Library /sys$common/syshlp/dbg$uihelp.hlb DEBUGUI, task  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Tasking programs have multiple threads of execution within a process
  and include the following:

   -  Programs written in any language that use DECthreads or POSIX
      1003.1b services.

   -  Programs that use language-specific tasking services (services
      provided directly by the language).  Currently, Ada is the only
      language with built-in tasking services that the debugger supports.

  Within the debugger, the term task denotes such a flow of control
  regardless of the language or implementation.  The debugger's tasking
  support applies to all such programs.

  The debugger lets you display task information and modify task
  characteristics to control task execution, priority, state transitions,
  and so on.

  The following paragraphs summarize the tasking features of the
  debugger's DECwindows Motif interface.  For more information about the
  debugger's tasking support, see the manual provided with this debugger.

  Displaying Information about Tasks:

  To display information about one or more tasks of your program, choose
  Views...  from the Options menu on the main or optional view window.
  When the Views dialog box appears, toggle tasking view.

  The tasking view gives information about all currently existing
  (nonterminated) tasks of your program.  The information is updated
  whenever the debugger regains control from the program.

  The displayed information includes:

   -  The task ID.  The arrow in the left column marks the active
      task---the task that runs when you click on the Go or Step push
      button.

   -  The task priority.

   -  Whether the task has been put on hold.

   -  The current state of the task.  The task in the RUN (running) state
      is the active task.

   -  The current substate of the task.  The substate helps indicate the
      possible cause of a task's state.

   -  A debugger path name for the task (thread) object or the address of
      the task object if the debugger cannot symbolize the task object.

  Changing Task Characteristics:

  To modify a task's characteristics or the tasking environment while
  debugging, choose one of the following items from the Tasks menu on the
  optional view window:

  Action      Function
  ------      --------

  Abort       Requests that the selected task be terminated at the
              next allowed opportunity. The exact effect depends
              on the current event facility (language dependent).
              For Ada tasks, this is equivalent to executing an
              abort statement.

  Activate    Makes the selected task the active task.

  Hold        Places the selected task on hold.

  Nohold      Releases the selected task from hold.

  Make        Makes the selected task the visible task.
    Visible

  All ->      Uses the submenu to:
                 Abort all tasks
                 Release all tasks from hold

  To save these modifications for subsequent debugger sessions, choose
  Save Options from the Options menu on the main or optional view window.
  This creates a new version of the debugger resource file with the new
  definitions.