RFR: 8366716: Move SmapsParser from runtime/os/TestTracePageSizes.java into testlib [v2]

[SendaoYan]

On Sun, 14 Sep 2025 10:02:45 GMT, jonghoonpark <duke at openjdk.org> wrote:

>> related jira issue: https://bugs.openjdk.org/browse/JDK-8366716
>> 
>> ---
>> 
>> Following the direction outlined in the issue description,
>> I've extracted the common parts from `TestTracePageSizes` and `TestTransparentHugePagesHeap` to implement the `SmapsParser` test library.
>> 
>> I've confirmed that it works without issues in my local tests.
>> 
>> Reviews and feedback are welcome.
>
> jonghoonpark has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:
> 
>   Refactor: Introduce SmapsParser
>   
>   Signed-off-by: jonghoonpark <dev at jonghoonpark.com>

Marked as reviewed by syan (Committer).

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PR Review: https://git.openjdk.org/jdk/pull/27273#pullrequestreview-3223126472