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
|
/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2013 Eric Lafortune (eric@graphics.cornell.edu)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program 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 for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard.classfile.attribute.preverification;
import proguard.classfile.*;
import proguard.classfile.attribute.*;
import proguard.classfile.attribute.preverification.visitor.StackMapFrameVisitor;
import proguard.classfile.attribute.visitor.AttributeVisitor;
/**
* This Attribute represents a stack map table attribute.
*
* @author Eric Lafortune
*/
public class StackMapTableAttribute extends Attribute
{
public int u2stackMapFramesCount;
public StackMapFrame[] stackMapFrames;
/**
* Creates an uninitialized StackMapTableAttribute.
*/
public StackMapTableAttribute()
{
}
/**
* Creates a StackMapTableAttribute with the given stack map frames.
*/
public StackMapTableAttribute(StackMapFrame[] stackMapFrames)
{
this(stackMapFrames.length, stackMapFrames);
}
/**
* Creates a StackMapTableAttribute with the given stack map frames.
*/
public StackMapTableAttribute(int stackMapFramesCount,
StackMapFrame[] stackMapFrames)
{
this.u2stackMapFramesCount = stackMapFramesCount;
this.stackMapFrames = stackMapFrames;
}
// Implementations for Attribute.
public void accept(Clazz clazz, Method method, CodeAttribute codeAttribute, AttributeVisitor attributeVisitor)
{
attributeVisitor.visitStackMapTableAttribute(clazz, method, codeAttribute, this);
}
/**
* Applies the given stack map frame visitor to all stack map frames.
*/
public void stackMapFramesAccept(Clazz clazz, Method method, CodeAttribute codeAttribute, StackMapFrameVisitor stackMapFrameVisitor)
{
int offset = 0;
for (int index = 0; index < u2stackMapFramesCount; index++)
{
StackMapFrame stackMapFrame = stackMapFrames[index];
// Note that the byte code offset is computed differently for the
// first stack map frame.
offset += stackMapFrame.getOffsetDelta() + (index == 0 ? 0 : 1);
stackMapFrame.accept(clazz, method, codeAttribute, offset, stackMapFrameVisitor);
}
}
}
|
