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

[Vladimir Kozlov]

On Thu, 22 May 2025 02:46:37 GMT, Ashutosh Mehra <asmehra 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

Nice. I will test it before approval.

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PR Review: https://git.openjdk.org/jdk/pull/25378#pullrequestreview-2859690926