8373122: JFR build failure with CDS disabled due to -Werror=unused-function after JDK-8365400

[shqking]

Hi all,

This pull request contains a backport of commit e1d81c09 from the openjdk/jdk repository.

The commit being backported was authored by Hao Sun on 23 Dec 2025 and was reviewed by Markus Grönlund, Jie Fu and Francesco Andreuzzi.

Thanks!

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8373122: JFR build failure with CDS disabled due to -Werror=unused-function after JDK-8365400 (Bug - P3)

Reviewers

• Francesco Andreuzzi (@fandreuz - Committer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/28976/head:pull/28976
$ git checkout pull/28976

Update a local copy of the PR:
$ git checkout pull/28976
$ git pull https://git.openjdk.org/jdk.git pull/28976/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 28976

View PR using the GUI difftool:
$ git pr show -t 28976

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/28976.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back haosun! A progress list of the required criteria for merging this PR into jdk26 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]

@shqking The following label will be automatically applied to this pull request:

• hotspot-jfr

When this pull request is ready to be reviewed, an "RFR" email will be sent to the corresponding mailing list. If you would like to change these labels, use the /label pull request command.

[mlbridge]

Webrevs

• 00: Full (4e1a0412)

[shqking]

/label add build

[openjdk]

@shqking
The build label was successfully added.

[shqking]

GHA test linux-x64/build failed. I don't think it's related to this patch. I noticed that this GHA test failed in several other PRs.

[shqking]

Hi, I would appreciate it if you could help review this backport patch again. Thanks.

@fandreuz @DamonFool and @mgronlun