MDEV-5131 create_embedded_thd is not thread safe, libmysqld.

LOCK_thread_count locked when we do threads.append().

MDEV-5131 create_embedded_thd is not thread safe, libmysqld.
LOCK_thread_count locked when we do threads.append().
e37639e9 · Alexey Botchkov · 508d40fb · e37639e9
Commit e37639e9 authored Oct 13, 2013 by Alexey Botchkov
Hide whitespace changes
Inline Side-by-side

Showing with 2 additions and 0 deletions

libmysqld/lib_sql.cc libmysqld/lib_sql.cc +2 -0

No files found.
--- a/libmysqld/lib_sql.cc
+++ b/libmysqld/lib_sql.cc
@@ -683,8 +683,10 @@ void *create_embedded_thd(int client_flag)
  thd->data_tail= &thd->first_data;
  bzero((char*) &thd->net, sizeof(thd->net));

+  mysql_mutex_lock(&LOCK_thread_count);
  thread_count++;
  threads.append(thd);
+  mysql_mutex_unlock(&LOCK_thread_count);
  thd->mysys_var= 0;
  return thd;
 err: