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1 ------------------------------------------------------------------------------
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) 1992-2012, 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_Debug; use System.Exceptions_Debug;
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 Column : Integer := 0;
100 Msg2 : System.Address := System.Null_Address);
101 -- This routine is called to setup the exception referenced by the
102 -- Current_Excep field in the TSD to contain the indicated Id value
103 -- and message. Msg1 is a null terminated string which is generated
104 -- as the exception message. If line is non-zero, then a colon and
105 -- the decimal representation of this integer is appended to the
106 -- message. Ditto for Column. When Msg2 is non-null, a space and this
107 -- additional null terminated string is added to the message.
108
109 procedure Set_Exception_Msg
110 (Id : Exception_Id;
111 Message : String);
112 -- This routine is called to setup the exception referenced by the
113 -- Current_Excep field in the TSD to contain the indicated Id value and
114 -- message. Message is a string which is generated as the exception
115 -- message.
116
117 --------------------------------------
118 -- Exception information subprogram --
119 --------------------------------------
120
121 function Exception_Information (X : Exception_Occurrence) return String;
122 -- The format of the exception information is as follows:
123 --
124 -- Exception_Name: <exception name> (as in Exception_Name)
125 -- Message: <message> (only if Exception_Message is empty)
126 -- PID=nnnn (only if != 0)
127 -- Call stack traceback locations: (only if at least one location)
128 -- <0xyyyyyyyy 0xyyyyyyyy ...> (is recorded)
129 --
130 -- The lines are separated by a ASCII.LF character
131 --
132 -- The nnnn is the partition Id given as decimal digits
133 --
134 -- The 0x... line represents traceback program counter locations, in
135 -- execution order with the first one being the exception location. It
136 -- is present only
137 --
138 -- The Exception_Name and Message lines are omitted in the abort signal
139 -- case, since this is not really an exception.
140
141 -- Note: If the format of the generated string is changed, please note
142 -- that an equivalent modification to the routine String_To_EO must be
143 -- made to preserve proper functioning of the stream attributes.
144
145 ---------------------------------------
146 -- Exception backtracing subprograms --
147 ---------------------------------------
148
149 -- What is automatically output when exception tracing is on is the
150 -- usual exception information with the call chain backtrace possibly
151 -- tailored by a backtrace decorator. Modifying Exception_Information
152 -- itself is not a good idea because the decorated output is completely
153 -- out of control and would break all our code related to the streaming
154 -- of exceptions. We then provide an alternative function to compute
155 -- the possibly tailored output, which is equivalent if no decorator is
156 -- currently set:
157
158 function Tailored_Exception_Information
159 (X : Exception_Occurrence) return String;
160 -- Exception information to be output in the case of automatic tracing
161 -- requested through GNAT.Exception_Traces.
162 --
163 -- This is the same as Exception_Information if no backtrace decorator
164 -- is currently in place. Otherwise, this is Exception_Information with
165 -- the call chain raw addresses replaced by the result of a call to the
166 -- current decorator provided with the call chain addresses.
167
168 pragma Export
169 (Ada, Tailored_Exception_Information,
170 "__gnat_tailored_exception_information");
171 -- This is currently used by System.Tasking.Stages
172
173 end Exception_Data;
174
175 package Exception_Traces is
176
177 use Exception_Data;
178 -- Imports Tailored_Exception_Information
179
180 ----------------------------------------------
181 -- Run-Time Exception Notification Routines --
182 ----------------------------------------------
183
184 -- These subprograms provide a common run-time interface to trigger the
185 -- actions required when an exception is about to be propagated (e.g.
186 -- user specified actions or output of exception information). They are
187 -- exported to be usable by the Ada exception handling personality
188 -- routine when the GCC 3 mechanism is used.
189
190 procedure Notify_Handled_Exception;
191 pragma Export
192 (C, Notify_Handled_Exception, "__gnat_notify_handled_exception");
193 -- This routine is called for a handled occurrence is about to be
194 -- propagated.
195
196 procedure Notify_Unhandled_Exception;
197 pragma Export
198 (C, Notify_Unhandled_Exception, "__gnat_notify_unhandled_exception");
199 -- This routine is called when an unhandled occurrence is about to be
200 -- propagated.
201
202 procedure Unhandled_Exception_Terminate;
203 pragma No_Return (Unhandled_Exception_Terminate);
204 -- This procedure is called to terminate program execution following an
205 -- unhandled exception. The exception information, including traceback
206 -- if available is output, and execution is then terminated. Note that
207 -- at the point where this routine is called, the stack has typically
208 -- been destroyed.
209
210 end Exception_Traces;
211
212 package Stream_Attributes is
213
214 --------------------------------
215 -- Stream attributes routines --
216 --------------------------------
217
218 function EId_To_String (X : Exception_Id) return String;
219 function String_To_EId (S : String) return Exception_Id;
220 -- Functions for implementing Exception_Id stream attributes
221
222 function EO_To_String (X : Exception_Occurrence) return String;
223 function String_To_EO (S : String) return Exception_Occurrence;
224 -- Functions for implementing Exception_Occurrence stream
225 -- attributes
226
227 end Stream_Attributes;
228
229 procedure Raise_Current_Excep (E : Exception_Id);
230 pragma No_Return (Raise_Current_Excep);
231 pragma Export (C, Raise_Current_Excep, "__gnat_raise_nodefer_with_msg");
232 -- This is a simple wrapper to Process_Raise_Exception.
233 --
234 -- This external name for Raise_Current_Excep is historical, and probably
235 -- should be changed but for now we keep it, because gdb and gigi know
236 -- about it.
237
238 procedure Raise_Exception_No_Defer
239 (E : Exception_Id; Message : String := "");
240 pragma Export
241 (Ada, Raise_Exception_No_Defer,
242 "ada__exceptions__raise_exception_no_defer");
243 pragma No_Return (Raise_Exception_No_Defer);
244 -- Similar to Raise_Exception, but with no abort deferral
245
246 procedure Raise_With_Msg (E : Exception_Id);
247 pragma No_Return (Raise_With_Msg);
248 pragma Export (C, Raise_With_Msg, "__gnat_raise_with_msg");
249 -- Raises an exception with given exception id value. A message is
250 -- associated with the raise, and has already been stored in the exception
251 -- occurrence referenced by the Current_Excep in the TSD. Abort is deferred
252 -- before the raise call.
253
254 procedure Raise_With_Location_And_Msg
255 (E : Exception_Id;
256 F : System.Address;
257 L : Integer;
258 M : System.Address := System.Null_Address);
259 pragma No_Return (Raise_With_Location_And_Msg);
260 -- Raise an exception with given exception id value. A filename and line
261 -- number is associated with the raise and is stored in the exception
262 -- occurrence and in addition a string message M is appended to this
263 -- if M is not null.
264
265 procedure Raise_Constraint_Error
266 (File : System.Address;
267 Line : Integer);
268 pragma No_Return (Raise_Constraint_Error);
269 pragma Export
270 (C, Raise_Constraint_Error, "__gnat_raise_constraint_error");
271 -- Raise constraint error with file:line information
272
273 procedure Raise_Constraint_Error_Msg
274 (File : System.Address;
275 Line : Integer;
276 Msg : System.Address);
277 pragma No_Return (Raise_Constraint_Error_Msg);
278 pragma Export
279 (C, Raise_Constraint_Error_Msg, "__gnat_raise_constraint_error_msg");
280 -- Raise constraint error with file:line + msg information
281
282 procedure Raise_Program_Error
283 (File : System.Address;
284 Line : Integer);
285 pragma No_Return (Raise_Program_Error);
286 pragma Export
287 (C, Raise_Program_Error, "__gnat_raise_program_error");
288 -- Raise program error with file:line information
289
290 procedure Raise_Program_Error_Msg
291 (File : System.Address;
292 Line : Integer;
293 Msg : System.Address);
294 pragma No_Return (Raise_Program_Error_Msg);
295 pragma Export
296 (C, Raise_Program_Error_Msg, "__gnat_raise_program_error_msg");
297 -- Raise program error with file:line + msg information
298
299 procedure Raise_Storage_Error
300 (File : System.Address;
301 Line : Integer);
302 pragma No_Return (Raise_Storage_Error);
303 pragma Export
304 (C, Raise_Storage_Error, "__gnat_raise_storage_error");
305 -- Raise storage error with file:line information
306
307 procedure Raise_Storage_Error_Msg
308 (File : System.Address;
309 Line : Integer;
310 Msg : System.Address);
311 pragma No_Return (Raise_Storage_Error_Msg);
312 pragma Export
313 (C, Raise_Storage_Error_Msg, "__gnat_raise_storage_error_msg");
314 -- Raise storage error with file:line + reason msg information
315
316 -- The exception raising process and the automatic tracing mechanism rely
317 -- on some careful use of flags attached to the exception occurrence. The
318 -- graph below illustrates the relations between the Raise_ subprograms
319 -- and identifies the points where basic flags such as Exception_Raised
320 -- are initialized.
321 --
322 -- (i) signs indicate the flags initialization points. R stands for Raise,
323 -- W for With, and E for Exception.
324 --
325 -- R_No_Msg R_E R_Pe R_Ce R_Se
326 -- | | | | |
327 -- +--+ +--+ +---+ | +---+
328 -- | | | | |
329 -- R_E_No_Defer(i) R_W_Msg(i) R_W_Loc
330 -- | | | |
331 -- +------------+ | +-----------+ +--+
332 -- | | | |
333 -- | | | Set_E_C_Msg(i)
334 -- | | |
335 -- Raise_Current_Excep
336
337 procedure Reraise;
338 pragma No_Return (Reraise);
339 pragma Export (C, Reraise, "__gnat_reraise");
340 -- Reraises the exception referenced by the Current_Excep field of the TSD
341 -- (all fields of this exception occurrence are set). Abort is deferred
342 -- before the reraise operation.
343
344 procedure Transfer_Occurrence
345 (Target : Exception_Occurrence_Access;
346 Source : Exception_Occurrence);
347 pragma Export (C, Transfer_Occurrence, "__gnat_transfer_occurrence");
348 -- Called from System.Tasking.RendezVous.Exceptional_Complete_RendezVous
349 -- to setup Target from Source as an exception to be propagated in the
350 -- caller task. Target is expected to be a pointer to the fixed TSD
351 -- occurrence for this task.
352
353 -----------------------------
354 -- Run-Time Check Routines --
355 -----------------------------
356
357 -- Routines to a specific exception with a reason message attached. The
358 -- parameters are the file name and line number in each case. The names are
359 -- keyed to the codes defined in types.ads and a-types.h (for example, the
360 -- name Rcheck_05 refers to the Reason RT_Exception_Code'Val (5)).
361
362 procedure Rcheck_00 (File : System.Address; Line : Integer);
363 procedure Rcheck_01 (File : System.Address; Line : Integer);
364 procedure Rcheck_02 (File : System.Address; Line : Integer);
365 procedure Rcheck_03 (File : System.Address; Line : Integer);
366 procedure Rcheck_04 (File : System.Address; Line : Integer);
367 procedure Rcheck_05 (File : System.Address; Line : Integer);
368 procedure Rcheck_06 (File : System.Address; Line : Integer);
369 procedure Rcheck_07 (File : System.Address; Line : Integer);
370 procedure Rcheck_08 (File : System.Address; Line : Integer);
371 procedure Rcheck_09 (File : System.Address; Line : Integer);
372 procedure Rcheck_10 (File : System.Address; Line : Integer);
373 procedure Rcheck_11 (File : System.Address; Line : Integer);
374 procedure Rcheck_12 (File : System.Address; Line : Integer);
375 procedure Rcheck_13 (File : System.Address; Line : Integer);
376 procedure Rcheck_14 (File : System.Address; Line : Integer);
377 procedure Rcheck_15 (File : System.Address; Line : Integer);
378 procedure Rcheck_16 (File : System.Address; Line : Integer);
379 procedure Rcheck_17 (File : System.Address; Line : Integer);
380 procedure Rcheck_18 (File : System.Address; Line : Integer);
381 procedure Rcheck_19 (File : System.Address; Line : Integer);
382 procedure Rcheck_20 (File : System.Address; Line : Integer);
383 procedure Rcheck_21 (File : System.Address; Line : Integer);
384 procedure Rcheck_23 (File : System.Address; Line : Integer);
385 procedure Rcheck_24 (File : System.Address; Line : Integer);
386 procedure Rcheck_25 (File : System.Address; Line : Integer);
387 procedure Rcheck_26 (File : System.Address; Line : Integer);
388 procedure Rcheck_27 (File : System.Address; Line : Integer);
389 procedure Rcheck_28 (File : System.Address; Line : Integer);
390 procedure Rcheck_29 (File : System.Address; Line : Integer);
391 procedure Rcheck_30 (File : System.Address; Line : Integer);
392 procedure Rcheck_31 (File : System.Address; Line : Integer);
393 procedure Rcheck_32 (File : System.Address; Line : Integer);
394 procedure Rcheck_33 (File : System.Address; Line : Integer);
395 procedure Rcheck_34 (File : System.Address; Line : Integer);
396
397 procedure Rcheck_22 (File : System.Address; Line : Integer);
398 -- This routine is separated out because it has quite different behavior
399 -- from the others. This is the "finalize/adjust raised exception". This
400 -- subprogram is always called with abort deferred, unlike all other
401 -- Rcheck_* routines, it needs to call Raise_Exception_No_Defer.
402 --
403 -- It should probably have a distinguished name ???
404
405 pragma Export (C, Rcheck_00, "__gnat_rcheck_00");
406 pragma Export (C, Rcheck_01, "__gnat_rcheck_01");
407 pragma Export (C, Rcheck_02, "__gnat_rcheck_02");
408 pragma Export (C, Rcheck_03, "__gnat_rcheck_03");
409 pragma Export (C, Rcheck_04, "__gnat_rcheck_04");
410 pragma Export (C, Rcheck_05, "__gnat_rcheck_05");
411 pragma Export (C, Rcheck_06, "__gnat_rcheck_06");
412 pragma Export (C, Rcheck_07, "__gnat_rcheck_07");
413 pragma Export (C, Rcheck_08, "__gnat_rcheck_08");
414 pragma Export (C, Rcheck_09, "__gnat_rcheck_09");
415 pragma Export (C, Rcheck_10, "__gnat_rcheck_10");
416 pragma Export (C, Rcheck_11, "__gnat_rcheck_11");
417 pragma Export (C, Rcheck_12, "__gnat_rcheck_12");
418 pragma Export (C, Rcheck_13, "__gnat_rcheck_13");
419 pragma Export (C, Rcheck_14, "__gnat_rcheck_14");
420 pragma Export (C, Rcheck_15, "__gnat_rcheck_15");
421 pragma Export (C, Rcheck_16, "__gnat_rcheck_16");
422 pragma Export (C, Rcheck_17, "__gnat_rcheck_17");
423 pragma Export (C, Rcheck_18, "__gnat_rcheck_18");
424 pragma Export (C, Rcheck_19, "__gnat_rcheck_19");
425 pragma Export (C, Rcheck_20, "__gnat_rcheck_20");
426 pragma Export (C, Rcheck_21, "__gnat_rcheck_21");
427 pragma Export (C, Rcheck_22, "__gnat_rcheck_22");
428 pragma Export (C, Rcheck_23, "__gnat_rcheck_23");
429 pragma Export (C, Rcheck_24, "__gnat_rcheck_24");
430 pragma Export (C, Rcheck_25, "__gnat_rcheck_25");
431 pragma Export (C, Rcheck_26, "__gnat_rcheck_26");
432 pragma Export (C, Rcheck_27, "__gnat_rcheck_27");
433 pragma Export (C, Rcheck_28, "__gnat_rcheck_28");
434 pragma Export (C, Rcheck_29, "__gnat_rcheck_29");
435 pragma Export (C, Rcheck_30, "__gnat_rcheck_30");
436 pragma Export (C, Rcheck_31, "__gnat_rcheck_31");
437 pragma Export (C, Rcheck_32, "__gnat_rcheck_32");
438 pragma Export (C, Rcheck_33, "__gnat_rcheck_33");
439 pragma Export (C, Rcheck_34, "__gnat_rcheck_34");
440
441 -- None of these procedures ever returns (they raise an exception!). By
442 -- using pragma No_Return, we ensure that any junk code after the call,
443 -- such as normal return epilog stuff, can be eliminated).
444
445 pragma No_Return (Rcheck_00);
446 pragma No_Return (Rcheck_01);
447 pragma No_Return (Rcheck_02);
448 pragma No_Return (Rcheck_03);
449 pragma No_Return (Rcheck_04);
450 pragma No_Return (Rcheck_05);
451 pragma No_Return (Rcheck_06);
452 pragma No_Return (Rcheck_07);
453 pragma No_Return (Rcheck_08);
454 pragma No_Return (Rcheck_09);
455 pragma No_Return (Rcheck_10);
456 pragma No_Return (Rcheck_11);
457 pragma No_Return (Rcheck_12);
458 pragma No_Return (Rcheck_13);
459 pragma No_Return (Rcheck_14);
460 pragma No_Return (Rcheck_15);
461 pragma No_Return (Rcheck_16);
462 pragma No_Return (Rcheck_17);
463 pragma No_Return (Rcheck_18);
464 pragma No_Return (Rcheck_19);
465 pragma No_Return (Rcheck_20);
466 pragma No_Return (Rcheck_21);
467 pragma No_Return (Rcheck_22);
468 pragma No_Return (Rcheck_23);
469 pragma No_Return (Rcheck_24);
470 pragma No_Return (Rcheck_25);
471 pragma No_Return (Rcheck_26);
472 pragma No_Return (Rcheck_27);
473 pragma No_Return (Rcheck_28);
474 pragma No_Return (Rcheck_29);
475 pragma No_Return (Rcheck_30);
476 pragma No_Return (Rcheck_32);
477 pragma No_Return (Rcheck_33);
478 pragma No_Return (Rcheck_34);
479
480 ---------------------------------------------
481 -- Reason Strings for Run-Time Check Calls --
482 ---------------------------------------------
483
484 -- These strings are null-terminated and are used by Rcheck_nn. The
485 -- strings correspond to the definitions for Types.RT_Exception_Code.
486
487 use ASCII;
488
489 Rmsg_00 : constant String := "access check failed" & NUL;
490 Rmsg_01 : constant String := "access parameter is null" & NUL;
491 Rmsg_02 : constant String := "discriminant check failed" & NUL;
492 Rmsg_03 : constant String := "divide by zero" & NUL;
493 Rmsg_04 : constant String := "explicit raise" & NUL;
494 Rmsg_05 : constant String := "index check failed" & NUL;
495 Rmsg_06 : constant String := "invalid data" & NUL;
496 Rmsg_07 : constant String := "length check failed" & NUL;
497 Rmsg_08 : constant String := "null Exception_Id" & NUL;
498 Rmsg_09 : constant String := "null-exclusion check failed" & NUL;
499 Rmsg_10 : constant String := "overflow check failed" & NUL;
500 Rmsg_11 : constant String := "partition check failed" & NUL;
501 Rmsg_12 : constant String := "range check failed" & NUL;
502 Rmsg_13 : constant String := "tag check failed" & NUL;
503 Rmsg_14 : constant String := "access before elaboration" & NUL;
504 Rmsg_15 : constant String := "accessibility check failed" & NUL;
505 Rmsg_16 : constant String := "attempt to take address of" &
506 " intrinsic subprogram" & NUL;
507 Rmsg_17 : constant String := "all guards closed" & NUL;
508 Rmsg_18 : constant String := "improper use of generic subtype" &
509 " with predicate" & NUL;
510 Rmsg_19 : constant String := "Current_Task referenced in entry" &
511 " body" & NUL;
512 Rmsg_20 : constant String := "duplicated entry address" & NUL;
513 Rmsg_21 : constant String := "explicit raise" & NUL;
514 Rmsg_22 : constant String := "finalize/adjust raised exception" & NUL;
515 Rmsg_23 : constant String := "implicit return with No_Return" & NUL;
516 Rmsg_24 : constant String := "misaligned address value" & NUL;
517 Rmsg_25 : constant String := "missing return" & NUL;
518 Rmsg_26 : constant String := "overlaid controlled object" & NUL;
519 Rmsg_27 : constant String := "potentially blocking operation" & NUL;
520 Rmsg_28 : constant String := "stubbed subprogram called" & NUL;
521 Rmsg_29 : constant String := "unchecked union restriction" & NUL;
522 Rmsg_30 : constant String := "actual/returned class-wide" &
523 " value not transportable" & NUL;
524 Rmsg_31 : constant String := "empty storage pool" & NUL;
525 Rmsg_32 : constant String := "explicit raise" & NUL;
526 Rmsg_33 : constant String := "infinite recursion" & NUL;
527 Rmsg_34 : constant String := "object too large" & NUL;
528
529 -----------------------
530 -- Polling Interface --
531 -----------------------
532
533 type Unsigned is mod 2 ** 32;
534
535 Counter : Unsigned := 0;
536 pragma Warnings (Off, Counter);
537 -- This counter is provided for convenience. It can be used in Poll to
538 -- perform periodic but not systematic operations.
539
540 procedure Poll is separate;
541 -- The actual polling routine is separate, so that it can easily be
542 -- replaced with a target dependent version.
543
544 ------------------------------
545 -- Current_Target_Exception --
546 ------------------------------
547
548 function Current_Target_Exception return Exception_Occurrence is
549 begin
550 return Null_Occurrence;
551 end Current_Target_Exception;
552
553 -------------------
554 -- EId_To_String --
555 -------------------
556
557 function EId_To_String (X : Exception_Id) return String
558 renames Stream_Attributes.EId_To_String;
559
560 ------------------
561 -- EO_To_String --
562 ------------------
563
564 -- We use the null string to represent the null occurrence, otherwise we
565 -- output the Exception_Information string for the occurrence.
566
567 function EO_To_String (X : Exception_Occurrence) return String
568 renames Stream_Attributes.EO_To_String;
569
570 ------------------------
571 -- Exception_Identity --
572 ------------------------
573
574 function Exception_Identity
575 (X : Exception_Occurrence) return Exception_Id
576 is
577 begin
578 -- Note that the following test used to be here for the original Ada 95
579 -- semantics, but these were modified by AI-241 to require returning
580 -- Null_Id instead of raising Constraint_Error.
581
582 -- if X.Id = Null_Id then
583 -- raise Constraint_Error;
584 -- end if;
585
586 return X.Id;
587 end Exception_Identity;
588
589 ---------------------------
590 -- Exception_Information --
591 ---------------------------
592
593 function Exception_Information (X : Exception_Occurrence) return String is
594 begin
595 if X.Id = Null_Id then
596 raise Constraint_Error;
597 end if;
598
599 return Exception_Data.Exception_Information (X);
600 end Exception_Information;
601
602 -----------------------
603 -- Exception_Message --
604 -----------------------
605
606 function Exception_Message (X : Exception_Occurrence) return String is
607 begin
608 if X.Id = Null_Id then
609 raise Constraint_Error;
610 end if;
611
612 return X.Msg (1 .. X.Msg_Length);
613 end Exception_Message;
614
615 --------------------
616 -- Exception_Name --
617 --------------------
618
619 function Exception_Name (Id : Exception_Id) return String is
620 begin
621 if Id = null then
622 raise Constraint_Error;
623 end if;
624
625 return To_Ptr (Id.Full_Name) (1 .. Id.Name_Length - 1);
626 end Exception_Name;
627
628 function Exception_Name (X : Exception_Occurrence) return String is
629 begin
630 return Exception_Name (X.Id);
631 end Exception_Name;
632
633 ---------------------------
634 -- Exception_Name_Simple --
635 ---------------------------
636
637 function Exception_Name_Simple (X : Exception_Occurrence) return String is
638 Name : constant String := Exception_Name (X);
639 P : Natural;
640
641 begin
642 P := Name'Length;
643 while P > 1 loop
644 exit when Name (P - 1) = '.';
645 P := P - 1;
646 end loop;
647
648 -- Return result making sure lower bound is 1
649
650 declare
651 subtype Rname is String (1 .. Name'Length - P + 1);
652 begin
653 return Rname (Name (P .. Name'Length));
654 end;
655 end Exception_Name_Simple;
656
657 --------------------
658 -- Exception_Data --
659 --------------------
660
661 package body Exception_Data is separate;
662 -- This package can be easily dummied out if we do not want the basic
663 -- support for exception messages (such as in Ada 83).
664
665 ----------------------
666 -- Exception_Traces --
667 ----------------------
668
669 package body Exception_Traces is separate;
670 -- Depending on the underlying support for IO the implementation will
671 -- differ. Moreover we would like to dummy out this package in case we do
672 -- not want any exception tracing support. This is why this package is
673 -- separated.
674
675 -----------------------
676 -- Stream Attributes --
677 -----------------------
678
679 package body Stream_Attributes is separate;
680 -- This package can be easily dummied out if we do not want the
681 -- support for streaming Exception_Ids and Exception_Occurrences.
682
683 -----------------------------
684 -- Process_Raise_Exception --
685 -----------------------------
686
687 procedure Process_Raise_Exception (E : Exception_Id) is
688 pragma Inspection_Point (E);
689 -- This is so the debugger can reliably inspect the parameter
690
691 Jumpbuf_Ptr : constant Address := Get_Jmpbuf_Address.all;
692 Excep : constant EOA := Get_Current_Excep.all;
693
694 procedure builtin_longjmp (buffer : Address; Flag : Integer);
695 pragma No_Return (builtin_longjmp);
696 pragma Import (C, builtin_longjmp, "_gnat_builtin_longjmp");
697
698 begin
699 -- WARNING: There should be no exception handler for this body because
700 -- this would cause gigi to prepend a setup for a new jmpbuf to the
701 -- sequence of statements in case of built-in sjljl. We would then
702 -- always get this new buf in Jumpbuf_Ptr instead of the one for the
703 -- exception we are handling, which would completely break the whole
704 -- design of this procedure.
705
706 -- If the jump buffer pointer is non-null, transfer control using it.
707 -- Otherwise announce an unhandled exception (note that this means that
708 -- we have no finalizations to do other than at the outer level).
709 -- Perform the necessary notification tasks in both cases.
710
711 if Jumpbuf_Ptr /= Null_Address then
712 if not Excep.Exception_Raised then
713 Excep.Exception_Raised := True;
714 Exception_Traces.Notify_Handled_Exception;
715 end if;
716
717 builtin_longjmp (Jumpbuf_Ptr, 1);
718
719 else
720 Exception_Traces.Notify_Unhandled_Exception;
721 Exception_Traces.Unhandled_Exception_Terminate;
722 end if;
723 end Process_Raise_Exception;
724
725 ----------------------------
726 -- Raise_Constraint_Error --
727 ----------------------------
728
729 procedure Raise_Constraint_Error
730 (File : System.Address;
731 Line : Integer)
732 is
733 begin
734 Raise_With_Location_And_Msg
735 (Constraint_Error_Def'Access, File, Line);
736 end Raise_Constraint_Error;
737
738 --------------------------------
739 -- Raise_Constraint_Error_Msg --
740 --------------------------------
741
742 procedure Raise_Constraint_Error_Msg
743 (File : System.Address;
744 Line : Integer;
745 Msg : System.Address)
746 is
747 begin
748 Raise_With_Location_And_Msg
749 (Constraint_Error_Def'Access, File, Line, Msg);
750 end Raise_Constraint_Error_Msg;
751
752 -------------------------
753 -- Raise_Current_Excep --
754 -------------------------
755
756 procedure Raise_Current_Excep (E : Exception_Id) is
757
758 pragma Inspection_Point (E);
759 -- This is so the debugger can reliably inspect the parameter when
760 -- inserting a breakpoint at the start of this procedure.
761
762 Id : Exception_Id := E;
763 pragma Volatile (Id);
764 pragma Warnings (Off, Id);
765 -- In order to provide support for breakpoints on unhandled exceptions,
766 -- the debugger will also need to be able to inspect the value of E from
767 -- another (inner) frame. So we need to make sure that if E is passed in
768 -- a register, its value is also spilled on stack. For this, we store
769 -- the parameter value in a local variable, and add a pragma Volatile to
770 -- make sure it is spilled. The pragma Warnings (Off) is needed because
771 -- the compiler knows that Id is not referenced and that this use of
772 -- pragma Volatile is peculiar!
773
774 begin
775 Debug_Raise_Exception (E => SSL.Exception_Data_Ptr (E));
776 Process_Raise_Exception (E);
777 end Raise_Current_Excep;
778
779 ---------------------
780 -- Raise_Exception --
781 ---------------------
782
783 procedure Raise_Exception
784 (E : Exception_Id;
785 Message : String := "")
786 is
787 EF : Exception_Id := E;
788
789 begin
790 -- Raise CE if E = Null_ID (AI-446)
791
792 if E = null then
793 EF := Constraint_Error'Identity;
794 end if;
795
796 -- Go ahead and raise appropriate exception
797
798 Exception_Data.Set_Exception_Msg (EF, Message);
799 Abort_Defer.all;
800 Raise_Current_Excep (EF);
801 end Raise_Exception;
802
803 ----------------------------
804 -- Raise_Exception_Always --
805 ----------------------------
806
807 procedure Raise_Exception_Always
808 (E : Exception_Id;
809 Message : String := "")
810 is
811 begin
812 Exception_Data.Set_Exception_Msg (E, Message);
813 Abort_Defer.all;
814 Raise_Current_Excep (E);
815 end Raise_Exception_Always;
816
817 ------------------------------
818 -- Raise_Exception_No_Defer --
819 ------------------------------
820
821 procedure Raise_Exception_No_Defer
822 (E : Exception_Id;
823 Message : String := "")
824 is
825 begin
826 Exception_Data.Set_Exception_Msg (E, Message);
827
828 -- Do not call Abort_Defer.all, as specified by the spec
829
830 Raise_Current_Excep (E);
831 end Raise_Exception_No_Defer;
832
833 -------------------------------------
834 -- Raise_From_Controlled_Operation --
835 -------------------------------------
836
837 procedure Raise_From_Controlled_Operation
838 (X : Ada.Exceptions.Exception_Occurrence)
839 is
840 Prefix : constant String := "adjust/finalize raised ";
841 Orig_Msg : constant String := Exception_Message (X);
842 Orig_Prefix_Length : constant Natural :=
843 Integer'Min (Prefix'Length, Orig_Msg'Length);
844 Orig_Prefix : String renames Orig_Msg
845 (Orig_Msg'First ..
846 Orig_Msg'First + Orig_Prefix_Length - 1);
847 begin
848 -- Message already has proper prefix, just re-reraise
849
850 if Orig_Prefix = Prefix then
851 Raise_Exception_No_Defer
852 (E => Program_Error'Identity,
853 Message => Orig_Msg);
854
855 else
856 declare
857 New_Msg : constant String := Prefix & Exception_Name (X);
858
859 begin
860 -- No message present, just provide our own
861
862 if Orig_Msg = "" then
863 Raise_Exception_No_Defer
864 (E => Program_Error'Identity,
865 Message => New_Msg);
866
867 -- Message present, add informational prefix
868
869 else
870 Raise_Exception_No_Defer
871 (E => Program_Error'Identity,
872 Message => New_Msg & ": " & Orig_Msg);
873 end if;
874 end;
875 end if;
876 end Raise_From_Controlled_Operation;
877
878 -------------------------------
879 -- Raise_From_Signal_Handler --
880 -------------------------------
881
882 procedure Raise_From_Signal_Handler
883 (E : Exception_Id;
884 M : System.Address)
885 is
886 begin
887 Exception_Data.Set_Exception_C_Msg (E, M);
888 Abort_Defer.all;
889 Process_Raise_Exception (E);
890 end Raise_From_Signal_Handler;
891
892 -------------------------
893 -- Raise_Program_Error --
894 -------------------------
895
896 procedure Raise_Program_Error
897 (File : System.Address;
898 Line : Integer)
899 is
900 begin
901 Raise_With_Location_And_Msg
902 (Program_Error_Def'Access, File, Line);
903 end Raise_Program_Error;
904
905 -----------------------------
906 -- Raise_Program_Error_Msg --
907 -----------------------------
908
909 procedure Raise_Program_Error_Msg
910 (File : System.Address;
911 Line : Integer;
912 Msg : System.Address)
913 is
914 begin
915 Raise_With_Location_And_Msg
916 (Program_Error_Def'Access, File, Line, Msg);
917 end Raise_Program_Error_Msg;
918
919 -------------------------
920 -- Raise_Storage_Error --
921 -------------------------
922
923 procedure Raise_Storage_Error
924 (File : System.Address;
925 Line : Integer)
926 is
927 begin
928 Raise_With_Location_And_Msg
929 (Storage_Error_Def'Access, File, Line);
930 end Raise_Storage_Error;
931
932 -----------------------------
933 -- Raise_Storage_Error_Msg --
934 -----------------------------
935
936 procedure Raise_Storage_Error_Msg
937 (File : System.Address;
938 Line : Integer;
939 Msg : System.Address)
940 is
941 begin
942 Raise_With_Location_And_Msg
943 (Storage_Error_Def'Access, File, Line, Msg);
944 end Raise_Storage_Error_Msg;
945
946 ---------------------------------
947 -- Raise_With_Location_And_Msg --
948 ---------------------------------
949
950 procedure Raise_With_Location_And_Msg
951 (E : Exception_Id;
952 F : System.Address;
953 L : Integer;
954 M : System.Address := System.Null_Address)
955 is
956 begin
957 Exception_Data.Set_Exception_C_Msg (E, F, L, Msg2 => M);
958 Abort_Defer.all;
959 Raise_Current_Excep (E);
960 end Raise_With_Location_And_Msg;
961
962 --------------------
963 -- Raise_With_Msg --
964 --------------------
965
966 procedure Raise_With_Msg (E : Exception_Id) is
967 Excep : constant EOA := Get_Current_Excep.all;
968
969 begin
970 Excep.Exception_Raised := False;
971 Excep.Id := E;
972 Excep.Num_Tracebacks := 0;
973 Excep.Pid := Local_Partition_ID;
974 Abort_Defer.all;
975 Raise_Current_Excep (E);
976 end Raise_With_Msg;
977
978 --------------------------------------
979 -- Calls to Run-Time Check Routines --
980 --------------------------------------
981
982 procedure Rcheck_00 (File : System.Address; Line : Integer) is
983 begin
984 Raise_Constraint_Error_Msg (File, Line, Rmsg_00'Address);
985 end Rcheck_00;
986
987 procedure Rcheck_01 (File : System.Address; Line : Integer) is
988 begin
989 Raise_Constraint_Error_Msg (File, Line, Rmsg_01'Address);
990 end Rcheck_01;
991
992 procedure Rcheck_02 (File : System.Address; Line : Integer) is
993 begin
994 Raise_Constraint_Error_Msg (File, Line, Rmsg_02'Address);
995 end Rcheck_02;
996
997 procedure Rcheck_03 (File : System.Address; Line : Integer) is
998 begin
999 Raise_Constraint_Error_Msg (File, Line, Rmsg_03'Address);
1000 end Rcheck_03;
1001
1002 procedure Rcheck_04 (File : System.Address; Line : Integer) is
1003 begin
1004 Raise_Constraint_Error_Msg (File, Line, Rmsg_04'Address);
1005 end Rcheck_04;
1006
1007 procedure Rcheck_05 (File : System.Address; Line : Integer) is
1008 begin
1009 Raise_Constraint_Error_Msg (File, Line, Rmsg_05'Address);
1010 end Rcheck_05;
1011
1012 procedure Rcheck_06 (File : System.Address; Line : Integer) is
1013 begin
1014 Raise_Constraint_Error_Msg (File, Line, Rmsg_06'Address);
1015 end Rcheck_06;
1016
1017 procedure Rcheck_07 (File : System.Address; Line : Integer) is
1018 begin
1019 Raise_Constraint_Error_Msg (File, Line, Rmsg_07'Address);
1020 end Rcheck_07;
1021
1022 procedure Rcheck_08 (File : System.Address; Line : Integer) is
1023 begin
1024 Raise_Constraint_Error_Msg (File, Line, Rmsg_08'Address);
1025 end Rcheck_08;
1026
1027 procedure Rcheck_09 (File : System.Address; Line : Integer) is
1028 begin
1029 Raise_Constraint_Error_Msg (File, Line, Rmsg_09'Address);
1030 end Rcheck_09;
1031
1032 procedure Rcheck_10 (File : System.Address; Line : Integer) is
1033 begin
1034 Raise_Constraint_Error_Msg (File, Line, Rmsg_10'Address);
1035 end Rcheck_10;
1036
1037 procedure Rcheck_11 (File : System.Address; Line : Integer) is
1038 begin
1039 Raise_Constraint_Error_Msg (File, Line, Rmsg_11'Address);
1040 end Rcheck_11;
1041
1042 procedure Rcheck_12 (File : System.Address; Line : Integer) is
1043 begin
1044 Raise_Constraint_Error_Msg (File, Line, Rmsg_12'Address);
1045 end Rcheck_12;
1046
1047 procedure Rcheck_13 (File : System.Address; Line : Integer) is
1048 begin
1049 Raise_Constraint_Error_Msg (File, Line, Rmsg_13'Address);
1050 end Rcheck_13;
1051
1052 procedure Rcheck_14 (File : System.Address; Line : Integer) is
1053 begin
1054 Raise_Program_Error_Msg (File, Line, Rmsg_14'Address);
1055 end Rcheck_14;
1056
1057 procedure Rcheck_15 (File : System.Address; Line : Integer) is
1058 begin
1059 Raise_Program_Error_Msg (File, Line, Rmsg_15'Address);
1060 end Rcheck_15;
1061
1062 procedure Rcheck_16 (File : System.Address; Line : Integer) is
1063 begin
1064 Raise_Program_Error_Msg (File, Line, Rmsg_16'Address);
1065 end Rcheck_16;
1066
1067 procedure Rcheck_17 (File : System.Address; Line : Integer) is
1068 begin
1069 Raise_Program_Error_Msg (File, Line, Rmsg_17'Address);
1070 end Rcheck_17;
1071
1072 procedure Rcheck_18 (File : System.Address; Line : Integer) is
1073 begin
1074 Raise_Program_Error_Msg (File, Line, Rmsg_18'Address);
1075 end Rcheck_18;
1076
1077 procedure Rcheck_19 (File : System.Address; Line : Integer) is
1078 begin
1079 Raise_Program_Error_Msg (File, Line, Rmsg_19'Address);
1080 end Rcheck_19;
1081
1082 procedure Rcheck_20 (File : System.Address; Line : Integer) is
1083 begin
1084 Raise_Program_Error_Msg (File, Line, Rmsg_20'Address);
1085 end Rcheck_20;
1086
1087 procedure Rcheck_21 (File : System.Address; Line : Integer) is
1088 begin
1089 Raise_Program_Error_Msg (File, Line, Rmsg_21'Address);
1090 end Rcheck_21;
1091
1092 procedure Rcheck_22 (File : System.Address; Line : Integer) is
1093 E : constant Exception_Id := Program_Error_Def'Access;
1094
1095 begin
1096 -- This is "finalize/adjust raised exception". This subprogram is always
1097 -- called with abort deferred, unlike all other Rcheck_* routines, it
1098 -- needs to call Raise_Exception_No_Defer.
1099
1100 -- This is consistent with Raise_From_Controlled_Operation
1101
1102 Exception_Data.Set_Exception_C_Msg (E, File, Line, 0, Rmsg_22'Address);
1103 Raise_Current_Excep (E);
1104 end Rcheck_22;
1105
1106 procedure Rcheck_23 (File : System.Address; Line : Integer) is
1107 begin
1108 Raise_Program_Error_Msg (File, Line, Rmsg_23'Address);
1109 end Rcheck_23;
1110
1111 procedure Rcheck_24 (File : System.Address; Line : Integer) is
1112 begin
1113 Raise_Program_Error_Msg (File, Line, Rmsg_24'Address);
1114 end Rcheck_24;
1115
1116 procedure Rcheck_25 (File : System.Address; Line : Integer) is
1117 begin
1118 Raise_Program_Error_Msg (File, Line, Rmsg_25'Address);
1119 end Rcheck_25;
1120
1121 procedure Rcheck_26 (File : System.Address; Line : Integer) is
1122 begin
1123 Raise_Program_Error_Msg (File, Line, Rmsg_26'Address);
1124 end Rcheck_26;
1125
1126 procedure Rcheck_27 (File : System.Address; Line : Integer) is
1127 begin
1128 Raise_Program_Error_Msg (File, Line, Rmsg_27'Address);
1129 end Rcheck_27;
1130
1131 procedure Rcheck_28 (File : System.Address; Line : Integer) is
1132 begin
1133 Raise_Program_Error_Msg (File, Line, Rmsg_28'Address);
1134 end Rcheck_28;
1135
1136 procedure Rcheck_29 (File : System.Address; Line : Integer) is
1137 begin
1138 Raise_Program_Error_Msg (File, Line, Rmsg_29'Address);
1139 end Rcheck_29;
1140
1141 procedure Rcheck_30 (File : System.Address; Line : Integer) is
1142 begin
1143 Raise_Program_Error_Msg (File, Line, Rmsg_30'Address);
1144 end Rcheck_30;
1145
1146 procedure Rcheck_31 (File : System.Address; Line : Integer) is
1147 begin
1148 Raise_Storage_Error_Msg (File, Line, Rmsg_31'Address);
1149 end Rcheck_31;
1150
1151 procedure Rcheck_32 (File : System.Address; Line : Integer) is
1152 begin
1153 Raise_Storage_Error_Msg (File, Line, Rmsg_32'Address);
1154 end Rcheck_32;
1155
1156 procedure Rcheck_33 (File : System.Address; Line : Integer) is
1157 begin
1158 Raise_Storage_Error_Msg (File, Line, Rmsg_33'Address);
1159 end Rcheck_33;
1160
1161 procedure Rcheck_34 (File : System.Address; Line : Integer) is
1162 begin
1163 Raise_Storage_Error_Msg (File, Line, Rmsg_34'Address);
1164 end Rcheck_34;
1165
1166 -------------
1167 -- Reraise --
1168 -------------
1169
1170 procedure Reraise is
1171 Excep : constant EOA := Get_Current_Excep.all;
1172
1173 begin
1174 Abort_Defer.all;
1175 Raise_Current_Excep (Excep.Id);
1176 end Reraise;
1177
1178 --------------------------------------
1179 -- Reraise_Library_Exception_If_Any --
1180 --------------------------------------
1181
1182 procedure Reraise_Library_Exception_If_Any is
1183 LE : Exception_Occurrence;
1184 begin
1185 if Library_Exception_Set then
1186 LE := Library_Exception;
1187 Raise_From_Controlled_Operation (LE);
1188 end if;
1189 end Reraise_Library_Exception_If_Any;
1190
1191 ------------------------
1192 -- Reraise_Occurrence --
1193 ------------------------
1194
1195 procedure Reraise_Occurrence (X : Exception_Occurrence) is
1196 begin
1197 if X.Id /= null then
1198 Abort_Defer.all;
1199 Save_Occurrence (Get_Current_Excep.all.all, X);
1200 Raise_Current_Excep (X.Id);
1201 end if;
1202 end Reraise_Occurrence;
1203
1204 -------------------------------
1205 -- Reraise_Occurrence_Always --
1206 -------------------------------
1207
1208 procedure Reraise_Occurrence_Always (X : Exception_Occurrence) is
1209 begin
1210 Abort_Defer.all;
1211 Save_Occurrence (Get_Current_Excep.all.all, X);
1212 Raise_Current_Excep (X.Id);
1213 end Reraise_Occurrence_Always;
1214
1215 ---------------------------------
1216 -- Reraise_Occurrence_No_Defer --
1217 ---------------------------------
1218
1219 procedure Reraise_Occurrence_No_Defer (X : Exception_Occurrence) is
1220 begin
1221 Save_Occurrence (Get_Current_Excep.all.all, X);
1222 Raise_Current_Excep (X.Id);
1223 end Reraise_Occurrence_No_Defer;
1224
1225 ---------------------
1226 -- Save_Occurrence --
1227 ---------------------
1228
1229 procedure Save_Occurrence
1230 (Target : out Exception_Occurrence;
1231 Source : Exception_Occurrence)
1232 is
1233 begin
1234 Target.Id := Source.Id;
1235 Target.Msg_Length := Source.Msg_Length;
1236 Target.Num_Tracebacks := Source.Num_Tracebacks;
1237 Target.Pid := Source.Pid;
1238
1239 Target.Msg (1 .. Target.Msg_Length) :=
1240 Source.Msg (1 .. Target.Msg_Length);
1241
1242 Target.Tracebacks (1 .. Target.Num_Tracebacks) :=
1243 Source.Tracebacks (1 .. Target.Num_Tracebacks);
1244 end Save_Occurrence;
1245
1246 function Save_Occurrence (Source : Exception_Occurrence) return EOA is
1247 Target : constant EOA := new Exception_Occurrence;
1248 begin
1249 Save_Occurrence (Target.all, Source);
1250 return Target;
1251 end Save_Occurrence;
1252
1253 -------------------
1254 -- String_To_EId --
1255 -------------------
1256
1257 function String_To_EId (S : String) return Exception_Id
1258 renames Stream_Attributes.String_To_EId;
1259
1260 ------------------
1261 -- String_To_EO --
1262 ------------------
1263
1264 function String_To_EO (S : String) return Exception_Occurrence
1265 renames Stream_Attributes.String_To_EO;
1266
1267 ---------------
1268 -- To_Stderr --
1269 ---------------
1270
1271 procedure To_Stderr (C : Character) is
1272 type int is new Integer;
1273
1274 procedure put_char_stderr (C : int);
1275 pragma Import (C, put_char_stderr, "put_char_stderr");
1276
1277 begin
1278 put_char_stderr (Character'Pos (C));
1279 end To_Stderr;
1280
1281 procedure To_Stderr (S : String) is
1282 begin
1283 for J in S'Range loop
1284 if S (J) /= ASCII.CR then
1285 To_Stderr (S (J));
1286 end if;
1287 end loop;
1288 end To_Stderr;
1289
1290 -------------------------
1291 -- Transfer_Occurrence --
1292 -------------------------
1293
1294 procedure Transfer_Occurrence
1295 (Target : Exception_Occurrence_Access;
1296 Source : Exception_Occurrence)
1297 is
1298 begin
1299 Save_Occurrence (Target.all, Source);
1300 end Transfer_Occurrence;
1301
1302 ------------------------
1303 -- Triggered_By_Abort --
1304 ------------------------
1305
1306 function Triggered_By_Abort return Boolean is
1307 Ex : constant Exception_Occurrence_Access := Get_Current_Excep.all;
1308 begin
1309 return Ex /= null
1310 and then Exception_Identity (Ex.all) = Standard'Abort_Signal'Identity;
1311 end Triggered_By_Abort;
1312
1313 end Ada.Exceptions;