msan_interceptors.cc revision 4bbbe136fe6a19a8288a6d92af29075756dd8fa5
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(SIZE_T, wcslen, const wchar_t *s) { 409 ENSURE_MSAN_INITED(); 410 SIZE_T res = REAL(wcslen)(s); 411 CHECK_UNPOISONED(s, sizeof(wchar_t) * (res + 1)); 412 return res; 413} 414 415// wchar_t *wcschr(const wchar_t *wcs, wchar_t wc); 416INTERCEPTOR(wchar_t *, wcschr, void *s, wchar_t wc, void *ps) { 417 ENSURE_MSAN_INITED(); 418 wchar_t *res = REAL(wcschr)(s, wc, ps); 419 return res; 420} 421 422// wchar_t *wcscpy(wchar_t *dest, const wchar_t *src); 423INTERCEPTOR(wchar_t *, wcscpy, wchar_t *dest, const wchar_t *src) { 424 ENSURE_MSAN_INITED(); 425 wchar_t *res = REAL(wcscpy)(dest, src); 426 __msan_copy_poison(dest, src, sizeof(wchar_t) * (REAL(wcslen)(src) + 1)); 427 return res; 428} 429 430// wchar_t *wmemcpy(wchar_t *dest, const wchar_t *src, SIZE_T n); 431INTERCEPTOR(wchar_t *, wmemcpy, wchar_t *dest, const wchar_t *src, SIZE_T n) { 432 ENSURE_MSAN_INITED(); 433 wchar_t *res = REAL(wmemcpy)(dest, src, n); 434 __msan_copy_poison(dest, src, n * sizeof(wchar_t)); 435 return res; 436} 437 438INTERCEPTOR(wchar_t *, wmemset, wchar_t *s, wchar_t c, SIZE_T n) { 439 CHECK(MEM_IS_APP(s)); 440 ENSURE_MSAN_INITED(); 441 wchar_t *res = (wchar_t *)fast_memset(s, c, n * sizeof(wchar_t)); 442 __msan_unpoison(s, n * sizeof(wchar_t)); 443 return res; 444} 445 446INTERCEPTOR(wchar_t *, wmemmove, wchar_t *dest, const wchar_t *src, SIZE_T n) { 447 ENSURE_MSAN_INITED(); 448 wchar_t *res = REAL(wmemmove)(dest, src, n); 449 __msan_move_poison(dest, src, n * sizeof(wchar_t)); 450 return res; 451} 452 453INTERCEPTOR(int, wcscmp, const wchar_t *s1, const wchar_t *s2) { 454 ENSURE_MSAN_INITED(); 455 int res = REAL(wcscmp)(s1, s2); 456 return res; 457} 458 459INTERCEPTOR(double, wcstod, const wchar_t *nptr, wchar_t **endptr) { 460 ENSURE_MSAN_INITED(); 461 double res = REAL(wcstod)(nptr, endptr); 462 __msan_unpoison(endptr, sizeof(*endptr)); 463 return res; 464} 465 466// #define UNSUPPORTED(name) \ 467// INTERCEPTOR(void, name, void) { \ 468// Printf("MSAN: Unsupported %s\n", __FUNCTION__); \ 469// Die(); \ 470// } 471 472// FIXME: intercept the following functions: 473// Note, they only matter when running without a dynamic tool. 474// UNSUPPORTED(wcscoll_l) 475// UNSUPPORTED(wcsnrtombs) 476// UNSUPPORTED(wcstol) 477// UNSUPPORTED(wcstoll) 478// UNSUPPORTED(wcstold) 479// UNSUPPORTED(wcstoul) 480// UNSUPPORTED(wcstoull) 481// UNSUPPORTED(wcsxfrm_l) 482// UNSUPPORTED(wcsdup) 483// UNSUPPORTED(wcsftime) 484// UNSUPPORTED(wcsstr) 485// UNSUPPORTED(wcsrchr) 486// UNSUPPORTED(wctob) 487 488INTERCEPTOR(int, gettimeofday, void *tv, void *tz) { 489 ENSURE_MSAN_INITED(); 490 int res = REAL(gettimeofday)(tv, tz); 491 if (tv) 492 __msan_unpoison(tv, 16); 493 if (tz) 494 __msan_unpoison(tz, 8); 495 return res; 496} 497 498INTERCEPTOR(char *, fcvt, double x, int a, int *b, int *c) { 499 ENSURE_MSAN_INITED(); 500 char *res = REAL(fcvt)(x, a, b, c); 501 if (!__msan_has_dynamic_component()) { 502 __msan_unpoison(b, sizeof(*b)); 503 __msan_unpoison(c, sizeof(*c)); 504 } 505 return res; 506} 507 508INTERCEPTOR(char *, getenv, char *name) { 509 ENSURE_MSAN_INITED(); 510 char *res = REAL(getenv)(name); 511 if (!__msan_has_dynamic_component()) { 512 if (res) 513 __msan_unpoison(res, REAL(strlen)(res) + 1); 514 } 515 return res; 516} 517 518INTERCEPTOR(int, __fxstat, int magic, int fd, void *buf) { 519 ENSURE_MSAN_INITED(); 520 int res = REAL(__fxstat)(magic, fd, buf); 521 if (!res) 522 __msan_unpoison(buf, __sanitizer::struct_stat_sz); 523 return res; 524} 525 526INTERCEPTOR(int, __fxstat64, int magic, int fd, void *buf) { 527 ENSURE_MSAN_INITED(); 528 int res = REAL(__fxstat64)(magic, fd, buf); 529 if (!res) 530 __msan_unpoison(buf, __sanitizer::struct_stat64_sz); 531 return res; 532} 533 534INTERCEPTOR(int, __xstat, int magic, char *path, void *buf) { 535 ENSURE_MSAN_INITED(); 536 int res = REAL(__xstat)(magic, path, buf); 537 if (!res) 538 __msan_unpoison(buf, __sanitizer::struct_stat_sz); 539 return res; 540} 541 542INTERCEPTOR(int, __xstat64, int magic, char *path, void *buf) { 543 ENSURE_MSAN_INITED(); 544 int res = REAL(__xstat64)(magic, path, buf); 545 if (!res) 546 __msan_unpoison(buf, __sanitizer::struct_stat64_sz); 547 return res; 548} 549 550INTERCEPTOR(int, __lxstat, int magic, char *path, void *buf) { 551 ENSURE_MSAN_INITED(); 552 int res = REAL(__lxstat)(magic, path, buf); 553 if (!res) 554 __msan_unpoison(buf, __sanitizer::struct_stat_sz); 555 return res; 556} 557 558INTERCEPTOR(int, __lxstat64, int magic, char *path, void *buf) { 559 ENSURE_MSAN_INITED(); 560 int res = REAL(__lxstat64)(magic, path, buf); 561 if (!res) 562 __msan_unpoison(buf, __sanitizer::struct_stat64_sz); 563 return res; 564} 565 566INTERCEPTOR(int, pipe, int pipefd[2]) { 567 if (msan_init_is_running) 568 return REAL(pipe)(pipefd); 569 ENSURE_MSAN_INITED(); 570 int res = REAL(pipe)(pipefd); 571 if (!res) 572 __msan_unpoison(pipefd, sizeof(int[2])); 573 return res; 574} 575 576INTERCEPTOR(int, pipe2, int pipefd[2], int flags) { 577 ENSURE_MSAN_INITED(); 578 int res = REAL(pipe2)(pipefd, flags); 579 if (!res) 580 __msan_unpoison(pipefd, sizeof(int[2])); 581 return res; 582} 583 584INTERCEPTOR(int, socketpair, int domain, int type, int protocol, int sv[2]) { 585 ENSURE_MSAN_INITED(); 586 int res = REAL(socketpair)(domain, type, protocol, sv); 587 if (!res) 588 __msan_unpoison(sv, sizeof(int[2])); 589 return res; 590} 591 592INTERCEPTOR(char *, fgets, char *s, int size, void *stream) { 593 ENSURE_MSAN_INITED(); 594 char *res = REAL(fgets)(s, size, stream); 595 if (res) 596 __msan_unpoison(s, REAL(strlen)(s) + 1); 597 return res; 598} 599 600INTERCEPTOR(char *, fgets_unlocked, char *s, int size, void *stream) { 601 ENSURE_MSAN_INITED(); 602 char *res = REAL(fgets_unlocked)(s, size, stream); 603 if (res) 604 __msan_unpoison(s, REAL(strlen)(s) + 1); 605 return res; 606} 607 608INTERCEPTOR(char *, getcwd, char *buf, SIZE_T size) { 609 ENSURE_MSAN_INITED(); 610 char *res = REAL(getcwd)(buf, size); 611 if (res) 612 __msan_unpoison(res, REAL(strlen)(res) + 1); 613 return res; 614} 615 616INTERCEPTOR(char *, realpath, char *path, char *abspath) { 617 ENSURE_MSAN_INITED(); 618 char *res = REAL(realpath)(path, abspath); 619 if (res) 620 __msan_unpoison(abspath, REAL(strlen)(abspath) + 1); 621 return res; 622} 623 624INTERCEPTOR(int, getrlimit, int resource, void *rlim) { 625 if (msan_init_is_running) 626 return REAL(getrlimit)(resource, rlim); 627 ENSURE_MSAN_INITED(); 628 int res = REAL(getrlimit)(resource, rlim); 629 if (!res) 630 __msan_unpoison(rlim, __sanitizer::struct_rlimit_sz); 631 return res; 632} 633 634INTERCEPTOR(int, getrlimit64, int resource, void *rlim) { 635 if (msan_init_is_running) 636 return REAL(getrlimit64)(resource, rlim); 637 ENSURE_MSAN_INITED(); 638 int res = REAL(getrlimit64)(resource, rlim); 639 if (!res) 640 __msan_unpoison(rlim, __sanitizer::struct_rlimit64_sz); 641 return res; 642} 643 644INTERCEPTOR(int, statfs, const char *s, void *buf) { 645 ENSURE_MSAN_INITED(); 646 int res = REAL(statfs)(s, buf); 647 if (!res) 648 __msan_unpoison(buf, __sanitizer::struct_statfs_sz); 649 return res; 650} 651 652INTERCEPTOR(int, fstatfs, int fd, void *buf) { 653 ENSURE_MSAN_INITED(); 654 int res = REAL(fstatfs)(fd, buf); 655 if (!res) 656 __msan_unpoison(buf, __sanitizer::struct_statfs_sz); 657 return res; 658} 659 660INTERCEPTOR(int, statfs64, const char *s, void *buf) { 661 ENSURE_MSAN_INITED(); 662 int res = REAL(statfs64)(s, buf); 663 if (!res) 664 __msan_unpoison(buf, __sanitizer::struct_statfs64_sz); 665 return res; 666} 667 668INTERCEPTOR(int, fstatfs64, int fd, void *buf) { 669 ENSURE_MSAN_INITED(); 670 int res = REAL(fstatfs64)(fd, buf); 671 if (!res) 672 __msan_unpoison(buf, __sanitizer::struct_statfs64_sz); 673 return res; 674} 675 676INTERCEPTOR(int, uname, void *utsname) { 677 ENSURE_MSAN_INITED(); 678 int res = REAL(uname)(utsname); 679 if (!res) { 680 __msan_unpoison(utsname, __sanitizer::struct_utsname_sz); 681 } 682 return res; 683} 684 685INTERCEPTOR(int, gethostname, char *name, SIZE_T len) { 686 ENSURE_MSAN_INITED(); 687 int res = REAL(gethostname)(name, len); 688 if (!res) { 689 SIZE_T real_len = REAL(strnlen)(name, len); 690 if (real_len < len) 691 ++real_len; 692 __msan_unpoison(name, real_len); 693 } 694 return res; 695} 696 697INTERCEPTOR(int, epoll_wait, int epfd, void *events, int maxevents, 698 int timeout) { 699 ENSURE_MSAN_INITED(); 700 int res = REAL(epoll_wait)(epfd, events, maxevents, timeout); 701 if (res > 0) { 702 __msan_unpoison(events, __sanitizer::struct_epoll_event_sz * res); 703 } 704 return res; 705} 706 707INTERCEPTOR(int, epoll_pwait, int epfd, void *events, int maxevents, 708 int timeout, void *sigmask) { 709 ENSURE_MSAN_INITED(); 710 int res = REAL(epoll_pwait)(epfd, events, maxevents, timeout, sigmask); 711 if (res > 0) { 712 __msan_unpoison(events, __sanitizer::struct_epoll_event_sz * res); 713 } 714 return res; 715} 716 717INTERCEPTOR(SSIZE_T, recv, int fd, void *buf, SIZE_T len, int flags) { 718 ENSURE_MSAN_INITED(); 719 SSIZE_T res = REAL(recv)(fd, buf, len, flags); 720 if (res > 0) 721 __msan_unpoison(buf, res); 722 return res; 723} 724 725INTERCEPTOR(SSIZE_T, recvfrom, int fd, void *buf, SIZE_T len, int flags, 726 void *srcaddr, int *addrlen) { 727 ENSURE_MSAN_INITED(); 728 SIZE_T srcaddr_sz; 729 if (srcaddr) srcaddr_sz = *addrlen; 730 SSIZE_T res = REAL(recvfrom)(fd, buf, len, flags, srcaddr, addrlen); 731 if (res > 0) { 732 __msan_unpoison(buf, res); 733 if (srcaddr) { 734 SIZE_T sz = *addrlen; 735 __msan_unpoison(srcaddr, (sz < srcaddr_sz) ? sz : srcaddr_sz); 736 } 737 } 738 return res; 739} 740 741INTERCEPTOR(void *, calloc, SIZE_T nmemb, SIZE_T size) { 742 if (CallocShouldReturnNullDueToOverflow(size, nmemb)) return 0; 743 GET_MALLOC_STACK_TRACE; 744 if (!msan_inited) { 745 // Hack: dlsym calls calloc before REAL(calloc) is retrieved from dlsym. 746 const SIZE_T kCallocPoolSize = 1024; 747 static uptr calloc_memory_for_dlsym[kCallocPoolSize]; 748 static SIZE_T allocated; 749 SIZE_T size_in_words = ((nmemb * size) + kWordSize - 1) / kWordSize; 750 void *mem = (void*)&calloc_memory_for_dlsym[allocated]; 751 allocated += size_in_words; 752 CHECK(allocated < kCallocPoolSize); 753 return mem; 754 } 755 return MsanReallocate(&stack, 0, nmemb * size, sizeof(u64), true); 756} 757 758INTERCEPTOR(void *, realloc, void *ptr, SIZE_T size) { 759 GET_MALLOC_STACK_TRACE; 760 return MsanReallocate(&stack, ptr, size, sizeof(u64), false); 761} 762 763INTERCEPTOR(void *, malloc, SIZE_T size) { 764 GET_MALLOC_STACK_TRACE; 765 return MsanReallocate(&stack, 0, size, sizeof(u64), false); 766} 767 768void __msan_allocated_memory(const void* data, uptr size) { 769 GET_MALLOC_STACK_TRACE; 770 if (flags()->poison_in_malloc) 771 __msan_poison(data, size); 772 if (__msan_get_track_origins()) { 773 u32 stack_id = StackDepotPut(stack.trace, stack.size); 774 CHECK(stack_id); 775 CHECK_EQ((stack_id >> 31), 0); // Higher bit is occupied by stack origins. 776 __msan_set_origin(data, size, stack_id); 777 } 778} 779 780INTERCEPTOR(void *, mmap, void *addr, SIZE_T length, int prot, int flags, 781 int fd, OFF_T offset) { 782 ENSURE_MSAN_INITED(); 783 void *res = REAL(mmap)(addr, length, prot, flags, fd, offset); 784 if (res != (void*)-1) 785 __msan_unpoison(res, RoundUpTo(length, GetPageSize())); 786 return res; 787} 788 789INTERCEPTOR(void *, mmap64, void *addr, SIZE_T length, int prot, int flags, 790 int fd, OFF64_T offset) { 791 ENSURE_MSAN_INITED(); 792 void *res = REAL(mmap64)(addr, length, prot, flags, fd, offset); 793 if (res != (void*)-1) 794 __msan_unpoison(res, RoundUpTo(length, GetPageSize())); 795 return res; 796} 797 798struct dlinfo { 799 char *dli_fname; 800 void *dli_fbase; 801 char *dli_sname; 802 void *dli_saddr; 803}; 804 805INTERCEPTOR(int, dladdr, void *addr, dlinfo *info) { 806 ENSURE_MSAN_INITED(); 807 int res = REAL(dladdr)(addr, info); 808 if (res != 0) { 809 __msan_unpoison(info, sizeof(*info)); 810 if (info->dli_fname) 811 __msan_unpoison(info->dli_fname, REAL(strlen)(info->dli_fname) + 1); 812 if (info->dli_sname) 813 __msan_unpoison(info->dli_sname, REAL(strlen)(info->dli_sname) + 1); 814 } 815 return res; 816} 817 818// dlopen() ultimately calls mmap() down inside the loader, which generally 819// doesn't participate in dynamic symbol resolution. Therefore we won't 820// intercept its calls to mmap, and we have to hook it here. The loader 821// initializes the module before returning, so without the dynamic component, we 822// won't be able to clear the shadow before the initializers. Fixing this would 823// require putting our own initializer first to clear the shadow. 824INTERCEPTOR(void *, dlopen, const char *filename, int flag) { 825 ENSURE_MSAN_INITED(); 826 EnterLoader(); 827 link_map *map = (link_map *)REAL(dlopen)(filename, flag); 828 ExitLoader(); 829 if (!__msan_has_dynamic_component() && map) { 830 // If msandr didn't clear the shadow before the initializers ran, we do it 831 // ourselves afterwards. 832 UnpoisonMappedDSO(map); 833 } 834 return (void *)map; 835} 836 837typedef int (*dl_iterate_phdr_cb)(__sanitizer_dl_phdr_info *info, SIZE_T size, 838 void *data); 839struct dl_iterate_phdr_data { 840 dl_iterate_phdr_cb callback; 841 void *data; 842}; 843 844static int msan_dl_iterate_phdr_cb(__sanitizer_dl_phdr_info *info, SIZE_T size, 845 void *data) { 846 if (info) { 847 __msan_unpoison(info, size); 848 if (info->dlpi_name) 849 __msan_unpoison(info->dlpi_name, REAL(strlen)(info->dlpi_name) + 1); 850 } 851 dl_iterate_phdr_data *cbdata = (dl_iterate_phdr_data *)data; 852 UnpoisonParam(3); 853 return cbdata->callback(info, size, cbdata->data); 854} 855 856INTERCEPTOR(int, dl_iterate_phdr, dl_iterate_phdr_cb callback, void *data) { 857 ENSURE_MSAN_INITED(); 858 EnterLoader(); 859 dl_iterate_phdr_data cbdata; 860 cbdata.callback = callback; 861 cbdata.data = data; 862 int res = REAL(dl_iterate_phdr)(msan_dl_iterate_phdr_cb, (void *)&cbdata); 863 ExitLoader(); 864 return res; 865} 866 867INTERCEPTOR(int, getrusage, int who, void *usage) { 868 ENSURE_MSAN_INITED(); 869 int res = REAL(getrusage)(who, usage); 870 if (res == 0) { 871 __msan_unpoison(usage, __sanitizer::struct_rusage_sz); 872 } 873 return res; 874} 875 876const int kMaxSignals = 1024; 877static uptr sigactions[kMaxSignals]; 878static StaticSpinMutex sigactions_mu; 879 880static void SignalHandler(int signo) { 881 typedef void (*signal_cb)(int x); 882 signal_cb cb = (signal_cb)sigactions[signo]; 883 cb(signo); 884} 885 886static void SignalAction(int signo, void *si, void *uc) { 887 UnpoisonParam(3); 888 __msan_unpoison(si, __sanitizer::struct_sigaction_sz); 889 __msan_unpoison(uc, __sanitizer::ucontext_t_sz); 890 891 typedef void (*sigaction_cb)(int, void *, void *); 892 sigaction_cb cb = (sigaction_cb)sigactions[signo]; 893 cb(signo, si, uc); 894} 895 896INTERCEPTOR(int, sigaction, int signo, const __sanitizer_sigaction *act, 897 __sanitizer_sigaction *oldact) { 898 ENSURE_MSAN_INITED(); 899 // FIXME: check that *act is unpoisoned. 900 // That requires intercepting all of sigemptyset, sigfillset, etc. 901 int res; 902 if (flags()->wrap_signals) { 903 SpinMutexLock lock(&sigactions_mu); 904 CHECK_LT(signo, kMaxSignals); 905 uptr old_cb = sigactions[signo]; 906 __sanitizer_sigaction new_act; 907 __sanitizer_sigaction *pnew_act = act ? &new_act : 0; 908 if (act) { 909 internal_memcpy(pnew_act, act, __sanitizer::struct_sigaction_sz); 910 uptr cb = __sanitizer::__sanitizer_get_sigaction_sa_sigaction(pnew_act); 911 uptr new_cb = 912 __sanitizer::__sanitizer_get_sigaction_sa_siginfo(pnew_act) ? 913 (uptr)SignalAction : (uptr)SignalHandler; 914 if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) { 915 sigactions[signo] = cb; 916 __sanitizer::__sanitizer_set_sigaction_sa_sigaction(pnew_act, new_cb); 917 } 918 } 919 res = REAL(sigaction)(signo, pnew_act, oldact); 920 if (res == 0 && oldact) { 921 uptr cb = __sanitizer::__sanitizer_get_sigaction_sa_sigaction(oldact); 922 if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) { 923 __sanitizer::__sanitizer_set_sigaction_sa_sigaction(oldact, old_cb); 924 } 925 } 926 } else { 927 res = REAL(sigaction)(signo, act, oldact); 928 } 929 930 if (res == 0 && oldact) { 931 __msan_unpoison(oldact, __sanitizer::struct_sigaction_sz); 932 } 933 return res; 934} 935 936INTERCEPTOR(int, signal, int signo, uptr cb) { 937 ENSURE_MSAN_INITED(); 938 if (flags()->wrap_signals) { 939 CHECK_LT(signo, kMaxSignals); 940 SpinMutexLock lock(&sigactions_mu); 941 if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) { 942 sigactions[signo] = cb; 943 cb = (uptr) SignalHandler; 944 } 945 return REAL(signal)(signo, cb); 946 } else { 947 return REAL(signal)(signo, cb); 948 } 949} 950 951extern "C" int pthread_attr_init(void *attr); 952extern "C" int pthread_attr_destroy(void *attr); 953extern "C" int pthread_attr_setstacksize(void *attr, uptr stacksize); 954extern "C" int pthread_attr_getstack(void *attr, uptr *stack, uptr *stacksize); 955 956INTERCEPTOR(int, pthread_create, void *th, void *attr, void *(*callback)(void*), 957 void * param) { 958 ENSURE_MSAN_INITED(); // for GetTlsSize() 959 __sanitizer_pthread_attr_t myattr; 960 if (attr == 0) { 961 pthread_attr_init(&myattr); 962 attr = &myattr; 963 } 964 965 AdjustStackSizeLinux(attr, flags()->verbosity); 966 967 int res = REAL(pthread_create)(th, attr, callback, param); 968 if (attr == &myattr) 969 pthread_attr_destroy(&myattr); 970 if (!res) { 971 __msan_unpoison(th, __sanitizer::pthread_t_sz); 972 } 973 return res; 974} 975 976struct MSanInterceptorContext { 977 bool in_interceptor_scope; 978}; 979 980// A version of CHECK_UNPOISED using a saved scope value. Used in common 981// interceptors. 982#define CHECK_UNPOISONED_CTX(ctx, x, n) \ 983 do { \ 984 if (!((MSanInterceptorContext *)ctx)->in_interceptor_scope) \ 985 CHECK_UNPOISONED_0(x, n); \ 986 } while (0) 987 988#define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \ 989 __msan_unpoison(ptr, size) 990#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) \ 991 CHECK_UNPOISONED_CTX(ctx, ptr, size) 992#define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \ 993 if (msan_init_is_running) return REAL(func)(__VA_ARGS__); \ 994 MSanInterceptorContext msan_ctx = {IsInInterceptorScope()}; \ 995 ctx = (void *)&msan_ctx; \ 996 InterceptorScope interceptor_scope; \ 997 ENSURE_MSAN_INITED(); 998#define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) \ 999 do { \ 1000 } while (false) 1001#define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd) \ 1002 do { \ 1003 } while (false) 1004#define COMMON_INTERCEPTOR_FD_SOCKET_ACCEPT(ctx, fd, newfd) \ 1005 do { \ 1006 } while (false) 1007#define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name) \ 1008 do { \ 1009 } while (false) // FIXME 1010#include "sanitizer_common/sanitizer_common_interceptors.inc" 1011 1012#define COMMON_SYSCALL_PRE_READ_RANGE(p, s) CHECK_UNPOISONED(p, s) 1013#define COMMON_SYSCALL_PRE_WRITE_RANGE(p, s) 1014#define COMMON_SYSCALL_POST_READ_RANGE(p, s) 1015#define COMMON_SYSCALL_POST_WRITE_RANGE(p, s) __msan_unpoison(p, s) 1016#include "sanitizer_common/sanitizer_common_syscalls.inc" 1017 1018// static 1019void *fast_memset(void *ptr, int c, SIZE_T n) { 1020 // hack until we have a really fast internal_memset 1021 if (sizeof(uptr) == 8 && 1022 (n % 8) == 0 && 1023 ((uptr)ptr % 8) == 0 && 1024 (c == 0 || c == -1)) { 1025 // Printf("memset %p %zd %x\n", ptr, n, c); 1026 uptr to_store = c ? -1L : 0L; 1027 uptr *p = (uptr*)ptr; 1028 for (SIZE_T i = 0; i < n / 8; i++) 1029 p[i] = to_store; 1030 return ptr; 1031 } 1032 return internal_memset(ptr, c, n); 1033} 1034 1035// static 1036void *fast_memcpy(void *dst, const void *src, SIZE_T n) { 1037 // Same hack as in fast_memset above. 1038 if (sizeof(uptr) == 8 && 1039 (n % 8) == 0 && 1040 ((uptr)dst % 8) == 0 && 1041 ((uptr)src % 8) == 0) { 1042 uptr *d = (uptr*)dst; 1043 uptr *s = (uptr*)src; 1044 for (SIZE_T i = 0; i < n / 8; i++) 1045 d[i] = s[i]; 1046 return dst; 1047 } 1048 return internal_memcpy(dst, src, n); 1049} 1050 1051// These interface functions reside here so that they can use 1052// fast_memset, etc. 1053void __msan_unpoison(const void *a, uptr size) { 1054 if (!MEM_IS_APP(a)) return; 1055 fast_memset((void*)MEM_TO_SHADOW((uptr)a), 0, size); 1056} 1057 1058void __msan_poison(const void *a, uptr size) { 1059 if (!MEM_IS_APP(a)) return; 1060 fast_memset((void*)MEM_TO_SHADOW((uptr)a), 1061 __msan::flags()->poison_heap_with_zeroes ? 0 : -1, size); 1062} 1063 1064void __msan_poison_stack(void *a, uptr size) { 1065 if (!MEM_IS_APP(a)) return; 1066 fast_memset((void*)MEM_TO_SHADOW((uptr)a), 1067 __msan::flags()->poison_stack_with_zeroes ? 0 : -1, size); 1068} 1069 1070void __msan_clear_and_unpoison(void *a, uptr size) { 1071 fast_memset(a, 0, size); 1072 fast_memset((void*)MEM_TO_SHADOW((uptr)a), 0, size); 1073} 1074 1075void __msan_copy_origin(void *dst, const void *src, uptr size) { 1076 if (!__msan_get_track_origins()) return; 1077 if (!MEM_IS_APP(dst) || !MEM_IS_APP(src)) return; 1078 uptr d = MEM_TO_ORIGIN(dst); 1079 uptr s = MEM_TO_ORIGIN(src); 1080 uptr beg = d & ~3UL; // align down. 1081 uptr end = (d + size + 3) & ~3UL; // align up. 1082 s = s & ~3UL; // align down. 1083 fast_memcpy((void*)beg, (void*)s, end - beg); 1084} 1085 1086void __msan_copy_poison(void *dst, const void *src, uptr size) { 1087 if (!MEM_IS_APP(dst)) return; 1088 if (!MEM_IS_APP(src)) return; 1089 fast_memcpy((void*)MEM_TO_SHADOW((uptr)dst), 1090 (void*)MEM_TO_SHADOW((uptr)src), size); 1091 __msan_copy_origin(dst, src, size); 1092} 1093 1094void __msan_move_poison(void *dst, const void *src, uptr size) { 1095 if (!MEM_IS_APP(dst)) return; 1096 if (!MEM_IS_APP(src)) return; 1097 internal_memmove((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_memcpy(void *dest, const void *src, SIZE_T n) { 1103 ENSURE_MSAN_INITED(); 1104 void *res = fast_memcpy(dest, src, n); 1105 __msan_copy_poison(dest, src, n); 1106 return res; 1107} 1108 1109void *__msan_memset(void *s, int c, SIZE_T n) { 1110 ENSURE_MSAN_INITED(); 1111 void *res = fast_memset(s, c, n); 1112 __msan_unpoison(s, n); 1113 return res; 1114} 1115 1116void *__msan_memmove(void *dest, const void *src, SIZE_T n) { 1117 ENSURE_MSAN_INITED(); 1118 void *res = REAL(memmove)(dest, src, n); 1119 __msan_move_poison(dest, src, n); 1120 return res; 1121} 1122 1123namespace __msan { 1124void InitializeInterceptors() { 1125 static int inited = 0; 1126 CHECK_EQ(inited, 0); 1127 SANITIZER_COMMON_INTERCEPTORS_INIT; 1128 1129 INTERCEPT_FUNCTION(mmap); 1130 INTERCEPT_FUNCTION(mmap64); 1131 INTERCEPT_FUNCTION(posix_memalign); 1132 INTERCEPT_FUNCTION(malloc); 1133 INTERCEPT_FUNCTION(calloc); 1134 INTERCEPT_FUNCTION(realloc); 1135 INTERCEPT_FUNCTION(free); 1136 INTERCEPT_FUNCTION(fread); 1137 INTERCEPT_FUNCTION(fread_unlocked); 1138 INTERCEPT_FUNCTION(readlink); 1139 INTERCEPT_FUNCTION(memcpy); 1140 INTERCEPT_FUNCTION(memset); 1141 INTERCEPT_FUNCTION(memmove); 1142 INTERCEPT_FUNCTION(wmemset); 1143 INTERCEPT_FUNCTION(wmemcpy); 1144 INTERCEPT_FUNCTION(wmemmove); 1145 INTERCEPT_FUNCTION(strcpy); // NOLINT 1146 INTERCEPT_FUNCTION(stpcpy); // NOLINT 1147 INTERCEPT_FUNCTION(strdup); 1148 INTERCEPT_FUNCTION(__strdup); 1149 INTERCEPT_FUNCTION(strndup); 1150 INTERCEPT_FUNCTION(__strndup); 1151 INTERCEPT_FUNCTION(strncpy); // NOLINT 1152 INTERCEPT_FUNCTION(strlen); 1153 INTERCEPT_FUNCTION(strnlen); 1154 INTERCEPT_FUNCTION(gcvt); 1155 INTERCEPT_FUNCTION(strcat); // NOLINT 1156 INTERCEPT_FUNCTION(strncat); // NOLINT 1157 INTERCEPT_FUNCTION(strtol); 1158 INTERCEPT_FUNCTION(strtoll); 1159 INTERCEPT_FUNCTION(strtoul); 1160 INTERCEPT_FUNCTION(strtoull); 1161 INTERCEPT_FUNCTION(strtod); 1162 INTERCEPT_FUNCTION(strtof); 1163 INTERCEPT_FUNCTION(strtold); 1164 INTERCEPT_FUNCTION(vasprintf); 1165 INTERCEPT_FUNCTION(asprintf); 1166 INTERCEPT_FUNCTION(vsprintf); 1167 INTERCEPT_FUNCTION(vsnprintf); 1168 INTERCEPT_FUNCTION(vswprintf); 1169 INTERCEPT_FUNCTION(sprintf); // NOLINT 1170 INTERCEPT_FUNCTION(snprintf); 1171 INTERCEPT_FUNCTION(swprintf); 1172 INTERCEPT_FUNCTION(strftime); 1173 INTERCEPT_FUNCTION(wcstombs); 1174 INTERCEPT_FUNCTION(mbstowcs); 1175 INTERCEPT_FUNCTION(wcslen); 1176 INTERCEPT_FUNCTION(wcschr); 1177 INTERCEPT_FUNCTION(wcscpy); 1178 INTERCEPT_FUNCTION(wcscmp); 1179 INTERCEPT_FUNCTION(wcstod); 1180 INTERCEPT_FUNCTION(getenv); 1181 INTERCEPT_FUNCTION(gettimeofday); 1182 INTERCEPT_FUNCTION(fcvt); 1183 INTERCEPT_FUNCTION(__fxstat); 1184 INTERCEPT_FUNCTION(__xstat); 1185 INTERCEPT_FUNCTION(__lxstat); 1186 INTERCEPT_FUNCTION(__fxstat64); 1187 INTERCEPT_FUNCTION(__xstat64); 1188 INTERCEPT_FUNCTION(__lxstat64); 1189 INTERCEPT_FUNCTION(pipe); 1190 INTERCEPT_FUNCTION(pipe2); 1191 INTERCEPT_FUNCTION(socketpair); 1192 INTERCEPT_FUNCTION(fgets); 1193 INTERCEPT_FUNCTION(fgets_unlocked); 1194 INTERCEPT_FUNCTION(getcwd); 1195 INTERCEPT_FUNCTION(realpath); 1196 INTERCEPT_FUNCTION(getrlimit); 1197 INTERCEPT_FUNCTION(getrlimit64); 1198 INTERCEPT_FUNCTION(statfs); 1199 INTERCEPT_FUNCTION(fstatfs); 1200 INTERCEPT_FUNCTION(statfs64); 1201 INTERCEPT_FUNCTION(fstatfs64); 1202 INTERCEPT_FUNCTION(uname); 1203 INTERCEPT_FUNCTION(gethostname); 1204 INTERCEPT_FUNCTION(epoll_wait); 1205 INTERCEPT_FUNCTION(epoll_pwait); 1206 INTERCEPT_FUNCTION(recv); 1207 INTERCEPT_FUNCTION(recvfrom); 1208 INTERCEPT_FUNCTION(dladdr); 1209 INTERCEPT_FUNCTION(dlopen); 1210 INTERCEPT_FUNCTION(dl_iterate_phdr); 1211 INTERCEPT_FUNCTION(getrusage); 1212 INTERCEPT_FUNCTION(sigaction); 1213 INTERCEPT_FUNCTION(signal); 1214 INTERCEPT_FUNCTION(pthread_create); 1215 inited = 1; 1216} 1217} // namespace __msan 1218