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5.1 repository of tomas. When tomas does a push these changes will
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ChangeSet
1.2415 07/02/05 12:04:36 tomas@stripped +1 -0
Bug #26019 - valgrind warning ndbcluster_log_schema_op/safe_mutex_lock invalid read
protect the setting of ndb_schema_share = NULL with a mutex
sql/ha_ndbcluster_binlog.cc
1.96 07/02/05 12:04:28 tomas@stripped +36 -0
protect the setting of ndb_schema_share = NULL with a mutec
# This is a BitKeeper patch. What follows are the unified diffs for the
# set of deltas contained in the patch. The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User: tomas
# Host: poseidon.mysql.com
# Root: /home/tomas/mysql-5.1-telco-cga
--- 1.95/sql/ha_ndbcluster_binlog.cc 2006-12-31 07:04:56 +07:00
+++ 1.96/sql/ha_ndbcluster_binlog.cc 2007-02-05 12:04:28 +07:00
@@ -97,6 +97,7 @@
NDB_SHARE *ndb_apply_status_share= 0;
NDB_SHARE *ndb_schema_share= 0;
+pthread_mutex_t ndb_schema_share_mutex;
/* Schema object distribution handling */
HASH ndb_schema_objects;
@@ -621,6 +622,7 @@
pthread_mutex_destroy(&injector_mutex);
pthread_cond_destroy(&injector_cond);
+ pthread_mutex_destroy(&ndb_schema_share_mutex);
#endif
DBUG_RETURN(0);
}
@@ -1271,6 +1273,16 @@
int no_storage_nodes= g_ndb_cluster_connection->no_db_nodes();
bitmap_init(&schema_subscribers, bitbuf, sizeof(bitbuf)*8, FALSE);
bitmap_set_all(&schema_subscribers);
+
+ /* begin protect ndb_schema_share */
+ pthread_mutex_lock(&ndb_schema_share_mutex);
+ if (ndb_schema_share == 0)
+ {
+ pthread_mutex_unlock(&ndb_schema_share_mutex);
+ if (ndb_schema_object)
+ ndb_free_schema_object(&ndb_schema_object, FALSE);
+ DBUG_RETURN(0);
+ }
(void) pthread_mutex_lock(&ndb_schema_share->mutex);
for (i= 0; i < no_storage_nodes; i++)
{
@@ -1283,6 +1295,9 @@
}
}
(void) pthread_mutex_unlock(&ndb_schema_share->mutex);
+ pthread_mutex_unlock(&ndb_schema_share_mutex);
+ /* end protect ndb_schema_share */
+
if (updated)
{
bitmap_clear_bit(&schema_subscribers, node_id);
@@ -1478,6 +1493,14 @@
&abstime);
if (thd->killed)
break;
+
+ /* begin protect ndb_schema_share */
+ pthread_mutex_lock(&ndb_schema_share_mutex);
+ if (ndb_schema_share == 0)
+ {
+ pthread_mutex_unlock(&ndb_schema_share_mutex);
+ break;
+ }
(void) pthread_mutex_lock(&ndb_schema_share->mutex);
for (i= 0; i < no_storage_nodes; i++)
{
@@ -1487,6 +1510,8 @@
bitmap_intersect(&schema_subscribers, tmp);
}
(void) pthread_mutex_unlock(&ndb_schema_share->mutex);
+ pthread_mutex_unlock(&ndb_schema_share_mutex);
+ /* end protect ndb_schema_share */
/* remove any unsubscribed from ndb_schema_object->slock */
bitmap_intersect(&ndb_schema_object->slock_bitmap, &schema_subscribers);
@@ -1910,8 +1935,14 @@
ndb_binlog_tables_inited && ndb_binlog_running)
sql_print_information("NDB Binlog: ndb tables initially "
"read only on reconnect.");
+
+ /* begin protect ndb_schema_share */
+ pthread_mutex_lock(&ndb_schema_share_mutex);
free_share(&ndb_schema_share);
ndb_schema_share= 0;
+ pthread_mutex_unlock(&ndb_schema_share_mutex);
+ /* end protect ndb_schema_share */
+
close_cached_tables((THD*) 0, 0, (TABLE_LIST*) 0, FALSE);
// fall through
case NDBEVENT::TE_ALTER:
@@ -2278,6 +2309,7 @@
pthread_mutex_init(&injector_mutex, MY_MUTEX_INIT_FAST);
pthread_cond_init(&injector_cond, NULL);
+ pthread_mutex_init(&ndb_schema_share_mutex, MY_MUTEX_INIT_FAST);
/* Create injector thread */
if (pthread_create(&ndb_binlog_thread, &connection_attrib,
@@ -3966,8 +3998,12 @@
}
if (ndb_schema_share)
{
+ /* begin protect ndb_schema_share */
+ pthread_mutex_lock(&ndb_schema_share_mutex);
free_share(&ndb_schema_share);
ndb_schema_share= 0;
+ pthread_mutex_unlock(&ndb_schema_share_mutex);
+ /* end protect ndb_schema_share */
}
/* remove all event operations */
Thread |
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• bk commit into 5.1 tree (tomas:1.2415) BUG#26019 | tomas | 5 Feb |