Bug #27691897 UNDEFINED BEHAVIOR IN RESET_GLOBAL_STATUS_VARIABLES

Description:
All tests in the x test suite give UBSAN warnings:
sql/sql_udf.h:108:20: runtime error:
call to function (anonymous namespace)::reset_global_status_variables
(UDF_INIT*, UDF_ARGS*, char*, char*)
through pointer to incorrect function type 
'long long (*)(UDF_INIT *,UDF_ARGS *, unsigned char *, unsigned char *)'

Reviewed-by: Lukasz Kotula <[email protected]>
Reviewed-by: Tomasz Stepniak <[email protected]>
RB:19179

Author: Grzegorz Szwarc

plugin/x/src/components/global_status_reset.cc

@@ -29,8 +29,8 @@ REQUIRES_SERVICE_PLACEHOLDER(mysqlx_maintenance);
 
 namespace {
 
-long long reset_global_status_variables(UDF_INIT *, UDF_ARGS *, char *,
-                                        char *) {
+long long reset_global_status_variables(  // NOLINT(runtime/int)
+    UDF_INIT *, UDF_ARGS *, unsigned char *, unsigned char *) {
   return mysql_service_mysqlx_maintenance->reset_global_status_variables() ? 1
                                                                            : 0;
 }