Misc valgrind warnings when running a Random Query Generator test

[Philip Stoev]

When running a RQG test under valgrind against Maria 5.2, the following valgrind warnings were reported:

==6713== Conditional jump or move depends on uninitialised value(s)
==6713== at 0x4E3427E: open_query::oqgraph::modify_edge(open_query::oqgraph::current_row_st, unsigned long long*, unsigned long long*, double*, bool) (graphcore.cc:648)
==6713== by 0x4E2C47D: ha_oqgraph::update_row(unsigned char const*, unsigned char*) (ha_oqgraph.cc:545)
==6713== by 0x83AA698: handler::ha_update_row(unsigned char const*, unsigned char*) (handler.cc:4869)
==6713== by 0x832D9B5: mysql_update(THD*, TABLE_LIST*, List<Item>&, List<Item>&, Item*, unsigned int, st_order*, unsigned long long, enum_duplicates, bool) (sql_update.cc:652)
==6713== by 0x8282B3C: mysql_execute_command(THD*) (sql_parse.cc:3120)
==6713== by 0x828BB46: mysql_parse(THD*, char const*, unsigned int, char const**) (sql_parse.cc:6055)
==6713== by 0x827DCA6: dispatch_command(enum_server_command, THD*, char*, unsigned int) (sql_parse.cc:1204)
==6713== by 0x827D102: do_command(THD*) (sql_parse.cc:898)
==6713== by 0x827A1EB: handle_one_connection (sql_connect.cc:1154)
==6713== by 0xBEA918: start_thread (in /lib/libpthread-2.12.so)
==6713== by 0xB2CCBD: clone (in /lib/libc-2.12.so)
==6713==
==6713== Conditional jump or move depends on uninitialised value(s)
==6713== at 0x4E34732: open_query::oqgraph::insert_edge(unsigned long long, unsigned long long, double, bool) (graphcore.cc:558)
==6713== by 0x4E2BE63: ha_oqgraph::write_row(unsigned char*) (ha_oqgraph.cc:463)
==6713== by 0x83AA526: handler::ha_write_row(unsigned char*) (handler.cc:4846)
==6713== by 0x8318C31: write_record(THD*, st_table*, st_copy_info*) (sql_insert.cc:1638)
==6713== by 0x831CE56: select_insert::send_data(List<Item>&) (sql_insert.cc:3223)
==6713== by 0x8305EC2: end_send(JOIN*, st_join_table*, bool) (sql_select.cc:12612)
==6713== by 0x83040C7: evaluate_join_record(JOIN*, st_join_table*, int) (sql_select.cc:11788)
==6713== by 0x8303D4A: sub_select(JOIN*, st_join_table*, bool) (sql_select.cc:11660)
==6713== by 0x83038AA: do_select(JOIN*, List<Item>*, st_table*, Procedure*) (sql_select.cc:11416)
==6713== by 0x82ECB8F: JOIN::exec() (sql_select.cc:2328)
==6713== by 0x82ED2AC: mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) (sql_select.cc:2528)
==6713== by 0x82E5B40: handle_select(THD*, st_lex*, select_result*, unsigned long) (sql_select.cc:280)
==6713== by 0x82833D6: mysql_execute_command(THD*) (sql_parse.cc:3290)
==6713== by 0x828BB46: mysql_parse(THD*, char const*, unsigned int, char const**) (sql_parse.cc:6055)
==6713== by 0x827DCA6: dispatch_command(enum_server_command, THD*, char*, unsigned int) (sql_parse.cc:1204)
==6713== by 0x827D102: do_command(THD*) (sql_parse.cc:898)
==6713==
==6713== Conditional jump or move depends on uninitialised value(s)
==6713== at 0x4E2BEC3: ha_oqgraph::write_row(unsigned char*) (ha_oqgraph.cc:468)
==6713== by 0x83AA526: handler::ha_write_row(unsigned char*) (handler.cc:4846)
==6713== by 0x8318C31: write_record(THD*, st_table*, st_copy_info*) (sql_insert.cc:1638)
==6713== by 0x831CE56: select_insert::send_data(List<Item>&) (sql_insert.cc:3223)
==6713== by 0x8305EC2: end_send(JOIN*, st_join_table*, bool) (sql_select.cc:12612)
==6713== by 0x83040C7: evaluate_join_record(JOIN*, st_join_table*, int) (sql_select.cc:11788)
==6713== by 0x8303D4A: sub_select(JOIN*, st_join_table*, bool) (sql_select.cc:11660)
==6713== by 0x83038AA: do_select(JOIN*, List<Item>*, st_table*, Procedure*) (sql_select.cc:11416)
==6713== by 0x82ECB8F: JOIN::exec() (sql_select.cc:2328)
==6713== by 0x82ED2AC: mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) (sql_select.cc:2528)
==6713== by 0x82E5B40: handle_select(THD*, st_lex*, select_result*, unsigned long) (sql_select.cc:280)
==6713== by 0x82833D6: mysql_execute_command(THD*) (sql_parse.cc:3290)
==6713== by 0x828BB46: mysql_parse(THD*, char const*, unsigned int, char const**) (sql_parse.cc:6055)
==6713== by 0x827DCA6: dispatch_command(enum_server_command, THD*, char*, unsigned int) (sql_parse.cc:1204)
==6713== by 0x827D102: do_command(THD*) (sql_parse.cc:898)
==6713== by 0x827A1EB: handle_one_connection (sql_connect.cc:1154)

bzr version-info:
revision-id: <email address hidden>
date: 2010-08-26 16:20:27 +0300
build-date: 2010-09-11 14:52:18 +0300
revno: 2849
branch-nick: maria-5.2

The test case will be uploaded shortly

[Philip Stoev (pstoev-askmonty)]

Valgrind also reports various memory leaks.

[Philip Stoev (pstoev-askmonty)]

To reproduce, please obtain the Random Query Generator

bzr branch lp:randgen

and then run the following command line, tailored to your environment:

perl runall.pl \
--grammar=bug635691yy
--mysqld=--init-file=/home/philips/bzr/randgen-oqgraph/conf/oqgraph/bug635691.init
--basedir=/home/philips/bzr/maria-5.2/
--mysqld=--plugin-load=oqgraph_engine.so
--mysqld=--plugin-dir=/home/philips/bzr/maria-5.2/storage/oqgraph/.libs
--queries=10K
--valgrind
--threads=2

You can disregard any output from the test framework and instead directly monitor the server error log for valgrind warnings. You can interrupt the test with Ctrl+C and initiate a mysqld shutdown using the mysqladmin tool in order to observe the valgrind warnings that are printed when the server exists.

More information about the tool is available from http://forge.mysql.com/RandomQueryGenerator