373 lines
9.9 KiB
Ada
373 lines
9.9 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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-- --
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-- S Y S T E M . T A S K I N G . D E B U G --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1997-2009, Free Software Foundation, Inc. --
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-- --
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-- GNARL is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNARL was developed by the GNARL team at Florida State University. --
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-- Extensive contributions were provided by Ada Core Technologies, Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This package encapsulates all direct interfaces to task debugging services
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-- that are needed by gdb with gnat mode.
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-- Note : This file *must* be compiled with debugging information
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-- Do not add any dependency to GNARL packages since this package is used
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-- in both normal and restricted (ravenscar) environments.
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with System.CRTL;
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with System.Task_Primitives;
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with System.Task_Primitives.Operations;
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with Ada.Unchecked_Conversion;
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package body System.Tasking.Debug is
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package STPO renames System.Task_Primitives.Operations;
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function To_Integer is new
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Ada.Unchecked_Conversion (Task_Id, System.Task_Primitives.Task_Address);
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type Trace_Flag_Set is array (Character) of Boolean;
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Trace_On : Trace_Flag_Set := ('A' .. 'Z' => False, others => True);
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-----------------------
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-- Local Subprograms --
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-----------------------
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procedure Write (Fd : Integer; S : String; Count : Integer);
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procedure Put (S : String);
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-- Display S on standard output
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procedure Put_Line (S : String := "");
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-- Display S on standard output with an additional line terminator
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------------------------
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-- Continue_All_Tasks --
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------------------------
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procedure Continue_All_Tasks is
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C : Task_Id;
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Dummy : Boolean;
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pragma Unreferenced (Dummy);
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begin
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STPO.Lock_RTS;
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C := All_Tasks_List;
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while C /= null loop
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Dummy := STPO.Continue_Task (C);
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C := C.Common.All_Tasks_Link;
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end loop;
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STPO.Unlock_RTS;
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end Continue_All_Tasks;
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--------------------
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-- Get_User_State --
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--------------------
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function Get_User_State return Long_Integer is
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begin
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return STPO.Self.User_State;
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end Get_User_State;
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----------------
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-- List_Tasks --
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----------------
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procedure List_Tasks is
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C : Task_Id;
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begin
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C := All_Tasks_List;
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while C /= null loop
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Print_Task_Info (C);
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C := C.Common.All_Tasks_Link;
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end loop;
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end List_Tasks;
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------------------------
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-- Print_Current_Task --
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------------------------
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procedure Print_Current_Task is
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begin
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Print_Task_Info (STPO.Self);
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end Print_Current_Task;
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---------------------
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-- Print_Task_Info --
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---------------------
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procedure Print_Task_Info (T : Task_Id) is
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Entry_Call : Entry_Call_Link;
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Parent : Task_Id;
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begin
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if T = null then
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Put_Line ("null task");
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return;
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end if;
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Put (T.Common.Task_Image (1 .. T.Common.Task_Image_Len) & ": " &
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Task_States'Image (T.Common.State));
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Parent := T.Common.Parent;
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if Parent = null then
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Put (", parent: <none>");
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else
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Put (", parent: " &
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Parent.Common.Task_Image (1 .. Parent.Common.Task_Image_Len));
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end if;
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Put (", prio:" & T.Common.Current_Priority'Img);
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if not T.Callable then
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Put (", not callable");
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end if;
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if T.Aborting then
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Put (", aborting");
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end if;
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if T.Deferral_Level /= 0 then
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Put (", abort deferred");
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end if;
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if T.Common.Call /= null then
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Entry_Call := T.Common.Call;
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Put (", serving:");
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while Entry_Call /= null loop
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Put (To_Integer (Entry_Call.Self)'Img);
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Entry_Call := Entry_Call.Acceptor_Prev_Call;
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end loop;
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end if;
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if T.Open_Accepts /= null then
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Put (", accepting:");
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for J in T.Open_Accepts'Range loop
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Put (T.Open_Accepts (J).S'Img);
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end loop;
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if T.Terminate_Alternative then
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Put (" or terminate");
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end if;
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end if;
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if T.User_State /= 0 then
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Put (", state:" & T.User_State'Img);
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end if;
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Put_Line;
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end Print_Task_Info;
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---------
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-- Put --
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---------
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procedure Put (S : String) is
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begin
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Write (2, S, S'Length);
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end Put;
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--------------
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-- Put_Line --
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--------------
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procedure Put_Line (S : String := "") is
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begin
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Write (2, S & ASCII.LF, S'Length + 1);
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end Put_Line;
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----------------------
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-- Resume_All_Tasks --
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----------------------
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procedure Resume_All_Tasks (Thread_Self : OS_Interface.Thread_Id) is
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C : Task_Id;
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Dummy : Boolean;
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pragma Unreferenced (Dummy);
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begin
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STPO.Lock_RTS;
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C := All_Tasks_List;
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while C /= null loop
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Dummy := STPO.Resume_Task (C, Thread_Self);
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C := C.Common.All_Tasks_Link;
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end loop;
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STPO.Unlock_RTS;
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end Resume_All_Tasks;
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---------------
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-- Set_Trace --
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---------------
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procedure Set_Trace (Flag : Character; Value : Boolean := True) is
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begin
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Trace_On (Flag) := Value;
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end Set_Trace;
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--------------------
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-- Set_User_State --
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--------------------
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procedure Set_User_State (Value : Long_Integer) is
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begin
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STPO.Self.User_State := Value;
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end Set_User_State;
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------------------------
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-- Signal_Debug_Event --
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------------------------
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procedure Signal_Debug_Event
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(Event_Kind : Event_Kind_Type;
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Task_Value : Task_Id)
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is
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begin
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null;
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end Signal_Debug_Event;
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--------------------
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-- Stop_All_Tasks --
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--------------------
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procedure Stop_All_Tasks is
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C : Task_Id;
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Dummy : Boolean;
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pragma Unreferenced (Dummy);
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begin
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STPO.Lock_RTS;
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C := All_Tasks_List;
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while C /= null loop
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Dummy := STPO.Stop_Task (C);
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C := C.Common.All_Tasks_Link;
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end loop;
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STPO.Unlock_RTS;
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end Stop_All_Tasks;
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----------------------------
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-- Stop_All_Tasks_Handler --
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----------------------------
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procedure Stop_All_Tasks_Handler is
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begin
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STPO.Stop_All_Tasks;
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end Stop_All_Tasks_Handler;
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-----------------------
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-- Suspend_All_Tasks --
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-----------------------
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procedure Suspend_All_Tasks (Thread_Self : OS_Interface.Thread_Id) is
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C : Task_Id;
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Dummy : Boolean;
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pragma Unreferenced (Dummy);
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begin
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STPO.Lock_RTS;
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C := All_Tasks_List;
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while C /= null loop
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Dummy := STPO.Suspend_Task (C, Thread_Self);
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C := C.Common.All_Tasks_Link;
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end loop;
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STPO.Unlock_RTS;
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end Suspend_All_Tasks;
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------------------------
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-- Task_Creation_Hook --
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------------------------
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procedure Task_Creation_Hook (Thread : OS_Interface.Thread_Id) is
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pragma Inspection_Point (Thread);
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-- gdb needs to access the thread parameter in order to implement
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-- the multitask mode under VxWorks.
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begin
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null;
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end Task_Creation_Hook;
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---------------------------
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-- Task_Termination_Hook --
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---------------------------
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procedure Task_Termination_Hook is
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begin
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null;
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end Task_Termination_Hook;
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-----------
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-- Trace --
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-----------
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procedure Trace
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(Self_Id : Task_Id;
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Msg : String;
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Flag : Character;
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Other_Id : Task_Id := null)
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is
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begin
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if Trace_On (Flag) then
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Put (To_Integer (Self_Id)'Img &
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':' & Flag & ':' &
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Self_Id.Common.Task_Image (1 .. Self_Id.Common.Task_Image_Len) &
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':');
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if Other_Id /= null then
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Put (To_Integer (Other_Id)'Img & ':');
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end if;
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Put_Line (Msg);
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end if;
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end Trace;
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-----------
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-- Write --
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-----------
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procedure Write (Fd : Integer; S : String; Count : Integer) is
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Discard : Integer;
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pragma Unreferenced (Discard);
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begin
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Discard := System.CRTL.write (Fd, S (S'First)'Address, Count);
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-- Is it really right to ignore write errors here ???
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end Write;
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end System.Tasking.Debug;
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