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------------------------------------------------------------------------------

--                                                                          --

--                  GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                --

--                                                                          --

--                  S Y S T E M . T A S K I N G . D E B U G                 --

--                                                                          --

--                                  S p e c                                 --

--                                                                          --

--          Copyright (C) 1997-2011, Free Software Foundation, Inc.         --

--                                                                          --

-- GNARL is free software; you can  redistribute it  and/or modify it under --

-- terms of the  GNU General Public License as published  by the Free Soft- --

-- ware  Foundation;  either version 3,  or (at your option) any later ver- --

-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --

-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --

-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --

--                                                                          --

-- As a special exception under Section 7 of GPL version 3, you are granted --

-- additional permissions described in the GCC Runtime Library Exception,   --

-- version 3.1, as published by the Free Software Foundation.               --

--                                                                          --

-- You should have received a copy of the GNU General Public License and    --

-- a copy of the GCC Runtime Library Exception along with this program;     --

-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --

-- <http://www.gnu.org/licenses/>.                                          --

--                                                                          --

-- GNARL was developed by the GNARL team at Florida State University.       --

-- Extensive contributions were provided by Ada Core Technologies, Inc.     --

--                                                                          --

------------------------------------------------------------------------------

--  This package encapsulates all direct interfaces to task debugging services

--  that are needed by gdb with gnat mode.

with System.Tasking;

with System.OS_Interface;

package System.Tasking.Debug is

   pragma Preelaborate;

   ------------------------------------------

   -- Application-level debugging routines --

   ------------------------------------------

   procedure List_Tasks;

   --  Print a list of all the known Ada tasks with abbreviated state

   --  information, one-per-line, to the standard error file.

   procedure Print_Current_Task;

   --  Write information about current task, in hexadecimal, as one line, to

   --  the standard error file.

   procedure Print_Task_Info (T : Task_Id);

   --  Similar to Print_Current_Task, for a given task

   procedure Set_User_State (Value : Long_Integer);

   --  Set user state value in the current task. This state will be displayed

   --  when calling List_Tasks or Print_Current_Task. It is useful for setting

   --  task specific state.

   function Get_User_State return Long_Integer;

   --  Return the user state for the current task

   -------------------------

   -- General GDB support --

   -------------------------

   Known_Tasks : array (0 .. 999) of Task_Id := (others => null);

   --  Global array of tasks read by gdb, and updated by Create_Task and

   --  Finalize_TCB

   Debug_Event_Activating           : constant := 1;

   Debug_Event_Run                  : constant := 2;

   Debug_Event_Suspended            : constant := 3;

   Debug_Event_Preempted            : constant := 4;

   Debug_Event_Terminated           : constant := 5;

   Debug_Event_Abort_Terminated     : constant := 6;

   Debug_Event_Exception_Terminated : constant := 7;

   Debug_Event_Rendezvous_Exception : constant := 8;

   Debug_Event_Handled              : constant := 9;

   Debug_Event_Dependents_Exception : constant := 10;

   Debug_Event_Handled_Others       : constant := 11;

   subtype Event_Kind_Type is Positive range 1 .. 11;

   --  Event kinds currently defined for debugging, used globally

   --  below and on a per task basis.

   procedure Signal_Debug_Event

     (Event_Kind : Event_Kind_Type;

      Task_Value : Task_Id);

   ----------------------------------

   -- VxWorks specific GDB support --

   ----------------------------------

   --  Although the following routines are implemented in a target independent

   --  manner, only VxWorks currently uses them.

   procedure Task_Creation_Hook (Thread : OS_Interface.Thread_Id);

   --  This procedure is used to notify GDB of task's creation. It must be

   --  called by the task's creator.

   procedure Task_Termination_Hook;

   --  This procedure is used to notify GDB of task's termination

   procedure Suspend_All_Tasks (Thread_Self : OS_Interface.Thread_Id);

   --  Suspend all the tasks except the one whose associated thread is

   --  Thread_Self by traversing All_Tasks_Lists and calling

   --  System.Task_Primitives.Operations.Suspend_Task.

   procedure Resume_All_Tasks (Thread_Self : OS_Interface.Thread_Id);

   --  Resume all the tasks except the one whose associated thread is

   --  Thread_Self by traversing All_Tasks_Lists and calling

   --  System.Task_Primitives.Operations.Continue_Task.

   procedure Stop_All_Tasks_Handler;

   --  Stop all the tasks by traversing All_Tasks_Lists and calling

   --  System.Task_Primitives.Operations.Stop_All_Task. This function

   --  can be used in an interrupt handler.

   procedure Stop_All_Tasks;

   --  Stop all the tasks by traversing All_Tasks_Lists and calling

   --  System.Task_Primitives.Operations.Stop_Task.

   procedure Continue_All_Tasks;

   --  Continue all the tasks by traversing All_Tasks_Lists and calling

   --  System.Task_Primitives.Operations.Continue_Task.

   -------------------------------

   -- Run-time tracing routines --

   -------------------------------

   procedure Trace

     (Self_Id  : Task_Id;

      Msg      : String;

      Flag     : Character;

      Other_Id : Task_Id := null);

   --  If traces for Flag are enabled, display on Standard_Error a given

   --  message for the current task. Other_Id is an optional second task id

   --  to display.

   procedure Set_Trace

     (Flag  : Character;

      Value : Boolean := True);

   --  Enable or disable tracing for Flag. By default, flags in the range

   --  'A' .. 'Z' are disabled, others are enabled.

end System.Tasking.Debug;