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List:       openjdk-serviceability-dev
Subject:    Integrated: 8293592: Remove JVM_StopThread, stillborn, and related cleanup
From:       David Holmes <dholmes () openjdk ! org>
Date:       2022-09-27 21:07:30
Message-ID: BsCrAy-uo0iUxDCh-4qeIke7J8SzLNsQDQPmOFY2lEA=.752c76c3-b4f9-4332-984c-ada05db68180 () github ! com
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On Fri, 23 Sep 2022 06:17:34 GMT, David Holmes <dholmes@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

This pull request has now been integrated.

Changeset: 763d4bf0
Author:    David Holmes <dholmes@openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/763d4bf0749e54f74821e5155f672ed24d6f2fcd
                
Stats:     208 lines in 18 files changed: 19 ins; 146 del; 43 mod

8293592: Remove JVM_StopThread, stillborn, and related cleanup

Reviewed-by: alanb, sspitsyn, rehn, coleenp

-------------

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


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