//===-- msan_interceptors.cpp ---------------------------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // // This file is a part of MemorySanitizer. // // Interceptors for standard library functions. // // FIXME: move as many interceptors as possible into // sanitizer_common/sanitizer_common_interceptors.h //===----------------------------------------------------------------------===// #define SANITIZER_COMMON_NO_REDEFINE_BUILTINS #include "interception/interception.h" #include "msan.h" #include "msan_chained_origin_depot.h" #include "msan_dl.h" #include "msan_origin.h" #include "msan_poisoning.h" #include "msan_report.h" #include "msan_thread.h" #include "sanitizer_common/sanitizer_allocator.h" #include "sanitizer_common/sanitizer_allocator_dlsym.h" #include "sanitizer_common/sanitizer_allocator_interface.h" #include "sanitizer_common/sanitizer_atomic.h" #include "sanitizer_common/sanitizer_common.h" #include "sanitizer_common/sanitizer_errno.h" #include "sanitizer_common/sanitizer_errno_codes.h" #include "sanitizer_common/sanitizer_glibc_version.h" #include "sanitizer_common/sanitizer_libc.h" #include "sanitizer_common/sanitizer_linux.h" #include "sanitizer_common/sanitizer_platform_limits_netbsd.h" #include "sanitizer_common/sanitizer_platform_limits_posix.h" #include "sanitizer_common/sanitizer_stackdepot.h" #include "sanitizer_common/sanitizer_vector.h" #if SANITIZER_NETBSD #define fstat … #define gettimeofday … #define getrusage … #define tzset … #endif #include <stdarg.h> // ACHTUNG! No other system header includes in this file. // Ideally, we should get rid of stdarg.h as well. usingnamespace__msan; memory_order; atomic_load; atomic_store; atomic_uintptr_t; DECLARE_REAL(…) DECLARE_REAL(…) DECLARE_REAL(…) DECLARE_REAL(…) // True if this is a nested interceptor. static THREADLOCAL int in_interceptor_scope; void __msan_scoped_disable_interceptor_checks() { … } void __msan_scoped_enable_interceptor_checks() { … } struct InterceptorScope { … }; bool IsInInterceptorScope() { … } struct DlsymAlloc : public DlSymAllocator<DlsymAlloc> { … }; #define ENSURE_MSAN_INITED() … // Check that [x, x+n) range is unpoisoned. #define CHECK_UNPOISONED_0(x, n) … // Check that [x, x+n) range is unpoisoned unless we are in a nested // interceptor. #define CHECK_UNPOISONED(x, n) … #define CHECK_UNPOISONED_STRING_OF_LEN(x, len, n) … #define CHECK_UNPOISONED_STRING(x, n) … #if !SANITIZER_FREEBSD && !SANITIZER_NETBSD INTERCEPTOR(SIZE_T, fread_unlocked, void *ptr, SIZE_T size, SIZE_T nmemb, void *file) { … } #define MSAN_MAYBE_INTERCEPT_FREAD_UNLOCKED … #else #define MSAN_MAYBE_INTERCEPT_FREAD_UNLOCKED #endif #if !SANITIZER_NETBSD INTERCEPTOR(void *, mempcpy, void *dest, const void *src, SIZE_T n) { … } #define MSAN_MAYBE_INTERCEPT_MEMPCPY … #else #define MSAN_MAYBE_INTERCEPT_MEMPCPY #endif INTERCEPTOR(void *, memccpy, void *dest, const void *src, int c, SIZE_T n) { … } INTERCEPTOR(void *, bcopy, const void *src, void *dest, SIZE_T n) { … } INTERCEPTOR(int, posix_memalign, void **memptr, SIZE_T alignment, SIZE_T size) { … } #if !SANITIZER_FREEBSD && !SANITIZER_NETBSD INTERCEPTOR(void *, memalign, SIZE_T alignment, SIZE_T size) { … } #define MSAN_MAYBE_INTERCEPT_MEMALIGN … #else #define MSAN_MAYBE_INTERCEPT_MEMALIGN #endif INTERCEPTOR(void *, aligned_alloc, SIZE_T alignment, SIZE_T size) { … } #if !SANITIZER_NETBSD INTERCEPTOR(void *, __libc_memalign, SIZE_T alignment, SIZE_T size) { … } #define MSAN_MAYBE_INTERCEPT___LIBC_MEMALIGN … #else #define MSAN_MAYBE_INTERCEPT___LIBC_MEMALIGN #endif INTERCEPTOR(void *, valloc, SIZE_T size) { … } #if !SANITIZER_FREEBSD && !SANITIZER_NETBSD INTERCEPTOR(void *, pvalloc, SIZE_T size) { … } #define MSAN_MAYBE_INTERCEPT_PVALLOC … #else #define MSAN_MAYBE_INTERCEPT_PVALLOC #endif INTERCEPTOR(void, free, void *ptr) { … } #if !SANITIZER_FREEBSD && !SANITIZER_NETBSD INTERCEPTOR(void, cfree, void *ptr) { … } #define MSAN_MAYBE_INTERCEPT_CFREE … #else #define MSAN_MAYBE_INTERCEPT_CFREE #endif #if !SANITIZER_NETBSD INTERCEPTOR(uptr, malloc_usable_size, void *ptr) { … } #define MSAN_MAYBE_INTERCEPT_MALLOC_USABLE_SIZE … #else #define MSAN_MAYBE_INTERCEPT_MALLOC_USABLE_SIZE #endif #if (!SANITIZER_FREEBSD && !SANITIZER_NETBSD) || __GLIBC_PREREQ(2, 33) template <class T> static NOINLINE void clear_mallinfo(T *sret) { … } #endif #if !SANITIZER_FREEBSD && !SANITIZER_NETBSD // Interceptors use NRVO and assume that sret will be pre-allocated in // caller frame. INTERCEPTOR(__sanitizer_struct_mallinfo, mallinfo,) { … } #define MSAN_MAYBE_INTERCEPT_MALLINFO … #else #define MSAN_MAYBE_INTERCEPT_MALLINFO #endif #if __GLIBC_PREREQ(2, 33) INTERCEPTOR(__sanitizer_struct_mallinfo2, mallinfo2) { … } #define MSAN_MAYBE_INTERCEPT_MALLINFO2 … #else #define MSAN_MAYBE_INTERCEPT_MALLINFO2 #endif #if !SANITIZER_FREEBSD && !SANITIZER_NETBSD INTERCEPTOR(int, mallopt, int cmd, int value) { … } #define MSAN_MAYBE_INTERCEPT_MALLOPT … #else #define MSAN_MAYBE_INTERCEPT_MALLOPT #endif #if !SANITIZER_FREEBSD && !SANITIZER_NETBSD INTERCEPTOR(void, malloc_stats, void) { … } #define MSAN_MAYBE_INTERCEPT_MALLOC_STATS … #else #define MSAN_MAYBE_INTERCEPT_MALLOC_STATS #endif INTERCEPTOR(char *, strcpy, char *dest, const char *src) { … } INTERCEPTOR(char *, strncpy, char *dest, const char *src, SIZE_T n) { … } #if !SANITIZER_NETBSD INTERCEPTOR(char *, stpcpy, char *dest, const char *src) { … } INTERCEPTOR(char *, stpncpy, char *dest, const char *src, SIZE_T n) { … } #define MSAN_MAYBE_INTERCEPT_STPCPY … #define MSAN_MAYBE_INTERCEPT_STPNCPY … #else #define MSAN_MAYBE_INTERCEPT_STPCPY #define MSAN_MAYBE_INTERCEPT_STPNCPY #endif INTERCEPTOR(char *, strdup, char *src) { … } #if !SANITIZER_FREEBSD && !SANITIZER_NETBSD INTERCEPTOR(char *, __strdup, char *src) { … } #define MSAN_MAYBE_INTERCEPT___STRDUP … #else #define MSAN_MAYBE_INTERCEPT___STRDUP #endif #if !SANITIZER_NETBSD INTERCEPTOR(char *, gcvt, double number, SIZE_T ndigit, char *buf) { … } #define MSAN_MAYBE_INTERCEPT_GCVT … #else #define MSAN_MAYBE_INTERCEPT_GCVT #endif INTERCEPTOR(char *, strcat, char *dest, const char *src) { … } INTERCEPTOR(char *, strncat, char *dest, const char *src, SIZE_T n) { … } // Hack: always pass nptr and endptr as part of __VA_ARGS_ to avoid having to // deal with empty __VA_ARGS__ in the case of INTERCEPTOR_STRTO. #define INTERCEPTOR_STRTO_BODY(ret_type, func, ...) … // On s390x, long double return values are passed via implicit reference, // which needs to be unpoisoned. We make the implicit pointer explicit. #define INTERCEPTOR_STRTO_SRET_BODY(func, sret, ...) … #define INTERCEPTOR_STRTO(ret_type, func, char_type) … #define INTERCEPTOR_STRTO_SRET(ret_type, func, char_type) … #define INTERCEPTOR_STRTO_BASE(ret_type, func, char_type) … #define INTERCEPTOR_STRTO_LOC(ret_type, func, char_type) … #define INTERCEPTOR_STRTO_SRET_LOC(ret_type, func, char_type) … #define INTERCEPTOR_STRTO_BASE_LOC(ret_type, func, char_type) … #if SANITIZER_NETBSD #define INTERCEPTORS_STRTO … #define INTERCEPTORS_STRTO_SRET … #define INTERCEPTORS_STRTO_BASE … #else #define INTERCEPTORS_STRTO(ret_type, func, char_type) … #define INTERCEPTORS_STRTO_SRET(ret_type, func, char_type) … #define INTERCEPTORS_STRTO_BASE(ret_type, func, char_type) … #endif INTERCEPTORS_STRTO(…) INTERCEPTORS_STRTO(…) #ifdef __s390x__ INTERCEPTORS_STRTO_SRET(long double, strtold, char) #else INTERCEPTORS_STRTO(…) #endif INTERCEPTORS_STRTO_BASE(…) INTERCEPTORS_STRTO_BASE(…) INTERCEPTORS_STRTO_BASE(…) INTERCEPTORS_STRTO_BASE(…) INTERCEPTORS_STRTO_BASE(…) INTERCEPTORS_STRTO(…) INTERCEPTORS_STRTO(…) #ifdef __s390x__ INTERCEPTORS_STRTO_SRET(long double, wcstold, wchar_t) #else INTERCEPTORS_STRTO(…) #endif INTERCEPTORS_STRTO_BASE(…) INTERCEPTORS_STRTO_BASE(…) INTERCEPTORS_STRTO_BASE(…) INTERCEPTORS_STRTO_BASE(…) #if SANITIZER_GLIBC INTERCEPTORS_STRTO(…) INTERCEPTORS_STRTO(…) #ifdef __s390x__ INTERCEPTORS_STRTO_SRET(long double, __isoc23_strtold, char) #else INTERCEPTORS_STRTO(…) #endif INTERCEPTORS_STRTO_BASE(…) INTERCEPTORS_STRTO_BASE(…) INTERCEPTORS_STRTO_BASE(…) INTERCEPTORS_STRTO_BASE(…) INTERCEPTORS_STRTO_BASE(…) INTERCEPTORS_STRTO(…) INTERCEPTORS_STRTO(…) #ifdef __s390x__ INTERCEPTORS_STRTO_SRET(long double, __isoc23_wcstold, wchar_t) #else INTERCEPTORS_STRTO(…) #endif INTERCEPTORS_STRTO_BASE(…) INTERCEPTORS_STRTO_BASE(…) INTERCEPTORS_STRTO_BASE(…) INTERCEPTORS_STRTO_BASE(…) #endif #if SANITIZER_NETBSD #define INTERCEPT_STRTO … #else #define INTERCEPT_STRTO(func) … #define INTERCEPT_STRTO_VER(func, ver) … #endif // FIXME: support *wprintf in common format interceptors. INTERCEPTOR(int, vswprintf, void *str, uptr size, void *format, va_list ap) { … } INTERCEPTOR(int, swprintf, void *str, uptr size, void *format, ...) { … } #define INTERCEPTOR_STRFTIME_BODY(char_type, ret_type, func, s, ...) … INTERCEPTOR(SIZE_T, strftime, char *s, SIZE_T max, const char *format, __sanitizer_tm *tm) { … } INTERCEPTOR(SIZE_T, strftime_l, char *s, SIZE_T max, const char *format, __sanitizer_tm *tm, void *loc) { … } #if !SANITIZER_FREEBSD && !SANITIZER_NETBSD INTERCEPTOR(SIZE_T, __strftime_l, char *s, SIZE_T max, const char *format, __sanitizer_tm *tm, void *loc) { … } #define MSAN_MAYBE_INTERCEPT___STRFTIME_L … #else #define MSAN_MAYBE_INTERCEPT___STRFTIME_L #endif INTERCEPTOR(SIZE_T, wcsftime, wchar_t *s, SIZE_T max, const wchar_t *format, __sanitizer_tm *tm) { … } INTERCEPTOR(SIZE_T, wcsftime_l, wchar_t *s, SIZE_T max, const wchar_t *format, __sanitizer_tm *tm, void *loc) { … } #if !SANITIZER_FREEBSD && !SANITIZER_NETBSD INTERCEPTOR(SIZE_T, __wcsftime_l, wchar_t *s, SIZE_T max, const wchar_t *format, __sanitizer_tm *tm, void *loc) { … } #define MSAN_MAYBE_INTERCEPT___WCSFTIME_L … #else #define MSAN_MAYBE_INTERCEPT___WCSFTIME_L #endif INTERCEPTOR(int, mbtowc, wchar_t *dest, const char *src, SIZE_T n) { … } INTERCEPTOR(SIZE_T, mbrtowc, wchar_t *dest, const char *src, SIZE_T n, void *ps) { … } // wchar_t *wmemcpy(wchar_t *dest, const wchar_t *src, SIZE_T n); INTERCEPTOR(wchar_t *, wmemcpy, wchar_t *dest, const wchar_t *src, SIZE_T n) { … } #if !SANITIZER_NETBSD INTERCEPTOR(wchar_t *, wmempcpy, wchar_t *dest, const wchar_t *src, SIZE_T n) { … } #define MSAN_MAYBE_INTERCEPT_WMEMPCPY … #else #define MSAN_MAYBE_INTERCEPT_WMEMPCPY #endif INTERCEPTOR(wchar_t *, wmemset, wchar_t *s, wchar_t c, SIZE_T n) { … } INTERCEPTOR(wchar_t *, wmemmove, wchar_t *dest, const wchar_t *src, SIZE_T n) { … } INTERCEPTOR(int, wcscmp, const wchar_t *s1, const wchar_t *s2) { … } INTERCEPTOR(int, gettimeofday, void *tv, void *tz) { … } #if !SANITIZER_NETBSD INTERCEPTOR(char *, fcvt, double x, int a, int *b, int *c) { … } #define MSAN_MAYBE_INTERCEPT_FCVT … #else #define MSAN_MAYBE_INTERCEPT_FCVT #endif INTERCEPTOR(char *, getenv, char *name) { … } extern char **environ; static void UnpoisonEnviron() { … } INTERCEPTOR(int, setenv, const char *name, const char *value, int overwrite) { … } INTERCEPTOR(int, putenv, char *string) { … } #define SANITIZER_STAT_LINUX … #if SANITIZER_FREEBSD || SANITIZER_NETBSD || SANITIZER_STAT_LINUX INTERCEPTOR(int, fstat, int fd, void *buf) { … } #define MSAN_MAYBE_INTERCEPT_FSTAT … #else #define MSAN_MAYBE_INTERCEPT_FSTAT #endif #if SANITIZER_STAT_LINUX INTERCEPTOR(int, fstat64, int fd, void *buf) { … } #define MSAN_MAYBE_INTERCEPT_FSTAT64 … #else #define MSAN_MAYBE_INTERCEPT_FSTAT64 #endif #if SANITIZER_GLIBC INTERCEPTOR(int, __fxstat, int magic, int fd, void *buf) { … } #define MSAN_MAYBE_INTERCEPT___FXSTAT … #else #define MSAN_MAYBE_INTERCEPT___FXSTAT #endif #if SANITIZER_GLIBC INTERCEPTOR(int, __fxstat64, int magic, int fd, void *buf) { … } #define MSAN_MAYBE_INTERCEPT___FXSTAT64 … #else #define MSAN_MAYBE_INTERCEPT___FXSTAT64 #endif #if SANITIZER_FREEBSD || SANITIZER_NETBSD || SANITIZER_STAT_LINUX INTERCEPTOR(int, fstatat, int fd, char *pathname, void *buf, int flags) { … } #define MSAN_MAYBE_INTERCEPT_FSTATAT … #else #define MSAN_MAYBE_INTERCEPT_FSTATAT #endif #if SANITIZER_STAT_LINUX INTERCEPTOR(int, fstatat64, int fd, char *pathname, void *buf, int flags) { … } #define MSAN_MAYBE_INTERCEPT_FSTATAT64 … #else #define MSAN_MAYBE_INTERCEPT_FSTATAT64 #endif #if SANITIZER_GLIBC INTERCEPTOR(int, __fxstatat, int magic, int fd, char *pathname, void *buf, int flags) { … } #define MSAN_MAYBE_INTERCEPT___FXSTATAT … #else #define MSAN_MAYBE_INTERCEPT___FXSTATAT #endif #if SANITIZER_GLIBC INTERCEPTOR(int, __fxstatat64, int magic, int fd, char *pathname, void *buf, int flags) { … } #define MSAN_MAYBE_INTERCEPT___FXSTATAT64 … #else #define MSAN_MAYBE_INTERCEPT___FXSTATAT64 #endif INTERCEPTOR(int, pipe, int pipefd[2]) { … } INTERCEPTOR(int, pipe2, int pipefd[2], int flags) { … } INTERCEPTOR(int, socketpair, int domain, int type, int protocol, int sv[2]) { … } #if !SANITIZER_FREEBSD && !SANITIZER_NETBSD INTERCEPTOR(char *, fgets_unlocked, char *s, int size, void *stream) { … } #define MSAN_MAYBE_INTERCEPT_FGETS_UNLOCKED … #else #define MSAN_MAYBE_INTERCEPT_FGETS_UNLOCKED #endif #define INTERCEPTOR_GETRLIMIT_BODY(func, resource, rlim) … INTERCEPTOR(int, getrlimit, int resource, void *rlim) { … } #if !SANITIZER_FREEBSD && !SANITIZER_NETBSD INTERCEPTOR(int, __getrlimit, int resource, void *rlim) { … } INTERCEPTOR(int, getrlimit64, int resource, void *rlim) { … } INTERCEPTOR(int, prlimit, int pid, int resource, void *new_rlimit, void *old_rlimit) { … } INTERCEPTOR(int, prlimit64, int pid, int resource, void *new_rlimit, void *old_rlimit) { … } #define MSAN_MAYBE_INTERCEPT___GETRLIMIT … #define MSAN_MAYBE_INTERCEPT_GETRLIMIT64 … #define MSAN_MAYBE_INTERCEPT_PRLIMIT … #define MSAN_MAYBE_INTERCEPT_PRLIMIT64 … #else #define MSAN_MAYBE_INTERCEPT___GETRLIMIT #define MSAN_MAYBE_INTERCEPT_GETRLIMIT64 #define MSAN_MAYBE_INTERCEPT_PRLIMIT #define MSAN_MAYBE_INTERCEPT_PRLIMIT64 #endif INTERCEPTOR(int, gethostname, char *name, SIZE_T len) { … } #if !SANITIZER_FREEBSD && !SANITIZER_NETBSD INTERCEPTOR(int, epoll_wait, int epfd, void *events, int maxevents, int timeout) { … } #define MSAN_MAYBE_INTERCEPT_EPOLL_WAIT … #else #define MSAN_MAYBE_INTERCEPT_EPOLL_WAIT #endif #if !SANITIZER_FREEBSD && !SANITIZER_NETBSD INTERCEPTOR(int, epoll_pwait, int epfd, void *events, int maxevents, int timeout, void *sigmask) { … } #define MSAN_MAYBE_INTERCEPT_EPOLL_PWAIT … #else #define MSAN_MAYBE_INTERCEPT_EPOLL_PWAIT #endif INTERCEPTOR(void *, calloc, SIZE_T nmemb, SIZE_T size) { … } INTERCEPTOR(void *, realloc, void *ptr, SIZE_T size) { … } INTERCEPTOR(void *, reallocarray, void *ptr, SIZE_T nmemb, SIZE_T size) { … } INTERCEPTOR(void *, malloc, SIZE_T size) { … } void __msan_allocated_memory(const void *data, uptr size) { … } void __msan_copy_shadow(void *dest, const void *src, uptr n) { … } void __sanitizer_dtor_callback(const void *data, uptr size) { … } void __sanitizer_dtor_callback_fields(const void *data, uptr size) { … } void __sanitizer_dtor_callback_vptr(const void *data) { … } template <class Mmap> static void *mmap_interceptor(Mmap real_mmap, void *addr, SIZE_T length, int prot, int flags, int fd, OFF64_T offset) { … } INTERCEPTOR(int, getrusage, int who, void *usage) { … } class SignalHandlerScope { … }; // sigactions_mu guarantees atomicity of sigaction() and signal() calls. // Access to sigactions[] is gone with relaxed atomics to avoid data race with // the signal handler. const int kMaxSignals = …; static atomic_uintptr_t sigactions[kMaxSignals]; static StaticSpinMutex sigactions_mu; static void SignalHandler(int signo) { … } static void SignalAction(int signo, void *si, void *uc) { … } static void read_sigaction(const __sanitizer_sigaction *act) { … } extern "C" int pthread_attr_init(void *attr); extern "C" int pthread_attr_destroy(void *attr); static void *MsanThreadStartFunc(void *arg) { … } INTERCEPTOR(int, pthread_create, void *th, void *attr, void *(*callback)(void*), void * param) { … } INTERCEPTOR(int, pthread_key_create, __sanitizer_pthread_key_t *key, void (*dtor)(void *value)) { … } #if SANITIZER_NETBSD INTERCEPTOR(int, __libc_thr_keycreate, __sanitizer_pthread_key_t *m, void (*dtor)(void *value)) ALIAS(WRAP(pthread_key_create)); #endif INTERCEPTOR(int, pthread_join, void *thread, void **retval) { … } #if SANITIZER_GLIBC INTERCEPTOR(int, pthread_tryjoin_np, void *thread, void **retval) { … } INTERCEPTOR(int, pthread_timedjoin_np, void *thread, void **retval, const struct timespec *abstime) { … } #endif DEFINE_INTERNAL_PTHREAD_FUNCTIONS extern char *tzname[2]; INTERCEPTOR(void, tzset, int fake) { … } struct MSanAtExitRecord { … }; struct InterceptorContext { … }; alignas(64) static char interceptor_placeholder[sizeof(InterceptorContext)]; InterceptorContext *interceptor_ctx() { … } void MSanAtExitWrapper() { … } void MSanCxaAtExitWrapper(void *arg) { … } static int setup_at_exit_wrapper(void(*f)(), void *arg, void *dso); // Unpoison argument shadow for C++ module destructors. INTERCEPTOR(int, __cxa_atexit, void (*func)(void *), void *arg, void *dso_handle) { … } // Unpoison argument shadow for C++ module destructors. INTERCEPTOR(int, atexit, void (*func)()) { … } static int setup_at_exit_wrapper(void(*f)(), void *arg, void *dso) { … } // NetBSD ships with openpty(3) in -lutil, that needs to be prebuilt explicitly // with MSan. #if SANITIZER_LINUX INTERCEPTOR(int, openpty, int *aparent, int *aworker, char *name, const void *termp, const void *winp) { … } #define MSAN_MAYBE_INTERCEPT_OPENPTY … #else #define MSAN_MAYBE_INTERCEPT_OPENPTY #endif // NetBSD ships with forkpty(3) in -lutil, that needs to be prebuilt explicitly // with MSan. #if SANITIZER_LINUX INTERCEPTOR(int, forkpty, int *aparent, char *name, const void *termp, const void *winp) { … } #define MSAN_MAYBE_INTERCEPT_FORKPTY … #else #define MSAN_MAYBE_INTERCEPT_FORKPTY #endif struct MSanInterceptorContext { … }; namespace __msan { int OnExit() { … } } // namespace __msan // A version of CHECK_UNPOISONED using a saved scope value. Used in common // interceptors. #define CHECK_UNPOISONED_CTX(ctx, x, n) … #define MSAN_INTERCEPT_FUNC(name) … #define MSAN_INTERCEPT_FUNC_VER(name, ver) … #define MSAN_INTERCEPT_FUNC_VER_UNVERSIONED_FALLBACK(name, ver) … #define COMMON_INTERCEPT_FUNCTION(name) … #define COMMON_INTERCEPT_FUNCTION_VER(name, ver) … #define COMMON_INTERCEPT_FUNCTION_VER_UNVERSIONED_FALLBACK(name, ver) … #define COMMON_INTERCEPTOR_UNPOISON_PARAM(count) … #define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) … #define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) … #define COMMON_INTERCEPTOR_INITIALIZE_RANGE(ptr, size) … #define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) … #define COMMON_INTERCEPTOR_DIR_ACQUIRE(ctx, path) … #define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) … #define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd) … #define COMMON_INTERCEPTOR_FD_SOCKET_ACCEPT(ctx, fd, newfd) … #define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name) … #define COMMON_INTERCEPTOR_SET_PTHREAD_NAME(ctx, thread, name) … #define COMMON_INTERCEPTOR_BLOCK_REAL(name) … #define COMMON_INTERCEPTOR_ON_EXIT(ctx) … #define COMMON_INTERCEPTOR_LIBRARY_LOADED(filename, handle) … #define COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED … #define COMMON_INTERCEPTOR_GET_TLS_RANGE(begin, end) … #define COMMON_INTERCEPTOR_MEMSET_IMPL(ctx, block, c, size) … #define COMMON_INTERCEPTOR_MEMMOVE_IMPL(ctx, to, from, size) … #define COMMON_INTERCEPTOR_MEMCPY_IMPL(ctx, to, from, size) … #define COMMON_INTERCEPTOR_COPY_STRING(ctx, to, from, size) … #define COMMON_INTERCEPTOR_MMAP_IMPL(ctx, mmap, addr, length, prot, flags, fd, \ offset) … #include "sanitizer_common/sanitizer_platform_interceptors.h" #include "sanitizer_common/sanitizer_common_interceptors_memintrinsics.inc" #include "sanitizer_common/sanitizer_common_interceptors.inc" static uptr signal_impl(int signo, uptr cb); static int sigaction_impl(int signo, const __sanitizer_sigaction *act, __sanitizer_sigaction *oldact); #define SIGNAL_INTERCEPTOR_SIGACTION_IMPL(signo, act, oldact) … #define SIGNAL_INTERCEPTOR_SIGNAL_IMPL(func, signo, handler) … #define SIGNAL_INTERCEPTOR_ENTER() … #include "sanitizer_common/sanitizer_signal_interceptors.inc" static int sigaction_impl(int signo, const __sanitizer_sigaction *act, __sanitizer_sigaction *oldact) { … } static uptr signal_impl(int signo, uptr cb) { … } #define COMMON_SYSCALL_PRE_READ_RANGE(p, s) … #define COMMON_SYSCALL_PRE_WRITE_RANGE(p, s) … #define COMMON_SYSCALL_POST_READ_RANGE(p, s) … #define COMMON_SYSCALL_POST_WRITE_RANGE(p, s) … #include "sanitizer_common/sanitizer_common_syscalls.inc" #include "sanitizer_common/sanitizer_syscalls_netbsd.inc" INTERCEPTOR(const char *, strsignal, int sig) { … } INTERCEPTOR(int, dladdr, void *addr, void *info) { … } #if SANITIZER_GLIBC INTERCEPTOR(int, dladdr1, void *addr, void *info, void **extra_info, int flags) { … } #define MSAN_MAYBE_INTERCEPT_DLADDR1 … #else #define MSAN_MAYBE_INTERCEPT_DLADDR1 #endif INTERCEPTOR(char *, dlerror, int fake) { … } dl_iterate_phdr_cb; struct dl_iterate_phdr_data { … }; static int msan_dl_iterate_phdr_cb(__sanitizer_dl_phdr_info *info, SIZE_T size, void *data) { … } INTERCEPTOR(void *, shmat, int shmid, const void *shmaddr, int shmflg) { … } INTERCEPTOR(int, dl_iterate_phdr, dl_iterate_phdr_cb callback, void *data) { … } // wchar_t *wcschr(const wchar_t *wcs, wchar_t wc); INTERCEPTOR(wchar_t *, wcschr, void *s, wchar_t wc, void *ps) { … } // wchar_t *wcscpy(wchar_t *dest, const wchar_t *src); INTERCEPTOR(wchar_t *, wcscpy, wchar_t *dest, const wchar_t *src) { … } INTERCEPTOR(wchar_t *, wcsncpy, wchar_t *dest, const wchar_t *src, SIZE_T n) { … } // These interface functions reside here so that they can use // REAL(memset), etc. void __msan_unpoison(const void *a, uptr size) { … } void __msan_poison(const void *a, uptr size) { … } void __msan_poison_stack(void *a, uptr size) { … } void __msan_unpoison_param(uptr n) { … } void __msan_clear_and_unpoison(void *a, uptr size) { … } void *__msan_memcpy(void *dest, const void *src, SIZE_T n) { … } void *__msan_memset(void *s, int c, SIZE_T n) { … } void *__msan_memmove(void *dest, const void *src, SIZE_T n) { … } void __msan_unpoison_string(const char* s) { … } namespace __msan { void InitializeInterceptors() { … } } // namespace __msan
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