[Minor] Add support for address sanitizer

src/libutil/str_util.c

@@ -330,7 +330,7 @@ rspamd_gstring_icase_hash (gconstpointer key)
 #define HASZERO(x) ~(((((x) & ZEROMASK) + ZEROMASK) | (x)) | ZEROMASK)
 
 gsize
-rspamd_strlcpy (gchar *dst, const gchar *src, gsize siz)
+rspamd_strlcpy_fast (gchar *dst, const gchar *src, gsize siz)
 {
 	gchar *d = dst;
 	const gchar *s = src;
@@ -371,6 +371,30 @@ rspamd_strlcpy (gchar *dst, const gchar *src, gsize siz)
 	return (d - dst);
 }
 
+size_t
+rspamd_strlcpy_safe (gchar *dst, const gchar *src, gsize siz)
+{
+	const gchar *osrc = src;
+	gchar *d = dst;
+	gsize nleft = siz;
+
+	if (nleft != 0) {
+		while (--nleft != 0) {
+			if ((*d++ = *src++) == '\0') {
+				break;
+			}
+		}
+	}
+
+	if (nleft == 0) {
+		if (siz != 0) {
+			*d = '\0';
+		}
+	}
+
+	return (d - dst);
+}
+
 /*
  * Try to convert string of length to long
  */

src/libutil/str_util.h

@@ -74,7 +74,18 @@ gboolean rspamd_gstring_icase_equal (gconstpointer v, gconstpointer v2);
  * @param siz length of destination buffer
  * @return bytes copied
  */
-gsize rspamd_strlcpy (gchar *dst, const gchar *src, gsize siz);
+gsize rspamd_strlcpy_fast (gchar *dst, const gchar *src, gsize siz);
+gsize rspamd_strlcpy_safe (gchar *dst, const gchar *src, gsize siz);
+
+#if defined(__has_feature)
+#  if __has_feature(address_sanitizer)
+#    define rspamd_strlcpy rspamd_strlcpy_safe
+#  else
+#    define rspamd_strlcpy rspamd_strlcpy_fast
+#  endif
+#else
+#  define rspamd_strlcpy rspamd_strlcpy_fast
+#endif
 
 /*
  * Try to convert string of length to long