8259271: gc/parallel/TestDynShrinkHeap.java still fails "assert(covered_region.contains(new_memregion)) failed: new region is not in covered_region"

[omikhaltsova]

I'd like to backport JDK-8259271 to jdk13u for parity with jdk11u.
The original patch applied manually. The patch is absolutely identical to the jdk11u patch, it also uses OrderAccess instead of Atomic because the method was moved from OrderAccess to Atomic only in JDK 14 with JDK-8234562. It's the only difference with the original patch.
All regular tests passed.

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change must be properly reviewed

Issue

• JDK-8259271: gc/parallel/TestDynShrinkHeap.java still fails "assert(covered_region.contains(new_memregion)) failed: new region is not in covered_region"

Reviewers

• Yuri Nesterenko (@yan-too - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk13u-dev pull/263/head:pull/263
$ git checkout pull/263

Update a local copy of the PR:
$ git checkout pull/263
$ git pull https://git.openjdk.java.net/jdk13u-dev pull/263/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 263

View PR using the GUI difftool:
$ git pr show -t 263

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk13u-dev/pull/263.diff

[bridgekeeper]

👋 Welcome back omikhaltcova! 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]

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

[mlbridge]

Webrevs

• 00: Full (758b8975)

[openjdk]

@omikhaltsova This change now passes all automated pre-integration checks.

After integration, the commit message for the final commit will be:

8259271: gc/parallel/TestDynShrinkHeap.java still fails "assert(covered_region.contains(new_memregion)) failed: new region is not in covered_region"

Use load_acquire to order reads of top and end.

Reviewed-by: yan

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 no new commits pushed to the master branch. If another commit should be pushed before you perform the /integrate command, your PR will be automatically rebased. If you prefer to avoid any potential automatic rebasing, please check the documentation for the /integrate command for further details.

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[omikhaltsova]

/integrate

[openjdk]

@omikhaltsova
Your change (at version 758b897) is now ready to be sponsored by a Committer.

[yan-too]

/sponsor

[openjdk]

Going to push as commit 49355ef.

[openjdk]

@yan-too @omikhaltsova Pushed as commit 49355ef.

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