RFR: 8342380: Implement JEP 498: Warn upon Use of Memory-Access Methods in sun.misc.Unsafe [v3]

[Chen Liang]

On Mon, 18 Nov 2024 09:42:20 GMT, Alan Bateman <alanb at openjdk.org> wrote:

>> Change default value of the command line option --sun-misc-unsafe-memory-access from "allow" to "warn".
>
> Alan Bateman has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains six commits:
> 
>  - Merge branch 'master' into JDK-8342380
>  - Merge branch 'master' into JDK-8342380
>  - Update test
>  - Merge branch 'master' into JDK-8342380
>  - Update usage/man page
>  - Initial commit

I noted that `sun.misc.Unsafe` is currently missing warnings for `arrayIndexScale` and `addressSize` deprecated in JEP 471.  Without warnings, developers may miss these two methods for migration.

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PR Comment: https://git.openjdk.org/jdk/pull/21762#issuecomment-2498827300