msan_interceptors.cc revision c2918bf11fc65b1f9551eee03719e9bdf02eedd5 
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 *, memcpy, void *dest, const void *src, SIZE_T n) {
105  return __msan_memcpy(dest, src, n);
106}
107
108INTERCEPTOR(void *, memmove, void *dest, const void *src, SIZE_T n) {
109  return __msan_memmove(dest, src, n);
110}
111
112INTERCEPTOR(void *, memset, void *s, int c, SIZE_T n) {
113  return __msan_memset(s, c, n);
114}
115
116INTERCEPTOR(int, posix_memalign, void **memptr, SIZE_T alignment, SIZE_T size) {
117  GET_MALLOC_STACK_TRACE;
118  CHECK_EQ(alignment & (alignment - 1), 0);
119  CHECK_NE(memptr, 0);
120  *memptr = MsanReallocate(&stack, 0, size, alignment, false);
121  CHECK_NE(*memptr, 0);
122  __msan_unpoison(memptr, sizeof(*memptr));
123  return 0;
124}
125
126INTERCEPTOR(void, free, void *ptr) {
127  ENSURE_MSAN_INITED();
128  if (ptr == 0) return;
129  MsanDeallocate(ptr);
130}
131
132INTERCEPTOR(SIZE_T, strlen, const char *s) {
133  ENSURE_MSAN_INITED();
134  SIZE_T res = REAL(strlen)(s);
135  CHECK_UNPOISONED(s, res + 1);
136  return res;
137}
138
139INTERCEPTOR(SIZE_T, strnlen, const char *s, SIZE_T n) {
140  ENSURE_MSAN_INITED();
141  SIZE_T res = REAL(strnlen)(s, n);
142  SIZE_T scan_size = (res == n) ? res : res + 1;
143  CHECK_UNPOISONED(s, scan_size);
144  return res;
145}
146
147// FIXME: Add stricter shadow checks in str* interceptors (ex.: strcpy should
148// check the shadow of the terminating \0 byte).
149
150INTERCEPTOR(char *, strcpy, char *dest, const char *src) {  // NOLINT
151  ENSURE_MSAN_INITED();
152  SIZE_T n = REAL(strlen)(src);
153  char *res = REAL(strcpy)(dest, src);  // NOLINT
154  __msan_copy_poison(dest, src, n + 1);
155  return res;
156}
157
158INTERCEPTOR(char *, strncpy, char *dest, const char *src, SIZE_T n) {  // NOLINT
159  ENSURE_MSAN_INITED();
160  SIZE_T copy_size = REAL(strnlen)(src, n);
161  if (copy_size < n)
162    copy_size++;  // trailing \0
163  char *res = REAL(strncpy)(dest, src, n);  // NOLINT
164  __msan_copy_poison(dest, src, copy_size);
165  return res;
166}
167
168INTERCEPTOR(char *, strdup, char *src) {
169  ENSURE_MSAN_INITED();
170  SIZE_T n = REAL(strlen)(src);
171  char *res = REAL(strdup)(src);
172  __msan_copy_poison(res, src, n + 1);
173  return res;
174}
175
176INTERCEPTOR(char *, __strdup, char *src) {
177  ENSURE_MSAN_INITED();
178  SIZE_T n = REAL(strlen)(src);
179  char *res = REAL(__strdup)(src);
180  __msan_copy_poison(res, src, n + 1);
181  return res;
182}
183
184INTERCEPTOR(char *, strndup, char *src, SIZE_T n) {
185  ENSURE_MSAN_INITED();
186  SIZE_T copy_size = REAL(strnlen)(src, n);
187  char *res = REAL(strndup)(src, n);
188  __msan_copy_poison(res, src, copy_size);
189  __msan_unpoison(res + copy_size, 1); // \0
190  return res;
191}
192
193INTERCEPTOR(char *, __strndup, char *src, SIZE_T n) {
194  ENSURE_MSAN_INITED();
195  SIZE_T copy_size = REAL(strnlen)(src, n);
196  char *res = REAL(__strndup)(src, n);
197  __msan_copy_poison(res, src, copy_size);
198  __msan_unpoison(res + copy_size, 1); // \0
199  return res;
200}
201
202INTERCEPTOR(char *, gcvt, double number, SIZE_T ndigit, char *buf) {
203  ENSURE_MSAN_INITED();
204  char *res = REAL(gcvt)(number, ndigit, buf);
205  // DynamoRio tool will take care of unpoisoning gcvt result for us.
206  if (!__msan_has_dynamic_component()) {
207    SIZE_T n = REAL(strlen)(buf);
208    __msan_unpoison(buf, n + 1);
209  }
210  return res;
211}
212
213INTERCEPTOR(char *, strcat, char *dest, const char *src) {  // NOLINT
214  ENSURE_MSAN_INITED();
215  SIZE_T src_size = REAL(strlen)(src);
216  SIZE_T dest_size = REAL(strlen)(dest);
217  char *res = REAL(strcat)(dest, src);  // NOLINT
218  __msan_copy_poison(dest + dest_size, src, src_size + 1);
219  return res;
220}
221
222INTERCEPTOR(char *, strncat, char *dest, const char *src, SIZE_T n) {  // NOLINT
223  ENSURE_MSAN_INITED();
224  SIZE_T dest_size = REAL(strlen)(dest);
225  SIZE_T copy_size = REAL(strlen)(src);
226  if (copy_size < n)
227    copy_size++;  // trailing \0
228  char *res = REAL(strncat)(dest, src, n);  // NOLINT
229  __msan_copy_poison(dest + dest_size, src, copy_size);
230  return res;
231}
232
233INTERCEPTOR(long, strtol, const char *nptr, char **endptr,  // NOLINT
234            int base) {
235  ENSURE_MSAN_INITED();
236  long res = REAL(strtol)(nptr, endptr, base);  // NOLINT
237  if (!__msan_has_dynamic_component()) {
238    __msan_unpoison(endptr, sizeof(*endptr));
239  }
240  return res;
241}
242
243INTERCEPTOR(long long, strtoll, const char *nptr, char **endptr,  // NOLINT
244            int base) {
245  ENSURE_MSAN_INITED();
246  long res = REAL(strtoll)(nptr, endptr, base);  //NOLINT
247  if (!__msan_has_dynamic_component()) {
248    __msan_unpoison(endptr, sizeof(*endptr));
249  }
250  return res;
251}
252
253INTERCEPTOR(unsigned long, strtoul, const char *nptr, char **endptr,  // NOLINT
254            int base) {
255  ENSURE_MSAN_INITED();
256  unsigned long res = REAL(strtoul)(nptr, endptr, base);  // NOLINT
257  if (!__msan_has_dynamic_component()) {
258    __msan_unpoison(endptr, sizeof(*endptr));
259  }
260  return res;
261}
262
263INTERCEPTOR(unsigned long long, strtoull, const char *nptr,  // NOLINT
264            char **endptr, int base) {
265  ENSURE_MSAN_INITED();
266  unsigned long res = REAL(strtoull)(nptr, endptr, base);  // NOLINT
267  if (!__msan_has_dynamic_component()) {
268    __msan_unpoison(endptr, sizeof(*endptr));
269  }
270  return res;
271}
272
273INTERCEPTOR(double, strtod, const char *nptr, char **endptr) {  // NOLINT
274  ENSURE_MSAN_INITED();
275  double res = REAL(strtod)(nptr, endptr);  // NOLINT
276  if (!__msan_has_dynamic_component()) {
277    __msan_unpoison(endptr, sizeof(*endptr));
278  }
279  return res;
280}
281
282INTERCEPTOR(float, strtof, const char *nptr, char **endptr) {  // NOLINT
283  ENSURE_MSAN_INITED();
284  float res = REAL(strtof)(nptr, endptr);  // NOLINT
285  if (!__msan_has_dynamic_component()) {
286    __msan_unpoison(endptr, sizeof(*endptr));
287  }
288  return res;
289}
290
291INTERCEPTOR(long double, strtold, const char *nptr, char **endptr) {  // NOLINT
292  ENSURE_MSAN_INITED();
293  long double res = REAL(strtold)(nptr, endptr);  // NOLINT
294  if (!__msan_has_dynamic_component()) {
295    __msan_unpoison(endptr, sizeof(*endptr));
296  }
297  return res;
298}
299
300INTERCEPTOR(int, vasprintf, char **strp, const char *format, va_list ap) {
301  ENSURE_MSAN_INITED();
302  int res = REAL(vasprintf)(strp, format, ap);
303  if (res >= 0 && !__msan_has_dynamic_component()) {
304    __msan_unpoison(strp, sizeof(*strp));
305    __msan_unpoison(*strp, res + 1);
306  }
307  return res;
308}
309
310INTERCEPTOR(int, asprintf, char **strp, const char *format, ...) {  // NOLINT
311  ENSURE_MSAN_INITED();
312  va_list ap;
313  va_start(ap, format);
314  int res = vasprintf(strp, format, ap);  // NOLINT
315  va_end(ap);
316  return res;
317}
318
319INTERCEPTOR(int, vsnprintf, char *str, uptr size,
320            const char *format, va_list ap) {
321  ENSURE_MSAN_INITED();
322  int res = REAL(vsnprintf)(str, size, format, ap);
323  if (res >= 0 && !__msan_has_dynamic_component()) {
324    __msan_unpoison(str, res + 1);
325  }
326  return res;
327}
328
329INTERCEPTOR(int, vsprintf, char *str, const char *format, va_list ap) {
330  ENSURE_MSAN_INITED();
331  int res = REAL(vsprintf)(str, format, ap);
332  if (res >= 0 && !__msan_has_dynamic_component()) {
333    __msan_unpoison(str, res + 1);
334  }
335  return res;
336}
337
338INTERCEPTOR(int, vswprintf, void *str, uptr size, void *format, va_list ap) {
339  ENSURE_MSAN_INITED();
340  int res = REAL(vswprintf)(str, size, format, ap);
341  if (res >= 0 && !__msan_has_dynamic_component()) {
342    __msan_unpoison(str, 4 * (res + 1));
343  }
344  return res;
345}
346
347INTERCEPTOR(int, sprintf, char *str, const char *format, ...) {  // NOLINT
348  ENSURE_MSAN_INITED();
349  va_list ap;
350  va_start(ap, format);
351  int res = vsprintf(str, format, ap);  // NOLINT
352  va_end(ap);
353  return res;
354}
355
356INTERCEPTOR(int, snprintf, char *str, uptr size, const char *format, ...) {
357  ENSURE_MSAN_INITED();
358  va_list ap;
359  va_start(ap, format);
360  int res = vsnprintf(str, size, format, ap);
361  va_end(ap);
362  return res;
363}
364
365INTERCEPTOR(int, swprintf, void *str, uptr size, void *format, ...) {
366  ENSURE_MSAN_INITED();
367  va_list ap;
368  va_start(ap, format);
369  int res = vswprintf(str, size, format, ap);
370  va_end(ap);
371  return res;
372}
373
374// SIZE_T strftime(char *s, SIZE_T max, const char *format,const struct tm *tm);
375INTERCEPTOR(SIZE_T, strftime, char *s, SIZE_T max, const char *format,
376            void *tm) {
377  ENSURE_MSAN_INITED();
378  SIZE_T res = REAL(strftime)(s, max, format, tm);
379  if (res) __msan_unpoison(s, res + 1);
380  return res;
381}
382
383INTERCEPTOR(SIZE_T, wcstombs, void *dest, void *src, SIZE_T size) {
384  ENSURE_MSAN_INITED();
385  SIZE_T res = REAL(wcstombs)(dest, src, size);
386  if (res != (SIZE_T)-1) __msan_unpoison(dest, res + 1);
387  return res;
388}
389
390// SIZE_T mbstowcs(wchar_t *dest, const char *src, SIZE_T n);
391INTERCEPTOR(SIZE_T, mbstowcs, wchar_t *dest, const char *src, SIZE_T n) {
392  ENSURE_MSAN_INITED();
393  SIZE_T res = REAL(mbstowcs)(dest, src, n);
394  if (res != (SIZE_T)-1) __msan_unpoison(dest, (res + 1) * sizeof(wchar_t));
395  return res;
396}
397
398INTERCEPTOR(SIZE_T, wcslen, const wchar_t *s) {
399  ENSURE_MSAN_INITED();
400  SIZE_T res = REAL(wcslen)(s);
401  CHECK_UNPOISONED(s, sizeof(wchar_t) * (res + 1));
402  return res;
403}
404
405// wchar_t *wcschr(const wchar_t *wcs, wchar_t wc);
406INTERCEPTOR(wchar_t *, wcschr, void *s, wchar_t wc, void *ps) {
407  ENSURE_MSAN_INITED();
408  wchar_t *res = REAL(wcschr)(s, wc, ps);
409  return res;
410}
411
412// wchar_t *wcscpy(wchar_t *dest, const wchar_t *src);
413INTERCEPTOR(wchar_t *, wcscpy, wchar_t *dest, const wchar_t *src) {
414  ENSURE_MSAN_INITED();
415  wchar_t *res = REAL(wcscpy)(dest, src);
416  __msan_copy_poison(dest, src, sizeof(wchar_t) * (REAL(wcslen)(src) + 1));
417  return res;
418}
419
420// wchar_t *wmemcpy(wchar_t *dest, const wchar_t *src, SIZE_T n);
421INTERCEPTOR(wchar_t *, wmemcpy, wchar_t *dest, const wchar_t *src, SIZE_T n) {
422  ENSURE_MSAN_INITED();
423  wchar_t *res = REAL(wmemcpy)(dest, src, n);
424  __msan_copy_poison(dest, src, n * sizeof(wchar_t));
425  return res;
426}
427
428INTERCEPTOR(wchar_t *, wmemset, wchar_t *s, wchar_t c, SIZE_T n) {
429  CHECK(MEM_IS_APP(s));
430  ENSURE_MSAN_INITED();
431  wchar_t *res = (wchar_t *)fast_memset(s, c, n * sizeof(wchar_t));
432  __msan_unpoison(s, n * sizeof(wchar_t));
433  return res;
434}
435
436INTERCEPTOR(wchar_t *, wmemmove, wchar_t *dest, const wchar_t *src, SIZE_T n) {
437  ENSURE_MSAN_INITED();
438  wchar_t *res = REAL(wmemmove)(dest, src, n);
439  __msan_move_poison(dest, src, n * sizeof(wchar_t));
440  return res;
441}
442
443INTERCEPTOR(int, wcscmp, const wchar_t *s1, const wchar_t *s2) {
444  ENSURE_MSAN_INITED();
445  int res = REAL(wcscmp)(s1, s2);
446  return res;
447}
448
449INTERCEPTOR(double, wcstod, const wchar_t *nptr, wchar_t **endptr) {
450  ENSURE_MSAN_INITED();
451  double res = REAL(wcstod)(nptr, endptr);
452  __msan_unpoison(endptr, sizeof(*endptr));
453  return res;
454}
455
456// #define UNSUPPORTED(name) \
457//   INTERCEPTOR(void, name, void) {                     \
458//     Printf("MSAN: Unsupported %s\n", __FUNCTION__);   \
459//     Die();                                            \
460//   }
461
462// FIXME: intercept the following functions:
463// Note, they only matter when running without a dynamic tool.
464// UNSUPPORTED(wcscoll_l)
465// UNSUPPORTED(wcsnrtombs)
466// UNSUPPORTED(wcstol)
467// UNSUPPORTED(wcstoll)
468// UNSUPPORTED(wcstold)
469// UNSUPPORTED(wcstoul)
470// UNSUPPORTED(wcstoull)
471// UNSUPPORTED(wcsxfrm_l)
472// UNSUPPORTED(wcsdup)
473// UNSUPPORTED(wcsftime)
474// UNSUPPORTED(wcsstr)
475// UNSUPPORTED(wcsrchr)
476// UNSUPPORTED(wctob)
477
478INTERCEPTOR(int, gettimeofday, void *tv, void *tz) {
479  ENSURE_MSAN_INITED();
480  int res = REAL(gettimeofday)(tv, tz);
481  if (tv)
482    __msan_unpoison(tv, 16);
483  if (tz)
484    __msan_unpoison(tz, 8);
485  return res;
486}
487
488INTERCEPTOR(char *, fcvt, double x, int a, int *b, int *c) {
489  ENSURE_MSAN_INITED();
490  char *res = REAL(fcvt)(x, a, b, c);
491  if (!__msan_has_dynamic_component()) {
492    __msan_unpoison(b, sizeof(*b));
493    __msan_unpoison(c, sizeof(*c));
494  }
495  return res;
496}
497
498INTERCEPTOR(char *, getenv, char *name) {
499  ENSURE_MSAN_INITED();
500  char *res = REAL(getenv)(name);
501  if (!__msan_has_dynamic_component()) {
502    if (res)
503      __msan_unpoison(res, REAL(strlen)(res) + 1);
504  }
505  return res;
506}
507
508INTERCEPTOR(int, __fxstat, int magic, int fd, void *buf) {
509  ENSURE_MSAN_INITED();
510  int res = REAL(__fxstat)(magic, fd, buf);
511  if (!res)
512    __msan_unpoison(buf, __sanitizer::struct_stat_sz);
513  return res;
514}
515
516INTERCEPTOR(int, __fxstat64, int magic, int fd, void *buf) {
517  ENSURE_MSAN_INITED();
518  int res = REAL(__fxstat64)(magic, fd, buf);
519  if (!res)
520    __msan_unpoison(buf, __sanitizer::struct_stat64_sz);
521  return res;
522}
523
524INTERCEPTOR(int, __xstat, int magic, char *path, void *buf) {
525  ENSURE_MSAN_INITED();
526  int res = REAL(__xstat)(magic, path, buf);
527  if (!res)
528    __msan_unpoison(buf, __sanitizer::struct_stat_sz);
529  return res;
530}
531
532INTERCEPTOR(int, __xstat64, int magic, char *path, void *buf) {
533  ENSURE_MSAN_INITED();
534  int res = REAL(__xstat64)(magic, path, buf);
535  if (!res)
536    __msan_unpoison(buf, __sanitizer::struct_stat64_sz);
537  return res;
538}
539
540INTERCEPTOR(int, __lxstat, int magic, char *path, void *buf) {
541  ENSURE_MSAN_INITED();
542  int res = REAL(__lxstat)(magic, path, buf);
543  if (!res)
544    __msan_unpoison(buf, __sanitizer::struct_stat_sz);
545  return res;
546}
547
548INTERCEPTOR(int, __lxstat64, int magic, char *path, void *buf) {
549  ENSURE_MSAN_INITED();
550  int res = REAL(__lxstat64)(magic, path, buf);
551  if (!res)
552    __msan_unpoison(buf, __sanitizer::struct_stat64_sz);
553  return res;
554}
555
556INTERCEPTOR(int, pipe, int pipefd[2]) {
557  if (msan_init_is_running)
558    return REAL(pipe)(pipefd);
559  ENSURE_MSAN_INITED();
560  int res = REAL(pipe)(pipefd);
561  if (!res)
562    __msan_unpoison(pipefd, sizeof(int[2]));
563  return res;
564}
565
566INTERCEPTOR(int, pipe2, int pipefd[2], int flags) {
567  ENSURE_MSAN_INITED();
568  int res = REAL(pipe2)(pipefd, flags);
569  if (!res)
570    __msan_unpoison(pipefd, sizeof(int[2]));
571  return res;
572}
573
574INTERCEPTOR(int, socketpair, int domain, int type, int protocol, int sv[2]) {
575  ENSURE_MSAN_INITED();
576  int res = REAL(socketpair)(domain, type, protocol, sv);
577  if (!res)
578    __msan_unpoison(sv, sizeof(int[2]));
579  return res;
580}
581
582INTERCEPTOR(char *, fgets, char *s, int size, void *stream) {
583  ENSURE_MSAN_INITED();
584  char *res = REAL(fgets)(s, size, stream);
585  if (res)
586    __msan_unpoison(s, REAL(strlen)(s) + 1);
587  return res;
588}
589
590INTERCEPTOR(char *, fgets_unlocked, char *s, int size, void *stream) {
591  ENSURE_MSAN_INITED();
592  char *res = REAL(fgets_unlocked)(s, size, stream);
593  if (res)
594    __msan_unpoison(s, REAL(strlen)(s) + 1);
595  return res;
596}
597
598INTERCEPTOR(char *, getcwd, char *buf, SIZE_T size) {
599  ENSURE_MSAN_INITED();
600  char *res = REAL(getcwd)(buf, size);
601  if (res)
602    __msan_unpoison(res, REAL(strlen)(res) + 1);
603  return res;
604}
605
606INTERCEPTOR(char *, realpath, char *path, char *abspath) {
607  ENSURE_MSAN_INITED();
608  char *res = REAL(realpath)(path, abspath);
609  if (res)
610    __msan_unpoison(abspath, REAL(strlen)(abspath) + 1);
611  return res;
612}
613
614INTERCEPTOR(int, getrlimit, int resource, void *rlim) {
615  if (msan_init_is_running)
616    return REAL(getrlimit)(resource, rlim);
617  ENSURE_MSAN_INITED();
618  int res = REAL(getrlimit)(resource, rlim);
619  if (!res)
620    __msan_unpoison(rlim, __sanitizer::struct_rlimit_sz);
621  return res;
622}
623
624INTERCEPTOR(int, getrlimit64, int resource, void *rlim) {
625  if (msan_init_is_running)
626    return REAL(getrlimit64)(resource, rlim);
627  ENSURE_MSAN_INITED();
628  int res = REAL(getrlimit64)(resource, rlim);
629  if (!res)
630    __msan_unpoison(rlim, __sanitizer::struct_rlimit64_sz);
631  return res;
632}
633
634INTERCEPTOR(int, statfs, const char *s, void *buf) {
635  ENSURE_MSAN_INITED();
636  int res = REAL(statfs)(s, buf);
637  if (!res)
638    __msan_unpoison(buf, __sanitizer::struct_statfs_sz);
639  return res;
640}
641
642INTERCEPTOR(int, fstatfs, int fd, void *buf) {
643  ENSURE_MSAN_INITED();
644  int res = REAL(fstatfs)(fd, buf);
645  if (!res)
646    __msan_unpoison(buf, __sanitizer::struct_statfs_sz);
647  return res;
648}
649
650INTERCEPTOR(int, statfs64, const char *s, void *buf) {
651  ENSURE_MSAN_INITED();
652  int res = REAL(statfs64)(s, buf);
653  if (!res)
654    __msan_unpoison(buf, __sanitizer::struct_statfs64_sz);
655  return res;
656}
657
658INTERCEPTOR(int, fstatfs64, int fd, void *buf) {
659  ENSURE_MSAN_INITED();
660  int res = REAL(fstatfs64)(fd, buf);
661  if (!res)
662    __msan_unpoison(buf, __sanitizer::struct_statfs64_sz);
663  return res;
664}
665
666INTERCEPTOR(int, uname, void *utsname) {
667  ENSURE_MSAN_INITED();
668  int res = REAL(uname)(utsname);
669  if (!res) {
670    __msan_unpoison(utsname, __sanitizer::struct_utsname_sz);
671  }
672  return res;
673}
674
675INTERCEPTOR(int, gethostname, char *name, SIZE_T len) {
676  ENSURE_MSAN_INITED();
677  int res = REAL(gethostname)(name, len);
678  if (!res) {
679    SIZE_T real_len = REAL(strnlen)(name, len);
680    if (real_len < len)
681      ++real_len;
682    __msan_unpoison(name, real_len);
683  }
684  return res;
685}
686
687INTERCEPTOR(int, epoll_wait, int epfd, void *events, int maxevents,
688    int timeout) {
689  ENSURE_MSAN_INITED();
690  int res = REAL(epoll_wait)(epfd, events, maxevents, timeout);
691  if (res > 0) {
692    __msan_unpoison(events, __sanitizer::struct_epoll_event_sz * res);
693  }
694  return res;
695}
696
697INTERCEPTOR(int, epoll_pwait, int epfd, void *events, int maxevents,
698    int timeout, void *sigmask) {
699  ENSURE_MSAN_INITED();
700  int res = REAL(epoll_pwait)(epfd, events, maxevents, timeout, sigmask);
701  if (res > 0) {
702    __msan_unpoison(events, __sanitizer::struct_epoll_event_sz * res);
703  }
704  return res;
705}
706
707INTERCEPTOR(SSIZE_T, recv, int fd, void *buf, SIZE_T len, int flags) {
708  ENSURE_MSAN_INITED();
709  SSIZE_T res = REAL(recv)(fd, buf, len, flags);
710  if (res > 0)
711    __msan_unpoison(buf, res);
712  return res;
713}
714
715INTERCEPTOR(SSIZE_T, recvfrom, int fd, void *buf, SIZE_T len, int flags,
716            void *srcaddr, int *addrlen) {
717  ENSURE_MSAN_INITED();
718  SIZE_T srcaddr_sz;
719  if (srcaddr) srcaddr_sz = *addrlen;
720  SSIZE_T res = REAL(recvfrom)(fd, buf, len, flags, srcaddr, addrlen);
721  if (res > 0) {
722    __msan_unpoison(buf, res);
723    if (srcaddr) {
724      SIZE_T sz = *addrlen;
725      __msan_unpoison(srcaddr, (sz < srcaddr_sz) ? sz : srcaddr_sz);
726    }
727  }
728  return res;
729}
730
731INTERCEPTOR(void *, calloc, SIZE_T nmemb, SIZE_T size) {
732  if (CallocShouldReturnNullDueToOverflow(size, nmemb)) return 0;
733  GET_MALLOC_STACK_TRACE;
734  if (!msan_inited) {
735    // Hack: dlsym calls calloc before REAL(calloc) is retrieved from dlsym.
736    const SIZE_T kCallocPoolSize = 1024;
737    static uptr calloc_memory_for_dlsym[kCallocPoolSize];
738    static SIZE_T allocated;
739    SIZE_T size_in_words = ((nmemb * size) + kWordSize - 1) / kWordSize;
740    void *mem = (void*)&calloc_memory_for_dlsym[allocated];
741    allocated += size_in_words;
742    CHECK(allocated < kCallocPoolSize);
743    return mem;
744  }
745  return MsanReallocate(&stack, 0, nmemb * size, sizeof(u64), true);
746}
747
748INTERCEPTOR(void *, realloc, void *ptr, SIZE_T size) {
749  GET_MALLOC_STACK_TRACE;
750  return MsanReallocate(&stack, ptr, size, sizeof(u64), false);
751}
752
753INTERCEPTOR(void *, malloc, SIZE_T size) {
754  GET_MALLOC_STACK_TRACE;
755  return MsanReallocate(&stack, 0, size, sizeof(u64), false);
756}
757
758void __msan_allocated_memory(const void* data, uptr size) {
759  GET_MALLOC_STACK_TRACE;
760  if (flags()->poison_in_malloc)
761    __msan_poison(data, size);
762  if (__msan_get_track_origins()) {
763    u32 stack_id = StackDepotPut(stack.trace, stack.size);
764    CHECK(stack_id);
765    CHECK_EQ((stack_id >> 31), 0);  // Higher bit is occupied by stack origins.
766    __msan_set_origin(data, size, stack_id);
767  }
768}
769
770INTERCEPTOR(void *, mmap, void *addr, SIZE_T length, int prot, int flags,
771            int fd, OFF_T offset) {
772  ENSURE_MSAN_INITED();
773  void *res = REAL(mmap)(addr, length, prot, flags, fd, offset);
774  if (res != (void*)-1)
775    __msan_unpoison(res, RoundUpTo(length, GetPageSize()));
776  return res;
777}
778
779INTERCEPTOR(void *, mmap64, void *addr, SIZE_T length, int prot, int flags,
780            int fd, OFF64_T offset) {
781  ENSURE_MSAN_INITED();
782  void *res = REAL(mmap64)(addr, length, prot, flags, fd, offset);
783  if (res != (void*)-1)
784    __msan_unpoison(res, RoundUpTo(length, GetPageSize()));
785  return res;
786}
787
788struct dlinfo {
789  char *dli_fname;
790  void *dli_fbase;
791  char *dli_sname;
792  void *dli_saddr;
793};
794
795INTERCEPTOR(int, dladdr, void *addr, dlinfo *info) {
796  ENSURE_MSAN_INITED();
797  int res = REAL(dladdr)(addr, info);
798  if (res != 0) {
799    __msan_unpoison(info, sizeof(*info));
800    if (info->dli_fname)
801      __msan_unpoison(info->dli_fname, REAL(strlen)(info->dli_fname) + 1);
802    if (info->dli_sname)
803      __msan_unpoison(info->dli_sname, REAL(strlen)(info->dli_sname) + 1);
804  }
805  return res;
806}
807
808// dlopen() ultimately calls mmap() down inside the loader, which generally
809// doesn't participate in dynamic symbol resolution.  Therefore we won't
810// intercept its calls to mmap, and we have to hook it here.  The loader
811// initializes the module before returning, so without the dynamic component, we
812// won't be able to clear the shadow before the initializers.  Fixing this would
813// require putting our own initializer first to clear the shadow.
814INTERCEPTOR(void *, dlopen, const char *filename, int flag) {
815  ENSURE_MSAN_INITED();
816  EnterLoader();
817  link_map *map = (link_map *)REAL(dlopen)(filename, flag);
818  ExitLoader();
819  if (!__msan_has_dynamic_component() && map) {
820    // If msandr didn't clear the shadow before the initializers ran, we do it
821    // ourselves afterwards.
822    UnpoisonMappedDSO(map);
823  }
824  return (void *)map;
825}
826
827typedef int (*dl_iterate_phdr_cb)(__sanitizer_dl_phdr_info *info, SIZE_T size,
828                                  void *data);
829struct dl_iterate_phdr_data {
830  dl_iterate_phdr_cb callback;
831  void *data;
832};
833
834static int msan_dl_iterate_phdr_cb(__sanitizer_dl_phdr_info *info, SIZE_T size,
835                                   void *data) {
836  if (info) {
837    __msan_unpoison(info, size);
838    if (info->dlpi_name)
839      __msan_unpoison(info->dlpi_name, REAL(strlen)(info->dlpi_name) + 1);
840  }
841  dl_iterate_phdr_data *cbdata = (dl_iterate_phdr_data *)data;
842  UnpoisonParam(3);
843  return cbdata->callback(info, size, cbdata->data);
844}
845
846INTERCEPTOR(int, dl_iterate_phdr, dl_iterate_phdr_cb callback, void *data) {
847  ENSURE_MSAN_INITED();
848  EnterLoader();
849  dl_iterate_phdr_data cbdata;
850  cbdata.callback = callback;
851  cbdata.data = data;
852  int res = REAL(dl_iterate_phdr)(msan_dl_iterate_phdr_cb, (void *)&cbdata);
853  ExitLoader();
854  return res;
855}
856
857INTERCEPTOR(int, getrusage, int who, void *usage) {
858  ENSURE_MSAN_INITED();
859  int res = REAL(getrusage)(who, usage);
860  if (res == 0) {
861    __msan_unpoison(usage, __sanitizer::struct_rusage_sz);
862  }
863  return res;
864}
865
866const int kMaxSignals = 1024;
867static uptr sigactions[kMaxSignals];
868static StaticSpinMutex sigactions_mu;
869
870static void SignalHandler(int signo) {
871  typedef void (*signal_cb)(int x);
872  signal_cb cb = (signal_cb)sigactions[signo];
873  cb(signo);
874}
875
876static void SignalAction(int signo, void *si, void *uc) {
877  UnpoisonParam(3);
878  __msan_unpoison(si, __sanitizer::struct_sigaction_sz);
879  __msan_unpoison(uc, __sanitizer::ucontext_t_sz);
880
881  typedef void (*sigaction_cb)(int, void *, void *);
882  sigaction_cb cb = (sigaction_cb)sigactions[signo];
883  cb(signo, si, uc);
884}
885
886INTERCEPTOR(int, sigaction, int signo, const __sanitizer_sigaction *act,
887            __sanitizer_sigaction *oldact) {
888  ENSURE_MSAN_INITED();
889  // FIXME: check that *act is unpoisoned.
890  // That requires intercepting all of sigemptyset, sigfillset, etc.
891  int res;
892  if (flags()->wrap_signals) {
893    SpinMutexLock lock(&sigactions_mu);
894    CHECK_LT(signo, kMaxSignals);
895    uptr old_cb = sigactions[signo];
896    __sanitizer_sigaction new_act;
897    __sanitizer_sigaction *pnew_act = act ? &new_act : 0;
898    if (act) {
899      internal_memcpy(pnew_act, act, __sanitizer::struct_sigaction_sz);
900      uptr cb = __sanitizer::__sanitizer_get_sigaction_sa_sigaction(pnew_act);
901      uptr new_cb =
902          __sanitizer::__sanitizer_get_sigaction_sa_siginfo(pnew_act) ?
903          (uptr)SignalAction : (uptr)SignalHandler;
904      if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) {
905        sigactions[signo] = cb;
906        __sanitizer::__sanitizer_set_sigaction_sa_sigaction(pnew_act, new_cb);
907      }
908    }
909    res = REAL(sigaction)(signo, pnew_act, oldact);
910    if (res == 0 && oldact) {
911      uptr cb = __sanitizer::__sanitizer_get_sigaction_sa_sigaction(oldact);
912      if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) {
913        __sanitizer::__sanitizer_set_sigaction_sa_sigaction(oldact, old_cb);
914      }
915    }
916  } else {
917    res = REAL(sigaction)(signo, act, oldact);
918  }
919
920  if (res == 0 && oldact) {
921    __msan_unpoison(oldact, __sanitizer::struct_sigaction_sz);
922  }
923  return res;
924}
925
926INTERCEPTOR(int, signal, int signo, uptr cb) {
927  ENSURE_MSAN_INITED();
928  if (flags()->wrap_signals) {
929    CHECK_LT(signo, kMaxSignals);
930    SpinMutexLock lock(&sigactions_mu);
931    if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) {
932      sigactions[signo] = cb;
933      cb = (uptr) SignalHandler;
934    }
935    return REAL(signal)(signo, cb);
936  } else {
937    return REAL(signal)(signo, cb);
938  }
939}
940
941extern "C" int pthread_attr_init(void *attr);
942extern "C" int pthread_attr_destroy(void *attr);
943extern "C" int pthread_attr_setstacksize(void *attr, uptr stacksize);
944extern "C" int pthread_attr_getstack(void *attr, uptr *stack, uptr *stacksize);
945
946INTERCEPTOR(int, pthread_create, void *th, void *attr, void *(*callback)(void*),
947            void * param) {
948  ENSURE_MSAN_INITED(); // for GetTlsSize()
949  __sanitizer_pthread_attr_t myattr;
950  if (attr == 0) {
951    pthread_attr_init(&myattr);
952    attr = &myattr;
953  }
954
955  AdjustStackSizeLinux(attr, flags()->verbosity);
956
957  int res = REAL(pthread_create)(th, attr, callback, param);
958  if (attr == &myattr)
959    pthread_attr_destroy(&myattr);
960  if (!res) {
961    __msan_unpoison(th, __sanitizer::pthread_t_sz);
962  }
963  return res;
964}
965
966struct MSanInterceptorContext {
967  bool in_interceptor_scope;
968};
969
970// A version of CHECK_UNPOISED using a saved scope value. Used in common
971// interceptors.
972#define CHECK_UNPOISONED_CTX(ctx, x, n)                        \
973  if (!((MSanInterceptorContext *) ctx)->in_interceptor_scope) \
974    CHECK_UNPOISONED_0(x, n);
975
976#define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \
977  __msan_unpoison(ptr, size)
978#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) \
979  CHECK_UNPOISONED_CTX(ctx, ptr, size);
980#define COMMON_INTERCEPTOR_ENTER(ctx, func, ...)              \
981  if (msan_init_is_running) return REAL(func)(__VA_ARGS__);   \
982  MSanInterceptorContext msan_ctx = {IsInInterceptorScope()}; \
983  ctx = (void *)&msan_ctx;                                    \
984  InterceptorScope interceptor_scope;                         \
985  ENSURE_MSAN_INITED();
986#define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) \
987  do {                                         \
988  } while (false)
989#define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd) \
990  do {                                         \
991  } while (false)
992#define COMMON_INTERCEPTOR_FD_SOCKET_ACCEPT(ctx, fd, newfd) \
993  do {                                                      \
994  } while (false)
995#define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name) \
996  do {                                                \
997  } while (false)  // FIXME
998#include "sanitizer_common/sanitizer_common_interceptors.inc"
999
1000#define COMMON_SYSCALL_PRE_READ_RANGE(p, s) CHECK_UNPOISONED(p, s)
1001#define COMMON_SYSCALL_PRE_WRITE_RANGE(p, s)
1002#define COMMON_SYSCALL_POST_READ_RANGE(p, s)
1003#define COMMON_SYSCALL_POST_WRITE_RANGE(p, s) __msan_unpoison(p, s)
1004#include "sanitizer_common/sanitizer_common_syscalls.inc"
1005
1006// static
1007void *fast_memset(void *ptr, int c, SIZE_T n) {
1008  // hack until we have a really fast internal_memset
1009  if (sizeof(uptr) == 8 &&
1010      (n % 8) == 0 &&
1011      ((uptr)ptr % 8) == 0 &&
1012      (c == 0 || c == -1)) {
1013    // Printf("memset %p %zd %x\n", ptr, n, c);
1014    uptr to_store = c ? -1L : 0L;
1015    uptr *p = (uptr*)ptr;
1016    for (SIZE_T i = 0; i < n / 8; i++)
1017      p[i] = to_store;
1018    return ptr;
1019  }
1020  return internal_memset(ptr, c, n);
1021}
1022
1023// static
1024void *fast_memcpy(void *dst, const void *src, SIZE_T n) {
1025  // Same hack as in fast_memset above.
1026  if (sizeof(uptr) == 8 &&
1027      (n % 8) == 0 &&
1028      ((uptr)dst % 8) == 0 &&
1029      ((uptr)src % 8) == 0) {
1030    uptr *d = (uptr*)dst;
1031    uptr *s = (uptr*)src;
1032    for (SIZE_T i = 0; i < n / 8; i++)
1033      d[i] = s[i];
1034    return dst;
1035  }
1036  return internal_memcpy(dst, src, n);
1037}
1038
1039// These interface functions reside here so that they can use
1040// fast_memset, etc.
1041void __msan_unpoison(const void *a, uptr size) {
1042  if (!MEM_IS_APP(a)) return;
1043  fast_memset((void*)MEM_TO_SHADOW((uptr)a), 0, size);
1044}
1045
1046void __msan_poison(const void *a, uptr size) {
1047  if (!MEM_IS_APP(a)) return;
1048  fast_memset((void*)MEM_TO_SHADOW((uptr)a),
1049              __msan::flags()->poison_heap_with_zeroes ? 0 : -1, size);
1050}
1051
1052void __msan_poison_stack(void *a, uptr size) {
1053  if (!MEM_IS_APP(a)) return;
1054  fast_memset((void*)MEM_TO_SHADOW((uptr)a),
1055              __msan::flags()->poison_stack_with_zeroes ? 0 : -1, size);
1056}
1057
1058void __msan_clear_and_unpoison(void *a, uptr size) {
1059  fast_memset(a, 0, size);
1060  fast_memset((void*)MEM_TO_SHADOW((uptr)a), 0, size);
1061}
1062
1063void __msan_copy_origin(void *dst, const void *src, uptr size) {
1064  if (!__msan_get_track_origins()) return;
1065  if (!MEM_IS_APP(dst) || !MEM_IS_APP(src)) return;
1066  uptr d = MEM_TO_ORIGIN(dst);
1067  uptr s = MEM_TO_ORIGIN(src);
1068  uptr beg = d & ~3UL;  // align down.
1069  uptr end = (d + size + 3) & ~3UL;  // align up.
1070  s = s & ~3UL;  // align down.
1071  fast_memcpy((void*)beg, (void*)s, end - beg);
1072}
1073
1074void __msan_copy_poison(void *dst, const void *src, uptr size) {
1075  if (!MEM_IS_APP(dst)) return;
1076  if (!MEM_IS_APP(src)) return;
1077  fast_memcpy((void*)MEM_TO_SHADOW((uptr)dst),
1078              (void*)MEM_TO_SHADOW((uptr)src), size);
1079  __msan_copy_origin(dst, src, size);
1080}
1081
1082void __msan_move_poison(void *dst, const void *src, uptr size) {
1083  if (!MEM_IS_APP(dst)) return;
1084  if (!MEM_IS_APP(src)) return;
1085  internal_memmove((void*)MEM_TO_SHADOW((uptr)dst),
1086         (void*)MEM_TO_SHADOW((uptr)src), size);
1087  __msan_copy_origin(dst, src, size);
1088}
1089
1090void *__msan_memcpy(void *dest, const void *src, SIZE_T n) {
1091  ENSURE_MSAN_INITED();
1092  void *res = fast_memcpy(dest, src, n);
1093  __msan_copy_poison(dest, src, n);
1094  return res;
1095}
1096
1097void *__msan_memset(void *s, int c, SIZE_T n) {
1098  ENSURE_MSAN_INITED();
1099  void *res = fast_memset(s, c, n);
1100  __msan_unpoison(s, n);
1101  return res;
1102}
1103
1104void *__msan_memmove(void *dest, const void *src, SIZE_T n) {
1105  ENSURE_MSAN_INITED();
1106  void *res = REAL(memmove)(dest, src, n);
1107  __msan_move_poison(dest, src, n);
1108  return res;
1109}
1110
1111namespace __msan {
1112void InitializeInterceptors() {
1113  static int inited = 0;
1114  CHECK_EQ(inited, 0);
1115  SANITIZER_COMMON_INTERCEPTORS_INIT;
1116
1117  INTERCEPT_FUNCTION(mmap);
1118  INTERCEPT_FUNCTION(mmap64);
1119  INTERCEPT_FUNCTION(posix_memalign);
1120  INTERCEPT_FUNCTION(malloc);
1121  INTERCEPT_FUNCTION(calloc);
1122  INTERCEPT_FUNCTION(realloc);
1123  INTERCEPT_FUNCTION(free);
1124  INTERCEPT_FUNCTION(fread);
1125  INTERCEPT_FUNCTION(fread_unlocked);
1126  INTERCEPT_FUNCTION(readlink);
1127  INTERCEPT_FUNCTION(memcpy);
1128  INTERCEPT_FUNCTION(memset);
1129  INTERCEPT_FUNCTION(memmove);
1130  INTERCEPT_FUNCTION(wmemset);
1131  INTERCEPT_FUNCTION(wmemcpy);
1132  INTERCEPT_FUNCTION(wmemmove);
1133  INTERCEPT_FUNCTION(strcpy);  // NOLINT
1134  INTERCEPT_FUNCTION(strdup);
1135  INTERCEPT_FUNCTION(__strdup);
1136  INTERCEPT_FUNCTION(strndup);
1137  INTERCEPT_FUNCTION(__strndup);
1138  INTERCEPT_FUNCTION(strncpy);  // NOLINT
1139  INTERCEPT_FUNCTION(strlen);
1140  INTERCEPT_FUNCTION(strnlen);
1141  INTERCEPT_FUNCTION(gcvt);
1142  INTERCEPT_FUNCTION(strcat);  // NOLINT
1143  INTERCEPT_FUNCTION(strncat);  // NOLINT
1144  INTERCEPT_FUNCTION(strtol);
1145  INTERCEPT_FUNCTION(strtoll);
1146  INTERCEPT_FUNCTION(strtoul);
1147  INTERCEPT_FUNCTION(strtoull);
1148  INTERCEPT_FUNCTION(strtod);
1149  INTERCEPT_FUNCTION(strtof);
1150  INTERCEPT_FUNCTION(strtold);
1151  INTERCEPT_FUNCTION(vasprintf);
1152  INTERCEPT_FUNCTION(asprintf);
1153  INTERCEPT_FUNCTION(vsprintf);
1154  INTERCEPT_FUNCTION(vsnprintf);
1155  INTERCEPT_FUNCTION(vswprintf);
1156  INTERCEPT_FUNCTION(sprintf);  // NOLINT
1157  INTERCEPT_FUNCTION(snprintf);
1158  INTERCEPT_FUNCTION(swprintf);
1159  INTERCEPT_FUNCTION(strftime);
1160  INTERCEPT_FUNCTION(wcstombs);
1161  INTERCEPT_FUNCTION(mbstowcs);
1162  INTERCEPT_FUNCTION(wcslen);
1163  INTERCEPT_FUNCTION(wcschr);
1164  INTERCEPT_FUNCTION(wcscpy);
1165  INTERCEPT_FUNCTION(wcscmp);
1166  INTERCEPT_FUNCTION(wcstod);
1167  INTERCEPT_FUNCTION(getenv);
1168  INTERCEPT_FUNCTION(gettimeofday);
1169  INTERCEPT_FUNCTION(fcvt);
1170  INTERCEPT_FUNCTION(__fxstat);
1171  INTERCEPT_FUNCTION(__xstat);
1172  INTERCEPT_FUNCTION(__lxstat);
1173  INTERCEPT_FUNCTION(__fxstat64);
1174  INTERCEPT_FUNCTION(__xstat64);
1175  INTERCEPT_FUNCTION(__lxstat64);
1176  INTERCEPT_FUNCTION(pipe);
1177  INTERCEPT_FUNCTION(pipe2);
1178  INTERCEPT_FUNCTION(socketpair);
1179  INTERCEPT_FUNCTION(fgets);
1180  INTERCEPT_FUNCTION(fgets_unlocked);
1181  INTERCEPT_FUNCTION(getcwd);
1182  INTERCEPT_FUNCTION(realpath);
1183  INTERCEPT_FUNCTION(getrlimit);
1184  INTERCEPT_FUNCTION(getrlimit64);
1185  INTERCEPT_FUNCTION(statfs);
1186  INTERCEPT_FUNCTION(fstatfs);
1187  INTERCEPT_FUNCTION(statfs64);
1188  INTERCEPT_FUNCTION(fstatfs64);
1189  INTERCEPT_FUNCTION(uname);
1190  INTERCEPT_FUNCTION(gethostname);
1191  INTERCEPT_FUNCTION(epoll_wait);
1192  INTERCEPT_FUNCTION(epoll_pwait);
1193  INTERCEPT_FUNCTION(recv);
1194  INTERCEPT_FUNCTION(recvfrom);
1195  INTERCEPT_FUNCTION(dladdr);
1196  INTERCEPT_FUNCTION(dlopen);
1197  INTERCEPT_FUNCTION(dl_iterate_phdr);
1198  INTERCEPT_FUNCTION(getrusage);
1199  INTERCEPT_FUNCTION(sigaction);
1200  INTERCEPT_FUNCTION(signal);
1201  INTERCEPT_FUNCTION(pthread_create);
1202  inited = 1;
1203}
1204}  // namespace __msan
1205