JDK-8318089: Class space not marked as such with NMT when CDS is off

[tstuefe]

If Xshare is off, we don't correctly register class space with NMT. We should do that.

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Issue

• JDK-8318089: Class space not marked as such with NMT when CDS is off (Bug - P4)

Reviewers

• Hamlin Li (@Hamlin-Li - Reviewer)
• David Holmes (@dholmes-ora - Reviewer)

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[mlbridge]

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• 00: Full (12aba87a)

[Hamlin-Li]

LGTM.

[openjdk]

@tstuefe 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:

8318089: Class space not marked as such with NMT when CDS is off

Reviewed-by: mli, dholmes

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 76 new commits pushed to the master branch:

• 24bc5bd: 8318104: macOS 10.13 check in TabButtonAccessibility.m can be removed
• e25a49a: 8318471: ProblemList compiler/sharedstubs/SharedTrampolineTest.java
• ce8ebeb: 8317979: Use TZ database style abbreviations in the CLDR locale provider
• ab13568: 8318029: Minor improvement to logging output in container at-requires
• 278de7a: 8318458: Update javac and java manpages with restricted method options
• 6fc3514: 8318363: Foreign benchmarks fail to build on some platforms
• 31ef400: 8318183: C2: VM may crash after hitting node limit
• 4e77b3c: 8315974: Make fields final in 'com.sun.crypto.provider' package
• 8dd8096: 8317886: Add @sealedGraph to ByteBuffer
• 9843c97: 8318365: Test runtime/cds/appcds/sharedStrings/InternSharedString.java fails after JDK-8311538
• ... and 66 more: https://git.openjdk.org/jdk/compare/7d31146f4d4ec81728c591d839ee2bb942e5e5fa...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.

[dholmes-ora]

So why not just uncomment this line, instead of moving this to the caller?

[tstuefe]

There are two initialization paths: one is used when running with CDS, and metaspace is initialized together with it, and one is when running without CDS. This function is used for both. The CDS path is already covered, though, I only need to do the NMT registration for the non-CDS case. Otherwise, we register things doubly.

[tstuefe]

Should have written that in the PR description, sorry.

[dholmes-ora]

Thanks for the explanation.

Looks good.

[tstuefe]

Thanks @dholmes-ora !

/integrate

[openjdk]

Going to push as commit c0e154c.
Since your change was applied there have been 76 commits pushed to the master branch:

• 24bc5bd: 8318104: macOS 10.13 check in TabButtonAccessibility.m can be removed
• e25a49a: 8318471: ProblemList compiler/sharedstubs/SharedTrampolineTest.java
• ce8ebeb: 8317979: Use TZ database style abbreviations in the CLDR locale provider
• ab13568: 8318029: Minor improvement to logging output in container at-requires
• 278de7a: 8318458: Update javac and java manpages with restricted method options
• 6fc3514: 8318363: Foreign benchmarks fail to build on some platforms
• 31ef400: 8318183: C2: VM may crash after hitting node limit
• 4e77b3c: 8315974: Make fields final in 'com.sun.crypto.provider' package
• 8dd8096: 8317886: Add @sealedGraph to ByteBuffer
• 9843c97: 8318365: Test runtime/cds/appcds/sharedStrings/InternSharedString.java fails after JDK-8311538
• ... and 66 more: https://git.openjdk.org/jdk/compare/7d31146f4d4ec81728c591d839ee2bb942e5e5fa...master

Your commit was automatically rebased without conflicts.

[openjdk]

@tstuefe Pushed as commit c0e154c.

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