471 lines
12 KiB
Ada
471 lines
12 KiB
Ada
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------------------------------------------------------------------------------
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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) 1997-2014, 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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pragma Restriction_Warnings (No_Secondary_Stack);
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-- We wish to avoid secondary stack usage here, because (e.g.) Trace is called
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-- at delicate times, such as during task termination after the secondary
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-- stack has been deallocated. It's just a warning, so we don't require
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-- partition-wide consistency.
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with System.CRTL;
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with System.Storage_Elements; use System.Storage_Elements;
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with System.Task_Primitives;
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with System.Task_Primitives.Operations;
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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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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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Stderr_Fd : constant := 2;
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-- File descriptor for standard error
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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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-- Write Count characters of S to the file descriptor Fd
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procedure Put (S : String);
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-- Display S on standard error
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procedure Put_Line (S : String := "");
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-- Display S on standard error with an additional line terminator
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procedure Put_Task_Image (T : Task_Id);
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-- Display relevant characters from T.Common.Task_Image on standard error
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procedure Put_Task_Id_Image (T : Task_Id);
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-- Display address in hexadecimal form on standard error
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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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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_Task_Image (T);
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Put (": " & 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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Put_Task_Image (Parent);
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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_Task_Id_Image (Entry_Call.Self);
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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 (Stderr_Fd, 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 (Stderr_Fd, S & ASCII.LF, S'Length + 1);
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end Put_Line;
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-----------------------
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-- Put_Task_Id_Image --
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-----------------------
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procedure Put_Task_Id_Image (T : Task_Id) is
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Address_Image_Length : constant :=
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13 + (if Standard'Address_Size = 64 then 10 else 0);
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-- Length of string to be printed for address of task
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H : constant array (0 .. 15) of Character := "0123456789ABCDEF";
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-- Table of hex digits
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S : String (1 .. Address_Image_Length);
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P : Natural;
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N : Integer_Address;
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U : Natural := 0;
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begin
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if T = null then
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Put ("Null_Task_Id");
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else
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S (S'Last) := '#';
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P := Address_Image_Length - 1;
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N := To_Integer (T.all'Address);
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while P > 3 loop
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if U = 4 then
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S (P) := '_';
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P := P - 1;
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U := 1;
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else
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U := U + 1;
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end if;
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S (P) := H (Integer (N mod 16));
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P := P - 1;
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N := N / 16;
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end loop;
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S (1 .. 3) := "16#";
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Put (S);
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end if;
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end Put_Task_Id_Image;
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--------------------
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-- Put_Task_Image --
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--------------------
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procedure Put_Task_Image (T : Task_Id) is
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begin
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-- In case T.Common.Task_Image_Len is uninitialized junk, we check that
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-- it is in range, to make this more robust.
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if T.Common.Task_Image_Len in T.Common.Task_Image'Range then
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Put (T.Common.Task_Image (1 .. T.Common.Task_Image_Len));
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else
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Put (T.Common.Task_Image);
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end if;
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end Put_Task_Image;
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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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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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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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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_Task_Id_Image (Self_Id);
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Put (":" & Flag & ":");
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Put_Task_Image (Self_Id);
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Put (":");
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if Other_Id /= null then
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Put_Task_Id_Image (Other_Id);
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Put (":");
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end if;
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Put_Line (Msg);
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end if;
|
||
|
|
end Trace;
|
||
|
|
|
||
|
|
-----------
|
||
|
|
-- Write --
|
||
|
|
-----------
|
||
|
|
|
||
|
|
procedure Write (Fd : Integer; S : String; Count : Integer) is
|
||
|
|
Discard : System.CRTL.ssize_t;
|
||
|
|
-- Ignore write errors here; this is just debugging output, and there's
|
||
|
|
-- nothing to be done about errors anyway.
|
||
|
|
begin
|
||
|
|
Discard :=
|
||
|
|
System.CRTL.write
|
||
|
|
(Fd, S'Address, System.CRTL.size_t (Count));
|
||
|
|
end Write;
|
||
|
|
|
||
|
|
-----------------
|
||
|
|
-- Master_Hook --
|
||
|
|
-----------------
|
||
|
|
|
||
|
|
procedure Master_Hook
|
||
|
|
(Dependent : Task_Id;
|
||
|
|
Parent : Task_Id;
|
||
|
|
Master_Level : Integer)
|
||
|
|
is
|
||
|
|
pragma Inspection_Point (Dependent);
|
||
|
|
pragma Inspection_Point (Parent);
|
||
|
|
pragma Inspection_Point (Master_Level);
|
||
|
|
begin
|
||
|
|
null;
|
||
|
|
end Master_Hook;
|
||
|
|
|
||
|
|
---------------------------
|
||
|
|
-- Master_Completed_Hook --
|
||
|
|
---------------------------
|
||
|
|
|
||
|
|
procedure Master_Completed_Hook
|
||
|
|
(Self_ID : Task_Id;
|
||
|
|
Master_Level : Integer)
|
||
|
|
is
|
||
|
|
pragma Inspection_Point (Self_ID);
|
||
|
|
pragma Inspection_Point (Master_Level);
|
||
|
|
begin
|
||
|
|
null;
|
||
|
|
end Master_Completed_Hook;
|
||
|
|
|
||
|
|
end System.Tasking.Debug;
|