| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- |
| -- -- |
| -- S Y S T E M . T A S K I N G . D E B U G -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 1997-2005 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 2, or (at your option) any later ver- -- |
| -- sion. GNARL 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. See the GNU General Public License -- |
| -- for more details. You should have received a copy of the GNU General -- |
| -- Public License distributed with GNARL; see file COPYING. If not, write -- |
| -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- |
| -- Boston, MA 02110-1301, USA. -- |
| -- -- |
| -- As a special exception, if other files instantiate generics from this -- |
| -- unit, or you link this unit with other files to produce an executable, -- |
| -- this unit does not by itself cause the resulting executable to be -- |
| -- covered by the GNU General Public License. This exception does not -- |
| -- however invalidate any other reasons why the executable file might be -- |
| -- covered by the GNU Public License. -- |
| -- -- |
| -- 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. |
| |
| -- Note : This file *must* be compiled with debugging information |
| |
| -- Do not add any dependency to GNARL packages since this package is used |
| -- in both normal and restricted (ravenscar) environments. |
| |
| with System.CRTL; |
| with System.Task_Primitives.Operations; |
| with Unchecked_Conversion; |
| |
| package body System.Tasking.Debug is |
| |
| package STPO renames System.Task_Primitives.Operations; |
| |
| function To_Integer is new |
| Unchecked_Conversion (Task_Id, System.Address); |
| |
| type Trace_Flag_Set is array (Character) of Boolean; |
| |
| Trace_On : Trace_Flag_Set := ('A' .. 'Z' => False, others => True); |
| |
| ----------------------- |
| -- Local Subprograms -- |
| ----------------------- |
| |
| procedure Write (Fd : Integer; S : String; Count : Integer); |
| |
| procedure Put (S : String); |
| -- Display S on standard output. |
| |
| procedure Put_Line (S : String := ""); |
| -- Display S on standard output with an additional line terminator. |
| |
| -------------------- |
| -- Get_User_State -- |
| -------------------- |
| |
| function Get_User_State return Long_Integer is |
| begin |
| return STPO.Self.User_State; |
| end Get_User_State; |
| |
| ---------------- |
| -- List_Tasks -- |
| ---------------- |
| |
| procedure List_Tasks is |
| C : Task_Id; |
| begin |
| C := All_Tasks_List; |
| |
| while C /= null loop |
| Print_Task_Info (C); |
| C := C.Common.All_Tasks_Link; |
| end loop; |
| end List_Tasks; |
| |
| ------------------------ |
| -- Print_Current_Task -- |
| ------------------------ |
| |
| procedure Print_Current_Task is |
| begin |
| Print_Task_Info (STPO.Self); |
| end Print_Current_Task; |
| |
| --------------------- |
| -- Print_Task_Info -- |
| --------------------- |
| |
| procedure Print_Task_Info (T : Task_Id) is |
| Entry_Call : Entry_Call_Link; |
| Parent : Task_Id; |
| |
| begin |
| if T = null then |
| Put_Line ("null task"); |
| return; |
| end if; |
| |
| Put (T.Common.Task_Image (1 .. T.Common.Task_Image_Len) & ": " & |
| Task_States'Image (T.Common.State)); |
| |
| Parent := T.Common.Parent; |
| |
| if Parent = null then |
| Put (", parent: <none>"); |
| else |
| Put (", parent: " & |
| Parent.Common.Task_Image (1 .. Parent.Common.Task_Image_Len)); |
| end if; |
| |
| Put (", prio:" & T.Common.Current_Priority'Img); |
| |
| if not T.Callable then |
| Put (", not callable"); |
| end if; |
| |
| if T.Aborting then |
| Put (", aborting"); |
| end if; |
| |
| if T.Deferral_Level /= 0 then |
| Put (", abort deferred"); |
| end if; |
| |
| if T.Common.Call /= null then |
| Entry_Call := T.Common.Call; |
| Put (", serving:"); |
| |
| while Entry_Call /= null loop |
| Put (To_Integer (Entry_Call.Self)'Img); |
| Entry_Call := Entry_Call.Acceptor_Prev_Call; |
| end loop; |
| end if; |
| |
| if T.Open_Accepts /= null then |
| Put (", accepting:"); |
| |
| for J in T.Open_Accepts'Range loop |
| Put (T.Open_Accepts (J).S'Img); |
| end loop; |
| |
| if T.Terminate_Alternative then |
| Put (" or terminate"); |
| end if; |
| end if; |
| |
| if T.User_State /= 0 then |
| Put (", state:" & T.User_State'Img); |
| end if; |
| |
| Put_Line; |
| end Print_Task_Info; |
| |
| --------- |
| -- Put -- |
| --------- |
| |
| procedure Put (S : String) is |
| begin |
| Write (2, S, S'Length); |
| end Put; |
| |
| -------------- |
| -- Put_Line -- |
| -------------- |
| |
| procedure Put_Line (S : String := "") is |
| begin |
| Write (2, S & ASCII.LF, S'Length + 1); |
| end Put_Line; |
| |
| ---------------------- |
| -- Resume_All_Tasks -- |
| ---------------------- |
| |
| procedure Resume_All_Tasks (Thread_Self : OS_Interface.Thread_Id) is |
| C : Task_Id; |
| Dummy : Boolean; |
| pragma Unreferenced (Dummy); |
| |
| begin |
| STPO.Lock_RTS; |
| C := All_Tasks_List; |
| |
| while C /= null loop |
| Dummy := STPO.Resume_Task (C, Thread_Self); |
| C := C.Common.All_Tasks_Link; |
| end loop; |
| |
| STPO.Unlock_RTS; |
| end Resume_All_Tasks; |
| |
| --------------- |
| -- Set_Trace -- |
| --------------- |
| |
| procedure Set_Trace (Flag : Character; Value : Boolean := True) is |
| begin |
| Trace_On (Flag) := Value; |
| end Set_Trace; |
| |
| -------------------- |
| -- Set_User_State -- |
| -------------------- |
| |
| procedure Set_User_State (Value : Long_Integer) is |
| begin |
| STPO.Self.User_State := Value; |
| end Set_User_State; |
| |
| ----------------------- |
| -- Suspend_All_Tasks -- |
| ----------------------- |
| |
| procedure Suspend_All_Tasks (Thread_Self : OS_Interface.Thread_Id) is |
| C : Task_Id; |
| Dummy : Boolean; |
| pragma Unreferenced (Dummy); |
| |
| begin |
| STPO.Lock_RTS; |
| C := All_Tasks_List; |
| |
| while C /= null loop |
| Dummy := STPO.Suspend_Task (C, Thread_Self); |
| C := C.Common.All_Tasks_Link; |
| end loop; |
| |
| STPO.Unlock_RTS; |
| end Suspend_All_Tasks; |
| |
| ------------------------ |
| -- Task_Creation_Hook -- |
| ------------------------ |
| |
| procedure Task_Creation_Hook (Thread : OS_Interface.Thread_Id) is |
| pragma Inspection_Point (Thread); |
| -- gdb needs to access the thread parameter in order to implement |
| -- the multitask mode under VxWorks. |
| |
| begin |
| null; |
| end Task_Creation_Hook; |
| |
| --------------------------- |
| -- Task_Termination_Hook -- |
| --------------------------- |
| |
| procedure Task_Termination_Hook is |
| begin |
| null; |
| end Task_Termination_Hook; |
| |
| ----------- |
| -- Trace -- |
| ----------- |
| |
| procedure Trace |
| (Self_Id : Task_Id; |
| Msg : String; |
| Flag : Character; |
| Other_Id : Task_Id := null) |
| is |
| begin |
| if Trace_On (Flag) then |
| Put (To_Integer (Self_Id)'Img & |
| ':' & Flag & ':' & |
| Self_Id.Common.Task_Image (1 .. Self_Id.Common.Task_Image_Len) & |
| ':'); |
| |
| if Other_Id /= null then |
| Put (To_Integer (Other_Id)'Img & ':'); |
| end if; |
| |
| Put_Line (Msg); |
| end if; |
| end Trace; |
| |
| ----------- |
| -- Write -- |
| ----------- |
| |
| procedure Write (Fd : Integer; S : String; Count : Integer) is |
| Discard : Integer; |
| pragma Unreferenced (Discard); |
| begin |
| Discard := System.CRTL.write (Fd, S (S'First)'Address, Count); |
| -- Is it really right to ignore write errors here ??? |
| end Write; |
| |
| end System.Tasking.Debug; |
