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) 1997-2008, 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 2, or (at your option) any later ver- --
14 -- sion. GNARL 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. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNARL; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNARL was developed by the GNARL team at Florida State University. --
30 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
32 ------------------------------------------------------------------------------
34 -- This package encapsulates all direct interfaces to task debugging services
35 -- that are needed by gdb with gnat mode.
37 -- Note : This file *must* be compiled with debugging information
39 -- Do not add any dependency to GNARL packages since this package is used
40 -- in both normal and restricted (ravenscar) environments.
43 with System.Task_Primitives;
44 with System.Task_Primitives.Operations;
45 with Ada.Unchecked_Conversion;
47 package body System.Tasking.Debug is
49 package STPO renames System.Task_Primitives.Operations;
51 function To_Integer is new
52 Ada.Unchecked_Conversion (Task_Id, System.Task_Primitives.Task_Address);
54 type Trace_Flag_Set is array (Character) of Boolean;
56 Trace_On : Trace_Flag_Set := ('A' .. 'Z' => False, others => True);
58 -----------------------
59 -- Local Subprograms --
60 -----------------------
62 procedure Write (Fd : Integer; S : String; Count : Integer);
64 procedure Put (S : String);
65 -- Display S on standard output
67 procedure Put_Line (S : String := "");
68 -- Display S on standard output with an additional line terminator
70 ------------------------
71 -- Continue_All_Tasks --
72 ------------------------
74 procedure Continue_All_Tasks is
78 pragma Unreferenced (Dummy);
85 Dummy := STPO.Continue_Task (C);
86 C := C.Common.All_Tasks_Link;
90 end Continue_All_Tasks;
96 function Get_User_State return Long_Integer is
98 return STPO.Self.User_State;
105 procedure List_Tasks is
112 C := C.Common.All_Tasks_Link;
116 ------------------------
117 -- Print_Current_Task --
118 ------------------------
120 procedure Print_Current_Task is
122 Print_Task_Info (STPO.Self);
123 end Print_Current_Task;
125 ---------------------
126 -- Print_Task_Info --
127 ---------------------
129 procedure Print_Task_Info (T : Task_Id) is
130 Entry_Call : Entry_Call_Link;
135 Put_Line ("null task");
139 Put (T.Common.Task_Image (1 .. T.Common.Task_Image_Len) & ": " &
140 Task_States'Image (T.Common.State));
142 Parent := T.Common.Parent;
144 if Parent = null then
145 Put (", parent: <none>");
148 Parent.Common.Task_Image (1 .. Parent.Common.Task_Image_Len));
151 Put (", prio:" & T.Common.Current_Priority'Img);
153 if not T.Callable then
154 Put (", not callable");
161 if T.Deferral_Level /= 0 then
162 Put (", abort deferred");
165 if T.Common.Call /= null then
166 Entry_Call := T.Common.Call;
169 while Entry_Call /= null loop
170 Put (To_Integer (Entry_Call.Self)'Img);
171 Entry_Call := Entry_Call.Acceptor_Prev_Call;
175 if T.Open_Accepts /= null then
176 Put (", accepting:");
178 for J in T.Open_Accepts'Range loop
179 Put (T.Open_Accepts (J).S'Img);
182 if T.Terminate_Alternative then
183 Put (" or terminate");
187 if T.User_State /= 0 then
188 Put (", state:" & T.User_State'Img);
198 procedure Put (S : String) is
200 Write (2, S, S'Length);
207 procedure Put_Line (S : String := "") is
209 Write (2, S & ASCII.LF, S'Length + 1);
212 ----------------------
213 -- Resume_All_Tasks --
214 ----------------------
216 procedure Resume_All_Tasks (Thread_Self : OS_Interface.Thread_Id) is
219 pragma Unreferenced (Dummy);
226 Dummy := STPO.Resume_Task (C, Thread_Self);
227 C := C.Common.All_Tasks_Link;
231 end Resume_All_Tasks;
237 procedure Set_Trace (Flag : Character; Value : Boolean := True) is
239 Trace_On (Flag) := Value;
246 procedure Set_User_State (Value : Long_Integer) is
248 STPO.Self.User_State := Value;
255 procedure Stop_All_Tasks is
259 pragma Unreferenced (Dummy);
266 Dummy := STPO.Stop_Task (C);
267 C := C.Common.All_Tasks_Link;
273 ----------------------------
274 -- Stop_All_Tasks_Handler --
275 ----------------------------
277 procedure Stop_All_Tasks_Handler is
280 end Stop_All_Tasks_Handler;
282 -----------------------
283 -- Suspend_All_Tasks --
284 -----------------------
286 procedure Suspend_All_Tasks (Thread_Self : OS_Interface.Thread_Id) is
289 pragma Unreferenced (Dummy);
296 Dummy := STPO.Suspend_Task (C, Thread_Self);
297 C := C.Common.All_Tasks_Link;
301 end Suspend_All_Tasks;
303 ------------------------
304 -- Task_Creation_Hook --
305 ------------------------
307 procedure Task_Creation_Hook (Thread : OS_Interface.Thread_Id) is
308 pragma Inspection_Point (Thread);
309 -- gdb needs to access the thread parameter in order to implement
310 -- the multitask mode under VxWorks.
314 end Task_Creation_Hook;
316 ---------------------------
317 -- Task_Termination_Hook --
318 ---------------------------
320 procedure Task_Termination_Hook is
323 end Task_Termination_Hook;
333 Other_Id : Task_Id := null)
336 if Trace_On (Flag) then
337 Put (To_Integer (Self_Id)'Img &
339 Self_Id.Common.Task_Image (1 .. Self_Id.Common.Task_Image_Len) &
342 if Other_Id /= null then
343 Put (To_Integer (Other_Id)'Img & ':');
354 procedure Write (Fd : Integer; S : String; Count : Integer) is
356 pragma Unreferenced (Discard);
358 Discard := System.CRTL.write (Fd, S (S'First)'Address, Count);
359 -- Is it really right to ignore write errors here ???
362 end System.Tasking.Debug;