8350106: [PPC] Avoid ticks_unknown_not_Java AsyncGetCallTrace() if JavaFrameAnchor::_last_Java_pc not set

[reinrich]

This pull request contains a backport of commit 030c85de from the openjdk/jdk repository.

The commit being backported was authored by Richard Reingruber on 11 Mar 2025 and was reviewed by Martin Doerr.

It does not apply because of copyright header differences and because frame::kind doesn't exist yet in jdk21u but appears in the context of the changes.

Risk is low because the patch is small and ppc only. The code is only reached when profiling with jfr or async-profiler.

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• JDK-8350106 needs maintainer approval
• Commit message must refer to an issue

Issue

• JDK-8350106: [PPC] Avoid ticks_unknown_not_Java AsyncGetCallTrace() if JavaFrameAnchor::_last_Java_pc not set (Bug - P4 - Approved)

Reviewers

• Paul Hohensee (@phohensee - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u-dev.git pull/1971/head:pull/1971
$ git checkout pull/1971

Update a local copy of the PR:
$ git checkout pull/1971
$ git pull https://git.openjdk.org/jdk21u-dev.git pull/1971/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 1971

View PR using the GUI difftool:
$ git pr show -t 1971

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk21u-dev/pull/1971.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back rrich! 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]

@reinrich 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:

8350106: [PPC] Avoid ticks_unknown_not_Java AsyncGetCallTrace() if JavaFrameAnchor::_last_Java_pc not set

Reviewed-by: phh

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:

• 72bcd82: 8352800: [PPC] OpenJDK fails to build on PPC after JDK-8350106
• f5ae66e: 8353489: Increase timeout and improve Windows compatibility in test/jdk/java/lang/ProcessBuilder/Basic.java
• 6b42243: 8353713: Improve Currency.getInstance exception handling
• ... and 11 more: https://git.openjdk.org/jdk21u-dev/compare/90bd1acaf16f6ba090c55d4255428857451bcf89...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.

[mlbridge]

Webrevs

• 00: Full (dde8b1c0)

[openjdk]

⚠️ @reinrich 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.

[reinrich]

/integrate

[openjdk]

Going to push as commit d590823.
Since your change was applied there have been 28 commits pushed to the master branch:

• 6b6961d: 8362548: [21u] Add bugId to test missed in backport of JDK-8343804
• e4c6e7c: 8357675: Amend headless message
• 99dfee6: 8347004: vmTestbase/metaspace/shrink_grow/ShrinkGrowTest/ShrinkGrowTest.java fails with CDS disabled
• ... and 25 more: https://git.openjdk.org/jdk21u-dev/compare/90bd1acaf16f6ba090c55d4255428857451bcf89...master

Your commit was automatically rebased without conflicts.

[openjdk]

@reinrich Pushed as commit d590823.

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