GraalVM Native - Gradle

Hello from NATIVE Vert.x!

• ./gradlew clean nativeCompile
• ./build/native/nativeCompile/graalvm_gradle
  Hello world!
• task "jar" will also create a fat jar
  java -jar build/libs/graalvm_gradle-1.0-SNAPSHOT.jar
  java -cp build/libs/graalvm_gradle-1.0-SNAPSHOT.jar io.vertx.core.Launcher run org.example.MainVerticle

Added bucketloads of, and ...dependencies

From https://www.graalvm.org/22.2/reference-manual/native-image/guides/build-with-reflection/

• mkdir -p META-INF/native-image

• $JAVA_HOME/bin/java -cp build/libs/graalvm_gradle-1.0-SNAPSHOT.jar -agentlib:native-image-agent=config-output-dir=META-INF/native-image io.vertx.core.Launcher run org.example.MainVerticle

• Caused by: org.graalvm.compiler.java.BytecodeParser$BytecodeParserError: com.orjni-config.jsonacle.graal.pointsto.constraints.UnsupportedFeatureException:
  No instances of io.netty.util.internal.logging.Log4J2Logger are allowed in the image heap as this class should be initialized at image runtime.
  To see how this object got instantiated use

  • --trace-oge bject-instantiation=io.netty.util.internal.logging.Log4J2Logger.

Fixed by pushing ALL of netty into runtime initialization

graalvmNative {
    binaries {
        main {
            buildArgs.add('--initialize-at-run-time=io.netty')
        }
    }
}

• Disabled log4j
  • //implementation group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.20.0'
• Ran profiling to generate reflect-config.json (in META-INF subtree)

There be monsters below - you don't need to go any farther:

• Caused by: org.graalvm.compiler.java.BytecodeParser$BytecodeParserError: com.oracle.graal.pointsto.constraints.UnsupportedFeatureException:
  No instances of io.netty.util.internal.logging.Log4J2Logger are allowed in the image heap as this class should be initialized at image runtime.
  To see how this object got instantiated use
  • --trace-object-instantiation=io.netty.util.internal.logging.Log4J2Logger.
• https://stackoverflow.com/questions/63328298/how-do-you-debug-a-no-instances-of-are-allowed-in-the-image-heap-when-buil
• --initialize-at-build-time=io.netty.util.internal.logging.Log4J2Logger
• --trace-object-instantiation=io.netty.util.internal.logging.Log4J2Logger.
  • Object has been initialized by the io.netty.channel.nio.AbstractNioChannel class initializer
  • Object has been initialized by the io.netty.channel.socket.nio.SelectorProviderUtil
  • Object has been initialized by the io.netty.util.internal.PlatformDependent
  • Object has been initialized by the io.netty.util.internal.PlatformDependent0
  • Object has been initialized by the io.netty.util.internal.SystemPropertyUtil
  • Object has been initialized by the io.netty.util.concurrent.FastThreadLocalThread
  • Object has been initialized by the io.netty.channel.ChannelHandlerMask
• https://medium.com/graalvm/instant-netty-startup-using-graalvm-native-image-generation-ed6f14ff7692
  • ss
• https://stackoverflow.com/questions/60654455/how-to-fix-try-avoiding-to-initialize-the-class-that-caused-initialization-wit
• ERROR StatusLogger Unable to load services for service class org.apache.logging.log4j.spi.Provider
  java.lang.InternalError: com.oracle.svm.core.jdk.UnsupportedFeatureError: Defining hidden classes at runtime is not supported.