8323159: Consider adding some text re. memory zeroing in Arena::allocate

[minborg]

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change requires CSR request JDK-8323526 to be approved

Issues

• JDK-8323159: Consider adding some text re. memory zeroing in Arena::allocate (Bug - P4)
• JDK-8323745: Missing comma in copyright header in TestScope (Bug - P1)
• JDK-8323526: Consider adding some text re. memory zeroing in Arena::allocate (CSR)

Reviewers

• Maurizio Cimadamore (@mcimadamore - Reviewer)
• Alan Bateman (@AlanBateman - Reviewer)

Reviewing

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$ git checkout pull/77

Update a local copy of the PR:
$ git checkout pull/77
$ git pull https://git.openjdk.org/jdk22.git pull/77/head

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Checkout this PR locally:
$ git pr checkout 77

View PR using the GUI difftool:
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Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back pminborg! 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 from the original commit.

[openjdk]

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

• core-libs

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[mlbridge]

Webrevs

• 01: Full - Incremental (9fa7cf85)
• 00: Full (45c100bb)

[minborg]

/issue add 8323745

[openjdk]

@minborg
Adding additional issue to issue list: 8323745: Missing comma in copyright header in TestScope.

[mcimadamore]

Looks good

[openjdk]

@minborg 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:

8323159: Consider adding some text re. memory zeroing in Arena::allocate
8323745: Missing comma in copyright header in TestScope

Reviewed-by: mcimadamore, alanb

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:

• 247a436: 8323651: compiler/c2/irTests/TestPrunedExHandler.java fails with -XX:+DeoptimizeALot
• 4799c8d: 8323631: JfrTypeSet::write_klass can enqueue a CLD klass that is unloading
• bb43aae: 8322330: JavadocHelperTest.java OOMEs with Parallel GC and ZGC
• 4034787: 8322987: Remove gc/stress/gclocker/TestGCLocker* since they always fail with OOME
• a91569d: 8322957: Generational ZGC: Relocation selection must join the STS
• 9257505: 8323101: C2: assert(n->in(0) == nullptr) failed: divisions with zero check should already have bailed out earlier in split-if
• 628e31b: 8322818: Thread::getStackTrace can fail with InternalError if virtual thread is timed-parked when pinned
• 3017281: 8322846: Running with -Djdk.tracePinnedThreads set can hang

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.

[minborg]

/integrate

[openjdk]

Going to push as commit 887a93b.
Since your change was applied there have been 21 commits pushed to the master branch:

• eb2c4b0: 8320175: [BACKOUT] 8316533: C2 compilation fails with assert(verify(phase)) failed: missing Value() optimization
• b2cc189: Merge
• c7f1c97: 8317547: Enhance TLS connection support
• 7fc13bb: 8314307: Improve loop handling
• 175184c: 8318588: Windows build failure after JDK-8314468 due to ambiguous call
• dfea48b: 8314468: Improve Compiler loops
• 83f0f84: 8317331: Solaris build failed with "declaration can not follow a statement (E_DECLARATION_IN_CODE)"
• 7586d8e: 8314295: Enhance verification of verifier
• e5cb83c: 8308204: Enhanced certificate processing
• f1802d5: 8321479: java -D-D crashes
• ... and 11 more: https://git.openjdk.org/jdk22/compare/8db5d865c1066c217c5b4e87b9e0881bfb1f5beb...master

Your commit was automatically rebased without conflicts.

[openjdk]

@minborg Pushed as commit 887a93b.

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