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* tree-cfg.c (tree_find_edge_insert_loc): Handle naked RETURN_EXPR.
[official-gcc.git] / gcc / ada / a-except.adb
bloba676b91c2ed7d123a3f6762dd0016460f9adfe3b
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) 1992-2005 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 2, 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. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
21 -- --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
28 -- --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
31 -- --
32 ------------------------------------------------------------------------------
33
34 pragma Polling (Off);
35 -- We must turn polling off for this unit, because otherwise we get
36 -- elaboration circularities with System.Exception_Tables.
37
38 with System; use System;
39 with System.Standard_Library; use System.Standard_Library;
40 with System.Soft_Links; use System.Soft_Links;
41
42 package body Ada.Exceptions is
43
44 procedure builtin_longjmp (buffer : Address; Flag : Integer);
45 pragma No_Return (builtin_longjmp);
46 pragma Import (C, builtin_longjmp, "_gnat_builtin_longjmp");
47
48 pragma Suppress (All_Checks);
49 -- We definitely do not want exceptions occurring within this unit, or
50 -- we are in big trouble. If an exceptional situation does occur, better
51 -- that it not be raised, since raising it can cause confusing chaos.
52
53 Zero_Cost_Exceptions : Integer;
54 pragma Import (C, Zero_Cost_Exceptions, "__gl_zero_cost_exceptions");
55 -- Boolean indicating if we are handling exceptions using a zero cost
56 -- mechanism.
57 --
58 -- Note that although we currently do not support it, the GCC3 back-end
59 -- tables are also potentially useable for setjmp/longjmp processing.
60
61 -----------------------
62 -- Local Subprograms --
63 -----------------------
64
65 -- Note: the exported subprograms in this package body are called directly
66 -- from C clients using the given external name, even though they are not
67 -- technically visible in the Ada sense.
68
69 function Code_Address_For_AAA return System.Address;
70 function Code_Address_For_ZZZ return System.Address;
71 -- Return start and end of procedures in this package
72 --
73 -- These procedures are used to provide exclusion bounds in
74 -- calls to Call_Chain at exception raise points from this unit. The
75 -- purpose is to arrange for the exception tracebacks not to include
76 -- frames from routines involved in the raise process, as these are
77 -- meaningless from the user's standpoint.
78 --
79 -- For these bounds to be meaningful, we need to ensure that the object
80 -- code for the routines involved in processing a raise is located after
81 -- the object code Code_Address_For_AAA and before the object code
82 -- Code_Address_For_ZZZ. This will indeed be the case as long as the
83 -- following rules are respected:
84 --
85 -- 1) The bodies of the subprograms involved in processing a raise
86 -- are located after the body of Code_Address_For_AAA and before the
87 -- body of Code_Address_For_ZZZ.
88 --
89 -- 2) No pragma Inline applies to any of these subprograms, as this
90 -- could delay the corresponding assembly output until the end of
91 -- the unit.
92
93 procedure Call_Chain (Excep : EOA);
94 -- Store up to Max_Tracebacks in Excep, corresponding to the current
95 -- call chain.
96
97 procedure Process_Raise_Exception
98 (E : Exception_Id;
99 From_Signal_Handler : Boolean);
100 pragma No_Return (Process_Raise_Exception);
101 -- This is the lowest level raise routine. It raises the exception
102 -- referenced by Current_Excep.all in the TSD, without deferring abort
103 -- (the caller must ensure that abort is deferred on entry).
104 --
105 -- This is the common implementation for Raise_Current_Excep and
106 -- Raise_From_Signal_Handler. The origin of the call is indicated by the
107 -- From_Signal_Handler argument.
108
109 procedure To_Stderr (S : String);
110 pragma Export (Ada, To_Stderr, "__gnat_to_stderr");
111 -- Little routine to output string to stderr that is also used
112 -- in the tasking run time.
113
114 procedure To_Stderr (C : Character);
115 pragma Inline (To_Stderr);
116 pragma Export (Ada, To_Stderr, "__gnat_to_stderr_char");
117 -- Little routine to output a character to stderr, used by some of
118 -- the separate units below.
119
120 package Exception_Data is
121
122 ---------------------------------
123 -- Exception messages routines --
124 ---------------------------------
125
126 procedure Set_Exception_C_Msg
127 (Id : Exception_Id;
128 Msg1 : System.Address;
129 Line : Integer := 0;
130 Msg2 : System.Address := System.Null_Address);
131 -- This routine is called to setup the exception referenced by the
132 -- Current_Excep field in the TSD to contain the indicated Id value
133 -- and message. Msg1 is a null terminated string which is generated
134 -- as the exception message. If line is non-zero, then a colon and
135 -- the decimal representation of this integer is appended to the
136 -- message. When Msg2 is non-null, a space and this additional null
137 -- terminated string is added to the message.
138
139 procedure Set_Exception_Msg
140 (Id : Exception_Id;
141 Message : String);
142 -- This routine is called to setup the exception referenced by the
143 -- Current_Excep field in the TSD to contain the indicated Id value
144 -- and message. Message is a string which is generated as the
145 -- exception message.
146
147 --------------------------------------
148 -- Exception information subprogram --
149 --------------------------------------
150
151 function Exception_Information (X : Exception_Occurrence) return String;
152 -- The format of the exception information is as follows:
153 --
154 -- Exception_Name: <exception name> (as in Exception_Name)
155 -- Message: <message> (only if Exception_Message is empty)
156 -- PID=nnnn (only if != 0)
157 -- Call stack traceback locations: (only if at least one location)
158 -- <0xyyyyyyyy 0xyyyyyyyy ...> (is recorded)
159 --
160 -- The lines are separated by a ASCII.LF character.
161 -- The nnnn is the partition Id given as decimal digits.
162 -- The 0x... line represents traceback program counter locations, in
163 -- execution order with the first one being the exception location. It
164 -- is present only
165 --
166 -- The Exception_Name and Message lines are omitted in the abort
167 -- signal case, since this is not really an exception.
168
169 -- !! If the format of the generated string is changed, please note
170 -- !! that an equivalent modification to the routine String_To_EO must
171 -- !! be made to preserve proper functioning of the stream attributes.
172
173 ---------------------------------------
174 -- Exception backtracing subprograms --
175 ---------------------------------------
176
177 -- What is automatically output when exception tracing is on is the
178 -- usual exception information with the call chain backtrace possibly
179 -- tailored by a backtrace decorator. Modifying Exception_Information
180 -- itself is not a good idea because the decorated output is completely
181 -- out of control and would break all our code related to the streaming
182 -- of exceptions. We then provide an alternative function to compute
183 -- the possibly tailored output, which is equivalent if no decorator is
184 -- currently set:
185
186 function Tailored_Exception_Information
187 (X : Exception_Occurrence) return String;
188 -- Exception information to be output in the case of automatic tracing
189 -- requested through GNAT.Exception_Traces.
190 --
191 -- This is the same as Exception_Information if no backtrace decorator
192 -- is currently in place. Otherwise, this is Exception_Information with
193 -- the call chain raw addresses replaced by the result of a call to the
194 -- current decorator provided with the call chain addresses.
195
196 pragma Export
197 (Ada, Tailored_Exception_Information,
198 "__gnat_tailored_exception_information");
199 -- This is currently used by System.Tasking.Stages
200
201 end Exception_Data;
202
203 package Exception_Traces is
204
205 use Exception_Data;
206 -- Imports Tailored_Exception_Information
207
208 ----------------------------------------------
209 -- Run-Time Exception Notification Routines --
210 ----------------------------------------------
211
212 -- These subprograms provide a common run-time interface to trigger the
213 -- actions required when an exception is about to be propagated (e.g.
214 -- user specified actions or output of exception information). They are
215 -- exported to be usable by the Ada exception handling personality
216 -- routine when the GCC 3 mechanism is used.
217
218 procedure Notify_Handled_Exception;
219 pragma Export
220 (C, Notify_Handled_Exception, "__gnat_notify_handled_exception");
221 -- This routine is called for a handled occurrence is about to be
222 -- propagated.
223
224 procedure Notify_Unhandled_Exception;
225 pragma Export
226 (C, Notify_Unhandled_Exception, "__gnat_notify_unhandled_exception");
227 -- This routine is called when an unhandled occurrence is about to be
228 -- propagated.
229
230 procedure Unhandled_Exception_Terminate;
231 pragma No_Return (Unhandled_Exception_Terminate);
232 -- This procedure is called to terminate execution following an
233 -- unhandled exception. The exception information, including
234 -- traceback if available is output, and execution is then
235 -- terminated. Note that at the point where this routine is
236 -- called, the stack has typically been destroyed.
237
238 end Exception_Traces;
239
240 package Exception_Propagation is
241
242 use Exception_Traces;
243 -- Imports Notify_Unhandled_Exception and
244 -- Unhandled_Exception_Terminate
245
246 ------------------------------------
247 -- Exception propagation routines --
248 ------------------------------------
249
250 procedure Setup_Exception
251 (Excep : EOA;
252 Current : EOA;
253 Reraised : Boolean := False);
254 -- Perform the necessary operations to prepare the propagation of Excep
255 -- in a task where Current is the current occurrence. Excep is assumed
256 -- to be a valid (non null) pointer.
257 --
258 -- This should be called before any (re-)setting of the current
259 -- occurrence. Any such (re-)setting shall take care *not* to clobber
260 -- the Private_Data component.
261 --
262 -- Having Current provided as an argument (instead of retrieving it via
263 -- Get_Current_Excep internally) is required to allow one task to setup
264 -- an exception for another task, which is used by Transfer_Occurrence.
265
266 procedure Propagate_Exception (From_Signal_Handler : Boolean);
267 pragma No_Return (Propagate_Exception);
268 -- This procedure propagates the exception represented by the occurrence
269 -- referenced by Current_Excep in the TSD for the current task.
270
271 end Exception_Propagation;
272
273 package Stream_Attributes is
274
275 --------------------------------
276 -- Stream attributes routines --
277 --------------------------------
278
279 function EId_To_String (X : Exception_Id) return String;
280 function String_To_EId (S : String) return Exception_Id;
281 -- Functions for implementing Exception_Id stream attributes
282
283 function EO_To_String (X : Exception_Occurrence) return String;
284 function String_To_EO (S : String) return Exception_Occurrence;
285 -- Functions for implementing Exception_Occurrence stream
286 -- attributes
287
288 end Stream_Attributes;
289
290 procedure Raise_Current_Excep (E : Exception_Id);
291 pragma No_Return (Raise_Current_Excep);
292 pragma Export (C, Raise_Current_Excep, "__gnat_raise_nodefer_with_msg");
293 -- This is a simple wrapper to Process_Raise_Exception setting the
294 -- From_Signal_Handler argument to False.
295 --
296 -- This external name for Raise_Current_Excep is historical, and probably
297 -- should be changed but for now we keep it, because gdb and gigi know
298 -- about it.
299
300 procedure Raise_Exception_No_Defer
301 (E : Exception_Id; Message : String := "");
302 pragma Export
303 (Ada, Raise_Exception_No_Defer,
304 "ada__exceptions__raise_exception_no_defer");
305 pragma No_Return (Raise_Exception_No_Defer);
306 -- Similar to Raise_Exception, but with no abort deferral
307
308 procedure Raise_With_Msg (E : Exception_Id);
309 pragma No_Return (Raise_With_Msg);
310 pragma Export (C, Raise_With_Msg, "__gnat_raise_with_msg");
311 -- Raises an exception with given exception id value. A message
312 -- is associated with the raise, and has already been stored in the
313 -- exception occurrence referenced by the Current_Excep in the TSD.
314 -- Abort is deferred before the raise call.
315
316 procedure Raise_With_Location_And_Msg
317 (E : Exception_Id;
318 F : System.Address;
319 L : Integer;
320 M : System.Address := System.Null_Address);
321 pragma No_Return (Raise_With_Location_And_Msg);
322 -- Raise an exception with given exception id value. A filename and line
323 -- number is associated with the raise and is stored in the exception
324 -- occurrence and in addition a string message M is appended to
325 -- this (if M is not null).
326
327 procedure Raise_Constraint_Error
328 (File : System.Address;
329 Line : Integer);
330 pragma No_Return (Raise_Constraint_Error);
331 pragma Export
332 (C, Raise_Constraint_Error, "__gnat_raise_constraint_error");
333 -- Raise constraint error with file:line information
334
335 procedure Raise_Constraint_Error_Msg
336 (File : System.Address;
337 Line : Integer;
338 Msg : System.Address);
339 pragma No_Return (Raise_Constraint_Error_Msg);
340 pragma Export
341 (C, Raise_Constraint_Error_Msg, "__gnat_raise_constraint_error_msg");
342 -- Raise constraint error with file:line + msg information
343
344 procedure Raise_Program_Error
345 (File : System.Address;
346 Line : Integer);
347 pragma No_Return (Raise_Program_Error);
348 pragma Export
349 (C, Raise_Program_Error, "__gnat_raise_program_error");
350 -- Raise program error with file:line information
351
352 procedure Raise_Program_Error_Msg
353 (File : System.Address;
354 Line : Integer;
355 Msg : System.Address);
356 pragma No_Return (Raise_Program_Error_Msg);
357 pragma Export
358 (C, Raise_Program_Error_Msg, "__gnat_raise_program_error_msg");
359 -- Raise program error with file:line + msg information
360
361 procedure Raise_Storage_Error
362 (File : System.Address;
363 Line : Integer);
364 pragma No_Return (Raise_Storage_Error);
365 pragma Export
366 (C, Raise_Storage_Error, "__gnat_raise_storage_error");
367 -- Raise storage error with file:line information
368
369 procedure Raise_Storage_Error_Msg
370 (File : System.Address;
371 Line : Integer;
372 Msg : System.Address);
373 pragma No_Return (Raise_Storage_Error_Msg);
374 pragma Export
375 (C, Raise_Storage_Error_Msg, "__gnat_raise_storage_error_msg");
376 -- Raise storage error with file:line + reason msg information
377
378 -- The exception raising process and the automatic tracing mechanism rely
379 -- on some careful use of flags attached to the exception occurrence. The
380 -- graph below illustrates the relations between the Raise_ subprograms
381 -- and identifies the points where basic flags such as Exception_Raised
382 -- are initialized.
383 --
384 -- (i) signs indicate the flags initialization points. R stands for Raise,
385 -- W for With, and E for Exception.
386 --
387 -- R_No_Msg R_E R_Pe R_Ce R_Se
388 -- | | | | |
389 -- +--+ +--+ +---+ | +---+
390 -- | | | | |
391 -- R_E_No_Defer(i) R_W_Msg(i) R_W_Loc
392 -- | | | |
393 -- +------------+ | +-----------+ +--+
394 -- | | | |
395 -- | | | Set_E_C_Msg(i)
396 -- | | |
397 -- Raise_Current_Excep
398
399 procedure Reraise;
400 pragma No_Return (Reraise);
401 pragma Export (C, Reraise, "__gnat_reraise");
402 -- Reraises the exception referenced by the Current_Excep field of
403 -- the TSD (all fields of this exception occurrence are set). Abort
404 -- is deferred before the reraise operation.
405
406 -- Save_Occurrence variations: As the management of the private data
407 -- attached to occurrences is delicate, wether or not pointers to such
408 -- data has to be copied in various situations is better made explicit.
409 -- The following procedures provide an internal interface to help making
410 -- this explicit.
411
412 procedure Save_Occurrence_And_Private
413 (Target : out Exception_Occurrence;
414 Source : Exception_Occurrence);
415 -- Copy all the components of Source to Target as well as the
416 -- Private_Data pointer.
417
418 procedure Save_Occurrence_No_Private
419 (Target : out Exception_Occurrence;
420 Source : Exception_Occurrence);
421 -- Copy all the components of Source to Target, except the
422 -- Private_Data pointer.
423
424 procedure Transfer_Occurrence
425 (Target : Exception_Occurrence_Access;
426 Source : Exception_Occurrence);
427 pragma Export (C, Transfer_Occurrence, "__gnat_transfer_occurrence");
428 -- Called from System.Tasking.RendezVous.Exceptional_Complete_RendezVous
429 -- to setup Target from Source as an exception to be propagated in the
430 -- caller task. Target is expected to be a pointer to the fixed TSD
431 -- occurrence for this task.
432
433 -----------------------------
434 -- Run-Time Check Routines --
435 -----------------------------
436
437 -- These routines are called from the runtime to raise a specific
438 -- exception with a reason message attached. The parameters are
439 -- the file name and line number in each case. The names are keyed
440 -- to the codes defined in Types.ads and a-types.h (for example,
441 -- the name Rcheck_05 refers to the Reason whose Pos code is 5).
442
443 procedure Rcheck_00 (File : System.Address; Line : Integer);
444 procedure Rcheck_01 (File : System.Address; Line : Integer);
445 procedure Rcheck_02 (File : System.Address; Line : Integer);
446 procedure Rcheck_03 (File : System.Address; Line : Integer);
447 procedure Rcheck_04 (File : System.Address; Line : Integer);
448 procedure Rcheck_05 (File : System.Address; Line : Integer);
449 procedure Rcheck_06 (File : System.Address; Line : Integer);
450 procedure Rcheck_07 (File : System.Address; Line : Integer);
451 procedure Rcheck_08 (File : System.Address; Line : Integer);
452 procedure Rcheck_09 (File : System.Address; Line : Integer);
453 procedure Rcheck_10 (File : System.Address; Line : Integer);
454 procedure Rcheck_11 (File : System.Address; Line : Integer);
455 procedure Rcheck_12 (File : System.Address; Line : Integer);
456 procedure Rcheck_13 (File : System.Address; Line : Integer);
457 procedure Rcheck_14 (File : System.Address; Line : Integer);
458 procedure Rcheck_15 (File : System.Address; Line : Integer);
459 procedure Rcheck_16 (File : System.Address; Line : Integer);
460 procedure Rcheck_17 (File : System.Address; Line : Integer);
461 procedure Rcheck_18 (File : System.Address; Line : Integer);
462 procedure Rcheck_19 (File : System.Address; Line : Integer);
463 procedure Rcheck_20 (File : System.Address; Line : Integer);
464 procedure Rcheck_21 (File : System.Address; Line : Integer);
465 procedure Rcheck_22 (File : System.Address; Line : Integer);
466 procedure Rcheck_23 (File : System.Address; Line : Integer);
467 procedure Rcheck_24 (File : System.Address; Line : Integer);
468 procedure Rcheck_25 (File : System.Address; Line : Integer);
469 procedure Rcheck_26 (File : System.Address; Line : Integer);
470 procedure Rcheck_27 (File : System.Address; Line : Integer);
471 procedure Rcheck_28 (File : System.Address; Line : Integer);
472 procedure Rcheck_29 (File : System.Address; Line : Integer);
473 procedure Rcheck_30 (File : System.Address; Line : Integer);
474
475 pragma Export (C, Rcheck_00, "__gnat_rcheck_00");
476 pragma Export (C, Rcheck_01, "__gnat_rcheck_01");
477 pragma Export (C, Rcheck_02, "__gnat_rcheck_02");
478 pragma Export (C, Rcheck_03, "__gnat_rcheck_03");
479 pragma Export (C, Rcheck_04, "__gnat_rcheck_04");
480 pragma Export (C, Rcheck_05, "__gnat_rcheck_05");
481 pragma Export (C, Rcheck_06, "__gnat_rcheck_06");
482 pragma Export (C, Rcheck_07, "__gnat_rcheck_07");
483 pragma Export (C, Rcheck_08, "__gnat_rcheck_08");
484 pragma Export (C, Rcheck_09, "__gnat_rcheck_09");
485 pragma Export (C, Rcheck_10, "__gnat_rcheck_10");
486 pragma Export (C, Rcheck_11, "__gnat_rcheck_11");
487 pragma Export (C, Rcheck_12, "__gnat_rcheck_12");
488 pragma Export (C, Rcheck_13, "__gnat_rcheck_13");
489 pragma Export (C, Rcheck_14, "__gnat_rcheck_14");
490 pragma Export (C, Rcheck_15, "__gnat_rcheck_15");
491 pragma Export (C, Rcheck_16, "__gnat_rcheck_16");
492 pragma Export (C, Rcheck_17, "__gnat_rcheck_17");
493 pragma Export (C, Rcheck_18, "__gnat_rcheck_18");
494 pragma Export (C, Rcheck_19, "__gnat_rcheck_19");
495 pragma Export (C, Rcheck_20, "__gnat_rcheck_20");
496 pragma Export (C, Rcheck_21, "__gnat_rcheck_21");
497 pragma Export (C, Rcheck_22, "__gnat_rcheck_22");
498 pragma Export (C, Rcheck_23, "__gnat_rcheck_23");
499 pragma Export (C, Rcheck_24, "__gnat_rcheck_24");
500 pragma Export (C, Rcheck_25, "__gnat_rcheck_25");
501 pragma Export (C, Rcheck_26, "__gnat_rcheck_26");
502 pragma Export (C, Rcheck_27, "__gnat_rcheck_27");
503 pragma Export (C, Rcheck_28, "__gnat_rcheck_28");
504 pragma Export (C, Rcheck_29, "__gnat_rcheck_29");
505 pragma Export (C, Rcheck_30, "__gnat_rcheck_30");
506
507 -- None of these procedures ever returns (they raise an exception!). By
508 -- using pragma No_Return, we ensure that any junk code after the call,
509 -- such as normal return epilog stuff, can be eliminated).
510
511 pragma No_Return (Rcheck_00);
512 pragma No_Return (Rcheck_01);
513 pragma No_Return (Rcheck_02);
514 pragma No_Return (Rcheck_03);
515 pragma No_Return (Rcheck_04);
516 pragma No_Return (Rcheck_05);
517 pragma No_Return (Rcheck_06);
518 pragma No_Return (Rcheck_07);
519 pragma No_Return (Rcheck_08);
520 pragma No_Return (Rcheck_09);
521 pragma No_Return (Rcheck_10);
522 pragma No_Return (Rcheck_11);
523 pragma No_Return (Rcheck_12);
524 pragma No_Return (Rcheck_13);
525 pragma No_Return (Rcheck_14);
526 pragma No_Return (Rcheck_15);
527 pragma No_Return (Rcheck_16);
528 pragma No_Return (Rcheck_17);
529 pragma No_Return (Rcheck_18);
530 pragma No_Return (Rcheck_19);
531 pragma No_Return (Rcheck_20);
532 pragma No_Return (Rcheck_21);
533 pragma No_Return (Rcheck_22);
534 pragma No_Return (Rcheck_23);
535 pragma No_Return (Rcheck_24);
536 pragma No_Return (Rcheck_25);
537 pragma No_Return (Rcheck_26);
538 pragma No_Return (Rcheck_27);
539 pragma No_Return (Rcheck_28);
540 pragma No_Return (Rcheck_29);
541 pragma No_Return (Rcheck_30);
542
543 ---------------------------------------------
544 -- Reason Strings for Run-Time Check Calls --
545 ---------------------------------------------
546
547 -- These strings are null-terminated and are used by Rcheck_nn. The
548 -- strings correspond to the definitions for Types.RT_Exception_Code.
549
550 use ASCII;
551
552 Rmsg_00 : constant String := "access check failed" & NUL;
553 Rmsg_01 : constant String := "access parameter is null" & NUL;
554 Rmsg_02 : constant String := "discriminant check failed" & NUL;
555 Rmsg_03 : constant String := "divide by zero" & NUL;
556 Rmsg_04 : constant String := "explicit raise" & NUL;
557 Rmsg_05 : constant String := "index check failed" & NUL;
558 Rmsg_06 : constant String := "invalid data" & NUL;
559 Rmsg_07 : constant String := "length check failed" & NUL;
560 Rmsg_08 : constant String := "null-exclusion check failed" & NUL;
561 Rmsg_09 : constant String := "overflow check failed" & NUL;
562 Rmsg_10 : constant String := "partition check failed" & NUL;
563 Rmsg_11 : constant String := "range check failed" & NUL;
564 Rmsg_12 : constant String := "tag check failed" & NUL;
565 Rmsg_13 : constant String := "access before elaboration" & NUL;
566 Rmsg_14 : constant String := "accessibility check failed" & NUL;
567 Rmsg_15 : constant String := "all guards closed" & NUL;
568 Rmsg_16 : constant String := "duplicated entry address" & NUL;
569 Rmsg_17 : constant String := "explicit raise" & NUL;
570 Rmsg_18 : constant String := "finalize/adjust raised exception" & NUL;
571 Rmsg_19 : constant String := "misaligned address value" & NUL;
572 Rmsg_20 : constant String := "missing return" & NUL;
573 Rmsg_21 : constant String := "overlaid controlled object" & NUL;
574 Rmsg_22 : constant String := "potentially blocking operation" & NUL;
575 Rmsg_23 : constant String := "stubbed subprogram called" & NUL;
576 Rmsg_24 : constant String := "unchecked union restriction" & NUL;
577 Rmsg_25 : constant String := "illegal use of"
578 & " remote access-to-class-wide type, see RM E.4(18)" & NUL;
579 Rmsg_26 : constant String := "empty storage pool" & NUL;
580 Rmsg_27 : constant String := "explicit raise" & NUL;
581 Rmsg_28 : constant String := "infinite recursion" & NUL;
582 Rmsg_29 : constant String := "object too large" & NUL;
583 Rmsg_30 : constant String := "restriction violation" & NUL;
584
585 -----------------------
586 -- Polling Interface --
587 -----------------------
588
589 type Unsigned is mod 2 ** 32;
590
591 Counter : Unsigned := 0;
592 pragma Warnings (Off, Counter);
593 -- This counter is provided for convenience. It can be used in Poll to
594 -- perform periodic but not systematic operations.
595
596 procedure Poll is separate;
597 -- The actual polling routine is separate, so that it can easily
598 -- be replaced with a target dependent version.
599
600 --------------------------
601 -- Code_Address_For_AAA --
602 --------------------------
603
604 -- This function gives us the start of the PC range for addresses
605 -- within the exception unit itself. We hope that gigi/gcc keep all the
606 -- procedures in their original order!
607
608 function Code_Address_For_AAA return System.Address is
609 begin
610 -- We are using a label instead of merely using
611 -- Code_Address_For_AAA'Address because on some platforms the latter
612 -- does not yield the address we want, but the address of a stub or of
613 -- a descriptor instead. This is the case at least on Alpha-VMS and
614 -- PA-HPUX.
615
616 <<Start_Of_AAA>>
617 return Start_Of_AAA'Address;
618 end Code_Address_For_AAA;
619
620 ----------------
621 -- Call_Chain --
622 ----------------
623
624 procedure Call_Chain (Excep : EOA) is separate;
625 -- The actual Call_Chain routine is separate, so that it can easily
626 -- be dummied out when no exception traceback information is needed.
627
628 ------------------------------
629 -- Current_Target_Exception --
630 ------------------------------
631
632 function Current_Target_Exception return Exception_Occurrence is
633 begin
634 return Null_Occurrence;
635 end Current_Target_Exception;
636
637 -------------------
638 -- EId_To_String --
639 -------------------
640
641 function EId_To_String (X : Exception_Id) return String
642 renames Stream_Attributes.EId_To_String;
643
644 ------------------
645 -- EO_To_String --
646 ------------------
647
648 -- We use the null string to represent the null occurrence, otherwise
649 -- we output the Exception_Information string for the occurrence.
650
651 function EO_To_String (X : Exception_Occurrence) return String
652 renames Stream_Attributes.EO_To_String;
653
654 ------------------------
655 -- Exception_Identity --
656 ------------------------
657
658 function Exception_Identity
659 (X : Exception_Occurrence) return Exception_Id
660 is
661 begin
662 -- Note that the following test used to be here for the original
663 -- Ada 95 semantics, but these were modified by AI-241 to require
664 -- returning Null_Id instead of raising Constraint_Error.
665
666 -- if X.Id = Null_Id then
667 -- raise Constraint_Error;
668 -- end if;
669
670 return X.Id;
671 end Exception_Identity;
672
673 ---------------------------
674 -- Exception_Information --
675 ---------------------------
676
677 function Exception_Information (X : Exception_Occurrence) return String is
678 begin
679 if X.Id = Null_Id then
680 raise Constraint_Error;
681 end if;
682
683 return Exception_Data.Exception_Information (X);
684 end Exception_Information;
685
686 -----------------------
687 -- Exception_Message --
688 -----------------------
689
690 function Exception_Message (X : Exception_Occurrence) return String is
691 begin
692 if X.Id = Null_Id then
693 raise Constraint_Error;
694 end if;
695
696 return X.Msg (1 .. X.Msg_Length);
697 end Exception_Message;
698
699 --------------------
700 -- Exception_Name --
701 --------------------
702
703 function Exception_Name (Id : Exception_Id) return String is
704 begin
705 if Id = null then
706 raise Constraint_Error;
707 end if;
708
709 return To_Ptr (Id.Full_Name) (1 .. Id.Name_Length - 1);
710 end Exception_Name;
711
712 function Exception_Name (X : Exception_Occurrence) return String is
713 begin
714 return Exception_Name (X.Id);
715 end Exception_Name;
716
717 ---------------------------
718 -- Exception_Name_Simple --
719 ---------------------------
720
721 function Exception_Name_Simple (X : Exception_Occurrence) return String is
722 Name : constant String := Exception_Name (X);
723 P : Natural;
724
725 begin
726 P := Name'Length;
727 while P > 1 loop
728 exit when Name (P - 1) = '.';
729 P := P - 1;
730 end loop;
731
732 -- Return result making sure lower bound is 1
733
734 declare
735 subtype Rname is String (1 .. Name'Length - P + 1);
736 begin
737 return Rname (Name (P .. Name'Length));
738 end;
739 end Exception_Name_Simple;
740
741 --------------------
742 -- Exception_Data --
743 --------------------
744
745 package body Exception_Data is separate;
746 -- This package can be easily dummied out if we do not want the
747 -- basic support for exception messages (such as in Ada 83).
748
749 ---------------------------
750 -- Exception_Propagation --
751 ---------------------------
752
753 package body Exception_Propagation is separate;
754 -- Depending on the actual exception mechanism used (front-end or
755 -- back-end based), the implementation will differ, which is why this
756 -- package is separated.
757
758 ----------------------
759 -- Exception_Traces --
760 ----------------------
761
762 package body Exception_Traces is separate;
763 -- Depending on the underlying support for IO the implementation
764 -- will differ. Moreover we would like to dummy out this package
765 -- in case we do not want any exception tracing support. This is
766 -- why this package is separated.
767
768 -----------------------
769 -- Stream Attributes --
770 -----------------------
771
772 package body Stream_Attributes is separate;
773 -- This package can be easily dummied out if we do not want the
774 -- support for streaming Exception_Ids and Exception_Occurrences.
775
776 -----------------------------
777 -- Process_Raise_Exception --
778 -----------------------------
779
780 procedure Process_Raise_Exception
781 (E : Exception_Id;
782 From_Signal_Handler : Boolean)
783 is
784 pragma Inspection_Point (E);
785 -- This is so the debugger can reliably inspect the parameter
786
787 Jumpbuf_Ptr : constant Address := Get_Jmpbuf_Address.all;
788 Excep : constant EOA := Get_Current_Excep.all;
789
790 begin
791 -- WARNING : There should be no exception handler for this body
792 -- because this would cause gigi to prepend a setup for a new
793 -- jmpbuf to the sequence of statements. We would then always get
794 -- this new buf in Jumpbuf_Ptr instead of the one for the exception
795 -- we are handling, which would completely break the whole design
796 -- of this procedure.
797
798 -- Processing varies between zero cost and setjmp/lonjmp processing
799
800 if Zero_Cost_Exceptions /= 0 then
801
802 -- Use the GCC back-end to propagate the exception. Backtrace
803 -- computation is performed, if required, by the underlying routine.
804 -- Notifications for the debugger are also not performed here,
805 -- because we do not yet know if the exception is handled.
806
807 Exception_Propagation.Propagate_Exception (From_Signal_Handler);
808
809 else
810 -- Compute the backtrace for this occurrence if corresponding binder
811 -- option has been set. Call_Chain takes care of the reraise case.
812
813 Call_Chain (Excep);
814
815 -- Note on above call to Call_Chain:
816
817 -- We used to only do this if From_Signal_Handler was not set,
818 -- based on the assumption that backtracing from a signal handler
819 -- would not work due to stack layout oddities. However, since
820
821 -- 1. The flag is never set in tasking programs (Notify_Exception
822 -- performs regular raise statements), and
823
824 -- 2. No problem has shown up in tasking programs around here so
825 -- far, this turned out to be too strong an assumption.
826
827 -- As, in addition, the test was
828
829 -- 1. preventing the production of backtraces in non-tasking
830 -- programs, and
831
832 -- 2. introducing a behavior inconsistency between
833 -- the tasking and non-tasking cases,
834
835 -- we have simply removed it
836
837 -- If the jump buffer pointer is non-null, transfer control using
838 -- it. Otherwise announce an unhandled exception (note that this
839 -- means that we have no finalizations to do other than at the outer
840 -- level). Perform the necessary notification tasks in both cases.
841
842 if Jumpbuf_Ptr /= Null_Address then
843
844 if not Excep.Exception_Raised then
845 Excep.Exception_Raised := True;
846 Exception_Traces.Notify_Handled_Exception;
847 end if;
848
849 builtin_longjmp (Jumpbuf_Ptr, 1);
850
851 else
852 -- The pragma Inspection point here ensures that the debugger
853 -- can inspect the parameter.
854
855 pragma Inspection_Point (E);
856
857 Exception_Traces.Notify_Unhandled_Exception;
858 Exception_Traces.Unhandled_Exception_Terminate;
859 end if;
860 end if;
861 end Process_Raise_Exception;
862
863 ----------------------------
864 -- Raise_Constraint_Error --
865 ----------------------------
866
867 procedure Raise_Constraint_Error
868 (File : System.Address;
869 Line : Integer)
870 is
871 begin
872 Raise_With_Location_And_Msg
873 (Constraint_Error_Def'Access, File, Line);
874 end Raise_Constraint_Error;
875
876 --------------------------------
877 -- Raise_Constraint_Error_Msg --
878 --------------------------------
879
880 procedure Raise_Constraint_Error_Msg
881 (File : System.Address;
882 Line : Integer;
883 Msg : System.Address)
884 is
885 begin
886 Raise_With_Location_And_Msg
887 (Constraint_Error_Def'Access, File, Line, Msg);
888 end Raise_Constraint_Error_Msg;
889
890 -------------------------
891 -- Raise_Current_Excep --
892 -------------------------
893
894 procedure Raise_Current_Excep (E : Exception_Id) is
895 pragma Inspection_Point (E);
896 -- This is so the debugger can reliably inspect the parameter
897 begin
898 Process_Raise_Exception (E => E, From_Signal_Handler => False);
899 end Raise_Current_Excep;
900
901 ---------------------
902 -- Raise_Exception --
903 ---------------------
904
905 procedure Raise_Exception
906 (E : Exception_Id;
907 Message : String := "")
908 is
909 begin
910 if E /= null then
911 Exception_Data.Set_Exception_Msg (E, Message);
912 Abort_Defer.all;
913 Raise_Current_Excep (E);
914 end if;
915 end Raise_Exception;
916
917 ----------------------------
918 -- Raise_Exception_Always --
919 ----------------------------
920
921 procedure Raise_Exception_Always
922 (E : Exception_Id;
923 Message : String := "")
924 is
925 begin
926 Exception_Data.Set_Exception_Msg (E, Message);
927 Abort_Defer.all;
928 Raise_Current_Excep (E);
929 end Raise_Exception_Always;
930
931 -------------------------------
932 -- Raise_From_Signal_Handler --
933 -------------------------------
934
935 procedure Raise_From_Signal_Handler
936 (E : Exception_Id;
937 M : System.Address)
938 is
939 begin
940 Exception_Data.Set_Exception_C_Msg (E, M);
941 Abort_Defer.all;
942 Process_Raise_Exception (E => E, From_Signal_Handler => True);
943 end Raise_From_Signal_Handler;
944
945 -------------------------
946 -- Raise_Program_Error --
947 -------------------------
948
949 procedure Raise_Program_Error
950 (File : System.Address;
951 Line : Integer)
952 is
953 begin
954 Raise_With_Location_And_Msg
955 (Program_Error_Def'Access, File, Line);
956 end Raise_Program_Error;
957
958 -----------------------------
959 -- Raise_Program_Error_Msg --
960 -----------------------------
961
962 procedure Raise_Program_Error_Msg
963 (File : System.Address;
964 Line : Integer;
965 Msg : System.Address)
966 is
967 begin
968 Raise_With_Location_And_Msg
969 (Program_Error_Def'Access, File, Line, Msg);
970 end Raise_Program_Error_Msg;
971
972 -------------------------
973 -- Raise_Storage_Error --
974 -------------------------
975
976 procedure Raise_Storage_Error
977 (File : System.Address;
978 Line : Integer)
979 is
980 begin
981 Raise_With_Location_And_Msg
982 (Storage_Error_Def'Access, File, Line);
983 end Raise_Storage_Error;
984
985 -----------------------------
986 -- Raise_Storage_Error_Msg --
987 -----------------------------
988
989 procedure Raise_Storage_Error_Msg
990 (File : System.Address;
991 Line : Integer;
992 Msg : System.Address)
993 is
994 begin
995 Raise_With_Location_And_Msg
996 (Storage_Error_Def'Access, File, Line, Msg);
997 end Raise_Storage_Error_Msg;
998
999 ---------------------------------
1000 -- Raise_With_Location_And_Msg --
1001 ---------------------------------
1002
1003 procedure Raise_With_Location_And_Msg
1004 (E : Exception_Id;
1005 F : System.Address;
1006 L : Integer;
1007 M : System.Address := System.Null_Address)
1008 is
1009 begin
1010 Exception_Data.Set_Exception_C_Msg (E, F, L, M);
1011 Abort_Defer.all;
1012 Raise_Current_Excep (E);
1013 end Raise_With_Location_And_Msg;
1014
1015 --------------------
1016 -- Raise_With_Msg --
1017 --------------------
1018
1019 procedure Raise_With_Msg (E : Exception_Id) is
1020 Excep : constant EOA := Get_Current_Excep.all;
1021
1022 begin
1023 Exception_Propagation.Setup_Exception (Excep, Excep);
1024
1025 Excep.Exception_Raised := False;
1026 Excep.Id := E;
1027 Excep.Num_Tracebacks := 0;
1028 Excep.Cleanup_Flag := False;
1029 Excep.Pid := Local_Partition_ID;
1030 Abort_Defer.all;
1031 Raise_Current_Excep (E);
1032 end Raise_With_Msg;
1033
1034 --------------------------------------
1035 -- Calls to Run-Time Check Routines --
1036 --------------------------------------
1037
1038 procedure Rcheck_00 (File : System.Address; Line : Integer) is
1039 begin
1040 Raise_Constraint_Error_Msg (File, Line, Rmsg_00'Address);
1041 end Rcheck_00;
1042
1043 procedure Rcheck_01 (File : System.Address; Line : Integer) is
1044 begin
1045 Raise_Constraint_Error_Msg (File, Line, Rmsg_01'Address);
1046 end Rcheck_01;
1047
1048 procedure Rcheck_02 (File : System.Address; Line : Integer) is
1049 begin
1050 Raise_Constraint_Error_Msg (File, Line, Rmsg_02'Address);
1051 end Rcheck_02;
1052
1053 procedure Rcheck_03 (File : System.Address; Line : Integer) is
1054 begin
1055 Raise_Constraint_Error_Msg (File, Line, Rmsg_03'Address);
1056 end Rcheck_03;
1057
1058 procedure Rcheck_04 (File : System.Address; Line : Integer) is
1059 begin
1060 Raise_Constraint_Error_Msg (File, Line, Rmsg_04'Address);
1061 end Rcheck_04;
1062
1063 procedure Rcheck_05 (File : System.Address; Line : Integer) is
1064 begin
1065 Raise_Constraint_Error_Msg (File, Line, Rmsg_05'Address);
1066 end Rcheck_05;
1067
1068 procedure Rcheck_06 (File : System.Address; Line : Integer) is
1069 begin
1070 Raise_Constraint_Error_Msg (File, Line, Rmsg_06'Address);
1071 end Rcheck_06;
1072
1073 procedure Rcheck_07 (File : System.Address; Line : Integer) is
1074 begin
1075 Raise_Constraint_Error_Msg (File, Line, Rmsg_07'Address);
1076 end Rcheck_07;
1077
1078 procedure Rcheck_08 (File : System.Address; Line : Integer) is
1079 begin
1080 Raise_Constraint_Error_Msg (File, Line, Rmsg_08'Address);
1081 end Rcheck_08;
1082
1083 procedure Rcheck_09 (File : System.Address; Line : Integer) is
1084 begin
1085 Raise_Constraint_Error_Msg (File, Line, Rmsg_09'Address);
1086 end Rcheck_09;
1087
1088 procedure Rcheck_10 (File : System.Address; Line : Integer) is
1089 begin
1090 Raise_Constraint_Error_Msg (File, Line, Rmsg_10'Address);
1091 end Rcheck_10;
1092
1093 procedure Rcheck_11 (File : System.Address; Line : Integer) is
1094 begin
1095 Raise_Constraint_Error_Msg (File, Line, Rmsg_11'Address);
1096 end Rcheck_11;
1097
1098 procedure Rcheck_12 (File : System.Address; Line : Integer) is
1099 begin
1100 Raise_Constraint_Error_Msg (File, Line, Rmsg_12'Address);
1101 end Rcheck_12;
1102
1103 procedure Rcheck_13 (File : System.Address; Line : Integer) is
1104 begin
1105 Raise_Program_Error_Msg (File, Line, Rmsg_13'Address);
1106 end Rcheck_13;
1107
1108 procedure Rcheck_14 (File : System.Address; Line : Integer) is
1109 begin
1110 Raise_Program_Error_Msg (File, Line, Rmsg_14'Address);
1111 end Rcheck_14;
1112
1113 procedure Rcheck_15 (File : System.Address; Line : Integer) is
1114 begin
1115 Raise_Program_Error_Msg (File, Line, Rmsg_15'Address);
1116 end Rcheck_15;
1117
1118 procedure Rcheck_16 (File : System.Address; Line : Integer) is
1119 begin
1120 Raise_Program_Error_Msg (File, Line, Rmsg_16'Address);
1121 end Rcheck_16;
1122
1123 procedure Rcheck_17 (File : System.Address; Line : Integer) is
1124 begin
1125 Raise_Program_Error_Msg (File, Line, Rmsg_17'Address);
1126 end Rcheck_17;
1127
1128 procedure Rcheck_18 (File : System.Address; Line : Integer) is
1129 begin
1130 Raise_Program_Error_Msg (File, Line, Rmsg_18'Address);
1131 end Rcheck_18;
1132
1133 procedure Rcheck_19 (File : System.Address; Line : Integer) is
1134 begin
1135 Raise_Program_Error_Msg (File, Line, Rmsg_19'Address);
1136 end Rcheck_19;
1137
1138 procedure Rcheck_20 (File : System.Address; Line : Integer) is
1139 begin
1140 Raise_Program_Error_Msg (File, Line, Rmsg_20'Address);
1141 end Rcheck_20;
1142
1143 procedure Rcheck_21 (File : System.Address; Line : Integer) is
1144 begin
1145 Raise_Program_Error_Msg (File, Line, Rmsg_21'Address);
1146 end Rcheck_21;
1147
1148 procedure Rcheck_22 (File : System.Address; Line : Integer) is
1149 begin
1150 Raise_Program_Error_Msg (File, Line, Rmsg_22'Address);
1151 end Rcheck_22;
1152
1153 procedure Rcheck_23 (File : System.Address; Line : Integer) is
1154 begin
1155 Raise_Program_Error_Msg (File, Line, Rmsg_23'Address);
1156 end Rcheck_23;
1157
1158 procedure Rcheck_24 (File : System.Address; Line : Integer) is
1159 begin
1160 Raise_Program_Error_Msg (File, Line, Rmsg_24'Address);
1161 end Rcheck_24;
1162
1163 procedure Rcheck_25 (File : System.Address; Line : Integer) is
1164 begin
1165 Raise_Program_Error_Msg (File, Line, Rmsg_25'Address);
1166 end Rcheck_25;
1167
1168 procedure Rcheck_26 (File : System.Address; Line : Integer) is
1169 begin
1170 Raise_Storage_Error_Msg (File, Line, Rmsg_26'Address);
1171 end Rcheck_26;
1172
1173 procedure Rcheck_27 (File : System.Address; Line : Integer) is
1174 begin
1175 Raise_Storage_Error_Msg (File, Line, Rmsg_27'Address);
1176 end Rcheck_27;
1177
1178 procedure Rcheck_28 (File : System.Address; Line : Integer) is
1179 begin
1180 Raise_Storage_Error_Msg (File, Line, Rmsg_28'Address);
1181 end Rcheck_28;
1182
1183 procedure Rcheck_29 (File : System.Address; Line : Integer) is
1184 begin
1185 Raise_Storage_Error_Msg (File, Line, Rmsg_29'Address);
1186 end Rcheck_29;
1187
1188 procedure Rcheck_30 (File : System.Address; Line : Integer) is
1189 begin
1190 Raise_Storage_Error_Msg (File, Line, Rmsg_30'Address);
1191 end Rcheck_30;
1192
1193 -------------
1194 -- Reraise --
1195 -------------
1196
1197 procedure Reraise is
1198 Excep : constant EOA := Get_Current_Excep.all;
1199
1200 begin
1201 Abort_Defer.all;
1202 Exception_Propagation.Setup_Exception (Excep, Excep, Reraised => True);
1203 Raise_Current_Excep (Excep.Id);
1204 end Reraise;
1205
1206 ------------------------
1207 -- Reraise_Occurrence --
1208 ------------------------
1209
1210 procedure Reraise_Occurrence (X : Exception_Occurrence) is
1211 begin
1212 if X.Id /= null then
1213 Abort_Defer.all;
1214 Exception_Propagation.Setup_Exception
1215 (X'Unrestricted_Access, Get_Current_Excep.all, Reraised => True);
1216 Save_Occurrence_No_Private (Get_Current_Excep.all.all, X);
1217 Raise_Current_Excep (X.Id);
1218 end if;
1219 end Reraise_Occurrence;
1220
1221 -------------------------------
1222 -- Reraise_Occurrence_Always --
1223 -------------------------------
1224
1225 procedure Reraise_Occurrence_Always (X : Exception_Occurrence) is
1226 begin
1227 Abort_Defer.all;
1228 Exception_Propagation.Setup_Exception
1229 (X'Unrestricted_Access, Get_Current_Excep.all, Reraised => True);
1230 Save_Occurrence_No_Private (Get_Current_Excep.all.all, X);
1231 Raise_Current_Excep (X.Id);
1232 end Reraise_Occurrence_Always;
1233
1234 ---------------------------------
1235 -- Reraise_Occurrence_No_Defer --
1236 ---------------------------------
1237
1238 procedure Reraise_Occurrence_No_Defer (X : Exception_Occurrence) is
1239 begin
1240 Exception_Propagation.Setup_Exception
1241 (X'Unrestricted_Access, Get_Current_Excep.all, Reraised => True);
1242 Save_Occurrence_No_Private (Get_Current_Excep.all.all, X);
1243 Raise_Current_Excep (X.Id);
1244 end Reraise_Occurrence_No_Defer;
1245
1246 ---------------------
1247 -- Save_Occurrence --
1248 ---------------------
1249
1250 procedure Save_Occurrence
1251 (Target : out Exception_Occurrence;
1252 Source : Exception_Occurrence)
1253 is
1254 begin
1255 Save_Occurrence_No_Private (Target, Source);
1256 end Save_Occurrence;
1257
1258 function Save_Occurrence (Source : Exception_Occurrence) return EOA is
1259 Target : constant EOA := new Exception_Occurrence;
1260 begin
1261 Save_Occurrence (Target.all, Source);
1262 return Target;
1263 end Save_Occurrence;
1264
1265 --------------------------------
1266 -- Save_Occurrence_And_Private --
1267 --------------------------------
1268
1269 procedure Save_Occurrence_And_Private
1270 (Target : out Exception_Occurrence;
1271 Source : Exception_Occurrence)
1272 is
1273 begin
1274 Save_Occurrence_No_Private (Target, Source);
1275 Target.Private_Data := Source.Private_Data;
1276 end Save_Occurrence_And_Private;
1277
1278 --------------------------------
1279 -- Save_Occurrence_No_Private --
1280 --------------------------------
1281
1282 procedure Save_Occurrence_No_Private
1283 (Target : out Exception_Occurrence;
1284 Source : Exception_Occurrence)
1285 is
1286 begin
1287 Target.Id := Source.Id;
1288 Target.Msg_Length := Source.Msg_Length;
1289 Target.Num_Tracebacks := Source.Num_Tracebacks;
1290 Target.Pid := Source.Pid;
1291 Target.Cleanup_Flag := Source.Cleanup_Flag;
1292
1293 Target.Msg (1 .. Target.Msg_Length) :=
1294 Source.Msg (1 .. Target.Msg_Length);
1295
1296 Target.Tracebacks (1 .. Target.Num_Tracebacks) :=
1297 Source.Tracebacks (1 .. Target.Num_Tracebacks);
1298 end Save_Occurrence_No_Private;
1299
1300 -------------------------
1301 -- Transfer_Occurrence --
1302 -------------------------
1303
1304 procedure Transfer_Occurrence
1305 (Target : Exception_Occurrence_Access;
1306 Source : Exception_Occurrence)
1307 is
1308 begin
1309 -- Setup Target as an exception to be propagated in the calling task
1310 -- (rendezvous-wise), taking care not to clobber the associated private
1311 -- data. Target is expected to be a pointer to the calling task's
1312 -- fixed TSD occurrence, which is very different from Get_Current_Excep
1313 -- here because this subprogram is called from the called task.
1314
1315 Exception_Propagation.Setup_Exception (Target, Target);
1316 Save_Occurrence_No_Private (Target.all, Source);
1317 end Transfer_Occurrence;
1318
1319 -------------------
1320 -- String_To_EId --
1321 -------------------
1322
1323 function String_To_EId (S : String) return Exception_Id
1324 renames Stream_Attributes.String_To_EId;
1325
1326 ------------------
1327 -- String_To_EO --
1328 ------------------
1329
1330 function String_To_EO (S : String) return Exception_Occurrence
1331 renames Stream_Attributes.String_To_EO;
1332
1333 ------------------------------
1334 -- Raise_Exception_No_Defer --
1335 ------------------------------
1336
1337 procedure Raise_Exception_No_Defer
1338 (E : Exception_Id;
1339 Message : String := "")
1340 is
1341 begin
1342 Exception_Data.Set_Exception_Msg (E, Message);
1343
1344 -- Do not call Abort_Defer.all, as specified by the spec
1345
1346 Raise_Current_Excep (E);
1347 end Raise_Exception_No_Defer;
1348
1349 ---------------
1350 -- To_Stderr --
1351 ---------------
1352
1353 procedure To_Stderr (C : Character) is
1354
1355 type int is new Integer;
1356
1357 procedure put_char_stderr (C : int);
1358 pragma Import (C, put_char_stderr, "put_char_stderr");
1359
1360 begin
1361 put_char_stderr (Character'Pos (C));
1362 end To_Stderr;
1363
1364 procedure To_Stderr (S : String) is
1365 begin
1366 for J in S'Range loop
1367 if S (J) /= ASCII.CR then
1368 To_Stderr (S (J));
1369 end if;
1370 end loop;
1371 end To_Stderr;
1372
1373 --------------------------
1374 -- Code_Address_For_ZZZ --
1375 --------------------------
1376
1377 -- This function gives us the end of the PC range for addresses
1378 -- within the exception unit itself. We hope that gigi/gcc keeps all the
1379 -- procedures in their original order!
1380
1381 function Code_Address_For_ZZZ return System.Address is
1382 begin
1383 <<Start_Of_ZZZ>>
1384 return Start_Of_ZZZ'Address;
1385 end Code_Address_For_ZZZ;
1386
1387 end Ada.Exceptions;
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