test/1963-add-to-dex-classloader-in-memory/src/art/Test1963.java - platform/art - Git at Google

 /*
  * Copyright (C) 2019 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package art;

 import java.lang.reflect.Constructor;
 import java.lang.reflect.Method;
 import java.nio.ByteBuffer;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Base64;

 public final class Test1963 {
   private static boolean IS_ART = System.getProperty("java.vm.name").equals("Dalvik");

   private static String TEST_CLASS_NAME = "foobar.TestClass";
   private static String NEW_CLASS_NAME = "foobar.NewClass";

   /**
    * base64 encoded class/dex file for
    * package foobar;
    * public class NewClass {
    *   static void sayHi() {
    *    System.out.println("Hello from NewClass sayHi function");
    *    TestClass.sayBye();
    *   }
    * }
    */
   private static byte[] NEW_CLASS_BYTES = Base64.getDecoder().decode(
       "yv66vgAAADUAIQoABwAPCQAQABEIABIKABMAFAoAFQAWBwAXBwAYAQAGPGluaXQ+AQADKClWAQAE"
       + "Q29kZQEAD0xpbmVOdW1iZXJUYWJsZQEABXNheUhpAQAKU291cmNlRmlsZQEADU5ld0NsYXNzLmph"
       + "dmEMAAgACQcAGQwAGgAbAQAiSGVsbG8gZnJvbSBOZXdDbGFzcyBzYXlIaSBmdW5jdGlvbgcAHAwA"
       + "HQAeBwAfDAAgAAkBAA9mb29iYXIvTmV3Q2xhc3MBABBqYXZhL2xhbmcvT2JqZWN0AQAQamF2YS9s"
       + "YW5nL1N5c3RlbQEAA291dAEAFUxqYXZhL2lvL1ByaW50U3RyZWFtOwEAE2phdmEvaW8vUHJpbnRT"
       + "dHJlYW0BAAdwcmludGxuAQAVKExqYXZhL2xhbmcvU3RyaW5nOylWAQAQZm9vYmFyL1Rlc3RDbGFz"
       + "cwEABnNheUJ5ZQAhAAYABwAAAAAAAgABAAgACQABAAoAAAAdAAEAAQAAAAUqtwABsQAAAAEACwAA"
       + "AAYAAQAAAAIACAAMAAkAAQAKAAAALAACAAAAAAAMsgACEgO2AAS4AAWxAAAAAQALAAAADgADAAAA"
       + "BAAIAAUACwAGAAEADQAAAAIADg==");
   private static byte[] NEW_DEX_BYTES = Base64.getDecoder().decode(
       "ZGV4CjAzNQA8kzH5IALCWT88v716WlU7OfqukCT2o6WQAwAAcAAAAHhWNBIAAAAAAAAAAOQCAAAQ"
       + "AAAAcAAAAAcAAACwAAAAAgAAAMwAAAABAAAA5AAAAAUAAADsAAAAAQAAABQBAABcAgAANAEAAIIB"
       + "AACKAQAArgEAAMEBAADVAQAA7AEAAAACAAAUAgAAKAIAADcCAAA6AgAAPgIAAEMCAABMAgAAVAIA"
       + "AFsCAAACAAAAAwAAAAQAAAAFAAAABgAAAAcAAAAJAAAACQAAAAYAAAAAAAAACgAAAAYAAAB8AQAA"
       + "BQACAAsAAAAAAAAAAAAAAAAAAAAOAAAAAQAAAA0AAAACAAEADAAAAAMAAAAAAAAAAAAAAAEAAAAD"
       + "AAAAAAAAAAgAAAAAAAAA0gIAAAAAAAABAAEAAQAAAHIBAAAEAAAAcBAEAAAADgACAAAAAgAAAHYB"
       + "AAALAAAAYgAAABoBAQBuIAMAEABxAAIAAAAOAAIADgAEAA54PAABAAAABAAGPGluaXQ+ACJIZWxs"
       + "byBmcm9tIE5ld0NsYXNzIHNheUhpIGZ1bmN0aW9uABFMZm9vYmFyL05ld0NsYXNzOwASTGZvb2Jh"
       + "ci9UZXN0Q2xhc3M7ABVMamF2YS9pby9QcmludFN0cmVhbTsAEkxqYXZhL2xhbmcvT2JqZWN0OwAS"
       + "TGphdmEvbGFuZy9TdHJpbmc7ABJMamF2YS9sYW5nL1N5c3RlbTsADU5ld0NsYXNzLmphdmEAAVYA"
       + "AlZMAANvdXQAB3ByaW50bG4ABnNheUJ5ZQAFc2F5SGkAdX5+RDh7ImNvbXBpbGF0aW9uLW1vZGUi"
       + "OiJkZWJ1ZyIsIm1pbi1hcGkiOjEsInNoYS0xIjoiZDMyODJiOGY1NDdjMjM0YzRlNGM5MzA5YzM2"
       + "Yzc5NWEyOTg1NmVhYiIsInZlcnNpb24iOiIxLjYuMS1kZXYifQAAAAIAAIGABLQCAQjMAgAAAAAO"
       + "AAAAAAAAAAEAAAAAAAAAAQAAABAAAABwAAAAAgAAAAcAAACwAAAAAwAAAAIAAADMAAAABAAAAAEA"
       + "AADkAAAABQAAAAUAAADsAAAABgAAAAEAAAAUAQAAASAAAAIAAAA0AQAAAyAAAAIAAAByAQAAARAA"
       + "AAEAAAB8AQAAAiAAABAAAACCAQAAACAAAAEAAADSAgAAAxAAAAEAAADgAgAAABAAAAEAAADkAgAA");
   /**
    * base64 encoded class/dex file for
    * package foobar;
    * public class TestClass {
    *   public static void sayHi() {
    *    System.out.println("Hello again from TestClass sayHi function");
    *    TestClass.sayBye();
    *   }
    *   static void sayBye() {
    *    System.out.println("Goodbye from TestClass!");
    *   }
    * }
    */
   private static byte[] CLASS_BYTES = Base64.getDecoder().decode(
       "yv66vgAAADUAIQoACAARCQASABMIABQKABUAFgoABwAXCAAYBwAZBwAaAQAGPGluaXQ+AQADKClW"
       + "AQAEQ29kZQEAD0xpbmVOdW1iZXJUYWJsZQEABXNheUhpAQAGc2F5QnllAQAKU291cmNlRmlsZQEA"
       + "DlRlc3RDbGFzcy5qYXZhDAAJAAoHABsMABwAHQEAI0hlbGxvIGZyb20gVGVzdENsYXNzIHNheUhp"
       + "IGZ1bmN0aW9uBwAeDAAfACAMAA4ACgEAF0dvb2RieWUgZnJvbSBUZXN0Q2xhc3MhAQAQZm9vYmFy"
       + "L1Rlc3RDbGFzcwEAEGphdmEvbGFuZy9PYmplY3QBABBqYXZhL2xhbmcvU3lzdGVtAQADb3V0AQAV"
       + "TGphdmEvaW8vUHJpbnRTdHJlYW07AQATamF2YS9pby9QcmludFN0cmVhbQEAB3ByaW50bG4BABUo"
       + "TGphdmEvbGFuZy9TdHJpbmc7KVYAIQAHAAgAAAAAAAMAAQAJAAoAAQALAAAAHQABAAEAAAAFKrcA"
       + "AbEAAAABAAwAAAAGAAEAAAACAAkADQAKAAEACwAAACwAAgAAAAAADLIAAhIDtgAEuAAFsQAAAAEA"
       + "DAAAAA4AAwAAAAQACAAFAAsABgAIAA4ACgABAAsAAAAlAAIAAAAAAAmyAAISBrYABLEAAAABAAwA"
       + "AAAKAAIAAAAIAAgACQABAA8AAAACABA=");

   private static byte[] DEX_BYTES = Base64.getDecoder().decode(
       "ZGV4CjAzNQARmtFTPdWXebnrTNy5b71tEiJKC96qIPXAAwAAcAAAAHhWNBIAAAAAAAAAABQDAAAQ"
       + "AAAAcAAAAAYAAACwAAAAAgAAAMgAAAABAAAA4AAAAAUAAADoAAAAAQAAABABAACQAgAAMAEAAKYB"
       + "AACuAQAAxwEAAOwBAAAAAgAAFwIAACsCAAA/AgAAUwIAAGMCAABmAgAAagIAAG8CAAB4AgAAgAIA"
       + "AIcCAAADAAAABAAAAAUAAAAGAAAABwAAAAkAAAAJAAAABQAAAAAAAAAKAAAABQAAAKABAAAEAAEA"
       + "CwAAAAAAAAAAAAAAAAAAAA0AAAAAAAAADgAAAAEAAQAMAAAAAgAAAAAAAAAAAAAAAQAAAAIAAAAA"
       + "AAAACAAAAAAAAAD+AgAAAAAAAAEAAQABAAAAjgEAAAQAAABwEAQAAAAOAAIAAAACAAAAkgEAAAgA"
       + "AABiAAAAGgEBAG4gAwAQAA4AAgAAAAIAAACXAQAACwAAAGIAAAAaAQIAbiADABAAcQABAAAADgAC"
       + "AA4ACAAOeAAEAA54PAAAAAABAAAAAwAGPGluaXQ+ABdHb29kYnllIGZyb20gVGVzdENsYXNzIQAj"
       + "SGVsbG8gZnJvbSBUZXN0Q2xhc3Mgc2F5SGkgZnVuY3Rpb24AEkxmb29iYXIvVGVzdENsYXNzOwAV"
       + "TGphdmEvaW8vUHJpbnRTdHJlYW07ABJMamF2YS9sYW5nL09iamVjdDsAEkxqYXZhL2xhbmcvU3Ry"
       + "aW5nOwASTGphdmEvbGFuZy9TeXN0ZW07AA5UZXN0Q2xhc3MuamF2YQABVgACVkwAA291dAAHcHJp"
       + "bnRsbgAGc2F5QnllAAVzYXlIaQB1fn5EOHsiY29tcGlsYXRpb24tbW9kZSI6ImRlYnVnIiwibWlu"
       + "LWFwaSI6MSwic2hhLTEiOiJkMzI4MmI4ZjU0N2MyMzRjNGU0YzkzMDljMzZjNzk1YTI5ODU2ZWFi"
       + "IiwidmVyc2lvbiI6IjEuNi4xLWRldiJ9AAAAAwAAgYAEsAIBCMgCAQnoAgAAAAAOAAAAAAAAAAEA"
       + "AAAAAAAAAQAAABAAAABwAAAAAgAAAAYAAACwAAAAAwAAAAIAAADIAAAABAAAAAEAAADgAAAABQAA"
       + "AAUAAADoAAAABgAAAAEAAAAQAQAAASAAAAMAAAAwAQAAAyAAAAMAAACOAQAAARAAAAEAAACgAQAA"
       + "AiAAABAAAACmAQAAACAAAAEAAAD+AgAAAxAAAAEAAAAQAwAAABAAAAEAAAAUAwAA");
   /**
    * base64 encoded class/dex file for
    * package foobar;
    * public class TestClass {
    *   public static void sayHi() {
    *    System.out.println("Hello again from TestClass sayHi function");
    *    NewClass.sayHi();
    *   }
    *   static void sayBye() {
    *    System.out.println("Goodbye again from TestClass!");
    *   }
    * }
    */
   private static byte[] REDEF_CLASS_BYTES = Base64.getDecoder().decode(
       "yv66vgAAADUAIwoACAARCQASABMIABQKABUAFgoAFwAYCAAZBwAaBwAbAQAGPGluaXQ+AQADKClW"
       + "AQAEQ29kZQEAD0xpbmVOdW1iZXJUYWJsZQEABXNheUhpAQAGc2F5QnllAQAKU291cmNlRmlsZQEA"
       + "DlRlc3RDbGFzcy5qYXZhDAAJAAoHABwMAB0AHgEAKUhlbGxvIGFnYWluIGZyb20gVGVzdENsYXNz"
       + "IHNheUhpIGZ1bmN0aW9uBwAfDAAgACEHACIMAA0ACgEAHUdvb2RieWUgYWdhaW4gZnJvbSBUZXN0"
       + "Q2xhc3MhAQAQZm9vYmFyL1Rlc3RDbGFzcwEAEGphdmEvbGFuZy9PYmplY3QBABBqYXZhL2xhbmcv"
       + "U3lzdGVtAQADb3V0AQAVTGphdmEvaW8vUHJpbnRTdHJlYW07AQATamF2YS9pby9QcmludFN0cmVh"
       + "bQEAB3ByaW50bG4BABUoTGphdmEvbGFuZy9TdHJpbmc7KVYBAA9mb29iYXIvTmV3Q2xhc3MAIQAH"
       + "AAgAAAAAAAMAAQAJAAoAAQALAAAAHQABAAEAAAAFKrcAAbEAAAABAAwAAAAGAAEAAAACAAkADQAK"
       + "AAEACwAAACwAAgAAAAAADLIAAhIDtgAEuAAFsQAAAAEADAAAAA4AAwAAAAQACAAFAAsABgAIAA4A"
       + "CgABAAsAAAAlAAIAAAAAAAmyAAISBrYABLEAAAABAAwAAAAKAAIAAAAIAAgACQABAA8AAAACABA=");

   private static byte[] REDEF_DEX_BYTES = Base64.getDecoder().decode(
       "ZGV4CjAzNQA2plEeYRH4vl6wJgnAZOVcZ537QN9NXB3wAwAAcAAAAHhWNBIAAAAAAAAAAEQDAAAR"
       + "AAAAcAAAAAcAAAC0AAAAAgAAANAAAAABAAAA6AAAAAYAAADwAAAAAQAAACABAACwAgAAQAEAALYB"
       + "AAC+AQAA3QEAAAgCAAAbAgAALwIAAEYCAABaAgAAbgIAAIICAACSAgAAlQIAAJkCAACeAgAApwIA"
       + "AK8CAAC2AgAAAwAAAAQAAAAFAAAABgAAAAcAAAAIAAAACgAAAAoAAAAGAAAAAAAAAAsAAAAGAAAA"
       + "sAEAAAUAAgAMAAAAAAAAAA8AAAABAAAAAAAAAAEAAAAOAAAAAQAAAA8AAAACAAEADQAAAAMAAAAA"
       + "AAAAAQAAAAEAAAADAAAAAAAAAAkAAAAAAAAALQMAAAAAAAABAAEAAQAAAJ4BAAAEAAAAcBAFAAAA"
       + "DgACAAAAAgAAAKIBAAAIAAAAYgAAABoBAQBuIAQAEAAOAAIAAAACAAAApwEAAAsAAABiAAAAGgEC"
       + "AG4gBAAQAHEAAAAAAA4AAgAOAAgADngABAAOeDwAAAAAAQAAAAQABjxpbml0PgAdR29vZGJ5ZSBh"
       + "Z2FpbiBmcm9tIFRlc3RDbGFzcyEAKUhlbGxvIGFnYWluIGZyb20gVGVzdENsYXNzIHNheUhpIGZ1"
       + "bmN0aW9uABFMZm9vYmFyL05ld0NsYXNzOwASTGZvb2Jhci9UZXN0Q2xhc3M7ABVMamF2YS9pby9Q"
       + "cmludFN0cmVhbTsAEkxqYXZhL2xhbmcvT2JqZWN0OwASTGphdmEvbGFuZy9TdHJpbmc7ABJMamF2"
       + "YS9sYW5nL1N5c3RlbTsADlRlc3RDbGFzcy5qYXZhAAFWAAJWTAADb3V0AAdwcmludGxuAAZzYXlC"
       + "eWUABXNheUhpAHV+fkQ4eyJjb21waWxhdGlvbi1tb2RlIjoiZGVidWciLCJtaW4tYXBpIjoxLCJz"
       + "aGEtMSI6ImQzMjgyYjhmNTQ3YzIzNGM0ZTRjOTMwOWMzNmM3OTVhMjk4NTZlYWIiLCJ2ZXJzaW9u"
       + "IjoiMS42LjEtZGV2In0AAAADAAGBgATAAgEI2AIBCfgCAAAAAAAOAAAAAAAAAAEAAAAAAAAAAQAA"
       + "ABEAAABwAAAAAgAAAAcAAAC0AAAAAwAAAAIAAADQAAAABAAAAAEAAADoAAAABQAAAAYAAADwAAAA"
       + "BgAAAAEAAAAgAQAAASAAAAMAAABAAQAAAyAAAAMAAACeAQAAARAAAAEAAACwAQAAAiAAABEAAAC2"
       + "AQAAACAAAAEAAAAtAwAAAxAAAAEAAABAAwAAABAAAAEAAABEAwAA");

   public static void SafePrintCause(Throwable t) {
     StackTraceElement cause = t.getStackTrace()[0];
     System.out.println(" --- " + t.getClass().getName() + " At " + cause.getClassName() + "." +
                        cause.getMethodName() + "(" + cause.getFileName() + ":" +
                        cause.getLineNumber() + ")");
   }

   public static void run() throws Exception {
     System.out.println(" - Run while adding new referenced class.");
     try {
       run(true);
     } catch (Exception e) {
       // Unfortunately art and RI have different messages here so just return the type.
       System.out.println(" -- Exception caught when running test with new class added! " +
                          e.getCause().getClass().getName());
       SafePrintCause(e.getCause());
     }
     System.out.println(" - Run without adding new referenced class.");
     try {
       run(false);
     } catch (Exception e) {
       // Unfortunately art and RI have different messages here so just return the type.
       System.out.println(" -- Exception caught when running test without new class added! " +
                          e.getCause().getClass().getName());
       SafePrintCause(e.getCause());
     }
   }

   public static void run(boolean add_new) throws Exception {
     ClassLoader cl = getClassLoader();
     Class<?> target = cl.loadClass(TEST_CLASS_NAME);
     Method sayHi = target.getDeclaredMethod("sayHi");
     System.out.println(" -- Running sayHi before redefinition");
     sayHi.invoke(null);
     if (add_new) {
       System.out.println(" -- Adding NewClass to classloader!");
       addToClassLoader(cl, NEW_CLASS_BYTES, NEW_DEX_BYTES);
     }
     System.out.println(" -- Redefine the TestClass");
     Redefinition.doCommonClassRedefinition(target, REDEF_CLASS_BYTES, REDEF_DEX_BYTES);
     System.out.println(" -- call TestClass again, now with NewClass refs");
     sayHi.invoke(null);
   }

   public static class ExtensibleClassLoader extends ClassLoader {
     private byte[] new_class = null;
     public ExtensibleClassLoader() {
       super(ExtensibleClassLoader.class.getClassLoader());
     }

     public void addSingleClass(byte[] bb) {
       new_class = bb;
     }

     protected Class<?> findClass(String name) throws ClassNotFoundException {
       if (name.equals(TEST_CLASS_NAME)) {
         return this.defineClass(TEST_CLASS_NAME, CLASS_BYTES, 0, CLASS_BYTES.length);
       }
       if (name.equals(NEW_CLASS_NAME) && new_class != null) {
         return this.defineClass(name, new_class, 0, new_class.length);
       } else {
         return super.findClass(name);
       }
     }
   }

   public static ClassLoader getClassLoader() throws Exception {
     if (!IS_ART) {
       return new ExtensibleClassLoader();
     } else {
       Class<?> class_loader_class = Class.forName("dalvik.system.InMemoryDexClassLoader");
       Constructor<?> ctor = class_loader_class.getConstructor(ByteBuffer.class, ClassLoader.class);
       return (ClassLoader)ctor.newInstance(ByteBuffer.wrap(DEX_BYTES),
                                            Test1963.class.getClassLoader());
     }
   }

   public static void addToClassLoader(ClassLoader cl, byte[] class_bytes, byte[] dex_bytes) {
     if (IS_ART) {
       addToClassLoaderNative(cl, ByteBuffer.allocateDirect(dex_bytes.length).put(dex_bytes));
     } else {
       ((ExtensibleClassLoader)cl).addSingleClass(class_bytes);
     }
   }

   public static native void addToClassLoaderNative(ClassLoader loader, ByteBuffer buff);
 }
	/*
	* Copyright (C) 2019 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package art;

	import java.lang.reflect.Constructor;
	import java.lang.reflect.Method;
	import java.nio.ByteBuffer;
	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.Base64;

	public final class Test1963 {
	private static boolean IS_ART = System.getProperty("java.vm.name").equals("Dalvik");

	private static String TEST_CLASS_NAME = "foobar.TestClass";
	private static String NEW_CLASS_NAME = "foobar.NewClass";

	/**
	* base64 encoded class/dex file for
	* package foobar;
	* public class NewClass {
	* static void sayHi() {
	* System.out.println("Hello from NewClass sayHi function");
	* TestClass.sayBye();
	* }
	* }
	*/
	private static byte[] NEW_CLASS_BYTES = Base64.getDecoder().decode(
	"yv66vgAAADUAIQoABwAPCQAQABEIABIKABMAFAoAFQAWBwAXBwAYAQAGPGluaXQ+AQADKClWAQAE"
	+ "Q29kZQEAD0xpbmVOdW1iZXJUYWJsZQEABXNheUhpAQAKU291cmNlRmlsZQEADU5ld0NsYXNzLmph"
	+ "dmEMAAgACQcAGQwAGgAbAQAiSGVsbG8gZnJvbSBOZXdDbGFzcyBzYXlIaSBmdW5jdGlvbgcAHAwA"
	+ "HQAeBwAfDAAgAAkBAA9mb29iYXIvTmV3Q2xhc3MBABBqYXZhL2xhbmcvT2JqZWN0AQAQamF2YS9s"
	+ "YW5nL1N5c3RlbQEAA291dAEAFUxqYXZhL2lvL1ByaW50U3RyZWFtOwEAE2phdmEvaW8vUHJpbnRT"
	+ "dHJlYW0BAAdwcmludGxuAQAVKExqYXZhL2xhbmcvU3RyaW5nOylWAQAQZm9vYmFyL1Rlc3RDbGFz"
	+ "cwEABnNheUJ5ZQAhAAYABwAAAAAAAgABAAgACQABAAoAAAAdAAEAAQAAAAUqtwABsQAAAAEACwAA"
	+ "AAYAAQAAAAIACAAMAAkAAQAKAAAALAACAAAAAAAMsgACEgO2AAS4AAWxAAAAAQALAAAADgADAAAA"
	+ "BAAIAAUACwAGAAEADQAAAAIADg==");
	private static byte[] NEW_DEX_BYTES = Base64.getDecoder().decode(
	"ZGV4CjAzNQA8kzH5IALCWT88v716WlU7OfqukCT2o6WQAwAAcAAAAHhWNBIAAAAAAAAAAOQCAAAQ"
	+ "AAAAcAAAAAcAAACwAAAAAgAAAMwAAAABAAAA5AAAAAUAAADsAAAAAQAAABQBAABcAgAANAEAAIIB"
	+ "AACKAQAArgEAAMEBAADVAQAA7AEAAAACAAAUAgAAKAIAADcCAAA6AgAAPgIAAEMCAABMAgAAVAIA"
	+ "AFsCAAACAAAAAwAAAAQAAAAFAAAABgAAAAcAAAAJAAAACQAAAAYAAAAAAAAACgAAAAYAAAB8AQAA"
	+ "BQACAAsAAAAAAAAAAAAAAAAAAAAOAAAAAQAAAA0AAAACAAEADAAAAAMAAAAAAAAAAAAAAAEAAAAD"
	+ "AAAAAAAAAAgAAAAAAAAA0gIAAAAAAAABAAEAAQAAAHIBAAAEAAAAcBAEAAAADgACAAAAAgAAAHYB"
	+ "AAALAAAAYgAAABoBAQBuIAMAEABxAAIAAAAOAAIADgAEAA54PAABAAAABAAGPGluaXQ+ACJIZWxs"
	+ "byBmcm9tIE5ld0NsYXNzIHNheUhpIGZ1bmN0aW9uABFMZm9vYmFyL05ld0NsYXNzOwASTGZvb2Jh"
	+ "ci9UZXN0Q2xhc3M7ABVMamF2YS9pby9QcmludFN0cmVhbTsAEkxqYXZhL2xhbmcvT2JqZWN0OwAS"
	+ "TGphdmEvbGFuZy9TdHJpbmc7ABJMamF2YS9sYW5nL1N5c3RlbTsADU5ld0NsYXNzLmphdmEAAVYA"
	+ "AlZMAANvdXQAB3ByaW50bG4ABnNheUJ5ZQAFc2F5SGkAdX5+RDh7ImNvbXBpbGF0aW9uLW1vZGUi"
	+ "OiJkZWJ1ZyIsIm1pbi1hcGkiOjEsInNoYS0xIjoiZDMyODJiOGY1NDdjMjM0YzRlNGM5MzA5YzM2"
	+ "Yzc5NWEyOTg1NmVhYiIsInZlcnNpb24iOiIxLjYuMS1kZXYifQAAAAIAAIGABLQCAQjMAgAAAAAO"
	+ "AAAAAAAAAAEAAAAAAAAAAQAAABAAAABwAAAAAgAAAAcAAACwAAAAAwAAAAIAAADMAAAABAAAAAEA"
	+ "AADkAAAABQAAAAUAAADsAAAABgAAAAEAAAAUAQAAASAAAAIAAAA0AQAAAyAAAAIAAAByAQAAARAA"
	+ "AAEAAAB8AQAAAiAAABAAAACCAQAAACAAAAEAAADSAgAAAxAAAAEAAADgAgAAABAAAAEAAADkAgAA");
	/**
	* base64 encoded class/dex file for
	* package foobar;
	* public class TestClass {
	* public static void sayHi() {
	* System.out.println("Hello again from TestClass sayHi function");
	* TestClass.sayBye();
	* }
	* static void sayBye() {
	* System.out.println("Goodbye from TestClass!");
	* }
	* }
	*/
	private static byte[] CLASS_BYTES = Base64.getDecoder().decode(
	"yv66vgAAADUAIQoACAARCQASABMIABQKABUAFgoABwAXCAAYBwAZBwAaAQAGPGluaXQ+AQADKClW"
	+ "AQAEQ29kZQEAD0xpbmVOdW1iZXJUYWJsZQEABXNheUhpAQAGc2F5QnllAQAKU291cmNlRmlsZQEA"
	+ "DlRlc3RDbGFzcy5qYXZhDAAJAAoHABsMABwAHQEAI0hlbGxvIGZyb20gVGVzdENsYXNzIHNheUhp"
	+ "IGZ1bmN0aW9uBwAeDAAfACAMAA4ACgEAF0dvb2RieWUgZnJvbSBUZXN0Q2xhc3MhAQAQZm9vYmFy"
	+ "L1Rlc3RDbGFzcwEAEGphdmEvbGFuZy9PYmplY3QBABBqYXZhL2xhbmcvU3lzdGVtAQADb3V0AQAV"
	+ "TGphdmEvaW8vUHJpbnRTdHJlYW07AQATamF2YS9pby9QcmludFN0cmVhbQEAB3ByaW50bG4BABUo"
	+ "TGphdmEvbGFuZy9TdHJpbmc7KVYAIQAHAAgAAAAAAAMAAQAJAAoAAQALAAAAHQABAAEAAAAFKrcA"
	+ "AbEAAAABAAwAAAAGAAEAAAACAAkADQAKAAEACwAAACwAAgAAAAAADLIAAhIDtgAEuAAFsQAAAAEA"
	+ "DAAAAA4AAwAAAAQACAAFAAsABgAIAA4ACgABAAsAAAAlAAIAAAAAAAmyAAISBrYABLEAAAABAAwA"
	+ "AAAKAAIAAAAIAAgACQABAA8AAAACABA=");

	private static byte[] DEX_BYTES = Base64.getDecoder().decode(
	"ZGV4CjAzNQARmtFTPdWXebnrTNy5b71tEiJKC96qIPXAAwAAcAAAAHhWNBIAAAAAAAAAABQDAAAQ"
	+ "AAAAcAAAAAYAAACwAAAAAgAAAMgAAAABAAAA4AAAAAUAAADoAAAAAQAAABABAACQAgAAMAEAAKYB"
	+ "AACuAQAAxwEAAOwBAAAAAgAAFwIAACsCAAA/AgAAUwIAAGMCAABmAgAAagIAAG8CAAB4AgAAgAIA"
	+ "AIcCAAADAAAABAAAAAUAAAAGAAAABwAAAAkAAAAJAAAABQAAAAAAAAAKAAAABQAAAKABAAAEAAEA"
	+ "CwAAAAAAAAAAAAAAAAAAAA0AAAAAAAAADgAAAAEAAQAMAAAAAgAAAAAAAAAAAAAAAQAAAAIAAAAA"
	+ "AAAACAAAAAAAAAD+AgAAAAAAAAEAAQABAAAAjgEAAAQAAABwEAQAAAAOAAIAAAACAAAAkgEAAAgA"
	+ "AABiAAAAGgEBAG4gAwAQAA4AAgAAAAIAAACXAQAACwAAAGIAAAAaAQIAbiADABAAcQABAAAADgAC"
	+ "AA4ACAAOeAAEAA54PAAAAAABAAAAAwAGPGluaXQ+ABdHb29kYnllIGZyb20gVGVzdENsYXNzIQAj"
	+ "SGVsbG8gZnJvbSBUZXN0Q2xhc3Mgc2F5SGkgZnVuY3Rpb24AEkxmb29iYXIvVGVzdENsYXNzOwAV"
	+ "TGphdmEvaW8vUHJpbnRTdHJlYW07ABJMamF2YS9sYW5nL09iamVjdDsAEkxqYXZhL2xhbmcvU3Ry"
	+ "aW5nOwASTGphdmEvbGFuZy9TeXN0ZW07AA5UZXN0Q2xhc3MuamF2YQABVgACVkwAA291dAAHcHJp"
	+ "bnRsbgAGc2F5QnllAAVzYXlIaQB1fn5EOHsiY29tcGlsYXRpb24tbW9kZSI6ImRlYnVnIiwibWlu"
	+ "LWFwaSI6MSwic2hhLTEiOiJkMzI4MmI4ZjU0N2MyMzRjNGU0YzkzMDljMzZjNzk1YTI5ODU2ZWFi"
	+ "IiwidmVyc2lvbiI6IjEuNi4xLWRldiJ9AAAAAwAAgYAEsAIBCMgCAQnoAgAAAAAOAAAAAAAAAAEA"
	+ "AAAAAAAAAQAAABAAAABwAAAAAgAAAAYAAACwAAAAAwAAAAIAAADIAAAABAAAAAEAAADgAAAABQAA"
	+ "AAUAAADoAAAABgAAAAEAAAAQAQAAASAAAAMAAAAwAQAAAyAAAAMAAACOAQAAARAAAAEAAACgAQAA"
	+ "AiAAABAAAACmAQAAACAAAAEAAAD+AgAAAxAAAAEAAAAQAwAAABAAAAEAAAAUAwAA");
	/**
	* base64 encoded class/dex file for
	* package foobar;
	* public class TestClass {
	* public static void sayHi() {
	* System.out.println("Hello again from TestClass sayHi function");
	* NewClass.sayHi();
	* }
	* static void sayBye() {
	* System.out.println("Goodbye again from TestClass!");
	* }
	* }
	*/
	private static byte[] REDEF_CLASS_BYTES = Base64.getDecoder().decode(
	"yv66vgAAADUAIwoACAARCQASABMIABQKABUAFgoAFwAYCAAZBwAaBwAbAQAGPGluaXQ+AQADKClW"
	+ "AQAEQ29kZQEAD0xpbmVOdW1iZXJUYWJsZQEABXNheUhpAQAGc2F5QnllAQAKU291cmNlRmlsZQEA"
	+ "DlRlc3RDbGFzcy5qYXZhDAAJAAoHABwMAB0AHgEAKUhlbGxvIGFnYWluIGZyb20gVGVzdENsYXNz"
	+ "IHNheUhpIGZ1bmN0aW9uBwAfDAAgACEHACIMAA0ACgEAHUdvb2RieWUgYWdhaW4gZnJvbSBUZXN0"
	+ "Q2xhc3MhAQAQZm9vYmFyL1Rlc3RDbGFzcwEAEGphdmEvbGFuZy9PYmplY3QBABBqYXZhL2xhbmcv"
	+ "U3lzdGVtAQADb3V0AQAVTGphdmEvaW8vUHJpbnRTdHJlYW07AQATamF2YS9pby9QcmludFN0cmVh"
	+ "bQEAB3ByaW50bG4BABUoTGphdmEvbGFuZy9TdHJpbmc7KVYBAA9mb29iYXIvTmV3Q2xhc3MAIQAH"
	+ "AAgAAAAAAAMAAQAJAAoAAQALAAAAHQABAAEAAAAFKrcAAbEAAAABAAwAAAAGAAEAAAACAAkADQAK"
	+ "AAEACwAAACwAAgAAAAAADLIAAhIDtgAEuAAFsQAAAAEADAAAAA4AAwAAAAQACAAFAAsABgAIAA4A"
	+ "CgABAAsAAAAlAAIAAAAAAAmyAAISBrYABLEAAAABAAwAAAAKAAIAAAAIAAgACQABAA8AAAACABA=");

	private static byte[] REDEF_DEX_BYTES = Base64.getDecoder().decode(
	"ZGV4CjAzNQA2plEeYRH4vl6wJgnAZOVcZ537QN9NXB3wAwAAcAAAAHhWNBIAAAAAAAAAAEQDAAAR"
	+ "AAAAcAAAAAcAAAC0AAAAAgAAANAAAAABAAAA6AAAAAYAAADwAAAAAQAAACABAACwAgAAQAEAALYB"
	+ "AAC+AQAA3QEAAAgCAAAbAgAALwIAAEYCAABaAgAAbgIAAIICAACSAgAAlQIAAJkCAACeAgAApwIA"
	+ "AK8CAAC2AgAAAwAAAAQAAAAFAAAABgAAAAcAAAAIAAAACgAAAAoAAAAGAAAAAAAAAAsAAAAGAAAA"
	+ "sAEAAAUAAgAMAAAAAAAAAA8AAAABAAAAAAAAAAEAAAAOAAAAAQAAAA8AAAACAAEADQAAAAMAAAAA"
	+ "AAAAAQAAAAEAAAADAAAAAAAAAAkAAAAAAAAALQMAAAAAAAABAAEAAQAAAJ4BAAAEAAAAcBAFAAAA"
	+ "DgACAAAAAgAAAKIBAAAIAAAAYgAAABoBAQBuIAQAEAAOAAIAAAACAAAApwEAAAsAAABiAAAAGgEC"
	+ "AG4gBAAQAHEAAAAAAA4AAgAOAAgADngABAAOeDwAAAAAAQAAAAQABjxpbml0PgAdR29vZGJ5ZSBh"
	+ "Z2FpbiBmcm9tIFRlc3RDbGFzcyEAKUhlbGxvIGFnYWluIGZyb20gVGVzdENsYXNzIHNheUhpIGZ1"
	+ "bmN0aW9uABFMZm9vYmFyL05ld0NsYXNzOwASTGZvb2Jhci9UZXN0Q2xhc3M7ABVMamF2YS9pby9Q"
	+ "cmludFN0cmVhbTsAEkxqYXZhL2xhbmcvT2JqZWN0OwASTGphdmEvbGFuZy9TdHJpbmc7ABJMamF2"
	+ "YS9sYW5nL1N5c3RlbTsADlRlc3RDbGFzcy5qYXZhAAFWAAJWTAADb3V0AAdwcmludGxuAAZzYXlC"
	+ "eWUABXNheUhpAHV+fkQ4eyJjb21waWxhdGlvbi1tb2RlIjoiZGVidWciLCJtaW4tYXBpIjoxLCJz"
	+ "aGEtMSI6ImQzMjgyYjhmNTQ3YzIzNGM0ZTRjOTMwOWMzNmM3OTVhMjk4NTZlYWIiLCJ2ZXJzaW9u"
	+ "IjoiMS42LjEtZGV2In0AAAADAAGBgATAAgEI2AIBCfgCAAAAAAAOAAAAAAAAAAEAAAAAAAAAAQAA"
	+ "ABEAAABwAAAAAgAAAAcAAAC0AAAAAwAAAAIAAADQAAAABAAAAAEAAADoAAAABQAAAAYAAADwAAAA"
	+ "BgAAAAEAAAAgAQAAASAAAAMAAABAAQAAAyAAAAMAAACeAQAAARAAAAEAAACwAQAAAiAAABEAAAC2"
	+ "AQAAACAAAAEAAAAtAwAAAxAAAAEAAABAAwAAABAAAAEAAABEAwAA");

	public static void SafePrintCause(Throwable t) {
	StackTraceElement cause = t.getStackTrace()[0];
	System.out.println(" --- " + t.getClass().getName() + " At " + cause.getClassName() + "." +
	cause.getMethodName() + "(" + cause.getFileName() + ":" +
	cause.getLineNumber() + ")");
	}

	public static void run() throws Exception {
	System.out.println(" - Run while adding new referenced class.");
	try {
	run(true);
	} catch (Exception e) {
	// Unfortunately art and RI have different messages here so just return the type.
	System.out.println(" -- Exception caught when running test with new class added! " +
	e.getCause().getClass().getName());
	SafePrintCause(e.getCause());
	}
	System.out.println(" - Run without adding new referenced class.");
	try {
	run(false);
	} catch (Exception e) {
	// Unfortunately art and RI have different messages here so just return the type.
	System.out.println(" -- Exception caught when running test without new class added! " +
	e.getCause().getClass().getName());
	SafePrintCause(e.getCause());
	}
	}

	public static void run(boolean add_new) throws Exception {
	ClassLoader cl = getClassLoader();
	Class<?> target = cl.loadClass(TEST_CLASS_NAME);
	Method sayHi = target.getDeclaredMethod("sayHi");
	System.out.println(" -- Running sayHi before redefinition");
	sayHi.invoke(null);
	if (add_new) {
	System.out.println(" -- Adding NewClass to classloader!");
	addToClassLoader(cl, NEW_CLASS_BYTES, NEW_DEX_BYTES);
	}
	System.out.println(" -- Redefine the TestClass");
	Redefinition.doCommonClassRedefinition(target, REDEF_CLASS_BYTES, REDEF_DEX_BYTES);
	System.out.println(" -- call TestClass again, now with NewClass refs");
	sayHi.invoke(null);
	}

	public static class ExtensibleClassLoader extends ClassLoader {
	private byte[] new_class = null;
	public ExtensibleClassLoader() {
	super(ExtensibleClassLoader.class.getClassLoader());
	}

	public void addSingleClass(byte[] bb) {
	new_class = bb;
	}

	protected Class<?> findClass(String name) throws ClassNotFoundException {
	if (name.equals(TEST_CLASS_NAME)) {
	return this.defineClass(TEST_CLASS_NAME, CLASS_BYTES, 0, CLASS_BYTES.length);
	}
	if (name.equals(NEW_CLASS_NAME) && new_class != null) {
	return this.defineClass(name, new_class, 0, new_class.length);
	} else {
	return super.findClass(name);
	}
	}
	}

	public static ClassLoader getClassLoader() throws Exception {
	if (!IS_ART) {
	return new ExtensibleClassLoader();
	} else {
	Class<?> class_loader_class = Class.forName("dalvik.system.InMemoryDexClassLoader");
	Constructor<?> ctor = class_loader_class.getConstructor(ByteBuffer.class, ClassLoader.class);
	return (ClassLoader)ctor.newInstance(ByteBuffer.wrap(DEX_BYTES),
	Test1963.class.getClassLoader());
	}
	}

	public static void addToClassLoader(ClassLoader cl, byte[] class_bytes, byte[] dex_bytes) {
	if (IS_ART) {
	addToClassLoaderNative(cl, ByteBuffer.allocateDirect(dex_bytes.length).put(dex_bytes));
	} else {
	((ExtensibleClassLoader)cl).addSingleClass(class_bytes);
	}
	}

	public static native void addToClassLoaderNative(ClassLoader loader, ByteBuffer buff);
	}