RFR: 8293592: Remove JVM_StopThread, stillborn, and related cleanup [v2]

[Serguei Spitsyn]

On Fri, 23 Sep 2022 21:47:06 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Now that Thread.stop has been degraded to throw `UnsupportedOperationException` (JDK-8299610) the only direct source of async exceptions is from JVMTI `StopThread`. We can remove the `JVM_StopThread` code, remove the `stillborn` field from `java.lang.Thread` and its associated accesses from the VM, and we can stop special-casing `ThreadDeath` handling (as was done for the JDK code as part of JDK-8299610).
>> 
>> Note that JVMTI `StopThread` can only act on a thread that is alive, so it is no longer possible to stop a thread before it has been started.
>> 
>> Also note that there is a change in behaviour for JNI `ExceptionDescribe` as it no longer ignores `ThreadDeath` exceptions (not that it was ever specified to ignore them, it simply mirrored the behaviour of the default `UncaughtExceptionHandler` in `java.lang.ThreadGroup` - which also no longer ignores them so the mirroring behaviour remains the same).
>> 
>> Testing: tiers 1-3
>
> David Holmes has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 16 commits:
> 
>  - Merge branch 'master' into 8293592-JVM_StopThread
>  - Removal all special handling of ThreadDeath.
>  - Remove all references to the stillborn field
>  - Initial commit: remove JVM_StopThread
>  - Merge
>  - Updates to Java Thread Primitive Deprecation page
>  - Repalce "it" with "victim thread"
>  - Merge
>  - Revert test/langtools/ProblemList.txt as jshell tests no longer rely on Thread.stop
>  - become -> became in javadoc
>  - ... and 6 more: https://git.openjdk.org/jdk/compare/3675f4c2...4eb07903

This looks good to me.
I do not see any issues.
Thanks,
Serguei

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Marked as reviewed by sspitsyn (Reviewer).

PR: https://git.openjdk.org/jdk/pull/10400