8285699: riscv: Provide information when hitting a HaltNode

[zhengxiaolinX]

Backport one Yadong's patch, which can cleanup some RVC things.

Tested along with other patches, hotspot tier1~4 with fastdebug build.

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Progress

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

Error

 ⚠️ This PR only contains changes already present in the target

Issue

• JDK-8285699: riscv: Provide information when hitting a HaltNode

Reviewers

• Fei Yang (@RealFYang - Committer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/riscv-port-jdk17u.git pull/21/head:pull/21
$ git checkout pull/21

Update a local copy of the PR:
$ git checkout pull/21
$ git pull https://git.openjdk.org/riscv-port-jdk17u.git pull/21/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 21

View PR using the GUI difftool:
$ git pr show -t 21

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/riscv-port-jdk17u/pull/21.diff

[bridgekeeper]

👋 Welcome back xlinzheng! A progress list of the required criteria for merging this PR into riscv-port 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 from the original commit.

[mlbridge]

Webrevs

• 00: Full (aa00701f)

[RealFYang]

Looks good. Thanks.