8254565: JFR: Incorrect verification of mirror events

[egahlin]

Hi,

Could I have a review of a fix that improves the verification of mirror events.

Mirror events is an internal mechanism used by JDK events that can't depend on the jdk.jfr module, today only events defined in java.base. The verification is a sanity check to make sure the field layout of the event and the mirror does not differ. The verification now verifies field type and it handles the unlikely case somebody adds a field to java.lang.Object (for experimentation) by always walking the whole class hierarchy of the mirror.

Testing: jdk/jdk/jfr

Thanks
Erik

---

Progress

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Issue

• JDK-8254565: JFR: Incorrect verification of mirror events

Reviewers

• Markus Grönlund (@mgronlun - Reviewer)

Reviewing

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[mlbridge]

Webrevs

• 00: Full (7a053a85)

[openjdk]

@egahlin 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:

8254565: JFR: Incorrect verification of mirror events

Reviewed-by: mgronlun

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 19 new commits pushed to the master branch:

• 7146104: 8265421: java/lang/String/StringRepeat.java test is missing a memory requirement
• b5c92ca: 8265106: IGV: Enforce en-US locale while parsing ideal graph
• 3de0dcb: 8265483: All-caps “JAVA” in the top navigation bar
• 739769c: 8265411: Avoid unnecessary Method::init_intrinsic_id calls
• a22ad03: 8264983: Add gtest for JDK-8264008
• 91b08b7: 8261779: JCK test api/javax_crypto/EncryptedPrivateKeyInfo/Ctor4.html is failing with assertion error when assertions enabled
• 2fcd920: 8261183: Follow on to Make lists of normal filenames
• 40ef00c: 8258457: testlibrary_tests/ctw/JarDirTest.java fails with InvalidPathException on windows
• 3f0da35: 8261392: Exclude testlibrary_tests/ctw/JarDirTest.java
• 8d0faaf: 8257001: Improve Http Client Support
• ... and 9 more: https://git.openjdk.java.net/jdk/compare/d61345984d56cc46161ffea097afbd899081f3cf...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.

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[egahlin]

/integrate

[openjdk]

@egahlin Since your change was applied there have been 31 commits pushed to the master branch:

• f45d460: 8265017: runtime/HiddenClasses/StressHiddenClasses.java timed out on Win* OCI
• 0136c89: 8265490: Unterminated string passed to FindClass() in hotspot test
• 325edbc: 8265450: Merge PreservedMarksSet::restore code paths
• b337f63: 8037397: RegEx pattern matching loses character class after intersection (&&) operator
• 07a7510: 8200145: Conditional expression mistakenly treated as standalone
• 41fc7dd: 8199079: Test javax/swing/UIDefaults/6302464/bug6302464.java is unstable
• 45c474a: 8168408: Test java/awt/Focus/ActualFocusedWindowTest/ActualFocusedWindowBlockingTest.java fails intermittentently on windows
• 18ee419: 8198422: Test java/awt/font/StyledMetrics/BoldSpace.java is unstable
• da86029: 8265326: Strange Characters in G1GC GC Log
• 7879adb: 8265343: Update Debian-based cross-compilation recipes
• ... and 21 more: https://git.openjdk.java.net/jdk/compare/d61345984d56cc46161ffea097afbd899081f3cf...master

Your commit was automatically rebased without conflicts.

Pushed as commit 7116321.

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