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author | Gleb Shchepa <gshchepa@mysql.com> | 2009-07-24 20:58:58 +0500 |
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committer | Gleb Shchepa <gshchepa@mysql.com> | 2009-07-24 20:58:58 +0500 |
commit | dc0a87fdc24ed0859856d243ad68a0c1913db3af (patch) | |
tree | 09d21c8df0aaa2410de0d4420236458edc9d4022 /sql/sql_repl.cc | |
parent | 85c97e6c690869948bbc549f4a7e9e5ccf11d18d (diff) | |
download | mariadb-git-dc0a87fdc24ed0859856d243ad68a0c1913db3af.tar.gz |
Bug #38816: kill + flush tables with read lock + stored
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).
sql/ha_myisam.cc:
Bug #38816: kill + flush tables with read lock + stored
procedures causes crashes!
Modification of THD::query/query_length has been guarded
with the a THD::set_query() method call/LOCK_thd_data
mutex.
Unnecessary locking with the global LOCK_thread_count
mutex has been removed.
sql/log_event.cc:
Bug #38816: kill + flush tables with read lock + stored
procedures causes crashes!
Modification of THD::query/query_length has been guarded
with the THD::set_query()) method call/LOCK_thd_data
mutex.
sql/slave.cc:
Bug #38816: kill + flush tables with read lock + stored
procedures causes crashes!
Modification of THD::query/query_length has been guarded
with the THD::set_query() method call/LOCK_thd_data mutex.
The THD::LOCK_delete mutex has been renamed to
THD::LOCK_thd_data.
sql/sp_head.cc:
Bug #38816: kill + flush tables with read lock + stored
procedures causes crashes!
Modification of THD::query/query_length has been guarded
with the a THD::set_query() method call/LOCK_thd_data
mutex.
sql/sql_class.cc:
Bug #38816: kill + flush tables with read lock + stored
procedures causes crashes!
The new THD::LOCK_thd_data mutex and THD::set_query()
method has been added to guard modifications of THD::query/
THD::query_length fields, also the Statement::set_statement()
method has been overloaded in the THD class.
The THD::LOCK_delete mutex has been renamed to
THD::LOCK_thd_data.
sql/sql_class.h:
Bug #38816: kill + flush tables with read lock + stored
procedures causes crashes!
The new THD::LOCK_thd_data mutex and THD::set_query()
method has been added to guard modifications of THD::query/
THD::query_length fields, also the Statement::set_statement()
method has been overloaded in the THD class.
The THD::LOCK_delete mutex has been renamed to
THD::LOCK_thd_data.
sql/sql_insert.cc:
Bug #38816: kill + flush tables with read lock + stored
procedures causes crashes!
Modification of THD::query/query_length has been guarded
with the a THD::set_query() method call/LOCK_thd_data
mutex.
sql/sql_parse.cc:
Bug #38816: kill + flush tables with read lock + stored
procedures causes crashes!
Modification of THD::query/query_length has been guarded
with the a THD::set_query() method call/LOCK_thd_data mutex.
sql/sql_repl.cc:
Bug #38816: kill + flush tables with read lock + stored
procedures causes crashes!
The THD::LOCK_delete mutex has been renamed to
THD::LOCK_thd_data.
sql/sql_show.cc:
Bug #38816: kill + flush tables with read lock + stored
procedures causes crashes!
Inter-thread read of THD::query/query_length field has
been protected with a new per-thread LOCK_thd_data
mutex in the mysqld_list_processes function.
Diffstat (limited to 'sql/sql_repl.cc')
-rw-r--r-- | sql/sql_repl.cc | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sql/sql_repl.cc b/sql/sql_repl.cc index 3d2cee6433b..f8654402bcd 100644 --- a/sql/sql_repl.cc +++ b/sql/sql_repl.cc @@ -1044,7 +1044,7 @@ void kill_zombie_dump_threads(uint32 slave_server_id) if (tmp->command == COM_BINLOG_DUMP && tmp->server_id == slave_server_id) { - pthread_mutex_lock(&tmp->LOCK_delete); // Lock from delete + pthread_mutex_lock(&tmp->LOCK_thd_data); // Lock from delete break; } } @@ -1057,7 +1057,7 @@ void kill_zombie_dump_threads(uint32 slave_server_id) again. We just to do kill the thread ourselves. */ tmp->awake(THD::KILL_QUERY); - pthread_mutex_unlock(&tmp->LOCK_delete); + pthread_mutex_unlock(&tmp->LOCK_thd_data); } } |