########################################################################
# Tests for BACKUP STAGE locking that requires debug.
########################################################################

--source include/have_debug_sync.inc
--source include/have_innodb.inc

--echo #
--echo # Make sure pending LOCK TABLES doesn't block BACKUP STAGE
--echo #
CREATE TABLE t1(a INT);
LOCK TABLE t1 READ;

--echo #
connect (con1,localhost,root,,);
SET DEBUG_SYNC= 'mdl_acquire_lock_wait SIGNAL ready';
--send LOCK TABLE t1 WRITE

--echo #
connect (con2,localhost,root,,);
SET DEBUG_SYNC= 'now WAIT_FOR ready';
BACKUP STAGE START;
BACKUP STAGE FLUSH;
BACKUP STAGE BLOCK_DDL;
BACKUP STAGE END;
disconnect con2;

--echo #
connection default;
UNLOCK TABLES;

--echo #
connection con1;
reap;
UNLOCK TABLES;
disconnect con1;

--echo #
connection default;
DROP TABLE t1;
SET DEBUG_SYNC= 'RESET';


--echo #
--echo # Demonstrates a deadlock if BACKUP namespace is reorder after SCHEMA.
--echo # Culprit is ALTER TABLE taking SCHEMA lock on target database after
--echo # BACKUP lock was acquired.
--echo #
CREATE DATABASE test2;
CREATE TABLE t1(a INT) ENGINE=InnoDB;

SET DEBUG_SYNC='alter_opened_table SIGNAL ready WAIT_FOR go';
send ALTER TABLE t1 RENAME TO test2.t1;

connect (con1,localhost,root,,);
SET DEBUG_SYNC='now WAIT_FOR ready';
BACKUP STAGE START;
SET DEBUG_SYNC='mdl_acquire_lock_wait SIGNAL ready1';
send BACKUP STAGE BLOCK_DDL;

connect (con2,localhost,root,,);
SET DEBUG_SYNC='now WAIT_FOR ready1';
SET DEBUG_SYNC='mdl_acquire_lock_wait SIGNAL go';
send DROP DATABASE test2;

connection default;
reap;

connection con1;
reap;
disconnect con1;

connection con2;
reap;
disconnect con2;

connection default;
SET DEBUG_SYNC='reset';
