8278627: Shenandoah: TestHeapDump test failed

[zhengyu123]

This intermittent failure seems to be observed only on Linux ppc64le, but it is not ppc specific problem.

With concurrent thread stack scanning/updating, nmtehod entry barrier has to be applied prior to thread stack/code roots scanning during heap iteration, to ensure scanner only sees to-space objects.

The patch also cleanup the use of nmethod::oops_do_marking_prologue/epilogue(), which should be used with nmethod::oops_do_try_claim() and closures that use the nmethod, e.g. MarkingCodeBlobClosure. Since Shenandoah switched to concurrent code root iteration, they are no longer applied.

Test:
The failure on Linux ppc64le is intermittent, usually sees a failure about 3 hotspot_gc_shenandoah runs. I have yet seen any failures after 10 runs with the patch.

SAP tested this patch in jdk/jdk repo in nightly tests, did not see failure so far.

---

Progress

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Issue

• JDK-8278627: Shenandoah: TestHeapDump test failed

Reviewers

• Aleksey Shipilev (@shipilev - Reviewer)
• Roman Kennke (@rkennke - Reviewer)

Reviewing

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[bridgekeeper]

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[openjdk]

@zhengyu123 The following labels will be automatically applied to this pull request:

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[mlbridge]

Webrevs

• 00: Full (03e66f0d)

[openjdk]

@zhengyu123 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:

8278627: Shenandoah: TestHeapDump test failed

Reviewed-by: shade, rkennke

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

• 54517fa: 8279074: ProblemList compiler/codecache/jmx/PoolsIndependenceTest.java on macosx-aarch64
• ac7430c: 8278044: ObjectInputStream methods invoking the OIF.CFG.getSerialFilterFactory() silent about error cases.
• db3d6d7: 8278087: Deserialization filter and filter factory property error reporting under specified

Please see this link for an up-to-date comparison between the source branch of this pull request and the master branch.
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➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[zhengyu123]

/integrate

[openjdk]

Going to push as commit 1128674.
Since your change was applied there have been 3 commits pushed to the master branch:

• 54517fa: 8279074: ProblemList compiler/codecache/jmx/PoolsIndependenceTest.java on macosx-aarch64
• ac7430c: 8278044: ObjectInputStream methods invoking the OIF.CFG.getSerialFilterFactory() silent about error cases.
• db3d6d7: 8278087: Deserialization filter and filter factory property error reporting under specified

Your commit was automatically rebased without conflicts.

[openjdk]

@zhengyu123 Pushed as commit 1128674.

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