mirror of
https://github.com/MariaDB/server.git
synced 2025-10-28 17:15:19 +03:00
e2a99f1863
Deadlock happened due to mixed lock order. CREATE/DROP function: wrlock(THR_LOCK_udf) -> lock(LOCK_open) SELECT from view: lock(LOCK_open) -> rdlock(THR_LOCK_udf) Fixed CREATE/DROP function so that LOCK_open does not intersect with wrlock(THR_LOCK_udf). 10.0 is not affected: it doesn't hold LOCK_open while opening view.
41 lines
1.1 KiB
Plaintext
41 lines
1.1 KiB
Plaintext
--source include/have_debug_sync.inc
|
|
--source include/have_udf.inc
|
|
|
|
#
|
|
# MDEV-5616 - Deadlock between CREATE/DROP FUNCTION and SELECT from view
|
|
#
|
|
--replace_result $UDF_EXAMPLE_SO UDF_EXAMPLE_LIB
|
|
eval CREATE FUNCTION myfunc_int RETURNS INTEGER SONAME "$UDF_EXAMPLE_SO";
|
|
CREATE VIEW v1 AS SELECT myfunc_int(1);
|
|
connect(con1, localhost, root,,);
|
|
|
|
connection con1;
|
|
SET debug_sync='mysql_create_function_after_lock SIGNAL locked WAIT_FOR go';
|
|
--replace_result $UDF_EXAMPLE_SO UDF_EXAMPLE_LIB
|
|
send_eval CREATE FUNCTION myfunc_double RETURNS REAL SONAME "$UDF_EXAMPLE_SO";
|
|
|
|
connection default;
|
|
SET debug_sync='now WAIT_FOR locked';
|
|
SET debug_sync='find_udf_before_lock SIGNAL go';
|
|
SELECT * FROM v1;
|
|
FLUSH TABLES;
|
|
|
|
connection con1;
|
|
reap;
|
|
SET debug_sync='mysql_drop_function_after_lock SIGNAL locked WAIT_FOR go';
|
|
send DROP FUNCTION myfunc_double;
|
|
|
|
connection default;
|
|
SET debug_sync='now WAIT_FOR locked';
|
|
SET debug_sync='find_udf_before_lock SIGNAL go';
|
|
SELECT * FROM v1;
|
|
|
|
connection con1;
|
|
reap;
|
|
disconnect con1;
|
|
|
|
connection default;
|
|
SET debug_sync='RESET';
|
|
DROP VIEW v1;
|
|
DROP FUNCTION myfunc_int;
|