msan_interceptors.cc revision 801448950d645813efb398575bbc62b48e5b1dfc
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 do { \ 75 if (!IsInInterceptorScope()) CHECK_UNPOISONED_0(x, n); \ 76 } while (0); 77 78static void *fast_memset(void *ptr, int c, SIZE_T n); 79static void *fast_memcpy(void *dst, const void *src, SIZE_T n); 80 81INTERCEPTOR(SIZE_T, fread, void *ptr, SIZE_T size, SIZE_T nmemb, void *file) { 82 ENSURE_MSAN_INITED(); 83 SIZE_T res = REAL(fread)(ptr, size, nmemb, file); 84 if (res > 0) 85 __msan_unpoison(ptr, res *size); 86 return res; 87} 88 89INTERCEPTOR(SIZE_T, fread_unlocked, void *ptr, SIZE_T size, SIZE_T nmemb, 90 void *file) { 91 ENSURE_MSAN_INITED(); 92 SIZE_T res = REAL(fread_unlocked)(ptr, size, nmemb, file); 93 if (res > 0) 94 __msan_unpoison(ptr, res *size); 95 return res; 96} 97 98INTERCEPTOR(SSIZE_T, readlink, const char *path, char *buf, SIZE_T bufsiz) { 99 ENSURE_MSAN_INITED(); 100 SSIZE_T res = REAL(readlink)(path, buf, bufsiz); 101 if (res > 0) 102 __msan_unpoison(buf, res); 103 return res; 104} 105 106INTERCEPTOR(void *, memcpy, void *dest, const void *src, SIZE_T n) { 107 return __msan_memcpy(dest, src, n); 108} 109 110INTERCEPTOR(void *, memmove, void *dest, const void *src, SIZE_T n) { 111 return __msan_memmove(dest, src, n); 112} 113 114INTERCEPTOR(void *, memset, void *s, int c, SIZE_T n) { 115 return __msan_memset(s, c, n); 116} 117 118INTERCEPTOR(int, posix_memalign, void **memptr, SIZE_T alignment, SIZE_T size) { 119 GET_MALLOC_STACK_TRACE; 120 CHECK_EQ(alignment & (alignment - 1), 0); 121 CHECK_NE(memptr, 0); 122 *memptr = MsanReallocate(&stack, 0, size, alignment, false); 123 CHECK_NE(*memptr, 0); 124 __msan_unpoison(memptr, sizeof(*memptr)); 125 return 0; 126} 127 128INTERCEPTOR(void, free, void *ptr) { 129 ENSURE_MSAN_INITED(); 130 if (ptr == 0) return; 131 MsanDeallocate(ptr); 132} 133 134INTERCEPTOR(SIZE_T, strlen, const char *s) { 135 ENSURE_MSAN_INITED(); 136 SIZE_T res = REAL(strlen)(s); 137 CHECK_UNPOISONED(s, res + 1); 138 return res; 139} 140 141INTERCEPTOR(SIZE_T, strnlen, const char *s, SIZE_T n) { 142 ENSURE_MSAN_INITED(); 143 SIZE_T res = REAL(strnlen)(s, n); 144 SIZE_T scan_size = (res == n) ? res : res + 1; 145 CHECK_UNPOISONED(s, scan_size); 146 return res; 147} 148 149// FIXME: Add stricter shadow checks in str* interceptors (ex.: strcpy should 150// check the shadow of the terminating \0 byte). 151 152INTERCEPTOR(char *, strcpy, char *dest, const char *src) { // NOLINT 153 ENSURE_MSAN_INITED(); 154 SIZE_T n = REAL(strlen)(src); 155 char *res = REAL(strcpy)(dest, src); // NOLINT 156 __msan_copy_poison(dest, src, n + 1); 157 return res; 158} 159 160INTERCEPTOR(char *, strncpy, char *dest, const char *src, SIZE_T n) { // NOLINT 161 ENSURE_MSAN_INITED(); 162 SIZE_T copy_size = REAL(strnlen)(src, n); 163 if (copy_size < n) 164 copy_size++; // trailing \0 165 char *res = REAL(strncpy)(dest, src, n); // NOLINT 166 __msan_copy_poison(dest, src, copy_size); 167 return res; 168} 169 170INTERCEPTOR(char *, stpcpy, char *dest, const char *src) { // NOLINT 171 ENSURE_MSAN_INITED(); 172 SIZE_T n = REAL(strlen)(src); 173 char *res = REAL(stpcpy)(dest, src); // NOLINT 174 __msan_copy_poison(dest, src, n + 1); 175 return res; 176} 177 178INTERCEPTOR(char *, strdup, char *src) { 179 ENSURE_MSAN_INITED(); 180 SIZE_T n = REAL(strlen)(src); 181 char *res = REAL(strdup)(src); 182 __msan_copy_poison(res, src, n + 1); 183 return res; 184} 185 186INTERCEPTOR(char *, __strdup, char *src) { 187 ENSURE_MSAN_INITED(); 188 SIZE_T n = REAL(strlen)(src); 189 char *res = REAL(__strdup)(src); 190 __msan_copy_poison(res, src, n + 1); 191 return res; 192} 193 194INTERCEPTOR(char *, strndup, char *src, SIZE_T n) { 195 ENSURE_MSAN_INITED(); 196 SIZE_T copy_size = REAL(strnlen)(src, n); 197 char *res = REAL(strndup)(src, n); 198 __msan_copy_poison(res, src, copy_size); 199 __msan_unpoison(res + copy_size, 1); // \0 200 return res; 201} 202 203INTERCEPTOR(char *, __strndup, char *src, SIZE_T n) { 204 ENSURE_MSAN_INITED(); 205 SIZE_T copy_size = REAL(strnlen)(src, n); 206 char *res = REAL(__strndup)(src, n); 207 __msan_copy_poison(res, src, copy_size); 208 __msan_unpoison(res + copy_size, 1); // \0 209 return res; 210} 211 212INTERCEPTOR(char *, gcvt, double number, SIZE_T ndigit, char *buf) { 213 ENSURE_MSAN_INITED(); 214 char *res = REAL(gcvt)(number, ndigit, buf); 215 // DynamoRio tool will take care of unpoisoning gcvt result for us. 216 if (!__msan_has_dynamic_component()) { 217 SIZE_T n = REAL(strlen)(buf); 218 __msan_unpoison(buf, n + 1); 219 } 220 return res; 221} 222 223INTERCEPTOR(char *, strcat, char *dest, const char *src) { // NOLINT 224 ENSURE_MSAN_INITED(); 225 SIZE_T src_size = REAL(strlen)(src); 226 SIZE_T dest_size = REAL(strlen)(dest); 227 char *res = REAL(strcat)(dest, src); // NOLINT 228 __msan_copy_poison(dest + dest_size, src, src_size + 1); 229 return res; 230} 231 232INTERCEPTOR(char *, strncat, char *dest, const char *src, SIZE_T n) { // NOLINT 233 ENSURE_MSAN_INITED(); 234 SIZE_T dest_size = REAL(strlen)(dest); 235 SIZE_T copy_size = REAL(strlen)(src); 236 if (copy_size < n) 237 copy_size++; // trailing \0 238 char *res = REAL(strncat)(dest, src, n); // NOLINT 239 __msan_copy_poison(dest + dest_size, src, copy_size); 240 return res; 241} 242 243INTERCEPTOR(long, strtol, const char *nptr, char **endptr, // NOLINT 244 int base) { 245 ENSURE_MSAN_INITED(); 246 long res = REAL(strtol)(nptr, endptr, base); // NOLINT 247 if (!__msan_has_dynamic_component()) { 248 __msan_unpoison(endptr, sizeof(*endptr)); 249 } 250 return res; 251} 252 253INTERCEPTOR(long long, strtoll, const char *nptr, char **endptr, // NOLINT 254 int base) { 255 ENSURE_MSAN_INITED(); 256 long res = REAL(strtoll)(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, strtoul, const char *nptr, char **endptr, // NOLINT 264 int base) { 265 ENSURE_MSAN_INITED(); 266 unsigned long res = REAL(strtoul)(nptr, endptr, base); // NOLINT 267 if (!__msan_has_dynamic_component()) { 268 __msan_unpoison(endptr, sizeof(*endptr)); 269 } 270 return res; 271} 272 273INTERCEPTOR(unsigned long long, strtoull, const char *nptr, // NOLINT 274 char **endptr, int base) { 275 ENSURE_MSAN_INITED(); 276 unsigned long res = REAL(strtoull)(nptr, endptr, base); // NOLINT 277 if (!__msan_has_dynamic_component()) { 278 __msan_unpoison(endptr, sizeof(*endptr)); 279 } 280 return res; 281} 282 283INTERCEPTOR(double, strtod, const char *nptr, char **endptr) { // NOLINT 284 ENSURE_MSAN_INITED(); 285 double res = REAL(strtod)(nptr, endptr); // NOLINT 286 if (!__msan_has_dynamic_component()) { 287 __msan_unpoison(endptr, sizeof(*endptr)); 288 } 289 return res; 290} 291 292INTERCEPTOR(float, strtof, const char *nptr, char **endptr) { // NOLINT 293 ENSURE_MSAN_INITED(); 294 float res = REAL(strtof)(nptr, endptr); // NOLINT 295 if (!__msan_has_dynamic_component()) { 296 __msan_unpoison(endptr, sizeof(*endptr)); 297 } 298 return res; 299} 300 301INTERCEPTOR(long double, strtold, const char *nptr, char **endptr) { // NOLINT 302 ENSURE_MSAN_INITED(); 303 long double res = REAL(strtold)(nptr, endptr); // NOLINT 304 if (!__msan_has_dynamic_component()) { 305 __msan_unpoison(endptr, sizeof(*endptr)); 306 } 307 return res; 308} 309 310INTERCEPTOR(int, vasprintf, char **strp, const char *format, va_list ap) { 311 ENSURE_MSAN_INITED(); 312 int res = REAL(vasprintf)(strp, format, ap); 313 if (res >= 0 && !__msan_has_dynamic_component()) { 314 __msan_unpoison(strp, sizeof(*strp)); 315 __msan_unpoison(*strp, res + 1); 316 } 317 return res; 318} 319 320INTERCEPTOR(int, asprintf, char **strp, const char *format, ...) { // NOLINT 321 ENSURE_MSAN_INITED(); 322 va_list ap; 323 va_start(ap, format); 324 int res = vasprintf(strp, format, ap); // NOLINT 325 va_end(ap); 326 return res; 327} 328 329INTERCEPTOR(int, vsnprintf, char *str, uptr size, 330 const char *format, va_list ap) { 331 ENSURE_MSAN_INITED(); 332 int res = REAL(vsnprintf)(str, size, format, ap); 333 if (res >= 0 && !__msan_has_dynamic_component()) { 334 __msan_unpoison(str, res + 1); 335 } 336 return res; 337} 338 339INTERCEPTOR(int, vsprintf, char *str, const char *format, va_list ap) { 340 ENSURE_MSAN_INITED(); 341 int res = REAL(vsprintf)(str, format, ap); 342 if (res >= 0 && !__msan_has_dynamic_component()) { 343 __msan_unpoison(str, res + 1); 344 } 345 return res; 346} 347 348INTERCEPTOR(int, vswprintf, void *str, uptr size, void *format, va_list ap) { 349 ENSURE_MSAN_INITED(); 350 int res = REAL(vswprintf)(str, size, format, ap); 351 if (res >= 0 && !__msan_has_dynamic_component()) { 352 __msan_unpoison(str, 4 * (res + 1)); 353 } 354 return res; 355} 356 357INTERCEPTOR(int, sprintf, char *str, const char *format, ...) { // NOLINT 358 ENSURE_MSAN_INITED(); 359 va_list ap; 360 va_start(ap, format); 361 int res = vsprintf(str, format, ap); // NOLINT 362 va_end(ap); 363 return res; 364} 365 366INTERCEPTOR(int, snprintf, char *str, uptr size, const char *format, ...) { 367 ENSURE_MSAN_INITED(); 368 va_list ap; 369 va_start(ap, format); 370 int res = vsnprintf(str, size, format, ap); 371 va_end(ap); 372 return res; 373} 374 375INTERCEPTOR(int, swprintf, void *str, uptr size, void *format, ...) { 376 ENSURE_MSAN_INITED(); 377 va_list ap; 378 va_start(ap, format); 379 int res = vswprintf(str, size, format, ap); 380 va_end(ap); 381 return res; 382} 383 384// SIZE_T strftime(char *s, SIZE_T max, const char *format,const struct tm *tm); 385INTERCEPTOR(SIZE_T, strftime, char *s, SIZE_T max, const char *format, 386 void *tm) { 387 ENSURE_MSAN_INITED(); 388 SIZE_T res = REAL(strftime)(s, max, format, tm); 389 if (res) __msan_unpoison(s, res + 1); 390 return res; 391} 392 393INTERCEPTOR(SIZE_T, wcstombs, void *dest, void *src, SIZE_T size) { 394 ENSURE_MSAN_INITED(); 395 SIZE_T res = REAL(wcstombs)(dest, src, size); 396 if (res != (SIZE_T)-1) __msan_unpoison(dest, res + 1); 397 return res; 398} 399 400// SIZE_T mbstowcs(wchar_t *dest, const char *src, SIZE_T n); 401INTERCEPTOR(SIZE_T, mbstowcs, wchar_t *dest, const char *src, SIZE_T n) { 402 ENSURE_MSAN_INITED(); 403 SIZE_T res = REAL(mbstowcs)(dest, src, n); 404 if (res != (SIZE_T)-1) __msan_unpoison(dest, (res + 1) * sizeof(wchar_t)); 405 return res; 406} 407 408INTERCEPTOR(int, mbtowc, wchar_t *dest, const char *src, SIZE_T n) { 409 ENSURE_MSAN_INITED(); 410 int res = REAL(mbtowc)(dest, src, n); 411 if (res != -1 && dest) __msan_unpoison(dest, sizeof(wchar_t)); 412 return res; 413} 414 415INTERCEPTOR(int, mbrtowc, wchar_t *dest, const char *src, SIZE_T n, void *ps) { 416 ENSURE_MSAN_INITED(); 417 SIZE_T res = REAL(mbrtowc)(dest, src, n, ps); 418 if (res != (SIZE_T)-1 && dest) __msan_unpoison(dest, sizeof(wchar_t)); 419 return res; 420} 421 422INTERCEPTOR(SIZE_T, wcslen, const wchar_t *s) { 423 ENSURE_MSAN_INITED(); 424 SIZE_T res = REAL(wcslen)(s); 425 CHECK_UNPOISONED(s, sizeof(wchar_t) * (res + 1)); 426 return res; 427} 428 429// wchar_t *wcschr(const wchar_t *wcs, wchar_t wc); 430INTERCEPTOR(wchar_t *, wcschr, void *s, wchar_t wc, void *ps) { 431 ENSURE_MSAN_INITED(); 432 wchar_t *res = REAL(wcschr)(s, wc, ps); 433 return res; 434} 435 436// wchar_t *wcscpy(wchar_t *dest, const wchar_t *src); 437INTERCEPTOR(wchar_t *, wcscpy, wchar_t *dest, const wchar_t *src) { 438 ENSURE_MSAN_INITED(); 439 wchar_t *res = REAL(wcscpy)(dest, src); 440 __msan_copy_poison(dest, src, sizeof(wchar_t) * (REAL(wcslen)(src) + 1)); 441 return res; 442} 443 444// wchar_t *wmemcpy(wchar_t *dest, const wchar_t *src, SIZE_T n); 445INTERCEPTOR(wchar_t *, wmemcpy, wchar_t *dest, const wchar_t *src, SIZE_T n) { 446 ENSURE_MSAN_INITED(); 447 wchar_t *res = REAL(wmemcpy)(dest, src, n); 448 __msan_copy_poison(dest, src, n * sizeof(wchar_t)); 449 return res; 450} 451 452INTERCEPTOR(wchar_t *, wmemset, wchar_t *s, wchar_t c, SIZE_T n) { 453 CHECK(MEM_IS_APP(s)); 454 ENSURE_MSAN_INITED(); 455 wchar_t *res = (wchar_t *)fast_memset(s, c, n * sizeof(wchar_t)); 456 __msan_unpoison(s, n * sizeof(wchar_t)); 457 return res; 458} 459 460INTERCEPTOR(wchar_t *, wmemmove, wchar_t *dest, const wchar_t *src, SIZE_T n) { 461 ENSURE_MSAN_INITED(); 462 wchar_t *res = REAL(wmemmove)(dest, src, n); 463 __msan_move_poison(dest, src, n * sizeof(wchar_t)); 464 return res; 465} 466 467INTERCEPTOR(int, wcscmp, const wchar_t *s1, const wchar_t *s2) { 468 ENSURE_MSAN_INITED(); 469 int res = REAL(wcscmp)(s1, s2); 470 return res; 471} 472 473INTERCEPTOR(double, wcstod, const wchar_t *nptr, wchar_t **endptr) { 474 ENSURE_MSAN_INITED(); 475 double res = REAL(wcstod)(nptr, endptr); 476 __msan_unpoison(endptr, sizeof(*endptr)); 477 return res; 478} 479 480// #define UNSUPPORTED(name) \ 481// INTERCEPTOR(void, name, void) { \ 482// Printf("MSAN: Unsupported %s\n", __FUNCTION__); \ 483// Die(); \ 484// } 485 486// FIXME: intercept the following functions: 487// Note, they only matter when running without a dynamic tool. 488// UNSUPPORTED(wcscoll_l) 489// UNSUPPORTED(wcsnrtombs) 490// UNSUPPORTED(wcstol) 491// UNSUPPORTED(wcstoll) 492// UNSUPPORTED(wcstold) 493// UNSUPPORTED(wcstoul) 494// UNSUPPORTED(wcstoull) 495// UNSUPPORTED(wcsxfrm_l) 496// UNSUPPORTED(wcsdup) 497// UNSUPPORTED(wcsftime) 498// UNSUPPORTED(wcsstr) 499// UNSUPPORTED(wcsrchr) 500// UNSUPPORTED(wctob) 501 502INTERCEPTOR(int, gettimeofday, void *tv, void *tz) { 503 ENSURE_MSAN_INITED(); 504 int res = REAL(gettimeofday)(tv, tz); 505 if (tv) 506 __msan_unpoison(tv, 16); 507 if (tz) 508 __msan_unpoison(tz, 8); 509 return res; 510} 511 512INTERCEPTOR(char *, fcvt, double x, int a, int *b, int *c) { 513 ENSURE_MSAN_INITED(); 514 char *res = REAL(fcvt)(x, a, b, c); 515 if (!__msan_has_dynamic_component()) { 516 __msan_unpoison(b, sizeof(*b)); 517 __msan_unpoison(c, sizeof(*c)); 518 } 519 return res; 520} 521 522INTERCEPTOR(char *, getenv, char *name) { 523 ENSURE_MSAN_INITED(); 524 char *res = REAL(getenv)(name); 525 if (!__msan_has_dynamic_component()) { 526 if (res) 527 __msan_unpoison(res, REAL(strlen)(res) + 1); 528 } 529 return res; 530} 531 532INTERCEPTOR(int, __fxstat, int magic, int fd, void *buf) { 533 ENSURE_MSAN_INITED(); 534 int res = REAL(__fxstat)(magic, fd, buf); 535 if (!res) 536 __msan_unpoison(buf, __sanitizer::struct_stat_sz); 537 return res; 538} 539 540INTERCEPTOR(int, __fxstat64, int magic, int fd, void *buf) { 541 ENSURE_MSAN_INITED(); 542 int res = REAL(__fxstat64)(magic, fd, buf); 543 if (!res) 544 __msan_unpoison(buf, __sanitizer::struct_stat64_sz); 545 return res; 546} 547 548INTERCEPTOR(int, __xstat, int magic, char *path, void *buf) { 549 ENSURE_MSAN_INITED(); 550 int res = REAL(__xstat)(magic, path, buf); 551 if (!res) 552 __msan_unpoison(buf, __sanitizer::struct_stat_sz); 553 return res; 554} 555 556INTERCEPTOR(int, __xstat64, int magic, char *path, void *buf) { 557 ENSURE_MSAN_INITED(); 558 int res = REAL(__xstat64)(magic, path, buf); 559 if (!res) 560 __msan_unpoison(buf, __sanitizer::struct_stat64_sz); 561 return res; 562} 563 564INTERCEPTOR(int, __lxstat, int magic, char *path, void *buf) { 565 ENSURE_MSAN_INITED(); 566 int res = REAL(__lxstat)(magic, path, buf); 567 if (!res) 568 __msan_unpoison(buf, __sanitizer::struct_stat_sz); 569 return res; 570} 571 572INTERCEPTOR(int, __lxstat64, int magic, char *path, void *buf) { 573 ENSURE_MSAN_INITED(); 574 int res = REAL(__lxstat64)(magic, path, buf); 575 if (!res) 576 __msan_unpoison(buf, __sanitizer::struct_stat64_sz); 577 return res; 578} 579 580INTERCEPTOR(int, pipe, int pipefd[2]) { 581 if (msan_init_is_running) 582 return REAL(pipe)(pipefd); 583 ENSURE_MSAN_INITED(); 584 int res = REAL(pipe)(pipefd); 585 if (!res) 586 __msan_unpoison(pipefd, sizeof(int[2])); 587 return res; 588} 589 590INTERCEPTOR(int, pipe2, int pipefd[2], int flags) { 591 ENSURE_MSAN_INITED(); 592 int res = REAL(pipe2)(pipefd, flags); 593 if (!res) 594 __msan_unpoison(pipefd, sizeof(int[2])); 595 return res; 596} 597 598INTERCEPTOR(int, socketpair, int domain, int type, int protocol, int sv[2]) { 599 ENSURE_MSAN_INITED(); 600 int res = REAL(socketpair)(domain, type, protocol, sv); 601 if (!res) 602 __msan_unpoison(sv, sizeof(int[2])); 603 return res; 604} 605 606INTERCEPTOR(char *, fgets, char *s, int size, void *stream) { 607 ENSURE_MSAN_INITED(); 608 char *res = REAL(fgets)(s, size, stream); 609 if (res) 610 __msan_unpoison(s, REAL(strlen)(s) + 1); 611 return res; 612} 613 614INTERCEPTOR(char *, fgets_unlocked, char *s, int size, void *stream) { 615 ENSURE_MSAN_INITED(); 616 char *res = REAL(fgets_unlocked)(s, size, stream); 617 if (res) 618 __msan_unpoison(s, REAL(strlen)(s) + 1); 619 return res; 620} 621 622INTERCEPTOR(char *, realpath, char *path, char *abspath) { 623 ENSURE_MSAN_INITED(); 624 char *res = REAL(realpath)(path, abspath); 625 if (res) 626 __msan_unpoison(abspath, REAL(strlen)(abspath) + 1); 627 return res; 628} 629 630INTERCEPTOR(int, getrlimit, int resource, void *rlim) { 631 if (msan_init_is_running) 632 return REAL(getrlimit)(resource, rlim); 633 ENSURE_MSAN_INITED(); 634 int res = REAL(getrlimit)(resource, rlim); 635 if (!res) 636 __msan_unpoison(rlim, __sanitizer::struct_rlimit_sz); 637 return res; 638} 639 640INTERCEPTOR(int, getrlimit64, int resource, void *rlim) { 641 if (msan_init_is_running) 642 return REAL(getrlimit64)(resource, rlim); 643 ENSURE_MSAN_INITED(); 644 int res = REAL(getrlimit64)(resource, rlim); 645 if (!res) 646 __msan_unpoison(rlim, __sanitizer::struct_rlimit64_sz); 647 return res; 648} 649 650INTERCEPTOR(int, statfs, const char *s, void *buf) { 651 ENSURE_MSAN_INITED(); 652 int res = REAL(statfs)(s, buf); 653 if (!res) 654 __msan_unpoison(buf, __sanitizer::struct_statfs_sz); 655 return res; 656} 657 658INTERCEPTOR(int, fstatfs, int fd, void *buf) { 659 ENSURE_MSAN_INITED(); 660 int res = REAL(fstatfs)(fd, buf); 661 if (!res) 662 __msan_unpoison(buf, __sanitizer::struct_statfs_sz); 663 return res; 664} 665 666INTERCEPTOR(int, statfs64, const char *s, void *buf) { 667 ENSURE_MSAN_INITED(); 668 int res = REAL(statfs64)(s, buf); 669 if (!res) 670 __msan_unpoison(buf, __sanitizer::struct_statfs64_sz); 671 return res; 672} 673 674INTERCEPTOR(int, fstatfs64, int fd, void *buf) { 675 ENSURE_MSAN_INITED(); 676 int res = REAL(fstatfs64)(fd, buf); 677 if (!res) 678 __msan_unpoison(buf, __sanitizer::struct_statfs64_sz); 679 return res; 680} 681 682INTERCEPTOR(int, uname, void *utsname) { 683 ENSURE_MSAN_INITED(); 684 int res = REAL(uname)(utsname); 685 if (!res) { 686 __msan_unpoison(utsname, __sanitizer::struct_utsname_sz); 687 } 688 return res; 689} 690 691INTERCEPTOR(int, gethostname, char *name, SIZE_T len) { 692 ENSURE_MSAN_INITED(); 693 int res = REAL(gethostname)(name, len); 694 if (!res) { 695 SIZE_T real_len = REAL(strnlen)(name, len); 696 if (real_len < len) 697 ++real_len; 698 __msan_unpoison(name, real_len); 699 } 700 return res; 701} 702 703INTERCEPTOR(int, epoll_wait, int epfd, void *events, int maxevents, 704 int timeout) { 705 ENSURE_MSAN_INITED(); 706 int res = REAL(epoll_wait)(epfd, events, maxevents, timeout); 707 if (res > 0) { 708 __msan_unpoison(events, __sanitizer::struct_epoll_event_sz * res); 709 } 710 return res; 711} 712 713INTERCEPTOR(int, epoll_pwait, int epfd, void *events, int maxevents, 714 int timeout, void *sigmask) { 715 ENSURE_MSAN_INITED(); 716 int res = REAL(epoll_pwait)(epfd, events, maxevents, timeout, sigmask); 717 if (res > 0) { 718 __msan_unpoison(events, __sanitizer::struct_epoll_event_sz * res); 719 } 720 return res; 721} 722 723INTERCEPTOR(SSIZE_T, recv, int fd, void *buf, SIZE_T len, int flags) { 724 ENSURE_MSAN_INITED(); 725 SSIZE_T res = REAL(recv)(fd, buf, len, flags); 726 if (res > 0) 727 __msan_unpoison(buf, res); 728 return res; 729} 730 731INTERCEPTOR(SSIZE_T, recvfrom, int fd, void *buf, SIZE_T len, int flags, 732 void *srcaddr, int *addrlen) { 733 ENSURE_MSAN_INITED(); 734 SIZE_T srcaddr_sz; 735 if (srcaddr) srcaddr_sz = *addrlen; 736 SSIZE_T res = REAL(recvfrom)(fd, buf, len, flags, srcaddr, addrlen); 737 if (res > 0) { 738 __msan_unpoison(buf, res); 739 if (srcaddr) { 740 SIZE_T sz = *addrlen; 741 __msan_unpoison(srcaddr, (sz < srcaddr_sz) ? sz : srcaddr_sz); 742 } 743 } 744 return res; 745} 746 747INTERCEPTOR(void *, calloc, SIZE_T nmemb, SIZE_T size) { 748 if (CallocShouldReturnNullDueToOverflow(size, nmemb)) return 0; 749 GET_MALLOC_STACK_TRACE; 750 if (!msan_inited) { 751 // Hack: dlsym calls calloc before REAL(calloc) is retrieved from dlsym. 752 const SIZE_T kCallocPoolSize = 1024; 753 static uptr calloc_memory_for_dlsym[kCallocPoolSize]; 754 static SIZE_T allocated; 755 SIZE_T size_in_words = ((nmemb * size) + kWordSize - 1) / kWordSize; 756 void *mem = (void*)&calloc_memory_for_dlsym[allocated]; 757 allocated += size_in_words; 758 CHECK(allocated < kCallocPoolSize); 759 return mem; 760 } 761 return MsanReallocate(&stack, 0, nmemb * size, sizeof(u64), true); 762} 763 764INTERCEPTOR(void *, realloc, void *ptr, SIZE_T size) { 765 GET_MALLOC_STACK_TRACE; 766 return MsanReallocate(&stack, ptr, size, sizeof(u64), false); 767} 768 769INTERCEPTOR(void *, malloc, SIZE_T size) { 770 GET_MALLOC_STACK_TRACE; 771 return MsanReallocate(&stack, 0, size, sizeof(u64), false); 772} 773 774void __msan_allocated_memory(const void* data, uptr size) { 775 GET_MALLOC_STACK_TRACE; 776 if (flags()->poison_in_malloc) 777 __msan_poison(data, size); 778 if (__msan_get_track_origins()) { 779 u32 stack_id = StackDepotPut(stack.trace, stack.size); 780 CHECK(stack_id); 781 CHECK_EQ((stack_id >> 31), 0); // Higher bit is occupied by stack origins. 782 __msan_set_origin(data, size, stack_id); 783 } 784} 785 786INTERCEPTOR(void *, mmap, void *addr, SIZE_T length, int prot, int flags, 787 int fd, OFF_T offset) { 788 ENSURE_MSAN_INITED(); 789 void *res = REAL(mmap)(addr, length, prot, flags, fd, offset); 790 if (res != (void*)-1) 791 __msan_unpoison(res, RoundUpTo(length, GetPageSize())); 792 return res; 793} 794 795INTERCEPTOR(void *, mmap64, void *addr, SIZE_T length, int prot, int flags, 796 int fd, OFF64_T offset) { 797 ENSURE_MSAN_INITED(); 798 void *res = REAL(mmap64)(addr, length, prot, flags, fd, offset); 799 if (res != (void*)-1) 800 __msan_unpoison(res, RoundUpTo(length, GetPageSize())); 801 return res; 802} 803 804struct dlinfo { 805 char *dli_fname; 806 void *dli_fbase; 807 char *dli_sname; 808 void *dli_saddr; 809}; 810 811INTERCEPTOR(int, dladdr, void *addr, dlinfo *info) { 812 ENSURE_MSAN_INITED(); 813 int res = REAL(dladdr)(addr, info); 814 if (res != 0) { 815 __msan_unpoison(info, sizeof(*info)); 816 if (info->dli_fname) 817 __msan_unpoison(info->dli_fname, REAL(strlen)(info->dli_fname) + 1); 818 if (info->dli_sname) 819 __msan_unpoison(info->dli_sname, REAL(strlen)(info->dli_sname) + 1); 820 } 821 return res; 822} 823 824// dlopen() ultimately calls mmap() down inside the loader, which generally 825// doesn't participate in dynamic symbol resolution. Therefore we won't 826// intercept its calls to mmap, and we have to hook it here. The loader 827// initializes the module before returning, so without the dynamic component, we 828// won't be able to clear the shadow before the initializers. Fixing this would 829// require putting our own initializer first to clear the shadow. 830INTERCEPTOR(void *, dlopen, const char *filename, int flag) { 831 ENSURE_MSAN_INITED(); 832 EnterLoader(); 833 link_map *map = (link_map *)REAL(dlopen)(filename, flag); 834 ExitLoader(); 835 if (!__msan_has_dynamic_component() && map) { 836 // If msandr didn't clear the shadow before the initializers ran, we do it 837 // ourselves afterwards. 838 UnpoisonMappedDSO(map); 839 } 840 return (void *)map; 841} 842 843typedef int (*dl_iterate_phdr_cb)(__sanitizer_dl_phdr_info *info, SIZE_T size, 844 void *data); 845struct dl_iterate_phdr_data { 846 dl_iterate_phdr_cb callback; 847 void *data; 848}; 849 850static int msan_dl_iterate_phdr_cb(__sanitizer_dl_phdr_info *info, SIZE_T size, 851 void *data) { 852 if (info) { 853 __msan_unpoison(info, size); 854 if (info->dlpi_name) 855 __msan_unpoison(info->dlpi_name, REAL(strlen)(info->dlpi_name) + 1); 856 } 857 dl_iterate_phdr_data *cbdata = (dl_iterate_phdr_data *)data; 858 UnpoisonParam(3); 859 return cbdata->callback(info, size, cbdata->data); 860} 861 862INTERCEPTOR(int, dl_iterate_phdr, dl_iterate_phdr_cb callback, void *data) { 863 ENSURE_MSAN_INITED(); 864 EnterLoader(); 865 dl_iterate_phdr_data cbdata; 866 cbdata.callback = callback; 867 cbdata.data = data; 868 int res = REAL(dl_iterate_phdr)(msan_dl_iterate_phdr_cb, (void *)&cbdata); 869 ExitLoader(); 870 return res; 871} 872 873INTERCEPTOR(int, getrusage, int who, void *usage) { 874 ENSURE_MSAN_INITED(); 875 int res = REAL(getrusage)(who, usage); 876 if (res == 0) { 877 __msan_unpoison(usage, __sanitizer::struct_rusage_sz); 878 } 879 return res; 880} 881 882const int kMaxSignals = 1024; 883static uptr sigactions[kMaxSignals]; 884static StaticSpinMutex sigactions_mu; 885 886static void SignalHandler(int signo) { 887 typedef void (*signal_cb)(int x); 888 signal_cb cb = (signal_cb)sigactions[signo]; 889 cb(signo); 890} 891 892static void SignalAction(int signo, void *si, void *uc) { 893 UnpoisonParam(3); 894 __msan_unpoison(si, __sanitizer::struct_sigaction_sz); 895 __msan_unpoison(uc, __sanitizer::ucontext_t_sz); 896 897 typedef void (*sigaction_cb)(int, void *, void *); 898 sigaction_cb cb = (sigaction_cb)sigactions[signo]; 899 cb(signo, si, uc); 900} 901 902INTERCEPTOR(int, sigaction, int signo, const __sanitizer_sigaction *act, 903 __sanitizer_sigaction *oldact) { 904 ENSURE_MSAN_INITED(); 905 // FIXME: check that *act is unpoisoned. 906 // That requires intercepting all of sigemptyset, sigfillset, etc. 907 int res; 908 if (flags()->wrap_signals) { 909 SpinMutexLock lock(&sigactions_mu); 910 CHECK_LT(signo, kMaxSignals); 911 uptr old_cb = sigactions[signo]; 912 __sanitizer_sigaction new_act; 913 __sanitizer_sigaction *pnew_act = act ? &new_act : 0; 914 if (act) { 915 internal_memcpy(pnew_act, act, __sanitizer::struct_sigaction_sz); 916 uptr cb = __sanitizer::__sanitizer_get_sigaction_sa_sigaction(pnew_act); 917 uptr new_cb = 918 __sanitizer::__sanitizer_get_sigaction_sa_siginfo(pnew_act) ? 919 (uptr)SignalAction : (uptr)SignalHandler; 920 if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) { 921 sigactions[signo] = cb; 922 __sanitizer::__sanitizer_set_sigaction_sa_sigaction(pnew_act, new_cb); 923 } 924 } 925 res = REAL(sigaction)(signo, pnew_act, oldact); 926 if (res == 0 && oldact) { 927 uptr cb = __sanitizer::__sanitizer_get_sigaction_sa_sigaction(oldact); 928 if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) { 929 __sanitizer::__sanitizer_set_sigaction_sa_sigaction(oldact, old_cb); 930 } 931 } 932 } else { 933 res = REAL(sigaction)(signo, act, oldact); 934 } 935 936 if (res == 0 && oldact) { 937 __msan_unpoison(oldact, __sanitizer::struct_sigaction_sz); 938 } 939 return res; 940} 941 942INTERCEPTOR(int, signal, int signo, uptr cb) { 943 ENSURE_MSAN_INITED(); 944 if (flags()->wrap_signals) { 945 CHECK_LT(signo, kMaxSignals); 946 SpinMutexLock lock(&sigactions_mu); 947 if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) { 948 sigactions[signo] = cb; 949 cb = (uptr) SignalHandler; 950 } 951 return REAL(signal)(signo, cb); 952 } else { 953 return REAL(signal)(signo, cb); 954 } 955} 956 957extern "C" int pthread_attr_init(void *attr); 958extern "C" int pthread_attr_destroy(void *attr); 959extern "C" int pthread_attr_setstacksize(void *attr, uptr stacksize); 960extern "C" int pthread_attr_getstack(void *attr, uptr *stack, uptr *stacksize); 961 962INTERCEPTOR(int, pthread_create, void *th, void *attr, void *(*callback)(void*), 963 void * param) { 964 ENSURE_MSAN_INITED(); // for GetTlsSize() 965 __sanitizer_pthread_attr_t myattr; 966 if (attr == 0) { 967 pthread_attr_init(&myattr); 968 attr = &myattr; 969 } 970 971 AdjustStackSizeLinux(attr, flags()->verbosity); 972 973 int res = REAL(pthread_create)(th, attr, callback, param); 974 if (attr == &myattr) 975 pthread_attr_destroy(&myattr); 976 if (!res) { 977 __msan_unpoison(th, __sanitizer::pthread_t_sz); 978 } 979 return res; 980} 981 982struct MSanInterceptorContext { 983 bool in_interceptor_scope; 984}; 985 986// A version of CHECK_UNPOISED using a saved scope value. Used in common 987// interceptors. 988#define CHECK_UNPOISONED_CTX(ctx, x, n) \ 989 do { \ 990 if (!((MSanInterceptorContext *)ctx)->in_interceptor_scope) \ 991 CHECK_UNPOISONED_0(x, n); \ 992 } while (0) 993 994#define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \ 995 __msan_unpoison(ptr, size) 996#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) \ 997 CHECK_UNPOISONED_CTX(ctx, ptr, size) 998#define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \ 999 if (msan_init_is_running) return REAL(func)(__VA_ARGS__); \ 1000 MSanInterceptorContext msan_ctx = {IsInInterceptorScope()}; \ 1001 ctx = (void *)&msan_ctx; \ 1002 InterceptorScope interceptor_scope; \ 1003 ENSURE_MSAN_INITED(); 1004#define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) \ 1005 do { \ 1006 } while (false) 1007#define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd) \ 1008 do { \ 1009 } while (false) 1010#define COMMON_INTERCEPTOR_FD_SOCKET_ACCEPT(ctx, fd, newfd) \ 1011 do { \ 1012 } while (false) 1013#define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name) \ 1014 do { \ 1015 } while (false) // FIXME 1016#include "sanitizer_common/sanitizer_common_interceptors.inc" 1017 1018#define COMMON_SYSCALL_PRE_READ_RANGE(p, s) CHECK_UNPOISONED(p, s) 1019#define COMMON_SYSCALL_PRE_WRITE_RANGE(p, s) 1020#define COMMON_SYSCALL_POST_READ_RANGE(p, s) 1021#define COMMON_SYSCALL_POST_WRITE_RANGE(p, s) __msan_unpoison(p, s) 1022#include "sanitizer_common/sanitizer_common_syscalls.inc" 1023 1024// static 1025void *fast_memset(void *ptr, int c, SIZE_T n) { 1026 // hack until we have a really fast internal_memset 1027 if (sizeof(uptr) == 8 && 1028 (n % 8) == 0 && 1029 ((uptr)ptr % 8) == 0 && 1030 (c == 0 || c == -1)) { 1031 // Printf("memset %p %zd %x\n", ptr, n, c); 1032 uptr to_store = c ? -1L : 0L; 1033 uptr *p = (uptr*)ptr; 1034 for (SIZE_T i = 0; i < n / 8; i++) 1035 p[i] = to_store; 1036 return ptr; 1037 } 1038 return internal_memset(ptr, c, n); 1039} 1040 1041// static 1042void *fast_memcpy(void *dst, const void *src, SIZE_T n) { 1043 // Same hack as in fast_memset above. 1044 if (sizeof(uptr) == 8 && 1045 (n % 8) == 0 && 1046 ((uptr)dst % 8) == 0 && 1047 ((uptr)src % 8) == 0) { 1048 uptr *d = (uptr*)dst; 1049 uptr *s = (uptr*)src; 1050 for (SIZE_T i = 0; i < n / 8; i++) 1051 d[i] = s[i]; 1052 return dst; 1053 } 1054 return internal_memcpy(dst, src, n); 1055} 1056 1057// These interface functions reside here so that they can use 1058// fast_memset, etc. 1059void __msan_unpoison(const void *a, uptr size) { 1060 if (!MEM_IS_APP(a)) return; 1061 fast_memset((void*)MEM_TO_SHADOW((uptr)a), 0, size); 1062} 1063 1064void __msan_poison(const void *a, uptr size) { 1065 if (!MEM_IS_APP(a)) return; 1066 fast_memset((void*)MEM_TO_SHADOW((uptr)a), 1067 __msan::flags()->poison_heap_with_zeroes ? 0 : -1, size); 1068} 1069 1070void __msan_poison_stack(void *a, uptr size) { 1071 if (!MEM_IS_APP(a)) return; 1072 fast_memset((void*)MEM_TO_SHADOW((uptr)a), 1073 __msan::flags()->poison_stack_with_zeroes ? 0 : -1, size); 1074} 1075 1076void __msan_clear_and_unpoison(void *a, uptr size) { 1077 fast_memset(a, 0, size); 1078 fast_memset((void*)MEM_TO_SHADOW((uptr)a), 0, size); 1079} 1080 1081void __msan_copy_origin(void *dst, const void *src, uptr size) { 1082 if (!__msan_get_track_origins()) return; 1083 if (!MEM_IS_APP(dst) || !MEM_IS_APP(src)) return; 1084 uptr d = MEM_TO_ORIGIN(dst); 1085 uptr s = MEM_TO_ORIGIN(src); 1086 uptr beg = d & ~3UL; // align down. 1087 uptr end = (d + size + 3) & ~3UL; // align up. 1088 s = s & ~3UL; // align down. 1089 fast_memcpy((void*)beg, (void*)s, end - beg); 1090} 1091 1092void __msan_copy_poison(void *dst, const void *src, uptr size) { 1093 if (!MEM_IS_APP(dst)) return; 1094 if (!MEM_IS_APP(src)) return; 1095 fast_memcpy((void*)MEM_TO_SHADOW((uptr)dst), 1096 (void*)MEM_TO_SHADOW((uptr)src), size); 1097 __msan_copy_origin(dst, src, size); 1098} 1099 1100void __msan_move_poison(void *dst, const void *src, uptr size) { 1101 if (!MEM_IS_APP(dst)) return; 1102 if (!MEM_IS_APP(src)) return; 1103 internal_memmove((void*)MEM_TO_SHADOW((uptr)dst), 1104 (void*)MEM_TO_SHADOW((uptr)src), size); 1105 __msan_copy_origin(dst, src, size); 1106} 1107 1108void *__msan_memcpy(void *dest, const void *src, SIZE_T n) { 1109 ENSURE_MSAN_INITED(); 1110 void *res = fast_memcpy(dest, src, n); 1111 __msan_copy_poison(dest, src, n); 1112 return res; 1113} 1114 1115void *__msan_memset(void *s, int c, SIZE_T n) { 1116 ENSURE_MSAN_INITED(); 1117 void *res = fast_memset(s, c, n); 1118 __msan_unpoison(s, n); 1119 return res; 1120} 1121 1122void *__msan_memmove(void *dest, const void *src, SIZE_T n) { 1123 ENSURE_MSAN_INITED(); 1124 void *res = REAL(memmove)(dest, src, n); 1125 __msan_move_poison(dest, src, n); 1126 return res; 1127} 1128 1129namespace __msan { 1130void InitializeInterceptors() { 1131 static int inited = 0; 1132 CHECK_EQ(inited, 0); 1133 SANITIZER_COMMON_INTERCEPTORS_INIT; 1134 1135 INTERCEPT_FUNCTION(mmap); 1136 INTERCEPT_FUNCTION(mmap64); 1137 INTERCEPT_FUNCTION(posix_memalign); 1138 INTERCEPT_FUNCTION(malloc); 1139 INTERCEPT_FUNCTION(calloc); 1140 INTERCEPT_FUNCTION(realloc); 1141 INTERCEPT_FUNCTION(free); 1142 INTERCEPT_FUNCTION(fread); 1143 INTERCEPT_FUNCTION(fread_unlocked); 1144 INTERCEPT_FUNCTION(readlink); 1145 INTERCEPT_FUNCTION(memcpy); 1146 INTERCEPT_FUNCTION(memset); 1147 INTERCEPT_FUNCTION(memmove); 1148 INTERCEPT_FUNCTION(wmemset); 1149 INTERCEPT_FUNCTION(wmemcpy); 1150 INTERCEPT_FUNCTION(wmemmove); 1151 INTERCEPT_FUNCTION(strcpy); // NOLINT 1152 INTERCEPT_FUNCTION(stpcpy); // NOLINT 1153 INTERCEPT_FUNCTION(strdup); 1154 INTERCEPT_FUNCTION(__strdup); 1155 INTERCEPT_FUNCTION(strndup); 1156 INTERCEPT_FUNCTION(__strndup); 1157 INTERCEPT_FUNCTION(strncpy); // NOLINT 1158 INTERCEPT_FUNCTION(strlen); 1159 INTERCEPT_FUNCTION(strnlen); 1160 INTERCEPT_FUNCTION(gcvt); 1161 INTERCEPT_FUNCTION(strcat); // NOLINT 1162 INTERCEPT_FUNCTION(strncat); // NOLINT 1163 INTERCEPT_FUNCTION(strtol); 1164 INTERCEPT_FUNCTION(strtoll); 1165 INTERCEPT_FUNCTION(strtoul); 1166 INTERCEPT_FUNCTION(strtoull); 1167 INTERCEPT_FUNCTION(strtod); 1168 INTERCEPT_FUNCTION(strtof); 1169 INTERCEPT_FUNCTION(strtold); 1170 INTERCEPT_FUNCTION(vasprintf); 1171 INTERCEPT_FUNCTION(asprintf); 1172 INTERCEPT_FUNCTION(vsprintf); 1173 INTERCEPT_FUNCTION(vsnprintf); 1174 INTERCEPT_FUNCTION(vswprintf); 1175 INTERCEPT_FUNCTION(sprintf); // NOLINT 1176 INTERCEPT_FUNCTION(snprintf); 1177 INTERCEPT_FUNCTION(swprintf); 1178 INTERCEPT_FUNCTION(strftime); 1179 INTERCEPT_FUNCTION(wcstombs); 1180 INTERCEPT_FUNCTION(mbstowcs); 1181 INTERCEPT_FUNCTION(mbtowc); 1182 INTERCEPT_FUNCTION(mbrtowc); 1183 INTERCEPT_FUNCTION(wcslen); 1184 INTERCEPT_FUNCTION(wcschr); 1185 INTERCEPT_FUNCTION(wcscpy); 1186 INTERCEPT_FUNCTION(wcscmp); 1187 INTERCEPT_FUNCTION(wcstod); 1188 INTERCEPT_FUNCTION(getenv); 1189 INTERCEPT_FUNCTION(gettimeofday); 1190 INTERCEPT_FUNCTION(fcvt); 1191 INTERCEPT_FUNCTION(__fxstat); 1192 INTERCEPT_FUNCTION(__xstat); 1193 INTERCEPT_FUNCTION(__lxstat); 1194 INTERCEPT_FUNCTION(__fxstat64); 1195 INTERCEPT_FUNCTION(__xstat64); 1196 INTERCEPT_FUNCTION(__lxstat64); 1197 INTERCEPT_FUNCTION(pipe); 1198 INTERCEPT_FUNCTION(pipe2); 1199 INTERCEPT_FUNCTION(socketpair); 1200 INTERCEPT_FUNCTION(fgets); 1201 INTERCEPT_FUNCTION(fgets_unlocked); 1202 INTERCEPT_FUNCTION(realpath); 1203 INTERCEPT_FUNCTION(getrlimit); 1204 INTERCEPT_FUNCTION(getrlimit64); 1205 INTERCEPT_FUNCTION(statfs); 1206 INTERCEPT_FUNCTION(fstatfs); 1207 INTERCEPT_FUNCTION(statfs64); 1208 INTERCEPT_FUNCTION(fstatfs64); 1209 INTERCEPT_FUNCTION(uname); 1210 INTERCEPT_FUNCTION(gethostname); 1211 INTERCEPT_FUNCTION(epoll_wait); 1212 INTERCEPT_FUNCTION(epoll_pwait); 1213 INTERCEPT_FUNCTION(recv); 1214 INTERCEPT_FUNCTION(recvfrom); 1215 INTERCEPT_FUNCTION(dladdr); 1216 INTERCEPT_FUNCTION(dlopen); 1217 INTERCEPT_FUNCTION(dl_iterate_phdr); 1218 INTERCEPT_FUNCTION(getrusage); 1219 INTERCEPT_FUNCTION(sigaction); 1220 INTERCEPT_FUNCTION(signal); 1221 INTERCEPT_FUNCTION(pthread_create); 1222 inited = 1; 1223} 1224} // namespace __msan 1225