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
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
|
//
// ContractRuntime.cs
//
// Authors:
// Chris Bacon (chrisbacon76@gmail.com)
//
// Copyright (C) 2010 Chris Bacon
//
// 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 System.Collections.Generic;
using System.Linq;
using System.Text;
using Mono.Cecil;
using System.Diagnostics.Contracts;
using Mono.Cecil.Cil;
using System.Diagnostics;
using System.Runtime.ConstrainedExecution;
using System.Runtime.CompilerServices;
namespace Mono.CodeContracts.Rewrite {
class ContractsRuntime {
private const string Namespace = "System.Diagnostics.Contracts";
public ContractsRuntime (ModuleDefinition module, RewriterOptions options)
{
this.module = module;
this.options = options;
}
private ModuleDefinition module;
private RewriterOptions options;
private TypeDefinition typeContractsRuntime = null;
private TypeDefinition typeContractException = null;
private MethodDefinition methodContractExceptionCons = null;
private MethodDefinition methodTriggerFailure = null;
private MethodDefinition methodReportFailure = null;
private MethodDefinition methodRequires = null;
private void EnsureTypeContractRuntime ()
{
if (this.typeContractsRuntime == null) {
// namespace System.Diagnostics.Contracts {
// [CompilerGenerated]
// private static class __ContractsRuntime {
// }
// }
// Create type
TypeReference typeObject = this.module.Import (typeof (object));
TypeDefinition type = new TypeDefinition ("__ContractsRuntime", Namespace,
TypeAttributes.Abstract | TypeAttributes.Sealed | TypeAttributes.NotPublic | TypeAttributes.AnsiClass | TypeAttributes.AutoClass, // | TypeAttributes.BeforeFieldInit,
typeObject);
this.module.Types.Add (type);
// Attach custom attributes
var attrCompilerGeneratedCons = typeof (CompilerGeneratedAttribute).GetConstructor (Type.EmptyTypes);
CustomAttribute attrCompilerGenerated = new CustomAttribute (this.module.Import (attrCompilerGeneratedCons));
type.CustomAttributes.Add (attrCompilerGenerated);
// Store type
this.typeContractsRuntime = type;
}
}
private void EnsureTypeContractException ()
{
if (this.options.ThrowOnFailure && this.typeContractException == null) {
// [CompilerGenerated]
// private class ContractException : Exception {
// internal ContractException(ContractFailureKind kind, string usermsg, string condition, Exception inner)
// : base(failure, inner)
// {
// }
// }
// Prepare type references
TypeReference typeVoid = this.module.Import (typeof (void));
TypeReference typeContractFailureKind = this.module.Import (typeof (ContractFailureKind));
TypeReference typeString = this.module.Import (typeof (string));
TypeReference typeException = this.module.Import (typeof (Exception));
// Create type
TypeDefinition type = new TypeDefinition ("ContractException", Namespace,
TypeAttributes.NestedPrivate | TypeAttributes.AnsiClass | TypeAttributes.AutoClass, typeException);
//this.typeContractsRuntime.NestedTypes.Add (type);
this.module.Types.Add(type);
// Create constructor
MethodDefinition cons = new MethodDefinition (".ctor",
MethodAttributes.Assembly | MethodAttributes.SpecialName | MethodAttributes.RTSpecialName, typeVoid);
cons.Parameters.Add (new ParameterDefinition ("kind", ParameterAttributes.None, typeContractFailureKind));
cons.Parameters.Add (new ParameterDefinition ("failure", ParameterAttributes.None, typeString));
cons.Parameters.Add (new ParameterDefinition ("usermsg", ParameterAttributes.None, typeString));
cons.Parameters.Add (new ParameterDefinition ("condition", ParameterAttributes.None, typeString));
cons.Parameters.Add (new ParameterDefinition ("inner", ParameterAttributes.None, typeException));
var il = cons.Body.GetILProcessor ();
il.Emit (OpCodes.Ldarg_0);
il.Emit (OpCodes.Ldarg_2);
il.Emit (OpCodes.Ldarg_S, cons.Parameters [4]);
MethodReference mExceptionCons = this.module.Import (typeof (Exception).GetConstructor (new [] { typeof (string), typeof (Exception) }));
il.Emit (OpCodes.Call, mExceptionCons);
il.Emit (OpCodes.Ret);
type.Methods.Add (cons);
// Attach custom attributes
var attrCompilerGeneratedCons = typeof (CompilerGeneratedAttribute).GetConstructor (Type.EmptyTypes);
CustomAttribute attrCompilerGenerated = new CustomAttribute (this.module.Import (attrCompilerGeneratedCons));
type.CustomAttributes.Add (attrCompilerGenerated);
// Store constructor and type
this.methodContractExceptionCons = cons;
this.typeContractException = type;
}
}
private void EnsureMethodTriggerFailure ()
{
if (this.methodTriggerFailure == null) {
// if the ThrowOnFailure option is true, then:
// internal static void TriggerFailure(ContractFailureKind kind, string message, string userMessage, string conditionText, Exception inner)
// {
// throw new ContractException(kind, message, userMessage, conditionText, inner);
// }
// if the ThrowOnFailure option is false, then:
// internal static void TriggerFailure(ContractFailureKind kind, string message, string userMessage, string conditionText, Exception inner)
// {
// Debug.Fail(message, userMessage);
// }
// Prepare type references
TypeReference typeVoid = this.module.Import (typeof (void));
TypeReference typeContractFailureKind = this.module.Import (typeof (ContractFailureKind));
TypeReference typeString = this.module.Import (typeof (string));
TypeReference typeException = this.module.Import (typeof (Exception));
// Create method
MethodDefinition method = new MethodDefinition ("TriggerFailure",
MethodAttributes.Assembly | MethodAttributes.Static, typeVoid);
method.Parameters.Add (new ParameterDefinition ("kind", ParameterAttributes.None, typeContractFailureKind));
method.Parameters.Add (new ParameterDefinition ("message", ParameterAttributes.None, typeString));
method.Parameters.Add (new ParameterDefinition ("userMessage", ParameterAttributes.None, typeString));
method.Parameters.Add (new ParameterDefinition ("conditionText", ParameterAttributes.None, typeString));
method.Parameters.Add (new ParameterDefinition ("inner", ParameterAttributes.None, typeException));
var il = method.Body.GetILProcessor ();
if (this.options.ThrowOnFailure) {
il.Emit (OpCodes.Ldarg_0);
il.Emit (OpCodes.Ldarg_1);
il.Emit (OpCodes.Ldarg_2);
il.Emit (OpCodes.Ldarg_3);
il.Emit (OpCodes.Ldarg_S, method.Parameters [4]);
il.Emit (OpCodes.Newobj, this.methodContractExceptionCons);
il.Emit (OpCodes.Throw);
} else {
var mDebugFail = typeof (Debug).GetMethod ("Fail", new [] { typeof (string), typeof(string) });
MethodReference methodDebugFail = this.module.Import (mDebugFail);
il.Emit (OpCodes.Ldarg_1);
il.Emit (OpCodes.Ldarg_2);
il.Emit (OpCodes.Call, methodDebugFail);
il.Emit (OpCodes.Ret);
}
this.typeContractsRuntime.Methods.Add (method);
this.methodTriggerFailure = method;
}
}
private void EnsureMethodReportFailure ()
{
if (this.methodReportFailure == null) {
// internal static void ReportFailure(ContractFailureKind kind, string message, string conditionText, Exception inner)
// {
// string s = ContractHelper.RaiseContractFailedEvent(kind, message, conditionText, inner);
// if (s != null) {
// TriggerFailure(kind, s, message, conditionText, inner);
// }
// }
// Prepare type references
TypeReference typeVoid = this.module.Import (typeof (void));
TypeReference typeContractFailureKind = this.module.Import (typeof (ContractFailureKind));
TypeReference typeString = this.module.Import (typeof (string));
TypeReference typeException = this.module.Import (typeof (Exception));
#if NET_4_5
var helper = typeof (ContractHelper);
#else
var helper = typeof (System.Diagnostics.Contracts.Internal.ContractHelper);
#endif
MethodReference mRaiseContractFailedEvent = this.module.Import (helper.GetMethod ("RaiseContractFailedEvent"));
// Create method
MethodDefinition method = new MethodDefinition ("ReportFailure",
MethodAttributes.Assembly | MethodAttributes.Static, typeVoid);
method.Parameters.Add (new ParameterDefinition ("kind", ParameterAttributes.None, typeContractFailureKind));
method.Parameters.Add (new ParameterDefinition ("message", ParameterAttributes.None, typeString));
method.Parameters.Add (new ParameterDefinition ("conditionText", ParameterAttributes.None, typeString));
method.Parameters.Add (new ParameterDefinition ("inner", ParameterAttributes.None, typeException));
VariableDefinition vMsg = new VariableDefinition ("sMsg", typeString);
method.Body.Variables.Add (vMsg);
method.Body.InitLocals = true;
var il = method.Body.GetILProcessor ();
il.Emit (OpCodes.Ldarg_0);
il.Emit (OpCodes.Ldarg_1);
il.Emit (OpCodes.Ldarg_2);
il.Emit (OpCodes.Ldarg_3);
il.Emit (OpCodes.Call, mRaiseContractFailedEvent);
il.Emit (OpCodes.Stloc_0);
il.Emit (OpCodes.Ldloc_0);
var instRet = il.Create (OpCodes.Ret);
il.Emit (OpCodes.Brfalse_S, instRet);
il.Emit (OpCodes.Ldarg_0);
il.Emit (OpCodes.Ldloc_0);
il.Emit (OpCodes.Ldarg_1);
il.Emit (OpCodes.Ldarg_2);
il.Emit (OpCodes.Ldarg_3);
il.Emit (OpCodes.Call, this.methodTriggerFailure);
il.Append (instRet);
this.typeContractsRuntime.Methods.Add (method);
this.methodReportFailure = method;
}
}
private void EnsureGlobal ()
{
this.EnsureTypeContractRuntime ();
this.EnsureTypeContractException ();
this.EnsureMethodTriggerFailure ();
this.EnsureMethodReportFailure ();
}
public MethodDefinition GetRequires ()
{
this.EnsureGlobal ();
if (this.methodRequires == null) {
// [DebuggerNonUserCode]
// [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
// internal static void Requires(bool condition, string message, string conditionText)
// {
// if (!condition) {
// ReportFailure(ContractFailureKind.Precondition, message, conditionText, null);
// }
// }
// Prepare type references
TypeReference typeVoid = this.module.Import (typeof (void));
TypeReference typeBoolean = this.module.Import (typeof (bool));
TypeReference typeString = this.module.Import (typeof (string));
// Create method
MethodDefinition method = new MethodDefinition ("Requires",
MethodAttributes.Assembly | MethodAttributes.Static, typeVoid);
method.Parameters.Add (new ParameterDefinition ("condition", ParameterAttributes.None, typeBoolean));
method.Parameters.Add (new ParameterDefinition ("message", ParameterAttributes.None, typeString));
method.Parameters.Add (new ParameterDefinition ("conditionText", ParameterAttributes.None, typeString));
var il = method.Body.GetILProcessor ();
il.Emit (OpCodes.Ldarg_0);
var instRet = il.Create(OpCodes.Ret);
il.Emit (OpCodes.Brtrue_S, instRet);
il.Emit (OpCodes.Ldc_I4_0); // Assumes ContractFailureKind.Precondition == 0
il.Emit (OpCodes.Ldarg_1);
il.Emit (OpCodes.Ldarg_2);
il.Emit (OpCodes.Ldnull);
il.Emit (OpCodes.Call, this.methodReportFailure);
il.Append (instRet);
this.typeContractsRuntime.Methods.Add (method);
// Attach custom attributes
var attrDebugNonUserCodeCons = typeof (DebuggerNonUserCodeAttribute).GetConstructor (Type.EmptyTypes);
CustomAttribute attrDebugNonUserCode = new CustomAttribute (this.module.Import (attrDebugNonUserCodeCons));
method.CustomAttributes.Add (attrDebugNonUserCode);
var attrReliabilityContractCons = typeof (ReliabilityContractAttribute).GetConstructor (new [] { typeof (Consistency), typeof (Cer) });
// Blob for attribute: new ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)
byte [] blob = new byte [] { 1, 0, 3, 0, 0, 0, 1, 0, 0, 0 };
CustomAttribute attrReliabilityContract = new CustomAttribute (this.module.Import (attrReliabilityContractCons), blob);
method.CustomAttributes.Add (attrReliabilityContract);
// Store method
this.methodRequires = method;
}
return this.methodRequires;
}
}
}
|