8291830: jvmti/RedefineClasses/StressRedefine failed: assert(!is_null(v)) failed: narrow klass value can never be zero

[TheRealMDoerr]

Backport of JDK-8291830.

---

Progress

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

Issue

• JDK-8291830: jvmti/RedefineClasses/StressRedefine failed: assert(!is_null(v)) failed: narrow klass value can never be zero (Bug - P2)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk17u-dev.git pull/1478/head:pull/1478
$ git checkout pull/1478

Update a local copy of the PR:
$ git checkout pull/1478
$ git pull https://git.openjdk.org/jdk17u-dev.git pull/1478/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 1478

View PR using the GUI difftool:
$ git pr show -t 1478

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk17u-dev/pull/1478.diff

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[bridgekeeper]

👋 Welcome back mdoerr! 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]

@TheRealMDoerr 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:

8291830: jvmti/RedefineClasses/StressRedefine failed: assert(!is_null(v)) failed: narrow klass value can never be zero

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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[mlbridge]

Webrevs

• 00: Full (719e4adf)

[GoeLin]

Please check the pre-submit tests before pushing.

[TheRealMDoerr]

/integrate

[openjdk]

Going to push as commit 9824e64.
Since your change was applied there have been 4 commits pushed to the master branch:

• 2e5a402: 8293012: ConstantPool::print_on can crash if _cache is NULL
• fb1741c: 8309956: Shenandoah: Strengthen the mark word check in string dedup
• 3773e0b: 8309228: Clarify EXPERIMENTAL flags comment in hotspot/share/runtime/globals.hpp
• aa3b4e4: 8305236: Some LoadLoad barriers in the interpreter are unnecessary after JDK-8220051

Your commit was automatically rebased without conflicts.

[openjdk]

@TheRealMDoerr Pushed as commit 9824e64.

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

[TheRealMDoerr]

hs/tier1 fails often. Unrelated.