Hello. Please review the fix for jdk9.
There are a few issues which can cause a hang in some of our menu stress tests: - Lack in synchronization in the Menu, we tried to synchronized the write of fields, but skip synchronization when we read the fields(in getters for example). In the fix most of the fields were marked as final(if possible) or volatile. - When the submenu is removed from Menu/MenuBar we do not reset its parent field if the Menu/MenuBar have peer==null. So if later we tried to call MenuBar.setHelpMenu(submenu) we skip this submenu because we think it was added already.
Bug: https://bugs.openjdk.java.net/browse/JDK-8165769 Webrev can be found at: http://cr.openjdk.java.net/~serb/8165769/webrev.00 -- Best regards, Sergey.
