8331714: Make OopMapCache installation lock-free

[shipilev]

Clean backport to improve internal locking. Also makes future backports clean.

Additional testing:

• Linux x86_64 fastdebug all

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8331714 needs maintainer approval

Issue

• JDK-8331714: Make OopMapCache installation lock-free (Enhancement - P4 - Approved)

Reviewing

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$ git fetch https://git.openjdk.org/jdk21u-dev.git pull/608/head:pull/608
$ git checkout pull/608

Update a local copy of the PR:
$ git checkout pull/608
$ git pull https://git.openjdk.org/jdk21u-dev.git pull/608/head

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Checkout this PR locally:
$ git pr checkout 608

View PR using the GUI difftool:
$ git pr show -t 608

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https://git.openjdk.org/jdk21u-dev/pull/608.diff

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[openjdk]

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

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

8331714: Make OopMapCache installation lock-free

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At the time when this comment was updated there had been 3 new commits pushed to the master branch:

• b7c7006: 8331266: Bump update version for OpenJDK: jdk-21.0.5
• 2971cb5: 8320692: Null icon returned for .exe without custom icon
• 60402f8: 8330275: Crash in XMark::follow_array

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[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

⚠️ @shipilev This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[mlbridge]

Webrevs

• 00: Full (a64a2eb6)

[shipilev]

/approval request Clean backport to improve internal locking. Also makes future backports clean by avoiding lock ranking problems. The patch was in mainline for 3 weeks without bugtail. The change is simple, and thus the risk is on the lower side.

[openjdk]

@shipilev
8331714: The approval request has been created successfully.

[shipilev]

/integrate

[openjdk]

Going to push as commit fb7713d.
Since your change was applied there have been 6 commits pushed to the master branch:

• a3b14cf: 8330576: ZYoungCompactionLimit should have range check
• 9fcb4cd: 8318479: [jmh] the test security.CacheBench failed for multiple threads run
• 171a4c6: 8332490: JMH org.openjdk.bench.java.util.zip.InflaterInputStreams.inflaterInputStreamRead OOM
• b7c7006: 8331266: Bump update version for OpenJDK: jdk-21.0.5
• 2971cb5: 8320692: Null icon returned for .exe without custom icon
• 60402f8: 8330275: Crash in XMark::follow_array

Your commit was automatically rebased without conflicts.

[openjdk]

@shipilev Pushed as commit fb7713d.

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