8320276: Improve class initialization barrier in TemplateTable::_new

[MattAlp]

This PR backports 8320276 to support backporting 8338379, see the comment thread linked below. This was a clean backport, though reviewers may want to confirm that the decision to include this function was correct.

---

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-8320276 needs maintainer approval

Issue

• JDK-8320276: Improve class initialization barrier in TemplateTable::_new (Enhancement - P4)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk17u-dev.git pull/3508/head:pull/3508
$ git checkout pull/3508

Update a local copy of the PR:
$ git checkout pull/3508
$ git pull https://git.openjdk.org/jdk17u-dev.git pull/3508/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 3508

View PR using the GUI difftool:
$ git pr show -t 3508

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk17u-dev/pull/3508.diff

---

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-8320276 needs maintainer approval

Issue

• JDK-8320276: Improve class initialization barrier in TemplateTable::_new (Enhancement - P4)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk17u-dev.git pull/3508/head:pull/3508
$ git checkout pull/3508

Update a local copy of the PR:
$ git checkout pull/3508
$ git pull https://git.openjdk.org/jdk17u-dev.git pull/3508/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 3508

View PR using the GUI difftool:
$ git pr show -t 3508

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk17u-dev/pull/3508.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back MattAlp! 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.

[MattAlp]

This is in support of #3317, see #3317 (comment)

[mlbridge]

Webrevs

• 00: Full (f19121cc)

[jbachorik]

This looks wrong.
The original patch has a different change: openjdk/jdk@409a39e#diff-0e8cad40dc55410beb083852ab7a431d0c0cd668719b3c252c93c5083b824654R85-R94

[jbachorik]

Please, review the change to vm_version_ppc.hpp - it seems out of place.

For the rest of changes - I have verified they correspond to the original patch.

[jbachorik]

/label hotspot

[openjdk]

@jbachorik
The label hotspot is not a valid label.
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