8361602: [TESTBUG] serviceability/HeapDump/UnmountedVThreadNativeMethodAtTop.java deadlocks on exception

[reinrich]

This pull request contains a backport of commit 917d0182 from the openjdk/jdk repository.

It moves the notify() call to the finally block to avoid the deadlock in join() if verifyHeapDump(dumpFile) throws an exception. It also wraps the wait into a loop to protect against spurious wake up.

The commit being backported was authored by Richard Reingruber on 12 Jul 2025 and was reviewed by Chris Plummer, Christoph Langer and David Holmes.

Testing was done with fastdebug and release builds on the main platforms and also on Linux/PPC64le and AIX.

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Progress

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Issue

• JDK-8361602: [TESTBUG] serviceability/HeapDump/UnmountedVThreadNativeMethodAtTop.java deadlocks on exception (Bug - P4)

Reviewers

• Christoph Langer (@RealCLanger - Reviewer)
• Chris Plummer (@plummercj - Reviewer)

Reviewing

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[bridgekeeper]

👋 Welcome back rrich! A progress list of the required criteria for merging this PR into jdk25 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:

8361602: [TESTBUG] serviceability/HeapDump/UnmountedVThreadNativeMethodAtTop.java deadlocks on exception

Reviewed-by: clanger, cjplummer

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 4 new commits pushed to the jdk25 branch:

• 20fc8f7: 8361529: GenShen: Fix bad assert in swap card tables
• dd82a09: 8350177: C2 SuperWord: Integer.numberOfLeadingZeros, numberOfTrailingZeros, reverse and bitCount have input types wrongly truncated for byte and short
• 9f21845: 8360775: Fix Shenandoah GC test failures when APX is enabled
• ... and 1 more: https://git.openjdk.org/jdk/compare/c374ac6df4b1ba830668e46c208d01fdf063bc23...jdk25

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 jdk25 branch, type /integrate in a new comment.

[openjdk]

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

[openjdk]

@reinrich The following label will be automatically applied to this pull request:

• serviceability

When this pull request is ready to be reviewed, an "RFR" email will be sent to the corresponding mailing list. If you would like to change these labels, use the /label pull request command.

[mlbridge]

Webrevs

• 00: Full (6ed82475)

[reinrich]

Thanks for reviewing.
/integrate

[openjdk]

Going to push as commit ce85123.
Since your change was applied there have been 4 commits pushed to the jdk25 branch:

• 20fc8f7: 8361529: GenShen: Fix bad assert in swap card tables
• dd82a09: 8350177: C2 SuperWord: Integer.numberOfLeadingZeros, numberOfTrailingZeros, reverse and bitCount have input types wrongly truncated for byte and short
• 9f21845: 8360775: Fix Shenandoah GC test failures when APX is enabled
• ... and 1 more: https://git.openjdk.org/jdk/compare/c374ac6df4b1ba830668e46c208d01fdf063bc23...jdk25

Your commit was automatically rebased without conflicts.

[openjdk]

@reinrich Pushed as commit ce85123.

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