8343340: Swapping checking do not work for MetricsMemoryTester failcount

[sendaoYan]

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Hi all,

This pull request contains a backport of commit 7e068cc8 from the openjdk/jdk repository.

The commit being backported was authored by SendaoYan on 20 Oct 2025 and was reviewed by Severin Gehwolf.

Thanks!

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Progress

• [x] Change must not contain extraneous whitespace
• [x] Commit message must refer to an issue
• [ ] JDK-8343340 needs maintainer approval

Issue

• JDK-8343340: Swapping checking do not work for MetricsMemoryTester failcount (Bug - P4)

Reviewing

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Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk17u-dev.git pull/4100/head:pull/4100
$ git checkout pull/4100

Update a local copy of the PR:
$ git checkout pull/4100
$ git pull https://git.openjdk.org/jdk17u-dev.git pull/4100/head

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Checkout this PR locally:
$ git pr checkout 4100

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$ git pr show -t 4100

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https://git.openjdk.org/jdk17u-dev/pull/4100.diff

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