summaryrefslogtreecommitdiffstats
path: root/tools/profiler/lul/LulCommonExt.h
blob: 99a9676838e4d210e99ce72300a76f718977e19b (plain)
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
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */

// Copyright (c) 2006, 2010, 2012, 2013 Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com>

// module.h: Define google_breakpad::Module. A Module holds debugging
// information, and can write that information out as a Breakpad
// symbol file.


//  (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
//  Copyright (c) 2001, 2002 Peter Dimov
//
//  Permission to copy, use, modify, sell and distribute this software
//  is granted provided this copyright notice appears in all copies.
//  This software is provided "as is" without express or implied
//  warranty, and with no claim as to its suitability for any purpose.
//
//  See http://www.boost.org/libs/smart_ptr/scoped_ptr.htm for documentation.
//


// This file is derived from the following files in
// toolkit/crashreporter/google-breakpad:
//   src/common/unique_string.h
//   src/common/scoped_ptr.h
//   src/common/module.h

// External interface for the "Common" component of LUL.

#ifndef LulCommonExt_h
#define LulCommonExt_h

#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>

#include <string>
#include <map>
#include <vector>
#include <cstddef>            // for std::ptrdiff_t

#include "mozilla/Assertions.h"

namespace lul {

using std::string;
using std::map;


////////////////////////////////////////////////////////////////
// UniqueString
//

// Abstract type
class UniqueString;

// Get the contained C string (debugging only)
const char* FromUniqueString(const UniqueString*);

// Is the given string empty (that is, "") ?
bool IsEmptyUniqueString(const UniqueString*);


////////////////////////////////////////////////////////////////
// UniqueStringUniverse
//

// All UniqueStrings live in some specific UniqueStringUniverse.
class UniqueStringUniverse {
public:
  UniqueStringUniverse() {}
  ~UniqueStringUniverse();
  // Convert a |string| to a UniqueString, that lives in this universe.
  const UniqueString* ToUniqueString(string str);
private:
  map<string, UniqueString*> map_;
};


////////////////////////////////////////////////////////////////
// GUID
//

typedef struct {
  uint32_t data1;
  uint16_t data2;
  uint16_t data3;
  uint8_t  data4[8];
} MDGUID;  // GUID

typedef MDGUID GUID;


////////////////////////////////////////////////////////////////
// scoped_ptr
//

//  scoped_ptr mimics a built-in pointer except that it guarantees deletion
//  of the object pointed to, either on destruction of the scoped_ptr or via
//  an explicit reset(). scoped_ptr is a simple solution for simple needs;
//  use shared_ptr or std::auto_ptr if your needs are more complex.

//  *** NOTE ***
//  If your scoped_ptr is a class member of class FOO pointing to a
//  forward declared type BAR (as shown below), then you MUST use a non-inlined
//  version of the destructor.  The destructor of a scoped_ptr (called from
//  FOO's destructor) must have a complete definition of BAR in order to
//  destroy it.  Example:
//
//  -- foo.h --
//  class BAR;
//
//  class FOO {
//   public:
//    FOO();
//    ~FOO();  // Required for sources that instantiate class FOO to compile!
//
//   private:
//    scoped_ptr<BAR> bar_;
//  };
//
//  -- foo.cc --
//  #include "foo.h"
//  FOO::~FOO() {} // Empty, but must be non-inlined to FOO's class definition.

//  scoped_ptr_malloc added by Google
//  When one of these goes out of scope, instead of doing a delete or
//  delete[], it calls free().  scoped_ptr_malloc<char> is likely to see
//  much more use than any other specializations.

//  release() added by Google
//  Use this to conditionally transfer ownership of a heap-allocated object
//  to the caller, usually on method success.

template <typename T>
class scoped_ptr {
 private:

  T* ptr;

  scoped_ptr(scoped_ptr const &);
  scoped_ptr & operator=(scoped_ptr const &);

 public:

  typedef T element_type;

  explicit scoped_ptr(T* p = 0): ptr(p) {}

  ~scoped_ptr() {
    delete ptr;
  }

  void reset(T* p = 0) {
    if (ptr != p) {
      delete ptr;
      ptr = p;
    }
  }

  T& operator*() const {
    MOZ_ASSERT(ptr != 0);
    return *ptr;
  }

  T* operator->() const  {
    MOZ_ASSERT(ptr != 0);
    return ptr;
  }

  bool operator==(T* p) const {
    return ptr == p;
  }

  bool operator!=(T* p) const {
    return ptr != p;
  }

  T* get() const  {
    return ptr;
  }

  void swap(scoped_ptr & b) {
    T* tmp = b.ptr;
    b.ptr = ptr;
    ptr = tmp;
  }

  T* release() {
    T* tmp = ptr;
    ptr = 0;
    return tmp;
  }

 private:

  // no reason to use these: each scoped_ptr should have its own object
  template <typename U> bool operator==(scoped_ptr<U> const& p) const;
  template <typename U> bool operator!=(scoped_ptr<U> const& p) const;
};

template<typename T> inline
void swap(scoped_ptr<T>& a, scoped_ptr<T>& b) {
  a.swap(b);
}

template<typename T> inline
bool operator==(T* p, const scoped_ptr<T>& b) {
  return p == b.get();
}

template<typename T> inline
bool operator!=(T* p, const scoped_ptr<T>& b) {
  return p != b.get();
}

//  scoped_array extends scoped_ptr to arrays. Deletion of the array pointed to
//  is guaranteed, either on destruction of the scoped_array or via an explicit
//  reset(). Use shared_array or std::vector if your needs are more complex.

template<typename T>
class scoped_array {
 private:

  T* ptr;

  scoped_array(scoped_array const &);
  scoped_array & operator=(scoped_array const &);

 public:

  typedef T element_type;

  explicit scoped_array(T* p = 0) : ptr(p) {}

  ~scoped_array() {
    delete[] ptr;
  }

  void reset(T* p = 0) {
    if (ptr != p) {
      delete [] ptr;
      ptr = p;
    }
  }

  T& operator[](std::ptrdiff_t i) const {
    MOZ_ASSERT(ptr != 0);
    MOZ_ASSERT(i >= 0);
    return ptr[i];
  }

  bool operator==(T* p) const {
    return ptr == p;
  }

  bool operator!=(T* p) const {
    return ptr != p;
  }

  T* get() const {
    return ptr;
  }

  void swap(scoped_array & b) {
    T* tmp = b.ptr;
    b.ptr = ptr;
    ptr = tmp;
  }

  T* release() {
    T* tmp = ptr;
    ptr = 0;
    return tmp;
  }

 private:

  // no reason to use these: each scoped_array should have its own object
  template <typename U> bool operator==(scoped_array<U> const& p) const;
  template <typename U> bool operator!=(scoped_array<U> const& p) const;
};

template<class T> inline
void swap(scoped_array<T>& a, scoped_array<T>& b) {
  a.swap(b);
}

template<typename T> inline
bool operator==(T* p, const scoped_array<T>& b) {
  return p == b.get();
}

template<typename T> inline
bool operator!=(T* p, const scoped_array<T>& b) {
  return p != b.get();
}


// This class wraps the c library function free() in a class that can be
// passed as a template argument to scoped_ptr_malloc below.
class ScopedPtrMallocFree {
 public:
  inline void operator()(void* x) const {
    free(x);
  }
};

// scoped_ptr_malloc<> is similar to scoped_ptr<>, but it accepts a
// second template argument, the functor used to free the object.

template<typename T, typename FreeProc = ScopedPtrMallocFree>
class scoped_ptr_malloc {
 private:

  T* ptr;

  scoped_ptr_malloc(scoped_ptr_malloc const &);
  scoped_ptr_malloc & operator=(scoped_ptr_malloc const &);

 public:

  typedef T element_type;

  explicit scoped_ptr_malloc(T* p = 0): ptr(p) {}

  ~scoped_ptr_malloc() {
    free_((void*) ptr);
  }

  void reset(T* p = 0) {
    if (ptr != p) {
      free_((void*) ptr);
      ptr = p;
    }
  }

  T& operator*() const {
    MOZ_ASSERT(ptr != 0);
    return *ptr;
  }

  T* operator->() const {
    MOZ_ASSERT(ptr != 0);
    return ptr;
  }

  bool operator==(T* p) const {
    return ptr == p;
  }

  bool operator!=(T* p) const {
    return ptr != p;
  }

  T* get() const {
    return ptr;
  }

  void swap(scoped_ptr_malloc & b) {
    T* tmp = b.ptr;
    b.ptr = ptr;
    ptr = tmp;
  }

  T* release() {
    T* tmp = ptr;
    ptr = 0;
    return tmp;
  }

 private:

  // no reason to use these: each scoped_ptr_malloc should have its own object
  template <typename U, typename GP>
  bool operator==(scoped_ptr_malloc<U, GP> const& p) const;
  template <typename U, typename GP>
  bool operator!=(scoped_ptr_malloc<U, GP> const& p) const;

  static FreeProc const free_;
};

template<typename T, typename FP>
FP const scoped_ptr_malloc<T,FP>::free_ = FP();

template<typename T, typename FP> inline
void swap(scoped_ptr_malloc<T,FP>& a, scoped_ptr_malloc<T,FP>& b) {
  a.swap(b);
}

template<typename T, typename FP> inline
bool operator==(T* p, const scoped_ptr_malloc<T,FP>& b) {
  return p == b.get();
}

template<typename T, typename FP> inline
bool operator!=(T* p, const scoped_ptr_malloc<T,FP>& b) {
  return p != b.get();
}


////////////////////////////////////////////////////////////////
// Module
//

// A Module represents the contents of a module, and supports methods
// for adding information produced by parsing STABS or DWARF data
// --- possibly both from the same file --- and then writing out the
// unified contents as a Breakpad-format symbol file.
class Module {
public:
  // The type of addresses and sizes in a symbol table.
  typedef uint64_t Address;

  // Representation of an expression.  This can either be a postfix
  // expression, in which case it is stored as a string, or a simple
  // expression of the form (identifier + imm) or *(identifier + imm).
  // It can also be invalid (denoting "no value").
  enum ExprHow {
    kExprInvalid = 1,
    kExprPostfix,
    kExprSimple,
    kExprSimpleMem
  };

  struct Expr {
    // Construct a simple-form expression
    Expr(const UniqueString* ident, long offset, bool deref) {
      if (IsEmptyUniqueString(ident)) {
        Expr();
      } else {
        postfix_ = "";
        ident_ = ident;
        offset_ = offset;
        how_ = deref ? kExprSimpleMem : kExprSimple;
      }
    }

    // Construct an invalid expression
    Expr() {
      postfix_ = "";
      ident_ = nullptr;
      offset_ = 0;
      how_ = kExprInvalid;
    }

    // Return the postfix expression string, either directly,
    // if this is a postfix expression, or by synthesising it
    // for a simple expression.
    std::string getExprPostfix() const {
      switch (how_) {
        case kExprPostfix:
          return postfix_;
        case kExprSimple:
        case kExprSimpleMem: {
          char buf[40];
          sprintf(buf, " %ld %c%s", labs(offset_), offset_ < 0 ? '-' : '+',
                                    how_ == kExprSimple ? "" : " ^");
          return std::string(FromUniqueString(ident_)) + std::string(buf);
        }
        case kExprInvalid:
        default:
          MOZ_ASSERT(0 && "getExprPostfix: invalid Module::Expr type");
          return "Expr::genExprPostfix: kExprInvalid";
      }
    }

    // The identifier that gives the starting value for simple expressions.
    const UniqueString* ident_;
    // The offset to add for simple expressions.
    long        offset_;
    // The Postfix expression string to evaluate for non-simple expressions.
    std::string postfix_;
    // The operation expressed by this expression.
    ExprHow     how_;
  };

  // A map from register names to expressions that recover
  // their values. This can represent a complete set of rules to
  // follow at some address, or a set of changes to be applied to an
  // extant set of rules.
  // NOTE! there are two completely different types called RuleMap.  This
  // is one of them.
  typedef std::map<const UniqueString*, Expr> RuleMap;

  // A map from addresses to RuleMaps, representing changes that take
  // effect at given addresses.
  typedef std::map<Address, RuleMap> RuleChangeMap;

  // A range of 'STACK CFI' stack walking information. An instance of
  // this structure corresponds to a 'STACK CFI INIT' record and the
  // subsequent 'STACK CFI' records that fall within its range.
  struct StackFrameEntry {
    // The starting address and number of bytes of machine code this
    // entry covers.
    Address address, size;

    // The initial register recovery rules, in force at the starting
    // address.
    RuleMap initial_rules;

    // A map from addresses to rule changes. To find the rules in
    // force at a given address, start with initial_rules, and then
    // apply the changes given in this map for all addresses up to and
    // including the address you're interested in.
    RuleChangeMap rule_changes;
  };

  // Create a new module with the given name, operating system,
  // architecture, and ID string.
  Module(const std::string &name, const std::string &os,
         const std::string &architecture, const std::string &id);
  ~Module();

private:

  // Module header entries.
  std::string name_, os_, architecture_, id_;
};


}  // namespace lul

#endif // LulCommonExt_h