8370890: Start of release updates for JDK 27

[nizarbenalla]

Get JDK 27 underway.

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change requires CSR request JDK-8371062 to be approved
• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change requires CSR request JDK-8371068 to be approved
• Change requires CSR request JDK-8371071 to be approved

Integration blocker

 ⚠️ Too few reviewers with at least role reviewer found (have 0, need at least 1) (failed with updated jcheck configuration in pull request)

Issues

• JDK-8370890: Start of release updates for JDK 27 (Bug - P4)
• JDK-8370893: Add SourceVersion.RELEASE_27 (Sub-task - P4)
• JDK-8370894: Add source 27 and target 27 to javac (Sub-task - P4)
• JDK-8371071: Add SourceVersion.RELEASE_27 (CSR)
• JDK-8371062: Add source 27 and target 27 to javac (CSR)
• JDK-8371068: Start of release updates for JDK 27 (CSR)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/28130/head:pull/28130
$ git checkout pull/28130

Update a local copy of the PR:
$ git checkout pull/28130
$ git pull https://git.openjdk.org/jdk.git pull/28130/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 28130

View PR using the GUI difftool:
$ git pr show -t 28130

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/28130.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back nbenalla! 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]

@nizarbenalla The following labels will be automatically applied to this pull request:

• build
• compiler
• core-libs
• hotspot-runtime

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

[nizarbenalla]

/issue add 8370893
/issue add 8370894

[openjdk]

@nizarbenalla
Adding additional issue to issue list: 8370893: Add SourceVersion.RELEASE_27.

[openjdk]

@nizarbenalla
Adding additional issue to issue list: 8370894: Add source 27 and target 27 to javac.

[nizarbenalla]

This initial version of the PR intentionally excludes the creation of the new symbol files so that the fundamental code aspects of the update are easier to see.

The GA release date is accurate.
The URL of the JVMLS will be updated in the next commit to be accurate.

[mlbridge]

Webrevs

• 03: Full - Incremental (0652d5d3)
• 02: Full - Incremental (b51f2324)
• 01: Full - Incremental (647904b3)
• 00: Full (cc1a968e)

[jddarcy]

Looks fine so far.

[irisclark]

Expected changes for JDK 27 looking good.

[irisclark]

Anticipated GA date confirmed.