8290079: Reduce interaction with volatile in static initializer of BigInteger

[rm-gh-8]

Backporting JDK-8290079: Reduce interaction with volatile in static initializer of BigInteger.

BigInteger.powerCache is volatile and should be assigned only once in static initializer.

Ran GHA Sanity Checks (passed) and related test (passed).

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8290079 needs maintainer approval

Issue

• JDK-8290079: Reduce interaction with volatile in static initializer of BigInteger (Enhancement - P4 - Requested)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk17u-dev.git pull/4191/head:pull/4191
$ git checkout pull/4191

Update a local copy of the PR:
$ git checkout pull/4191
$ git pull https://git.openjdk.org/jdk17u-dev.git pull/4191/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 4191

View PR using the GUI difftool:
$ git pr show -t 4191

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk17u-dev/pull/4191.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

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[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]

⚠️ @rm-gh-8 This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[mlbridge]

Webrevs

• 00: Full (f187c194)

[rm-gh-8]

/approval request for backport of JDK-8290079: Reduce interaction with volatile in static initializer of BigInteger.

Ran the related tests:

(Passed) - make test TEST=test/jdk/java/math/BigInteger

Results are attached.
macos-aarch64-specific-test.log

[openjdk]

@rm-gh-8
8290079: The approval request has been created successfully.