innodb_trx_weight.inc

-- connect (con1,localhost,root,,)
-- connect (con2,localhost,root,,)

-- connection con1
SET autocommit=0;
SELECT * FROM t1 FOR UPDATE;
-- if ($con1_extra_sql_present) {
        -- eval $con1_extra_sql
-- }

-- connection con2
SET autocommit=0;
SELECT * FROM t2 FOR UPDATE;
-- if ($con2_extra_sql_present) {
        -- eval $con2_extra_sql
-- }

-- if ($con1_should_be_rolledback) {
        -- connection con1
        -- send
        INSERT INTO t2 VALUES (0);

        -- connection con2
        INSERT INTO t1 VALUES (0);
        ROLLBACK;

        -- connection con1
        -- error ER_LOCK_DEADLOCK
        -- reap
-- }
# else
-- if (!$con1_should_be_rolledback) {
        -- connection con2
        -- send
        INSERT INTO t1 VALUES (0);

        -- connection con1
        INSERT INTO t2 VALUES (0);
        ROLLBACK;

        -- connection con2
        -- error ER_LOCK_DEADLOCK
        -- reap
-- }

-- connection default

DELETE FROM t5_nontrans;

-- disconnect con1
-- disconnect con2