8390874: MethodData::extra_data_lock memory leak

[synecdoche]

Description

This change deletes C heap allocated Mutex objects associated with MethodData instances, which fixes a slow leak when MethodData instances are deallocated.

This was not a clean backport due to the removal of JVMCI upstream. MethodData::release_C_heap_structures() was empty upstream but contains the line FailedSpeculation::free_failed_speculations(get_failed_speculations_address()); in this code base. I added the Mutex deletion after the JVMCI code.

Testing

No tier 1 regressions. Tested with:

• Linux x86_64 fastdebug
• Linux x86_64 release

---

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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
• JDK-8390874 needs maintainer approval

Issue

• JDK-8390874: MethodData::extra_data_lock memory leak (Bug - P2)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk25u-dev.git pull/769/head:pull/769
$ git checkout pull/769

Update a local copy of the PR:
$ git checkout pull/769
$ git pull https://git.openjdk.org/jdk25u-dev.git pull/769/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 769

View PR using the GUI difftool:
$ git pr show -t 769

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk25u-dev/pull/769.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back synecdoche! 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.

[mlbridge]

Webrevs

• 00: Full (16fb2abf)