8316929: Shenandoah: Shenandoah degenerated GC and full GC need to cleanup old OopMapCache entries

[shipilev]

Clean backport to eliminate Shenandoah memory leak.

Additional testing:

• macos-aarch64-server-fastdebug, hotspot_gc_shenandoah

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8316929 needs maintainer approval

Issue

• JDK-8316929: Shenandoah: Shenandoah degenerated GC and full GC need to cleanup old OopMapCache entries (Bug - P3 - Approved)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk17u-dev.git pull/2037/head:pull/2037
$ git checkout pull/2037

Update a local copy of the PR:
$ git checkout pull/2037
$ git pull https://git.openjdk.org/jdk17u-dev.git pull/2037/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 2037

View PR using the GUI difftool:
$ git pr show -t 2037

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk17u-dev/pull/2037.diff

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[bridgekeeper]

👋 Welcome back shade! 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]

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 (83342405)

[shipilev]

/approval request Clean backport to eliminate Shenandoah memory leak. Applies cleanly. Testing passes. Other GCs do the same thing.

[openjdk]

@shipilev
8316929: The approval request has been created successfully.

[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:

8316929: Shenandoah: Shenandoah degenerated GC and full GC need to cleanup old OopMapCache entries

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 1 new commit pushed to the master branch:

• 2f042a4: 8292458: Atomic operations on scoped enums don't build with clang

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.

[shipilev]

/integrate

[openjdk]

Going to push as commit f8e54a9.
Since your change was applied there has been 1 commit pushed to the master branch:

• 2f042a4: 8292458: Atomic operations on scoped enums don't build with clang

Your commit was automatically rebased without conflicts.

[openjdk]

@shipilev Pushed as commit f8e54a9.

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