RFR: Store cpu features in AOTCodeCache header [v3]

Thu Jul 24 21:45:14 UTC 2025

On Wed, 23 Jul 2025 22:12:28 GMT, Ashutosh Mehra <asmehra at openjdk.org> wrote:

>> `src/hotspot/share/utilities/formatBuffer.hpp` changes should be done separately in mainline. And then ported into premain branch.
>
>> src/hotspot/share/utilities/formatBuffer.hpp changes should be done separately in mainline. And then ported into premain branch.
> 
> I am working on putting in mainline. In the meantime, should I remove the patch that introduced these changes and revert back to earlier implementation?

@ashu-mehra 

Look on `test/hotspot/jtreg/compiler/arraycopy/stress/TestStressArrayCopy.java` how to get CPU features using WB instead of running separate processes.

Also add ` * @requires os.simpleArch == "x64"` if you want to run it only on x64.

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PR Comment: https://git.openjdk.org/leyden/pull/84#issuecomment-3115069029