1/***
2 * ASM performance test: measures the performances of asm package
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;
31
32import java.io.InputStream;
33import java.lang.reflect.Modifier;
34
35import javassist.ClassPool;
36import javassist.CtClass;
37import javassist.CtField;
38import javassist.CtMethod;
39import javassist.bytecode.Bytecode;
40import javassist.bytecode.CodeIterator;
41import javassist.bytecode.MethodInfo;
42import javassist.bytecode.Opcode;
43
44/**
45 * @author Eric Bruneton
46 */
47public class JavassistPerfTest extends ALLPerfTest {
48
49    public static void main(final String args[]) throws Exception {
50        System.out.println("Javassist PERFORMANCES\n");
51        new JavassistPerfTest().perfs(args);
52    }
53
54    ClassPool pool;
55
56    public JavassistPerfTest() {
57        pool = new ClassPool(null);
58    }
59
60    ALLPerfTest newInstance() {
61        return new JavassistPerfTest();
62    }
63
64    byte[] nullAdaptClass(final InputStream is, final String name)
65            throws Exception
66    {
67        CtClass cc = pool.makeClass(is);
68        CtMethod[] ms = cc.getDeclaredMethods();
69        for (int j = 0; j < ms.length; ++j) {
70            if (skipDebug) {
71                // is there a mean to remove the debug attributes?
72            }
73            if (compute) {
74                // how to force recomputation of maxStack and maxLocals?
75            }
76        }
77        return cc.toBytecode();
78    }
79
80    byte[] counterAdaptClass(final InputStream is, final String name)
81            throws Exception
82    {
83        CtClass cc = pool.makeClass(is);
84        if (!cc.isInterface()) {
85            cc.addField(new CtField(CtClass.intType, "_counter", cc));
86        }
87        CtMethod[] ms = cc.getDeclaredMethods();
88        for (int j = 0; j < ms.length; ++j) {
89            CtMethod m = ms[j];
90            int modifiers = m.getModifiers();
91            if (!Modifier.isStatic(modifiers)
92                    && !Modifier.isAbstract(modifiers)
93                    && !Modifier.isNative(modifiers))
94            {
95                if (!m.isEmpty()) {
96                    MethodInfo info = m.getMethodInfo();
97                    Bytecode bc = new Bytecode(info.getConstPool(), 1, 0);
98                    bc.addAload(0);
99                    bc.addAload(0);
100                    bc.addGetfield(cc, "_counter", "I");
101                    bc.add(Opcode.ICONST_1);
102                    bc.add(Opcode.IADD);
103                    bc.addPutfield(cc, "_counter", "I");
104                    CodeIterator iter = info.getCodeAttribute().iterator();
105                    iter.begin();
106                    iter.insert(bc.get());
107                }
108            }
109        }
110        return cc.toBytecode();
111    }
112}
113