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/*
* 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.
*/
import art.Redefinition;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Base64;
public class Main {
private static String TEST_NAME = "1964-add-to-dex-classloader-file";
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 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(e);
e.printStackTrace();
}
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);
}
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 URLClassLoader {
public ExtensibleClassLoader() {
// Initially we don't have any URLs
super(new URL[] {}, ExtensibleClassLoader.class.getClassLoader());
}
public void addSingleUrl(String file) throws Exception {
this.addURL(new URL("file://" + file));
}
protected Class<?> findClass(String name) throws ClassNotFoundException {
// Just define the TestClass without other jars.
if (name.equals(TEST_CLASS_NAME)) {
return this.defineClass(TEST_CLASS_NAME, CLASS_BYTES, 0, CLASS_BYTES.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), Main.class.getClassLoader());
}
}
public static void addToClassLoader(ClassLoader cl) throws Exception {
if (IS_ART) {
addToClassLoaderNative(cl, System.getenv("DEX_LOCATION") + "/" + TEST_NAME + "-ex.jar");
} else {
((ExtensibleClassLoader)cl).addSingleUrl(System.getenv("DEX_LOCATION") + "/classes-ex/");
}
}
public static native void addToClassLoaderNative(ClassLoader loader, String segment);
public static void main(String[] args) throws Exception {
run();
}
}
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