--- libmalloc/libmalloc-317.121.1/src/malloc_common.h
+++ libmalloc/libmalloc-425.100.7/src/malloc_common.h
@@ -40,4 +40,35 @@
 malloc_common_value_for_key_copy(const char *src, const char *key,
 		 char *bufp, size_t maxlen);
 
+__options_decl(malloc_zone_options_t, unsigned, {
+	MZ_NONE  = 0x0,
+	MZ_POSIX = 0x1,
+	MZ_C11   = 0x2,
+});
+
+static MALLOC_INLINE void
+malloc_set_errno_fast(malloc_zone_options_t mzo, int err)
+{
+	if (mzo & MZ_POSIX) {
+#if TARGET_OS_SIMULATOR
+		errno = err;
+#else
+		(*_pthread_errno_address_direct()) = err;
+#endif
+	}
+}
+
+MALLOC_NOEXPORT
+void
+find_zone_and_free(void *ptr, bool known_non_default);
+
+typedef enum {
+	MALLOC_ZERO_ON_FREE = 0, // this is the 0 case so most checks can be 0-tests
+	MALLOC_ZERO_NONE = 1,
+	MALLOC_ZERO_ON_ALLOC = 2,
+} malloc_zero_policy_t;
+
+MALLOC_NOEXPORT
+extern malloc_zero_policy_t malloc_zero_policy;
+
 #endif // __MALLOC_COMMON_H