diff options
Diffstat (limited to 'contrib/compiler-rt/lib/msan/msan_interceptors.cc')
-rw-r--r-- | contrib/compiler-rt/lib/msan/msan_interceptors.cc | 1575 |
1 files changed, 0 insertions, 1575 deletions
diff --git a/contrib/compiler-rt/lib/msan/msan_interceptors.cc b/contrib/compiler-rt/lib/msan/msan_interceptors.cc deleted file mode 100644 index 4a243941b8a3..000000000000 --- a/contrib/compiler-rt/lib/msan/msan_interceptors.cc +++ /dev/null @@ -1,1575 +0,0 @@ -//===-- msan_interceptors.cc ----------------------------------------------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// 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 -//===----------------------------------------------------------------------===// - -#include "interception/interception.h" -#include "msan.h" -#include "msan_chained_origin_depot.h" -#include "msan_origin.h" -#include "msan_thread.h" -#include "msan_poisoning.h" -#include "sanitizer_common/sanitizer_platform_limits_posix.h" -#include "sanitizer_common/sanitizer_allocator.h" -#include "sanitizer_common/sanitizer_allocator_interface.h" -#include "sanitizer_common/sanitizer_allocator_internal.h" -#include "sanitizer_common/sanitizer_atomic.h" -#include "sanitizer_common/sanitizer_common.h" -#include "sanitizer_common/sanitizer_stackdepot.h" -#include "sanitizer_common/sanitizer_libc.h" -#include "sanitizer_common/sanitizer_linux.h" -#include "sanitizer_common/sanitizer_tls_get_addr.h" - -#include <stdarg.h> -// ACHTUNG! No other system header includes in this file. -// Ideally, we should get rid of stdarg.h as well. - -using namespace __msan; - -using __sanitizer::memory_order; -using __sanitizer::atomic_load; -using __sanitizer::atomic_store; -using __sanitizer::atomic_uintptr_t; - -#if SANITIZER_FREEBSD -#define __errno_location __error -#endif - -// True if this is a nested interceptor. -static THREADLOCAL int in_interceptor_scope; - -extern "C" int *__errno_location(void); - -struct InterceptorScope { - InterceptorScope() { ++in_interceptor_scope; } - ~InterceptorScope() { --in_interceptor_scope; } -}; - -bool IsInInterceptorScope() { - return in_interceptor_scope; -} - -#define ENSURE_MSAN_INITED() do { \ - CHECK(!msan_init_is_running); \ - if (!msan_inited) { \ - __msan_init(); \ - } \ -} while (0) - -// Check that [x, x+n) range is unpoisoned. -#define CHECK_UNPOISONED_0(x, n) \ - do { \ - sptr offset = __msan_test_shadow(x, n); \ - if (__msan::IsInSymbolizer()) \ - break; \ - if (offset >= 0 && __msan::flags()->report_umrs) { \ - GET_CALLER_PC_BP_SP; \ - (void) sp; \ - ReportUMRInsideAddressRange(__func__, x, n, offset); \ - __msan::PrintWarningWithOrigin( \ - pc, bp, __msan_get_origin((const char *)x + offset)); \ - if (__msan::flags()->halt_on_error) { \ - Printf("Exiting\n"); \ - Die(); \ - } \ - } \ - } while (0) - -// Check that [x, x+n) range is unpoisoned unless we are in a nested -// interceptor. -#define CHECK_UNPOISONED(x, n) \ - do { \ - if (!IsInInterceptorScope()) CHECK_UNPOISONED_0(x, n); \ - } while (0); - -INTERCEPTOR(SIZE_T, fread, void *ptr, SIZE_T size, SIZE_T nmemb, void *file) { - ENSURE_MSAN_INITED(); - SIZE_T res = REAL(fread)(ptr, size, nmemb, file); - if (res > 0) - __msan_unpoison(ptr, res *size); - return res; -} - -#if !SANITIZER_FREEBSD -INTERCEPTOR(SIZE_T, fread_unlocked, void *ptr, SIZE_T size, SIZE_T nmemb, - void *file) { - ENSURE_MSAN_INITED(); - SIZE_T res = REAL(fread_unlocked)(ptr, size, nmemb, file); - if (res > 0) - __msan_unpoison(ptr, res *size); - return res; -} -#define MSAN_MAYBE_INTERCEPT_FREAD_UNLOCKED INTERCEPT_FUNCTION(fread_unlocked) -#else -#define MSAN_MAYBE_INTERCEPT_FREAD_UNLOCKED -#endif - -INTERCEPTOR(SSIZE_T, readlink, const char *path, char *buf, SIZE_T bufsiz) { - ENSURE_MSAN_INITED(); - SSIZE_T res = REAL(readlink)(path, buf, bufsiz); - if (res > 0) - __msan_unpoison(buf, res); - return res; -} - -INTERCEPTOR(void *, memcpy, void *dest, const void *src, SIZE_T n) { - return __msan_memcpy(dest, src, n); -} - -INTERCEPTOR(void *, mempcpy, void *dest, const void *src, SIZE_T n) { - return (char *)__msan_memcpy(dest, src, n) + n; -} - -INTERCEPTOR(void *, memccpy, void *dest, const void *src, int c, SIZE_T n) { - ENSURE_MSAN_INITED(); - void *res = REAL(memccpy)(dest, src, c, n); - CHECK(!res || (res >= dest && res <= (char *)dest + n)); - SIZE_T sz = res ? (char *)res - (char *)dest : n; - CHECK_UNPOISONED(src, sz); - __msan_unpoison(dest, sz); - return res; -} - -INTERCEPTOR(void *, memmove, void *dest, const void *src, SIZE_T n) { - return __msan_memmove(dest, src, n); -} - -INTERCEPTOR(void *, memset, void *s, int c, SIZE_T n) { - return __msan_memset(s, c, n); -} - -INTERCEPTOR(void *, bcopy, const void *src, void *dest, SIZE_T n) { - return __msan_memmove(dest, src, n); -} - -INTERCEPTOR(int, posix_memalign, void **memptr, SIZE_T alignment, SIZE_T size) { - GET_MALLOC_STACK_TRACE; - CHECK_EQ(alignment & (alignment - 1), 0); - CHECK_NE(memptr, 0); - *memptr = MsanReallocate(&stack, 0, size, alignment, false); - CHECK_NE(*memptr, 0); - __msan_unpoison(memptr, sizeof(*memptr)); - return 0; -} - -#if !SANITIZER_FREEBSD -INTERCEPTOR(void *, memalign, SIZE_T boundary, SIZE_T size) { - GET_MALLOC_STACK_TRACE; - CHECK_EQ(boundary & (boundary - 1), 0); - void *ptr = MsanReallocate(&stack, 0, size, boundary, false); - return ptr; -} -#define MSAN_MAYBE_INTERCEPT_MEMALIGN INTERCEPT_FUNCTION(memalign) -#else -#define MSAN_MAYBE_INTERCEPT_MEMALIGN -#endif - -INTERCEPTOR(void *, aligned_alloc, SIZE_T boundary, SIZE_T size) { - GET_MALLOC_STACK_TRACE; - CHECK_EQ(boundary & (boundary - 1), 0); - void *ptr = MsanReallocate(&stack, 0, size, boundary, false); - return ptr; -} - -INTERCEPTOR(void *, __libc_memalign, SIZE_T boundary, SIZE_T size) { - GET_MALLOC_STACK_TRACE; - CHECK_EQ(boundary & (boundary - 1), 0); - void *ptr = MsanReallocate(&stack, 0, size, boundary, false); - DTLS_on_libc_memalign(ptr, size * boundary); - return ptr; -} - -INTERCEPTOR(void *, valloc, SIZE_T size) { - GET_MALLOC_STACK_TRACE; - void *ptr = MsanReallocate(&stack, 0, size, GetPageSizeCached(), false); - return ptr; -} - -#if !SANITIZER_FREEBSD -INTERCEPTOR(void *, pvalloc, SIZE_T size) { - GET_MALLOC_STACK_TRACE; - uptr PageSize = GetPageSizeCached(); - size = RoundUpTo(size, PageSize); - if (size == 0) { - // pvalloc(0) should allocate one page. - size = PageSize; - } - void *ptr = MsanReallocate(&stack, 0, size, PageSize, false); - return ptr; -} -#define MSAN_MAYBE_INTERCEPT_PVALLOC INTERCEPT_FUNCTION(pvalloc) -#else -#define MSAN_MAYBE_INTERCEPT_PVALLOC -#endif - -INTERCEPTOR(void, free, void *ptr) { - GET_MALLOC_STACK_TRACE; - if (ptr == 0) return; - MsanDeallocate(&stack, ptr); -} - -#if !SANITIZER_FREEBSD -INTERCEPTOR(void, cfree, void *ptr) { - GET_MALLOC_STACK_TRACE; - if (ptr == 0) return; - MsanDeallocate(&stack, ptr); -} -#define MSAN_MAYBE_INTERCEPT_CFREE INTERCEPT_FUNCTION(cfree) -#else -#define MSAN_MAYBE_INTERCEPT_CFREE -#endif - -INTERCEPTOR(uptr, malloc_usable_size, void *ptr) { - return __sanitizer_get_allocated_size(ptr); -} - -#if !SANITIZER_FREEBSD -// This function actually returns a struct by value, but we can't unpoison a -// temporary! The following is equivalent on all supported platforms, and we -// have a test to confirm that. -INTERCEPTOR(void, mallinfo, __sanitizer_mallinfo *sret) { - REAL(memset)(sret, 0, sizeof(*sret)); - __msan_unpoison(sret, sizeof(*sret)); -} -#define MSAN_MAYBE_INTERCEPT_MALLINFO INTERCEPT_FUNCTION(mallinfo) -#else -#define MSAN_MAYBE_INTERCEPT_MALLINFO -#endif - -#if !SANITIZER_FREEBSD -INTERCEPTOR(int, mallopt, int cmd, int value) { - return -1; -} -#define MSAN_MAYBE_INTERCEPT_MALLOPT INTERCEPT_FUNCTION(mallopt) -#else -#define MSAN_MAYBE_INTERCEPT_MALLOPT -#endif - -#if !SANITIZER_FREEBSD -INTERCEPTOR(void, malloc_stats, void) { - // FIXME: implement, but don't call REAL(malloc_stats)! -} -#define MSAN_MAYBE_INTERCEPT_MALLOC_STATS INTERCEPT_FUNCTION(malloc_stats) -#else -#define MSAN_MAYBE_INTERCEPT_MALLOC_STATS -#endif - -INTERCEPTOR(SIZE_T, strlen, const char *s) { - if (msan_init_is_running) - return REAL(strlen)(s); - ENSURE_MSAN_INITED(); - SIZE_T res = REAL(strlen)(s); - CHECK_UNPOISONED(s, res + 1); - return res; -} - -INTERCEPTOR(SIZE_T, strnlen, const char *s, SIZE_T n) { - ENSURE_MSAN_INITED(); - SIZE_T res = REAL(strnlen)(s, n); - SIZE_T scan_size = (res == n) ? res : res + 1; - CHECK_UNPOISONED(s, scan_size); - return res; -} - -// FIXME: Add stricter shadow checks in str* interceptors (ex.: strcpy should -// check the shadow of the terminating \0 byte). - -INTERCEPTOR(char *, strcpy, char *dest, const char *src) { // NOLINT - ENSURE_MSAN_INITED(); - GET_STORE_STACK_TRACE; - SIZE_T n = REAL(strlen)(src); - char *res = REAL(strcpy)(dest, src); // NOLINT - CopyShadowAndOrigin(dest, src, n + 1, &stack); - return res; -} - -INTERCEPTOR(char *, strncpy, char *dest, const char *src, SIZE_T n) { // NOLINT - ENSURE_MSAN_INITED(); - GET_STORE_STACK_TRACE; - SIZE_T copy_size = REAL(strnlen)(src, n); - if (copy_size < n) - copy_size++; // trailing \0 - char *res = REAL(strncpy)(dest, src, n); // NOLINT - CopyShadowAndOrigin(dest, src, copy_size, &stack); - __msan_unpoison(dest + copy_size, n - copy_size); - return res; -} - -INTERCEPTOR(char *, stpcpy, char *dest, const char *src) { // NOLINT - ENSURE_MSAN_INITED(); - GET_STORE_STACK_TRACE; - SIZE_T n = REAL(strlen)(src); - char *res = REAL(stpcpy)(dest, src); // NOLINT - CopyShadowAndOrigin(dest, src, n + 1, &stack); - return res; -} - -INTERCEPTOR(char *, strdup, char *src) { - ENSURE_MSAN_INITED(); - GET_STORE_STACK_TRACE; - // On FreeBSD strdup() leverages strlen(). - InterceptorScope interceptor_scope; - SIZE_T n = REAL(strlen)(src); - char *res = REAL(strdup)(src); - CopyShadowAndOrigin(res, src, n + 1, &stack); - return res; -} - -#if !SANITIZER_FREEBSD -INTERCEPTOR(char *, __strdup, char *src) { - ENSURE_MSAN_INITED(); - GET_STORE_STACK_TRACE; - SIZE_T n = REAL(strlen)(src); - char *res = REAL(__strdup)(src); - CopyShadowAndOrigin(res, src, n + 1, &stack); - return res; -} -#define MSAN_MAYBE_INTERCEPT___STRDUP INTERCEPT_FUNCTION(__strdup) -#else -#define MSAN_MAYBE_INTERCEPT___STRDUP -#endif - -INTERCEPTOR(char *, strndup, char *src, SIZE_T n) { - ENSURE_MSAN_INITED(); - GET_STORE_STACK_TRACE; - // On FreeBSD strndup() leverages strnlen(). - InterceptorScope interceptor_scope; - SIZE_T copy_size = REAL(strnlen)(src, n); - char *res = REAL(strndup)(src, n); - CopyShadowAndOrigin(res, src, copy_size, &stack); - __msan_unpoison(res + copy_size, 1); // \0 - return res; -} - -#if !SANITIZER_FREEBSD -INTERCEPTOR(char *, __strndup, char *src, SIZE_T n) { - ENSURE_MSAN_INITED(); - GET_STORE_STACK_TRACE; - SIZE_T copy_size = REAL(strnlen)(src, n); - char *res = REAL(__strndup)(src, n); - CopyShadowAndOrigin(res, src, copy_size, &stack); - __msan_unpoison(res + copy_size, 1); // \0 - return res; -} -#define MSAN_MAYBE_INTERCEPT___STRNDUP INTERCEPT_FUNCTION(__strndup) -#else -#define MSAN_MAYBE_INTERCEPT___STRNDUP -#endif - -INTERCEPTOR(char *, gcvt, double number, SIZE_T ndigit, char *buf) { - ENSURE_MSAN_INITED(); - char *res = REAL(gcvt)(number, ndigit, buf); - SIZE_T n = REAL(strlen)(buf); - __msan_unpoison(buf, n + 1); - return res; -} - -INTERCEPTOR(char *, strcat, char *dest, const char *src) { // NOLINT - ENSURE_MSAN_INITED(); - GET_STORE_STACK_TRACE; - SIZE_T src_size = REAL(strlen)(src); - SIZE_T dest_size = REAL(strlen)(dest); - char *res = REAL(strcat)(dest, src); // NOLINT - CopyShadowAndOrigin(dest + dest_size, src, src_size + 1, &stack); - return res; -} - -INTERCEPTOR(char *, strncat, char *dest, const char *src, SIZE_T n) { // NOLINT - ENSURE_MSAN_INITED(); - GET_STORE_STACK_TRACE; - SIZE_T dest_size = REAL(strlen)(dest); - SIZE_T copy_size = REAL(strnlen)(src, n); - char *res = REAL(strncat)(dest, src, n); // NOLINT - CopyShadowAndOrigin(dest + dest_size, src, copy_size, &stack); - __msan_unpoison(dest + dest_size + copy_size, 1); // \0 - return res; -} - -// 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, ...) \ - ENSURE_MSAN_INITED(); \ - ret_type res = REAL(func)(__VA_ARGS__); \ - __msan_unpoison(endptr, sizeof(*endptr)); \ - return res; - -#define INTERCEPTOR_STRTO(ret_type, func, char_type) \ - INTERCEPTOR(ret_type, func, const char_type *nptr, char_type **endptr) { \ - INTERCEPTOR_STRTO_BODY(ret_type, func, nptr, endptr); \ - } - -#define INTERCEPTOR_STRTO_BASE(ret_type, func, char_type) \ - INTERCEPTOR(ret_type, func, const char_type *nptr, char_type **endptr, \ - int base) { \ - INTERCEPTOR_STRTO_BODY(ret_type, func, nptr, endptr, base); \ - } - -#define INTERCEPTOR_STRTO_LOC(ret_type, func, char_type) \ - INTERCEPTOR(ret_type, func, const char_type *nptr, char_type **endptr, \ - void *loc) { \ - INTERCEPTOR_STRTO_BODY(ret_type, func, nptr, endptr, loc); \ - } - -#define INTERCEPTOR_STRTO_BASE_LOC(ret_type, func, char_type) \ - INTERCEPTOR(ret_type, func, const char_type *nptr, char_type **endptr, \ - int base, void *loc) { \ - INTERCEPTOR_STRTO_BODY(ret_type, func, nptr, endptr, base, loc); \ - } - -#define INTERCEPTORS_STRTO(ret_type, func, char_type) \ - INTERCEPTOR_STRTO(ret_type, func, char_type) \ - INTERCEPTOR_STRTO_LOC(ret_type, func##_l, char_type) \ - INTERCEPTOR_STRTO_LOC(ret_type, __##func##_l, char_type) \ - INTERCEPTOR_STRTO_LOC(ret_type, __##func##_internal, char_type) - -#define INTERCEPTORS_STRTO_BASE(ret_type, func, char_type) \ - INTERCEPTOR_STRTO_BASE(ret_type, func, char_type) \ - INTERCEPTOR_STRTO_BASE_LOC(ret_type, func##_l, char_type) \ - INTERCEPTOR_STRTO_BASE_LOC(ret_type, __##func##_l, char_type) \ - INTERCEPTOR_STRTO_BASE_LOC(ret_type, __##func##_internal, char_type) - -INTERCEPTORS_STRTO(double, strtod, char) // NOLINT -INTERCEPTORS_STRTO(float, strtof, char) // NOLINT -INTERCEPTORS_STRTO(long double, strtold, char) // NOLINT -INTERCEPTORS_STRTO_BASE(long, strtol, char) // NOLINT -INTERCEPTORS_STRTO_BASE(long long, strtoll, char) // NOLINT -INTERCEPTORS_STRTO_BASE(unsigned long, strtoul, char) // NOLINT -INTERCEPTORS_STRTO_BASE(unsigned long long, strtoull, char) // NOLINT - -INTERCEPTORS_STRTO(double, wcstod, wchar_t) // NOLINT -INTERCEPTORS_STRTO(float, wcstof, wchar_t) // NOLINT -INTERCEPTORS_STRTO(long double, wcstold, wchar_t) // NOLINT -INTERCEPTORS_STRTO_BASE(long, wcstol, wchar_t) // NOLINT -INTERCEPTORS_STRTO_BASE(long long, wcstoll, wchar_t) // NOLINT -INTERCEPTORS_STRTO_BASE(unsigned long, wcstoul, wchar_t) // NOLINT -INTERCEPTORS_STRTO_BASE(unsigned long long, wcstoull, wchar_t) // NOLINT - -#define INTERCEPT_STRTO(func) \ - INTERCEPT_FUNCTION(func); \ - INTERCEPT_FUNCTION(func##_l); \ - INTERCEPT_FUNCTION(__##func##_l); \ - INTERCEPT_FUNCTION(__##func##_internal); - - -// FIXME: support *wprintf in common format interceptors. -INTERCEPTOR(int, vswprintf, void *str, uptr size, void *format, va_list ap) { - ENSURE_MSAN_INITED(); - int res = REAL(vswprintf)(str, size, format, ap); - if (res >= 0) { - __msan_unpoison(str, 4 * (res + 1)); - } - return res; -} - -INTERCEPTOR(int, swprintf, void *str, uptr size, void *format, ...) { - ENSURE_MSAN_INITED(); - va_list ap; - va_start(ap, format); - int res = vswprintf(str, size, format, ap); - va_end(ap); - return res; -} - -INTERCEPTOR(SIZE_T, strxfrm, char *dest, const char *src, SIZE_T n) { - ENSURE_MSAN_INITED(); - CHECK_UNPOISONED(src, REAL(strlen)(src) + 1); - SIZE_T res = REAL(strxfrm)(dest, src, n); - if (res < n) __msan_unpoison(dest, res + 1); - return res; -} - -INTERCEPTOR(SIZE_T, strxfrm_l, char *dest, const char *src, SIZE_T n, - void *loc) { - ENSURE_MSAN_INITED(); - CHECK_UNPOISONED(src, REAL(strlen)(src) + 1); - SIZE_T res = REAL(strxfrm_l)(dest, src, n, loc); - if (res < n) __msan_unpoison(dest, res + 1); - return res; -} - -#define INTERCEPTOR_STRFTIME_BODY(char_type, ret_type, func, s, ...) \ - ENSURE_MSAN_INITED(); \ - ret_type res = REAL(func)(s, __VA_ARGS__); \ - if (s) __msan_unpoison(s, sizeof(char_type) * (res + 1)); \ - return res; - -INTERCEPTOR(SIZE_T, strftime, char *s, SIZE_T max, const char *format, - __sanitizer_tm *tm) { - INTERCEPTOR_STRFTIME_BODY(char, SIZE_T, strftime, s, max, format, tm); -} - -INTERCEPTOR(SIZE_T, strftime_l, char *s, SIZE_T max, const char *format, - __sanitizer_tm *tm, void *loc) { - INTERCEPTOR_STRFTIME_BODY(char, SIZE_T, strftime_l, s, max, format, tm, loc); -} - -#if !SANITIZER_FREEBSD -INTERCEPTOR(SIZE_T, __strftime_l, char *s, SIZE_T max, const char *format, - __sanitizer_tm *tm, void *loc) { - INTERCEPTOR_STRFTIME_BODY(char, SIZE_T, __strftime_l, s, max, format, tm, - loc); -} -#define MSAN_MAYBE_INTERCEPT___STRFTIME_L INTERCEPT_FUNCTION(__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_STRFTIME_BODY(wchar_t, SIZE_T, wcsftime, s, max, format, tm); -} - -INTERCEPTOR(SIZE_T, wcsftime_l, wchar_t *s, SIZE_T max, const wchar_t *format, - __sanitizer_tm *tm, void *loc) { - INTERCEPTOR_STRFTIME_BODY(wchar_t, SIZE_T, wcsftime_l, s, max, format, tm, - loc); -} - -#if !SANITIZER_FREEBSD -INTERCEPTOR(SIZE_T, __wcsftime_l, wchar_t *s, SIZE_T max, const wchar_t *format, - __sanitizer_tm *tm, void *loc) { - INTERCEPTOR_STRFTIME_BODY(wchar_t, SIZE_T, __wcsftime_l, s, max, format, tm, - loc); -} -#define MSAN_MAYBE_INTERCEPT___WCSFTIME_L INTERCEPT_FUNCTION(__wcsftime_l) -#else -#define MSAN_MAYBE_INTERCEPT___WCSFTIME_L -#endif - -INTERCEPTOR(int, mbtowc, wchar_t *dest, const char *src, SIZE_T n) { - ENSURE_MSAN_INITED(); - int res = REAL(mbtowc)(dest, src, n); - if (res != -1 && dest) __msan_unpoison(dest, sizeof(wchar_t)); - return res; -} - -INTERCEPTOR(int, mbrtowc, wchar_t *dest, const char *src, SIZE_T n, void *ps) { - ENSURE_MSAN_INITED(); - SIZE_T res = REAL(mbrtowc)(dest, src, n, ps); - if (res != (SIZE_T)-1 && dest) __msan_unpoison(dest, sizeof(wchar_t)); - return res; -} - -INTERCEPTOR(SIZE_T, wcslen, const wchar_t *s) { - ENSURE_MSAN_INITED(); - SIZE_T res = REAL(wcslen)(s); - CHECK_UNPOISONED(s, sizeof(wchar_t) * (res + 1)); - return res; -} - -// wchar_t *wcschr(const wchar_t *wcs, wchar_t wc); -INTERCEPTOR(wchar_t *, wcschr, void *s, wchar_t wc, void *ps) { - ENSURE_MSAN_INITED(); - wchar_t *res = REAL(wcschr)(s, wc, ps); - return res; -} - -// wchar_t *wcscpy(wchar_t *dest, const wchar_t *src); -INTERCEPTOR(wchar_t *, wcscpy, wchar_t *dest, const wchar_t *src) { - ENSURE_MSAN_INITED(); - GET_STORE_STACK_TRACE; - wchar_t *res = REAL(wcscpy)(dest, src); - CopyShadowAndOrigin(dest, src, sizeof(wchar_t) * (REAL(wcslen)(src) + 1), - &stack); - return res; -} - -// 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) { - ENSURE_MSAN_INITED(); - GET_STORE_STACK_TRACE; - wchar_t *res = REAL(wmemcpy)(dest, src, n); - CopyShadowAndOrigin(dest, src, n * sizeof(wchar_t), &stack); - return res; -} - -INTERCEPTOR(wchar_t *, wmempcpy, wchar_t *dest, const wchar_t *src, SIZE_T n) { - ENSURE_MSAN_INITED(); - GET_STORE_STACK_TRACE; - wchar_t *res = REAL(wmempcpy)(dest, src, n); - CopyShadowAndOrigin(dest, src, n * sizeof(wchar_t), &stack); - return res; -} - -INTERCEPTOR(wchar_t *, wmemset, wchar_t *s, wchar_t c, SIZE_T n) { - CHECK(MEM_IS_APP(s)); - ENSURE_MSAN_INITED(); - wchar_t *res = REAL(wmemset)(s, c, n); - __msan_unpoison(s, n * sizeof(wchar_t)); - return res; -} - -INTERCEPTOR(wchar_t *, wmemmove, wchar_t *dest, const wchar_t *src, SIZE_T n) { - ENSURE_MSAN_INITED(); - GET_STORE_STACK_TRACE; - wchar_t *res = REAL(wmemmove)(dest, src, n); - MoveShadowAndOrigin(dest, src, n * sizeof(wchar_t), &stack); - return res; -} - -INTERCEPTOR(int, wcscmp, const wchar_t *s1, const wchar_t *s2) { - ENSURE_MSAN_INITED(); - int res = REAL(wcscmp)(s1, s2); - return res; -} - -INTERCEPTOR(int, gettimeofday, void *tv, void *tz) { - ENSURE_MSAN_INITED(); - int res = REAL(gettimeofday)(tv, tz); - if (tv) - __msan_unpoison(tv, 16); - if (tz) - __msan_unpoison(tz, 8); - return res; -} - -INTERCEPTOR(char *, fcvt, double x, int a, int *b, int *c) { - ENSURE_MSAN_INITED(); - char *res = REAL(fcvt)(x, a, b, c); - __msan_unpoison(b, sizeof(*b)); - __msan_unpoison(c, sizeof(*c)); - if (res) __msan_unpoison(res, REAL(strlen)(res) + 1); - return res; -} - -INTERCEPTOR(char *, getenv, char *name) { - if (msan_init_is_running) - return REAL(getenv)(name); - ENSURE_MSAN_INITED(); - char *res = REAL(getenv)(name); - if (res) __msan_unpoison(res, REAL(strlen)(res) + 1); - return res; -} - -extern char **environ; - -static void UnpoisonEnviron() { - char **envp = environ; - for (; *envp; ++envp) { - __msan_unpoison(envp, sizeof(*envp)); - __msan_unpoison(*envp, REAL(strlen)(*envp) + 1); - } - // Trailing NULL pointer. - __msan_unpoison(envp, sizeof(*envp)); -} - -INTERCEPTOR(int, setenv, const char *name, const char *value, int overwrite) { - ENSURE_MSAN_INITED(); - int res = REAL(setenv)(name, value, overwrite); - if (!res) UnpoisonEnviron(); - return res; -} - -INTERCEPTOR(int, putenv, char *string) { - ENSURE_MSAN_INITED(); - int res = REAL(putenv)(string); - if (!res) UnpoisonEnviron(); - return res; -} - -#if !SANITIZER_FREEBSD -INTERCEPTOR(int, __fxstat, int magic, int fd, void *buf) { - ENSURE_MSAN_INITED(); - int res = REAL(__fxstat)(magic, fd, buf); - if (!res) - __msan_unpoison(buf, __sanitizer::struct_stat_sz); - return res; -} -#define MSAN_MAYBE_INTERCEPT___FXSTAT INTERCEPT_FUNCTION(__fxstat) -#else -#define MSAN_MAYBE_INTERCEPT___FXSTAT -#endif - -#if !SANITIZER_FREEBSD -INTERCEPTOR(int, __fxstat64, int magic, int fd, void *buf) { - ENSURE_MSAN_INITED(); - int res = REAL(__fxstat64)(magic, fd, buf); - if (!res) - __msan_unpoison(buf, __sanitizer::struct_stat64_sz); - return res; -} -#define MSAN_MAYBE_INTERCEPT___FXSTAT64 INTERCEPT_FUNCTION(__fxstat64) -#else -#define MSAN_MAYBE_INTERCEPT___FXSTAT64 -#endif - -#if SANITIZER_FREEBSD -INTERCEPTOR(int, fstatat, int fd, char *pathname, void *buf, int flags) { - ENSURE_MSAN_INITED(); - int res = REAL(fstatat)(fd, pathname, buf, flags); - if (!res) __msan_unpoison(buf, __sanitizer::struct_stat_sz); - return res; -} -# define MSAN_INTERCEPT_FSTATAT INTERCEPT_FUNCTION(fstatat) -#else -INTERCEPTOR(int, __fxstatat, int magic, int fd, char *pathname, void *buf, - int flags) { - ENSURE_MSAN_INITED(); - int res = REAL(__fxstatat)(magic, fd, pathname, buf, flags); - if (!res) __msan_unpoison(buf, __sanitizer::struct_stat_sz); - return res; -} -# define MSAN_INTERCEPT_FSTATAT INTERCEPT_FUNCTION(__fxstatat) -#endif - -#if !SANITIZER_FREEBSD -INTERCEPTOR(int, __fxstatat64, int magic, int fd, char *pathname, void *buf, - int flags) { - ENSURE_MSAN_INITED(); - int res = REAL(__fxstatat64)(magic, fd, pathname, buf, flags); - if (!res) __msan_unpoison(buf, __sanitizer::struct_stat64_sz); - return res; -} -#define MSAN_MAYBE_INTERCEPT___FXSTATAT64 INTERCEPT_FUNCTION(__fxstatat64) -#else -#define MSAN_MAYBE_INTERCEPT___FXSTATAT64 -#endif - -#if SANITIZER_FREEBSD -INTERCEPTOR(int, stat, char *path, void *buf) { - ENSURE_MSAN_INITED(); - int res = REAL(stat)(path, buf); - if (!res) - __msan_unpoison(buf, __sanitizer::struct_stat_sz); - return res; -} -# define MSAN_INTERCEPT_STAT INTERCEPT_FUNCTION(stat) -#else -INTERCEPTOR(int, __xstat, int magic, char *path, void *buf) { - ENSURE_MSAN_INITED(); - int res = REAL(__xstat)(magic, path, buf); - if (!res) - __msan_unpoison(buf, __sanitizer::struct_stat_sz); - return res; -} -# define MSAN_INTERCEPT_STAT INTERCEPT_FUNCTION(__xstat) -#endif - -#if !SANITIZER_FREEBSD -INTERCEPTOR(int, __xstat64, int magic, char *path, void *buf) { - ENSURE_MSAN_INITED(); - int res = REAL(__xstat64)(magic, path, buf); - if (!res) - __msan_unpoison(buf, __sanitizer::struct_stat64_sz); - return res; -} -#define MSAN_MAYBE_INTERCEPT___XSTAT64 INTERCEPT_FUNCTION(__xstat64) -#else -#define MSAN_MAYBE_INTERCEPT___XSTAT64 -#endif - -#if !SANITIZER_FREEBSD -INTERCEPTOR(int, __lxstat, int magic, char *path, void *buf) { - ENSURE_MSAN_INITED(); - int res = REAL(__lxstat)(magic, path, buf); - if (!res) - __msan_unpoison(buf, __sanitizer::struct_stat_sz); - return res; -} -#define MSAN_MAYBE_INTERCEPT___LXSTAT INTERCEPT_FUNCTION(__lxstat) -#else -#define MSAN_MAYBE_INTERCEPT___LXSTAT -#endif - -#if !SANITIZER_FREEBSD -INTERCEPTOR(int, __lxstat64, int magic, char *path, void *buf) { - ENSURE_MSAN_INITED(); - int res = REAL(__lxstat64)(magic, path, buf); - if (!res) - __msan_unpoison(buf, __sanitizer::struct_stat64_sz); - return res; -} -#define MSAN_MAYBE_INTERCEPT___LXSTAT64 INTERCEPT_FUNCTION(__lxstat64) -#else -#define MSAN_MAYBE_INTERCEPT___LXSTAT64 -#endif - -INTERCEPTOR(int, pipe, int pipefd[2]) { - if (msan_init_is_running) - return REAL(pipe)(pipefd); - ENSURE_MSAN_INITED(); - int res = REAL(pipe)(pipefd); - if (!res) - __msan_unpoison(pipefd, sizeof(int[2])); - return res; -} - -INTERCEPTOR(int, pipe2, int pipefd[2], int flags) { - ENSURE_MSAN_INITED(); - int res = REAL(pipe2)(pipefd, flags); - if (!res) - __msan_unpoison(pipefd, sizeof(int[2])); - return res; -} - -INTERCEPTOR(int, socketpair, int domain, int type, int protocol, int sv[2]) { - ENSURE_MSAN_INITED(); - int res = REAL(socketpair)(domain, type, protocol, sv); - if (!res) - __msan_unpoison(sv, sizeof(int[2])); - return res; -} - -INTERCEPTOR(char *, fgets, char *s, int size, void *stream) { - ENSURE_MSAN_INITED(); - char *res = REAL(fgets)(s, size, stream); - if (res) - __msan_unpoison(s, REAL(strlen)(s) + 1); - return res; -} - -#if !SANITIZER_FREEBSD -INTERCEPTOR(char *, fgets_unlocked, char *s, int size, void *stream) { - ENSURE_MSAN_INITED(); - char *res = REAL(fgets_unlocked)(s, size, stream); - if (res) - __msan_unpoison(s, REAL(strlen)(s) + 1); - return res; -} -#define MSAN_MAYBE_INTERCEPT_FGETS_UNLOCKED INTERCEPT_FUNCTION(fgets_unlocked) -#else -#define MSAN_MAYBE_INTERCEPT_FGETS_UNLOCKED -#endif - -INTERCEPTOR(int, getrlimit, int resource, void *rlim) { - if (msan_init_is_running) - return REAL(getrlimit)(resource, rlim); - ENSURE_MSAN_INITED(); - int res = REAL(getrlimit)(resource, rlim); - if (!res) - __msan_unpoison(rlim, __sanitizer::struct_rlimit_sz); - return res; -} - -#if !SANITIZER_FREEBSD -INTERCEPTOR(int, getrlimit64, int resource, void *rlim) { - if (msan_init_is_running) - return REAL(getrlimit64)(resource, rlim); - ENSURE_MSAN_INITED(); - int res = REAL(getrlimit64)(resource, rlim); - if (!res) - __msan_unpoison(rlim, __sanitizer::struct_rlimit64_sz); - return res; -} -#define MSAN_MAYBE_INTERCEPT_GETRLIMIT64 INTERCEPT_FUNCTION(getrlimit64) -#else -#define MSAN_MAYBE_INTERCEPT_GETRLIMIT64 -#endif - -#if SANITIZER_FREEBSD -// FreeBSD's <sys/utsname.h> define uname() as -// static __inline int uname(struct utsname *name) { -// return __xuname(SYS_NMLN, (void*)name); -// } -INTERCEPTOR(int, __xuname, int size, void *utsname) { - ENSURE_MSAN_INITED(); - int res = REAL(__xuname)(size, utsname); - if (!res) - __msan_unpoison(utsname, __sanitizer::struct_utsname_sz); - return res; -} -#define MSAN_INTERCEPT_UNAME INTERCEPT_FUNCTION(__xuname) -#else -INTERCEPTOR(int, uname, struct utsname *utsname) { - ENSURE_MSAN_INITED(); - int res = REAL(uname)(utsname); - if (!res) - __msan_unpoison(utsname, __sanitizer::struct_utsname_sz); - return res; -} -#define MSAN_INTERCEPT_UNAME INTERCEPT_FUNCTION(uname) -#endif - -INTERCEPTOR(int, gethostname, char *name, SIZE_T len) { - ENSURE_MSAN_INITED(); - int res = REAL(gethostname)(name, len); - if (!res) { - SIZE_T real_len = REAL(strnlen)(name, len); - if (real_len < len) - ++real_len; - __msan_unpoison(name, real_len); - } - return res; -} - -#if !SANITIZER_FREEBSD -INTERCEPTOR(int, epoll_wait, int epfd, void *events, int maxevents, - int timeout) { - ENSURE_MSAN_INITED(); - int res = REAL(epoll_wait)(epfd, events, maxevents, timeout); - if (res > 0) { - __msan_unpoison(events, __sanitizer::struct_epoll_event_sz * res); - } - return res; -} -#define MSAN_MAYBE_INTERCEPT_EPOLL_WAIT INTERCEPT_FUNCTION(epoll_wait) -#else -#define MSAN_MAYBE_INTERCEPT_EPOLL_WAIT -#endif - -#if !SANITIZER_FREEBSD -INTERCEPTOR(int, epoll_pwait, int epfd, void *events, int maxevents, - int timeout, void *sigmask) { - ENSURE_MSAN_INITED(); - int res = REAL(epoll_pwait)(epfd, events, maxevents, timeout, sigmask); - if (res > 0) { - __msan_unpoison(events, __sanitizer::struct_epoll_event_sz * res); - } - return res; -} -#define MSAN_MAYBE_INTERCEPT_EPOLL_PWAIT INTERCEPT_FUNCTION(epoll_pwait) -#else -#define MSAN_MAYBE_INTERCEPT_EPOLL_PWAIT -#endif - -INTERCEPTOR(SSIZE_T, recv, int fd, void *buf, SIZE_T len, int flags) { - ENSURE_MSAN_INITED(); - SSIZE_T res = REAL(recv)(fd, buf, len, flags); - if (res > 0) - __msan_unpoison(buf, res); - return res; -} - -INTERCEPTOR(SSIZE_T, recvfrom, int fd, void *buf, SIZE_T len, int flags, - void *srcaddr, int *addrlen) { - ENSURE_MSAN_INITED(); - SIZE_T srcaddr_sz; - if (srcaddr) srcaddr_sz = *addrlen; - SSIZE_T res = REAL(recvfrom)(fd, buf, len, flags, srcaddr, addrlen); - if (res > 0) { - __msan_unpoison(buf, res); - if (srcaddr) { - SIZE_T sz = *addrlen; - __msan_unpoison(srcaddr, Min(sz, srcaddr_sz)); - } - } - return res; -} - -INTERCEPTOR(void *, calloc, SIZE_T nmemb, SIZE_T size) { - GET_MALLOC_STACK_TRACE; - if (UNLIKELY(!msan_inited)) { - // Hack: dlsym calls calloc before REAL(calloc) is retrieved from dlsym. - const SIZE_T kCallocPoolSize = 1024; - static uptr calloc_memory_for_dlsym[kCallocPoolSize]; - static SIZE_T allocated; - SIZE_T size_in_words = ((nmemb * size) + kWordSize - 1) / kWordSize; - void *mem = (void*)&calloc_memory_for_dlsym[allocated]; - allocated += size_in_words; - CHECK(allocated < kCallocPoolSize); - return mem; - } - return MsanCalloc(&stack, nmemb, size); -} - -INTERCEPTOR(void *, realloc, void *ptr, SIZE_T size) { - GET_MALLOC_STACK_TRACE; - return MsanReallocate(&stack, ptr, size, sizeof(u64), false); -} - -INTERCEPTOR(void *, malloc, SIZE_T size) { - GET_MALLOC_STACK_TRACE; - return MsanReallocate(&stack, 0, size, sizeof(u64), false); -} - -void __msan_allocated_memory(const void *data, uptr size) { - GET_MALLOC_STACK_TRACE; - if (flags()->poison_in_malloc) { - stack.tag = STACK_TRACE_TAG_POISON; - PoisonMemory(data, size, &stack); - } -} - -INTERCEPTOR(void *, mmap, void *addr, SIZE_T length, int prot, int flags, - int fd, OFF_T offset) { - if (msan_init_is_running) - return REAL(mmap)(addr, length, prot, flags, fd, offset); - ENSURE_MSAN_INITED(); - if (addr && !MEM_IS_APP(addr)) { - if (flags & map_fixed) { - *__errno_location() = errno_EINVAL; - return (void *)-1; - } else { - addr = 0; - } - } - void *res = REAL(mmap)(addr, length, prot, flags, fd, offset); - if (res != (void*)-1) - __msan_unpoison(res, RoundUpTo(length, GetPageSize())); - return res; -} - -#if !SANITIZER_FREEBSD -INTERCEPTOR(void *, mmap64, void *addr, SIZE_T length, int prot, int flags, - int fd, OFF64_T offset) { - ENSURE_MSAN_INITED(); - if (addr && !MEM_IS_APP(addr)) { - if (flags & map_fixed) { - *__errno_location() = errno_EINVAL; - return (void *)-1; - } else { - addr = 0; - } - } - void *res = REAL(mmap64)(addr, length, prot, flags, fd, offset); - if (res != (void*)-1) - __msan_unpoison(res, RoundUpTo(length, GetPageSize())); - return res; -} -#define MSAN_MAYBE_INTERCEPT_MMAP64 INTERCEPT_FUNCTION(mmap64) -#else -#define MSAN_MAYBE_INTERCEPT_MMAP64 -#endif - -struct dlinfo { - char *dli_fname; - void *dli_fbase; - char *dli_sname; - void *dli_saddr; -}; - -INTERCEPTOR(int, dladdr, void *addr, dlinfo *info) { - ENSURE_MSAN_INITED(); - int res = REAL(dladdr)(addr, info); - if (res != 0) { - __msan_unpoison(info, sizeof(*info)); - if (info->dli_fname) - __msan_unpoison(info->dli_fname, REAL(strlen)(info->dli_fname) + 1); - if (info->dli_sname) - __msan_unpoison(info->dli_sname, REAL(strlen)(info->dli_sname) + 1); - } - return res; -} - -INTERCEPTOR(char *, dlerror, int fake) { - ENSURE_MSAN_INITED(); - char *res = REAL(dlerror)(fake); - if (res != 0) __msan_unpoison(res, REAL(strlen)(res) + 1); - return res; -} - -typedef int (*dl_iterate_phdr_cb)(__sanitizer_dl_phdr_info *info, SIZE_T size, - void *data); -struct dl_iterate_phdr_data { - dl_iterate_phdr_cb callback; - void *data; -}; - -static int msan_dl_iterate_phdr_cb(__sanitizer_dl_phdr_info *info, SIZE_T size, - void *data) { - if (info) { - __msan_unpoison(info, size); - if (info->dlpi_name) - __msan_unpoison(info->dlpi_name, REAL(strlen)(info->dlpi_name) + 1); - } - dl_iterate_phdr_data *cbdata = (dl_iterate_phdr_data *)data; - UnpoisonParam(3); - return cbdata->callback(info, size, cbdata->data); -} - -INTERCEPTOR(int, dl_iterate_phdr, dl_iterate_phdr_cb callback, void *data) { - ENSURE_MSAN_INITED(); - dl_iterate_phdr_data cbdata; - cbdata.callback = callback; - cbdata.data = data; - int res = REAL(dl_iterate_phdr)(msan_dl_iterate_phdr_cb, (void *)&cbdata); - return res; -} - -INTERCEPTOR(int, getrusage, int who, void *usage) { - ENSURE_MSAN_INITED(); - int res = REAL(getrusage)(who, usage); - if (res == 0) { - __msan_unpoison(usage, __sanitizer::struct_rusage_sz); - } - return res; -} - -class SignalHandlerScope { - public: - SignalHandlerScope() { - if (MsanThread *t = GetCurrentThread()) - t->EnterSignalHandler(); - } - ~SignalHandlerScope() { - if (MsanThread *t = GetCurrentThread()) - t->LeaveSignalHandler(); - } -}; - -// 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 = 1024; -static atomic_uintptr_t sigactions[kMaxSignals]; -static StaticSpinMutex sigactions_mu; - -static void SignalHandler(int signo) { - SignalHandlerScope signal_handler_scope; - ScopedThreadLocalStateBackup stlsb; - UnpoisonParam(1); - - typedef void (*signal_cb)(int x); - signal_cb cb = - (signal_cb)atomic_load(&sigactions[signo], memory_order_relaxed); - cb(signo); -} - -static void SignalAction(int signo, void *si, void *uc) { - SignalHandlerScope signal_handler_scope; - ScopedThreadLocalStateBackup stlsb; - UnpoisonParam(3); - __msan_unpoison(si, sizeof(__sanitizer_sigaction)); - __msan_unpoison(uc, __sanitizer::ucontext_t_sz); - - typedef void (*sigaction_cb)(int, void *, void *); - sigaction_cb cb = - (sigaction_cb)atomic_load(&sigactions[signo], memory_order_relaxed); - cb(signo, si, uc); -} - -INTERCEPTOR(int, sigaction, int signo, const __sanitizer_sigaction *act, - __sanitizer_sigaction *oldact) { - ENSURE_MSAN_INITED(); - // FIXME: check that *act is unpoisoned. - // That requires intercepting all of sigemptyset, sigfillset, etc. - int res; - if (flags()->wrap_signals) { - SpinMutexLock lock(&sigactions_mu); - CHECK_LT(signo, kMaxSignals); - uptr old_cb = atomic_load(&sigactions[signo], memory_order_relaxed); - __sanitizer_sigaction new_act; - __sanitizer_sigaction *pnew_act = act ? &new_act : 0; - if (act) { - REAL(memcpy)(pnew_act, act, sizeof(__sanitizer_sigaction)); - uptr cb = (uptr)pnew_act->sigaction; - uptr new_cb = (pnew_act->sa_flags & __sanitizer::sa_siginfo) - ? (uptr)SignalAction - : (uptr)SignalHandler; - if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) { - atomic_store(&sigactions[signo], cb, memory_order_relaxed); - pnew_act->sigaction = (void (*)(int, void *, void *))new_cb; - } - } - res = REAL(sigaction)(signo, pnew_act, oldact); - if (res == 0 && oldact) { - uptr cb = (uptr)oldact->sigaction; - if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) { - oldact->sigaction = (void (*)(int, void *, void *))old_cb; - } - } - } else { - res = REAL(sigaction)(signo, act, oldact); - } - - if (res == 0 && oldact) { - __msan_unpoison(oldact, sizeof(__sanitizer_sigaction)); - } - return res; -} - -INTERCEPTOR(int, signal, int signo, uptr cb) { - ENSURE_MSAN_INITED(); - if (flags()->wrap_signals) { - CHECK_LT(signo, kMaxSignals); - SpinMutexLock lock(&sigactions_mu); - if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) { - atomic_store(&sigactions[signo], cb, memory_order_relaxed); - cb = (uptr) SignalHandler; - } - return REAL(signal)(signo, cb); - } else { - return REAL(signal)(signo, cb); - } -} - -extern "C" int pthread_attr_init(void *attr); -extern "C" int pthread_attr_destroy(void *attr); - -static void *MsanThreadStartFunc(void *arg) { - MsanThread *t = (MsanThread *)arg; - SetCurrentThread(t); - return t->ThreadStart(); -} - -INTERCEPTOR(int, pthread_create, void *th, void *attr, void *(*callback)(void*), - void * param) { - ENSURE_MSAN_INITED(); // for GetTlsSize() - __sanitizer_pthread_attr_t myattr; - if (attr == 0) { - pthread_attr_init(&myattr); - attr = &myattr; - } - - AdjustStackSize(attr); - - MsanThread *t = MsanThread::Create(callback, param); - - int res = REAL(pthread_create)(th, attr, MsanThreadStartFunc, t); - - if (attr == &myattr) - pthread_attr_destroy(&myattr); - if (!res) { - __msan_unpoison(th, __sanitizer::pthread_t_sz); - } - return res; -} - -INTERCEPTOR(int, pthread_key_create, __sanitizer_pthread_key_t *key, - void (*dtor)(void *value)) { - if (msan_init_is_running) return REAL(pthread_key_create)(key, dtor); - ENSURE_MSAN_INITED(); - int res = REAL(pthread_key_create)(key, dtor); - if (!res && key) - __msan_unpoison(key, sizeof(*key)); - return res; -} - -INTERCEPTOR(int, pthread_join, void *th, void **retval) { - ENSURE_MSAN_INITED(); - int res = REAL(pthread_join)(th, retval); - if (!res && retval) - __msan_unpoison(retval, sizeof(*retval)); - return res; -} - -extern char *tzname[2]; - -INTERCEPTOR(void, tzset, int fake) { - ENSURE_MSAN_INITED(); - REAL(tzset)(fake); - if (tzname[0]) - __msan_unpoison(tzname[0], REAL(strlen)(tzname[0]) + 1); - if (tzname[1]) - __msan_unpoison(tzname[1], REAL(strlen)(tzname[1]) + 1); - return; -} - -struct MSanAtExitRecord { - void (*func)(void *arg); - void *arg; -}; - -void MSanAtExitWrapper(void *arg) { - UnpoisonParam(1); - MSanAtExitRecord *r = (MSanAtExitRecord *)arg; - r->func(r->arg); - InternalFree(r); -} - -// Unpoison argument shadow for C++ module destructors. -INTERCEPTOR(int, __cxa_atexit, void (*func)(void *), void *arg, - void *dso_handle) { - if (msan_init_is_running) return REAL(__cxa_atexit)(func, arg, dso_handle); - ENSURE_MSAN_INITED(); - MSanAtExitRecord *r = - (MSanAtExitRecord *)InternalAlloc(sizeof(MSanAtExitRecord)); - r->func = func; - r->arg = arg; - return REAL(__cxa_atexit)(MSanAtExitWrapper, r, dso_handle); -} - -DECLARE_REAL(int, shmctl, int shmid, int cmd, void *buf) - -INTERCEPTOR(void *, shmat, int shmid, const void *shmaddr, int shmflg) { - ENSURE_MSAN_INITED(); - void *p = REAL(shmat)(shmid, shmaddr, shmflg); - if (p != (void *)-1) { - __sanitizer_shmid_ds ds; - int res = REAL(shmctl)(shmid, shmctl_ipc_stat, &ds); - if (!res) { - __msan_unpoison(p, ds.shm_segsz); - } - } - return p; -} - -static void BeforeFork() { - StackDepotLockAll(); - ChainedOriginDepotLockAll(); -} - -static void AfterFork() { - ChainedOriginDepotUnlockAll(); - StackDepotUnlockAll(); -} - -INTERCEPTOR(int, fork, void) { - ENSURE_MSAN_INITED(); - BeforeFork(); - int pid = REAL(fork)(); - AfterFork(); - return pid; -} - -struct MSanInterceptorContext { - bool in_interceptor_scope; -}; - -namespace __msan { - -int OnExit() { - // FIXME: ask frontend whether we need to return failure. - return 0; -} - -} // namespace __msan - -// A version of CHECK_UNPOISONED using a saved scope value. Used in common -// interceptors. -#define CHECK_UNPOISONED_CTX(ctx, x, n) \ - do { \ - if (!((MSanInterceptorContext *)ctx)->in_interceptor_scope) \ - CHECK_UNPOISONED_0(x, n); \ - } while (0) - -#define MSAN_INTERCEPT_FUNC(name) \ - do { \ - if ((!INTERCEPT_FUNCTION(name) || !REAL(name))) \ - VReport(1, "MemorySanitizer: failed to intercept '" #name "'\n"); \ - } while (0) - -#define COMMON_INTERCEPT_FUNCTION(name) MSAN_INTERCEPT_FUNC(name) -#define COMMON_INTERCEPTOR_UNPOISON_PARAM(count) \ - UnpoisonParam(count) -#define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \ - __msan_unpoison(ptr, size) -#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) \ - CHECK_UNPOISONED_CTX(ctx, ptr, size) -#define COMMON_INTERCEPTOR_INITIALIZE_RANGE(ptr, size) \ - __msan_unpoison(ptr, size) -#define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \ - if (msan_init_is_running) return REAL(func)(__VA_ARGS__); \ - MSanInterceptorContext msan_ctx = {IsInInterceptorScope()}; \ - ctx = (void *)&msan_ctx; \ - (void)ctx; \ - InterceptorScope interceptor_scope; \ - __msan_unpoison(__errno_location(), sizeof(int)); /* NOLINT */ \ - ENSURE_MSAN_INITED(); -#define COMMON_INTERCEPTOR_DIR_ACQUIRE(ctx, path) \ - do { \ - } while (false) -#define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) \ - do { \ - } while (false) -#define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd) \ - do { \ - } while (false) -#define COMMON_INTERCEPTOR_FD_SOCKET_ACCEPT(ctx, fd, newfd) \ - do { \ - } while (false) -#define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name) \ - do { \ - } while (false) // FIXME -#define COMMON_INTERCEPTOR_SET_PTHREAD_NAME(ctx, thread, name) \ - do { \ - } while (false) // FIXME -#define COMMON_INTERCEPTOR_BLOCK_REAL(name) REAL(name) -#define COMMON_INTERCEPTOR_ON_EXIT(ctx) OnExit() -#define COMMON_INTERCEPTOR_LIBRARY_LOADED(filename, handle) \ - do { \ - link_map *map = GET_LINK_MAP_BY_DLOPEN_HANDLE((handle)); \ - if (map) ForEachMappedRegion(map, __msan_unpoison); \ - } while (false) - -#include "sanitizer_common/sanitizer_common_interceptors.inc" - -#define COMMON_SYSCALL_PRE_READ_RANGE(p, s) CHECK_UNPOISONED(p, s) -#define COMMON_SYSCALL_PRE_WRITE_RANGE(p, s) \ - do { \ - } while (false) -#define COMMON_SYSCALL_POST_READ_RANGE(p, s) \ - do { \ - } while (false) -#define COMMON_SYSCALL_POST_WRITE_RANGE(p, s) __msan_unpoison(p, s) -#include "sanitizer_common/sanitizer_common_syscalls.inc" - -// These interface functions reside here so that they can use -// REAL(memset), etc. -void __msan_unpoison(const void *a, uptr size) { - if (!MEM_IS_APP(a)) return; - SetShadow(a, size, 0); -} - -void __msan_poison(const void *a, uptr size) { - if (!MEM_IS_APP(a)) return; - SetShadow(a, size, __msan::flags()->poison_heap_with_zeroes ? 0 : -1); -} - -void __msan_poison_stack(void *a, uptr size) { - if (!MEM_IS_APP(a)) return; - SetShadow(a, size, __msan::flags()->poison_stack_with_zeroes ? 0 : -1); -} - -void __msan_clear_and_unpoison(void *a, uptr size) { - REAL(memset)(a, 0, size); - SetShadow(a, size, 0); -} - -void *__msan_memcpy(void *dest, const void *src, SIZE_T n) { - if (!msan_inited) return internal_memcpy(dest, src, n); - if (msan_init_is_running) return REAL(memcpy)(dest, src, n); - ENSURE_MSAN_INITED(); - GET_STORE_STACK_TRACE; - void *res = REAL(memcpy)(dest, src, n); - CopyShadowAndOrigin(dest, src, n, &stack); - return res; -} - -void *__msan_memset(void *s, int c, SIZE_T n) { - if (!msan_inited) return internal_memset(s, c, n); - if (msan_init_is_running) return REAL(memset)(s, c, n); - ENSURE_MSAN_INITED(); - void *res = REAL(memset)(s, c, n); - __msan_unpoison(s, n); - return res; -} - -void *__msan_memmove(void *dest, const void *src, SIZE_T n) { - if (!msan_inited) return internal_memmove(dest, src, n); - if (msan_init_is_running) return REAL(memmove)(dest, src, n); - ENSURE_MSAN_INITED(); - GET_STORE_STACK_TRACE; - void *res = REAL(memmove)(dest, src, n); - MoveShadowAndOrigin(dest, src, n, &stack); - return res; -} - -void __msan_unpoison_string(const char* s) { - if (!MEM_IS_APP(s)) return; - __msan_unpoison(s, REAL(strlen)(s) + 1); -} - -namespace __msan { - -void InitializeInterceptors() { - static int inited = 0; - CHECK_EQ(inited, 0); - InitializeCommonInterceptors(); - - INTERCEPT_FUNCTION(mmap); - MSAN_MAYBE_INTERCEPT_MMAP64; - INTERCEPT_FUNCTION(posix_memalign); - MSAN_MAYBE_INTERCEPT_MEMALIGN; - INTERCEPT_FUNCTION(__libc_memalign); - INTERCEPT_FUNCTION(valloc); - MSAN_MAYBE_INTERCEPT_PVALLOC; - INTERCEPT_FUNCTION(malloc); - INTERCEPT_FUNCTION(calloc); - INTERCEPT_FUNCTION(realloc); - INTERCEPT_FUNCTION(free); - MSAN_MAYBE_INTERCEPT_CFREE; - INTERCEPT_FUNCTION(malloc_usable_size); - MSAN_MAYBE_INTERCEPT_MALLINFO; - MSAN_MAYBE_INTERCEPT_MALLOPT; - MSAN_MAYBE_INTERCEPT_MALLOC_STATS; - INTERCEPT_FUNCTION(fread); - MSAN_MAYBE_INTERCEPT_FREAD_UNLOCKED; - INTERCEPT_FUNCTION(readlink); - INTERCEPT_FUNCTION(memcpy); - INTERCEPT_FUNCTION(memccpy); - INTERCEPT_FUNCTION(mempcpy); - INTERCEPT_FUNCTION(memset); - INTERCEPT_FUNCTION(memmove); - INTERCEPT_FUNCTION(bcopy); - INTERCEPT_FUNCTION(wmemset); - INTERCEPT_FUNCTION(wmemcpy); - INTERCEPT_FUNCTION(wmempcpy); - INTERCEPT_FUNCTION(wmemmove); - INTERCEPT_FUNCTION(strcpy); // NOLINT - INTERCEPT_FUNCTION(stpcpy); // NOLINT - INTERCEPT_FUNCTION(strdup); - MSAN_MAYBE_INTERCEPT___STRDUP; - INTERCEPT_FUNCTION(strndup); - MSAN_MAYBE_INTERCEPT___STRNDUP; - INTERCEPT_FUNCTION(strncpy); // NOLINT - INTERCEPT_FUNCTION(strlen); - INTERCEPT_FUNCTION(strnlen); - INTERCEPT_FUNCTION(gcvt); - INTERCEPT_FUNCTION(strcat); // NOLINT - INTERCEPT_FUNCTION(strncat); // NOLINT - INTERCEPT_STRTO(strtod); - INTERCEPT_STRTO(strtof); - INTERCEPT_STRTO(strtold); - INTERCEPT_STRTO(strtol); - INTERCEPT_STRTO(strtoul); - INTERCEPT_STRTO(strtoll); - INTERCEPT_STRTO(strtoull); - INTERCEPT_STRTO(wcstod); - INTERCEPT_STRTO(wcstof); - INTERCEPT_STRTO(wcstold); - INTERCEPT_STRTO(wcstol); - INTERCEPT_STRTO(wcstoul); - INTERCEPT_STRTO(wcstoll); - INTERCEPT_STRTO(wcstoull); - INTERCEPT_FUNCTION(vswprintf); - INTERCEPT_FUNCTION(swprintf); - INTERCEPT_FUNCTION(strxfrm); - INTERCEPT_FUNCTION(strxfrm_l); - INTERCEPT_FUNCTION(strftime); - INTERCEPT_FUNCTION(strftime_l); - MSAN_MAYBE_INTERCEPT___STRFTIME_L; - INTERCEPT_FUNCTION(wcsftime); - INTERCEPT_FUNCTION(wcsftime_l); - MSAN_MAYBE_INTERCEPT___WCSFTIME_L; - INTERCEPT_FUNCTION(mbtowc); - INTERCEPT_FUNCTION(mbrtowc); - INTERCEPT_FUNCTION(wcslen); - INTERCEPT_FUNCTION(wcschr); - INTERCEPT_FUNCTION(wcscpy); - INTERCEPT_FUNCTION(wcscmp); - INTERCEPT_FUNCTION(getenv); - INTERCEPT_FUNCTION(setenv); - INTERCEPT_FUNCTION(putenv); - INTERCEPT_FUNCTION(gettimeofday); - INTERCEPT_FUNCTION(fcvt); - MSAN_MAYBE_INTERCEPT___FXSTAT; - MSAN_INTERCEPT_FSTATAT; - MSAN_INTERCEPT_STAT; - MSAN_MAYBE_INTERCEPT___LXSTAT; - MSAN_MAYBE_INTERCEPT___FXSTAT64; - MSAN_MAYBE_INTERCEPT___FXSTATAT64; - MSAN_MAYBE_INTERCEPT___XSTAT64; - MSAN_MAYBE_INTERCEPT___LXSTAT64; - INTERCEPT_FUNCTION(pipe); - INTERCEPT_FUNCTION(pipe2); - INTERCEPT_FUNCTION(socketpair); - INTERCEPT_FUNCTION(fgets); - MSAN_MAYBE_INTERCEPT_FGETS_UNLOCKED; - INTERCEPT_FUNCTION(getrlimit); - MSAN_MAYBE_INTERCEPT_GETRLIMIT64; - MSAN_INTERCEPT_UNAME; - INTERCEPT_FUNCTION(gethostname); - MSAN_MAYBE_INTERCEPT_EPOLL_WAIT; - MSAN_MAYBE_INTERCEPT_EPOLL_PWAIT; - INTERCEPT_FUNCTION(recv); - INTERCEPT_FUNCTION(recvfrom); - INTERCEPT_FUNCTION(dladdr); - INTERCEPT_FUNCTION(dlerror); - INTERCEPT_FUNCTION(dl_iterate_phdr); - INTERCEPT_FUNCTION(getrusage); - INTERCEPT_FUNCTION(sigaction); - INTERCEPT_FUNCTION(signal); - INTERCEPT_FUNCTION(pthread_create); - INTERCEPT_FUNCTION(pthread_key_create); - INTERCEPT_FUNCTION(pthread_join); - INTERCEPT_FUNCTION(tzset); - INTERCEPT_FUNCTION(__cxa_atexit); - INTERCEPT_FUNCTION(shmat); - INTERCEPT_FUNCTION(fork); - - inited = 1; -} -} // namespace __msan |