1/*** 2 * ASM tests 3 * Copyright (c) 2002-2005 France Telecom 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the copyright holders nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30package org.objectweb.asm.commons; 31 32import org.objectweb.asm.ClassVisitor; 33import org.objectweb.asm.ClassWriter; 34import org.objectweb.asm.MethodVisitor; 35import org.objectweb.asm.Opcodes; 36 37import junit.framework.TestCase; 38 39/** 40 * @author Eric Bruneton 41 */ 42public class StaticInitMergerTest extends TestCase implements Opcodes { 43 44 private final static TestClassLoader LOADER = new TestClassLoader(); 45 46 public void test() throws Exception { 47 ClassWriter cw = new ClassWriter(true); 48 ClassVisitor cv = new StaticInitMerger("$clinit$", cw); 49 cv.visit(V1_1, ACC_PUBLIC, "A", null, "java/lang/Object", null); 50 cv.visitField(ACC_PUBLIC + ACC_STATIC, "counter", "I", null, null); 51 for (int i = 0; i < 5; ++i) { 52 MethodVisitor mv = cv.visitMethod(ACC_PUBLIC, 53 "<clinit>", 54 "()V", 55 null, 56 null); 57 mv.visitFieldInsn(GETSTATIC, "A", "counter", "I"); 58 mv.visitInsn(ICONST_1); 59 mv.visitInsn(IADD); 60 mv.visitFieldInsn(PUTSTATIC, "A", "counter", "I"); 61 mv.visitInsn(RETURN); 62 mv.visitMaxs(0, 0); 63 } 64 MethodVisitor mv = cv.visitMethod(ACC_PUBLIC, 65 "<init>", 66 "()V", 67 null, 68 null); 69 mv.visitVarInsn(ALOAD, 0); 70 mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V"); 71 mv.visitInsn(RETURN); 72 mv.visitMaxs(0, 0); 73 cv.visitEnd(); 74 75 Class c = LOADER.defineClass("A", cw.toByteArray()); 76 assertEquals(c.getField("counter").getInt(c.newInstance()), 5); 77 } 78 79 // ------------------------------------------------------------------------ 80 81 static class TestClassLoader extends ClassLoader { 82 83 public Class defineClass(final String name, final byte[] b) { 84 return defineClass(name, b, 0, b.length); 85 } 86 } 87} 88