When the event facility is THREADS, use the command.

    Displays additional information for each task selected for
    display. The additional information is provided if you use /FULL
    by itself or with /CALLS or /STATISTICS.

    You can get help on POSIX threads debugger commands by typing
    PTHREAD HELP.

    See the Guide to the POSIX Threads Library for more information
    about using the POSIX threads debugger.