8373464: Test JdkManagementCheckSince.java fails after JDK-8369736

[iklam]

Please review this small fix and the plan of action for backporting JDK-8369736 to JDK 26.

(JDK-8369736 is under https://openjdk.org/jeps/3#Late-Enhancement-Request-Process)

Background

The "actually introduced version" for HotSpotAOTCacheMXBean is found using the ct.sym file (JdkManagementCheckSince.java uses test/jdk/tools/sincechecker/SinceChecker.java, which doesn't read ct.sym directly, but uses JavacTool with --release N, which in turn loads ct.sym)

$ unzip -l ./images/jdk/lib/ct.sym | grep HotSpotAOTCacheMXBean.sig
      167 2025-12-11 03:16 R/jdk.management/jdk/management/HotSpotAOTCacheMXBean.sig

"R" is JDK 27 ("1" is JDK 1, "A" is JDK 10, "B" is JDK 11, etc ...)

In comparison, VirtualThreadSchedulerMXBean was first introduced in "O" = JDK 24, and its API has not changed since)

$ unzip -l ./images/jdk/lib/ct.sym | grep VirtualThreadSchedulerMXBean.sig
      313 2025-12-11 03:16 OPQR/jdk.management/jdk/management/VirtualThreadSchedulerMXBean.sig

Note that if an API has evolved over time, we may have several .sig files:

$ unzip -l ./images/jdk/lib/ct.sym | grep util/Vector.sig
     3058 2025-12-11 03:16 8/java.base/java/util/Vector.sig
     3182 2025-12-11 03:16 9A/java.base/java/util/Vector.sig
     3272 2025-12-11 03:16 BCDEFGHIJKLMNOPQR/java.base/java/util/Vector.sig

ct.sym is generated from files in src/jdk.compiler/share/data/symbols

$ cd src/jdk.compiler/share/data/symbols
$ grep VirtualThreadSchedulerMXBean *
jdk.management-O.sym.txt:class name jdk/management/VirtualThreadSchedulerMXBean

Because HotSpotAOTCacheMXBean is not listed in any of the .sym.txt files, it's added as version "R" in ct.sym

$ grep HotSpotAOTCacheMXBean * | wc
      0 0 0

Proposed plan of action

1. In the mainline, update HotSpotAOTCacheMXBean.java to use @since 27 (this PR) to fix the current test failure in the mainline.

2. When backporting HotSpotAOTCacheMXBean.java to JDK 26 (with approval), it should have @since 26.

3. After JDK 26 is finalized, update the mainline:

   • Add HotSpotAOTCacheMXBean to jdk.management-Q.sym.txt
   • Update HotSpotAOTCacheMXBean.java to use @since 26.

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8373464: Test JdkManagementCheckSince.java fails after JDK-8369736 (Bug - P3)

Reviewers

• David Holmes (@dholmes-ora - Reviewer)
• Aleksey Shipilev (@shipilev - Reviewer)
• Kevin Walls (@kevinjwalls - Reviewer)

Reviewing

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$ git pull https://git.openjdk.org/jdk.git pull/28760/head

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$ git pr checkout 28760

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[bridgekeeper]

👋 Welcome back iklam! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

@iklam This change now passes all automated pre-integration checks.

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After integration, the commit message for the final commit will be:

8373464: Test JdkManagementCheckSince.java fails after JDK-8369736

Reviewed-by: dholmes, shade, kevinw

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At the time when this comment was updated there had been 1 new commit pushed to the master branch:

• 920a99f: 8370731: Tests in vmTestbase/nsk/monitoring/GarbageCollectorMXBean/CollectionCounters/ failed: OutOfMemoryError

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[openjdk]

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[mlbridge]

Webrevs

• 00: Full (336cbc4e)

[dholmes-ora]

Good and trivial. Thanks for fixing.

[shipilev]

Looks good.

[iklam]

Thanks @dholmes-ora @shipilev @kevinjwalls for the review
/integrate

[openjdk]

Going to push as commit 2a1c676.
Since your change was applied there have been 7 commits pushed to the master branch:

• b0bd0c3: 8372759: Test build/AbsPathsInImage.java fails after JDK-8370438
• e1d1d53: 8167268: StandardGlyphVector.getGlyphMetrics creates metrics with erroneous bounds for characters with no outline (e.g., the space character ' ')
• aa986be: 8373421: Parallel: Rename young generation eden and survivor space pool
• ... and 4 more: https://git.openjdk.org/jdk/compare/74dca863c2e61c13884c3454b8da7be125235970...master

Your commit was automatically rebased without conflicts.

[openjdk]

@iklam Pushed as commit 2a1c676.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.