asan_interceptors.cc revision e767e350b1a6461bc29cfea28af75f908d7da56e
1e5f5895bda30f374b0b51412fd4d837fa59aed66Alexey Samsonov//===-- asan_interceptors.cc ----------------------------------------------===// 21e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// 31e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// The LLVM Compiler Infrastructure 41e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// 51e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// This file is distributed under the University of Illinois Open Source 61e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// License. See LICENSE.TXT for details. 71e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// 81e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany//===----------------------------------------------------------------------===// 91e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// 101e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// This file is a part of AddressSanitizer, an address sanity checker. 111e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// 12d47189c1b63a4de755d7ec071f8d56c8d01cc667Kostya Serebryany// Intercept various libc functions. 131e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany//===----------------------------------------------------------------------===// 141e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany#include "asan_interceptors.h" 151e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 161e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany#include "asan_allocator.h" 1705bf9a51dfeac0f84f6dbc2dacf987249c0fc612Alexander Potapenko#include "asan_intercepted_functions.h" 181e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany#include "asan_internal.h" 191e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany#include "asan_mapping.h" 207e8434940a1fe7dce531d4c458ccd714da48f609Alexey Samsonov#include "asan_poisoning.h" 21487fee7f6f7497906a00d7d2fe2c75e6d5d4feb1Alexey Samsonov#include "asan_report.h" 221e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany#include "asan_stack.h" 231e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany#include "asan_stats.h" 245b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov#include "interception/interception.h" 25c0d78c1de1f2607c874020d27b72cf989c5ce092Alexey Samsonov#include "sanitizer_common/sanitizer_libc.h" 26c0d78c1de1f2607c874020d27b72cf989c5ce092Alexey Samsonov 271e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryanynamespace __asan { 281e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 29a84805f1ccb2b7d4b6c0ba384bd3541fa4eaf808Kostya Serebryany// Return true if we can quickly decide that the region is unpoisoned. 30a84805f1ccb2b7d4b6c0ba384bd3541fa4eaf808Kostya Serebryanystatic inline bool QuickCheckForUnpoisonedRegion(uptr beg, uptr size) { 31a84805f1ccb2b7d4b6c0ba384bd3541fa4eaf808Kostya Serebryany if (size == 0) return true; 32a84805f1ccb2b7d4b6c0ba384bd3541fa4eaf808Kostya Serebryany if (size <= 32) 33a84805f1ccb2b7d4b6c0ba384bd3541fa4eaf808Kostya Serebryany return !AddressIsPoisoned(beg) && 34a84805f1ccb2b7d4b6c0ba384bd3541fa4eaf808Kostya Serebryany !AddressIsPoisoned(beg + size - 1) && 35a84805f1ccb2b7d4b6c0ba384bd3541fa4eaf808Kostya Serebryany !AddressIsPoisoned(beg + size / 2); 36a84805f1ccb2b7d4b6c0ba384bd3541fa4eaf808Kostya Serebryany return false; 37a84805f1ccb2b7d4b6c0ba384bd3541fa4eaf808Kostya Serebryany} 38a84805f1ccb2b7d4b6c0ba384bd3541fa4eaf808Kostya Serebryany 391e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// We implement ACCESS_MEMORY_RANGE, ASAN_READ_RANGE, 401e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// and ASAN_WRITE_RANGE as macro instead of function so 411e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// that no extra frames are created, and stack trace contains 421e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// relevant information only. 43eb2809311c94b73c269ccef8d68ae368642e5754Kostya Serebryany// We check all shadow bytes. 44589dcdaa520de1033a0f6112c9b67ab9eb7931afEvgeniy Stepanov#define ACCESS_MEMORY_RANGE(offset, size, isWrite) do { \ 45589dcdaa520de1033a0f6112c9b67ab9eb7931afEvgeniy Stepanov uptr __offset = (uptr)(offset); \ 46589dcdaa520de1033a0f6112c9b67ab9eb7931afEvgeniy Stepanov uptr __size = (uptr)(size); \ 471b057b20db71ec6cc2bac460c8b2848f0889d47dKostya Serebryany uptr __bad = 0; \ 48a84805f1ccb2b7d4b6c0ba384bd3541fa4eaf808Kostya Serebryany if (!QuickCheckForUnpoisonedRegion(__offset, __size) && \ 491b057b20db71ec6cc2bac460c8b2848f0889d47dKostya Serebryany (__bad = __asan_region_is_poisoned(__offset, __size))) { \ 50589dcdaa520de1033a0f6112c9b67ab9eb7931afEvgeniy Stepanov GET_CURRENT_PC_BP_SP; \ 511b057b20db71ec6cc2bac460c8b2848f0889d47dKostya Serebryany __asan_report_error(pc, bp, sp, __bad, isWrite, __size); \ 52589dcdaa520de1033a0f6112c9b67ab9eb7931afEvgeniy Stepanov } \ 53589dcdaa520de1033a0f6112c9b67ab9eb7931afEvgeniy Stepanov } while (0) 541e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 55eb2809311c94b73c269ccef8d68ae368642e5754Kostya Serebryany#define ASAN_READ_RANGE(offset, size) ACCESS_MEMORY_RANGE(offset, size, false) 56341b9e63f63a8eacf1b699d4c79edee55241ebe6Evgeniy Stepanov#define ASAN_WRITE_RANGE(offset, size) ACCESS_MEMORY_RANGE(offset, size, true) 571e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 581e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// Behavior of functions like "memcpy" or "strcpy" is undefined 591e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// if memory intervals overlap. We report error in this case. 601e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// Macro is used to avoid creation of new frames. 613f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryanystatic inline bool RangesOverlap(const char *offset1, uptr length1, 623f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany const char *offset2, uptr length2) { 630985ca240812ac5519168a6aecbccf4c513ae243Kostya Serebryany return !((offset1 + length1 <= offset2) || (offset2 + length2 <= offset1)); 641e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 65c5e72a3b7c60f1b2d9d9be3a07d397d5b5f872beKostya Serebryany#define CHECK_RANGES_OVERLAP(name, _offset1, length1, _offset2, length2) do { \ 661e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany const char *offset1 = (const char*)_offset1; \ 671e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany const char *offset2 = (const char*)_offset2; \ 680985ca240812ac5519168a6aecbccf4c513ae243Kostya Serebryany if (RangesOverlap(offset1, length1, offset2, length2)) { \ 69a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany GET_STACK_TRACE_FATAL_HERE; \ 70487fee7f6f7497906a00d7d2fe2c75e6d5d4feb1Alexey Samsonov ReportStringFunctionMemoryRangesOverlap(name, offset1, length1, \ 71487fee7f6f7497906a00d7d2fe2c75e6d5d4feb1Alexey Samsonov offset2, length2, &stack); \ 721e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } \ 73e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany} while (0) 741e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 75e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany#define ENSURE_ASAN_INITED() do { \ 76e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany CHECK(!asan_init_is_running); \ 77e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany if (!asan_inited) { \ 78e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany __asan_init(); \ 79e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany } \ 80e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany} while (0) 811e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 82c925697df6626bb0ea27ea96539bf0580f8f3d3dAlexey Samsonovstatic inline uptr MaybeRealStrnlen(const char *s, uptr maxlen) { 8381a7a4ab53c94e76c3b131d6f0ed82894640900bAlexey Samsonov#if ASAN_INTERCEPT_STRNLEN 843f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany if (REAL(strnlen) != 0) { 8509672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(strnlen)(s, maxlen); 861e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 87f2598fc21bf651d23feab396a7581d48c01c3be5Alexey Samsonov#endif 88c925697df6626bb0ea27ea96539bf0580f8f3d3dAlexey Samsonov return internal_strnlen(s, maxlen); 89a4ccf878e464d29a4a18756c5c4f626dc530a12eKostya Serebryany} 901e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 91c20b321d49f0eff60f1394d56e623d8ca94f24d7Kostya Serebryanyvoid SetThreadName(const char *name) { 9289c1384464848c1ad041becf8b97936fa10de21bAlexey Samsonov AsanThread *t = GetCurrentThread(); 93c20b321d49f0eff60f1394d56e623d8ca94f24d7Kostya Serebryany if (t) 94def1be9b7ef4091ce465c0fbfb26cdb52128ade8Alexey Samsonov asanThreadRegistry().SetThreadName(t->tid(), name); 95c20b321d49f0eff60f1394d56e623d8ca94f24d7Kostya Serebryany} 96c20b321d49f0eff60f1394d56e623d8ca94f24d7Kostya Serebryany 978cde99fb9df913aaf7c1715cd134110dd5a15834Dmitry Vyukovint OnExit() { 9814dd980b384ad859099b499e12f320c4791fb674Dmitry Vyukov // FIXME: ask frontend whether we need to return failure. 9914dd980b384ad859099b499e12f320c4791fb674Dmitry Vyukov return 0; 10014dd980b384ad859099b499e12f320c4791fb674Dmitry Vyukov} 10114dd980b384ad859099b499e12f320c4791fb674Dmitry Vyukov 1021e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} // namespace __asan 1031e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 1041e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// ---------------------- Wrappers ---------------- {{{1 1051e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryanyusing namespace __asan; // NOLINT 1061e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 10712eb79dd701d9d40551759330a9257316601373bEvgeniy StepanovDECLARE_REAL_AND_INTERCEPTOR(void *, malloc, uptr) 10812eb79dd701d9d40551759330a9257316601373bEvgeniy StepanovDECLARE_REAL_AND_INTERCEPTOR(void, free, void *) 10912eb79dd701d9d40551759330a9257316601373bEvgeniy Stepanov 110a537ea99d3dcc4b2dc0033aee7ad5cb1b378efc7Evgeniy Stepanov#if !SANITIZER_MAC 111a537ea99d3dcc4b2dc0033aee7ad5cb1b378efc7Evgeniy Stepanov#define ASAN_INTERCEPT_FUNC(name) \ 112a537ea99d3dcc4b2dc0033aee7ad5cb1b378efc7Evgeniy Stepanov do { \ 113a537ea99d3dcc4b2dc0033aee7ad5cb1b378efc7Evgeniy Stepanov if ((!INTERCEPT_FUNCTION(name) || !REAL(name)) && \ 114a537ea99d3dcc4b2dc0033aee7ad5cb1b378efc7Evgeniy Stepanov common_flags()->verbosity > 0) \ 115a537ea99d3dcc4b2dc0033aee7ad5cb1b378efc7Evgeniy Stepanov Report("AddressSanitizer: failed to intercept '" #name "'\n"); \ 116a537ea99d3dcc4b2dc0033aee7ad5cb1b378efc7Evgeniy Stepanov } while (0) 117a537ea99d3dcc4b2dc0033aee7ad5cb1b378efc7Evgeniy Stepanov#else 118a537ea99d3dcc4b2dc0033aee7ad5cb1b378efc7Evgeniy Stepanov// OS X interceptors don't need to be initialized with INTERCEPT_FUNCTION. 119a537ea99d3dcc4b2dc0033aee7ad5cb1b378efc7Evgeniy Stepanov#define ASAN_INTERCEPT_FUNC(name) 120a537ea99d3dcc4b2dc0033aee7ad5cb1b378efc7Evgeniy Stepanov#endif // SANITIZER_MAC 121a537ea99d3dcc4b2dc0033aee7ad5cb1b378efc7Evgeniy Stepanov 122a537ea99d3dcc4b2dc0033aee7ad5cb1b378efc7Evgeniy Stepanov#define COMMON_INTERCEPT_FUNCTION(name) ASAN_INTERCEPT_FUNC(name) 1233fa122e6a8e12db6583793861f6cf776fe1c98a0Evgeniy Stepanov#define COMMON_INTERCEPTOR_UNPOISON_PARAM(ctx, count) \ 1243fa122e6a8e12db6583793861f6cf776fe1c98a0Evgeniy Stepanov do { \ 1253fa122e6a8e12db6583793861f6cf776fe1c98a0Evgeniy Stepanov } while (false) 12682a9080eaff95d69b270cd863e9df63e3b4e59adEvgeniy Stepanov#define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \ 12782a9080eaff95d69b270cd863e9df63e3b4e59adEvgeniy Stepanov ASAN_WRITE_RANGE(ptr, size) 128996c4f2fa53cce8f9d7b517073f38569460de505Evgeniy Stepanov#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) ASAN_READ_RANGE(ptr, size) 129b527f7de80001569542e3f0ef4c7f4b0cb15cb67Alexander Potapenko#define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \ 130b527f7de80001569542e3f0ef4c7f4b0cb15cb67Alexander Potapenko do { \ 131b527f7de80001569542e3f0ef4c7f4b0cb15cb67Alexander Potapenko if (asan_init_is_running) return REAL(func)(__VA_ARGS__); \ 132b527f7de80001569542e3f0ef4c7f4b0cb15cb67Alexander Potapenko ctx = 0; \ 133b527f7de80001569542e3f0ef4c7f4b0cb15cb67Alexander Potapenko (void) ctx; \ 134b527f7de80001569542e3f0ef4c7f4b0cb15cb67Alexander Potapenko if (SANITIZER_MAC && !asan_inited) return REAL(func)(__VA_ARGS__); \ 135b527f7de80001569542e3f0ef4c7f4b0cb15cb67Alexander Potapenko ENSURE_ASAN_INITED(); \ 1369d1525ec52430d0b8ffd6d0893b7f5529105b321Evgeniy Stepanov } while (false) 1379d1525ec52430d0b8ffd6d0893b7f5529105b321Evgeniy Stepanov#define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) \ 1389d1525ec52430d0b8ffd6d0893b7f5529105b321Evgeniy Stepanov do { \ 1399d1525ec52430d0b8ffd6d0893b7f5529105b321Evgeniy Stepanov } while (false) 1409d1525ec52430d0b8ffd6d0893b7f5529105b321Evgeniy Stepanov#define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd) \ 1419d1525ec52430d0b8ffd6d0893b7f5529105b321Evgeniy Stepanov do { \ 1429d1525ec52430d0b8ffd6d0893b7f5529105b321Evgeniy Stepanov } while (false) 1439d1525ec52430d0b8ffd6d0893b7f5529105b321Evgeniy Stepanov#define COMMON_INTERCEPTOR_FD_SOCKET_ACCEPT(ctx, fd, newfd) \ 1449d1525ec52430d0b8ffd6d0893b7f5529105b321Evgeniy Stepanov do { \ 14582a9080eaff95d69b270cd863e9df63e3b4e59adEvgeniy Stepanov } while (false) 146996c4f2fa53cce8f9d7b517073f38569460de505Evgeniy Stepanov#define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name) SetThreadName(name) 147e767e350b1a6461bc29cfea28af75f908d7da56eDmitry Vyukov// Should be asanThreadRegistry().SetThreadNameByUserId(thread, name) 148e767e350b1a6461bc29cfea28af75f908d7da56eDmitry Vyukov// But asan does not remember UserId's for threads (pthread_t); 149e767e350b1a6461bc29cfea28af75f908d7da56eDmitry Vyukov// and remembers all ever existed threads, so the linear search by UserId 150e767e350b1a6461bc29cfea28af75f908d7da56eDmitry Vyukov// can be slow. 1515cf2c460e96e593b1c772f1b02d3a217f4837fdcDmitry Vyukov#define COMMON_INTERCEPTOR_SET_PTHREAD_NAME(ctx, thread, name) \ 152e767e350b1a6461bc29cfea28af75f908d7da56eDmitry Vyukov do { \ 153e767e350b1a6461bc29cfea28af75f908d7da56eDmitry Vyukov } while (false) 154e18e3f07802c420eb4b2da407e148084b75cecc9Evgeniy Stepanov#define COMMON_INTERCEPTOR_BLOCK_REAL(name) REAL(name) 15514dd980b384ad859099b499e12f320c4791fb674Dmitry Vyukov#define COMMON_INTERCEPTOR_ON_EXIT(ctx) OnExit() 1564f32c0beaa83ffbb84db23d2e6205bee57c39ce1Evgeniy Stepanov#include "sanitizer_common/sanitizer_common_interceptors.inc" 1578530e2b953f0b34ecd267a6aba5f155d5c08c5c8Kostya Serebryany 158881b677c189e65872fd315a75a0e56f077339189Evgeniy Stepanov#define COMMON_SYSCALL_PRE_READ_RANGE(p, s) ASAN_READ_RANGE(p, s) 159881b677c189e65872fd315a75a0e56f077339189Evgeniy Stepanov#define COMMON_SYSCALL_PRE_WRITE_RANGE(p, s) ASAN_WRITE_RANGE(p, s) 160ae4e6fd0300b13812a02a779619b1a451478cdd1Evgeniy Stepanov#define COMMON_SYSCALL_POST_READ_RANGE(p, s) \ 161ae4e6fd0300b13812a02a779619b1a451478cdd1Evgeniy Stepanov do { \ 162dfab31b93e954ee42622a13dd79e9e1092346035Evgeniy Stepanov (void)(p); \ 163dfab31b93e954ee42622a13dd79e9e1092346035Evgeniy Stepanov (void)(s); \ 164ae4e6fd0300b13812a02a779619b1a451478cdd1Evgeniy Stepanov } while (false) 165ae4e6fd0300b13812a02a779619b1a451478cdd1Evgeniy Stepanov#define COMMON_SYSCALL_POST_WRITE_RANGE(p, s) \ 166ae4e6fd0300b13812a02a779619b1a451478cdd1Evgeniy Stepanov do { \ 167dfab31b93e954ee42622a13dd79e9e1092346035Evgeniy Stepanov (void)(p); \ 168dfab31b93e954ee42622a13dd79e9e1092346035Evgeniy Stepanov (void)(s); \ 169ae4e6fd0300b13812a02a779619b1a451478cdd1Evgeniy Stepanov } while (false) 170881b677c189e65872fd315a75a0e56f077339189Evgeniy Stepanov#include "sanitizer_common/sanitizer_common_syscalls.inc" 171881b677c189e65872fd315a75a0e56f077339189Evgeniy Stepanov 172600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanovstatic thread_return_t THREAD_CALLING_CONV asan_thread_start(void *arg) { 1734803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany AsanThread *t = (AsanThread*)arg; 17489c1384464848c1ad041becf8b97936fa10de21bAlexey Samsonov SetCurrentThread(t); 175def1be9b7ef4091ce465c0fbfb26cdb52128ade8Alexey Samsonov return t->ThreadStart(GetTid()); 1764803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 1774803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 178fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT_PTHREAD_CREATE 179b8ef925563f8dde5be837c4b0569082867c5f14cEvgeniy StepanovINTERCEPTOR(int, pthread_create, void *thread, 180b8ef925563f8dde5be837c4b0569082867c5f14cEvgeniy Stepanov void *attr, void *(*start_routine)(void*), void *arg) { 181c6ac98d7fcc81768b2ef7ddc785c27e3fc1bdef6Sergey Matveev EnsureMainThreadIDIsCorrect(); 182bdd0966deb04068ea94cf416c7fb46516013bd26Alexey Samsonov // Strict init-order checking in thread-hostile. 1839465cbdbe73590746b57916f46ea1aa4bf3dd13dAlexey Samsonov if (flags()->strict_init_order) 1849465cbdbe73590746b57916f46ea1aa4bf3dd13dAlexey Samsonov StopInitOrderChecking(); 185a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany GET_STACK_TRACE_THREAD; 186def1be9b7ef4091ce465c0fbfb26cdb52128ade8Alexey Samsonov int detached = 0; 187def1be9b7ef4091ce465c0fbfb26cdb52128ade8Alexey Samsonov if (attr != 0) 188bb6bc9a0ae534ada3c0c2c226462c351c078d761Evgeniy Stepanov REAL(pthread_attr_getdetachstate)(attr, &detached); 189def1be9b7ef4091ce465c0fbfb26cdb52128ade8Alexey Samsonov 19089c1384464848c1ad041becf8b97936fa10de21bAlexey Samsonov u32 current_tid = GetCurrentTidOrInvalid(); 191def1be9b7ef4091ce465c0fbfb26cdb52128ade8Alexey Samsonov AsanThread *t = AsanThread::Create(start_routine, arg); 192def1be9b7ef4091ce465c0fbfb26cdb52128ade8Alexey Samsonov CreateThreadContextArgs args = { t, &stack }; 193def1be9b7ef4091ce465c0fbfb26cdb52128ade8Alexey Samsonov asanThreadRegistry().CreateThread(*(uptr*)t, detached, current_tid, &args); 19409672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(pthread_create)(thread, attr, asan_thread_start, t); 1954803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 196fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#endif // ASAN_INTERCEPT_PTHREAD_CREATE 1974803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 19834a3202a2c22816a6da66959e266a2d078ded37bAlexey Samsonov#if ASAN_INTERCEPT_SIGNAL_AND_SIGACTION 199f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(void*, signal, int signum, void *handler) { 200332bf3340435a85d39d6abefbf4d6a145e17da1cAlexey Samsonov if (!AsanInterceptsSignal(signum) || flags()->allow_user_segv_handler) { 201034bda5eab7cda14fac0bed3a39de4a3dbce3cffAlexander Potapenko return REAL(signal)(signum, handler); 2024803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany } 2033f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany return 0; 2044803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 2054803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 206da13ba833b046553f50b54538e4828287ddbf5c0Alexey SamsonovINTERCEPTOR(int, sigaction, int signum, const struct sigaction *act, 207da13ba833b046553f50b54538e4828287ddbf5c0Alexey Samsonov struct sigaction *oldact) { 208332bf3340435a85d39d6abefbf4d6a145e17da1cAlexey Samsonov if (!AsanInterceptsSignal(signum) || flags()->allow_user_segv_handler) { 209034bda5eab7cda14fac0bed3a39de4a3dbce3cffAlexander Potapenko return REAL(sigaction)(signum, act, oldact); 2104803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany } 211034bda5eab7cda14fac0bed3a39de4a3dbce3cffAlexander Potapenko return 0; 2124803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 213e1ba0009d5be18d513ffd29c1b6fccea1a3bffa0Evgeniy Stepanov#elif SANITIZER_POSIX 21434a3202a2c22816a6da66959e266a2d078ded37bAlexey Samsonov// We need to have defined REAL(sigaction) on posix systems. 21534a3202a2c22816a6da66959e266a2d078ded37bAlexey SamsonovDEFINE_REAL(int, sigaction, int signum, const struct sigaction *act, 216fdde5a97a71b142297d7b2270c2a7f564a37dbaeAlexey Samsonov struct sigaction *oldact) 21734a3202a2c22816a6da66959e266a2d078ded37bAlexey Samsonov#endif // ASAN_INTERCEPT_SIGNAL_AND_SIGACTION 2184803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 2190870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov#if ASAN_INTERCEPT_SWAPCONTEXT 22057db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonovstatic void ClearShadowMemoryForContextStack(uptr stack, uptr ssize) { 22157db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov // Align to page size. 22257db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov uptr PageSize = GetPageSizeCached(); 22357db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov uptr bottom = stack & ~(PageSize - 1); 22457db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov ssize += stack - bottom; 22557db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov ssize = RoundUpTo(ssize, PageSize); 22657db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov static const uptr kMaxSaneContextStackSize = 1 << 22; // 4 Mb 227541cfb10f5daa17e48eb42365a74233cd551c545Kostya Serebryany if (ssize && ssize <= kMaxSaneContextStackSize) { 22857db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov PoisonShadow(bottom, ssize, 0); 22957db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov } 23057db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov} 23157db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov 2320870028410087e67a0049c76cb7c64f02c260d24Alexey SamsonovINTERCEPTOR(int, swapcontext, struct ucontext_t *oucp, 2330870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov struct ucontext_t *ucp) { 2340870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov static bool reported_warning = false; 2350870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov if (!reported_warning) { 2360870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov Report("WARNING: ASan doesn't fully support makecontext/swapcontext " 2370870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov "functions and may produce false positives in some cases!\n"); 2380870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov reported_warning = true; 2390870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov } 2400870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov // Clear shadow memory for new context (it may share stack 2410870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov // with current context). 24257db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov uptr stack, ssize; 24357db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov ReadContextStack(ucp, &stack, &ssize); 24457db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov ClearShadowMemoryForContextStack(stack, ssize); 2450870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov int res = REAL(swapcontext)(oucp, ucp); 2460870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov // swapcontext technically does not return, but program may swap context to 2470870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov // "oucp" later, that would look as if swapcontext() returned 0. 2480870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov // We need to clear shadow for ucp once again, as it may be in arbitrary 2490870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov // state. 25057db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov ClearShadowMemoryForContextStack(stack, ssize); 2510870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov return res; 2520870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov} 25357db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov#endif // ASAN_INTERCEPT_SWAPCONTEXT 2540870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov 255f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(void, longjmp, void *env, int val) { 256f54b1f9b73a6855d77ee270c282bd61407fa73a0Kostya Serebryany __asan_handle_no_return(); 25709672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov REAL(longjmp)(env, val); 2584803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 2594803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 260fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT__LONGJMP 261f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(void, _longjmp, void *env, int val) { 262f54b1f9b73a6855d77ee270c282bd61407fa73a0Kostya Serebryany __asan_handle_no_return(); 26309672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov REAL(_longjmp)(env, val); 2644803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 265fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#endif 2664803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 267fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT_SIGLONGJMP 268f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(void, siglongjmp, void *env, int val) { 269f54b1f9b73a6855d77ee270c282bd61407fa73a0Kostya Serebryany __asan_handle_no_return(); 27009672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov REAL(siglongjmp)(env, val); 2714803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 27207bb9f1e3600195119aec1aae1aa48a6ed2f5febTimur Iskhodzhanov#endif 2734803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 274fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT___CXA_THROW 275f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(void, __cxa_throw, void *a, void *b, void *c) { 27609672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov CHECK(REAL(__cxa_throw)); 277f54b1f9b73a6855d77ee270c282bd61407fa73a0Kostya Serebryany __asan_handle_no_return(); 27809672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov REAL(__cxa_throw)(a, b, c); 2794803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 2804803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany#endif 2814803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 2824803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany// intercept mlock and friends. 2834803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany// Since asan maps 16T of RAM, mlock is completely unfriendly to asan. 2844803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany// All functions return 0 (success). 2854803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryanystatic void MlockIsUnsupported() { 2868d2438a7ebb01201c652f91d1e8043a1f3d03bffTimur Iskhodzhanov static bool printed = false; 2874803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany if (printed) return; 2884803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany printed = true; 2896866dba92ac842fc513ba339ba849a953ffb7507Dmitry Vyukov if (common_flags()->verbosity > 0) { 290eaca82cf249021afa31dbc970278f2f28ea2a1aaTimur Iskhodzhanov Printf("INFO: AddressSanitizer ignores " 291eaca82cf249021afa31dbc970278f2f28ea2a1aaTimur Iskhodzhanov "mlock/mlockall/munlock/munlockall\n"); 292eaca82cf249021afa31dbc970278f2f28ea2a1aaTimur Iskhodzhanov } 2934803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 2943389b8ea81f51a28365a421b2646d594bac490f5Alexey Samsonov 29500f1c091441be5c2cacb99e21bd1965a5e418242Alexander PotapenkoINTERCEPTOR(int, mlock, const void *addr, uptr len) { 2964803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany MlockIsUnsupported(); 2974803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany return 0; 2984803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 2993389b8ea81f51a28365a421b2646d594bac490f5Alexey Samsonov 30000f1c091441be5c2cacb99e21bd1965a5e418242Alexander PotapenkoINTERCEPTOR(int, munlock, const void *addr, uptr len) { 3014803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany MlockIsUnsupported(); 3024803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany return 0; 3034803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 3043389b8ea81f51a28365a421b2646d594bac490f5Alexey Samsonov 30500f1c091441be5c2cacb99e21bd1965a5e418242Alexander PotapenkoINTERCEPTOR(int, mlockall, int flags) { 3064803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany MlockIsUnsupported(); 3074803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany return 0; 3084803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 3093389b8ea81f51a28365a421b2646d594bac490f5Alexey Samsonov 31000f1c091441be5c2cacb99e21bd1965a5e418242Alexander PotapenkoINTERCEPTOR(int, munlockall, void) { 3114803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany MlockIsUnsupported(); 3124803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany return 0; 3134803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 3144803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 31552fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryanystatic inline int CharCmp(unsigned char c1, unsigned char c2) { 31652fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryany return (c1 == c2) ? 0 : (c1 < c2) ? -1 : 1; 31752fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryany} 31852fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryany 3193f4c3875c42078e22c7e5356c5746fd18756d958Kostya SerebryanyINTERCEPTOR(int, memcmp, const void *a1, const void *a2, uptr size) { 32050f2e30497ba2a69ee5721e7235a296d7c13a495Alexander Potapenko if (!asan_inited) return internal_memcmp(a1, a2, size); 32152fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryany ENSURE_ASAN_INITED(); 3221b057b20db71ec6cc2bac460c8b2848f0889d47dKostya Serebryany if (flags()->replace_intrin) { 3238bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko if (flags()->strict_memcmp) { 3248bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko // Check the entire regions even if the first bytes of the buffers are 3258bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko // different. 3268bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko ASAN_READ_RANGE(a1, size); 3278bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko ASAN_READ_RANGE(a2, size); 3288bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko // Fallthrough to REAL(memcmp) below. 3298bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko } else { 3308bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko unsigned char c1 = 0, c2 = 0; 3318bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko const unsigned char *s1 = (const unsigned char*)a1; 3328bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko const unsigned char *s2 = (const unsigned char*)a2; 3338bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko uptr i; 3348bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko for (i = 0; i < size; i++) { 3358bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko c1 = s1[i]; 3368bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko c2 = s2[i]; 3378bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko if (c1 != c2) break; 3388bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko } 3398bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko ASAN_READ_RANGE(s1, Min(i + 1, size)); 3408bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko ASAN_READ_RANGE(s2, Min(i + 1, size)); 3418bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko return CharCmp(c1, c2); 3428bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko } 34352fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryany } 3441b057b20db71ec6cc2bac460c8b2848f0889d47dKostya Serebryany return REAL(memcmp(a1, a2, size)); 34552fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryany} 34652fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryany 347d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko#define MEMMOVE_BODY { \ 348d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko if (!asan_inited) return internal_memmove(to, from, size); \ 349d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko if (asan_init_is_running) { \ 350d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko return REAL(memmove)(to, from, size); \ 351d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko } \ 352d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko ENSURE_ASAN_INITED(); \ 353d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko if (flags()->replace_intrin) { \ 354d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko ASAN_READ_RANGE(from, size); \ 355d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko ASAN_WRITE_RANGE(to, size); \ 356d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko } \ 357d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko return internal_memmove(to, from, size); \ 358d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko} 359d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko 360d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander PotapenkoINTERCEPTOR(void*, memmove, void *to, const void *from, uptr size) MEMMOVE_BODY 361d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko 3623f4c3875c42078e22c7e5356c5746fd18756d958Kostya SerebryanyINTERCEPTOR(void*, memcpy, void *to, const void *from, uptr size) { 363d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko#if !SANITIZER_MAC 36450f2e30497ba2a69ee5721e7235a296d7c13a495Alexander Potapenko if (!asan_inited) return internal_memcpy(to, from, size); 3651e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany // memcpy is called during __asan_init() from the internals 3661e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany // of printf(...). 3671e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany if (asan_init_is_running) { 36809672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(memcpy)(to, from, size); 3691e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 370e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany ENSURE_ASAN_INITED(); 371cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_intrin) { 372c655cfa8dc0fdf5b521e565f6cbdbf7981fba1b2Kostya Serebryany if (to != from) { 373c655cfa8dc0fdf5b521e565f6cbdbf7981fba1b2Kostya Serebryany // We do not treat memcpy with to==from as a bug. 374c655cfa8dc0fdf5b521e565f6cbdbf7981fba1b2Kostya Serebryany // See http://llvm.org/bugs/show_bug.cgi?id=11763. 375c655cfa8dc0fdf5b521e565f6cbdbf7981fba1b2Kostya Serebryany CHECK_RANGES_OVERLAP("memcpy", to, size, from, size); 376c655cfa8dc0fdf5b521e565f6cbdbf7981fba1b2Kostya Serebryany } 377c75d8483e27528349620ccf4e997a72029a7ea17Alexander Potapenko ASAN_READ_RANGE(from, size); 378c75d8483e27528349620ccf4e997a72029a7ea17Alexander Potapenko ASAN_WRITE_RANGE(to, size); 3791e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 380d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko // Interposing of resolver functions is broken on Mac OS 10.7 and 10.8, so 381d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko // calling REAL(memcpy) here leads to infinite recursion. 382f1673e61768cb08d488a75584b61bfdf24ffdac1Alexander Potapenko // See also http://code.google.com/p/address-sanitizer/issues/detail?id=116. 383f1673e61768cb08d488a75584b61bfdf24ffdac1Alexander Potapenko return internal_memcpy(to, from, size); 384d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko#else 385d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko // At least on 10.7 and 10.8 both memcpy() and memmove() are being replaced 386d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko // with WRAP(memcpy). As a result, false positives are reported for memmove() 387d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko // calls. If we just disable error reporting with 388d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko // ASAN_OPTIONS=replace_intrin=0, memmove() is still replaced with 389d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko // internal_memcpy(), which may lead to crashes, see 390d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko // http://llvm.org/bugs/show_bug.cgi?id=16362. 391d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko MEMMOVE_BODY 392d4d7040ee026ab04502c42327ed5081f704a8e3cAlexander Potapenko#endif // !SANITIZER_MAC 3931e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 3941e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 3953f4c3875c42078e22c7e5356c5746fd18756d958Kostya SerebryanyINTERCEPTOR(void*, memset, void *block, int c, uptr size) { 39650f2e30497ba2a69ee5721e7235a296d7c13a495Alexander Potapenko if (!asan_inited) return internal_memset(block, c, size); 397ebb9702cff96192c6a6ea963037929ca7ed60eaeAlexander Potapenko // memset is called inside Printf. 398e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany if (asan_init_is_running) { 39909672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(memset)(block, c, size); 400e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany } 401e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany ENSURE_ASAN_INITED(); 402cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_intrin) { 4031e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany ASAN_WRITE_RANGE(block, size); 4041e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 40509672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(memset)(block, c, size); 4061e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 4071e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 408f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(char*, strchr, const char *str, int c) { 40950f2e30497ba2a69ee5721e7235a296d7c13a495Alexander Potapenko if (!asan_inited) return internal_strchr(str, c); 4108d6e3f7d011970e35dadf831964260bcf6a4d8a9Alexander Potapenko // strchr is called inside create_purgeable_zone() when MallocGuardEdges=1 is 4118d6e3f7d011970e35dadf831964260bcf6a4d8a9Alexander Potapenko // used. 4128d6e3f7d011970e35dadf831964260bcf6a4d8a9Alexander Potapenko if (asan_init_is_running) { 4138d6e3f7d011970e35dadf831964260bcf6a4d8a9Alexander Potapenko return REAL(strchr)(str, c); 4148d6e3f7d011970e35dadf831964260bcf6a4d8a9Alexander Potapenko } 415e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany ENSURE_ASAN_INITED(); 41609672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov char *result = REAL(strchr)(str, c); 417cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_str) { 4183f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany uptr bytes_read = (result ? result - str : REAL(strlen)(str)) + 1; 4191e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany ASAN_READ_RANGE(str, bytes_read); 4201e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 4211e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany return result; 4221e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 4231e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 424fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT_INDEX 425fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov# if ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX 4264b0c5f240e71be4f375627e57d0f1b89600918a7Evgeniy StepanovINTERCEPTOR(char*, index, const char *string, int c) 42772bbfd4f3a442afde281476bc6bd41b3b2152a4eAlexander Potapenko ALIAS(WRAPPER_NAME(strchr)); 428fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov# else 42924e13723f8477d8c42ab8b2a7f4f69fc089842f1Evgeniy Stepanov# if SANITIZER_MAC 43050a002ecad3f0a10c136496e5b6289bd3c71590eAlexander PotapenkoDECLARE_REAL(char*, index, const char *string, int c) 43150a002ecad3f0a10c136496e5b6289bd3c71590eAlexander PotapenkoOVERRIDE_FUNCTION(index, strchr); 43250a002ecad3f0a10c136496e5b6289bd3c71590eAlexander Potapenko# else 433fdde5a97a71b142297d7b2270c2a7f564a37dbaeAlexey SamsonovDEFINE_REAL(char*, index, const char *string, int c) 43450a002ecad3f0a10c136496e5b6289bd3c71590eAlexander Potapenko# endif 435fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov# endif 436fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#endif // ASAN_INTERCEPT_INDEX 437af0f01d77c2a495f023ffbf6cce85b33bbd2306dKostya Serebryany 43837b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko// For both strcat() and strncat() we need to check the validity of |to| 43937b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko// argument irrespective of the |from| length. 440f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(char*, strcat, char *to, const char *from) { // NOLINT 4410985ca240812ac5519168a6aecbccf4c513ae243Kostya Serebryany ENSURE_ASAN_INITED(); 442cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_str) { 4433f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany uptr from_length = REAL(strlen)(from); 4440985ca240812ac5519168a6aecbccf4c513ae243Kostya Serebryany ASAN_READ_RANGE(from, from_length + 1); 44537b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko uptr to_length = REAL(strlen)(to); 44637b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko ASAN_READ_RANGE(to, to_length); 44737b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko ASAN_WRITE_RANGE(to + to_length, from_length + 1); 44837b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko // If the copying actually happens, the |from| string should not overlap 44937b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko // with the resulting string starting at |to|, which has a length of 45037b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko // to_length + from_length + 1. 4510985ca240812ac5519168a6aecbccf4c513ae243Kostya Serebryany if (from_length > 0) { 45237b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko CHECK_RANGES_OVERLAP("strcat", to, from_length + to_length + 1, 45337b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko from, from_length + 1); 4540985ca240812ac5519168a6aecbccf4c513ae243Kostya Serebryany } 4550985ca240812ac5519168a6aecbccf4c513ae243Kostya Serebryany } 45609672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(strcat)(to, from); // NOLINT 4570985ca240812ac5519168a6aecbccf4c513ae243Kostya Serebryany} 4580985ca240812ac5519168a6aecbccf4c513ae243Kostya Serebryany 459c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey SamsonovINTERCEPTOR(char*, strncat, char *to, const char *from, uptr size) { 460c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov ENSURE_ASAN_INITED(); 46137b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko if (flags()->replace_str) { 462c925697df6626bb0ea27ea96539bf0580f8f3d3dAlexey Samsonov uptr from_length = MaybeRealStrnlen(from, size); 46337b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko uptr copy_length = Min(size, from_length + 1); 46437b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko ASAN_READ_RANGE(from, copy_length); 465c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov uptr to_length = REAL(strlen)(to); 466c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov ASAN_READ_RANGE(to, to_length); 467c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov ASAN_WRITE_RANGE(to + to_length, from_length + 1); 468c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov if (from_length > 0) { 46937b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko CHECK_RANGES_OVERLAP("strncat", to, to_length + copy_length + 1, 47037b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko from, copy_length); 471c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov } 472c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov } 473c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov return REAL(strncat)(to, from, size); 474c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov} 475c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov 476f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(char*, strcpy, char *to, const char *from) { // NOLINT 47724e13723f8477d8c42ab8b2a7f4f69fc089842f1Evgeniy Stepanov#if SANITIZER_MAC 478beda44f87166f91dbeef3d174d77395653bead4dAlexander Potapenko if (!asan_inited) return REAL(strcpy)(to, from); // NOLINT 4790ef531054fc25c11e372cbab1384f10954984219Alexander Potapenko#endif 4801e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany // strcpy is called from malloc_default_purgeable_zone() 4811e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany // in __asan::ReplaceSystemAlloc() on Mac. 4821e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany if (asan_init_is_running) { 48309672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(strcpy)(to, from); // NOLINT 4841e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 485e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany ENSURE_ASAN_INITED(); 486cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_str) { 4873f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany uptr from_size = REAL(strlen)(from) + 1; 488c5e72a3b7c60f1b2d9d9be3a07d397d5b5f872beKostya Serebryany CHECK_RANGES_OVERLAP("strcpy", to, from_size, from, from_size); 4891e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany ASAN_READ_RANGE(from, from_size); 4901e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany ASAN_WRITE_RANGE(to, from_size); 4911e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 49209672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(strcpy)(to, from); // NOLINT 4931e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 4941e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 495fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT_STRDUP 496f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(char*, strdup, const char *s) { 49750f2e30497ba2a69ee5721e7235a296d7c13a495Alexander Potapenko if (!asan_inited) return internal_strdup(s); 498e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany ENSURE_ASAN_INITED(); 499d530d892b4958a9ae54e57472d5d0a0bae1f6ad8Alexey Samsonov uptr length = REAL(strlen)(s); 500cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_str) { 5011e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany ASAN_READ_RANGE(s, length + 1); 5021e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 503d530d892b4958a9ae54e57472d5d0a0bae1f6ad8Alexey Samsonov GET_STACK_TRACE_MALLOC; 504d530d892b4958a9ae54e57472d5d0a0bae1f6ad8Alexey Samsonov void *new_mem = asan_malloc(length + 1, &stack); 505d530d892b4958a9ae54e57472d5d0a0bae1f6ad8Alexey Samsonov REAL(memcpy)(new_mem, s, length + 1); 506d530d892b4958a9ae54e57472d5d0a0bae1f6ad8Alexey Samsonov return reinterpret_cast<char*>(new_mem); 5071e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 508fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#endif 5091e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 5103f4c3875c42078e22c7e5356c5746fd18756d958Kostya SerebryanyINTERCEPTOR(uptr, strlen, const char *s) { 51150f2e30497ba2a69ee5721e7235a296d7c13a495Alexander Potapenko if (!asan_inited) return internal_strlen(s); 5121e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany // strlen is called from malloc_default_purgeable_zone() 5131e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany // in __asan::ReplaceSystemAlloc() on Mac. 5141e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany if (asan_init_is_running) { 51509672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(strlen)(s); 5161e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 517e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany ENSURE_ASAN_INITED(); 5183f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany uptr length = REAL(strlen)(s); 519cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_str) { 5201e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany ASAN_READ_RANGE(s, length + 1); 5211e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 5221e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany return length; 5231e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 5241e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 525b99228de65b408b0acd9618b92774fb8add7e482Reid KlecknerINTERCEPTOR(uptr, wcslen, const wchar_t *s) { 526b99228de65b408b0acd9618b92774fb8add7e482Reid Kleckner uptr length = REAL(wcslen)(s); 527b99228de65b408b0acd9618b92774fb8add7e482Reid Kleckner if (!asan_init_is_running) { 528b99228de65b408b0acd9618b92774fb8add7e482Reid Kleckner ENSURE_ASAN_INITED(); 529b99228de65b408b0acd9618b92774fb8add7e482Reid Kleckner ASAN_READ_RANGE(s, (length + 1) * sizeof(wchar_t)); 530b99228de65b408b0acd9618b92774fb8add7e482Reid Kleckner } 531b99228de65b408b0acd9618b92774fb8add7e482Reid Kleckner return length; 532b99228de65b408b0acd9618b92774fb8add7e482Reid Kleckner} 533b99228de65b408b0acd9618b92774fb8add7e482Reid Kleckner 5343f4c3875c42078e22c7e5356c5746fd18756d958Kostya SerebryanyINTERCEPTOR(char*, strncpy, char *to, const char *from, uptr size) { 535e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany ENSURE_ASAN_INITED(); 536cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_str) { 537c925697df6626bb0ea27ea96539bf0580f8f3d3dAlexey Samsonov uptr from_size = Min(size, MaybeRealStrnlen(from, size) + 1); 538c5e72a3b7c60f1b2d9d9be3a07d397d5b5f872beKostya Serebryany CHECK_RANGES_OVERLAP("strncpy", to, from_size, from, from_size); 5391e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany ASAN_READ_RANGE(from, from_size); 5401e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany ASAN_WRITE_RANGE(to, size); 5411e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 54209672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(strncpy)(to, from, size); 5431e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 5441e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 54581a7a4ab53c94e76c3b131d6f0ed82894640900bAlexey Samsonov#if ASAN_INTERCEPT_STRNLEN 5463f4c3875c42078e22c7e5356c5746fd18756d958Kostya SerebryanyINTERCEPTOR(uptr, strnlen, const char *s, uptr maxlen) { 547e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany ENSURE_ASAN_INITED(); 5483f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany uptr length = REAL(strnlen)(s, maxlen); 549cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_str) { 5502d8b3bdb112ebb8ed3f15ee41d4cebcd683b41b0Kostya Serebryany ASAN_READ_RANGE(s, Min(length + 1, maxlen)); 5511e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 5521e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany return length; 5531e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 55481a7a4ab53c94e76c3b131d6f0ed82894640900bAlexey Samsonov#endif // ASAN_INTERCEPT_STRNLEN 555547652c45fd7f7497dd214ec8ec6b6ee0f80359dKostya Serebryany 5568f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonovstatic inline bool IsValidStrtolBase(int base) { 5578f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov return (base == 0) || (2 <= base && base <= 36); 5588f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov} 5598f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov 5608f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonovstatic inline void FixRealStrtolEndptr(const char *nptr, char **endptr) { 561a27bdf70ca24202dce21cf7c1a387aeaa400d889Kostya Serebryany CHECK(endptr); 5628f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov if (nptr == *endptr) { 5638f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov // No digits were found at strtol call, we need to find out the last 5648f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov // symbol accessed by strtoll on our own. 5658f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov // We get this symbol by skipping leading blanks and optional +/- sign. 5668f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov while (IsSpace(*nptr)) nptr++; 5678f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov if (*nptr == '+' || *nptr == '-') nptr++; 5688f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov *endptr = (char*)nptr; 5698f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov } 5708f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov CHECK(*endptr >= nptr); 57184ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov} 57284ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov 573847f932ab0405757946433b81d3b2952b306b0bcAlexey SamsonovINTERCEPTOR(long, strtol, const char *nptr, // NOLINT 57484ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov char **endptr, int base) { 57584ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov ENSURE_ASAN_INITED(); 576cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (!flags()->replace_str) { 577847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov return REAL(strtol)(nptr, endptr, base); 57884ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov } 57984ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov char *real_endptr; 580847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov long result = REAL(strtol)(nptr, &real_endptr, base); // NOLINT 5813f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany if (endptr != 0) { 58284ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov *endptr = real_endptr; 58384ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov } 5848f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov if (IsValidStrtolBase(base)) { 5858f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov FixRealStrtolEndptr(nptr, &real_endptr); 58684ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov ASAN_READ_RANGE(nptr, (real_endptr - nptr) + 1); 58784ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov } 58884ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov return result; 58984ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov} 59084ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov 591847f932ab0405757946433b81d3b2952b306b0bcAlexey SamsonovINTERCEPTOR(int, atoi, const char *nptr) { 59224e13723f8477d8c42ab8b2a7f4f69fc089842f1Evgeniy Stepanov#if SANITIZER_MAC 5930ef531054fc25c11e372cbab1384f10954984219Alexander Potapenko if (!asan_inited) return REAL(atoi)(nptr); 5940ef531054fc25c11e372cbab1384f10954984219Alexander Potapenko#endif 595847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov ENSURE_ASAN_INITED(); 596cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (!flags()->replace_str) { 597847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov return REAL(atoi)(nptr); 598847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov } 599847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov char *real_endptr; 600847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov // "man atoi" tells that behavior of atoi(nptr) is the same as 6013f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany // strtol(nptr, 0, 10), i.e. it sets errno to ERANGE if the 602847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov // parsed integer can't be stored in *long* type (even if it's 603847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov // different from int). So, we just imitate this behavior. 604847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov int result = REAL(strtol)(nptr, &real_endptr, 10); 605847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov FixRealStrtolEndptr(nptr, &real_endptr); 606847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov ASAN_READ_RANGE(nptr, (real_endptr - nptr) + 1); 607847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov return result; 608847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov} 609847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov 610847f932ab0405757946433b81d3b2952b306b0bcAlexey SamsonovINTERCEPTOR(long, atol, const char *nptr) { // NOLINT 61124e13723f8477d8c42ab8b2a7f4f69fc089842f1Evgeniy Stepanov#if SANITIZER_MAC 6120ef531054fc25c11e372cbab1384f10954984219Alexander Potapenko if (!asan_inited) return REAL(atol)(nptr); 6130ef531054fc25c11e372cbab1384f10954984219Alexander Potapenko#endif 614847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov ENSURE_ASAN_INITED(); 615cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (!flags()->replace_str) { 616847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov return REAL(atol)(nptr); 617847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov } 618847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov char *real_endptr; 619847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov long result = REAL(strtol)(nptr, &real_endptr, 10); // NOLINT 620847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov FixRealStrtolEndptr(nptr, &real_endptr); 621847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov ASAN_READ_RANGE(nptr, (real_endptr - nptr) + 1); 622847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov return result; 623847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov} 624847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov 625847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov#if ASAN_INTERCEPT_ATOLL_AND_STRTOLL 626847f932ab0405757946433b81d3b2952b306b0bcAlexey SamsonovINTERCEPTOR(long long, strtoll, const char *nptr, // NOLINT 6278f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov char **endptr, int base) { 6288f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov ENSURE_ASAN_INITED(); 629cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (!flags()->replace_str) { 630847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov return REAL(strtoll)(nptr, endptr, base); 6318f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov } 6328f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov char *real_endptr; 633847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov long long result = REAL(strtoll)(nptr, &real_endptr, base); // NOLINT 6343f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany if (endptr != 0) { 6358f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov *endptr = real_endptr; 6368f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov } 637847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov // If base has unsupported value, strtoll can exit with EINVAL 638847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov // without reading any characters. So do additional checks only 639847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov // if base is valid. 6408f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov if (IsValidStrtolBase(base)) { 6418f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov FixRealStrtolEndptr(nptr, &real_endptr); 6428f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov ASAN_READ_RANGE(nptr, (real_endptr - nptr) + 1); 6438f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov } 6448f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov return result; 6458f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov} 6468f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov 647847f932ab0405757946433b81d3b2952b306b0bcAlexey SamsonovINTERCEPTOR(long long, atoll, const char *nptr) { // NOLINT 648847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov ENSURE_ASAN_INITED(); 649cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (!flags()->replace_str) { 650847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov return REAL(atoll)(nptr); 651847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov } 652847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov char *real_endptr; 653847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov long long result = REAL(strtoll)(nptr, &real_endptr, 10); // NOLINT 654847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov FixRealStrtolEndptr(nptr, &real_endptr); 655847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov ASAN_READ_RANGE(nptr, (real_endptr - nptr) + 1); 656847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov return result; 657847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov} 658847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov#endif // ASAN_INTERCEPT_ATOLL_AND_STRTOLL 659847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov 66046efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonovstatic void AtCxaAtexit(void *unused) { 66146efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonov (void)unused; 66246efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonov StopInitOrderChecking(); 66346efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonov} 66446efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonov 66546efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonov#if ASAN_INTERCEPT___CXA_ATEXIT 66646efcb09dc16b91cb805abea52f3ff6081a63751Alexey SamsonovINTERCEPTOR(int, __cxa_atexit, void (*func)(void *), void *arg, 66746efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonov void *dso_handle) { 668b527f7de80001569542e3f0ef4c7f4b0cb15cb67Alexander Potapenko#if SANITIZER_MAC 669b527f7de80001569542e3f0ef4c7f4b0cb15cb67Alexander Potapenko if (!asan_inited) return REAL(__cxa_atexit)(func, arg, dso_handle); 670b527f7de80001569542e3f0ef4c7f4b0cb15cb67Alexander Potapenko#endif 67146efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonov ENSURE_ASAN_INITED(); 67246efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonov int res = REAL(__cxa_atexit)(func, arg, dso_handle); 67346efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonov REAL(__cxa_atexit)(AtCxaAtexit, 0, 0); 67446efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonov return res; 67546efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonov} 67646efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonov#endif // ASAN_INTERCEPT___CXA_ATEXIT 67746efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonov 67824e13723f8477d8c42ab8b2a7f4f69fc089842f1Evgeniy Stepanov#if SANITIZER_WINDOWS 679600972e3427173cc8904d741decd1af0ed5de9fdTimur IskhodzhanovINTERCEPTOR_WINAPI(DWORD, CreateThread, 6803f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany void* security, uptr stack_size, 681600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov DWORD (__stdcall *start_routine)(void*), void* arg, 682b9a928497168e177791f10f5042ff6f5e4e8a881Alexey Samsonov DWORD thr_flags, void* tid) { 683bdd0966deb04068ea94cf416c7fb46516013bd26Alexey Samsonov // Strict init-order checking in thread-hostile. 6849465cbdbe73590746b57916f46ea1aa4bf3dd13dAlexey Samsonov if (flags()->strict_init_order) 6859465cbdbe73590746b57916f46ea1aa4bf3dd13dAlexey Samsonov StopInitOrderChecking(); 686a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany GET_STACK_TRACE_THREAD; 68789c1384464848c1ad041becf8b97936fa10de21bAlexey Samsonov u32 current_tid = GetCurrentTidOrInvalid(); 688dfe3f9691d4700981566a4b57e1e482f72783950Alexey Samsonov AsanThread *t = AsanThread::Create(start_routine, arg); 689dfe3f9691d4700981566a4b57e1e482f72783950Alexey Samsonov CreateThreadContextArgs args = { t, &stack }; 6908d2438a7ebb01201c652f91d1e8043a1f3d03bffTimur Iskhodzhanov bool detached = false; // FIXME: how can we determine it on Windows? 691dfe3f9691d4700981566a4b57e1e482f72783950Alexey Samsonov asanThreadRegistry().CreateThread(*(uptr*)t, detached, current_tid, &args); 692600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov return REAL(CreateThread)(security, stack_size, 693b9a928497168e177791f10f5042ff6f5e4e8a881Alexey Samsonov asan_thread_start, t, thr_flags, tid); 694600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov} 695600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov 696600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanovnamespace __asan { 697600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanovvoid InitializeWindowsInterceptors() { 698580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(CreateThread); 699600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov} 700600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov 701600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov} // namespace __asan 702600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov#endif 703600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov 704547652c45fd7f7497dd214ec8ec6b6ee0f80359dKostya Serebryany// ---------------------- InitializeAsanInterceptors ---------------- {{{1 705547652c45fd7f7497dd214ec8ec6b6ee0f80359dKostya Serebryanynamespace __asan { 706547652c45fd7f7497dd214ec8ec6b6ee0f80359dKostya Serebryanyvoid InitializeAsanInterceptors() { 707fdbdab5ff8de4c23b58bb411ea2358a78e2d9b2fKostya Serebryany static bool was_called_once; 708fdbdab5ff8de4c23b58bb411ea2358a78e2d9b2fKostya Serebryany CHECK(was_called_once == false); 709fdbdab5ff8de4c23b58bb411ea2358a78e2d9b2fKostya Serebryany was_called_once = true; 7108530e2b953f0b34ecd267a6aba5f155d5c08c5c8Kostya Serebryany SANITIZER_COMMON_INTERCEPTORS_INIT; 7118530e2b953f0b34ecd267a6aba5f155d5c08c5c8Kostya Serebryany 71207bb9f1e3600195119aec1aae1aa48a6ed2f5febTimur Iskhodzhanov // Intercept mem* functions. 713580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(memcmp); 714580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(memmove); 715580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(memset); 71638dd4ed885e714c376466f6fe0d69f5f22d37014Alexey Samsonov if (PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE) { 717580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(memcpy); 718573fb4b102dda9d231a8dbd0c01e67e84e9b0874Alexander Potapenko } 71907bb9f1e3600195119aec1aae1aa48a6ed2f5febTimur Iskhodzhanov 72007bb9f1e3600195119aec1aae1aa48a6ed2f5febTimur Iskhodzhanov // Intercept str* functions. 721580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(strcat); // NOLINT 722580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(strchr); 723580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(strcpy); // NOLINT 724580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(strlen); 725b99228de65b408b0acd9618b92774fb8add7e482Reid Kleckner ASAN_INTERCEPT_FUNC(wcslen); 726c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov ASAN_INTERCEPT_FUNC(strncat); 727580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(strncpy); 728fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT_STRDUP 729fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov ASAN_INTERCEPT_FUNC(strdup); 730fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#endif 731fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT_STRNLEN 732fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov ASAN_INTERCEPT_FUNC(strnlen); 733fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#endif 73469563986ca570ce750111a82264d51ddbf4107baAlexander Potapenko#if ASAN_INTERCEPT_INDEX && ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX 735580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(index); 73607bb9f1e3600195119aec1aae1aa48a6ed2f5febTimur Iskhodzhanov#endif 7375b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov 738580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(atoi); 739580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(atol); 740580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(strtol); 741847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov#if ASAN_INTERCEPT_ATOLL_AND_STRTOLL 742580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(atoll); 743580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(strtoll); 74484ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov#endif 74584ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov 746f0c6de3d91ba5cdfbb17a630e823523c7d433160Alexander Potapenko#if ASAN_INTERCEPT_MLOCKX 74700f1c091441be5c2cacb99e21bd1965a5e418242Alexander Potapenko // Intercept mlock/munlock. 74800f1c091441be5c2cacb99e21bd1965a5e418242Alexander Potapenko ASAN_INTERCEPT_FUNC(mlock); 74900f1c091441be5c2cacb99e21bd1965a5e418242Alexander Potapenko ASAN_INTERCEPT_FUNC(munlock); 75000f1c091441be5c2cacb99e21bd1965a5e418242Alexander Potapenko ASAN_INTERCEPT_FUNC(mlockall); 75100f1c091441be5c2cacb99e21bd1965a5e418242Alexander Potapenko ASAN_INTERCEPT_FUNC(munlockall); 752f0c6de3d91ba5cdfbb17a630e823523c7d433160Alexander Potapenko#endif 75300f1c091441be5c2cacb99e21bd1965a5e418242Alexander Potapenko 75407bb9f1e3600195119aec1aae1aa48a6ed2f5febTimur Iskhodzhanov // Intecept signal- and jump-related functions. 755580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(longjmp); 75634a3202a2c22816a6da66959e266a2d078ded37bAlexey Samsonov#if ASAN_INTERCEPT_SIGNAL_AND_SIGACTION 757580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(sigaction); 758580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(signal); 759919c24787a655597bdcf367e26c9dd1504e9f463Evgeniy Stepanov#endif 7600870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov#if ASAN_INTERCEPT_SWAPCONTEXT 7610870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov ASAN_INTERCEPT_FUNC(swapcontext); 7620870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov#endif 763fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT__LONGJMP 764580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(_longjmp); 765fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#endif 766fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT_SIGLONGJMP 767580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(siglongjmp); 768fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#endif 769fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov 770fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov // Intercept exception handling functions. 771fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT___CXA_THROW 772fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov INTERCEPT_FUNCTION(__cxa_throw); 7733e81fe43798c096d1d3565596f0717b9919de4fbTimur Iskhodzhanov#endif 7743e81fe43798c096d1d3565596f0717b9919de4fbTimur Iskhodzhanov 77507bb9f1e3600195119aec1aae1aa48a6ed2f5febTimur Iskhodzhanov // Intercept threading-related functions 776fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT_PTHREAD_CREATE 777580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(pthread_create); 77807bb9f1e3600195119aec1aae1aa48a6ed2f5febTimur Iskhodzhanov#endif 77907bb9f1e3600195119aec1aae1aa48a6ed2f5febTimur Iskhodzhanov 78046efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonov // Intercept atexit function. 78146efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonov#if ASAN_INTERCEPT___CXA_ATEXIT 78246efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonov ASAN_INTERCEPT_FUNC(__cxa_atexit); 78346efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonov#endif 78446efcb09dc16b91cb805abea52f3ff6081a63751Alexey Samsonov 785600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov // Some Windows-specific interceptors. 78624e13723f8477d8c42ab8b2a7f4f69fc089842f1Evgeniy Stepanov#if SANITIZER_WINDOWS 787600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov InitializeWindowsInterceptors(); 788600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov#endif 789600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov 7906866dba92ac842fc513ba339ba849a953ffb7507Dmitry Vyukov if (common_flags()->verbosity > 0) { 7912962f26071ebef1d5fec52b5569e5ae7aae45c9bAlexander Potapenko Report("AddressSanitizer: libc interceptors initialized\n"); 792547652c45fd7f7497dd214ec8ec6b6ee0f80359dKostya Serebryany } 793547652c45fd7f7497dd214ec8ec6b6ee0f80359dKostya Serebryany} 794547652c45fd7f7497dd214ec8ec6b6ee0f80359dKostya Serebryany 795547652c45fd7f7497dd214ec8ec6b6ee0f80359dKostya Serebryany} // namespace __asan 796