8331714: Make OopMapCache installation lock-free

[shipilev]

Clean backport to improve internal locking. Makes future backports clean.

Additional testing:

• GHA
• Linux x86_64 fastdebug hotspot_gc

---

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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Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk22u.git pull/225/head:pull/225
$ git checkout pull/225

Update a local copy of the PR:
$ git checkout pull/225
$ git pull https://git.openjdk.org/jdk22u.git pull/225/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 225

View PR using the GUI difftool:
$ git pr show -t 225

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk22u/pull/225.diff

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[bridgekeeper]

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[openjdk]

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

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

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

8331714: Make OopMapCache installation lock-free

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 9 new commits pushed to the master branch:

• 91a2e75: 8323552: AbstractMemorySegmentImpl#mismatch returns -1 when comparing distinct areas of the same instance of MemorySegment
• ca393c8: 8330576: ZYoungCompactionLimit should have range check
• 66cdc14: 8329958: Windows x86 build fails: downcallLinker.cpp(36) redefinition
• 70bd2c7: 8328075: Shenandoah: Avoid forwarding when objects don't move in full-GC
• f867d97: 8331746: Create a test to verify that the cmm id is not ignored
• 3ed85b9: 8316328: Test jdk/jfr/event/oldobject/TestSanityDefault.java times out for some heap sizes
• 851922d: 8331164: createJMHBundle.sh download jars fail when url needed to be redirected
• 3663b2d: 8327501: Common ForkJoinPool prevents class unloading in some cases
• b96b4f6: 8332490: JMH org.openjdk.bench.java.util.zip.InflaterInputStreams.inflaterInputStreamRead OOM

Please see this link for an up-to-date comparison between the source branch of this pull request and the master branch.
As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[openjdk]

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

[openjdk]

@shipilev Please do not rebase or force-push to an active PR as it invalidates existing review comments. Note for future reference, the bots always squash all changes into a single commit automatically as part of the integration. See OpenJDK Developers’ Guide for more information.

[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 (e1876997)

[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 d7d718d.
Since your change was applied there have been 9 commits pushed to the master branch:

• 91a2e75: 8323552: AbstractMemorySegmentImpl#mismatch returns -1 when comparing distinct areas of the same instance of MemorySegment
• ca393c8: 8330576: ZYoungCompactionLimit should have range check
• 66cdc14: 8329958: Windows x86 build fails: downcallLinker.cpp(36) redefinition
• 70bd2c7: 8328075: Shenandoah: Avoid forwarding when objects don't move in full-GC
• f867d97: 8331746: Create a test to verify that the cmm id is not ignored
• 3ed85b9: 8316328: Test jdk/jfr/event/oldobject/TestSanityDefault.java times out for some heap sizes
• 851922d: 8331164: createJMHBundle.sh download jars fail when url needed to be redirected
• 3663b2d: 8327501: Common ForkJoinPool prevents class unloading in some cases
• b96b4f6: 8332490: JMH org.openjdk.bench.java.util.zip.InflaterInputStreams.inflaterInputStreamRead OOM

Your commit was automatically rebased without conflicts.

[openjdk]

@shipilev Pushed as commit d7d718d.

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