[master] RFR: Merge jdk:jdk-26+26 [v3]

[Y. Srinivas Ramakrishna]

On Wed, 17 Dec 2025 12:00:16 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

>> Merge upstream tag jdk-26+26
>> 
>> There is a remaining regression that I have no time to investigate at the moment, I filed a bug to track it: https://bugs.openjdk.org/browse/JDK-8373698
>> 
>> Testing:
>>  - [x] tier1 -UCOH
>>  - [X] tier1 +UCOH
>
> Roman Kennke has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:
> 
>   wq8347710: [Lilliput] Implement 4 byte headers
>   
>   Reviewed-by: stuefe

Marked as reviewed by ysr (Reviewer).

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PR Review: https://git.openjdk.org/lilliput/pull/206#pullrequestreview-3590346818