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-rw-r--r--contrib/compiler-rt/lib/msan/msan_interceptors.cc1575
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