asan_interceptors.cc revision e1ba0009d5be18d513ffd29c1b6fccea1a3bffa0
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" 20487fee7f6f7497906a00d7d2fe2c75e6d5d4feb1Alexey Samsonov#include "asan_report.h" 211e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany#include "asan_stack.h" 221e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany#include "asan_stats.h" 234803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany#include "asan_thread_registry.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) 56eb2809311c94b73c269ccef8d68ae368642e5754Kostya Serebryany#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) { 92c20b321d49f0eff60f1394d56e623d8ca94f24d7Kostya Serebryany AsanThread *t = asanThreadRegistry().GetCurrent(); 93c20b321d49f0eff60f1394d56e623d8ca94f24d7Kostya Serebryany if (t) 94c20b321d49f0eff60f1394d56e623d8ca94f24d7Kostya Serebryany t->summary()->set_name(name); 95c20b321d49f0eff60f1394d56e623d8ca94f24d7Kostya Serebryany} 96c20b321d49f0eff60f1394d56e623d8ca94f24d7Kostya Serebryany 971e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} // namespace __asan 981e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 991e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// ---------------------- Wrappers ---------------- {{{1 1001e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryanyusing namespace __asan; // NOLINT 1011e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 10282a9080eaff95d69b270cd863e9df63e3b4e59adEvgeniy Stepanov#define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \ 10382a9080eaff95d69b270cd863e9df63e3b4e59adEvgeniy Stepanov ASAN_WRITE_RANGE(ptr, size) 104996c4f2fa53cce8f9d7b517073f38569460de505Evgeniy Stepanov#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) ASAN_READ_RANGE(ptr, size) 105bee7415a86d9437659d09f034c346794bf15c2abEvgeniy Stepanov#define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \ 10682a9080eaff95d69b270cd863e9df63e3b4e59adEvgeniy Stepanov do { \ 10782a9080eaff95d69b270cd863e9df63e3b4e59adEvgeniy Stepanov ctx = 0; \ 10882a9080eaff95d69b270cd863e9df63e3b4e59adEvgeniy Stepanov (void)ctx; \ 10982a9080eaff95d69b270cd863e9df63e3b4e59adEvgeniy Stepanov ENSURE_ASAN_INITED(); \ 11082a9080eaff95d69b270cd863e9df63e3b4e59adEvgeniy Stepanov } while (false) 111996c4f2fa53cce8f9d7b517073f38569460de505Evgeniy Stepanov#define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) do { } while (false) 112996c4f2fa53cce8f9d7b517073f38569460de505Evgeniy Stepanov#define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd) do { } while (false) 113996c4f2fa53cce8f9d7b517073f38569460de505Evgeniy Stepanov#define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name) SetThreadName(name) 1144f32c0beaa83ffbb84db23d2e6205bee57c39ce1Evgeniy Stepanov#include "sanitizer_common/sanitizer_common_interceptors.inc" 1158530e2b953f0b34ecd267a6aba5f155d5c08c5c8Kostya Serebryany 116600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanovstatic thread_return_t THREAD_CALLING_CONV asan_thread_start(void *arg) { 1174803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany AsanThread *t = (AsanThread*)arg; 1184803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany asanThreadRegistry().SetCurrent(t); 1194803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany return t->ThreadStart(); 1204803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 1214803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 122fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT_PTHREAD_CREATE 123b8ef925563f8dde5be837c4b0569082867c5f14cEvgeniy StepanovINTERCEPTOR(int, pthread_create, void *thread, 124b8ef925563f8dde5be837c4b0569082867c5f14cEvgeniy Stepanov void *attr, void *(*start_routine)(void*), void *arg) { 125a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany GET_STACK_TRACE_THREAD; 126e0cff0bc20ae51790c8edfbceb817e18ebf5355eKostya Serebryany u32 current_tid = asanThreadRegistry().GetCurrentTidOrInvalid(); 12755cdfc6c5af92560bc0623b5a0d70af71511c3c8Alexey Samsonov AsanThread *t = AsanThread::Create(current_tid, start_routine, arg, &stack); 12855cdfc6c5af92560bc0623b5a0d70af71511c3c8Alexey Samsonov asanThreadRegistry().RegisterThread(t); 12909672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(pthread_create)(thread, attr, asan_thread_start, t); 1304803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 131fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#endif // ASAN_INTERCEPT_PTHREAD_CREATE 1324803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 13334a3202a2c22816a6da66959e266a2d078ded37bAlexey Samsonov#if ASAN_INTERCEPT_SIGNAL_AND_SIGACTION 134f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(void*, signal, int signum, void *handler) { 135034bda5eab7cda14fac0bed3a39de4a3dbce3cffAlexander Potapenko if (!AsanInterceptsSignal(signum)) { 136034bda5eab7cda14fac0bed3a39de4a3dbce3cffAlexander Potapenko return REAL(signal)(signum, handler); 1374803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany } 1383f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany return 0; 1394803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 1404803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 141da13ba833b046553f50b54538e4828287ddbf5c0Alexey SamsonovINTERCEPTOR(int, sigaction, int signum, const struct sigaction *act, 142da13ba833b046553f50b54538e4828287ddbf5c0Alexey Samsonov struct sigaction *oldact) { 143034bda5eab7cda14fac0bed3a39de4a3dbce3cffAlexander Potapenko if (!AsanInterceptsSignal(signum)) { 144034bda5eab7cda14fac0bed3a39de4a3dbce3cffAlexander Potapenko return REAL(sigaction)(signum, act, oldact); 1454803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany } 146034bda5eab7cda14fac0bed3a39de4a3dbce3cffAlexander Potapenko return 0; 1474803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 148e1ba0009d5be18d513ffd29c1b6fccea1a3bffa0Evgeniy Stepanov#elif SANITIZER_POSIX 14934a3202a2c22816a6da66959e266a2d078ded37bAlexey Samsonov// We need to have defined REAL(sigaction) on posix systems. 15034a3202a2c22816a6da66959e266a2d078ded37bAlexey SamsonovDEFINE_REAL(int, sigaction, int signum, const struct sigaction *act, 15134a3202a2c22816a6da66959e266a2d078ded37bAlexey Samsonov struct sigaction *oldact); 15234a3202a2c22816a6da66959e266a2d078ded37bAlexey Samsonov#endif // ASAN_INTERCEPT_SIGNAL_AND_SIGACTION 1534803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 1540870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov#if ASAN_INTERCEPT_SWAPCONTEXT 15557db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonovstatic void ClearShadowMemoryForContextStack(uptr stack, uptr ssize) { 15657db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov // Align to page size. 15757db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov uptr PageSize = GetPageSizeCached(); 15857db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov uptr bottom = stack & ~(PageSize - 1); 15957db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov ssize += stack - bottom; 16057db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov ssize = RoundUpTo(ssize, PageSize); 16157db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov static const uptr kMaxSaneContextStackSize = 1 << 22; // 4 Mb 162541cfb10f5daa17e48eb42365a74233cd551c545Kostya Serebryany if (ssize && ssize <= kMaxSaneContextStackSize) { 16357db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov PoisonShadow(bottom, ssize, 0); 16457db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov } 16557db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov} 16657db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov 1670870028410087e67a0049c76cb7c64f02c260d24Alexey SamsonovINTERCEPTOR(int, swapcontext, struct ucontext_t *oucp, 1680870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov struct ucontext_t *ucp) { 1690870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov static bool reported_warning = false; 1700870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov if (!reported_warning) { 1710870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov Report("WARNING: ASan doesn't fully support makecontext/swapcontext " 1720870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov "functions and may produce false positives in some cases!\n"); 1730870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov reported_warning = true; 1740870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov } 1750870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov // Clear shadow memory for new context (it may share stack 1760870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov // with current context). 17757db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov uptr stack, ssize; 17857db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov ReadContextStack(ucp, &stack, &ssize); 17957db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov ClearShadowMemoryForContextStack(stack, ssize); 1800870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov int res = REAL(swapcontext)(oucp, ucp); 1810870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov // swapcontext technically does not return, but program may swap context to 1820870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov // "oucp" later, that would look as if swapcontext() returned 0. 1830870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov // We need to clear shadow for ucp once again, as it may be in arbitrary 1840870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov // state. 18557db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov ClearShadowMemoryForContextStack(stack, ssize); 1860870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov return res; 1870870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov} 18857db4bae483e7268dd7fc5bc42b0e55564014048Alexey Samsonov#endif // ASAN_INTERCEPT_SWAPCONTEXT 1890870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov 190f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(void, longjmp, void *env, int val) { 191f54b1f9b73a6855d77ee270c282bd61407fa73a0Kostya Serebryany __asan_handle_no_return(); 19209672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov REAL(longjmp)(env, val); 1934803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 1944803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 195fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT__LONGJMP 196f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(void, _longjmp, void *env, int val) { 197f54b1f9b73a6855d77ee270c282bd61407fa73a0Kostya Serebryany __asan_handle_no_return(); 19809672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov REAL(_longjmp)(env, val); 1994803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 200fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#endif 2014803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 202fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT_SIGLONGJMP 203f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(void, siglongjmp, void *env, int val) { 204f54b1f9b73a6855d77ee270c282bd61407fa73a0Kostya Serebryany __asan_handle_no_return(); 20509672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov REAL(siglongjmp)(env, val); 2064803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 20707bb9f1e3600195119aec1aae1aa48a6ed2f5febTimur Iskhodzhanov#endif 2084803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 209fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT___CXA_THROW 210f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(void, __cxa_throw, void *a, void *b, void *c) { 21109672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov CHECK(REAL(__cxa_throw)); 212f54b1f9b73a6855d77ee270c282bd61407fa73a0Kostya Serebryany __asan_handle_no_return(); 21309672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov REAL(__cxa_throw)(a, b, c); 2144803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 2154803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany#endif 2164803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 2174803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany// intercept mlock and friends. 2184803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany// Since asan maps 16T of RAM, mlock is completely unfriendly to asan. 2194803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany// All functions return 0 (success). 2204803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryanystatic void MlockIsUnsupported() { 2214803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany static bool printed = 0; 2224803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany if (printed) return; 2234803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany printed = true; 2244803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany Printf("INFO: AddressSanitizer ignores mlock/mlockall/munlock/munlockall\n"); 2254803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 2263389b8ea81f51a28365a421b2646d594bac490f5Alexey Samsonov 227f2598fc21bf651d23feab396a7581d48c01c3be5Alexey Samsonovextern "C" { 22800f1c091441be5c2cacb99e21bd1965a5e418242Alexander PotapenkoINTERCEPTOR(int, mlock, const void *addr, uptr len) { 2294803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany MlockIsUnsupported(); 2304803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany return 0; 2314803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 2323389b8ea81f51a28365a421b2646d594bac490f5Alexey Samsonov 23300f1c091441be5c2cacb99e21bd1965a5e418242Alexander PotapenkoINTERCEPTOR(int, munlock, const void *addr, uptr len) { 2344803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany MlockIsUnsupported(); 2354803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany return 0; 2364803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 2373389b8ea81f51a28365a421b2646d594bac490f5Alexey Samsonov 23800f1c091441be5c2cacb99e21bd1965a5e418242Alexander PotapenkoINTERCEPTOR(int, mlockall, int flags) { 2394803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany MlockIsUnsupported(); 2404803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany return 0; 2414803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 2423389b8ea81f51a28365a421b2646d594bac490f5Alexey Samsonov 24300f1c091441be5c2cacb99e21bd1965a5e418242Alexander PotapenkoINTERCEPTOR(int, munlockall, void) { 2444803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany MlockIsUnsupported(); 2454803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany return 0; 2464803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 2474803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} // extern "C" 2484803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 24952fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryanystatic inline int CharCmp(unsigned char c1, unsigned char c2) { 25052fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryany return (c1 == c2) ? 0 : (c1 < c2) ? -1 : 1; 25152fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryany} 25252fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryany 25352fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryanystatic inline int CharCaseCmp(unsigned char c1, unsigned char c2) { 2548898102a6b1479a9af65857ccbbc1c329a4d9187Alexey Samsonov int c1_low = ToLower(c1); 2558898102a6b1479a9af65857ccbbc1c329a4d9187Alexey Samsonov int c2_low = ToLower(c2); 25652fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryany return c1_low - c2_low; 25752fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryany} 25852fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryany 2593f4c3875c42078e22c7e5356c5746fd18756d958Kostya SerebryanyINTERCEPTOR(int, memcmp, const void *a1, const void *a2, uptr size) { 26050f2e30497ba2a69ee5721e7235a296d7c13a495Alexander Potapenko if (!asan_inited) return internal_memcmp(a1, a2, size); 26152fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryany ENSURE_ASAN_INITED(); 2621b057b20db71ec6cc2bac460c8b2848f0889d47dKostya Serebryany if (flags()->replace_intrin) { 2638bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko if (flags()->strict_memcmp) { 2648bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko // Check the entire regions even if the first bytes of the buffers are 2658bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko // different. 2668bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko ASAN_READ_RANGE(a1, size); 2678bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko ASAN_READ_RANGE(a2, size); 2688bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko // Fallthrough to REAL(memcmp) below. 2698bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko } else { 2708bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko unsigned char c1 = 0, c2 = 0; 2718bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko const unsigned char *s1 = (const unsigned char*)a1; 2728bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko const unsigned char *s2 = (const unsigned char*)a2; 2738bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko uptr i; 2748bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko for (i = 0; i < size; i++) { 2758bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko c1 = s1[i]; 2768bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko c2 = s2[i]; 2778bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko if (c1 != c2) break; 2788bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko } 2798bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko ASAN_READ_RANGE(s1, Min(i + 1, size)); 2808bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko ASAN_READ_RANGE(s2, Min(i + 1, size)); 2818bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko return CharCmp(c1, c2); 2828bd5e74fa9d37a182088114918380e255e22e493Alexander Potapenko } 28352fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryany } 2841b057b20db71ec6cc2bac460c8b2848f0889d47dKostya Serebryany return REAL(memcmp(a1, a2, size)); 28552fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryany} 28652fb238ccc45781e4e1d097ae1ee748c898b5825Kostya Serebryany 2873f4c3875c42078e22c7e5356c5746fd18756d958Kostya SerebryanyINTERCEPTOR(void*, memcpy, void *to, const void *from, uptr size) { 28850f2e30497ba2a69ee5721e7235a296d7c13a495Alexander Potapenko if (!asan_inited) return internal_memcpy(to, from, size); 2891e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany // memcpy is called during __asan_init() from the internals 2901e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany // of printf(...). 2911e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany if (asan_init_is_running) { 29209672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(memcpy)(to, from, size); 2931e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 294e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany ENSURE_ASAN_INITED(); 295cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_intrin) { 296c655cfa8dc0fdf5b521e565f6cbdbf7981fba1b2Kostya Serebryany if (to != from) { 297c655cfa8dc0fdf5b521e565f6cbdbf7981fba1b2Kostya Serebryany // We do not treat memcpy with to==from as a bug. 298c655cfa8dc0fdf5b521e565f6cbdbf7981fba1b2Kostya Serebryany // See http://llvm.org/bugs/show_bug.cgi?id=11763. 299c655cfa8dc0fdf5b521e565f6cbdbf7981fba1b2Kostya Serebryany CHECK_RANGES_OVERLAP("memcpy", to, size, from, size); 300c655cfa8dc0fdf5b521e565f6cbdbf7981fba1b2Kostya Serebryany } 301c75d8483e27528349620ccf4e997a72029a7ea17Alexander Potapenko ASAN_READ_RANGE(from, size); 302c75d8483e27528349620ccf4e997a72029a7ea17Alexander Potapenko ASAN_WRITE_RANGE(to, size); 3031e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 304f1673e61768cb08d488a75584b61bfdf24ffdac1Alexander Potapenko // Interposing of resolver functions is broken on Mac OS 10.7 and 10.8. 305f1673e61768cb08d488a75584b61bfdf24ffdac1Alexander Potapenko // See also http://code.google.com/p/address-sanitizer/issues/detail?id=116. 306f1673e61768cb08d488a75584b61bfdf24ffdac1Alexander Potapenko return internal_memcpy(to, from, size); 3071e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 3081e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 3093f4c3875c42078e22c7e5356c5746fd18756d958Kostya SerebryanyINTERCEPTOR(void*, memmove, void *to, const void *from, uptr size) { 3103e8458ab54c7cbaec45e367b2da909c6f94b291cAlexander Potapenko if (!asan_inited) return internal_memmove(to, from, size); 311a1a25c1afe38e59ffb342c24bb5bb10d05679df7Alexey Samsonov if (asan_init_is_running) { 312a1a25c1afe38e59ffb342c24bb5bb10d05679df7Alexey Samsonov return REAL(memmove)(to, from, size); 313a1a25c1afe38e59ffb342c24bb5bb10d05679df7Alexey Samsonov } 314e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany ENSURE_ASAN_INITED(); 315cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_intrin) { 316c75d8483e27528349620ccf4e997a72029a7ea17Alexander Potapenko ASAN_READ_RANGE(from, size); 317c75d8483e27528349620ccf4e997a72029a7ea17Alexander Potapenko ASAN_WRITE_RANGE(to, size); 3181e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 319f1673e61768cb08d488a75584b61bfdf24ffdac1Alexander Potapenko // Interposing of resolver functions is broken on Mac OS 10.7 and 10.8. 320f1673e61768cb08d488a75584b61bfdf24ffdac1Alexander Potapenko // See also http://code.google.com/p/address-sanitizer/issues/detail?id=116. 321f1673e61768cb08d488a75584b61bfdf24ffdac1Alexander Potapenko return internal_memmove(to, from, size); 3221e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 3231e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 3243f4c3875c42078e22c7e5356c5746fd18756d958Kostya SerebryanyINTERCEPTOR(void*, memset, void *block, int c, uptr size) { 32550f2e30497ba2a69ee5721e7235a296d7c13a495Alexander Potapenko if (!asan_inited) return internal_memset(block, c, size); 326ebb9702cff96192c6a6ea963037929ca7ed60eaeAlexander Potapenko // memset is called inside Printf. 327e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany if (asan_init_is_running) { 32809672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(memset)(block, c, size); 329e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany } 330e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany ENSURE_ASAN_INITED(); 331cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_intrin) { 3321e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany ASAN_WRITE_RANGE(block, size); 3331e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 33409672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(memset)(block, c, size); 3351e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 3361e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 337f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(char*, strchr, const char *str, int c) { 33850f2e30497ba2a69ee5721e7235a296d7c13a495Alexander Potapenko if (!asan_inited) return internal_strchr(str, c); 3398d6e3f7d011970e35dadf831964260bcf6a4d8a9Alexander Potapenko // strchr is called inside create_purgeable_zone() when MallocGuardEdges=1 is 3408d6e3f7d011970e35dadf831964260bcf6a4d8a9Alexander Potapenko // used. 3418d6e3f7d011970e35dadf831964260bcf6a4d8a9Alexander Potapenko if (asan_init_is_running) { 3428d6e3f7d011970e35dadf831964260bcf6a4d8a9Alexander Potapenko return REAL(strchr)(str, c); 3438d6e3f7d011970e35dadf831964260bcf6a4d8a9Alexander Potapenko } 344e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany ENSURE_ASAN_INITED(); 34509672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov char *result = REAL(strchr)(str, c); 346cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_str) { 3473f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany uptr bytes_read = (result ? result - str : REAL(strlen)(str)) + 1; 3481e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany ASAN_READ_RANGE(str, bytes_read); 3491e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 3501e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany return result; 3511e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 3521e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 353fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT_INDEX 354fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov# if ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX 3554b0c5f240e71be4f375627e57d0f1b89600918a7Evgeniy StepanovINTERCEPTOR(char*, index, const char *string, int c) 35672bbfd4f3a442afde281476bc6bd41b3b2152a4eAlexander Potapenko ALIAS(WRAPPER_NAME(strchr)); 357fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov# else 35824e13723f8477d8c42ab8b2a7f4f69fc089842f1Evgeniy Stepanov# if SANITIZER_MAC 35950a002ecad3f0a10c136496e5b6289bd3c71590eAlexander PotapenkoDECLARE_REAL(char*, index, const char *string, int c) 36050a002ecad3f0a10c136496e5b6289bd3c71590eAlexander PotapenkoOVERRIDE_FUNCTION(index, strchr); 36150a002ecad3f0a10c136496e5b6289bd3c71590eAlexander Potapenko# else 36250a002ecad3f0a10c136496e5b6289bd3c71590eAlexander PotapenkoDEFINE_REAL(char*, index, const char *string, int c); 36350a002ecad3f0a10c136496e5b6289bd3c71590eAlexander Potapenko# endif 364fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov# endif 365fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#endif // ASAN_INTERCEPT_INDEX 366af0f01d77c2a495f023ffbf6cce85b33bbd2306dKostya Serebryany 36737b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko// For both strcat() and strncat() we need to check the validity of |to| 36837b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko// argument irrespective of the |from| length. 369f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(char*, strcat, char *to, const char *from) { // NOLINT 3700985ca240812ac5519168a6aecbccf4c513ae243Kostya Serebryany ENSURE_ASAN_INITED(); 371cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_str) { 3723f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany uptr from_length = REAL(strlen)(from); 3730985ca240812ac5519168a6aecbccf4c513ae243Kostya Serebryany ASAN_READ_RANGE(from, from_length + 1); 37437b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko uptr to_length = REAL(strlen)(to); 37537b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko ASAN_READ_RANGE(to, to_length); 37637b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko ASAN_WRITE_RANGE(to + to_length, from_length + 1); 37737b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko // If the copying actually happens, the |from| string should not overlap 37837b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko // with the resulting string starting at |to|, which has a length of 37937b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko // to_length + from_length + 1. 3800985ca240812ac5519168a6aecbccf4c513ae243Kostya Serebryany if (from_length > 0) { 38137b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko CHECK_RANGES_OVERLAP("strcat", to, from_length + to_length + 1, 38237b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko from, from_length + 1); 3830985ca240812ac5519168a6aecbccf4c513ae243Kostya Serebryany } 3840985ca240812ac5519168a6aecbccf4c513ae243Kostya Serebryany } 38509672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(strcat)(to, from); // NOLINT 3860985ca240812ac5519168a6aecbccf4c513ae243Kostya Serebryany} 3870985ca240812ac5519168a6aecbccf4c513ae243Kostya Serebryany 388c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey SamsonovINTERCEPTOR(char*, strncat, char *to, const char *from, uptr size) { 389c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov ENSURE_ASAN_INITED(); 39037b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko if (flags()->replace_str) { 391c925697df6626bb0ea27ea96539bf0580f8f3d3dAlexey Samsonov uptr from_length = MaybeRealStrnlen(from, size); 39237b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko uptr copy_length = Min(size, from_length + 1); 39337b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko ASAN_READ_RANGE(from, copy_length); 394c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov uptr to_length = REAL(strlen)(to); 395c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov ASAN_READ_RANGE(to, to_length); 396c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov ASAN_WRITE_RANGE(to + to_length, from_length + 1); 397c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov if (from_length > 0) { 39837b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko CHECK_RANGES_OVERLAP("strncat", to, to_length + copy_length + 1, 39937b3fcd6fdec5740fe51fc1315c5d4d54313de98Alexander Potapenko from, copy_length); 400c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov } 401c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov } 402c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov return REAL(strncat)(to, from, size); 403c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov} 404c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov 405f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(int, strcmp, const char *s1, const char *s2) { 40650f2e30497ba2a69ee5721e7235a296d7c13a495Alexander Potapenko if (!asan_inited) return internal_strcmp(s1, s2); 407fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov if (asan_init_is_running) { 408fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov return REAL(strcmp)(s1, s2); 4091e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 4108648e7734ff02a25706464e9e294bd217622bcaeKostya Serebryany ENSURE_ASAN_INITED(); 4111e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany unsigned char c1, c2; 4123f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany uptr i; 4131e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany for (i = 0; ; i++) { 4141e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany c1 = (unsigned char)s1[i]; 4151e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany c2 = (unsigned char)s2[i]; 4161e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany if (c1 != c2 || c1 == '\0') break; 4171e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 4181e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany ASAN_READ_RANGE(s1, i + 1); 4191e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany ASAN_READ_RANGE(s2, i + 1); 4201e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany return CharCmp(c1, c2); 4211e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 4221e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 423f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(char*, strcpy, char *to, const char *from) { // NOLINT 42424e13723f8477d8c42ab8b2a7f4f69fc089842f1Evgeniy Stepanov#if SANITIZER_MAC 425beda44f87166f91dbeef3d174d77395653bead4dAlexander Potapenko if (!asan_inited) return REAL(strcpy)(to, from); // NOLINT 4260ef531054fc25c11e372cbab1384f10954984219Alexander Potapenko#endif 4271e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany // strcpy is called from malloc_default_purgeable_zone() 4281e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany // in __asan::ReplaceSystemAlloc() on Mac. 4291e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany if (asan_init_is_running) { 43009672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(strcpy)(to, from); // NOLINT 4311e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 432e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany ENSURE_ASAN_INITED(); 433cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_str) { 4343f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany uptr from_size = REAL(strlen)(from) + 1; 435c5e72a3b7c60f1b2d9d9be3a07d397d5b5f872beKostya Serebryany CHECK_RANGES_OVERLAP("strcpy", to, from_size, from, from_size); 4361e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany ASAN_READ_RANGE(from, from_size); 4371e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany ASAN_WRITE_RANGE(to, from_size); 4381e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 43909672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(strcpy)(to, from); // NOLINT 4401e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 4411e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 442fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT_STRDUP 443f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(char*, strdup, const char *s) { 44424e13723f8477d8c42ab8b2a7f4f69fc089842f1Evgeniy Stepanov#if SANITIZER_MAC 44571578faf4eb8e61aefb3121e1945cc47f07cea0dAlexander Potapenko // FIXME: because internal_strdup() uses InternalAlloc(), which currently 44671578faf4eb8e61aefb3121e1945cc47f07cea0dAlexander Potapenko // just calls malloc() on Mac, we can't use internal_strdup() with the 44771578faf4eb8e61aefb3121e1945cc47f07cea0dAlexander Potapenko // dynamic runtime. We can remove the call to REAL(strdup) once InternalAlloc 44871578faf4eb8e61aefb3121e1945cc47f07cea0dAlexander Potapenko // starts using mmap() instead. 44971578faf4eb8e61aefb3121e1945cc47f07cea0dAlexander Potapenko // See also http://code.google.com/p/address-sanitizer/issues/detail?id=123. 45071578faf4eb8e61aefb3121e1945cc47f07cea0dAlexander Potapenko if (!asan_inited) return REAL(strdup)(s); 45171578faf4eb8e61aefb3121e1945cc47f07cea0dAlexander Potapenko#endif 45250f2e30497ba2a69ee5721e7235a296d7c13a495Alexander Potapenko if (!asan_inited) return internal_strdup(s); 453e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany ENSURE_ASAN_INITED(); 454cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_str) { 4553f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany uptr length = REAL(strlen)(s); 4561e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany ASAN_READ_RANGE(s, length + 1); 4571e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 45809672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(strdup)(s); 4591e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 460fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#endif 4611e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 4623f4c3875c42078e22c7e5356c5746fd18756d958Kostya SerebryanyINTERCEPTOR(uptr, strlen, const char *s) { 46350f2e30497ba2a69ee5721e7235a296d7c13a495Alexander Potapenko if (!asan_inited) return internal_strlen(s); 4641e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany // strlen is called from malloc_default_purgeable_zone() 4651e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany // in __asan::ReplaceSystemAlloc() on Mac. 4661e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany if (asan_init_is_running) { 46709672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(strlen)(s); 4681e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 469e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany ENSURE_ASAN_INITED(); 4703f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany uptr length = REAL(strlen)(s); 471cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_str) { 4721e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany ASAN_READ_RANGE(s, length + 1); 4731e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 4741e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany return length; 4751e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 4761e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 477fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT_STRCASECMP_AND_STRNCASECMP 478fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey SamsonovINTERCEPTOR(int, strcasecmp, const char *s1, const char *s2) { 479fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov ENSURE_ASAN_INITED(); 480fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov unsigned char c1, c2; 481fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov uptr i; 482fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov for (i = 0; ; i++) { 483fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov c1 = (unsigned char)s1[i]; 484fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov c2 = (unsigned char)s2[i]; 485fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov if (CharCaseCmp(c1, c2) != 0 || c1 == '\0') break; 486fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov } 487fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov ASAN_READ_RANGE(s1, i + 1); 488fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov ASAN_READ_RANGE(s2, i + 1); 489fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov return CharCaseCmp(c1, c2); 490fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov} 491fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov 4923f4c3875c42078e22c7e5356c5746fd18756d958Kostya SerebryanyINTERCEPTOR(int, strncasecmp, const char *s1, const char *s2, uptr n) { 493af0f01d77c2a495f023ffbf6cce85b33bbd2306dKostya Serebryany ENSURE_ASAN_INITED(); 494af0f01d77c2a495f023ffbf6cce85b33bbd2306dKostya Serebryany unsigned char c1 = 0, c2 = 0; 4953f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany uptr i; 496f2598fc21bf651d23feab396a7581d48c01c3be5Alexey Samsonov for (i = 0; i < n; i++) { 497af0f01d77c2a495f023ffbf6cce85b33bbd2306dKostya Serebryany c1 = (unsigned char)s1[i]; 498af0f01d77c2a495f023ffbf6cce85b33bbd2306dKostya Serebryany c2 = (unsigned char)s2[i]; 499af0f01d77c2a495f023ffbf6cce85b33bbd2306dKostya Serebryany if (CharCaseCmp(c1, c2) != 0 || c1 == '\0') break; 500af0f01d77c2a495f023ffbf6cce85b33bbd2306dKostya Serebryany } 501f2598fc21bf651d23feab396a7581d48c01c3be5Alexey Samsonov ASAN_READ_RANGE(s1, Min(i + 1, n)); 502f2598fc21bf651d23feab396a7581d48c01c3be5Alexey Samsonov ASAN_READ_RANGE(s2, Min(i + 1, n)); 503af0f01d77c2a495f023ffbf6cce85b33bbd2306dKostya Serebryany return CharCaseCmp(c1, c2); 504af0f01d77c2a495f023ffbf6cce85b33bbd2306dKostya Serebryany} 505fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#endif // ASAN_INTERCEPT_STRCASECMP_AND_STRNCASECMP 506af0f01d77c2a495f023ffbf6cce85b33bbd2306dKostya Serebryany 5073f4c3875c42078e22c7e5356c5746fd18756d958Kostya SerebryanyINTERCEPTOR(int, strncmp, const char *s1, const char *s2, uptr size) { 50850f2e30497ba2a69ee5721e7235a296d7c13a495Alexander Potapenko if (!asan_inited) return internal_strncmp(s1, s2, size); 5091e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany // strncmp is called from malloc_default_purgeable_zone() 5101e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany // in __asan::ReplaceSystemAlloc() on Mac. 5111e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany if (asan_init_is_running) { 51209672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(strncmp)(s1, s2, size); 5131e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 5148648e7734ff02a25706464e9e294bd217622bcaeKostya Serebryany ENSURE_ASAN_INITED(); 5151e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany unsigned char c1 = 0, c2 = 0; 5163f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany uptr i; 5171e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany for (i = 0; i < size; i++) { 5181e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany c1 = (unsigned char)s1[i]; 5191e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany c2 = (unsigned char)s2[i]; 5201e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany if (c1 != c2 || c1 == '\0') break; 5211e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 5222d8b3bdb112ebb8ed3f15ee41d4cebcd683b41b0Kostya Serebryany ASAN_READ_RANGE(s1, Min(i + 1, size)); 5232d8b3bdb112ebb8ed3f15ee41d4cebcd683b41b0Kostya Serebryany ASAN_READ_RANGE(s2, Min(i + 1, size)); 5241e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany return CharCmp(c1, c2); 5251e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 5261e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 5273f4c3875c42078e22c7e5356c5746fd18756d958Kostya SerebryanyINTERCEPTOR(char*, strncpy, char *to, const char *from, uptr size) { 528e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany ENSURE_ASAN_INITED(); 529cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_str) { 530c925697df6626bb0ea27ea96539bf0580f8f3d3dAlexey Samsonov uptr from_size = Min(size, MaybeRealStrnlen(from, size) + 1); 531c5e72a3b7c60f1b2d9d9be3a07d397d5b5f872beKostya Serebryany CHECK_RANGES_OVERLAP("strncpy", to, from_size, from, from_size); 5321e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany ASAN_READ_RANGE(from, from_size); 5331e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany ASAN_WRITE_RANGE(to, size); 5341e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 53509672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(strncpy)(to, from, size); 5361e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 5371e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 53881a7a4ab53c94e76c3b131d6f0ed82894640900bAlexey Samsonov#if ASAN_INTERCEPT_STRNLEN 5393f4c3875c42078e22c7e5356c5746fd18756d958Kostya SerebryanyINTERCEPTOR(uptr, strnlen, const char *s, uptr maxlen) { 540e130191a254064bfd1c8d373afdacf6d52979713Kostya Serebryany ENSURE_ASAN_INITED(); 5413f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany uptr length = REAL(strnlen)(s, maxlen); 542cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->replace_str) { 5432d8b3bdb112ebb8ed3f15ee41d4cebcd683b41b0Kostya Serebryany ASAN_READ_RANGE(s, Min(length + 1, maxlen)); 5441e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 5451e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany return length; 5461e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 54781a7a4ab53c94e76c3b131d6f0ed82894640900bAlexey Samsonov#endif // ASAN_INTERCEPT_STRNLEN 548547652c45fd7f7497dd214ec8ec6b6ee0f80359dKostya Serebryany 5498f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonovstatic inline bool IsValidStrtolBase(int base) { 5508f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov return (base == 0) || (2 <= base && base <= 36); 5518f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov} 5528f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov 5538f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonovstatic inline void FixRealStrtolEndptr(const char *nptr, char **endptr) { 5543f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany CHECK(endptr != 0); 5558f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov if (nptr == *endptr) { 5568f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov // No digits were found at strtol call, we need to find out the last 5578f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov // symbol accessed by strtoll on our own. 5588f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov // We get this symbol by skipping leading blanks and optional +/- sign. 5598f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov while (IsSpace(*nptr)) nptr++; 5608f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov if (*nptr == '+' || *nptr == '-') nptr++; 5618f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov *endptr = (char*)nptr; 5628f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov } 5638f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov CHECK(*endptr >= nptr); 56484ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov} 56584ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov 566847f932ab0405757946433b81d3b2952b306b0bcAlexey SamsonovINTERCEPTOR(long, strtol, const char *nptr, // NOLINT 56784ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov char **endptr, int base) { 56884ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov ENSURE_ASAN_INITED(); 569cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (!flags()->replace_str) { 570847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov return REAL(strtol)(nptr, endptr, base); 57184ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov } 57284ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov char *real_endptr; 573847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov long result = REAL(strtol)(nptr, &real_endptr, base); // NOLINT 5743f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany if (endptr != 0) { 57584ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov *endptr = real_endptr; 57684ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov } 5778f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov if (IsValidStrtolBase(base)) { 5788f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov FixRealStrtolEndptr(nptr, &real_endptr); 57984ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov ASAN_READ_RANGE(nptr, (real_endptr - nptr) + 1); 58084ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov } 58184ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov return result; 58284ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov} 58384ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov 584847f932ab0405757946433b81d3b2952b306b0bcAlexey SamsonovINTERCEPTOR(int, atoi, const char *nptr) { 58524e13723f8477d8c42ab8b2a7f4f69fc089842f1Evgeniy Stepanov#if SANITIZER_MAC 5860ef531054fc25c11e372cbab1384f10954984219Alexander Potapenko if (!asan_inited) return REAL(atoi)(nptr); 5870ef531054fc25c11e372cbab1384f10954984219Alexander Potapenko#endif 588847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov ENSURE_ASAN_INITED(); 589cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (!flags()->replace_str) { 590847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov return REAL(atoi)(nptr); 591847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov } 592847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov char *real_endptr; 593847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov // "man atoi" tells that behavior of atoi(nptr) is the same as 5943f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany // strtol(nptr, 0, 10), i.e. it sets errno to ERANGE if the 595847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov // parsed integer can't be stored in *long* type (even if it's 596847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov // different from int). So, we just imitate this behavior. 597847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov int result = REAL(strtol)(nptr, &real_endptr, 10); 598847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov FixRealStrtolEndptr(nptr, &real_endptr); 599847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov ASAN_READ_RANGE(nptr, (real_endptr - nptr) + 1); 600847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov return result; 601847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov} 602847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov 603847f932ab0405757946433b81d3b2952b306b0bcAlexey SamsonovINTERCEPTOR(long, atol, const char *nptr) { // NOLINT 60424e13723f8477d8c42ab8b2a7f4f69fc089842f1Evgeniy Stepanov#if SANITIZER_MAC 6050ef531054fc25c11e372cbab1384f10954984219Alexander Potapenko if (!asan_inited) return REAL(atol)(nptr); 6060ef531054fc25c11e372cbab1384f10954984219Alexander Potapenko#endif 607847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov ENSURE_ASAN_INITED(); 608cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (!flags()->replace_str) { 609847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov return REAL(atol)(nptr); 610847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov } 611847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov char *real_endptr; 612847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov long result = REAL(strtol)(nptr, &real_endptr, 10); // NOLINT 613847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov FixRealStrtolEndptr(nptr, &real_endptr); 614847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov ASAN_READ_RANGE(nptr, (real_endptr - nptr) + 1); 615847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov return result; 616847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov} 617847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov 618847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov#if ASAN_INTERCEPT_ATOLL_AND_STRTOLL 619847f932ab0405757946433b81d3b2952b306b0bcAlexey SamsonovINTERCEPTOR(long long, strtoll, const char *nptr, // NOLINT 6208f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov char **endptr, int base) { 6218f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov ENSURE_ASAN_INITED(); 622cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (!flags()->replace_str) { 623847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov return REAL(strtoll)(nptr, endptr, base); 6248f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov } 6258f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov char *real_endptr; 626847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov long long result = REAL(strtoll)(nptr, &real_endptr, base); // NOLINT 6273f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany if (endptr != 0) { 6288f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov *endptr = real_endptr; 6298f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov } 630847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov // If base has unsupported value, strtoll can exit with EINVAL 631847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov // without reading any characters. So do additional checks only 632847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov // if base is valid. 6338f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov if (IsValidStrtolBase(base)) { 6348f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov FixRealStrtolEndptr(nptr, &real_endptr); 6358f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov ASAN_READ_RANGE(nptr, (real_endptr - nptr) + 1); 6368f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov } 6378f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov return result; 6388f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov} 6398f6a77f3f59ebc5f40f235e51836f468f30b9110Alexey Samsonov 640847f932ab0405757946433b81d3b2952b306b0bcAlexey SamsonovINTERCEPTOR(long long, atoll, const char *nptr) { // NOLINT 641847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov ENSURE_ASAN_INITED(); 642cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (!flags()->replace_str) { 643847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov return REAL(atoll)(nptr); 644847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov } 645847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov char *real_endptr; 646847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov long long result = REAL(strtoll)(nptr, &real_endptr, 10); // NOLINT 647847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov FixRealStrtolEndptr(nptr, &real_endptr); 648847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov ASAN_READ_RANGE(nptr, (real_endptr - nptr) + 1); 649847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov return result; 650847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov} 651847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov#endif // ASAN_INTERCEPT_ATOLL_AND_STRTOLL 652847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov 653580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov#define ASAN_INTERCEPT_FUNC(name) do { \ 654cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (!INTERCEPT_FUNCTION(name) && flags()->verbosity > 0) \ 655580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov Report("AddressSanitizer: failed to intercept '" #name "'\n"); \ 656580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov } while (0) 657580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov 65824e13723f8477d8c42ab8b2a7f4f69fc089842f1Evgeniy Stepanov#if SANITIZER_WINDOWS 659600972e3427173cc8904d741decd1af0ed5de9fdTimur IskhodzhanovINTERCEPTOR_WINAPI(DWORD, CreateThread, 6603f4c3875c42078e22c7e5356c5746fd18756d958Kostya Serebryany void* security, uptr stack_size, 661600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov DWORD (__stdcall *start_routine)(void*), void* arg, 662600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov DWORD flags, void* tid) { 663a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany GET_STACK_TRACE_THREAD; 664e0cff0bc20ae51790c8edfbceb817e18ebf5355eKostya Serebryany u32 current_tid = asanThreadRegistry().GetCurrentTidOrInvalid(); 665600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov AsanThread *t = AsanThread::Create(current_tid, start_routine, arg, &stack); 666600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov asanThreadRegistry().RegisterThread(t); 667600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov return REAL(CreateThread)(security, stack_size, 668600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov asan_thread_start, t, flags, tid); 669600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov} 670600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov 671600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanovnamespace __asan { 672600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanovvoid InitializeWindowsInterceptors() { 673580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(CreateThread); 674600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov} 675600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov 676600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov} // namespace __asan 677600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov#endif 678600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov 679547652c45fd7f7497dd214ec8ec6b6ee0f80359dKostya Serebryany// ---------------------- InitializeAsanInterceptors ---------------- {{{1 680547652c45fd7f7497dd214ec8ec6b6ee0f80359dKostya Serebryanynamespace __asan { 681547652c45fd7f7497dd214ec8ec6b6ee0f80359dKostya Serebryanyvoid InitializeAsanInterceptors() { 682fdbdab5ff8de4c23b58bb411ea2358a78e2d9b2fKostya Serebryany static bool was_called_once; 683fdbdab5ff8de4c23b58bb411ea2358a78e2d9b2fKostya Serebryany CHECK(was_called_once == false); 684fdbdab5ff8de4c23b58bb411ea2358a78e2d9b2fKostya Serebryany was_called_once = true; 68524e13723f8477d8c42ab8b2a7f4f69fc089842f1Evgeniy Stepanov#if SANITIZER_MAC 6860ef531054fc25c11e372cbab1384f10954984219Alexander Potapenko return; 68769563986ca570ce750111a82264d51ddbf4107baAlexander Potapenko#else 6888530e2b953f0b34ecd267a6aba5f155d5c08c5c8Kostya Serebryany SANITIZER_COMMON_INTERCEPTORS_INIT; 6898530e2b953f0b34ecd267a6aba5f155d5c08c5c8Kostya Serebryany 69007bb9f1e3600195119aec1aae1aa48a6ed2f5febTimur Iskhodzhanov // Intercept mem* functions. 691580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(memcmp); 692580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(memmove); 693580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(memset); 69438dd4ed885e714c376466f6fe0d69f5f22d37014Alexey Samsonov if (PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE) { 695580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(memcpy); 696573fb4b102dda9d231a8dbd0c01e67e84e9b0874Alexander Potapenko } 69707bb9f1e3600195119aec1aae1aa48a6ed2f5febTimur Iskhodzhanov 69807bb9f1e3600195119aec1aae1aa48a6ed2f5febTimur Iskhodzhanov // Intercept str* functions. 699580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(strcat); // NOLINT 700580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(strchr); 701580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(strcmp); 702580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(strcpy); // NOLINT 703580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(strlen); 704c1bdd5adca453f2fae238a4c53ade35ae60b85daAlexey Samsonov ASAN_INTERCEPT_FUNC(strncat); 705580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(strncmp); 706580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(strncpy); 707fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT_STRCASECMP_AND_STRNCASECMP 708580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(strcasecmp); 709580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(strncasecmp); 710fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#endif 711fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT_STRDUP 712fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov ASAN_INTERCEPT_FUNC(strdup); 713fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#endif 714fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT_STRNLEN 715fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov ASAN_INTERCEPT_FUNC(strnlen); 716fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#endif 71769563986ca570ce750111a82264d51ddbf4107baAlexander Potapenko#if ASAN_INTERCEPT_INDEX && ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX 718580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(index); 71907bb9f1e3600195119aec1aae1aa48a6ed2f5febTimur Iskhodzhanov#endif 7205b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov 721580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(atoi); 722580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(atol); 723580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(strtol); 724847f932ab0405757946433b81d3b2952b306b0bcAlexey Samsonov#if ASAN_INTERCEPT_ATOLL_AND_STRTOLL 725580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(atoll); 726580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(strtoll); 72784ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov#endif 72884ba324b94d22a69acc823e845f9718fd2984e44Alexey Samsonov 729f0c6de3d91ba5cdfbb17a630e823523c7d433160Alexander Potapenko#if ASAN_INTERCEPT_MLOCKX 73000f1c091441be5c2cacb99e21bd1965a5e418242Alexander Potapenko // Intercept mlock/munlock. 73100f1c091441be5c2cacb99e21bd1965a5e418242Alexander Potapenko ASAN_INTERCEPT_FUNC(mlock); 73200f1c091441be5c2cacb99e21bd1965a5e418242Alexander Potapenko ASAN_INTERCEPT_FUNC(munlock); 73300f1c091441be5c2cacb99e21bd1965a5e418242Alexander Potapenko ASAN_INTERCEPT_FUNC(mlockall); 73400f1c091441be5c2cacb99e21bd1965a5e418242Alexander Potapenko ASAN_INTERCEPT_FUNC(munlockall); 735f0c6de3d91ba5cdfbb17a630e823523c7d433160Alexander Potapenko#endif 73600f1c091441be5c2cacb99e21bd1965a5e418242Alexander Potapenko 73707bb9f1e3600195119aec1aae1aa48a6ed2f5febTimur Iskhodzhanov // Intecept signal- and jump-related functions. 738580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(longjmp); 73934a3202a2c22816a6da66959e266a2d078ded37bAlexey Samsonov#if ASAN_INTERCEPT_SIGNAL_AND_SIGACTION 740580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(sigaction); 741580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(signal); 742919c24787a655597bdcf367e26c9dd1504e9f463Evgeniy Stepanov#endif 7430870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov#if ASAN_INTERCEPT_SWAPCONTEXT 7440870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov ASAN_INTERCEPT_FUNC(swapcontext); 7450870028410087e67a0049c76cb7c64f02c260d24Alexey Samsonov#endif 746fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT__LONGJMP 747580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(_longjmp); 748fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#endif 749fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT_SIGLONGJMP 750580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(siglongjmp); 751fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#endif 752fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov 753fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov // Intercept exception handling functions. 754fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT___CXA_THROW 755fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov INTERCEPT_FUNCTION(__cxa_throw); 7563e81fe43798c096d1d3565596f0717b9919de4fbTimur Iskhodzhanov#endif 7573e81fe43798c096d1d3565596f0717b9919de4fbTimur Iskhodzhanov 75807bb9f1e3600195119aec1aae1aa48a6ed2f5febTimur Iskhodzhanov // Intercept threading-related functions 759fd2ae4fc7df0e5acd200f30d87bbc6b96830a989Alexey Samsonov#if ASAN_INTERCEPT_PTHREAD_CREATE 760580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov ASAN_INTERCEPT_FUNC(pthread_create); 76107bb9f1e3600195119aec1aae1aa48a6ed2f5febTimur Iskhodzhanov#endif 76207bb9f1e3600195119aec1aae1aa48a6ed2f5febTimur Iskhodzhanov 763600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov // Some Windows-specific interceptors. 76424e13723f8477d8c42ab8b2a7f4f69fc089842f1Evgeniy Stepanov#if SANITIZER_WINDOWS 765600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov InitializeWindowsInterceptors(); 766600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov#endif 767600972e3427173cc8904d741decd1af0ed5de9fdTimur Iskhodzhanov 768cb8c4dce691097718d5af41b36899b72ef4b1d84Alexey Samsonov if (flags()->verbosity > 0) { 7692962f26071ebef1d5fec52b5569e5ae7aae45c9bAlexander Potapenko Report("AddressSanitizer: libc interceptors initialized\n"); 770547652c45fd7f7497dd214ec8ec6b6ee0f80359dKostya Serebryany } 7712673fd8406197c42f16cede6d287f72169298c2eKostya Serebryany#endif // __APPLE__ 772547652c45fd7f7497dd214ec8ec6b6ee0f80359dKostya Serebryany} 773547652c45fd7f7497dd214ec8ec6b6ee0f80359dKostya Serebryany 774547652c45fd7f7497dd214ec8ec6b6ee0f80359dKostya Serebryany} // namespace __asan 775