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Fix embedded/windows tests- move COND_manager and LOCK_manager to sql_manager.cc, to prevent race condition that results into accessing already destroyed critical section

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This commit is contained in:
Vladislav Vaintroub
2012-01-02 23:52:31 +01:00
parent 40c42468bc
commit a0afa025a3
3 changed files with 10 additions and 10 deletions
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4
sql/mysql_priv.h
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@ -2091,7 +2091,7 @@ extern pthread_mutex_t LOCK_mysql_create_db,LOCK_Acl,LOCK_open, LOCK_lock_db,
LOCK_mapped_file,LOCK_user_locks, LOCK_status,
LOCK_error_log, LOCK_delayed_insert, LOCK_short_uuid_generator,
LOCK_delayed_status, LOCK_delayed_create, LOCK_crypt, LOCK_timezone,
LOCK_slave_list, LOCK_active_mi, LOCK_manager, LOCK_global_read_lock,
LOCK_slave_list, LOCK_active_mi, LOCK_global_read_lock,
LOCK_global_system_variables, LOCK_user_conn,
LOCK_prepared_stmt_count,
LOCK_bytes_sent, LOCK_bytes_received, LOCK_connection_count;
@ -2109,7 +2109,7 @@ extern pthread_mutex_t LOCK_stats;
extern int mysqld_server_started;
extern rw_lock_t LOCK_grant, LOCK_sys_init_connect, LOCK_sys_init_slave;
extern rw_lock_t LOCK_system_variables_hash;
extern pthread_cond_t COND_refresh, COND_thread_count, COND_manager;
extern pthread_cond_t COND_refresh, COND_thread_count;
extern pthread_cond_t COND_global_read_lock;
extern pthread_attr_t connection_attrib;
extern I_List<THD> threads;

4
sql/mysqld.cc
View File

@ -1516,7 +1516,6 @@ static void clean_up_mutexes()
(void) pthread_mutex_destroy(&LOCK_delayed_insert);
(void) pthread_mutex_destroy(&LOCK_delayed_status);
(void) pthread_mutex_destroy(&LOCK_delayed_create);
(void) pthread_mutex_destroy(&LOCK_manager);
(void) pthread_mutex_destroy(&LOCK_crypt);
(void) pthread_mutex_destroy(&LOCK_bytes_sent);
(void) pthread_mutex_destroy(&LOCK_bytes_received);
@ -1557,7 +1556,6 @@ static void clean_up_mutexes()
(void) pthread_cond_destroy(&COND_global_read_lock);
(void) pthread_cond_destroy(&COND_thread_cache);
(void) pthread_cond_destroy(&COND_flush_thread_cache);
(void) pthread_cond_destroy(&COND_manager);
DBUG_VOID_RETURN;
}
@ -3817,7 +3815,6 @@ static int init_thread_environment()
(void) pthread_mutex_init(&LOCK_delayed_insert,MY_MUTEX_INIT_FAST);
(void) pthread_mutex_init(&LOCK_delayed_status,MY_MUTEX_INIT_FAST);
(void) pthread_mutex_init(&LOCK_delayed_create,MY_MUTEX_INIT_SLOW);
(void) pthread_mutex_init(&LOCK_manager,MY_MUTEX_INIT_FAST);
(void) pthread_mutex_init(&LOCK_crypt,MY_MUTEX_INIT_FAST);
(void) pthread_mutex_init(&LOCK_bytes_sent,MY_MUTEX_INIT_FAST);
(void) pthread_mutex_init(&LOCK_bytes_received,MY_MUTEX_INIT_FAST);
@ -3857,7 +3854,6 @@ static int init_thread_environment()
(void) pthread_cond_init(&COND_global_read_lock,NULL);
(void) pthread_cond_init(&COND_thread_cache,NULL);
(void) pthread_cond_init(&COND_flush_thread_cache,NULL);
(void) pthread_cond_init(&COND_manager,NULL);
#ifdef HAVE_REPLICATION
(void) pthread_mutex_init(&LOCK_rpl_status, MY_MUTEX_INIT_FAST);
(void) pthread_cond_init(&COND_rpl_status, NULL);

12
sql/sql_manager.cc
View File

@ -44,6 +44,7 @@ static struct handler_cb * volatile cb_list;
bool mysql_manager_submit(void (*action)())
{
bool result= FALSE;
DBUG_ASSERT(manager_thread_in_use);
struct handler_cb * volatile *cb;
pthread_mutex_lock(&LOCK_manager);
cb= &cb_list;
@ -75,8 +76,9 @@ pthread_handler_t handle_manager(void *arg __attribute__((unused)))
pthread_detach_this_thread();
manager_thread = pthread_self();
(void) pthread_cond_init(&COND_manager,NULL);
(void) pthread_mutex_init(&LOCK_manager,NULL);
manager_thread_in_use = 1;
for (;;)
{
pthread_mutex_lock(&LOCK_manager);
@ -123,6 +125,8 @@ pthread_handler_t handle_manager(void *arg __attribute__((unused)))
}
}
manager_thread_in_use = 0;
(void) pthread_mutex_destroy(&LOCK_manager);
(void) pthread_cond_destroy(&COND_manager);
DBUG_LEAVE; // Can't use DBUG_RETURN after my_thread_end
my_thread_end();
return (NULL);
@ -149,14 +153,14 @@ void stop_handle_manager()
{
DBUG_ENTER("stop_handle_manager");
abort_manager = true;
pthread_mutex_lock(&LOCK_manager);
if (manager_thread_in_use)
{
pthread_mutex_lock(&LOCK_manager);
DBUG_PRINT("quit", ("initiate shutdown of handle manager thread: 0x%lx",
(ulong)manager_thread));
pthread_cond_signal(&COND_manager);
pthread_cond_signal(&COND_manager);
pthread_mutex_unlock(&LOCK_manager);
}
pthread_mutex_unlock(&LOCK_manager);
DBUG_VOID_RETURN;
}