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Bug #38816: kill + flush tables with read lock + stored

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procedures causes crashes!

The problem of that bugreport was mostly fixed by the
patch for bug 38691.
However, attached test case focused on another crash or
valgrind warning problem: SHOW PROCESSLIST query accesses
freed memory of SP instruction that run in a parallel
connection.

Changes of thd->query/thd->query_length in dangerous
places have been guarded with the per-thread
LOCK_thd_data mutex (the THD::LOCK_delete mutex has been
renamed to THD::LOCK_thd_data).
This commit is contained in:
Gleb Shchepa
2009-07-24 20:58:58 +05:00
parent ec7ea44541
commit 6aea4cebfc
10 changed files with 100 additions and 99 deletions
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2
sql/sql_insert.cc
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@@ -1854,7 +1854,7 @@ bool delayed_get_table(THD *thd, TABLE_LIST *table_list)
thread_count++;
pthread_mutex_unlock(&LOCK_thread_count);
di->thd.set_db(table_list->db, (uint) strlen(table_list->db));
di->thd.query= my_strdup(table_list->table_name, MYF(MY_WME));
di->thd.set_query(my_strdup(table_list->table_name, MYF(MY_WME)), 0);
if (di->thd.db == NULL || di->thd.query == NULL)
{
/* The error is reported */