1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/***
* ASM: a very small and fast Java bytecode manipulation framework
* Copyright (c) 2000-2005 INRIA, France Telecom
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.objectweb.asm.optimizer;
import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.Attribute;
import org.objectweb.asm.ClassAdapter;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
/**
* A {@link ClassAdapter} that renames fields and methods, and removes debug
* info.
*
* @author Eric Bruneton
*/
public class ClassOptimizer extends ClassAdapter {
private NameMapping mapping;
private String className;
private String pkgName;
public ClassOptimizer(final ClassVisitor cv, final NameMapping mapping) {
super(cv);
this.mapping = mapping;
}
public String getClassName() {
return className;
}
// ------------------------------------------------------------------------
// Overriden methods
// ------------------------------------------------------------------------
public void visit(
final int version,
final int access,
final String name,
final String signature,
final String superName,
final String[] interfaces)
{
className = name;
pkgName = name.substring(0, name.lastIndexOf('/'));
cv.visit(version,
access,
mapping.map(name),
null,
mapping.map(superName),
interfaces);
}
public void visitSource(final String source, final String debug) {
// remove debug info
}
public void visitOuterClass(
final String owner,
final String name,
final String desc)
{
// remove debug info
}
public AnnotationVisitor visitAnnotation(
final String desc,
final boolean visible)
{
throw new UnsupportedOperationException();
}
public void visitAttribute(final Attribute attr) {
// remove non standard attribute
}
public void visitInnerClass(
final String name,
final String outerName,
final String innerName,
final int access)
{
// remove debug info
}
public FieldVisitor visitField(
final int access,
final String name,
final String desc,
final String signature,
final Object value)
{
String s = className + "." + name;
if ((access & (Opcodes.ACC_PUBLIC | Opcodes.ACC_PROTECTED)) == 0) {
if ((access & Opcodes.ACC_FINAL) != 0
&& (access & Opcodes.ACC_STATIC) != 0 && desc.equals("I"))
{
return null;
}
if (pkgName.equals("org/objectweb/asm")
&& mapping.map(s).equals(name))
{
System.out.println("INFO: " + s + " could be renamed");
}
cv.visitField(access,
mapping.map(s),
mapping.fix(desc),
null,
value);
} else {
if (!mapping.map(s).equals(name)) {
throw new RuntimeException("The public or protected field " + s
+ " must not be renamed.");
}
cv.visitField(access, name, desc, null, value);
}
return null; // remove debug info
}
public MethodVisitor visitMethod(
final int access,
final String name,
final String desc,
final String signature,
final String[] exceptions)
{
String s = className + "." + name + desc;
if ((access & (Opcodes.ACC_PUBLIC | Opcodes.ACC_PROTECTED)) == 0) {
if (pkgName.equals("org/objectweb/asm") && !name.startsWith("<")
&& mapping.map(s).equals(name))
{
System.out.println("INFO: " + s + " could be renamed");
}
return new MethodOptimizer(cv.visitMethod(access,
mapping.map(s),
mapping.fix(desc),
null,
exceptions), mapping);
} else {
if (!mapping.map(s).equals(name)) {
throw new RuntimeException("The public or protected method "
+ s + " must not be renamed.");
}
return new MethodOptimizer(cv.visitMethod(access,
name,
desc,
null,
exceptions), mapping);
}
}
}
|
