[lworld] RFR: 8354728: [lworld] Langtools work to update strict implementation to latest [v3]

[Shaojin Wen]

On Sat, 26 Apr 2025 17:38:13 GMT, Chen Liang <liach at openjdk.org> wrote:

>> The updates to the core libraries + langtools for the latest strict field initialization spec https://cr.openjdk.org/~dlsmith/jep401/jep401-20250409/specs/strict-fields-jvms.html is ready.
>> 
>> Currently, since there is no VM support, testing is restricted to generation by ClassFile API/javac and inspection through ClassFile API (and javap)
>> 
>> Not suitable for integration yet; StrictFinalInstanceFieldsTest requires VM side's support.
>
> Chen Liang has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains six additional commits since the last revision:
> 
>  - Merge branch 'lworld' of https://github.com/openjdk/valhalla into feature/unset-update
>  - Tweaks to let tests pass
>  - Chen comment
>  - 8354694: [lworld] Refactor AssertUnsetFields to Early Larval Frame
>  - Review suggestions, also rollback the getEntryType rename in javac, test updates
>  - 8354728: [lworld] Langtools work to update strict implementation to latest

src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/ClassWriter.java line 1268:

> 1266:                 if (debugstackmap) System.out.print("  " + i + ":");
> 1267:                 StackMapTableFrame frame = code.stackMapTableBuffer[i];
> 1268:                 frame.write(this);

code.stackMapTableBuffer[i].write(this);

This variable is only used once, can it be removed?

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PR Review Comment: https://git.openjdk.org/valhalla/pull/1432#discussion_r2061965442