1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
|
------------------------------------------------------------------------------
-- --
-- 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;
|
