8208249: TriggerUnloadingByFillingMetaspace generates garbage class names

[GoeLin]

I backport this for parity with 11.0.16-oracle.

---

Progress

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

Issue

• JDK-8208249: TriggerUnloadingByFillingMetaspace generates garbage class names

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk11u-dev pull/858/head:pull/858
$ git checkout pull/858

Update a local copy of the PR:
$ git checkout pull/858
$ git pull https://git.openjdk.java.net/jdk11u-dev pull/858/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 858

View PR using the GUI difftool:
$ git pr show -t 858

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk11u-dev/pull/858.diff

[bridgekeeper]

👋 Welcome back goetz! 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 backport pull request has now been updated with issue and summary from the original commit.

[openjdk]

@GoeLin This change now passes all automated pre-integration checks.

After integration, the commit message for the final commit will be:

8208249: TriggerUnloadingByFillingMetaspace generates garbage class names

Put a ThreadLocal around the object to be thread safe

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 no new commits pushed to the master branch. If another commit should be pushed before you perform the /integrate command, your PR will be automatically rebased. If you prefer to avoid any potential automatic rebasing, please check the documentation for the /integrate command for further details.

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[mlbridge]

Webrevs

• 00: Full (e2a8c3ee)

[GoeLin]

Pre-submit failures: some build dependencies were missing. Unrelated.

[GoeLin]

/integrate

[openjdk]

Going to push as commit 571d323.
Since your change was applied there have been 7 commits pushed to the master branch:

• 87b6007: 8279837: C2: assert(is_Loop()) failed: invalid node class: Region
• 56e2384: 8208246: flags duplications in vmTestbase_vm_g1classunloading tests
• 7a1d1e0: Merge
• 1cff563: 8277795: ldap connection timeout not honoured under contention
• e339111: 8276141: XPathFactory set/getProperty method
• b0c0dc5: 8275082: Update XML Security for Java to 2.3.0
• 4b9bba6: 8276990: Memory leak in invoker.c fillInvokeRequest() during JDI operations

Your commit was automatically rebased without conflicts.

[openjdk]

@GoeLin Pushed as commit 571d323.

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