Graal: Failure when using kotlin-reflect with native images

Created on 31 Mar 2020 · 3Comments · Source: oracle/graal

Describe the issue
It seems non trivial to make Kotlin reflection working with GraalVM native images, and this is an problem for Spring Boot applications. I have isolated the first blocking point I hit with a focused repro using only kotlin-reflect.jar with both runtime and build time variants since the errors are different.

Steps to reproduce the issue

git clone https://github.com/sdeleuze/graal-issues.git
cd graal-issues/kotlin-reflect
./build.sh

More details

With this Java code that invoke Kotlin reflection API:

// Make sure that @Metadata from KotlinVersion is included in the native-image (not sure if there is a better way)
Class<?> annotation = KotlinVersion.class.getAnnotation(Metadata.class).annotationType();
System.out.println(annotation);

Method method = KotlinVersion.class.getMethods()[0];
KFunction<?> function = ReflectJvmMapping.getKotlinFunction(method);
System.out.println(function);

We get the following output for the 3 variants:

In regular JVM
interface kotlin.Metadata
fun kotlin.KotlinVersion.isAtLeast(kotlin.Int, kotlin.Int, kotlin.Int): kotlin.Boolean

As GraalVM native image with runtime initialization by default
interface kotlin.Metadata
Exception in thread "main" kotlin.jvm.KotlinReflectionNotSupportedError: Kotlin reflection implementation is not found at runtime. Make sure you have kotlin-reflect.jar in the classpath
    at kotlin.jvm.internal.ClassReference.error(ClassReference.kt:80)
    at kotlin.jvm.internal.ClassReference.getMembers(ClassReference.kt:18)
    at kotlin.reflect.full.KClasses.getFunctions(KClasses.kt:90)
    at kotlin.reflect.jvm.ReflectJvmMapping.getKotlinFunction(ReflectJvmMapping.kt:134)
    at com.sample.App.main(App.java:16)

As GraalVM native image with build time initialization by default
interface kotlin.Metadata
Exception in thread "main" java.lang.IllegalStateException: @NotNull method kotlin/reflect/jvm/internal/impl/builtins/KotlinBuiltIns.getBuiltInClassByFqName must not return null
    at kotlin.reflect.jvm.internal.impl.builtins.KotlinBuiltIns.$$$reportNull$$$0(KotlinBuiltIns.java)
    at kotlin.reflect.jvm.internal.impl.builtins.KotlinBuiltIns.getBuiltInClassByFqName(KotlinBuiltIns.java:357)
    at kotlin.reflect.jvm.internal.impl.builtins.jvm.JavaToKotlinClassMap.mapJavaToKotlin(JavaToKotlinClassMap.kt:130)
    at kotlin.reflect.jvm.internal.impl.builtins.jvm.JavaToKotlinClassMap.mapJavaToKotlin$default(JavaToKotlinClassMap.kt:126)
    at kotlin.reflect.jvm.internal.impl.load.java.lazy.types.JavaTypeResolver.mapKotlinClass(JavaTypeResolver.kt:161)
    at kotlin.reflect.jvm.internal.impl.load.java.lazy.types.JavaTypeResolver.computeTypeConstructor(JavaTypeResolver.kt:135)
    at kotlin.reflect.jvm.internal.impl.load.java.lazy.types.JavaTypeResolver.computeSimpleJavaClassifierType(JavaTypeResolver.kt:117)
    at kotlin.reflect.jvm.internal.impl.load.java.lazy.types.JavaTypeResolver.transformJavaClassifierType(JavaTypeResolver.kt:93)
    at kotlin.reflect.jvm.internal.impl.load.java.lazy.types.JavaTypeResolver.transformJavaType(JavaTypeResolver.kt:52)
    at kotlin.reflect.jvm.internal.impl.load.java.lazy.descriptors.LazyJavaClassDescriptor$LazyJavaClassTypeConstructor.computeSupertypes(LazyJavaClassDescriptor.kt:191)
    at kotlin.reflect.jvm.internal.impl.types.AbstractTypeConstructor$supertypes$1.invoke(AbstractTypeConstructor.kt:80)
    at kotlin.reflect.jvm.internal.impl.types.AbstractTypeConstructor$supertypes$1.invoke(AbstractTypeConstructor.kt:26)
    at kotlin.reflect.jvm.internal.impl.storage.LockBasedStorageManager$LockBasedLazyValue.invoke(LockBasedStorageManager.java:355)
    at kotlin.reflect.jvm.internal.impl.storage.LockBasedStorageManager$LockBasedLazyValueWithPostCompute.invoke(LockBasedStorageManager.java:428)
    at kotlin.reflect.jvm.internal.impl.storage.LockBasedStorageManager$LockBasedNotNullLazyValueWithPostCompute.invoke(LockBasedStorageManager.java:459)
    at kotlin.reflect.jvm.internal.impl.types.AbstractTypeConstructor.getSupertypes(AbstractTypeConstructor.kt:27)
    at kotlin.reflect.jvm.internal.impl.types.AbstractTypeConstructor.getSupertypes(AbstractTypeConstructor.kt:26)
    at kotlin.reflect.jvm.internal.impl.load.java.lazy.descriptors.LazyJavaClassMemberScope.computeFunctionNames(LazyJavaClassMemberScope.kt:78)
    at kotlin.reflect.jvm.internal.impl.load.java.lazy.descriptors.LazyJavaClassMemberScope.computeFunctionNames(LazyJavaClassMemberScope.kt:67)
    at kotlin.reflect.jvm.internal.impl.load.java.lazy.descriptors.LazyJavaScope.computeDescriptors(LazyJavaScope.kt:361)
    at kotlin.reflect.jvm.internal.impl.load.java.lazy.descriptors.LazyJavaScope$allDescriptors$1.invoke(LazyJavaScope.kt:68)
    at kotlin.reflect.jvm.internal.impl.load.java.lazy.descriptors.LazyJavaScope$allDescriptors$1.invoke(LazyJavaScope.kt:59)
    at kotlin.reflect.jvm.internal.impl.storage.LockBasedStorageManager$LockBasedLazyValue.invoke(LockBasedStorageManager.java:355)
    at kotlin.reflect.jvm.internal.impl.storage.LockBasedStorageManager$LockBasedNotNullLazyValue.invoke(LockBasedStorageManager.java:474)
    at kotlin.reflect.jvm.internal.impl.load.java.lazy.descriptors.LazyJavaScope.getContributedDescriptors(LazyJavaScope.kt:342)
    at kotlin.reflect.jvm.internal.impl.resolve.scopes.ResolutionScope$DefaultImpls.getContributedDescriptors$default(ResolutionScope.kt:52)
    at kotlin.reflect.jvm.internal.KDeclarationContainerImpl.getMembers(KDeclarationContainerImpl.kt:65)
    at kotlin.reflect.jvm.internal.KClassImpl$Data$declaredNonStaticMembers$2.invoke(KClassImpl.kt:159)
    at kotlin.reflect.jvm.internal.KClassImpl$Data$declaredNonStaticMembers$2.invoke(KClassImpl.kt:44)
    at kotlin.reflect.jvm.internal.ReflectProperties$LazySoftVal.invoke(ReflectProperties.java:92)
    at kotlin.reflect.jvm.internal.ReflectProperties$Val.getValue(ReflectProperties.java:31)
    at kotlin.reflect.jvm.internal.KClassImpl$Data.getDeclaredNonStaticMembers(KClassImpl.kt)
    at kotlin.reflect.jvm.internal.KClassImpl$Data$allNonStaticMembers$2.invoke(KClassImpl.kt:168)
    at kotlin.reflect.jvm.internal.KClassImpl$Data$allNonStaticMembers$2.invoke(KClassImpl.kt:44)
    at kotlin.reflect.jvm.internal.ReflectProperties$LazySoftVal.invoke(ReflectProperties.java:92)
    at kotlin.reflect.jvm.internal.ReflectProperties$Val.getValue(ReflectProperties.java:31)
    at kotlin.reflect.jvm.internal.KClassImpl$Data.getAllNonStaticMembers(KClassImpl.kt)
    at kotlin.reflect.jvm.internal.KClassImpl$Data$allMembers$2.invoke(KClassImpl.kt:174)
    at kotlin.reflect.jvm.internal.KClassImpl$Data$allMembers$2.invoke(KClassImpl.kt:44)
    at kotlin.reflect.jvm.internal.ReflectProperties$LazySoftVal.invoke(ReflectProperties.java:92)
    at kotlin.reflect.jvm.internal.ReflectProperties$Val.getValue(ReflectProperties.java:31)
    at kotlin.reflect.jvm.internal.KClassImpl$Data.getAllMembers(KClassImpl.kt)
    at kotlin.reflect.jvm.internal.KClassImpl.getMembers(KClassImpl.kt:192)
    at kotlin.reflect.full.KClasses.getFunctions(KClasses.kt:90)
    at kotlin.reflect.jvm.ReflectJvmMapping.getKotlinFunction(ReflectJvmMapping.kt:134)
    at com.sample.App.main(App.java:16)

The repro project is available on https://github.com/sdeleuze/graal-issues/tree/master/kotlin-reflect.

bug native-image spring

Source