108 lines
4.2 KiB
Java
108 lines
4.2 KiB
Java
/*
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* Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import com.sun.tools.classfile.*;
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import com.sun.tools.classfile.BootstrapMethods_attribute.BootstrapMethodSpecifier;
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import com.sun.tools.classfile.ConstantPool.CONSTANT_InvokeDynamic_info;
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import com.sun.tools.classfile.ConstantPool.CONSTANT_MethodHandle_info;
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import java.io.File;
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/*
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* @test
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* @bug 8148483 8151516 8151223
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* @summary Test that StringConcat is working for JDK >= 9
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* @modules jdk.jdeps/com.sun.tools.classfile
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*
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* @clean TestIndyStringConcat*
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* @compile -source 7 -target 7 TestIndyStringConcat.java
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* @run main TestIndyStringConcat false
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*
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* @clean TestIndyStringConcat*
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* @compile -source 8 -target 8 TestIndyStringConcat.java
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* @run main TestIndyStringConcat false
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*
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* @clean TestIndyStringConcat*
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* @compile -XDstringConcat=inline -source 9 -target 9 TestIndyStringConcat.java
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* @run main TestIndyStringConcat false
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*
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* @clean TestIndyStringConcat*
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* @compile -XDstringConcat=indy -source 9 -target 9 TestIndyStringConcat.java
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* @run main TestIndyStringConcat true
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*
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* @clean TestIndyStringConcat*
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* @compile -XDstringConcat=indyWithConstants -source 9 -target 9 TestIndyStringConcat.java
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* @run main TestIndyStringConcat true
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*/
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public class TestIndyStringConcat {
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static String other;
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public static String test() {
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return "Foo" + other;
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}
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public static void main(String[] args) throws Exception {
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boolean expected = Boolean.valueOf(args[0]);
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boolean actual = hasStringConcatFactoryCall("test");
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if (expected != actual) {
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throw new AssertionError("expected = " + expected + ", actual = " + actual);
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}
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}
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public static boolean hasStringConcatFactoryCall(String methodName) throws Exception {
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ClassFile classFile = ClassFile.read(new File(System.getProperty("test.classes", "."),
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TestIndyStringConcat.class.getName() + ".class"));
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ConstantPool constantPool = classFile.constant_pool;
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BootstrapMethods_attribute bsm_attr =
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(BootstrapMethods_attribute)classFile
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.getAttribute(Attribute.BootstrapMethods);
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for (Method method : classFile.methods) {
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if (method.getName(constantPool).equals(methodName)) {
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Code_attribute code = (Code_attribute) method.attributes
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.get(Attribute.Code);
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for (Instruction i : code.getInstructions()) {
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if (i.getOpcode() == Opcode.INVOKEDYNAMIC) {
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CONSTANT_InvokeDynamic_info indyInfo =
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(CONSTANT_InvokeDynamic_info) constantPool.get(i.getUnsignedShort(1));
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BootstrapMethodSpecifier bsmSpec =
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bsm_attr.bootstrap_method_specifiers[indyInfo.bootstrap_method_attr_index];
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CONSTANT_MethodHandle_info bsmInfo =
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(CONSTANT_MethodHandle_info) constantPool.get(bsmSpec.bootstrap_method_ref);
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if (bsmInfo.getCPRefInfo().getClassName().equals("java/lang/invoke/StringConcatFactory")) {
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return true;
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}
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}
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}
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}
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}
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return false;
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}
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}
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