This repository has been archived by the owner on Jan 23, 2023. It is now read-only.
/
StackTrace.cs
421 lines (365 loc) · 15.7 KB
/
StackTrace.cs
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
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Collections;
using System.Collections.Generic;
using System.Globalization;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Text;
namespace System.Diagnostics
{
/// <summary>
/// Class which represents a description of a stack trace
/// There is no good reason for the methods of this class to be virtual.
/// </summary>
public partial class StackTrace
{
public const int METHODS_TO_SKIP = 0;
private int _numOfFrames;
private int _methodsToSkip;
/// <summary>
/// Stack frames comprising this stack trace.
/// </summary>
private StackFrame?[]? _stackFrames;
/// <summary>
/// Constructs a stack trace from the current location.
/// </summary>
public StackTrace()
{
InitializeForCurrentThread(METHODS_TO_SKIP, false);
}
/// <summary>
/// Constructs a stack trace from the current location.
/// </summary>
public StackTrace(bool fNeedFileInfo)
{
InitializeForCurrentThread(METHODS_TO_SKIP, fNeedFileInfo);
}
/// <summary>
/// Constructs a stack trace from the current location, in a caller's
/// frame
/// </summary>
public StackTrace(int skipFrames)
{
if (skipFrames < 0)
throw new ArgumentOutOfRangeException(nameof(skipFrames),
SR.ArgumentOutOfRange_NeedNonNegNum);
InitializeForCurrentThread(skipFrames + METHODS_TO_SKIP, false);
}
/// <summary>
/// Constructs a stack trace from the current location, in a caller's
/// frame
/// </summary>
public StackTrace(int skipFrames, bool fNeedFileInfo)
{
if (skipFrames < 0)
throw new ArgumentOutOfRangeException(nameof(skipFrames),
SR.ArgumentOutOfRange_NeedNonNegNum);
InitializeForCurrentThread(skipFrames + METHODS_TO_SKIP, fNeedFileInfo);
}
/// <summary>
/// Constructs a stack trace from the current location.
/// </summary>
public StackTrace(Exception e)
{
if (e == null)
throw new ArgumentNullException(nameof(e));
InitializeForException(e, METHODS_TO_SKIP, false);
}
/// <summary>
/// Constructs a stack trace from the current location.
/// </summary>
public StackTrace(Exception e, bool fNeedFileInfo)
{
if (e == null)
throw new ArgumentNullException(nameof(e));
InitializeForException(e, METHODS_TO_SKIP, fNeedFileInfo);
}
/// <summary>
/// Constructs a stack trace from the current location, in a caller's
/// frame
/// </summary>
public StackTrace(Exception e, int skipFrames)
{
if (e == null)
throw new ArgumentNullException(nameof(e));
if (skipFrames < 0)
throw new ArgumentOutOfRangeException(nameof(skipFrames),
SR.ArgumentOutOfRange_NeedNonNegNum);
InitializeForException(e, skipFrames + METHODS_TO_SKIP, false);
}
/// <summary>
/// Constructs a stack trace from the current location, in a caller's
/// frame
/// </summary>
public StackTrace(Exception e, int skipFrames, bool fNeedFileInfo)
{
if (e == null)
throw new ArgumentNullException(nameof(e));
if (skipFrames < 0)
throw new ArgumentOutOfRangeException(nameof(skipFrames),
SR.ArgumentOutOfRange_NeedNonNegNum);
InitializeForException(e, skipFrames + METHODS_TO_SKIP, fNeedFileInfo);
}
/// <summary>
/// Constructs a "fake" stack trace, just containing a single frame.
/// Does not have the overhead of a full stack trace.
/// </summary>
public StackTrace(StackFrame frame)
{
_stackFrames = new StackFrame[] { frame };
_numOfFrames = 1;
}
/// <summary>
/// Property to get the number of frames in the stack trace
/// </summary>
public virtual int FrameCount
{
get { return _numOfFrames; }
}
/// <summary>
/// Returns a given stack frame. Stack frames are numbered starting at
/// zero, which is the last stack frame pushed.
/// </summary>
public virtual StackFrame? GetFrame(int index)
{
if (_stackFrames != null && index < _numOfFrames && index >= 0)
return _stackFrames[index + _methodsToSkip];
return null;
}
/// <summary>
/// Returns an array of all stack frames for this stacktrace.
/// The array is ordered and sized such that GetFrames()[i] == GetFrame(i)
/// The nth element of this array is the same as GetFrame(n).
/// The length of the array is the same as FrameCount.
/// </summary>
public virtual StackFrame?[] GetFrames()
{
if (_stackFrames == null || _numOfFrames <= 0)
return Array.Empty<StackFrame>();
// We have to return a subset of the array. Unfortunately this
// means we have to allocate a new array and copy over.
StackFrame[] array = new StackFrame[_numOfFrames];
Array.Copy(_stackFrames, _methodsToSkip, array, 0, _numOfFrames);
return array;
}
/// <summary>
/// Builds a readable representation of the stack trace
/// </summary>
public override string ToString()
{
// Include a trailing newline for backwards compatibility
return ToString(TraceFormat.TrailingNewLine);
}
/// <summary>
/// TraceFormat is used to specify options for how the
/// string-representation of a StackTrace should be generated.
/// </summary>
internal enum TraceFormat
{
Normal,
TrailingNewLine, // include a trailing new line character
}
#if !CORERT
/// <summary>
/// Builds a readable representation of the stack trace, specifying
/// the format for backwards compatibility.
/// </summary>
internal string ToString(TraceFormat traceFormat)
{
string word_At = SR.Word_At;
string inFileLineNum = SR.StackTrace_InFileLineNumber;
bool fFirstFrame = true;
StringBuilder sb = new StringBuilder(255);
for (int iFrameIndex = 0; iFrameIndex < _numOfFrames; iFrameIndex++)
{
StackFrame? sf = GetFrame(iFrameIndex);
MethodBase? mb = sf?.GetMethod();
if (mb != null && (ShowInStackTrace(mb) ||
(iFrameIndex == _numOfFrames - 1))) // Don't filter last frame
{
// We want a newline at the end of every line except for the last
if (fFirstFrame)
fFirstFrame = false;
else
sb.Append(Environment.NewLine);
sb.AppendFormat(CultureInfo.InvariantCulture, " {0} ", word_At);
bool isAsync = false;
Type? declaringType = mb.DeclaringType;
string methodName = mb.Name;
bool methodChanged = false;
if (declaringType != null && declaringType.IsDefined(typeof(CompilerGeneratedAttribute), inherit: false))
{
isAsync = typeof(IAsyncStateMachine).IsAssignableFrom(declaringType);
if (isAsync || typeof(IEnumerator).IsAssignableFrom(declaringType))
{
methodChanged = TryResolveStateMachineMethod(ref mb, out declaringType);
}
}
// if there is a type (non global method) print it
// ResolveStateMachineMethod may have set declaringType to null
if (declaringType != null)
{
// Append t.FullName, replacing '+' with '.'
string fullName = declaringType.FullName!;
for (int i = 0; i < fullName.Length; i++)
{
char ch = fullName[i];
sb.Append(ch == '+' ? '.' : ch);
}
sb.Append('.');
}
sb.Append(mb.Name);
// deal with the generic portion of the method
if (mb is MethodInfo mi && mi.IsGenericMethod)
{
Type[] typars = mi.GetGenericArguments();
sb.Append('[');
int k = 0;
bool fFirstTyParam = true;
while (k < typars.Length)
{
if (fFirstTyParam == false)
sb.Append(',');
else
fFirstTyParam = false;
sb.Append(typars[k].Name);
k++;
}
sb.Append(']');
}
ParameterInfo[]? pi = null;
try
{
pi = mb.GetParameters();
}
catch
{
// The parameter info cannot be loaded, so we don't
// append the parameter list.
}
if (pi != null)
{
// arguments printing
sb.Append('(');
bool fFirstParam = true;
for (int j = 0; j < pi.Length; j++)
{
if (fFirstParam == false)
sb.Append(", ");
else
fFirstParam = false;
string typeName = "<UnknownType>";
if (pi[j].ParameterType != null)
typeName = pi[j].ParameterType.Name;
sb.Append(typeName);
sb.Append(' ');
sb.Append(pi[j].Name);
}
sb.Append(')');
}
if (methodChanged)
{
// Append original method name e.g. +MoveNext()
sb.Append('+');
sb.Append(methodName);
sb.Append('(').Append(')');
}
// source location printing
if (sf!.GetILOffset() != -1)
{
// If we don't have a PDB or PDB-reading is disabled for the module,
// then the file name will be null.
string? fileName = sf.GetFileName();
if (fileName != null)
{
// tack on " in c:\tmp\MyFile.cs:line 5"
sb.Append(' ');
sb.AppendFormat(CultureInfo.InvariantCulture, inFileLineNum, fileName, sf.GetFileLineNumber());
}
}
// Skip EDI boundary for async
if (sf.IsLastFrameFromForeignExceptionStackTrace && !isAsync)
{
sb.Append(Environment.NewLine);
sb.Append(SR.Exception_EndStackTraceFromPreviousThrow);
}
}
}
if (traceFormat == TraceFormat.TrailingNewLine)
sb.Append(Environment.NewLine);
return sb.ToString();
}
#endif // !CORERT
private static bool ShowInStackTrace(MethodBase mb)
{
Debug.Assert(mb != null);
if ((mb.MethodImplementationFlags & MethodImplAttributes.AggressiveInlining) != 0)
{
// Aggressive Inlines won't normally show in the StackTrace; however for Tier0 Jit and
// cross-assembly AoT/R2R these inlines will be blocked until Tier1 Jit re-Jits
// them when they will inline. We don't show them in the StackTrace to bring consistency
// between this first-pass asm and fully optimized asm.
return false;
}
if (mb.IsDefined(typeof(StackTraceHiddenAttribute), inherit: false))
{
// Don't show where StackTraceHidden is applied to the method.
return false;
}
Type? declaringType = mb.DeclaringType;
// Methods don't always have containing types, for example dynamic RefEmit generated methods.
if (declaringType != null &&
declaringType.IsDefined(typeof(StackTraceHiddenAttribute), inherit: false))
{
// Don't show where StackTraceHidden is applied to the containing Type of the method.
return false;
}
return true;
}
private static bool TryResolveStateMachineMethod(ref MethodBase method, out Type declaringType)
{
Debug.Assert(method != null);
Debug.Assert(method.DeclaringType != null);
declaringType = method.DeclaringType;
Type? parentType = declaringType.DeclaringType;
if (parentType == null)
{
return false;
}
MethodInfo[]? methods = parentType.GetMethods(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.Instance | BindingFlags.DeclaredOnly);
if (methods == null)
{
return false;
}
foreach (MethodInfo candidateMethod in methods)
{
IEnumerable<StateMachineAttribute>? attributes = candidateMethod.GetCustomAttributes<StateMachineAttribute>(inherit: false);
if (attributes == null)
{
continue;
}
bool foundAttribute = false, foundIteratorAttribute = false;
foreach (StateMachineAttribute asma in attributes)
{
if (asma.StateMachineType == declaringType)
{
foundAttribute = true;
foundIteratorAttribute |= asma is IteratorStateMachineAttribute || asma is AsyncIteratorStateMachineAttribute;
}
}
if (foundAttribute)
{
// If this is an iterator (sync or async), mark the iterator as changed, so it gets the + annotation
// of the original method. Non-iterator async state machines resolve directly to their builder methods
// so aren't marked as changed.
method = candidateMethod;
declaringType = candidateMethod.DeclaringType!;
return foundIteratorAttribute;
}
}
return false;
}
}
}