Remove Java.Runtime.Environment and keep Java.Interop tests running by simonrozsival · Pull Request #1447 · dotnet/java-interop

simonrozsival · 2026-06-08T10:23:24Z

Related to #1448

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 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.

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.

Validation

dotnet build tests/Java.Interop-Tests/Java.Interop-Tests.csproj
dotnet test tests/Java.Interop-Tests/Java.Interop-Tests.csproj --no-build — 669 passed, 0 failed, 4 skipped

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.

Copilot

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

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

Copilot's findings

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

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 · 2026-06-08T12:05:58Z

@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

Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>

Copilot · 2026-06-08T12:14:58Z

@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 · 2026-06-08T13:35:35Z

@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)

Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>

Copilot · 2026-06-08T13:46:21Z

@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 · 2026-06-08T13:53:03Z

@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?

Copilot · 2026-06-08T13:56:38Z

@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 · 2026-06-08T16:30:20Z

@copilot can you undo this change

Done in 630522e — I reverted external/xamarin-android-tools back to 5165523537a371ad2717ede40f8d7b5b5bfc4a64 (undoing the submodule pointer change).

Co-authored-by: jonathanpeppers <840039+jonathanpeppers@users.noreply.github.com>

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

simonrozsival · 2026-06-09T10:18:46Z

@copilot resolve the merge conflicts in this pull request

Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>

Copilot · 2026-06-09T10:26:38Z

@copilot resolve the merge conflicts in this pull request

Resolved in 38b6d46. I merged origin/main, fixed the conflicts by keeping the intended deletions from this PR (including tests/invocation-overhead/*), and validated with dotnet build + dotnet test for tests/Java.Interop-Tests.

simonrozsival · 2026-06-09T10:46:03Z

/review

github-actions · 2026-06-09T10:46:41Z

✅ Java.Interop PR Reviewer completed successfully!

github-actions

Review Summary

⚠️ Needs Changes — 0 errors, 1 warning, 2 suggestions

What this PR does

Removes the standalone Java.Runtime.Environment project and all its dependents (samples, performance tests, dynamic tests, Java.Base tests). Replaces the JreRuntime/JreRuntimeOptions dependency in TestJVM with direct JniRuntime hosting, inlining the necessary plumbing (JVM loading via NativeLibrary, ManagedValueManager, ManagedObjectReferenceManager, TestJvmTypeManager). A large cleanup that removes ~25K lines.

Positive callouts

Clean port of ManagedValueManager / ManagedObjectReferenceManager from the old product code — simplified appropriately for test-only use (no log writers, no Mono-specific paths).
Proper try/finally for Marshal.StringToHGlobalAnsi cleanup in CreateJVM.
Thread-safe reference counting via Interlocked operations.
Good use of #nullable enable and removal of the null-forgiving operator.
The NativeLibraryJvmLibraryHandler is simpler and more straightforward than the old abstract JvmLibraryHandler factory hierarchy.

Concern

The main concern is that Java.Interop-Tests (669 tests) are removed from CI while being kept in the solution. These tests cover the core JNI runtime, value marshaling, object references, and type management — all of which are critical to the library. If this is a temporary state pending follow-up work (e.g., #1448), please document that clearly.

Issue counts

Severity	Count
⚠️ Warning	1 — Java.Interop-Tests removed from CI
💡 Suggestion	2 — Unused `getCreated` field; removed `[NonParallelizable]`

Generated by Java.Interop PR Reviewer for issue #1447 · ● 15.8M

github-actions · 2026-06-09T10:55:42Z

@@ -55,35 +55,6 @@ steps:
    testRunTitle: Java.Interop.Tools.Maven (${{ parameters.platformName }})
    testAssemblyName: Java.Interop.Tools.Maven-Tests



🤖 ⚠️ Testing — Java.Interop-Tests was removed from CI but kept in the solution.

The PR description says "Keep Java.Interop-Tests in the solution and restore them to a passing state without bringing back the Java.Runtime.Environment assembly" — but this CI pipeline change means those 669 tests won't run on PRs anymore. Regressions in the core Java.Interop library (JNI runtime, value marshaling, object references, etc.) would go undetected until someone runs them manually.

Is this removal intentional as part of a larger plan to re-add them in a separate PR (e.g., the related #1448)? If so, please note that in the PR description. If not, consider keeping the Java.Interop-Tests entry in CI — the test project no longer depends on Java.Runtime.Environment.

Rule: Tests kept in the solution should remain in CI

github-actions · 2026-06-09T10:55:42Z

@@ -10,9 +9,6 @@

 namespace Java.InteropTests
 {


🤖 💡 Testing — The [NonParallelizable] attribute was removed from JniRuntimeTest.

This class contains JDK_OnlySupportsOneVM (which attempts to create a second JVM) and JniRuntime_WithExistingVM_CanBeDisposed (which creates a second JniRuntime on a separate thread). Both interact with global JVM singleton state. Was the removal intentional? If these tests ever run in parallel with other JVM-dependent tests, the global state interactions could cause flaky failures.

Rule: NUnit conventions — NonParallelizable for tests that interact with shared state

github-actions · 2026-06-09T10:55:42Z

+
+		IntPtr  handle;
+		IntPtr  create;
+		IntPtr  getCreated;


🤖 💡 Code organization — getCreated is loaded but never used.

The JNI_GetCreatedJavaVMs export is verified during LoadJvmLibrary (failing the load if it's missing), but the getCreated function pointer is never called anywhere. If the intent is just to validate the library exports the expected symbols, consider checking the export without storing the result, or add a comment explaining why this is retained for future use.

Rule: Remove unused code

Copilot AI review requested due to automatic review settings June 8, 2026 10:23

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Comment thread Makefile Outdated

Delete obsolete JRE sample and test projects

58ec716

simonrozsival force-pushed the remove-java-runtime-environment branch from 1723d75 to 58ec716 Compare June 8, 2026 10:33

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>

Copilot started work on behalf of simonrozsival June 8, 2026 12:06 View session

Copilot AI and others added 2 commits June 8, 2026 12:09

Plan investigation for failing generator tests

ff097ff

Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>

Fix generator-Tests Java.Interop dependency

6fb38a7

Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>

Copilot finished work on behalf of simonrozsival June 8, 2026 12:15

Copilot started work on behalf of simonrozsival June 8, 2026 13:35 View session

Copilot AI and others added 2 commits June 8, 2026 13:39

Plan CI failure investigation

be4124f

Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>

Remove deleted test assemblies from core CI template

c39003a

Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>

Copilot finished work on behalf of simonrozsival June 8, 2026 13:46

Copilot started work on behalf of simonrozsival June 8, 2026 13:53 View session

Copilot finished work on behalf of simonrozsival June 8, 2026 13:56

jonathanpeppers reviewed Jun 8, 2026

View reviewed changes

Copilot started work on behalf of jonathanpeppers June 8, 2026 16:30 View session

Revert unintended xamarin-android-tools submodule change

630522e

Co-authored-by: jonathanpeppers <840039+jonathanpeppers@users.noreply.github.com>

Copilot finished work on behalf of jonathanpeppers June 8, 2026 16:37

Copilot AI requested a review from jonathanpeppers June 8, 2026 16:37

Restore Java.Interop tests without JRE runtime

4e2297d

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

simonrozsival changed the title ~~Remove standalone Java.Runtime.Environment runtime path~~ Remove Java.Runtime.Environment and keep Java.Interop tests running Jun 9, 2026

Copilot started work on behalf of simonrozsival June 9, 2026 10:18 View session

Merge origin/main and resolve conflicts

38b6d46

Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>

Copilot finished work on behalf of simonrozsival June 9, 2026 10:27

github-actions Bot reviewed Jun 9, 2026

View reviewed changes

		@@ -55,35 +55,6 @@ steps:
		testRunTitle: Java.Interop.Tools.Maven (${{ parameters.platformName }})
		testAssemblyName: Java.Interop.Tools.Maven-Tests

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simonrozsival commented Jun 8, 2026 •

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