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Remove Java.Runtime.Environment and keep Java.Interop tests running - #1447

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jonathanpeppers merged 34 commits into
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remove-java-runtime-environment
Jun 26, 2026
Merged

Remove Java.Runtime.Environment and keep Java.Interop tests running#1447
jonathanpeppers merged 34 commits into
mainfrom
remove-java-runtime-environment

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@simonrozsival

@simonrozsivalsimonrozsival commented Jun 8, 2026•
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Related to dotnet/android#11843

Summary

  • Remove the standalone src/Java.Runtime.Environment project and the desktop/JRE runtime path it provided.
  • Remove the samples, performance tests, dynamic tests, and Java.Base tests that depended on the old standalone runtime surface.
  • Keep Java.Interop-Tests in the solution and CI, and restore them to a passing state without bringing back the Java.Runtime.Environment assembly.
  • Remove the Java.Runtime.Environment friend-assembly dependency from Java.Interop; keep only the Java.Interop-Tests friend access needed by the restored tests.
  • Trim src/java-interop down to the native source subset still consumed by dotnet/android, while keeping a minimal validation project so those sources continue to compile in this repo.
  • Keep a minimal Hello-NativeAOTFromJNI smoke sample that proves Java can load a NativeAOT library, initialize JniRuntime from an existing JNIEnv*, and call into a native C# method.

Note on tests/TestJVM/TestJVM.cs

This file intentionally grew because it now owns the small amount of JVM-hosting/runtime plumbing that Java.Interop-Tests still need after deleting Java.Runtime.Environment.

The new code is test-only and replaces the old TestJVM : JreRuntime dependency with a direct TestJVM : JniRuntime host. It keeps only the pieces needed by the core tests:

  • JNI_CreateJavaVM loading through NativeLibrary
  • classpath setup for java-interop.jar and interop-test.jar
  • JDK/JVM path discovery from JdkInfo.props or installed JDKs
  • a minimal object reference manager for global/weak-global reference counts
  • a minimal managed value manager for peer registration/lookup/finalization
  • a test type manager for the explicit Java type mappings used by the suite

It deliberately does not reintroduce the old product/runtime API surface such as JreRuntime, JreRuntimeOptions, Mono runtime managers, standalone runtime packaging, reference-log plumbing, or the native java-interop JVM loader path. The restored tests/test host have no remaining Java.Runtime.Environment references.

Note on samples/Hello-NativeAOTFromJNI

The old sample depended on Java.Runtime.Environment, so this PR restores it as a smaller smoke test instead of bringing back the old sample wholesale.

The new sample:

  • publishes a NativeAOT shared library,
  • lets Java load it with System.loadLibrary("Hello-NativeAOTFromJNI"),
  • initializes a sample-local JniRuntime from the existing JNIEnv*, and
  • calls a native C# sayHello() method that returns a Java string.

It does not exercise managed peer construction or generated JCWs; those can be added later with explicit support if we want a broader NativeAOT/JNI sample.

Validation

  • dotnet build -t:Prepare
  • dotnet build src/java-interop/java-interop.csproj
  • dotnet build src/Java.Interop/Java.Interop.csproj --no-restore
  • dotnet build tests/Java.Interop-Tests/Java.Interop-Tests.csproj --no-restore
  • dotnet test tests/Java.Interop-Tests/Java.Interop-Tests.csproj --no-build — 669 passed, 0 failed, 4 skipped
  • dotnet publish -c Release -r osx-arm64 samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj
  • dotnet build -c Release -r osx-arm64 -t:RunJavaSample samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj --no-restore

CopilotAI review requested due to automatic review settings June 8, 2026 10:23
@simonrozsival
Remove Java.Runtime.Environment runtime path
97ce2d3
Remove the standalone JRE runtime project and its sample/test consumers from the Java.Interop submodule. This keeps the core Java.Interop build path while dropping the desktop/JRE-oriented runtime pieces that are not needed by the main Android SDK.
CopilotAI reviewed Jun 8, 2026
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Pull request overview

This PR removes the standalone Java.Runtime.Environment project and its desktop/JRE-oriented test & sample consumers, and updates build/docs metadata to reflect the cleanup and discourage desktop-specific runtime helper usage at the Java.Interop layer.

Changes:

  • Removed src/Java.Runtime.Environment and all dependent test/sample projects that were built around a standalone desktop/JRE runtime.
  • Removed JVM-based test suites and performance/overhead benchmarks that depended on the removed runtime path.
  • Updated JniRuntime.GetAvailableInvocationPointers() obsolete guidance, the repo Makefile, and .github/copilot-instructions.md to align with the new shape.
Show a summary per file
FileDescription
tests/TestJVM/TestJVM.csprojRemoved TestJVM helper project (desktop/JRE runtime dependency).
tests/TestJVM/TestJVM.csRemoved TestJVM helper runtime implementation.
tests/Java.Interop.Dynamic-Tests/Java.Interop/JavaVMFixture.csRemoved Dynamic test fixture relying on TestJVM/JRE runtime.
tests/Java.Interop.Dynamic-Tests/Java.Interop/DynamicJavaInstanceTests.csRemoved Dynamic JVM-based test coverage.
tests/Java.Interop.Dynamic-Tests/Java.Interop/DynamicJavaClassTests.csRemoved Dynamic JVM-based test coverage.
tests/Java.Interop.Dynamic-Tests/Java.Interop.Dynamic-Tests.csprojRemoved Dynamic test project and its JRE runtime references.
tests/Java.Interop-Tests/java/net/dot/jni/test/TestType.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/SelfRegistration.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassDerived.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassBase2.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassBase1.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RegisterNativesTestType.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/ObjectHelper.javaRemoved Java-side helper used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/MyJavaInterfaceImpl.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/JavaInterface.javaRemoved Java-side interface used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/GetThis.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/DesugarAndroidInterface$_CC.javaRemoved Java-side desugar test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CrossReferenceBridge.javaRemoved Java-side GC bridge/cross-ref test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallVirtualFromConstructorDerived.javaRemoved Java-side constructor-virtual-call test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallVirtualFromConstructorBase.javaRemoved Java-side constructor-virtual-call test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualDerived2.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualDerived.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualBase.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/AnotherJavaInterfaceImpl.javaRemoved Java-side interface impl used by tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/AndroidInterface.javaRemoved Java-side interface used for desugar-related tests.
tests/Java.Interop-Tests/Java.Interop/TestTypeTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/SelfRegistrationTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/SelfRegistration.csRemoved managed type used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/MethodBindingTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniValueMarshalerAttributeTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTypeSignatureTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTypeSignatureAttributeTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTransitionTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntimeTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntime.JniValueManagerTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntime.JniTypeManagerTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniReferenceSafeHandleTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniMarshalTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniInstanceMethodIDTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniEnvironmentTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JavaVMFixture.Partial.csRemoved JVM fixture scaffolding.
tests/Java.Interop-Tests/Java.Interop/JavaVMFixture.csRemoved JVM fixture setup & type-manager mapping logic.
tests/Java.Interop-Tests/Java.Interop/JavaSingleArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaSByteArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaPrimitiveArrayContract.csRemoved JVM-based contract test base class.
tests/Java.Interop-Tests/Java.Interop/JavaPeerableExtensionsTests.csRemoved JVM-based extension tests and related managed bindings.
tests/Java.Interop-Tests/Java.Interop/JavaObjectExtensionsTests.csRemoved JVM-based extension tests.
tests/Java.Interop-Tests/Java.Interop/JavaObjectArrayTest.csRemoved JVM-based object array contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaManagedGCBridgeTests.csRemoved JVM-based GC bridge tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt64ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt32ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt16ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaExceptionTests.csRemoved JVM-based exception interop tests.
tests/Java.Interop-Tests/Java.Interop/JavaDoubleArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaCharArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaBooleanArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaArrayContract.csRemoved JVM-based contract test base class.
tests/Java.Interop-Tests/Java.Interop/InvokeVirtualFromConstructorTests.csRemoved JVM-based constructor dispatch tests.
tests/Java.Interop-Tests/Java.Interop/GetThis.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/FinalizerHelpers.csRemoved helper used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallVirtualFromConstructorDerived.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallVirtualFromConstructorBase.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualDerived2.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualDerived.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualBase.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop-Tests.targetsRemoved MSBuild logic for building interop-test.jar and JCWs.
tests/Java.Interop-Tests/Java.Interop-Tests.csprojRemoved JVM-based Java.Interop test project.
tests/Java.Interop-Tests/Cadenza/BaseRocksFixture.csRemoved Cadenza test fixture that depended on JavaVMFixture.
tests/Java.Interop-Tests/Cadenza.Collections/ListContract.csRemoved Cadenza collection contract tests.
tests/Java.Interop-Tests/Cadenza.Collections/EnumerableContract.csRemoved Cadenza enumerable contract tests.
tests/Java.Interop-PerformanceTests/java/com/xamarin/interop/performance/JavaTiming.javaRemoved Java-side performance benchmark fixture.
tests/Java.Interop-PerformanceTests/Java.Interop/JavaVMFixture.csRemoved perf test fixture relying on TestJVM.
tests/Java.Interop-PerformanceTests/Java.Interop/JavaPrimitiveArraysTiming.csRemoved perf tests and benchmark helpers.
tests/Java.Interop-PerformanceTests/Java.Interop-PerformanceTests.targetsRemoved perf test JAR build target.
tests/Java.Interop-PerformanceTests/Java.Interop-PerformanceTests.csprojRemoved performance test project.
tests/Java.Base-Tests/java/net/dot/jni/test/PublicInterface.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/net/dot/jni/test/InterfaceMethodInheritance.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/net/dot/jni/test/HasInterfaceMethodInheritance.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/com/microsoft/java_base_tests/Invoker.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/Java.Base/NestedTypeTests.csRemoved Java.Base JVM-based tests.
tests/Java.Base-Tests/Java.Base/JniRuntimeJniValueManagerContractExtras.csRemoved Java.Base JVM-based tests.
tests/Java.Base-Tests/Java.Base/JavaVMFixture.Partial.csRemoved Java.Base test fixture scaffolding.
tests/Java.Base-Tests/Java.Base/JavaVMFixture.csRemoved Java.Base fixture setup using TestJVM.
tests/Java.Base-Tests/Java.Base/JavaToManagedTests.csRemoved Java→managed callback tests.
tests/Java.Base-Tests/Java.Base/InterfaceMethodInheritanceTests.csRemoved interface inheritance tests.
tests/Java.Base-Tests/Java.Base-Tests.targetsRemoved Java.Base test targets.
tests/Java.Base-Tests/Java.Base-Tests.csprojRemoved Java.Base test project.
tests/invocation-overhead/README.mdRemoved standalone invocation-overhead benchmark documentation.
tests/invocation-overhead/MakefileRemoved invocation-overhead build helpers.
tests/invocation-overhead/invocation-overhead.targetsRemoved invocation-overhead MSBuild targets.
tests/invocation-overhead/invocation-overhead.csprojRemoved invocation-overhead benchmark project.
src/Java.Runtime.Environment/Properties/AssemblyInfo.csRemoved standalone runtime assembly configuration.
src/Java.Runtime.Environment/Java.Runtime.Environment.targetsRemoved standalone runtime MSBuild logic.
src/Java.Runtime.Environment/Java.Runtime.Environment.dll.config.inRemoved template for dllmap config generation.
src/Java.Runtime.Environment/Java.Runtime.Environment.csprojRemoved standalone runtime project.
src/Java.Runtime.Environment/Java.Interop/JreTypeManager.csRemoved JRE-specific type manager implementation.
src/Java.Runtime.Environment/.gitignoreRemoved ignore entry for generated runtime config.
src/Java.Interop/Properties/AssemblyInfo.csRemoved InternalsVisibleTo entries for deleted assemblies/tests.
src/Java.Interop/Java.Interop/JniRuntime.csUpdated obsolete guidance to avoid referencing removed desktop runtime helpers.
samples/Hello-NativeAOTFromJNI/README.mdRemoved desktop/JRE-oriented sample docs.
samples/Hello-NativeAOTFromJNI/NativeAotTypeManager.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/ManagedType.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/JavaInteropRuntime.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/JavaCallableAttributes.csRemoved sample-only callable attribute definitions.
samples/Hello-NativeAOTFromJNI/java/net/dot/jni/hello/JavaInteropRuntime.javaRemoved Java launcher/runtime sample code.
samples/Hello-NativeAOTFromJNI/java/net/dot/jni/hello/App.javaRemoved Java launcher sample code.
samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targetsRemoved sample build targets (JCW + jar).
samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csprojRemoved NativeAOT-from-JNI sample project.
samples/Hello-NativeAOTFromJNI/App.csRemoved sample native entrypoint code.
samples/Hello-NativeAOTFromAndroid/Transforms/Metadata.xmlRemoved Android NativeAOT sample transform metadata.
samples/Hello-NativeAOTFromAndroid/settings.gradleRemoved Android NativeAOT Gradle settings.
samples/Hello-NativeAOTFromAndroid/NativeAotTypeManager.csRemoved Android NativeAOT sample type manager.
samples/Hello-NativeAOTFromAndroid/MainActivity.csRemoved Android NativeAOT managed activity sample.
samples/Hello-NativeAOTFromAndroid/LogcatTextWriter.csRemoved Android NativeAOT logging helper.
samples/Hello-NativeAOTFromAndroid/JavaInteropRuntime.csRemoved Android NativeAOT runtime init code.
samples/Hello-NativeAOTFromAndroid/Hello-NativeAOTFromAndroid.csprojRemoved Android NativeAOT sample project.
samples/Hello-NativeAOTFromAndroid/gradle.propertiesRemoved Android NativeAOT sample config.
samples/Hello-NativeAOTFromAndroid/build.gradleRemoved Android NativeAOT sample build script.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/values/strings.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/layout/activity_main.xmlRemoved Android sample layout.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/drawable/ic_launcher_background.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/drawable-v24/ic_launcher_foreground.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/NativeAotRuntimeProvider.javaRemoved Android sample Java bootstrapping.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/JavaMainActivity.javaRemoved Android sample Java activity.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/JavaInteropRuntime.javaRemoved Android sample Java runtime loader.
samples/Hello-NativeAOTFromAndroid/app/src/main/AndroidManifest.xmlRemoved Android sample manifest.
samples/Hello-NativeAOTFromAndroid/app/proguard-rules.proRemoved Android sample ProGuard rules.
samples/Hello-NativeAOTFromAndroid/app/build.gradleRemoved Android sample module build script.
samples/Hello-NativeAOTFromAndroid/app/.gitignoreRemoved Android sample ignores.
samples/Hello-NativeAOTFromAndroid/android.xmlRemoved Android sample API XML input.
samples/Hello-NativeAOTFromAndroid/.gitignoreRemoved Android sample ignores.
samples/Hello-Java.Base/Program.csRemoved desktop/JRE-oriented sample program.
samples/Hello-Java.Base/Hello-Java.Base.csprojRemoved desktop/JRE-oriented sample project.
samples/Hello-Core/README.mdRemoved desktop/JRE-oriented sample docs.
samples/Hello-Core/Program.csRemoved desktop/JRE-oriented sample program.
samples/Hello-Core/Hello-Core.csprojRemoved desktop/JRE-oriented sample project.
MakefileUpdated build metadata, but currently still references removed test outputs (needs further adjustment).
.github/copilot-instructions.mdUpdated repository guidance to reflect removed runtime/tests and updated validation commands.

Copilot's findings

  • Files reviewed: 162/178 changed files
  • Comments generated: 1

Comment threadMakefile Outdated
@simonrozsival
simonrozsivalforce-pushed the remove-java-runtime-environment branch from 1723d75 to 58ec716CompareJune 8, 2026 10:33
@simonrozsival
Fix Makefile test targets after JRE cleanup
a18c60f
Update the Makefile test lists to match the remaining managed test projects and stop building removed desktop/JRE test outputs.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@simonrozsival

simonrozsival commented Jun 8, 2026

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@copilot there seem to be many failing tests, so the PR is still not in good shape:

...
Failed GeneratedOK [48 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.StaticMethods.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/StaticMethods.cs:line 12
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
Failed GeneratedOK [44 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.StaticProperties.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/StaticProperties.cs:line 12
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
Failed GeneratedOK [61 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.Streams.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Streams.cs:line 12

CopilotAIand others added 2 commits June 8, 2026 12:09
@simonrozsival
Plan investigation for failing generator tests
ff097ff
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Fix generator-Tests Java.Interop dependency
6fb38a7
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>

CopilotAI commented Jun 8, 2026

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@copilot there seem to be many failing tests, so the PR is still not in good shape:

...

...

Fixed in 6fb38a7. I added an explicit ProjectReference to src/Java.Interop/Java.Interop.csproj in tests/generator-Tests/generator-Tests.csproj, so Java.Interop.dll is now copied into bin/Test*-net10.0 for the integration compiler references. I also restored src/Java.Base-ref.cs to the pre-plan state to remove the accidental unrelated delta.

@simonrozsival

simonrozsival commented Jun 8, 2026

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@copilot CI is failing, try to fix it:

Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
/Users/runner/hostedtoolcache/dotnet/dotnet test --logger trx;LogFileName=Java.Interop.Dynamic-Tests.trx --results-directory /Users/runner/work/_temp bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll" provided was not found.
##[error]Error: The process '/Users/runner/hostedtoolcache/dotnet/dotnet' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
##[warning]RetryHelper encountered task failure, will retry (attempt #: 1 out of 1) after 1000 ms
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
/Users/runner/hostedtoolcache/dotnet/dotnet test --logger trx;LogFileName=Java.Interop.Dynamic-Tests.trx --results-directory /Users/runner/work/_temp bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll" provided was not found.
##[error]Error: The process '/Users/runner/hostedtoolcache/dotnet/dotnet' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
Finishing: Tests: Java.Interop.Dynamic (.NET - MacOS)

or

The test source file "D:\a\1\s\bin/TestRelease-net10.0/Java.Interop-Tests.dll" provided was not found.
##[error]Error: The process 'C:\hostedtoolcache\windows\dotnet\dotnet.exe' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
##[warning]RetryHelper encountered task failure, will retry (attempt #: 1 out of 1) after 1000 ms
C:\Windows\system32\chcp.com 65001
Active code page: 65001
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
C:\hostedtoolcache\windows\dotnet\dotnet.exe test --logger trx;LogFileName=Java.Interop-Tests.trx --results-directory D:\a\_temp bin/TestRelease-net10.0/Java.Interop-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "D:\a\1\s\bin/TestRelease-net10.0/Java.Interop-Tests.dll" provided was not found.
##[error]Error: The process 'C:\hostedtoolcache\windows\dotnet\dotnet.exe' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
Finishing: Tests: Java.Interop (net10.0 - .NET - Windows)

CopilotAIand others added 2 commits June 8, 2026 13:39
@simonrozsival
Plan CI failure investigation
be4124f
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Remove deleted test assemblies from core CI template
c39003a
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>

CopilotAI commented Jun 8, 2026

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@copilot CI is failing, try to fix it:

Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted...

Fixed in c39003a. I removed the stale run-dotnet-test entries for deleted assemblies (Java.Interop-Tests, Java.Interop.Dynamic-Tests, Java.Interop-PerformanceTests, and Java.Base-Tests) from build-tools/automation/templates/core-tests.yaml, so CI no longer tries to run missing DLLs from bin/TestRelease-net10.0.

@simonrozsival

simonrozsival commented Jun 8, 2026

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@copilot explain why we needed to remove these tests. Does it mean that without the full Java.Runtime.Environment, we can't run Java.Interop tests outside of dotnet/android?

CopilotAI commented Jun 8, 2026

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@copilot explain why we needed to remove these tests. Does it mean that without the full Java.Runtime.Environment, we can't run Java.Interop tests outside of dotnet/android?

Those tests were removed because they depended on the standalone Java.Runtime.Environment host that this PR deletes. Once that runtime path was removed, those assemblies were no longer produced, so keeping their CI entries only caused false red failures.

It does not mean Java.Interop as a whole can only be used with dotnet/android. It means this repo no longer carries the old desktop/JRE-specific runtime host+test harness. The removed test projects specifically exercised that host. To run equivalent runtime tests outside dotnet/android again, we’d need to add and maintain a new supported non-Android host path.

jonathanpeppers
jonathanpeppers reviewed Jun 8, 2026
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Comment threadexternal/xamarin-android-tools
@jonathanpeppers
Revert unintended xamarin-android-tools submodule change
630522e
Co-authored-by: jonathanpeppers <840039+jonathanpeppers@users.noreply.github.com>
CopilotAI requested a review from jonathanpeppersJune 8, 2026 16:37
@simonrozsival
Restore Java.Interop tests without JRE runtime
4e2297d
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@simonrozsivalsimonrozsival changed the title Remove standalone Java.Runtime.Environment runtime pathRemove Java.Runtime.Environment and keep Java.Interop tests runningJun 9, 2026
CopilotAIand others added 2 commits June 22, 2026 08:10
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Merge remote-tracking branch 'origin/main' into remove-java-runtime-e…
a003dcd
…nvironment
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Implement new abstract JniValueManager members in Hello-NativeAOTFrom…
ed27671
…JNI sample
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>

CopilotAI commented Jun 22, 2026

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@copilot update the branch with latest changes from main and fix these build errors:

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoLogo -NoProfile -NonInteractive -ExecutionPoli...

Updated the branch with latest origin/main (clean merge) and fixed the build errors in 81dc (latest commit).

The trimmable-type-map work made several JniRuntime.JniValueManager members abstract (CreatePeer, CreateValueCore, GetValueCore, GetValueMarshalerCore, CreateLocalObjectReferenceArgumentCore, ActivatePeer, ConstructPeerCore). Since this smoke sample never constructs managed peers (it only returns a Java string via raw JNI), I implemented those members in the sample's ValueManager as AOT-safe NotSupportedException stubs rather than reintroducing the reflection-based manager.

Validated:

  • dotnet build samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj -c Release — 0 warnings
  • dotnet publish -r linux-x64 — NativeAOT codegen completes with no IL trim/AOT warnings
  • dotnet test tests/Java.Interop-Tests — 671 passed, 0 failed, 4 skipped

@simonrozsival

simonrozsival commented Jun 22, 2026

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@copilot fix failing build:

/usr/local/bin/pwsh -NoLogo -NoProfile -NonInteractive -Command . '/Users/runner/work/_temp/c200f9fa-3322-4cf3-8650-5b7159d65d36.ps1'
Determining projects to restore...
Restored /Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj (in 311 ms).
2 of 3 projects are up-to-date for restore.
Hello from Java!
JavaInteropRuntime.init : error : System.NotSupportedException: Please set CreationOptions.TypeManager! [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
at Java.Interop.JniRuntime..ctor(JniRuntime.CreationOptions) + 0x51e
at libHello-NativeAOTFromJNI!<BaseAddress>+0x78a8c
Unhandled exception. System.NotSupportedException: No available Java runtime to attach to. Please create one.
at Java.Interop.JniRuntime.get_CurrentRuntime() + 0x173
at Java.Interop.JniEnvironmentInfo..ctor() + 0x10
at Java.Interop.JniEnvironment.<>c.<.cctor>b__38_0() + 0x18
at System.Threading.ThreadLocal`1.GetValueSlow() + 0x25
at libHello-NativeAOTFromJNI!<BaseAddress>+0x786d1
/var/folders/d_/7cp7f2xj0m5gcp7ch5j2t7tc0000gn/T/MSBuildTemp/tmpdac8ca75ed214639b541fa75d6ccaa52.exec.cmd: line 2: 9273 Abort trap: 6 "/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App
/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targets(49,5): error MSB3073: The command ""/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App" exited with code 134. [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
Build FAILED.
JavaInteropRuntime.init : error : System.NotSupportedException: Please set CreationOptions.TypeManager! [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targets(49,5): error MSB3073: The command ""/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App" exited with code 134. [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
0 Warning(s)
2 Error(s)
Time Elapsed 00:00:01.68

@simonrozsival
Set CreationOptions.TypeManager in Hello-NativeAOTFromJNI sample runtime
d70097e
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>

CopilotAI commented Jun 22, 2026

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@copilot fix failing build:

/usr/local/bin/pwsh -NoLogo -NoProfile -NonInteractive -Command . '/Users/runner/work/_temp/c200f9fa-3322-4cf3-8650-5b7159d65d36.ps1'

...

Fixed in the latest commit. The sample's ExistingJniRuntime wasn't setting CreationOptions.TypeManager, so JniRuntime's constructor threw NotSupportedException: Please set CreationOptions.TypeManager!. I added TypeManager = new JniRuntime.JniTypeManager () to the CreationOptions (the base JniTypeManager is concrete and AOT-safe — its virtuals return empty, which is sufficient since this smoke sample only returns a Java string via raw JNI and never resolves managed types).

Validated end-to-end on linux-x64: NativeAOT publish + running net/dot/jni/hello/App now prints:

Hello from Java!
Hello from .NET NativeAOT!
String returned to Java: Hello from .NET NativeAOT!

The runtime initializes with no exception.

@simonrozsival

simonrozsival commented Jun 23, 2026

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@copilot fix the following build error:

CSC : error CS1566: Error reading resource 'Xamarin.Android.Tools.BytecodeTests.kotlin-gradle.Widgets.class' -- 'Could not find a part of the path '/Users/runner/work/1/s/tests/Xamarin.Android.Tools.Bytecode-Tests/kotlin-gradle/classes/xat/bytecode/tests/Widgets.class'.' [/Users/runner/work/1/s/tests/Xamarin.Android.Tools.Bytecode-Tests/Xamarin.Android.Tools.Bytecode-Tests.csproj]
0 Warning(s)
1 Error(s)

@simonrozsival
Isolate Kotlin Gradle test outputs per project
697b961
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>

CopilotAI commented Jun 23, 2026

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@copilot fix the following build error:

...

Fixed in 697b961. The Kotlin/Gradle fixture classes are now generated into each consuming test project's obj/ directory instead of a shared source-tree kotlin-gradle/classes directory, so parallel solution builds no longer race over the embedded Widgets.class resource.

Validated with dotnet build Java.Interop.sln -c Release from clean Kotlin outputs, plus Release builds/tests for Xamarin.Android.Tools.Bytecode-Tests and generator-Tests.

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/review

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🤖 Code Review — ✅ LGTM (with minor suggestions)

This is a clean, well-executed removal of the Java.Runtime.Environment project. The test-host runtime plumbing it provided (value/object-reference managers, JVM creation) is faithfully re-homed into tests/TestJVM/TestJVM.cs, the NativeAOT sample is made self-contained, and the native build is reworked to a static validation lib. CI is green (build + full Java.Interop test suite pass).

I diffed the ported ManagedValueManager / ManagedObjectReferenceManager against the deleted originals and verified:

  • gref/wgref counting is correct (incrementing on a valid result, decrementing on a valid input ref is the right asymmetry);
  • CreateJVM resource handling is sound — Dispose is idempotent, so the LoadJvmLibrary-throws path doesn't double-free;
  • the JavaVMInitArgs / JavaVMOption struct layouts (blittable, sequential) and the JNI_CreateJavaVMdelegate* unmanaged<...> signature match the JNI ABI.

I also confirmed there are no dangling references to the removed projects in the solution, Makefile, CI templates, or Sdk.targets, and that Hello-NativeAOTFromJNI (kept) is still exercised via the dedicated dotnet publish CI step rather than the solution.

Findings (non-blocking)

  • 💡 Documentation — tests/TestJVM/TestJVM.cs:478: the "why" comment about the Local-ref / SafeHandle.ReferenceType thread-locality invariant was dropped during the port.
  • 💡 MSBuild — samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj:41: hardcoded MacOSX15.sdk path will silently stop applying on future SDKs.

Nice touches

  • JniRuntimeJniValueManagerContract now binds the generic <ManagedValueManager> instead of Type.GetType("...Java.Runtime.Environment...") reflection — trimmer/AOT-friendly.
  • src/java-interop/CMakeLists.txt fixes a pre-existing foreach(dir in ${...}) syntax bug.
  • Makefilerun-net-tests gains the missing ; so every test assembly in the loop actually runs.

Verdict: ✅ LGTM — 0 ❌ · 0 ⚠️ · 2 💡. The two suggestions are optional and don't block merge.

Generated by Java.Interop PR Reviewer for issue #1447 · 2.5K AIC · ⌖ 46.9 AIC · ⊞ 34.6K
Comment /review to run again

Comment threadtests/TestJVM/TestJVM.cs
Comment threadsamples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj Outdated
@jonathanpeppers
Merge origin/main and address review feedback
eea9765
- Resolve merge conflicts with main by keeping deletions of:
- samples/Hello-NativeAOTFromAndroid/NativeAotTypeManager.cs
- samples/Hello-NativeAOTFromJNI/NativeAotTypeManager.cs
- src/Java.Runtime.Environment/Java.Interop/JreTypeManager.cs
- Address review comments from PR 1447:
- Restore the "why" comment on ManagedValueManager.FinalizePeer
explaining why we use JniObjectReference.Type instead of
SafeHandle.ReferenceType (the latter is thread-local and returns
Invalid off-thread for Local refs).
- Replace the hard-coded MacOSX15.sdk -isysroot path in
Hello-NativeAOTFromJNI.csproj with a target that resolves the
macOS SDK dynamically via `xcrun --show-sdk-path`, so it keeps
working on newer SDKs and on machines with full Xcode installed.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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🤖 Code Review — Remove Java.Runtime.Environment, keep Java.Interop tests running

Verdict: ✅ Looks good — minor suggestions only (posting as a COMMENT, not an approval).

This is a careful, well-scoped refactor. I read the full tests/TestJVM/TestJVM.cs and diffed the new value/reference managers against the deleted Java.Runtime.Environment originals — the port is faithful. Things I independently verified:

  • ✅ The new CreateJVM / NativeLibraryJvmLibraryHandler JVM-bootstrap path is correct: the JNI_CreateJavaVM function-pointer signature (out IntPtr, out IntPtr, ref JavaVMInitArgs) maps to JavaVM** / void** / void*; marshaled option strings are freed in finally; and the library handle is disposed on every failure path (no double-dispose, LibraryHandler nulled on error).
  • ✅ JavaVMInitArgs.version is a 4-byte int-backed JniVersion enum, matching jint; struct field order matches the JNI layout.
  • ✅ JDK_OnlySupportsOneVM expects NotSupportedException, which CreateJVM throws on r != 0; the InvocationPointer-only path correctly short-circuits before creating a second VM.
  • ✅ Swapping Type.GetType ("..., Java.Runtime.Environment", throwOnError) for JniRuntimeJniValueManagerContract<ManagedValueManager> removes a reflection/trimming hazard — a nice trimmer/AOT win, and it justifies making ManagedValueManager public.
  • ✅ App.cs's sayHello uses JniTransition with proper try/catch/finally; JavaInteropRuntime.init intentionally avoids JniTransition (the runtime isn't initialized yet) and logs instead — both correct.
  • ✅ Remaining product-code edits (obsolete message text, InternalsVisibleTo removal, generator/JniPeerMembers comment cleanup, CMake/targets/Makefile/sln updates) are pure cleanup of references to the deleted assembly.

Issue counts: 0 ❌ · 0 ⚠️ · 2 💡 (both inline, non-blocking)

⚠️ CI not yet green: at review time only license/cla has completed — the dotnet.java-interop Azure build is still queued, so I can't independently confirm the build/tests pass. The PR description reports 669 passed, 0 failed, 4 skipped locally; please make sure the Azure build goes green before merging.

Note on scope: this PR intentionally removes Java.Base / Java.Runtime.Environment, the samples, and the performance/dynamic test suites, so that coverage goes away by design — the retained Java.Interop-Tests still exercise the core runtime through the rehosted TestJVM.

Thanks for the detailed description and the explicit "kept vs. removed" breakdown — it made reviewing 39k deleted lines tractable. Two small 💡 suggestions inline; nothing blocking.

Generated by Java.Interop PR Reviewer for issue #1447 · 1.7K AIC · ⌖ 49.6 AIC · ⊞ 34.6K
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Comment threadtests/TestJVM/TestJVM.cs
Comment threadtests/TestJVM/TestJVM.cs
jonathanpeppersand others added 2 commits June 26, 2026 08:12
@jonathanpeppers
Fix invalid -- in XML comment in Hello-NativeAOTFromJNI.csproj
aed3c97
XML comments cannot contain --, which broke MSBuild parsing of the
csproj on CI. Reword the comment to drop the literal --show-sdk-path`nflag reference so the project loads again.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppers
Sync Hello-NativeAOTFromJNI ValueManager DAM attributes with base
54ef878
PR #1481 (merged into main after this PR opened) removed some
[DynamicallyAccessedMembers] attributes from the base
JniRuntime.JniValueManager abstract methods. After merging main,
the sample's overrides still had the old DAM attributes, producing
IL2092/IL2095 'overridden members must have the same
DynamicallyAccessedMembersAttribute usage' errors when publishing
for NativeAOT.
Drop DAM from the sample overrides to match the new base signatures:
- ActivatePeer (Type type, ...)
- GetValueMarshalerCore<T> ()
- CreateLocalObjectReferenceArgumentCore (Type type, ...)
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppers
jonathanpeppers merged commit 4e14244 into mainJun 26, 2026
2 checks passed
@jonathanpeppers
jonathanpeppers deleted the remove-java-runtime-environment branch June 26, 2026 15:19
jonathanpeppers added a commit to dotnet/android that referenced this pull request Jun 30, 2026
@jonathanpeppers
Remove Java.Runtime.Environment project from solution
871a945
The Java.Runtime.Environment project was removed upstream in dotnet/java-interop#1447 (commit 4e142449), so the reference in Xamarin.Android.sln no longer resolves and breaks restore.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
jonathanpeppers added a commit to dotnet/android that referenced this pull request Jul 1, 2026
@dependabot@jonathanpeppers
Bump todotnet/java-interop@6ec1345(#11782)
ad3f04b
### Bump external/Java.Interop from `8d54473` to `6ec1345`
Bumps [external/Java.Interop](https://github.com/dotnet/java-interop) from `8d54473` to `6ec1345`.
- [Commits](dotnet/java-interop@8d54473...6ec1345)
---
updated-dependencies:
- dependency-name: external/Java.Interop
dependency-version: 6ec1345165fa7385c935f16ccaa8cc38be50a080
dependency-type: direct:production
...
### Remove Java.Runtime.Environment project from solution
The Java.Runtime.Environment project was removed upstream in dotnet/java-interop#1447 (commit 4e142449), so the reference in Xamarin.Android.sln no longer resolves and breaks restore.
### Suppress new IL3050 warnings in ManagedTypeManager
Upstream dotnet/java-interop#1474 added [RequiresDynamicCode] to:
- JniRuntime.ReflectionJniTypeManager (the class), surfacing IL3050 at ManagedTypeManager..ctor() since we derive from it.
- JniEnvironment.Types.RegisterNatives(.., JniNativeMethodRegistration[], int), surfacing IL3050 at ManagedTypeManager.RegisterNativeMembers.
Suppress for now; the JniNativeMethodRegistration[] registration path will be migrated to the blittable RegisterNatives(JniObjectReference, ReadOnlySpan<JniNativeMethod>) overload in a future change.
Co-authored-by: Jonathan Peppers <jonathan.peppers@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppersjonathanpeppers mentioned this pull request Jul 6, 2026
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Remove Java.Runtime.Environment and keep Java.Interop tests running - #1447
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jonathanpeppers merged 34 commits into
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remove-java-runtime-environment
Jun 26, 2026
Merged
Remove Java.Runtime.Environment and keep Java.Interop tests running#1447
jonathanpeppers merged 34 commits into
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remove-java-runtime-environment
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@simonrozsival
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Related to dotnet/android#11843
Summary
  • Remove the standalone src/Java.Runtime.Environment project and the desktop/JRE runtime path it provided.
  • Remove the samples, performance tests, dynamic tests, and Java.Base tests that depended on the old standalone runtime surface.
  • Keep Java.Interop-Tests in the solution and CI, and restore them to a passing state without bringing back the Java.Runtime.Environment assembly.
  • Remove the Java.Runtime.Environment friend-assembly dependency from Java.Interop; keep only the Java.Interop-Tests friend access needed by the restored tests.
  • Trim src/java-interop down to the native source subset still consumed by dotnet/android, while keeping a minimal validation project so those sources continue to compile in this repo.
  • Keep a minimal Hello-NativeAOTFromJNI smoke sample that proves Java can load a NativeAOT library, initialize JniRuntime from an existing JNIEnv*, and call into a native C# method.
Note on tests/TestJVM/TestJVM.cs
This file intentionally grew because it now owns the small amount of JVM-hosting/runtime plumbing that Java.Interop-Tests still need after deleting Java.Runtime.Environment.
The new code is test-only and replaces the old TestJVM : JreRuntime dependency with a direct TestJVM : JniRuntime host. It keeps only the pieces needed by the core tests:
  • JNI_CreateJavaVM loading through NativeLibrary
  • classpath setup for java-interop.jar and interop-test.jar
  • JDK/JVM path discovery from JdkInfo.props or installed JDKs
  • a minimal object reference manager for global/weak-global reference counts
  • a minimal managed value manager for peer registration/lookup/finalization
  • a test type manager for the explicit Java type mappings used by the suite
It deliberately does not reintroduce the old product/runtime API surface such as JreRuntime, JreRuntimeOptions, Mono runtime managers, standalone runtime packaging, reference-log plumbing, or the native java-interop JVM loader path. The restored tests/test host have no remaining Java.Runtime.Environment references.
Note on samples/Hello-NativeAOTFromJNI
The old sample depended on Java.Runtime.Environment, so this PR restores it as a smaller smoke test instead of bringing back the old sample wholesale.
The new sample:
  • publishes a NativeAOT shared library,
  • lets Java load it with System.loadLibrary("Hello-NativeAOTFromJNI"),
  • initializes a sample-local JniRuntime from the existing JNIEnv*, and
  • calls a native C# sayHello() method that returns a Java string.
It does not exercise managed peer construction or generated JCWs; those can be added later with explicit support if we want a broader NativeAOT/JNI sample.
Validation
  • dotnet build -t:Prepare
  • dotnet build src/java-interop/java-interop.csproj
  • dotnet build src/Java.Interop/Java.Interop.csproj --no-restore
  • dotnet build tests/Java.Interop-Tests/Java.Interop-Tests.csproj --no-restore
  • dotnet test tests/Java.Interop-Tests/Java.Interop-Tests.csproj --no-build — 669 passed, 0 failed, 4 skipped
  • dotnet publish -c Release -r osx-arm64 samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj
  • dotnet build -c Release -r osx-arm64 -t:RunJavaSample samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj --no-restore
CopilotAI
review requested due to automatic review settings
June 8, 2026 10:23
@simonrozsival
Remove Java.Runtime.Environment runtime path
97ce2d3
Remove the standalone JRE runtime project and its sample/test consumers from the Java.Interop submodule. This keeps the core Java.Interop build path while dropping the desktop/JRE-oriented runtime pieces that are not needed by the main Android SDK.
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Pull request overview
This PR removes the standalone Java.Runtime.Environment project and its desktop/JRE-oriented test & sample consumers, and updates build/docs metadata to reflect the cleanup and discourage desktop-specific runtime helper usage at the Java.Interop layer.
Changes:
  • Removed src/Java.Runtime.Environment and all dependent test/sample projects that were built around a standalone desktop/JRE runtime.
  • Removed JVM-based test suites and performance/overhead benchmarks that depended on the removed runtime path.
  • Updated JniRuntime.GetAvailableInvocationPointers() obsolete guidance, the repo Makefile, and .github/copilot-instructions.md to align with the new shape.
Show a summary per file
FileDescription
tests/TestJVM/TestJVM.csprojRemoved TestJVM helper project (desktop/JRE runtime dependency).
tests/TestJVM/TestJVM.csRemoved TestJVM helper runtime implementation.
tests/Java.Interop.Dynamic-Tests/Java.Interop/JavaVMFixture.csRemoved Dynamic test fixture relying on TestJVM/JRE runtime.
tests/Java.Interop.Dynamic-Tests/Java.Interop/DynamicJavaInstanceTests.csRemoved Dynamic JVM-based test coverage.
tests/Java.Interop.Dynamic-Tests/Java.Interop/DynamicJavaClassTests.csRemoved Dynamic JVM-based test coverage.
tests/Java.Interop.Dynamic-Tests/Java.Interop.Dynamic-Tests.csprojRemoved Dynamic test project and its JRE runtime references.
tests/Java.Interop-Tests/java/net/dot/jni/test/TestType.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/SelfRegistration.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassDerived.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassBase2.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassBase1.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RegisterNativesTestType.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/ObjectHelper.javaRemoved Java-side helper used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/MyJavaInterfaceImpl.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/JavaInterface.javaRemoved Java-side interface used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/GetThis.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/DesugarAndroidInterface$_CC.javaRemoved Java-side desugar test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CrossReferenceBridge.javaRemoved Java-side GC bridge/cross-ref test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallVirtualFromConstructorDerived.javaRemoved Java-side constructor-virtual-call test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallVirtualFromConstructorBase.javaRemoved Java-side constructor-virtual-call test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualDerived2.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualDerived.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualBase.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/AnotherJavaInterfaceImpl.javaRemoved Java-side interface impl used by tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/AndroidInterface.javaRemoved Java-side interface used for desugar-related tests.
tests/Java.Interop-Tests/Java.Interop/TestTypeTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/SelfRegistrationTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/SelfRegistration.csRemoved managed type used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/MethodBindingTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniValueMarshalerAttributeTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTypeSignatureTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTypeSignatureAttributeTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTransitionTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntimeTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntime.JniValueManagerTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntime.JniTypeManagerTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniReferenceSafeHandleTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniMarshalTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniInstanceMethodIDTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniEnvironmentTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JavaVMFixture.Partial.csRemoved JVM fixture scaffolding.
tests/Java.Interop-Tests/Java.Interop/JavaVMFixture.csRemoved JVM fixture setup & type-manager mapping logic.
tests/Java.Interop-Tests/Java.Interop/JavaSingleArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaSByteArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaPrimitiveArrayContract.csRemoved JVM-based contract test base class.
tests/Java.Interop-Tests/Java.Interop/JavaPeerableExtensionsTests.csRemoved JVM-based extension tests and related managed bindings.
tests/Java.Interop-Tests/Java.Interop/JavaObjectExtensionsTests.csRemoved JVM-based extension tests.
tests/Java.Interop-Tests/Java.Interop/JavaObjectArrayTest.csRemoved JVM-based object array contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaManagedGCBridgeTests.csRemoved JVM-based GC bridge tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt64ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt32ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt16ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaExceptionTests.csRemoved JVM-based exception interop tests.
tests/Java.Interop-Tests/Java.Interop/JavaDoubleArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaCharArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaBooleanArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaArrayContract.csRemoved JVM-based contract test base class.
tests/Java.Interop-Tests/Java.Interop/InvokeVirtualFromConstructorTests.csRemoved JVM-based constructor dispatch tests.
tests/Java.Interop-Tests/Java.Interop/GetThis.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/FinalizerHelpers.csRemoved helper used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallVirtualFromConstructorDerived.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallVirtualFromConstructorBase.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualDerived2.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualDerived.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualBase.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop-Tests.targetsRemoved MSBuild logic for building interop-test.jar and JCWs.
tests/Java.Interop-Tests/Java.Interop-Tests.csprojRemoved JVM-based Java.Interop test project.
tests/Java.Interop-Tests/Cadenza/BaseRocksFixture.csRemoved Cadenza test fixture that depended on JavaVMFixture.
tests/Java.Interop-Tests/Cadenza.Collections/ListContract.csRemoved Cadenza collection contract tests.
tests/Java.Interop-Tests/Cadenza.Collections/EnumerableContract.csRemoved Cadenza enumerable contract tests.
tests/Java.Interop-PerformanceTests/java/com/xamarin/interop/performance/JavaTiming.javaRemoved Java-side performance benchmark fixture.
tests/Java.Interop-PerformanceTests/Java.Interop/JavaVMFixture.csRemoved perf test fixture relying on TestJVM.
tests/Java.Interop-PerformanceTests/Java.Interop/JavaPrimitiveArraysTiming.csRemoved perf tests and benchmark helpers.
tests/Java.Interop-PerformanceTests/Java.Interop-PerformanceTests.targetsRemoved perf test JAR build target.
tests/Java.Interop-PerformanceTests/Java.Interop-PerformanceTests.csprojRemoved performance test project.
tests/Java.Base-Tests/java/net/dot/jni/test/PublicInterface.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/net/dot/jni/test/InterfaceMethodInheritance.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/net/dot/jni/test/HasInterfaceMethodInheritance.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/com/microsoft/java_base_tests/Invoker.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/Java.Base/NestedTypeTests.csRemoved Java.Base JVM-based tests.
tests/Java.Base-Tests/Java.Base/JniRuntimeJniValueManagerContractExtras.csRemoved Java.Base JVM-based tests.
tests/Java.Base-Tests/Java.Base/JavaVMFixture.Partial.csRemoved Java.Base test fixture scaffolding.
tests/Java.Base-Tests/Java.Base/JavaVMFixture.csRemoved Java.Base fixture setup using TestJVM.
tests/Java.Base-Tests/Java.Base/JavaToManagedTests.csRemoved Java→managed callback tests.
tests/Java.Base-Tests/Java.Base/InterfaceMethodInheritanceTests.csRemoved interface inheritance tests.
tests/Java.Base-Tests/Java.Base-Tests.targetsRemoved Java.Base test targets.
tests/Java.Base-Tests/Java.Base-Tests.csprojRemoved Java.Base test project.
tests/invocation-overhead/README.mdRemoved standalone invocation-overhead benchmark documentation.
tests/invocation-overhead/MakefileRemoved invocation-overhead build helpers.
tests/invocation-overhead/invocation-overhead.targetsRemoved invocation-overhead MSBuild targets.
tests/invocation-overhead/invocation-overhead.csprojRemoved invocation-overhead benchmark project.
src/Java.Runtime.Environment/Properties/AssemblyInfo.csRemoved standalone runtime assembly configuration.
src/Java.Runtime.Environment/Java.Runtime.Environment.targetsRemoved standalone runtime MSBuild logic.
src/Java.Runtime.Environment/Java.Runtime.Environment.dll.config.inRemoved template for dllmap config generation.
src/Java.Runtime.Environment/Java.Runtime.Environment.csprojRemoved standalone runtime project.
src/Java.Runtime.Environment/Java.Interop/JreTypeManager.csRemoved JRE-specific type manager implementation.
src/Java.Runtime.Environment/.gitignoreRemoved ignore entry for generated runtime config.
src/Java.Interop/Properties/AssemblyInfo.csRemoved InternalsVisibleTo entries for deleted assemblies/tests.
src/Java.Interop/Java.Interop/JniRuntime.csUpdated obsolete guidance to avoid referencing removed desktop runtime helpers.
samples/Hello-NativeAOTFromJNI/README.mdRemoved desktop/JRE-oriented sample docs.
samples/Hello-NativeAOTFromJNI/NativeAotTypeManager.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/ManagedType.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/JavaInteropRuntime.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/JavaCallableAttributes.csRemoved sample-only callable attribute definitions.
samples/Hello-NativeAOTFromJNI/java/net/dot/jni/hello/JavaInteropRuntime.javaRemoved Java launcher/runtime sample code.
samples/Hello-NativeAOTFromJNI/java/net/dot/jni/hello/App.javaRemoved Java launcher sample code.
samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targetsRemoved sample build targets (JCW + jar).
samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csprojRemoved NativeAOT-from-JNI sample project.
samples/Hello-NativeAOTFromJNI/App.csRemoved sample native entrypoint code.
samples/Hello-NativeAOTFromAndroid/Transforms/Metadata.xmlRemoved Android NativeAOT sample transform metadata.
samples/Hello-NativeAOTFromAndroid/settings.gradleRemoved Android NativeAOT Gradle settings.
samples/Hello-NativeAOTFromAndroid/NativeAotTypeManager.csRemoved Android NativeAOT sample type manager.
samples/Hello-NativeAOTFromAndroid/MainActivity.csRemoved Android NativeAOT managed activity sample.
samples/Hello-NativeAOTFromAndroid/LogcatTextWriter.csRemoved Android NativeAOT logging helper.
samples/Hello-NativeAOTFromAndroid/JavaInteropRuntime.csRemoved Android NativeAOT runtime init code.
samples/Hello-NativeAOTFromAndroid/Hello-NativeAOTFromAndroid.csprojRemoved Android NativeAOT sample project.
samples/Hello-NativeAOTFromAndroid/gradle.propertiesRemoved Android NativeAOT sample config.
samples/Hello-NativeAOTFromAndroid/build.gradleRemoved Android NativeAOT sample build script.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/values/strings.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/layout/activity_main.xmlRemoved Android sample layout.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/drawable/ic_launcher_background.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/drawable-v24/ic_launcher_foreground.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/NativeAotRuntimeProvider.javaRemoved Android sample Java bootstrapping.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/JavaMainActivity.javaRemoved Android sample Java activity.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/JavaInteropRuntime.javaRemoved Android sample Java runtime loader.
samples/Hello-NativeAOTFromAndroid/app/src/main/AndroidManifest.xmlRemoved Android sample manifest.
samples/Hello-NativeAOTFromAndroid/app/proguard-rules.proRemoved Android sample ProGuard rules.
samples/Hello-NativeAOTFromAndroid/app/build.gradleRemoved Android sample module build script.
samples/Hello-NativeAOTFromAndroid/app/.gitignoreRemoved Android sample ignores.
samples/Hello-NativeAOTFromAndroid/android.xmlRemoved Android sample API XML input.
samples/Hello-NativeAOTFromAndroid/.gitignoreRemoved Android sample ignores.
samples/Hello-Java.Base/Program.csRemoved desktop/JRE-oriented sample program.
samples/Hello-Java.Base/Hello-Java.Base.csprojRemoved desktop/JRE-oriented sample project.
samples/Hello-Core/README.mdRemoved desktop/JRE-oriented sample docs.
samples/Hello-Core/Program.csRemoved desktop/JRE-oriented sample program.
samples/Hello-Core/Hello-Core.csprojRemoved desktop/JRE-oriented sample project.
MakefileUpdated build metadata, but currently still references removed test outputs (needs further adjustment).
.github/copilot-instructions.mdUpdated repository guidance to reflect removed runtime/tests and updated validation commands.
Copilot's findings
  • Files reviewed: 162/178 changed files
  • Comments generated: 1
Comment threadMakefile
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simonrozsivalforce-pushed
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@simonrozsival
Fix Makefile test targets after JRE cleanup
a18c60f
Update the Makefile test lists to match the remaining managed test projects and stop building removed desktop/JRE test outputs.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@simonrozsival
simonrozsival
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Jun 8, 2026

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@copilot there seem to be many failing tests, so the PR is still not in good shape:
...
Failed GeneratedOK [48 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.StaticMethods.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/StaticMethods.cs:line 12
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
Failed GeneratedOK [44 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.StaticProperties.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/StaticProperties.cs:line 12
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
Failed GeneratedOK [61 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.Streams.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Streams.cs:line 12

CopilotAIand others
added 2 commits
June 8, 2026 12:09
@simonrozsival
Plan investigation for failing generator tests
ff097ff
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Fix generator-Tests Java.Interop dependency
6fb38a7
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
CopilotAI
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Jun 8, 2026

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@copilot there seem to be many failing tests, so the PR is still not in good shape:
...

...
Fixed in 6fb38a7. I added an explicit ProjectReference to src/Java.Interop/Java.Interop.csproj in tests/generator-Tests/generator-Tests.csproj, so Java.Interop.dll is now copied into bin/Test*-net10.0 for the integration compiler references. I also restored src/Java.Base-ref.cs to the pre-plan state to remove the accidental unrelated delta.
@simonrozsival
simonrozsival
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Jun 8, 2026

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@copilot CI is failing, try to fix it:
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
/Users/runner/hostedtoolcache/dotnet/dotnet test --logger trx;LogFileName=Java.Interop.Dynamic-Tests.trx --results-directory /Users/runner/work/_temp bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll" provided was not found.
##[error]Error: The process '/Users/runner/hostedtoolcache/dotnet/dotnet' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
##[warning]RetryHelper encountered task failure, will retry (attempt #: 1 out of 1) after 1000 ms
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
/Users/runner/hostedtoolcache/dotnet/dotnet test --logger trx;LogFileName=Java.Interop.Dynamic-Tests.trx --results-directory /Users/runner/work/_temp bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll" provided was not found.
##[error]Error: The process '/Users/runner/hostedtoolcache/dotnet/dotnet' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
Finishing: Tests: Java.Interop.Dynamic (.NET - MacOS)

or
The test source file "D:\a\1\s\bin/TestRelease-net10.0/Java.Interop-Tests.dll" provided was not found.
##[error]Error: The process 'C:\hostedtoolcache\windows\dotnet\dotnet.exe' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
##[warning]RetryHelper encountered task failure, will retry (attempt #: 1 out of 1) after 1000 ms
C:\Windows\system32\chcp.com 65001
Active code page: 65001
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
C:\hostedtoolcache\windows\dotnet\dotnet.exe test --logger trx;LogFileName=Java.Interop-Tests.trx --results-directory D:\a\_temp bin/TestRelease-net10.0/Java.Interop-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "D:\a\1\s\bin/TestRelease-net10.0/Java.Interop-Tests.dll" provided was not found.
##[error]Error: The process 'C:\hostedtoolcache\windows\dotnet\dotnet.exe' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
Finishing: Tests: Java.Interop (net10.0 - .NET - Windows)

CopilotAIand others
added 2 commits
June 8, 2026 13:39
@simonrozsival
Plan CI failure investigation
be4124f
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Remove deleted test assemblies from core CI template
c39003a
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
CopilotAI
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Jun 8, 2026

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@copilot CI is failing, try to fix it:
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted...

Fixed in c39003a. I removed the stale run-dotnet-test entries for deleted assemblies (Java.Interop-Tests, Java.Interop.Dynamic-Tests, Java.Interop-PerformanceTests, and Java.Base-Tests) from build-tools/automation/templates/core-tests.yaml, so CI no longer tries to run missing DLLs from bin/TestRelease-net10.0.
@simonrozsival
simonrozsival
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Jun 8, 2026

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@copilot explain why we needed to remove these tests. Does it mean that without the full Java.Runtime.Environment, we can't run Java.Interop tests outside of dotnet/android?
CopilotAI
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Jun 8, 2026

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@copilot explain why we needed to remove these tests. Does it mean that without the full Java.Runtime.Environment, we can't run Java.Interop tests outside of dotnet/android?
Those tests were removed because they depended on the standalone Java.Runtime.Environment host that this PR deletes. Once that runtime path was removed, those assemblies were no longer produced, so keeping their CI entries only caused false red failures.
It does not mean Java.Interop as a whole can only be used with dotnet/android. It means this repo no longer carries the old desktop/JRE-specific runtime host+test harness. The removed test projects specifically exercised that host. To run equivalent runtime tests outside dotnet/android again, we’d need to add and maintain a new supported non-Android host path.
jonathanpeppers
jonathanpeppers
reviewed
Jun 8, 2026
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Comment threadexternal/xamarin-android-tools
@jonathanpeppers
Revert unintended xamarin-android-tools submodule change
630522e
Co-authored-by: jonathanpeppers <840039+jonathanpeppers@users.noreply.github.com>
CopilotAI
requested a review
from jonathanpeppersJune 8, 2026 16:37
@simonrozsival
Restore Java.Interop tests without JRE runtime
4e2297d
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@simonrozsivalsimonrozsival
changed the title
Remove standalone Java.Runtime.Environment runtime pathRemove Java.Runtime.Environment and keep Java.Interop tests runningJun 9, 2026
CopilotAIand others
added 2 commits
June 22, 2026 08:10
@simonrozsival
Merge remote-tracking branch 'origin/main' into remove-java-runtime-e…
a003dcd
…nvironment
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Implement new abstract JniValueManager members in Hello-NativeAOTFrom…
ed27671
…JNI sample
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
CopilotAI
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Jun 22, 2026

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@copilot update the branch with latest changes from main and fix these build errors:
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoLogo -NoProfile -NonInteractive -ExecutionPoli...

Updated the branch with latest origin/main (clean merge) and fixed the build errors in 81dc (latest commit).
The trimmable-type-map work made several JniRuntime.JniValueManager members abstract (CreatePeer, CreateValueCore, GetValueCore, GetValueMarshalerCore, CreateLocalObjectReferenceArgumentCore, ActivatePeer, ConstructPeerCore). Since this smoke sample never constructs managed peers (it only returns a Java string via raw JNI), I implemented those members in the sample's ValueManager as AOT-safe NotSupportedException stubs rather than reintroducing the reflection-based manager.
Validated:
  • dotnet build samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj -c Release — 0 warnings
  • dotnet publish -r linux-x64 — NativeAOT codegen completes with no IL trim/AOT warnings
  • dotnet test tests/Java.Interop-Tests — 671 passed, 0 failed, 4 skipped
@simonrozsival
simonrozsival
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Jun 22, 2026

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@copilot fix failing build:
/usr/local/bin/pwsh -NoLogo -NoProfile -NonInteractive -Command . '/Users/runner/work/_temp/c200f9fa-3322-4cf3-8650-5b7159d65d36.ps1'
Determining projects to restore...
Restored /Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj (in 311 ms).
2 of 3 projects are up-to-date for restore.
Hello from Java!
JavaInteropRuntime.init : error : System.NotSupportedException: Please set CreationOptions.TypeManager! [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
at Java.Interop.JniRuntime..ctor(JniRuntime.CreationOptions) + 0x51e
at libHello-NativeAOTFromJNI!<BaseAddress>+0x78a8c
Unhandled exception. System.NotSupportedException: No available Java runtime to attach to. Please create one.
at Java.Interop.JniRuntime.get_CurrentRuntime() + 0x173
at Java.Interop.JniEnvironmentInfo..ctor() + 0x10
at Java.Interop.JniEnvironment.<>c.<.cctor>b__38_0() + 0x18
at System.Threading.ThreadLocal`1.GetValueSlow() + 0x25
at libHello-NativeAOTFromJNI!<BaseAddress>+0x786d1
/var/folders/d_/7cp7f2xj0m5gcp7ch5j2t7tc0000gn/T/MSBuildTemp/tmpdac8ca75ed214639b541fa75d6ccaa52.exec.cmd: line 2: 9273 Abort trap: 6 "/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App
/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targets(49,5): error MSB3073: The command ""/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App" exited with code 134. [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
Build FAILED.
JavaInteropRuntime.init : error : System.NotSupportedException: Please set CreationOptions.TypeManager! [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targets(49,5): error MSB3073: The command ""/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App" exited with code 134. [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
0 Warning(s)
2 Error(s)
Time Elapsed 00:00:01.68

@simonrozsival
Set CreationOptions.TypeManager in Hello-NativeAOTFromJNI sample runtime
d70097e
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
CopilotAI
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Jun 22, 2026

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@copilot fix failing build:
/usr/local/bin/pwsh -NoLogo -NoProfile -NonInteractive -Command . '/Users/runner/work/_temp/c200f9fa-3322-4cf3-8650-5b7159d65d36.ps1'

...
Fixed in the latest commit. The sample's ExistingJniRuntime wasn't setting CreationOptions.TypeManager, so JniRuntime's constructor threw NotSupportedException: Please set CreationOptions.TypeManager!. I added TypeManager = new JniRuntime.JniTypeManager () to the CreationOptions (the base JniTypeManager is concrete and AOT-safe — its virtuals return empty, which is sufficient since this smoke sample only returns a Java string via raw JNI and never resolves managed types).
Validated end-to-end on linux-x64: NativeAOT publish + running net/dot/jni/hello/App now prints:
Hello from Java!
Hello from .NET NativeAOT!
String returned to Java: Hello from .NET NativeAOT!

The runtime initializes with no exception.
@simonrozsival
simonrozsival
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Jun 23, 2026

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@copilot fix the following build error:
CSC : error CS1566: Error reading resource 'Xamarin.Android.Tools.BytecodeTests.kotlin-gradle.Widgets.class' -- 'Could not find a part of the path '/Users/runner/work/1/s/tests/Xamarin.Android.Tools.Bytecode-Tests/kotlin-gradle/classes/xat/bytecode/tests/Widgets.class'.' [/Users/runner/work/1/s/tests/Xamarin.Android.Tools.Bytecode-Tests/Xamarin.Android.Tools.Bytecode-Tests.csproj]
0 Warning(s)
1 Error(s)

@simonrozsival
Isolate Kotlin Gradle test outputs per project
697b961
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
CopilotAI
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@copilot fix the following build error:
...
Fixed in 697b961. The Kotlin/Gradle fixture classes are now generated into each consuming test project's obj/ directory instead of a shared source-tree kotlin-gradle/classes directory, so parallel solution builds no longer race over the embedded Widgets.class resource.
Validated with dotnet build Java.Interop.sln -c Release from clean Kotlin outputs, plus Release builds/tests for Xamarin.Android.Tools.Bytecode-Tests and generator-Tests.
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🤖 Code Review — ✅ LGTM (with minor suggestions)
This is a clean, well-executed removal of the Java.Runtime.Environment project. The test-host runtime plumbing it provided (value/object-reference managers, JVM creation) is faithfully re-homed into tests/TestJVM/TestJVM.cs, the NativeAOT sample is made self-contained, and the native build is reworked to a static validation lib. CI is green (build + full Java.Interop test suite pass).
I diffed the ported ManagedValueManager / ManagedObjectReferenceManager against the deleted originals and verified:
  • gref/wgref counting is correct (incrementing on a valid result, decrementing on a valid input ref is the right asymmetry);
  • CreateJVM resource handling is sound — Dispose is idempotent, so the LoadJvmLibrary-throws path doesn't double-free;
  • the JavaVMInitArgs / JavaVMOption struct layouts (blittable, sequential) and the JNI_CreateJavaVMdelegate* unmanaged<...> signature match the JNI ABI.
I also confirmed there are no dangling references to the removed projects in the solution, Makefile, CI templates, or Sdk.targets, and that Hello-NativeAOTFromJNI (kept) is still exercised via the dedicated dotnet publish CI step rather than the solution.
Findings (non-blocking)
  • 💡 Documentation — tests/TestJVM/TestJVM.cs:478: the "why" comment about the Local-ref / SafeHandle.ReferenceType thread-locality invariant was dropped during the port.
  • 💡 MSBuild — samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj:41: hardcoded MacOSX15.sdk path will silently stop applying on future SDKs.
Nice touches
  • JniRuntimeJniValueManagerContract now binds the generic <ManagedValueManager> instead of Type.GetType("...Java.Runtime.Environment...") reflection — trimmer/AOT-friendly.
  • src/java-interop/CMakeLists.txt fixes a pre-existing foreach(dir in ${...}) syntax bug.
  • Makefilerun-net-tests gains the missing ; so every test assembly in the loop actually runs.
Verdict: ✅ LGTM — 0 ❌ · 0 ⚠️ · 2 💡. The two suggestions are optional and don't block merge.
Generated by Java.Interop PR Reviewer for issue #1447 · 2.5K AIC · ⌖ 46.9 AIC · ⊞ 34.6K
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Comment threadtests/TestJVM/TestJVM.cs
Comment threadsamples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj
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@jonathanpeppers
Merge origin/main and address review feedback
eea9765
- Resolve merge conflicts with main by keeping deletions of:
- samples/Hello-NativeAOTFromAndroid/NativeAotTypeManager.cs
- samples/Hello-NativeAOTFromJNI/NativeAotTypeManager.cs
- src/Java.Runtime.Environment/Java.Interop/JreTypeManager.cs
- Address review comments from PR 1447:
- Restore the "why" comment on ManagedValueManager.FinalizePeer
explaining why we use JniObjectReference.Type instead of
SafeHandle.ReferenceType (the latter is thread-local and returns
Invalid off-thread for Local refs).
- Replace the hard-coded MacOSX15.sdk -isysroot path in
Hello-NativeAOTFromJNI.csproj with a target that resolves the
macOS SDK dynamically via `xcrun --show-sdk-path`, so it keeps
working on newer SDKs and on machines with full Xcode installed.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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🤖 Code Review — Remove Java.Runtime.Environment, keep Java.Interop tests running
Verdict: ✅ Looks good — minor suggestions only (posting as a COMMENT, not an approval).
This is a careful, well-scoped refactor. I read the full tests/TestJVM/TestJVM.cs and diffed the new value/reference managers against the deleted Java.Runtime.Environment originals — the port is faithful. Things I independently verified:
  • ✅ The new CreateJVM / NativeLibraryJvmLibraryHandler JVM-bootstrap path is correct: the JNI_CreateJavaVM function-pointer signature (out IntPtr, out IntPtr, ref JavaVMInitArgs) maps to JavaVM** / void** / void*; marshaled option strings are freed in finally; and the library handle is disposed on every failure path (no double-dispose, LibraryHandler nulled on error).
  • ✅ JavaVMInitArgs.version is a 4-byte int-backed JniVersion enum, matching jint; struct field order matches the JNI layout.
  • ✅ JDK_OnlySupportsOneVM expects NotSupportedException, which CreateJVM throws on r != 0; the InvocationPointer-only path correctly short-circuits before creating a second VM.
  • ✅ Swapping Type.GetType ("..., Java.Runtime.Environment", throwOnError) for JniRuntimeJniValueManagerContract<ManagedValueManager> removes a reflection/trimming hazard — a nice trimmer/AOT win, and it justifies making ManagedValueManager public.
  • ✅ App.cs's sayHello uses JniTransition with proper try/catch/finally; JavaInteropRuntime.init intentionally avoids JniTransition (the runtime isn't initialized yet) and logs instead — both correct.
  • ✅ Remaining product-code edits (obsolete message text, InternalsVisibleTo removal, generator/JniPeerMembers comment cleanup, CMake/targets/Makefile/sln updates) are pure cleanup of references to the deleted assembly.
Issue counts: 0 ❌ · 0 ⚠️ · 2 💡 (both inline, non-blocking)
⚠️ CI not yet green: at review time only license/cla has completed — the dotnet.java-interop Azure build is still queued, so I can't independently confirm the build/tests pass. The PR description reports 669 passed, 0 failed, 4 skipped locally; please make sure the Azure build goes green before merging.
Note on scope: this PR intentionally removes Java.Base / Java.Runtime.Environment, the samples, and the performance/dynamic test suites, so that coverage goes away by design — the retained Java.Interop-Tests still exercise the core runtime through the rehosted TestJVM.
Thanks for the detailed description and the explicit "kept vs. removed" breakdown — it made reviewing 39k deleted lines tractable. Two small 💡 suggestions inline; nothing blocking.
Generated by Java.Interop PR Reviewer for issue #1447 · 1.7K AIC · ⌖ 49.6 AIC · ⊞ 34.6K
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Comment threadtests/TestJVM/TestJVM.cs
Comment threadtests/TestJVM/TestJVM.cs
jonathanpeppersand others
added 2 commits
June 26, 2026 08:12
@jonathanpeppers
Fix invalid -- in XML comment in Hello-NativeAOTFromJNI.csproj
aed3c97
XML comments cannot contain --, which broke MSBuild parsing of the
csproj on CI. Reword the comment to drop the literal --show-sdk-path`nflag reference so the project loads again.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppers
Sync Hello-NativeAOTFromJNI ValueManager DAM attributes with base
54ef878
PR #1481 (merged into main after this PR opened) removed some
[DynamicallyAccessedMembers] attributes from the base
JniRuntime.JniValueManager abstract methods. After merging main,
the sample's overrides still had the old DAM attributes, producing
IL2092/IL2095 'overridden members must have the same
DynamicallyAccessedMembersAttribute usage' errors when publishing
for NativeAOT.
Drop DAM from the sample overrides to match the new base signatures:
- ActivatePeer (Type type, ...)
- GetValueMarshalerCore<T> ()
- CreateLocalObjectReferenceArgumentCore (Type type, ...)
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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@jonathanpeppers
Remove Java.Runtime.Environment project from solution
871a945
The Java.Runtime.Environment project was removed upstream in dotnet/java-interop#1447 (commit 4e142449), so the reference in Xamarin.Android.sln no longer resolves and breaks restore.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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@dependabot@jonathanpeppers
Bump todotnet/java-interop@6ec1345(#11782)
ad3f04b
### Bump external/Java.Interop from `8d54473` to `6ec1345`
Bumps [external/Java.Interop](https://github.com/dotnet/java-interop) from `8d54473` to `6ec1345`.
- [Commits](dotnet/java-interop@8d54473...6ec1345)
---
updated-dependencies:
- dependency-name: external/Java.Interop
dependency-version: 6ec1345165fa7385c935f16ccaa8cc38be50a080
dependency-type: direct:production
...
### Remove Java.Runtime.Environment project from solution
The Java.Runtime.Environment project was removed upstream in dotnet/java-interop#1447 (commit 4e142449), so the reference in Xamarin.Android.sln no longer resolves and breaks restore.
### Suppress new IL3050 warnings in ManagedTypeManager
Upstream dotnet/java-interop#1474 added [RequiresDynamicCode] to:
- JniRuntime.ReflectionJniTypeManager (the class), surfacing IL3050 at ManagedTypeManager..ctor() since we derive from it.
- JniEnvironment.Types.RegisterNatives(.., JniNativeMethodRegistration[], int), surfacing IL3050 at ManagedTypeManager.RegisterNativeMembers.
Suppress for now; the JniNativeMethodRegistration[] registration path will be migrated to the blittable RegisterNatives(JniObjectReference, ReadOnlySpan<JniNativeMethod>) overload in a future change.
Co-authored-by: Jonathan Peppers <jonathan.peppers@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Jul 6, 2026
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Remove Java.Runtime.Environment and keep Java.Interop tests running - #1447
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Remove Java.Runtime.Environment and keep Java.Interop tests running#1447
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@simonrozsivalsimonrozsival
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Related to dotnet/android#11843
Summary
  • Remove the standalone src/Java.Runtime.Environment project and the desktop/JRE runtime path it provided.
  • Remove the samples, performance tests, dynamic tests, and Java.Base tests that depended on the old standalone runtime surface.
  • Keep Java.Interop-Tests in the solution and CI, and restore them to a passing state without bringing back the Java.Runtime.Environment assembly.
  • Remove the Java.Runtime.Environment friend-assembly dependency from Java.Interop; keep only the Java.Interop-Tests friend access needed by the restored tests.
  • Trim src/java-interop down to the native source subset still consumed by dotnet/android, while keeping a minimal validation project so those sources continue to compile in this repo.
  • Keep a minimal Hello-NativeAOTFromJNI smoke sample that proves Java can load a NativeAOT library, initialize JniRuntime from an existing JNIEnv*, and call into a native C# method.
Note on tests/TestJVM/TestJVM.cs
This file intentionally grew because it now owns the small amount of JVM-hosting/runtime plumbing that Java.Interop-Tests still need after deleting Java.Runtime.Environment.
The new code is test-only and replaces the old TestJVM : JreRuntime dependency with a direct TestJVM : JniRuntime host. It keeps only the pieces needed by the core tests:
  • JNI_CreateJavaVM loading through NativeLibrary
  • classpath setup for java-interop.jar and interop-test.jar
  • JDK/JVM path discovery from JdkInfo.props or installed JDKs
  • a minimal object reference manager for global/weak-global reference counts
  • a minimal managed value manager for peer registration/lookup/finalization
  • a test type manager for the explicit Java type mappings used by the suite
It deliberately does not reintroduce the old product/runtime API surface such as JreRuntime, JreRuntimeOptions, Mono runtime managers, standalone runtime packaging, reference-log plumbing, or the native java-interop JVM loader path. The restored tests/test host have no remaining Java.Runtime.Environment references.
Note on samples/Hello-NativeAOTFromJNI
The old sample depended on Java.Runtime.Environment, so this PR restores it as a smaller smoke test instead of bringing back the old sample wholesale.
The new sample:
  • publishes a NativeAOT shared library,
  • lets Java load it with System.loadLibrary("Hello-NativeAOTFromJNI"),
  • initializes a sample-local JniRuntime from the existing JNIEnv*, and
  • calls a native C# sayHello() method that returns a Java string.
It does not exercise managed peer construction or generated JCWs; those can be added later with explicit support if we want a broader NativeAOT/JNI sample.
Validation
  • dotnet build -t:Prepare
  • dotnet build src/java-interop/java-interop.csproj
  • dotnet build src/Java.Interop/Java.Interop.csproj --no-restore
  • dotnet build tests/Java.Interop-Tests/Java.Interop-Tests.csproj --no-restore
  • dotnet test tests/Java.Interop-Tests/Java.Interop-Tests.csproj --no-build — 669 passed, 0 failed, 4 skipped
  • dotnet publish -c Release -r osx-arm64 samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj
  • dotnet build -c Release -r osx-arm64 -t:RunJavaSample samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj --no-restore
CopilotAI
review requested due to automatic review settings
June 8, 2026 10:23
@simonrozsival
Remove Java.Runtime.Environment runtime path
97ce2d3
Remove the standalone JRE runtime project and its sample/test consumers from the Java.Interop submodule. This keeps the core Java.Interop build path while dropping the desktop/JRE-oriented runtime pieces that are not needed by the main Android SDK.
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Pull request overview
This PR removes the standalone Java.Runtime.Environment project and its desktop/JRE-oriented test & sample consumers, and updates build/docs metadata to reflect the cleanup and discourage desktop-specific runtime helper usage at the Java.Interop layer.
Changes:
  • Removed src/Java.Runtime.Environment and all dependent test/sample projects that were built around a standalone desktop/JRE runtime.
  • Removed JVM-based test suites and performance/overhead benchmarks that depended on the removed runtime path.
  • Updated JniRuntime.GetAvailableInvocationPointers() obsolete guidance, the repo Makefile, and .github/copilot-instructions.md to align with the new shape.
Show a summary per file
FileDescription
tests/TestJVM/TestJVM.csprojRemoved TestJVM helper project (desktop/JRE runtime dependency).
tests/TestJVM/TestJVM.csRemoved TestJVM helper runtime implementation.
tests/Java.Interop.Dynamic-Tests/Java.Interop/JavaVMFixture.csRemoved Dynamic test fixture relying on TestJVM/JRE runtime.
tests/Java.Interop.Dynamic-Tests/Java.Interop/DynamicJavaInstanceTests.csRemoved Dynamic JVM-based test coverage.
tests/Java.Interop.Dynamic-Tests/Java.Interop/DynamicJavaClassTests.csRemoved Dynamic JVM-based test coverage.
tests/Java.Interop.Dynamic-Tests/Java.Interop.Dynamic-Tests.csprojRemoved Dynamic test project and its JRE runtime references.
tests/Java.Interop-Tests/java/net/dot/jni/test/TestType.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/SelfRegistration.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassDerived.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassBase2.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassBase1.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RegisterNativesTestType.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/ObjectHelper.javaRemoved Java-side helper used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/MyJavaInterfaceImpl.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/JavaInterface.javaRemoved Java-side interface used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/GetThis.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/DesugarAndroidInterface$_CC.javaRemoved Java-side desugar test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CrossReferenceBridge.javaRemoved Java-side GC bridge/cross-ref test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallVirtualFromConstructorDerived.javaRemoved Java-side constructor-virtual-call test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallVirtualFromConstructorBase.javaRemoved Java-side constructor-virtual-call test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualDerived2.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualDerived.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualBase.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/AnotherJavaInterfaceImpl.javaRemoved Java-side interface impl used by tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/AndroidInterface.javaRemoved Java-side interface used for desugar-related tests.
tests/Java.Interop-Tests/Java.Interop/TestTypeTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/SelfRegistrationTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/SelfRegistration.csRemoved managed type used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/MethodBindingTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniValueMarshalerAttributeTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTypeSignatureTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTypeSignatureAttributeTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTransitionTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntimeTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntime.JniValueManagerTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntime.JniTypeManagerTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniReferenceSafeHandleTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniMarshalTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniInstanceMethodIDTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniEnvironmentTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JavaVMFixture.Partial.csRemoved JVM fixture scaffolding.
tests/Java.Interop-Tests/Java.Interop/JavaVMFixture.csRemoved JVM fixture setup & type-manager mapping logic.
tests/Java.Interop-Tests/Java.Interop/JavaSingleArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaSByteArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaPrimitiveArrayContract.csRemoved JVM-based contract test base class.
tests/Java.Interop-Tests/Java.Interop/JavaPeerableExtensionsTests.csRemoved JVM-based extension tests and related managed bindings.
tests/Java.Interop-Tests/Java.Interop/JavaObjectExtensionsTests.csRemoved JVM-based extension tests.
tests/Java.Interop-Tests/Java.Interop/JavaObjectArrayTest.csRemoved JVM-based object array contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaManagedGCBridgeTests.csRemoved JVM-based GC bridge tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt64ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt32ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt16ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaExceptionTests.csRemoved JVM-based exception interop tests.
tests/Java.Interop-Tests/Java.Interop/JavaDoubleArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaCharArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaBooleanArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaArrayContract.csRemoved JVM-based contract test base class.
tests/Java.Interop-Tests/Java.Interop/InvokeVirtualFromConstructorTests.csRemoved JVM-based constructor dispatch tests.
tests/Java.Interop-Tests/Java.Interop/GetThis.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/FinalizerHelpers.csRemoved helper used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallVirtualFromConstructorDerived.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallVirtualFromConstructorBase.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualDerived2.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualDerived.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualBase.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop-Tests.targetsRemoved MSBuild logic for building interop-test.jar and JCWs.
tests/Java.Interop-Tests/Java.Interop-Tests.csprojRemoved JVM-based Java.Interop test project.
tests/Java.Interop-Tests/Cadenza/BaseRocksFixture.csRemoved Cadenza test fixture that depended on JavaVMFixture.
tests/Java.Interop-Tests/Cadenza.Collections/ListContract.csRemoved Cadenza collection contract tests.
tests/Java.Interop-Tests/Cadenza.Collections/EnumerableContract.csRemoved Cadenza enumerable contract tests.
tests/Java.Interop-PerformanceTests/java/com/xamarin/interop/performance/JavaTiming.javaRemoved Java-side performance benchmark fixture.
tests/Java.Interop-PerformanceTests/Java.Interop/JavaVMFixture.csRemoved perf test fixture relying on TestJVM.
tests/Java.Interop-PerformanceTests/Java.Interop/JavaPrimitiveArraysTiming.csRemoved perf tests and benchmark helpers.
tests/Java.Interop-PerformanceTests/Java.Interop-PerformanceTests.targetsRemoved perf test JAR build target.
tests/Java.Interop-PerformanceTests/Java.Interop-PerformanceTests.csprojRemoved performance test project.
tests/Java.Base-Tests/java/net/dot/jni/test/PublicInterface.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/net/dot/jni/test/InterfaceMethodInheritance.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/net/dot/jni/test/HasInterfaceMethodInheritance.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/com/microsoft/java_base_tests/Invoker.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/Java.Base/NestedTypeTests.csRemoved Java.Base JVM-based tests.
tests/Java.Base-Tests/Java.Base/JniRuntimeJniValueManagerContractExtras.csRemoved Java.Base JVM-based tests.
tests/Java.Base-Tests/Java.Base/JavaVMFixture.Partial.csRemoved Java.Base test fixture scaffolding.
tests/Java.Base-Tests/Java.Base/JavaVMFixture.csRemoved Java.Base fixture setup using TestJVM.
tests/Java.Base-Tests/Java.Base/JavaToManagedTests.csRemoved Java→managed callback tests.
tests/Java.Base-Tests/Java.Base/InterfaceMethodInheritanceTests.csRemoved interface inheritance tests.
tests/Java.Base-Tests/Java.Base-Tests.targetsRemoved Java.Base test targets.
tests/Java.Base-Tests/Java.Base-Tests.csprojRemoved Java.Base test project.
tests/invocation-overhead/README.mdRemoved standalone invocation-overhead benchmark documentation.
tests/invocation-overhead/MakefileRemoved invocation-overhead build helpers.
tests/invocation-overhead/invocation-overhead.targetsRemoved invocation-overhead MSBuild targets.
tests/invocation-overhead/invocation-overhead.csprojRemoved invocation-overhead benchmark project.
src/Java.Runtime.Environment/Properties/AssemblyInfo.csRemoved standalone runtime assembly configuration.
src/Java.Runtime.Environment/Java.Runtime.Environment.targetsRemoved standalone runtime MSBuild logic.
src/Java.Runtime.Environment/Java.Runtime.Environment.dll.config.inRemoved template for dllmap config generation.
src/Java.Runtime.Environment/Java.Runtime.Environment.csprojRemoved standalone runtime project.
src/Java.Runtime.Environment/Java.Interop/JreTypeManager.csRemoved JRE-specific type manager implementation.
src/Java.Runtime.Environment/.gitignoreRemoved ignore entry for generated runtime config.
src/Java.Interop/Properties/AssemblyInfo.csRemoved InternalsVisibleTo entries for deleted assemblies/tests.
src/Java.Interop/Java.Interop/JniRuntime.csUpdated obsolete guidance to avoid referencing removed desktop runtime helpers.
samples/Hello-NativeAOTFromJNI/README.mdRemoved desktop/JRE-oriented sample docs.
samples/Hello-NativeAOTFromJNI/NativeAotTypeManager.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/ManagedType.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/JavaInteropRuntime.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/JavaCallableAttributes.csRemoved sample-only callable attribute definitions.
samples/Hello-NativeAOTFromJNI/java/net/dot/jni/hello/JavaInteropRuntime.javaRemoved Java launcher/runtime sample code.
samples/Hello-NativeAOTFromJNI/java/net/dot/jni/hello/App.javaRemoved Java launcher sample code.
samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targetsRemoved sample build targets (JCW + jar).
samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csprojRemoved NativeAOT-from-JNI sample project.
samples/Hello-NativeAOTFromJNI/App.csRemoved sample native entrypoint code.
samples/Hello-NativeAOTFromAndroid/Transforms/Metadata.xmlRemoved Android NativeAOT sample transform metadata.
samples/Hello-NativeAOTFromAndroid/settings.gradleRemoved Android NativeAOT Gradle settings.
samples/Hello-NativeAOTFromAndroid/NativeAotTypeManager.csRemoved Android NativeAOT sample type manager.
samples/Hello-NativeAOTFromAndroid/MainActivity.csRemoved Android NativeAOT managed activity sample.
samples/Hello-NativeAOTFromAndroid/LogcatTextWriter.csRemoved Android NativeAOT logging helper.
samples/Hello-NativeAOTFromAndroid/JavaInteropRuntime.csRemoved Android NativeAOT runtime init code.
samples/Hello-NativeAOTFromAndroid/Hello-NativeAOTFromAndroid.csprojRemoved Android NativeAOT sample project.
samples/Hello-NativeAOTFromAndroid/gradle.propertiesRemoved Android NativeAOT sample config.
samples/Hello-NativeAOTFromAndroid/build.gradleRemoved Android NativeAOT sample build script.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/values/strings.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/layout/activity_main.xmlRemoved Android sample layout.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/drawable/ic_launcher_background.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/drawable-v24/ic_launcher_foreground.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/NativeAotRuntimeProvider.javaRemoved Android sample Java bootstrapping.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/JavaMainActivity.javaRemoved Android sample Java activity.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/JavaInteropRuntime.javaRemoved Android sample Java runtime loader.
samples/Hello-NativeAOTFromAndroid/app/src/main/AndroidManifest.xmlRemoved Android sample manifest.
samples/Hello-NativeAOTFromAndroid/app/proguard-rules.proRemoved Android sample ProGuard rules.
samples/Hello-NativeAOTFromAndroid/app/build.gradleRemoved Android sample module build script.
samples/Hello-NativeAOTFromAndroid/app/.gitignoreRemoved Android sample ignores.
samples/Hello-NativeAOTFromAndroid/android.xmlRemoved Android sample API XML input.
samples/Hello-NativeAOTFromAndroid/.gitignoreRemoved Android sample ignores.
samples/Hello-Java.Base/Program.csRemoved desktop/JRE-oriented sample program.
samples/Hello-Java.Base/Hello-Java.Base.csprojRemoved desktop/JRE-oriented sample project.
samples/Hello-Core/README.mdRemoved desktop/JRE-oriented sample docs.
samples/Hello-Core/Program.csRemoved desktop/JRE-oriented sample program.
samples/Hello-Core/Hello-Core.csprojRemoved desktop/JRE-oriented sample project.
MakefileUpdated build metadata, but currently still references removed test outputs (needs further adjustment).
.github/copilot-instructions.mdUpdated repository guidance to reflect removed runtime/tests and updated validation commands.
Copilot's findings
  • Files reviewed: 162/178 changed files
  • Comments generated: 1
Comment threadMakefile
Outdated

@simonrozsival
simonrozsivalforce-pushed
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58ec716CompareJune 8, 2026 10:33
@simonrozsival
Fix Makefile test targets after JRE cleanup
a18c60f
Update the Makefile test lists to match the remaining managed test projects and stop building removed desktop/JRE test outputs.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@simonrozsival
simonrozsival
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Jun 8, 2026

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@copilot there seem to be many failing tests, so the PR is still not in good shape:
...
Failed GeneratedOK [48 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.StaticMethods.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/StaticMethods.cs:line 12
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
Failed GeneratedOK [44 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.StaticProperties.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/StaticProperties.cs:line 12
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
Failed GeneratedOK [61 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.Streams.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Streams.cs:line 12

CopilotAIand others
added 2 commits
June 8, 2026 12:09
@simonrozsival
Plan investigation for failing generator tests
ff097ff
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Fix generator-Tests Java.Interop dependency
6fb38a7
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
CopilotAI
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Jun 8, 2026

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@copilot there seem to be many failing tests, so the PR is still not in good shape:
...

...
Fixed in 6fb38a7. I added an explicit ProjectReference to src/Java.Interop/Java.Interop.csproj in tests/generator-Tests/generator-Tests.csproj, so Java.Interop.dll is now copied into bin/Test*-net10.0 for the integration compiler references. I also restored src/Java.Base-ref.cs to the pre-plan state to remove the accidental unrelated delta.
@simonrozsival
simonrozsival
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Jun 8, 2026

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@copilot CI is failing, try to fix it:
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
/Users/runner/hostedtoolcache/dotnet/dotnet test --logger trx;LogFileName=Java.Interop.Dynamic-Tests.trx --results-directory /Users/runner/work/_temp bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll" provided was not found.
##[error]Error: The process '/Users/runner/hostedtoolcache/dotnet/dotnet' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
##[warning]RetryHelper encountered task failure, will retry (attempt #: 1 out of 1) after 1000 ms
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
/Users/runner/hostedtoolcache/dotnet/dotnet test --logger trx;LogFileName=Java.Interop.Dynamic-Tests.trx --results-directory /Users/runner/work/_temp bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll" provided was not found.
##[error]Error: The process '/Users/runner/hostedtoolcache/dotnet/dotnet' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
Finishing: Tests: Java.Interop.Dynamic (.NET - MacOS)

or
The test source file "D:\a\1\s\bin/TestRelease-net10.0/Java.Interop-Tests.dll" provided was not found.
##[error]Error: The process 'C:\hostedtoolcache\windows\dotnet\dotnet.exe' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
##[warning]RetryHelper encountered task failure, will retry (attempt #: 1 out of 1) after 1000 ms
C:\Windows\system32\chcp.com 65001
Active code page: 65001
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
C:\hostedtoolcache\windows\dotnet\dotnet.exe test --logger trx;LogFileName=Java.Interop-Tests.trx --results-directory D:\a\_temp bin/TestRelease-net10.0/Java.Interop-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "D:\a\1\s\bin/TestRelease-net10.0/Java.Interop-Tests.dll" provided was not found.
##[error]Error: The process 'C:\hostedtoolcache\windows\dotnet\dotnet.exe' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
Finishing: Tests: Java.Interop (net10.0 - .NET - Windows)

CopilotAIand others
added 2 commits
June 8, 2026 13:39
@simonrozsival
Plan CI failure investigation
be4124f
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Remove deleted test assemblies from core CI template
c39003a
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
CopilotAI
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Jun 8, 2026

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@copilot CI is failing, try to fix it:
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted...

Fixed in c39003a. I removed the stale run-dotnet-test entries for deleted assemblies (Java.Interop-Tests, Java.Interop.Dynamic-Tests, Java.Interop-PerformanceTests, and Java.Base-Tests) from build-tools/automation/templates/core-tests.yaml, so CI no longer tries to run missing DLLs from bin/TestRelease-net10.0.
@simonrozsival
simonrozsival
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Jun 8, 2026

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@copilot explain why we needed to remove these tests. Does it mean that without the full Java.Runtime.Environment, we can't run Java.Interop tests outside of dotnet/android?
CopilotAI
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Jun 8, 2026

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@copilot explain why we needed to remove these tests. Does it mean that without the full Java.Runtime.Environment, we can't run Java.Interop tests outside of dotnet/android?
Those tests were removed because they depended on the standalone Java.Runtime.Environment host that this PR deletes. Once that runtime path was removed, those assemblies were no longer produced, so keeping their CI entries only caused false red failures.
It does not mean Java.Interop as a whole can only be used with dotnet/android. It means this repo no longer carries the old desktop/JRE-specific runtime host+test harness. The removed test projects specifically exercised that host. To run equivalent runtime tests outside dotnet/android again, we’d need to add and maintain a new supported non-Android host path.
jonathanpeppers
jonathanpeppers
reviewed
Jun 8, 2026
View reviewed changes
Comment threadexternal/xamarin-android-tools
@jonathanpeppers
Revert unintended xamarin-android-tools submodule change
630522e
Co-authored-by: jonathanpeppers <840039+jonathanpeppers@users.noreply.github.com>
CopilotAI
requested a review
from jonathanpeppersJune 8, 2026 16:37
@simonrozsival
Restore Java.Interop tests without JRE runtime
4e2297d
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@simonrozsivalsimonrozsival
changed the title
Remove standalone Java.Runtime.Environment runtime pathRemove Java.Runtime.Environment and keep Java.Interop tests runningJun 9, 2026
CopilotAIand others
added 2 commits
June 22, 2026 08:10
@simonrozsival
Merge remote-tracking branch 'origin/main' into remove-java-runtime-e…
a003dcd
…nvironment
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Implement new abstract JniValueManager members in Hello-NativeAOTFrom…
ed27671
…JNI sample
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
CopilotAI
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Jun 22, 2026

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@copilot update the branch with latest changes from main and fix these build errors:
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoLogo -NoProfile -NonInteractive -ExecutionPoli...

Updated the branch with latest origin/main (clean merge) and fixed the build errors in 81dc (latest commit).
The trimmable-type-map work made several JniRuntime.JniValueManager members abstract (CreatePeer, CreateValueCore, GetValueCore, GetValueMarshalerCore, CreateLocalObjectReferenceArgumentCore, ActivatePeer, ConstructPeerCore). Since this smoke sample never constructs managed peers (it only returns a Java string via raw JNI), I implemented those members in the sample's ValueManager as AOT-safe NotSupportedException stubs rather than reintroducing the reflection-based manager.
Validated:
  • dotnet build samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj -c Release — 0 warnings
  • dotnet publish -r linux-x64 — NativeAOT codegen completes with no IL trim/AOT warnings
  • dotnet test tests/Java.Interop-Tests — 671 passed, 0 failed, 4 skipped
@simonrozsival
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Jun 22, 2026

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@copilot fix failing build:
/usr/local/bin/pwsh -NoLogo -NoProfile -NonInteractive -Command . '/Users/runner/work/_temp/c200f9fa-3322-4cf3-8650-5b7159d65d36.ps1'
Determining projects to restore...
Restored /Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj (in 311 ms).
2 of 3 projects are up-to-date for restore.
Hello from Java!
JavaInteropRuntime.init : error : System.NotSupportedException: Please set CreationOptions.TypeManager! [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
at Java.Interop.JniRuntime..ctor(JniRuntime.CreationOptions) + 0x51e
at libHello-NativeAOTFromJNI!<BaseAddress>+0x78a8c
Unhandled exception. System.NotSupportedException: No available Java runtime to attach to. Please create one.
at Java.Interop.JniRuntime.get_CurrentRuntime() + 0x173
at Java.Interop.JniEnvironmentInfo..ctor() + 0x10
at Java.Interop.JniEnvironment.<>c.<.cctor>b__38_0() + 0x18
at System.Threading.ThreadLocal`1.GetValueSlow() + 0x25
at libHello-NativeAOTFromJNI!<BaseAddress>+0x786d1
/var/folders/d_/7cp7f2xj0m5gcp7ch5j2t7tc0000gn/T/MSBuildTemp/tmpdac8ca75ed214639b541fa75d6ccaa52.exec.cmd: line 2: 9273 Abort trap: 6 "/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App
/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targets(49,5): error MSB3073: The command ""/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App" exited with code 134. [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
Build FAILED.
JavaInteropRuntime.init : error : System.NotSupportedException: Please set CreationOptions.TypeManager! [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targets(49,5): error MSB3073: The command ""/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App" exited with code 134. [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
0 Warning(s)
2 Error(s)
Time Elapsed 00:00:01.68

@simonrozsival
Set CreationOptions.TypeManager in Hello-NativeAOTFromJNI sample runtime
d70097e
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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Jun 22, 2026

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@copilot fix failing build:
/usr/local/bin/pwsh -NoLogo -NoProfile -NonInteractive -Command . '/Users/runner/work/_temp/c200f9fa-3322-4cf3-8650-5b7159d65d36.ps1'

...
Fixed in the latest commit. The sample's ExistingJniRuntime wasn't setting CreationOptions.TypeManager, so JniRuntime's constructor threw NotSupportedException: Please set CreationOptions.TypeManager!. I added TypeManager = new JniRuntime.JniTypeManager () to the CreationOptions (the base JniTypeManager is concrete and AOT-safe — its virtuals return empty, which is sufficient since this smoke sample only returns a Java string via raw JNI and never resolves managed types).
Validated end-to-end on linux-x64: NativeAOT publish + running net/dot/jni/hello/App now prints:
Hello from Java!
Hello from .NET NativeAOT!
String returned to Java: Hello from .NET NativeAOT!

The runtime initializes with no exception.
@simonrozsival
simonrozsival
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Jun 23, 2026

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@copilot fix the following build error:
CSC : error CS1566: Error reading resource 'Xamarin.Android.Tools.BytecodeTests.kotlin-gradle.Widgets.class' -- 'Could not find a part of the path '/Users/runner/work/1/s/tests/Xamarin.Android.Tools.Bytecode-Tests/kotlin-gradle/classes/xat/bytecode/tests/Widgets.class'.' [/Users/runner/work/1/s/tests/Xamarin.Android.Tools.Bytecode-Tests/Xamarin.Android.Tools.Bytecode-Tests.csproj]
0 Warning(s)
1 Error(s)

@simonrozsival
Isolate Kotlin Gradle test outputs per project
697b961
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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@copilot fix the following build error:
...
Fixed in 697b961. The Kotlin/Gradle fixture classes are now generated into each consuming test project's obj/ directory instead of a shared source-tree kotlin-gradle/classes directory, so parallel solution builds no longer race over the embedded Widgets.class resource.
Validated with dotnet build Java.Interop.sln -c Release from clean Kotlin outputs, plus Release builds/tests for Xamarin.Android.Tools.Bytecode-Tests and generator-Tests.
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Jun 23, 2026

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🤖 Code Review — ✅ LGTM (with minor suggestions)
This is a clean, well-executed removal of the Java.Runtime.Environment project. The test-host runtime plumbing it provided (value/object-reference managers, JVM creation) is faithfully re-homed into tests/TestJVM/TestJVM.cs, the NativeAOT sample is made self-contained, and the native build is reworked to a static validation lib. CI is green (build + full Java.Interop test suite pass).
I diffed the ported ManagedValueManager / ManagedObjectReferenceManager against the deleted originals and verified:
  • gref/wgref counting is correct (incrementing on a valid result, decrementing on a valid input ref is the right asymmetry);
  • CreateJVM resource handling is sound — Dispose is idempotent, so the LoadJvmLibrary-throws path doesn't double-free;
  • the JavaVMInitArgs / JavaVMOption struct layouts (blittable, sequential) and the JNI_CreateJavaVMdelegate* unmanaged<...> signature match the JNI ABI.
I also confirmed there are no dangling references to the removed projects in the solution, Makefile, CI templates, or Sdk.targets, and that Hello-NativeAOTFromJNI (kept) is still exercised via the dedicated dotnet publish CI step rather than the solution.
Findings (non-blocking)
  • 💡 Documentation — tests/TestJVM/TestJVM.cs:478: the "why" comment about the Local-ref / SafeHandle.ReferenceType thread-locality invariant was dropped during the port.
  • 💡 MSBuild — samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj:41: hardcoded MacOSX15.sdk path will silently stop applying on future SDKs.
Nice touches
  • JniRuntimeJniValueManagerContract now binds the generic <ManagedValueManager> instead of Type.GetType("...Java.Runtime.Environment...") reflection — trimmer/AOT-friendly.
  • src/java-interop/CMakeLists.txt fixes a pre-existing foreach(dir in ${...}) syntax bug.
  • Makefilerun-net-tests gains the missing ; so every test assembly in the loop actually runs.
Verdict: ✅ LGTM — 0 ❌ · 0 ⚠️ · 2 💡. The two suggestions are optional and don't block merge.
Generated by Java.Interop PR Reviewer for issue #1447 · 2.5K AIC · ⌖ 46.9 AIC · ⊞ 34.6K
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Comment threadtests/TestJVM/TestJVM.cs
Comment threadsamples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj
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@jonathanpeppers
Merge origin/main and address review feedback
eea9765
- Resolve merge conflicts with main by keeping deletions of:
- samples/Hello-NativeAOTFromAndroid/NativeAotTypeManager.cs
- samples/Hello-NativeAOTFromJNI/NativeAotTypeManager.cs
- src/Java.Runtime.Environment/Java.Interop/JreTypeManager.cs
- Address review comments from PR 1447:
- Restore the "why" comment on ManagedValueManager.FinalizePeer
explaining why we use JniObjectReference.Type instead of
SafeHandle.ReferenceType (the latter is thread-local and returns
Invalid off-thread for Local refs).
- Replace the hard-coded MacOSX15.sdk -isysroot path in
Hello-NativeAOTFromJNI.csproj with a target that resolves the
macOS SDK dynamically via `xcrun --show-sdk-path`, so it keeps
working on newer SDKs and on machines with full Xcode installed.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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🤖 Code Review — Remove Java.Runtime.Environment, keep Java.Interop tests running
Verdict: ✅ Looks good — minor suggestions only (posting as a COMMENT, not an approval).
This is a careful, well-scoped refactor. I read the full tests/TestJVM/TestJVM.cs and diffed the new value/reference managers against the deleted Java.Runtime.Environment originals — the port is faithful. Things I independently verified:
  • ✅ The new CreateJVM / NativeLibraryJvmLibraryHandler JVM-bootstrap path is correct: the JNI_CreateJavaVM function-pointer signature (out IntPtr, out IntPtr, ref JavaVMInitArgs) maps to JavaVM** / void** / void*; marshaled option strings are freed in finally; and the library handle is disposed on every failure path (no double-dispose, LibraryHandler nulled on error).
  • ✅ JavaVMInitArgs.version is a 4-byte int-backed JniVersion enum, matching jint; struct field order matches the JNI layout.
  • ✅ JDK_OnlySupportsOneVM expects NotSupportedException, which CreateJVM throws on r != 0; the InvocationPointer-only path correctly short-circuits before creating a second VM.
  • ✅ Swapping Type.GetType ("..., Java.Runtime.Environment", throwOnError) for JniRuntimeJniValueManagerContract<ManagedValueManager> removes a reflection/trimming hazard — a nice trimmer/AOT win, and it justifies making ManagedValueManager public.
  • ✅ App.cs's sayHello uses JniTransition with proper try/catch/finally; JavaInteropRuntime.init intentionally avoids JniTransition (the runtime isn't initialized yet) and logs instead — both correct.
  • ✅ Remaining product-code edits (obsolete message text, InternalsVisibleTo removal, generator/JniPeerMembers comment cleanup, CMake/targets/Makefile/sln updates) are pure cleanup of references to the deleted assembly.
Issue counts: 0 ❌ · 0 ⚠️ · 2 💡 (both inline, non-blocking)
⚠️ CI not yet green: at review time only license/cla has completed — the dotnet.java-interop Azure build is still queued, so I can't independently confirm the build/tests pass. The PR description reports 669 passed, 0 failed, 4 skipped locally; please make sure the Azure build goes green before merging.
Note on scope: this PR intentionally removes Java.Base / Java.Runtime.Environment, the samples, and the performance/dynamic test suites, so that coverage goes away by design — the retained Java.Interop-Tests still exercise the core runtime through the rehosted TestJVM.
Thanks for the detailed description and the explicit "kept vs. removed" breakdown — it made reviewing 39k deleted lines tractable. Two small 💡 suggestions inline; nothing blocking.
Generated by Java.Interop PR Reviewer for issue #1447 · 1.7K AIC · ⌖ 49.6 AIC · ⊞ 34.6K
Comment /review to run again
Comment threadtests/TestJVM/TestJVM.cs
Comment threadtests/TestJVM/TestJVM.cs
jonathanpeppersand others
added 2 commits
June 26, 2026 08:12
@jonathanpeppers
Fix invalid -- in XML comment in Hello-NativeAOTFromJNI.csproj
aed3c97
XML comments cannot contain --, which broke MSBuild parsing of the
csproj on CI. Reword the comment to drop the literal --show-sdk-path`nflag reference so the project loads again.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppers
Sync Hello-NativeAOTFromJNI ValueManager DAM attributes with base
54ef878
PR #1481 (merged into main after this PR opened) removed some
[DynamicallyAccessedMembers] attributes from the base
JniRuntime.JniValueManager abstract methods. After merging main,
the sample's overrides still had the old DAM attributes, producing
IL2092/IL2095 'overridden members must have the same
DynamicallyAccessedMembersAttribute usage' errors when publishing
for NativeAOT.
Drop DAM from the sample overrides to match the new base signatures:
- ActivatePeer (Type type, ...)
- GetValueMarshalerCore<T> ()
- CreateLocalObjectReferenceArgumentCore (Type type, ...)
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppers
jonathanpeppers
merged commit 4e14244
into
mainJun 26, 2026

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@jonathanpeppers
jonathanpeppers
deleted the

remove-java-runtime-environment

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June 26, 2026 15:19
jonathanpeppers added a commit
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Jun 30, 2026
@jonathanpeppers
Remove Java.Runtime.Environment project from solution
871a945
The Java.Runtime.Environment project was removed upstream in dotnet/java-interop#1447 (commit 4e142449), so the reference in Xamarin.Android.sln no longer resolves and breaks restore.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
jonathanpeppers added a commit
to dotnet/android
that referenced
this pull request
Jul 1, 2026
@dependabot@jonathanpeppers
Bump todotnet/java-interop@6ec1345(#11782)
ad3f04b
### Bump external/Java.Interop from `8d54473` to `6ec1345`
Bumps [external/Java.Interop](https://github.com/dotnet/java-interop) from `8d54473` to `6ec1345`.
- [Commits](dotnet/java-interop@8d54473...6ec1345)
---
updated-dependencies:
- dependency-name: external/Java.Interop
dependency-version: 6ec1345165fa7385c935f16ccaa8cc38be50a080
dependency-type: direct:production
...
### Remove Java.Runtime.Environment project from solution
The Java.Runtime.Environment project was removed upstream in dotnet/java-interop#1447 (commit 4e142449), so the reference in Xamarin.Android.sln no longer resolves and breaks restore.
### Suppress new IL3050 warnings in ManagedTypeManager
Upstream dotnet/java-interop#1474 added [RequiresDynamicCode] to:
- JniRuntime.ReflectionJniTypeManager (the class), surfacing IL3050 at ManagedTypeManager..ctor() since we derive from it.
- JniEnvironment.Types.RegisterNatives(.., JniNativeMethodRegistration[], int), surfacing IL3050 at ManagedTypeManager.RegisterNativeMembers.
Suppress for now; the JniNativeMethodRegistration[] registration path will be migrated to the blittable RegisterNatives(JniObjectReference, ReadOnlySpan<JniNativeMethod>) overload in a future change.
Co-authored-by: Jonathan Peppers <jonathan.peppers@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppersjonathanpeppers
mentioned this pull request
Jul 6, 2026
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Remove Java.Runtime.Environment and keep Java.Interop tests running - #1447
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remove-java-runtime-environment
Jun 26, 2026
Merged
Remove Java.Runtime.Environment and keep Java.Interop tests running#1447
jonathanpeppers merged 34 commits into
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remove-java-runtime-environment
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@simonrozsival
@simonrozsivalsimonrozsival
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Related to dotnet/android#11843
Summary
  • Remove the standalone src/Java.Runtime.Environment project and the desktop/JRE runtime path it provided.
  • Remove the samples, performance tests, dynamic tests, and Java.Base tests that depended on the old standalone runtime surface.
  • Keep Java.Interop-Tests in the solution and CI, and restore them to a passing state without bringing back the Java.Runtime.Environment assembly.
  • Remove the Java.Runtime.Environment friend-assembly dependency from Java.Interop; keep only the Java.Interop-Tests friend access needed by the restored tests.
  • Trim src/java-interop down to the native source subset still consumed by dotnet/android, while keeping a minimal validation project so those sources continue to compile in this repo.
  • Keep a minimal Hello-NativeAOTFromJNI smoke sample that proves Java can load a NativeAOT library, initialize JniRuntime from an existing JNIEnv*, and call into a native C# method.
Note on tests/TestJVM/TestJVM.cs
This file intentionally grew because it now owns the small amount of JVM-hosting/runtime plumbing that Java.Interop-Tests still need after deleting Java.Runtime.Environment.
The new code is test-only and replaces the old TestJVM : JreRuntime dependency with a direct TestJVM : JniRuntime host. It keeps only the pieces needed by the core tests:
  • JNI_CreateJavaVM loading through NativeLibrary
  • classpath setup for java-interop.jar and interop-test.jar
  • JDK/JVM path discovery from JdkInfo.props or installed JDKs
  • a minimal object reference manager for global/weak-global reference counts
  • a minimal managed value manager for peer registration/lookup/finalization
  • a test type manager for the explicit Java type mappings used by the suite
It deliberately does not reintroduce the old product/runtime API surface such as JreRuntime, JreRuntimeOptions, Mono runtime managers, standalone runtime packaging, reference-log plumbing, or the native java-interop JVM loader path. The restored tests/test host have no remaining Java.Runtime.Environment references.
Note on samples/Hello-NativeAOTFromJNI
The old sample depended on Java.Runtime.Environment, so this PR restores it as a smaller smoke test instead of bringing back the old sample wholesale.
The new sample:
  • publishes a NativeAOT shared library,
  • lets Java load it with System.loadLibrary("Hello-NativeAOTFromJNI"),
  • initializes a sample-local JniRuntime from the existing JNIEnv*, and
  • calls a native C# sayHello() method that returns a Java string.
It does not exercise managed peer construction or generated JCWs; those can be added later with explicit support if we want a broader NativeAOT/JNI sample.
Validation
  • dotnet build -t:Prepare
  • dotnet build src/java-interop/java-interop.csproj
  • dotnet build src/Java.Interop/Java.Interop.csproj --no-restore
  • dotnet build tests/Java.Interop-Tests/Java.Interop-Tests.csproj --no-restore
  • dotnet test tests/Java.Interop-Tests/Java.Interop-Tests.csproj --no-build — 669 passed, 0 failed, 4 skipped
  • dotnet publish -c Release -r osx-arm64 samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj
  • dotnet build -c Release -r osx-arm64 -t:RunJavaSample samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj --no-restore
CopilotAI
review requested due to automatic review settings
June 8, 2026 10:23
@simonrozsival
Remove Java.Runtime.Environment runtime path
97ce2d3
Remove the standalone JRE runtime project and its sample/test consumers from the Java.Interop submodule. This keeps the core Java.Interop build path while dropping the desktop/JRE-oriented runtime pieces that are not needed by the main Android SDK.
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Pull request overview
This PR removes the standalone Java.Runtime.Environment project and its desktop/JRE-oriented test & sample consumers, and updates build/docs metadata to reflect the cleanup and discourage desktop-specific runtime helper usage at the Java.Interop layer.
Changes:
  • Removed src/Java.Runtime.Environment and all dependent test/sample projects that were built around a standalone desktop/JRE runtime.
  • Removed JVM-based test suites and performance/overhead benchmarks that depended on the removed runtime path.
  • Updated JniRuntime.GetAvailableInvocationPointers() obsolete guidance, the repo Makefile, and .github/copilot-instructions.md to align with the new shape.
Show a summary per file
FileDescription
tests/TestJVM/TestJVM.csprojRemoved TestJVM helper project (desktop/JRE runtime dependency).
tests/TestJVM/TestJVM.csRemoved TestJVM helper runtime implementation.
tests/Java.Interop.Dynamic-Tests/Java.Interop/JavaVMFixture.csRemoved Dynamic test fixture relying on TestJVM/JRE runtime.
tests/Java.Interop.Dynamic-Tests/Java.Interop/DynamicJavaInstanceTests.csRemoved Dynamic JVM-based test coverage.
tests/Java.Interop.Dynamic-Tests/Java.Interop/DynamicJavaClassTests.csRemoved Dynamic JVM-based test coverage.
tests/Java.Interop.Dynamic-Tests/Java.Interop.Dynamic-Tests.csprojRemoved Dynamic test project and its JRE runtime references.
tests/Java.Interop-Tests/java/net/dot/jni/test/TestType.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/SelfRegistration.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassDerived.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassBase2.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassBase1.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RegisterNativesTestType.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/ObjectHelper.javaRemoved Java-side helper used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/MyJavaInterfaceImpl.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/JavaInterface.javaRemoved Java-side interface used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/GetThis.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/DesugarAndroidInterface$_CC.javaRemoved Java-side desugar test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CrossReferenceBridge.javaRemoved Java-side GC bridge/cross-ref test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallVirtualFromConstructorDerived.javaRemoved Java-side constructor-virtual-call test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallVirtualFromConstructorBase.javaRemoved Java-side constructor-virtual-call test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualDerived2.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualDerived.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualBase.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/AnotherJavaInterfaceImpl.javaRemoved Java-side interface impl used by tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/AndroidInterface.javaRemoved Java-side interface used for desugar-related tests.
tests/Java.Interop-Tests/Java.Interop/TestTypeTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/SelfRegistrationTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/SelfRegistration.csRemoved managed type used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/MethodBindingTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniValueMarshalerAttributeTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTypeSignatureTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTypeSignatureAttributeTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTransitionTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntimeTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntime.JniValueManagerTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntime.JniTypeManagerTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniReferenceSafeHandleTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniMarshalTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniInstanceMethodIDTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniEnvironmentTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JavaVMFixture.Partial.csRemoved JVM fixture scaffolding.
tests/Java.Interop-Tests/Java.Interop/JavaVMFixture.csRemoved JVM fixture setup & type-manager mapping logic.
tests/Java.Interop-Tests/Java.Interop/JavaSingleArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaSByteArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaPrimitiveArrayContract.csRemoved JVM-based contract test base class.
tests/Java.Interop-Tests/Java.Interop/JavaPeerableExtensionsTests.csRemoved JVM-based extension tests and related managed bindings.
tests/Java.Interop-Tests/Java.Interop/JavaObjectExtensionsTests.csRemoved JVM-based extension tests.
tests/Java.Interop-Tests/Java.Interop/JavaObjectArrayTest.csRemoved JVM-based object array contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaManagedGCBridgeTests.csRemoved JVM-based GC bridge tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt64ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt32ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt16ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaExceptionTests.csRemoved JVM-based exception interop tests.
tests/Java.Interop-Tests/Java.Interop/JavaDoubleArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaCharArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaBooleanArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaArrayContract.csRemoved JVM-based contract test base class.
tests/Java.Interop-Tests/Java.Interop/InvokeVirtualFromConstructorTests.csRemoved JVM-based constructor dispatch tests.
tests/Java.Interop-Tests/Java.Interop/GetThis.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/FinalizerHelpers.csRemoved helper used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallVirtualFromConstructorDerived.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallVirtualFromConstructorBase.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualDerived2.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualDerived.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualBase.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop-Tests.targetsRemoved MSBuild logic for building interop-test.jar and JCWs.
tests/Java.Interop-Tests/Java.Interop-Tests.csprojRemoved JVM-based Java.Interop test project.
tests/Java.Interop-Tests/Cadenza/BaseRocksFixture.csRemoved Cadenza test fixture that depended on JavaVMFixture.
tests/Java.Interop-Tests/Cadenza.Collections/ListContract.csRemoved Cadenza collection contract tests.
tests/Java.Interop-Tests/Cadenza.Collections/EnumerableContract.csRemoved Cadenza enumerable contract tests.
tests/Java.Interop-PerformanceTests/java/com/xamarin/interop/performance/JavaTiming.javaRemoved Java-side performance benchmark fixture.
tests/Java.Interop-PerformanceTests/Java.Interop/JavaVMFixture.csRemoved perf test fixture relying on TestJVM.
tests/Java.Interop-PerformanceTests/Java.Interop/JavaPrimitiveArraysTiming.csRemoved perf tests and benchmark helpers.
tests/Java.Interop-PerformanceTests/Java.Interop-PerformanceTests.targetsRemoved perf test JAR build target.
tests/Java.Interop-PerformanceTests/Java.Interop-PerformanceTests.csprojRemoved performance test project.
tests/Java.Base-Tests/java/net/dot/jni/test/PublicInterface.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/net/dot/jni/test/InterfaceMethodInheritance.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/net/dot/jni/test/HasInterfaceMethodInheritance.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/com/microsoft/java_base_tests/Invoker.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/Java.Base/NestedTypeTests.csRemoved Java.Base JVM-based tests.
tests/Java.Base-Tests/Java.Base/JniRuntimeJniValueManagerContractExtras.csRemoved Java.Base JVM-based tests.
tests/Java.Base-Tests/Java.Base/JavaVMFixture.Partial.csRemoved Java.Base test fixture scaffolding.
tests/Java.Base-Tests/Java.Base/JavaVMFixture.csRemoved Java.Base fixture setup using TestJVM.
tests/Java.Base-Tests/Java.Base/JavaToManagedTests.csRemoved Java→managed callback tests.
tests/Java.Base-Tests/Java.Base/InterfaceMethodInheritanceTests.csRemoved interface inheritance tests.
tests/Java.Base-Tests/Java.Base-Tests.targetsRemoved Java.Base test targets.
tests/Java.Base-Tests/Java.Base-Tests.csprojRemoved Java.Base test project.
tests/invocation-overhead/README.mdRemoved standalone invocation-overhead benchmark documentation.
tests/invocation-overhead/MakefileRemoved invocation-overhead build helpers.
tests/invocation-overhead/invocation-overhead.targetsRemoved invocation-overhead MSBuild targets.
tests/invocation-overhead/invocation-overhead.csprojRemoved invocation-overhead benchmark project.
src/Java.Runtime.Environment/Properties/AssemblyInfo.csRemoved standalone runtime assembly configuration.
src/Java.Runtime.Environment/Java.Runtime.Environment.targetsRemoved standalone runtime MSBuild logic.
src/Java.Runtime.Environment/Java.Runtime.Environment.dll.config.inRemoved template for dllmap config generation.
src/Java.Runtime.Environment/Java.Runtime.Environment.csprojRemoved standalone runtime project.
src/Java.Runtime.Environment/Java.Interop/JreTypeManager.csRemoved JRE-specific type manager implementation.
src/Java.Runtime.Environment/.gitignoreRemoved ignore entry for generated runtime config.
src/Java.Interop/Properties/AssemblyInfo.csRemoved InternalsVisibleTo entries for deleted assemblies/tests.
src/Java.Interop/Java.Interop/JniRuntime.csUpdated obsolete guidance to avoid referencing removed desktop runtime helpers.
samples/Hello-NativeAOTFromJNI/README.mdRemoved desktop/JRE-oriented sample docs.
samples/Hello-NativeAOTFromJNI/NativeAotTypeManager.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/ManagedType.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/JavaInteropRuntime.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/JavaCallableAttributes.csRemoved sample-only callable attribute definitions.
samples/Hello-NativeAOTFromJNI/java/net/dot/jni/hello/JavaInteropRuntime.javaRemoved Java launcher/runtime sample code.
samples/Hello-NativeAOTFromJNI/java/net/dot/jni/hello/App.javaRemoved Java launcher sample code.
samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targetsRemoved sample build targets (JCW + jar).
samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csprojRemoved NativeAOT-from-JNI sample project.
samples/Hello-NativeAOTFromJNI/App.csRemoved sample native entrypoint code.
samples/Hello-NativeAOTFromAndroid/Transforms/Metadata.xmlRemoved Android NativeAOT sample transform metadata.
samples/Hello-NativeAOTFromAndroid/settings.gradleRemoved Android NativeAOT Gradle settings.
samples/Hello-NativeAOTFromAndroid/NativeAotTypeManager.csRemoved Android NativeAOT sample type manager.
samples/Hello-NativeAOTFromAndroid/MainActivity.csRemoved Android NativeAOT managed activity sample.
samples/Hello-NativeAOTFromAndroid/LogcatTextWriter.csRemoved Android NativeAOT logging helper.
samples/Hello-NativeAOTFromAndroid/JavaInteropRuntime.csRemoved Android NativeAOT runtime init code.
samples/Hello-NativeAOTFromAndroid/Hello-NativeAOTFromAndroid.csprojRemoved Android NativeAOT sample project.
samples/Hello-NativeAOTFromAndroid/gradle.propertiesRemoved Android NativeAOT sample config.
samples/Hello-NativeAOTFromAndroid/build.gradleRemoved Android NativeAOT sample build script.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/values/strings.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/layout/activity_main.xmlRemoved Android sample layout.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/drawable/ic_launcher_background.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/drawable-v24/ic_launcher_foreground.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/NativeAotRuntimeProvider.javaRemoved Android sample Java bootstrapping.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/JavaMainActivity.javaRemoved Android sample Java activity.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/JavaInteropRuntime.javaRemoved Android sample Java runtime loader.
samples/Hello-NativeAOTFromAndroid/app/src/main/AndroidManifest.xmlRemoved Android sample manifest.
samples/Hello-NativeAOTFromAndroid/app/proguard-rules.proRemoved Android sample ProGuard rules.
samples/Hello-NativeAOTFromAndroid/app/build.gradleRemoved Android sample module build script.
samples/Hello-NativeAOTFromAndroid/app/.gitignoreRemoved Android sample ignores.
samples/Hello-NativeAOTFromAndroid/android.xmlRemoved Android sample API XML input.
samples/Hello-NativeAOTFromAndroid/.gitignoreRemoved Android sample ignores.
samples/Hello-Java.Base/Program.csRemoved desktop/JRE-oriented sample program.
samples/Hello-Java.Base/Hello-Java.Base.csprojRemoved desktop/JRE-oriented sample project.
samples/Hello-Core/README.mdRemoved desktop/JRE-oriented sample docs.
samples/Hello-Core/Program.csRemoved desktop/JRE-oriented sample program.
samples/Hello-Core/Hello-Core.csprojRemoved desktop/JRE-oriented sample project.
MakefileUpdated build metadata, but currently still references removed test outputs (needs further adjustment).
.github/copilot-instructions.mdUpdated repository guidance to reflect removed runtime/tests and updated validation commands.
Copilot's findings
  • Files reviewed: 162/178 changed files
  • Comments generated: 1
Comment threadMakefile
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@simonrozsival
simonrozsivalforce-pushed
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58ec716CompareJune 8, 2026 10:33
@simonrozsival
Fix Makefile test targets after JRE cleanup
a18c60f
Update the Makefile test lists to match the remaining managed test projects and stop building removed desktop/JRE test outputs.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@simonrozsival
simonrozsival
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Jun 8, 2026

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@copilot there seem to be many failing tests, so the PR is still not in good shape:
...
Failed GeneratedOK [48 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.StaticMethods.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/StaticMethods.cs:line 12
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
Failed GeneratedOK [44 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.StaticProperties.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/StaticProperties.cs:line 12
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
Failed GeneratedOK [61 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.Streams.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Streams.cs:line 12

CopilotAIand others
added 2 commits
June 8, 2026 12:09
@simonrozsival
Plan investigation for failing generator tests
ff097ff
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Fix generator-Tests Java.Interop dependency
6fb38a7
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
CopilotAI
commented
Jun 8, 2026

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@copilot there seem to be many failing tests, so the PR is still not in good shape:
...

...
Fixed in 6fb38a7. I added an explicit ProjectReference to src/Java.Interop/Java.Interop.csproj in tests/generator-Tests/generator-Tests.csproj, so Java.Interop.dll is now copied into bin/Test*-net10.0 for the integration compiler references. I also restored src/Java.Base-ref.cs to the pre-plan state to remove the accidental unrelated delta.
@simonrozsival
simonrozsival
commented
Jun 8, 2026

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@copilot CI is failing, try to fix it:
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
/Users/runner/hostedtoolcache/dotnet/dotnet test --logger trx;LogFileName=Java.Interop.Dynamic-Tests.trx --results-directory /Users/runner/work/_temp bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll" provided was not found.
##[error]Error: The process '/Users/runner/hostedtoolcache/dotnet/dotnet' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
##[warning]RetryHelper encountered task failure, will retry (attempt #: 1 out of 1) after 1000 ms
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
/Users/runner/hostedtoolcache/dotnet/dotnet test --logger trx;LogFileName=Java.Interop.Dynamic-Tests.trx --results-directory /Users/runner/work/_temp bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll" provided was not found.
##[error]Error: The process '/Users/runner/hostedtoolcache/dotnet/dotnet' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
Finishing: Tests: Java.Interop.Dynamic (.NET - MacOS)

or
The test source file "D:\a\1\s\bin/TestRelease-net10.0/Java.Interop-Tests.dll" provided was not found.
##[error]Error: The process 'C:\hostedtoolcache\windows\dotnet\dotnet.exe' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
##[warning]RetryHelper encountered task failure, will retry (attempt #: 1 out of 1) after 1000 ms
C:\Windows\system32\chcp.com 65001
Active code page: 65001
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
C:\hostedtoolcache\windows\dotnet\dotnet.exe test --logger trx;LogFileName=Java.Interop-Tests.trx --results-directory D:\a\_temp bin/TestRelease-net10.0/Java.Interop-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "D:\a\1\s\bin/TestRelease-net10.0/Java.Interop-Tests.dll" provided was not found.
##[error]Error: The process 'C:\hostedtoolcache\windows\dotnet\dotnet.exe' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
Finishing: Tests: Java.Interop (net10.0 - .NET - Windows)

CopilotAIand others
added 2 commits
June 8, 2026 13:39
@simonrozsival
Plan CI failure investigation
be4124f
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Remove deleted test assemblies from core CI template
c39003a
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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@copilot CI is failing, try to fix it:
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted...

Fixed in c39003a. I removed the stale run-dotnet-test entries for deleted assemblies (Java.Interop-Tests, Java.Interop.Dynamic-Tests, Java.Interop-PerformanceTests, and Java.Base-Tests) from build-tools/automation/templates/core-tests.yaml, so CI no longer tries to run missing DLLs from bin/TestRelease-net10.0.
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Jun 8, 2026

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@copilot explain why we needed to remove these tests. Does it mean that without the full Java.Runtime.Environment, we can't run Java.Interop tests outside of dotnet/android?
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Jun 8, 2026

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@copilot explain why we needed to remove these tests. Does it mean that without the full Java.Runtime.Environment, we can't run Java.Interop tests outside of dotnet/android?
Those tests were removed because they depended on the standalone Java.Runtime.Environment host that this PR deletes. Once that runtime path was removed, those assemblies were no longer produced, so keeping their CI entries only caused false red failures.
It does not mean Java.Interop as a whole can only be used with dotnet/android. It means this repo no longer carries the old desktop/JRE-specific runtime host+test harness. The removed test projects specifically exercised that host. To run equivalent runtime tests outside dotnet/android again, we’d need to add and maintain a new supported non-Android host path.
jonathanpeppers
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Jun 8, 2026
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Comment threadexternal/xamarin-android-tools
@jonathanpeppers
Revert unintended xamarin-android-tools submodule change
630522e
Co-authored-by: jonathanpeppers <840039+jonathanpeppers@users.noreply.github.com>
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from jonathanpeppersJune 8, 2026 16:37
@simonrozsival
Restore Java.Interop tests without JRE runtime
4e2297d
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@simonrozsivalsimonrozsival
changed the title
Remove standalone Java.Runtime.Environment runtime pathRemove Java.Runtime.Environment and keep Java.Interop tests runningJun 9, 2026
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added 2 commits
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Merge remote-tracking branch 'origin/main' into remove-java-runtime-e…
a003dcd
…nvironment
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Implement new abstract JniValueManager members in Hello-NativeAOTFrom…
ed27671
…JNI sample
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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@copilot update the branch with latest changes from main and fix these build errors:
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoLogo -NoProfile -NonInteractive -ExecutionPoli...

Updated the branch with latest origin/main (clean merge) and fixed the build errors in 81dc (latest commit).
The trimmable-type-map work made several JniRuntime.JniValueManager members abstract (CreatePeer, CreateValueCore, GetValueCore, GetValueMarshalerCore, CreateLocalObjectReferenceArgumentCore, ActivatePeer, ConstructPeerCore). Since this smoke sample never constructs managed peers (it only returns a Java string via raw JNI), I implemented those members in the sample's ValueManager as AOT-safe NotSupportedException stubs rather than reintroducing the reflection-based manager.
Validated:
  • dotnet build samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj -c Release — 0 warnings
  • dotnet publish -r linux-x64 — NativeAOT codegen completes with no IL trim/AOT warnings
  • dotnet test tests/Java.Interop-Tests — 671 passed, 0 failed, 4 skipped
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Jun 22, 2026

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@copilot fix failing build:
/usr/local/bin/pwsh -NoLogo -NoProfile -NonInteractive -Command . '/Users/runner/work/_temp/c200f9fa-3322-4cf3-8650-5b7159d65d36.ps1'
Determining projects to restore...
Restored /Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj (in 311 ms).
2 of 3 projects are up-to-date for restore.
Hello from Java!
JavaInteropRuntime.init : error : System.NotSupportedException: Please set CreationOptions.TypeManager! [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
at Java.Interop.JniRuntime..ctor(JniRuntime.CreationOptions) + 0x51e
at libHello-NativeAOTFromJNI!<BaseAddress>+0x78a8c
Unhandled exception. System.NotSupportedException: No available Java runtime to attach to. Please create one.
at Java.Interop.JniRuntime.get_CurrentRuntime() + 0x173
at Java.Interop.JniEnvironmentInfo..ctor() + 0x10
at Java.Interop.JniEnvironment.<>c.<.cctor>b__38_0() + 0x18
at System.Threading.ThreadLocal`1.GetValueSlow() + 0x25
at libHello-NativeAOTFromJNI!<BaseAddress>+0x786d1
/var/folders/d_/7cp7f2xj0m5gcp7ch5j2t7tc0000gn/T/MSBuildTemp/tmpdac8ca75ed214639b541fa75d6ccaa52.exec.cmd: line 2: 9273 Abort trap: 6 "/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App
/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targets(49,5): error MSB3073: The command ""/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App" exited with code 134. [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
Build FAILED.
JavaInteropRuntime.init : error : System.NotSupportedException: Please set CreationOptions.TypeManager! [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targets(49,5): error MSB3073: The command ""/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App" exited with code 134. [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
0 Warning(s)
2 Error(s)
Time Elapsed 00:00:01.68

@simonrozsival
Set CreationOptions.TypeManager in Hello-NativeAOTFromJNI sample runtime
d70097e
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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Jun 22, 2026

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@copilot fix failing build:
/usr/local/bin/pwsh -NoLogo -NoProfile -NonInteractive -Command . '/Users/runner/work/_temp/c200f9fa-3322-4cf3-8650-5b7159d65d36.ps1'

...
Fixed in the latest commit. The sample's ExistingJniRuntime wasn't setting CreationOptions.TypeManager, so JniRuntime's constructor threw NotSupportedException: Please set CreationOptions.TypeManager!. I added TypeManager = new JniRuntime.JniTypeManager () to the CreationOptions (the base JniTypeManager is concrete and AOT-safe — its virtuals return empty, which is sufficient since this smoke sample only returns a Java string via raw JNI and never resolves managed types).
Validated end-to-end on linux-x64: NativeAOT publish + running net/dot/jni/hello/App now prints:
Hello from Java!
Hello from .NET NativeAOT!
String returned to Java: Hello from .NET NativeAOT!

The runtime initializes with no exception.
@simonrozsival
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Jun 23, 2026

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@copilot fix the following build error:
CSC : error CS1566: Error reading resource 'Xamarin.Android.Tools.BytecodeTests.kotlin-gradle.Widgets.class' -- 'Could not find a part of the path '/Users/runner/work/1/s/tests/Xamarin.Android.Tools.Bytecode-Tests/kotlin-gradle/classes/xat/bytecode/tests/Widgets.class'.' [/Users/runner/work/1/s/tests/Xamarin.Android.Tools.Bytecode-Tests/Xamarin.Android.Tools.Bytecode-Tests.csproj]
0 Warning(s)
1 Error(s)

@simonrozsival
Isolate Kotlin Gradle test outputs per project
697b961
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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Jun 23, 2026

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@copilot fix the following build error:
...
Fixed in 697b961. The Kotlin/Gradle fixture classes are now generated into each consuming test project's obj/ directory instead of a shared source-tree kotlin-gradle/classes directory, so parallel solution builds no longer race over the embedded Widgets.class resource.
Validated with dotnet build Java.Interop.sln -c Release from clean Kotlin outputs, plus Release builds/tests for Xamarin.Android.Tools.Bytecode-Tests and generator-Tests.
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🤖 Code Review — ✅ LGTM (with minor suggestions)
This is a clean, well-executed removal of the Java.Runtime.Environment project. The test-host runtime plumbing it provided (value/object-reference managers, JVM creation) is faithfully re-homed into tests/TestJVM/TestJVM.cs, the NativeAOT sample is made self-contained, and the native build is reworked to a static validation lib. CI is green (build + full Java.Interop test suite pass).
I diffed the ported ManagedValueManager / ManagedObjectReferenceManager against the deleted originals and verified:
  • gref/wgref counting is correct (incrementing on a valid result, decrementing on a valid input ref is the right asymmetry);
  • CreateJVM resource handling is sound — Dispose is idempotent, so the LoadJvmLibrary-throws path doesn't double-free;
  • the JavaVMInitArgs / JavaVMOption struct layouts (blittable, sequential) and the JNI_CreateJavaVMdelegate* unmanaged<...> signature match the JNI ABI.
I also confirmed there are no dangling references to the removed projects in the solution, Makefile, CI templates, or Sdk.targets, and that Hello-NativeAOTFromJNI (kept) is still exercised via the dedicated dotnet publish CI step rather than the solution.
Findings (non-blocking)
  • 💡 Documentation — tests/TestJVM/TestJVM.cs:478: the "why" comment about the Local-ref / SafeHandle.ReferenceType thread-locality invariant was dropped during the port.
  • 💡 MSBuild — samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj:41: hardcoded MacOSX15.sdk path will silently stop applying on future SDKs.
Nice touches
  • JniRuntimeJniValueManagerContract now binds the generic <ManagedValueManager> instead of Type.GetType("...Java.Runtime.Environment...") reflection — trimmer/AOT-friendly.
  • src/java-interop/CMakeLists.txt fixes a pre-existing foreach(dir in ${...}) syntax bug.
  • Makefilerun-net-tests gains the missing ; so every test assembly in the loop actually runs.
Verdict: ✅ LGTM — 0 ❌ · 0 ⚠️ · 2 💡. The two suggestions are optional and don't block merge.
Generated by Java.Interop PR Reviewer for issue #1447 · 2.5K AIC · ⌖ 46.9 AIC · ⊞ 34.6K
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Comment threadtests/TestJVM/TestJVM.cs
Comment threadsamples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj
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@jonathanpeppers
Merge origin/main and address review feedback
eea9765
- Resolve merge conflicts with main by keeping deletions of:
- samples/Hello-NativeAOTFromAndroid/NativeAotTypeManager.cs
- samples/Hello-NativeAOTFromJNI/NativeAotTypeManager.cs
- src/Java.Runtime.Environment/Java.Interop/JreTypeManager.cs
- Address review comments from PR 1447:
- Restore the "why" comment on ManagedValueManager.FinalizePeer
explaining why we use JniObjectReference.Type instead of
SafeHandle.ReferenceType (the latter is thread-local and returns
Invalid off-thread for Local refs).
- Replace the hard-coded MacOSX15.sdk -isysroot path in
Hello-NativeAOTFromJNI.csproj with a target that resolves the
macOS SDK dynamically via `xcrun --show-sdk-path`, so it keeps
working on newer SDKs and on machines with full Xcode installed.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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🤖 Code Review — Remove Java.Runtime.Environment, keep Java.Interop tests running
Verdict: ✅ Looks good — minor suggestions only (posting as a COMMENT, not an approval).
This is a careful, well-scoped refactor. I read the full tests/TestJVM/TestJVM.cs and diffed the new value/reference managers against the deleted Java.Runtime.Environment originals — the port is faithful. Things I independently verified:
  • ✅ The new CreateJVM / NativeLibraryJvmLibraryHandler JVM-bootstrap path is correct: the JNI_CreateJavaVM function-pointer signature (out IntPtr, out IntPtr, ref JavaVMInitArgs) maps to JavaVM** / void** / void*; marshaled option strings are freed in finally; and the library handle is disposed on every failure path (no double-dispose, LibraryHandler nulled on error).
  • ✅ JavaVMInitArgs.version is a 4-byte int-backed JniVersion enum, matching jint; struct field order matches the JNI layout.
  • ✅ JDK_OnlySupportsOneVM expects NotSupportedException, which CreateJVM throws on r != 0; the InvocationPointer-only path correctly short-circuits before creating a second VM.
  • ✅ Swapping Type.GetType ("..., Java.Runtime.Environment", throwOnError) for JniRuntimeJniValueManagerContract<ManagedValueManager> removes a reflection/trimming hazard — a nice trimmer/AOT win, and it justifies making ManagedValueManager public.
  • ✅ App.cs's sayHello uses JniTransition with proper try/catch/finally; JavaInteropRuntime.init intentionally avoids JniTransition (the runtime isn't initialized yet) and logs instead — both correct.
  • ✅ Remaining product-code edits (obsolete message text, InternalsVisibleTo removal, generator/JniPeerMembers comment cleanup, CMake/targets/Makefile/sln updates) are pure cleanup of references to the deleted assembly.
Issue counts: 0 ❌ · 0 ⚠️ · 2 💡 (both inline, non-blocking)
⚠️ CI not yet green: at review time only license/cla has completed — the dotnet.java-interop Azure build is still queued, so I can't independently confirm the build/tests pass. The PR description reports 669 passed, 0 failed, 4 skipped locally; please make sure the Azure build goes green before merging.
Note on scope: this PR intentionally removes Java.Base / Java.Runtime.Environment, the samples, and the performance/dynamic test suites, so that coverage goes away by design — the retained Java.Interop-Tests still exercise the core runtime through the rehosted TestJVM.
Thanks for the detailed description and the explicit "kept vs. removed" breakdown — it made reviewing 39k deleted lines tractable. Two small 💡 suggestions inline; nothing blocking.
Generated by Java.Interop PR Reviewer for issue #1447 · 1.7K AIC · ⌖ 49.6 AIC · ⊞ 34.6K
Comment /review to run again
Comment threadtests/TestJVM/TestJVM.cs
Comment threadtests/TestJVM/TestJVM.cs
jonathanpeppersand others
added 2 commits
June 26, 2026 08:12
@jonathanpeppers
Fix invalid -- in XML comment in Hello-NativeAOTFromJNI.csproj
aed3c97
XML comments cannot contain --, which broke MSBuild parsing of the
csproj on CI. Reword the comment to drop the literal --show-sdk-path`nflag reference so the project loads again.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppers
Sync Hello-NativeAOTFromJNI ValueManager DAM attributes with base
54ef878
PR #1481 (merged into main after this PR opened) removed some
[DynamicallyAccessedMembers] attributes from the base
JniRuntime.JniValueManager abstract methods. After merging main,
the sample's overrides still had the old DAM attributes, producing
IL2092/IL2095 'overridden members must have the same
DynamicallyAccessedMembersAttribute usage' errors when publishing
for NativeAOT.
Drop DAM from the sample overrides to match the new base signatures:
- ActivatePeer (Type type, ...)
- GetValueMarshalerCore<T> ()
- CreateLocalObjectReferenceArgumentCore (Type type, ...)
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppers
jonathanpeppers
merged commit 4e14244
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mainJun 26, 2026

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deleted the

remove-java-runtime-environment

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June 26, 2026 15:19
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Jun 30, 2026
@jonathanpeppers
Remove Java.Runtime.Environment project from solution
871a945
The Java.Runtime.Environment project was removed upstream in dotnet/java-interop#1447 (commit 4e142449), so the reference in Xamarin.Android.sln no longer resolves and breaks restore.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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@dependabot@jonathanpeppers
Bump todotnet/java-interop@6ec1345(#11782)
ad3f04b
### Bump external/Java.Interop from `8d54473` to `6ec1345`
Bumps [external/Java.Interop](https://github.com/dotnet/java-interop) from `8d54473` to `6ec1345`.
- [Commits](dotnet/java-interop@8d54473...6ec1345)
---
updated-dependencies:
- dependency-name: external/Java.Interop
dependency-version: 6ec1345165fa7385c935f16ccaa8cc38be50a080
dependency-type: direct:production
...
### Remove Java.Runtime.Environment project from solution
The Java.Runtime.Environment project was removed upstream in dotnet/java-interop#1447 (commit 4e142449), so the reference in Xamarin.Android.sln no longer resolves and breaks restore.
### Suppress new IL3050 warnings in ManagedTypeManager
Upstream dotnet/java-interop#1474 added [RequiresDynamicCode] to:
- JniRuntime.ReflectionJniTypeManager (the class), surfacing IL3050 at ManagedTypeManager..ctor() since we derive from it.
- JniEnvironment.Types.RegisterNatives(.., JniNativeMethodRegistration[], int), surfacing IL3050 at ManagedTypeManager.RegisterNativeMembers.
Suppress for now; the JniNativeMethodRegistration[] registration path will be migrated to the blittable RegisterNatives(JniObjectReference, ReadOnlySpan<JniNativeMethod>) overload in a future change.
Co-authored-by: Jonathan Peppers <jonathan.peppers@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppersjonathanpeppers
mentioned this pull request
Jul 6, 2026
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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Remove Java.Runtime.Environment and keep Java.Interop tests running - #1447
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jonathanpeppers merged 34 commits into
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remove-java-runtime-environment
Jun 26, 2026
Merged
Remove Java.Runtime.Environment and keep Java.Interop tests running#1447
jonathanpeppers merged 34 commits into
mainfrom 
remove-java-runtime-environment
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@simonrozsival
@simonrozsivalsimonrozsival
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Jun 8, 2026•

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Related to dotnet/android#11843
Summary
  • Remove the standalone src/Java.Runtime.Environment project and the desktop/JRE runtime path it provided.
  • Remove the samples, performance tests, dynamic tests, and Java.Base tests that depended on the old standalone runtime surface.
  • Keep Java.Interop-Tests in the solution and CI, and restore them to a passing state without bringing back the Java.Runtime.Environment assembly.
  • Remove the Java.Runtime.Environment friend-assembly dependency from Java.Interop; keep only the Java.Interop-Tests friend access needed by the restored tests.
  • Trim src/java-interop down to the native source subset still consumed by dotnet/android, while keeping a minimal validation project so those sources continue to compile in this repo.
  • Keep a minimal Hello-NativeAOTFromJNI smoke sample that proves Java can load a NativeAOT library, initialize JniRuntime from an existing JNIEnv*, and call into a native C# method.
Note on tests/TestJVM/TestJVM.cs
This file intentionally grew because it now owns the small amount of JVM-hosting/runtime plumbing that Java.Interop-Tests still need after deleting Java.Runtime.Environment.
The new code is test-only and replaces the old TestJVM : JreRuntime dependency with a direct TestJVM : JniRuntime host. It keeps only the pieces needed by the core tests:
  • JNI_CreateJavaVM loading through NativeLibrary
  • classpath setup for java-interop.jar and interop-test.jar
  • JDK/JVM path discovery from JdkInfo.props or installed JDKs
  • a minimal object reference manager for global/weak-global reference counts
  • a minimal managed value manager for peer registration/lookup/finalization
  • a test type manager for the explicit Java type mappings used by the suite
It deliberately does not reintroduce the old product/runtime API surface such as JreRuntime, JreRuntimeOptions, Mono runtime managers, standalone runtime packaging, reference-log plumbing, or the native java-interop JVM loader path. The restored tests/test host have no remaining Java.Runtime.Environment references.
Note on samples/Hello-NativeAOTFromJNI
The old sample depended on Java.Runtime.Environment, so this PR restores it as a smaller smoke test instead of bringing back the old sample wholesale.
The new sample:
  • publishes a NativeAOT shared library,
  • lets Java load it with System.loadLibrary("Hello-NativeAOTFromJNI"),
  • initializes a sample-local JniRuntime from the existing JNIEnv*, and
  • calls a native C# sayHello() method that returns a Java string.
It does not exercise managed peer construction or generated JCWs; those can be added later with explicit support if we want a broader NativeAOT/JNI sample.
Validation
  • dotnet build -t:Prepare
  • dotnet build src/java-interop/java-interop.csproj
  • dotnet build src/Java.Interop/Java.Interop.csproj --no-restore
  • dotnet build tests/Java.Interop-Tests/Java.Interop-Tests.csproj --no-restore
  • dotnet test tests/Java.Interop-Tests/Java.Interop-Tests.csproj --no-build — 669 passed, 0 failed, 4 skipped
  • dotnet publish -c Release -r osx-arm64 samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj
  • dotnet build -c Release -r osx-arm64 -t:RunJavaSample samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj --no-restore
CopilotAI
review requested due to automatic review settings
June 8, 2026 10:23
@simonrozsival
Remove Java.Runtime.Environment runtime path
97ce2d3
Remove the standalone JRE runtime project and its sample/test consumers from the Java.Interop submodule. This keeps the core Java.Interop build path while dropping the desktop/JRE-oriented runtime pieces that are not needed by the main Android SDK.
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Pull request overview
This PR removes the standalone Java.Runtime.Environment project and its desktop/JRE-oriented test & sample consumers, and updates build/docs metadata to reflect the cleanup and discourage desktop-specific runtime helper usage at the Java.Interop layer.
Changes:
  • Removed src/Java.Runtime.Environment and all dependent test/sample projects that were built around a standalone desktop/JRE runtime.
  • Removed JVM-based test suites and performance/overhead benchmarks that depended on the removed runtime path.
  • Updated JniRuntime.GetAvailableInvocationPointers() obsolete guidance, the repo Makefile, and .github/copilot-instructions.md to align with the new shape.
Show a summary per file
FileDescription
tests/TestJVM/TestJVM.csprojRemoved TestJVM helper project (desktop/JRE runtime dependency).
tests/TestJVM/TestJVM.csRemoved TestJVM helper runtime implementation.
tests/Java.Interop.Dynamic-Tests/Java.Interop/JavaVMFixture.csRemoved Dynamic test fixture relying on TestJVM/JRE runtime.
tests/Java.Interop.Dynamic-Tests/Java.Interop/DynamicJavaInstanceTests.csRemoved Dynamic JVM-based test coverage.
tests/Java.Interop.Dynamic-Tests/Java.Interop/DynamicJavaClassTests.csRemoved Dynamic JVM-based test coverage.
tests/Java.Interop.Dynamic-Tests/Java.Interop.Dynamic-Tests.csprojRemoved Dynamic test project and its JRE runtime references.
tests/Java.Interop-Tests/java/net/dot/jni/test/TestType.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/SelfRegistration.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassDerived.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassBase2.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassBase1.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RegisterNativesTestType.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/ObjectHelper.javaRemoved Java-side helper used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/MyJavaInterfaceImpl.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/JavaInterface.javaRemoved Java-side interface used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/GetThis.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/DesugarAndroidInterface$_CC.javaRemoved Java-side desugar test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CrossReferenceBridge.javaRemoved Java-side GC bridge/cross-ref test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallVirtualFromConstructorDerived.javaRemoved Java-side constructor-virtual-call test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallVirtualFromConstructorBase.javaRemoved Java-side constructor-virtual-call test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualDerived2.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualDerived.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualBase.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/AnotherJavaInterfaceImpl.javaRemoved Java-side interface impl used by tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/AndroidInterface.javaRemoved Java-side interface used for desugar-related tests.
tests/Java.Interop-Tests/Java.Interop/TestTypeTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/SelfRegistrationTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/SelfRegistration.csRemoved managed type used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/MethodBindingTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniValueMarshalerAttributeTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTypeSignatureTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTypeSignatureAttributeTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTransitionTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntimeTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntime.JniValueManagerTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntime.JniTypeManagerTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniReferenceSafeHandleTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniMarshalTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniInstanceMethodIDTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniEnvironmentTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JavaVMFixture.Partial.csRemoved JVM fixture scaffolding.
tests/Java.Interop-Tests/Java.Interop/JavaVMFixture.csRemoved JVM fixture setup & type-manager mapping logic.
tests/Java.Interop-Tests/Java.Interop/JavaSingleArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaSByteArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaPrimitiveArrayContract.csRemoved JVM-based contract test base class.
tests/Java.Interop-Tests/Java.Interop/JavaPeerableExtensionsTests.csRemoved JVM-based extension tests and related managed bindings.
tests/Java.Interop-Tests/Java.Interop/JavaObjectExtensionsTests.csRemoved JVM-based extension tests.
tests/Java.Interop-Tests/Java.Interop/JavaObjectArrayTest.csRemoved JVM-based object array contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaManagedGCBridgeTests.csRemoved JVM-based GC bridge tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt64ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt32ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt16ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaExceptionTests.csRemoved JVM-based exception interop tests.
tests/Java.Interop-Tests/Java.Interop/JavaDoubleArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaCharArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaBooleanArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaArrayContract.csRemoved JVM-based contract test base class.
tests/Java.Interop-Tests/Java.Interop/InvokeVirtualFromConstructorTests.csRemoved JVM-based constructor dispatch tests.
tests/Java.Interop-Tests/Java.Interop/GetThis.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/FinalizerHelpers.csRemoved helper used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallVirtualFromConstructorDerived.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallVirtualFromConstructorBase.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualDerived2.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualDerived.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualBase.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop-Tests.targetsRemoved MSBuild logic for building interop-test.jar and JCWs.
tests/Java.Interop-Tests/Java.Interop-Tests.csprojRemoved JVM-based Java.Interop test project.
tests/Java.Interop-Tests/Cadenza/BaseRocksFixture.csRemoved Cadenza test fixture that depended on JavaVMFixture.
tests/Java.Interop-Tests/Cadenza.Collections/ListContract.csRemoved Cadenza collection contract tests.
tests/Java.Interop-Tests/Cadenza.Collections/EnumerableContract.csRemoved Cadenza enumerable contract tests.
tests/Java.Interop-PerformanceTests/java/com/xamarin/interop/performance/JavaTiming.javaRemoved Java-side performance benchmark fixture.
tests/Java.Interop-PerformanceTests/Java.Interop/JavaVMFixture.csRemoved perf test fixture relying on TestJVM.
tests/Java.Interop-PerformanceTests/Java.Interop/JavaPrimitiveArraysTiming.csRemoved perf tests and benchmark helpers.
tests/Java.Interop-PerformanceTests/Java.Interop-PerformanceTests.targetsRemoved perf test JAR build target.
tests/Java.Interop-PerformanceTests/Java.Interop-PerformanceTests.csprojRemoved performance test project.
tests/Java.Base-Tests/java/net/dot/jni/test/PublicInterface.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/net/dot/jni/test/InterfaceMethodInheritance.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/net/dot/jni/test/HasInterfaceMethodInheritance.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/com/microsoft/java_base_tests/Invoker.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/Java.Base/NestedTypeTests.csRemoved Java.Base JVM-based tests.
tests/Java.Base-Tests/Java.Base/JniRuntimeJniValueManagerContractExtras.csRemoved Java.Base JVM-based tests.
tests/Java.Base-Tests/Java.Base/JavaVMFixture.Partial.csRemoved Java.Base test fixture scaffolding.
tests/Java.Base-Tests/Java.Base/JavaVMFixture.csRemoved Java.Base fixture setup using TestJVM.
tests/Java.Base-Tests/Java.Base/JavaToManagedTests.csRemoved Java→managed callback tests.
tests/Java.Base-Tests/Java.Base/InterfaceMethodInheritanceTests.csRemoved interface inheritance tests.
tests/Java.Base-Tests/Java.Base-Tests.targetsRemoved Java.Base test targets.
tests/Java.Base-Tests/Java.Base-Tests.csprojRemoved Java.Base test project.
tests/invocation-overhead/README.mdRemoved standalone invocation-overhead benchmark documentation.
tests/invocation-overhead/MakefileRemoved invocation-overhead build helpers.
tests/invocation-overhead/invocation-overhead.targetsRemoved invocation-overhead MSBuild targets.
tests/invocation-overhead/invocation-overhead.csprojRemoved invocation-overhead benchmark project.
src/Java.Runtime.Environment/Properties/AssemblyInfo.csRemoved standalone runtime assembly configuration.
src/Java.Runtime.Environment/Java.Runtime.Environment.targetsRemoved standalone runtime MSBuild logic.
src/Java.Runtime.Environment/Java.Runtime.Environment.dll.config.inRemoved template for dllmap config generation.
src/Java.Runtime.Environment/Java.Runtime.Environment.csprojRemoved standalone runtime project.
src/Java.Runtime.Environment/Java.Interop/JreTypeManager.csRemoved JRE-specific type manager implementation.
src/Java.Runtime.Environment/.gitignoreRemoved ignore entry for generated runtime config.
src/Java.Interop/Properties/AssemblyInfo.csRemoved InternalsVisibleTo entries for deleted assemblies/tests.
src/Java.Interop/Java.Interop/JniRuntime.csUpdated obsolete guidance to avoid referencing removed desktop runtime helpers.
samples/Hello-NativeAOTFromJNI/README.mdRemoved desktop/JRE-oriented sample docs.
samples/Hello-NativeAOTFromJNI/NativeAotTypeManager.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/ManagedType.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/JavaInteropRuntime.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/JavaCallableAttributes.csRemoved sample-only callable attribute definitions.
samples/Hello-NativeAOTFromJNI/java/net/dot/jni/hello/JavaInteropRuntime.javaRemoved Java launcher/runtime sample code.
samples/Hello-NativeAOTFromJNI/java/net/dot/jni/hello/App.javaRemoved Java launcher sample code.
samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targetsRemoved sample build targets (JCW + jar).
samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csprojRemoved NativeAOT-from-JNI sample project.
samples/Hello-NativeAOTFromJNI/App.csRemoved sample native entrypoint code.
samples/Hello-NativeAOTFromAndroid/Transforms/Metadata.xmlRemoved Android NativeAOT sample transform metadata.
samples/Hello-NativeAOTFromAndroid/settings.gradleRemoved Android NativeAOT Gradle settings.
samples/Hello-NativeAOTFromAndroid/NativeAotTypeManager.csRemoved Android NativeAOT sample type manager.
samples/Hello-NativeAOTFromAndroid/MainActivity.csRemoved Android NativeAOT managed activity sample.
samples/Hello-NativeAOTFromAndroid/LogcatTextWriter.csRemoved Android NativeAOT logging helper.
samples/Hello-NativeAOTFromAndroid/JavaInteropRuntime.csRemoved Android NativeAOT runtime init code.
samples/Hello-NativeAOTFromAndroid/Hello-NativeAOTFromAndroid.csprojRemoved Android NativeAOT sample project.
samples/Hello-NativeAOTFromAndroid/gradle.propertiesRemoved Android NativeAOT sample config.
samples/Hello-NativeAOTFromAndroid/build.gradleRemoved Android NativeAOT sample build script.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/values/strings.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/layout/activity_main.xmlRemoved Android sample layout.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/drawable/ic_launcher_background.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/drawable-v24/ic_launcher_foreground.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/NativeAotRuntimeProvider.javaRemoved Android sample Java bootstrapping.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/JavaMainActivity.javaRemoved Android sample Java activity.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/JavaInteropRuntime.javaRemoved Android sample Java runtime loader.
samples/Hello-NativeAOTFromAndroid/app/src/main/AndroidManifest.xmlRemoved Android sample manifest.
samples/Hello-NativeAOTFromAndroid/app/proguard-rules.proRemoved Android sample ProGuard rules.
samples/Hello-NativeAOTFromAndroid/app/build.gradleRemoved Android sample module build script.
samples/Hello-NativeAOTFromAndroid/app/.gitignoreRemoved Android sample ignores.
samples/Hello-NativeAOTFromAndroid/android.xmlRemoved Android sample API XML input.
samples/Hello-NativeAOTFromAndroid/.gitignoreRemoved Android sample ignores.
samples/Hello-Java.Base/Program.csRemoved desktop/JRE-oriented sample program.
samples/Hello-Java.Base/Hello-Java.Base.csprojRemoved desktop/JRE-oriented sample project.
samples/Hello-Core/README.mdRemoved desktop/JRE-oriented sample docs.
samples/Hello-Core/Program.csRemoved desktop/JRE-oriented sample program.
samples/Hello-Core/Hello-Core.csprojRemoved desktop/JRE-oriented sample project.
MakefileUpdated build metadata, but currently still references removed test outputs (needs further adjustment).
.github/copilot-instructions.mdUpdated repository guidance to reflect removed runtime/tests and updated validation commands.
Copilot's findings
  • Files reviewed: 162/178 changed files
  • Comments generated: 1
Comment threadMakefile
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@simonrozsival
simonrozsivalforce-pushed
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@simonrozsival
Fix Makefile test targets after JRE cleanup
a18c60f
Update the Makefile test lists to match the remaining managed test projects and stop building removed desktop/JRE test outputs.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@simonrozsival
simonrozsival
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Jun 8, 2026

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@copilot there seem to be many failing tests, so the PR is still not in good shape:
...
Failed GeneratedOK [48 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.StaticMethods.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/StaticMethods.cs:line 12
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
Failed GeneratedOK [44 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.StaticProperties.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/StaticProperties.cs:line 12
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
Failed GeneratedOK [61 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.Streams.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Streams.cs:line 12

CopilotAIand others
added 2 commits
June 8, 2026 12:09
@simonrozsival
Plan investigation for failing generator tests
ff097ff
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Fix generator-Tests Java.Interop dependency
6fb38a7
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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Jun 8, 2026

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@copilot there seem to be many failing tests, so the PR is still not in good shape:
...

...
Fixed in 6fb38a7. I added an explicit ProjectReference to src/Java.Interop/Java.Interop.csproj in tests/generator-Tests/generator-Tests.csproj, so Java.Interop.dll is now copied into bin/Test*-net10.0 for the integration compiler references. I also restored src/Java.Base-ref.cs to the pre-plan state to remove the accidental unrelated delta.
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@copilot CI is failing, try to fix it:
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
/Users/runner/hostedtoolcache/dotnet/dotnet test --logger trx;LogFileName=Java.Interop.Dynamic-Tests.trx --results-directory /Users/runner/work/_temp bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll" provided was not found.
##[error]Error: The process '/Users/runner/hostedtoolcache/dotnet/dotnet' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
##[warning]RetryHelper encountered task failure, will retry (attempt #: 1 out of 1) after 1000 ms
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
/Users/runner/hostedtoolcache/dotnet/dotnet test --logger trx;LogFileName=Java.Interop.Dynamic-Tests.trx --results-directory /Users/runner/work/_temp bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll" provided was not found.
##[error]Error: The process '/Users/runner/hostedtoolcache/dotnet/dotnet' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
Finishing: Tests: Java.Interop.Dynamic (.NET - MacOS)

or
The test source file "D:\a\1\s\bin/TestRelease-net10.0/Java.Interop-Tests.dll" provided was not found.
##[error]Error: The process 'C:\hostedtoolcache\windows\dotnet\dotnet.exe' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
##[warning]RetryHelper encountered task failure, will retry (attempt #: 1 out of 1) after 1000 ms
C:\Windows\system32\chcp.com 65001
Active code page: 65001
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
C:\hostedtoolcache\windows\dotnet\dotnet.exe test --logger trx;LogFileName=Java.Interop-Tests.trx --results-directory D:\a\_temp bin/TestRelease-net10.0/Java.Interop-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "D:\a\1\s\bin/TestRelease-net10.0/Java.Interop-Tests.dll" provided was not found.
##[error]Error: The process 'C:\hostedtoolcache\windows\dotnet\dotnet.exe' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
Finishing: Tests: Java.Interop (net10.0 - .NET - Windows)

CopilotAIand others
added 2 commits
June 8, 2026 13:39
@simonrozsival
Plan CI failure investigation
be4124f
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Remove deleted test assemblies from core CI template
c39003a
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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Jun 8, 2026

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@copilot CI is failing, try to fix it:
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted...

Fixed in c39003a. I removed the stale run-dotnet-test entries for deleted assemblies (Java.Interop-Tests, Java.Interop.Dynamic-Tests, Java.Interop-PerformanceTests, and Java.Base-Tests) from build-tools/automation/templates/core-tests.yaml, so CI no longer tries to run missing DLLs from bin/TestRelease-net10.0.
@simonrozsival
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Jun 8, 2026

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@copilot explain why we needed to remove these tests. Does it mean that without the full Java.Runtime.Environment, we can't run Java.Interop tests outside of dotnet/android?
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Jun 8, 2026

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@copilot explain why we needed to remove these tests. Does it mean that without the full Java.Runtime.Environment, we can't run Java.Interop tests outside of dotnet/android?
Those tests were removed because they depended on the standalone Java.Runtime.Environment host that this PR deletes. Once that runtime path was removed, those assemblies were no longer produced, so keeping their CI entries only caused false red failures.
It does not mean Java.Interop as a whole can only be used with dotnet/android. It means this repo no longer carries the old desktop/JRE-specific runtime host+test harness. The removed test projects specifically exercised that host. To run equivalent runtime tests outside dotnet/android again, we’d need to add and maintain a new supported non-Android host path.
jonathanpeppers
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Jun 8, 2026
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Comment threadexternal/xamarin-android-tools
@jonathanpeppers
Revert unintended xamarin-android-tools submodule change
630522e
Co-authored-by: jonathanpeppers <840039+jonathanpeppers@users.noreply.github.com>
CopilotAI
requested a review
from jonathanpeppersJune 8, 2026 16:37
@simonrozsival
Restore Java.Interop tests without JRE runtime
4e2297d
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@simonrozsivalsimonrozsival
changed the title
Remove standalone Java.Runtime.Environment runtime pathRemove Java.Runtime.Environment and keep Java.Interop tests runningJun 9, 2026
CopilotAIand others
added 2 commits
June 22, 2026 08:10
@simonrozsival
Merge remote-tracking branch 'origin/main' into remove-java-runtime-e…
a003dcd
…nvironment
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Implement new abstract JniValueManager members in Hello-NativeAOTFrom…
ed27671
…JNI sample
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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Jun 22, 2026

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@copilot update the branch with latest changes from main and fix these build errors:
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoLogo -NoProfile -NonInteractive -ExecutionPoli...

Updated the branch with latest origin/main (clean merge) and fixed the build errors in 81dc (latest commit).
The trimmable-type-map work made several JniRuntime.JniValueManager members abstract (CreatePeer, CreateValueCore, GetValueCore, GetValueMarshalerCore, CreateLocalObjectReferenceArgumentCore, ActivatePeer, ConstructPeerCore). Since this smoke sample never constructs managed peers (it only returns a Java string via raw JNI), I implemented those members in the sample's ValueManager as AOT-safe NotSupportedException stubs rather than reintroducing the reflection-based manager.
Validated:
  • dotnet build samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj -c Release — 0 warnings
  • dotnet publish -r linux-x64 — NativeAOT codegen completes with no IL trim/AOT warnings
  • dotnet test tests/Java.Interop-Tests — 671 passed, 0 failed, 4 skipped
@simonrozsival
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Jun 22, 2026

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@copilot fix failing build:
/usr/local/bin/pwsh -NoLogo -NoProfile -NonInteractive -Command . '/Users/runner/work/_temp/c200f9fa-3322-4cf3-8650-5b7159d65d36.ps1'
Determining projects to restore...
Restored /Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj (in 311 ms).
2 of 3 projects are up-to-date for restore.
Hello from Java!
JavaInteropRuntime.init : error : System.NotSupportedException: Please set CreationOptions.TypeManager! [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
at Java.Interop.JniRuntime..ctor(JniRuntime.CreationOptions) + 0x51e
at libHello-NativeAOTFromJNI!<BaseAddress>+0x78a8c
Unhandled exception. System.NotSupportedException: No available Java runtime to attach to. Please create one.
at Java.Interop.JniRuntime.get_CurrentRuntime() + 0x173
at Java.Interop.JniEnvironmentInfo..ctor() + 0x10
at Java.Interop.JniEnvironment.<>c.<.cctor>b__38_0() + 0x18
at System.Threading.ThreadLocal`1.GetValueSlow() + 0x25
at libHello-NativeAOTFromJNI!<BaseAddress>+0x786d1
/var/folders/d_/7cp7f2xj0m5gcp7ch5j2t7tc0000gn/T/MSBuildTemp/tmpdac8ca75ed214639b541fa75d6ccaa52.exec.cmd: line 2: 9273 Abort trap: 6 "/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App
/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targets(49,5): error MSB3073: The command ""/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App" exited with code 134. [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
Build FAILED.
JavaInteropRuntime.init : error : System.NotSupportedException: Please set CreationOptions.TypeManager! [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targets(49,5): error MSB3073: The command ""/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App" exited with code 134. [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
0 Warning(s)
2 Error(s)
Time Elapsed 00:00:01.68

@simonrozsival
Set CreationOptions.TypeManager in Hello-NativeAOTFromJNI sample runtime
d70097e
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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Jun 22, 2026

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@copilot fix failing build:
/usr/local/bin/pwsh -NoLogo -NoProfile -NonInteractive -Command . '/Users/runner/work/_temp/c200f9fa-3322-4cf3-8650-5b7159d65d36.ps1'

...
Fixed in the latest commit. The sample's ExistingJniRuntime wasn't setting CreationOptions.TypeManager, so JniRuntime's constructor threw NotSupportedException: Please set CreationOptions.TypeManager!. I added TypeManager = new JniRuntime.JniTypeManager () to the CreationOptions (the base JniTypeManager is concrete and AOT-safe — its virtuals return empty, which is sufficient since this smoke sample only returns a Java string via raw JNI and never resolves managed types).
Validated end-to-end on linux-x64: NativeAOT publish + running net/dot/jni/hello/App now prints:
Hello from Java!
Hello from .NET NativeAOT!
String returned to Java: Hello from .NET NativeAOT!

The runtime initializes with no exception.
@simonrozsival
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Jun 23, 2026

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@copilot fix the following build error:
CSC : error CS1566: Error reading resource 'Xamarin.Android.Tools.BytecodeTests.kotlin-gradle.Widgets.class' -- 'Could not find a part of the path '/Users/runner/work/1/s/tests/Xamarin.Android.Tools.Bytecode-Tests/kotlin-gradle/classes/xat/bytecode/tests/Widgets.class'.' [/Users/runner/work/1/s/tests/Xamarin.Android.Tools.Bytecode-Tests/Xamarin.Android.Tools.Bytecode-Tests.csproj]
0 Warning(s)
1 Error(s)

@simonrozsival
Isolate Kotlin Gradle test outputs per project
697b961
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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Jun 23, 2026

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@copilot fix the following build error:
...
Fixed in 697b961. The Kotlin/Gradle fixture classes are now generated into each consuming test project's obj/ directory instead of a shared source-tree kotlin-gradle/classes directory, so parallel solution builds no longer race over the embedded Widgets.class resource.
Validated with dotnet build Java.Interop.sln -c Release from clean Kotlin outputs, plus Release builds/tests for Xamarin.Android.Tools.Bytecode-Tests and generator-Tests.
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🤖 Code Review — ✅ LGTM (with minor suggestions)
This is a clean, well-executed removal of the Java.Runtime.Environment project. The test-host runtime plumbing it provided (value/object-reference managers, JVM creation) is faithfully re-homed into tests/TestJVM/TestJVM.cs, the NativeAOT sample is made self-contained, and the native build is reworked to a static validation lib. CI is green (build + full Java.Interop test suite pass).
I diffed the ported ManagedValueManager / ManagedObjectReferenceManager against the deleted originals and verified:
  • gref/wgref counting is correct (incrementing on a valid result, decrementing on a valid input ref is the right asymmetry);
  • CreateJVM resource handling is sound — Dispose is idempotent, so the LoadJvmLibrary-throws path doesn't double-free;
  • the JavaVMInitArgs / JavaVMOption struct layouts (blittable, sequential) and the JNI_CreateJavaVMdelegate* unmanaged<...> signature match the JNI ABI.
I also confirmed there are no dangling references to the removed projects in the solution, Makefile, CI templates, or Sdk.targets, and that Hello-NativeAOTFromJNI (kept) is still exercised via the dedicated dotnet publish CI step rather than the solution.
Findings (non-blocking)
  • 💡 Documentation — tests/TestJVM/TestJVM.cs:478: the "why" comment about the Local-ref / SafeHandle.ReferenceType thread-locality invariant was dropped during the port.
  • 💡 MSBuild — samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj:41: hardcoded MacOSX15.sdk path will silently stop applying on future SDKs.
Nice touches
  • JniRuntimeJniValueManagerContract now binds the generic <ManagedValueManager> instead of Type.GetType("...Java.Runtime.Environment...") reflection — trimmer/AOT-friendly.
  • src/java-interop/CMakeLists.txt fixes a pre-existing foreach(dir in ${...}) syntax bug.
  • Makefilerun-net-tests gains the missing ; so every test assembly in the loop actually runs.
Verdict: ✅ LGTM — 0 ❌ · 0 ⚠️ · 2 💡. The two suggestions are optional and don't block merge.
Generated by Java.Interop PR Reviewer for issue #1447 · 2.5K AIC · ⌖ 46.9 AIC · ⊞ 34.6K
Comment /review to run again
Comment threadtests/TestJVM/TestJVM.cs
Comment threadsamples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj
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@jonathanpeppers
Merge origin/main and address review feedback
eea9765
- Resolve merge conflicts with main by keeping deletions of:
- samples/Hello-NativeAOTFromAndroid/NativeAotTypeManager.cs
- samples/Hello-NativeAOTFromJNI/NativeAotTypeManager.cs
- src/Java.Runtime.Environment/Java.Interop/JreTypeManager.cs
- Address review comments from PR 1447:
- Restore the "why" comment on ManagedValueManager.FinalizePeer
explaining why we use JniObjectReference.Type instead of
SafeHandle.ReferenceType (the latter is thread-local and returns
Invalid off-thread for Local refs).
- Replace the hard-coded MacOSX15.sdk -isysroot path in
Hello-NativeAOTFromJNI.csproj with a target that resolves the
macOS SDK dynamically via `xcrun --show-sdk-path`, so it keeps
working on newer SDKs and on machines with full Xcode installed.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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🤖 Code Review — Remove Java.Runtime.Environment, keep Java.Interop tests running
Verdict: ✅ Looks good — minor suggestions only (posting as a COMMENT, not an approval).
This is a careful, well-scoped refactor. I read the full tests/TestJVM/TestJVM.cs and diffed the new value/reference managers against the deleted Java.Runtime.Environment originals — the port is faithful. Things I independently verified:
  • ✅ The new CreateJVM / NativeLibraryJvmLibraryHandler JVM-bootstrap path is correct: the JNI_CreateJavaVM function-pointer signature (out IntPtr, out IntPtr, ref JavaVMInitArgs) maps to JavaVM** / void** / void*; marshaled option strings are freed in finally; and the library handle is disposed on every failure path (no double-dispose, LibraryHandler nulled on error).
  • ✅ JavaVMInitArgs.version is a 4-byte int-backed JniVersion enum, matching jint; struct field order matches the JNI layout.
  • ✅ JDK_OnlySupportsOneVM expects NotSupportedException, which CreateJVM throws on r != 0; the InvocationPointer-only path correctly short-circuits before creating a second VM.
  • ✅ Swapping Type.GetType ("..., Java.Runtime.Environment", throwOnError) for JniRuntimeJniValueManagerContract<ManagedValueManager> removes a reflection/trimming hazard — a nice trimmer/AOT win, and it justifies making ManagedValueManager public.
  • ✅ App.cs's sayHello uses JniTransition with proper try/catch/finally; JavaInteropRuntime.init intentionally avoids JniTransition (the runtime isn't initialized yet) and logs instead — both correct.
  • ✅ Remaining product-code edits (obsolete message text, InternalsVisibleTo removal, generator/JniPeerMembers comment cleanup, CMake/targets/Makefile/sln updates) are pure cleanup of references to the deleted assembly.
Issue counts: 0 ❌ · 0 ⚠️ · 2 💡 (both inline, non-blocking)
⚠️ CI not yet green: at review time only license/cla has completed — the dotnet.java-interop Azure build is still queued, so I can't independently confirm the build/tests pass. The PR description reports 669 passed, 0 failed, 4 skipped locally; please make sure the Azure build goes green before merging.
Note on scope: this PR intentionally removes Java.Base / Java.Runtime.Environment, the samples, and the performance/dynamic test suites, so that coverage goes away by design — the retained Java.Interop-Tests still exercise the core runtime through the rehosted TestJVM.
Thanks for the detailed description and the explicit "kept vs. removed" breakdown — it made reviewing 39k deleted lines tractable. Two small 💡 suggestions inline; nothing blocking.
Generated by Java.Interop PR Reviewer for issue #1447 · 1.7K AIC · ⌖ 49.6 AIC · ⊞ 34.6K
Comment /review to run again
Comment threadtests/TestJVM/TestJVM.cs
Comment threadtests/TestJVM/TestJVM.cs
jonathanpeppersand others
added 2 commits
June 26, 2026 08:12
@jonathanpeppers
Fix invalid -- in XML comment in Hello-NativeAOTFromJNI.csproj
aed3c97
XML comments cannot contain --, which broke MSBuild parsing of the
csproj on CI. Reword the comment to drop the literal --show-sdk-path`nflag reference so the project loads again.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppers
Sync Hello-NativeAOTFromJNI ValueManager DAM attributes with base
54ef878
PR #1481 (merged into main after this PR opened) removed some
[DynamicallyAccessedMembers] attributes from the base
JniRuntime.JniValueManager abstract methods. After merging main,
the sample's overrides still had the old DAM attributes, producing
IL2092/IL2095 'overridden members must have the same
DynamicallyAccessedMembersAttribute usage' errors when publishing
for NativeAOT.
Drop DAM from the sample overrides to match the new base signatures:
- ActivatePeer (Type type, ...)
- GetValueMarshalerCore<T> ()
- CreateLocalObjectReferenceArgumentCore (Type type, ...)
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppers
jonathanpeppers
merged commit 4e14244
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June 26, 2026 15:19
jonathanpeppers added a commit
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Jun 30, 2026
@jonathanpeppers
Remove Java.Runtime.Environment project from solution
871a945
The Java.Runtime.Environment project was removed upstream in dotnet/java-interop#1447 (commit 4e142449), so the reference in Xamarin.Android.sln no longer resolves and breaks restore.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
jonathanpeppers added a commit
to dotnet/android
that referenced
this pull request
Jul 1, 2026
@dependabot@jonathanpeppers
Bump todotnet/java-interop@6ec1345(#11782)
ad3f04b
### Bump external/Java.Interop from `8d54473` to `6ec1345`
Bumps [external/Java.Interop](https://github.com/dotnet/java-interop) from `8d54473` to `6ec1345`.
- [Commits](dotnet/java-interop@8d54473...6ec1345)
---
updated-dependencies:
- dependency-name: external/Java.Interop
dependency-version: 6ec1345165fa7385c935f16ccaa8cc38be50a080
dependency-type: direct:production
...
### Remove Java.Runtime.Environment project from solution
The Java.Runtime.Environment project was removed upstream in dotnet/java-interop#1447 (commit 4e142449), so the reference in Xamarin.Android.sln no longer resolves and breaks restore.
### Suppress new IL3050 warnings in ManagedTypeManager
Upstream dotnet/java-interop#1474 added [RequiresDynamicCode] to:
- JniRuntime.ReflectionJniTypeManager (the class), surfacing IL3050 at ManagedTypeManager..ctor() since we derive from it.
- JniEnvironment.Types.RegisterNatives(.., JniNativeMethodRegistration[], int), surfacing IL3050 at ManagedTypeManager.RegisterNativeMembers.
Suppress for now; the JniNativeMethodRegistration[] registration path will be migrated to the blittable RegisterNatives(JniObjectReference, ReadOnlySpan<JniNativeMethod>) overload in a future change.
Co-authored-by: Jonathan Peppers <jonathan.peppers@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppersjonathanpeppers
mentioned this pull request
Jul 6, 2026
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@simonrozsival@jonathanpeppers

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if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
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Remove Java.Runtime.Environment and keep Java.Interop tests running - #1447
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remove-java-runtime-environment
Jun 26, 2026
Merged
Remove Java.Runtime.Environment and keep Java.Interop tests running#1447
jonathanpeppers merged 34 commits into
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@simonrozsival
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Related to dotnet/android#11843
Summary
  • Remove the standalone src/Java.Runtime.Environment project and the desktop/JRE runtime path it provided.
  • Remove the samples, performance tests, dynamic tests, and Java.Base tests that depended on the old standalone runtime surface.
  • Keep Java.Interop-Tests in the solution and CI, and restore them to a passing state without bringing back the Java.Runtime.Environment assembly.
  • Remove the Java.Runtime.Environment friend-assembly dependency from Java.Interop; keep only the Java.Interop-Tests friend access needed by the restored tests.
  • Trim src/java-interop down to the native source subset still consumed by dotnet/android, while keeping a minimal validation project so those sources continue to compile in this repo.
  • Keep a minimal Hello-NativeAOTFromJNI smoke sample that proves Java can load a NativeAOT library, initialize JniRuntime from an existing JNIEnv*, and call into a native C# method.
Note on tests/TestJVM/TestJVM.cs
This file intentionally grew because it now owns the small amount of JVM-hosting/runtime plumbing that Java.Interop-Tests still need after deleting Java.Runtime.Environment.
The new code is test-only and replaces the old TestJVM : JreRuntime dependency with a direct TestJVM : JniRuntime host. It keeps only the pieces needed by the core tests:
  • JNI_CreateJavaVM loading through NativeLibrary
  • classpath setup for java-interop.jar and interop-test.jar
  • JDK/JVM path discovery from JdkInfo.props or installed JDKs
  • a minimal object reference manager for global/weak-global reference counts
  • a minimal managed value manager for peer registration/lookup/finalization
  • a test type manager for the explicit Java type mappings used by the suite
It deliberately does not reintroduce the old product/runtime API surface such as JreRuntime, JreRuntimeOptions, Mono runtime managers, standalone runtime packaging, reference-log plumbing, or the native java-interop JVM loader path. The restored tests/test host have no remaining Java.Runtime.Environment references.
Note on samples/Hello-NativeAOTFromJNI
The old sample depended on Java.Runtime.Environment, so this PR restores it as a smaller smoke test instead of bringing back the old sample wholesale.
The new sample:
  • publishes a NativeAOT shared library,
  • lets Java load it with System.loadLibrary("Hello-NativeAOTFromJNI"),
  • initializes a sample-local JniRuntime from the existing JNIEnv*, and
  • calls a native C# sayHello() method that returns a Java string.
It does not exercise managed peer construction or generated JCWs; those can be added later with explicit support if we want a broader NativeAOT/JNI sample.
Validation
  • dotnet build -t:Prepare
  • dotnet build src/java-interop/java-interop.csproj
  • dotnet build src/Java.Interop/Java.Interop.csproj --no-restore
  • dotnet build tests/Java.Interop-Tests/Java.Interop-Tests.csproj --no-restore
  • dotnet test tests/Java.Interop-Tests/Java.Interop-Tests.csproj --no-build — 669 passed, 0 failed, 4 skipped
  • dotnet publish -c Release -r osx-arm64 samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj
  • dotnet build -c Release -r osx-arm64 -t:RunJavaSample samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj --no-restore
CopilotAI
review requested due to automatic review settings
June 8, 2026 10:23
@simonrozsival
Remove Java.Runtime.Environment runtime path
97ce2d3
Remove the standalone JRE runtime project and its sample/test consumers from the Java.Interop submodule. This keeps the core Java.Interop build path while dropping the desktop/JRE-oriented runtime pieces that are not needed by the main Android SDK.
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Pull request overview
This PR removes the standalone Java.Runtime.Environment project and its desktop/JRE-oriented test & sample consumers, and updates build/docs metadata to reflect the cleanup and discourage desktop-specific runtime helper usage at the Java.Interop layer.
Changes:
  • Removed src/Java.Runtime.Environment and all dependent test/sample projects that were built around a standalone desktop/JRE runtime.
  • Removed JVM-based test suites and performance/overhead benchmarks that depended on the removed runtime path.
  • Updated JniRuntime.GetAvailableInvocationPointers() obsolete guidance, the repo Makefile, and .github/copilot-instructions.md to align with the new shape.
Show a summary per file
FileDescription
tests/TestJVM/TestJVM.csprojRemoved TestJVM helper project (desktop/JRE runtime dependency).
tests/TestJVM/TestJVM.csRemoved TestJVM helper runtime implementation.
tests/Java.Interop.Dynamic-Tests/Java.Interop/JavaVMFixture.csRemoved Dynamic test fixture relying on TestJVM/JRE runtime.
tests/Java.Interop.Dynamic-Tests/Java.Interop/DynamicJavaInstanceTests.csRemoved Dynamic JVM-based test coverage.
tests/Java.Interop.Dynamic-Tests/Java.Interop/DynamicJavaClassTests.csRemoved Dynamic JVM-based test coverage.
tests/Java.Interop.Dynamic-Tests/Java.Interop.Dynamic-Tests.csprojRemoved Dynamic test project and its JRE runtime references.
tests/Java.Interop-Tests/java/net/dot/jni/test/TestType.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/SelfRegistration.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassDerived.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassBase2.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassBase1.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RegisterNativesTestType.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/ObjectHelper.javaRemoved Java-side helper used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/MyJavaInterfaceImpl.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/JavaInterface.javaRemoved Java-side interface used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/GetThis.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/DesugarAndroidInterface$_CC.javaRemoved Java-side desugar test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CrossReferenceBridge.javaRemoved Java-side GC bridge/cross-ref test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallVirtualFromConstructorDerived.javaRemoved Java-side constructor-virtual-call test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallVirtualFromConstructorBase.javaRemoved Java-side constructor-virtual-call test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualDerived2.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualDerived.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualBase.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/AnotherJavaInterfaceImpl.javaRemoved Java-side interface impl used by tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/AndroidInterface.javaRemoved Java-side interface used for desugar-related tests.
tests/Java.Interop-Tests/Java.Interop/TestTypeTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/SelfRegistrationTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/SelfRegistration.csRemoved managed type used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/MethodBindingTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniValueMarshalerAttributeTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTypeSignatureTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTypeSignatureAttributeTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTransitionTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntimeTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntime.JniValueManagerTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntime.JniTypeManagerTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniReferenceSafeHandleTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniMarshalTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniInstanceMethodIDTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniEnvironmentTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JavaVMFixture.Partial.csRemoved JVM fixture scaffolding.
tests/Java.Interop-Tests/Java.Interop/JavaVMFixture.csRemoved JVM fixture setup & type-manager mapping logic.
tests/Java.Interop-Tests/Java.Interop/JavaSingleArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaSByteArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaPrimitiveArrayContract.csRemoved JVM-based contract test base class.
tests/Java.Interop-Tests/Java.Interop/JavaPeerableExtensionsTests.csRemoved JVM-based extension tests and related managed bindings.
tests/Java.Interop-Tests/Java.Interop/JavaObjectExtensionsTests.csRemoved JVM-based extension tests.
tests/Java.Interop-Tests/Java.Interop/JavaObjectArrayTest.csRemoved JVM-based object array contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaManagedGCBridgeTests.csRemoved JVM-based GC bridge tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt64ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt32ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt16ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaExceptionTests.csRemoved JVM-based exception interop tests.
tests/Java.Interop-Tests/Java.Interop/JavaDoubleArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaCharArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaBooleanArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaArrayContract.csRemoved JVM-based contract test base class.
tests/Java.Interop-Tests/Java.Interop/InvokeVirtualFromConstructorTests.csRemoved JVM-based constructor dispatch tests.
tests/Java.Interop-Tests/Java.Interop/GetThis.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/FinalizerHelpers.csRemoved helper used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallVirtualFromConstructorDerived.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallVirtualFromConstructorBase.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualDerived2.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualDerived.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualBase.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop-Tests.targetsRemoved MSBuild logic for building interop-test.jar and JCWs.
tests/Java.Interop-Tests/Java.Interop-Tests.csprojRemoved JVM-based Java.Interop test project.
tests/Java.Interop-Tests/Cadenza/BaseRocksFixture.csRemoved Cadenza test fixture that depended on JavaVMFixture.
tests/Java.Interop-Tests/Cadenza.Collections/ListContract.csRemoved Cadenza collection contract tests.
tests/Java.Interop-Tests/Cadenza.Collections/EnumerableContract.csRemoved Cadenza enumerable contract tests.
tests/Java.Interop-PerformanceTests/java/com/xamarin/interop/performance/JavaTiming.javaRemoved Java-side performance benchmark fixture.
tests/Java.Interop-PerformanceTests/Java.Interop/JavaVMFixture.csRemoved perf test fixture relying on TestJVM.
tests/Java.Interop-PerformanceTests/Java.Interop/JavaPrimitiveArraysTiming.csRemoved perf tests and benchmark helpers.
tests/Java.Interop-PerformanceTests/Java.Interop-PerformanceTests.targetsRemoved perf test JAR build target.
tests/Java.Interop-PerformanceTests/Java.Interop-PerformanceTests.csprojRemoved performance test project.
tests/Java.Base-Tests/java/net/dot/jni/test/PublicInterface.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/net/dot/jni/test/InterfaceMethodInheritance.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/net/dot/jni/test/HasInterfaceMethodInheritance.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/com/microsoft/java_base_tests/Invoker.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/Java.Base/NestedTypeTests.csRemoved Java.Base JVM-based tests.
tests/Java.Base-Tests/Java.Base/JniRuntimeJniValueManagerContractExtras.csRemoved Java.Base JVM-based tests.
tests/Java.Base-Tests/Java.Base/JavaVMFixture.Partial.csRemoved Java.Base test fixture scaffolding.
tests/Java.Base-Tests/Java.Base/JavaVMFixture.csRemoved Java.Base fixture setup using TestJVM.
tests/Java.Base-Tests/Java.Base/JavaToManagedTests.csRemoved Java→managed callback tests.
tests/Java.Base-Tests/Java.Base/InterfaceMethodInheritanceTests.csRemoved interface inheritance tests.
tests/Java.Base-Tests/Java.Base-Tests.targetsRemoved Java.Base test targets.
tests/Java.Base-Tests/Java.Base-Tests.csprojRemoved Java.Base test project.
tests/invocation-overhead/README.mdRemoved standalone invocation-overhead benchmark documentation.
tests/invocation-overhead/MakefileRemoved invocation-overhead build helpers.
tests/invocation-overhead/invocation-overhead.targetsRemoved invocation-overhead MSBuild targets.
tests/invocation-overhead/invocation-overhead.csprojRemoved invocation-overhead benchmark project.
src/Java.Runtime.Environment/Properties/AssemblyInfo.csRemoved standalone runtime assembly configuration.
src/Java.Runtime.Environment/Java.Runtime.Environment.targetsRemoved standalone runtime MSBuild logic.
src/Java.Runtime.Environment/Java.Runtime.Environment.dll.config.inRemoved template for dllmap config generation.
src/Java.Runtime.Environment/Java.Runtime.Environment.csprojRemoved standalone runtime project.
src/Java.Runtime.Environment/Java.Interop/JreTypeManager.csRemoved JRE-specific type manager implementation.
src/Java.Runtime.Environment/.gitignoreRemoved ignore entry for generated runtime config.
src/Java.Interop/Properties/AssemblyInfo.csRemoved InternalsVisibleTo entries for deleted assemblies/tests.
src/Java.Interop/Java.Interop/JniRuntime.csUpdated obsolete guidance to avoid referencing removed desktop runtime helpers.
samples/Hello-NativeAOTFromJNI/README.mdRemoved desktop/JRE-oriented sample docs.
samples/Hello-NativeAOTFromJNI/NativeAotTypeManager.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/ManagedType.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/JavaInteropRuntime.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/JavaCallableAttributes.csRemoved sample-only callable attribute definitions.
samples/Hello-NativeAOTFromJNI/java/net/dot/jni/hello/JavaInteropRuntime.javaRemoved Java launcher/runtime sample code.
samples/Hello-NativeAOTFromJNI/java/net/dot/jni/hello/App.javaRemoved Java launcher sample code.
samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targetsRemoved sample build targets (JCW + jar).
samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csprojRemoved NativeAOT-from-JNI sample project.
samples/Hello-NativeAOTFromJNI/App.csRemoved sample native entrypoint code.
samples/Hello-NativeAOTFromAndroid/Transforms/Metadata.xmlRemoved Android NativeAOT sample transform metadata.
samples/Hello-NativeAOTFromAndroid/settings.gradleRemoved Android NativeAOT Gradle settings.
samples/Hello-NativeAOTFromAndroid/NativeAotTypeManager.csRemoved Android NativeAOT sample type manager.
samples/Hello-NativeAOTFromAndroid/MainActivity.csRemoved Android NativeAOT managed activity sample.
samples/Hello-NativeAOTFromAndroid/LogcatTextWriter.csRemoved Android NativeAOT logging helper.
samples/Hello-NativeAOTFromAndroid/JavaInteropRuntime.csRemoved Android NativeAOT runtime init code.
samples/Hello-NativeAOTFromAndroid/Hello-NativeAOTFromAndroid.csprojRemoved Android NativeAOT sample project.
samples/Hello-NativeAOTFromAndroid/gradle.propertiesRemoved Android NativeAOT sample config.
samples/Hello-NativeAOTFromAndroid/build.gradleRemoved Android NativeAOT sample build script.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/values/strings.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/layout/activity_main.xmlRemoved Android sample layout.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/drawable/ic_launcher_background.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/drawable-v24/ic_launcher_foreground.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/NativeAotRuntimeProvider.javaRemoved Android sample Java bootstrapping.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/JavaMainActivity.javaRemoved Android sample Java activity.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/JavaInteropRuntime.javaRemoved Android sample Java runtime loader.
samples/Hello-NativeAOTFromAndroid/app/src/main/AndroidManifest.xmlRemoved Android sample manifest.
samples/Hello-NativeAOTFromAndroid/app/proguard-rules.proRemoved Android sample ProGuard rules.
samples/Hello-NativeAOTFromAndroid/app/build.gradleRemoved Android sample module build script.
samples/Hello-NativeAOTFromAndroid/app/.gitignoreRemoved Android sample ignores.
samples/Hello-NativeAOTFromAndroid/android.xmlRemoved Android sample API XML input.
samples/Hello-NativeAOTFromAndroid/.gitignoreRemoved Android sample ignores.
samples/Hello-Java.Base/Program.csRemoved desktop/JRE-oriented sample program.
samples/Hello-Java.Base/Hello-Java.Base.csprojRemoved desktop/JRE-oriented sample project.
samples/Hello-Core/README.mdRemoved desktop/JRE-oriented sample docs.
samples/Hello-Core/Program.csRemoved desktop/JRE-oriented sample program.
samples/Hello-Core/Hello-Core.csprojRemoved desktop/JRE-oriented sample project.
MakefileUpdated build metadata, but currently still references removed test outputs (needs further adjustment).
.github/copilot-instructions.mdUpdated repository guidance to reflect removed runtime/tests and updated validation commands.
Copilot's findings
  • Files reviewed: 162/178 changed files
  • Comments generated: 1
Comment threadMakefile
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@simonrozsival
simonrozsivalforce-pushed
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58ec716CompareJune 8, 2026 10:33
@simonrozsival
Fix Makefile test targets after JRE cleanup
a18c60f
Update the Makefile test lists to match the remaining managed test projects and stop building removed desktop/JRE test outputs.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@simonrozsival
simonrozsival
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Jun 8, 2026

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@copilot there seem to be many failing tests, so the PR is still not in good shape:
...
Failed GeneratedOK [48 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.StaticMethods.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/StaticMethods.cs:line 12
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
Failed GeneratedOK [44 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.StaticProperties.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/StaticProperties.cs:line 12
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
Failed GeneratedOK [61 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.Streams.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Streams.cs:line 12

CopilotAIand others
added 2 commits
June 8, 2026 12:09
@simonrozsival
Plan investigation for failing generator tests
ff097ff
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Fix generator-Tests Java.Interop dependency
6fb38a7
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
CopilotAI
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Jun 8, 2026

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@copilot there seem to be many failing tests, so the PR is still not in good shape:
...

...
Fixed in 6fb38a7. I added an explicit ProjectReference to src/Java.Interop/Java.Interop.csproj in tests/generator-Tests/generator-Tests.csproj, so Java.Interop.dll is now copied into bin/Test*-net10.0 for the integration compiler references. I also restored src/Java.Base-ref.cs to the pre-plan state to remove the accidental unrelated delta.
@simonrozsival
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Jun 8, 2026

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@copilot CI is failing, try to fix it:
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
/Users/runner/hostedtoolcache/dotnet/dotnet test --logger trx;LogFileName=Java.Interop.Dynamic-Tests.trx --results-directory /Users/runner/work/_temp bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll" provided was not found.
##[error]Error: The process '/Users/runner/hostedtoolcache/dotnet/dotnet' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
##[warning]RetryHelper encountered task failure, will retry (attempt #: 1 out of 1) after 1000 ms
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
/Users/runner/hostedtoolcache/dotnet/dotnet test --logger trx;LogFileName=Java.Interop.Dynamic-Tests.trx --results-directory /Users/runner/work/_temp bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll" provided was not found.
##[error]Error: The process '/Users/runner/hostedtoolcache/dotnet/dotnet' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
Finishing: Tests: Java.Interop.Dynamic (.NET - MacOS)

or
The test source file "D:\a\1\s\bin/TestRelease-net10.0/Java.Interop-Tests.dll" provided was not found.
##[error]Error: The process 'C:\hostedtoolcache\windows\dotnet\dotnet.exe' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
##[warning]RetryHelper encountered task failure, will retry (attempt #: 1 out of 1) after 1000 ms
C:\Windows\system32\chcp.com 65001
Active code page: 65001
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
C:\hostedtoolcache\windows\dotnet\dotnet.exe test --logger trx;LogFileName=Java.Interop-Tests.trx --results-directory D:\a\_temp bin/TestRelease-net10.0/Java.Interop-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "D:\a\1\s\bin/TestRelease-net10.0/Java.Interop-Tests.dll" provided was not found.
##[error]Error: The process 'C:\hostedtoolcache\windows\dotnet\dotnet.exe' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
Finishing: Tests: Java.Interop (net10.0 - .NET - Windows)

CopilotAIand others
added 2 commits
June 8, 2026 13:39
@simonrozsival
Plan CI failure investigation
be4124f
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Remove deleted test assemblies from core CI template
c39003a
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
CopilotAI
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Jun 8, 2026

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@copilot CI is failing, try to fix it:
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted...

Fixed in c39003a. I removed the stale run-dotnet-test entries for deleted assemblies (Java.Interop-Tests, Java.Interop.Dynamic-Tests, Java.Interop-PerformanceTests, and Java.Base-Tests) from build-tools/automation/templates/core-tests.yaml, so CI no longer tries to run missing DLLs from bin/TestRelease-net10.0.
@simonrozsival
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Jun 8, 2026

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@copilot explain why we needed to remove these tests. Does it mean that without the full Java.Runtime.Environment, we can't run Java.Interop tests outside of dotnet/android?
CopilotAI
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Jun 8, 2026

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@copilot explain why we needed to remove these tests. Does it mean that without the full Java.Runtime.Environment, we can't run Java.Interop tests outside of dotnet/android?
Those tests were removed because they depended on the standalone Java.Runtime.Environment host that this PR deletes. Once that runtime path was removed, those assemblies were no longer produced, so keeping their CI entries only caused false red failures.
It does not mean Java.Interop as a whole can only be used with dotnet/android. It means this repo no longer carries the old desktop/JRE-specific runtime host+test harness. The removed test projects specifically exercised that host. To run equivalent runtime tests outside dotnet/android again, we’d need to add and maintain a new supported non-Android host path.
jonathanpeppers
jonathanpeppers
reviewed
Jun 8, 2026
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Comment threadexternal/xamarin-android-tools
@jonathanpeppers
Revert unintended xamarin-android-tools submodule change
630522e
Co-authored-by: jonathanpeppers <840039+jonathanpeppers@users.noreply.github.com>
CopilotAI
requested a review
from jonathanpeppersJune 8, 2026 16:37
@simonrozsival
Restore Java.Interop tests without JRE runtime
4e2297d
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@simonrozsivalsimonrozsival
changed the title
Remove standalone Java.Runtime.Environment runtime pathRemove Java.Runtime.Environment and keep Java.Interop tests runningJun 9, 2026
CopilotAIand others
added 2 commits
June 22, 2026 08:10
@simonrozsival
Merge remote-tracking branch 'origin/main' into remove-java-runtime-e…
a003dcd
…nvironment
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Implement new abstract JniValueManager members in Hello-NativeAOTFrom…
ed27671
…JNI sample
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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Jun 22, 2026

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@copilot update the branch with latest changes from main and fix these build errors:
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoLogo -NoProfile -NonInteractive -ExecutionPoli...

Updated the branch with latest origin/main (clean merge) and fixed the build errors in 81dc (latest commit).
The trimmable-type-map work made several JniRuntime.JniValueManager members abstract (CreatePeer, CreateValueCore, GetValueCore, GetValueMarshalerCore, CreateLocalObjectReferenceArgumentCore, ActivatePeer, ConstructPeerCore). Since this smoke sample never constructs managed peers (it only returns a Java string via raw JNI), I implemented those members in the sample's ValueManager as AOT-safe NotSupportedException stubs rather than reintroducing the reflection-based manager.
Validated:
  • dotnet build samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj -c Release — 0 warnings
  • dotnet publish -r linux-x64 — NativeAOT codegen completes with no IL trim/AOT warnings
  • dotnet test tests/Java.Interop-Tests — 671 passed, 0 failed, 4 skipped
@simonrozsival
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Jun 22, 2026

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@copilot fix failing build:
/usr/local/bin/pwsh -NoLogo -NoProfile -NonInteractive -Command . '/Users/runner/work/_temp/c200f9fa-3322-4cf3-8650-5b7159d65d36.ps1'
Determining projects to restore...
Restored /Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj (in 311 ms).
2 of 3 projects are up-to-date for restore.
Hello from Java!
JavaInteropRuntime.init : error : System.NotSupportedException: Please set CreationOptions.TypeManager! [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
at Java.Interop.JniRuntime..ctor(JniRuntime.CreationOptions) + 0x51e
at libHello-NativeAOTFromJNI!<BaseAddress>+0x78a8c
Unhandled exception. System.NotSupportedException: No available Java runtime to attach to. Please create one.
at Java.Interop.JniRuntime.get_CurrentRuntime() + 0x173
at Java.Interop.JniEnvironmentInfo..ctor() + 0x10
at Java.Interop.JniEnvironment.<>c.<.cctor>b__38_0() + 0x18
at System.Threading.ThreadLocal`1.GetValueSlow() + 0x25
at libHello-NativeAOTFromJNI!<BaseAddress>+0x786d1
/var/folders/d_/7cp7f2xj0m5gcp7ch5j2t7tc0000gn/T/MSBuildTemp/tmpdac8ca75ed214639b541fa75d6ccaa52.exec.cmd: line 2: 9273 Abort trap: 6 "/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App
/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targets(49,5): error MSB3073: The command ""/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App" exited with code 134. [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
Build FAILED.
JavaInteropRuntime.init : error : System.NotSupportedException: Please set CreationOptions.TypeManager! [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targets(49,5): error MSB3073: The command ""/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App" exited with code 134. [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
0 Warning(s)
2 Error(s)
Time Elapsed 00:00:01.68

@simonrozsival
Set CreationOptions.TypeManager in Hello-NativeAOTFromJNI sample runtime
d70097e
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
CopilotAI
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Jun 22, 2026

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@copilot fix failing build:
/usr/local/bin/pwsh -NoLogo -NoProfile -NonInteractive -Command . '/Users/runner/work/_temp/c200f9fa-3322-4cf3-8650-5b7159d65d36.ps1'

...
Fixed in the latest commit. The sample's ExistingJniRuntime wasn't setting CreationOptions.TypeManager, so JniRuntime's constructor threw NotSupportedException: Please set CreationOptions.TypeManager!. I added TypeManager = new JniRuntime.JniTypeManager () to the CreationOptions (the base JniTypeManager is concrete and AOT-safe — its virtuals return empty, which is sufficient since this smoke sample only returns a Java string via raw JNI and never resolves managed types).
Validated end-to-end on linux-x64: NativeAOT publish + running net/dot/jni/hello/App now prints:
Hello from Java!
Hello from .NET NativeAOT!
String returned to Java: Hello from .NET NativeAOT!

The runtime initializes with no exception.
@simonrozsival
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Jun 23, 2026

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@copilot fix the following build error:
CSC : error CS1566: Error reading resource 'Xamarin.Android.Tools.BytecodeTests.kotlin-gradle.Widgets.class' -- 'Could not find a part of the path '/Users/runner/work/1/s/tests/Xamarin.Android.Tools.Bytecode-Tests/kotlin-gradle/classes/xat/bytecode/tests/Widgets.class'.' [/Users/runner/work/1/s/tests/Xamarin.Android.Tools.Bytecode-Tests/Xamarin.Android.Tools.Bytecode-Tests.csproj]
0 Warning(s)
1 Error(s)

@simonrozsival
Isolate Kotlin Gradle test outputs per project
697b961
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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@copilot fix the following build error:
...
Fixed in 697b961. The Kotlin/Gradle fixture classes are now generated into each consuming test project's obj/ directory instead of a shared source-tree kotlin-gradle/classes directory, so parallel solution builds no longer race over the embedded Widgets.class resource.
Validated with dotnet build Java.Interop.sln -c Release from clean Kotlin outputs, plus Release builds/tests for Xamarin.Android.Tools.Bytecode-Tests and generator-Tests.
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🤖 Code Review — ✅ LGTM (with minor suggestions)
This is a clean, well-executed removal of the Java.Runtime.Environment project. The test-host runtime plumbing it provided (value/object-reference managers, JVM creation) is faithfully re-homed into tests/TestJVM/TestJVM.cs, the NativeAOT sample is made self-contained, and the native build is reworked to a static validation lib. CI is green (build + full Java.Interop test suite pass).
I diffed the ported ManagedValueManager / ManagedObjectReferenceManager against the deleted originals and verified:
  • gref/wgref counting is correct (incrementing on a valid result, decrementing on a valid input ref is the right asymmetry);
  • CreateJVM resource handling is sound — Dispose is idempotent, so the LoadJvmLibrary-throws path doesn't double-free;
  • the JavaVMInitArgs / JavaVMOption struct layouts (blittable, sequential) and the JNI_CreateJavaVMdelegate* unmanaged<...> signature match the JNI ABI.
I also confirmed there are no dangling references to the removed projects in the solution, Makefile, CI templates, or Sdk.targets, and that Hello-NativeAOTFromJNI (kept) is still exercised via the dedicated dotnet publish CI step rather than the solution.
Findings (non-blocking)
  • 💡 Documentation — tests/TestJVM/TestJVM.cs:478: the "why" comment about the Local-ref / SafeHandle.ReferenceType thread-locality invariant was dropped during the port.
  • 💡 MSBuild — samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj:41: hardcoded MacOSX15.sdk path will silently stop applying on future SDKs.
Nice touches
  • JniRuntimeJniValueManagerContract now binds the generic <ManagedValueManager> instead of Type.GetType("...Java.Runtime.Environment...") reflection — trimmer/AOT-friendly.
  • src/java-interop/CMakeLists.txt fixes a pre-existing foreach(dir in ${...}) syntax bug.
  • Makefilerun-net-tests gains the missing ; so every test assembly in the loop actually runs.
Verdict: ✅ LGTM — 0 ❌ · 0 ⚠️ · 2 💡. The two suggestions are optional and don't block merge.
Generated by Java.Interop PR Reviewer for issue #1447 · 2.5K AIC · ⌖ 46.9 AIC · ⊞ 34.6K
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Comment threadtests/TestJVM/TestJVM.cs
Comment threadsamples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj
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@jonathanpeppers
Merge origin/main and address review feedback
eea9765
- Resolve merge conflicts with main by keeping deletions of:
- samples/Hello-NativeAOTFromAndroid/NativeAotTypeManager.cs
- samples/Hello-NativeAOTFromJNI/NativeAotTypeManager.cs
- src/Java.Runtime.Environment/Java.Interop/JreTypeManager.cs
- Address review comments from PR 1447:
- Restore the "why" comment on ManagedValueManager.FinalizePeer
explaining why we use JniObjectReference.Type instead of
SafeHandle.ReferenceType (the latter is thread-local and returns
Invalid off-thread for Local refs).
- Replace the hard-coded MacOSX15.sdk -isysroot path in
Hello-NativeAOTFromJNI.csproj with a target that resolves the
macOS SDK dynamically via `xcrun --show-sdk-path`, so it keeps
working on newer SDKs and on machines with full Xcode installed.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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🤖 Code Review — Remove Java.Runtime.Environment, keep Java.Interop tests running
Verdict: ✅ Looks good — minor suggestions only (posting as a COMMENT, not an approval).
This is a careful, well-scoped refactor. I read the full tests/TestJVM/TestJVM.cs and diffed the new value/reference managers against the deleted Java.Runtime.Environment originals — the port is faithful. Things I independently verified:
  • ✅ The new CreateJVM / NativeLibraryJvmLibraryHandler JVM-bootstrap path is correct: the JNI_CreateJavaVM function-pointer signature (out IntPtr, out IntPtr, ref JavaVMInitArgs) maps to JavaVM** / void** / void*; marshaled option strings are freed in finally; and the library handle is disposed on every failure path (no double-dispose, LibraryHandler nulled on error).
  • ✅ JavaVMInitArgs.version is a 4-byte int-backed JniVersion enum, matching jint; struct field order matches the JNI layout.
  • ✅ JDK_OnlySupportsOneVM expects NotSupportedException, which CreateJVM throws on r != 0; the InvocationPointer-only path correctly short-circuits before creating a second VM.
  • ✅ Swapping Type.GetType ("..., Java.Runtime.Environment", throwOnError) for JniRuntimeJniValueManagerContract<ManagedValueManager> removes a reflection/trimming hazard — a nice trimmer/AOT win, and it justifies making ManagedValueManager public.
  • ✅ App.cs's sayHello uses JniTransition with proper try/catch/finally; JavaInteropRuntime.init intentionally avoids JniTransition (the runtime isn't initialized yet) and logs instead — both correct.
  • ✅ Remaining product-code edits (obsolete message text, InternalsVisibleTo removal, generator/JniPeerMembers comment cleanup, CMake/targets/Makefile/sln updates) are pure cleanup of references to the deleted assembly.
Issue counts: 0 ❌ · 0 ⚠️ · 2 💡 (both inline, non-blocking)
⚠️ CI not yet green: at review time only license/cla has completed — the dotnet.java-interop Azure build is still queued, so I can't independently confirm the build/tests pass. The PR description reports 669 passed, 0 failed, 4 skipped locally; please make sure the Azure build goes green before merging.
Note on scope: this PR intentionally removes Java.Base / Java.Runtime.Environment, the samples, and the performance/dynamic test suites, so that coverage goes away by design — the retained Java.Interop-Tests still exercise the core runtime through the rehosted TestJVM.
Thanks for the detailed description and the explicit "kept vs. removed" breakdown — it made reviewing 39k deleted lines tractable. Two small 💡 suggestions inline; nothing blocking.
Generated by Java.Interop PR Reviewer for issue #1447 · 1.7K AIC · ⌖ 49.6 AIC · ⊞ 34.6K
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Comment threadtests/TestJVM/TestJVM.cs
Comment threadtests/TestJVM/TestJVM.cs
jonathanpeppersand others
added 2 commits
June 26, 2026 08:12
@jonathanpeppers
Fix invalid -- in XML comment in Hello-NativeAOTFromJNI.csproj
aed3c97
XML comments cannot contain --, which broke MSBuild parsing of the
csproj on CI. Reword the comment to drop the literal --show-sdk-path`nflag reference so the project loads again.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppers
Sync Hello-NativeAOTFromJNI ValueManager DAM attributes with base
54ef878
PR #1481 (merged into main after this PR opened) removed some
[DynamicallyAccessedMembers] attributes from the base
JniRuntime.JniValueManager abstract methods. After merging main,
the sample's overrides still had the old DAM attributes, producing
IL2092/IL2095 'overridden members must have the same
DynamicallyAccessedMembersAttribute usage' errors when publishing
for NativeAOT.
Drop DAM from the sample overrides to match the new base signatures:
- ActivatePeer (Type type, ...)
- GetValueMarshalerCore<T> ()
- CreateLocalObjectReferenceArgumentCore (Type type, ...)
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppers
jonathanpeppers
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Jun 30, 2026
@jonathanpeppers
Remove Java.Runtime.Environment project from solution
871a945
The Java.Runtime.Environment project was removed upstream in dotnet/java-interop#1447 (commit 4e142449), so the reference in Xamarin.Android.sln no longer resolves and breaks restore.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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@dependabot@jonathanpeppers
Bump todotnet/java-interop@6ec1345(#11782)
ad3f04b
### Bump external/Java.Interop from `8d54473` to `6ec1345`
Bumps [external/Java.Interop](https://github.com/dotnet/java-interop) from `8d54473` to `6ec1345`.
- [Commits](dotnet/java-interop@8d54473...6ec1345)
---
updated-dependencies:
- dependency-name: external/Java.Interop
dependency-version: 6ec1345165fa7385c935f16ccaa8cc38be50a080
dependency-type: direct:production
...
### Remove Java.Runtime.Environment project from solution
The Java.Runtime.Environment project was removed upstream in dotnet/java-interop#1447 (commit 4e142449), so the reference in Xamarin.Android.sln no longer resolves and breaks restore.
### Suppress new IL3050 warnings in ManagedTypeManager
Upstream dotnet/java-interop#1474 added [RequiresDynamicCode] to:
- JniRuntime.ReflectionJniTypeManager (the class), surfacing IL3050 at ManagedTypeManager..ctor() since we derive from it.
- JniEnvironment.Types.RegisterNatives(.., JniNativeMethodRegistration[], int), surfacing IL3050 at ManagedTypeManager.RegisterNativeMembers.
Suppress for now; the JniNativeMethodRegistration[] registration path will be migrated to the blittable RegisterNatives(JniObjectReference, ReadOnlySpan<JniNativeMethod>) overload in a future change.
Co-authored-by: Jonathan Peppers <jonathan.peppers@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Jul 6, 2026
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injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
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Remove Java.Runtime.Environment and keep Java.Interop tests running - #1447
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Remove Java.Runtime.Environment and keep Java.Interop tests running#1447
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@simonrozsival
@simonrozsivalsimonrozsival
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Related to dotnet/android#11843
Summary
  • Remove the standalone src/Java.Runtime.Environment project and the desktop/JRE runtime path it provided.
  • Remove the samples, performance tests, dynamic tests, and Java.Base tests that depended on the old standalone runtime surface.
  • Keep Java.Interop-Tests in the solution and CI, and restore them to a passing state without bringing back the Java.Runtime.Environment assembly.
  • Remove the Java.Runtime.Environment friend-assembly dependency from Java.Interop; keep only the Java.Interop-Tests friend access needed by the restored tests.
  • Trim src/java-interop down to the native source subset still consumed by dotnet/android, while keeping a minimal validation project so those sources continue to compile in this repo.
  • Keep a minimal Hello-NativeAOTFromJNI smoke sample that proves Java can load a NativeAOT library, initialize JniRuntime from an existing JNIEnv*, and call into a native C# method.
Note on tests/TestJVM/TestJVM.cs
This file intentionally grew because it now owns the small amount of JVM-hosting/runtime plumbing that Java.Interop-Tests still need after deleting Java.Runtime.Environment.
The new code is test-only and replaces the old TestJVM : JreRuntime dependency with a direct TestJVM : JniRuntime host. It keeps only the pieces needed by the core tests:
  • JNI_CreateJavaVM loading through NativeLibrary
  • classpath setup for java-interop.jar and interop-test.jar
  • JDK/JVM path discovery from JdkInfo.props or installed JDKs
  • a minimal object reference manager for global/weak-global reference counts
  • a minimal managed value manager for peer registration/lookup/finalization
  • a test type manager for the explicit Java type mappings used by the suite
It deliberately does not reintroduce the old product/runtime API surface such as JreRuntime, JreRuntimeOptions, Mono runtime managers, standalone runtime packaging, reference-log plumbing, or the native java-interop JVM loader path. The restored tests/test host have no remaining Java.Runtime.Environment references.
Note on samples/Hello-NativeAOTFromJNI
The old sample depended on Java.Runtime.Environment, so this PR restores it as a smaller smoke test instead of bringing back the old sample wholesale.
The new sample:
  • publishes a NativeAOT shared library,
  • lets Java load it with System.loadLibrary("Hello-NativeAOTFromJNI"),
  • initializes a sample-local JniRuntime from the existing JNIEnv*, and
  • calls a native C# sayHello() method that returns a Java string.
It does not exercise managed peer construction or generated JCWs; those can be added later with explicit support if we want a broader NativeAOT/JNI sample.
Validation
  • dotnet build -t:Prepare
  • dotnet build src/java-interop/java-interop.csproj
  • dotnet build src/Java.Interop/Java.Interop.csproj --no-restore
  • dotnet build tests/Java.Interop-Tests/Java.Interop-Tests.csproj --no-restore
  • dotnet test tests/Java.Interop-Tests/Java.Interop-Tests.csproj --no-build — 669 passed, 0 failed, 4 skipped
  • dotnet publish -c Release -r osx-arm64 samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj
  • dotnet build -c Release -r osx-arm64 -t:RunJavaSample samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj --no-restore
CopilotAI
review requested due to automatic review settings
June 8, 2026 10:23
@simonrozsival
Remove Java.Runtime.Environment runtime path
97ce2d3
Remove the standalone JRE runtime project and its sample/test consumers from the Java.Interop submodule. This keeps the core Java.Interop build path while dropping the desktop/JRE-oriented runtime pieces that are not needed by the main Android SDK.
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Pull request overview
This PR removes the standalone Java.Runtime.Environment project and its desktop/JRE-oriented test & sample consumers, and updates build/docs metadata to reflect the cleanup and discourage desktop-specific runtime helper usage at the Java.Interop layer.
Changes:
  • Removed src/Java.Runtime.Environment and all dependent test/sample projects that were built around a standalone desktop/JRE runtime.
  • Removed JVM-based test suites and performance/overhead benchmarks that depended on the removed runtime path.
  • Updated JniRuntime.GetAvailableInvocationPointers() obsolete guidance, the repo Makefile, and .github/copilot-instructions.md to align with the new shape.
Show a summary per file
FileDescription
tests/TestJVM/TestJVM.csprojRemoved TestJVM helper project (desktop/JRE runtime dependency).
tests/TestJVM/TestJVM.csRemoved TestJVM helper runtime implementation.
tests/Java.Interop.Dynamic-Tests/Java.Interop/JavaVMFixture.csRemoved Dynamic test fixture relying on TestJVM/JRE runtime.
tests/Java.Interop.Dynamic-Tests/Java.Interop/DynamicJavaInstanceTests.csRemoved Dynamic JVM-based test coverage.
tests/Java.Interop.Dynamic-Tests/Java.Interop/DynamicJavaClassTests.csRemoved Dynamic JVM-based test coverage.
tests/Java.Interop.Dynamic-Tests/Java.Interop.Dynamic-Tests.csprojRemoved Dynamic test project and its JRE runtime references.
tests/Java.Interop-Tests/java/net/dot/jni/test/TestType.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/SelfRegistration.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassDerived.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassBase2.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassBase1.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RegisterNativesTestType.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/ObjectHelper.javaRemoved Java-side helper used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/MyJavaInterfaceImpl.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/JavaInterface.javaRemoved Java-side interface used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/GetThis.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/DesugarAndroidInterface$_CC.javaRemoved Java-side desugar test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CrossReferenceBridge.javaRemoved Java-side GC bridge/cross-ref test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallVirtualFromConstructorDerived.javaRemoved Java-side constructor-virtual-call test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallVirtualFromConstructorBase.javaRemoved Java-side constructor-virtual-call test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualDerived2.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualDerived.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualBase.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/AnotherJavaInterfaceImpl.javaRemoved Java-side interface impl used by tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/AndroidInterface.javaRemoved Java-side interface used for desugar-related tests.
tests/Java.Interop-Tests/Java.Interop/TestTypeTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/SelfRegistrationTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/SelfRegistration.csRemoved managed type used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/MethodBindingTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniValueMarshalerAttributeTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTypeSignatureTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTypeSignatureAttributeTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTransitionTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntimeTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntime.JniValueManagerTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntime.JniTypeManagerTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniReferenceSafeHandleTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniMarshalTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniInstanceMethodIDTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniEnvironmentTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JavaVMFixture.Partial.csRemoved JVM fixture scaffolding.
tests/Java.Interop-Tests/Java.Interop/JavaVMFixture.csRemoved JVM fixture setup & type-manager mapping logic.
tests/Java.Interop-Tests/Java.Interop/JavaSingleArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaSByteArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaPrimitiveArrayContract.csRemoved JVM-based contract test base class.
tests/Java.Interop-Tests/Java.Interop/JavaPeerableExtensionsTests.csRemoved JVM-based extension tests and related managed bindings.
tests/Java.Interop-Tests/Java.Interop/JavaObjectExtensionsTests.csRemoved JVM-based extension tests.
tests/Java.Interop-Tests/Java.Interop/JavaObjectArrayTest.csRemoved JVM-based object array contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaManagedGCBridgeTests.csRemoved JVM-based GC bridge tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt64ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt32ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt16ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaExceptionTests.csRemoved JVM-based exception interop tests.
tests/Java.Interop-Tests/Java.Interop/JavaDoubleArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaCharArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaBooleanArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaArrayContract.csRemoved JVM-based contract test base class.
tests/Java.Interop-Tests/Java.Interop/InvokeVirtualFromConstructorTests.csRemoved JVM-based constructor dispatch tests.
tests/Java.Interop-Tests/Java.Interop/GetThis.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/FinalizerHelpers.csRemoved helper used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallVirtualFromConstructorDerived.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallVirtualFromConstructorBase.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualDerived2.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualDerived.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualBase.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop-Tests.targetsRemoved MSBuild logic for building interop-test.jar and JCWs.
tests/Java.Interop-Tests/Java.Interop-Tests.csprojRemoved JVM-based Java.Interop test project.
tests/Java.Interop-Tests/Cadenza/BaseRocksFixture.csRemoved Cadenza test fixture that depended on JavaVMFixture.
tests/Java.Interop-Tests/Cadenza.Collections/ListContract.csRemoved Cadenza collection contract tests.
tests/Java.Interop-Tests/Cadenza.Collections/EnumerableContract.csRemoved Cadenza enumerable contract tests.
tests/Java.Interop-PerformanceTests/java/com/xamarin/interop/performance/JavaTiming.javaRemoved Java-side performance benchmark fixture.
tests/Java.Interop-PerformanceTests/Java.Interop/JavaVMFixture.csRemoved perf test fixture relying on TestJVM.
tests/Java.Interop-PerformanceTests/Java.Interop/JavaPrimitiveArraysTiming.csRemoved perf tests and benchmark helpers.
tests/Java.Interop-PerformanceTests/Java.Interop-PerformanceTests.targetsRemoved perf test JAR build target.
tests/Java.Interop-PerformanceTests/Java.Interop-PerformanceTests.csprojRemoved performance test project.
tests/Java.Base-Tests/java/net/dot/jni/test/PublicInterface.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/net/dot/jni/test/InterfaceMethodInheritance.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/net/dot/jni/test/HasInterfaceMethodInheritance.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/com/microsoft/java_base_tests/Invoker.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/Java.Base/NestedTypeTests.csRemoved Java.Base JVM-based tests.
tests/Java.Base-Tests/Java.Base/JniRuntimeJniValueManagerContractExtras.csRemoved Java.Base JVM-based tests.
tests/Java.Base-Tests/Java.Base/JavaVMFixture.Partial.csRemoved Java.Base test fixture scaffolding.
tests/Java.Base-Tests/Java.Base/JavaVMFixture.csRemoved Java.Base fixture setup using TestJVM.
tests/Java.Base-Tests/Java.Base/JavaToManagedTests.csRemoved Java→managed callback tests.
tests/Java.Base-Tests/Java.Base/InterfaceMethodInheritanceTests.csRemoved interface inheritance tests.
tests/Java.Base-Tests/Java.Base-Tests.targetsRemoved Java.Base test targets.
tests/Java.Base-Tests/Java.Base-Tests.csprojRemoved Java.Base test project.
tests/invocation-overhead/README.mdRemoved standalone invocation-overhead benchmark documentation.
tests/invocation-overhead/MakefileRemoved invocation-overhead build helpers.
tests/invocation-overhead/invocation-overhead.targetsRemoved invocation-overhead MSBuild targets.
tests/invocation-overhead/invocation-overhead.csprojRemoved invocation-overhead benchmark project.
src/Java.Runtime.Environment/Properties/AssemblyInfo.csRemoved standalone runtime assembly configuration.
src/Java.Runtime.Environment/Java.Runtime.Environment.targetsRemoved standalone runtime MSBuild logic.
src/Java.Runtime.Environment/Java.Runtime.Environment.dll.config.inRemoved template for dllmap config generation.
src/Java.Runtime.Environment/Java.Runtime.Environment.csprojRemoved standalone runtime project.
src/Java.Runtime.Environment/Java.Interop/JreTypeManager.csRemoved JRE-specific type manager implementation.
src/Java.Runtime.Environment/.gitignoreRemoved ignore entry for generated runtime config.
src/Java.Interop/Properties/AssemblyInfo.csRemoved InternalsVisibleTo entries for deleted assemblies/tests.
src/Java.Interop/Java.Interop/JniRuntime.csUpdated obsolete guidance to avoid referencing removed desktop runtime helpers.
samples/Hello-NativeAOTFromJNI/README.mdRemoved desktop/JRE-oriented sample docs.
samples/Hello-NativeAOTFromJNI/NativeAotTypeManager.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/ManagedType.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/JavaInteropRuntime.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/JavaCallableAttributes.csRemoved sample-only callable attribute definitions.
samples/Hello-NativeAOTFromJNI/java/net/dot/jni/hello/JavaInteropRuntime.javaRemoved Java launcher/runtime sample code.
samples/Hello-NativeAOTFromJNI/java/net/dot/jni/hello/App.javaRemoved Java launcher sample code.
samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targetsRemoved sample build targets (JCW + jar).
samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csprojRemoved NativeAOT-from-JNI sample project.
samples/Hello-NativeAOTFromJNI/App.csRemoved sample native entrypoint code.
samples/Hello-NativeAOTFromAndroid/Transforms/Metadata.xmlRemoved Android NativeAOT sample transform metadata.
samples/Hello-NativeAOTFromAndroid/settings.gradleRemoved Android NativeAOT Gradle settings.
samples/Hello-NativeAOTFromAndroid/NativeAotTypeManager.csRemoved Android NativeAOT sample type manager.
samples/Hello-NativeAOTFromAndroid/MainActivity.csRemoved Android NativeAOT managed activity sample.
samples/Hello-NativeAOTFromAndroid/LogcatTextWriter.csRemoved Android NativeAOT logging helper.
samples/Hello-NativeAOTFromAndroid/JavaInteropRuntime.csRemoved Android NativeAOT runtime init code.
samples/Hello-NativeAOTFromAndroid/Hello-NativeAOTFromAndroid.csprojRemoved Android NativeAOT sample project.
samples/Hello-NativeAOTFromAndroid/gradle.propertiesRemoved Android NativeAOT sample config.
samples/Hello-NativeAOTFromAndroid/build.gradleRemoved Android NativeAOT sample build script.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/values/strings.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/layout/activity_main.xmlRemoved Android sample layout.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/drawable/ic_launcher_background.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/drawable-v24/ic_launcher_foreground.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/NativeAotRuntimeProvider.javaRemoved Android sample Java bootstrapping.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/JavaMainActivity.javaRemoved Android sample Java activity.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/JavaInteropRuntime.javaRemoved Android sample Java runtime loader.
samples/Hello-NativeAOTFromAndroid/app/src/main/AndroidManifest.xmlRemoved Android sample manifest.
samples/Hello-NativeAOTFromAndroid/app/proguard-rules.proRemoved Android sample ProGuard rules.
samples/Hello-NativeAOTFromAndroid/app/build.gradleRemoved Android sample module build script.
samples/Hello-NativeAOTFromAndroid/app/.gitignoreRemoved Android sample ignores.
samples/Hello-NativeAOTFromAndroid/android.xmlRemoved Android sample API XML input.
samples/Hello-NativeAOTFromAndroid/.gitignoreRemoved Android sample ignores.
samples/Hello-Java.Base/Program.csRemoved desktop/JRE-oriented sample program.
samples/Hello-Java.Base/Hello-Java.Base.csprojRemoved desktop/JRE-oriented sample project.
samples/Hello-Core/README.mdRemoved desktop/JRE-oriented sample docs.
samples/Hello-Core/Program.csRemoved desktop/JRE-oriented sample program.
samples/Hello-Core/Hello-Core.csprojRemoved desktop/JRE-oriented sample project.
MakefileUpdated build metadata, but currently still references removed test outputs (needs further adjustment).
.github/copilot-instructions.mdUpdated repository guidance to reflect removed runtime/tests and updated validation commands.
Copilot's findings
  • Files reviewed: 162/178 changed files
  • Comments generated: 1
Comment threadMakefile
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@simonrozsival
simonrozsivalforce-pushed
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58ec716CompareJune 8, 2026 10:33
@simonrozsival
Fix Makefile test targets after JRE cleanup
a18c60f
Update the Makefile test lists to match the remaining managed test projects and stop building removed desktop/JRE test outputs.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@simonrozsival
simonrozsival
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Jun 8, 2026

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@copilot there seem to be many failing tests, so the PR is still not in good shape:
...
Failed GeneratedOK [48 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.StaticMethods.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/StaticMethods.cs:line 12
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
Failed GeneratedOK [44 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.StaticProperties.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/StaticProperties.cs:line 12
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
Failed GeneratedOK [61 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.Streams.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Streams.cs:line 12

CopilotAIand others
added 2 commits
June 8, 2026 12:09
@simonrozsival
Plan investigation for failing generator tests
ff097ff
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Fix generator-Tests Java.Interop dependency
6fb38a7
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
CopilotAI
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Jun 8, 2026

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@copilot there seem to be many failing tests, so the PR is still not in good shape:
...

...
Fixed in 6fb38a7. I added an explicit ProjectReference to src/Java.Interop/Java.Interop.csproj in tests/generator-Tests/generator-Tests.csproj, so Java.Interop.dll is now copied into bin/Test*-net10.0 for the integration compiler references. I also restored src/Java.Base-ref.cs to the pre-plan state to remove the accidental unrelated delta.
@simonrozsival
simonrozsival
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Jun 8, 2026

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@copilot CI is failing, try to fix it:
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
/Users/runner/hostedtoolcache/dotnet/dotnet test --logger trx;LogFileName=Java.Interop.Dynamic-Tests.trx --results-directory /Users/runner/work/_temp bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll" provided was not found.
##[error]Error: The process '/Users/runner/hostedtoolcache/dotnet/dotnet' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
##[warning]RetryHelper encountered task failure, will retry (attempt #: 1 out of 1) after 1000 ms
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
/Users/runner/hostedtoolcache/dotnet/dotnet test --logger trx;LogFileName=Java.Interop.Dynamic-Tests.trx --results-directory /Users/runner/work/_temp bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll" provided was not found.
##[error]Error: The process '/Users/runner/hostedtoolcache/dotnet/dotnet' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
Finishing: Tests: Java.Interop.Dynamic (.NET - MacOS)

or
The test source file "D:\a\1\s\bin/TestRelease-net10.0/Java.Interop-Tests.dll" provided was not found.
##[error]Error: The process 'C:\hostedtoolcache\windows\dotnet\dotnet.exe' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
##[warning]RetryHelper encountered task failure, will retry (attempt #: 1 out of 1) after 1000 ms
C:\Windows\system32\chcp.com 65001
Active code page: 65001
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
C:\hostedtoolcache\windows\dotnet\dotnet.exe test --logger trx;LogFileName=Java.Interop-Tests.trx --results-directory D:\a\_temp bin/TestRelease-net10.0/Java.Interop-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "D:\a\1\s\bin/TestRelease-net10.0/Java.Interop-Tests.dll" provided was not found.
##[error]Error: The process 'C:\hostedtoolcache\windows\dotnet\dotnet.exe' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
Finishing: Tests: Java.Interop (net10.0 - .NET - Windows)

CopilotAIand others
added 2 commits
June 8, 2026 13:39
@simonrozsival
Plan CI failure investigation
be4124f
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Remove deleted test assemblies from core CI template
c39003a
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
CopilotAI
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Jun 8, 2026

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@copilot CI is failing, try to fix it:
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted...

Fixed in c39003a. I removed the stale run-dotnet-test entries for deleted assemblies (Java.Interop-Tests, Java.Interop.Dynamic-Tests, Java.Interop-PerformanceTests, and Java.Base-Tests) from build-tools/automation/templates/core-tests.yaml, so CI no longer tries to run missing DLLs from bin/TestRelease-net10.0.
@simonrozsival
simonrozsival
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Jun 8, 2026

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@copilot explain why we needed to remove these tests. Does it mean that without the full Java.Runtime.Environment, we can't run Java.Interop tests outside of dotnet/android?
CopilotAI
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Jun 8, 2026

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@copilot explain why we needed to remove these tests. Does it mean that without the full Java.Runtime.Environment, we can't run Java.Interop tests outside of dotnet/android?
Those tests were removed because they depended on the standalone Java.Runtime.Environment host that this PR deletes. Once that runtime path was removed, those assemblies were no longer produced, so keeping their CI entries only caused false red failures.
It does not mean Java.Interop as a whole can only be used with dotnet/android. It means this repo no longer carries the old desktop/JRE-specific runtime host+test harness. The removed test projects specifically exercised that host. To run equivalent runtime tests outside dotnet/android again, we’d need to add and maintain a new supported non-Android host path.
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@jonathanpeppers
Revert unintended xamarin-android-tools submodule change
630522e
Co-authored-by: jonathanpeppers <840039+jonathanpeppers@users.noreply.github.com>
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from jonathanpeppersJune 8, 2026 16:37
@simonrozsival
Restore Java.Interop tests without JRE runtime
4e2297d
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@simonrozsivalsimonrozsival
changed the title
Remove standalone Java.Runtime.Environment runtime pathRemove Java.Runtime.Environment and keep Java.Interop tests runningJun 9, 2026
CopilotAIand others
added 2 commits
June 22, 2026 08:10
@simonrozsival
Merge remote-tracking branch 'origin/main' into remove-java-runtime-e…
a003dcd
…nvironment
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Implement new abstract JniValueManager members in Hello-NativeAOTFrom…
ed27671
…JNI sample
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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@copilot update the branch with latest changes from main and fix these build errors:
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoLogo -NoProfile -NonInteractive -ExecutionPoli...

Updated the branch with latest origin/main (clean merge) and fixed the build errors in 81dc (latest commit).
The trimmable-type-map work made several JniRuntime.JniValueManager members abstract (CreatePeer, CreateValueCore, GetValueCore, GetValueMarshalerCore, CreateLocalObjectReferenceArgumentCore, ActivatePeer, ConstructPeerCore). Since this smoke sample never constructs managed peers (it only returns a Java string via raw JNI), I implemented those members in the sample's ValueManager as AOT-safe NotSupportedException stubs rather than reintroducing the reflection-based manager.
Validated:
  • dotnet build samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj -c Release — 0 warnings
  • dotnet publish -r linux-x64 — NativeAOT codegen completes with no IL trim/AOT warnings
  • dotnet test tests/Java.Interop-Tests — 671 passed, 0 failed, 4 skipped
@simonrozsival
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Jun 22, 2026

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@copilot fix failing build:
/usr/local/bin/pwsh -NoLogo -NoProfile -NonInteractive -Command . '/Users/runner/work/_temp/c200f9fa-3322-4cf3-8650-5b7159d65d36.ps1'
Determining projects to restore...
Restored /Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj (in 311 ms).
2 of 3 projects are up-to-date for restore.
Hello from Java!
JavaInteropRuntime.init : error : System.NotSupportedException: Please set CreationOptions.TypeManager! [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
at Java.Interop.JniRuntime..ctor(JniRuntime.CreationOptions) + 0x51e
at libHello-NativeAOTFromJNI!<BaseAddress>+0x78a8c
Unhandled exception. System.NotSupportedException: No available Java runtime to attach to. Please create one.
at Java.Interop.JniRuntime.get_CurrentRuntime() + 0x173
at Java.Interop.JniEnvironmentInfo..ctor() + 0x10
at Java.Interop.JniEnvironment.<>c.<.cctor>b__38_0() + 0x18
at System.Threading.ThreadLocal`1.GetValueSlow() + 0x25
at libHello-NativeAOTFromJNI!<BaseAddress>+0x786d1
/var/folders/d_/7cp7f2xj0m5gcp7ch5j2t7tc0000gn/T/MSBuildTemp/tmpdac8ca75ed214639b541fa75d6ccaa52.exec.cmd: line 2: 9273 Abort trap: 6 "/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App
/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targets(49,5): error MSB3073: The command ""/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App" exited with code 134. [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
Build FAILED.
JavaInteropRuntime.init : error : System.NotSupportedException: Please set CreationOptions.TypeManager! [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targets(49,5): error MSB3073: The command ""/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App" exited with code 134. [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
0 Warning(s)
2 Error(s)
Time Elapsed 00:00:01.68

@simonrozsival
Set CreationOptions.TypeManager in Hello-NativeAOTFromJNI sample runtime
d70097e
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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@copilot fix failing build:
/usr/local/bin/pwsh -NoLogo -NoProfile -NonInteractive -Command . '/Users/runner/work/_temp/c200f9fa-3322-4cf3-8650-5b7159d65d36.ps1'

...
Fixed in the latest commit. The sample's ExistingJniRuntime wasn't setting CreationOptions.TypeManager, so JniRuntime's constructor threw NotSupportedException: Please set CreationOptions.TypeManager!. I added TypeManager = new JniRuntime.JniTypeManager () to the CreationOptions (the base JniTypeManager is concrete and AOT-safe — its virtuals return empty, which is sufficient since this smoke sample only returns a Java string via raw JNI and never resolves managed types).
Validated end-to-end on linux-x64: NativeAOT publish + running net/dot/jni/hello/App now prints:
Hello from Java!
Hello from .NET NativeAOT!
String returned to Java: Hello from .NET NativeAOT!

The runtime initializes with no exception.
@simonrozsival
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Jun 23, 2026

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@copilot fix the following build error:
CSC : error CS1566: Error reading resource 'Xamarin.Android.Tools.BytecodeTests.kotlin-gradle.Widgets.class' -- 'Could not find a part of the path '/Users/runner/work/1/s/tests/Xamarin.Android.Tools.Bytecode-Tests/kotlin-gradle/classes/xat/bytecode/tests/Widgets.class'.' [/Users/runner/work/1/s/tests/Xamarin.Android.Tools.Bytecode-Tests/Xamarin.Android.Tools.Bytecode-Tests.csproj]
0 Warning(s)
1 Error(s)

@simonrozsival
Isolate Kotlin Gradle test outputs per project
697b961
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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@copilot fix the following build error:
...
Fixed in 697b961. The Kotlin/Gradle fixture classes are now generated into each consuming test project's obj/ directory instead of a shared source-tree kotlin-gradle/classes directory, so parallel solution builds no longer race over the embedded Widgets.class resource.
Validated with dotnet build Java.Interop.sln -c Release from clean Kotlin outputs, plus Release builds/tests for Xamarin.Android.Tools.Bytecode-Tests and generator-Tests.
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🤖 Code Review — ✅ LGTM (with minor suggestions)
This is a clean, well-executed removal of the Java.Runtime.Environment project. The test-host runtime plumbing it provided (value/object-reference managers, JVM creation) is faithfully re-homed into tests/TestJVM/TestJVM.cs, the NativeAOT sample is made self-contained, and the native build is reworked to a static validation lib. CI is green (build + full Java.Interop test suite pass).
I diffed the ported ManagedValueManager / ManagedObjectReferenceManager against the deleted originals and verified:
  • gref/wgref counting is correct (incrementing on a valid result, decrementing on a valid input ref is the right asymmetry);
  • CreateJVM resource handling is sound — Dispose is idempotent, so the LoadJvmLibrary-throws path doesn't double-free;
  • the JavaVMInitArgs / JavaVMOption struct layouts (blittable, sequential) and the JNI_CreateJavaVMdelegate* unmanaged<...> signature match the JNI ABI.
I also confirmed there are no dangling references to the removed projects in the solution, Makefile, CI templates, or Sdk.targets, and that Hello-NativeAOTFromJNI (kept) is still exercised via the dedicated dotnet publish CI step rather than the solution.
Findings (non-blocking)
  • 💡 Documentation — tests/TestJVM/TestJVM.cs:478: the "why" comment about the Local-ref / SafeHandle.ReferenceType thread-locality invariant was dropped during the port.
  • 💡 MSBuild — samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj:41: hardcoded MacOSX15.sdk path will silently stop applying on future SDKs.
Nice touches
  • JniRuntimeJniValueManagerContract now binds the generic <ManagedValueManager> instead of Type.GetType("...Java.Runtime.Environment...") reflection — trimmer/AOT-friendly.
  • src/java-interop/CMakeLists.txt fixes a pre-existing foreach(dir in ${...}) syntax bug.
  • Makefilerun-net-tests gains the missing ; so every test assembly in the loop actually runs.
Verdict: ✅ LGTM — 0 ❌ · 0 ⚠️ · 2 💡. The two suggestions are optional and don't block merge.
Generated by Java.Interop PR Reviewer for issue #1447 · 2.5K AIC · ⌖ 46.9 AIC · ⊞ 34.6K
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Comment threadtests/TestJVM/TestJVM.cs
Comment threadsamples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj
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@jonathanpeppers
Merge origin/main and address review feedback
eea9765
- Resolve merge conflicts with main by keeping deletions of:
- samples/Hello-NativeAOTFromAndroid/NativeAotTypeManager.cs
- samples/Hello-NativeAOTFromJNI/NativeAotTypeManager.cs
- src/Java.Runtime.Environment/Java.Interop/JreTypeManager.cs
- Address review comments from PR 1447:
- Restore the "why" comment on ManagedValueManager.FinalizePeer
explaining why we use JniObjectReference.Type instead of
SafeHandle.ReferenceType (the latter is thread-local and returns
Invalid off-thread for Local refs).
- Replace the hard-coded MacOSX15.sdk -isysroot path in
Hello-NativeAOTFromJNI.csproj with a target that resolves the
macOS SDK dynamically via `xcrun --show-sdk-path`, so it keeps
working on newer SDKs and on machines with full Xcode installed.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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🤖 Code Review — Remove Java.Runtime.Environment, keep Java.Interop tests running
Verdict: ✅ Looks good — minor suggestions only (posting as a COMMENT, not an approval).
This is a careful, well-scoped refactor. I read the full tests/TestJVM/TestJVM.cs and diffed the new value/reference managers against the deleted Java.Runtime.Environment originals — the port is faithful. Things I independently verified:
  • ✅ The new CreateJVM / NativeLibraryJvmLibraryHandler JVM-bootstrap path is correct: the JNI_CreateJavaVM function-pointer signature (out IntPtr, out IntPtr, ref JavaVMInitArgs) maps to JavaVM** / void** / void*; marshaled option strings are freed in finally; and the library handle is disposed on every failure path (no double-dispose, LibraryHandler nulled on error).
  • ✅ JavaVMInitArgs.version is a 4-byte int-backed JniVersion enum, matching jint; struct field order matches the JNI layout.
  • ✅ JDK_OnlySupportsOneVM expects NotSupportedException, which CreateJVM throws on r != 0; the InvocationPointer-only path correctly short-circuits before creating a second VM.
  • ✅ Swapping Type.GetType ("..., Java.Runtime.Environment", throwOnError) for JniRuntimeJniValueManagerContract<ManagedValueManager> removes a reflection/trimming hazard — a nice trimmer/AOT win, and it justifies making ManagedValueManager public.
  • ✅ App.cs's sayHello uses JniTransition with proper try/catch/finally; JavaInteropRuntime.init intentionally avoids JniTransition (the runtime isn't initialized yet) and logs instead — both correct.
  • ✅ Remaining product-code edits (obsolete message text, InternalsVisibleTo removal, generator/JniPeerMembers comment cleanup, CMake/targets/Makefile/sln updates) are pure cleanup of references to the deleted assembly.
Issue counts: 0 ❌ · 0 ⚠️ · 2 💡 (both inline, non-blocking)
⚠️ CI not yet green: at review time only license/cla has completed — the dotnet.java-interop Azure build is still queued, so I can't independently confirm the build/tests pass. The PR description reports 669 passed, 0 failed, 4 skipped locally; please make sure the Azure build goes green before merging.
Note on scope: this PR intentionally removes Java.Base / Java.Runtime.Environment, the samples, and the performance/dynamic test suites, so that coverage goes away by design — the retained Java.Interop-Tests still exercise the core runtime through the rehosted TestJVM.
Thanks for the detailed description and the explicit "kept vs. removed" breakdown — it made reviewing 39k deleted lines tractable. Two small 💡 suggestions inline; nothing blocking.
Generated by Java.Interop PR Reviewer for issue #1447 · 1.7K AIC · ⌖ 49.6 AIC · ⊞ 34.6K
Comment /review to run again
Comment threadtests/TestJVM/TestJVM.cs
Comment threadtests/TestJVM/TestJVM.cs
jonathanpeppersand others
added 2 commits
June 26, 2026 08:12
@jonathanpeppers
Fix invalid -- in XML comment in Hello-NativeAOTFromJNI.csproj
aed3c97
XML comments cannot contain --, which broke MSBuild parsing of the
csproj on CI. Reword the comment to drop the literal --show-sdk-path`nflag reference so the project loads again.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppers
Sync Hello-NativeAOTFromJNI ValueManager DAM attributes with base
54ef878
PR #1481 (merged into main after this PR opened) removed some
[DynamicallyAccessedMembers] attributes from the base
JniRuntime.JniValueManager abstract methods. After merging main,
the sample's overrides still had the old DAM attributes, producing
IL2092/IL2095 'overridden members must have the same
DynamicallyAccessedMembersAttribute usage' errors when publishing
for NativeAOT.
Drop DAM from the sample overrides to match the new base signatures:
- ActivatePeer (Type type, ...)
- GetValueMarshalerCore<T> ()
- CreateLocalObjectReferenceArgumentCore (Type type, ...)
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppers
jonathanpeppers
merged commit 4e14244
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@jonathanpeppers
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deleted the

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June 26, 2026 15:19
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Jun 30, 2026
@jonathanpeppers
Remove Java.Runtime.Environment project from solution
871a945
The Java.Runtime.Environment project was removed upstream in dotnet/java-interop#1447 (commit 4e142449), so the reference in Xamarin.Android.sln no longer resolves and breaks restore.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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@dependabot@jonathanpeppers
Bump todotnet/java-interop@6ec1345(#11782)
ad3f04b
### Bump external/Java.Interop from `8d54473` to `6ec1345`
Bumps [external/Java.Interop](https://github.com/dotnet/java-interop) from `8d54473` to `6ec1345`.
- [Commits](dotnet/java-interop@8d54473...6ec1345)
---
updated-dependencies:
- dependency-name: external/Java.Interop
dependency-version: 6ec1345165fa7385c935f16ccaa8cc38be50a080
dependency-type: direct:production
...
### Remove Java.Runtime.Environment project from solution
The Java.Runtime.Environment project was removed upstream in dotnet/java-interop#1447 (commit 4e142449), so the reference in Xamarin.Android.sln no longer resolves and breaks restore.
### Suppress new IL3050 warnings in ManagedTypeManager
Upstream dotnet/java-interop#1474 added [RequiresDynamicCode] to:
- JniRuntime.ReflectionJniTypeManager (the class), surfacing IL3050 at ManagedTypeManager..ctor() since we derive from it.
- JniEnvironment.Types.RegisterNatives(.., JniNativeMethodRegistration[], int), surfacing IL3050 at ManagedTypeManager.RegisterNativeMembers.
Suppress for now; the JniNativeMethodRegistration[] registration path will be migrated to the blittable RegisterNatives(JniObjectReference, ReadOnlySpan<JniNativeMethod>) overload in a future change.
Co-authored-by: Jonathan Peppers <jonathan.peppers@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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mentioned this pull request
Jul 6, 2026
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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Remove Java.Runtime.Environment and keep Java.Interop tests running - #1447
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Remove Java.Runtime.Environment and keep Java.Interop tests running#1447
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Related to dotnet/android#11843
Summary
  • Remove the standalone src/Java.Runtime.Environment project and the desktop/JRE runtime path it provided.
  • Remove the samples, performance tests, dynamic tests, and Java.Base tests that depended on the old standalone runtime surface.
  • Keep Java.Interop-Tests in the solution and CI, and restore them to a passing state without bringing back the Java.Runtime.Environment assembly.
  • Remove the Java.Runtime.Environment friend-assembly dependency from Java.Interop; keep only the Java.Interop-Tests friend access needed by the restored tests.
  • Trim src/java-interop down to the native source subset still consumed by dotnet/android, while keeping a minimal validation project so those sources continue to compile in this repo.
  • Keep a minimal Hello-NativeAOTFromJNI smoke sample that proves Java can load a NativeAOT library, initialize JniRuntime from an existing JNIEnv*, and call into a native C# method.
Note on tests/TestJVM/TestJVM.cs
This file intentionally grew because it now owns the small amount of JVM-hosting/runtime plumbing that Java.Interop-Tests still need after deleting Java.Runtime.Environment.
The new code is test-only and replaces the old TestJVM : JreRuntime dependency with a direct TestJVM : JniRuntime host. It keeps only the pieces needed by the core tests:
  • JNI_CreateJavaVM loading through NativeLibrary
  • classpath setup for java-interop.jar and interop-test.jar
  • JDK/JVM path discovery from JdkInfo.props or installed JDKs
  • a minimal object reference manager for global/weak-global reference counts
  • a minimal managed value manager for peer registration/lookup/finalization
  • a test type manager for the explicit Java type mappings used by the suite
It deliberately does not reintroduce the old product/runtime API surface such as JreRuntime, JreRuntimeOptions, Mono runtime managers, standalone runtime packaging, reference-log plumbing, or the native java-interop JVM loader path. The restored tests/test host have no remaining Java.Runtime.Environment references.
Note on samples/Hello-NativeAOTFromJNI
The old sample depended on Java.Runtime.Environment, so this PR restores it as a smaller smoke test instead of bringing back the old sample wholesale.
The new sample:
  • publishes a NativeAOT shared library,
  • lets Java load it with System.loadLibrary("Hello-NativeAOTFromJNI"),
  • initializes a sample-local JniRuntime from the existing JNIEnv*, and
  • calls a native C# sayHello() method that returns a Java string.
It does not exercise managed peer construction or generated JCWs; those can be added later with explicit support if we want a broader NativeAOT/JNI sample.
Validation
  • dotnet build -t:Prepare
  • dotnet build src/java-interop/java-interop.csproj
  • dotnet build src/Java.Interop/Java.Interop.csproj --no-restore
  • dotnet build tests/Java.Interop-Tests/Java.Interop-Tests.csproj --no-restore
  • dotnet test tests/Java.Interop-Tests/Java.Interop-Tests.csproj --no-build — 669 passed, 0 failed, 4 skipped
  • dotnet publish -c Release -r osx-arm64 samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj
  • dotnet build -c Release -r osx-arm64 -t:RunJavaSample samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj --no-restore
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June 8, 2026 10:23
@simonrozsival
Remove Java.Runtime.Environment runtime path
97ce2d3
Remove the standalone JRE runtime project and its sample/test consumers from the Java.Interop submodule. This keeps the core Java.Interop build path while dropping the desktop/JRE-oriented runtime pieces that are not needed by the main Android SDK.
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Pull request overview
This PR removes the standalone Java.Runtime.Environment project and its desktop/JRE-oriented test & sample consumers, and updates build/docs metadata to reflect the cleanup and discourage desktop-specific runtime helper usage at the Java.Interop layer.
Changes:
  • Removed src/Java.Runtime.Environment and all dependent test/sample projects that were built around a standalone desktop/JRE runtime.
  • Removed JVM-based test suites and performance/overhead benchmarks that depended on the removed runtime path.
  • Updated JniRuntime.GetAvailableInvocationPointers() obsolete guidance, the repo Makefile, and .github/copilot-instructions.md to align with the new shape.
Show a summary per file
FileDescription
tests/TestJVM/TestJVM.csprojRemoved TestJVM helper project (desktop/JRE runtime dependency).
tests/TestJVM/TestJVM.csRemoved TestJVM helper runtime implementation.
tests/Java.Interop.Dynamic-Tests/Java.Interop/JavaVMFixture.csRemoved Dynamic test fixture relying on TestJVM/JRE runtime.
tests/Java.Interop.Dynamic-Tests/Java.Interop/DynamicJavaInstanceTests.csRemoved Dynamic JVM-based test coverage.
tests/Java.Interop.Dynamic-Tests/Java.Interop/DynamicJavaClassTests.csRemoved Dynamic JVM-based test coverage.
tests/Java.Interop.Dynamic-Tests/Java.Interop.Dynamic-Tests.csprojRemoved Dynamic test project and its JRE runtime references.
tests/Java.Interop-Tests/java/net/dot/jni/test/TestType.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/SelfRegistration.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassDerived.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassBase2.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RenameClassBase1.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/RegisterNativesTestType.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/ObjectHelper.javaRemoved Java-side helper used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/MyJavaInterfaceImpl.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/JavaInterface.javaRemoved Java-side interface used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/GetThis.javaRemoved Java-side test type used by JVM-based tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/DesugarAndroidInterface$_CC.javaRemoved Java-side desugar test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CrossReferenceBridge.javaRemoved Java-side GC bridge/cross-ref test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallVirtualFromConstructorDerived.javaRemoved Java-side constructor-virtual-call test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallVirtualFromConstructorBase.javaRemoved Java-side constructor-virtual-call test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualDerived2.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualDerived.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/CallNonvirtualBase.javaRemoved Java-side nonvirtual dispatch test helper.
tests/Java.Interop-Tests/java/net/dot/jni/test/AnotherJavaInterfaceImpl.javaRemoved Java-side interface impl used by tests.
tests/Java.Interop-Tests/java/net/dot/jni/test/AndroidInterface.javaRemoved Java-side interface used for desugar-related tests.
tests/Java.Interop-Tests/Java.Interop/TestTypeTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/SelfRegistrationTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/SelfRegistration.csRemoved managed type used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/MethodBindingTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniValueMarshalerAttributeTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTypeSignatureTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTypeSignatureAttributeTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniTransitionTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntimeTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntime.JniValueManagerTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniRuntime.JniTypeManagerTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniReferenceSafeHandleTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniMarshalTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniInstanceMethodIDTest.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JniEnvironmentTests.csRemoved JVM-based unit tests.
tests/Java.Interop-Tests/Java.Interop/JavaVMFixture.Partial.csRemoved JVM fixture scaffolding.
tests/Java.Interop-Tests/Java.Interop/JavaVMFixture.csRemoved JVM fixture setup & type-manager mapping logic.
tests/Java.Interop-Tests/Java.Interop/JavaSingleArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaSByteArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaPrimitiveArrayContract.csRemoved JVM-based contract test base class.
tests/Java.Interop-Tests/Java.Interop/JavaPeerableExtensionsTests.csRemoved JVM-based extension tests and related managed bindings.
tests/Java.Interop-Tests/Java.Interop/JavaObjectExtensionsTests.csRemoved JVM-based extension tests.
tests/Java.Interop-Tests/Java.Interop/JavaObjectArrayTest.csRemoved JVM-based object array contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaManagedGCBridgeTests.csRemoved JVM-based GC bridge tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt64ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt32ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaInt16ArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaExceptionTests.csRemoved JVM-based exception interop tests.
tests/Java.Interop-Tests/Java.Interop/JavaDoubleArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaCharArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaBooleanArrayContractTests.csRemoved JVM-based contract tests.
tests/Java.Interop-Tests/Java.Interop/JavaArrayContract.csRemoved JVM-based contract test base class.
tests/Java.Interop-Tests/Java.Interop/InvokeVirtualFromConstructorTests.csRemoved JVM-based constructor dispatch tests.
tests/Java.Interop-Tests/Java.Interop/GetThis.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/FinalizerHelpers.csRemoved helper used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallVirtualFromConstructorDerived.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallVirtualFromConstructorBase.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualDerived2.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualDerived.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop/CallNonvirtualBase.csRemoved managed binding used by JVM-based tests.
tests/Java.Interop-Tests/Java.Interop-Tests.targetsRemoved MSBuild logic for building interop-test.jar and JCWs.
tests/Java.Interop-Tests/Java.Interop-Tests.csprojRemoved JVM-based Java.Interop test project.
tests/Java.Interop-Tests/Cadenza/BaseRocksFixture.csRemoved Cadenza test fixture that depended on JavaVMFixture.
tests/Java.Interop-Tests/Cadenza.Collections/ListContract.csRemoved Cadenza collection contract tests.
tests/Java.Interop-Tests/Cadenza.Collections/EnumerableContract.csRemoved Cadenza enumerable contract tests.
tests/Java.Interop-PerformanceTests/java/com/xamarin/interop/performance/JavaTiming.javaRemoved Java-side performance benchmark fixture.
tests/Java.Interop-PerformanceTests/Java.Interop/JavaVMFixture.csRemoved perf test fixture relying on TestJVM.
tests/Java.Interop-PerformanceTests/Java.Interop/JavaPrimitiveArraysTiming.csRemoved perf tests and benchmark helpers.
tests/Java.Interop-PerformanceTests/Java.Interop-PerformanceTests.targetsRemoved perf test JAR build target.
tests/Java.Interop-PerformanceTests/Java.Interop-PerformanceTests.csprojRemoved performance test project.
tests/Java.Base-Tests/java/net/dot/jni/test/PublicInterface.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/net/dot/jni/test/InterfaceMethodInheritance.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/net/dot/jni/test/HasInterfaceMethodInheritance.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/java/com/microsoft/java_base_tests/Invoker.javaRemoved Java.Base test Java inputs.
tests/Java.Base-Tests/Java.Base/NestedTypeTests.csRemoved Java.Base JVM-based tests.
tests/Java.Base-Tests/Java.Base/JniRuntimeJniValueManagerContractExtras.csRemoved Java.Base JVM-based tests.
tests/Java.Base-Tests/Java.Base/JavaVMFixture.Partial.csRemoved Java.Base test fixture scaffolding.
tests/Java.Base-Tests/Java.Base/JavaVMFixture.csRemoved Java.Base fixture setup using TestJVM.
tests/Java.Base-Tests/Java.Base/JavaToManagedTests.csRemoved Java→managed callback tests.
tests/Java.Base-Tests/Java.Base/InterfaceMethodInheritanceTests.csRemoved interface inheritance tests.
tests/Java.Base-Tests/Java.Base-Tests.targetsRemoved Java.Base test targets.
tests/Java.Base-Tests/Java.Base-Tests.csprojRemoved Java.Base test project.
tests/invocation-overhead/README.mdRemoved standalone invocation-overhead benchmark documentation.
tests/invocation-overhead/MakefileRemoved invocation-overhead build helpers.
tests/invocation-overhead/invocation-overhead.targetsRemoved invocation-overhead MSBuild targets.
tests/invocation-overhead/invocation-overhead.csprojRemoved invocation-overhead benchmark project.
src/Java.Runtime.Environment/Properties/AssemblyInfo.csRemoved standalone runtime assembly configuration.
src/Java.Runtime.Environment/Java.Runtime.Environment.targetsRemoved standalone runtime MSBuild logic.
src/Java.Runtime.Environment/Java.Runtime.Environment.dll.config.inRemoved template for dllmap config generation.
src/Java.Runtime.Environment/Java.Runtime.Environment.csprojRemoved standalone runtime project.
src/Java.Runtime.Environment/Java.Interop/JreTypeManager.csRemoved JRE-specific type manager implementation.
src/Java.Runtime.Environment/.gitignoreRemoved ignore entry for generated runtime config.
src/Java.Interop/Properties/AssemblyInfo.csRemoved InternalsVisibleTo entries for deleted assemblies/tests.
src/Java.Interop/Java.Interop/JniRuntime.csUpdated obsolete guidance to avoid referencing removed desktop runtime helpers.
samples/Hello-NativeAOTFromJNI/README.mdRemoved desktop/JRE-oriented sample docs.
samples/Hello-NativeAOTFromJNI/NativeAotTypeManager.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/ManagedType.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/JavaInteropRuntime.csRemoved NativeAOT-from-JNI sample code.
samples/Hello-NativeAOTFromJNI/JavaCallableAttributes.csRemoved sample-only callable attribute definitions.
samples/Hello-NativeAOTFromJNI/java/net/dot/jni/hello/JavaInteropRuntime.javaRemoved Java launcher/runtime sample code.
samples/Hello-NativeAOTFromJNI/java/net/dot/jni/hello/App.javaRemoved Java launcher sample code.
samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targetsRemoved sample build targets (JCW + jar).
samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csprojRemoved NativeAOT-from-JNI sample project.
samples/Hello-NativeAOTFromJNI/App.csRemoved sample native entrypoint code.
samples/Hello-NativeAOTFromAndroid/Transforms/Metadata.xmlRemoved Android NativeAOT sample transform metadata.
samples/Hello-NativeAOTFromAndroid/settings.gradleRemoved Android NativeAOT Gradle settings.
samples/Hello-NativeAOTFromAndroid/NativeAotTypeManager.csRemoved Android NativeAOT sample type manager.
samples/Hello-NativeAOTFromAndroid/MainActivity.csRemoved Android NativeAOT managed activity sample.
samples/Hello-NativeAOTFromAndroid/LogcatTextWriter.csRemoved Android NativeAOT logging helper.
samples/Hello-NativeAOTFromAndroid/JavaInteropRuntime.csRemoved Android NativeAOT runtime init code.
samples/Hello-NativeAOTFromAndroid/Hello-NativeAOTFromAndroid.csprojRemoved Android NativeAOT sample project.
samples/Hello-NativeAOTFromAndroid/gradle.propertiesRemoved Android NativeAOT sample config.
samples/Hello-NativeAOTFromAndroid/build.gradleRemoved Android NativeAOT sample build script.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/values/strings.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/layout/activity_main.xmlRemoved Android sample layout.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/drawable/ic_launcher_background.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/res/drawable-v24/ic_launcher_foreground.xmlRemoved Android sample resources.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/NativeAotRuntimeProvider.javaRemoved Android sample Java bootstrapping.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/JavaMainActivity.javaRemoved Android sample Java activity.
samples/Hello-NativeAOTFromAndroid/app/src/main/java/net/dot/jni/nativeaot/JavaInteropRuntime.javaRemoved Android sample Java runtime loader.
samples/Hello-NativeAOTFromAndroid/app/src/main/AndroidManifest.xmlRemoved Android sample manifest.
samples/Hello-NativeAOTFromAndroid/app/proguard-rules.proRemoved Android sample ProGuard rules.
samples/Hello-NativeAOTFromAndroid/app/build.gradleRemoved Android sample module build script.
samples/Hello-NativeAOTFromAndroid/app/.gitignoreRemoved Android sample ignores.
samples/Hello-NativeAOTFromAndroid/android.xmlRemoved Android sample API XML input.
samples/Hello-NativeAOTFromAndroid/.gitignoreRemoved Android sample ignores.
samples/Hello-Java.Base/Program.csRemoved desktop/JRE-oriented sample program.
samples/Hello-Java.Base/Hello-Java.Base.csprojRemoved desktop/JRE-oriented sample project.
samples/Hello-Core/README.mdRemoved desktop/JRE-oriented sample docs.
samples/Hello-Core/Program.csRemoved desktop/JRE-oriented sample program.
samples/Hello-Core/Hello-Core.csprojRemoved desktop/JRE-oriented sample project.
MakefileUpdated build metadata, but currently still references removed test outputs (needs further adjustment).
.github/copilot-instructions.mdUpdated repository guidance to reflect removed runtime/tests and updated validation commands.
Copilot's findings
  • Files reviewed: 162/178 changed files
  • Comments generated: 1
Comment threadMakefile
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@simonrozsival
simonrozsivalforce-pushed
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58ec716CompareJune 8, 2026 10:33
@simonrozsival
Fix Makefile test targets after JRE cleanup
a18c60f
Update the Makefile test lists to match the remaining managed test projects and stop building removed desktop/JRE test outputs.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@simonrozsival
simonrozsival
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Jun 8, 2026

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@copilot there seem to be many failing tests, so the PR is still not in good shape:
...
Failed GeneratedOK [48 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.StaticMethods.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/StaticMethods.cs:line 12
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
Failed GeneratedOK [44 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.StaticProperties.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/StaticProperties.cs:line 12
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
Failed GeneratedOK [61 ms]
Error Message:
System.IO.FileNotFoundException : Could not find file '/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.dll'.
Stack Trace:
at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.StandardFileSystem.OpenFile(String filePath, FileMode mode, FileAccess access, FileShare share)
at Roslyn.Utilities.CommonCompilerFileSystemExtensions.OpenFileWithNormalizedException(ICommonCompilerFileSystem fileSystem, String filePath, FileMode fileMode, FileAccess fileAccess, FileShare fileShare)
at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)
at generatortests.Compiler.<>c.<Compile>b__2_2(String p) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at System.Linq.Enumerable.ArraySelectIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
at System.Linq.Enumerable.ArraySelectIterator`2.ToArray()
at generatortests.Compiler.Compile(CodeGeneratorOptions options, String assemblyFileName, IEnumerable`1 AdditionalSourceDirectories, Boolean& hasErrors, String& output, Boolean allowWarnings) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Compiler.cs:line 71
at generatortests.BaseGeneratorTest.Execute() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 46
at generatortests.BaseGeneratorTest.Run(CodeGenerationTarget target, String outputPath, String apiDescriptionFile, String expectedPath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 169
at generatortests.BaseGeneratorTest.RunAllTargets(String outputRelativePath, String apiDescriptionFile, String expectedRelativePath, String[] additionalSupportPaths, String enumFieldsMapFile, String enumMethodMapFile, String metadataFile) in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/BaseGeneratorTest.cs:line 126
at generatortests.Streams.GeneratedOK() in /Users/runner/work/1/s/tests/generator-Tests/Integration-Tests/Streams.cs:line 12

CopilotAIand others
added 2 commits
June 8, 2026 12:09
@simonrozsival
Plan investigation for failing generator tests
ff097ff
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Fix generator-Tests Java.Interop dependency
6fb38a7
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
CopilotAI
commented
Jun 8, 2026

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@copilot there seem to be many failing tests, so the PR is still not in good shape:
...

...
Fixed in 6fb38a7. I added an explicit ProjectReference to src/Java.Interop/Java.Interop.csproj in tests/generator-Tests/generator-Tests.csproj, so Java.Interop.dll is now copied into bin/Test*-net10.0 for the integration compiler references. I also restored src/Java.Base-ref.cs to the pre-plan state to remove the accidental unrelated delta.
@simonrozsival
simonrozsival
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Jun 8, 2026

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@copilot CI is failing, try to fix it:
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
/Users/runner/hostedtoolcache/dotnet/dotnet test --logger trx;LogFileName=Java.Interop.Dynamic-Tests.trx --results-directory /Users/runner/work/_temp bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll" provided was not found.
##[error]Error: The process '/Users/runner/hostedtoolcache/dotnet/dotnet' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
##[warning]RetryHelper encountered task failure, will retry (attempt #: 1 out of 1) after 1000 ms
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
/Users/runner/hostedtoolcache/dotnet/dotnet test --logger trx;LogFileName=Java.Interop.Dynamic-Tests.trx --results-directory /Users/runner/work/_temp bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "/Users/runner/work/1/s/bin/TestRelease-net10.0/Java.Interop.Dynamic-Tests.dll" provided was not found.
##[error]Error: The process '/Users/runner/hostedtoolcache/dotnet/dotnet' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
Finishing: Tests: Java.Interop.Dynamic (.NET - MacOS)

or
The test source file "D:\a\1\s\bin/TestRelease-net10.0/Java.Interop-Tests.dll" provided was not found.
##[error]Error: The process 'C:\hostedtoolcache\windows\dotnet\dotnet.exe' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
##[warning]RetryHelper encountered task failure, will retry (attempt #: 1 out of 1) after 1000 ms
C:\Windows\system32\chcp.com 65001
Active code page: 65001
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
C:\hostedtoolcache\windows\dotnet\dotnet.exe test --logger trx;LogFileName=Java.Interop-Tests.trx --results-directory D:\a\_temp bin/TestRelease-net10.0/Java.Interop-Tests.dll
VSTest version 18.0.1 (x64)
The test source file "D:\a\1\s\bin/TestRelease-net10.0/Java.Interop-Tests.dll" provided was not found.
##[error]Error: The process 'C:\hostedtoolcache\windows\dotnet\dotnet.exe' failed with exit code 1
##[warning].NET 5 has some compatibility issues with older Nuget versions(<=5.7), so if you are using an older Nuget version(and not dotnet cli) to restore, then the dotnet cli commands (e.g. dotnet build) which rely on such restored packages might fail. To mitigate such error, you can either: (1) - Use dotnet cli to restore, (2) - Use Nuget version 5.8 to restore, (3) - Use global.json using an older sdk version(<=3) to build
Info: Azure Pipelines hosted agents have been updated and now contain .Net 5.x SDK/Runtime along with the older .Net Core version which are currently lts. Unless you have locked down a SDK version for your project(s), 5.x SDK might be picked up which might have breaking behavior as compared to previous versions. You can learn more about the breaking changes here: https://docs.microsoft.com/en-us/dotnet/core/tools/ and https://docs.microsoft.com/en-us/dotnet/core/compatibility/ . To learn about more such changes and troubleshoot, refer here: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/dotnet-core-cli?view=azure-devops#troubleshooting
##[error]Dotnet command failed with non-zero exit code on the following projects : [ '' ]
Finishing: Tests: Java.Interop (net10.0 - .NET - Windows)

CopilotAIand others
added 2 commits
June 8, 2026 13:39
@simonrozsival
Plan CI failure investigation
be4124f
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
@simonrozsival
Remove deleted test assemblies from core CI template
c39003a
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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Jun 8, 2026

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@copilot CI is failing, try to fix it:
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted...

Fixed in c39003a. I removed the stale run-dotnet-test entries for deleted assemblies (Java.Interop-Tests, Java.Interop.Dynamic-Tests, Java.Interop-PerformanceTests, and Java.Base-Tests) from build-tools/automation/templates/core-tests.yaml, so CI no longer tries to run missing DLLs from bin/TestRelease-net10.0.
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Jun 8, 2026

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@copilot explain why we needed to remove these tests. Does it mean that without the full Java.Runtime.Environment, we can't run Java.Interop tests outside of dotnet/android?
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@copilot explain why we needed to remove these tests. Does it mean that without the full Java.Runtime.Environment, we can't run Java.Interop tests outside of dotnet/android?
Those tests were removed because they depended on the standalone Java.Runtime.Environment host that this PR deletes. Once that runtime path was removed, those assemblies were no longer produced, so keeping their CI entries only caused false red failures.
It does not mean Java.Interop as a whole can only be used with dotnet/android. It means this repo no longer carries the old desktop/JRE-specific runtime host+test harness. The removed test projects specifically exercised that host. To run equivalent runtime tests outside dotnet/android again, we’d need to add and maintain a new supported non-Android host path.
jonathanpeppers
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Jun 8, 2026
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Comment threadexternal/xamarin-android-tools
@jonathanpeppers
Revert unintended xamarin-android-tools submodule change
630522e
Co-authored-by: jonathanpeppers <840039+jonathanpeppers@users.noreply.github.com>
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requested a review
from jonathanpeppersJune 8, 2026 16:37
@simonrozsival
Restore Java.Interop tests without JRE runtime
4e2297d
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@simonrozsivalsimonrozsival
changed the title
Remove standalone Java.Runtime.Environment runtime pathRemove Java.Runtime.Environment and keep Java.Interop tests runningJun 9, 2026
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added 2 commits
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Merge remote-tracking branch 'origin/main' into remove-java-runtime-e…
a003dcd
…nvironment
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@simonrozsival
Implement new abstract JniValueManager members in Hello-NativeAOTFrom…
ed27671
…JNI sample
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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Jun 22, 2026

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@copilot update the branch with latest changes from main and fix these build errors:
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoLogo -NoProfile -NonInteractive -ExecutionPoli...

Updated the branch with latest origin/main (clean merge) and fixed the build errors in 81dc (latest commit).
The trimmable-type-map work made several JniRuntime.JniValueManager members abstract (CreatePeer, CreateValueCore, GetValueCore, GetValueMarshalerCore, CreateLocalObjectReferenceArgumentCore, ActivatePeer, ConstructPeerCore). Since this smoke sample never constructs managed peers (it only returns a Java string via raw JNI), I implemented those members in the sample's ValueManager as AOT-safe NotSupportedException stubs rather than reintroducing the reflection-based manager.
Validated:
  • dotnet build samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj -c Release — 0 warnings
  • dotnet publish -r linux-x64 — NativeAOT codegen completes with no IL trim/AOT warnings
  • dotnet test tests/Java.Interop-Tests — 671 passed, 0 failed, 4 skipped
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Jun 22, 2026

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@copilot fix failing build:
/usr/local/bin/pwsh -NoLogo -NoProfile -NonInteractive -Command . '/Users/runner/work/_temp/c200f9fa-3322-4cf3-8650-5b7159d65d36.ps1'
Determining projects to restore...
Restored /Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj (in 311 ms).
2 of 3 projects are up-to-date for restore.
Hello from Java!
JavaInteropRuntime.init : error : System.NotSupportedException: Please set CreationOptions.TypeManager! [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
at Java.Interop.JniRuntime..ctor(JniRuntime.CreationOptions) + 0x51e
at libHello-NativeAOTFromJNI!<BaseAddress>+0x78a8c
Unhandled exception. System.NotSupportedException: No available Java runtime to attach to. Please create one.
at Java.Interop.JniRuntime.get_CurrentRuntime() + 0x173
at Java.Interop.JniEnvironmentInfo..ctor() + 0x10
at Java.Interop.JniEnvironment.<>c.<.cctor>b__38_0() + 0x18
at System.Threading.ThreadLocal`1.GetValueSlow() + 0x25
at libHello-NativeAOTFromJNI!<BaseAddress>+0x786d1
/var/folders/d_/7cp7f2xj0m5gcp7ch5j2t7tc0000gn/T/MSBuildTemp/tmpdac8ca75ed214639b541fa75d6ccaa52.exec.cmd: line 2: 9273 Abort trap: 6 "/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App
/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targets(49,5): error MSB3073: The command ""/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App" exited with code 134. [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
Build FAILED.
JavaInteropRuntime.init : error : System.NotSupportedException: Please set CreationOptions.TypeManager! [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.targets(49,5): error MSB3073: The command ""/Users/runner/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.19-10/x64/Contents/Home/bin/java" -classpath "hello-from-java.jar:java-interop.jar" net/dot/jni/hello/App" exited with code 134. [/Users/runner/work/1/s/samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj]
0 Warning(s)
2 Error(s)
Time Elapsed 00:00:01.68

@simonrozsival
Set CreationOptions.TypeManager in Hello-NativeAOTFromJNI sample runtime
d70097e
Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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Jun 22, 2026

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@copilot fix failing build:
/usr/local/bin/pwsh -NoLogo -NoProfile -NonInteractive -Command . '/Users/runner/work/_temp/c200f9fa-3322-4cf3-8650-5b7159d65d36.ps1'

...
Fixed in the latest commit. The sample's ExistingJniRuntime wasn't setting CreationOptions.TypeManager, so JniRuntime's constructor threw NotSupportedException: Please set CreationOptions.TypeManager!. I added TypeManager = new JniRuntime.JniTypeManager () to the CreationOptions (the base JniTypeManager is concrete and AOT-safe — its virtuals return empty, which is sufficient since this smoke sample only returns a Java string via raw JNI and never resolves managed types).
Validated end-to-end on linux-x64: NativeAOT publish + running net/dot/jni/hello/App now prints:
Hello from Java!
Hello from .NET NativeAOT!
String returned to Java: Hello from .NET NativeAOT!

The runtime initializes with no exception.
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Jun 23, 2026

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@copilot fix the following build error:
CSC : error CS1566: Error reading resource 'Xamarin.Android.Tools.BytecodeTests.kotlin-gradle.Widgets.class' -- 'Could not find a part of the path '/Users/runner/work/1/s/tests/Xamarin.Android.Tools.Bytecode-Tests/kotlin-gradle/classes/xat/bytecode/tests/Widgets.class'.' [/Users/runner/work/1/s/tests/Xamarin.Android.Tools.Bytecode-Tests/Xamarin.Android.Tools.Bytecode-Tests.csproj]
0 Warning(s)
1 Error(s)

@simonrozsival
Isolate Kotlin Gradle test outputs per project
697b961
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Jun 23, 2026

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@copilot fix the following build error:
...
Fixed in 697b961. The Kotlin/Gradle fixture classes are now generated into each consuming test project's obj/ directory instead of a shared source-tree kotlin-gradle/classes directory, so parallel solution builds no longer race over the embedded Widgets.class resource.
Validated with dotnet build Java.Interop.sln -c Release from clean Kotlin outputs, plus Release builds/tests for Xamarin.Android.Tools.Bytecode-Tests and generator-Tests.
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🤖 Code Review — ✅ LGTM (with minor suggestions)
This is a clean, well-executed removal of the Java.Runtime.Environment project. The test-host runtime plumbing it provided (value/object-reference managers, JVM creation) is faithfully re-homed into tests/TestJVM/TestJVM.cs, the NativeAOT sample is made self-contained, and the native build is reworked to a static validation lib. CI is green (build + full Java.Interop test suite pass).
I diffed the ported ManagedValueManager / ManagedObjectReferenceManager against the deleted originals and verified:
  • gref/wgref counting is correct (incrementing on a valid result, decrementing on a valid input ref is the right asymmetry);
  • CreateJVM resource handling is sound — Dispose is idempotent, so the LoadJvmLibrary-throws path doesn't double-free;
  • the JavaVMInitArgs / JavaVMOption struct layouts (blittable, sequential) and the JNI_CreateJavaVMdelegate* unmanaged<...> signature match the JNI ABI.
I also confirmed there are no dangling references to the removed projects in the solution, Makefile, CI templates, or Sdk.targets, and that Hello-NativeAOTFromJNI (kept) is still exercised via the dedicated dotnet publish CI step rather than the solution.
Findings (non-blocking)
  • 💡 Documentation — tests/TestJVM/TestJVM.cs:478: the "why" comment about the Local-ref / SafeHandle.ReferenceType thread-locality invariant was dropped during the port.
  • 💡 MSBuild — samples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj:41: hardcoded MacOSX15.sdk path will silently stop applying on future SDKs.
Nice touches
  • JniRuntimeJniValueManagerContract now binds the generic <ManagedValueManager> instead of Type.GetType("...Java.Runtime.Environment...") reflection — trimmer/AOT-friendly.
  • src/java-interop/CMakeLists.txt fixes a pre-existing foreach(dir in ${...}) syntax bug.
  • Makefilerun-net-tests gains the missing ; so every test assembly in the loop actually runs.
Verdict: ✅ LGTM — 0 ❌ · 0 ⚠️ · 2 💡. The two suggestions are optional and don't block merge.
Generated by Java.Interop PR Reviewer for issue #1447 · 2.5K AIC · ⌖ 46.9 AIC · ⊞ 34.6K
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Comment threadtests/TestJVM/TestJVM.cs
Comment threadsamples/Hello-NativeAOTFromJNI/Hello-NativeAOTFromJNI.csproj
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@jonathanpeppers
Merge origin/main and address review feedback
eea9765
- Resolve merge conflicts with main by keeping deletions of:
- samples/Hello-NativeAOTFromAndroid/NativeAotTypeManager.cs
- samples/Hello-NativeAOTFromJNI/NativeAotTypeManager.cs
- src/Java.Runtime.Environment/Java.Interop/JreTypeManager.cs
- Address review comments from PR 1447:
- Restore the "why" comment on ManagedValueManager.FinalizePeer
explaining why we use JniObjectReference.Type instead of
SafeHandle.ReferenceType (the latter is thread-local and returns
Invalid off-thread for Local refs).
- Replace the hard-coded MacOSX15.sdk -isysroot path in
Hello-NativeAOTFromJNI.csproj with a target that resolves the
macOS SDK dynamically via `xcrun --show-sdk-path`, so it keeps
working on newer SDKs and on machines with full Xcode installed.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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🤖 Code Review — Remove Java.Runtime.Environment, keep Java.Interop tests running
Verdict: ✅ Looks good — minor suggestions only (posting as a COMMENT, not an approval).
This is a careful, well-scoped refactor. I read the full tests/TestJVM/TestJVM.cs and diffed the new value/reference managers against the deleted Java.Runtime.Environment originals — the port is faithful. Things I independently verified:
  • ✅ The new CreateJVM / NativeLibraryJvmLibraryHandler JVM-bootstrap path is correct: the JNI_CreateJavaVM function-pointer signature (out IntPtr, out IntPtr, ref JavaVMInitArgs) maps to JavaVM** / void** / void*; marshaled option strings are freed in finally; and the library handle is disposed on every failure path (no double-dispose, LibraryHandler nulled on error).
  • ✅ JavaVMInitArgs.version is a 4-byte int-backed JniVersion enum, matching jint; struct field order matches the JNI layout.
  • ✅ JDK_OnlySupportsOneVM expects NotSupportedException, which CreateJVM throws on r != 0; the InvocationPointer-only path correctly short-circuits before creating a second VM.
  • ✅ Swapping Type.GetType ("..., Java.Runtime.Environment", throwOnError) for JniRuntimeJniValueManagerContract<ManagedValueManager> removes a reflection/trimming hazard — a nice trimmer/AOT win, and it justifies making ManagedValueManager public.
  • ✅ App.cs's sayHello uses JniTransition with proper try/catch/finally; JavaInteropRuntime.init intentionally avoids JniTransition (the runtime isn't initialized yet) and logs instead — both correct.
  • ✅ Remaining product-code edits (obsolete message text, InternalsVisibleTo removal, generator/JniPeerMembers comment cleanup, CMake/targets/Makefile/sln updates) are pure cleanup of references to the deleted assembly.
Issue counts: 0 ❌ · 0 ⚠️ · 2 💡 (both inline, non-blocking)
⚠️ CI not yet green: at review time only license/cla has completed — the dotnet.java-interop Azure build is still queued, so I can't independently confirm the build/tests pass. The PR description reports 669 passed, 0 failed, 4 skipped locally; please make sure the Azure build goes green before merging.
Note on scope: this PR intentionally removes Java.Base / Java.Runtime.Environment, the samples, and the performance/dynamic test suites, so that coverage goes away by design — the retained Java.Interop-Tests still exercise the core runtime through the rehosted TestJVM.
Thanks for the detailed description and the explicit "kept vs. removed" breakdown — it made reviewing 39k deleted lines tractable. Two small 💡 suggestions inline; nothing blocking.
Generated by Java.Interop PR Reviewer for issue #1447 · 1.7K AIC · ⌖ 49.6 AIC · ⊞ 34.6K
Comment /review to run again
Comment threadtests/TestJVM/TestJVM.cs
Comment threadtests/TestJVM/TestJVM.cs
jonathanpeppersand others
added 2 commits
June 26, 2026 08:12
@jonathanpeppers
Fix invalid -- in XML comment in Hello-NativeAOTFromJNI.csproj
aed3c97
XML comments cannot contain --, which broke MSBuild parsing of the
csproj on CI. Reword the comment to drop the literal --show-sdk-path`nflag reference so the project loads again.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppers
Sync Hello-NativeAOTFromJNI ValueManager DAM attributes with base
54ef878
PR #1481 (merged into main after this PR opened) removed some
[DynamicallyAccessedMembers] attributes from the base
JniRuntime.JniValueManager abstract methods. After merging main,
the sample's overrides still had the old DAM attributes, producing
IL2092/IL2095 'overridden members must have the same
DynamicallyAccessedMembersAttribute usage' errors when publishing
for NativeAOT.
Drop DAM from the sample overrides to match the new base signatures:
- ActivatePeer (Type type, ...)
- GetValueMarshalerCore<T> ()
- CreateLocalObjectReferenceArgumentCore (Type type, ...)
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppers
jonathanpeppers
merged commit 4e14244
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mainJun 26, 2026

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remove-java-runtime-environment

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June 26, 2026 15:19
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Jun 30, 2026
@jonathanpeppers
Remove Java.Runtime.Environment project from solution
871a945
The Java.Runtime.Environment project was removed upstream in dotnet/java-interop#1447 (commit 4e142449), so the reference in Xamarin.Android.sln no longer resolves and breaks restore.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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@dependabot@jonathanpeppers
Bump todotnet/java-interop@6ec1345(#11782)
ad3f04b
### Bump external/Java.Interop from `8d54473` to `6ec1345`
Bumps [external/Java.Interop](https://github.com/dotnet/java-interop) from `8d54473` to `6ec1345`.
- [Commits](dotnet/java-interop@8d54473...6ec1345)
---
updated-dependencies:
- dependency-name: external/Java.Interop
dependency-version: 6ec1345165fa7385c935f16ccaa8cc38be50a080
dependency-type: direct:production
...
### Remove Java.Runtime.Environment project from solution
The Java.Runtime.Environment project was removed upstream in dotnet/java-interop#1447 (commit 4e142449), so the reference in Xamarin.Android.sln no longer resolves and breaks restore.
### Suppress new IL3050 warnings in ManagedTypeManager
Upstream dotnet/java-interop#1474 added [RequiresDynamicCode] to:
- JniRuntime.ReflectionJniTypeManager (the class), surfacing IL3050 at ManagedTypeManager..ctor() since we derive from it.
- JniEnvironment.Types.RegisterNatives(.., JniNativeMethodRegistration[], int), surfacing IL3050 at ManagedTypeManager.RegisterNativeMembers.
Suppress for now; the JniNativeMethodRegistration[] registration path will be migrated to the blittable RegisterNatives(JniObjectReference, ReadOnlySpan<JniNativeMethod>) overload in a future change.
Co-authored-by: Jonathan Peppers <jonathan.peppers@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jonathanpeppersjonathanpeppers
mentioned this pull request
Jul 6, 2026
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