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Fix remaining cases of Bug #3596: fix possible races caused by an obsolete value of thd->query_length in SHOW PROCESSLIST and SHOW INNODB STATUS; this fix depends on the fact that thd->query is always set to NULL before setting it to point to a new query
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heikki@hundin.mysql.fi
2004-05-14 16:48:56 +03:00
parent b4ae2577f0
commit 02f51ccf2d
7 changed files with 33 additions and 5 deletions
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6
sql/sql_show.cc
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@@ -1141,7 +1141,11 @@ void mysqld_list_processes(THD *thd,const char *user, bool verbose)
thd_info->query=0;
if (tmp->query)
{
/* query_length is always set before tmp->query */
/*
query_length is always set to 0 when we set query = NULL; see
the comment in sql_class.h why this prevents crashes in possible
races with query_length
*/
uint length= min(max_query_length, tmp->query_length);
thd_info->query=(char*) thd->memdup(tmp->query,length+1);
thd_info->query[length]=0;