8372564: Convert StringDedup to use Atomic<T>

[kimbarrett]

Please review this change to StringDedup to use Atomic rather than directly
applying AtomicAccess to volatile members.

Testing: mach5 tier1-5

---

Progress

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Issue

• JDK-8372564: Convert StringDedup to use Atomic<T> (Enhancement - P4)

Reviewers

• Ivan Walulya (@walulyai - Reviewer)

Reviewing

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[bridgekeeper]

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[openjdk]

@kimbarrett 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:

8372564: Convert StringDedup to use Atomic<T>

Reviewed-by: iwalulya

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 10 new commits pushed to the master branch:

• da8e41a: 8365623: test/jdk/sun/security/pkcs11/tls/ tests skipped without skip exception
• 561c544: 8367096: jdk/open/test/jdk/sun/security/pkcs11/ rsa, ec, config, secmod and sslecc tests are skipping but showing as pass
• 5f5bf19: 8319540: GC: Make TestSelectDefaultGC use createTestJavaProcessBuilder
• ... and 7 more: https://git.openjdk.org/jdk/compare/7cd3d7f157708ebb6ce972b46a1a90379f63d08f...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.

[openjdk]

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[mlbridge]

Webrevs

• 00: Full (a14d77ce)