RFR (S): 8218446: SuspendAtExit hangs

[Robbin Ehn]

Hi David!

> 
> The fix is quite simple: we put the thread in the _thread_blocked state exactly 
> as we already do for the suspend path in 
> JavaThread::check_special_condition_for_native_trans.

Thanks for making the S/R saner, I agree totally!

Looks good!

/Robbin

> 
> With that fix SuspendAt Exit no longer appears to hang.
> 
> Additional testing: (all tests that use suspend() just for good measure) (in 
> progress)
>    - hotspot
>      - vmtestbase/nsk/jdi
>      - runtime/Thread/SuspendAtExit.java
>      - runtime/handshake/HandshakeWalkSuspendExitTest.java
>      - runtime/jni/terminatedThread/TestTerminatedThread.java
>      - vmTestbase/nsk/jvmti/GetThreadState/thrstat002/
>    - jdk
>      - com/sun/jdi/PopAsynchronousTest.java
>      - java/nio/channels/SocketChannel/SendUrgentData.java
>      - java/lang/management/ThreadMXBean/ThreadMXBeanStateTest.java
>      - java/lang/ThreadGroup/Suspend.java
> 
> Plus mach5 tiers 1-3.
> 
> Thanks,
> David