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-rw-r--r--lib/msan/msan_interceptors.cpp1724
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diff --git a/lib/msan/msan_interceptors.cpp b/lib/msan/msan_interceptors.cpp
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+++ b/lib/msan/msan_interceptors.cpp
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+//===-- msan_interceptors.cpp ---------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of MemorySanitizer.
+//
+// Interceptors for standard library functions.
+//
+// FIXME: move as many interceptors as possible into
+// sanitizer_common/sanitizer_common_interceptors.h
+//===----------------------------------------------------------------------===//
+
+#include "interception/interception.h"
+#include "msan.h"
+#include "msan_chained_origin_depot.h"
+#include "msan_origin.h"
+#include "msan_report.h"
+#include "msan_thread.h"
+#include "msan_poisoning.h"
+#include "sanitizer_common/sanitizer_platform_limits_posix.h"
+#include "sanitizer_common/sanitizer_platform_limits_netbsd.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_errno.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 "sanitizer_common/sanitizer_vector.h"
+
+#if SANITIZER_NETBSD
+#define fstat __fstat50
+#define gettimeofday __gettimeofday50
+#define getrusage __getrusage50
+#define tzset __tzset50
+#endif
+
+#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;
+
+DECLARE_REAL(SIZE_T, strlen, const char *s)
+DECLARE_REAL(SIZE_T, strnlen, const char *s, SIZE_T maxlen)
+DECLARE_REAL(void *, memcpy, void *dest, const void *src, uptr n)
+DECLARE_REAL(void *, memset, void *dest, int c, uptr n)
+
+// True if this is a nested interceptor.
+static THREADLOCAL int in_interceptor_scope;
+
+void __msan_scoped_disable_interceptor_checks() { ++in_interceptor_scope; }
+void __msan_scoped_enable_interceptor_checks() { --in_interceptor_scope; }
+
+struct InterceptorScope {
+ InterceptorScope() { ++in_interceptor_scope; }
+ ~InterceptorScope() { --in_interceptor_scope; }
+};
+
+bool IsInInterceptorScope() {
+ return in_interceptor_scope;
+}
+
+static uptr allocated_for_dlsym;
+static const uptr kDlsymAllocPoolSize = 1024;
+static uptr alloc_memory_for_dlsym[kDlsymAllocPoolSize];
+
+static bool IsInDlsymAllocPool(const void *ptr) {
+ uptr off = (uptr)ptr - (uptr)alloc_memory_for_dlsym;
+ return off < sizeof(alloc_memory_for_dlsym);
+}
+
+static void *AllocateFromLocalPool(uptr size_in_bytes) {
+ uptr size_in_words = RoundUpTo(size_in_bytes, kWordSize) / kWordSize;
+ void *mem = (void *)&alloc_memory_for_dlsym[allocated_for_dlsym];
+ allocated_for_dlsym += size_in_words;
+ CHECK_LT(allocated_for_dlsym, kDlsymAllocPoolSize);
+ return mem;
+}
+
+#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)
+
+#define CHECK_UNPOISONED_STRING_OF_LEN(x, len, n) \
+ CHECK_UNPOISONED((x), \
+ common_flags()->strict_string_checks ? (len) + 1 : (n) )
+
+#define CHECK_UNPOISONED_STRING(x, n) \
+ CHECK_UNPOISONED_STRING_OF_LEN((x), internal_strlen(x), (n))
+
+#if !SANITIZER_FREEBSD && !SANITIZER_NETBSD
+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
+
+#if !SANITIZER_NETBSD
+INTERCEPTOR(void *, mempcpy, void *dest, const void *src, SIZE_T n) {
+ return (char *)__msan_memcpy(dest, src, n) + n;
+}
+#define MSAN_MAYBE_INTERCEPT_MEMPCPY INTERCEPT_FUNCTION(mempcpy)
+#else
+#define MSAN_MAYBE_INTERCEPT_MEMPCPY
+#endif
+
+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 *, 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_NE(memptr, 0);
+ int res = msan_posix_memalign(memptr, alignment, size, &stack);
+ if (!res)
+ __msan_unpoison(memptr, sizeof(*memptr));
+ return res;
+}
+
+#if !SANITIZER_FREEBSD && !SANITIZER_NETBSD
+INTERCEPTOR(void *, memalign, SIZE_T alignment, SIZE_T size) {
+ GET_MALLOC_STACK_TRACE;
+ return msan_memalign(alignment, size, &stack);
+}
+#define MSAN_MAYBE_INTERCEPT_MEMALIGN INTERCEPT_FUNCTION(memalign)
+#else
+#define MSAN_MAYBE_INTERCEPT_MEMALIGN
+#endif
+
+INTERCEPTOR(void *, aligned_alloc, SIZE_T alignment, SIZE_T size) {
+ GET_MALLOC_STACK_TRACE;
+ return msan_aligned_alloc(alignment, size, &stack);
+}
+
+#if !SANITIZER_NETBSD
+INTERCEPTOR(void *, __libc_memalign, SIZE_T alignment, SIZE_T size) {
+ GET_MALLOC_STACK_TRACE;
+ void *ptr = msan_memalign(alignment, size, &stack);
+ if (ptr)
+ DTLS_on_libc_memalign(ptr, size);
+ return ptr;
+}
+#define MSAN_MAYBE_INTERCEPT___LIBC_MEMALIGN INTERCEPT_FUNCTION(__libc_memalign)
+#else
+#define MSAN_MAYBE_INTERCEPT___LIBC_MEMALIGN
+#endif
+
+INTERCEPTOR(void *, valloc, SIZE_T size) {
+ GET_MALLOC_STACK_TRACE;
+ return msan_valloc(size, &stack);
+}
+
+#if !SANITIZER_FREEBSD && !SANITIZER_NETBSD
+INTERCEPTOR(void *, pvalloc, SIZE_T size) {
+ GET_MALLOC_STACK_TRACE;
+ return msan_pvalloc(size, &stack);
+}
+#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 || UNLIKELY(IsInDlsymAllocPool(ptr))) return;
+ MsanDeallocate(&stack, ptr);
+}
+
+#if !SANITIZER_FREEBSD && !SANITIZER_NETBSD
+INTERCEPTOR(void, cfree, void *ptr) {
+ GET_MALLOC_STACK_TRACE;
+ if (!ptr || UNLIKELY(IsInDlsymAllocPool(ptr))) return;
+ MsanDeallocate(&stack, ptr);
+}
+#define MSAN_MAYBE_INTERCEPT_CFREE INTERCEPT_FUNCTION(cfree)
+#else
+#define MSAN_MAYBE_INTERCEPT_CFREE
+#endif
+
+#if !SANITIZER_NETBSD
+INTERCEPTOR(uptr, malloc_usable_size, void *ptr) {
+ return __sanitizer_get_allocated_size(ptr);
+}
+#define MSAN_MAYBE_INTERCEPT_MALLOC_USABLE_SIZE \
+ INTERCEPT_FUNCTION(malloc_usable_size)
+#else
+#define MSAN_MAYBE_INTERCEPT_MALLOC_USABLE_SIZE
+#endif
+
+#if !SANITIZER_FREEBSD && !SANITIZER_NETBSD
+// This function actually returns a struct by value, but we can't unpoison a
+// temporary! The following is equivalent on all supported platforms but
+// aarch64 (which uses a different register for sret value). We have a test
+// to confirm that.
+INTERCEPTOR(void, mallinfo, __sanitizer_struct_mallinfo *sret) {
+#ifdef __aarch64__
+ uptr r8;
+ asm volatile("mov %0,x8" : "=r" (r8));
+ sret = reinterpret_cast<__sanitizer_struct_mallinfo*>(r8);
+#endif
+ 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 && !SANITIZER_NETBSD
+INTERCEPTOR(int, mallopt, int cmd, int value) {
+ return 0;
+}
+#define MSAN_MAYBE_INTERCEPT_MALLOPT INTERCEPT_FUNCTION(mallopt)
+#else
+#define MSAN_MAYBE_INTERCEPT_MALLOPT
+#endif
+
+#if !SANITIZER_FREEBSD && !SANITIZER_NETBSD
+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(char *, strcpy, char *dest, const char *src) {
+ ENSURE_MSAN_INITED();
+ GET_STORE_STACK_TRACE;
+ SIZE_T n = REAL(strlen)(src);
+ CHECK_UNPOISONED_STRING(src + n, 0);
+ char *res = REAL(strcpy)(dest, src);
+ CopyShadowAndOrigin(dest, src, n + 1, &stack);
+ return res;
+}
+
+INTERCEPTOR(char *, strncpy, char *dest, const char *src, SIZE_T n) {
+ 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);
+ CopyShadowAndOrigin(dest, src, copy_size, &stack);
+ __msan_unpoison(dest + copy_size, n - copy_size);
+ return res;
+}
+
+#if !SANITIZER_NETBSD
+INTERCEPTOR(char *, stpcpy, char *dest, const char *src) {
+ ENSURE_MSAN_INITED();
+ GET_STORE_STACK_TRACE;
+ SIZE_T n = REAL(strlen)(src);
+ CHECK_UNPOISONED_STRING(src + n, 0);
+ char *res = REAL(stpcpy)(dest, src);
+ CopyShadowAndOrigin(dest, src, n + 1, &stack);
+ return res;
+}
+#define MSAN_MAYBE_INTERCEPT_STPCPY INTERCEPT_FUNCTION(stpcpy)
+#else
+#define MSAN_MAYBE_INTERCEPT_STPCPY
+#endif
+
+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);
+ CHECK_UNPOISONED_STRING(src + n, 0);
+ char *res = REAL(strdup)(src);
+ CopyShadowAndOrigin(res, src, n + 1, &stack);
+ return res;
+}
+
+#if !SANITIZER_FREEBSD && !SANITIZER_NETBSD
+INTERCEPTOR(char *, __strdup, char *src) {
+ ENSURE_MSAN_INITED();
+ GET_STORE_STACK_TRACE;
+ SIZE_T n = REAL(strlen)(src);
+ CHECK_UNPOISONED_STRING(src + n, 0);
+ 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
+
+#if !SANITIZER_NETBSD
+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;
+}
+#define MSAN_MAYBE_INTERCEPT_GCVT INTERCEPT_FUNCTION(gcvt)
+#else
+#define MSAN_MAYBE_INTERCEPT_GCVT
+#endif
+
+INTERCEPTOR(char *, strcat, char *dest, const char *src) {
+ ENSURE_MSAN_INITED();
+ GET_STORE_STACK_TRACE;
+ SIZE_T src_size = REAL(strlen)(src);
+ SIZE_T dest_size = REAL(strlen)(dest);
+ CHECK_UNPOISONED_STRING(src + src_size, 0);
+ CHECK_UNPOISONED_STRING(dest + dest_size, 0);
+ char *res = REAL(strcat)(dest, src);
+ CopyShadowAndOrigin(dest + dest_size, src, src_size + 1, &stack);
+ return res;
+}
+
+INTERCEPTOR(char *, strncat, char *dest, const char *src, SIZE_T n) {
+ ENSURE_MSAN_INITED();
+ GET_STORE_STACK_TRACE;
+ SIZE_T dest_size = REAL(strlen)(dest);
+ SIZE_T copy_size = REAL(strnlen)(src, n);
+ CHECK_UNPOISONED_STRING(dest + dest_size, 0);
+ char *res = REAL(strncat)(dest, src, n);
+ 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); \
+ }
+
+#if SANITIZER_NETBSD
+#define INTERCEPTORS_STRTO(ret_type, func, char_type) \
+ INTERCEPTOR_STRTO(ret_type, func, char_type) \
+ INTERCEPTOR_STRTO_LOC(ret_type, func##_l, 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)
+
+#else
+#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)
+#endif
+
+INTERCEPTORS_STRTO(double, strtod, char)
+INTERCEPTORS_STRTO(float, strtof, char)
+INTERCEPTORS_STRTO(long double, strtold, char)
+INTERCEPTORS_STRTO_BASE(long, strtol, char)
+INTERCEPTORS_STRTO_BASE(long long, strtoll, char)
+INTERCEPTORS_STRTO_BASE(unsigned long, strtoul, char)
+INTERCEPTORS_STRTO_BASE(unsigned long long, strtoull, char)
+INTERCEPTORS_STRTO_BASE(u64, strtouq, char)
+
+INTERCEPTORS_STRTO(double, wcstod, wchar_t)
+INTERCEPTORS_STRTO(float, wcstof, wchar_t)
+INTERCEPTORS_STRTO(long double, wcstold, wchar_t)
+INTERCEPTORS_STRTO_BASE(long, wcstol, wchar_t)
+INTERCEPTORS_STRTO_BASE(long long, wcstoll, wchar_t)
+INTERCEPTORS_STRTO_BASE(unsigned long, wcstoul, wchar_t)
+INTERCEPTORS_STRTO_BASE(unsigned long long, wcstoull, wchar_t)
+
+#if SANITIZER_NETBSD
+#define INTERCEPT_STRTO(func) \
+ INTERCEPT_FUNCTION(func); \
+ INTERCEPT_FUNCTION(func##_l);
+#else
+#define INTERCEPT_STRTO(func) \
+ INTERCEPT_FUNCTION(func); \
+ INTERCEPT_FUNCTION(func##_l); \
+ INTERCEPT_FUNCTION(__##func##_l); \
+ INTERCEPT_FUNCTION(__##func##_internal);
+#endif
+
+
+// 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;
+}
+
+#define INTERCEPTOR_STRFTIME_BODY(char_type, ret_type, func, s, ...) \
+ ENSURE_MSAN_INITED(); \
+ InterceptorScope interceptor_scope; \
+ 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 && !SANITIZER_NETBSD
+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 && !SANITIZER_NETBSD
+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(SIZE_T, 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;
+}
+
+// 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;
+}
+
+#if !SANITIZER_NETBSD
+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;
+}
+#define MSAN_MAYBE_INTERCEPT_WMEMPCPY INTERCEPT_FUNCTION(wmempcpy)
+#else
+#define MSAN_MAYBE_INTERCEPT_WMEMPCPY
+#endif
+
+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;
+}
+
+#if !SANITIZER_NETBSD
+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;
+}
+#define MSAN_MAYBE_INTERCEPT_FCVT INTERCEPT_FUNCTION(fcvt)
+#else
+#define MSAN_MAYBE_INTERCEPT_FCVT
+#endif
+
+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();
+ CHECK_UNPOISONED_STRING(name, 0);
+ 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 || SANITIZER_NETBSD
+INTERCEPTOR(int, fstat, int fd, void *buf) {
+ ENSURE_MSAN_INITED();
+ int res = REAL(fstat)(fd, buf);
+ if (!res)
+ __msan_unpoison(buf, __sanitizer::struct_stat_sz);
+ return res;
+}
+#define MSAN_MAYBE_INTERCEPT_FSTAT INTERCEPT_FUNCTION(fstat)
+#else
+#define MSAN_MAYBE_INTERCEPT_FSTAT
+#endif
+
+#if !SANITIZER_FREEBSD && !SANITIZER_NETBSD
+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 && !SANITIZER_NETBSD
+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 || SANITIZER_NETBSD
+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 && !SANITIZER_NETBSD
+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
+
+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;
+}
+
+#if !SANITIZER_FREEBSD && !SANITIZER_NETBSD
+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
+
+#define INTERCEPTOR_GETRLIMIT_BODY(func, resource, rlim) \
+ if (msan_init_is_running) \
+ return REAL(getrlimit)(resource, rlim); \
+ ENSURE_MSAN_INITED(); \
+ int res = REAL(func)(resource, rlim); \
+ if (!res) \
+ __msan_unpoison(rlim, __sanitizer::struct_rlimit_sz); \
+ return res
+
+INTERCEPTOR(int, getrlimit, int resource, void *rlim) {
+ INTERCEPTOR_GETRLIMIT_BODY(getrlimit, resource, rlim);
+}
+
+#if !SANITIZER_FREEBSD && !SANITIZER_NETBSD
+INTERCEPTOR(int, __getrlimit, int resource, void *rlim) {
+ INTERCEPTOR_GETRLIMIT_BODY(__getrlimit, resource, rlim);
+}
+
+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;
+}
+
+INTERCEPTOR(int, prlimit, int pid, int resource, void *new_rlimit,
+ void *old_rlimit) {
+ if (msan_init_is_running)
+ return REAL(prlimit)(pid, resource, new_rlimit, old_rlimit);
+ ENSURE_MSAN_INITED();
+ CHECK_UNPOISONED(new_rlimit, __sanitizer::struct_rlimit_sz);
+ int res = REAL(prlimit)(pid, resource, new_rlimit, old_rlimit);
+ if (!res) __msan_unpoison(old_rlimit, __sanitizer::struct_rlimit_sz);
+ return res;
+}
+
+INTERCEPTOR(int, prlimit64, int pid, int resource, void *new_rlimit,
+ void *old_rlimit) {
+ if (msan_init_is_running)
+ return REAL(prlimit64)(pid, resource, new_rlimit, old_rlimit);
+ ENSURE_MSAN_INITED();
+ CHECK_UNPOISONED(new_rlimit, __sanitizer::struct_rlimit64_sz);
+ int res = REAL(prlimit64)(pid, resource, new_rlimit, old_rlimit);
+ if (!res) __msan_unpoison(old_rlimit, __sanitizer::struct_rlimit64_sz);
+ return res;
+}
+
+#define MSAN_MAYBE_INTERCEPT___GETRLIMIT INTERCEPT_FUNCTION(__getrlimit)
+#define MSAN_MAYBE_INTERCEPT_GETRLIMIT64 INTERCEPT_FUNCTION(getrlimit64)
+#define MSAN_MAYBE_INTERCEPT_PRLIMIT INTERCEPT_FUNCTION(prlimit)
+#define MSAN_MAYBE_INTERCEPT_PRLIMIT64 INTERCEPT_FUNCTION(prlimit64)
+#else
+#define MSAN_MAYBE_INTERCEPT___GETRLIMIT
+#define MSAN_MAYBE_INTERCEPT_GETRLIMIT64
+#define MSAN_MAYBE_INTERCEPT_PRLIMIT
+#define MSAN_MAYBE_INTERCEPT_PRLIMIT64
+#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 && !SANITIZER_NETBSD
+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 && !SANITIZER_NETBSD
+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(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.
+ return AllocateFromLocalPool(nmemb * size);
+ return msan_calloc(nmemb, size, &stack);
+}
+
+INTERCEPTOR(void *, realloc, void *ptr, SIZE_T size) {
+ GET_MALLOC_STACK_TRACE;
+ if (UNLIKELY(IsInDlsymAllocPool(ptr))) {
+ uptr offset = (uptr)ptr - (uptr)alloc_memory_for_dlsym;
+ uptr copy_size = Min(size, kDlsymAllocPoolSize - offset);
+ void *new_ptr;
+ if (UNLIKELY(!msan_inited)) {
+ new_ptr = AllocateFromLocalPool(copy_size);
+ } else {
+ copy_size = size;
+ new_ptr = msan_malloc(copy_size, &stack);
+ }
+ internal_memcpy(new_ptr, ptr, copy_size);
+ return new_ptr;
+ }
+ return msan_realloc(ptr, size, &stack);
+}
+
+INTERCEPTOR(void *, reallocarray, void *ptr, SIZE_T nmemb, SIZE_T size) {
+ GET_MALLOC_STACK_TRACE;
+ return msan_reallocarray(ptr, nmemb, size, &stack);
+}
+
+INTERCEPTOR(void *, malloc, SIZE_T size) {
+ GET_MALLOC_STACK_TRACE;
+ if (UNLIKELY(!msan_inited))
+ // Hack: dlsym calls malloc before REAL(malloc) is retrieved from dlsym.
+ return AllocateFromLocalPool(size);
+ return msan_malloc(size, &stack);
+}
+
+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);
+ }
+}
+
+void __msan_copy_shadow(void *dest, const void *src, uptr n) {
+ GET_STORE_STACK_TRACE;
+ MoveShadowAndOrigin(dest, src, n, &stack);
+}
+
+void __sanitizer_dtor_callback(const void *data, uptr size) {
+ GET_MALLOC_STACK_TRACE;
+ if (flags()->poison_in_dtor) {
+ stack.tag = STACK_TRACE_TAG_POISON;
+ PoisonMemory(data, size, &stack);
+ }
+}
+
+template <class Mmap>
+static void *mmap_interceptor(Mmap real_mmap, void *addr, SIZE_T length,
+ int prot, int flags, int fd, OFF64_T offset) {
+ if (addr && !MEM_IS_APP(addr)) {
+ if (flags & map_fixed) {
+ errno = errno_EINVAL;
+ return (void *)-1;
+ } else {
+ addr = nullptr;
+ }
+ }
+ void *res = real_mmap(addr, length, prot, flags, fd, offset);
+ if (res != (void *)-1) __msan_unpoison(res, RoundUpTo(length, GetPageSize()));
+ 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);
+}
+
+static void read_sigaction(const __sanitizer_sigaction *act) {
+ CHECK_UNPOISONED(&act->sa_flags, sizeof(act->sa_flags));
+ if (act->sa_flags & __sanitizer::sa_siginfo)
+ CHECK_UNPOISONED(&act->sigaction, sizeof(act->sigaction));
+ else
+ CHECK_UNPOISONED(&act->handler, sizeof(act->handler));
+ CHECK_UNPOISONED(&act->sa_mask, sizeof(act->sa_mask));
+}
+
+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) {
+ 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;
+}
+
+#if SANITIZER_NETBSD
+INTERCEPTOR(void, __libc_thr_keycreate, void *m, void (*dtor)(void *value)) \
+ ALIAS(WRAPPER_NAME(pthread_key_create));
+#endif
+
+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();
+ InterceptorScope interceptor_scope;
+ 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;
+};
+
+struct InterceptorContext {
+ BlockingMutex atexit_mu;
+ Vector<struct MSanAtExitRecord *> AtExitStack;
+
+ InterceptorContext()
+ : AtExitStack() {
+ }
+};
+
+static ALIGNED(64) char interceptor_placeholder[sizeof(InterceptorContext)];
+InterceptorContext *interceptor_ctx() {
+ return reinterpret_cast<InterceptorContext*>(&interceptor_placeholder[0]);
+}
+
+void MSanAtExitWrapper() {
+ MSanAtExitRecord *r;
+ {
+ BlockingMutexLock l(&interceptor_ctx()->atexit_mu);
+
+ uptr element = interceptor_ctx()->AtExitStack.Size() - 1;
+ r = interceptor_ctx()->AtExitStack[element];
+ interceptor_ctx()->AtExitStack.PopBack();
+ }
+
+ UnpoisonParam(1);
+ ((void(*)())r->func)();
+ InternalFree(r);
+}
+
+void MSanCxaAtExitWrapper(void *arg) {
+ UnpoisonParam(1);
+ MSanAtExitRecord *r = (MSanAtExitRecord *)arg;
+ // libc before 2.27 had race which caused occasional double handler execution
+ // https://sourceware.org/ml/libc-alpha/2017-08/msg01204.html
+ if (!r->func)
+ return;
+ r->func(r->arg);
+ r->func = nullptr;
+}
+
+static int setup_at_exit_wrapper(void(*f)(), void *arg, void *dso);
+
+// Unpoison argument shadow for C++ module destructors.
+INTERCEPTOR(int, __cxa_atexit, void (*func)(void *), void *arg,
+ void *dso_handle) {
+ if (msan_init_is_running) return REAL(__cxa_atexit)(func, arg, dso_handle);
+ return setup_at_exit_wrapper((void(*)())func, arg, dso_handle);
+}
+
+// Unpoison argument shadow for C++ module destructors.
+INTERCEPTOR(int, atexit, void (*func)()) {
+ // Avoid calling real atexit as it is unrechable on at least on Linux.
+ if (msan_init_is_running)
+ return REAL(__cxa_atexit)((void (*)(void *a))func, 0, 0);
+ return setup_at_exit_wrapper((void(*)())func, 0, 0);
+}
+
+static int setup_at_exit_wrapper(void(*f)(), void *arg, void *dso) {
+ ENSURE_MSAN_INITED();
+ MSanAtExitRecord *r =
+ (MSanAtExitRecord *)InternalAlloc(sizeof(MSanAtExitRecord));
+ r->func = (void(*)(void *a))f;
+ r->arg = arg;
+ int res;
+ if (!dso) {
+ // NetBSD does not preserve the 2nd argument if dso is equal to 0
+ // Store ctx in a local stack-like structure
+
+ BlockingMutexLock l(&interceptor_ctx()->atexit_mu);
+
+ res = REAL(__cxa_atexit)((void (*)(void *a))MSanAtExitWrapper, 0, 0);
+ if (!res) {
+ interceptor_ctx()->AtExitStack.PushBack(r);
+ }
+ } else {
+ res = REAL(__cxa_atexit)(MSanCxaAtExitWrapper, r, dso);
+ }
+ return res;
+}
+
+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;
+}
+
+// NetBSD ships with openpty(3) in -lutil, that needs to be prebuilt explicitly
+// with MSan.
+#if SANITIZER_LINUX
+INTERCEPTOR(int, openpty, int *aparent, int *aworker, char *name,
+ const void *termp, const void *winp) {
+ ENSURE_MSAN_INITED();
+ InterceptorScope interceptor_scope;
+ int res = REAL(openpty)(aparent, aworker, name, termp, winp);
+ if (!res) {
+ __msan_unpoison(aparent, sizeof(*aparent));
+ __msan_unpoison(aworker, sizeof(*aworker));
+ }
+ return res;
+}
+#define MSAN_MAYBE_INTERCEPT_OPENPTY INTERCEPT_FUNCTION(openpty)
+#else
+#define MSAN_MAYBE_INTERCEPT_OPENPTY
+#endif
+
+// NetBSD ships with forkpty(3) in -lutil, that needs to be prebuilt explicitly
+// with MSan.
+#if SANITIZER_LINUX
+INTERCEPTOR(int, forkpty, int *aparent, char *name, const void *termp,
+ const void *winp) {
+ ENSURE_MSAN_INITED();
+ InterceptorScope interceptor_scope;
+ int res = REAL(forkpty)(aparent, name, termp, winp);
+ if (res != -1)
+ __msan_unpoison(aparent, sizeof(*aparent));
+ return res;
+}
+#define MSAN_MAYBE_INTERCEPT_FORKPTY INTERCEPT_FUNCTION(forkpty)
+#else
+#define MSAN_MAYBE_INTERCEPT_FORKPTY
+#endif
+
+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)) \
+ VReport(1, "MemorySanitizer: failed to intercept '%s'\n'", #name); \
+ } while (0)
+
+#define MSAN_INTERCEPT_FUNC_VER(name, ver) \
+ do { \
+ if (!INTERCEPT_FUNCTION_VER(name, ver)) \
+ VReport(1, "MemorySanitizer: failed to intercept '%s@@%s'\n", #name, \
+ #ver); \
+ } while (0)
+
+#define COMMON_INTERCEPT_FUNCTION(name) MSAN_INTERCEPT_FUNC(name)
+#define COMMON_INTERCEPT_FUNCTION_VER(name, ver) \
+ MSAN_INTERCEPT_FUNC_VER(name, ver)
+#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__); \
+ ENSURE_MSAN_INITED(); \
+ MSanInterceptorContext msan_ctx = {IsInInterceptorScope()}; \
+ ctx = (void *)&msan_ctx; \
+ (void)ctx; \
+ InterceptorScope interceptor_scope; \
+ __msan_unpoison(__errno_location(), sizeof(int)); /* NOLINT */
+#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 (filename && map) \
+ ForEachMappedRegion(map, __msan_unpoison); \
+ } while (false)
+
+#define COMMON_INTERCEPTOR_GET_TLS_RANGE(begin, end) \
+ if (MsanThread *t = GetCurrentThread()) { \
+ *begin = t->tls_begin(); \
+ *end = t->tls_end(); \
+ } else { \
+ *begin = *end = 0; \
+ }
+
+#define COMMON_INTERCEPTOR_MEMSET_IMPL(ctx, block, c, size) \
+ { \
+ (void)ctx; \
+ return __msan_memset(block, c, size); \
+ }
+#define COMMON_INTERCEPTOR_MEMMOVE_IMPL(ctx, to, from, size) \
+ { \
+ (void)ctx; \
+ return __msan_memmove(to, from, size); \
+ }
+#define COMMON_INTERCEPTOR_MEMCPY_IMPL(ctx, to, from, size) \
+ { \
+ (void)ctx; \
+ return __msan_memcpy(to, from, size); \
+ }
+
+#define COMMON_INTERCEPTOR_COPY_STRING(ctx, to, from, size) \
+ do { \
+ GET_STORE_STACK_TRACE; \
+ CopyShadowAndOrigin(to, from, size, &stack); \
+ __msan_unpoison(to + size, 1); \
+ } while (false)
+
+#define COMMON_INTERCEPTOR_MMAP_IMPL(ctx, mmap, addr, length, prot, flags, fd, \
+ offset) \
+ do { \
+ return mmap_interceptor(REAL(mmap), addr, sz, prot, flags, fd, off); \
+ } while (false)
+
+#include "sanitizer_common/sanitizer_platform_interceptors.h"
+#include "sanitizer_common/sanitizer_common_interceptors.inc"
+
+static uptr signal_impl(int signo, uptr cb);
+static int sigaction_impl(int signo, const __sanitizer_sigaction *act,
+ __sanitizer_sigaction *oldact);
+
+#define SIGNAL_INTERCEPTOR_SIGACTION_IMPL(signo, act, oldact) \
+ { return sigaction_impl(signo, act, oldact); }
+
+#define SIGNAL_INTERCEPTOR_SIGNAL_IMPL(func, signo, handler) \
+ { \
+ handler = signal_impl(signo, handler); \
+ InterceptorScope interceptor_scope; \
+ return REAL(func)(signo, handler); \
+ }
+
+#include "sanitizer_common/sanitizer_signal_interceptors.inc"
+
+static int sigaction_impl(int signo, const __sanitizer_sigaction *act,
+ __sanitizer_sigaction *oldact) {
+ ENSURE_MSAN_INITED();
+ if (act) read_sigaction(act);
+ 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 : nullptr;
+ 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 = (decltype(pnew_act->sigaction))new_cb;
+ }
+ }
+ res = REAL(SIGACTION_SYMNAME)(signo, pnew_act, oldact);
+ if (res == 0 && oldact) {
+ uptr cb = (uptr)oldact->sigaction;
+ if (cb == (uptr)SignalAction || cb == (uptr)SignalHandler) {
+ oldact->sigaction = (decltype(oldact->sigaction))old_cb;
+ }
+ }
+ } else {
+ res = REAL(SIGACTION_SYMNAME)(signo, act, oldact);
+ }
+
+ if (res == 0 && oldact) {
+ __msan_unpoison(oldact, sizeof(__sanitizer_sigaction));
+ }
+ return res;
+}
+
+static uptr signal_impl(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 cb;
+}
+
+#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"
+#include "sanitizer_common/sanitizer_syscalls_netbsd.inc"
+
+struct dlinfo {
+ char *dli_fname;
+ void *dli_fbase;
+ char *dli_sname;
+ void *dli_saddr;
+};
+
+INTERCEPTOR(int, dladdr, void *addr, dlinfo *info) {
+ void *ctx;
+ COMMON_INTERCEPTOR_ENTER(ctx, dladdr, addr, info);
+ 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) {
+ void *ctx;
+ COMMON_INTERCEPTOR_ENTER(ctx, dlerror, fake);
+ char *res = REAL(dlerror)(fake);
+ if (res) __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_phdr && info->dlpi_phnum)
+ __msan_unpoison(info->dlpi_phdr, struct_ElfW_Phdr_sz * info->dlpi_phnum);
+ 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(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;
+}
+
+INTERCEPTOR(int, dl_iterate_phdr, dl_iterate_phdr_cb callback, void *data) {
+ void *ctx;
+ COMMON_INTERCEPTOR_ENTER(ctx, dl_iterate_phdr, callback, data);
+ 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;
+}
+
+// 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;
+}
+
+INTERCEPTOR(wchar_t *, wcsncpy, wchar_t *dest, const wchar_t *src, SIZE_T n) {
+ ENSURE_MSAN_INITED();
+ GET_STORE_STACK_TRACE;
+ SIZE_T copy_size = REAL(wcsnlen)(src, n);
+ if (copy_size < n) copy_size++; // trailing \0
+ wchar_t *res = REAL(wcsncpy)(dest, src, n);
+ CopyShadowAndOrigin(dest, src, copy_size * sizeof(wchar_t), &stack);
+ __msan_unpoison(dest + copy_size, (n - copy_size) * sizeof(wchar_t));
+ return res;
+}
+
+// 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_unpoison_param(uptr n) { UnpoisonParam(n); }
+
+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 || __msan::IsInSymbolizer())
+ 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);
+
+ new(interceptor_ctx()) InterceptorContext();
+
+ InitializeCommonInterceptors();
+ InitializeSignalInterceptors();
+
+ INTERCEPT_FUNCTION(posix_memalign);
+ MSAN_MAYBE_INTERCEPT_MEMALIGN;
+ MSAN_MAYBE_INTERCEPT___LIBC_MEMALIGN;
+ INTERCEPT_FUNCTION(valloc);
+ MSAN_MAYBE_INTERCEPT_PVALLOC;
+ INTERCEPT_FUNCTION(malloc);
+ INTERCEPT_FUNCTION(calloc);
+ INTERCEPT_FUNCTION(realloc);
+ INTERCEPT_FUNCTION(reallocarray);
+ INTERCEPT_FUNCTION(free);
+ MSAN_MAYBE_INTERCEPT_CFREE;
+ MSAN_MAYBE_INTERCEPT_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(memccpy);
+ MSAN_MAYBE_INTERCEPT_MEMPCPY;
+ INTERCEPT_FUNCTION(bcopy);
+ INTERCEPT_FUNCTION(wmemset);
+ INTERCEPT_FUNCTION(wmemcpy);
+ MSAN_MAYBE_INTERCEPT_WMEMPCPY;
+ INTERCEPT_FUNCTION(wmemmove);
+ INTERCEPT_FUNCTION(strcpy);
+ MSAN_MAYBE_INTERCEPT_STPCPY;
+ INTERCEPT_FUNCTION(strdup);
+ MSAN_MAYBE_INTERCEPT___STRDUP;
+ INTERCEPT_FUNCTION(strncpy);
+ MSAN_MAYBE_INTERCEPT_GCVT;
+ INTERCEPT_FUNCTION(strcat);
+ INTERCEPT_FUNCTION(strncat);
+ INTERCEPT_STRTO(strtod);
+ INTERCEPT_STRTO(strtof);
+ INTERCEPT_STRTO(strtold);
+ INTERCEPT_STRTO(strtol);
+ INTERCEPT_STRTO(strtoul);
+ INTERCEPT_STRTO(strtoll);
+ INTERCEPT_STRTO(strtoull);
+ INTERCEPT_STRTO(strtouq);
+ INTERCEPT_STRTO(wcstod);
+ INTERCEPT_STRTO(wcstof);
+ INTERCEPT_STRTO(wcstold);
+ INTERCEPT_STRTO(wcstol);
+ INTERCEPT_STRTO(wcstoul);
+ INTERCEPT_STRTO(wcstoll);
+ INTERCEPT_STRTO(wcstoull);
+#ifdef SANITIZER_NLDBL_VERSION
+ INTERCEPT_FUNCTION_VER(vswprintf, SANITIZER_NLDBL_VERSION);
+ INTERCEPT_FUNCTION_VER(swprintf, SANITIZER_NLDBL_VERSION);
+#else
+ INTERCEPT_FUNCTION(vswprintf);
+ INTERCEPT_FUNCTION(swprintf);
+#endif
+ 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(wcsnlen);
+ INTERCEPT_FUNCTION(wcschr);
+ INTERCEPT_FUNCTION(wcscpy);
+ INTERCEPT_FUNCTION(wcsncpy);
+ INTERCEPT_FUNCTION(wcscmp);
+ INTERCEPT_FUNCTION(getenv);
+ INTERCEPT_FUNCTION(setenv);
+ INTERCEPT_FUNCTION(putenv);
+ INTERCEPT_FUNCTION(gettimeofday);
+ MSAN_MAYBE_INTERCEPT_FCVT;
+ MSAN_MAYBE_INTERCEPT_FSTAT;
+ MSAN_MAYBE_INTERCEPT___FXSTAT;
+ MSAN_INTERCEPT_FSTATAT;
+ MSAN_MAYBE_INTERCEPT___FXSTAT64;
+ MSAN_MAYBE_INTERCEPT___FXSTATAT64;
+ INTERCEPT_FUNCTION(pipe);
+ INTERCEPT_FUNCTION(pipe2);
+ INTERCEPT_FUNCTION(socketpair);
+ MSAN_MAYBE_INTERCEPT_FGETS_UNLOCKED;
+ INTERCEPT_FUNCTION(getrlimit);
+ MSAN_MAYBE_INTERCEPT___GETRLIMIT;
+ MSAN_MAYBE_INTERCEPT_GETRLIMIT64;
+ MSAN_MAYBE_INTERCEPT_PRLIMIT;
+ MSAN_MAYBE_INTERCEPT_PRLIMIT64;
+ MSAN_INTERCEPT_UNAME;
+ INTERCEPT_FUNCTION(gethostname);
+ MSAN_MAYBE_INTERCEPT_EPOLL_WAIT;
+ MSAN_MAYBE_INTERCEPT_EPOLL_PWAIT;
+ INTERCEPT_FUNCTION(dladdr);
+ INTERCEPT_FUNCTION(dlerror);
+ INTERCEPT_FUNCTION(dl_iterate_phdr);
+ INTERCEPT_FUNCTION(getrusage);
+#if defined(__mips__)
+ INTERCEPT_FUNCTION_VER(pthread_create, "GLIBC_2.2");
+#else
+ INTERCEPT_FUNCTION(pthread_create);
+#endif
+ INTERCEPT_FUNCTION(pthread_key_create);
+
+#if SANITIZER_NETBSD
+ INTERCEPT_FUNCTION(__libc_thr_keycreate);
+#endif
+
+ INTERCEPT_FUNCTION(pthread_join);
+ INTERCEPT_FUNCTION(tzset);
+ INTERCEPT_FUNCTION(atexit);
+ INTERCEPT_FUNCTION(__cxa_atexit);
+ INTERCEPT_FUNCTION(shmat);
+ INTERCEPT_FUNCTION(fork);
+ MSAN_MAYBE_INTERCEPT_OPENPTY;
+ MSAN_MAYBE_INTERCEPT_FORKPTY;
+
+ inited = 1;
+}
+} // namespace __msan