RFR: 8288984: Simplification in Shutdown.exit [v2]

[kristylee88]

On Sat, 2 Jul 2022 21:21:37 GMT, Ryan Ernst <duke at openjdk.org> wrote:

>> This is a followup to simplify Shutdown.exit after the removal of
>> finalizers (https://bugs.openjdk.org/browse/JDK-8198250). Once agreement
>> on the approach has been reached in this PR, a CSR will be filed to
>> propose the spec change to Runtime.exit.
>
> Ryan Ernst has updated the pull request incrementally with one additional commit since the last revision:
> 
>   better clarify multiple threads behavior

Marked as reviewed by kristylee88 at github.com (no known OpenJDK username).

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PR: https://git.openjdk.org/jdk/pull/9351