1/* 2 * Copyright (c) 2015, 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 24package compiler.calls.common; 25 26import java.lang.invoke.CallSite; 27import java.lang.invoke.ConstantCallSite; 28import java.lang.invoke.MethodHandles; 29import java.lang.invoke.MethodType; 30 31/** 32 * A test class checking InvokeDynamic instruction. 33 * This is not quite "ready-to-use" class, since javac can't generate indy 34 * directly(only as part of lambda init) so, this class bytecode should be 35 * patched with method "caller" which uses indy. Other methods can be written in 36 * java for easier support and readability. 37 */ 38 39public class InvokeDynamic extends CallsBase { 40 private static final Object LOCK = new Object(); 41 42 public static void main(String args[]) { 43 new InvokeDynamic().runTest(args); 44 } 45 46 /** 47 * Caller method to call "callee" method. Must be overwritten with InvokeDynamicPatcher 48 */ 49 @Override 50 public void caller() { 51 } 52 53 /** 54 * A bootstrap method for invokedynamic 55 * @param lookup a lookup object 56 * @param methodName methodName 57 * @param type method type 58 * @return CallSite for method 59 */ 60 public static CallSite bootstrapMethod(MethodHandles.Lookup lookup, 61 String methodName, MethodType type) throws IllegalAccessException, 62 NoSuchMethodException { 63 MethodType mtype = MethodType.methodType(boolean.class, 64 new Class<?>[]{int.class, long.class, float.class, 65 double.class, String.class}); 66 return new ConstantCallSite(lookup.findVirtual(lookup.lookupClass(), 67 methodName, mtype)); 68 } 69 70 /** 71 * A callee method, assumed to be called by "caller" 72 */ 73 public boolean callee(int param1, long param2, float param3, double param4, 74 String param5) { 75 calleeVisited = true; 76 CallsBase.checkValues(param1, param2, param3, param4, param5); 77 return true; 78 } 79 80 /** 81 * A native callee method, assumed to be called by "caller" 82 */ 83 public native boolean calleeNative(int param1, long param2, float param3, 84 double param4, String param5); 85 86 /** 87 * Returns object to lock execution on 88 * @return lock object 89 */ 90 @Override 91 protected Object getLockObject() { 92 return LOCK; 93 } 94 95 @Override 96 protected void callerNative() { 97 throw new Error("No native call for invokedynamic"); 98 } 99} 100