Index: libcxx/src/new.cpp
===================================================================
--- libcxx/src/new.cpp
+++ libcxx/src/new.cpp
@@ -55,7 +55,10 @@
 
 #if !defined(__GLIBCXX__) &&                                                   \
     !defined(_LIBCPP_ABI_VCRUNTIME) &&      \
-    !defined(_LIBCPP_DISABLE_NEW_DELETE_DEFINITIONS)
+    !defined(_LIBCPP_DISABLE_NEW_DELETE_DEFINITIONS) && \
+    !__has_feature(address_sanitizer) && \
+    !__has_feature(hwaddress_sanitizer) && \
+    !__has_feature(thread_sanitizer)
 
 // Implement all new and delete operators as weak definitions
 // in this shared library, so that they can be overridden by programs
@@ -298,4 +301,4 @@
 }
 
 #endif // !_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
-#endif // !__GLIBCXX__ && !_LIBCPP_ABI_VCRUNTIME && !_LIBCPP_DISABLE_NEW_DELETE_DEFINITIONS
+#endif // !__GLIBCXX__ && !_LIBCPP_ABI_VCRUNTIME && !_LIBCPP_DISABLE_NEW_DELETE_DEFINITIONS && !address_sanitizer && !hwaddress_sanitizer && !thread_sanitizer
Index: libcxxabi/src/stdlib_new_delete.cpp
===================================================================
--- libcxxabi/src/stdlib_new_delete.cpp
+++ libcxxabi/src/stdlib_new_delete.cpp
@@ -17,6 +17,11 @@
 #error The _THROW_BAD_ALLOC, _NOEXCEPT, and _LIBCXXABI_WEAK libc++ macros must \
        already be defined by libc++.
 #endif
+
+#if !__has_feature(address_sanitizer) && \
+    !__has_feature(hwaddress_sanitizer) && \
+    !__has_feature(thread_sanitizer)
+
 // Implement all new and delete operators as weak definitions
 // in this shared library, so that they can be overridden by programs
 // that define non-weak copies of the functions.
@@ -259,4 +264,6 @@
     ::operator delete[](ptr, alignment);
 }
 
+#endif // !address_sanitizer && !hwaddress_sanitizer && !thread_sanitizer
+
 #endif // !_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION