Fix mariabackup leaks (except my_load_defaults)

extra/mariabackup/backup_copy.cc

@@ -1351,7 +1351,8 @@ backup_files(const char *from, bool prep_mode)
 			if (rsync_tmpfile == NULL) {
 				msg("Error: can't open file %s\n",
 					rsync_tmpfile_name);
-				return(false);
+				ret = false;
+				goto out;
 			}
 
 			while (fgets(path, sizeof(path), rsync_tmpfile)) {
@@ -1390,24 +1391,22 @@ out:
 
 void backup_fix_ddl(void);
 
-#define LSN_PREFIX_IN_SHOW_STATUS  "\nLog sequence number "
-static lsn_t get_current_lsn(MYSQL *connection) {
-	MYSQL_RES *res = xb_mysql_query(connection, "SHOW ENGINE INNODB STATUS", true, false);
-	if (!res)
-		return 0;
-	MYSQL_ROW row = mysql_fetch_row(res);
-	DBUG_ASSERT(row);
-	if (row) {
-		const char *p = strstr(row[2],LSN_PREFIX_IN_SHOW_STATUS);
-		DBUG_ASSERT(p);
-		if (p)
-		{
-			p += sizeof(LSN_PREFIX_IN_SHOW_STATUS) - 1;
-			return (lsn_t)strtoll(p, NULL, 10);
+static lsn_t get_current_lsn(MYSQL *connection)
+{
+	static const char lsn_prefix[] = "\nLog sequence number ";
+	lsn_t lsn = 0;
+	if (MYSQL_RES *res = xb_mysql_query(connection,
+					    "SHOW ENGINE INNODB STATUS",
+					    true, false)) {
+		if (MYSQL_ROW row = mysql_fetch_row(res)) {
+			if (const char *p = strstr(row[2], lsn_prefix)) {
+				p += sizeof lsn_prefix - 1;
+				lsn = lsn_t(strtoll(p, NULL, 10));
+			}
 		}
+		mysql_free_result(res);
 	}
-	mysql_free_result(res);
-	return 0;
+	return lsn;
 }
 
 lsn_t server_lsn_after_lock;

extra/mariabackup/backup_mysql.cc

@@ -916,6 +916,7 @@ DECLARE_THREAD(kill_mdl_waiters_thread(void *))
 				exit(EXIT_FAILURE);
 			}
 		}
+		mysql_free_result(result);
 	}
 
 	mysql_close(mysql);

extra/mariabackup/xtrabackup.cc

@@ -523,7 +523,9 @@ static os_event_t dbug_start_query_thread(
 		mysql_thread_id(par->con), wait_state);
 	for (;;) {
 		MYSQL_RES *result = xb_mysql_query(mysql_connection,q, true, true);
-		if (mysql_fetch_row(result)) {
+		bool exists = mysql_fetch_row(result) != NULL;
+		mysql_free_result(result);
+		if (exists) {
 			goto end;
 		}
 		msg_ts("Waiting for query '%s' on connection %lu to "
@@ -578,7 +580,9 @@ std::string filename_to_spacename(const byte *filename, size_t len)
 	char *db = strrchr(f, '/');
 	ut_a(db);
 	*table = '/';
-	return std::string(db+1);
+	std::string s(db+1);
+	free(f);
+	return s;
 }
 
 /** Report an operation to create, delete, or rename a file during backup.
@@ -4164,7 +4168,6 @@ fail:
 
 	/* start back ground thread to copy newer log */
 	os_thread_id_t log_copying_thread_id;
-	datafiles_iter_t *it;
 
 	/* get current checkpoint_lsn */
 	/* Look for the latest checkpoint from any of the log groups */
@@ -4322,7 +4325,7 @@ fail_before_log_copying_thread_start:
 				"Waiting for table metadata lock", 1, ER_QUERY_INTERRUPTED););
 	}
 
-	it = datafiles_iter_new(fil_system);
+	datafiles_iter_t *it = datafiles_iter_new(fil_system);
 	if (it == NULL) {
 		msg("mariabackup: Error: datafiles_iter_new() failed.\n");
 		goto fail;
@@ -4531,7 +4534,7 @@ void backup_fix_ddl(void)
 		fil_space_close(n->space->name);
 		fil_space_free(n->space->id, false);
 	}
-
+	datafiles_iter_free(it);
 
 	for (std::set<std::string>::iterator iter = new_tables.begin();
 		iter != new_tables.end(); iter++) {
@@ -4578,6 +4581,8 @@ void backup_fix_ddl(void)
 #endif
 		xtrabackup_copy_datafile(node, 0, dest_name.c_str()/*, do_full_copy ? ULONGLONG_MAX:UNIV_PAGE_SIZE */);
 	}
+
+	datafiles_iter_free(it);
 }
 
 /* ================= prepare ================= */