[tests] Use blittable RegisterNatives in JNI callback tests#12019
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simonrozsival merged 2 commits intoJul 9, 2026
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RegisterNativeMethods_JniNativeMethodRegistration and
RegisterNativeMethods_JniNativeMethodRegistration_ManyMethods exercise the
JniNativeMethodRegistration[] RegisterNatives path, which marshals managed
delegates and requires dynamic code (IL3050) - unsupported under the trimmable
typemap and NativeAOT, where native registration goes through the runtime
registerNatives path instead.
Add [Category ("NativeAOTIgnore")] and [Category ("TrimmableTypeMapUnsupported")]
so TestInstrumentation excludes them on NativeAOT (PublishAot) and trimmable
typemap runs, matching the other unsupported Java.Interop tests.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Pull request overview
This PR updates Java.Interop test metadata so two JniNativeMethodRegistration[] RegisterNatives tests can be excluded in NativeAOT/trimmable scenarios where delegate marshaling requires dynamic code and is not supported.
Changes:
- Add
NativeAOTIgnorecategory to twoJniNativeMethodRegistration[]registration tests. - Add
TrimmableTypeMapUnsupportedcategory to the same tests.
Show a summary per file
| File | Description |
|---|---|
| external/Java.Interop/tests/Java.Interop-Tests/Java.Interop/JniTypeTest.cs | Adds NUnit categories to skip the JniNativeMethodRegistration[] registration-path tests under specific runtimes/configurations. |
Copilot's findings
- Files reviewed: 1/1 changed files
- Comments generated: 2
Keep the RegisterNatives coverage enabled under NativeAOT by switching the affected tests from JniNativeMethodRegistration[] delegate marshaling to the blittable JniNativeMethod span overload with UnmanagedCallersOnly function pointers. This avoids the dynamic-code requirement while preserving the single-method and many-method registration coverage. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
simonrozsival
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simonrozsival
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trimmable-type-map
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jonathanpeppers
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Jul 9, 2026
simonrozsival
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Summary
Tiny test-only split from #11822.
Instead of disabling the
RegisterNativeMethods_JniNativeMethodRegistration*coverage on trimmable NativeAOT, this updates those tests to use the NativeAOT-compatible path:ManagedAddis now[UnmanagedCallersOnly].RegisterNatives(JniObjectReference, ReadOnlySpan<JniNativeMethod>)overload with raw function pointers.JniNativeMethodRegistration[]delegate marshaling.Testing
dotnet test external/Java.Interop/tests/Java.Interop-Tests/Java.Interop-Tests.csproj --filter 'FullyQualifiedName~JniTypeTest.RegisterNativeMethods_JniNativeMethod'could not run in the temporary worktree because Java tool resolution failed before compiling tests (Java.Interop.targets: empty javac command, exit 127).Notes
Extracted from #11822 to keep the NativeAOT default flip focused.