summaryrefslogtreecommitdiff
path: root/absl/base/dynamic_annotations.h
blob: 880cbf6e926ba7ac256e41d47ab0b93ee65771d9 (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
// Copyright 2017 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// This file defines dynamic annotations for use with dynamic analysis tool
// such as valgrind, PIN, etc.
//
// Dynamic annotation is a source code annotation that affects the generated
// code (that is, the annotation is not a comment). Each such annotation is
// attached to a particular instruction and/or to a particular object (address)
// in the program.
//
// The annotations that should be used by users are macros in all upper-case
// (e.g., ABSL_ANNOTATE_THREAD_NAME).
//
// Actual implementation of these macros may differ depending on the dynamic
// analysis tool being used.
//
// This file supports the following configurations:
// - Dynamic Annotations enabled (with static thread-safety warnings disabled).
//   In this case, macros expand to functions implemented by Thread Sanitizer,
//   when building with TSan. When not provided an external implementation,
//   dynamic_annotations.cc provides no-op implementations.
//
// - Static Clang thread-safety warnings enabled.
//   When building with a Clang compiler that supports thread-safety warnings,
//   a subset of annotations can be statically-checked at compile-time. We
//   expand these macros to static-inline functions that can be analyzed for
//   thread-safety, but afterwards elided when building the final binary.
//
// - All annotations are disabled.
//   If neither Dynamic Annotations nor Clang thread-safety warnings are
//   enabled, then all annotation-macros expand to empty.

#ifndef ABSL_BASE_DYNAMIC_ANNOTATIONS_H_
#define ABSL_BASE_DYNAMIC_ANNOTATIONS_H_

#include <stddef.h>

#include "absl/base/attributes.h"
#include "absl/base/config.h"
#ifdef __cplusplus
#include "absl/base/macros.h"
#endif

// TODO(rogeeff): Remove after the backward compatibility period.
#include "absl/base/internal/dynamic_annotations.h"  // IWYU pragma: export

// -------------------------------------------------------------------------
// Decide which features are enabled.

#ifdef ABSL_HAVE_THREAD_SANITIZER

#define ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED 1
#define ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED 1
#define ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED 1
#define ABSL_INTERNAL_ANNOTALYSIS_ENABLED 0
#define ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED 1

#else

#define ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED 0
#define ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED 0
#define ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED 0

// Clang provides limited support for static thread-safety analysis through a
// feature called Annotalysis. We configure macro-definitions according to
// whether Annotalysis support is available. When running in opt-mode, GCC
// will issue a warning, if these attributes are compiled. Only include them
// when compiling using Clang.

#if defined(__clang__)
#define ABSL_INTERNAL_ANNOTALYSIS_ENABLED 1
#if !defined(SWIG)
#define ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED 1
#endif
#else
#define ABSL_INTERNAL_ANNOTALYSIS_ENABLED 0
#endif

// Read/write annotations are enabled in Annotalysis mode; disabled otherwise.
#define ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED \
  ABSL_INTERNAL_ANNOTALYSIS_ENABLED

#endif  // ABSL_HAVE_THREAD_SANITIZER

#ifdef __cplusplus
#define ABSL_INTERNAL_BEGIN_EXTERN_C extern "C" {
#define ABSL_INTERNAL_END_EXTERN_C }  // extern "C"
#define ABSL_INTERNAL_GLOBAL_SCOPED(F) ::F
#define ABSL_INTERNAL_STATIC_INLINE inline
#else
#define ABSL_INTERNAL_BEGIN_EXTERN_C  // empty
#define ABSL_INTERNAL_END_EXTERN_C    // empty
#define ABSL_INTERNAL_GLOBAL_SCOPED(F) F
#define ABSL_INTERNAL_STATIC_INLINE static inline
#endif

// -------------------------------------------------------------------------
// Define race annotations.

#if ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED == 1
// Some of the symbols used in this section (e.g. AnnotateBenignRaceSized) are
// defined by the compiler-based santizer implementation, not by the Abseil
// library. Therefore they do not use ABSL_INTERNAL_C_SYMBOL.

// -------------------------------------------------------------
// Annotations that suppress errors. It is usually better to express the
// program's synchronization using the other annotations, but these can be used
// when all else fails.

// Report that we may have a benign race at `pointer`, with size
// "sizeof(*(pointer))". `pointer` must be a non-void* pointer. Insert at the
// point where `pointer` has been allocated, preferably close to the point
// where the race happens. See also ABSL_ANNOTATE_BENIGN_RACE_STATIC.
#define ABSL_ANNOTATE_BENIGN_RACE(pointer, description) \
  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateBenignRaceSized)  \
  (__FILE__, __LINE__, pointer, sizeof(*(pointer)), description)

// Same as ABSL_ANNOTATE_BENIGN_RACE(`address`, `description`), but applies to
// the memory range [`address`, `address`+`size`).
#define ABSL_ANNOTATE_BENIGN_RACE_SIZED(address, size, description) \
  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateBenignRaceSized)              \
  (__FILE__, __LINE__, address, size, description)

// Enable (`enable`!=0) or disable (`enable`==0) race detection for all threads.
// This annotation could be useful if you want to skip expensive race analysis
// during some period of program execution, e.g. during initialization.
#define ABSL_ANNOTATE_ENABLE_RACE_DETECTION(enable)        \
  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateEnableRaceDetection) \
  (__FILE__, __LINE__, enable)

// -------------------------------------------------------------
// Annotations useful for debugging.

// Report the current thread `name` to a race detector.
#define ABSL_ANNOTATE_THREAD_NAME(name) \
  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateThreadName)(__FILE__, __LINE__, name)

// -------------------------------------------------------------
// Annotations useful when implementing locks. They are not normally needed by
// modules that merely use locks. The `lock` argument is a pointer to the lock
// object.

// Report that a lock has been created at address `lock`.
#define ABSL_ANNOTATE_RWLOCK_CREATE(lock) \
  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockCreate)(__FILE__, __LINE__, lock)

// Report that a linker initialized lock has been created at address `lock`.
#ifdef ABSL_HAVE_THREAD_SANITIZER
#define ABSL_ANNOTATE_RWLOCK_CREATE_STATIC(lock)          \
  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockCreateStatic) \
  (__FILE__, __LINE__, lock)
#else
#define ABSL_ANNOTATE_RWLOCK_CREATE_STATIC(lock) \
  ABSL_ANNOTATE_RWLOCK_CREATE(lock)
#endif

// Report that the lock at address `lock` is about to be destroyed.
#define ABSL_ANNOTATE_RWLOCK_DESTROY(lock) \
  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockDestroy)(__FILE__, __LINE__, lock)

// Report that the lock at address `lock` has been acquired.
// `is_w`=1 for writer lock, `is_w`=0 for reader lock.
#define ABSL_ANNOTATE_RWLOCK_ACQUIRED(lock, is_w)     \
  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockAcquired) \
  (__FILE__, __LINE__, lock, is_w)

// Report that the lock at address `lock` is about to be released.
// `is_w`=1 for writer lock, `is_w`=0 for reader lock.
#define ABSL_ANNOTATE_RWLOCK_RELEASED(lock, is_w)     \
  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockReleased) \
  (__FILE__, __LINE__, lock, is_w)

// Apply ABSL_ANNOTATE_BENIGN_RACE_SIZED to a static variable `static_var`.
#define ABSL_ANNOTATE_BENIGN_RACE_STATIC(static_var, description)      \
  namespace {                                                          \
  class static_var##_annotator {                                       \
   public:                                                             \
    static_var##_annotator() {                                         \
      ABSL_ANNOTATE_BENIGN_RACE_SIZED(&static_var, sizeof(static_var), \
                                      #static_var ": " description);   \
    }                                                                  \
  };                                                                   \
  static static_var##_annotator the##static_var##_annotator;           \
  }  // namespace

// Function prototypes of annotations provided by the compiler-based sanitizer
// implementation.
ABSL_INTERNAL_BEGIN_EXTERN_C
void AnnotateRWLockCreate(const char* file, int line,
                          const volatile void* lock);
void AnnotateRWLockCreateStatic(const char* file, int line,
                                const volatile void* lock);
void AnnotateRWLockDestroy(const char* file, int line,
                           const volatile void* lock);
void AnnotateRWLockAcquired(const char* file, int line,
                            const volatile void* lock, long is_w);  // NOLINT
void AnnotateRWLockReleased(const char* file, int line,
                            const volatile void* lock, long is_w);  // NOLINT
void AnnotateBenignRace(const char* file, int line,
                        const volatile void* address, const char* description);
void AnnotateBenignRaceSized(const char* file, int line,
                             const volatile void* address, size_t size,
                             const char* description);
void AnnotateThreadName(const char* file, int line, const char* name);
void AnnotateEnableRaceDetection(const char* file, int line, int enable);
ABSL_INTERNAL_END_EXTERN_C

#else  // ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED == 0

#define ABSL_ANNOTATE_RWLOCK_CREATE(lock)                            // empty
#define ABSL_ANNOTATE_RWLOCK_CREATE_STATIC(lock)                     // empty
#define ABSL_ANNOTATE_RWLOCK_DESTROY(lock)                           // empty
#define ABSL_ANNOTATE_RWLOCK_ACQUIRED(lock, is_w)                    // empty
#define ABSL_ANNOTATE_RWLOCK_RELEASED(lock, is_w)                    // empty
#define ABSL_ANNOTATE_BENIGN_RACE(address, description)              // empty
#define ABSL_ANNOTATE_BENIGN_RACE_SIZED(address, size, description)  // empty
#define ABSL_ANNOTATE_THREAD_NAME(name)                              // empty
#define ABSL_ANNOTATE_ENABLE_RACE_DETECTION(enable)                  // empty
#define ABSL_ANNOTATE_BENIGN_RACE_STATIC(static_var, description)    // empty

#endif  // ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED

// -------------------------------------------------------------------------
// Define memory annotations.

#ifdef ABSL_HAVE_MEMORY_SANITIZER

#include <sanitizer/msan_interface.h>

#define ABSL_ANNOTATE_MEMORY_IS_INITIALIZED(address, size) \
  __msan_unpoison(address, size)

#define ABSL_ANNOTATE_MEMORY_IS_UNINITIALIZED(address, size) \
  __msan_allocated_memory(address, size)

#else  // !defined(ABSL_HAVE_MEMORY_SANITIZER)

// TODO(rogeeff): remove this branch
#ifdef ABSL_HAVE_THREAD_SANITIZER
#define ABSL_ANNOTATE_MEMORY_IS_INITIALIZED(address, size) \
  do {                                                     \
    (void)(address);                                       \
    (void)(size);                                          \
  } while (0)
#define ABSL_ANNOTATE_MEMORY_IS_UNINITIALIZED(address, size) \
  do {                                                       \
    (void)(address);                                         \
    (void)(size);                                            \
  } while (0)
#else

#define ABSL_ANNOTATE_MEMORY_IS_INITIALIZED(address, size)    // empty
#define ABSL_ANNOTATE_MEMORY_IS_UNINITIALIZED(address, size)  // empty

#endif

#endif  // ABSL_HAVE_MEMORY_SANITIZER

// -------------------------------------------------------------------------
// Define IGNORE_READS_BEGIN/_END attributes.

#if defined(ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED)

#define ABSL_INTERNAL_IGNORE_READS_BEGIN_ATTRIBUTE \
  __attribute((exclusive_lock_function("*")))
#define ABSL_INTERNAL_IGNORE_READS_END_ATTRIBUTE \
  __attribute((unlock_function("*")))

#else  // !defined(ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED)

#define ABSL_INTERNAL_IGNORE_READS_BEGIN_ATTRIBUTE  // empty
#define ABSL_INTERNAL_IGNORE_READS_END_ATTRIBUTE    // empty

#endif  // defined(ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED)

// -------------------------------------------------------------------------
// Define IGNORE_READS_BEGIN/_END annotations.

#if ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED == 1
// Some of the symbols used in this section (e.g. AnnotateIgnoreReadsBegin) are
// defined by the compiler-based implementation, not by the Abseil
// library. Therefore they do not use ABSL_INTERNAL_C_SYMBOL.

// Request the analysis tool to ignore all reads in the current thread until
// ABSL_ANNOTATE_IGNORE_READS_END is called. Useful to ignore intentional racey
// reads, while still checking other reads and all writes.
// See also ABSL_ANNOTATE_UNPROTECTED_READ.
#define ABSL_ANNOTATE_IGNORE_READS_BEGIN()              \
  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreReadsBegin) \
  (__FILE__, __LINE__)

// Stop ignoring reads.
#define ABSL_ANNOTATE_IGNORE_READS_END()              \
  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreReadsEnd) \
  (__FILE__, __LINE__)

// Function prototypes of annotations provided by the compiler-based sanitizer
// implementation.
ABSL_INTERNAL_BEGIN_EXTERN_C
void AnnotateIgnoreReadsBegin(const char* file, int line)
    ABSL_INTERNAL_IGNORE_READS_BEGIN_ATTRIBUTE;
void AnnotateIgnoreReadsEnd(const char* file,
                            int line) ABSL_INTERNAL_IGNORE_READS_END_ATTRIBUTE;
ABSL_INTERNAL_END_EXTERN_C

#elif defined(ABSL_INTERNAL_ANNOTALYSIS_ENABLED)

// When Annotalysis is enabled without Dynamic Annotations, the use of
// static-inline functions allows the annotations to be read at compile-time,
// while still letting the compiler elide the functions from the final build.
//
// TODO(delesley) -- The exclusive lock here ignores writes as well, but
// allows IGNORE_READS_AND_WRITES to work properly.

#define ABSL_ANNOTATE_IGNORE_READS_BEGIN()                          \
  ABSL_INTERNAL_GLOBAL_SCOPED(                                      \
      ABSL_INTERNAL_C_SYMBOL(AbslInternalAnnotateIgnoreReadsBegin)) \
  ()

#define ABSL_ANNOTATE_IGNORE_READS_END()                          \
  ABSL_INTERNAL_GLOBAL_SCOPED(                                    \
      ABSL_INTERNAL_C_SYMBOL(AbslInternalAnnotateIgnoreReadsEnd)) \
  ()

ABSL_INTERNAL_STATIC_INLINE void ABSL_INTERNAL_C_SYMBOL(
    AbslInternalAnnotateIgnoreReadsBegin)()
    ABSL_INTERNAL_IGNORE_READS_BEGIN_ATTRIBUTE {}

ABSL_INTERNAL_STATIC_INLINE void ABSL_INTERNAL_C_SYMBOL(
    AbslInternalAnnotateIgnoreReadsEnd)()
    ABSL_INTERNAL_IGNORE_READS_END_ATTRIBUTE {}

#else

#define ABSL_ANNOTATE_IGNORE_READS_BEGIN()  // empty
#define ABSL_ANNOTATE_IGNORE_READS_END()    // empty

#endif

// -------------------------------------------------------------------------
// Define IGNORE_WRITES_BEGIN/_END annotations.

#if ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED == 1

// Similar to ABSL_ANNOTATE_IGNORE_READS_BEGIN, but ignore writes instead.
#define ABSL_ANNOTATE_IGNORE_WRITES_BEGIN() \
  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreWritesBegin)(__FILE__, __LINE__)

// Stop ignoring writes.
#define ABSL_ANNOTATE_IGNORE_WRITES_END() \
  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreWritesEnd)(__FILE__, __LINE__)

// Function prototypes of annotations provided by the compiler-based sanitizer
// implementation.
ABSL_INTERNAL_BEGIN_EXTERN_C
void AnnotateIgnoreWritesBegin(const char* file, int line);
void AnnotateIgnoreWritesEnd(const char* file, int line);
ABSL_INTERNAL_END_EXTERN_C

#else

#define ABSL_ANNOTATE_IGNORE_WRITES_BEGIN()  // empty
#define ABSL_ANNOTATE_IGNORE_WRITES_END()    // empty

#endif

// -------------------------------------------------------------------------
// Define the ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_* annotations using the more
// primitive annotations defined above.
//
//     Instead of doing
//        ABSL_ANNOTATE_IGNORE_READS_BEGIN();
//        ... = x;
//        ABSL_ANNOTATE_IGNORE_READS_END();
//     one can use
//        ... = ABSL_ANNOTATE_UNPROTECTED_READ(x);

#if defined(ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED)

// Start ignoring all memory accesses (both reads and writes).
#define ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_BEGIN() \
  do {                                                \
    ABSL_ANNOTATE_IGNORE_READS_BEGIN();               \
    ABSL_ANNOTATE_IGNORE_WRITES_BEGIN();              \
  } while (0)

// Stop ignoring both reads and writes.
#define ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_END() \
  do {                                              \
    ABSL_ANNOTATE_IGNORE_WRITES_END();              \
    ABSL_ANNOTATE_IGNORE_READS_END();               \
  } while (0)

#ifdef __cplusplus
// ABSL_ANNOTATE_UNPROTECTED_READ is the preferred way to annotate racey reads.
#define ABSL_ANNOTATE_UNPROTECTED_READ(x) \
  absl::base_internal::AnnotateUnprotectedRead(x)

namespace absl {
ABSL_NAMESPACE_BEGIN
namespace base_internal {

template <typename T>
inline T AnnotateUnprotectedRead(const volatile T& x) {  // NOLINT
  ABSL_ANNOTATE_IGNORE_READS_BEGIN();
  T res = x;
  ABSL_ANNOTATE_IGNORE_READS_END();
  return res;
}

}  // namespace base_internal
ABSL_NAMESPACE_END
}  // namespace absl
#endif

#else

#define ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_BEGIN()  // empty
#define ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_END()    // empty
#define ABSL_ANNOTATE_UNPROTECTED_READ(x) (x)

#endif

#ifdef __cplusplus
#ifdef ABSL_HAVE_THREAD_SANITIZER
ABSL_INTERNAL_BEGIN_EXTERN_C
int RunningOnValgrind();
double ValgrindSlowdown();
ABSL_INTERNAL_END_EXTERN_C
#else
namespace absl {
ABSL_NAMESPACE_BEGIN
namespace base_internal {
ABSL_DEPRECATED(
    "Don't use this interface. It is misleading and is being deleted.")
ABSL_ATTRIBUTE_ALWAYS_INLINE inline int RunningOnValgrind() { return 0; }
ABSL_DEPRECATED(
    "Don't use this interface. It is misleading and is being deleted.")
ABSL_ATTRIBUTE_ALWAYS_INLINE inline double ValgrindSlowdown() { return 1.0; }
}  // namespace base_internal
ABSL_NAMESPACE_END
}  // namespace absl

using absl::base_internal::RunningOnValgrind;
using absl::base_internal::ValgrindSlowdown;
#endif
#endif

// -------------------------------------------------------------------------
// Address sanitizer annotations

#ifdef ABSL_HAVE_ADDRESS_SANITIZER
// Describe the current state of a contiguous container such as e.g.
// std::vector or std::string. For more details see
// sanitizer/common_interface_defs.h, which is provided by the compiler.
#include <sanitizer/common_interface_defs.h>

#define ABSL_ANNOTATE_CONTIGUOUS_CONTAINER(beg, end, old_mid, new_mid) \
  __sanitizer_annotate_contiguous_container(beg, end, old_mid, new_mid)
#define ABSL_ADDRESS_SANITIZER_REDZONE(name) \
  struct {                                   \
    char x[8] __attribute__((aligned(8)));   \
  } name

#else

#define ABSL_ANNOTATE_CONTIGUOUS_CONTAINER(beg, end, old_mid, new_mid)  // empty
#define ABSL_ADDRESS_SANITIZER_REDZONE(name) static_assert(true, "")

#endif  // ABSL_HAVE_ADDRESS_SANITIZER

// -------------------------------------------------------------------------
// Undefine the macros intended only for this file.

#undef ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED
#undef ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED
#undef ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED
#undef ABSL_INTERNAL_ANNOTALYSIS_ENABLED
#undef ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED
#undef ABSL_INTERNAL_BEGIN_EXTERN_C
#undef ABSL_INTERNAL_END_EXTERN_C
#undef ABSL_INTERNAL_STATIC_INLINE

#endif  // ABSL_BASE_DYNAMIC_ANNOTATIONS_H_