8274560: JFR: Add test for OldObjectSample event when using Shenandoah

[shipilev]

Clean backport to improve Shenandoah testing.

Additional testing:

• Linux x86_64 fastdebug jdk/jfr/event/oldobject passes

---

Progress

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

Issue

• JDK-8274560: JFR: Add test for OldObjectSample event when using Shenandoah

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk17u pull/255/head:pull/255
$ git checkout pull/255

Update a local copy of the PR:
$ git checkout pull/255
$ git pull https://git.openjdk.java.net/jdk17u pull/255/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 255

View PR using the GUI difftool:
$ git pr show -t 255

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk17u/pull/255.diff

[bridgekeeper]

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[openjdk]

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

[openjdk]

@shipilev 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:

8274560: JFR: Add test for OldObjectSample event when using Shenandoah

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 1 new commit pushed to the master branch:

• 193c7f1: 8274501: c2i entry barriers read int as long on AArch64

Please see this link for an up-to-date comparison between the source branch of this pull request and the master branch.
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.

[mlbridge]

Webrevs

• 00: Full (43da9608)

[shipilev]

Got the push approval.

/integrate

[openjdk]

Going to push as commit ff4f533.
Since your change was applied there have been 3 commits pushed to the master branch:

• 23b4496: 8268927: Windows: link error: unresolved external symbol "int __cdecl convert_to_unicode(char const *,wchar_t * *)"
• a1036ef: 8274606: Fix jaxp/javax/xml/jaxp/unittest/transform/SurrogateTest.java test
• 193c7f1: 8274501: c2i entry barriers read int as long on AArch64

Your commit was automatically rebased without conflicts.

[openjdk]

@shipilev Pushed as commit ff4f533.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.