8316428: G1: Nmethod count statistics only count last code root set iterated

[jianglizhou]

Auto suggested description:
This pull request contains a backport of commit fab372d3 from the openjdk/jdk repository.

The commit being backported was authored by Thomas Schatzl on 19 Sep 2023 and was reviewed by Ivan Walulya and Albert Mingkun Yang.

---

Progress

• Change must not contain extraneous whitespace
• JDK-8316428 needs maintainer approval
• Commit message must refer to an issue

Issue

• JDK-8316428: G1: Nmethod count statistics only count last code root set iterated (Bug - P4)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u.git pull/458/head:pull/458
$ git checkout pull/458

Update a local copy of the PR:
$ git checkout pull/458
$ git pull https://git.openjdk.org/jdk21u.git pull/458/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 458

View PR using the GUI difftool:
$ git pr show -t 458

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk21u/pull/458.diff

Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back jiangli! 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]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

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

[openjdk]

⚠️ @jianglizhou This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[mlbridge]

Webrevs

• 00: Full (666ac941)

[GoeLin]

Hi @jianglizhou
please backport this to repo jdk21u-dev. jdk21u is used only for rampdown.
Please close this PR.

[jianglizhou]

Done. New PR: openjdk/jdk21u-dev#1096. Thanks