8277654: Shenandoah: Don't produce new memory state in C2 LRB runtime call

[earthling-amzn]

Testing:

• hotspot_gc_shenandoah
• dacapo
• extremem
• specjbb2015
• hyperalloc

---

Progress

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

Issue

• JDK-8277654: Shenandoah: Don't produce new memory state in C2 LRB runtime call (Enhancement - P4)

Reviewing

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$ git pull https://git.openjdk.org/jdk17u-dev.git pull/1448/head

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[bridgekeeper]

👋 Welcome back wkemper! 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]

@earthling-amzn 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:

8277654: Shenandoah: Don't produce new memory state in C2 LRB runtime call

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:

• 832707b: 8229147: Linux os::create_thread() overcounts guardpage size with newer glibc (>=2.27)
• dfe3555: 8303215: Make thread stacks not use huge pages
• 52fb263: 8306428: RunThese30M.java crashed with assert(early->flag() == current->flag() || early->flag() == mtNone)
• 00b8f5d: 8308643: Incorrect value of 'used' jvmstat counter
• e0c9643: 8306281: function isWsl() returns false on WSL2
• 8dae82c: 8309613: [Windows] hs_err files sometimes miss information about the code containing the error
• bd0e479: 8153837: AArch64: Handle special cases for MaxINode & MinINode
• 7c97df2: 8309862: Unsafe list operations in JfrStringPool
• 19acd07: 8307301: Update HarfBuzz to 7.2.0
• f8e0f6e: 8307604: gcc12 based Alpine build broken build after JDK-8307301
• ... and 21 more: https://git.openjdk.org/jdk17u-dev/compare/249ddf4c42a271c58624890fb13d7afbce710e07...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.

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[mlbridge]

Webrevs

• 01: Full - Incremental (028a821a)
• 00: Full (16df3df8)

[shipilev]

I think it needs JDK-8287227 as the follow-up too, see linked issues in the JIRA.

[earthling-amzn]

Should JDK-8287227 come in a separate PR? or should I cherry-pick that change into this PR?

[shipilev]

Should JDK-8287227 come in a separate PR? or should I cherry-pick that change into this PR?

What you did is right: a dependent PR. Get the push approval for both PRs, and then integrate them one by one.

[earthling-amzn]

/integrate

[openjdk]

@earthling-amzn
Your change (at version 028a821) is now ready to be sponsored by a Committer.

[shipilev]

/sponsor

[openjdk]

Going to push as commit b8a65e0.
Since your change was applied there have been 31 commits pushed to the master branch:

• 832707b: 8229147: Linux os::create_thread() overcounts guardpage size with newer glibc (>=2.27)
• dfe3555: 8303215: Make thread stacks not use huge pages
• 52fb263: 8306428: RunThese30M.java crashed with assert(early->flag() == current->flag() || early->flag() == mtNone)
• 00b8f5d: 8308643: Incorrect value of 'used' jvmstat counter
• e0c9643: 8306281: function isWsl() returns false on WSL2
• 8dae82c: 8309613: [Windows] hs_err files sometimes miss information about the code containing the error
• bd0e479: 8153837: AArch64: Handle special cases for MaxINode & MinINode
• 7c97df2: 8309862: Unsafe list operations in JfrStringPool
• 19acd07: 8307301: Update HarfBuzz to 7.2.0
• f8e0f6e: 8307604: gcc12 based Alpine build broken build after JDK-8307301
• ... and 21 more: https://git.openjdk.org/jdk17u-dev/compare/249ddf4c42a271c58624890fb13d7afbce710e07...master

Your commit was automatically rebased without conflicts.

[openjdk]

@shipilev @earthling-amzn Pushed as commit b8a65e0.

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