8336911: ZGC: Division by zero in heuristics after JDK-8332717

[MBaesken]

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8336911 needs maintainer approval

Issue

• JDK-8336911: ZGC: Division by zero in heuristics after JDK-8332717 (Bug - P4 - Approved)

Reviewing

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Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u-dev.git pull/1149/head:pull/1149
$ git checkout pull/1149

Update a local copy of the PR:
$ git checkout pull/1149
$ git pull https://git.openjdk.org/jdk21u-dev.git pull/1149/head

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$ git pr checkout 1149

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https://git.openjdk.org/jdk21u-dev/pull/1149.diff

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[bridgekeeper]

👋 Welcome back mbaesken! 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]

@MBaesken 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:

8336911: ZGC: Division by zero in heuristics after JDK-8332717

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 8 new commits pushed to the master branch:

• 5b1a952: 8336257: Additional tests in jmxremote/startstop to match on PID not app name
• fa07b3d: 8319673: Few security tests ignore VM flags
• bcc85d9: 8318442: java/net/httpclient/ManyRequests2.java fails intermittently on Linux
• 6affc09: 8340801: Disable ubsan checks in some awt/2d coding
• 1af737e: 8339892: Several security shell tests don't set TESTJAVAOPTS
• d0abff2: 8207908: JMXStatusTest.java fails assertion intermittently
• c5d75ef: 8337410: The makefiles should set problemlist and adjust timeout basing on the given VM flags
• d81d301: 8342181: Update tests to use stronger Key and Salt size

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

[openjdk]

⚠️ @MBaesken 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.

[mlbridge]

Webrevs

• 00: Full (783565ce)

[MBaesken]

macOS aarch GHA infra broken 'xcode-select: error: invalid developer directory"

[MBaesken]

/integrate

[openjdk]

Going to push as commit f36b3b4.
Since your change was applied there have been 14 commits pushed to the master branch:

• 4f6c506: 8344164: [s390x] ProblemList hotspot/jtreg/runtime/NMT/VirtualAllocCommitMerge.java
• 38f654e: 8343724: [PPC64] Disallow OptoScheduling
• 1bfb57d: 8342607: Enhance register printing on x86_64 platforms
• fe41d0a: 8343506: [s390x] multiple test failures with ubsan
• e1eb341: 8342183: Update tests to use stronger algorithms and keys
• 0fd3173: 8342188: Update tests to use stronger key parameters and certificates
• 5b1a952: 8336257: Additional tests in jmxremote/startstop to match on PID not app name
• fa07b3d: 8319673: Few security tests ignore VM flags
• bcc85d9: 8318442: java/net/httpclient/ManyRequests2.java fails intermittently on Linux
• 6affc09: 8340801: Disable ubsan checks in some awt/2d coding
• ... and 4 more: https://git.openjdk.org/jdk21u-dev/compare/22d5e0d1f8849410abe40165b58f45f5e4293884...master

Your commit was automatically rebased without conflicts.

[openjdk]

@MBaesken Pushed as commit f36b3b4.

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