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 "msan_chained_origin_depot.h" 21 #include "msan_origin.h" 22 #include "msan_thread.h" 23 #include "msan_poisoning.h" 24 #include "sanitizer_common/sanitizer_platform_limits_posix.h" 25 #include "sanitizer_common/sanitizer_allocator.h" 26 #include "sanitizer_common/sanitizer_allocator_interface.h" 27 #include "sanitizer_common/sanitizer_allocator_internal.h" 28 #include "sanitizer_common/sanitizer_atomic.h" 29 #include "sanitizer_common/sanitizer_common.h" 30 #include "sanitizer_common/sanitizer_stackdepot.h" 31 #include "sanitizer_common/sanitizer_libc.h" 32 #include "sanitizer_common/sanitizer_linux.h" 33 #include "sanitizer_common/sanitizer_tls_get_addr.h" 34 35 #include <stdarg.h> 36 // ACHTUNG! No other system header includes in this file. 37 // Ideally, we should get rid of stdarg.h as well. 38 39 using namespace __msan; 40 41 using __sanitizer::memory_order; 42 using __sanitizer::atomic_load; 43 using __sanitizer::atomic_store; 44 using __sanitizer::atomic_uintptr_t; 45 46 #if SANITIZER_FREEBSD 47 #define __errno_location __error 48 #endif 49 50 // True if this is a nested interceptor. 51 static THREADLOCAL int in_interceptor_scope; 52 53 extern "C" int *__errno_location(void); 54 55 struct InterceptorScope { 56 InterceptorScope() { ++in_interceptor_scope; } 57 ~InterceptorScope() { --in_interceptor_scope; } 58 }; 59 60 bool IsInInterceptorScope() { 61 return in_interceptor_scope; 62 } 63 64 #define ENSURE_MSAN_INITED() do { \ 65 CHECK(!msan_init_is_running); \ 66 if (!msan_inited) { \ 67 __msan_init(); \ 68 } \ 69 } while (0) 70 71 // Check that [x, x+n) range is unpoisoned. 72 #define CHECK_UNPOISONED_0(x, n) \ 73 do { \ 74 sptr offset = __msan_test_shadow(x, n); \ 75 if (__msan::IsInSymbolizer()) \ 76 break; \ 77 if (offset >= 0 && __msan::flags()->report_umrs) { \ 78 GET_CALLER_PC_BP_SP; \ 79 (void) sp; \ 80 ReportUMRInsideAddressRange(__func__, x, n, offset); \ 81 __msan::PrintWarningWithOrigin( \ 82 pc, bp, __msan_get_origin((const char *)x + offset)); \ 83 if (__msan::flags()->halt_on_error) { \ 84 Printf("Exiting\n"); \ 85 Die(); \ 86 } \ 87 } \ 88 } while (0) 89 90 // Check that [x, x+n) range is unpoisoned unless we are in a nested 91 // interceptor. 92 #define CHECK_UNPOISONED(x, n) \ 93 do { \ 94 if (!IsInInterceptorScope()) CHECK_UNPOISONED_0(x, n); \ 95 } while (0); 96 97 #define CHECK_UNPOISONED_STRING_OF_LEN(x, len, n) \ 98 CHECK_UNPOISONED((x), \ 99 common_flags()->strict_string_checks ? (len) + 1 : (n) ) 100 101 #define CHECK_UNPOISONED_STRING(x, n) \ 102 CHECK_UNPOISONED_STRING_OF_LEN((x), internal_strlen(x), (n)) 103 104 INTERCEPTOR(SIZE_T, fread, void *ptr, SIZE_T size, SIZE_T nmemb, void *file) { 105 ENSURE_MSAN_INITED(); 106 SIZE_T res = REAL(fread)(ptr, size, nmemb, file); 107 if (res > 0) 108 __msan_unpoison(ptr, res *size); 109 return res; 110 } 111 112 #if !SANITIZER_FREEBSD 113 INTERCEPTOR(SIZE_T, fread_unlocked, void *ptr, SIZE_T size, SIZE_T nmemb, 114 void *file) { 115 ENSURE_MSAN_INITED(); 116 SIZE_T res = REAL(fread_unlocked)(ptr, size, nmemb, file); 117 if (res > 0) 118 __msan_unpoison(ptr, res *size); 119 return res; 120 } 121 #define MSAN_MAYBE_INTERCEPT_FREAD_UNLOCKED INTERCEPT_FUNCTION(fread_unlocked) 122 #else 123 #define MSAN_MAYBE_INTERCEPT_FREAD_UNLOCKED 124 #endif 125 126 INTERCEPTOR(SSIZE_T, readlink, const char *path, char *buf, SIZE_T bufsiz) { 127 ENSURE_MSAN_INITED(); 128 CHECK_UNPOISONED_STRING(path, 0) 129 SSIZE_T res = REAL(readlink)(path, buf, bufsiz); 130 if (res > 0) 131 __msan_unpoison(buf, res); 132 return res; 133 } 134 135 INTERCEPTOR(void *, memcpy, void *dest, const void *src, SIZE_T n) { 136 return __msan_memcpy(dest, src, n); 137 } 138 139 INTERCEPTOR(void *, mempcpy, void *dest, const void *src, SIZE_T n) { 140 return (char *)__msan_memcpy(dest, src, n) + n; 141 } 142 143 INTERCEPTOR(void *, memccpy, void *dest, const void *src, int c, SIZE_T n) { 144 ENSURE_MSAN_INITED(); 145 void *res = REAL(memccpy)(dest, src, c, n); 146 CHECK(!res || (res >= dest && res <= (char *)dest + n)); 147 SIZE_T sz = res ? (char *)res - (char *)dest : n; 148 CHECK_UNPOISONED(src, sz); 149 __msan_unpoison(dest, sz); 150 return res; 151 } 152 153 INTERCEPTOR(void *, memmove, void *dest, const void *src, SIZE_T n) { 154 return __msan_memmove(dest, src, n); 155 } 156 157 INTERCEPTOR(void *, memset, void *s, int c, SIZE_T n) { 158 return __msan_memset(s, c, n); 159 } 160 161 INTERCEPTOR(void *, bcopy, const void *src, void *dest, SIZE_T n) { 162 return __msan_memmove(dest, src, n); 163 } 164 165 INTERCEPTOR(int, posix_memalign, void **memptr, SIZE_T alignment, SIZE_T size) { 166 GET_MALLOC_STACK_TRACE; 167 CHECK_EQ(alignment & (alignment - 1), 0); 168 CHECK_NE(memptr, 0); 169 *memptr = MsanReallocate(&stack, nullptr, size, alignment, false); 170 CHECK_NE(*memptr, 0); 171 __msan_unpoison(memptr, sizeof(*memptr)); 172 return 0; 173 } 174 175 #if !SANITIZER_FREEBSD 176 INTERCEPTOR(void *, memalign, SIZE_T boundary, SIZE_T size) { 177 GET_MALLOC_STACK_TRACE; 178 CHECK_EQ(boundary & (boundary - 1), 0); 179 void *ptr = MsanReallocate(&stack, nullptr, size, boundary, false); 180 return ptr; 181 } 182 #define MSAN_MAYBE_INTERCEPT_MEMALIGN INTERCEPT_FUNCTION(memalign) 183 #else 184 #define MSAN_MAYBE_INTERCEPT_MEMALIGN 185 #endif 186 187 INTERCEPTOR(void *, aligned_alloc, SIZE_T boundary, SIZE_T size) { 188 GET_MALLOC_STACK_TRACE; 189 CHECK_EQ(boundary & (boundary - 1), 0); 190 void *ptr = MsanReallocate(&stack, nullptr, size, boundary, false); 191 return ptr; 192 } 193 194 INTERCEPTOR(void *, __libc_memalign, SIZE_T boundary, SIZE_T size) { 195 GET_MALLOC_STACK_TRACE; 196 CHECK_EQ(boundary & (boundary - 1), 0); 197 void *ptr = MsanReallocate(&stack, nullptr, size, boundary, false); 198 DTLS_on_libc_memalign(ptr, size * boundary); 199 return ptr; 200 } 201 202 INTERCEPTOR(void *, valloc, SIZE_T size) { 203 GET_MALLOC_STACK_TRACE; 204 void *ptr = MsanReallocate(&stack, nullptr, size, GetPageSizeCached(), false); 205 return ptr; 206 } 207 208 #if !SANITIZER_FREEBSD 209 INTERCEPTOR(void *, pvalloc, SIZE_T size) { 210 GET_MALLOC_STACK_TRACE; 211 uptr PageSize = GetPageSizeCached(); 212 size = RoundUpTo(size, PageSize); 213 if (size == 0) { 214 // pvalloc(0) should allocate one page. 215 size = PageSize; 216 } 217 void *ptr = MsanReallocate(&stack, nullptr, size, PageSize, false); 218 return ptr; 219 } 220 #define MSAN_MAYBE_INTERCEPT_PVALLOC INTERCEPT_FUNCTION(pvalloc) 221 #else 222 #define MSAN_MAYBE_INTERCEPT_PVALLOC 223 #endif 224 225 INTERCEPTOR(void, free, void *ptr) { 226 GET_MALLOC_STACK_TRACE; 227 if (!ptr) return; 228 MsanDeallocate(&stack, ptr); 229 } 230 231 #if !SANITIZER_FREEBSD 232 INTERCEPTOR(void, cfree, void *ptr) { 233 GET_MALLOC_STACK_TRACE; 234 if (!ptr) return; 235 MsanDeallocate(&stack, ptr); 236 } 237 #define MSAN_MAYBE_INTERCEPT_CFREE INTERCEPT_FUNCTION(cfree) 238 #else 239 #define MSAN_MAYBE_INTERCEPT_CFREE 240 #endif 241 242 INTERCEPTOR(uptr, malloc_usable_size, void *ptr) { 243 return __sanitizer_get_allocated_size(ptr); 244 } 245 246 #if !SANITIZER_FREEBSD 247 // This function actually returns a struct by value, but we can't unpoison a 248 // temporary! The following is equivalent on all supported platforms but 249 // aarch64 (which uses a different register for sret value). We have a test 250 // to confirm that. 251 INTERCEPTOR(void, mallinfo, __sanitizer_mallinfo *sret) { 252 #ifdef __aarch64__ 253 uptr r8; 254 asm volatile("mov %0,x8" : "=r" (r8)); 255 sret = reinterpret_cast<__sanitizer_mallinfo*>(r8); 256 #endif 257 REAL(memset)(sret, 0, sizeof(*sret)); 258 __msan_unpoison(sret, sizeof(*sret)); 259 } 260 #define MSAN_MAYBE_INTERCEPT_MALLINFO INTERCEPT_FUNCTION(mallinfo) 261 #else 262 #define MSAN_MAYBE_INTERCEPT_MALLINFO 263 #endif 264 265 #if !SANITIZER_FREEBSD 266 INTERCEPTOR(int, mallopt, int cmd, int value) { 267 return -1; 268 } 269 #define MSAN_MAYBE_INTERCEPT_MALLOPT INTERCEPT_FUNCTION(mallopt) 270 #else 271 #define MSAN_MAYBE_INTERCEPT_MALLOPT 272 #endif 273 274 #if !SANITIZER_FREEBSD 275 INTERCEPTOR(void, malloc_stats, void) { 276 // FIXME: implement, but don't call REAL(malloc_stats)! 277 } 278 #define MSAN_MAYBE_INTERCEPT_MALLOC_STATS INTERCEPT_FUNCTION(malloc_stats) 279 #else 280 #define MSAN_MAYBE_INTERCEPT_MALLOC_STATS 281 #endif 282 283 INTERCEPTOR(SIZE_T, strlen, const char *s) { 284 if (msan_init_is_running) 285 return REAL(strlen)(s); 286 ENSURE_MSAN_INITED(); 287 SIZE_T res = REAL(strlen)(s); 288 CHECK_UNPOISONED(s, res + 1); 289 return res; 290 } 291 292 INTERCEPTOR(SIZE_T, strnlen, const char *s, SIZE_T n) { 293 ENSURE_MSAN_INITED(); 294 SIZE_T res = REAL(strnlen)(s, n); 295 SIZE_T scan_size = (res == n) ? res : res + 1; 296 CHECK_UNPOISONED(s, scan_size); 297 return res; 298 } 299 300 INTERCEPTOR(char *, strcpy, char *dest, const char *src) { // NOLINT 301 ENSURE_MSAN_INITED(); 302 GET_STORE_STACK_TRACE; 303 SIZE_T n = REAL(strlen)(src); 304 CHECK_UNPOISONED_STRING(src + n, 0); 305 char *res = REAL(strcpy)(dest, src); // NOLINT 306 CopyShadowAndOrigin(dest, src, n + 1, &stack); 307 return res; 308 } 309 310 INTERCEPTOR(char *, strncpy, char *dest, const char *src, SIZE_T n) { // NOLINT 311 ENSURE_MSAN_INITED(); 312 GET_STORE_STACK_TRACE; 313 SIZE_T copy_size = REAL(strnlen)(src, n); 314 if (copy_size < n) 315 copy_size++; // trailing \0 316 char *res = REAL(strncpy)(dest, src, n); // NOLINT 317 CopyShadowAndOrigin(dest, src, copy_size, &stack); 318 __msan_unpoison(dest + copy_size, n - copy_size); 319 return res; 320 } 321 322 INTERCEPTOR(char *, stpcpy, char *dest, const char *src) { // NOLINT 323 ENSURE_MSAN_INITED(); 324 GET_STORE_STACK_TRACE; 325 SIZE_T n = REAL(strlen)(src); 326 CHECK_UNPOISONED_STRING(src + n, 0); 327 char *res = REAL(stpcpy)(dest, src); // NOLINT 328 CopyShadowAndOrigin(dest, src, n + 1, &stack); 329 return res; 330 } 331 332 INTERCEPTOR(char *, strdup, char *src) { 333 ENSURE_MSAN_INITED(); 334 GET_STORE_STACK_TRACE; 335 // On FreeBSD strdup() leverages strlen(). 336 InterceptorScope interceptor_scope; 337 SIZE_T n = REAL(strlen)(src); 338 CHECK_UNPOISONED_STRING(src + n, 0); 339 char *res = REAL(strdup)(src); 340 CopyShadowAndOrigin(res, src, n + 1, &stack); 341 return res; 342 } 343 344 #if !SANITIZER_FREEBSD 345 INTERCEPTOR(char *, __strdup, char *src) { 346 ENSURE_MSAN_INITED(); 347 GET_STORE_STACK_TRACE; 348 SIZE_T n = REAL(strlen)(src); 349 CHECK_UNPOISONED_STRING(src + n, 0); 350 char *res = REAL(__strdup)(src); 351 CopyShadowAndOrigin(res, src, n + 1, &stack); 352 return res; 353 } 354 #define MSAN_MAYBE_INTERCEPT___STRDUP INTERCEPT_FUNCTION(__strdup) 355 #else 356 #define MSAN_MAYBE_INTERCEPT___STRDUP 357 #endif 358 359 INTERCEPTOR(char *, strndup, char *src, SIZE_T n) { 360 ENSURE_MSAN_INITED(); 361 GET_STORE_STACK_TRACE; 362 // On FreeBSD strndup() leverages strnlen(). 363 InterceptorScope interceptor_scope; 364 SIZE_T copy_size = REAL(strnlen)(src, n); 365 char *res = REAL(strndup)(src, n); 366 CopyShadowAndOrigin(res, src, copy_size, &stack); 367 __msan_unpoison(res + copy_size, 1); // \0 368 return res; 369 } 370 371 #if !SANITIZER_FREEBSD 372 INTERCEPTOR(char *, __strndup, char *src, SIZE_T n) { 373 ENSURE_MSAN_INITED(); 374 GET_STORE_STACK_TRACE; 375 SIZE_T copy_size = REAL(strnlen)(src, n); 376 char *res = REAL(__strndup)(src, n); 377 CopyShadowAndOrigin(res, src, copy_size, &stack); 378 __msan_unpoison(res + copy_size, 1); // \0 379 return res; 380 } 381 #define MSAN_MAYBE_INTERCEPT___STRNDUP INTERCEPT_FUNCTION(__strndup) 382 #else 383 #define MSAN_MAYBE_INTERCEPT___STRNDUP 384 #endif 385 386 INTERCEPTOR(char *, gcvt, double number, SIZE_T ndigit, char *buf) { 387 ENSURE_MSAN_INITED(); 388 char *res = REAL(gcvt)(number, ndigit, buf); 389 SIZE_T n = REAL(strlen)(buf); 390 __msan_unpoison(buf, n + 1); 391 return res; 392 } 393 394 INTERCEPTOR(char *, strcat, char *dest, const char *src) { // NOLINT 395 ENSURE_MSAN_INITED(); 396 GET_STORE_STACK_TRACE; 397 SIZE_T src_size = REAL(strlen)(src); 398 SIZE_T dest_size = REAL(strlen)(dest); 399 CHECK_UNPOISONED_STRING(src + src_size, 0); 400 CHECK_UNPOISONED_STRING(dest + dest_size, 0); 401 char *res = REAL(strcat)(dest, src); // NOLINT 402 CopyShadowAndOrigin(dest + dest_size, src, src_size + 1, &stack); 403 return res; 404 } 405 406 INTERCEPTOR(char *, strncat, char *dest, const char *src, SIZE_T n) { // NOLINT 407 ENSURE_MSAN_INITED(); 408 GET_STORE_STACK_TRACE; 409 SIZE_T dest_size = REAL(strlen)(dest); 410 SIZE_T copy_size = REAL(strnlen)(src, n); 411 CHECK_UNPOISONED_STRING(dest + dest_size, 0); 412 char *res = REAL(strncat)(dest, src, n); // NOLINT 413 CopyShadowAndOrigin(dest + dest_size, src, copy_size, &stack); 414 __msan_unpoison(dest + dest_size + copy_size, 1); // \0 415 return res; 416 } 417 418 // Hack: always pass nptr and endptr as part of __VA_ARGS_ to avoid having to 419 // deal with empty __VA_ARGS__ in the case of INTERCEPTOR_STRTO. 420 #define INTERCEPTOR_STRTO_BODY(ret_type, func, ...) \ 421 ENSURE_MSAN_INITED(); \ 422 ret_type res = REAL(func)(__VA_ARGS__); \ 423 __msan_unpoison(endptr, sizeof(*endptr)); \ 424 return res; 425 426 #define INTERCEPTOR_STRTO(ret_type, func, char_type) \ 427 INTERCEPTOR(ret_type, func, const char_type *nptr, char_type **endptr) { \ 428 INTERCEPTOR_STRTO_BODY(ret_type, func, nptr, endptr); \ 429 } 430 431 #define INTERCEPTOR_STRTO_BASE(ret_type, func, char_type) \ 432 INTERCEPTOR(ret_type, func, const char_type *nptr, char_type **endptr, \ 433 int base) { \ 434 INTERCEPTOR_STRTO_BODY(ret_type, func, nptr, endptr, base); \ 435 } 436 437 #define INTERCEPTOR_STRTO_LOC(ret_type, func, char_type) \ 438 INTERCEPTOR(ret_type, func, const char_type *nptr, char_type **endptr, \ 439 void *loc) { \ 440 INTERCEPTOR_STRTO_BODY(ret_type, func, nptr, endptr, loc); \ 441 } 442 443 #define INTERCEPTOR_STRTO_BASE_LOC(ret_type, func, char_type) \ 444 INTERCEPTOR(ret_type, func, const char_type *nptr, char_type **endptr, \ 445 int base, void *loc) { \ 446 INTERCEPTOR_STRTO_BODY(ret_type, func, nptr, endptr, base, loc); \ 447 } 448 449 #define INTERCEPTORS_STRTO(ret_type, func, char_type) \ 450 INTERCEPTOR_STRTO(ret_type, func, char_type) \ 451 INTERCEPTOR_STRTO_LOC(ret_type, func##_l, char_type) \ 452 INTERCEPTOR_STRTO_LOC(ret_type, __##func##_l, char_type) \ 453 INTERCEPTOR_STRTO_LOC(ret_type, __##func##_internal, char_type) 454 455 #define INTERCEPTORS_STRTO_BASE(ret_type, func, char_type) \ 456 INTERCEPTOR_STRTO_BASE(ret_type, func, char_type) \ 457 INTERCEPTOR_STRTO_BASE_LOC(ret_type, func##_l, char_type) \ 458 INTERCEPTOR_STRTO_BASE_LOC(ret_type, __##func##_l, char_type) \ 459 INTERCEPTOR_STRTO_BASE_LOC(ret_type, __##func##_internal, char_type) 460 461 INTERCEPTORS_STRTO(double, strtod, char) // NOLINT 462 INTERCEPTORS_STRTO(float, strtof, char) // NOLINT 463 INTERCEPTORS_STRTO(long double, strtold, char) // NOLINT 464 INTERCEPTORS_STRTO_BASE(long, strtol, char) // NOLINT 465 INTERCEPTORS_STRTO_BASE(long long, strtoll, char) // NOLINT 466 INTERCEPTORS_STRTO_BASE(unsigned long, strtoul, char) // NOLINT 467 INTERCEPTORS_STRTO_BASE(unsigned long long, strtoull, char) // NOLINT 468 469 INTERCEPTORS_STRTO(double, wcstod, wchar_t) // NOLINT 470 INTERCEPTORS_STRTO(float, wcstof, wchar_t) // NOLINT 471 INTERCEPTORS_STRTO(long double, wcstold, wchar_t) // NOLINT 472 INTERCEPTORS_STRTO_BASE(long, wcstol, wchar_t) // NOLINT 473 INTERCEPTORS_STRTO_BASE(long long, wcstoll, wchar_t) // NOLINT 474 INTERCEPTORS_STRTO_BASE(unsigned long, wcstoul, wchar_t) // NOLINT 475 INTERCEPTORS_STRTO_BASE(unsigned long long, wcstoull, wchar_t) // NOLINT 476 477 #define INTERCEPT_STRTO(func) \ 478 INTERCEPT_FUNCTION(func); \ 479 INTERCEPT_FUNCTION(func##_l); \ 480 INTERCEPT_FUNCTION(__##func##_l); \ 481 INTERCEPT_FUNCTION(__##func##_internal); 482 483 484 // FIXME: support *wprintf in common format interceptors. 485 INTERCEPTOR(int, vswprintf, void *str, uptr size, void *format, va_list ap) { 486 ENSURE_MSAN_INITED(); 487 int res = REAL(vswprintf)(str, size, format, ap); 488 if (res >= 0) { 489 __msan_unpoison(str, 4 * (res + 1)); 490 } 491 return res; 492 } 493 494 INTERCEPTOR(int, swprintf, void *str, uptr size, void *format, ...) { 495 ENSURE_MSAN_INITED(); 496 va_list ap; 497 va_start(ap, format); 498 int res = vswprintf(str, size, format, ap); 499 va_end(ap); 500 return res; 501 } 502 503 INTERCEPTOR(SIZE_T, strxfrm, char *dest, const char *src, SIZE_T n) { 504 ENSURE_MSAN_INITED(); 505 CHECK_UNPOISONED(src, REAL(strlen)(src) + 1); 506 SIZE_T res = REAL(strxfrm)(dest, src, n); 507 if (res < n) __msan_unpoison(dest, res + 1); 508 return res; 509 } 510 511 INTERCEPTOR(SIZE_T, strxfrm_l, char *dest, const char *src, SIZE_T n, 512 void *loc) { 513 ENSURE_MSAN_INITED(); 514 CHECK_UNPOISONED(src, REAL(strlen)(src) + 1); 515 SIZE_T res = REAL(strxfrm_l)(dest, src, n, loc); 516 if (res < n) __msan_unpoison(dest, res + 1); 517 return res; 518 } 519 520 #define INTERCEPTOR_STRFTIME_BODY(char_type, ret_type, func, s, ...) \ 521 ENSURE_MSAN_INITED(); \ 522 ret_type res = REAL(func)(s, __VA_ARGS__); \ 523 if (s) __msan_unpoison(s, sizeof(char_type) * (res + 1)); \ 524 return res; 525 526 INTERCEPTOR(SIZE_T, strftime, char *s, SIZE_T max, const char *format, 527 __sanitizer_tm *tm) { 528 INTERCEPTOR_STRFTIME_BODY(char, SIZE_T, strftime, s, max, format, tm); 529 } 530 531 INTERCEPTOR(SIZE_T, strftime_l, char *s, SIZE_T max, const char *format, 532 __sanitizer_tm *tm, void *loc) { 533 INTERCEPTOR_STRFTIME_BODY(char, SIZE_T, strftime_l, s, max, format, tm, loc); 534 } 535 536 #if !SANITIZER_FREEBSD 537 INTERCEPTOR(SIZE_T, __strftime_l, char *s, SIZE_T max, const char *format, 538 __sanitizer_tm *tm, void *loc) { 539 INTERCEPTOR_STRFTIME_BODY(char, SIZE_T, __strftime_l, s, max, format, tm, 540 loc); 541 } 542 #define MSAN_MAYBE_INTERCEPT___STRFTIME_L INTERCEPT_FUNCTION(__strftime_l) 543 #else 544 #define MSAN_MAYBE_INTERCEPT___STRFTIME_L 545 #endif 546 547 INTERCEPTOR(SIZE_T, wcsftime, wchar_t *s, SIZE_T max, const wchar_t *format, 548 __sanitizer_tm *tm) { 549 INTERCEPTOR_STRFTIME_BODY(wchar_t, SIZE_T, wcsftime, s, max, format, tm); 550 } 551 552 INTERCEPTOR(SIZE_T, wcsftime_l, wchar_t *s, SIZE_T max, const wchar_t *format, 553 __sanitizer_tm *tm, void *loc) { 554 INTERCEPTOR_STRFTIME_BODY(wchar_t, SIZE_T, wcsftime_l, s, max, format, tm, 555 loc); 556 } 557 558 #if !SANITIZER_FREEBSD 559 INTERCEPTOR(SIZE_T, __wcsftime_l, wchar_t *s, SIZE_T max, const wchar_t *format, 560 __sanitizer_tm *tm, void *loc) { 561 INTERCEPTOR_STRFTIME_BODY(wchar_t, SIZE_T, __wcsftime_l, s, max, format, tm, 562 loc); 563 } 564 #define MSAN_MAYBE_INTERCEPT___WCSFTIME_L INTERCEPT_FUNCTION(__wcsftime_l) 565 #else 566 #define MSAN_MAYBE_INTERCEPT___WCSFTIME_L 567 #endif 568 569 INTERCEPTOR(int, mbtowc, wchar_t *dest, const char *src, SIZE_T n) { 570 ENSURE_MSAN_INITED(); 571 int res = REAL(mbtowc)(dest, src, n); 572 if (res != -1 && dest) __msan_unpoison(dest, sizeof(wchar_t)); 573 return res; 574 } 575 576 INTERCEPTOR(int, mbrtowc, wchar_t *dest, const char *src, SIZE_T n, void *ps) { 577 ENSURE_MSAN_INITED(); 578 SIZE_T res = REAL(mbrtowc)(dest, src, n, ps); 579 if (res != (SIZE_T)-1 && dest) __msan_unpoison(dest, sizeof(wchar_t)); 580 return res; 581 } 582 583 INTERCEPTOR(SIZE_T, wcslen, const wchar_t *s) { 584 ENSURE_MSAN_INITED(); 585 SIZE_T res = REAL(wcslen)(s); 586 CHECK_UNPOISONED(s, sizeof(wchar_t) * (res + 1)); 587 return res; 588 } 589 590 // wchar_t *wcschr(const wchar_t *wcs, wchar_t wc); 591 INTERCEPTOR(wchar_t *, wcschr, void *s, wchar_t wc, void *ps) { 592 ENSURE_MSAN_INITED(); 593 wchar_t *res = REAL(wcschr)(s, wc, ps); 594 return res; 595 } 596 597 // wchar_t *wcscpy(wchar_t *dest, const wchar_t *src); 598 INTERCEPTOR(wchar_t *, wcscpy, wchar_t *dest, const wchar_t *src) { 599 ENSURE_MSAN_INITED(); 600 GET_STORE_STACK_TRACE; 601 wchar_t *res = REAL(wcscpy)(dest, src); 602 CopyShadowAndOrigin(dest, src, sizeof(wchar_t) * (REAL(wcslen)(src) + 1), 603 &stack); 604 return res; 605 } 606 607 // wchar_t *wmemcpy(wchar_t *dest, const wchar_t *src, SIZE_T n); 608 INTERCEPTOR(wchar_t *, wmemcpy, wchar_t *dest, const wchar_t *src, SIZE_T n) { 609 ENSURE_MSAN_INITED(); 610 GET_STORE_STACK_TRACE; 611 wchar_t *res = REAL(wmemcpy)(dest, src, n); 612 CopyShadowAndOrigin(dest, src, n * sizeof(wchar_t), &stack); 613 return res; 614 } 615 616 INTERCEPTOR(wchar_t *, wmempcpy, wchar_t *dest, const wchar_t *src, SIZE_T n) { 617 ENSURE_MSAN_INITED(); 618 GET_STORE_STACK_TRACE; 619 wchar_t *res = REAL(wmempcpy)(dest, src, n); 620 CopyShadowAndOrigin(dest, src, n * sizeof(wchar_t), &stack); 621 return res; 622 } 623 624 INTERCEPTOR(wchar_t *, wmemset, wchar_t *s, wchar_t c, SIZE_T n) { 625 CHECK(MEM_IS_APP(s)); 626 ENSURE_MSAN_INITED(); 627 wchar_t *res = REAL(wmemset)(s, c, n); 628 __msan_unpoison(s, n * sizeof(wchar_t)); 629 return res; 630 } 631 632 INTERCEPTOR(wchar_t *, wmemmove, wchar_t *dest, const wchar_t *src, SIZE_T n) { 633 ENSURE_MSAN_INITED(); 634 GET_STORE_STACK_TRACE; 635 wchar_t *res = REAL(wmemmove)(dest, src, n); 636 MoveShadowAndOrigin(dest, src, n * sizeof(wchar_t), &stack); 637 return res; 638 } 639 640 INTERCEPTOR(int, wcscmp, const wchar_t *s1, const wchar_t *s2) { 641 ENSURE_MSAN_INITED(); 642 int res = REAL(wcscmp)(s1, s2); 643 return res; 644 } 645 646 INTERCEPTOR(int, gettimeofday, void *tv, void *tz) { 647 ENSURE_MSAN_INITED(); 648 int res = REAL(gettimeofday)(tv, tz); 649 if (tv) 650 __msan_unpoison(tv, 16); 651 if (tz) 652 __msan_unpoison(tz, 8); 653 return res; 654 } 655 656 INTERCEPTOR(char *, fcvt, double x, int a, int *b, int *c) { 657 ENSURE_MSAN_INITED(); 658 char *res = REAL(fcvt)(x, a, b, c); 659 __msan_unpoison(b, sizeof(*b)); 660 __msan_unpoison(c, sizeof(*c)); 661 if (res) __msan_unpoison(res, REAL(strlen)(res) + 1); 662 return res; 663 } 664 665 INTERCEPTOR(char *, getenv, char *name) { 666 if (msan_init_is_running) 667 return REAL(getenv)(name); 668 ENSURE_MSAN_INITED(); 669 char *res = REAL(getenv)(name); 670 if (res) __msan_unpoison(res, REAL(strlen)(res) + 1); 671 return res; 672 } 673 674 extern char **environ; 675 676 static void UnpoisonEnviron() { 677 char **envp = environ; 678 for (; *envp; ++envp) { 679 __msan_unpoison(envp, sizeof(*envp)); 680 __msan_unpoison(*envp, REAL(strlen)(*envp) + 1); 681 } 682 // Trailing NULL pointer. 683 __msan_unpoison(envp, sizeof(*envp)); 684 } 685 686 INTERCEPTOR(int, setenv, const char *name, const char *value, int overwrite) { 687 ENSURE_MSAN_INITED(); 688 CHECK_UNPOISONED_STRING(name, 0) 689 int res = REAL(setenv)(name, value, overwrite); 690 if (!res) UnpoisonEnviron(); 691 return res; 692 } 693 694 INTERCEPTOR(int, putenv, char *string) { 695 ENSURE_MSAN_INITED(); 696 int res = REAL(putenv)(string); 697 if (!res) UnpoisonEnviron(); 698 return res; 699 } 700 701 #if !SANITIZER_FREEBSD 702 INTERCEPTOR(int, __fxstat, int magic, int fd, void *buf) { 703 ENSURE_MSAN_INITED(); 704 int res = REAL(__fxstat)(magic, fd, buf); 705 if (!res) 706 __msan_unpoison(buf, __sanitizer::struct_stat_sz); 707 return res; 708 } 709 #define MSAN_MAYBE_INTERCEPT___FXSTAT INTERCEPT_FUNCTION(__fxstat) 710 #else 711 #define MSAN_MAYBE_INTERCEPT___FXSTAT 712 #endif 713 714 #if !SANITIZER_FREEBSD 715 INTERCEPTOR(int, __fxstat64, int magic, int fd, void *buf) { 716 ENSURE_MSAN_INITED(); 717 int res = REAL(__fxstat64)(magic, fd, buf); 718 if (!res) 719 __msan_unpoison(buf, __sanitizer::struct_stat64_sz); 720 return res; 721 } 722 #define MSAN_MAYBE_INTERCEPT___FXSTAT64 INTERCEPT_FUNCTION(__fxstat64) 723 #else 724 #define MSAN_MAYBE_INTERCEPT___FXSTAT64 725 #endif 726 727 #if SANITIZER_FREEBSD 728 INTERCEPTOR(int, fstatat, int fd, char *pathname, void *buf, int flags) { 729 ENSURE_MSAN_INITED(); 730 int res = REAL(fstatat)(fd, pathname, buf, flags); 731 if (!res) __msan_unpoison(buf, __sanitizer::struct_stat_sz); 732 return res; 733 } 734 # define MSAN_INTERCEPT_FSTATAT INTERCEPT_FUNCTION(fstatat) 735 #else 736 INTERCEPTOR(int, __fxstatat, int magic, int fd, char *pathname, void *buf, 737 int flags) { 738 ENSURE_MSAN_INITED(); 739 int res = REAL(__fxstatat)(magic, fd, pathname, buf, flags); 740 if (!res) __msan_unpoison(buf, __sanitizer::struct_stat_sz); 741 return res; 742 } 743 # define MSAN_INTERCEPT_FSTATAT INTERCEPT_FUNCTION(__fxstatat) 744 #endif 745 746 #if !SANITIZER_FREEBSD 747 INTERCEPTOR(int, __fxstatat64, int magic, int fd, char *pathname, void *buf, 748 int flags) { 749 ENSURE_MSAN_INITED(); 750 int res = REAL(__fxstatat64)(magic, fd, pathname, buf, flags); 751 if (!res) __msan_unpoison(buf, __sanitizer::struct_stat64_sz); 752 return res; 753 } 754 #define MSAN_MAYBE_INTERCEPT___FXSTATAT64 INTERCEPT_FUNCTION(__fxstatat64) 755 #else 756 #define MSAN_MAYBE_INTERCEPT___FXSTATAT64 757 #endif 758 759 #if SANITIZER_FREEBSD 760 INTERCEPTOR(int, stat, char *path, void *buf) { 761 ENSURE_MSAN_INITED(); 762 int res = REAL(stat)(path, buf); 763 if (!res) 764 __msan_unpoison(buf, __sanitizer::struct_stat_sz); 765 return res; 766 } 767 # define MSAN_INTERCEPT_STAT INTERCEPT_FUNCTION(stat) 768 #else 769 INTERCEPTOR(int, __xstat, int magic, char *path, void *buf) { 770 ENSURE_MSAN_INITED(); 771 int res = REAL(__xstat)(magic, path, buf); 772 if (!res) 773 __msan_unpoison(buf, __sanitizer::struct_stat_sz); 774 return res; 775 } 776 # define MSAN_INTERCEPT_STAT INTERCEPT_FUNCTION(__xstat) 777 #endif 778 779 #if !SANITIZER_FREEBSD 780 INTERCEPTOR(int, __xstat64, int magic, char *path, void *buf) { 781 ENSURE_MSAN_INITED(); 782 int res = REAL(__xstat64)(magic, path, buf); 783 if (!res) 784 __msan_unpoison(buf, __sanitizer::struct_stat64_sz); 785 return res; 786 } 787 #define MSAN_MAYBE_INTERCEPT___XSTAT64 INTERCEPT_FUNCTION(__xstat64) 788 #else 789 #define MSAN_MAYBE_INTERCEPT___XSTAT64 790 #endif 791 792 #if !SANITIZER_FREEBSD 793 INTERCEPTOR(int, __lxstat, int magic, char *path, void *buf) { 794 ENSURE_MSAN_INITED(); 795 int res = REAL(__lxstat)(magic, path, buf); 796 if (!res) 797 __msan_unpoison(buf, __sanitizer::struct_stat_sz); 798 return res; 799 } 800 #define MSAN_MAYBE_INTERCEPT___LXSTAT INTERCEPT_FUNCTION(__lxstat) 801 #else 802 #define MSAN_MAYBE_INTERCEPT___LXSTAT 803 #endif 804 805 #if !SANITIZER_FREEBSD 806 INTERCEPTOR(int, __lxstat64, int magic, char *path, void *buf) { 807 ENSURE_MSAN_INITED(); 808 int res = REAL(__lxstat64)(magic, path, buf); 809 if (!res) 810 __msan_unpoison(buf, __sanitizer::struct_stat64_sz); 811 return res; 812 } 813 #define MSAN_MAYBE_INTERCEPT___LXSTAT64 INTERCEPT_FUNCTION(__lxstat64) 814 #else 815 #define MSAN_MAYBE_INTERCEPT___LXSTAT64 816 #endif 817 818 INTERCEPTOR(int, pipe, int pipefd[2]) { 819 if (msan_init_is_running) 820 return REAL(pipe)(pipefd); 821 ENSURE_MSAN_INITED(); 822 int res = REAL(pipe)(pipefd); 823 if (!res) 824 __msan_unpoison(pipefd, sizeof(int[2])); 825 return res; 826 } 827 828 INTERCEPTOR(int, pipe2, int pipefd[2], int flags) { 829 ENSURE_MSAN_INITED(); 830 int res = REAL(pipe2)(pipefd, flags); 831 if (!res) 832 __msan_unpoison(pipefd, sizeof(int[2])); 833 return res; 834 } 835 836 INTERCEPTOR(int, socketpair, int domain, int type, int protocol, int sv[2]) { 837 ENSURE_MSAN_INITED(); 838 int res = REAL(socketpair)(domain, type, protocol, sv); 839 if (!res) 840 __msan_unpoison(sv, sizeof(int[2])); 841 return res; 842 } 843 844 INTERCEPTOR(char *, fgets, char *s, int size, void *stream) { 845 ENSURE_MSAN_INITED(); 846 char *res = REAL(fgets)(s, size, stream); 847 if (res) 848 __msan_unpoison(s, REAL(strlen)(s) + 1); 849 return res; 850 } 851 852 #if !SANITIZER_FREEBSD 853 INTERCEPTOR(char *, fgets_unlocked, char *s, int size, void *stream) { 854 ENSURE_MSAN_INITED(); 855 char *res = REAL(fgets_unlocked)(s, size, stream); 856 if (res) 857 __msan_unpoison(s, REAL(strlen)(s) + 1); 858 return res; 859 } 860 #define MSAN_MAYBE_INTERCEPT_FGETS_UNLOCKED INTERCEPT_FUNCTION(fgets_unlocked) 861 #else 862 #define MSAN_MAYBE_INTERCEPT_FGETS_UNLOCKED 863 #endif 864 865 INTERCEPTOR(int, getrlimit, int resource, void *rlim) { 866 if (msan_init_is_running) 867 return REAL(getrlimit)(resource, rlim); 868 ENSURE_MSAN_INITED(); 869 int res = REAL(getrlimit)(resource, rlim); 870 if (!res) 871 __msan_unpoison(rlim, __sanitizer::struct_rlimit_sz); 872 return res; 873 } 874 875 #if !SANITIZER_FREEBSD 876 INTERCEPTOR(int, getrlimit64, int resource, void *rlim) { 877 if (msan_init_is_running) 878 return REAL(getrlimit64)(resource, rlim); 879 ENSURE_MSAN_INITED(); 880 int res = REAL(getrlimit64)(resource, rlim); 881 if (!res) 882 __msan_unpoison(rlim, __sanitizer::struct_rlimit64_sz); 883 return res; 884 } 885 #define MSAN_MAYBE_INTERCEPT_GETRLIMIT64 INTERCEPT_FUNCTION(getrlimit64) 886 #else 887 #define MSAN_MAYBE_INTERCEPT_GETRLIMIT64 888 #endif 889 890 #if SANITIZER_FREEBSD 891 // FreeBSD's <sys/utsname.h> define uname() as 892 // static __inline int uname(struct utsname *name) { 893 // return __xuname(SYS_NMLN, (void*)name); 894 // } 895 INTERCEPTOR(int, __xuname, int size, void *utsname) { 896 ENSURE_MSAN_INITED(); 897 int res = REAL(__xuname)(size, utsname); 898 if (!res) 899 __msan_unpoison(utsname, __sanitizer::struct_utsname_sz); 900 return res; 901 } 902 #define MSAN_INTERCEPT_UNAME INTERCEPT_FUNCTION(__xuname) 903 #else 904 INTERCEPTOR(int, uname, struct utsname *utsname) { 905 ENSURE_MSAN_INITED(); 906 int res = REAL(uname)(utsname); 907 if (!res) 908 __msan_unpoison(utsname, __sanitizer::struct_utsname_sz); 909 return res; 910 } 911 #define MSAN_INTERCEPT_UNAME INTERCEPT_FUNCTION(uname) 912 #endif 913 914 INTERCEPTOR(int, gethostname, char *name, SIZE_T len) { 915 ENSURE_MSAN_INITED(); 916 int res = REAL(gethostname)(name, len); 917 if (!res) { 918 SIZE_T real_len = REAL(strnlen)(name, len); 919 if (real_len < len) 920 ++real_len; 921 __msan_unpoison(name, real_len); 922 } 923 return res; 924 } 925 926 #if !SANITIZER_FREEBSD 927 INTERCEPTOR(int, epoll_wait, int epfd, void *events, int maxevents, 928 int timeout) { 929 ENSURE_MSAN_INITED(); 930 int res = REAL(epoll_wait)(epfd, events, maxevents, timeout); 931 if (res > 0) { 932 __msan_unpoison(events, __sanitizer::struct_epoll_event_sz * res); 933 } 934 return res; 935 } 936 #define MSAN_MAYBE_INTERCEPT_EPOLL_WAIT INTERCEPT_FUNCTION(epoll_wait) 937 #else 938 #define MSAN_MAYBE_INTERCEPT_EPOLL_WAIT 939 #endif 940 941 #if !SANITIZER_FREEBSD 942 INTERCEPTOR(int, epoll_pwait, int epfd, void *events, int maxevents, 943 int timeout, void *sigmask) { 944 ENSURE_MSAN_INITED(); 945 int res = REAL(epoll_pwait)(epfd, events, maxevents, timeout, sigmask); 946 if (res > 0) { 947 __msan_unpoison(events, __sanitizer::struct_epoll_event_sz * res); 948 } 949 return res; 950 } 951 #define MSAN_MAYBE_INTERCEPT_EPOLL_PWAIT INTERCEPT_FUNCTION(epoll_pwait) 952 #else 953 #define MSAN_MAYBE_INTERCEPT_EPOLL_PWAIT 954 #endif 955 956 INTERCEPTOR(SSIZE_T, recv, int fd, void *buf, SIZE_T len, int flags) { 957 ENSURE_MSAN_INITED(); 958 SSIZE_T res = REAL(recv)(fd, buf, len, flags); 959 if (res > 0) 960 __msan_unpoison(buf, res); 961 return res; 962 } 963 964 INTERCEPTOR(SSIZE_T, recvfrom, int fd, void *buf, SIZE_T len, int flags, 965 void *srcaddr, int *addrlen) { 966 ENSURE_MSAN_INITED(); 967 SIZE_T srcaddr_sz; 968 if (srcaddr) srcaddr_sz = *addrlen; 969 SSIZE_T res = REAL(recvfrom)(fd, buf, len, flags, srcaddr, addrlen); 970 if (res > 0) { 971 __msan_unpoison(buf, res); 972 if (srcaddr) { 973 SIZE_T sz = *addrlen; 974 __msan_unpoison(srcaddr, Min(sz, srcaddr_sz)); 975 } 976 } 977 return res; 978 } 979 980 INTERCEPTOR(void *, calloc, SIZE_T nmemb, SIZE_T size) { 981 GET_MALLOC_STACK_TRACE; 982 if (UNLIKELY(!msan_inited)) { 983 // Hack: dlsym calls calloc before REAL(calloc) is retrieved from dlsym. 984 const SIZE_T kCallocPoolSize = 1024; 985 static uptr calloc_memory_for_dlsym[kCallocPoolSize]; 986 static SIZE_T allocated; 987 SIZE_T size_in_words = ((nmemb * size) + kWordSize - 1) / kWordSize; 988 void *mem = (void*)&calloc_memory_for_dlsym[allocated]; 989 allocated += size_in_words; 990 CHECK(allocated < kCallocPoolSize); 991 return mem; 992 } 993 return MsanCalloc(&stack, nmemb, size); 994 } 995 996 INTERCEPTOR(void *, realloc, void *ptr, SIZE_T size) { 997 GET_MALLOC_STACK_TRACE; 998 return MsanReallocate(&stack, ptr, size, sizeof(u64), false); 999 } 1000 1001 INTERCEPTOR(void *, malloc, SIZE_T size) { 1002 GET_MALLOC_STACK_TRACE; 1003 return MsanReallocate(&stack, nullptr, size, sizeof(u64), false); 1004 } 1005 1006 void __msan_allocated_memory(const void *data, uptr size) { 1007 GET_MALLOC_STACK_TRACE; 1008 if (flags()->poison_in_malloc) { 1009 stack.tag = STACK_TRACE_TAG_POISON; 1010 PoisonMemory(data, size, &stack); 1011 } 1012 } 1013 1014 void __msan_copy_shadow(void *dest, const void *src, uptr n) { 1015 GET_STORE_STACK_TRACE; 1016 MoveShadowAndOrigin(dest, src, n, &stack); 1017 } 1018 1019 void __sanitizer_dtor_callback(const void *data, uptr size) { 1020 GET_MALLOC_STACK_TRACE; 1021 if (flags()->poison_in_dtor) { 1022 stack.tag = STACK_TRACE_TAG_POISON; 1023 PoisonMemory(data, size, &stack); 1024 } 1025 } 1026 1027 INTERCEPTOR(void *, mmap, void *addr, SIZE_T length, int prot, int flags, 1028 int fd, OFF_T offset) { 1029 if (msan_init_is_running) 1030 return REAL(mmap)(addr, length, prot, flags, fd, offset); 1031 ENSURE_MSAN_INITED(); 1032 if (addr && !MEM_IS_APP(addr)) { 1033 if (flags & map_fixed) { 1034 *__errno_location() = errno_EINVAL; 1035 return (void *)-1; 1036 } else { 1037 addr = nullptr; 1038 } 1039 } 1040 void *res = REAL(mmap)(addr, length, prot, flags, fd, offset); 1041 if (res != (void*)-1) 1042 __msan_unpoison(res, RoundUpTo(length, GetPageSize())); 1043 return res; 1044 } 1045 1046 #if !SANITIZER_FREEBSD 1047 INTERCEPTOR(void *, mmap64, void *addr, SIZE_T length, int prot, int flags, 1048 int fd, OFF64_T offset) { 1049 ENSURE_MSAN_INITED(); 1050 if (addr && !MEM_IS_APP(addr)) { 1051 if (flags & map_fixed) { 1052 *__errno_location() = errno_EINVAL; 1053 return (void *)-1; 1054 } else { 1055 addr = nullptr; 1056 } 1057 } 1058 void *res = REAL(mmap64)(addr, length, prot, flags, fd, offset); 1059 if (res != (void*)-1) 1060 __msan_unpoison(res, RoundUpTo(length, GetPageSize())); 1061 return res; 1062 } 1063 #define MSAN_MAYBE_INTERCEPT_MMAP64 INTERCEPT_FUNCTION(mmap64) 1064 #else 1065 #define MSAN_MAYBE_INTERCEPT_MMAP64 1066 #endif 1067 1068 struct dlinfo { 1069 char *dli_fname; 1070 void *dli_fbase; 1071 char *dli_sname; 1072 void *dli_saddr; 1073 }; 1074 1075 INTERCEPTOR(int, dladdr, void *addr, dlinfo *info) { 1076 ENSURE_MSAN_INITED(); 1077 int res = REAL(dladdr)(addr, info); 1078 if (res != 0) { 1079 __msan_unpoison(info, sizeof(*info)); 1080 if (info->dli_fname) 1081 __msan_unpoison(info->dli_fname, REAL(strlen)(info->dli_fname) + 1); 1082 if (info->dli_sname) 1083 __msan_unpoison(info->dli_sname, REAL(strlen)(info->dli_sname) + 1); 1084 } 1085 return res; 1086 } 1087 1088 INTERCEPTOR(char *, dlerror, int fake) { 1089 ENSURE_MSAN_INITED(); 1090 char *res = REAL(dlerror)(fake); 1091 if (res) __msan_unpoison(res, REAL(strlen)(res) + 1); 1092 return res; 1093 } 1094 1095 typedef int (*dl_iterate_phdr_cb)(__sanitizer_dl_phdr_info *info, SIZE_T size, 1096 void *data); 1097 struct dl_iterate_phdr_data { 1098 dl_iterate_phdr_cb callback; 1099 void *data; 1100 }; 1101 1102 static int msan_dl_iterate_phdr_cb(__sanitizer_dl_phdr_info *info, SIZE_T size, 1103 void *data) { 1104 if (info) { 1105 __msan_unpoison(info, size); 1106 if (info->dlpi_phdr && info->dlpi_phnum) 1107 __msan_unpoison(info->dlpi_phdr, struct_ElfW_Phdr_sz * info->dlpi_phnum); 1108 if (info->dlpi_name) 1109 __msan_unpoison(info->dlpi_name, REAL(strlen)(info->dlpi_name) + 1); 1110 } 1111 dl_iterate_phdr_data *cbdata = (dl_iterate_phdr_data *)data; 1112 UnpoisonParam(3); 1113 return cbdata->callback(info, size, cbdata->data); 1114 } 1115 1116 INTERCEPTOR(int, dl_iterate_phdr, dl_iterate_phdr_cb callback, void *data) { 1117 ENSURE_MSAN_INITED(); 1118 dl_iterate_phdr_data cbdata; 1119 cbdata.callback = callback; 1120 cbdata.data = data; 1121 int res = REAL(dl_iterate_phdr)(msan_dl_iterate_phdr_cb, (void *)&cbdata); 1122 return res; 1123 } 1124 1125 INTERCEPTOR(int, getrusage, int who, void *usage) { 1126 ENSURE_MSAN_INITED(); 1127 int res = REAL(getrusage)(who, usage); 1128 if (res == 0) { 1129 __msan_unpoison(usage, __sanitizer::struct_rusage_sz); 1130 } 1131 return res; 1132 } 1133 1134 class SignalHandlerScope { 1135 public: 1136 SignalHandlerScope() { 1137 if (MsanThread *t = GetCurrentThread()) 1138 t->EnterSignalHandler(); 1139 } 1140 ~SignalHandlerScope() { 1141 if (MsanThread *t = GetCurrentThread()) 1142 t->LeaveSignalHandler(); 1143 } 1144 }; 1145 1146 // sigactions_mu guarantees atomicity of sigaction() and signal() calls. 1147 // Access to sigactions[] is gone with relaxed atomics to avoid data race with 1148 // the signal handler. 1149 const int kMaxSignals = 1024; 1150 static atomic_uintptr_t sigactions[kMaxSignals]; 1151 static StaticSpinMutex sigactions_mu; 1152 1153 static void SignalHandler(int signo) { 1154 SignalHandlerScope signal_handler_scope; 1155 ScopedThreadLocalStateBackup stlsb; 1156 UnpoisonParam(1); 1157 1158 typedef void (*signal_cb)(int x); 1159 signal_cb cb = 1160 (signal_cb)atomic_load(&sigactions[signo], memory_order_relaxed); 1161 cb(signo); 1162 } 1163 1164 static void SignalAction(int signo, void *si, void *uc) { 1165 SignalHandlerScope signal_handler_scope; 1166 ScopedThreadLocalStateBackup stlsb; 1167 UnpoisonParam(3); 1168 __msan_unpoison(si, sizeof(__sanitizer_sigaction)); 1169 __msan_unpoison(uc, __sanitizer::ucontext_t_sz); 1170 1171 typedef void (*sigaction_cb)(int, void *, void *); 1172 sigaction_cb cb = 1173 (sigaction_cb)atomic_load(&sigactions[signo], memory_order_relaxed); 1174 cb(signo, si, uc); 1175 } 1176 1177 INTERCEPTOR(int, sigaction, int signo, const __sanitizer_sigaction *act, 1178 __sanitizer_sigaction *oldact) { 1179 ENSURE_MSAN_INITED(); 1180 // FIXME: check that *act is unpoisoned. 1181 // That requires intercepting all of sigemptyset, sigfillset, etc. 1182 int res; 1183 if (flags()->wrap_signals) { 1184 SpinMutexLock lock(&sigactions_mu); 1185 CHECK_LT(signo, kMaxSignals); 1186 uptr old_cb = atomic_load(&sigactions[signo], memory_order_relaxed); 1187 __sanitizer_sigaction new_act; 1188 __sanitizer_sigaction *pnew_act = act ? &new_act : nullptr; 1189 if (act) { 1190 REAL(memcpy)(pnew_act, act, sizeof(__sanitizer_sigaction)); 1191 uptr cb = (uptr)pnew_act->sigaction; 1192 uptr new_cb = (pnew_act->sa_flags & __sanitizer::sa_siginfo) 1193 ? (uptr)SignalAction 1194 : (uptr)SignalHandler; 1195 if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) { 1196 atomic_store(&sigactions[signo], cb, memory_order_relaxed); 1197 pnew_act->sigaction = (void (*)(int, void *, void *))new_cb; 1198 } 1199 } 1200 res = REAL(sigaction)(signo, pnew_act, oldact); 1201 if (res == 0 && oldact) { 1202 uptr cb = (uptr)oldact->sigaction; 1203 if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) { 1204 oldact->sigaction = (void (*)(int, void *, void *))old_cb; 1205 } 1206 } 1207 } else { 1208 res = REAL(sigaction)(signo, act, oldact); 1209 } 1210 1211 if (res == 0 && oldact) { 1212 __msan_unpoison(oldact, sizeof(__sanitizer_sigaction)); 1213 } 1214 return res; 1215 } 1216 1217 INTERCEPTOR(int, signal, int signo, uptr cb) { 1218 ENSURE_MSAN_INITED(); 1219 if (flags()->wrap_signals) { 1220 CHECK_LT(signo, kMaxSignals); 1221 SpinMutexLock lock(&sigactions_mu); 1222 if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) { 1223 atomic_store(&sigactions[signo], cb, memory_order_relaxed); 1224 cb = (uptr) SignalHandler; 1225 } 1226 return REAL(signal)(signo, cb); 1227 } else { 1228 return REAL(signal)(signo, cb); 1229 } 1230 } 1231 1232 extern "C" int pthread_attr_init(void *attr); 1233 extern "C" int pthread_attr_destroy(void *attr); 1234 1235 static void *MsanThreadStartFunc(void *arg) { 1236 MsanThread *t = (MsanThread *)arg; 1237 SetCurrentThread(t); 1238 return t->ThreadStart(); 1239 } 1240 1241 INTERCEPTOR(int, pthread_create, void *th, void *attr, void *(*callback)(void*), 1242 void * param) { 1243 ENSURE_MSAN_INITED(); // for GetTlsSize() 1244 __sanitizer_pthread_attr_t myattr; 1245 if (!attr) { 1246 pthread_attr_init(&myattr); 1247 attr = &myattr; 1248 } 1249 1250 AdjustStackSize(attr); 1251 1252 MsanThread *t = MsanThread::Create(callback, param); 1253 1254 int res = REAL(pthread_create)(th, attr, MsanThreadStartFunc, t); 1255 1256 if (attr == &myattr) 1257 pthread_attr_destroy(&myattr); 1258 if (!res) { 1259 __msan_unpoison(th, __sanitizer::pthread_t_sz); 1260 } 1261 return res; 1262 } 1263 1264 INTERCEPTOR(int, pthread_key_create, __sanitizer_pthread_key_t *key, 1265 void (*dtor)(void *value)) { 1266 if (msan_init_is_running) return REAL(pthread_key_create)(key, dtor); 1267 ENSURE_MSAN_INITED(); 1268 int res = REAL(pthread_key_create)(key, dtor); 1269 if (!res && key) 1270 __msan_unpoison(key, sizeof(*key)); 1271 return res; 1272 } 1273 1274 INTERCEPTOR(int, pthread_join, void *th, void **retval) { 1275 ENSURE_MSAN_INITED(); 1276 int res = REAL(pthread_join)(th, retval); 1277 if (!res && retval) 1278 __msan_unpoison(retval, sizeof(*retval)); 1279 return res; 1280 } 1281 1282 extern char *tzname[2]; 1283 1284 INTERCEPTOR(void, tzset, int fake) { 1285 ENSURE_MSAN_INITED(); 1286 REAL(tzset)(fake); 1287 if (tzname[0]) 1288 __msan_unpoison(tzname[0], REAL(strlen)(tzname[0]) + 1); 1289 if (tzname[1]) 1290 __msan_unpoison(tzname[1], REAL(strlen)(tzname[1]) + 1); 1291 return; 1292 } 1293 1294 struct MSanAtExitRecord { 1295 void (*func)(void *arg); 1296 void *arg; 1297 }; 1298 1299 void MSanAtExitWrapper(void *arg) { 1300 UnpoisonParam(1); 1301 MSanAtExitRecord *r = (MSanAtExitRecord *)arg; 1302 r->func(r->arg); 1303 InternalFree(r); 1304 } 1305 1306 // Unpoison argument shadow for C++ module destructors. 1307 INTERCEPTOR(int, __cxa_atexit, void (*func)(void *), void *arg, 1308 void *dso_handle) { 1309 if (msan_init_is_running) return REAL(__cxa_atexit)(func, arg, dso_handle); 1310 ENSURE_MSAN_INITED(); 1311 MSanAtExitRecord *r = 1312 (MSanAtExitRecord *)InternalAlloc(sizeof(MSanAtExitRecord)); 1313 r->func = func; 1314 r->arg = arg; 1315 return REAL(__cxa_atexit)(MSanAtExitWrapper, r, dso_handle); 1316 } 1317 1318 DECLARE_REAL(int, shmctl, int shmid, int cmd, void *buf) 1319 1320 INTERCEPTOR(void *, shmat, int shmid, const void *shmaddr, int shmflg) { 1321 ENSURE_MSAN_INITED(); 1322 void *p = REAL(shmat)(shmid, shmaddr, shmflg); 1323 if (p != (void *)-1) { 1324 __sanitizer_shmid_ds ds; 1325 int res = REAL(shmctl)(shmid, shmctl_ipc_stat, &ds); 1326 if (!res) { 1327 __msan_unpoison(p, ds.shm_segsz); 1328 } 1329 } 1330 return p; 1331 } 1332 1333 static void BeforeFork() { 1334 StackDepotLockAll(); 1335 ChainedOriginDepotLockAll(); 1336 } 1337 1338 static void AfterFork() { 1339 ChainedOriginDepotUnlockAll(); 1340 StackDepotUnlockAll(); 1341 } 1342 1343 INTERCEPTOR(int, fork, void) { 1344 ENSURE_MSAN_INITED(); 1345 BeforeFork(); 1346 int pid = REAL(fork)(); 1347 AfterFork(); 1348 return pid; 1349 } 1350 1351 INTERCEPTOR(int, openpty, int *amaster, int *aslave, char *name, 1352 const void *termp, const void *winp) { 1353 ENSURE_MSAN_INITED(); 1354 InterceptorScope interceptor_scope; 1355 int res = REAL(openpty)(amaster, aslave, name, termp, winp); 1356 if (!res) { 1357 __msan_unpoison(amaster, sizeof(*amaster)); 1358 __msan_unpoison(aslave, sizeof(*aslave)); 1359 } 1360 return res; 1361 } 1362 1363 INTERCEPTOR(int, forkpty, int *amaster, char *name, const void *termp, 1364 const void *winp) { 1365 ENSURE_MSAN_INITED(); 1366 InterceptorScope interceptor_scope; 1367 int res = REAL(forkpty)(amaster, name, termp, winp); 1368 if (res != -1) 1369 __msan_unpoison(amaster, sizeof(*amaster)); 1370 return res; 1371 } 1372 1373 struct MSanInterceptorContext { 1374 bool in_interceptor_scope; 1375 }; 1376 1377 namespace __msan { 1378 1379 int OnExit() { 1380 // FIXME: ask frontend whether we need to return failure. 1381 return 0; 1382 } 1383 1384 } // namespace __msan 1385 1386 // A version of CHECK_UNPOISONED using a saved scope value. Used in common 1387 // interceptors. 1388 #define CHECK_UNPOISONED_CTX(ctx, x, n) \ 1389 do { \ 1390 if (!((MSanInterceptorContext *)ctx)->in_interceptor_scope) \ 1391 CHECK_UNPOISONED_0(x, n); \ 1392 } while (0) 1393 1394 #define MSAN_INTERCEPT_FUNC(name) \ 1395 do { \ 1396 if ((!INTERCEPT_FUNCTION(name) || !REAL(name))) \ 1397 VReport(1, "MemorySanitizer: failed to intercept '" #name "'\n"); \ 1398 } while (0) 1399 1400 #define COMMON_INTERCEPT_FUNCTION(name) MSAN_INTERCEPT_FUNC(name) 1401 #define COMMON_INTERCEPTOR_UNPOISON_PARAM(count) \ 1402 UnpoisonParam(count) 1403 #define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \ 1404 __msan_unpoison(ptr, size) 1405 #define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) \ 1406 CHECK_UNPOISONED_CTX(ctx, ptr, size) 1407 #define COMMON_INTERCEPTOR_INITIALIZE_RANGE(ptr, size) \ 1408 __msan_unpoison(ptr, size) 1409 #define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \ 1410 if (msan_init_is_running) return REAL(func)(__VA_ARGS__); \ 1411 MSanInterceptorContext msan_ctx = {IsInInterceptorScope()}; \ 1412 ctx = (void *)&msan_ctx; \ 1413 (void)ctx; \ 1414 InterceptorScope interceptor_scope; \ 1415 __msan_unpoison(__errno_location(), sizeof(int)); /* NOLINT */ \ 1416 ENSURE_MSAN_INITED(); 1417 #define COMMON_INTERCEPTOR_DIR_ACQUIRE(ctx, path) \ 1418 do { \ 1419 } while (false) 1420 #define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) \ 1421 do { \ 1422 } while (false) 1423 #define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd) \ 1424 do { \ 1425 } while (false) 1426 #define COMMON_INTERCEPTOR_FD_SOCKET_ACCEPT(ctx, fd, newfd) \ 1427 do { \ 1428 } while (false) 1429 #define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name) \ 1430 do { \ 1431 } while (false) // FIXME 1432 #define COMMON_INTERCEPTOR_SET_PTHREAD_NAME(ctx, thread, name) \ 1433 do { \ 1434 } while (false) // FIXME 1435 #define COMMON_INTERCEPTOR_BLOCK_REAL(name) REAL(name) 1436 #define COMMON_INTERCEPTOR_ON_EXIT(ctx) OnExit() 1437 #define COMMON_INTERCEPTOR_LIBRARY_LOADED(filename, handle) \ 1438 do { \ 1439 link_map *map = GET_LINK_MAP_BY_DLOPEN_HANDLE((handle)); \ 1440 if (filename && map) \ 1441 ForEachMappedRegion(map, __msan_unpoison); \ 1442 } while (false) 1443 1444 #define COMMON_INTERCEPTOR_GET_TLS_RANGE(begin, end) \ 1445 if (MsanThread *t = GetCurrentThread()) { \ 1446 *begin = t->tls_begin(); \ 1447 *end = t->tls_end(); \ 1448 } else { \ 1449 *begin = *end = 0; \ 1450 } 1451 1452 #include "sanitizer_common/sanitizer_common_interceptors.inc" 1453 1454 #define COMMON_SYSCALL_PRE_READ_RANGE(p, s) CHECK_UNPOISONED(p, s) 1455 #define COMMON_SYSCALL_PRE_WRITE_RANGE(p, s) \ 1456 do { \ 1457 } while (false) 1458 #define COMMON_SYSCALL_POST_READ_RANGE(p, s) \ 1459 do { \ 1460 } while (false) 1461 #define COMMON_SYSCALL_POST_WRITE_RANGE(p, s) __msan_unpoison(p, s) 1462 #include "sanitizer_common/sanitizer_common_syscalls.inc" 1463 1464 // These interface functions reside here so that they can use 1465 // REAL(memset), etc. 1466 void __msan_unpoison(const void *a, uptr size) { 1467 if (!MEM_IS_APP(a)) return; 1468 SetShadow(a, size, 0); 1469 } 1470 1471 void __msan_poison(const void *a, uptr size) { 1472 if (!MEM_IS_APP(a)) return; 1473 SetShadow(a, size, __msan::flags()->poison_heap_with_zeroes ? 0 : -1); 1474 } 1475 1476 void __msan_poison_stack(void *a, uptr size) { 1477 if (!MEM_IS_APP(a)) return; 1478 SetShadow(a, size, __msan::flags()->poison_stack_with_zeroes ? 0 : -1); 1479 } 1480 1481 void __msan_clear_and_unpoison(void *a, uptr size) { 1482 REAL(memset)(a, 0, size); 1483 SetShadow(a, size, 0); 1484 } 1485 1486 void *__msan_memcpy(void *dest, const void *src, SIZE_T n) { 1487 if (!msan_inited) return internal_memcpy(dest, src, n); 1488 if (msan_init_is_running || __msan::IsInSymbolizer()) 1489 return REAL(memcpy)(dest, src, n); 1490 ENSURE_MSAN_INITED(); 1491 GET_STORE_STACK_TRACE; 1492 void *res = REAL(memcpy)(dest, src, n); 1493 CopyShadowAndOrigin(dest, src, n, &stack); 1494 return res; 1495 } 1496 1497 void *__msan_memset(void *s, int c, SIZE_T n) { 1498 if (!msan_inited) return internal_memset(s, c, n); 1499 if (msan_init_is_running) return REAL(memset)(s, c, n); 1500 ENSURE_MSAN_INITED(); 1501 void *res = REAL(memset)(s, c, n); 1502 __msan_unpoison(s, n); 1503 return res; 1504 } 1505 1506 void *__msan_memmove(void *dest, const void *src, SIZE_T n) { 1507 if (!msan_inited) return internal_memmove(dest, src, n); 1508 if (msan_init_is_running) return REAL(memmove)(dest, src, n); 1509 ENSURE_MSAN_INITED(); 1510 GET_STORE_STACK_TRACE; 1511 void *res = REAL(memmove)(dest, src, n); 1512 MoveShadowAndOrigin(dest, src, n, &stack); 1513 return res; 1514 } 1515 1516 void __msan_unpoison_string(const char* s) { 1517 if (!MEM_IS_APP(s)) return; 1518 __msan_unpoison(s, REAL(strlen)(s) + 1); 1519 } 1520 1521 namespace __msan { 1522 1523 void InitializeInterceptors() { 1524 static int inited = 0; 1525 CHECK_EQ(inited, 0); 1526 InitializeCommonInterceptors(); 1527 1528 INTERCEPT_FUNCTION(mmap); 1529 MSAN_MAYBE_INTERCEPT_MMAP64; 1530 INTERCEPT_FUNCTION(posix_memalign); 1531 MSAN_MAYBE_INTERCEPT_MEMALIGN; 1532 INTERCEPT_FUNCTION(__libc_memalign); 1533 INTERCEPT_FUNCTION(valloc); 1534 MSAN_MAYBE_INTERCEPT_PVALLOC; 1535 INTERCEPT_FUNCTION(malloc); 1536 INTERCEPT_FUNCTION(calloc); 1537 INTERCEPT_FUNCTION(realloc); 1538 INTERCEPT_FUNCTION(free); 1539 MSAN_MAYBE_INTERCEPT_CFREE; 1540 INTERCEPT_FUNCTION(malloc_usable_size); 1541 MSAN_MAYBE_INTERCEPT_MALLINFO; 1542 MSAN_MAYBE_INTERCEPT_MALLOPT; 1543 MSAN_MAYBE_INTERCEPT_MALLOC_STATS; 1544 INTERCEPT_FUNCTION(fread); 1545 MSAN_MAYBE_INTERCEPT_FREAD_UNLOCKED; 1546 INTERCEPT_FUNCTION(readlink); 1547 INTERCEPT_FUNCTION(memcpy); 1548 INTERCEPT_FUNCTION(memccpy); 1549 INTERCEPT_FUNCTION(mempcpy); 1550 INTERCEPT_FUNCTION(memset); 1551 INTERCEPT_FUNCTION(memmove); 1552 INTERCEPT_FUNCTION(bcopy); 1553 INTERCEPT_FUNCTION(wmemset); 1554 INTERCEPT_FUNCTION(wmemcpy); 1555 INTERCEPT_FUNCTION(wmempcpy); 1556 INTERCEPT_FUNCTION(wmemmove); 1557 INTERCEPT_FUNCTION(strcpy); // NOLINT 1558 INTERCEPT_FUNCTION(stpcpy); // NOLINT 1559 INTERCEPT_FUNCTION(strdup); 1560 MSAN_MAYBE_INTERCEPT___STRDUP; 1561 INTERCEPT_FUNCTION(strndup); 1562 MSAN_MAYBE_INTERCEPT___STRNDUP; 1563 INTERCEPT_FUNCTION(strncpy); // NOLINT 1564 INTERCEPT_FUNCTION(strlen); 1565 INTERCEPT_FUNCTION(strnlen); 1566 INTERCEPT_FUNCTION(gcvt); 1567 INTERCEPT_FUNCTION(strcat); // NOLINT 1568 INTERCEPT_FUNCTION(strncat); // NOLINT 1569 INTERCEPT_STRTO(strtod); 1570 INTERCEPT_STRTO(strtof); 1571 INTERCEPT_STRTO(strtold); 1572 INTERCEPT_STRTO(strtol); 1573 INTERCEPT_STRTO(strtoul); 1574 INTERCEPT_STRTO(strtoll); 1575 INTERCEPT_STRTO(strtoull); 1576 INTERCEPT_STRTO(wcstod); 1577 INTERCEPT_STRTO(wcstof); 1578 INTERCEPT_STRTO(wcstold); 1579 INTERCEPT_STRTO(wcstol); 1580 INTERCEPT_STRTO(wcstoul); 1581 INTERCEPT_STRTO(wcstoll); 1582 INTERCEPT_STRTO(wcstoull); 1583 INTERCEPT_FUNCTION(vswprintf); 1584 INTERCEPT_FUNCTION(swprintf); 1585 INTERCEPT_FUNCTION(strxfrm); 1586 INTERCEPT_FUNCTION(strxfrm_l); 1587 INTERCEPT_FUNCTION(strftime); 1588 INTERCEPT_FUNCTION(strftime_l); 1589 MSAN_MAYBE_INTERCEPT___STRFTIME_L; 1590 INTERCEPT_FUNCTION(wcsftime); 1591 INTERCEPT_FUNCTION(wcsftime_l); 1592 MSAN_MAYBE_INTERCEPT___WCSFTIME_L; 1593 INTERCEPT_FUNCTION(mbtowc); 1594 INTERCEPT_FUNCTION(mbrtowc); 1595 INTERCEPT_FUNCTION(wcslen); 1596 INTERCEPT_FUNCTION(wcschr); 1597 INTERCEPT_FUNCTION(wcscpy); 1598 INTERCEPT_FUNCTION(wcscmp); 1599 INTERCEPT_FUNCTION(getenv); 1600 INTERCEPT_FUNCTION(setenv); 1601 INTERCEPT_FUNCTION(putenv); 1602 INTERCEPT_FUNCTION(gettimeofday); 1603 INTERCEPT_FUNCTION(fcvt); 1604 MSAN_MAYBE_INTERCEPT___FXSTAT; 1605 MSAN_INTERCEPT_FSTATAT; 1606 MSAN_INTERCEPT_STAT; 1607 MSAN_MAYBE_INTERCEPT___LXSTAT; 1608 MSAN_MAYBE_INTERCEPT___FXSTAT64; 1609 MSAN_MAYBE_INTERCEPT___FXSTATAT64; 1610 MSAN_MAYBE_INTERCEPT___XSTAT64; 1611 MSAN_MAYBE_INTERCEPT___LXSTAT64; 1612 INTERCEPT_FUNCTION(pipe); 1613 INTERCEPT_FUNCTION(pipe2); 1614 INTERCEPT_FUNCTION(socketpair); 1615 INTERCEPT_FUNCTION(fgets); 1616 MSAN_MAYBE_INTERCEPT_FGETS_UNLOCKED; 1617 INTERCEPT_FUNCTION(getrlimit); 1618 MSAN_MAYBE_INTERCEPT_GETRLIMIT64; 1619 MSAN_INTERCEPT_UNAME; 1620 INTERCEPT_FUNCTION(gethostname); 1621 MSAN_MAYBE_INTERCEPT_EPOLL_WAIT; 1622 MSAN_MAYBE_INTERCEPT_EPOLL_PWAIT; 1623 INTERCEPT_FUNCTION(recv); 1624 INTERCEPT_FUNCTION(recvfrom); 1625 INTERCEPT_FUNCTION(dladdr); 1626 INTERCEPT_FUNCTION(dlerror); 1627 INTERCEPT_FUNCTION(dl_iterate_phdr); 1628 INTERCEPT_FUNCTION(getrusage); 1629 INTERCEPT_FUNCTION(sigaction); 1630 INTERCEPT_FUNCTION(signal); 1631 INTERCEPT_FUNCTION(pthread_create); 1632 INTERCEPT_FUNCTION(pthread_key_create); 1633 INTERCEPT_FUNCTION(pthread_join); 1634 INTERCEPT_FUNCTION(tzset); 1635 INTERCEPT_FUNCTION(__cxa_atexit); 1636 INTERCEPT_FUNCTION(shmat); 1637 INTERCEPT_FUNCTION(fork); 1638 INTERCEPT_FUNCTION(openpty); 1639 INTERCEPT_FUNCTION(forkpty); 1640 1641 inited = 1; 1642 } 1643 } // namespace __msan 1644
