1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
5 -- S Y S T E M . T A S K I N G . D E B U G --
9 -- Copyright (C) 1997-2009, Free Software Foundation, Inc. --
11 -- GNARL is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
18 -- As a special exception under Section 7 of GPL version 3, you are granted --
19 -- additional permissions described in the GCC Runtime Library Exception, --
20 -- version 3.1, as published by the Free Software Foundation. --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
27 -- GNARL was developed by the GNARL team at Florida State University. --
28 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
30 ------------------------------------------------------------------------------
32 -- This package encapsulates all direct interfaces to task debugging services
33 -- that are needed by gdb with gnat mode.
35 -- Note : This file *must* be compiled with debugging information
37 -- Do not add any dependency to GNARL packages since this package is used
38 -- in both normal and restricted (ravenscar) environments.
41 with System.Task_Primitives;
42 with System.Task_Primitives.Operations;
43 with Ada.Unchecked_Conversion;
45 package body System.Tasking.Debug is
47 package STPO renames System.Task_Primitives.Operations;
49 function To_Integer is new
50 Ada.Unchecked_Conversion (Task_Id, System.Task_Primitives.Task_Address);
52 type Trace_Flag_Set is array (Character) of Boolean;
54 Trace_On : Trace_Flag_Set := ('A' .. 'Z' => False, others => True);
56 -----------------------
57 -- Local Subprograms --
58 -----------------------
60 procedure Write (Fd : Integer; S : String; Count : Integer);
62 procedure Put (S : String);
63 -- Display S on standard output
65 procedure Put_Line (S : String := "");
66 -- Display S on standard output with an additional line terminator
68 ------------------------
69 -- Continue_All_Tasks --
70 ------------------------
72 procedure Continue_All_Tasks is
76 pragma Unreferenced (Dummy);
83 Dummy := STPO.Continue_Task (C);
84 C := C.Common.All_Tasks_Link;
88 end Continue_All_Tasks;
94 function Get_User_State return Long_Integer is
96 return STPO.Self.User_State;
103 procedure List_Tasks is
110 C := C.Common.All_Tasks_Link;
114 ------------------------
115 -- Print_Current_Task --
116 ------------------------
118 procedure Print_Current_Task is
120 Print_Task_Info (STPO.Self);
121 end Print_Current_Task;
123 ---------------------
124 -- Print_Task_Info --
125 ---------------------
127 procedure Print_Task_Info (T : Task_Id) is
128 Entry_Call : Entry_Call_Link;
133 Put_Line ("null task");
137 Put (T.Common.Task_Image (1 .. T.Common.Task_Image_Len) & ": " &
138 Task_States'Image (T.Common.State));
140 Parent := T.Common.Parent;
142 if Parent = null then
143 Put (", parent: <none>");
146 Parent.Common.Task_Image (1 .. Parent.Common.Task_Image_Len));
149 Put (", prio:" & T.Common.Current_Priority'Img);
151 if not T.Callable then
152 Put (", not callable");
159 if T.Deferral_Level /= 0 then
160 Put (", abort deferred");
163 if T.Common.Call /= null then
164 Entry_Call := T.Common.Call;
167 while Entry_Call /= null loop
168 Put (To_Integer (Entry_Call.Self)'Img);
169 Entry_Call := Entry_Call.Acceptor_Prev_Call;
173 if T.Open_Accepts /= null then
174 Put (", accepting:");
176 for J in T.Open_Accepts'Range loop
177 Put (T.Open_Accepts (J).S'Img);
180 if T.Terminate_Alternative then
181 Put (" or terminate");
185 if T.User_State /= 0 then
186 Put (", state:" & T.User_State'Img);
196 procedure Put (S : String) is
198 Write (2, S, S'Length);
205 procedure Put_Line (S : String := "") is
207 Write (2, S & ASCII.LF, S'Length + 1);
210 ----------------------
211 -- Resume_All_Tasks --
212 ----------------------
214 procedure Resume_All_Tasks (Thread_Self : OS_Interface.Thread_Id) is
217 pragma Unreferenced (Dummy);
224 Dummy := STPO.Resume_Task (C, Thread_Self);
225 C := C.Common.All_Tasks_Link;
229 end Resume_All_Tasks;
235 procedure Set_Trace (Flag : Character; Value : Boolean := True) is
237 Trace_On (Flag) := Value;
244 procedure Set_User_State (Value : Long_Integer) is
246 STPO.Self.User_State := Value;
253 procedure Stop_All_Tasks is
257 pragma Unreferenced (Dummy);
264 Dummy := STPO.Stop_Task (C);
265 C := C.Common.All_Tasks_Link;
271 ----------------------------
272 -- Stop_All_Tasks_Handler --
273 ----------------------------
275 procedure Stop_All_Tasks_Handler is
278 end Stop_All_Tasks_Handler;
280 -----------------------
281 -- Suspend_All_Tasks --
282 -----------------------
284 procedure Suspend_All_Tasks (Thread_Self : OS_Interface.Thread_Id) is
287 pragma Unreferenced (Dummy);
294 Dummy := STPO.Suspend_Task (C, Thread_Self);
295 C := C.Common.All_Tasks_Link;
299 end Suspend_All_Tasks;
301 ------------------------
302 -- Task_Creation_Hook --
303 ------------------------
305 procedure Task_Creation_Hook (Thread : OS_Interface.Thread_Id) is
306 pragma Inspection_Point (Thread);
307 -- gdb needs to access the thread parameter in order to implement
308 -- the multitask mode under VxWorks.
312 end Task_Creation_Hook;
314 ---------------------------
315 -- Task_Termination_Hook --
316 ---------------------------
318 procedure Task_Termination_Hook is
321 end Task_Termination_Hook;
331 Other_Id : Task_Id := null)
334 if Trace_On (Flag) then
335 Put (To_Integer (Self_Id)'Img &
337 Self_Id.Common.Task_Image (1 .. Self_Id.Common.Task_Image_Len) &
340 if Other_Id /= null then
341 Put (To_Integer (Other_Id)'Img & ':');
352 procedure Write (Fd : Integer; S : String; Count : Integer) is
354 pragma Unreferenced (Discard);
356 Discard := System.CRTL.write (Fd, S (S'First)'Address, Count);
357 -- Is it really right to ignore write errors here ???
360 end System.Tasking.Debug;