RFR: 8370578: SystemMapTest.java#normal fails intermittendly on macOS aarch64

[Simon Tooke]

On Wed, 29 Oct 2025 16:05:37 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

>> This PR addresses [JDK-8370578](https://bugs.openjdk.org/browse/JDK-8370578)  
>> 
>> Under certain circumstances, OpenJDK on macOS maps the hsperf segment private instead of shared; one of those cases is hit during the tier1 tests, which test for that.  
>> 
>> This PR allows for shared or private mapping; the purpose of the intermittently failing test is to test System.map implementation, not JDK internals.
>
> Arguably, this is simple enough to fall under the trivial rule, but lets wait for other reviewers a bit.

@tstuefe @plummercj @sspitsyn thanks for the reviews.

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PR Comment: https://git.openjdk.org/jdk/pull/28025#issuecomment-3467848558