MDEV-24546 : AddressSanitizer: initialization-order-fiasco on address ... in...

MDEV-24546 : AddressSanitizer: initialization-order-fiasco on address ... in Sys_var_integer from __static_initialization_and_destruction_0, possibly inside global var wsrep_gtid_server

Galera parameter wsrep_gtid_domain_id was defined using a class where
actual parameter was not a first member. Fixed this by using normal
variable and assigning this value to class member value.

sql/sys_vars.cc

@@ -6051,8 +6051,10 @@ static Sys_var_uint Sys_wsrep_gtid_domain_id(
        "wsrep_gtid_domain_id", "When wsrep_gtid_mode is set, this value is "
        "used as gtid_domain_id for galera transactions and also copied to the "
        "joiner nodes during state transfer. It is ignored, otherwise.",
-       GLOBAL_VAR(wsrep_gtid_server.domain_id), CMD_LINE(REQUIRED_ARG),
-       VALID_RANGE(0, UINT_MAX32), DEFAULT(0), BLOCK_SIZE(1));
+       GLOBAL_VAR(wsrep_gtid_domain_id), CMD_LINE(REQUIRED_ARG),
+       VALID_RANGE(0, UINT_MAX32), DEFAULT(0), BLOCK_SIZE(1),
+       NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0),
+       ON_UPDATE(wsrep_gtid_domain_id_update));
 
 static Sys_var_ulonglong Sys_wsrep_gtid_seq_no(
        "wsrep_gtid_seq_no",

sql/wsrep_mysqld.cc

@@ -110,6 +110,7 @@ ulong wsrep_mysql_replication_bundle;
 
 bool              wsrep_gtid_mode;              // Enable WSREP native GTID support
 Wsrep_gtid_server wsrep_gtid_server;
+uint  wsrep_gtid_domain_id=0;                   // Domain id on above structure
 
 /* Other configuration variables and their default values. */
 my_bool wsrep_incremental_data_collection= 0;   // Incremental data collection

sql/wsrep_mysqld.h

@@ -101,6 +101,7 @@ extern ulong       wsrep_running_rollbacker_threads;
 extern bool        wsrep_new_cluster;
 extern bool        wsrep_gtid_mode;
 extern my_bool     wsrep_strict_ddl;
+extern uint        wsrep_gtid_domain_id;
 
 enum enum_wsrep_reject_types {
   WSREP_REJECT_NONE,    /* nothing rejected */

sql/wsrep_var.cc

@@ -961,3 +961,11 @@ void wsrep_free_status (THD* thd)
 {
   thd->wsrep_status_vars.clear();
 }
+
+bool wsrep_gtid_domain_id_update(sys_var* self, THD *thd, enum_var_type)
+{
+  WSREP_DEBUG("wsrep_gtid_domain_id_update: %llu",
+              wsrep_gtid_domain_id);
+  wsrep_gtid_server.domain_id= wsrep_gtid_domain_id;
+  return false;
+}

sql/wsrep_var.h

@@ -105,6 +105,7 @@ extern bool wsrep_debug_update               UPDATE_ARGS;
 
 extern bool wsrep_gtid_seq_no_check          CHECK_ARGS;
 
+extern bool wsrep_gtid_domain_id_update      UPDATE_ARGS;
 #else  /* WITH_WSREP */
 
 #define wsrep_provider_init(X)