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e1e5ce0da2
INSTALL PLUGIN There was mixed lock order between LOCK_plugin, LOCK_global_system_variables and LOCK_system_variables_hash. This patch ensures that write-lock on LOCK_system_variables_hash doesn't intersect with LOCK_plugin. Fixed by moving initialization/deinitialization of plugin options from plugin_add()/plugin_del() to plugin_initialize()/plugin_deinitalize(). So that plugin options are handled without protection of LOCK_plugin.
22 lines
481 B
Text
22 lines
481 B
Text
#
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# MDEV-5345 - Deadlock between mysql_change_user(), SHOW VARIABLES and
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# INSTALL PLUGIN
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#
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CREATE PROCEDURE p_install(x INT)
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BEGIN
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DECLARE CONTINUE HANDLER FOR 1126 BEGIN END;
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WHILE x DO
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SET x= x - 1;
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INSTALL PLUGIN no_such_plugin SONAME 'no_such_object';
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END WHILE;
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END|
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CREATE PROCEDURE p_show_vars(x INT)
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WHILE x DO
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SET x= x - 1;
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SHOW VARIABLES;
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END WHILE|
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CALL p_install(100);
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CALL p_show_vars(100);
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USE test;
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DROP PROCEDURE p_install;
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DROP PROCEDURE p_show_vars;
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