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[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [gcc/] [ada/] [s-tasdeb.adb] - Blame information for rev 847

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1 281 jeremybenn
------------------------------------------------------------------------------
2
--                                                                          --
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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                 --
6
--                                                                          --
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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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------------------------------------------------------------------------------
31
 
32
--  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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35
--  Note : This file *must* be compiled with debugging information
36
 
37
--  Do not add any dependency to GNARL packages since this package is used
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--  in both normal and restricted (ravenscar) environments.
39
 
40
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;
44
 
45
package body System.Tasking.Debug is
46
 
47
   package STPO renames System.Task_Primitives.Operations;
48
 
49
   function To_Integer is new
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     Ada.Unchecked_Conversion (Task_Id, System.Task_Primitives.Task_Address);
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52
   type Trace_Flag_Set is array (Character) of Boolean;
53
 
54
   Trace_On : Trace_Flag_Set := ('A' .. 'Z' => False, others => True);
55
 
56
   -----------------------
57
   -- Local Subprograms --
58
   -----------------------
59
 
60
   procedure Write (Fd : Integer; S : String; Count : Integer);
61
 
62
   procedure Put (S : String);
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   --  Display S on standard output
64
 
65
   procedure Put_Line (S : String := "");
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   --  Display S on standard output with an additional line terminator
67
 
68
   ------------------------
69
   -- Continue_All_Tasks --
70
   ------------------------
71
 
72
   procedure Continue_All_Tasks is
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      C : Task_Id;
74
 
75
      Dummy : Boolean;
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      pragma Unreferenced (Dummy);
77
 
78
   begin
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      STPO.Lock_RTS;
80
 
81
      C := All_Tasks_List;
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      while C /= null loop
83
         Dummy := STPO.Continue_Task (C);
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         C := C.Common.All_Tasks_Link;
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      end loop;
86
 
87
      STPO.Unlock_RTS;
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   end Continue_All_Tasks;
89
 
90
   --------------------
91
   -- Get_User_State --
92
   --------------------
93
 
94
   function Get_User_State return Long_Integer is
95
   begin
96
      return STPO.Self.User_State;
97
   end Get_User_State;
98
 
99
   ----------------
100
   -- List_Tasks --
101
   ----------------
102
 
103
   procedure List_Tasks is
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      C : Task_Id;
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   begin
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      C := All_Tasks_List;
107
 
108
      while C /= null loop
109
         Print_Task_Info (C);
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         C := C.Common.All_Tasks_Link;
111
      end loop;
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   end List_Tasks;
113
 
114
   ------------------------
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   -- Print_Current_Task --
116
   ------------------------
117
 
118
   procedure Print_Current_Task is
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   begin
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      Print_Task_Info (STPO.Self);
121
   end Print_Current_Task;
122
 
123
   ---------------------
124
   -- Print_Task_Info --
125
   ---------------------
126
 
127
   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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131
   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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137
      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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140
      Parent := T.Common.Parent;
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142
      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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151
      if not T.Callable then
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         Put (", not callable");
153
      end if;
154
 
155
      if T.Aborting then
156
         Put (", aborting");
157
      end if;
158
 
159
      if T.Deferral_Level /= 0 then
160
         Put (", abort deferred");
161
      end if;
162
 
163
      if T.Common.Call /= null then
164
         Entry_Call := T.Common.Call;
165
         Put (", serving:");
166
 
167
         while Entry_Call /= null loop
168
            Put (To_Integer (Entry_Call.Self)'Img);
169
            Entry_Call := Entry_Call.Acceptor_Prev_Call;
170
         end loop;
171
      end if;
172
 
173
      if T.Open_Accepts /= null then
174
         Put (", accepting:");
175
 
176
         for J in T.Open_Accepts'Range loop
177
            Put (T.Open_Accepts (J).S'Img);
178
         end loop;
179
 
180
         if T.Terminate_Alternative then
181
            Put (" or terminate");
182
         end if;
183
      end if;
184
 
185
      if T.User_State /= 0 then
186
         Put (", state:" & T.User_State'Img);
187
      end if;
188
 
189
      Put_Line;
190
   end Print_Task_Info;
191
 
192
   ---------
193
   -- Put --
194
   ---------
195
 
196
   procedure Put (S : String) is
197
   begin
198
      Write (2, S, S'Length);
199
   end Put;
200
 
201
   --------------
202
   -- Put_Line --
203
   --------------
204
 
205
   procedure Put_Line (S : String := "") is
206
   begin
207
      Write (2, S & ASCII.LF, S'Length + 1);
208
   end Put_Line;
209
 
210
   ----------------------
211
   -- Resume_All_Tasks --
212
   ----------------------
213
 
214
   procedure Resume_All_Tasks (Thread_Self : OS_Interface.Thread_Id) is
215
      C     : Task_Id;
216
      Dummy : Boolean;
217
      pragma Unreferenced (Dummy);
218
 
219
   begin
220
      STPO.Lock_RTS;
221
      C := All_Tasks_List;
222
 
223
      while C /= null loop
224
         Dummy := STPO.Resume_Task (C, Thread_Self);
225
         C := C.Common.All_Tasks_Link;
226
      end loop;
227
 
228
      STPO.Unlock_RTS;
229
   end Resume_All_Tasks;
230
 
231
   ---------------
232
   -- Set_Trace --
233
   ---------------
234
 
235
   procedure Set_Trace (Flag  : Character; Value : Boolean := True) is
236
   begin
237
      Trace_On (Flag) := Value;
238
   end Set_Trace;
239
 
240
   --------------------
241
   -- Set_User_State --
242
   --------------------
243
 
244
   procedure Set_User_State (Value : Long_Integer) is
245
   begin
246
      STPO.Self.User_State := Value;
247
   end Set_User_State;
248
 
249
   ------------------------
250
   -- Signal_Debug_Event --
251
   ------------------------
252
 
253
   procedure Signal_Debug_Event
254
     (Event_Kind : Event_Kind_Type;
255
      Task_Value : Task_Id)
256
   is
257
   begin
258
      null;
259
   end Signal_Debug_Event;
260
 
261
   --------------------
262
   -- Stop_All_Tasks --
263
   --------------------
264
 
265
   procedure Stop_All_Tasks is
266
      C : Task_Id;
267
 
268
      Dummy : Boolean;
269
      pragma Unreferenced (Dummy);
270
 
271
   begin
272
      STPO.Lock_RTS;
273
 
274
      C := All_Tasks_List;
275
      while C /= null loop
276
         Dummy := STPO.Stop_Task (C);
277
         C := C.Common.All_Tasks_Link;
278
      end loop;
279
 
280
      STPO.Unlock_RTS;
281
   end Stop_All_Tasks;
282
 
283
   ----------------------------
284
   -- Stop_All_Tasks_Handler --
285
   ----------------------------
286
 
287
   procedure Stop_All_Tasks_Handler is
288
   begin
289
      STPO.Stop_All_Tasks;
290
   end Stop_All_Tasks_Handler;
291
 
292
   -----------------------
293
   -- Suspend_All_Tasks --
294
   -----------------------
295
 
296
   procedure Suspend_All_Tasks (Thread_Self : OS_Interface.Thread_Id) is
297
      C     : Task_Id;
298
      Dummy : Boolean;
299
      pragma Unreferenced (Dummy);
300
 
301
   begin
302
      STPO.Lock_RTS;
303
      C := All_Tasks_List;
304
 
305
      while C /= null loop
306
         Dummy := STPO.Suspend_Task (C, Thread_Self);
307
         C := C.Common.All_Tasks_Link;
308
      end loop;
309
 
310
      STPO.Unlock_RTS;
311
   end Suspend_All_Tasks;
312
 
313
   ------------------------
314
   -- Task_Creation_Hook --
315
   ------------------------
316
 
317
   procedure Task_Creation_Hook (Thread : OS_Interface.Thread_Id) is
318
      pragma Inspection_Point (Thread);
319
      --  gdb needs to access the thread parameter in order to implement
320
      --  the multitask mode under VxWorks.
321
 
322
   begin
323
      null;
324
   end Task_Creation_Hook;
325
 
326
   ---------------------------
327
   -- Task_Termination_Hook --
328
   ---------------------------
329
 
330
   procedure Task_Termination_Hook is
331
   begin
332
      null;
333
   end Task_Termination_Hook;
334
 
335
   -----------
336
   -- Trace --
337
   -----------
338
 
339
   procedure Trace
340
     (Self_Id  : Task_Id;
341
      Msg      : String;
342
      Flag     : Character;
343
      Other_Id : Task_Id := null)
344
   is
345
   begin
346
      if Trace_On (Flag) then
347
         Put (To_Integer (Self_Id)'Img &
348
              ':' & Flag & ':' &
349
              Self_Id.Common.Task_Image (1 .. Self_Id.Common.Task_Image_Len) &
350
              ':');
351
 
352
         if Other_Id /= null then
353
            Put (To_Integer (Other_Id)'Img & ':');
354
         end if;
355
 
356
         Put_Line (Msg);
357
      end if;
358
   end Trace;
359
 
360
   -----------
361
   -- Write --
362
   -----------
363
 
364
   procedure Write (Fd : Integer; S : String; Count : Integer) is
365
      Discard : Integer;
366
      pragma Unreferenced (Discard);
367
   begin
368
      Discard := System.CRTL.write (Fd, S (S'First)'Address, Count);
369
      --  Is it really right to ignore write errors here ???
370
   end Write;
371
 
372
end System.Tasking.Debug;

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