RFR: 8334223: Make Arena MEMFLAGs immutable [v3]

[Thomas Stuefe]

On Sat, 22 Jun 2024 16:42:21 GMT, Afshin Zafari <azafari at openjdk.org> wrote:

>> Thomas Stuefe has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains five additional commits since the last revision:
>> 
>>  - feedback david
>>  - Merge branch 'master' into arena-constify-memflags
>>  - feedback johan
>>  - Merge branch 'master' into arena-constify-memflags
>>  - start
>
> Thanks, I could only found some missing Copyright updates:
> - `compilerThread.cpp`
> - `resourceArea.cpp` and its `hpp`
> - `jni.cpp`, maybe for RedHat also?
> - `handles.hpp`
> - `thread.hpp`

@afshin-zafari if you are happy, mind approving? Thanks!

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PR Comment: https://git.openjdk.org/jdk/pull/19693#issuecomment-2186536525