1 /* 2 * Copyright (c) 2015, 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 import com.sun.tools.classfile.*; 25 import com.sun.tools.classfile.BootstrapMethods_attribute.BootstrapMethodSpecifier; 26 import com.sun.tools.classfile.ConstantPool.CONSTANT_InvokeDynamic_info; 27 import com.sun.tools.classfile.ConstantPool.CONSTANT_MethodHandle_info; 28 29 import java.io.File; 30 31 /* 32 * @test 33 * @bug 8148483 8151516 8151223 34 * @summary Test that StringConcat is working for JDK >= 9 35 * @modules jdk.jdeps/com.sun.tools.classfile 36 * 37 * @clean TestIndyStringConcat* 38 * @compile -source 6 -target 6 TestIndyStringConcat.java 39 * @run main TestIndyStringConcat false 40 * 41 * @clean TestIndyStringConcat* 42 * @compile -source 7 -target 7 TestIndyStringConcat.java 43 * @run main TestIndyStringConcat false 44 * 45 * @clean TestIndyStringConcat* 46 * @compile -source 8 -target 8 TestIndyStringConcat.java 47 * @run main TestIndyStringConcat false 48 * 49 * @clean TestIndyStringConcat* 50 * @compile -XDstringConcat=inline -source 9 -target 9 TestIndyStringConcat.java 51 * @run main TestIndyStringConcat false 52 * 53 * @clean TestIndyStringConcat* 54 * @compile -XDstringConcat=indy -source 9 -target 9 TestIndyStringConcat.java 55 * @run main TestIndyStringConcat true 56 * 57 * @clean TestIndyStringConcat* 58 * @compile -XDstringConcat=indyWithConstants -source 9 -target 9 TestIndyStringConcat.java 59 * @run main TestIndyStringConcat true 60 */ 61 public class TestIndyStringConcat { 62 63 static String other; 64 65 public static String test() { 66 return "Foo" + other; 67 } 68 69 public static void main(String[] args) throws Exception { 70 boolean expected = Boolean.valueOf(args[0]); 71 boolean actual = hasStringConcatFactoryCall("test"); 72 if (expected != actual) { 73 throw new AssertionError("expected = " + expected + ", actual = " + actual); 74 } 75 } 76 77 public static boolean hasStringConcatFactoryCall(String methodName) throws Exception { 78 ClassFile classFile = ClassFile.read(new File(System.getProperty("test.classes", "."), 79 TestIndyStringConcat.class.getName() + ".class")); 80 ConstantPool constantPool = classFile.constant_pool; 81 82 BootstrapMethods_attribute bsm_attr = 83 (BootstrapMethods_attribute)classFile 84 .getAttribute(Attribute.BootstrapMethods); 85 86 for (Method method : classFile.methods) { 87 if (method.getName(constantPool).equals(methodName)) { 88 Code_attribute code = (Code_attribute) method.attributes 89 .get(Attribute.Code); 90 for (Instruction i : code.getInstructions()) { 91 if (i.getOpcode() == Opcode.INVOKEDYNAMIC) { 92 CONSTANT_InvokeDynamic_info indyInfo = 93 (CONSTANT_InvokeDynamic_info) constantPool.get(i.getUnsignedShort(1)); 94 95 BootstrapMethodSpecifier bsmSpec = 96 bsm_attr.bootstrap_method_specifiers[indyInfo.bootstrap_method_attr_index]; 97 98 CONSTANT_MethodHandle_info bsmInfo = 99 (CONSTANT_MethodHandle_info) constantPool.get(bsmSpec.bootstrap_method_ref); 100 101 if (bsmInfo.getCPRefInfo().getClassName().equals("java/lang/invoke/StringConcatFactory")) { 102 return true; 103 } 104 } 105 } 106 } 107 } 108 return false; 109 } 110 111 }