1 /* 2 * Copyright (C) 2016 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.Method; 19 import java.util.Arrays; 20 21 public class Main { main(String[] args)22 public static void main(String[] args) throws Exception { 23 // Check whether we get the BootClassLoader (not null). 24 ClassLoader bootClassLoader = Object.class.getClassLoader(); 25 if (bootClassLoader == null) { 26 throw new IllegalStateException("Expected non-null classloader for Object"); 27 } 28 29 // Try to load libarttest(d) with the BootClassLoader. First construct the 30 // filename. It's in NATIVELOADER_DEFAULT_NAMESPACE_LIBS, so it's accessible 31 // simply through the file name. 32 String libName = System.mapLibraryName(args[0]); 33 34 // Then call an internal function that accepts the classloader. Do not use load(), as it 35 // is deprecated and only there for backwards compatibility, and prints a warning to the 36 // log that we'd have to strip (it contains the pid). 37 Method m = Runtime.class.getDeclaredMethod("nativeLoad", String.class, ClassLoader.class); 38 m.setAccessible(true); 39 Object result = m.invoke(Runtime.getRuntime(), libName, bootClassLoader); 40 if (result != null) { 41 throw new IllegalStateException(result.toString()); 42 } 43 44 System.out.println("Success."); 45 } 46 } 47