[jdk19] RFR: 8288703: GetThreadState returns 0 for virtual thread that has terminated [v3]

[Serguei Spitsyn]

On Sat, 2 Jul 2022 03:35:11 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

>> This is fixing the JVM TI GetThreadState issue which returns for terminated virtual thread state = 0 instead of 2 (`JVMTI_THREAD_STATE_TERMINATED`). The problem was in the function `JvmtiEnvBase::get_threadOop_and_JavaThread` which does a check and reurns JVMTI_ERROR_THREAD_NOT_ALIVE a little bit early (before the values of `java_thread` and `thread_oop` are set). This was a root cause of the `GetThreadState` incorrect behavior.
>
> Serguei Spitsyn has updated the pull request incrementally with one additional commit since the last revision:
> 
>   resolved minor comments for the SelfSuspendDisablerTest test

Alan, Alex and Chris, thank you for reviews and comments!

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PR: https://git.openjdk.org/jdk19/pull/102