msan_interceptors.cc revision 3fa122e6a8e12db6583793861f6cf776fe1c98a0
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 *, mempcpy, void *dest, const void *src, SIZE_T n) { 111 return (char *)__msan_memcpy(dest, src, n) + n; 112} 113 114INTERCEPTOR(void *, memmove, void *dest, const void *src, SIZE_T n) { 115 return __msan_memmove(dest, src, n); 116} 117 118INTERCEPTOR(void *, memset, void *s, int c, SIZE_T n) { 119 return __msan_memset(s, c, n); 120} 121 122INTERCEPTOR(void *, bcopy, const void *src, void *dest, SIZE_T n) { 123 return __msan_memmove(dest, src, n); 124} 125 126INTERCEPTOR(int, posix_memalign, void **memptr, SIZE_T alignment, SIZE_T size) { 127 GET_MALLOC_STACK_TRACE; 128 CHECK_EQ(alignment & (alignment - 1), 0); 129 CHECK_NE(memptr, 0); 130 *memptr = MsanReallocate(&stack, 0, size, alignment, false); 131 CHECK_NE(*memptr, 0); 132 __msan_unpoison(memptr, sizeof(*memptr)); 133 return 0; 134} 135 136INTERCEPTOR(void, free, void *ptr) { 137 ENSURE_MSAN_INITED(); 138 if (ptr == 0) return; 139 MsanDeallocate(ptr); 140} 141 142INTERCEPTOR(SIZE_T, strlen, const char *s) { 143 ENSURE_MSAN_INITED(); 144 SIZE_T res = REAL(strlen)(s); 145 CHECK_UNPOISONED(s, res + 1); 146 return res; 147} 148 149INTERCEPTOR(SIZE_T, strnlen, const char *s, SIZE_T n) { 150 ENSURE_MSAN_INITED(); 151 SIZE_T res = REAL(strnlen)(s, n); 152 SIZE_T scan_size = (res == n) ? res : res + 1; 153 CHECK_UNPOISONED(s, scan_size); 154 return res; 155} 156 157// FIXME: Add stricter shadow checks in str* interceptors (ex.: strcpy should 158// check the shadow of the terminating \0 byte). 159 160INTERCEPTOR(char *, strcpy, char *dest, const char *src) { // NOLINT 161 ENSURE_MSAN_INITED(); 162 SIZE_T n = REAL(strlen)(src); 163 char *res = REAL(strcpy)(dest, src); // NOLINT 164 __msan_copy_poison(dest, src, n + 1); 165 return res; 166} 167 168INTERCEPTOR(char *, strncpy, char *dest, const char *src, SIZE_T n) { // NOLINT 169 ENSURE_MSAN_INITED(); 170 SIZE_T copy_size = REAL(strnlen)(src, n); 171 if (copy_size < n) 172 copy_size++; // trailing \0 173 char *res = REAL(strncpy)(dest, src, n); // NOLINT 174 __msan_copy_poison(dest, src, copy_size); 175 return res; 176} 177 178INTERCEPTOR(char *, stpcpy, char *dest, const char *src) { // NOLINT 179 ENSURE_MSAN_INITED(); 180 SIZE_T n = REAL(strlen)(src); 181 char *res = REAL(stpcpy)(dest, src); // NOLINT 182 __msan_copy_poison(dest, 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 *, __strdup, char *src) { 195 ENSURE_MSAN_INITED(); 196 SIZE_T n = REAL(strlen)(src); 197 char *res = REAL(__strdup)(src); 198 __msan_copy_poison(res, src, n + 1); 199 return res; 200} 201 202INTERCEPTOR(char *, strndup, char *src, SIZE_T n) { 203 ENSURE_MSAN_INITED(); 204 SIZE_T copy_size = REAL(strnlen)(src, n); 205 char *res = REAL(strndup)(src, n); 206 __msan_copy_poison(res, src, copy_size); 207 __msan_unpoison(res + copy_size, 1); // \0 208 return res; 209} 210 211INTERCEPTOR(char *, __strndup, char *src, SIZE_T n) { 212 ENSURE_MSAN_INITED(); 213 SIZE_T copy_size = REAL(strnlen)(src, n); 214 char *res = REAL(__strndup)(src, n); 215 __msan_copy_poison(res, src, copy_size); 216 __msan_unpoison(res + copy_size, 1); // \0 217 return res; 218} 219 220INTERCEPTOR(char *, gcvt, double number, SIZE_T ndigit, char *buf) { 221 ENSURE_MSAN_INITED(); 222 char *res = REAL(gcvt)(number, ndigit, buf); 223 // DynamoRio tool will take care of unpoisoning gcvt result for us. 224 if (!__msan_has_dynamic_component()) { 225 SIZE_T n = REAL(strlen)(buf); 226 __msan_unpoison(buf, n + 1); 227 } 228 return res; 229} 230 231INTERCEPTOR(char *, strcat, char *dest, const char *src) { // NOLINT 232 ENSURE_MSAN_INITED(); 233 SIZE_T src_size = REAL(strlen)(src); 234 SIZE_T dest_size = REAL(strlen)(dest); 235 char *res = REAL(strcat)(dest, src); // NOLINT 236 __msan_copy_poison(dest + dest_size, src, src_size + 1); 237 return res; 238} 239 240INTERCEPTOR(char *, strncat, char *dest, const char *src, SIZE_T n) { // NOLINT 241 ENSURE_MSAN_INITED(); 242 SIZE_T dest_size = REAL(strlen)(dest); 243 SIZE_T copy_size = REAL(strlen)(src); 244 if (copy_size < n) 245 copy_size++; // trailing \0 246 char *res = REAL(strncat)(dest, src, n); // NOLINT 247 __msan_copy_poison(dest + dest_size, src, copy_size); 248 return res; 249} 250 251INTERCEPTOR(long, strtol, const char *nptr, char **endptr, // NOLINT 252 int base) { 253 ENSURE_MSAN_INITED(); 254 long res = REAL(strtol)(nptr, endptr, base); // NOLINT 255 if (!__msan_has_dynamic_component()) { 256 __msan_unpoison(endptr, sizeof(*endptr)); 257 } 258 return res; 259} 260 261INTERCEPTOR(long long, strtoll, const char *nptr, char **endptr, // NOLINT 262 int base) { 263 ENSURE_MSAN_INITED(); 264 long res = REAL(strtoll)(nptr, endptr, base); //NOLINT 265 if (!__msan_has_dynamic_component()) { 266 __msan_unpoison(endptr, sizeof(*endptr)); 267 } 268 return res; 269} 270 271INTERCEPTOR(unsigned long, strtoul, const char *nptr, char **endptr, // NOLINT 272 int base) { 273 ENSURE_MSAN_INITED(); 274 unsigned long res = REAL(strtoul)(nptr, endptr, base); // NOLINT 275 if (!__msan_has_dynamic_component()) { 276 __msan_unpoison(endptr, sizeof(*endptr)); 277 } 278 return res; 279} 280 281INTERCEPTOR(unsigned long long, strtoull, const char *nptr, // NOLINT 282 char **endptr, int base) { 283 ENSURE_MSAN_INITED(); 284 unsigned long res = REAL(strtoull)(nptr, endptr, base); // NOLINT 285 if (!__msan_has_dynamic_component()) { 286 __msan_unpoison(endptr, sizeof(*endptr)); 287 } 288 return res; 289} 290 291INTERCEPTOR(double, strtod, const char *nptr, char **endptr) { // NOLINT 292 ENSURE_MSAN_INITED(); 293 double res = REAL(strtod)(nptr, endptr); // NOLINT 294 if (!__msan_has_dynamic_component()) { 295 __msan_unpoison(endptr, sizeof(*endptr)); 296 } 297 return res; 298} 299 300INTERCEPTOR(float, strtof, const char *nptr, char **endptr) { // NOLINT 301 ENSURE_MSAN_INITED(); 302 float res = REAL(strtof)(nptr, endptr); // NOLINT 303 if (!__msan_has_dynamic_component()) { 304 __msan_unpoison(endptr, sizeof(*endptr)); 305 } 306 return res; 307} 308 309INTERCEPTOR(long double, strtold, const char *nptr, char **endptr) { // NOLINT 310 ENSURE_MSAN_INITED(); 311 long double res = REAL(strtold)(nptr, endptr); // NOLINT 312 if (!__msan_has_dynamic_component()) { 313 __msan_unpoison(endptr, sizeof(*endptr)); 314 } 315 return res; 316} 317 318INTERCEPTOR(int, vasprintf, char **strp, const char *format, va_list ap) { 319 ENSURE_MSAN_INITED(); 320 int res = REAL(vasprintf)(strp, format, ap); 321 if (res >= 0 && !__msan_has_dynamic_component()) { 322 __msan_unpoison(strp, sizeof(*strp)); 323 __msan_unpoison(*strp, res + 1); 324 } 325 return res; 326} 327 328INTERCEPTOR(int, asprintf, char **strp, const char *format, ...) { // NOLINT 329 ENSURE_MSAN_INITED(); 330 va_list ap; 331 va_start(ap, format); 332 int res = vasprintf(strp, format, ap); // NOLINT 333 va_end(ap); 334 return res; 335} 336 337INTERCEPTOR(int, vsnprintf, char *str, uptr size, 338 const char *format, va_list ap) { 339 ENSURE_MSAN_INITED(); 340 int res = REAL(vsnprintf)(str, size, format, ap); 341 if (res >= 0 && !__msan_has_dynamic_component()) { 342 __msan_unpoison(str, res + 1); 343 } 344 return res; 345} 346 347INTERCEPTOR(int, vsprintf, char *str, const char *format, va_list ap) { 348 ENSURE_MSAN_INITED(); 349 int res = REAL(vsprintf)(str, format, ap); 350 if (res >= 0 && !__msan_has_dynamic_component()) { 351 __msan_unpoison(str, res + 1); 352 } 353 return res; 354} 355 356INTERCEPTOR(int, vswprintf, void *str, uptr size, void *format, va_list ap) { 357 ENSURE_MSAN_INITED(); 358 int res = REAL(vswprintf)(str, size, format, ap); 359 if (res >= 0 && !__msan_has_dynamic_component()) { 360 __msan_unpoison(str, 4 * (res + 1)); 361 } 362 return res; 363} 364 365INTERCEPTOR(int, sprintf, char *str, const char *format, ...) { // NOLINT 366 ENSURE_MSAN_INITED(); 367 va_list ap; 368 va_start(ap, format); 369 int res = vsprintf(str, format, ap); // NOLINT 370 va_end(ap); 371 return res; 372} 373 374INTERCEPTOR(int, snprintf, char *str, uptr size, const char *format, ...) { 375 ENSURE_MSAN_INITED(); 376 va_list ap; 377 va_start(ap, format); 378 int res = vsnprintf(str, size, format, ap); 379 va_end(ap); 380 return res; 381} 382 383INTERCEPTOR(int, swprintf, void *str, uptr size, void *format, ...) { 384 ENSURE_MSAN_INITED(); 385 va_list ap; 386 va_start(ap, format); 387 int res = vswprintf(str, size, format, ap); 388 va_end(ap); 389 return res; 390} 391 392// SIZE_T strftime(char *s, SIZE_T max, const char *format,const struct tm *tm); 393INTERCEPTOR(SIZE_T, strftime, char *s, SIZE_T max, const char *format, 394 void *tm) { 395 ENSURE_MSAN_INITED(); 396 SIZE_T res = REAL(strftime)(s, max, format, tm); 397 if (res) __msan_unpoison(s, res + 1); 398 return res; 399} 400 401INTERCEPTOR(int, mbtowc, wchar_t *dest, const char *src, SIZE_T n) { 402 ENSURE_MSAN_INITED(); 403 int res = REAL(mbtowc)(dest, src, n); 404 if (res != -1 && dest) __msan_unpoison(dest, sizeof(wchar_t)); 405 return res; 406} 407 408INTERCEPTOR(int, mbrtowc, wchar_t *dest, const char *src, SIZE_T n, void *ps) { 409 ENSURE_MSAN_INITED(); 410 SIZE_T res = REAL(mbrtowc)(dest, src, n, ps); 411 if (res != (SIZE_T)-1 && dest) __msan_unpoison(dest, sizeof(wchar_t)); 412 return res; 413} 414 415INTERCEPTOR(SIZE_T, wcslen, const wchar_t *s) { 416 ENSURE_MSAN_INITED(); 417 SIZE_T res = REAL(wcslen)(s); 418 CHECK_UNPOISONED(s, sizeof(wchar_t) * (res + 1)); 419 return res; 420} 421 422// wchar_t *wcschr(const wchar_t *wcs, wchar_t wc); 423INTERCEPTOR(wchar_t *, wcschr, void *s, wchar_t wc, void *ps) { 424 ENSURE_MSAN_INITED(); 425 wchar_t *res = REAL(wcschr)(s, wc, ps); 426 return res; 427} 428 429// wchar_t *wcscpy(wchar_t *dest, const wchar_t *src); 430INTERCEPTOR(wchar_t *, wcscpy, wchar_t *dest, const wchar_t *src) { 431 ENSURE_MSAN_INITED(); 432 wchar_t *res = REAL(wcscpy)(dest, src); 433 __msan_copy_poison(dest, src, sizeof(wchar_t) * (REAL(wcslen)(src) + 1)); 434 return res; 435} 436 437// wchar_t *wmemcpy(wchar_t *dest, const wchar_t *src, SIZE_T n); 438INTERCEPTOR(wchar_t *, wmemcpy, wchar_t *dest, const wchar_t *src, SIZE_T n) { 439 ENSURE_MSAN_INITED(); 440 wchar_t *res = REAL(wmemcpy)(dest, src, n); 441 __msan_copy_poison(dest, src, n * sizeof(wchar_t)); 442 return res; 443} 444 445INTERCEPTOR(wchar_t *, wmempcpy, wchar_t *dest, const wchar_t *src, SIZE_T n) { 446 ENSURE_MSAN_INITED(); 447 wchar_t *res = REAL(wmempcpy)(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(int, getrlimit, int resource, void *rlim) { 623 if (msan_init_is_running) 624 return REAL(getrlimit)(resource, rlim); 625 ENSURE_MSAN_INITED(); 626 int res = REAL(getrlimit)(resource, rlim); 627 if (!res) 628 __msan_unpoison(rlim, __sanitizer::struct_rlimit_sz); 629 return res; 630} 631 632INTERCEPTOR(int, getrlimit64, int resource, void *rlim) { 633 if (msan_init_is_running) 634 return REAL(getrlimit64)(resource, rlim); 635 ENSURE_MSAN_INITED(); 636 int res = REAL(getrlimit64)(resource, rlim); 637 if (!res) 638 __msan_unpoison(rlim, __sanitizer::struct_rlimit64_sz); 639 return res; 640} 641 642INTERCEPTOR(int, statfs, const char *s, void *buf) { 643 ENSURE_MSAN_INITED(); 644 int res = REAL(statfs)(s, buf); 645 if (!res) 646 __msan_unpoison(buf, __sanitizer::struct_statfs_sz); 647 return res; 648} 649 650INTERCEPTOR(int, fstatfs, int fd, void *buf) { 651 ENSURE_MSAN_INITED(); 652 int res = REAL(fstatfs)(fd, buf); 653 if (!res) 654 __msan_unpoison(buf, __sanitizer::struct_statfs_sz); 655 return res; 656} 657 658INTERCEPTOR(int, statfs64, const char *s, void *buf) { 659 ENSURE_MSAN_INITED(); 660 int res = REAL(statfs64)(s, buf); 661 if (!res) 662 __msan_unpoison(buf, __sanitizer::struct_statfs64_sz); 663 return res; 664} 665 666INTERCEPTOR(int, fstatfs64, int fd, void *buf) { 667 ENSURE_MSAN_INITED(); 668 int res = REAL(fstatfs64)(fd, buf); 669 if (!res) 670 __msan_unpoison(buf, __sanitizer::struct_statfs64_sz); 671 return res; 672} 673 674INTERCEPTOR(int, uname, void *utsname) { 675 ENSURE_MSAN_INITED(); 676 int res = REAL(uname)(utsname); 677 if (!res) { 678 __msan_unpoison(utsname, __sanitizer::struct_utsname_sz); 679 } 680 return res; 681} 682 683INTERCEPTOR(int, gethostname, char *name, SIZE_T len) { 684 ENSURE_MSAN_INITED(); 685 int res = REAL(gethostname)(name, len); 686 if (!res) { 687 SIZE_T real_len = REAL(strnlen)(name, len); 688 if (real_len < len) 689 ++real_len; 690 __msan_unpoison(name, real_len); 691 } 692 return res; 693} 694 695INTERCEPTOR(int, epoll_wait, int epfd, void *events, int maxevents, 696 int timeout) { 697 ENSURE_MSAN_INITED(); 698 int res = REAL(epoll_wait)(epfd, events, maxevents, timeout); 699 if (res > 0) { 700 __msan_unpoison(events, __sanitizer::struct_epoll_event_sz * res); 701 } 702 return res; 703} 704 705INTERCEPTOR(int, epoll_pwait, int epfd, void *events, int maxevents, 706 int timeout, void *sigmask) { 707 ENSURE_MSAN_INITED(); 708 int res = REAL(epoll_pwait)(epfd, events, maxevents, timeout, sigmask); 709 if (res > 0) { 710 __msan_unpoison(events, __sanitizer::struct_epoll_event_sz * res); 711 } 712 return res; 713} 714 715INTERCEPTOR(SSIZE_T, recv, int fd, void *buf, SIZE_T len, int flags) { 716 ENSURE_MSAN_INITED(); 717 SSIZE_T res = REAL(recv)(fd, buf, len, flags); 718 if (res > 0) 719 __msan_unpoison(buf, res); 720 return res; 721} 722 723INTERCEPTOR(SSIZE_T, recvfrom, int fd, void *buf, SIZE_T len, int flags, 724 void *srcaddr, int *addrlen) { 725 ENSURE_MSAN_INITED(); 726 SIZE_T srcaddr_sz; 727 if (srcaddr) srcaddr_sz = *addrlen; 728 SSIZE_T res = REAL(recvfrom)(fd, buf, len, flags, srcaddr, addrlen); 729 if (res > 0) { 730 __msan_unpoison(buf, res); 731 if (srcaddr) { 732 SIZE_T sz = *addrlen; 733 __msan_unpoison(srcaddr, (sz < srcaddr_sz) ? sz : srcaddr_sz); 734 } 735 } 736 return res; 737} 738 739INTERCEPTOR(void *, calloc, SIZE_T nmemb, SIZE_T size) { 740 if (CallocShouldReturnNullDueToOverflow(size, nmemb)) return 0; 741 GET_MALLOC_STACK_TRACE; 742 if (!msan_inited) { 743 // Hack: dlsym calls calloc before REAL(calloc) is retrieved from dlsym. 744 const SIZE_T kCallocPoolSize = 1024; 745 static uptr calloc_memory_for_dlsym[kCallocPoolSize]; 746 static SIZE_T allocated; 747 SIZE_T size_in_words = ((nmemb * size) + kWordSize - 1) / kWordSize; 748 void *mem = (void*)&calloc_memory_for_dlsym[allocated]; 749 allocated += size_in_words; 750 CHECK(allocated < kCallocPoolSize); 751 return mem; 752 } 753 return MsanReallocate(&stack, 0, nmemb * size, sizeof(u64), true); 754} 755 756INTERCEPTOR(void *, realloc, void *ptr, SIZE_T size) { 757 GET_MALLOC_STACK_TRACE; 758 return MsanReallocate(&stack, ptr, size, sizeof(u64), false); 759} 760 761INTERCEPTOR(void *, malloc, SIZE_T size) { 762 GET_MALLOC_STACK_TRACE; 763 return MsanReallocate(&stack, 0, size, sizeof(u64), false); 764} 765 766void __msan_allocated_memory(const void* data, uptr size) { 767 GET_MALLOC_STACK_TRACE; 768 if (flags()->poison_in_malloc) 769 __msan_poison(data, size); 770 if (__msan_get_track_origins()) { 771 u32 stack_id = StackDepotPut(stack.trace, stack.size); 772 CHECK(stack_id); 773 CHECK_EQ((stack_id >> 31), 0); // Higher bit is occupied by stack origins. 774 __msan_set_origin(data, size, stack_id); 775 } 776} 777 778INTERCEPTOR(void *, mmap, void *addr, SIZE_T length, int prot, int flags, 779 int fd, OFF_T offset) { 780 ENSURE_MSAN_INITED(); 781 void *res = REAL(mmap)(addr, length, prot, flags, fd, offset); 782 if (res != (void*)-1) 783 __msan_unpoison(res, RoundUpTo(length, GetPageSize())); 784 return res; 785} 786 787INTERCEPTOR(void *, mmap64, void *addr, SIZE_T length, int prot, int flags, 788 int fd, OFF64_T offset) { 789 ENSURE_MSAN_INITED(); 790 void *res = REAL(mmap64)(addr, length, prot, flags, fd, offset); 791 if (res != (void*)-1) 792 __msan_unpoison(res, RoundUpTo(length, GetPageSize())); 793 return res; 794} 795 796struct dlinfo { 797 char *dli_fname; 798 void *dli_fbase; 799 char *dli_sname; 800 void *dli_saddr; 801}; 802 803INTERCEPTOR(int, dladdr, void *addr, dlinfo *info) { 804 ENSURE_MSAN_INITED(); 805 int res = REAL(dladdr)(addr, info); 806 if (res != 0) { 807 __msan_unpoison(info, sizeof(*info)); 808 if (info->dli_fname) 809 __msan_unpoison(info->dli_fname, REAL(strlen)(info->dli_fname) + 1); 810 if (info->dli_sname) 811 __msan_unpoison(info->dli_sname, REAL(strlen)(info->dli_sname) + 1); 812 } 813 return res; 814} 815 816// dlopen() ultimately calls mmap() down inside the loader, which generally 817// doesn't participate in dynamic symbol resolution. Therefore we won't 818// intercept its calls to mmap, and we have to hook it here. The loader 819// initializes the module before returning, so without the dynamic component, we 820// won't be able to clear the shadow before the initializers. Fixing this would 821// require putting our own initializer first to clear the shadow. 822INTERCEPTOR(void *, dlopen, const char *filename, int flag) { 823 ENSURE_MSAN_INITED(); 824 EnterLoader(); 825 link_map *map = (link_map *)REAL(dlopen)(filename, flag); 826 ExitLoader(); 827 if (!__msan_has_dynamic_component() && map) { 828 // If msandr didn't clear the shadow before the initializers ran, we do it 829 // ourselves afterwards. 830 UnpoisonMappedDSO(map); 831 } 832 return (void *)map; 833} 834 835typedef int (*dl_iterate_phdr_cb)(__sanitizer_dl_phdr_info *info, SIZE_T size, 836 void *data); 837struct dl_iterate_phdr_data { 838 dl_iterate_phdr_cb callback; 839 void *data; 840}; 841 842static int msan_dl_iterate_phdr_cb(__sanitizer_dl_phdr_info *info, SIZE_T size, 843 void *data) { 844 if (info) { 845 __msan_unpoison(info, size); 846 if (info->dlpi_name) 847 __msan_unpoison(info->dlpi_name, REAL(strlen)(info->dlpi_name) + 1); 848 } 849 dl_iterate_phdr_data *cbdata = (dl_iterate_phdr_data *)data; 850 UnpoisonParam(3); 851 return cbdata->callback(info, size, cbdata->data); 852} 853 854INTERCEPTOR(int, dl_iterate_phdr, dl_iterate_phdr_cb callback, void *data) { 855 ENSURE_MSAN_INITED(); 856 EnterLoader(); 857 dl_iterate_phdr_data cbdata; 858 cbdata.callback = callback; 859 cbdata.data = data; 860 int res = REAL(dl_iterate_phdr)(msan_dl_iterate_phdr_cb, (void *)&cbdata); 861 ExitLoader(); 862 return res; 863} 864 865INTERCEPTOR(int, getrusage, int who, void *usage) { 866 ENSURE_MSAN_INITED(); 867 int res = REAL(getrusage)(who, usage); 868 if (res == 0) { 869 __msan_unpoison(usage, __sanitizer::struct_rusage_sz); 870 } 871 return res; 872} 873 874const int kMaxSignals = 1024; 875static uptr sigactions[kMaxSignals]; 876static StaticSpinMutex sigactions_mu; 877 878static void SignalHandler(int signo) { 879 typedef void (*signal_cb)(int x); 880 signal_cb cb = (signal_cb)sigactions[signo]; 881 cb(signo); 882} 883 884static void SignalAction(int signo, void *si, void *uc) { 885 UnpoisonParam(3); 886 __msan_unpoison(si, __sanitizer::struct_sigaction_sz); 887 __msan_unpoison(uc, __sanitizer::ucontext_t_sz); 888 889 typedef void (*sigaction_cb)(int, void *, void *); 890 sigaction_cb cb = (sigaction_cb)sigactions[signo]; 891 cb(signo, si, uc); 892} 893 894INTERCEPTOR(int, sigaction, int signo, const __sanitizer_sigaction *act, 895 __sanitizer_sigaction *oldact) { 896 ENSURE_MSAN_INITED(); 897 // FIXME: check that *act is unpoisoned. 898 // That requires intercepting all of sigemptyset, sigfillset, etc. 899 int res; 900 if (flags()->wrap_signals) { 901 SpinMutexLock lock(&sigactions_mu); 902 CHECK_LT(signo, kMaxSignals); 903 uptr old_cb = sigactions[signo]; 904 __sanitizer_sigaction new_act; 905 __sanitizer_sigaction *pnew_act = act ? &new_act : 0; 906 if (act) { 907 internal_memcpy(pnew_act, act, __sanitizer::struct_sigaction_sz); 908 uptr cb = __sanitizer::__sanitizer_get_sigaction_sa_sigaction(pnew_act); 909 uptr new_cb = 910 __sanitizer::__sanitizer_get_sigaction_sa_siginfo(pnew_act) ? 911 (uptr)SignalAction : (uptr)SignalHandler; 912 if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) { 913 sigactions[signo] = cb; 914 __sanitizer::__sanitizer_set_sigaction_sa_sigaction(pnew_act, new_cb); 915 } 916 } 917 res = REAL(sigaction)(signo, pnew_act, oldact); 918 if (res == 0 && oldact) { 919 uptr cb = __sanitizer::__sanitizer_get_sigaction_sa_sigaction(oldact); 920 if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) { 921 __sanitizer::__sanitizer_set_sigaction_sa_sigaction(oldact, old_cb); 922 } 923 } 924 } else { 925 res = REAL(sigaction)(signo, act, oldact); 926 } 927 928 if (res == 0 && oldact) { 929 __msan_unpoison(oldact, __sanitizer::struct_sigaction_sz); 930 } 931 return res; 932} 933 934INTERCEPTOR(int, signal, int signo, uptr cb) { 935 ENSURE_MSAN_INITED(); 936 if (flags()->wrap_signals) { 937 CHECK_LT(signo, kMaxSignals); 938 SpinMutexLock lock(&sigactions_mu); 939 if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) { 940 sigactions[signo] = cb; 941 cb = (uptr) SignalHandler; 942 } 943 return REAL(signal)(signo, cb); 944 } else { 945 return REAL(signal)(signo, cb); 946 } 947} 948 949extern "C" int pthread_attr_init(void *attr); 950extern "C" int pthread_attr_destroy(void *attr); 951extern "C" int pthread_attr_setstacksize(void *attr, uptr stacksize); 952extern "C" int pthread_attr_getstack(void *attr, uptr *stack, uptr *stacksize); 953 954INTERCEPTOR(int, pthread_create, void *th, void *attr, void *(*callback)(void*), 955 void * param) { 956 ENSURE_MSAN_INITED(); // for GetTlsSize() 957 __sanitizer_pthread_attr_t myattr; 958 if (attr == 0) { 959 pthread_attr_init(&myattr); 960 attr = &myattr; 961 } 962 963 AdjustStackSizeLinux(attr, flags()->verbosity); 964 965 int res = REAL(pthread_create)(th, attr, callback, param); 966 if (attr == &myattr) 967 pthread_attr_destroy(&myattr); 968 if (!res) { 969 __msan_unpoison(th, __sanitizer::pthread_t_sz); 970 } 971 return res; 972} 973 974INTERCEPTOR(int, pthread_key_create, __sanitizer_pthread_key_t *key, void (*dtor) (void *)) { 975 ENSURE_MSAN_INITED(); 976 int res = REAL(pthread_key_create)(key, dtor); 977 if (!res && key) 978 __msan_unpoison(key, sizeof(*key)); 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_UNPOISON_PARAM(ctx, count) \ 995 UnpoisonParam(count) 996#define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \ 997 __msan_unpoison(ptr, size) 998#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) \ 999 CHECK_UNPOISONED_CTX(ctx, ptr, size) 1000#define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \ 1001 if (msan_init_is_running) return REAL(func)(__VA_ARGS__); \ 1002 MSanInterceptorContext msan_ctx = {IsInInterceptorScope()}; \ 1003 ctx = (void *)&msan_ctx; \ 1004 InterceptorScope interceptor_scope; \ 1005 ENSURE_MSAN_INITED(); 1006#define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) \ 1007 do { \ 1008 } while (false) 1009#define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd) \ 1010 do { \ 1011 } while (false) 1012#define COMMON_INTERCEPTOR_FD_SOCKET_ACCEPT(ctx, fd, newfd) \ 1013 do { \ 1014 } while (false) 1015#define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name) \ 1016 do { \ 1017 } while (false) // FIXME 1018#include "sanitizer_common/sanitizer_common_interceptors.inc" 1019 1020#define COMMON_SYSCALL_PRE_READ_RANGE(p, s) CHECK_UNPOISONED(p, s) 1021#define COMMON_SYSCALL_PRE_WRITE_RANGE(p, s) 1022#define COMMON_SYSCALL_POST_READ_RANGE(p, s) 1023#define COMMON_SYSCALL_POST_WRITE_RANGE(p, s) __msan_unpoison(p, s) 1024#include "sanitizer_common/sanitizer_common_syscalls.inc" 1025 1026// static 1027void *fast_memset(void *ptr, int c, SIZE_T n) { 1028 // hack until we have a really fast internal_memset 1029 if (sizeof(uptr) == 8 && 1030 (n % 8) == 0 && 1031 ((uptr)ptr % 8) == 0 && 1032 (c == 0 || c == -1)) { 1033 // Printf("memset %p %zd %x\n", ptr, n, c); 1034 uptr to_store = c ? -1L : 0L; 1035 uptr *p = (uptr*)ptr; 1036 for (SIZE_T i = 0; i < n / 8; i++) 1037 p[i] = to_store; 1038 return ptr; 1039 } 1040 return internal_memset(ptr, c, n); 1041} 1042 1043// static 1044void *fast_memcpy(void *dst, const void *src, SIZE_T n) { 1045 // Same hack as in fast_memset above. 1046 if (sizeof(uptr) == 8 && 1047 (n % 8) == 0 && 1048 ((uptr)dst % 8) == 0 && 1049 ((uptr)src % 8) == 0) { 1050 uptr *d = (uptr*)dst; 1051 uptr *s = (uptr*)src; 1052 for (SIZE_T i = 0; i < n / 8; i++) 1053 d[i] = s[i]; 1054 return dst; 1055 } 1056 return internal_memcpy(dst, src, n); 1057} 1058 1059// These interface functions reside here so that they can use 1060// fast_memset, etc. 1061void __msan_unpoison(const void *a, uptr size) { 1062 if (!MEM_IS_APP(a)) return; 1063 fast_memset((void*)MEM_TO_SHADOW((uptr)a), 0, size); 1064} 1065 1066void __msan_poison(const void *a, uptr size) { 1067 if (!MEM_IS_APP(a)) return; 1068 fast_memset((void*)MEM_TO_SHADOW((uptr)a), 1069 __msan::flags()->poison_heap_with_zeroes ? 0 : -1, size); 1070} 1071 1072void __msan_poison_stack(void *a, uptr size) { 1073 if (!MEM_IS_APP(a)) return; 1074 fast_memset((void*)MEM_TO_SHADOW((uptr)a), 1075 __msan::flags()->poison_stack_with_zeroes ? 0 : -1, size); 1076} 1077 1078void __msan_clear_and_unpoison(void *a, uptr size) { 1079 fast_memset(a, 0, size); 1080 fast_memset((void*)MEM_TO_SHADOW((uptr)a), 0, size); 1081} 1082 1083void __msan_copy_origin(void *dst, const void *src, uptr size) { 1084 if (!__msan_get_track_origins()) return; 1085 if (!MEM_IS_APP(dst) || !MEM_IS_APP(src)) return; 1086 uptr d = MEM_TO_ORIGIN(dst); 1087 uptr s = MEM_TO_ORIGIN(src); 1088 uptr beg = d & ~3UL; // align down. 1089 uptr end = (d + size + 3) & ~3UL; // align up. 1090 s = s & ~3UL; // align down. 1091 fast_memcpy((void*)beg, (void*)s, end - beg); 1092} 1093 1094void __msan_copy_poison(void *dst, const void *src, uptr size) { 1095 if (!MEM_IS_APP(dst)) return; 1096 if (!MEM_IS_APP(src)) return; 1097 fast_memcpy((void*)MEM_TO_SHADOW((uptr)dst), 1098 (void*)MEM_TO_SHADOW((uptr)src), size); 1099 __msan_copy_origin(dst, src, size); 1100} 1101 1102void __msan_move_poison(void *dst, const void *src, uptr size) { 1103 if (!MEM_IS_APP(dst)) return; 1104 if (!MEM_IS_APP(src)) return; 1105 internal_memmove((void*)MEM_TO_SHADOW((uptr)dst), 1106 (void*)MEM_TO_SHADOW((uptr)src), size); 1107 __msan_copy_origin(dst, src, size); 1108} 1109 1110void *__msan_memcpy(void *dest, const void *src, SIZE_T n) { 1111 ENSURE_MSAN_INITED(); 1112 void *res = fast_memcpy(dest, src, n); 1113 __msan_copy_poison(dest, src, n); 1114 return res; 1115} 1116 1117void *__msan_memset(void *s, int c, SIZE_T n) { 1118 ENSURE_MSAN_INITED(); 1119 void *res = fast_memset(s, c, n); 1120 __msan_unpoison(s, n); 1121 return res; 1122} 1123 1124void *__msan_memmove(void *dest, const void *src, SIZE_T n) { 1125 ENSURE_MSAN_INITED(); 1126 void *res = REAL(memmove)(dest, src, n); 1127 __msan_move_poison(dest, src, n); 1128 return res; 1129} 1130 1131namespace __msan { 1132void InitializeInterceptors() { 1133 static int inited = 0; 1134 CHECK_EQ(inited, 0); 1135 SANITIZER_COMMON_INTERCEPTORS_INIT; 1136 1137 INTERCEPT_FUNCTION(mmap); 1138 INTERCEPT_FUNCTION(mmap64); 1139 INTERCEPT_FUNCTION(posix_memalign); 1140 INTERCEPT_FUNCTION(malloc); 1141 INTERCEPT_FUNCTION(calloc); 1142 INTERCEPT_FUNCTION(realloc); 1143 INTERCEPT_FUNCTION(free); 1144 INTERCEPT_FUNCTION(fread); 1145 INTERCEPT_FUNCTION(fread_unlocked); 1146 INTERCEPT_FUNCTION(readlink); 1147 INTERCEPT_FUNCTION(memcpy); 1148 INTERCEPT_FUNCTION(mempcpy); 1149 INTERCEPT_FUNCTION(memset); 1150 INTERCEPT_FUNCTION(memmove); 1151 INTERCEPT_FUNCTION(bcopy); 1152 INTERCEPT_FUNCTION(wmemset); 1153 INTERCEPT_FUNCTION(wmemcpy); 1154 INTERCEPT_FUNCTION(wmempcpy); 1155 INTERCEPT_FUNCTION(wmemmove); 1156 INTERCEPT_FUNCTION(strcpy); // NOLINT 1157 INTERCEPT_FUNCTION(stpcpy); // NOLINT 1158 INTERCEPT_FUNCTION(strdup); 1159 INTERCEPT_FUNCTION(__strdup); 1160 INTERCEPT_FUNCTION(strndup); 1161 INTERCEPT_FUNCTION(__strndup); 1162 INTERCEPT_FUNCTION(strncpy); // NOLINT 1163 INTERCEPT_FUNCTION(strlen); 1164 INTERCEPT_FUNCTION(strnlen); 1165 INTERCEPT_FUNCTION(gcvt); 1166 INTERCEPT_FUNCTION(strcat); // NOLINT 1167 INTERCEPT_FUNCTION(strncat); // NOLINT 1168 INTERCEPT_FUNCTION(strtol); 1169 INTERCEPT_FUNCTION(strtoll); 1170 INTERCEPT_FUNCTION(strtoul); 1171 INTERCEPT_FUNCTION(strtoull); 1172 INTERCEPT_FUNCTION(strtod); 1173 INTERCEPT_FUNCTION(strtof); 1174 INTERCEPT_FUNCTION(strtold); 1175 INTERCEPT_FUNCTION(vasprintf); 1176 INTERCEPT_FUNCTION(asprintf); 1177 INTERCEPT_FUNCTION(vsprintf); 1178 INTERCEPT_FUNCTION(vsnprintf); 1179 INTERCEPT_FUNCTION(vswprintf); 1180 INTERCEPT_FUNCTION(sprintf); // NOLINT 1181 INTERCEPT_FUNCTION(snprintf); 1182 INTERCEPT_FUNCTION(swprintf); 1183 INTERCEPT_FUNCTION(strftime); 1184 INTERCEPT_FUNCTION(mbtowc); 1185 INTERCEPT_FUNCTION(mbrtowc); 1186 INTERCEPT_FUNCTION(wcslen); 1187 INTERCEPT_FUNCTION(wcschr); 1188 INTERCEPT_FUNCTION(wcscpy); 1189 INTERCEPT_FUNCTION(wcscmp); 1190 INTERCEPT_FUNCTION(wcstod); 1191 INTERCEPT_FUNCTION(getenv); 1192 INTERCEPT_FUNCTION(gettimeofday); 1193 INTERCEPT_FUNCTION(fcvt); 1194 INTERCEPT_FUNCTION(__fxstat); 1195 INTERCEPT_FUNCTION(__xstat); 1196 INTERCEPT_FUNCTION(__lxstat); 1197 INTERCEPT_FUNCTION(__fxstat64); 1198 INTERCEPT_FUNCTION(__xstat64); 1199 INTERCEPT_FUNCTION(__lxstat64); 1200 INTERCEPT_FUNCTION(pipe); 1201 INTERCEPT_FUNCTION(pipe2); 1202 INTERCEPT_FUNCTION(socketpair); 1203 INTERCEPT_FUNCTION(fgets); 1204 INTERCEPT_FUNCTION(fgets_unlocked); 1205 INTERCEPT_FUNCTION(getrlimit); 1206 INTERCEPT_FUNCTION(getrlimit64); 1207 INTERCEPT_FUNCTION(statfs); 1208 INTERCEPT_FUNCTION(fstatfs); 1209 INTERCEPT_FUNCTION(statfs64); 1210 INTERCEPT_FUNCTION(fstatfs64); 1211 INTERCEPT_FUNCTION(uname); 1212 INTERCEPT_FUNCTION(gethostname); 1213 INTERCEPT_FUNCTION(epoll_wait); 1214 INTERCEPT_FUNCTION(epoll_pwait); 1215 INTERCEPT_FUNCTION(recv); 1216 INTERCEPT_FUNCTION(recvfrom); 1217 INTERCEPT_FUNCTION(dladdr); 1218 INTERCEPT_FUNCTION(dlopen); 1219 INTERCEPT_FUNCTION(dl_iterate_phdr); 1220 INTERCEPT_FUNCTION(getrusage); 1221 INTERCEPT_FUNCTION(sigaction); 1222 INTERCEPT_FUNCTION(signal); 1223 INTERCEPT_FUNCTION(pthread_create); 1224 INTERCEPT_FUNCTION(pthread_key_create); 1225 inited = 1; 1226} 1227} // namespace __msan 1228