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
|
/*
* Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package vm.mlvm.share;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import nsk.share.ArgumentParser;
public abstract class ClassfileGenerator {
public static class Klass {
private String pkgName;
private String className;
private byte[] bytes;
private String mainMethodName;
private String mainMethodSignature;
public Klass(String packageName, String className, String mainMethodName, String mainMethodSignature, byte[] bytes) {
this.pkgName = packageName;
this.className = className;
this.mainMethodName = mainMethodName;
this.mainMethodSignature = mainMethodSignature;
this.bytes = bytes;
}
public String getClassName() {
return (this.pkgName != null ? (this.pkgName + ".") : "") + this.className;
}
public String getSimpleClassName() {
return this.className;
}
public String getPackageName() {
return this.pkgName;
}
public String getMainMethodName() {
return mainMethodName;
}
public String getMainMethodSignature() {
return mainMethodSignature;
}
public byte[] getBytes() {
return this.bytes;
}
public void writeClass(String destDir) throws IOException {
boolean wroteOk = false;
File outDir;
if (this.pkgName != null)
outDir = new File(destDir, this.pkgName.replace('.', '/'));
else
outDir = new File(".");
outDir.mkdirs();
File outFile = new File(outDir, this.className.concat(".class"));
FileOutputStream outStream = new FileOutputStream(outFile);
try {
outStream.write(this.bytes);
wroteOk = true;
} finally {
outStream.close();
if (!wroteOk)
outFile.delete();
}
}
}
protected String fullClassName, pkgName, shortClassName;
public void setClassName(String pkgName, String shortClassName) {
this.pkgName = pkgName;
this.shortClassName = shortClassName;
fullClassName = (pkgName == null ? "" : (pkgName.replace('.', '/') + '/'))
+ shortClassName;
}
public abstract Klass[] generateBytecodes();
public static void main(String[] args) {
try {
Env.init(new ArgumentParser(args) {
@Override
protected boolean checkOption(String option, String value) {
if (option.equals("d"))
return true;
return super.checkOption(option, value);
}
});
Class<?> caller = Class.forName(Thread.currentThread()
.getStackTrace()[2].getClassName());
ClassfileGenerator gen = (ClassfileGenerator) caller.newInstance();
gen.setClassName(caller.getPackage().getName(), caller
.getSimpleName().replaceFirst("^GENERATE_", ""));
String destDir = Env.getArgParser().getOptions().getProperty("d");
Klass[] klasses = gen.generateBytecodes();
for (Klass k : klasses)
k.writeClass(destDir);
} catch (Exception e) {
Env.complain(e, "Generator caught an error");
System.exit(1);
}
}
}
|
