aboutsummaryrefslogtreecommitdiffstats
path: root/lib/msan/msan.h
blob: ac5f67e6ab3d5308c15d6137639ad704ae644714 (plain) (blame)
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
//===-- msan.h --------------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is a part of MemorySanitizer.
//
// Private MSan header.
//===----------------------------------------------------------------------===//

#ifndef MSAN_H
#define MSAN_H

#include "sanitizer_common/sanitizer_flags.h"
#include "sanitizer_common/sanitizer_internal_defs.h"
#include "sanitizer_common/sanitizer_stacktrace.h"
#include "msan_interface_internal.h"
#include "msan_flags.h"
#include "ubsan/ubsan_platform.h"

#ifndef MSAN_REPLACE_OPERATORS_NEW_AND_DELETE
# define MSAN_REPLACE_OPERATORS_NEW_AND_DELETE 1
#endif

#ifndef MSAN_CONTAINS_UBSAN
# define MSAN_CONTAINS_UBSAN CAN_SANITIZE_UB
#endif

struct MappingDesc {
  uptr start;
  uptr end;
  enum Type {
    INVALID, APP, SHADOW, ORIGIN
  } type;
  const char *name;
};


#if SANITIZER_LINUX && defined(__mips64)

// MIPS64 maps:
// - 0x0000000000-0x0200000000: Program own segments
// - 0xa200000000-0xc000000000: PIE program segments
// - 0xe200000000-0xffffffffff: libraries segments.
const MappingDesc kMemoryLayout[] = {
    {0x000000000000ULL, 0x000200000000ULL, MappingDesc::APP, "app-1"},
    {0x000200000000ULL, 0x002200000000ULL, MappingDesc::INVALID, "invalid"},
    {0x002200000000ULL, 0x004000000000ULL, MappingDesc::SHADOW, "shadow-2"},
    {0x004000000000ULL, 0x004200000000ULL, MappingDesc::INVALID, "invalid"},
    {0x004200000000ULL, 0x006000000000ULL, MappingDesc::ORIGIN, "origin-2"},
    {0x006000000000ULL, 0x006200000000ULL, MappingDesc::INVALID, "invalid"},
    {0x006200000000ULL, 0x008000000000ULL, MappingDesc::SHADOW, "shadow-3"},
    {0x008000000000ULL, 0x008200000000ULL, MappingDesc::SHADOW, "shadow-1"},
    {0x008200000000ULL, 0x00a000000000ULL, MappingDesc::ORIGIN, "origin-3"},
    {0x00a000000000ULL, 0x00a200000000ULL, MappingDesc::ORIGIN, "origin-1"},
    {0x00a200000000ULL, 0x00c000000000ULL, MappingDesc::APP, "app-2"},
    {0x00c000000000ULL, 0x00e200000000ULL, MappingDesc::INVALID, "invalid"},
    {0x00e200000000ULL, 0x00ffffffffffULL, MappingDesc::APP, "app-3"}};

#define MEM_TO_SHADOW(mem) (((uptr)(mem)) ^ 0x8000000000ULL)
#define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x2000000000ULL)

#elif SANITIZER_LINUX && defined(__aarch64__)

// The mapping describes both 39-bits, 42-bits, and 48-bits VMA.  AArch64
// maps:
// - 0x0000000000000-0x0000010000000: 39/42/48-bits program own segments
// - 0x0005500000000-0x0005600000000: 39-bits PIE program segments
// - 0x0007f80000000-0x0007fffffffff: 39-bits libraries segments
// - 0x002aa00000000-0x002ab00000000: 42-bits PIE program segments
// - 0x003ff00000000-0x003ffffffffff: 42-bits libraries segments
// - 0x0aaaaa0000000-0x0aaab00000000: 48-bits PIE program segments
// - 0xffff000000000-0x1000000000000: 48-bits libraries segments
// It is fragmented in multiples segments to increase the memory available
// on 42-bits (12.21% of total VMA available for 42-bits and 13.28 for
// 39 bits). The 48-bits segments only cover the usual PIE/default segments
// plus some more segments (262144GB total, 0.39% total VMA).
const MappingDesc kMemoryLayout[] = {
    {0x00000000000ULL, 0x01000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x01000000000ULL, 0x02000000000ULL, MappingDesc::SHADOW, "shadow-2"},
    {0x02000000000ULL, 0x03000000000ULL, MappingDesc::ORIGIN, "origin-2"},
    {0x03000000000ULL, 0x04000000000ULL, MappingDesc::SHADOW, "shadow-1"},
    {0x04000000000ULL, 0x05000000000ULL, MappingDesc::ORIGIN, "origin-1"},
    {0x05000000000ULL, 0x06000000000ULL, MappingDesc::APP, "app-1"},
    {0x06000000000ULL, 0x07000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x07000000000ULL, 0x08000000000ULL, MappingDesc::APP, "app-2"},
    {0x08000000000ULL, 0x09000000000ULL, MappingDesc::INVALID, "invalid"},
    // The mappings below are used only for 42-bits VMA.
    {0x09000000000ULL, 0x0A000000000ULL, MappingDesc::SHADOW, "shadow-3"},
    {0x0A000000000ULL, 0x0B000000000ULL, MappingDesc::ORIGIN, "origin-3"},
    {0x0B000000000ULL, 0x0F000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x0F000000000ULL, 0x10000000000ULL, MappingDesc::APP, "app-3"},
    {0x10000000000ULL, 0x11000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x11000000000ULL, 0x12000000000ULL, MappingDesc::APP, "app-4"},
    {0x12000000000ULL, 0x17000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x17000000000ULL, 0x18000000000ULL, MappingDesc::SHADOW, "shadow-4"},
    {0x18000000000ULL, 0x19000000000ULL, MappingDesc::ORIGIN, "origin-4"},
    {0x19000000000ULL, 0x20000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x20000000000ULL, 0x21000000000ULL, MappingDesc::APP, "app-5"},
    {0x21000000000ULL, 0x26000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x26000000000ULL, 0x27000000000ULL, MappingDesc::SHADOW, "shadow-5"},
    {0x27000000000ULL, 0x28000000000ULL, MappingDesc::ORIGIN, "origin-5"},
    {0x28000000000ULL, 0x29000000000ULL, MappingDesc::SHADOW, "shadow-7"},
    {0x29000000000ULL, 0x2A000000000ULL, MappingDesc::ORIGIN, "origin-7"},
    {0x2A000000000ULL, 0x2B000000000ULL, MappingDesc::APP, "app-6"},
    {0x2B000000000ULL, 0x2C000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x2C000000000ULL, 0x2D000000000ULL, MappingDesc::SHADOW, "shadow-6"},
    {0x2D000000000ULL, 0x2E000000000ULL, MappingDesc::ORIGIN, "origin-6"},
    {0x2E000000000ULL, 0x2F000000000ULL, MappingDesc::APP, "app-7"},
    {0x2F000000000ULL, 0x39000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x39000000000ULL, 0x3A000000000ULL, MappingDesc::SHADOW, "shadow-9"},
    {0x3A000000000ULL, 0x3B000000000ULL, MappingDesc::ORIGIN, "origin-9"},
    {0x3B000000000ULL, 0x3C000000000ULL, MappingDesc::APP, "app-8"},
    {0x3C000000000ULL, 0x3D000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x3D000000000ULL, 0x3E000000000ULL, MappingDesc::SHADOW, "shadow-8"},
    {0x3E000000000ULL, 0x3F000000000ULL, MappingDesc::ORIGIN, "origin-8"},
    {0x3F000000000ULL, 0x40000000000ULL, MappingDesc::APP, "app-9"},
    // The mappings below are used only for 48-bits VMA.
    // TODO(unknown): 48-bit mapping ony covers the usual PIE, non-PIE
    // segments and some more segments totalizing 262144GB of VMA (which cover
    // only 0.32% of all 48-bit VMA). Memory avaliability can be increase by
    // adding multiple application segments like 39 and 42 mapping.
    {0x0040000000000ULL, 0x0041000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x0041000000000ULL, 0x0042000000000ULL, MappingDesc::APP, "app-10"},
    {0x0042000000000ULL, 0x0047000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x0047000000000ULL, 0x0048000000000ULL, MappingDesc::SHADOW, "shadow-10"},
    {0x0048000000000ULL, 0x0049000000000ULL, MappingDesc::ORIGIN, "origin-10"},
    {0x0049000000000ULL, 0x0050000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x0050000000000ULL, 0x0051000000000ULL, MappingDesc::APP, "app-11"},
    {0x0051000000000ULL, 0x0056000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x0056000000000ULL, 0x0057000000000ULL, MappingDesc::SHADOW, "shadow-11"},
    {0x0057000000000ULL, 0x0058000000000ULL, MappingDesc::ORIGIN, "origin-11"},
    {0x0058000000000ULL, 0x0059000000000ULL, MappingDesc::APP, "app-12"},
    {0x0059000000000ULL, 0x005E000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x005E000000000ULL, 0x005F000000000ULL, MappingDesc::SHADOW, "shadow-12"},
    {0x005F000000000ULL, 0x0060000000000ULL, MappingDesc::ORIGIN, "origin-12"},
    {0x0060000000000ULL, 0x0061000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x0061000000000ULL, 0x0062000000000ULL, MappingDesc::APP, "app-13"},
    {0x0062000000000ULL, 0x0067000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x0067000000000ULL, 0x0068000000000ULL, MappingDesc::SHADOW, "shadow-13"},
    {0x0068000000000ULL, 0x0069000000000ULL, MappingDesc::ORIGIN, "origin-13"},
    {0x0069000000000ULL, 0x0AAAAA0000000ULL, MappingDesc::INVALID, "invalid"},
    {0x0AAAAA0000000ULL, 0x0AAAB00000000ULL, MappingDesc::APP, "app-14"},
    {0x0AAAB00000000ULL, 0x0AACAA0000000ULL, MappingDesc::INVALID, "invalid"},
    {0x0AACAA0000000ULL, 0x0AACB00000000ULL, MappingDesc::SHADOW, "shadow-14"},
    {0x0AACB00000000ULL, 0x0AADAA0000000ULL, MappingDesc::INVALID, "invalid"},
    {0x0AADAA0000000ULL, 0x0AADB00000000ULL, MappingDesc::ORIGIN, "origin-14"},
    {0x0AADB00000000ULL, 0x0FF9F00000000ULL, MappingDesc::INVALID, "invalid"},
    {0x0FF9F00000000ULL, 0x0FFA000000000ULL, MappingDesc::SHADOW, "shadow-15"},
    {0x0FFA000000000ULL, 0x0FFAF00000000ULL, MappingDesc::INVALID, "invalid"},
    {0x0FFAF00000000ULL, 0x0FFB000000000ULL, MappingDesc::ORIGIN, "origin-15"},
    {0x0FFB000000000ULL, 0x0FFFF00000000ULL, MappingDesc::INVALID, "invalid"},
    {0x0FFFF00000000ULL, 0x1000000000000ULL, MappingDesc::APP, "app-15"},
};
# define MEM_TO_SHADOW(mem) ((uptr)mem ^ 0x6000000000ULL)
# define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x1000000000ULL)

#elif SANITIZER_LINUX && SANITIZER_PPC64
const MappingDesc kMemoryLayout[] = {
    {0x000000000000ULL, 0x000200000000ULL, MappingDesc::APP, "low memory"},
    {0x000200000000ULL, 0x080000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x080000000000ULL, 0x180200000000ULL, MappingDesc::SHADOW, "shadow"},
    {0x180200000000ULL, 0x1C0000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x1C0000000000ULL, 0x2C0200000000ULL, MappingDesc::ORIGIN, "origin"},
    {0x2C0200000000ULL, 0x300000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x300000000000ULL, 0x800000000000ULL, MappingDesc::APP, "high memory"}};

// Various kernels use different low end ranges but we can combine them into one
// big range. They also use different high end ranges but we can map them all to
// one range.
// Maps low and high app ranges to contiguous space with zero base:
//   Low:  0000 0000 0000 - 0001 ffff ffff  ->  1000 0000 0000 - 1001 ffff ffff
//   High: 3000 0000 0000 - 3fff ffff ffff  ->  0000 0000 0000 - 0fff ffff ffff
//   High: 4000 0000 0000 - 4fff ffff ffff  ->  0000 0000 0000 - 0fff ffff ffff
//   High: 7000 0000 0000 - 7fff ffff ffff  ->  0000 0000 0000 - 0fff ffff ffff
#define LINEARIZE_MEM(mem) \
  (((uptr)(mem) & ~0xE00000000000ULL) ^ 0x100000000000ULL)
#define MEM_TO_SHADOW(mem) (LINEARIZE_MEM((mem)) + 0x080000000000ULL)
#define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x140000000000ULL)

#elif SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 64

// Low memory: main binary, MAP_32BIT mappings and modules
// High memory: heap, modules and main thread stack
const MappingDesc kMemoryLayout[] = {
    {0x000000000000ULL, 0x010000000000ULL, MappingDesc::APP, "low memory"},
    {0x010000000000ULL, 0x100000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x100000000000ULL, 0x310000000000ULL, MappingDesc::SHADOW, "shadow"},
    {0x310000000000ULL, 0x380000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x380000000000ULL, 0x590000000000ULL, MappingDesc::ORIGIN, "origin"},
    {0x590000000000ULL, 0x600000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x600000000000ULL, 0x800000000000ULL, MappingDesc::APP, "high memory"}};

// Maps low and high app ranges to contiguous space with zero base:
//   Low:  0000 0000 0000 - 00ff ffff ffff  ->  2000 0000 0000 - 20ff ffff ffff
//   High: 6000 0000 0000 - 7fff ffff ffff  ->  0000 0000 0000 - 1fff ffff ffff
#define LINEARIZE_MEM(mem) \
  (((uptr)(mem) & ~0xc00000000000ULL) ^ 0x200000000000ULL)
#define MEM_TO_SHADOW(mem) (LINEARIZE_MEM((mem)) + 0x100000000000ULL)
#define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x280000000000)

#elif SANITIZER_NETBSD || (SANITIZER_LINUX && SANITIZER_WORDSIZE == 64)

#ifdef MSAN_LINUX_X86_64_OLD_MAPPING
// Requries PIE binary and ASLR enabled.
// Main thread stack and DSOs at 0x7f0000000000 (sometimes 0x7e0000000000).
// Heap at 0x600000000000.
const MappingDesc kMemoryLayout[] = {
    {0x000000000000ULL, 0x200000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x200000000000ULL, 0x400000000000ULL, MappingDesc::SHADOW, "shadow"},
    {0x400000000000ULL, 0x600000000000ULL, MappingDesc::ORIGIN, "origin"},
    {0x600000000000ULL, 0x800000000000ULL, MappingDesc::APP, "app"}};

#define MEM_TO_SHADOW(mem) (((uptr)(mem)) & ~0x400000000000ULL)
#define SHADOW_TO_ORIGIN(mem) (((uptr)(mem)) + 0x200000000000ULL)
#else  // MSAN_LINUX_X86_64_OLD_MAPPING
// All of the following configurations are supported.
// ASLR disabled: main executable and DSOs at 0x555550000000
// PIE and ASLR: main executable and DSOs at 0x7f0000000000
// non-PIE: main executable below 0x100000000, DSOs at 0x7f0000000000
// Heap at 0x700000000000.
const MappingDesc kMemoryLayout[] = {
    {0x000000000000ULL, 0x010000000000ULL, MappingDesc::APP, "app-1"},
    {0x010000000000ULL, 0x100000000000ULL, MappingDesc::SHADOW, "shadow-2"},
    {0x100000000000ULL, 0x110000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x110000000000ULL, 0x200000000000ULL, MappingDesc::ORIGIN, "origin-2"},
    {0x200000000000ULL, 0x300000000000ULL, MappingDesc::SHADOW, "shadow-3"},
    {0x300000000000ULL, 0x400000000000ULL, MappingDesc::ORIGIN, "origin-3"},
    {0x400000000000ULL, 0x500000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x500000000000ULL, 0x510000000000ULL, MappingDesc::SHADOW, "shadow-1"},
    {0x510000000000ULL, 0x600000000000ULL, MappingDesc::APP, "app-2"},
    {0x600000000000ULL, 0x610000000000ULL, MappingDesc::ORIGIN, "origin-1"},
    {0x610000000000ULL, 0x700000000000ULL, MappingDesc::INVALID, "invalid"},
    {0x700000000000ULL, 0x800000000000ULL, MappingDesc::APP, "app-3"}};
#define MEM_TO_SHADOW(mem) (((uptr)(mem)) ^ 0x500000000000ULL)
#define SHADOW_TO_ORIGIN(mem) (((uptr)(mem)) + 0x100000000000ULL)
#endif  // MSAN_LINUX_X86_64_OLD_MAPPING

#else
#error "Unsupported platform"
#endif

const uptr kMemoryLayoutSize = sizeof(kMemoryLayout) / sizeof(kMemoryLayout[0]);

#define MEM_TO_ORIGIN(mem) (SHADOW_TO_ORIGIN(MEM_TO_SHADOW((mem))))

#ifndef __clang__
__attribute__((optimize("unroll-loops")))
#endif
inline bool addr_is_type(uptr addr, MappingDesc::Type mapping_type) {
// It is critical for performance that this loop is unrolled (because then it is
// simplified into just a few constant comparisons).
#ifdef __clang__
#pragma unroll
#endif
  for (unsigned i = 0; i < kMemoryLayoutSize; ++i)
    if (kMemoryLayout[i].type == mapping_type &&
        addr >= kMemoryLayout[i].start && addr < kMemoryLayout[i].end)
      return true;
  return false;
}

#define MEM_IS_APP(mem) addr_is_type((uptr)(mem), MappingDesc::APP)
#define MEM_IS_SHADOW(mem) addr_is_type((uptr)(mem), MappingDesc::SHADOW)
#define MEM_IS_ORIGIN(mem) addr_is_type((uptr)(mem), MappingDesc::ORIGIN)

// These constants must be kept in sync with the ones in MemorySanitizer.cc.
const int kMsanParamTlsSize = 800;
const int kMsanRetvalTlsSize = 800;

namespace __msan {
extern int msan_inited;
extern bool msan_init_is_running;
extern int msan_report_count;

bool ProtectRange(uptr beg, uptr end);
bool InitShadow(bool init_origins);
char *GetProcSelfMaps();
void InitializeInterceptors();

void MsanAllocatorInit();
void MsanAllocatorThreadFinish();
void MsanDeallocate(StackTrace *stack, void *ptr);

void *msan_malloc(uptr size, StackTrace *stack);
void *msan_calloc(uptr nmemb, uptr size, StackTrace *stack);
void *msan_realloc(void *ptr, uptr size, StackTrace *stack);
void *msan_reallocarray(void *ptr, uptr nmemb, uptr size, StackTrace *stack);
void *msan_valloc(uptr size, StackTrace *stack);
void *msan_pvalloc(uptr size, StackTrace *stack);
void *msan_aligned_alloc(uptr alignment, uptr size, StackTrace *stack);
void *msan_memalign(uptr alignment, uptr size, StackTrace *stack);
int msan_posix_memalign(void **memptr, uptr alignment, uptr size,
                        StackTrace *stack);

void InstallTrapHandler();
void InstallAtExitHandler();

const char *GetStackOriginDescr(u32 id, uptr *pc);

void EnterSymbolizer();
void ExitSymbolizer();
bool IsInSymbolizer();

struct SymbolizerScope {
  SymbolizerScope() { EnterSymbolizer(); }
  ~SymbolizerScope() { ExitSymbolizer(); }
};

void PrintWarning(uptr pc, uptr bp);
void PrintWarningWithOrigin(uptr pc, uptr bp, u32 origin);

// Unpoison first n function arguments.
void UnpoisonParam(uptr n);
void UnpoisonThreadLocalState();

// Returns a "chained" origin id, pointing to the given stack trace followed by
// the previous origin id.
u32 ChainOrigin(u32 id, StackTrace *stack);

const int STACK_TRACE_TAG_POISON = StackTrace::TAG_CUSTOM + 1;

#define GET_MALLOC_STACK_TRACE                                            \
  BufferedStackTrace stack;                                               \
  if (__msan_get_track_origins() && msan_inited)                          \
    stack.Unwind(StackTrace::GetCurrentPc(), GET_CURRENT_FRAME(),         \
                 nullptr, common_flags()->fast_unwind_on_malloc,          \
                 common_flags()->malloc_context_size)

// For platforms which support slow unwinder only, we restrict the store context
// size to 1, basically only storing the current pc. We do this because the slow
// unwinder which is based on libunwind is not async signal safe and causes
// random freezes in forking applications as well as in signal handlers.
#define GET_STORE_STACK_TRACE_PC_BP(pc, bp)                                    \
  BufferedStackTrace stack;                                                    \
  if (__msan_get_track_origins() > 1 && msan_inited) {                         \
    int size = flags()->store_context_size;                                    \
    if (!SANITIZER_CAN_FAST_UNWIND)                                            \
      size = Min(size, 1);                                                     \
    stack.Unwind(pc, bp, nullptr, common_flags()->fast_unwind_on_malloc, size);\
  }

#define GET_STORE_STACK_TRACE \
  GET_STORE_STACK_TRACE_PC_BP(StackTrace::GetCurrentPc(), GET_CURRENT_FRAME())

#define GET_FATAL_STACK_TRACE_PC_BP(pc, bp)              \
  BufferedStackTrace stack;                              \
  if (msan_inited)                                       \
    stack.Unwind(pc, bp, nullptr, common_flags()->fast_unwind_on_fatal)

#define GET_FATAL_STACK_TRACE_HERE \
  GET_FATAL_STACK_TRACE_PC_BP(StackTrace::GetCurrentPc(), GET_CURRENT_FRAME())

#define PRINT_CURRENT_STACK_CHECK() \
  {                                 \
    GET_FATAL_STACK_TRACE_HERE;     \
    stack.Print();                  \
  }

class ScopedThreadLocalStateBackup {
 public:
  ScopedThreadLocalStateBackup() { Backup(); }
  ~ScopedThreadLocalStateBackup() { Restore(); }
  void Backup();
  void Restore();
 private:
  u64 va_arg_overflow_size_tls;
};

void MsanTSDInit(void (*destructor)(void *tsd));
void *MsanTSDGet();
void MsanTSDSet(void *tsd);
void MsanTSDDtor(void *tsd);

}  // namespace __msan

#define MSAN_MALLOC_HOOK(ptr, size)       \
  do {                                    \
    if (&__sanitizer_malloc_hook) {       \
      UnpoisonParam(2);                   \
      __sanitizer_malloc_hook(ptr, size); \
    }                                     \
    RunMallocHooks(ptr, size);            \
  } while (false)
#define MSAN_FREE_HOOK(ptr)       \
  do {                            \
    if (&__sanitizer_free_hook) { \
      UnpoisonParam(1);           \
      __sanitizer_free_hook(ptr); \
    }                             \
    RunFreeHooks(ptr);            \
  } while (false)

#endif  // MSAN_H