2004-06-04 Jeff Johnston <jjohnstn@redhat.com>

2004-06-04  Jeff Johnston  <jjohnstn@redhat.com>

        * infrun.c (handle_inferior_event): Don't treat an invalid ptid
        as a new thread event.
        * thread_db.c (thread_get_info_callback): If the thread is a
        zombie, return TD_THR_ZOMBIE.
        * (thread_from_lwp): If thread_get_info_callback returns
        TD_THR_ZOMBIE, check if the thread is still on the thread list
        and return a -1 ptid if not found.
        (thread_db_wait): If thread_from_lwp returns a -1 ptid, then
        change the status to TARGET_WAITKIND_SPURIOUS.