8275150: URLClassLoaderTable should store OopHandle instead of Handle

[calvinccheung]

Please review this small patch for storing the URLClassLoader as OopHandle instead of Handle.
It is to avoid running into the same issue as in JDK-8274753.

Passed tiers 1 and 2 tests.

---

Progress

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

Issue

• JDK-8275150: URLClassLoaderTable should store OopHandle instead of Handle

Reviewers

• Stefan Karlsson (@stefank - Reviewer)
• Yumin Qi (@yminqi - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk pull/5972/head:pull/5972
$ git checkout pull/5972

Update a local copy of the PR:
$ git checkout pull/5972
$ git pull https://git.openjdk.java.net/jdk pull/5972/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 5972

View PR using the GUI difftool:
$ git pr show -t 5972

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk/pull/5972.diff

[calvinccheung]

/label add hotspot-runtime

[bridgekeeper]

👋 Welcome back ccheung! 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]

@calvinccheung
The hotspot-runtime label was successfully added.

[mlbridge]

Webrevs

• 00: Full (d14baed0)

[stefank]

Looks good. Thanks for fixing.

[openjdk]

@calvinccheung 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:

8275150: URLClassLoaderTable should store OopHandle instead of Handle

Reviewed-by: stefank, minqi

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 38 new commits pushed to the master branch:

• 72a976e: 8266936: Add a finalization JFR event
• bcbe384: 8269175: [macosx-aarch64] wrong CPU speed in hs_err file
• 426bcee: 8275360: Use @OverRide in javax.annotation.processing
• 4d383b9: 8275298: Remove unnecessary weak_oops_do call in adjust weak roots phase
• fb8e5cf: 8275368: Correct statement of kinds of elements Processor.process operates over
• d548f2f: 8274346: Support for additional content in an app-image.
• a619f89: 8274721: UnixSystem fails to provide uid, gid or groups if no username is available
• 1afddb2: 8275322: Change nested classes in java.management to static nested classes
• 45ebf85: 8275333: Print count in "Too many recored phases?" assert
• ebb1363: 8251513: Code around Parse::do_lookupswitch/do_tableswitch should be cleaned up
• ... and 28 more: https://git.openjdk.java.net/jdk/compare/d9e03e42afbb2e5115b67accfffad4938b8314b1...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]

LGTM.

[calvinccheung]

Thanks @stefank and @yminqi for the review.
/integrate

[openjdk]

Going to push as commit bad75e6.
Since your change was applied there have been 38 commits pushed to the master branch:

• 72a976e: 8266936: Add a finalization JFR event
• bcbe384: 8269175: [macosx-aarch64] wrong CPU speed in hs_err file
• 426bcee: 8275360: Use @OverRide in javax.annotation.processing
• 4d383b9: 8275298: Remove unnecessary weak_oops_do call in adjust weak roots phase
• fb8e5cf: 8275368: Correct statement of kinds of elements Processor.process operates over
• d548f2f: 8274346: Support for additional content in an app-image.
• a619f89: 8274721: UnixSystem fails to provide uid, gid or groups if no username is available
• 1afddb2: 8275322: Change nested classes in java.management to static nested classes
• 45ebf85: 8275333: Print count in "Too many recored phases?" assert
• ebb1363: 8251513: Code around Parse::do_lookupswitch/do_tableswitch should be cleaned up
• ... and 28 more: https://git.openjdk.java.net/jdk/compare/d9e03e42afbb2e5115b67accfffad4938b8314b1...master

Your commit was automatically rebased without conflicts.

[openjdk]

@calvinccheung Pushed as commit bad75e6.

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