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
@@ -1334,7 +1334,7 @@
     // Can not use COMMON_INTERCEPTOR_WRITE_RANGE here, because tm->tm_zone
     // can point to shared memory and tsan would report a data race.
     COMMON_INTERCEPTOR_INITIALIZE_RANGE(tm->tm_zone,
-                                        REAL(strlen(tm->tm_zone)) + 1);
+                                        internal_strlen(tm->tm_zone) + 1);
   }
 #endif
 }
@@ -4219,7 +4219,7 @@
   if (res && size) {
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, size * sizeof(*res));
     for (int i = 0; i < size; ++i)
-      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res[i], REAL(strlen(res[i])) + 1);
+      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res[i], internal_strlen(res[i])) + 1);
   }
   return res;
 }
@@ -7056,7 +7056,7 @@
 #endif
 
 #if SANITIZER_INTERCEPT_STRXFRM
-static SIZE_T RealStrLen(const char *str) { return internal_strlen(str); }
+static SIZE_T RealStrLen(const char *str) { return REAL(strlen)(str); }
 
 static SIZE_T RealStrLen(const wchar_t *str) { return REAL(wcslen)(str); }