8264540: WhiteBox.metaspaceReserveAlignment should return shared region alignment

[yminqi]

Hi, Please review
After JDK-8236847, the shared region alignment (new as MetaspaceShared::core_region_alignment) is no longer default to os pagesize, it is a configurable value at build time instead. The WhiteBox api metaspaceReserveAlignment() should reflect the change.

Tests:tier1,tier2,tier3,tier4

---

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Issue

• JDK-8264540: WhiteBox.metaspaceReserveAlignment should return shared region alignment

Reviewers

• Calvin Cheung (@calvinccheung - Reviewer)
• Ioi Lam (@iklam - Reviewer)

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• 02: Full - Incremental (155b3b7d)
• 01: Full - Incremental (f99b1c90)
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[calvinccheung]

Looks good. Just one comment in one of the test changes.

[openjdk]

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

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

8264540: WhiteBox.metaspaceReserveAlignment should return shared region alignment

Reviewed-by: ccheung, iklam

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At the time when this comment was updated there had been 33 new commits pushed to the master branch:

• 104e925: 8264512: jdk/test/jdk/java/util/prefs/ExportNode.java relies on default platform encoding
• a0ec2cb: 8248862: Implement Enhanced Pseudo-Random Number Generators
• 39719da: 8253266: JList and JTable constructors should clear OPAQUE_SET before calling updateUI
• a8005ef: 8166727: javac crashed: [jimage.dll+0x1942] ImageStrings::find+0x28
• 7f9ece2: 8264650: Cross-compilation to macos/aarch64
• 0039c18: 8264475: CopyArea ignores clip state in metal rendering pipeline
• f084bd2: 8262355: Support for AVX-512 opmask register allocation.
• 0780666: 8254050: HotSpot Style Guide should permit using the "override" virtual specifier
• f259eea: 8264393: JDK-8258284 introduced dangling TLH race
• 9b2232b: 8264123: add ThreadsList.is_valid() support
• ... and 23 more: https://git.openjdk.java.net/jdk/compare/c04a743bd43946ee88862be83f205a7bdcb6d0f4...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.

[yminqi]

@calvinccheung @iklam Thanks for review!

[yminqi]

/integrate

[openjdk]

@yminqi Since your change was applied there have been 33 commits pushed to the master branch:

• 104e925: 8264512: jdk/test/jdk/java/util/prefs/ExportNode.java relies on default platform encoding
• a0ec2cb: 8248862: Implement Enhanced Pseudo-Random Number Generators
• 39719da: 8253266: JList and JTable constructors should clear OPAQUE_SET before calling updateUI
• a8005ef: 8166727: javac crashed: [jimage.dll+0x1942] ImageStrings::find+0x28
• 7f9ece2: 8264650: Cross-compilation to macos/aarch64
• 0039c18: 8264475: CopyArea ignores clip state in metal rendering pipeline
• f084bd2: 8262355: Support for AVX-512 opmask register allocation.
• 0780666: 8254050: HotSpot Style Guide should permit using the "override" virtual specifier
• f259eea: 8264393: JDK-8258284 introduced dangling TLH race
• 9b2232b: 8264123: add ThreadsList.is_valid() support
• ... and 23 more: https://git.openjdk.java.net/jdk/compare/c04a743bd43946ee88862be83f205a7bdcb6d0f4...master

Your commit was automatically rebased without conflicts.

Pushed as commit d920f85.

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