Remove duplicated DynComp code; update reflection-util to 1.1.6

[markro49]

Addresses the two "cleanup / reuse" findings from the PR 685 review. No behavior change is intended.

Five commits, each of which builds and passes the unit tests on its own.

Update reflection-util to 1.1.6

For Signatures.binaryNameToInternalForm, which the third commit needs. This commit touches only java/lib/; no source changes are required.

2.0.0 also has that method, but requires Java 17, and Daikon still builds and tests on Java 11. (2.0.0 also renames ReflectionPlume to ReflectionP, which 1.1.6 does not.)

Share the instrumentation exclusion policy

isClassnameInstrumented, is_transformer and junitTestClasses each existed twice, once per instrumenter. An exclusion added to only one copy would silently change comparability depending on which instrumenter ran. They now live in Premain, which already owns most of what the policy consults (problem_packages, problem_classes, jdk_instrumented) and compiles on every supported JDK, unlike DCInstrument24.

Three things worth a reviewer's attention:

• The shared method's classname parameter is @ClassGetName, which accepts a @BinaryName too, since the latter is a subtype. The two instrumenters hold the name in those different forms, and every test in the body behaves identically for both on the non-array names it sees.
• It takes the caller's debugHandleInvoke and debugInstrument rather than adopting logging of its own, so flipping either instrumenter's debug switch produces exactly the output it did before.
• The copies had one real difference: the set_class_initialized rule, present only in DCInstrument24. That is deliberate, not drift. DCInstrument24 adds the call before it walks the method body, so its handleInvoke sees it; DCInstrument adds it to the already-instrumented <clinit>, so its handleInvoke never does. The rule is carried into the shared version with a comment saying it is inert, not wrong, for DCInstrument.

junitTestClasses was two static fields holding the same state, one of them a plain HashSet. It is now a single concurrent set: it describes the target program rather than the instrumentation strategy, and only one instrumenter is active in a JVM.

Use Signatures for internal-form/binary-name conversion

The instrumenter was calling chicory.Runtime for these, while Instrument24 and BuildJDK24 already used Signatures for the identical conversion. Runtime's copies had no other callers.

Delete the copied-code block from chicory.Runtime

That block existed so Runtime would not depend on org.plumelib, which would be instrumented. The shaded daikon.plumelib package already solves that, and plume-import-check explicitly directs code here to use it, so the copies were obsolete. DaikonVariableInfo was already importing daikon.plumelib.reflection.Signatures while still calling Runtime.classGetNameToBinaryName for one call.

fieldDescriptorToBinaryName had no callers at all. classGetNameToBinaryName had three and escapeJava two; those now use Signatures and StringsPlume. I confirmed nothing emits these names into instrumented bytecode.

Verification

make compile, make JAVA24=1 junit (105 + 13), make check-format, make plume-import-check, and javadoc -Xdoclint:all all clean at every commit. The split was rebuilt from master rather than sliced from a combined diff, and the result was diffed against the unsplit tree to confirm it is identical.

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📝 Walkthrough

Walkthrough

The change replaces copied reflection and string utilities with shared Plumelib APIs. It removes the corresponding helpers from Runtime and updates reflection-util to version 1.1.6. It moves JUnit class tracking, transformer detection, and class-instrumentation decisions into Premain. Instrumentation consumers delegate to these shared helpers.

Merge Risk: 🟡 Moderate · up to dd6b1

The dependency declaration may not match the intended shared-API and Java compatibility contract, so the change should not merge until that version mismatch is corrected or explicitly accepted.

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	Docstring coverage is 96.55% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 29 functions across 12 files.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

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Inline comments:
In `@java/lib/build.gradle`:
- Line 15: Align the reflection-util dependency and documentation with the
migrated ReflectionP API and supported Java version: update both
java/lib/build.gradle lines 15-15 and java/lib/README lines 107-108 to a version
that exports ReflectionP while preserving Java 8 compatibility, or consistently
adopt version 2.0.0 and its Java 17 requirement at both sites.

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[mernst]

Thanks!