8230808: Remove Access::equals()

[shipilev]

This is the first patch in the series to cleanup/revert the GC BarrierSets to most current state. See the dependent ("this issue blocks" links) issues to see what is next.

The equals APIs were added for Shenandoah GC, in the incarnation that exposed both from- and to-copies to the runtime system (see JDK-8199781). Since then, Shenandoah greatly simplified this by switching to a strong to-space invariant, which obviates the need for this API. Therefore, it was removed in JDK 14. This patch reverts JDK 11 parts to that shape as well, which should simplify 11u maintenance.

Additional testing:

• Linux x86_64 {release, fastdebug, slowdebug} builds
• Linux x86_64 tier1, tier2 with Shenandoah, Parallel

---

Progress

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

Issue

• JDK-8230808: Remove Access::equals()

Reviewers

• Paul Hohensee (@phohensee - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk11u-dev pull/100/head:pull/100
$ git checkout pull/100

Update a local copy of the PR:
$ git checkout pull/100
$ git pull https://git.openjdk.java.net/jdk11u-dev pull/100/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 100

View PR using the GUI difftool:
$ git pr show -t 100

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk11u-dev/pull/100.diff

[bridgekeeper]

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[openjdk]

This backport pull request has now been updated with issue from the original commit.

[mlbridge]

Webrevs

• 00: Full (566518f3)

[shipilev]

Friendly reminder.

[phohensee]

Lgtm.

[openjdk]

@shipilev This change now passes all automated pre-integration checks.

After integration, the commit message for the final commit will be:

8230808: Remove Access::equals()

Reviewed-by: phh

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 86 new commits pushed to the master branch:

• 815d3e1: 8267625: AARCH64: typo in LIR_Assembler::emit_profile_type
• 4da3fb8: 8268261: C2: assert(n != __null) failed: Bad immediate dominator info.
• 05c7697: 8269668: [aarch64] java.library.path not including /usr/lib64
• 37bc75b: 8241768: git needs .gitattributes
• 351cb48: 8225583: Examine the HttpResponse.BodySubscribers for null handling and multiple subscriptions
• 8ae2846: 8232243: Wrong caret position in JTextPane on Windows with a screen resolution > 100%
• a2af649: 8268775: Password is being converted to String in AccessibleJPasswordField
• 7639f8c: 8262470: Printed GlyphVector outline with low DPI has bad quality on Windows
• 0e2d915: 8257620: Do not use objc_msgSend_stret to get macOS version
• 6e60332: 8269795: C2: Out of bounds array load floats above its range check in loop peeling resulting in SEGV
• ... and 76 more: https://git.openjdk.java.net/jdk11u-dev/compare/d07f6d910bddcc4a9f1b6ddb8f24065c9be91340...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.

[shipilev]

Got the push approval.

/integrate

[openjdk]

Going to push as commit 7751352.
Since your change was applied there have been 90 commits pushed to the master branch:

• 35fcac6: 8168304: Make all of DependencyContext_test available in product mode
• cf2cf25: 8266761: AssertionError in sun.net.httpserver.ServerImpl.responseCompleted
• 0c783b0: 8257497: Update keytool to create AKID from the SKID of the issuing certificate as specified by RFC 5280
• aebdee3: 8230674: Heap dumps should exclude dormant CDS archived objects of unloaded classes
• 815d3e1: 8267625: AARCH64: typo in LIR_Assembler::emit_profile_type
• 4da3fb8: 8268261: C2: assert(n != __null) failed: Bad immediate dominator info.
• 05c7697: 8269668: [aarch64] java.library.path not including /usr/lib64
• 37bc75b: 8241768: git needs .gitattributes
• 351cb48: 8225583: Examine the HttpResponse.BodySubscribers for null handling and multiple subscriptions
• 8ae2846: 8232243: Wrong caret position in JTextPane on Windows with a screen resolution > 100%
• ... and 80 more: https://git.openjdk.java.net/jdk11u-dev/compare/d07f6d910bddcc4a9f1b6ddb8f24065c9be91340...master

Your commit was automatically rebased without conflicts.

[openjdk]

@shipilev Pushed as commit 7751352.

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