1 /* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 package runtime.valhalla.nestmates.p2; 25 26 import runtime.valhalla.nestmates.p1.Sup; 27 28 import java.lang.invoke.MethodHandle; 29 import java.lang.invoke.MethodHandles; 30 import java.lang.invoke.MethodType; 31 32 public class MethodHandleSubTop extends Sup { 33 34 final MethodHandles.Lookup METHOD_HANDLE_LOOKUP = MethodHandles.lookup(); 35 final MethodType METHOD_TYPE = MethodType.methodType(int.class); 36 37 // verify access check to a "super" method, method can be used in positive and negative test case 38 public MethodHandle getSuperMethodMH(String methodName) throws NoSuchMethodException, IllegalAccessException { 39 return METHOD_HANDLE_LOOKUP.findVirtual(this.getClass(), methodName, METHOD_TYPE); 40 } 41 42 // verify access check to a "super" field, method can be used in positive and negative test case 43 public MethodHandle getSuperFieldMH(String fieldName) throws NoSuchFieldException, IllegalAccessException { 44 return METHOD_HANDLE_LOOKUP.findGetter(this.getClass(), fieldName, int.class); 45 } 46 47 public class Inner { 48 49 public Inner() { 50 getField(); // to force javac to create a bridge 51 int x = field; // to force javac to create a bridge 52 } 53 54 // verify presence of an access bridge for a "super" method 55 public MethodHandle getSuperProtectedMethodMH() throws Throwable { 56 MethodType mt = MethodType.methodType(int.class, this.getClass().getEnclosingClass()); 57 MethodHandle mh = METHOD_HANDLE_LOOKUP.findStatic(this.getClass().getEnclosingClass(), "access$000", mt); 58 return mh; 59 } 60 61 // verify presence of an access bridge for a "super" field 62 public MethodHandle getSuperProtectedFieldMH() throws Throwable { 63 MethodType mt = MethodType.methodType(int.class, this.getClass().getEnclosingClass()); 64 MethodHandle mh = METHOD_HANDLE_LOOKUP.findStatic(this.getClass().getEnclosingClass(), "access$100", mt); 65 return mh; 66 } 67 68 // verify access check to a "super" method without an access bridge 69 public MethodHandle getSuperMethodMH(String methodName) throws NoSuchMethodException, IllegalAccessException { 70 return METHOD_HANDLE_LOOKUP.findVirtual(this.getClass(), methodName, METHOD_TYPE); 71 } 72 73 // verify access check to a "super" field without an access bridge 74 public MethodHandle getSuperFieldMH(String fieldName) throws NoSuchFieldException, IllegalAccessException { 75 return METHOD_HANDLE_LOOKUP.findGetter(this.getClass(), fieldName, int.class); 76 } 77 78 public class InnerInner { 79 80 public InnerInner() { 81 getField(); // to force javac to create a bridge 82 int x = field; // to force javac to create a bridge 83 } 84 85 // verify presence of an access bridge for a "super" method 86 public MethodHandle getSuperProtectedMethodMH() throws Throwable { 87 MethodType mt = MethodType.methodType(int.class, MethodHandleSubTop.class); 88 MethodHandle mh = METHOD_HANDLE_LOOKUP.findStatic(MethodHandleSubTop.class, "access$400", mt); 89 return mh; 90 } 91 92 // verify presence of an access bridge for a "super" field 93 public MethodHandle getSuperProtectedFieldMH() throws Throwable { 94 MethodType mt = MethodType.methodType(int.class, MethodHandleSubTop.class); 95 MethodHandle mh = METHOD_HANDLE_LOOKUP.findStatic(MethodHandleSubTop.class, "access$500", mt); 96 return mh; 97 } 98 99 // verify access check to a "super" method without an access bridge 100 public MethodHandle getSuperMethodMH(String methodName) throws NoSuchMethodException, IllegalAccessException { 101 return METHOD_HANDLE_LOOKUP.findVirtual(this.getClass(), methodName, METHOD_TYPE); 102 } 103 104 // verify access check to a "super" field without an access bridge 105 public MethodHandle getSuperFieldMH(String fieldName) throws NoSuchFieldException, IllegalAccessException { 106 return METHOD_HANDLE_LOOKUP.findGetter(this.getClass(), fieldName, int.class); 107 } 108 } 109 } 110 111 }