| Bug #57508 | uninitialised value when calling master_pos_wait with numeric argument | ||
|---|---|---|---|
| Submitted: | 18 Oct 2010 7:20 | Modified: | 24 Oct 2010 10:37 |
| Reporter: | Shane Bester (Platinum Quality Contributor) | Email Updates: | |
| Status: | Can't repeat | Impact on me: | |
| Category: | MySQL Server: Replication | Severity: | S3 (Non-critical) |
| Version: | 5.1.53-debug | OS: | Linux (FC13 x64) |
| Assigned to: | CPU Architecture: | Any | |
| Tags: | master_pos_wait, valgrind | ||
[18 Oct 2010 7:33]
Valeriy Kravchuk
I can not repeat this on 32-bit Ubuntu 10.04.
[20 Oct 2010 19:41]
Sveta Smirnova
Thank you for the report. I can not repeat it as well. Please provide compile options you used and version of valgrind.
[6 Jun 2011 12:36]
MySQL Verification Team
for future reference i filed oracle bug #12626874 which may or may not be related here.
Description: 5.1.53 valgrind output: Conditional jump or move depends on uninitialised value(s) at: String::c_ptr (sql_string.h:105) by: Relay_log_info::wait_for_pos (rpl_rli.cc:657) by: Item_master_pos_wait::val_int (item_func.cc:3372) by: Item_int_func::val_str (item_func.cc:625) by: Item_func_concat_ws::val_str (item_strfunc.cc:659) by: Item::send (item.cc:5576) by: select_send::send_data (sql_class.cc:1691) by: end_send_group (sql_select.cc:12425) by: do_select (sql_select.cc:11147) by: JOIN::exec (sql_select.cc:2331) by: mysql_select (sql_select.cc:2534) by: handle_select (sql_select.cc:269) by: execute_sqlcom_select (sql_parse.cc:5127) by: mysql_execute_command (sql_parse.cc:2292) by: mysql_parse (sql_parse.cc:6051) by: dispatch_command (sql_parse.cc:1260) by: do_command (sql_parse.cc:888) by: handle_one_connection (sql_connect.cc:1136) by: start_thread (pthread_create.c:301) The offending code is only in debug builds: DBUG_PRINT("enter",("log_name: '%s' log_pos: %lu timeout: %lu", log_name->c_ptr(), (ulong) log_pos, (ulong) timeout)); How to repeat: run debug build of mysqld in valgrind: valgrind -v --leak-check=full --show-reachable=yes --db-attach=yes --tool=memcheck --num-callers=50 ./bin/mysqld --no-defaults --basedir=. --datadir=./data --skip-gr --skip-na Then: select master_pos_wait(0,0);