msan_interceptors.cc revision 0797ed4bfc4adaa1436dbd153b276ed9c917f1b7 
1//===-- msan_interceptors.cc ----------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file is a part of MemorySanitizer.
11//
12// Interceptors for standard library functions.
13//
14// FIXME: move as many interceptors as possible into
15// sanitizer_common/sanitizer_common_interceptors.h
16//===----------------------------------------------------------------------===//
17
18#include "interception/interception.h"
19#include "msan.h"
20#include "sanitizer_common/sanitizer_platform_limits_posix.h"
21#include "sanitizer_common/sanitizer_allocator.h"
22#include "sanitizer_common/sanitizer_common.h"
23#include "sanitizer_common/sanitizer_stackdepot.h"
24#include "sanitizer_common/sanitizer_libc.h"
25#include "sanitizer_common/sanitizer_linux.h"
26
27#include <stdarg.h>
28// ACHTUNG! No other system header includes in this file.
29// Ideally, we should get rid of stdarg.h as well.
30
31using namespace __msan;
32
33// True if this is a nested interceptor.
34static THREADLOCAL int in_interceptor_scope;
35
36struct InterceptorScope {
37  InterceptorScope() { ++in_interceptor_scope; }
38  ~InterceptorScope() { --in_interceptor_scope; }
39};
40
41bool IsInInterceptorScope() {
42  return in_interceptor_scope;
43}
44
45#define ENSURE_MSAN_INITED() do { \
46  CHECK(!msan_init_is_running); \
47  if (!msan_inited) { \
48    __msan_init(); \
49  } \
50} while (0)
51
52// Check that [x, x+n) range is unpoisoned.
53#define CHECK_UNPOISONED_0(x, n)                                             \
54  do {                                                                       \
55    sptr offset = __msan_test_shadow(x, n);                                  \
56    if (__msan::IsInSymbolizer()) break;                                     \
57    if (offset >= 0 && __msan::flags()->report_umrs) {                       \
58      GET_CALLER_PC_BP_SP;                                                   \
59      (void) sp;                                                             \
60      Printf("UMR in %s at offset %d inside [%p, +%d) \n", __FUNCTION__,     \
61             offset, x, n);                                                  \
62      __msan::PrintWarningWithOrigin(pc, bp,                                 \
63                                     __msan_get_origin((char *)x + offset)); \
64      if (!__msan::flags()->keep_going) {                                    \
65        Printf("Exiting\n");                                                 \
66        Die();                                                               \
67      }                                                                      \
68    }                                                                        \
69  } while (0)
70
71// Check that [x, x+n) range is unpoisoned unless we are in a nested
72// interceptor.
73#define CHECK_UNPOISONED(x, n) \
74  if (!IsInInterceptorScope()) CHECK_UNPOISONED_0(x, n);
75
76static void *fast_memset(void *ptr, int c, SIZE_T n);
77static void *fast_memcpy(void *dst, const void *src, SIZE_T n);
78
79INTERCEPTOR(SIZE_T, fread, void *ptr, SIZE_T size, SIZE_T nmemb, void *file) {
80  ENSURE_MSAN_INITED();
81  SIZE_T res = REAL(fread)(ptr, size, nmemb, file);
82  if (res > 0)
83    __msan_unpoison(ptr, res *size);
84  return res;
85}
86
87INTERCEPTOR(SIZE_T, fread_unlocked, void *ptr, SIZE_T size, SIZE_T nmemb,
88            void *file) {
89  ENSURE_MSAN_INITED();
90  SIZE_T res = REAL(fread_unlocked)(ptr, size, nmemb, file);
91  if (res > 0)
92    __msan_unpoison(ptr, res *size);
93  return res;
94}
95
96INTERCEPTOR(SSIZE_T, readlink, const char *path, char *buf, SIZE_T bufsiz) {
97  ENSURE_MSAN_INITED();
98  SSIZE_T res = REAL(readlink)(path, buf, bufsiz);
99  if (res > 0)
100    __msan_unpoison(buf, res);
101  return res;
102}
103
104INTERCEPTOR(void *, readdir, void *a) {
105  ENSURE_MSAN_INITED();
106  void *res = REAL(readdir)(a);
107  __msan_unpoison(res, __sanitizer::struct_dirent_sz);
108  return res;
109}
110
111INTERCEPTOR(void *, readdir64, void *a) {
112  ENSURE_MSAN_INITED();
113  void *res = REAL(readdir)(a);
114  __msan_unpoison(res, __sanitizer::struct_dirent64_sz);
115  return res;
116}
117
118INTERCEPTOR(void *, memcpy, void *dest, const void *src, SIZE_T n) {
119  return __msan_memcpy(dest, src, n);
120}
121
122INTERCEPTOR(void *, memmove, void *dest, const void *src, SIZE_T n) {
123  return __msan_memmove(dest, src, n);
124}
125
126INTERCEPTOR(void *, memset, void *s, int c, SIZE_T n) {
127  return __msan_memset(s, c, n);
128}
129
130INTERCEPTOR(int, posix_memalign, void **memptr, SIZE_T alignment, SIZE_T size) {
131  GET_MALLOC_STACK_TRACE;
132  CHECK_EQ(alignment & (alignment - 1), 0);
133  CHECK_NE(memptr, 0);
134  *memptr = MsanReallocate(&stack, 0, size, alignment, false);
135  CHECK_NE(*memptr, 0);
136  __msan_unpoison(memptr, sizeof(*memptr));
137  return 0;
138}
139
140INTERCEPTOR(void, free, void *ptr) {
141  ENSURE_MSAN_INITED();
142  if (ptr == 0) return;
143  MsanDeallocate(ptr);
144}
145
146INTERCEPTOR(SIZE_T, strlen, const char *s) {
147  ENSURE_MSAN_INITED();
148  SIZE_T res = REAL(strlen)(s);
149  CHECK_UNPOISONED(s, res + 1);
150  return res;
151}
152
153INTERCEPTOR(SIZE_T, strnlen, const char *s, SIZE_T n) {
154  ENSURE_MSAN_INITED();
155  SIZE_T res = REAL(strnlen)(s, n);
156  SIZE_T scan_size = (res == n) ? res : res + 1;
157  CHECK_UNPOISONED(s, scan_size);
158  return res;
159}
160
161// FIXME: Add stricter shadow checks in str* interceptors (ex.: strcpy should
162// check the shadow of the terminating \0 byte).
163
164INTERCEPTOR(char *, strcpy, char *dest, const char *src) {  // NOLINT
165  ENSURE_MSAN_INITED();
166  SIZE_T n = REAL(strlen)(src);
167  char *res = REAL(strcpy)(dest, src);  // NOLINT
168  __msan_copy_poison(dest, src, n + 1);
169  return res;
170}
171
172INTERCEPTOR(char *, strncpy, char *dest, const char *src, SIZE_T n) {  // NOLINT
173  ENSURE_MSAN_INITED();
174  SIZE_T copy_size = REAL(strnlen)(src, n);
175  if (copy_size < n)
176    copy_size++;  // trailing \0
177  char *res = REAL(strncpy)(dest, src, n);  // NOLINT
178  __msan_copy_poison(dest, src, copy_size);
179  return res;
180}
181
182INTERCEPTOR(char *, strdup, char *src) {
183  ENSURE_MSAN_INITED();
184  SIZE_T n = REAL(strlen)(src);
185  char *res = REAL(strdup)(src);
186  __msan_copy_poison(res, src, n + 1);
187  return res;
188}
189
190INTERCEPTOR(char *, __strdup, char *src) {
191  ENSURE_MSAN_INITED();
192  SIZE_T n = REAL(strlen)(src);
193  char *res = REAL(__strdup)(src);
194  __msan_copy_poison(res, src, n + 1);
195  return res;
196}
197
198INTERCEPTOR(char *, strndup, char *src, SIZE_T n) {
199  ENSURE_MSAN_INITED();
200  SIZE_T copy_size = REAL(strnlen)(src, n);
201  char *res = REAL(strndup)(src, n);
202  __msan_copy_poison(res, src, copy_size);
203  __msan_unpoison(res + copy_size, 1); // \0
204  return res;
205}
206
207INTERCEPTOR(char *, __strndup, char *src, SIZE_T n) {
208  ENSURE_MSAN_INITED();
209  SIZE_T copy_size = REAL(strnlen)(src, n);
210  char *res = REAL(__strndup)(src, n);
211  __msan_copy_poison(res, src, copy_size);
212  __msan_unpoison(res + copy_size, 1); // \0
213  return res;
214}
215
216INTERCEPTOR(char *, gcvt, double number, SIZE_T ndigit, char *buf) {
217  ENSURE_MSAN_INITED();
218  char *res = REAL(gcvt)(number, ndigit, buf);
219  // DynamoRio tool will take care of unpoisoning gcvt result for us.
220  if (!__msan_has_dynamic_component()) {
221    SIZE_T n = REAL(strlen)(buf);
222    __msan_unpoison(buf, n + 1);
223  }
224  return res;
225}
226
227INTERCEPTOR(char *, strcat, char *dest, const char *src) {  // NOLINT
228  ENSURE_MSAN_INITED();
229  SIZE_T src_size = REAL(strlen)(src);
230  SIZE_T dest_size = REAL(strlen)(dest);
231  char *res = REAL(strcat)(dest, src);  // NOLINT
232  __msan_copy_poison(dest + dest_size, src, src_size + 1);
233  return res;
234}
235
236INTERCEPTOR(char *, strncat, char *dest, const char *src, SIZE_T n) {  // NOLINT
237  ENSURE_MSAN_INITED();
238  SIZE_T dest_size = REAL(strlen)(dest);
239  SIZE_T copy_size = REAL(strlen)(src);
240  if (copy_size < n)
241    copy_size++;  // trailing \0
242  char *res = REAL(strncat)(dest, src, n);  // NOLINT
243  __msan_copy_poison(dest + dest_size, src, copy_size);
244  return res;
245}
246
247INTERCEPTOR(long, strtol, const char *nptr, char **endptr,  // NOLINT
248            int base) {
249  ENSURE_MSAN_INITED();
250  long res = REAL(strtol)(nptr, endptr, base);  // NOLINT
251  if (!__msan_has_dynamic_component()) {
252    __msan_unpoison(endptr, sizeof(*endptr));
253  }
254  return res;
255}
256
257INTERCEPTOR(long long, strtoll, const char *nptr, char **endptr,  // NOLINT
258            int base) {
259  ENSURE_MSAN_INITED();
260  long res = REAL(strtoll)(nptr, endptr, base);  //NOLINT
261  if (!__msan_has_dynamic_component()) {
262    __msan_unpoison(endptr, sizeof(*endptr));
263  }
264  return res;
265}
266
267INTERCEPTOR(unsigned long, strtoul, const char *nptr, char **endptr,  // NOLINT
268            int base) {
269  ENSURE_MSAN_INITED();
270  unsigned long res = REAL(strtoul)(nptr, endptr, base);  // NOLINT
271  if (!__msan_has_dynamic_component()) {
272    __msan_unpoison(endptr, sizeof(*endptr));
273  }
274  return res;
275}
276
277INTERCEPTOR(unsigned long long, strtoull, const char *nptr,  // NOLINT
278            char **endptr, int base) {
279  ENSURE_MSAN_INITED();
280  unsigned long res = REAL(strtoull)(nptr, endptr, base);  // NOLINT
281  if (!__msan_has_dynamic_component()) {
282    __msan_unpoison(endptr, sizeof(*endptr));
283  }
284  return res;
285}
286
287INTERCEPTOR(double, strtod, const char *nptr, char **endptr) {  // NOLINT
288  ENSURE_MSAN_INITED();
289  double res = REAL(strtod)(nptr, endptr);  // NOLINT
290  if (!__msan_has_dynamic_component()) {
291    __msan_unpoison(endptr, sizeof(*endptr));
292  }
293  return res;
294}
295
296INTERCEPTOR(float, strtof, const char *nptr, char **endptr) {  // NOLINT
297  ENSURE_MSAN_INITED();
298  float res = REAL(strtof)(nptr, endptr);  // NOLINT
299  if (!__msan_has_dynamic_component()) {
300    __msan_unpoison(endptr, sizeof(*endptr));
301  }
302  return res;
303}
304
305INTERCEPTOR(long double, strtold, const char *nptr, char **endptr) {  // NOLINT
306  ENSURE_MSAN_INITED();
307  long double res = REAL(strtold)(nptr, endptr);  // NOLINT
308  if (!__msan_has_dynamic_component()) {
309    __msan_unpoison(endptr, sizeof(*endptr));
310  }
311  return res;
312}
313
314INTERCEPTOR(int, vasprintf, char **strp, const char *format, va_list ap) {
315  ENSURE_MSAN_INITED();
316  int res = REAL(vasprintf)(strp, format, ap);
317  if (res >= 0 && !__msan_has_dynamic_component()) {
318    __msan_unpoison(strp, sizeof(*strp));
319    __msan_unpoison(*strp, res + 1);
320  }
321  return res;
322}
323
324INTERCEPTOR(int, asprintf, char **strp, const char *format, ...) {  // NOLINT
325  ENSURE_MSAN_INITED();
326  va_list ap;
327  va_start(ap, format);
328  int res = vasprintf(strp, format, ap);  // NOLINT
329  va_end(ap);
330  return res;
331}
332
333INTERCEPTOR(int, vsnprintf, char *str, uptr size,
334            const char *format, va_list ap) {
335  ENSURE_MSAN_INITED();
336  int res = REAL(vsnprintf)(str, size, format, ap);
337  if (res >= 0 && !__msan_has_dynamic_component()) {
338    __msan_unpoison(str, res + 1);
339  }
340  return res;
341}
342
343INTERCEPTOR(int, vsprintf, char *str, const char *format, va_list ap) {
344  ENSURE_MSAN_INITED();
345  int res = REAL(vsprintf)(str, format, ap);
346  if (res >= 0 && !__msan_has_dynamic_component()) {
347    __msan_unpoison(str, res + 1);
348  }
349  return res;
350}
351
352INTERCEPTOR(int, vswprintf, void *str, uptr size, void *format, va_list ap) {
353  ENSURE_MSAN_INITED();
354  int res = REAL(vswprintf)(str, size, format, ap);
355  if (res >= 0 && !__msan_has_dynamic_component()) {
356    __msan_unpoison(str, 4 * (res + 1));
357  }
358  return res;
359}
360
361INTERCEPTOR(int, sprintf, char *str, const char *format, ...) {  // NOLINT
362  ENSURE_MSAN_INITED();
363  va_list ap;
364  va_start(ap, format);
365  int res = vsprintf(str, format, ap);  // NOLINT
366  va_end(ap);
367  return res;
368}
369
370INTERCEPTOR(int, snprintf, char *str, uptr size, const char *format, ...) {
371  ENSURE_MSAN_INITED();
372  va_list ap;
373  va_start(ap, format);
374  int res = vsnprintf(str, size, format, ap);
375  va_end(ap);
376  return res;
377}
378
379INTERCEPTOR(int, swprintf, void *str, uptr size, void *format, ...) {
380  ENSURE_MSAN_INITED();
381  va_list ap;
382  va_start(ap, format);
383  int res = vswprintf(str, size, format, ap);
384  va_end(ap);
385  return res;
386}
387
388// SIZE_T strftime(char *s, SIZE_T max, const char *format,const struct tm *tm);
389INTERCEPTOR(SIZE_T, strftime, char *s, SIZE_T max, const char *format,
390            void *tm) {
391  ENSURE_MSAN_INITED();
392  SIZE_T res = REAL(strftime)(s, max, format, tm);
393  if (res) __msan_unpoison(s, res + 1);
394  return res;
395}
396
397INTERCEPTOR(SIZE_T, wcstombs, void *dest, void *src, SIZE_T size) {
398  ENSURE_MSAN_INITED();
399  SIZE_T res = REAL(wcstombs)(dest, src, size);
400  if (res != (SIZE_T)-1) __msan_unpoison(dest, res + 1);
401  return res;
402}
403
404// SIZE_T mbstowcs(wchar_t *dest, const char *src, SIZE_T n);
405INTERCEPTOR(SIZE_T, mbstowcs, wchar_t *dest, const char *src, SIZE_T n) {
406  ENSURE_MSAN_INITED();
407  SIZE_T res = REAL(mbstowcs)(dest, src, n);
408  if (res != (SIZE_T)-1) __msan_unpoison(dest, (res + 1) * sizeof(wchar_t));
409  return res;
410}
411
412INTERCEPTOR(SIZE_T, wcslen, const wchar_t *s) {
413  ENSURE_MSAN_INITED();
414  SIZE_T res = REAL(wcslen)(s);
415  CHECK_UNPOISONED(s, sizeof(wchar_t) * (res + 1));
416  return res;
417}
418
419// wchar_t *wcschr(const wchar_t *wcs, wchar_t wc);
420INTERCEPTOR(wchar_t *, wcschr, void *s, wchar_t wc, void *ps) {
421  ENSURE_MSAN_INITED();
422  wchar_t *res = REAL(wcschr)(s, wc, ps);
423  return res;
424}
425
426// wchar_t *wcscpy(wchar_t *dest, const wchar_t *src);
427INTERCEPTOR(wchar_t *, wcscpy, wchar_t *dest, const wchar_t *src) {
428  ENSURE_MSAN_INITED();
429  wchar_t *res = REAL(wcscpy)(dest, src);
430  __msan_copy_poison(dest, src, sizeof(wchar_t) * (REAL(wcslen)(src) + 1));
431  return res;
432}
433
434// wchar_t *wmemcpy(wchar_t *dest, const wchar_t *src, SIZE_T n);
435INTERCEPTOR(wchar_t *, wmemcpy, wchar_t *dest, const wchar_t *src, SIZE_T n) {
436  ENSURE_MSAN_INITED();
437  wchar_t *res = REAL(wmemcpy)(dest, src, n);
438  __msan_copy_poison(dest, src, n * sizeof(wchar_t));
439  return res;
440}
441
442INTERCEPTOR(wchar_t *, wmemset, wchar_t *s, wchar_t c, SIZE_T n) {
443  CHECK(MEM_IS_APP(s));
444  ENSURE_MSAN_INITED();
445  wchar_t *res = (wchar_t *)fast_memset(s, c, n * sizeof(wchar_t));
446  __msan_unpoison(s, n * sizeof(wchar_t));
447  return res;
448}
449
450INTERCEPTOR(wchar_t *, wmemmove, wchar_t *dest, const wchar_t *src, SIZE_T n) {
451  ENSURE_MSAN_INITED();
452  wchar_t *res = REAL(wmemmove)(dest, src, n);
453  __msan_move_poison(dest, src, n * sizeof(wchar_t));
454  return res;
455}
456
457INTERCEPTOR(int, wcscmp, const wchar_t *s1, const wchar_t *s2) {
458  ENSURE_MSAN_INITED();
459  int res = REAL(wcscmp)(s1, s2);
460  return res;
461}
462
463INTERCEPTOR(double, wcstod, const wchar_t *nptr, wchar_t **endptr) {
464  ENSURE_MSAN_INITED();
465  double res = REAL(wcstod)(nptr, endptr);
466  __msan_unpoison(endptr, sizeof(*endptr));
467  return res;
468}
469
470// #define UNSUPPORTED(name) \
471//   INTERCEPTOR(void, name, void) {                     \
472//     Printf("MSAN: Unsupported %s\n", __FUNCTION__);   \
473//     Die();                                            \
474//   }
475
476// FIXME: intercept the following functions:
477// Note, they only matter when running without a dynamic tool.
478// UNSUPPORTED(wcscoll_l)
479// UNSUPPORTED(wcsnrtombs)
480// UNSUPPORTED(wcstol)
481// UNSUPPORTED(wcstoll)
482// UNSUPPORTED(wcstold)
483// UNSUPPORTED(wcstoul)
484// UNSUPPORTED(wcstoull)
485// UNSUPPORTED(wcsxfrm_l)
486// UNSUPPORTED(wcsdup)
487// UNSUPPORTED(wcsftime)
488// UNSUPPORTED(wcsstr)
489// UNSUPPORTED(wcsrchr)
490// UNSUPPORTED(wctob)
491
492INTERCEPTOR(int, gettimeofday, void *tv, void *tz) {
493  ENSURE_MSAN_INITED();
494  int res = REAL(gettimeofday)(tv, tz);
495  if (tv)
496    __msan_unpoison(tv, 16);
497  if (tz)
498    __msan_unpoison(tz, 8);
499  return res;
500}
501
502INTERCEPTOR(char *, fcvt, double x, int a, int *b, int *c) {
503  ENSURE_MSAN_INITED();
504  char *res = REAL(fcvt)(x, a, b, c);
505  if (!__msan_has_dynamic_component()) {
506    __msan_unpoison(b, sizeof(*b));
507    __msan_unpoison(c, sizeof(*c));
508  }
509  return res;
510}
511
512INTERCEPTOR(char *, getenv, char *name) {
513  ENSURE_MSAN_INITED();
514  char *res = REAL(getenv)(name);
515  if (!__msan_has_dynamic_component()) {
516    if (res)
517      __msan_unpoison(res, REAL(strlen)(res) + 1);
518  }
519  return res;
520}
521
522INTERCEPTOR(int, __fxstat, int magic, int fd, void *buf) {
523  ENSURE_MSAN_INITED();
524  int res = REAL(__fxstat)(magic, fd, buf);
525  if (!res)
526    __msan_unpoison(buf, __sanitizer::struct_stat_sz);
527  return res;
528}
529
530INTERCEPTOR(int, __fxstat64, int magic, int fd, void *buf) {
531  ENSURE_MSAN_INITED();
532  int res = REAL(__fxstat64)(magic, fd, buf);
533  if (!res)
534    __msan_unpoison(buf, __sanitizer::struct_stat64_sz);
535  return res;
536}
537
538INTERCEPTOR(int, __xstat, int magic, char *path, void *buf) {
539  ENSURE_MSAN_INITED();
540  int res = REAL(__xstat)(magic, path, buf);
541  if (!res)
542    __msan_unpoison(buf, __sanitizer::struct_stat_sz);
543  return res;
544}
545
546INTERCEPTOR(int, __xstat64, int magic, char *path, void *buf) {
547  ENSURE_MSAN_INITED();
548  int res = REAL(__xstat64)(magic, path, buf);
549  if (!res)
550    __msan_unpoison(buf, __sanitizer::struct_stat64_sz);
551  return res;
552}
553
554INTERCEPTOR(int, __lxstat, int magic, char *path, void *buf) {
555  ENSURE_MSAN_INITED();
556  int res = REAL(__lxstat)(magic, path, buf);
557  if (!res)
558    __msan_unpoison(buf, __sanitizer::struct_stat_sz);
559  return res;
560}
561
562INTERCEPTOR(int, __lxstat64, int magic, char *path, void *buf) {
563  ENSURE_MSAN_INITED();
564  int res = REAL(__lxstat64)(magic, path, buf);
565  if (!res)
566    __msan_unpoison(buf, __sanitizer::struct_stat64_sz);
567  return res;
568}
569
570INTERCEPTOR(int, pipe, int pipefd[2]) {
571  if (msan_init_is_running)
572    return REAL(pipe)(pipefd);
573  ENSURE_MSAN_INITED();
574  int res = REAL(pipe)(pipefd);
575  if (!res)
576    __msan_unpoison(pipefd, sizeof(int[2]));
577  return res;
578}
579
580INTERCEPTOR(int, pipe2, int pipefd[2], int flags) {
581  ENSURE_MSAN_INITED();
582  int res = REAL(pipe2)(pipefd, flags);
583  if (!res)
584    __msan_unpoison(pipefd, sizeof(int[2]));
585  return res;
586}
587
588INTERCEPTOR(int, socketpair, int domain, int type, int protocol, int sv[2]) {
589  ENSURE_MSAN_INITED();
590  int res = REAL(socketpair)(domain, type, protocol, sv);
591  if (!res)
592    __msan_unpoison(sv, sizeof(int[2]));
593  return res;
594}
595
596INTERCEPTOR(char *, fgets, char *s, int size, void *stream) {
597  ENSURE_MSAN_INITED();
598  char *res = REAL(fgets)(s, size, stream);
599  if (res)
600    __msan_unpoison(s, REAL(strlen)(s) + 1);
601  return res;
602}
603
604INTERCEPTOR(char *, fgets_unlocked, char *s, int size, void *stream) {
605  ENSURE_MSAN_INITED();
606  char *res = REAL(fgets_unlocked)(s, size, stream);
607  if (res)
608    __msan_unpoison(s, REAL(strlen)(s) + 1);
609  return res;
610}
611
612INTERCEPTOR(char *, getcwd, char *buf, SIZE_T size) {
613  ENSURE_MSAN_INITED();
614  char *res = REAL(getcwd)(buf, size);
615  if (res)
616    __msan_unpoison(res, REAL(strlen)(res) + 1);
617  return res;
618}
619
620INTERCEPTOR(char *, realpath, char *path, char *abspath) {
621  ENSURE_MSAN_INITED();
622  char *res = REAL(realpath)(path, abspath);
623  if (res)
624    __msan_unpoison(abspath, REAL(strlen)(abspath) + 1);
625  return res;
626}
627
628INTERCEPTOR(int, getrlimit, int resource, void *rlim) {
629  if (msan_init_is_running)
630    return REAL(getrlimit)(resource, rlim);
631  ENSURE_MSAN_INITED();
632  int res = REAL(getrlimit)(resource, rlim);
633  if (!res)
634    __msan_unpoison(rlim, __sanitizer::struct_rlimit_sz);
635  return res;
636}
637
638INTERCEPTOR(int, getrlimit64, int resource, void *rlim) {
639  if (msan_init_is_running)
640    return REAL(getrlimit64)(resource, rlim);
641  ENSURE_MSAN_INITED();
642  int res = REAL(getrlimit64)(resource, rlim);
643  if (!res)
644    __msan_unpoison(rlim, __sanitizer::struct_rlimit64_sz);
645  return res;
646}
647
648INTERCEPTOR(int, statfs, const char *s, void *buf) {
649  ENSURE_MSAN_INITED();
650  int res = REAL(statfs)(s, buf);
651  if (!res)
652    __msan_unpoison(buf, __sanitizer::struct_statfs_sz);
653  return res;
654}
655
656INTERCEPTOR(int, fstatfs, int fd, void *buf) {
657  ENSURE_MSAN_INITED();
658  int res = REAL(fstatfs)(fd, buf);
659  if (!res)
660    __msan_unpoison(buf, __sanitizer::struct_statfs_sz);
661  return res;
662}
663
664INTERCEPTOR(int, statfs64, const char *s, void *buf) {
665  ENSURE_MSAN_INITED();
666  int res = REAL(statfs64)(s, buf);
667  if (!res)
668    __msan_unpoison(buf, __sanitizer::struct_statfs64_sz);
669  return res;
670}
671
672INTERCEPTOR(int, fstatfs64, int fd, void *buf) {
673  ENSURE_MSAN_INITED();
674  int res = REAL(fstatfs64)(fd, buf);
675  if (!res)
676    __msan_unpoison(buf, __sanitizer::struct_statfs64_sz);
677  return res;
678}
679
680INTERCEPTOR(int, uname, void *utsname) {
681  ENSURE_MSAN_INITED();
682  int res = REAL(uname)(utsname);
683  if (!res) {
684    __msan_unpoison(utsname, __sanitizer::struct_utsname_sz);
685  }
686  return res;
687}
688
689INTERCEPTOR(int, gethostname, char *name, SIZE_T len) {
690  ENSURE_MSAN_INITED();
691  int res = REAL(gethostname)(name, len);
692  if (!res) {
693    SIZE_T real_len = REAL(strnlen)(name, len);
694    if (real_len < len)
695      ++real_len;
696    __msan_unpoison(name, real_len);
697  }
698  return res;
699}
700
701INTERCEPTOR(int, epoll_wait, int epfd, void *events, int maxevents,
702    int timeout) {
703  ENSURE_MSAN_INITED();
704  int res = REAL(epoll_wait)(epfd, events, maxevents, timeout);
705  if (res > 0) {
706    __msan_unpoison(events, __sanitizer::struct_epoll_event_sz * res);
707  }
708  return res;
709}
710
711INTERCEPTOR(int, epoll_pwait, int epfd, void *events, int maxevents,
712    int timeout, void *sigmask) {
713  ENSURE_MSAN_INITED();
714  int res = REAL(epoll_pwait)(epfd, events, maxevents, timeout, sigmask);
715  if (res > 0) {
716    __msan_unpoison(events, __sanitizer::struct_epoll_event_sz * res);
717  }
718  return res;
719}
720
721INTERCEPTOR(SSIZE_T, recv, int fd, void *buf, SIZE_T len, int flags) {
722  ENSURE_MSAN_INITED();
723  SSIZE_T res = REAL(recv)(fd, buf, len, flags);
724  if (res > 0)
725    __msan_unpoison(buf, res);
726  return res;
727}
728
729INTERCEPTOR(SSIZE_T, recvfrom, int fd, void *buf, SIZE_T len, int flags,
730            void *srcaddr, int *addrlen) {
731  ENSURE_MSAN_INITED();
732  SIZE_T srcaddr_sz;
733  if (srcaddr) srcaddr_sz = *addrlen;
734  SSIZE_T res = REAL(recvfrom)(fd, buf, len, flags, srcaddr, addrlen);
735  if (res > 0) {
736    __msan_unpoison(buf, res);
737    if (srcaddr) {
738      SIZE_T sz = *addrlen;
739      __msan_unpoison(srcaddr, (sz < srcaddr_sz) ? sz : srcaddr_sz);
740    }
741  }
742  return res;
743}
744
745INTERCEPTOR(void *, calloc, SIZE_T nmemb, SIZE_T size) {
746  if (CallocShouldReturnNullDueToOverflow(size, nmemb)) return 0;
747  GET_MALLOC_STACK_TRACE;
748  if (!msan_inited) {
749    // Hack: dlsym calls calloc before REAL(calloc) is retrieved from dlsym.
750    const SIZE_T kCallocPoolSize = 1024;
751    static uptr calloc_memory_for_dlsym[kCallocPoolSize];
752    static SIZE_T allocated;
753    SIZE_T size_in_words = ((nmemb * size) + kWordSize - 1) / kWordSize;
754    void *mem = (void*)&calloc_memory_for_dlsym[allocated];
755    allocated += size_in_words;
756    CHECK(allocated < kCallocPoolSize);
757    return mem;
758  }
759  return MsanReallocate(&stack, 0, nmemb * size, sizeof(u64), true);
760}
761
762INTERCEPTOR(void *, realloc, void *ptr, SIZE_T size) {
763  GET_MALLOC_STACK_TRACE;
764  return MsanReallocate(&stack, ptr, size, sizeof(u64), false);
765}
766
767INTERCEPTOR(void *, malloc, SIZE_T size) {
768  GET_MALLOC_STACK_TRACE;
769  return MsanReallocate(&stack, 0, size, sizeof(u64), false);
770}
771
772void __msan_allocated_memory(const void* data, uptr size) {
773  GET_MALLOC_STACK_TRACE;
774  if (flags()->poison_in_malloc)
775    __msan_poison(data, size);
776  if (__msan_get_track_origins()) {
777    u32 stack_id = StackDepotPut(stack.trace, stack.size);
778    CHECK(stack_id);
779    CHECK_EQ((stack_id >> 31), 0);  // Higher bit is occupied by stack origins.
780    __msan_set_origin(data, size, stack_id);
781  }
782}
783
784INTERCEPTOR(void *, mmap, void *addr, SIZE_T length, int prot, int flags,
785            int fd, OFF_T offset) {
786  ENSURE_MSAN_INITED();
787  void *res = REAL(mmap)(addr, length, prot, flags, fd, offset);
788  if (res != (void*)-1)
789    __msan_unpoison(res, RoundUpTo(length, GetPageSize()));
790  return res;
791}
792
793INTERCEPTOR(void *, mmap64, void *addr, SIZE_T length, int prot, int flags,
794            int fd, OFF64_T offset) {
795  ENSURE_MSAN_INITED();
796  void *res = REAL(mmap64)(addr, length, prot, flags, fd, offset);
797  if (res != (void*)-1)
798    __msan_unpoison(res, RoundUpTo(length, GetPageSize()));
799  return res;
800}
801
802struct dlinfo {
803  char *dli_fname;
804  void *dli_fbase;
805  char *dli_sname;
806  void *dli_saddr;
807};
808
809INTERCEPTOR(int, dladdr, void *addr, dlinfo *info) {
810  ENSURE_MSAN_INITED();
811  int res = REAL(dladdr)(addr, info);
812  if (res != 0) {
813    __msan_unpoison(info, sizeof(*info));
814    if (info->dli_fname)
815      __msan_unpoison(info->dli_fname, REAL(strlen)(info->dli_fname) + 1);
816    if (info->dli_sname)
817      __msan_unpoison(info->dli_sname, REAL(strlen)(info->dli_sname) + 1);
818  }
819  return res;
820}
821
822// dlopen() ultimately calls mmap() down inside the loader, which generally
823// doesn't participate in dynamic symbol resolution.  Therefore we won't
824// intercept its calls to mmap, and we have to hook it here.  The loader
825// initializes the module before returning, so without the dynamic component, we
826// won't be able to clear the shadow before the initializers.  Fixing this would
827// require putting our own initializer first to clear the shadow.
828INTERCEPTOR(void *, dlopen, const char *filename, int flag) {
829  ENSURE_MSAN_INITED();
830  EnterLoader();
831  link_map *map = (link_map *)REAL(dlopen)(filename, flag);
832  ExitLoader();
833  if (!__msan_has_dynamic_component() && map) {
834    // If msandr didn't clear the shadow before the initializers ran, we do it
835    // ourselves afterwards.
836    UnpoisonMappedDSO(map);
837  }
838  return (void *)map;
839}
840
841typedef int (*dl_iterate_phdr_cb)(__sanitizer_dl_phdr_info *info, SIZE_T size,
842                                  void *data);
843struct dl_iterate_phdr_data {
844  dl_iterate_phdr_cb callback;
845  void *data;
846};
847
848static int msan_dl_iterate_phdr_cb(__sanitizer_dl_phdr_info *info, SIZE_T size,
849                                   void *data) {
850  if (info) {
851    __msan_unpoison(info, size);
852    if (info->dlpi_name)
853      __msan_unpoison(info->dlpi_name, REAL(strlen)(info->dlpi_name) + 1);
854  }
855  dl_iterate_phdr_data *cbdata = (dl_iterate_phdr_data *)data;
856  __msan_unpoison_param(3);
857  return cbdata->callback(info, size, cbdata->data);
858}
859
860INTERCEPTOR(int, dl_iterate_phdr, dl_iterate_phdr_cb callback, void *data) {
861  ENSURE_MSAN_INITED();
862  EnterLoader();
863  dl_iterate_phdr_data cbdata;
864  cbdata.callback = callback;
865  cbdata.data = data;
866  int res = REAL(dl_iterate_phdr)(msan_dl_iterate_phdr_cb, (void *)&cbdata);
867  ExitLoader();
868  return res;
869}
870
871INTERCEPTOR(int, getrusage, int who, void *usage) {
872  ENSURE_MSAN_INITED();
873  int res = REAL(getrusage)(who, usage);
874  if (res == 0) {
875    __msan_unpoison(usage, __sanitizer::struct_rusage_sz);
876  }
877  return res;
878}
879
880const int kMaxSignals = 1024;
881static uptr sigactions[kMaxSignals];
882static StaticSpinMutex sigactions_mu;
883
884static void SignalHandler(int signo) {
885  typedef void (*signal_cb)(int x);
886  signal_cb cb = (signal_cb)sigactions[signo];
887  cb(signo);
888}
889
890static void SignalAction(int signo, void *si, void *uc) {
891  __msan_unpoison(si, __sanitizer::struct_sigaction_sz);
892  __msan_unpoison(uc, __sanitizer::ucontext_t_sz);
893
894  typedef void (*sigaction_cb)(int, void *, void *);
895  sigaction_cb cb = (sigaction_cb)sigactions[signo];
896  cb(signo, si, uc);
897}
898
899INTERCEPTOR(int, sigaction, int signo, const __sanitizer_sigaction *act,
900            __sanitizer_sigaction *oldact) {
901  ENSURE_MSAN_INITED();
902  // FIXME: check that *act is unpoisoned.
903  // That requires intercepting all of sigemptyset, sigfillset, etc.
904  int res;
905  if (flags()->wrap_signals) {
906    SpinMutexLock lock(&sigactions_mu);
907    CHECK_LT(signo, kMaxSignals);
908    uptr old_cb = sigactions[signo];
909    __sanitizer_sigaction new_act;
910    __sanitizer_sigaction *pnew_act = act ? &new_act : 0;
911    if (act) {
912      internal_memcpy(pnew_act, act, __sanitizer::struct_sigaction_sz);
913      uptr cb = __sanitizer::__sanitizer_get_sigaction_sa_sigaction(pnew_act);
914      uptr new_cb =
915          __sanitizer::__sanitizer_get_sigaction_sa_siginfo(pnew_act) ?
916          (uptr)SignalAction : (uptr)SignalHandler;
917      if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) {
918        sigactions[signo] = cb;
919        __sanitizer::__sanitizer_set_sigaction_sa_sigaction(pnew_act, new_cb);
920      }
921    }
922    res = REAL(sigaction)(signo, pnew_act, oldact);
923    if (res == 0 && oldact) {
924      uptr cb = __sanitizer::__sanitizer_get_sigaction_sa_sigaction(oldact);
925      if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) {
926        __sanitizer::__sanitizer_set_sigaction_sa_sigaction(oldact, old_cb);
927      }
928    }
929  } else {
930    res = REAL(sigaction)(signo, act, oldact);
931  }
932
933  if (res == 0 && oldact) {
934    __msan_unpoison(oldact, __sanitizer::struct_sigaction_sz);
935  }
936  return res;
937}
938
939INTERCEPTOR(int, signal, int signo, uptr cb) {
940  ENSURE_MSAN_INITED();
941  if (flags()->wrap_signals) {
942    CHECK_LT(signo, kMaxSignals);
943    SpinMutexLock lock(&sigactions_mu);
944    if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) {
945      sigactions[signo] = cb;
946      cb = (uptr) SignalHandler;
947    }
948    return REAL(signal)(signo, cb);
949  } else {
950    return REAL(signal)(signo, cb);
951  }
952}
953
954extern "C" int pthread_attr_init(void *attr);
955extern "C" int pthread_attr_destroy(void *attr);
956extern "C" int pthread_attr_setstacksize(void *attr, uptr stacksize);
957extern "C" int pthread_attr_getstack(void *attr, uptr *stack, uptr *stacksize);
958
959INTERCEPTOR(int, pthread_create, void *th, void *attr, void *(*callback)(void*),
960            void * param) {
961  ENSURE_MSAN_INITED(); // for GetTlsSize()
962  __sanitizer_pthread_attr_t myattr;
963  if (attr == 0) {
964    pthread_attr_init(&myattr);
965    attr = &myattr;
966  }
967
968  AdjustStackSizeLinux(attr, flags()->verbosity);
969
970  int res = REAL(pthread_create)(th, attr, callback, param);
971  if (attr == &myattr)
972    pthread_attr_destroy(&myattr);
973  if (!res) {
974    __msan_unpoison(th, __sanitizer::pthread_t_sz);
975  }
976  return res;
977}
978
979struct MSanInterceptorContext {
980  bool in_interceptor_scope;
981};
982
983// A version of CHECK_UNPOISED using a saved scope value. Used in common
984// interceptors.
985#define CHECK_UNPOISONED_CTX(ctx, x, n)                        \
986  if (!((MSanInterceptorContext *) ctx)->in_interceptor_scope) \
987    CHECK_UNPOISONED_0(x, n);
988
989#define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \
990  __msan_unpoison(ptr, size)
991#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) \
992  CHECK_UNPOISONED_CTX(ctx, ptr, size);
993#define COMMON_INTERCEPTOR_ENTER(ctx, func, ...)              \
994  if (msan_init_is_running) return REAL(func)(__VA_ARGS__);   \
995  MSanInterceptorContext msan_ctx = {IsInInterceptorScope()}; \
996  ctx = (void *)&msan_ctx;                                    \
997  InterceptorScope interceptor_scope;                         \
998  ENSURE_MSAN_INITED();
999#define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) \
1000  do {                                         \
1001  } while (false)
1002#define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd) \
1003  do {                                         \
1004  } while (false)
1005#define COMMON_INTERCEPTOR_FD_SOCKET_ACCEPT(ctx, fd, newfd) \
1006  do {                                                      \
1007  } while (false)
1008#define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name) \
1009  do {                                                \
1010  } while (false)  // FIXME
1011#include "sanitizer_common/sanitizer_common_interceptors.inc"
1012
1013#define COMMON_SYSCALL_PRE_READ_RANGE(p, s) CHECK_UNPOISONED(p, s)
1014#define COMMON_SYSCALL_PRE_WRITE_RANGE(p, s)
1015#define COMMON_SYSCALL_POST_READ_RANGE(p, s)
1016#define COMMON_SYSCALL_POST_WRITE_RANGE(p, s) __msan_unpoison(p, s)
1017#include "sanitizer_common/sanitizer_common_syscalls.inc"
1018
1019// static
1020void *fast_memset(void *ptr, int c, SIZE_T n) {
1021  // hack until we have a really fast internal_memset
1022  if (sizeof(uptr) == 8 &&
1023      (n % 8) == 0 &&
1024      ((uptr)ptr % 8) == 0 &&
1025      (c == 0 || c == -1)) {
1026    // Printf("memset %p %zd %x\n", ptr, n, c);
1027    uptr to_store = c ? -1L : 0L;
1028    uptr *p = (uptr*)ptr;
1029    for (SIZE_T i = 0; i < n / 8; i++)
1030      p[i] = to_store;
1031    return ptr;
1032  }
1033  return internal_memset(ptr, c, n);
1034}
1035
1036// static
1037void *fast_memcpy(void *dst, const void *src, SIZE_T n) {
1038  // Same hack as in fast_memset above.
1039  if (sizeof(uptr) == 8 &&
1040      (n % 8) == 0 &&
1041      ((uptr)dst % 8) == 0 &&
1042      ((uptr)src % 8) == 0) {
1043    uptr *d = (uptr*)dst;
1044    uptr *s = (uptr*)src;
1045    for (SIZE_T i = 0; i < n / 8; i++)
1046      d[i] = s[i];
1047    return dst;
1048  }
1049  return internal_memcpy(dst, src, n);
1050}
1051
1052// These interface functions reside here so that they can use
1053// fast_memset, etc.
1054void __msan_unpoison(const void *a, uptr size) {
1055  if (!MEM_IS_APP(a)) return;
1056  fast_memset((void*)MEM_TO_SHADOW((uptr)a), 0, size);
1057}
1058
1059void __msan_poison(const void *a, uptr size) {
1060  if (!MEM_IS_APP(a)) return;
1061  fast_memset((void*)MEM_TO_SHADOW((uptr)a),
1062              __msan::flags()->poison_heap_with_zeroes ? 0 : -1, size);
1063}
1064
1065void __msan_poison_stack(void *a, uptr size) {
1066  if (!MEM_IS_APP(a)) return;
1067  fast_memset((void*)MEM_TO_SHADOW((uptr)a),
1068              __msan::flags()->poison_stack_with_zeroes ? 0 : -1, size);
1069}
1070
1071void __msan_clear_and_unpoison(void *a, uptr size) {
1072  fast_memset(a, 0, size);
1073  fast_memset((void*)MEM_TO_SHADOW((uptr)a), 0, size);
1074}
1075
1076void __msan_copy_origin(void *dst, const void *src, uptr size) {
1077  if (!__msan_get_track_origins()) return;
1078  if (!MEM_IS_APP(dst) || !MEM_IS_APP(src)) return;
1079  uptr d = MEM_TO_ORIGIN(dst);
1080  uptr s = MEM_TO_ORIGIN(src);
1081  uptr beg = d & ~3UL;  // align down.
1082  uptr end = (d + size + 3) & ~3UL;  // align up.
1083  s = s & ~3UL;  // align down.
1084  fast_memcpy((void*)beg, (void*)s, end - beg);
1085}
1086
1087void __msan_copy_poison(void *dst, const void *src, uptr size) {
1088  if (!MEM_IS_APP(dst)) return;
1089  if (!MEM_IS_APP(src)) return;
1090  fast_memcpy((void*)MEM_TO_SHADOW((uptr)dst),
1091              (void*)MEM_TO_SHADOW((uptr)src), size);
1092  __msan_copy_origin(dst, src, size);
1093}
1094
1095void __msan_move_poison(void *dst, const void *src, uptr size) {
1096  if (!MEM_IS_APP(dst)) return;
1097  if (!MEM_IS_APP(src)) return;
1098  internal_memmove((void*)MEM_TO_SHADOW((uptr)dst),
1099         (void*)MEM_TO_SHADOW((uptr)src), size);
1100  __msan_copy_origin(dst, src, size);
1101}
1102
1103void *__msan_memcpy(void *dest, const void *src, SIZE_T n) {
1104  ENSURE_MSAN_INITED();
1105  void *res = fast_memcpy(dest, src, n);
1106  __msan_copy_poison(dest, src, n);
1107  return res;
1108}
1109
1110void *__msan_memset(void *s, int c, SIZE_T n) {
1111  ENSURE_MSAN_INITED();
1112  void *res = fast_memset(s, c, n);
1113  __msan_unpoison(s, n);
1114  return res;
1115}
1116
1117void *__msan_memmove(void *dest, const void *src, SIZE_T n) {
1118  ENSURE_MSAN_INITED();
1119  void *res = REAL(memmove)(dest, src, n);
1120  __msan_move_poison(dest, src, n);
1121  return res;
1122}
1123
1124namespace __msan {
1125void InitializeInterceptors() {
1126  static int inited = 0;
1127  CHECK_EQ(inited, 0);
1128  SANITIZER_COMMON_INTERCEPTORS_INIT;
1129
1130  INTERCEPT_FUNCTION(mmap);
1131  INTERCEPT_FUNCTION(mmap64);
1132  INTERCEPT_FUNCTION(posix_memalign);
1133  INTERCEPT_FUNCTION(malloc);
1134  INTERCEPT_FUNCTION(calloc);
1135  INTERCEPT_FUNCTION(realloc);
1136  INTERCEPT_FUNCTION(free);
1137  INTERCEPT_FUNCTION(fread);
1138  INTERCEPT_FUNCTION(fread_unlocked);
1139  INTERCEPT_FUNCTION(readlink);
1140  INTERCEPT_FUNCTION(readdir);
1141  INTERCEPT_FUNCTION(readdir64);
1142  INTERCEPT_FUNCTION(memcpy);
1143  INTERCEPT_FUNCTION(memset);
1144  INTERCEPT_FUNCTION(memmove);
1145  INTERCEPT_FUNCTION(wmemset);
1146  INTERCEPT_FUNCTION(wmemcpy);
1147  INTERCEPT_FUNCTION(wmemmove);
1148  INTERCEPT_FUNCTION(strcpy);  // NOLINT
1149  INTERCEPT_FUNCTION(strdup);
1150  INTERCEPT_FUNCTION(__strdup);
1151  INTERCEPT_FUNCTION(strndup);
1152  INTERCEPT_FUNCTION(__strndup);
1153  INTERCEPT_FUNCTION(strncpy);  // NOLINT
1154  INTERCEPT_FUNCTION(strlen);
1155  INTERCEPT_FUNCTION(strnlen);
1156  INTERCEPT_FUNCTION(gcvt);
1157  INTERCEPT_FUNCTION(strcat);  // NOLINT
1158  INTERCEPT_FUNCTION(strncat);  // NOLINT
1159  INTERCEPT_FUNCTION(strtol);
1160  INTERCEPT_FUNCTION(strtoll);
1161  INTERCEPT_FUNCTION(strtoul);
1162  INTERCEPT_FUNCTION(strtoull);
1163  INTERCEPT_FUNCTION(strtod);
1164  INTERCEPT_FUNCTION(strtof);
1165  INTERCEPT_FUNCTION(strtold);
1166  INTERCEPT_FUNCTION(vasprintf);
1167  INTERCEPT_FUNCTION(asprintf);
1168  INTERCEPT_FUNCTION(vsprintf);
1169  INTERCEPT_FUNCTION(vsnprintf);
1170  INTERCEPT_FUNCTION(vswprintf);
1171  INTERCEPT_FUNCTION(sprintf);  // NOLINT
1172  INTERCEPT_FUNCTION(snprintf);
1173  INTERCEPT_FUNCTION(swprintf);
1174  INTERCEPT_FUNCTION(strftime);
1175  INTERCEPT_FUNCTION(wcstombs);
1176  INTERCEPT_FUNCTION(mbstowcs);
1177  INTERCEPT_FUNCTION(wcslen);
1178  INTERCEPT_FUNCTION(wcschr);
1179  INTERCEPT_FUNCTION(wcscpy);
1180  INTERCEPT_FUNCTION(wcscmp);
1181  INTERCEPT_FUNCTION(wcstod);
1182  INTERCEPT_FUNCTION(getenv);
1183  INTERCEPT_FUNCTION(gettimeofday);
1184  INTERCEPT_FUNCTION(fcvt);
1185  INTERCEPT_FUNCTION(__fxstat);
1186  INTERCEPT_FUNCTION(__xstat);
1187  INTERCEPT_FUNCTION(__lxstat);
1188  INTERCEPT_FUNCTION(__fxstat64);
1189  INTERCEPT_FUNCTION(__xstat64);
1190  INTERCEPT_FUNCTION(__lxstat64);
1191  INTERCEPT_FUNCTION(pipe);
1192  INTERCEPT_FUNCTION(pipe2);
1193  INTERCEPT_FUNCTION(socketpair);
1194  INTERCEPT_FUNCTION(fgets);
1195  INTERCEPT_FUNCTION(fgets_unlocked);
1196  INTERCEPT_FUNCTION(getcwd);
1197  INTERCEPT_FUNCTION(realpath);
1198  INTERCEPT_FUNCTION(getrlimit);
1199  INTERCEPT_FUNCTION(getrlimit64);
1200  INTERCEPT_FUNCTION(statfs);
1201  INTERCEPT_FUNCTION(fstatfs);
1202  INTERCEPT_FUNCTION(statfs64);
1203  INTERCEPT_FUNCTION(fstatfs64);
1204  INTERCEPT_FUNCTION(uname);
1205  INTERCEPT_FUNCTION(gethostname);
1206  INTERCEPT_FUNCTION(epoll_wait);
1207  INTERCEPT_FUNCTION(epoll_pwait);
1208  INTERCEPT_FUNCTION(recv);
1209  INTERCEPT_FUNCTION(recvfrom);
1210  INTERCEPT_FUNCTION(dladdr);
1211  INTERCEPT_FUNCTION(dlopen);
1212  INTERCEPT_FUNCTION(dl_iterate_phdr);
1213  INTERCEPT_FUNCTION(getrusage);
1214  INTERCEPT_FUNCTION(sigaction);
1215  INTERCEPT_FUNCTION(signal);
1216  INTERCEPT_FUNCTION(pthread_create);
1217  inited = 1;
1218}
1219}  // namespace __msan
1220