The rfe 4937022 (for adding I/O wait status) included much of the below,
but I/O wait status will not be implemented, so that rfe is being pulled.

JSR-166 adds a park concept (LockSupport.park) which needs a corresponding
thread status -- PARKED will be added (the JVMTI_THREAD_STATUS_
prefix is omitted here for readability)..

The ordering and numbering of thread status constants does not allow for the
logical addition of more constants, thus the constants need to be reordered
and renumbered.

The constant names are inconsistent and do not match common usage or the
java.lang.management.ThreadState API. The following renamings will be made:

    ZOMBIE ==> TERMINATED
    MONITOR ==> BLOCKED
    WAIT ==> WAITING

The old names will be available as synonyms during a transition period.

The BLOCKED state is specified as:

    Thread is waiting to enter a synchronization block.

and will be clarified to:

    Thread is waiting to enter a synchronization block or waiting to
re-enter
    a synchronization block after an Object.wait()

Also, a thread status flag willed added to indicate timed waits and
timed parks:

    JVMTI_THREAD_STATUS_FLAG_TIMED