RFR: 8357047: [ubsan] AdapterFingerPrint::AdapterFingerPrint runtime error: index 3 out of bounds

[Ashutosh Mehra]

On Thu, 22 May 2025 04:00:38 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> Refactor `AdapterFingerPrint` to remove the notion of compact representation. As the memory for storing fingerprint is always allocated next to the `AdapterFingerPrint` object, use of `_value` array is not required. This simplifies the implementation a bit, and would also fix the "false" positives flagged by ubsan when accessing `_value` array beyond its size (See the description in JBS issue).
>> 
>> Testing: hotspot_runtime on x86-64 with fastdebug build
>
> @ashu-mehra please pull [8357503](https://bugs.openjdk.org/browse/JDK-8357503) fix

@vnkozlov I have merged the changes from the master branch.

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PR Comment: https://git.openjdk.org/jdk/pull/25378#issuecomment-2901214147