RFR: 8370578: SystemMapTest.java#normal fails intermittendly on macOS aarch64 [v3]

[Chris Plummer]

On Wed, 29 Oct 2025 19:12:45 GMT, Simon Tooke <stooke 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.
>
> Simon Tooke has updated the pull request incrementally with one additional commit since the last revision:
> 
>   whitespace error

Marked as reviewed by cjplummer (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/28025#pullrequestreview-3395760548