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Java > Open Source Codes > org > objectweb > asm > JavassistPerfTest


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  */
30 package org.objectweb.asm;
31
32 import java.io.InputStream JavaDoc;
33 import java.lang.reflect.Modifier JavaDoc;
34
35 import javassist.ClassPool;
36 import javassist.CtClass;
37 import javassist.CtField;
38 import javassist.CtMethod;
39 import javassist.bytecode.Bytecode;
40 import javassist.bytecode.CodeIterator;
41 import javassist.bytecode.MethodInfo;
42 import javassist.bytecode.Opcode;
43
44 /**
45  * @author Eric Bruneton
46  */
47 public class JavassistPerfTest extends ALLPerfTest {
48
49     public static void main(final String JavaDoc args[]) throws Exception JavaDoc {
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 JavaDoc is, final String JavaDoc name)
65             throws Exception JavaDoc
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 JavaDoc is, final String JavaDoc name)
81             throws Exception JavaDoc
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
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