2 * Back 2 Browser Bytecode Translator
3 * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, version 2 of the License.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. Look for COPYING file in the top folder.
16 * If not, see http://opensource.org/licenses/GPL-2.0.
18 package org.apidesign.bck2brwsr.vm8;
20 import java.io.ByteArrayInputStream;
21 import java.io.IOException;
22 import java.io.InputStream;
23 import java.lang.invoke.CallSite;
24 import java.lang.invoke.MethodHandles;
25 import java.lang.invoke.MethodType;
26 import java.lang.reflect.Method;
28 import java.util.Enumeration;
29 import org.apidesign.vm4brwsr.Bck2Brwsr;
30 import org.objectweb.asm.ClassReader;
31 import org.objectweb.asm.ClassVisitor;
32 import org.objectweb.asm.ClassWriter;
33 import org.objectweb.asm.Handle;
34 import org.objectweb.asm.MethodVisitor;
35 import org.objectweb.asm.Opcodes;
36 import static org.objectweb.asm.Opcodes.ASM4;
37 import static org.objectweb.asm.Opcodes.INVOKESTATIC;
38 import static org.testng.Assert.*;
39 import org.testng.annotations.AfterClass;
40 import org.testng.annotations.BeforeClass;
41 import org.testng.annotations.Test;
45 * @author Jaroslav Tulach <jtulach@netbeans.org>
47 public class InvokeDynamicTest {
48 private static Class<?> invokeDynamicClass;
49 private static byte[] invokeDynamicBytes;
50 private static TestVM code;
52 @Test public void simpleDynamicInJava() throws Exception {
53 Method m = invokeDynamicClass.getMethod("dynamicSay");
54 Object ret = m.invoke(m);
55 assertEquals(ret, "Hello from Dynamic!");
58 @Test public void simpleDynamicInJS() throws Exception {
60 "Invoke dynamic can return a value", InvokeDynamic.class,
61 "dynamicSay__Ljava_lang_String_2",
66 private TestVM code() throws Exception {
68 final EmulResWithInvDyn emul = new EmulResWithInvDyn();
69 code = TestVM.compileClass(
71 InvokeDynamic.class.getName().replace('.', '/')
74 assertTrue(emul.loaded, "InvokeDynamic class should be processed!");
80 public static void releaseTheCode() {
85 // the following code is inspired by
86 // https://code.google.com/p/indy-maven-plugin/
87 // which I don't want to use, as it is not in a public repository
90 public static void prepareClass() throws Exception {
91 InputStream is = InvokeDynamic.class.getResourceAsStream("InvokeDynamic.class");
92 assertNotNull(is, "Class found");
94 ClassReader reader = new ClassReader(is) {
96 public short readShort(int index) {
100 return super.readShort(index);
103 ClassWriter writer = new ClassWriter(reader, 0);
106 new ClassVisitor(ASM4, writer) {
108 public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions
110 MethodVisitor mv = super.visitMethod(access, name, desc, signature, exceptions);
111 return new InvokeDynamicProcessor(mv);
116 invokeDynamicBytes = writer.toByteArray();
117 final boolean[] loaded = { false };
118 ClassLoader l = new ClassLoader() {
120 public Class<?> loadClass(String name) throws ClassNotFoundException {
121 if (name.equals(InvokeDynamic.class.getName())) {
123 return defineClass(name, invokeDynamicBytes, 0, invokeDynamicBytes.length);
125 return super.loadClass(name);
128 invokeDynamicClass = l.loadClass(InvokeDynamic.class.getName());
129 assertTrue(loaded[0], "InvokeDynamic class should be loaded!");
133 private static class InvokeDynamicProcessor extends MethodVisitor {
134 InvokeDynamicProcessor(MethodVisitor mv) {
139 public void visitMethodInsn(int opcode, String owner, String name, String desc) {
140 if (opcode == INVOKESTATIC) {
141 if (name.startsWith("TEST_dynamic_")) {
142 final String shortName = name.substring(13);
143 Handle mh = new Handle(
144 Opcodes.H_INVOKESTATIC, owner, shortName,
145 MethodType.methodType(
147 MethodHandles.Lookup.class,
150 ).toMethodDescriptorString()
152 super.visitInvokeDynamicInsn(shortName, desc, mh);
156 super.visitMethodInsn(opcode, owner, name, desc);
160 private static class EmulResWithInvDyn implements Bck2Brwsr.Resources {
164 public InputStream get(String name) throws IOException {
165 if ("org/apidesign/bck2brwsr/vm8/InvokeDynamic.class".equals(name)) {
167 return new ByteArrayInputStream(invokeDynamicBytes);
169 Enumeration<URL> en = InvokeDynamicTest.class.getClassLoader().getResources(name);
171 while (en.hasMoreElements()) {
172 u = en.nextElement();
175 throw new IOException("Can't find " + name);
177 if (u.toExternalForm().contains("rt.jar!")) {
178 throw new IOException("No emulation for " + u);
180 return u.openStream();