1 files changed, 24 insertions, 0 deletions
diff --git a/py/misc.h b/py/misc.h
index 5c1cc2f7a..081163cad 100644
--- a/py/misc.h
+++ b/py/misc.h
@@ -43,6 +43,11 @@ typedef unsigned int uint;
 #ifndef __has_builtin
 #define __has_builtin(x) (0)
 #endif
+#ifndef __has_feature
+// This macro is supported by Clang and gcc>=14
+#define __has_feature(x) (0)
+#endif
+
 
 /** generic ops *************************************************/
 
@@ -538,4 +543,23 @@ inline static bool mp_sub_ll_overflow(long long int lhs, long long int rhs, long
 }
 #endif
 
+
+// Helper macros for detecting if sanitizers are enabled
+//
+// Use sparingly, not for masking issues reported by sanitizers!
+//
+// Can be detected automatically in Clang and gcc>=14, need to be
+// set manually otherwise.
+#ifndef MP_UBSAN
+#define MP_UBSAN __has_feature(undefined_behavior_sanitizer)
+#endif
+
+#ifndef MP_ASAN
+#define MP_ASAN __has_feature(address_sanitizer)
+#endif
+
+#ifndef MP_SANITIZER_BUILD
+#define MP_SANITIZER_BUILD (MP_UBSAN || MP_ASAN)
+#endif
+
 #endif // MICROPY_INCLUDED_PY_MISC_H