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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Issue

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

Reviewers

• Christoph Langer (@RealCLanger - Reviewer)

Reviewing

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[bridgekeeper]

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[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

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At the time when this comment was updated there had been 3 new commits pushed to the jdk25 branch:

• 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
• c5d0f1b: 8360776: Disable Intel APX by default and enable it with -XX:+UnlockExperimentalVMOptions -XX:+UseAPX in all builds

Please see this link for an up-to-date comparison between the source branch of this pull request and the jdk25 branch.
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[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

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[mlbridge]

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• 00: Full (6ed82475)