Marks the specified tasks for termination. Termination occurs
    at the next allowable point after a specified task resumes
    execution.

    For HP Ada tasks, the effect is identical to executing an Ada
    abort statement for the tasks specified and causes these tasks
    to be marked as abnormal. Any dependent tasks are also marked for
    termination.

    For POSIX threads threads, use the following command:

    PTHREAD tset -c thread-number

    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.