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When CURSOR parameters get parsed, their sp_assignment_lex instances (one instance per parameter) get collected to List<sp_assignment_lex>. These instances get linked to sphead only in the end of the list. If a syntax error happened in the middle of the parameter list, these instances were not deleted, which caused memory leaks. Fix: using a Bison %destructor to free rules of the <sp_assignment_lex_list> type (on syntax errors). Afte the fix these sp_assignment_lex instances from CURSOR parameters deleted as follows: - If the CURSOR statement was fully parsed, then these instances get properly linked to sp_head structures, so they are deleted during ~sp_head (this did not change) - If the CURSOR statement failed on a syntax error, then by Bison's %destructor (this is being added in the current patch).
54 lines
939 B
Text
54 lines
939 B
Text
--echo #
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--echo # MDEV-30680 Warning: Memory not freed: 280 on mangled query, LeakSanitizer: detected memory leaks
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--echo #
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DELIMITER $$;
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--error ER_PARSE_ERROR
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BEGIN NOT ATOMIC
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IF SCALAR() expected_THEN_here;
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END
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$$
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DELIMITER ;$$
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DELIMITER $$;
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--error ER_PARSE_ERROR
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BEGIN NOT ATOMIC
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WHILE SCALAR() expected_DO_here;
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END
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$$
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DELIMITER ;$$
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DELIMITER $$;
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--error ER_PARSE_ERROR
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BEGIN NOT ATOMIC
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REPEAT SELECT 1; UNTIL SCALAR() expected_END_here;
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END
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$$
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DELIMITER ;$$
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--echo #
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--echo # MDEV-31578 DECLARE CURSOR: "Memory not freed: 280 bytes lost" on syntax error
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--echo #
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DELIMITER $$;
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--error ER_PARSE_ERROR
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BEGIN NOT ATOMIC
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DECLARE cur CURSOR (a INT) FOR SELECT a+1;
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OPEN cur(sp_followed_by_syntax_error();
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CLOSE cur;
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END;
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$$
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DELIMITER ;$$
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DELIMITER $$;
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--error ER_PARSE_ERROR
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BEGIN NOT ATOMIC
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DECLARE cur CURSOR (a INT) FOR SELECT a+1;
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OPEN cur(1,sp_followed_by_syntax_error();
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CLOSE cur;
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END;
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$$
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DELIMITER ;$$
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