RFR: 8326509: Clean up JNIEXPORT in Hotspot after JDK-8017234 [v4]

[Magnus Ihse Bursie]

On Tue, 27 Feb 2024 11:01:03 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

>> Once [JDK-8017234](https://bugs.openjdk.org/browse/JDK-8017234) has been integrated, it is possible to do some cleanup. The goal of [JDK-8017234](https://bugs.openjdk.org/browse/JDK-8017234) was to not change any behavior, even if that behavior seemed odd.
>> 
>> Now let's try to fix that. We can:
>> 
>> a) remove JNIEXPORT from c2v functions.
>> b) make debug.cpp functions exported similarly on all platforms.
>> c) remove JNIEXPORT from aarch64 asm debug function.
>> 
>> Note that this PR is [dependent on](https://mail.openjdk.org/pipermail/jdk-dev/2021-March/005232.html) https://github.com/openjdk/jdk/pull/17955.
>
> Magnus Ihse Bursie has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 10 commits:
> 
>  - Merge branch 'master' into hotspot-symbols-followup
>  - Remove jvmci globals
>  - 8326509: Clean up JNIEXPORT in Hotspot after JDK-8017234
>  - Revert "Use #pragma instead of HIDDEN define"
>    
>    This reverts commit 00e40a7f6e4cdef6592d72b3d08063cdcc41532a.
>  - Use #pragma instead of HIDDEN define
>  - Rename the version script to version-script.txt
>  - Restore linker script to linux/gcc builds
>  - Rename the Windows export file to .def
>  - Remove unused symbol _Copy_conjoint_bytes on linux/arm32
>  - 8017234: Hotspot should stop using mapfiles

There was a bit back and forth with this PR, but now I believe it is finally ready. Any reviewers?

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PR Comment: https://git.openjdk.org/jdk/pull/17967#issuecomment-1967657651