8275704: Metaspace::contains() should be threadsafe

[tstuefe]

Makes Metaspace::contains() threadsafe by adding fences to VS list node walking.

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Progress

• Change must not contain extraneous whitespace
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Issue

• JDK-8275704: Metaspace::contains() should be threadsafe

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk17u-dev pull/1120/head:pull/1120
$ git checkout pull/1120

Update a local copy of the PR:
$ git checkout pull/1120
$ git pull https://git.openjdk.org/jdk17u-dev pull/1120/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 1120

View PR using the GUI difftool:
$ git pr show -t 1120

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk17u-dev/pull/1120.diff

[bridgekeeper]

👋 Welcome back stuefe! 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]

@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:

8275704: Metaspace::contains() should be threadsafe

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[mlbridge]

Webrevs

• 00: Full (d0479f87)

[tstuefe]

/integrate

[openjdk]

Going to push as commit 4a9bd23.
Since your change was applied there have been 5 commits pushed to the master branch:

• b22bce8: 8276086: Increase size of metaspace mappings
• 1a38e26: 8297963: Partially fix string expansion issues in UTIL_DEFUN_NAMED and related macros
• 4e5f5de: 8192931: Regression test java/awt/font/TextLayout/CombiningPerf.java fails
• 5fd778b: 8300692: GCC 12 reports some compiler warnings in bundled freetype
• 651ba86: 8286694: Incorrect argument processing in java launcher

Your commit was automatically rebased without conflicts.

[openjdk]

@tstuefe Pushed as commit 4a9bd23.

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