RFR: 8373122: JFR build failure with CDS disabled due to -Werror=unused-function after JDK-8365400 [v2]

[Hao Sun]

On Tue, 23 Dec 2025 03:33:08 GMT, Hao Sun <haosun at openjdk.org> wrote:

>> `get_source(const AOTClassLocation* cl, JavaThread* jt)` is only used by `JfrClassDefineEvent::on_restoration()` within an `INCLUDE_CDS` guard.
>> 
>> Add the same `INCLUDE_CDS` guard to mitigate the GCC warning.
>> 
>> Tests: JDK build with CDS disabled passed on both x86_64 and aarch64.
>>        tier1~3 passed on both x86_64 and aarch64.
>
> Hao Sun has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Move down the helper to avoid introducing new conditions
>   
>   Address mgronlun's comment

Seems that I should backport this fix to jdk26 as this issue is a P3 bug and it affects jdk26 version as well.

Will create a backport PR soon.

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PR Comment: https://git.openjdk.org/jdk/pull/28917#issuecomment-3685733710