1 /* 2 * Copyright (C) 2021 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 import java.io.File; 18 import java.lang.reflect.Constructor; 19 import java.lang.reflect.Method; 20 21 final class Main { main(String[] args)22 public static void main(String[] args) throws Exception { 23 System.loadLibrary(args[0]); 24 MyLocalClass.callMethod(); 25 pkg1.SubClass.callMethod(); 26 loadClass(); 27 } 28 loadClass()29 public static void loadClass() throws Exception { 30 Class<?> pathClassLoader = Class.forName("dalvik.system.PathClassLoader"); 31 if (pathClassLoader == null) { 32 throw new AssertionError("Couldn't find path class loader class"); 33 } 34 Constructor<?> constructor = 35 pathClassLoader.getDeclaredConstructor(String.class, String.class, ClassLoader.class); 36 ClassLoader loader = (ClassLoader) constructor.newInstance( 37 DEX_FILE, LIBRARY_SEARCH_PATH, ClassLoader.getSystemClassLoader()); 38 Class<?> otherClass = loader.loadClass("Caller"); 39 40 // Run the method in interpreter / AOT mode. 41 otherClass.getMethod("doCall").invoke(null); 42 43 // Run the method in JIT mode. 44 ensureJitCompiled(otherClass, "doCall"); 45 otherClass.getMethod("doCall").invoke(null); 46 } 47 48 private static final String LIBRARY_SEARCH_PATH = System.getProperty("java.library.path"); 49 private static final String DEX_LOCATION = System.getenv("DEX_LOCATION"); 50 private static final String DEX_FILE = 51 new File(DEX_LOCATION, "827-resolve-method-ex.jar").getAbsolutePath(); 52 ensureJitCompiled(Class<?> cls, String methodName)53 private static native void ensureJitCompiled(Class<?> cls, String methodName); 54 } 55 56 class MyLocalClass extends pkg1.SubClass { 57 } 58