8305186: Reference.waitForReferenceProcessing should be more accessible to tests

[sendaoYan]

Hi all,

This pull request contains a backport of commit d8f012ea from the openjdk/jdk repository.

The commit being backported was authored by Brent Christian on 25 Apr 2025 and was reviewed by Kim Barrett.

Thanks!

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8305186 needs maintainer approval

Issue

• JDK-8305186: Reference.waitForReferenceProcessing should be more accessible to tests (Enhancement - P4 - Approved)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk17u-dev.git pull/4072/head:pull/4072
$ git checkout pull/4072

Update a local copy of the PR:
$ git checkout pull/4072
$ git pull https://git.openjdk.org/jdk17u-dev.git pull/4072/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 4072

View PR using the GUI difftool:
$ git pr show -t 4072

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk17u-dev/pull/4072.diff

Using Webrev

Link to Webrev Comment

[sendaoYan]

I have verified this clean backport PR locally with test test/jdk/java/lang/ref/FinalizerHistogramTest.java which use the newly added function.

[bridgekeeper]

👋 Welcome back syan! 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]

@sendaoYan 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:

8305186: Reference.waitForReferenceProcessing should be more accessible to tests

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 14 new commits pushed to the master branch:

• 0f26915: 8334771: [TESTBUG] Run TestDockerMemoryMetrics.java with -Xcomp fails exitValue = 137
• 0b3561a: 8355387: [jittester] Disable downcasts by default
• 3fa8f01: 8366092: [GCC static analyzer] UnixOperatingSystem.c warning: use of uninitialized value 'systemTicks'
• ... and 11 more: https://git.openjdk.org/jdk17u-dev/compare/207dd0f5b8b9bf52e22dd3e597a60af19975fe1f...master

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]

⚠️ @sendaoYan 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 (ed39be91)

[sendaoYan]

/approval request Clean backport to enhance test library which will fix test bug cause some test intermittently fails. Change has been verified with test test/jdk/java/lang/ref/FinalizerHistogramTest.java after backport JDK-8298783 manually, which use the newly added function by JDK-8305186. Test-fix only, no risk.

[openjdk]

@sendaoYan
8305186: The approval request has been created successfully.

[sendaoYan]

Thanks for the approved.

/integrate

[openjdk]

Going to push as commit a64ed9d.
Since your change was applied there have been 14 commits pushed to the master branch:

• 0f26915: 8334771: [TESTBUG] Run TestDockerMemoryMetrics.java with -Xcomp fails exitValue = 137
• 0b3561a: 8355387: [jittester] Disable downcasts by default
• 3fa8f01: 8366092: [GCC static analyzer] UnixOperatingSystem.c warning: use of uninitialized value 'systemTicks'
• ... and 11 more: https://git.openjdk.org/jdk17u-dev/compare/207dd0f5b8b9bf52e22dd3e597a60af19975fe1f...master

Your commit was automatically rebased without conflicts.

[openjdk]

@sendaoYan Pushed as commit a64ed9d.

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