browse/JDK-8013945

Open webrev:
http://cr.openjdk.java.net/~sspitsyn/webrevs/2013/hotspot/8013945-JVMTI-JSR292.1/

Summary:
   CMS calls InstanceKlass::release_C_heap_structures() concurrently.
   The "delete mnt" needs to take MemberNameTable_lock if 
!SafepointSynchronize::is_at_safepoint().

Testing:
   The vm/mlvm and Nashorn tests, the tests listed in the bug report

Thanks,
Serguei