8283520: JFR: Memory leak in dcmd_arena

[mgronlun]

Greetings,

This changeset will address the memory leak in the dcmd_arena.

Testing: jdk_jfr

Thanks to @shipilev for reporting this issue.

Thanks
Markus

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change must be properly reviewed (1 review required, with at least 1 reviewer)

Issue

• JDK-8283520: JFR: Memory leak in dcmd_arena

Reviewers

• Erik Gahlin (@egahlin - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk pull/8727/head:pull/8727
$ git checkout pull/8727

Update a local copy of the PR:
$ git checkout pull/8727
$ git pull https://git.openjdk.java.net/jdk pull/8727/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 8727

View PR using the GUI difftool:
$ git pr show -t 8727

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk/pull/8727.diff

[bridgekeeper]

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[openjdk]

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• hotspot-jfr

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[mlbridge]

Webrevs

• 01: Full - Incremental (c7a34d5d)
• 00: Full (0b233f39)

[openjdk]

@mgronlun 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:

8283520: JFR: Memory leak in dcmd_arena

Reviewed-by: egahlin

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 31 new commits pushed to the master branch:

• 5bea461: 8286734: (fc) FileChannelImpl#map() cleanup after merge of Foreign Function & Memory API
• 0c5ab6d: 8209038: Clarify the javadoc of Cipher.getParameters()
• 1d8e92a: 8213045: Add BigDecimal.TWO
• 8535d51: 8286788: Test java/lang/Thread/virtual/ThreadAPI.testGetStackTrace3 fails
• 8e602b8: 8286783: Expand use of @inheritdoc in InputStream and OutputStream subclasses
• ea713c3: 8286810: Use public [Double|Float].PRECISION fields in jdk.internal.math.[Double|Float]Consts
• 87d9d7f: 8286596: AArch64: -XX:UseBranchProtection=pac-ret crashes after JDK-8284161
• af07919: 8286729: G1: Calculation to fit in optional region in remaining pause time wrong
• c0d51d4: 8282080: Lambda deserialization fails for Object method references on interfaces
• e68024c: 8285485: Fix typos in corelibs
• ... and 21 more: https://git.openjdk.java.net/jdk/compare/77dfbb457083fd30da344d0cbea5b0510aa3a0fc...master

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.

[mgronlun]

/integrate

[openjdk]

Going to push as commit 6a8be35.
Since your change was applied there have been 42 commits pushed to the master branch:

• d936c30: 8280844: Epoch shift synchronization point for Compiler threads is inadequate
• 44b243a: 8286636: MacroAssembler::post_call_nop should have InstructionMark
• 93c8869: 8283849: AsyncGetCallTrace may crash JVM on guarantee
• ab14419: 8286706: JFR: 'jfr scrub' should overwrite output
• b5526e5: 8281712: [REDO] AArch64: Implement string_compare intrinsic in SVE
• 72bd41b: 8282280: Update Xerces to Version 2.12.2
• 2ed75be: 8286090: Add RC2/RC4 to jdk.security.legacyAlgorithms
• f17c68c: 8283577: SSLEngine.unwrap on read-only input ByteBuffer
• 61ddbef: 8002277: Refactor two PBE classes to simplify maintenance
• 141ef68: 8286338: suppress warnings about bad @author tags when author info is not generated.
• ... and 32 more: https://git.openjdk.java.net/jdk/compare/77dfbb457083fd30da344d0cbea5b0510aa3a0fc...master

Your commit was automatically rebased without conflicts.

[openjdk]

@mgronlun Pushed as commit 6a8be35.

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