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
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
//
// ILParser.cs
//
// Author:
// Jb Evain (jbevain@gmail.com)
//
// Copyright (c) 2008 - 2011 Jb Evain
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using Mono.Cecil.Cil;
using Mono.Collections.Generic;
namespace Mono.Cecil.Rocks {
#if INSIDE_ROCKS
public
#endif
interface IILVisitor {
void OnInlineNone (OpCode opcode);
void OnInlineSByte (OpCode opcode, sbyte value);
void OnInlineByte (OpCode opcode, byte value);
void OnInlineInt32 (OpCode opcode, int value);
void OnInlineInt64 (OpCode opcode, long value);
void OnInlineSingle (OpCode opcode, float value);
void OnInlineDouble (OpCode opcode, double value);
void OnInlineString (OpCode opcode, string value);
void OnInlineBranch (OpCode opcode, int offset);
void OnInlineSwitch (OpCode opcode, int [] offsets);
void OnInlineVariable (OpCode opcode, VariableDefinition variable);
void OnInlineArgument (OpCode opcode, ParameterDefinition parameter);
void OnInlineSignature (OpCode opcode, CallSite callSite);
void OnInlineType (OpCode opcode, TypeReference type);
void OnInlineField (OpCode opcode, FieldReference field);
void OnInlineMethod (OpCode opcode, MethodReference method);
}
#if INSIDE_ROCKS
public
#endif
static class ILParser {
class ParseContext {
public CodeReader Code { get; set; }
public MetadataReader Metadata { get; set; }
public Collection<VariableDefinition> Variables { get; set; }
public IILVisitor Visitor { get; set; }
}
public static void Parse (MethodDefinition method, IILVisitor visitor)
{
if (method == null)
throw new ArgumentNullException ("method");
if (visitor == null)
throw new ArgumentNullException ("visitor");
if (!method.HasBody || !method.HasImage)
throw new ArgumentException ();
var context = CreateContext (method, visitor);
var code = context.Code;
code.MoveTo (method.RVA);
var flags = code.ReadByte ();
switch (flags & 0x3) {
case 0x2: // tiny
int code_size = flags >> 2;
ParseCode (code_size, context);
break;
case 0x3: // fat
code.position--;
ParseFatMethod (context);
break;
default:
throw new NotSupportedException ();
}
}
static ParseContext CreateContext (MethodDefinition method, IILVisitor visitor)
{
var code = method.Module.Read (method, (_, reader) => new CodeReader (reader.image.MetadataSection, reader));
return new ParseContext {
Code = code,
Metadata = code.reader,
Visitor = visitor,
};
}
static void ParseFatMethod (ParseContext context)
{
var code = context.Code;
code.Advance (4);
var code_size = code.ReadInt32 ();
var local_var_token = code.ReadToken ();
if (local_var_token != MetadataToken.Zero)
context.Variables = code.ReadVariables (local_var_token);
ParseCode (code_size, context);
}
static void ParseCode (int code_size, ParseContext context)
{
var code = context.Code;
var metadata = context.Metadata;
var visitor = context.Visitor;
var start = code.position;
var end = start + code_size;
while (code.position < end) {
var il_opcode = code.ReadByte ();
var opcode = il_opcode != 0xfe
? OpCodes.OneByteOpCode [il_opcode]
: OpCodes.TwoBytesOpCode [code.ReadByte ()];
switch (opcode.OperandType) {
case OperandType.InlineNone:
visitor.OnInlineNone (opcode);
break;
case OperandType.InlineSwitch:
var length = code.ReadInt32 ();
var branches = new int [length];
for (int i = 0; i < length; i++)
branches [i] = code.ReadInt32 ();
visitor.OnInlineSwitch (opcode, branches);
break;
case OperandType.ShortInlineBrTarget:
visitor.OnInlineBranch (opcode, code.ReadSByte ());
break;
case OperandType.InlineBrTarget:
visitor.OnInlineBranch (opcode, code.ReadInt32 ());
break;
case OperandType.ShortInlineI:
if (opcode == OpCodes.Ldc_I4_S)
visitor.OnInlineSByte (opcode, code.ReadSByte ());
else
visitor.OnInlineByte (opcode, code.ReadByte ());
break;
case OperandType.InlineI:
visitor.OnInlineInt32 (opcode, code.ReadInt32 ());
break;
case OperandType.InlineI8:
visitor.OnInlineInt64 (opcode, code.ReadInt64 ());
break;
case OperandType.ShortInlineR:
visitor.OnInlineSingle (opcode, code.ReadSingle ());
break;
case OperandType.InlineR:
visitor.OnInlineDouble (opcode, code.ReadDouble ());
break;
case OperandType.InlineSig:
visitor.OnInlineSignature (opcode, code.GetCallSite (code.ReadToken ()));
break;
case OperandType.InlineString:
visitor.OnInlineString (opcode, code.GetString (code.ReadToken ()));
break;
case OperandType.ShortInlineArg:
visitor.OnInlineArgument (opcode, code.GetParameter (code.ReadByte ()));
break;
case OperandType.InlineArg:
visitor.OnInlineArgument (opcode, code.GetParameter (code.ReadInt16 ()));
break;
case OperandType.ShortInlineVar:
visitor.OnInlineVariable (opcode, GetVariable (context, code.ReadByte ()));
break;
case OperandType.InlineVar:
visitor.OnInlineVariable (opcode, GetVariable (context, code.ReadInt16 ()));
break;
case OperandType.InlineTok:
case OperandType.InlineField:
case OperandType.InlineMethod:
case OperandType.InlineType:
var member = metadata.LookupToken (code.ReadToken ());
switch (member.MetadataToken.TokenType) {
case TokenType.TypeDef:
case TokenType.TypeRef:
case TokenType.TypeSpec:
visitor.OnInlineType (opcode, (TypeReference) member);
break;
case TokenType.Method:
case TokenType.MethodSpec:
visitor.OnInlineMethod (opcode, (MethodReference) member);
break;
case TokenType.Field:
visitor.OnInlineField (opcode, (FieldReference) member);
break;
case TokenType.MemberRef:
var field_ref = member as FieldReference;
if (field_ref != null) {
visitor.OnInlineField (opcode, field_ref);
break;
}
var method_ref = member as MethodReference;
if (method_ref != null) {
visitor.OnInlineMethod (opcode, method_ref);
break;
}
throw new InvalidOperationException ();
}
break;
}
}
}
static VariableDefinition GetVariable (ParseContext context, int index)
{
return context.Variables [index];
}
}
}
|
