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.InvocationTargetException; 18 import java.lang.reflect.Method; 19 20 public class Main { 21 public static void main(String[] args) { 22 System.loadLibrary(args[0]); 23 24 testGetFieldId(TestClass.class, "intField", "I"); 25 testGetFieldId(TestClass.class, "intField", "int"); 26 testGetFieldId(TestClass.class, "intField", "Lint;"); 27 testGetFieldId(TestClass.class, "stringField", "I"); 28 testGetFieldId(TestClass.class, "stringField", "Ljava/lang/String;"); 29 testGetFieldId(TestClass.class, "stringField", "java/lang/String"); 30 testGetFieldId(TestClass.class, "stringField", "Ljava.lang.String;"); 31 testGetFieldId(TestClass.class, "stringField", "java.lang.String"); 32 33 try { 34 Method get = Main.class.getDeclaredMethod("getFieldId", 35 Class.class, 36 String.class, 37 String.class); 38 MyClassLoader loader = new MyClassLoader(Main.class.getClassLoader()); 39 Class<?> otherMain = Class.forName("Main", true, loader); 40 Method m = otherMain.getDeclaredMethod("testClassLoading", Method.class); 41 m.invoke(null, get); 42 } catch (Throwable t) { 43 t.printStackTrace(System.out); 44 } 45 } 46 47 public static void testClassLoading(Method get) throws Exception { 48 System.out.println("Test that MyClassLoader.loadClass(\"Bad.Class\") shall not be called."); 49 String[] bad_class_names = { "Bad/Class", "Bad.Class", "LBad.Class;" }; 50 for (String signature : bad_class_names) { 51 try { 52 get.invoke(null, TestClass.class, "bogus", signature); 53 System.out.println("FAIL!"); 54 } catch (InvocationTargetException ite) { 55 if (!(ite.getCause() instanceof NoSuchFieldError) || 56 !(ite.getCause().getCause() instanceof NoClassDefFoundError)) { 57 throw ite; 58 } 59 NoClassDefFoundError ncdfe = (NoClassDefFoundError) ite.getCause().getCause(); 60 System.out.println(" Error message for " + signature + ": " + ncdfe.getMessage()); 61 } 62 } 63 } 64 65 public static void testGetFieldId(Class<?> cls, String name, String signature) { 66 System.out.println("getFieldId(" + cls + ", \"" + name + "\", \"" + signature + "\")"); 67 try { 68 boolean result = getFieldId(cls, name, signature); 69 System.out.println("Result: " + result); 70 } catch (Throwable t) { 71 System.out.println("Caught " + DescribeThrowable(t)); 72 for (Throwable cause = t.getCause(); cause != null; cause = cause.getCause()) { 73 System.out.println(" caused by " + DescribeThrowable(cause)); 74 } 75 } 76 } 77 78 public static String DescribeThrowable(Throwable t) { 79 return PRINT_MESSAGE ? t.getClass().getName() + ": " + t.getMessage() 80 : t.getClass().getName(); 81 } 82 83 public static native boolean getFieldId(Class<?> cls, String name, String signature); 84 85 // Set to true to see actual messages. 86 public static final boolean PRINT_MESSAGE = false; 87 } 88 89 class TestClass { 90 public int intField; 91 public String stringField; 92 } 93 94 class MyClassLoader extends DefiningLoader { 95 public MyClassLoader(ClassLoader parent) { 96 super(parent); 97 } 98 99 public Class<?> loadClass(String name) throws ClassNotFoundException 100 { 101 if (name.equals("Bad.Class")) { 102 throw new Error("findClass(\"Bad.Class\")"); 103 } 104 return super.loadClass(name); 105 } 106 } 107
