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1 281 jeremybenn
------------------------------------------------------------------------------
2
--                                                                          --
3
--                         GNAT COMPILER COMPONENTS                         --
4
--                                                                          --
5
--                       A D A . E X C E P T I O N S                        --
6
--                                                                          --
7
--                                 B o d y                                  --
8
--                                                                          --
9
--          Copyright (C) 1992-2009, Free Software Foundation, Inc.         --
10
--                                                                          --
11
-- GNAT 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.                                     --
17
--                                                                          --
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.               --
21
--                                                                          --
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/>.                                          --
26
--                                                                          --
27
-- GNAT was originally developed  by the GNAT team at  New York University. --
28
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
29
--                                                                          --
30
------------------------------------------------------------------------------
31
 
32
--  This version of Ada.Exceptions is a full Ada 95 version, and Ada 2005
33
--  features such as the additional definitions of Exception_Name returning
34
--  Wide_[Wide_]String.
35
 
36
--  It is used for building the compiler and the basic tools, since these
37
--  builds may be done with bootstrap compilers that cannot handle these
38
--  additions. The full version of Ada.Exceptions can be found in the files
39
--  a-except-2005.ads/adb, and is used for all other builds where full Ada
40
--  2005 functionality is required. In particular, it is used for building
41
--  run times on all targets.
42
 
43
pragma Compiler_Unit;
44
 
45
pragma Style_Checks (All_Checks);
46
--  No subprogram ordering check, due to logical grouping
47
 
48
pragma Polling (Off);
49
--  We must turn polling off for this unit, because otherwise we get
50
--  elaboration circularities with System.Exception_Tables.
51
 
52
with System;                  use System;
53
with System.Exceptions;       use System.Exceptions;
54
with System.Standard_Library; use System.Standard_Library;
55
with System.Soft_Links;       use System.Soft_Links;
56
 
57
package body Ada.Exceptions is
58
 
59
   pragma Suppress (All_Checks);
60
   --  We definitely do not want exceptions occurring within this unit, or we
61
   --  are in big trouble. If an exceptional situation does occur, better that
62
   --  it not be raised, since raising it can cause confusing chaos.
63
 
64
   -----------------------
65
   -- Local Subprograms --
66
   -----------------------
67
 
68
   --  Note: the exported subprograms in this package body are called directly
69
   --  from C clients using the given external name, even though they are not
70
   --  technically visible in the Ada sense.
71
 
72
   procedure Process_Raise_Exception (E : Exception_Id);
73
   pragma No_Return (Process_Raise_Exception);
74
   --  This is the lowest level raise routine. It raises the exception
75
   --  referenced by Current_Excep.all in the TSD, without deferring abort
76
   --  (the caller must ensure that abort is deferred on entry).
77
 
78
   procedure To_Stderr (S : String);
79
   pragma Export (Ada, To_Stderr, "__gnat_to_stderr");
80
   --  Little routine to output string to stderr that is also used in the
81
   --  tasking run time.
82
 
83
   procedure To_Stderr (C : Character);
84
   pragma Inline (To_Stderr);
85
   pragma Export (Ada, To_Stderr, "__gnat_to_stderr_char");
86
   --  Little routine to output a character to stderr, used by some of the
87
   --  separate units below.
88
 
89
   package Exception_Data is
90
 
91
      ---------------------------------
92
      -- Exception messages routines --
93
      ---------------------------------
94
 
95
      procedure Set_Exception_C_Msg
96
        (Id   : Exception_Id;
97
         Msg1 : System.Address;
98
         Line : Integer        := 0;
99
         Msg2 : System.Address := System.Null_Address);
100
      --  This routine is called to setup the exception referenced by the
101
      --  Current_Excep field in the TSD to contain the indicated Id value
102
      --  and message. Msg1 is a null terminated string which is generated
103
      --  as the exception message. If line is non-zero, then a colon and
104
      --  the decimal representation of this integer is appended to the
105
      --  message. When Msg2 is non-null, a space and this additional null
106
      --  terminated string is added to the message.
107
 
108
      procedure Set_Exception_Msg
109
        (Id      : Exception_Id;
110
         Message : String);
111
      --  This routine is called to setup the exception referenced by the
112
      --  Current_Excep field in the TSD to contain the indicated Id value and
113
      --  message. Message is a string which is generated as the exception
114
      --  message.
115
 
116
      --------------------------------------
117
      -- Exception information subprogram --
118
      --------------------------------------
119
 
120
      function Exception_Information (X : Exception_Occurrence) return String;
121
      --  The format of the exception information is as follows:
122
      --
123
      --    Exception_Name: <exception name> (as in Exception_Name)
124
      --    Message: <message> (only if Exception_Message is empty)
125
      --    PID=nnnn (only if != 0)
126
      --    Call stack traceback locations:  (only if at least one location)
127
      --    <0xyyyyyyyy 0xyyyyyyyy ...>      (is recorded)
128
      --
129
      --  The lines are separated by a ASCII.LF character
130
      --
131
      --  The nnnn is the partition Id given as decimal digits
132
      --
133
      --  The 0x... line represents traceback program counter locations, in
134
      --  execution order with the first one being the exception location. It
135
      --  is present only
136
      --
137
      --  The Exception_Name and Message lines are omitted in the abort signal
138
      --  case, since this is not really an exception.
139
 
140
      --  Note: If the format of the generated string is changed, please note
141
      --  that an equivalent modification to the routine String_To_EO must be
142
      --  made to preserve proper functioning of the stream attributes.
143
 
144
      ---------------------------------------
145
      -- Exception backtracing subprograms --
146
      ---------------------------------------
147
 
148
      --  What is automatically output when exception tracing is on is the
149
      --  usual exception information with the call chain backtrace possibly
150
      --  tailored by a backtrace decorator. Modifying Exception_Information
151
      --  itself is not a good idea because the decorated output is completely
152
      --  out of control and would break all our code related to the streaming
153
      --  of exceptions.  We then provide an alternative function to compute
154
      --  the possibly tailored output, which is equivalent if no decorator is
155
      --  currently set:
156
 
157
      function Tailored_Exception_Information
158
        (X : Exception_Occurrence) return String;
159
      --  Exception information to be output in the case of automatic tracing
160
      --  requested through GNAT.Exception_Traces.
161
      --
162
      --  This is the same as Exception_Information if no backtrace decorator
163
      --  is currently in place. Otherwise, this is Exception_Information with
164
      --  the call chain raw addresses replaced by the result of a call to the
165
      --  current decorator provided with the call chain addresses.
166
 
167
      pragma Export
168
        (Ada, Tailored_Exception_Information,
169
           "__gnat_tailored_exception_information");
170
      --  This is currently used by System.Tasking.Stages
171
 
172
   end Exception_Data;
173
 
174
   package Exception_Traces is
175
 
176
      use Exception_Data;
177
      --  Imports Tailored_Exception_Information
178
 
179
      ----------------------------------------------
180
      -- Run-Time Exception Notification Routines --
181
      ----------------------------------------------
182
 
183
      --  These subprograms provide a common run-time interface to trigger the
184
      --  actions required when an exception is about to be propagated (e.g.
185
      --  user specified actions or output of exception information). They are
186
      --  exported to be usable by the Ada exception handling personality
187
      --  routine when the GCC 3 mechanism is used.
188
 
189
      procedure Notify_Handled_Exception;
190
      pragma Export
191
        (C, Notify_Handled_Exception, "__gnat_notify_handled_exception");
192
      --  This routine is called for a handled occurrence is about to be
193
      --  propagated.
194
 
195
      procedure Notify_Unhandled_Exception;
196
      pragma Export
197
        (C, Notify_Unhandled_Exception, "__gnat_notify_unhandled_exception");
198
      --  This routine is called when an unhandled occurrence is about to be
199
      --  propagated.
200
 
201
      procedure Unhandled_Exception_Terminate;
202
      pragma No_Return (Unhandled_Exception_Terminate);
203
      --  This procedure is called to terminate program execution following an
204
      --  unhandled exception. The exception information, including traceback
205
      --  if available is output, and execution is then terminated. Note that
206
      --  at the point where this routine is called, the stack has typically
207
      --  been destroyed.
208
 
209
   end Exception_Traces;
210
 
211
   package Exception_Propagation is
212
 
213
      procedure Setup_Exception
214
        (Excep    : EOA;
215
         Current  : EOA;
216
         Reraised : Boolean := False);
217
      --  Dummy routine used to share a-exexda.adb, do nothing
218
 
219
   end Exception_Propagation;
220
 
221
   package Stream_Attributes is
222
 
223
      --------------------------------
224
      -- Stream attributes routines --
225
      --------------------------------
226
 
227
      function EId_To_String (X : Exception_Id) return String;
228
      function String_To_EId (S : String) return Exception_Id;
229
      --  Functions for implementing Exception_Id stream attributes
230
 
231
      function EO_To_String (X : Exception_Occurrence) return String;
232
      function String_To_EO (S : String) return Exception_Occurrence;
233
      --  Functions for implementing Exception_Occurrence stream
234
      --  attributes
235
 
236
   end Stream_Attributes;
237
 
238
   procedure Raise_Current_Excep (E : Exception_Id);
239
   pragma No_Return (Raise_Current_Excep);
240
   pragma Export (C, Raise_Current_Excep, "__gnat_raise_nodefer_with_msg");
241
   --  This is a simple wrapper to Process_Raise_Exception.
242
   --
243
   --  This external name for Raise_Current_Excep is historical, and probably
244
   --  should be changed but for now we keep it, because gdb and gigi know
245
   --  about it.
246
 
247
   procedure Raise_Exception_No_Defer
248
      (E : Exception_Id; Message : String := "");
249
   pragma Export
250
    (Ada, Raise_Exception_No_Defer,
251
     "ada__exceptions__raise_exception_no_defer");
252
   pragma No_Return (Raise_Exception_No_Defer);
253
   --  Similar to Raise_Exception, but with no abort deferral
254
 
255
   procedure Raise_With_Msg (E : Exception_Id);
256
   pragma No_Return (Raise_With_Msg);
257
   pragma Export (C, Raise_With_Msg, "__gnat_raise_with_msg");
258
   --  Raises an exception with given exception id value. A message is
259
   --  associated with the raise, and has already been stored in the exception
260
   --  occurrence referenced by the Current_Excep in the TSD. Abort is deferred
261
   --  before the raise call.
262
 
263
   procedure Raise_With_Location_And_Msg
264
     (E : Exception_Id;
265
      F : System.Address;
266
      L : Integer;
267
      M : System.Address := System.Null_Address);
268
   pragma No_Return (Raise_With_Location_And_Msg);
269
   --  Raise an exception with given exception id value. A filename and line
270
   --  number is associated with the raise and is stored in the exception
271
   --  occurrence and in addition a string message M is appended to this
272
   --  if M is not null.
273
 
274
   procedure Raise_Constraint_Error
275
     (File : System.Address;
276
      Line : Integer);
277
   pragma No_Return (Raise_Constraint_Error);
278
   pragma Export
279
     (C, Raise_Constraint_Error, "__gnat_raise_constraint_error");
280
   --  Raise constraint error with file:line information
281
 
282
   procedure Raise_Constraint_Error_Msg
283
     (File : System.Address;
284
      Line : Integer;
285
      Msg  : System.Address);
286
   pragma No_Return (Raise_Constraint_Error_Msg);
287
   pragma Export
288
     (C, Raise_Constraint_Error_Msg, "__gnat_raise_constraint_error_msg");
289
   --  Raise constraint error with file:line + msg information
290
 
291
   procedure Raise_Program_Error
292
     (File : System.Address;
293
      Line : Integer);
294
   pragma No_Return (Raise_Program_Error);
295
   pragma Export
296
     (C, Raise_Program_Error, "__gnat_raise_program_error");
297
   --  Raise program error with file:line information
298
 
299
   procedure Raise_Program_Error_Msg
300
     (File : System.Address;
301
      Line : Integer;
302
      Msg  : System.Address);
303
   pragma No_Return (Raise_Program_Error_Msg);
304
   pragma Export
305
     (C, Raise_Program_Error_Msg, "__gnat_raise_program_error_msg");
306
   --  Raise program error with file:line + msg information
307
 
308
   procedure Raise_Storage_Error
309
     (File : System.Address;
310
      Line : Integer);
311
   pragma No_Return (Raise_Storage_Error);
312
   pragma Export
313
     (C, Raise_Storage_Error, "__gnat_raise_storage_error");
314
   --  Raise storage error with file:line information
315
 
316
   procedure Raise_Storage_Error_Msg
317
     (File : System.Address;
318
      Line : Integer;
319
      Msg  : System.Address);
320
   pragma No_Return (Raise_Storage_Error_Msg);
321
   pragma Export
322
     (C, Raise_Storage_Error_Msg, "__gnat_raise_storage_error_msg");
323
   --  Raise storage error with file:line + reason msg information
324
 
325
   --  The exception raising process and the automatic tracing mechanism rely
326
   --  on some careful use of flags attached to the exception occurrence. The
327
   --  graph below illustrates the relations between the Raise_ subprograms
328
   --  and identifies the points where basic flags such as Exception_Raised
329
   --  are initialized.
330
   --
331
   --  (i) signs indicate the flags initialization points. R stands for Raise,
332
   --  W for With, and E for Exception.
333
   --
334
   --                   R_No_Msg    R_E   R_Pe  R_Ce  R_Se
335
   --                       |        |     |     |     |
336
   --                       +--+  +--+     +---+ | +---+
337
   --                          |  |            | | |
338
   --     R_E_No_Defer(i)    R_W_Msg(i)       R_W_Loc
339
   --           |               |              |   |
340
   --           +------------+  |  +-----------+   +--+
341
   --                        |  |  |                  |
342
   --                        |  |  |             Set_E_C_Msg(i)
343
   --                        |  |  |
344
   --                   Raise_Current_Excep
345
 
346
   procedure Reraise;
347
   pragma No_Return (Reraise);
348
   pragma Export (C, Reraise, "__gnat_reraise");
349
   --  Reraises the exception referenced by the Current_Excep field of the TSD
350
   --  (all fields of this exception occurrence are set). Abort is deferred
351
   --  before the reraise operation.
352
 
353
   --  Save_Occurrence variations: As the management of the private data
354
   --  attached to occurrences is delicate, whether or not pointers to such
355
   --  data has to be copied in various situations is better made explicit.
356
   --  The following procedures provide an internal interface to help making
357
   --  this explicit.
358
 
359
   procedure Save_Occurrence_No_Private
360
     (Target : out Exception_Occurrence;
361
      Source : Exception_Occurrence);
362
   --  Copy all the components of Source to Target, except the
363
   --  Private_Data pointer.
364
 
365
   procedure Transfer_Occurrence
366
     (Target : Exception_Occurrence_Access;
367
      Source : Exception_Occurrence);
368
   pragma Export (C, Transfer_Occurrence, "__gnat_transfer_occurrence");
369
   --  Called from System.Tasking.RendezVous.Exceptional_Complete_RendezVous
370
   --  to setup Target from Source as an exception to be propagated in the
371
   --  caller task. Target is expected to be a pointer to the fixed TSD
372
   --  occurrence for this task.
373
 
374
   -----------------------------
375
   -- Run-Time Check Routines --
376
   -----------------------------
377
 
378
   --  Routines to a specific exception with a reason message attached. The
379
   --  parameters are the file name and line number in each case. The names are
380
   --  keyed to the codes defined in types.ads and a-types.h (for example, the
381
   --  name Rcheck_05 refers to the Reason RT_Exception_Code'Val (5)).
382
 
383
   procedure Rcheck_00 (File : System.Address; Line : Integer);
384
   procedure Rcheck_01 (File : System.Address; Line : Integer);
385
   procedure Rcheck_02 (File : System.Address; Line : Integer);
386
   procedure Rcheck_03 (File : System.Address; Line : Integer);
387
   procedure Rcheck_04 (File : System.Address; Line : Integer);
388
   procedure Rcheck_05 (File : System.Address; Line : Integer);
389
   procedure Rcheck_06 (File : System.Address; Line : Integer);
390
   procedure Rcheck_07 (File : System.Address; Line : Integer);
391
   procedure Rcheck_08 (File : System.Address; Line : Integer);
392
   procedure Rcheck_09 (File : System.Address; Line : Integer);
393
   procedure Rcheck_10 (File : System.Address; Line : Integer);
394
   procedure Rcheck_11 (File : System.Address; Line : Integer);
395
   procedure Rcheck_12 (File : System.Address; Line : Integer);
396
   procedure Rcheck_13 (File : System.Address; Line : Integer);
397
   procedure Rcheck_14 (File : System.Address; Line : Integer);
398
   procedure Rcheck_15 (File : System.Address; Line : Integer);
399
   procedure Rcheck_16 (File : System.Address; Line : Integer);
400
   procedure Rcheck_17 (File : System.Address; Line : Integer);
401
   procedure Rcheck_18 (File : System.Address; Line : Integer);
402
   procedure Rcheck_19 (File : System.Address; Line : Integer);
403
   procedure Rcheck_20 (File : System.Address; Line : Integer);
404
   procedure Rcheck_21 (File : System.Address; Line : Integer);
405
   procedure Rcheck_22 (File : System.Address; Line : Integer);
406
   procedure Rcheck_23 (File : System.Address; Line : Integer);
407
   procedure Rcheck_24 (File : System.Address; Line : Integer);
408
   procedure Rcheck_25 (File : System.Address; Line : Integer);
409
   procedure Rcheck_26 (File : System.Address; Line : Integer);
410
   procedure Rcheck_27 (File : System.Address; Line : Integer);
411
   procedure Rcheck_28 (File : System.Address; Line : Integer);
412
   procedure Rcheck_29 (File : System.Address; Line : Integer);
413
   procedure Rcheck_30 (File : System.Address; Line : Integer);
414
   procedure Rcheck_31 (File : System.Address; Line : Integer);
415
   procedure Rcheck_32 (File : System.Address; Line : Integer);
416
   procedure Rcheck_33 (File : System.Address; Line : Integer);
417
 
418
   pragma Export (C, Rcheck_00, "__gnat_rcheck_00");
419
   pragma Export (C, Rcheck_01, "__gnat_rcheck_01");
420
   pragma Export (C, Rcheck_02, "__gnat_rcheck_02");
421
   pragma Export (C, Rcheck_03, "__gnat_rcheck_03");
422
   pragma Export (C, Rcheck_04, "__gnat_rcheck_04");
423
   pragma Export (C, Rcheck_05, "__gnat_rcheck_05");
424
   pragma Export (C, Rcheck_06, "__gnat_rcheck_06");
425
   pragma Export (C, Rcheck_07, "__gnat_rcheck_07");
426
   pragma Export (C, Rcheck_08, "__gnat_rcheck_08");
427
   pragma Export (C, Rcheck_09, "__gnat_rcheck_09");
428
   pragma Export (C, Rcheck_10, "__gnat_rcheck_10");
429
   pragma Export (C, Rcheck_11, "__gnat_rcheck_11");
430
   pragma Export (C, Rcheck_12, "__gnat_rcheck_12");
431
   pragma Export (C, Rcheck_13, "__gnat_rcheck_13");
432
   pragma Export (C, Rcheck_14, "__gnat_rcheck_14");
433
   pragma Export (C, Rcheck_15, "__gnat_rcheck_15");
434
   pragma Export (C, Rcheck_16, "__gnat_rcheck_16");
435
   pragma Export (C, Rcheck_17, "__gnat_rcheck_17");
436
   pragma Export (C, Rcheck_18, "__gnat_rcheck_18");
437
   pragma Export (C, Rcheck_19, "__gnat_rcheck_19");
438
   pragma Export (C, Rcheck_20, "__gnat_rcheck_20");
439
   pragma Export (C, Rcheck_21, "__gnat_rcheck_21");
440
   pragma Export (C, Rcheck_22, "__gnat_rcheck_22");
441
   pragma Export (C, Rcheck_23, "__gnat_rcheck_23");
442
   pragma Export (C, Rcheck_24, "__gnat_rcheck_24");
443
   pragma Export (C, Rcheck_25, "__gnat_rcheck_25");
444
   pragma Export (C, Rcheck_26, "__gnat_rcheck_26");
445
   pragma Export (C, Rcheck_27, "__gnat_rcheck_27");
446
   pragma Export (C, Rcheck_28, "__gnat_rcheck_28");
447
   pragma Export (C, Rcheck_29, "__gnat_rcheck_29");
448
   pragma Export (C, Rcheck_30, "__gnat_rcheck_30");
449
   pragma Export (C, Rcheck_31, "__gnat_rcheck_31");
450
   pragma Export (C, Rcheck_32, "__gnat_rcheck_32");
451
   pragma Export (C, Rcheck_33, "__gnat_rcheck_33");
452
 
453
   --  None of these procedures ever returns (they raise an exception!). By
454
   --  using pragma No_Return, we ensure that any junk code after the call,
455
   --  such as normal return epilog stuff, can be eliminated).
456
 
457
   pragma No_Return (Rcheck_00);
458
   pragma No_Return (Rcheck_01);
459
   pragma No_Return (Rcheck_02);
460
   pragma No_Return (Rcheck_03);
461
   pragma No_Return (Rcheck_04);
462
   pragma No_Return (Rcheck_05);
463
   pragma No_Return (Rcheck_06);
464
   pragma No_Return (Rcheck_07);
465
   pragma No_Return (Rcheck_08);
466
   pragma No_Return (Rcheck_09);
467
   pragma No_Return (Rcheck_10);
468
   pragma No_Return (Rcheck_11);
469
   pragma No_Return (Rcheck_12);
470
   pragma No_Return (Rcheck_13);
471
   pragma No_Return (Rcheck_14);
472
   pragma No_Return (Rcheck_15);
473
   pragma No_Return (Rcheck_16);
474
   pragma No_Return (Rcheck_17);
475
   pragma No_Return (Rcheck_18);
476
   pragma No_Return (Rcheck_19);
477
   pragma No_Return (Rcheck_20);
478
   pragma No_Return (Rcheck_21);
479
   pragma No_Return (Rcheck_22);
480
   pragma No_Return (Rcheck_23);
481
   pragma No_Return (Rcheck_24);
482
   pragma No_Return (Rcheck_25);
483
   pragma No_Return (Rcheck_26);
484
   pragma No_Return (Rcheck_27);
485
   pragma No_Return (Rcheck_28);
486
   pragma No_Return (Rcheck_29);
487
   pragma No_Return (Rcheck_30);
488
   pragma No_Return (Rcheck_32);
489
   pragma No_Return (Rcheck_33);
490
 
491
   ---------------------------------------------
492
   -- Reason Strings for Run-Time Check Calls --
493
   ---------------------------------------------
494
 
495
   --  These strings are null-terminated and are used by Rcheck_nn. The
496
   --  strings correspond to the definitions for Types.RT_Exception_Code.
497
 
498
   use ASCII;
499
 
500
   Rmsg_00 : constant String := "access check failed"              & NUL;
501
   Rmsg_01 : constant String := "access parameter is null"         & NUL;
502
   Rmsg_02 : constant String := "discriminant check failed"        & NUL;
503
   Rmsg_03 : constant String := "divide by zero"                   & NUL;
504
   Rmsg_04 : constant String := "explicit raise"                   & NUL;
505
   Rmsg_05 : constant String := "index check failed"               & NUL;
506
   Rmsg_06 : constant String := "invalid data"                     & NUL;
507
   Rmsg_07 : constant String := "length check failed"              & NUL;
508
   Rmsg_08 : constant String := "null Exception_Id"                & NUL;
509
   Rmsg_09 : constant String := "null-exclusion check failed"      & NUL;
510
   Rmsg_10 : constant String := "overflow check failed"            & NUL;
511
   Rmsg_11 : constant String := "partition check failed"           & NUL;
512
   Rmsg_12 : constant String := "range check failed"               & NUL;
513
   Rmsg_13 : constant String := "tag check failed"                 & NUL;
514
   Rmsg_14 : constant String := "access before elaboration"        & NUL;
515
   Rmsg_15 : constant String := "accessibility check failed"       & NUL;
516
   Rmsg_16 : constant String := "attempt to take address of"       &
517
                                " intrinsic subprogram"            & NUL;
518
   Rmsg_17 : constant String := "all guards closed"                & NUL;
519
   Rmsg_18 : constant String := "Current_Task referenced in entry" &
520
                                " body"                            & NUL;
521
   Rmsg_19 : constant String := "duplicated entry address"         & NUL;
522
   Rmsg_20 : constant String := "explicit raise"                   & NUL;
523
   Rmsg_21 : constant String := "finalize/adjust raised exception" & NUL;
524
   Rmsg_22 : constant String := "implicit return with No_Return"   & NUL;
525
   Rmsg_23 : constant String := "misaligned address value"         & NUL;
526
   Rmsg_24 : constant String := "missing return"                   & NUL;
527
   Rmsg_25 : constant String := "overlaid controlled object"       & NUL;
528
   Rmsg_26 : constant String := "potentially blocking operation"   & NUL;
529
   Rmsg_27 : constant String := "stubbed subprogram called"        & NUL;
530
   Rmsg_28 : constant String := "unchecked union restriction"      & NUL;
531
   Rmsg_29 : constant String := "actual/returned class-wide"       &
532
                                " value not transportable"         & NUL;
533
   Rmsg_30 : constant String := "empty storage pool"               & NUL;
534
   Rmsg_31 : constant String := "explicit raise"                   & NUL;
535
   Rmsg_32 : constant String := "infinite recursion"               & NUL;
536
   Rmsg_33 : constant String := "object too large"                 & NUL;
537
 
538
   -----------------------
539
   -- Polling Interface --
540
   -----------------------
541
 
542
   type Unsigned is mod 2 ** 32;
543
 
544
   Counter : Unsigned := 0;
545
   pragma Warnings (Off, Counter);
546
   --  This counter is provided for convenience. It can be used in Poll to
547
   --  perform periodic but not systematic operations.
548
 
549
   procedure Poll is separate;
550
   --  The actual polling routine is separate, so that it can easily be
551
   --  replaced with a target dependent version.
552
 
553
   ------------------------------
554
   -- Current_Target_Exception --
555
   ------------------------------
556
 
557
   function Current_Target_Exception return Exception_Occurrence is
558
   begin
559
      return Null_Occurrence;
560
   end Current_Target_Exception;
561
 
562
   -------------------
563
   -- EId_To_String --
564
   -------------------
565
 
566
   function EId_To_String (X : Exception_Id) return String
567
     renames Stream_Attributes.EId_To_String;
568
 
569
   ------------------
570
   -- EO_To_String --
571
   ------------------
572
 
573
   --  We use the null string to represent the null occurrence, otherwise we
574
   --  output the Exception_Information string for the occurrence.
575
 
576
   function EO_To_String (X : Exception_Occurrence) return String
577
     renames Stream_Attributes.EO_To_String;
578
 
579
   ------------------------
580
   -- Exception_Identity --
581
   ------------------------
582
 
583
   function Exception_Identity
584
     (X : Exception_Occurrence) return Exception_Id
585
   is
586
   begin
587
      --  Note that the following test used to be here for the original Ada 95
588
      --  semantics, but these were modified by AI-241 to require returning
589
      --  Null_Id instead of raising Constraint_Error.
590
 
591
      --  if X.Id = Null_Id then
592
      --     raise Constraint_Error;
593
      --  end if;
594
 
595
      return X.Id;
596
   end Exception_Identity;
597
 
598
   ---------------------------
599
   -- Exception_Information --
600
   ---------------------------
601
 
602
   function Exception_Information (X : Exception_Occurrence) return String is
603
   begin
604
      if X.Id = Null_Id then
605
         raise Constraint_Error;
606
      end if;
607
 
608
      return Exception_Data.Exception_Information (X);
609
   end Exception_Information;
610
 
611
   -----------------------
612
   -- Exception_Message --
613
   -----------------------
614
 
615
   function Exception_Message (X : Exception_Occurrence) return String is
616
   begin
617
      if X.Id = Null_Id then
618
         raise Constraint_Error;
619
      end if;
620
 
621
      return X.Msg (1 .. X.Msg_Length);
622
   end Exception_Message;
623
 
624
   --------------------
625
   -- Exception_Name --
626
   --------------------
627
 
628
   function Exception_Name (Id : Exception_Id) return String is
629
   begin
630
      if Id = null then
631
         raise Constraint_Error;
632
      end if;
633
 
634
      return To_Ptr (Id.Full_Name) (1 .. Id.Name_Length - 1);
635
   end Exception_Name;
636
 
637
   function Exception_Name (X : Exception_Occurrence) return String is
638
   begin
639
      return Exception_Name (X.Id);
640
   end Exception_Name;
641
 
642
   ---------------------------
643
   -- Exception_Name_Simple --
644
   ---------------------------
645
 
646
   function Exception_Name_Simple (X : Exception_Occurrence) return String is
647
      Name : constant String := Exception_Name (X);
648
      P    : Natural;
649
 
650
   begin
651
      P := Name'Length;
652
      while P > 1 loop
653
         exit when Name (P - 1) = '.';
654
         P := P - 1;
655
      end loop;
656
 
657
      --  Return result making sure lower bound is 1
658
 
659
      declare
660
         subtype Rname is String (1 .. Name'Length - P + 1);
661
      begin
662
         return Rname (Name (P .. Name'Length));
663
      end;
664
   end Exception_Name_Simple;
665
 
666
   --------------------
667
   -- Exception_Data --
668
   --------------------
669
 
670
   package body Exception_Data is separate;
671
   --  This package can be easily dummied out if we do not want the basic
672
   --  support for exception messages (such as in Ada 83).
673
 
674
   package body Exception_Propagation is
675
 
676
      procedure Setup_Exception
677
        (Excep    : EOA;
678
         Current  : EOA;
679
         Reraised : Boolean := False)
680
      is
681
         pragma Warnings (Off, Excep);
682
         pragma Warnings (Off, Current);
683
         pragma Warnings (Off, Reraised);
684
      begin
685
         null;
686
      end Setup_Exception;
687
 
688
   end Exception_Propagation;
689
 
690
   ----------------------
691
   -- Exception_Traces --
692
   ----------------------
693
 
694
   package body Exception_Traces is separate;
695
   --  Depending on the underlying support for IO the implementation will
696
   --  differ. Moreover we would like to dummy out this package in case we do
697
   --  not want any exception tracing support. This is why this package is
698
   --  separated.
699
 
700
   -----------------------
701
   -- Stream Attributes --
702
   -----------------------
703
 
704
   package body Stream_Attributes is separate;
705
   --  This package can be easily dummied out if we do not want the
706
   --  support for streaming Exception_Ids and Exception_Occurrences.
707
 
708
   -----------------------------
709
   -- Process_Raise_Exception --
710
   -----------------------------
711
 
712
   procedure Process_Raise_Exception (E : Exception_Id) is
713
      pragma Inspection_Point (E);
714
      --  This is so the debugger can reliably inspect the parameter
715
 
716
      Jumpbuf_Ptr : constant Address := Get_Jmpbuf_Address.all;
717
      Excep       : constant EOA := Get_Current_Excep.all;
718
 
719
      procedure builtin_longjmp (buffer : Address; Flag : Integer);
720
      pragma No_Return (builtin_longjmp);
721
      pragma Import (C, builtin_longjmp, "_gnat_builtin_longjmp");
722
 
723
   begin
724
      --  WARNING: There should be no exception handler for this body because
725
      --  this would cause gigi to prepend a setup for a new jmpbuf to the
726
      --  sequence of statements in case of built-in sjljl. We would then
727
      --  always get this new buf in Jumpbuf_Ptr instead of the one for the
728
      --  exception we are handling, which would completely break the whole
729
      --  design of this procedure.
730
 
731
      --  If the jump buffer pointer is non-null, transfer control using it.
732
      --  Otherwise announce an unhandled exception (note that this means that
733
      --  we have no finalizations to do other than at the outer level).
734
      --  Perform the necessary notification tasks in both cases.
735
 
736
      if Jumpbuf_Ptr /= Null_Address then
737
         if not Excep.Exception_Raised then
738
            Excep.Exception_Raised := True;
739
            Exception_Traces.Notify_Handled_Exception;
740
         end if;
741
 
742
         builtin_longjmp (Jumpbuf_Ptr, 1);
743
 
744
      else
745
         Exception_Traces.Notify_Unhandled_Exception;
746
         Exception_Traces.Unhandled_Exception_Terminate;
747
      end if;
748
   end Process_Raise_Exception;
749
 
750
   ----------------------------
751
   -- Raise_Constraint_Error --
752
   ----------------------------
753
 
754
   procedure Raise_Constraint_Error
755
     (File : System.Address;
756
      Line : Integer)
757
   is
758
   begin
759
      Raise_With_Location_And_Msg
760
        (Constraint_Error_Def'Access, File, Line);
761
   end Raise_Constraint_Error;
762
 
763
   --------------------------------
764
   -- Raise_Constraint_Error_Msg --
765
   --------------------------------
766
 
767
   procedure Raise_Constraint_Error_Msg
768
     (File : System.Address;
769
      Line : Integer;
770
      Msg  : System.Address)
771
   is
772
   begin
773
      Raise_With_Location_And_Msg
774
        (Constraint_Error_Def'Access, File, Line, Msg);
775
   end Raise_Constraint_Error_Msg;
776
 
777
   -------------------------
778
   -- Raise_Current_Excep --
779
   -------------------------
780
 
781
   procedure Raise_Current_Excep (E : Exception_Id) is
782
 
783
      pragma Inspection_Point (E);
784
      --  This is so the debugger can reliably inspect the parameter when
785
      --  inserting a breakpoint at the start of this procedure.
786
 
787
      Id : Exception_Id := E;
788
      pragma Volatile (Id);
789
      pragma Warnings (Off, Id);
790
      --  In order to provide support for breakpoints on unhandled exceptions,
791
      --  the debugger will also need to be able to inspect the value of E from
792
      --  another (inner) frame. So we need to make sure that if E is passed in
793
      --  a register, its value is also spilled on stack. For this, we store
794
      --  the parameter value in a local variable, and add a pragma Volatile to
795
      --  make sure it is spilled. The pragma Warnings (Off) is needed because
796
      --  the compiler knows that Id is not referenced and that this use of
797
      --  pragma Volatile is peculiar!
798
 
799
   begin
800
      Debug_Raise_Exception (E => SSL.Exception_Data_Ptr (E));
801
      Process_Raise_Exception (E);
802
   end Raise_Current_Excep;
803
 
804
   ---------------------
805
   -- Raise_Exception --
806
   ---------------------
807
 
808
   procedure Raise_Exception
809
     (E       : Exception_Id;
810
      Message : String := "")
811
   is
812
      EF : Exception_Id := E;
813
 
814
   begin
815
      --  Raise CE if E = Null_ID (AI-446)
816
 
817
      if E = null then
818
         EF := Constraint_Error'Identity;
819
      end if;
820
 
821
      --  Go ahead and raise appropriate exception
822
 
823
      Exception_Data.Set_Exception_Msg (EF, Message);
824
      Abort_Defer.all;
825
      Raise_Current_Excep (EF);
826
   end Raise_Exception;
827
 
828
   ----------------------------
829
   -- Raise_Exception_Always --
830
   ----------------------------
831
 
832
   procedure Raise_Exception_Always
833
     (E       : Exception_Id;
834
      Message : String := "")
835
   is
836
   begin
837
      Exception_Data.Set_Exception_Msg (E, Message);
838
      Abort_Defer.all;
839
      Raise_Current_Excep (E);
840
   end Raise_Exception_Always;
841
 
842
   -------------------------------------
843
   -- Raise_From_Controlled_Operation --
844
   -------------------------------------
845
 
846
   procedure Raise_From_Controlled_Operation
847
     (X : Ada.Exceptions.Exception_Occurrence)
848
   is
849
      Prefix   : constant String := "adjust/finalize raised ";
850
      Orig_Msg : constant String := Exception_Message (X);
851
      New_Msg  : constant String := Prefix & Exception_Name (X);
852
 
853
   begin
854
      if Orig_Msg'Length >= Prefix'Length
855
        and then
856
          Orig_Msg (Orig_Msg'First .. Orig_Msg'First + Prefix'Length - 1) =
857
                                                                     Prefix
858
      then
859
         --  Message already has proper prefix, just re-reraise PROGRAM_ERROR
860
 
861
         Raise_Exception_No_Defer
862
           (E       => Program_Error'Identity,
863
            Message => Orig_Msg);
864
 
865
      elsif Orig_Msg = "" then
866
 
867
         --  No message present: just provide our own
868
 
869
         Raise_Exception_No_Defer
870
           (E       => Program_Error'Identity,
871
            Message => New_Msg);
872
 
873
      else
874
         --  Message present, add informational prefix
875
 
876
         Raise_Exception_No_Defer
877
           (E       => Program_Error'Identity,
878
            Message => New_Msg & ": " & Orig_Msg);
879
      end if;
880
   end Raise_From_Controlled_Operation;
881
 
882
   -------------------------------
883
   -- Raise_From_Signal_Handler --
884
   -------------------------------
885
 
886
   procedure Raise_From_Signal_Handler
887
     (E : Exception_Id;
888
      M : System.Address)
889
   is
890
   begin
891
      Exception_Data.Set_Exception_C_Msg (E, M);
892
      Abort_Defer.all;
893
      Process_Raise_Exception (E);
894
   end Raise_From_Signal_Handler;
895
 
896
   -------------------------
897
   -- Raise_Program_Error --
898
   -------------------------
899
 
900
   procedure Raise_Program_Error
901
     (File : System.Address;
902
      Line : Integer)
903
   is
904
   begin
905
      Raise_With_Location_And_Msg
906
        (Program_Error_Def'Access, File, Line);
907
   end Raise_Program_Error;
908
 
909
   -----------------------------
910
   -- Raise_Program_Error_Msg --
911
   -----------------------------
912
 
913
   procedure Raise_Program_Error_Msg
914
     (File : System.Address;
915
      Line : Integer;
916
      Msg  : System.Address)
917
   is
918
   begin
919
      Raise_With_Location_And_Msg
920
        (Program_Error_Def'Access, File, Line, Msg);
921
   end Raise_Program_Error_Msg;
922
 
923
   -------------------------
924
   -- Raise_Storage_Error --
925
   -------------------------
926
 
927
   procedure Raise_Storage_Error
928
     (File : System.Address;
929
      Line : Integer)
930
   is
931
   begin
932
      Raise_With_Location_And_Msg
933
        (Storage_Error_Def'Access, File, Line);
934
   end Raise_Storage_Error;
935
 
936
   -----------------------------
937
   -- Raise_Storage_Error_Msg --
938
   -----------------------------
939
 
940
   procedure Raise_Storage_Error_Msg
941
     (File : System.Address;
942
      Line : Integer;
943
      Msg  : System.Address)
944
   is
945
   begin
946
      Raise_With_Location_And_Msg
947
        (Storage_Error_Def'Access, File, Line, Msg);
948
   end Raise_Storage_Error_Msg;
949
 
950
   ---------------------------------
951
   -- Raise_With_Location_And_Msg --
952
   ---------------------------------
953
 
954
   procedure Raise_With_Location_And_Msg
955
     (E : Exception_Id;
956
      F : System.Address;
957
      L : Integer;
958
      M : System.Address := System.Null_Address)
959
   is
960
   begin
961
      Exception_Data.Set_Exception_C_Msg (E, F, L, M);
962
      Abort_Defer.all;
963
      Raise_Current_Excep (E);
964
   end Raise_With_Location_And_Msg;
965
 
966
   --------------------
967
   -- Raise_With_Msg --
968
   --------------------
969
 
970
   procedure Raise_With_Msg (E : Exception_Id) is
971
      Excep : constant EOA := Get_Current_Excep.all;
972
 
973
   begin
974
      Excep.Exception_Raised := False;
975
      Excep.Id               := E;
976
      Excep.Num_Tracebacks   := 0;
977
      Excep.Cleanup_Flag     := False;
978
      Excep.Pid              := Local_Partition_ID;
979
      Abort_Defer.all;
980
      Raise_Current_Excep (E);
981
   end Raise_With_Msg;
982
 
983
   --------------------------------------
984
   -- Calls to Run-Time Check Routines --
985
   --------------------------------------
986
 
987
   procedure Rcheck_00 (File : System.Address; Line : Integer) is
988
   begin
989
      Raise_Constraint_Error_Msg (File, Line, Rmsg_00'Address);
990
   end Rcheck_00;
991
 
992
   procedure Rcheck_01 (File : System.Address; Line : Integer) is
993
   begin
994
      Raise_Constraint_Error_Msg (File, Line, Rmsg_01'Address);
995
   end Rcheck_01;
996
 
997
   procedure Rcheck_02 (File : System.Address; Line : Integer) is
998
   begin
999
      Raise_Constraint_Error_Msg (File, Line, Rmsg_02'Address);
1000
   end Rcheck_02;
1001
 
1002
   procedure Rcheck_03 (File : System.Address; Line : Integer) is
1003
   begin
1004
      Raise_Constraint_Error_Msg (File, Line, Rmsg_03'Address);
1005
   end Rcheck_03;
1006
 
1007
   procedure Rcheck_04 (File : System.Address; Line : Integer) is
1008
   begin
1009
      Raise_Constraint_Error_Msg (File, Line, Rmsg_04'Address);
1010
   end Rcheck_04;
1011
 
1012
   procedure Rcheck_05 (File : System.Address; Line : Integer) is
1013
   begin
1014
      Raise_Constraint_Error_Msg (File, Line, Rmsg_05'Address);
1015
   end Rcheck_05;
1016
 
1017
   procedure Rcheck_06 (File : System.Address; Line : Integer) is
1018
   begin
1019
      Raise_Constraint_Error_Msg (File, Line, Rmsg_06'Address);
1020
   end Rcheck_06;
1021
 
1022
   procedure Rcheck_07 (File : System.Address; Line : Integer) is
1023
   begin
1024
      Raise_Constraint_Error_Msg (File, Line, Rmsg_07'Address);
1025
   end Rcheck_07;
1026
 
1027
   procedure Rcheck_08 (File : System.Address; Line : Integer) is
1028
   begin
1029
      Raise_Constraint_Error_Msg (File, Line, Rmsg_08'Address);
1030
   end Rcheck_08;
1031
 
1032
   procedure Rcheck_09 (File : System.Address; Line : Integer) is
1033
   begin
1034
      Raise_Constraint_Error_Msg (File, Line, Rmsg_09'Address);
1035
   end Rcheck_09;
1036
 
1037
   procedure Rcheck_10 (File : System.Address; Line : Integer) is
1038
   begin
1039
      Raise_Constraint_Error_Msg (File, Line, Rmsg_10'Address);
1040
   end Rcheck_10;
1041
 
1042
   procedure Rcheck_11 (File : System.Address; Line : Integer) is
1043
   begin
1044
      Raise_Constraint_Error_Msg (File, Line, Rmsg_11'Address);
1045
   end Rcheck_11;
1046
 
1047
   procedure Rcheck_12 (File : System.Address; Line : Integer) is
1048
   begin
1049
      Raise_Constraint_Error_Msg (File, Line, Rmsg_12'Address);
1050
   end Rcheck_12;
1051
 
1052
   procedure Rcheck_13 (File : System.Address; Line : Integer) is
1053
   begin
1054
      Raise_Constraint_Error_Msg (File, Line, Rmsg_13'Address);
1055
   end Rcheck_13;
1056
 
1057
   procedure Rcheck_14 (File : System.Address; Line : Integer) is
1058
   begin
1059
      Raise_Program_Error_Msg (File, Line, Rmsg_14'Address);
1060
   end Rcheck_14;
1061
 
1062
   procedure Rcheck_15 (File : System.Address; Line : Integer) is
1063
   begin
1064
      Raise_Program_Error_Msg (File, Line, Rmsg_15'Address);
1065
   end Rcheck_15;
1066
 
1067
   procedure Rcheck_16 (File : System.Address; Line : Integer) is
1068
   begin
1069
      Raise_Program_Error_Msg (File, Line, Rmsg_16'Address);
1070
   end Rcheck_16;
1071
 
1072
   procedure Rcheck_17 (File : System.Address; Line : Integer) is
1073
   begin
1074
      Raise_Program_Error_Msg (File, Line, Rmsg_17'Address);
1075
   end Rcheck_17;
1076
 
1077
   procedure Rcheck_18 (File : System.Address; Line : Integer) is
1078
   begin
1079
      Raise_Program_Error_Msg (File, Line, Rmsg_18'Address);
1080
   end Rcheck_18;
1081
 
1082
   procedure Rcheck_19 (File : System.Address; Line : Integer) is
1083
   begin
1084
      Raise_Program_Error_Msg (File, Line, Rmsg_19'Address);
1085
   end Rcheck_19;
1086
 
1087
   procedure Rcheck_20 (File : System.Address; Line : Integer) is
1088
   begin
1089
      Raise_Program_Error_Msg (File, Line, Rmsg_20'Address);
1090
   end Rcheck_20;
1091
 
1092
   procedure Rcheck_21 (File : System.Address; Line : Integer) is
1093
   begin
1094
      Raise_Program_Error_Msg (File, Line, Rmsg_21'Address);
1095
   end Rcheck_21;
1096
 
1097
   procedure Rcheck_22 (File : System.Address; Line : Integer) is
1098
   begin
1099
      Raise_Program_Error_Msg (File, Line, Rmsg_22'Address);
1100
   end Rcheck_22;
1101
 
1102
   procedure Rcheck_23 (File : System.Address; Line : Integer) is
1103
   begin
1104
      Raise_Program_Error_Msg (File, Line, Rmsg_23'Address);
1105
   end Rcheck_23;
1106
 
1107
   procedure Rcheck_24 (File : System.Address; Line : Integer) is
1108
   begin
1109
      Raise_Program_Error_Msg (File, Line, Rmsg_24'Address);
1110
   end Rcheck_24;
1111
 
1112
   procedure Rcheck_25 (File : System.Address; Line : Integer) is
1113
   begin
1114
      Raise_Program_Error_Msg (File, Line, Rmsg_25'Address);
1115
   end Rcheck_25;
1116
 
1117
   procedure Rcheck_26 (File : System.Address; Line : Integer) is
1118
   begin
1119
      Raise_Program_Error_Msg (File, Line, Rmsg_26'Address);
1120
   end Rcheck_26;
1121
 
1122
   procedure Rcheck_27 (File : System.Address; Line : Integer) is
1123
   begin
1124
      Raise_Program_Error_Msg (File, Line, Rmsg_27'Address);
1125
   end Rcheck_27;
1126
 
1127
   procedure Rcheck_28 (File : System.Address; Line : Integer) is
1128
   begin
1129
      Raise_Program_Error_Msg (File, Line, Rmsg_28'Address);
1130
   end Rcheck_28;
1131
 
1132
   procedure Rcheck_29 (File : System.Address; Line : Integer) is
1133
   begin
1134
      Raise_Program_Error_Msg (File, Line, Rmsg_29'Address);
1135
   end Rcheck_29;
1136
 
1137
   procedure Rcheck_30 (File : System.Address; Line : Integer) is
1138
   begin
1139
      Raise_Storage_Error_Msg (File, Line, Rmsg_30'Address);
1140
   end Rcheck_30;
1141
 
1142
   procedure Rcheck_31 (File : System.Address; Line : Integer) is
1143
   begin
1144
      Raise_Storage_Error_Msg (File, Line, Rmsg_31'Address);
1145
   end Rcheck_31;
1146
 
1147
   procedure Rcheck_32 (File : System.Address; Line : Integer) is
1148
   begin
1149
      Raise_Storage_Error_Msg (File, Line, Rmsg_32'Address);
1150
   end Rcheck_32;
1151
 
1152
   procedure Rcheck_33 (File : System.Address; Line : Integer) is
1153
   begin
1154
      Raise_Storage_Error_Msg (File, Line, Rmsg_33'Address);
1155
   end Rcheck_33;
1156
 
1157
   -------------
1158
   -- Reraise --
1159
   -------------
1160
 
1161
   procedure Reraise is
1162
      Excep : constant EOA := Get_Current_Excep.all;
1163
 
1164
   begin
1165
      Abort_Defer.all;
1166
      Raise_Current_Excep (Excep.Id);
1167
   end Reraise;
1168
 
1169
   ------------------------
1170
   -- Reraise_Occurrence --
1171
   ------------------------
1172
 
1173
   procedure Reraise_Occurrence (X : Exception_Occurrence) is
1174
   begin
1175
      if X.Id /= null then
1176
         Abort_Defer.all;
1177
         Save_Occurrence_No_Private (Get_Current_Excep.all.all, X);
1178
         Raise_Current_Excep (X.Id);
1179
      end if;
1180
   end Reraise_Occurrence;
1181
 
1182
   -------------------------------
1183
   -- Reraise_Occurrence_Always --
1184
   -------------------------------
1185
 
1186
   procedure Reraise_Occurrence_Always (X : Exception_Occurrence) is
1187
   begin
1188
      Abort_Defer.all;
1189
      Save_Occurrence_No_Private (Get_Current_Excep.all.all, X);
1190
      Raise_Current_Excep (X.Id);
1191
   end Reraise_Occurrence_Always;
1192
 
1193
   ---------------------------------
1194
   -- Reraise_Occurrence_No_Defer --
1195
   ---------------------------------
1196
 
1197
   procedure Reraise_Occurrence_No_Defer (X : Exception_Occurrence) is
1198
   begin
1199
      Save_Occurrence_No_Private (Get_Current_Excep.all.all, X);
1200
      Raise_Current_Excep (X.Id);
1201
   end Reraise_Occurrence_No_Defer;
1202
 
1203
   ---------------------
1204
   -- Save_Occurrence --
1205
   ---------------------
1206
 
1207
   procedure Save_Occurrence
1208
     (Target : out Exception_Occurrence;
1209
      Source : Exception_Occurrence)
1210
   is
1211
   begin
1212
      Save_Occurrence_No_Private (Target, Source);
1213
   end Save_Occurrence;
1214
 
1215
   function Save_Occurrence (Source : Exception_Occurrence) return EOA is
1216
      Target : constant EOA := new Exception_Occurrence;
1217
   begin
1218
      Save_Occurrence (Target.all, Source);
1219
      return Target;
1220
   end Save_Occurrence;
1221
 
1222
   --------------------------------
1223
   -- Save_Occurrence_No_Private --
1224
   --------------------------------
1225
 
1226
   procedure Save_Occurrence_No_Private
1227
     (Target : out Exception_Occurrence;
1228
      Source : Exception_Occurrence)
1229
   is
1230
   begin
1231
      Target.Id             := Source.Id;
1232
      Target.Msg_Length     := Source.Msg_Length;
1233
      Target.Num_Tracebacks := Source.Num_Tracebacks;
1234
      Target.Pid            := Source.Pid;
1235
      Target.Cleanup_Flag   := Source.Cleanup_Flag;
1236
 
1237
      Target.Msg (1 .. Target.Msg_Length) :=
1238
        Source.Msg (1 .. Target.Msg_Length);
1239
 
1240
      Target.Tracebacks (1 .. Target.Num_Tracebacks) :=
1241
        Source.Tracebacks (1 .. Target.Num_Tracebacks);
1242
   end Save_Occurrence_No_Private;
1243
 
1244
   -------------------------
1245
   -- Transfer_Occurrence --
1246
   -------------------------
1247
 
1248
   procedure Transfer_Occurrence
1249
     (Target : Exception_Occurrence_Access;
1250
      Source : Exception_Occurrence)
1251
   is
1252
   begin
1253
      --  Setup Target as an exception to be propagated in the calling task
1254
      --  (rendezvous-wise), taking care not to clobber the associated private
1255
      --  data. Target is expected to be a pointer to the calling task's fixed
1256
      --  TSD occurrence, which is very different from Get_Current_Excep here
1257
      --  because this subprogram is called from the called task.
1258
 
1259
      Save_Occurrence_No_Private (Target.all, Source);
1260
   end Transfer_Occurrence;
1261
 
1262
   -------------------
1263
   -- String_To_EId --
1264
   -------------------
1265
 
1266
   function String_To_EId (S : String) return Exception_Id
1267
     renames Stream_Attributes.String_To_EId;
1268
 
1269
   ------------------
1270
   -- String_To_EO --
1271
   ------------------
1272
 
1273
   function String_To_EO (S : String) return Exception_Occurrence
1274
     renames Stream_Attributes.String_To_EO;
1275
 
1276
   ------------------------------
1277
   -- Raise_Exception_No_Defer --
1278
   ------------------------------
1279
 
1280
   procedure Raise_Exception_No_Defer
1281
     (E       : Exception_Id;
1282
      Message : String := "")
1283
   is
1284
   begin
1285
      Exception_Data.Set_Exception_Msg (E, Message);
1286
 
1287
      --  Do not call Abort_Defer.all, as specified by the spec
1288
 
1289
      Raise_Current_Excep (E);
1290
   end Raise_Exception_No_Defer;
1291
 
1292
   ---------------
1293
   -- To_Stderr --
1294
   ---------------
1295
 
1296
   procedure To_Stderr (C : Character) is
1297
      type int is new Integer;
1298
 
1299
      procedure put_char_stderr (C : int);
1300
      pragma Import (C, put_char_stderr, "put_char_stderr");
1301
 
1302
   begin
1303
      put_char_stderr (Character'Pos (C));
1304
   end To_Stderr;
1305
 
1306
   procedure To_Stderr (S : String) is
1307
   begin
1308
      for J in S'Range loop
1309
         if S (J) /= ASCII.CR then
1310
            To_Stderr (S (J));
1311
         end if;
1312
      end loop;
1313
   end To_Stderr;
1314
 
1315
end Ada.Exceptions;

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