diff --git a/compiler-rt/lib/asan/asan_interceptors.cpp b/compiler-rt/lib/asan/asan_interceptors.cpp
--- a/compiler-rt/lib/asan/asan_interceptors.cpp
+++ b/compiler-rt/lib/asan/asan_interceptors.cpp
@@ -49,8 +49,8 @@
   ASAN_READ_RANGE((ctx), (s),                                   \
     common_flags()->strict_string_checks ? (len) + 1 : (n))
 
-#define ASAN_READ_STRING(ctx, s, n)                             \
-  ASAN_READ_STRING_OF_LEN((ctx), (s), REAL(strlen)(s), (n))
+#  define ASAN_READ_STRING(ctx, s, n) \
+    ASAN_READ_STRING_OF_LEN((ctx), (s), internal_strlen(s), (n))
 
 static inline uptr MaybeRealStrnlen(const char *s, uptr maxlen) {
 #if SANITIZER_INTERCEPT_STRNLEN
@@ -370,9 +370,9 @@
     ASAN_INTERCEPTOR_ENTER(ctx, strcat);
     ENSURE_ASAN_INITED();
     if (flags()->replace_str) {
-      uptr from_length = REAL(strlen)(from);
+      uptr from_length = internal_strlen(from);
       ASAN_READ_RANGE(ctx, from, from_length + 1);
-      uptr to_length = REAL(strlen)(to);
+      uptr to_length = internal_strlen(to);
       ASAN_READ_STRING_OF_LEN(ctx, to, to_length, to_length);
       ASAN_WRITE_RANGE(ctx, to + to_length, from_length + 1);
       // If the copying actually happens, the |from| string should not overlap
@@ -394,7 +394,7 @@
     uptr from_length = MaybeRealStrnlen(from, size);
     uptr copy_length = Min(size, from_length + 1);
     ASAN_READ_RANGE(ctx, from, copy_length);
-    uptr to_length = REAL(strlen)(to);
+    uptr to_length = internal_strlen(to);
     ASAN_READ_STRING_OF_LEN(ctx, to, to_length, to_length);
     ASAN_WRITE_RANGE(ctx, to + to_length, from_length + 1);
     if (from_length > 0) {
@@ -419,7 +419,7 @@
   }
   ENSURE_ASAN_INITED();
   if (flags()->replace_str) {
-    uptr from_size = REAL(strlen)(from) + 1;
+    uptr from_size = internal_strlen(from) + 1;
     CHECK_RANGES_OVERLAP("strcpy", to, from_size, from, from_size);
     ASAN_READ_RANGE(ctx, from, from_size);
     ASAN_WRITE_RANGE(ctx, to, from_size);
@@ -432,7 +432,7 @@
   ASAN_INTERCEPTOR_ENTER(ctx, strdup);
   if (UNLIKELY(!asan_inited)) return internal_strdup(s);
   ENSURE_ASAN_INITED();
-  uptr length = REAL(strlen)(s);
+  uptr length = internal_strlen(s);
   if (flags()->replace_str) {
     ASAN_READ_RANGE(ctx, s, length + 1);
   }
@@ -448,7 +448,7 @@
   ASAN_INTERCEPTOR_ENTER(ctx, strdup);
   if (UNLIKELY(!asan_inited)) return internal_strdup(s);
   ENSURE_ASAN_INITED();
-  uptr length = REAL(strlen)(s);
+  uptr length = internal_strlen(s);
   if (flags()->replace_str) {
     ASAN_READ_RANGE(ctx, s, length + 1);
   }
diff --git a/compiler-rt/lib/memprof/memprof_interceptors.cpp b/compiler-rt/lib/memprof/memprof_interceptors.cpp
--- a/compiler-rt/lib/memprof/memprof_interceptors.cpp
+++ b/compiler-rt/lib/memprof/memprof_interceptors.cpp
@@ -204,9 +204,9 @@
   void *ctx;
   MEMPROF_INTERCEPTOR_ENTER(ctx, strcat);
   ENSURE_MEMPROF_INITED();
-  uptr from_length = REAL(strlen)(from);
+  uptr from_length = internal_strlen(from);
   MEMPROF_READ_RANGE(from, from_length + 1);
-  uptr to_length = REAL(strlen)(to);
+  uptr to_length = internal_strlen(to);
   MEMPROF_READ_STRING(to, to_length);
   MEMPROF_WRITE_RANGE(to + to_length, from_length + 1);
   return REAL(strcat)(to, from);
@@ -219,7 +219,7 @@
   uptr from_length = MaybeRealStrnlen(from, size);
   uptr copy_length = Min(size, from_length + 1);
   MEMPROF_READ_RANGE(from, copy_length);
-  uptr to_length = REAL(strlen)(to);
+  uptr to_length = internal_strlen(to);
   MEMPROF_READ_STRING(to, to_length);
   MEMPROF_WRITE_RANGE(to + to_length, from_length + 1);
   return REAL(strncat)(to, from, size);
@@ -232,7 +232,7 @@
     return REAL(strcpy)(to, from);
   }
   ENSURE_MEMPROF_INITED();
-  uptr from_size = REAL(strlen)(from) + 1;
+  uptr from_size = internal_strlen(from) + 1;
   MEMPROF_READ_RANGE(from, from_size);
   MEMPROF_WRITE_RANGE(to, from_size);
   return REAL(strcpy)(to, from);
@@ -244,7 +244,7 @@
   if (UNLIKELY(!memprof_inited))
     return internal_strdup(s);
   ENSURE_MEMPROF_INITED();
-  uptr length = REAL(strlen)(s);
+  uptr length = internal_strlen(s);
   MEMPROF_READ_RANGE(s, length + 1);
   GET_STACK_TRACE_MALLOC;
   void *new_mem = memprof_malloc(length + 1, &stack);
@@ -258,7 +258,7 @@
   if (UNLIKELY(!memprof_inited))
     return internal_strdup(s);
   ENSURE_MEMPROF_INITED();
-  uptr length = REAL(strlen)(s);
+  uptr length = internal_strlen(s);
   MEMPROF_READ_RANGE(s, length + 1);
   GET_STACK_TRACE_MALLOC;
   void *new_mem = memprof_malloc(length + 1, &stack);
diff --git a/compiler-rt/lib/msan/msan_interceptors.cpp b/compiler-rt/lib/msan/msan_interceptors.cpp
--- a/compiler-rt/lib/msan/msan_interceptors.cpp
+++ b/compiler-rt/lib/msan/msan_interceptors.cpp
@@ -286,7 +286,7 @@
 INTERCEPTOR(char *, strcpy, char *dest, const char *src) {
   ENSURE_MSAN_INITED();
   GET_STORE_STACK_TRACE;
-  SIZE_T n = REAL(strlen)(src);
+  SIZE_T n = internal_strlen(src);
   CHECK_UNPOISONED_STRING(src + n, 0);
   char *res = REAL(strcpy)(dest, src);
   CopyShadowAndOrigin(dest, src, n + 1, &stack);
@@ -296,7 +296,7 @@
 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);
+  SIZE_T copy_size = internal_strnlen(src, n);
   if (copy_size < n)
     copy_size++;  // trailing \0
   char *res = REAL(strncpy)(dest, src, n);
@@ -309,7 +309,7 @@
 INTERCEPTOR(char *, stpcpy, char *dest, const char *src) {
   ENSURE_MSAN_INITED();
   GET_STORE_STACK_TRACE;
-  SIZE_T n = REAL(strlen)(src);
+  SIZE_T n = internal_strlen(src);
   CHECK_UNPOISONED_STRING(src + n, 0);
   char *res = REAL(stpcpy)(dest, src);
   CopyShadowAndOrigin(dest, src, n + 1, &stack);
@@ -325,7 +325,7 @@
   GET_STORE_STACK_TRACE;
   // On FreeBSD strdup() leverages strlen().
   InterceptorScope interceptor_scope;
-  SIZE_T n = REAL(strlen)(src);
+  SIZE_T n = internal_strlen(src);
   CHECK_UNPOISONED_STRING(src + n, 0);
   char *res = REAL(strdup)(src);
   CopyShadowAndOrigin(res, src, n + 1, &stack);
@@ -336,7 +336,7 @@
 INTERCEPTOR(char *, __strdup, char *src) {
   ENSURE_MSAN_INITED();
   GET_STORE_STACK_TRACE;
-  SIZE_T n = REAL(strlen)(src);
+  SIZE_T n = internal_strlen(src);
   CHECK_UNPOISONED_STRING(src + n, 0);
   char *res = REAL(__strdup)(src);
   CopyShadowAndOrigin(res, src, n + 1, &stack);
@@ -351,7 +351,7 @@
 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);
+  SIZE_T n = internal_strlen(buf);
   __msan_unpoison(buf, n + 1);
   return res;
 }
@@ -363,8 +363,8 @@
 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);
+  SIZE_T src_size = internal_strlen(src);
+  SIZE_T dest_size = internal_strlen(dest);
   CHECK_UNPOISONED_STRING(src + src_size, 0);
   CHECK_UNPOISONED_STRING(dest + dest_size, 0);
   char *res = REAL(strcat)(dest, src);
@@ -375,8 +375,8 @@
 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);
+  SIZE_T dest_size = internal_strlen(dest);
+  SIZE_T copy_size = internal_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);
@@ -612,7 +612,8 @@
   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);
+  if (res)
+    __msan_unpoison(res, internal_strlen(res) + 1);
   return res;
 }
 #define MSAN_MAYBE_INTERCEPT_FCVT INTERCEPT_FUNCTION(fcvt)
@@ -625,7 +626,8 @@
     return REAL(getenv)(name);
   ENSURE_MSAN_INITED();
   char *res = REAL(getenv)(name);
-  if (res) __msan_unpoison(res, REAL(strlen)(res) + 1);
+  if (res)
+    __msan_unpoison(res, internal_strlen(res) + 1);
   return res;
 }
 
@@ -635,7 +637,7 @@
   char **envp = environ;
   for (; *envp; ++envp) {
     __msan_unpoison(envp, sizeof(*envp));
-    __msan_unpoison(*envp, REAL(strlen)(*envp) + 1);
+    __msan_unpoison(*envp, internal_strlen(*envp) + 1);
   }
   // Trailing NULL pointer.
   __msan_unpoison(envp, sizeof(*envp));
@@ -758,7 +760,7 @@
   ENSURE_MSAN_INITED();
   char *res = REAL(fgets_unlocked)(s, size, stream);
   if (res)
-    __msan_unpoison(s, REAL(strlen)(s) + 1);
+    __msan_unpoison(s, internal_strlen(s) + 1);
   return res;
 }
 #define MSAN_MAYBE_INTERCEPT_FGETS_UNLOCKED INTERCEPT_FUNCTION(fgets_unlocked)
@@ -829,7 +831,7 @@
   ENSURE_MSAN_INITED();
   int res = REAL(gethostname)(name, len);
   if (!res || (res == -1 && errno == errno_ENAMETOOLONG)) {
-    SIZE_T real_len = REAL(strnlen)(name, len);
+    SIZE_T real_len = internal_strnlen(name, len);
     if (real_len < len)
       ++real_len;
     __msan_unpoison(name, real_len);
@@ -1080,9 +1082,9 @@
   InterceptorScope interceptor_scope;
   REAL(tzset)(fake);
   if (tzname[0])
-    __msan_unpoison(tzname[0], REAL(strlen)(tzname[0]) + 1);
+    __msan_unpoison(tzname[0], internal_strlen(tzname[0]) + 1);
   if (tzname[1])
-    __msan_unpoison(tzname[1], REAL(strlen)(tzname[1]) + 1);
+    __msan_unpoison(tzname[1], internal_strlen(tzname[1]) + 1);
   return;
 }
 
@@ -1455,9 +1457,9 @@
   if (res != 0) {
     __msan_unpoison(info, sizeof(*info));
     if (info->dli_fname)
-      __msan_unpoison(info->dli_fname, REAL(strlen)(info->dli_fname) + 1);
+      __msan_unpoison(info->dli_fname, internal_strlen(info->dli_fname) + 1);
     if (info->dli_sname)
-      __msan_unpoison(info->dli_sname, REAL(strlen)(info->dli_sname) + 1);
+      __msan_unpoison(info->dli_sname, internal_strlen(info->dli_sname) + 1);
   }
   return res;
 }
@@ -1466,7 +1468,8 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, dlerror, fake);
   char *res = REAL(dlerror)(fake);
-  if (res) __msan_unpoison(res, REAL(strlen)(res) + 1);
+  if (res)
+    __msan_unpoison(res, internal_strlen(res) + 1);
   return res;
 }
 
@@ -1484,7 +1487,7 @@
     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);
+      __msan_unpoison(info->dlpi_name, internal_strlen(info->dlpi_name) + 1);
   }
   dl_iterate_phdr_data *cbdata = (dl_iterate_phdr_data *)data;
   UnpoisonParam(3);
@@ -1526,7 +1529,7 @@
   ENSURE_MSAN_INITED();
   GET_STORE_STACK_TRACE;
   wchar_t *res = REAL(wcscpy)(dest, src);
-  CopyShadowAndOrigin(dest, src, sizeof(wchar_t) * (REAL(wcslen)(src) + 1),
+  CopyShadowAndOrigin(dest, src, sizeof(wchar_t) * (internal_wcslen(src) + 1),
                       &stack);
   return res;
 }
@@ -1534,7 +1537,7 @@
 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);
+  SIZE_T copy_size = internal_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);
@@ -1598,7 +1601,7 @@
 
 void __msan_unpoison_string(const char* s) {
   if (!MEM_IS_APP(s)) return;
-  __msan_unpoison(s, REAL(strlen)(s) + 1);
+  __msan_unpoison(s, internal_strlen(s) + 1);
 }
 
 namespace __msan {
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
--- a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
@@ -204,7 +204,7 @@
 
 #define COMMON_INTERCEPTOR_READ_STRING(ctx, s, n)                   \
     COMMON_INTERCEPTOR_READ_RANGE((ctx), (s),                       \
-      common_flags()->strict_string_checks ? (REAL(strlen)(s)) + 1 : (n) )
+      common_flags()->strict_string_checks ? (internal_strlen(s)) + 1 : (n) )
 
 #ifndef COMMON_INTERCEPTOR_ON_DLOPEN
 #define COMMON_INTERCEPTOR_ON_DLOPEN(filename, flag) \
@@ -435,7 +435,7 @@
   if (domainname) COMMON_INTERCEPTOR_READ_STRING(ctx, domainname, 0);
   char *domain = REAL(textdomain)(domainname);
   if (domain) {
-    COMMON_INTERCEPTOR_INITIALIZE_RANGE(domain, REAL(strlen)(domain) + 1);
+    COMMON_INTERCEPTOR_INITIALIZE_RANGE(domain, internal_strlen(domain) + 1);
   }
   return domain;
 }
@@ -575,8 +575,8 @@
 #if SANITIZER_INTERCEPT_STRSTR || SANITIZER_INTERCEPT_STRCASESTR
 static inline void StrstrCheck(void *ctx, char *r, const char *s1,
                                const char *s2) {
-    uptr len1 = REAL(strlen)(s1);
-    uptr len2 = REAL(strlen)(s2);
+    uptr len1 = internal_strlen(s1);
+    uptr len2 = internal_strlen(s2);
     COMMON_INTERCEPTOR_READ_STRING(ctx, s1, r ? r - s1 + len2 : len1 + 1);
     COMMON_INTERCEPTOR_READ_RANGE(ctx, s2, len2 + 1);
 }
@@ -640,10 +640,10 @@
     // for subsequent calls). We do not need to check strtok's result.
     // As the delimiters can change, we check them every call.
     if (str != nullptr) {
-      COMMON_INTERCEPTOR_READ_RANGE(ctx, str, REAL(strlen)(str) + 1);
+      COMMON_INTERCEPTOR_READ_RANGE(ctx, str, internal_strlen(str) + 1);
     }
     COMMON_INTERCEPTOR_READ_RANGE(ctx, delimiters,
-                                  REAL(strlen)(delimiters) + 1);
+                                  internal_strlen(delimiters) + 1);
     return REAL(strtok)(str, delimiters);
   } else {
     // However, when strict_string_checks is disabled we cannot check the
@@ -657,11 +657,11 @@
     COMMON_INTERCEPTOR_READ_RANGE(ctx, delimiters, 1);
     char *result = REAL(strtok)(str, delimiters);
     if (result != nullptr) {
-      COMMON_INTERCEPTOR_READ_RANGE(ctx, result, REAL(strlen)(result) + 1);
+      COMMON_INTERCEPTOR_READ_RANGE(ctx, result, internal_strlen(result) + 1);
     } else if (str != nullptr) {
       // No delimiter were found, it's safe to assume that the entire str was
       // scanned.
-      COMMON_INTERCEPTOR_READ_RANGE(ctx, str, REAL(strlen)(str) + 1);
+      COMMON_INTERCEPTOR_READ_RANGE(ctx, str, internal_strlen(str) + 1);
     }
     return result;
   }
@@ -706,7 +706,7 @@
   if (common_flags()->intercept_strchr) {
     // Keep strlen as macro argument, as macro may ignore it.
     COMMON_INTERCEPTOR_READ_STRING(ctx, s,
-      (result ? result - s : REAL(strlen)(s)) + 1);
+      (result ? result - s : internal_strlen(s)) + 1);
   }
   return result;
 }
@@ -737,7 +737,7 @@
     return internal_strrchr(s, c);
   COMMON_INTERCEPTOR_ENTER(ctx, strrchr, s, c);
   if (common_flags()->intercept_strchr)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, s, REAL(strlen)(s) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, s, internal_strlen(s) + 1);
   return REAL(strrchr)(s, c);
 }
 #define INIT_STRRCHR COMMON_INTERCEPT_FUNCTION(strrchr)
@@ -751,7 +751,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, strspn, s1, s2);
   SIZE_T r = REAL(strspn)(s1, s2);
   if (common_flags()->intercept_strspn) {
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, s2, REAL(strlen)(s2) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, s2, internal_strlen(s2) + 1);
     COMMON_INTERCEPTOR_READ_STRING(ctx, s1, r + 1);
   }
   return r;
@@ -762,7 +762,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, strcspn, s1, s2);
   SIZE_T r = REAL(strcspn)(s1, s2);
   if (common_flags()->intercept_strspn) {
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, s2, REAL(strlen)(s2) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, s2, internal_strlen(s2) + 1);
     COMMON_INTERCEPTOR_READ_STRING(ctx, s1, r + 1);
   }
   return r;
@@ -781,9 +781,9 @@
   COMMON_INTERCEPTOR_ENTER(ctx, strpbrk, s1, s2);
   char *r = REAL(strpbrk)(s1, s2);
   if (common_flags()->intercept_strpbrk) {
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, s2, REAL(strlen)(s2) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, s2, internal_strlen(s2) + 1);
     COMMON_INTERCEPTOR_READ_STRING(ctx, s1,
-        r ? r - s1 + 1 : REAL(strlen)(s1) + 1);
+        r ? r - s1 + 1 : internal_strlen(s1) + 1);
   }
   return r;
 }
@@ -1251,7 +1251,7 @@
   // https://github.com/google/sanitizers/issues/321.
   char *res = REAL(fgets)(s, size, file);
   if (res)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, s, REAL(strlen)(s) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, s, internal_strlen(s) + 1);
   return res;
 }
 #define INIT_FGETS COMMON_INTERCEPT_FUNCTION(fgets)
@@ -1265,7 +1265,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, fputs, s, file);
   if (!SANITIZER_MAC || s) {  // `fputs(NULL, file)` is supported on Darwin.
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, s, REAL(strlen)(s) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, s, internal_strlen(s) + 1);
   }
   return REAL(fputs)(s, file);
 }
@@ -1280,7 +1280,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, puts, s);
   if (!SANITIZER_MAC || s) {  // `puts(NULL)` is supported on Darwin.
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, s, REAL(strlen)(s) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, s, internal_strlen(s) + 1);
   }
   return REAL(puts)(s);
 }
@@ -1387,7 +1387,7 @@
   char *res = REAL(ctime)(timep);
   if (res) {
     COMMON_INTERCEPTOR_READ_RANGE(ctx, timep, sizeof(*timep));
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, internal_strlen(res) + 1);
   }
   return res;
 }
@@ -1400,7 +1400,7 @@
   char *res = REAL(ctime_r)(timep, result);
   if (res) {
     COMMON_INTERCEPTOR_READ_RANGE(ctx, timep, sizeof(*timep));
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, internal_strlen(res) + 1);
   }
   return res;
 }
@@ -1413,7 +1413,7 @@
   char *res = REAL(asctime)(tm);
   if (res) {
     COMMON_INTERCEPTOR_READ_RANGE(ctx, tm, sizeof(*tm));
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, internal_strlen(res) + 1);
   }
   return res;
 }
@@ -1426,7 +1426,7 @@
   char *res = REAL(asctime_r)(tm, result);
   if (res) {
     COMMON_INTERCEPTOR_READ_RANGE(ctx, tm, sizeof(*tm));
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, internal_strlen(res) + 1);
   }
   return res;
 }
@@ -1463,7 +1463,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, strptime, s, format, tm);
   if (format)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, format, REAL(strlen)(format) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, format, internal_strlen(format) + 1);
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
@@ -1869,26 +1869,26 @@
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwd, sizeof(*pwd));
     if (pwd->pw_name)
       COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwd->pw_name,
-                                     REAL(strlen)(pwd->pw_name) + 1);
+                                     internal_strlen(pwd->pw_name) + 1);
     if (pwd->pw_passwd)
       COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwd->pw_passwd,
-                                     REAL(strlen)(pwd->pw_passwd) + 1);
+                                     internal_strlen(pwd->pw_passwd) + 1);
 #if !SANITIZER_ANDROID
     if (pwd->pw_gecos)
       COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwd->pw_gecos,
-                                     REAL(strlen)(pwd->pw_gecos) + 1);
+                                     internal_strlen(pwd->pw_gecos) + 1);
 #endif
 #if SANITIZER_MAC || SANITIZER_FREEBSD || SANITIZER_NETBSD
     if (pwd->pw_class)
       COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwd->pw_class,
-                                     REAL(strlen)(pwd->pw_class) + 1);
+                                     internal_strlen(pwd->pw_class) + 1);
 #endif
     if (pwd->pw_dir)
       COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwd->pw_dir,
-                                     REAL(strlen)(pwd->pw_dir) + 1);
+                                     internal_strlen(pwd->pw_dir) + 1);
     if (pwd->pw_shell)
       COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwd->pw_shell,
-                                     REAL(strlen)(pwd->pw_shell) + 1);
+                                     internal_strlen(pwd->pw_shell) + 1);
   }
 }
 
@@ -1897,13 +1897,13 @@
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, grp, sizeof(*grp));
     if (grp->gr_name)
       COMMON_INTERCEPTOR_WRITE_RANGE(ctx, grp->gr_name,
-                                     REAL(strlen)(grp->gr_name) + 1);
+                                     internal_strlen(grp->gr_name) + 1);
     if (grp->gr_passwd)
       COMMON_INTERCEPTOR_WRITE_RANGE(ctx, grp->gr_passwd,
-                                     REAL(strlen)(grp->gr_passwd) + 1);
+                                     internal_strlen(grp->gr_passwd) + 1);
     char **p = grp->gr_mem;
     for (; *p; ++p) {
-      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *p, REAL(strlen)(*p) + 1);
+      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *p, internal_strlen(*p) + 1);
     }
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, grp->gr_mem,
                                    (p - grp->gr_mem + 1) * sizeof(*p));
@@ -1916,7 +1916,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, getpwnam, name);
   if (name)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
   __sanitizer_passwd *res = REAL(getpwnam)(name);
   unpoison_passwd(ctx, res);
   return res;
@@ -1931,7 +1931,7 @@
 INTERCEPTOR(__sanitizer_group *, getgrnam, const char *name) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, getgrnam, name);
-  COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
+  COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
   __sanitizer_group *res = REAL(getgrnam)(name);
   unpoison_group(ctx, res);
   return res;
@@ -1957,7 +1957,7 @@
             char *buf, SIZE_T buflen, __sanitizer_passwd **result) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, getpwnam_r, name, pwd, buf, buflen, result);
-  COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
+  COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
@@ -1984,7 +1984,7 @@
             char *buf, SIZE_T buflen, __sanitizer_group **result) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, getgrnam_r, name, grp, buf, buflen, result);
-  COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
+  COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
@@ -2289,7 +2289,7 @@
         ctx, pglob->gl_pathv, (pglob->gl_pathc + 1) * sizeof(*pglob->gl_pathv));
   for (SIZE_T i = 0; i < pglob->gl_pathc; ++i) {
     char *p = pglob->gl_pathv[i];
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p, REAL(strlen)(p) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p, internal_strlen(p) + 1);
   }
 }
 
@@ -2319,19 +2319,19 @@
 
 static void *wrapped_gl_opendir(const char *s) {
   COMMON_INTERCEPTOR_UNPOISON_PARAM(1);
-  COMMON_INTERCEPTOR_INITIALIZE_RANGE(s, REAL(strlen)(s) + 1);
+  COMMON_INTERCEPTOR_INITIALIZE_RANGE(s, internal_strlen(s) + 1);
   return pglob_copy->gl_opendir(s);
 }
 
 static int wrapped_gl_lstat(const char *s, void *st) {
   COMMON_INTERCEPTOR_UNPOISON_PARAM(2);
-  COMMON_INTERCEPTOR_INITIALIZE_RANGE(s, REAL(strlen)(s) + 1);
+  COMMON_INTERCEPTOR_INITIALIZE_RANGE(s, internal_strlen(s) + 1);
   return pglob_copy->gl_lstat(s, st);
 }
 
 static int wrapped_gl_stat(const char *s, void *st) {
   COMMON_INTERCEPTOR_UNPOISON_PARAM(2);
-  COMMON_INTERCEPTOR_INITIALIZE_RANGE(s, REAL(strlen)(s) + 1);
+  COMMON_INTERCEPTOR_INITIALIZE_RANGE(s, internal_strlen(s) + 1);
   return pglob_copy->gl_stat(s, st);
 }
 
@@ -2519,7 +2519,7 @@
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
   char *res = REAL(inet_ntop)(af, src, dst, size);
-  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
+  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, internal_strlen(res) + 1);
   return res;
 }
 INTERCEPTOR(int, inet_pton, int af, const char *src, void *dst) {
@@ -2548,7 +2548,7 @@
 INTERCEPTOR(int, inet_aton, const char *cp, void *dst) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, inet_aton, cp, dst);
-  if (cp) COMMON_INTERCEPTOR_READ_RANGE(ctx, cp, REAL(strlen)(cp) + 1);
+  if (cp) COMMON_INTERCEPTOR_READ_RANGE(ctx, cp, internal_strlen(cp) + 1);
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
@@ -2590,9 +2590,9 @@
             struct __sanitizer_addrinfo **out) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, getaddrinfo, node, service, hints, out);
-  if (node) COMMON_INTERCEPTOR_READ_RANGE(ctx, node, REAL(strlen)(node) + 1);
+  if (node) COMMON_INTERCEPTOR_READ_RANGE(ctx, node, internal_strlen(node) + 1);
   if (service)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, service, REAL(strlen)(service) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, service, internal_strlen(service) + 1);
   if (hints)
     COMMON_INTERCEPTOR_READ_RANGE(ctx, hints, sizeof(__sanitizer_addrinfo));
   // FIXME: under ASan the call below may write to freed memory and corrupt
@@ -2608,7 +2608,7 @@
         COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p->ai_addr, p->ai_addrlen);
       if (p->ai_canonname)
         COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p->ai_canonname,
-                                       REAL(strlen)(p->ai_canonname) + 1);
+                                       internal_strlen(p->ai_canonname) + 1);
       p = p->ai_next;
     }
   }
@@ -2634,9 +2634,9 @@
       REAL(getnameinfo)(sockaddr, salen, host, hostlen, serv, servlen, flags);
   if (res == 0) {
     if (host && hostlen)
-      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, host, REAL(strlen)(host) + 1);
+      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, host, internal_strlen(host) + 1);
     if (serv && servlen)
-      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, serv, REAL(strlen)(serv) + 1);
+      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, serv, internal_strlen(serv) + 1);
   }
   return res;
 }
@@ -2669,10 +2669,10 @@
 static void write_hostent(void *ctx, struct __sanitizer_hostent *h) {
   COMMON_INTERCEPTOR_WRITE_RANGE(ctx, h, sizeof(__sanitizer_hostent));
   if (h->h_name)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, h->h_name, REAL(strlen)(h->h_name) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, h->h_name, internal_strlen(h->h_name) + 1);
   char **p = h->h_aliases;
   while (*p) {
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *p, REAL(strlen)(*p) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *p, internal_strlen(*p) + 1);
     ++p;
   }
   COMMON_INTERCEPTOR_WRITE_RANGE(
@@ -3196,7 +3196,7 @@
 INTERCEPTOR(__sanitizer_dirent *, opendir, const char *path) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, opendir, path);
-  COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+  COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   __sanitizer_dirent *res = REAL(opendir)(path);
   if (res)
     COMMON_INTERCEPTOR_DIR_ACQUIRE(ctx, path);
@@ -3351,10 +3351,10 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, setlocale, category, locale);
   if (locale)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, locale, REAL(strlen)(locale) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, locale, internal_strlen(locale) + 1);
   char *res = REAL(setlocale)(category, locale);
   if (res) {
-    COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, REAL(strlen)(res) + 1);
+    COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, internal_strlen(res) + 1);
     unpoison_ctype_arrays(ctx);
   }
   return res;
@@ -3373,7 +3373,7 @@
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
   char *res = REAL(getcwd)(buf, size);
-  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
+  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, internal_strlen(res) + 1);
   return res;
 }
 #define INIT_GETCWD COMMON_INTERCEPT_FUNCTION(getcwd);
@@ -3389,7 +3389,7 @@
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
   char *res = REAL(get_current_dir_name)(fake);
-  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
+  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, internal_strlen(res) + 1);
   return res;
 }
 
@@ -3663,9 +3663,9 @@
 INTERCEPTOR(char *, realpath, const char *path, char *resolved_path) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, realpath, path, resolved_path);
-  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   char *res = REAL(realpath)(path, resolved_path);
-  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
+  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, internal_strlen(res) + 1);
   return res;
 }
 #define INIT_REALPATH COMMON_INTERCEPT_FUNCTION_GLIBC_VER_MIN(realpath, "GLIBC_2.3");
@@ -3677,9 +3677,9 @@
 INTERCEPTOR(char *, canonicalize_file_name, const char *path) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, canonicalize_file_name, path);
-  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   char *res = REAL(canonicalize_file_name)(path);
-  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
+  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, internal_strlen(res) + 1);
   return res;
 }
 #define INIT_CANONICALIZE_FILE_NAME \
@@ -3740,7 +3740,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, strerror, errnum);
   COMMON_INTERCEPTOR_STRERROR();
   char *res = REAL(strerror)(errnum);
-  if (res) COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, REAL(strlen)(res) + 1);
+  if (res) COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, internal_strlen(res) + 1);
   return res;
 }
 #define INIT_STRERROR COMMON_INTERCEPT_FUNCTION(strerror);
@@ -3782,9 +3782,9 @@
   // https://github.com/google/sanitizers/issues/321.
   char *res = REAL(strerror_r)(errnum, buf, buflen);
   if (res == buf)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, internal_strlen(res) + 1);
   else
-    COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, REAL(strlen)(res) + 1);
+    COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, internal_strlen(res) + 1);
   return res;
 }
 #endif //(_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !_GNU_SOURCE ||
@@ -3804,7 +3804,7 @@
   int res = REAL(__xpg_strerror_r)(errnum, buf, buflen);
   // This version always returns a null-terminated string.
   if (buf && buflen)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, REAL(strlen)(buf) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, internal_strlen(buf) + 1);
   return res;
 }
 #define INIT_XPG_STRERROR_R COMMON_INTERCEPT_FUNCTION(__xpg_strerror_r);
@@ -3840,7 +3840,7 @@
             scandir_filter_f filter, scandir_compar_f compar) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, scandir, dirp, namelist, filter, compar);
-  if (dirp) COMMON_INTERCEPTOR_READ_RANGE(ctx, dirp, REAL(strlen)(dirp) + 1);
+  if (dirp) COMMON_INTERCEPTOR_READ_RANGE(ctx, dirp, internal_strlen(dirp) + 1);
   scandir_filter = filter;
   scandir_compar = compar;
   // FIXME: under ASan the call below may write to freed memory and corrupt
@@ -3893,7 +3893,7 @@
             scandir64_filter_f filter, scandir64_compar_f compar) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, scandir64, dirp, namelist, filter, compar);
-  if (dirp) COMMON_INTERCEPTOR_READ_RANGE(ctx, dirp, REAL(strlen)(dirp) + 1);
+  if (dirp) COMMON_INTERCEPTOR_READ_RANGE(ctx, dirp, internal_strlen(dirp) + 1);
   scandir64_filter = filter;
   scandir64_compar = compar;
   // FIXME: under ASan the call below may write to freed memory and corrupt
@@ -3989,7 +3989,7 @@
 INTERCEPTOR(int, wordexp, char *s, __sanitizer_wordexp_t *p, int flags) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, wordexp, s, p, flags);
-  if (s) COMMON_INTERCEPTOR_READ_RANGE(ctx, s, REAL(strlen)(s) + 1);
+  if (s) COMMON_INTERCEPTOR_READ_RANGE(ctx, s, internal_strlen(s) + 1);
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
@@ -4001,7 +4001,7 @@
                                      sizeof(*p->we_wordv) * p->we_wordc);
     for (uptr i = 0; i < p->we_wordc; ++i) {
       char *w = p->we_wordv[i];
-      if (w) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, w, REAL(strlen)(w) + 1);
+      if (w) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, w, internal_strlen(w) + 1);
     }
   }
   return res;
@@ -4325,16 +4325,16 @@
   COMMON_INTERCEPTOR_WRITE_RANGE(ctx, mnt, sizeof(*mnt));
   if (mnt->mnt_fsname)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, mnt->mnt_fsname,
-                                   REAL(strlen)(mnt->mnt_fsname) + 1);
+                                   internal_strlen(mnt->mnt_fsname) + 1);
   if (mnt->mnt_dir)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, mnt->mnt_dir,
-                                   REAL(strlen)(mnt->mnt_dir) + 1);
+                                   internal_strlen(mnt->mnt_dir) + 1);
   if (mnt->mnt_type)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, mnt->mnt_type,
-                                   REAL(strlen)(mnt->mnt_type) + 1);
+                                   internal_strlen(mnt->mnt_type) + 1);
   if (mnt->mnt_opts)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, mnt->mnt_opts,
-                                   REAL(strlen)(mnt->mnt_opts) + 1);
+                                   internal_strlen(mnt->mnt_opts) + 1);
 }
 #endif
 
@@ -4369,7 +4369,7 @@
 INTERCEPTOR(int, statfs, char *path, void *buf) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, statfs, path, buf);
-  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
@@ -4398,7 +4398,7 @@
 INTERCEPTOR(int, statfs64, char *path, void *buf) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, statfs64, path, buf);
-  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
@@ -4427,7 +4427,7 @@
 INTERCEPTOR(int, statvfs, char *path, void *buf) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, statvfs, path, buf);
-  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
@@ -4461,7 +4461,7 @@
 INTERCEPTOR(int, statvfs64, char *path, void *buf) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, statvfs64, path, buf);
-  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
@@ -4490,7 +4490,7 @@
 INTERCEPTOR(int, initgroups, char *user, u32 group) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, initgroups, user, group);
-  if (user) COMMON_INTERCEPTOR_READ_RANGE(ctx, user, REAL(strlen)(user) + 1);
+  if (user) COMMON_INTERCEPTOR_READ_RANGE(ctx, user, internal_strlen(user) + 1);
   int res = REAL(initgroups)(user, group);
   return res;
 }
@@ -4505,13 +4505,13 @@
   COMMON_INTERCEPTOR_ENTER(ctx, ether_ntoa, addr);
   if (addr) COMMON_INTERCEPTOR_READ_RANGE(ctx, addr, sizeof(*addr));
   char *res = REAL(ether_ntoa)(addr);
-  if (res) COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, REAL(strlen)(res) + 1);
+  if (res) COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, internal_strlen(res) + 1);
   return res;
 }
 INTERCEPTOR(__sanitizer_ether_addr *, ether_aton, char *buf) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, ether_aton, buf);
-  if (buf) COMMON_INTERCEPTOR_READ_RANGE(ctx, buf, REAL(strlen)(buf) + 1);
+  if (buf) COMMON_INTERCEPTOR_READ_RANGE(ctx, buf, internal_strlen(buf) + 1);
   __sanitizer_ether_addr *res = REAL(ether_aton)(buf);
   if (res) COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, sizeof(*res));
   return res;
@@ -4533,14 +4533,14 @@
   // https://github.com/google/sanitizers/issues/321.
   int res = REAL(ether_ntohost)(hostname, addr);
   if (!res && hostname)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, hostname, REAL(strlen)(hostname) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, hostname, internal_strlen(hostname) + 1);
   return res;
 }
 INTERCEPTOR(int, ether_hostton, char *hostname, __sanitizer_ether_addr *addr) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, ether_hostton, hostname, addr);
   if (hostname)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, hostname, REAL(strlen)(hostname) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, hostname, internal_strlen(hostname) + 1);
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
@@ -4552,7 +4552,7 @@
             char *hostname) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, ether_line, line, addr, hostname);
-  if (line) COMMON_INTERCEPTOR_READ_RANGE(ctx, line, REAL(strlen)(line) + 1);
+  if (line) COMMON_INTERCEPTOR_READ_RANGE(ctx, line, internal_strlen(line) + 1);
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
@@ -4560,7 +4560,7 @@
   if (!res) {
     if (addr) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, addr, sizeof(*addr));
     if (hostname)
-      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, hostname, REAL(strlen)(hostname) + 1);
+      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, hostname, internal_strlen(hostname) + 1);
   }
   return res;
 }
@@ -4581,14 +4581,14 @@
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
   char *res = REAL(ether_ntoa_r)(addr, buf);
-  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
+  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, internal_strlen(res) + 1);
   return res;
 }
 INTERCEPTOR(__sanitizer_ether_addr *, ether_aton_r, char *buf,
             __sanitizer_ether_addr *addr) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, ether_aton_r, buf, addr);
-  if (buf) COMMON_INTERCEPTOR_READ_RANGE(ctx, buf, REAL(strlen)(buf) + 1);
+  if (buf) COMMON_INTERCEPTOR_READ_RANGE(ctx, buf, internal_strlen(buf) + 1);
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
@@ -4854,9 +4854,9 @@
       // FIXME: under ASan the call below may write to freed memory and corrupt
       // its metadata. See
       // https://github.com/google/sanitizers/issues/321.
-      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, s, REAL(strlen)(s) + 1);
+      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, s, internal_strlen(s) + 1);
     else
-      COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, REAL(strlen)(res) + 1);
+      COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, internal_strlen(res) + 1);
   }
   return res;
 }
@@ -4873,7 +4873,7 @@
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
   char *res = REAL(tmpnam_r)(s);
-  if (res && s) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, s, REAL(strlen)(s) + 1);
+  if (res && s) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, s, internal_strlen(s) + 1);
   return res;
 }
 #define INIT_TMPNAM_R COMMON_INTERCEPT_FUNCTION(tmpnam_r);
@@ -4887,7 +4887,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, ptsname, fd);
   char *res = REAL(ptsname)(fd);
   if (res != nullptr)
-    COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, REAL(strlen)(res) + 1);
+    COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, internal_strlen(res) + 1);
   return res;
 }
 #define INIT_PTSNAME COMMON_INTERCEPT_FUNCTION(ptsname);
@@ -4901,7 +4901,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, ptsname_r, fd, name, namesize);
   int res = REAL(ptsname_r)(fd, name, namesize);
   if (res == 0)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, name, REAL(strlen)(name) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, name, internal_strlen(name) + 1);
   return res;
 }
 #define INIT_PTSNAME_R COMMON_INTERCEPT_FUNCTION(ptsname_r);
@@ -4915,7 +4915,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, ttyname, fd);
   char *res = REAL(ttyname)(fd);
   if (res != nullptr)
-    COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, REAL(strlen)(res) + 1);
+    COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, internal_strlen(res) + 1);
   return res;
 }
 #define INIT_TTYNAME COMMON_INTERCEPT_FUNCTION(ttyname);
@@ -4929,7 +4929,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, ttyname_r, fd, name, namesize);
   int res = REAL(ttyname_r)(fd, name, namesize);
   if (res == 0)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, name, REAL(strlen)(name) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, name, internal_strlen(name) + 1);
   return res;
 }
 #define INIT_TTYNAME_R COMMON_INTERCEPT_FUNCTION(ttyname_r);
@@ -4941,10 +4941,10 @@
 INTERCEPTOR(char *, tempnam, char *dir, char *pfx) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, tempnam, dir, pfx);
-  if (dir) COMMON_INTERCEPTOR_READ_RANGE(ctx, dir, REAL(strlen)(dir) + 1);
-  if (pfx) COMMON_INTERCEPTOR_READ_RANGE(ctx, pfx, REAL(strlen)(pfx) + 1);
+  if (dir) COMMON_INTERCEPTOR_READ_RANGE(ctx, dir, internal_strlen(dir) + 1);
+  if (pfx) COMMON_INTERCEPTOR_READ_RANGE(ctx, pfx, internal_strlen(pfx) + 1);
   char *res = REAL(tempnam)(dir, pfx);
-  if (res) COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, REAL(strlen)(res) + 1);
+  if (res) COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, internal_strlen(res) + 1);
   return res;
 }
 #define INIT_TEMPNAM COMMON_INTERCEPT_FUNCTION(tempnam);
@@ -5404,7 +5404,7 @@
 INTERCEPTOR(SSIZE_T, listxattr, const char *path, char *list, SIZE_T size) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, listxattr, path, list, size);
-  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
@@ -5417,7 +5417,7 @@
 INTERCEPTOR(SSIZE_T, llistxattr, const char *path, char *list, SIZE_T size) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, llistxattr, path, list, size);
-  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
@@ -5448,8 +5448,8 @@
             SIZE_T size) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, getxattr, path, name, value, size);
-  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
-  if (name) COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
+  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
+  if (name) COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
@@ -5461,8 +5461,8 @@
             SIZE_T size) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, lgetxattr, path, name, value, size);
-  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
-  if (name) COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
+  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
+  if (name) COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
@@ -5474,7 +5474,7 @@
             SIZE_T size) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, fgetxattr, fd, name, value, size);
-  if (name) COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
+  if (name) COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
@@ -5544,7 +5544,7 @@
       COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p, sizeof(__sanitizer_ifaddrs));
       if (p->ifa_name)
         COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p->ifa_name,
-                                       REAL(strlen)(p->ifa_name) + 1);
+                                       internal_strlen(p->ifa_name) + 1);
       if (p->ifa_addr)
         COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p->ifa_addr, struct_sockaddr_sz);
       if (p->ifa_netmask)
@@ -5574,14 +5574,14 @@
   // https://github.com/google/sanitizers/issues/321.
   char *res = REAL(if_indextoname)(ifindex, ifname);
   if (res && ifname)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ifname, REAL(strlen)(ifname) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ifname, internal_strlen(ifname) + 1);
   return res;
 }
 INTERCEPTOR(unsigned int, if_nametoindex, const char* ifname) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, if_nametoindex, ifname);
   if (ifname)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, ifname, REAL(strlen)(ifname) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, ifname, internal_strlen(ifname) + 1);
   return REAL(if_nametoindex)(ifname);
 }
 #define INIT_IF_INDEXTONAME                  \
@@ -5839,7 +5839,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, xdr_string, xdrs, p, maxsize);
   if (p && xdrs->x_op == __sanitizer_XDR_ENCODE) {
     COMMON_INTERCEPTOR_READ_RANGE(ctx, p, sizeof(*p));
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, *p, REAL(strlen)(*p) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, *p, internal_strlen(*p) + 1);
   }
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
@@ -5848,7 +5848,7 @@
   if (p && xdrs->x_op == __sanitizer_XDR_DECODE) {
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p, sizeof(*p));
     if (res && *p)
-      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *p, REAL(strlen)(*p) + 1);
+      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *p, internal_strlen(*p) + 1);
   }
   return res;
 }
@@ -6059,8 +6059,8 @@
 INTERCEPTOR(__sanitizer_FILE *, fopen, const char *path, const char *mode) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, fopen, path, mode);
-  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
-  COMMON_INTERCEPTOR_READ_RANGE(ctx, mode, REAL(strlen)(mode) + 1);
+  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
+  COMMON_INTERCEPTOR_READ_RANGE(ctx, mode, internal_strlen(mode) + 1);
   __sanitizer_FILE *res = REAL(fopen)(path, mode);
   COMMON_INTERCEPTOR_FILE_OPEN(ctx, res, path);
   if (res) unpoison_file(res);
@@ -6069,7 +6069,7 @@
 INTERCEPTOR(__sanitizer_FILE *, fdopen, int fd, const char *mode) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, fdopen, fd, mode);
-  COMMON_INTERCEPTOR_READ_RANGE(ctx, mode, REAL(strlen)(mode) + 1);
+  COMMON_INTERCEPTOR_READ_RANGE(ctx, mode, internal_strlen(mode) + 1);
   __sanitizer_FILE *res = REAL(fdopen)(fd, mode);
   if (res) unpoison_file(res);
   return res;
@@ -6078,8 +6078,8 @@
             __sanitizer_FILE *fp) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, freopen, path, mode, fp);
-  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
-  COMMON_INTERCEPTOR_READ_RANGE(ctx, mode, REAL(strlen)(mode) + 1);
+  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
+  COMMON_INTERCEPTOR_READ_RANGE(ctx, mode, internal_strlen(mode) + 1);
   COMMON_INTERCEPTOR_FILE_CLOSE(ctx, fp);
   __sanitizer_FILE *res = REAL(freopen)(path, mode, fp);
   COMMON_INTERCEPTOR_FILE_OPEN(ctx, res, path);
@@ -6103,7 +6103,7 @@
   va_end(ap);
   COMMON_INTERCEPTOR_ENTER(ctx, flopen, path, flags, mode);
   if (path) {
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   }
   return REAL(flopen)(path, flags, mode);
 }
@@ -6116,7 +6116,7 @@
   va_end(ap);
   COMMON_INTERCEPTOR_ENTER(ctx, flopen, path, flags, mode);
   if (path) {
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   }
   return REAL(flopenat)(dirfd, path, flags, mode);
 }
@@ -6132,8 +6132,8 @@
 INTERCEPTOR(__sanitizer_FILE *, fopen64, const char *path, const char *mode) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, fopen64, path, mode);
-  COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
-  COMMON_INTERCEPTOR_READ_RANGE(ctx, mode, REAL(strlen)(mode) + 1);
+  COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
+  COMMON_INTERCEPTOR_READ_RANGE(ctx, mode, internal_strlen(mode) + 1);
   __sanitizer_FILE *res = REAL(fopen64)(path, mode);
   COMMON_INTERCEPTOR_FILE_OPEN(ctx, res, path);
   if (res) unpoison_file(res);
@@ -6143,8 +6143,8 @@
             __sanitizer_FILE *fp) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, freopen64, path, mode, fp);
-  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
-  COMMON_INTERCEPTOR_READ_RANGE(ctx, mode, REAL(strlen)(mode) + 1);
+  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
+  COMMON_INTERCEPTOR_READ_RANGE(ctx, mode, internal_strlen(mode) + 1);
   COMMON_INTERCEPTOR_FILE_CLOSE(ctx, fp);
   __sanitizer_FILE *res = REAL(freopen64)(path, mode, fp);
   COMMON_INTERCEPTOR_FILE_OPEN(ctx, res, path);
@@ -6322,9 +6322,9 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, getpass, prompt);
   if (prompt)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, prompt, REAL(strlen)(prompt)+1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, prompt, internal_strlen(prompt)+1);
   char *res = REAL(getpass)(prompt);
-  if (res) COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, REAL(strlen)(res)+1);
+  if (res) COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, internal_strlen(res)+1);
   return res;
 }
 
@@ -6536,7 +6536,7 @@
   u32 mode = va_arg(ap, u32);
   u32 value = va_arg(ap, u32);
   COMMON_INTERCEPTOR_ENTER(ctx, sem_open, name, oflag, mode, value);
-  COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
+  COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
   __sanitizer_sem_t *s = REAL(sem_open)(name, oflag, mode, value);
   if (s)
     COMMON_INTERCEPTOR_INITIALIZE_RANGE(s, sizeof(*s));
@@ -6547,7 +6547,7 @@
 INTERCEPTOR(int, sem_unlink, const char *name) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, sem_unlink, name);
-  COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
+  COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
   return REAL(sem_unlink)(name);
 }
 
@@ -6646,7 +6646,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, ctermid, s);
   char *res = REAL(ctermid)(s);
   if (res) {
-    COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, REAL(strlen)(res) + 1);
+    COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, internal_strlen(res) + 1);
   }
   return res;
 }
@@ -6661,7 +6661,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, ctermid_r, s);
   char *res = REAL(ctermid_r)(s);
   if (res) {
-    COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, REAL(strlen)(res) + 1);
+    COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, internal_strlen(res) + 1);
   }
   return res;
 }
@@ -6998,8 +6998,8 @@
 INTERCEPTOR(wchar_t *, wcscat, wchar_t *dst, const wchar_t *src) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, wcscat, dst, src);
-  SIZE_T src_size = REAL(wcslen)(src);
-  SIZE_T dst_size = REAL(wcslen)(dst);
+  SIZE_T src_size = internal_wcslen(src);
+  SIZE_T dst_size = internal_wcslen(dst);
   COMMON_INTERCEPTOR_READ_RANGE(ctx, src, (src_size + 1) * sizeof(wchar_t));
   COMMON_INTERCEPTOR_READ_RANGE(ctx, dst, (dst_size + 1) * sizeof(wchar_t));
   COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst + dst_size,
@@ -7010,8 +7010,8 @@
 INTERCEPTOR(wchar_t *, wcsncat, wchar_t *dst, const wchar_t *src, SIZE_T n) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, wcsncat, dst, src, n);
-  SIZE_T src_size = REAL(wcsnlen)(src, n);
-  SIZE_T dst_size = REAL(wcslen)(dst);
+  SIZE_T src_size = internal_wcsnlen(src, n);
+  SIZE_T dst_size = internal_wcslen(dst);
   COMMON_INTERCEPTOR_READ_RANGE(ctx, src,
                                 Min(src_size + 1, n) * sizeof(wchar_t));
   COMMON_INTERCEPTOR_READ_RANGE(ctx, dst, (dst_size + 1) * sizeof(wchar_t));
@@ -7030,7 +7030,7 @@
 INTERCEPTOR(wchar_t *, wcsdup, wchar_t *s) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, wcsdup, s);
-  SIZE_T len = REAL(wcslen)(s);
+  SIZE_T len = internal_wcslen(s);
   COMMON_INTERCEPTOR_READ_RANGE(ctx, s, sizeof(wchar_t) * (len + 1));
   wchar_t *result = REAL(wcsdup)(s);
   if (result)
@@ -7044,7 +7044,7 @@
 #endif
 
 #if SANITIZER_INTERCEPT_STRXFRM
-static SIZE_T RealStrLen(const char *str) { return REAL(strlen)(str); }
+static SIZE_T RealStrLen(const char *str) { return internal_strlen(str); }
 
 static SIZE_T RealStrLen(const wchar_t *str) { return REAL(wcslen)(str); }
 
@@ -7120,7 +7120,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, acct, file);
   if (file)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, file, REAL(strlen)(file) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, file, internal_strlen(file) + 1);
   return REAL(acct)(file);
 }
 #define INIT_ACCT COMMON_INTERCEPT_FUNCTION(acct)
@@ -7135,7 +7135,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, user_from_uid, uid, nouser);
   user = REAL(user_from_uid)(uid, nouser);
   if (user)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, user, REAL(strlen)(user) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, user, internal_strlen(user) + 1);
   return user;
 }
 #define INIT_USER_FROM_UID COMMON_INTERCEPT_FUNCTION(user_from_uid)
@@ -7149,7 +7149,7 @@
   int res;
   COMMON_INTERCEPTOR_ENTER(ctx, uid_from_user, name, uid);
   if (name)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
   res = REAL(uid_from_user)(name, uid);
   if (uid)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, uid, sizeof(*uid));
@@ -7167,7 +7167,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, group_from_gid, gid, nogroup);
   group = REAL(group_from_gid)(gid, nogroup);
   if (group)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, group, REAL(strlen)(group) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, group, internal_strlen(group) + 1);
   return group;
 }
 #define INIT_GROUP_FROM_GID COMMON_INTERCEPT_FUNCTION(group_from_gid)
@@ -7181,7 +7181,7 @@
   int res;
   COMMON_INTERCEPTOR_ENTER(ctx, gid_from_group, group, gid);
   if (group)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, group, REAL(strlen)(group) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, group, internal_strlen(group) + 1);
   res = REAL(gid_from_group)(group, gid);
   if (gid)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, gid, sizeof(*gid));
@@ -7197,7 +7197,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, access, path, mode);
   if (path)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   return REAL(access)(path, mode);
 }
 #define INIT_ACCESS COMMON_INTERCEPT_FUNCTION(access)
@@ -7210,7 +7210,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, faccessat, fd, path, mode, flags);
   if (path)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   return REAL(faccessat)(fd, path, mode, flags);
 }
 #define INIT_FACCESSAT COMMON_INTERCEPT_FUNCTION(faccessat)
@@ -7225,7 +7225,7 @@
   int res;
   COMMON_INTERCEPTOR_ENTER(ctx, getgrouplist, name, basegid, groups, ngroups);
   if (name)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
   if (ngroups)
     COMMON_INTERCEPTOR_READ_RANGE(ctx, ngroups, sizeof(*ngroups));
   res = REAL(getgrouplist)(name, basegid, groups, ngroups);
@@ -7249,7 +7249,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, getgroupmembership, name, basegid, groups,
                            maxgrp, ngroups);
   if (name)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
   res = REAL(getgroupmembership)(name, basegid, groups, maxgrp, ngroups);
   if (!res && groups && ngroups) {
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, groups, sizeof(*groups) * (*ngroups));
@@ -7267,7 +7267,7 @@
 INTERCEPTOR(SSIZE_T, readlink, const char *path, char *buf, SIZE_T bufsiz) {
   void* ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, readlink, path, buf, bufsiz);
-  COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+  COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   SSIZE_T res = REAL(readlink)(path, buf, bufsiz);
   if (res > 0)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, res);
@@ -7284,7 +7284,7 @@
             SIZE_T bufsiz) {
   void* ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, readlinkat, dirfd, path, buf, bufsiz);
-  COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+  COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   SSIZE_T res = REAL(readlinkat)(dirfd, path, buf, bufsiz);
   if (res > 0)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, res);
@@ -7302,7 +7302,7 @@
   void* ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, name_to_handle_at, dirfd, pathname, handle,
                            mount_id, flags);
-  COMMON_INTERCEPTOR_READ_RANGE(ctx, pathname, REAL(strlen)(pathname) + 1);
+  COMMON_INTERCEPTOR_READ_RANGE(ctx, pathname, internal_strlen(pathname) + 1);
 
   __sanitizer_file_handle *sanitizer_handle =
       reinterpret_cast<__sanitizer_file_handle*>(handle);
@@ -7366,7 +7366,7 @@
         ctx, src, Min(internal_strnlen(src, size), size - 1) + 1);
   }
   res = REAL(strlcpy)(dst, src, size);
-  COMMON_INTERCEPTOR_COPY_STRING(ctx, dst, src, REAL(strlen)(dst) + 1);
+  COMMON_INTERCEPTOR_COPY_STRING(ctx, dst, src, internal_strlen(dst) + 1);
   return res;
 }
 
@@ -7441,7 +7441,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, devname, dev, type);
   name = REAL(devname)(dev, type);
   if (name)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, name, REAL(strlen)(name) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, name, internal_strlen(name) + 1);
   return name;
 }
 #define INIT_DEVNAME COMMON_INTERCEPT_FUNCTION(devname);
@@ -7463,7 +7463,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, devname_r, dev, type, path, len);
   DEVNAME_R_RETTYPE res = REAL(devname_r)(dev, type, path, len);
   if (DEVNAME_R_SUCCESS(res))
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, path, REAL(strlen)(path) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, path, internal_strlen(path) + 1);
   return res;
 }
 #define INIT_DEVNAME_R COMMON_INTERCEPT_FUNCTION(devname_r);
@@ -7493,7 +7493,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, strmode, mode, bp);
   REAL(strmode)(mode, bp);
   if (bp)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, bp, REAL(strlen)(bp) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, bp, internal_strlen(bp) + 1);
 }
 #define INIT_STRMODE COMMON_INTERCEPT_FUNCTION(strmode)
 #else
@@ -7513,7 +7513,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, getttynam, name);
   if (name)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
   struct __sanitizer_ttyent *ttyent = REAL(getttynam)(name);
   if (ttyent)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ttyent, struct_ttyent_sz);
@@ -7523,7 +7523,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, setttyentpath, path);
   if (path)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   return REAL(setttyentpath)(path);
 }
 #define INIT_TTYENT \
@@ -7538,12 +7538,12 @@
 static void write_protoent(void *ctx, struct __sanitizer_protoent *p) {
   COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p, sizeof(*p));
 
-  COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p->p_name, REAL(strlen)(p->p_name) + 1);
+  COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p->p_name, internal_strlen(p->p_name) + 1);
 
   SIZE_T pp_size = 1; // One handles the trailing \0
 
   for (char **pp = p->p_aliases; *pp; ++pp, ++pp_size)
-      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *pp, REAL(strlen)(*pp) + 1);
+      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *pp, internal_strlen(*pp) + 1);
 
   COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p->p_aliases,
                                   pp_size * sizeof(char **));
@@ -7562,7 +7562,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, getprotobyname, name);
   if (name)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
   struct __sanitizer_protoent *p = REAL(getprotobyname)(name);
   if (p)
     write_protoent(ctx, p);
@@ -7606,7 +7606,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, getprotobyname_r, name, result_buf, buf,
                            buflen, result);
   if (name)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
   int res = REAL(getprotobyname_r)(name, result_buf, buf, buflen, result);
 
   COMMON_INTERCEPTOR_WRITE_RANGE(ctx, result, sizeof *result);
@@ -7645,12 +7645,12 @@
   if (n) {
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, n, sizeof(*n));
 
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, n->n_name, REAL(strlen)(n->n_name) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, n->n_name, internal_strlen(n->n_name) + 1);
 
     SIZE_T nn_size = 1; // One handles the trailing \0
 
     for (char **nn = n->n_aliases; *nn; ++nn, ++nn_size)
-      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *nn, REAL(strlen)(*nn) + 1);
+      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *nn, internal_strlen(*nn) + 1);
 
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, n->n_aliases,
                                    nn_size * sizeof(char **));
@@ -7662,17 +7662,17 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, getnetbyname, name);
   if (name)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
   struct __sanitizer_netent *n = REAL(getnetbyname)(name);
   if (n) {
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, n, sizeof(*n));
 
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, n->n_name, REAL(strlen)(n->n_name) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, n->n_name, internal_strlen(n->n_name) + 1);
 
     SIZE_T nn_size = 1; // One handles the trailing \0
 
     for (char **nn = n->n_aliases; *nn; ++nn, ++nn_size)
-      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *nn, REAL(strlen)(*nn) + 1);
+      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *nn, internal_strlen(*nn) + 1);
 
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, n->n_aliases,
                                    nn_size * sizeof(char **));
@@ -7687,12 +7687,12 @@
   if (n) {
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, n, sizeof(*n));
 
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, n->n_name, REAL(strlen)(n->n_name) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, n->n_name, internal_strlen(n->n_name) + 1);
 
     SIZE_T nn_size = 1; // One handles the trailing \0
 
     for (char **nn = n->n_aliases; *nn; ++nn, ++nn_size)
-      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *nn, REAL(strlen)(*nn) + 1);
+      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *nn, internal_strlen(*nn) + 1);
 
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, n->n_aliases,
                                    nn_size * sizeof(char **));
@@ -7813,7 +7813,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, regcomp, preg, pattern, cflags);
   if (pattern)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, pattern, REAL(strlen)(pattern) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, pattern, internal_strlen(pattern) + 1);
   int res = REAL(regcomp)(preg, pattern, cflags);
   if (!res)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, preg, struct_regex_sz);
@@ -7826,7 +7826,7 @@
   if (preg)
     COMMON_INTERCEPTOR_READ_RANGE(ctx, preg, struct_regex_sz);
   if (string)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, string, REAL(strlen)(string) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, string, internal_strlen(string) + 1);
   int res = REAL(regexec)(preg, string, nmatch, pmatch, eflags);
   if (!res && pmatch)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pmatch, nmatch * struct_regmatch_sz);
@@ -7840,7 +7840,7 @@
     COMMON_INTERCEPTOR_READ_RANGE(ctx, preg, struct_regex_sz);
   SIZE_T res = REAL(regerror)(errcode, preg, errbuf, errbuf_size);
   if (errbuf)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, errbuf, REAL(strlen)(errbuf) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, errbuf, internal_strlen(errbuf) + 1);
   return res;
 }
 INTERCEPTOR(void, regfree, const void *preg) {
@@ -7865,15 +7865,15 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, regnsub, buf, bufsiz, sub, rm, str);
   if (sub)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, sub, REAL(strlen)(sub) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, sub, internal_strlen(sub) + 1);
   // The implementation demands and hardcodes 10 elements
   if (rm)
     COMMON_INTERCEPTOR_READ_RANGE(ctx, rm, 10 * struct_regmatch_sz);
   if (str)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, str, REAL(strlen)(str) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, str, internal_strlen(str) + 1);
   SSIZE_T res = REAL(regnsub)(buf, bufsiz, sub, rm, str);
   if (res > 0 && buf)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, REAL(strlen)(buf) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, internal_strlen(buf) + 1);
   return res;
 }
 INTERCEPTOR(SSIZE_T, regasub, char **buf, const char *sub,
@@ -7881,16 +7881,16 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, regasub, buf, sub, rm, sstr);
   if (sub)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, sub, REAL(strlen)(sub) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, sub, internal_strlen(sub) + 1);
   // Hardcode 10 elements as this is hardcoded size
   if (rm)
     COMMON_INTERCEPTOR_READ_RANGE(ctx, rm, 10 * struct_regmatch_sz);
   if (sstr)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, sstr, REAL(strlen)(sstr) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, sstr, internal_strlen(sstr) + 1);
   SSIZE_T res = REAL(regasub)(buf, sub, rm, sstr);
   if (res > 0 && buf) {
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, sizeof(char *));
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *buf, REAL(strlen)(*buf) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *buf, internal_strlen(*buf) + 1);
   }
   return res;
 }
@@ -7912,7 +7912,7 @@
       COMMON_INTERCEPTOR_READ_RANGE(ctx, pa, sizeof(char **));
       if (!*pa)
         break;
-      COMMON_INTERCEPTOR_READ_RANGE(ctx, *pa, REAL(strlen)(*pa) + 1);
+      COMMON_INTERCEPTOR_READ_RANGE(ctx, *pa, internal_strlen(*pa) + 1);
     }
   }
   // TODO(kamil): handle compar callback
@@ -8004,7 +8004,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, sysctlbyname, sname, oldp, oldlenp, newp,
                            newlen);
   if (sname)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, sname, REAL(strlen)(sname) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, sname, internal_strlen(sname) + 1);
   if (oldlenp)
     COMMON_INTERCEPTOR_READ_RANGE(ctx, oldlenp, sizeof(*oldlenp));
   if (newp && newlen)
@@ -8025,7 +8025,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, sysctlnametomib, sname, name, namelenp);
   if (sname)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, sname, REAL(strlen)(sname) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, sname, internal_strlen(sname) + 1);
   if (namelenp)
     COMMON_INTERCEPTOR_READ_RANGE(ctx, namelenp, sizeof(*namelenp));
   int res = REAL(sysctlnametomib)(sname, name, namelenp);
@@ -8065,7 +8065,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, asysctlbyname, sname, len);
   if (sname)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, sname, REAL(strlen)(sname) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, sname, internal_strlen(sname) + 1);
   void *res = REAL(asysctlbyname)(sname, len);
   if (res && len) {
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, len, sizeof(*len));
@@ -8088,7 +8088,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, sysctlgetmibinfo, sname, name, namelenp, cname,
                            csz, rnode, v);
   if (sname)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, sname, REAL(strlen)(sname) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, sname, internal_strlen(sname) + 1);
   if (namelenp)
     COMMON_INTERCEPTOR_READ_RANGE(ctx, namelenp, sizeof(*namelenp));
   if (csz)
@@ -8122,7 +8122,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, nl_langinfo, item);
   char *ret = REAL(nl_langinfo)(item);
   if (ret)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ret, REAL(strlen)(ret) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ret, internal_strlen(ret) + 1);
   return ret;
 }
 #define INIT_NL_LANGINFO COMMON_INTERCEPT_FUNCTION(nl_langinfo)
@@ -8142,7 +8142,7 @@
       COMMON_INTERCEPTOR_READ_RANGE(ctx, ml, sizeof(*ml));
       if (ml->ml_filename)
         COMMON_INTERCEPTOR_READ_RANGE(ctx, ml->ml_filename,
-                                      REAL(strlen)(ml->ml_filename) + 1);
+                                      internal_strlen(ml->ml_filename) + 1);
       if (ml->ml_props)
         COMMON_INTERCEPTOR_READ_RANGE(ctx, ml->ml_props, ml->ml_propslen);
     }
@@ -8150,7 +8150,7 @@
   } else if (operation == modctl_unload) {
     if (argp) {
       const char *name = (const char *)argp;
-      COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
+      COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
     }
     ret = REAL(modctl)(operation, argp);
   } else if (operation == modctl_stat) {
@@ -8192,7 +8192,7 @@
   if (errstr) {
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, errstr, sizeof(const char *));
      if (*errstr)
-      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *errstr, REAL(strlen)(*errstr) + 1);
+      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *errstr, internal_strlen(*errstr) + 1);
   }
   return ret;
 }
@@ -8212,7 +8212,7 @@
     COMMON_INTERCEPTOR_READ_RANGE(ctx, delim, sizeof(delim[0]) * 3);
   char *ret = REAL(fparseln)(stream, len, lineno, delim, flags);
   if (ret) {
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ret, REAL(strlen)(ret) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ret, internal_strlen(ret) + 1);
     if (len)
       COMMON_INTERCEPTOR_WRITE_RANGE(ctx, len, sizeof(*len));
     if (lineno)
@@ -8229,7 +8229,7 @@
 INTERCEPTOR(int, statvfs1, const char *path, void *buf, int flags) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, statvfs1, path, buf, flags);
-  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   int res = REAL(statvfs1)(path, buf, flags);
   if (!res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, struct_statvfs_sz);
   return res;
@@ -8510,7 +8510,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, SHA1File, filename, buf);
   if (filename)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, REAL(strlen)(filename) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, internal_strlen(filename) + 1);
   char *ret = REAL(SHA1File)(filename, buf);
   if (ret)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ret, SHA1_return_length);
@@ -8521,7 +8521,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, SHA1FileChunk, filename, buf, offset, length);
   if (filename)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, REAL(strlen)(filename) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, internal_strlen(filename) + 1);
   char *ret = REAL(SHA1FileChunk)(filename, buf, offset, length);
   if (ret)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ret, SHA1_return_length);
@@ -8597,7 +8597,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, MD4File, filename, buf);
   if (filename)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, REAL(strlen)(filename) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, internal_strlen(filename) + 1);
   char *ret = REAL(MD4File)(filename, buf);
   if (ret)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ret, MD4_return_length);
@@ -8680,7 +8680,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, RMD160File, filename, buf);
   if (filename)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, REAL(strlen)(filename) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, internal_strlen(filename) + 1);
   char *ret = REAL(RMD160File)(filename, buf);
   if (ret)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ret, RMD160_return_length);
@@ -8691,7 +8691,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, RMD160FileChunk, filename, buf, offset, length);
   if (filename)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, REAL(strlen)(filename) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, internal_strlen(filename) + 1);
   char *ret = REAL(RMD160FileChunk)(filename, buf, offset, length);
   if (ret)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ret, RMD160_return_length);
@@ -8767,7 +8767,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, MD5File, filename, buf);
   if (filename)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, REAL(strlen)(filename) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, internal_strlen(filename) + 1);
   char *ret = REAL(MD5File)(filename, buf);
   if (ret)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ret, MD5_return_length);
@@ -8897,7 +8897,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, MD2File, filename, buf);
   if (filename)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, REAL(strlen)(filename) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, internal_strlen(filename) + 1);
   char *ret = REAL(MD2File)(filename, buf);
   if (ret)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ret, MD2_return_length);
@@ -8975,7 +8975,7 @@
     void *ctx; \
     COMMON_INTERCEPTOR_ENTER(ctx, SHA##LEN##_File, filename, buf); \
     if (filename) \
-      COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, REAL(strlen)(filename) + 1);\
+      COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, internal_strlen(filename) + 1);\
     char *ret = REAL(SHA##LEN##_File)(filename, buf); \
     if (ret) \
       COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ret, SHA##LEN##_return_length); \
@@ -8987,7 +8987,7 @@
     COMMON_INTERCEPTOR_ENTER(ctx, SHA##LEN##_FileChunk, filename, buf, offset, \
   length); \
     if (filename) \
-      COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, REAL(strlen)(filename) + 1);\
+      COMMON_INTERCEPTOR_READ_RANGE(ctx, filename, internal_strlen(filename) + 1);\
     char *ret = REAL(SHA##LEN##_FileChunk)(filename, buf, offset, length); \
     if (ret) \
       COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ret, SHA##LEN##_return_length); \
@@ -9051,7 +9051,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, strvis, dst, src, flag);
   if (src)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, REAL(strlen)(src) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, internal_strlen(src) + 1);
   int len = REAL(strvis)(dst, src, flag);
   if (dst)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst, len + 1);
@@ -9061,7 +9061,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, stravis, dst, src, flag);
   if (src)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, REAL(strlen)(src) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, internal_strlen(src) + 1);
   int len = REAL(stravis)(dst, src, flag);
   if (dst) {
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst, sizeof(char *));
@@ -9074,7 +9074,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, strnvis, dst, dlen, src, flag);
   if (src)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, REAL(strlen)(src) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, internal_strlen(src) + 1);
   int len = REAL(strnvis)(dst, dlen, src, flag);
   // The interface will be valid even if there is no space for NULL char
   if (dst && len > 0)
@@ -9124,7 +9124,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, svis, dst, c, flag, nextc, extra);
   if (extra)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, extra, REAL(strlen)(extra) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, extra, internal_strlen(extra) + 1);
   char *end = REAL(svis)(dst, c, flag, nextc, extra);
   if (dst && end)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst, end - dst + 1);
@@ -9135,7 +9135,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, snvis, dst, dlen, c, flag, nextc, extra);
   if (extra)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, extra, REAL(strlen)(extra) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, extra, internal_strlen(extra) + 1);
   char *end = REAL(snvis)(dst, dlen, c, flag, nextc, extra);
   if (dst && end)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst,
@@ -9147,9 +9147,9 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, strsvis, dst, src, flag, extra);
   if (src)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, REAL(strlen)(src) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, internal_strlen(src) + 1);
   if (extra)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, extra, REAL(strlen)(extra) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, extra, internal_strlen(extra) + 1);
   int len = REAL(strsvis)(dst, src, flag, extra);
   if (dst)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst, len + 1);
@@ -9160,9 +9160,9 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, strsnvis, dst, dlen, src, flag, extra);
   if (src)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, REAL(strlen)(src) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, internal_strlen(src) + 1);
   if (extra)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, extra, REAL(strlen)(extra) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, extra, internal_strlen(extra) + 1);
   int len = REAL(strsnvis)(dst, dlen, src, flag, extra);
   // The interface will be valid even if there is no space for NULL char
   if (dst && len >= 0)
@@ -9176,7 +9176,7 @@
   if (src)
     COMMON_INTERCEPTOR_READ_RANGE(ctx, src, len);
   if (extra)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, extra, REAL(strlen)(extra) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, extra, internal_strlen(extra) + 1);
   int ret = REAL(strsvisx)(dst, src, len, flag, extra);
   if (dst)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst, ret + 1);
@@ -9189,7 +9189,7 @@
   if (src)
     COMMON_INTERCEPTOR_READ_RANGE(ctx, src, len);
   if (extra)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, extra, REAL(strlen)(extra) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, extra, internal_strlen(extra) + 1);
   int ret = REAL(strsnvisx)(dst, dlen, src, len, flag, extra);
   if (dst && ret >= 0)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst, ret + 1);
@@ -9203,7 +9203,7 @@
   if (src)
     COMMON_INTERCEPTOR_READ_RANGE(ctx, src, len);
   if (extra)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, extra, REAL(strlen)(extra) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, extra, internal_strlen(extra) + 1);
   // FIXME: only need to be checked when "flag | VIS_NOLOCALE" doesn't hold
   // according to the implementation
   if (cerr_ptr)
@@ -9230,7 +9230,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, strunvis, dst, src);
   if (src)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, REAL(strlen)(src) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, internal_strlen(src) + 1);
   int ret = REAL(strunvis)(dst, src);
   if (ret != -1)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst, ret + 1);
@@ -9240,7 +9240,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, strnunvis, dst, dlen, src);
   if (src)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, REAL(strlen)(src) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, internal_strlen(src) + 1);
   int ret = REAL(strnunvis)(dst, dlen, src);
   if (ret != -1)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst, ret + 1);
@@ -9250,7 +9250,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, strunvisx, dst, src, flag);
   if (src)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, REAL(strlen)(src) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, internal_strlen(src) + 1);
   int ret = REAL(strunvisx)(dst, src, flag);
   if (ret != -1)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst, ret + 1);
@@ -9261,7 +9261,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, strnunvisx, dst, dlen, src, flag);
   if (src)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, REAL(strlen)(src) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, internal_strlen(src) + 1);
   int ret = REAL(strnunvisx)(dst, dlen, src, flag);
   if (ret != -1)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst, ret + 1);
@@ -9297,7 +9297,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, cdbr_open, path, flags);
   if (path)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   struct __sanitizer_cdbr *cdbr = REAL(cdbr_open)(path, flags);
   if (cdbr)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, cdbr, sizeof(*cdbr));
@@ -9489,7 +9489,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, getfsspec, spec);
   if (spec)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, spec, REAL(strlen)(spec) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, spec, internal_strlen(spec) + 1);
   void *ret = REAL(getfsspec)(spec);
   if (ret)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ret, struct_fstab_sz);
@@ -9500,7 +9500,7 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, getfsfile, file);
   if (file)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, file, REAL(strlen)(file) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, file, internal_strlen(file) + 1);
   void *ret = REAL(getfsfile)(file);
   if (ret)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ret, struct_fstab_sz);
@@ -9544,9 +9544,9 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, popen, command, type);
   if (command)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, command, REAL(strlen)(command) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, command, internal_strlen(command) + 1);
   if (type)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, type, REAL(strlen)(type) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, type, internal_strlen(type) + 1);
   __sanitizer_FILE *res = REAL(popen)(command, type);
   COMMON_INTERCEPTOR_FILE_OPEN(ctx, res, nullptr);
   if (res) unpoison_file(res);
@@ -9563,13 +9563,13 @@
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, popenve, path, argv, envp, type);
   if (path)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   if (argv) {
     for (char *const *pa = argv; ; ++pa) {
       COMMON_INTERCEPTOR_READ_RANGE(ctx, pa, sizeof(char **));
       if (!*pa)
         break;
-      COMMON_INTERCEPTOR_READ_RANGE(ctx, *pa, REAL(strlen)(*pa) + 1);
+      COMMON_INTERCEPTOR_READ_RANGE(ctx, *pa, internal_strlen(*pa) + 1);
     }
   }
   if (envp) {
@@ -9577,11 +9577,11 @@
       COMMON_INTERCEPTOR_READ_RANGE(ctx, pa, sizeof(char **));
       if (!*pa)
         break;
-      COMMON_INTERCEPTOR_READ_RANGE(ctx, *pa, REAL(strlen)(*pa) + 1);
+      COMMON_INTERCEPTOR_READ_RANGE(ctx, *pa, internal_strlen(*pa) + 1);
     }
   }
   if (type)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, type, REAL(strlen)(type) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, type, internal_strlen(type) + 1);
   __sanitizer_FILE *res = REAL(popenve)(path, argv, envp, type);
   COMMON_INTERCEPTOR_FILE_OPEN(ctx, res, nullptr);
   if (res) unpoison_file(res);
@@ -9777,7 +9777,7 @@
   COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd);
   char *name = REAL(fdevname)(fd);
   if (name) {
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, name, REAL(strlen)(name) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, name, internal_strlen(name) + 1);
     if (fd > 0)
       COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd);
   }
@@ -9790,7 +9790,7 @@
   COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd);
   char *name = REAL(fdevname_r)(fd, buf, len);
   if (name && buf && len > 0) {
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, REAL(strlen)(buf) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, internal_strlen(buf) + 1);
     if (fd > 0)
       COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd);
   }
@@ -9810,7 +9810,7 @@
   COMMON_INTERCEPTOR_ENTER(ctx, getusershell);
   char *res = REAL(getusershell)();
   if (res)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, internal_strlen(res) + 1);
   return res;
 }
 
@@ -9835,7 +9835,7 @@
   if (sl)
     COMMON_INTERCEPTOR_READ_RANGE(ctx, sl, __sanitizer::struct_StringList_sz);
   if (item)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, item, REAL(strlen)(item) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, item, internal_strlen(item) + 1);
   int res = REAL(sl_add)(sl, item);
   if (!res)
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, sl, __sanitizer::struct_StringList_sz);
@@ -9848,10 +9848,10 @@
   if (sl)
     COMMON_INTERCEPTOR_READ_RANGE(ctx, sl, __sanitizer::struct_StringList_sz);
   if (item)
-    COMMON_INTERCEPTOR_READ_RANGE(ctx, item, REAL(strlen)(item) + 1);
+    COMMON_INTERCEPTOR_READ_RANGE(ctx, item, internal_strlen(item) + 1);
   char *res = REAL(sl_find)(sl, item);
   if (res)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, internal_strlen(res) + 1);
   return res;
 }
 
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_netbsd_compat.inc b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_netbsd_compat.inc
--- a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_netbsd_compat.inc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_netbsd_compat.inc
@@ -33,7 +33,7 @@
 INTERCEPTOR(int, statvfs, char *path, void *buf) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, statvfs, path, buf);
-  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   // FIXME: under ASan the call below may write to freed memory and corrupt
   // its metadata. See
   // https://github.com/google/sanitizers/issues/321.
@@ -99,7 +99,7 @@
 INTERCEPTOR(int, statvfs1, const char *path, void *buf, int flags) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, statvfs1, path, buf, flags);
-  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
+  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
   int res = REAL(statvfs1)(path, buf, flags);
   if (!res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, struct_statvfs90_sz);
   return res;
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_libc.h b/compiler-rt/lib/sanitizer_common/sanitizer_libc.h
--- a/compiler-rt/lib/sanitizer_common/sanitizer_libc.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_libc.h
@@ -51,6 +51,8 @@
 s64 internal_simple_strtoll(const char *nptr, const char **endptr, int base);
 int internal_snprintf(char *buffer, uptr length, const char *format, ...)
     FORMAT(3, 4);
+uptr internal_wcslen(const wchar_t *s);
+uptr internal_wcsnlen(const wchar_t *s, uptr maxlen);
 
 // Return true if all bytes in [mem, mem+size) are zero.
 // Optimized for the case when the result is true.
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_libc.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_libc.cpp
--- a/compiler-rt/lib/sanitizer_common/sanitizer_libc.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_libc.cpp
@@ -258,6 +258,18 @@
   }
 }
 
+uptr internal_wcslen(const wchar_t *s) {
+  uptr i = 0;
+  while (s[i]) i++;
+  return i;
+}
+
+uptr internal_wcsnlen(const wchar_t *s, uptr maxlen) {
+  uptr i = 0;
+  while (i < maxlen && s[i]) i++;
+  return i;
+}
+
 bool mem_is_zero(const char *beg, uptr size) {
   CHECK_LE(size, 1ULL << FIRST_32_SECOND_64(30, 40));  // Sanity check.
   const char *end = beg + size;
diff --git a/compiler-rt/lib/sanitizer_common/tests/sanitizer_libc_test.cpp b/compiler-rt/lib/sanitizer_common/tests/sanitizer_libc_test.cpp
--- a/compiler-rt/lib/sanitizer_common/tests/sanitizer_libc_test.cpp
+++ b/compiler-rt/lib/sanitizer_common/tests/sanitizer_libc_test.cpp
@@ -279,6 +279,23 @@
   EXPECT_EQ(retval, (uptr)9);
 }
 
+TEST(SanitizerCommon, InternalWideStringFunctions) {
+  const wchar_t *emptystr = L"";
+  const wchar_t *samesizestr = L"1234567";
+  const wchar_t *shortstr = L"123";
+  const wchar_t *longerstr = L"123456789";
+
+  ASSERT_EQ(internal_wcslen(emptystr), 0ul);
+  ASSERT_EQ(internal_wcslen(samesizestr), 7ul);
+  ASSERT_EQ(internal_wcslen(shortstr), 3ul);
+  ASSERT_EQ(internal_wcslen(longerstr), 9ul);
+
+  ASSERT_EQ(internal_wcsnlen(emptystr, 7), 0ul);
+  ASSERT_EQ(internal_wcsnlen(samesizestr, 7), 7ul);
+  ASSERT_EQ(internal_wcsnlen(shortstr, 7), 3ul);
+  ASSERT_EQ(internal_wcsnlen(longerstr, 7), 7ul);
+}
+
 // FIXME: File manipulations are not yet supported on Windows
 #if SANITIZER_POSIX && !SANITIZER_MAC
 TEST(SanitizerCommon, InternalMmapWithOffset) {