Fix two Valgrind memory leak warnings.

client/mysqlbinlog.cc:
  Now my_end() deallocates DBUG by default, but that fails in mysqlbinlog
  because of global destructors that use DBUG.
dbug/dbug.c:
  Add a facility to deallocate the debug stack, to avoid memory leak warnings
  in Valgrind.
include/my_dbug.h:
  Add a facility to deallocate the debug stack, to avoid memory leak warnings
  in Valgrind.
include/my_sys.h:
  Change my_end() to deallocate DBUG memory by default (can be disabled with
  MY_DONT_FREE_DBUG option).
libmysql/libmysql.c:
  Do not deallocate DBUG during cleanup.
mysys/my_init.c:
  Change my_end() to deallocate DBUG memory by default (can be disabled with
  MY_DONT_FREE_DBUG option).
sql/mysqld.cc:
  Add missing my_thread_end() call, seems to occasionally trigger a memory
  leak (not repeatable).

1 files changed, 3 insertions, 1 deletions

diff --git a/mysys/my_init.c b/mysys/my_init.c
index c2bfdde0ddd..9b8d4db172f 100644
--- a/mysys/my_init.c
+++ b/mysys/my_init.c
@@ -196,8 +196,10 @@ Voluntary context switches %ld, Involuntary context switches %ld\n",
    _CrtDumpMemoryLeaks();
 #endif
   }
+
+  if (!(infoflag & MY_DONT_FREE_DBUG))
+    DBUG_END();                /* Must be done before my_thread_end */
 #ifdef THREAD
-  DBUG_POP();				/* Must be done before my_thread_end */
   my_thread_end();
   my_thread_global_end();
 #if defined(SAFE_MUTEX)