1 /* 2 * Copyright (C) 2017 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.lang.reflect.Constructor; 18 import java.lang.reflect.Method; 19 20 public class Main { 21 public static String TEST_NAME = "155-java-set-resolved-type"; 22 23 public static void main(String[] args) { 24 try { 25 Class<?> class_loader_class = Class.forName("dalvik.system.PathClassLoader"); 26 System.loadLibrary(args[0]); 27 } catch (ClassNotFoundException e) { 28 usingRI = true; 29 // Add expected JNI_OnLoad log line to match expected.txt. 30 System.out.println("JNI_OnLoad called"); 31 } 32 try { 33 String dex_location = System.getenv("DEX_LOCATION"); 34 ClassLoader systemLoader = ClassLoader.getSystemClassLoader().getParent(); 35 ClassLoader exLoader = getClassLoaderFor(dex_location, systemLoader, /* ex */ true); 36 ClassLoader mainLoader = getClassLoaderFor(dex_location, exLoader, /* ex */ false); 37 38 // Resolve TestParameter class. It shall be defined by mainLoader. 39 // This does not resolve method parameter types. 40 Class<?> tpc = Class.forName("TestParameter", false, mainLoader); 41 // Get declared methods of TestParameter. 42 // This still does not resolve method parameter types. 43 Method[] ms = tpc.getDeclaredMethods(); 44 if (ms == null || ms.length != 1) { throw new Error("Unexpected methods"); }; 45 // Call getParameterTypes() to resolve parameter types. The parameter type 46 // TestInterface shall be defined by the exLoader. This used to store the 47 // TestInterface class in the dex cache resolved types for the mainLoader 48 // but not in the mainLoader's class table. This discrepancy used to cause 49 // a crash further down. 50 ms[0].getParameterTypes(); 51 52 // Resolve but do not initialize TestImplementation. During the resolution, 53 // we see the TestInterface in the dex cache, so we do not try to look it up 54 // or resolve it using the mainLoader. 55 Class<?> timpl = Class.forName("TestImplementation", false, mainLoader); 56 // Clear the dex cache resolved types to force a proper lookup the next time 57 // we need to find TestInterface. 58 clearResolvedTypes(timpl); 59 60 // Force intialization of TestImplementation. This expects the interface type 61 // to be resolved and found through simple lookup. 62 timpl.newInstance(); 63 } catch (Throwable t) { 64 t.printStackTrace(System.out); 65 } 66 } 67 68 public static ClassLoader getClassLoaderFor(String location, ClassLoader parent, boolean ex) 69 throws Exception { 70 try { 71 Class<?> class_loader_class = Class.forName("dalvik.system.PathClassLoader"); 72 Constructor<?> ctor = 73 class_loader_class.getConstructor(String.class, ClassLoader.class); 74 /* on Dalvik, this is a DexFile; otherwise, it's null */ 75 String path = location + "/" + TEST_NAME + (ex ? "-ex.jar" : ".jar"); 76 return (ClassLoader)ctor.newInstance(path, parent); 77 } catch (ClassNotFoundException e) { 78 // Running on RI. Use URLClassLoader. 79 String url = "file://" + location + (ex ? "/classes-ex/" : "/classes/"); 80 return new java.net.URLClassLoader( 81 new java.net.URL[] { new java.net.URL(url) }, parent); 82 } 83 } 84 85 public static void clearResolvedTypes(Class<?> c) { 86 if (!usingRI) { 87 nativeClearResolvedTypes(c); 88 } 89 } 90 91 private static boolean usingRI = false; 92 93 public static native void nativeClearResolvedTypes(Class<?> c); 94 } 95
