RFR: 8366477: Refactor AOT-related flag bits in klass.hpp [v3]

[Ashutosh Mehra]

On Thu, 4 Sep 2025 22:01:51 GMT, Ioi Lam <iklam at openjdk.org> wrote:

>> This PR is one (of many) steps in [JDK-8366473](https://bugs.openjdk.org/browse/JDK-8366473) (Refactor CDS source code with new AOT terminology):
>> 
>> 1. Rename from `Klass::_shared_class_flags` to `Klass::_aot_class_flags`
>> 2. Move `_has_aot_safe_initializer` and `_is_runtime_setup_required` from `InstanceKlassFlags` (has run out of bits) to here (we still have 7 extra bits left), to accommodate future `@AOTXXX` annotations.
>
> Ioi Lam has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 10 commits:
> 
>  - @liach and @ashu-mehra comment: Renamed Klass::_is_generated_shared_class -> _is_aot_generated_class
>  - Merge branch 'master' into 8366477-refactor-aot-related-flag-bits-in-klass-hpp.saved
>  - Merge branch '8366475-rename-metaspace-shared-to-aot-metaspace' into 8366477-refactor-aot-related-flag-bits-in-klass-hpp
>  - removed unnecessary includes
>  - Redo changes in comments and tests
>  - Merge branch '8366474-rename_metaspaceobj_is_shared_to_in_aot_cache' into 8366475-rename-metaspace-shared-to-aot-metaspace
>  - Removed MetaspaceShared -> AOTMetaspace changes that are intended for https://github.com/openjdk/jdk/pull/27017
>  - 8366477: Refactor AOT-related flag bits in klass.hpp
>  - Rename MetaspaceShared -> AOTMetaspace
>  - 8366474: Rename MetaspaceObj::is_shared() to MetaspaceObj::in_aot_cache()

lgtm

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Marked as reviewed by asmehra (Committer).

PR Review: https://git.openjdk.org/jdk/pull/27018#pullrequestreview-3187789942