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Merge from the pain train
[official-gcc.git] / gcc / ada / a-except.adb
blob7470d545039f442994cd4c07b50c52fea5803a65
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, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, 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 pragma Warnings (Off);
39 -- Since several constructs give warnings in 3.14a1, including unreferenced
40 -- variables and pragma Unreferenced itself.
41
42 with System; use System;
43 with System.Standard_Library; use System.Standard_Library;
44 with System.Soft_Links; use System.Soft_Links;
45 with System.Machine_State_Operations; use System.Machine_State_Operations;
46
47 package body Ada.Exceptions is
48
49 procedure builtin_longjmp (buffer : Address; Flag : Integer);
50 pragma No_Return (builtin_longjmp);
51 pragma Import (C, builtin_longjmp, "_gnat_builtin_longjmp");
52
53 pragma Suppress (All_Checks);
54 -- We definitely do not want exceptions occurring within this unit, or
55 -- we are in big trouble. If an exceptional situation does occur, better
56 -- that it not be raised, since raising it can cause confusing chaos.
57
58 Zero_Cost_Exceptions : Integer;
59 pragma Import (C, Zero_Cost_Exceptions, "__gl_zero_cost_exceptions");
60 -- Boolean indicating if we are handling exceptions using a zero cost
61 -- mechanism.
62 --
63 -- Note that although we currently do not support it, the GCC3 back-end
64 -- tables are also potentially useable for setjmp/longjmp processing.
65
66 -----------------------
67 -- Local Subprograms --
68 -----------------------
69
70 -- Note: the exported subprograms in this package body are called directly
71 -- from C clients using the given external name, even though they are not
72 -- technically visible in the Ada sense.
73
74 procedure AAA;
75 procedure ZZZ;
76 -- Mark start and end of procedures in this package
77 --
78 -- The AAA and ZZZ procedures are used to provide exclusion bounds in
79 -- calls to Call_Chain at exception raise points from this unit. The
80 -- purpose is to arrange for the exception tracebacks not to include
81 -- frames from routines involved in the raise process, as these are
82 -- meaningless from the user's standpoint.
83 --
84 -- For these bounds to be meaningful, we need to ensure that the object
85 -- code for the routines involved in processing a raise is located after
86 -- the object code for AAA and before the object code for ZZZ. This will
87 -- indeed be the case as long as the following rules are respected:
88 --
89 -- 1) The bodies of the subprograms involved in processing a raise
90 -- are located after the body of AAA and before the body of ZZZ.
91 --
92 -- 2) No pragma Inline applies to any of these subprograms, as this
93 -- could delay the corresponding assembly output until the end of
94 -- the unit.
95
96 Code_Address_For_AAA, Code_Address_For_ZZZ : System.Address;
97 -- Used to represent addresses really inside the code range for AAA and
98 -- ZZZ, initialized to the address of a label inside the corresponding
99 -- procedure. This is initialization takes place inside the procedures
100 -- themselves, which are called as part of the elaboration code.
101 --
102 -- We are doing this instead of merely using Proc'Address because on some
103 -- platforms the latter does not yield the address we want, but the
104 -- address of a stub or of a descriptor instead. This is the case at least
105 -- on Alpha-VMS and PA-HPUX.
106
107 procedure Call_Chain (Excep : EOA);
108 -- Store up to Max_Tracebacks in Excep, corresponding to the current
109 -- call chain.
110
111 procedure Process_Raise_Exception
112 (E : Exception_Id;
113 From_Signal_Handler : Boolean);
114 pragma No_Return (Process_Raise_Exception);
115 -- This is the lowest level raise routine. It raises the exception
116 -- referenced by Current_Excep.all in the TSD, without deferring abort
117 -- (the caller must ensure that abort is deferred on entry).
118 --
119 -- This is the common implementation for Raise_Current_Excep and
120 -- Raise_From_Signal_Handler. The origin of the call is indicated by the
121 -- From_Signal_Handler argument.
122
123 procedure To_Stderr (S : String);
124 pragma Export (Ada, To_Stderr, "__gnat_to_stderr");
125 -- Little routine to output string to stderr that is also used
126 -- in the tasking run time.
127
128 procedure To_Stderr (C : Character);
129 pragma Inline (To_Stderr);
130 pragma Export (Ada, To_Stderr, "__gnat_to_stderr_char");
131 -- Little routine to output a character to stderr, used by some of
132 -- the separate units below.
133
134 package Exception_Data is
135
136 ---------------------------------
137 -- Exception messages routines --
138 ---------------------------------
139
140 procedure Set_Exception_C_Msg
141 (Id : Exception_Id;
142 Msg1 : Big_String_Ptr;
143 Line : Integer := 0;
144 Msg2 : Big_String_Ptr := null);
145 -- This routine is called to setup the exception referenced by the
146 -- Current_Excep field in the TSD to contain the indicated Id value
147 -- and message. Msg1 is a null terminated string which is generated
148 -- as the exception message. If line is non-zero, then a colon and
149 -- the decimal representation of this integer is appended to the
150 -- message. When Msg2 is non-null, a space and this additional null
151 -- terminated string is added to the message.
152
153 procedure Set_Exception_Msg
154 (Id : Exception_Id;
155 Message : String);
156 -- This routine is called to setup the exception referenced by the
157 -- Current_Excep field in the TSD to contain the indicated Id value
158 -- and message. Message is a string which is generated as the
159 -- exception message.
160
161 --------------------------------------
162 -- Exception information subprogram --
163 --------------------------------------
164
165 function Exception_Information (X : Exception_Occurrence) return String;
166 -- The format of the exception information is as follows:
167 --
168 -- Exception_Name: <exception name> (as in Exception_Name)
169 -- Message: <message> (only if Exception_Message is empty)
170 -- PID=nnnn (only if != 0)
171 -- Call stack traceback locations: (only if at least one location)
172 -- <0xyyyyyyyy 0xyyyyyyyy ...> (is recorded)
173 --
174 -- The lines are separated by a ASCII.LF character.
175 -- The nnnn is the partition Id given as decimal digits.
176 -- The 0x... line represents traceback program counter locations, in
177 -- execution order with the first one being the exception location. It
178 -- is present only
179 --
180 -- The Exception_Name and Message lines are omitted in the abort
181 -- signal case, since this is not really an exception.
182
183 -- !! If the format of the generated string is changed, please note
184 -- !! that an equivalent modification to the routine String_To_EO must
185 -- !! be made to preserve proper functioning of the stream attributes.
186
187 ---------------------------------------
188 -- Exception backtracing subprograms --
189 ---------------------------------------
190
191 -- What is automatically output when exception tracing is on is the
192 -- usual exception information with the call chain backtrace possibly
193 -- tailored by a backtrace decorator. Modifying Exception_Information
194 -- itself is not a good idea because the decorated output is completely
195 -- out of control and would break all our code related to the streaming
196 -- of exceptions. We then provide an alternative function to compute
197 -- the possibly tailored output, which is equivalent if no decorator is
198 -- currently set:
199
200 function Tailored_Exception_Information
201 (X : Exception_Occurrence) return String;
202 -- Exception information to be output in the case of automatic tracing
203 -- requested through GNAT.Exception_Traces.
204 --
205 -- This is the same as Exception_Information if no backtrace decorator
206 -- is currently in place. Otherwise, this is Exception_Information with
207 -- the call chain raw addresses replaced by the result of a call to the
208 -- current decorator provided with the call chain addresses.
209
210 pragma Export
211 (Ada, Tailored_Exception_Information,
212 "__gnat_tailored_exception_information");
213 -- This is currently used by System.Tasking.Stages.
214
215 end Exception_Data;
216
217 package Exception_Traces is
218
219 use Exception_Data;
220 -- Imports Tailored_Exception_Information
221
222 ----------------------------------------------
223 -- Run-Time Exception Notification Routines --
224 ----------------------------------------------
225
226 -- These subprograms provide a common run-time interface to trigger the
227 -- actions required when an exception is about to be propagated (e.g.
228 -- user specified actions or output of exception information). They are
229 -- exported to be usable by the Ada exception handling personality
230 -- routine when the GCC 3 mechanism is used.
231
232 procedure Notify_Handled_Exception;
233 pragma Export
234 (C, Notify_Handled_Exception, "__gnat_notify_handled_exception");
235 -- This routine is called for a handled occurrence is about to be
236 -- propagated.
237
238 procedure Notify_Unhandled_Exception;
239 pragma Export
240 (C, Notify_Unhandled_Exception, "__gnat_notify_unhandled_exception");
241 -- This routine is called when an unhandled occurrence is about to be
242 -- propagated.
243
244 procedure Unhandled_Exception_Terminate;
245 pragma No_Return (Unhandled_Exception_Terminate);
246 -- This procedure is called to terminate execution following an
247 -- unhandled exception. The exception information, including
248 -- traceback if available is output, and execution is then
249 -- terminated. Note that at the point where this routine is
250 -- called, the stack has typically been destroyed.
251
252 end Exception_Traces;
253
254 package Exception_Propagation is
255
256 use Exception_Traces;
257 -- Imports Notify_Unhandled_Exception and
258 -- Unhandled_Exception_Terminate
259
260 ------------------------------------
261 -- Exception propagation routines --
262 ------------------------------------
263
264 procedure Setup_Exception
265 (Excep : EOA;
266 Current : EOA;
267 Reraised : Boolean := False);
268 -- Perform the necessary operations to prepare the propagation of Excep
269 -- in a task where Current is the current occurrence. Excep is assumed
270 -- to be a valid (non null) pointer.
271 --
272 -- This should be called before any (re-)setting of the current
273 -- occurrence. Any such (re-)setting shall take care *not* to clobber
274 -- the Private_Data component.
275 --
276 -- Having Current provided as an argument (instead of retrieving it via
277 -- Get_Current_Excep internally) is required to allow one task to setup
278 -- an exception for another task, which is used by Transfer_Occurrence.
279
280 procedure Propagate_Exception (From_Signal_Handler : Boolean);
281 pragma No_Return (Propagate_Exception);
282 -- This procedure propagates the exception represented by the occurrence
283 -- referenced by Current_Excep in the TSD for the current task.
284
285 end Exception_Propagation;
286
287 package Stream_Attributes is
288
289 --------------------------------
290 -- Stream attributes routines --
291 --------------------------------
292
293 function EId_To_String (X : Exception_Id) return String;
294 function String_To_EId (S : String) return Exception_Id;
295 -- Functions for implementing Exception_Id stream attributes
296
297 function EO_To_String (X : Exception_Occurrence) return String;
298 function String_To_EO (S : String) return Exception_Occurrence;
299 -- Functions for implementing Exception_Occurrence stream
300 -- attributes
301
302 end Stream_Attributes;
303
304 procedure Raise_Current_Excep (E : Exception_Id);
305 pragma No_Return (Raise_Current_Excep);
306 pragma Export (C, Raise_Current_Excep, "__gnat_raise_nodefer_with_msg");
307 -- This is a simple wrapper to Process_Raise_Exception setting the
308 -- From_Signal_Handler argument to False.
309 --
310 -- This external name for Raise_Current_Excep is historical, and probably
311 -- should be changed but for now we keep it, because gdb and gigi know
312 -- about it.
313
314 procedure Raise_Exception_No_Defer
315 (E : Exception_Id; Message : String := "");
316 pragma Export
317 (Ada, Raise_Exception_No_Defer,
318 "ada__exceptions__raise_exception_no_defer");
319 pragma No_Return (Raise_Exception_No_Defer);
320 -- Similar to Raise_Exception, but with no abort deferral
321
322 procedure Raise_With_Msg (E : Exception_Id);
323 pragma No_Return (Raise_With_Msg);
324 pragma Export (C, Raise_With_Msg, "__gnat_raise_with_msg");
325 -- Raises an exception with given exception id value. A message
326 -- is associated with the raise, and has already been stored in the
327 -- exception occurrence referenced by the Current_Excep in the TSD.
328 -- Abort is deferred before the raise call.
329
330 procedure Raise_With_Location_And_Msg
331 (E : Exception_Id;
332 F : Big_String_Ptr;
333 L : Integer;
334 M : Big_String_Ptr := null);
335 pragma No_Return (Raise_With_Location_And_Msg);
336 -- Raise an exception with given exception id value. A filename and line
337 -- number is associated with the raise and is stored in the exception
338 -- occurrence and in addition a string message M is appended to
339 -- this (if M is not null).
340
341 procedure Raise_Constraint_Error
342 (File : Big_String_Ptr;
343 Line : Integer);
344 pragma No_Return (Raise_Constraint_Error);
345 pragma Export
346 (C, Raise_Constraint_Error, "__gnat_raise_constraint_error");
347 -- Raise constraint error with file:line information
348
349 procedure Raise_Constraint_Error_Msg
350 (File : Big_String_Ptr;
351 Line : Integer;
352 Msg : Big_String_Ptr);
353 pragma No_Return (Raise_Constraint_Error_Msg);
354 pragma Export
355 (C, Raise_Constraint_Error_Msg, "__gnat_raise_constraint_error_msg");
356 -- Raise constraint error with file:line + msg information
357
358 procedure Raise_Program_Error
359 (File : Big_String_Ptr;
360 Line : Integer);
361 pragma No_Return (Raise_Program_Error);
362 pragma Export
363 (C, Raise_Program_Error, "__gnat_raise_program_error");
364 -- Raise program error with file:line information
365
366 procedure Raise_Program_Error_Msg
367 (File : Big_String_Ptr;
368 Line : Integer;
369 Msg : Big_String_Ptr);
370 pragma No_Return (Raise_Program_Error_Msg);
371 pragma Export
372 (C, Raise_Program_Error_Msg, "__gnat_raise_program_error_msg");
373 -- Raise program error with file:line + msg information
374
375 procedure Raise_Storage_Error
376 (File : Big_String_Ptr;
377 Line : Integer);
378 pragma No_Return (Raise_Storage_Error);
379 pragma Export
380 (C, Raise_Storage_Error, "__gnat_raise_storage_error");
381 -- Raise storage error with file:line information
382
383 procedure Raise_Storage_Error_Msg
384 (File : Big_String_Ptr;
385 Line : Integer;
386 Msg : Big_String_Ptr);
387 pragma No_Return (Raise_Storage_Error_Msg);
388 pragma Export
389 (C, Raise_Storage_Error_Msg, "__gnat_raise_storage_error_msg");
390 -- Raise storage error with file:line + reason msg information
391
392 -- The exception raising process and the automatic tracing mechanism rely
393 -- on some careful use of flags attached to the exception occurrence. The
394 -- graph below illustrates the relations between the Raise_ subprograms
395 -- and identifies the points where basic flags such as Exception_Raised
396 -- are initialized.
397 --
398 -- (i) signs indicate the flags initialization points. R stands for Raise,
399 -- W for With, and E for Exception.
400 --
401 -- R_No_Msg R_E R_Pe R_Ce R_Se
402 -- | | | | |
403 -- +--+ +--+ +---+ | +---+
404 -- | | | | |
405 -- R_E_No_Defer(i) R_W_Msg(i) R_W_Loc
406 -- | | | |
407 -- +------------+ | +-----------+ +--+
408 -- | | | |
409 -- | | | Set_E_C_Msg(i)
410 -- | | |
411 -- Raise_Current_Excep
412
413 procedure Reraise;
414 pragma No_Return (Reraise);
415 pragma Export (C, Reraise, "__gnat_reraise");
416 -- Reraises the exception referenced by the Current_Excep field of
417 -- the TSD (all fields of this exception occurrence are set). Abort
418 -- is deferred before the reraise operation.
419
420 -- Save_Occurrence variations: As the management of the private data
421 -- attached to occurrences is delicate, wether or not pointers to such
422 -- data has to be copied in various situations is better made explicit.
423 -- The following procedures provide an internal interface to help making
424 -- this explicit.
425
426 procedure Save_Occurrence_And_Private
427 (Target : out Exception_Occurrence;
428 Source : Exception_Occurrence);
429 -- Copy all the components of Source to Target as well as the
430 -- Private_Data pointer.
431
432 procedure Save_Occurrence_No_Private
433 (Target : out Exception_Occurrence;
434 Source : Exception_Occurrence);
435 -- Copy all the components of Source to Target, except the
436 -- Private_Data pointer.
437
438 procedure Transfer_Occurrence
439 (Target : Exception_Occurrence_Access;
440 Source : Exception_Occurrence);
441 pragma Export (C, Transfer_Occurrence, "__gnat_transfer_occurrence");
442 -- Called from System.Tasking.RendezVous.Exceptional_Complete_RendezVous
443 -- to setup Target from Source as an exception to be propagated in the
444 -- caller task. Target is expected to be a pointer to the fixed TSD
445 -- occurrence for this task.
446
447 -----------------------------
448 -- Run-Time Check Routines --
449 -----------------------------
450
451 -- These routines are called from the runtime to raise a specific
452 -- exception with a reason message attached. The parameters are
453 -- the file name and line number in each case. The names are keyed
454 -- to the codes defined in Types.ads and a-types.h (for example,
455 -- the name Rcheck_05 refers to the Reason whose Pos code is 5).
456
457 procedure Rcheck_00 (File : Big_String_Ptr; Line : Integer);
458 procedure Rcheck_01 (File : Big_String_Ptr; Line : Integer);
459 procedure Rcheck_02 (File : Big_String_Ptr; Line : Integer);
460 procedure Rcheck_03 (File : Big_String_Ptr; Line : Integer);
461 procedure Rcheck_04 (File : Big_String_Ptr; Line : Integer);
462 procedure Rcheck_05 (File : Big_String_Ptr; Line : Integer);
463 procedure Rcheck_06 (File : Big_String_Ptr; Line : Integer);
464 procedure Rcheck_07 (File : Big_String_Ptr; Line : Integer);
465 procedure Rcheck_08 (File : Big_String_Ptr; Line : Integer);
466 procedure Rcheck_09 (File : Big_String_Ptr; Line : Integer);
467 procedure Rcheck_10 (File : Big_String_Ptr; Line : Integer);
468 procedure Rcheck_11 (File : Big_String_Ptr; Line : Integer);
469 procedure Rcheck_12 (File : Big_String_Ptr; Line : Integer);
470 procedure Rcheck_13 (File : Big_String_Ptr; Line : Integer);
471 procedure Rcheck_14 (File : Big_String_Ptr; Line : Integer);
472 procedure Rcheck_15 (File : Big_String_Ptr; Line : Integer);
473 procedure Rcheck_16 (File : Big_String_Ptr; Line : Integer);
474 procedure Rcheck_17 (File : Big_String_Ptr; Line : Integer);
475 procedure Rcheck_18 (File : Big_String_Ptr; Line : Integer);
476 procedure Rcheck_19 (File : Big_String_Ptr; Line : Integer);
477 procedure Rcheck_20 (File : Big_String_Ptr; Line : Integer);
478 procedure Rcheck_21 (File : Big_String_Ptr; Line : Integer);
479 procedure Rcheck_22 (File : Big_String_Ptr; Line : Integer);
480 procedure Rcheck_23 (File : Big_String_Ptr; Line : Integer);
481 procedure Rcheck_24 (File : Big_String_Ptr; Line : Integer);
482 procedure Rcheck_25 (File : Big_String_Ptr; Line : Integer);
483 procedure Rcheck_26 (File : Big_String_Ptr; Line : Integer);
484 procedure Rcheck_27 (File : Big_String_Ptr; Line : Integer);
485 procedure Rcheck_28 (File : Big_String_Ptr; Line : Integer);
486 procedure Rcheck_29 (File : Big_String_Ptr; Line : Integer);
487 procedure Rcheck_30 (File : Big_String_Ptr; Line : Integer);
488
489 pragma Export (C, Rcheck_00, "__gnat_rcheck_00");
490 pragma Export (C, Rcheck_01, "__gnat_rcheck_01");
491 pragma Export (C, Rcheck_02, "__gnat_rcheck_02");
492 pragma Export (C, Rcheck_03, "__gnat_rcheck_03");
493 pragma Export (C, Rcheck_04, "__gnat_rcheck_04");
494 pragma Export (C, Rcheck_05, "__gnat_rcheck_05");
495 pragma Export (C, Rcheck_06, "__gnat_rcheck_06");
496 pragma Export (C, Rcheck_07, "__gnat_rcheck_07");
497 pragma Export (C, Rcheck_08, "__gnat_rcheck_08");
498 pragma Export (C, Rcheck_09, "__gnat_rcheck_09");
499 pragma Export (C, Rcheck_10, "__gnat_rcheck_10");
500 pragma Export (C, Rcheck_11, "__gnat_rcheck_11");
501 pragma Export (C, Rcheck_12, "__gnat_rcheck_12");
502 pragma Export (C, Rcheck_13, "__gnat_rcheck_13");
503 pragma Export (C, Rcheck_14, "__gnat_rcheck_14");
504 pragma Export (C, Rcheck_15, "__gnat_rcheck_15");
505 pragma Export (C, Rcheck_16, "__gnat_rcheck_16");
506 pragma Export (C, Rcheck_17, "__gnat_rcheck_17");
507 pragma Export (C, Rcheck_18, "__gnat_rcheck_18");
508 pragma Export (C, Rcheck_19, "__gnat_rcheck_19");
509 pragma Export (C, Rcheck_20, "__gnat_rcheck_20");
510 pragma Export (C, Rcheck_21, "__gnat_rcheck_21");
511 pragma Export (C, Rcheck_22, "__gnat_rcheck_22");
512 pragma Export (C, Rcheck_23, "__gnat_rcheck_23");
513 pragma Export (C, Rcheck_24, "__gnat_rcheck_24");
514 pragma Export (C, Rcheck_25, "__gnat_rcheck_25");
515 pragma Export (C, Rcheck_26, "__gnat_rcheck_26");
516 pragma Export (C, Rcheck_27, "__gnat_rcheck_27");
517 pragma Export (C, Rcheck_28, "__gnat_rcheck_28");
518 pragma Export (C, Rcheck_29, "__gnat_rcheck_29");
519 pragma Export (C, Rcheck_30, "__gnat_rcheck_30");
520
521 -- None of these procedures ever returns (they raise an exception!). By
522 -- using pragma No_Return, we ensure that any junk code after the call,
523 -- such as normal return epilog stuff, can be eliminated).
524
525 pragma No_Return (Rcheck_00);
526 pragma No_Return (Rcheck_01);
527 pragma No_Return (Rcheck_02);
528 pragma No_Return (Rcheck_03);
529 pragma No_Return (Rcheck_04);
530 pragma No_Return (Rcheck_05);
531 pragma No_Return (Rcheck_06);
532 pragma No_Return (Rcheck_07);
533 pragma No_Return (Rcheck_08);
534 pragma No_Return (Rcheck_09);
535 pragma No_Return (Rcheck_10);
536 pragma No_Return (Rcheck_11);
537 pragma No_Return (Rcheck_12);
538 pragma No_Return (Rcheck_13);
539 pragma No_Return (Rcheck_14);
540 pragma No_Return (Rcheck_15);
541 pragma No_Return (Rcheck_16);
542 pragma No_Return (Rcheck_17);
543 pragma No_Return (Rcheck_18);
544 pragma No_Return (Rcheck_19);
545 pragma No_Return (Rcheck_20);
546 pragma No_Return (Rcheck_21);
547 pragma No_Return (Rcheck_22);
548 pragma No_Return (Rcheck_23);
549 pragma No_Return (Rcheck_24);
550 pragma No_Return (Rcheck_25);
551 pragma No_Return (Rcheck_26);
552 pragma No_Return (Rcheck_27);
553 pragma No_Return (Rcheck_28);
554 pragma No_Return (Rcheck_29);
555 pragma No_Return (Rcheck_30);
556
557 ---------------------------------------------
558 -- Reason Strings for Run-Time Check Calls --
559 ---------------------------------------------
560
561 -- These strings are null-terminated and are used by Rcheck_nn. The
562 -- strings correspond to the definitions for Types.RT_Exception_Code.
563
564 use ASCII;
565
566 Rmsg_00 : constant String := "access check failed" & NUL;
567 Rmsg_01 : constant String := "access parameter is null" & NUL;
568 Rmsg_02 : constant String := "discriminant check failed" & NUL;
569 Rmsg_03 : constant String := "divide by zero" & NUL;
570 Rmsg_04 : constant String := "explicit raise" & NUL;
571 Rmsg_05 : constant String := "index check failed" & NUL;
572 Rmsg_06 : constant String := "invalid data" & NUL;
573 Rmsg_07 : constant String := "length check failed" & NUL;
574 Rmsg_08 : constant String := "null-exclusion check failed" & NUL;
575 Rmsg_09 : constant String := "overflow check failed" & NUL;
576 Rmsg_10 : constant String := "partition check failed" & NUL;
577 Rmsg_11 : constant String := "range check failed" & NUL;
578 Rmsg_12 : constant String := "tag check failed" & NUL;
579 Rmsg_13 : constant String := "access before elaboration" & NUL;
580 Rmsg_14 : constant String := "accessibility check failed" & NUL;
581 Rmsg_15 : constant String := "all guards closed" & NUL;
582 Rmsg_16 : constant String := "duplicated entry address" & NUL;
583 Rmsg_17 : constant String := "explicit raise" & NUL;
584 Rmsg_18 : constant String := "finalize/adjust raised exception" & NUL;
585 Rmsg_19 : constant String := "misaligned address value" & NUL;
586 Rmsg_20 : constant String := "missing return" & NUL;
587 Rmsg_21 : constant String := "overlaid controlled object" & NUL;
588 Rmsg_22 : constant String := "potentially blocking operation" & NUL;
589 Rmsg_23 : constant String := "stubbed subprogram called" & NUL;
590 Rmsg_24 : constant String := "unchecked union restriction" & NUL;
591 Rmsg_25 : constant String := "illegal use of"
592 & " remote access-to-class-wide type, see RM E.4(18)" & NUL;
593 Rmsg_26 : constant String := "empty storage pool" & NUL;
594 Rmsg_27 : constant String := "explicit raise" & NUL;
595 Rmsg_28 : constant String := "infinite recursion" & NUL;
596 Rmsg_29 : constant String := "object too large" & NUL;
597 Rmsg_30 : constant String := "restriction violation" & NUL;
598
599 -----------------------
600 -- Polling Interface --
601 -----------------------
602
603 type Unsigned is mod 2 ** 32;
604
605 Counter : Unsigned := 0;
606 pragma Warnings (Off, Counter);
607 -- This counter is provided for convenience. It can be used in Poll to
608 -- perform periodic but not systematic operations.
609
610 procedure Poll is separate;
611 -- The actual polling routine is separate, so that it can easily
612 -- be replaced with a target dependent version.
613
614 ---------
615 -- AAA --
616 ---------
617
618 -- This dummy procedure gives us the start of the PC range for addresses
619 -- within the exception unit itself. We hope that gigi/gcc keep all the
620 -- procedures in their original order!
621
622 procedure AAA is
623 begin
624 <<Start_Of_AAA>>
625 Code_Address_For_AAA := Start_Of_AAA'Address;
626 end AAA;
627
628 ----------------
629 -- Call_Chain --
630 ----------------
631
632 procedure Call_Chain (Excep : EOA) is separate;
633 -- The actual Call_Chain routine is separate, so that it can easily
634 -- be dummied out when no exception traceback information is needed.
635
636 ------------------------------
637 -- Current_Target_Exception --
638 ------------------------------
639
640 function Current_Target_Exception return Exception_Occurrence is
641 begin
642 return Null_Occurrence;
643 end Current_Target_Exception;
644
645 -------------------
646 -- EId_To_String --
647 -------------------
648
649 function EId_To_String (X : Exception_Id) return String
650 renames Stream_Attributes.EId_To_String;
651
652 ------------------
653 -- EO_To_String --
654 ------------------
655
656 -- We use the null string to represent the null occurrence, otherwise
657 -- we output the Exception_Information string for the occurrence.
658
659 function EO_To_String (X : Exception_Occurrence) return String
660 renames Stream_Attributes.EO_To_String;
661
662 ------------------------
663 -- Exception_Identity --
664 ------------------------
665
666 function Exception_Identity
667 (X : Exception_Occurrence)
668 return Exception_Id
669 is
670 begin
671 if X.Id = Null_Id then
672 raise Constraint_Error;
673 else
674 return X.Id;
675 end if;
676 end Exception_Identity;
677
678 ---------------------------
679 -- Exception_Information --
680 ---------------------------
681
682 function Exception_Information (X : Exception_Occurrence) return String is
683 begin
684 if X.Id = Null_Id then
685 raise Constraint_Error;
686 end if;
687
688 return Exception_Data.Exception_Information (X);
689 end Exception_Information;
690
691 -----------------------
692 -- Exception_Message --
693 -----------------------
694
695 function Exception_Message (X : Exception_Occurrence) return String is
696 begin
697 if X.Id = Null_Id then
698 raise Constraint_Error;
699 end if;
700
701 return X.Msg (1 .. X.Msg_Length);
702 end Exception_Message;
703
704 --------------------
705 -- Exception_Name --
706 --------------------
707
708 function Exception_Name (Id : Exception_Id) return String is
709 begin
710 if Id = null then
711 raise Constraint_Error;
712 end if;
713
714 return Id.Full_Name.all (1 .. Id.Name_Length - 1);
715 end Exception_Name;
716
717 function Exception_Name (X : Exception_Occurrence) return String is
718 begin
719 return Exception_Name (X.Id);
720 end Exception_Name;
721
722 ---------------------------
723 -- Exception_Name_Simple --
724 ---------------------------
725
726 function Exception_Name_Simple (X : Exception_Occurrence) return String is
727 Name : constant String := Exception_Name (X);
728 P : Natural;
729
730 begin
731 P := Name'Length;
732 while P > 1 loop
733 exit when Name (P - 1) = '.';
734 P := P - 1;
735 end loop;
736
737 -- Return result making sure lower bound is 1
738
739 declare
740 subtype Rname is String (1 .. Name'Length - P + 1);
741 begin
742 return Rname (Name (P .. Name'Length));
743 end;
744 end Exception_Name_Simple;
745
746 --------------------
747 -- Exception_Data --
748 --------------------
749
750 package body Exception_Data is separate;
751 -- This package can be easily dummied out if we do not want the
752 -- basic support for exception messages (such as in Ada 83).
753
754 ---------------------------
755 -- Exception_Propagation --
756 ---------------------------
757
758 package body Exception_Propagation is separate;
759 -- Depending on the actual exception mechanism used (front-end or
760 -- back-end based), the implementation will differ, which is why this
761 -- package is separated.
762
763 ----------------------
764 -- Exception_Traces --
765 ----------------------
766
767 package body Exception_Traces is separate;
768 -- Depending on the underlying support for IO the implementation
769 -- will differ. Moreover we would like to dummy out this package
770 -- in case we do not want any exception tracing support. This is
771 -- why this package is separated.
772
773 -----------------------
774 -- Stream Attributes --
775 -----------------------
776
777 package body Stream_Attributes is separate;
778 -- This package can be easily dummied out if we do not want the
779 -- support for streaming Exception_Ids and Exception_Occurrences.
780
781 -----------------------------
782 -- Process_Raise_Exception --
783 -----------------------------
784
785 procedure Process_Raise_Exception
786 (E : Exception_Id;
787 From_Signal_Handler : Boolean)
788 is
789 pragma Inspection_Point (E);
790 -- This is so the debugger can reliably inspect the parameter
791
792 Jumpbuf_Ptr : constant Address := Get_Jmpbuf_Address.all;
793 Excep : EOA := Get_Current_Excep.all;
794
795 begin
796 -- WARNING : There should be no exception handler for this body
797 -- because this would cause gigi to prepend a setup for a new
798 -- jmpbuf to the sequence of statements. We would then always get
799 -- this new buf in Jumpbuf_Ptr instead of the one for the exception
800 -- we are handling, which would completely break the whole design
801 -- of this procedure.
802
803 -- Processing varies between zero cost and setjmp/lonjmp processing.
804
805 if Zero_Cost_Exceptions /= 0 then
806
807 -- Use the front-end tables to propagate if we have them, otherwise
808 -- resort to the GCC back-end alternative. Backtrace computation is
809 -- performed, if required, by the underlying routine. Notifications
810 -- for the debugger are also not performed here, because we do not
811 -- yet know if the exception is handled.
812
813 Exception_Propagation.Propagate_Exception (From_Signal_Handler);
814
815 else
816 -- Compute the backtrace for this occurrence if the corresponding
817 -- binder option has been set. Call_Chain takes care of the reraise
818 -- case.
819
820 Call_Chain (Excep);
821 -- We used to only do this if From_Signal_Handler was not set,
822 -- based on the assumption that backtracing from a signal handler
823 -- would not work due to stack layout oddities. However, since
824 --
825 -- 1. The flag is never set in tasking programs (Notify_Exception
826 -- performs regular raise statements), and
827 --
828 -- 2. No problem has shown up in tasking programs around here so
829 -- far, this turned out to be too strong an assumption.
830 --
831 -- As, in addition, the test was
832 --
833 -- 1. preventing the production of backtraces in non-tasking
834 -- programs, and
835 --
836 -- 2. introducing a behavior inconsistency between
837 -- the tasking and non-tasking cases,
838 --
839 -- we have simply removed it.
840
841 -- If the jump buffer pointer is non-null, transfer control using
842 -- it. Otherwise announce an unhandled exception (note that this
843 -- means that we have no finalizations to do other than at the outer
844 -- level). Perform the necessary notification tasks in both cases.
845
846 if Jumpbuf_Ptr /= Null_Address then
847
848 if not Excep.Exception_Raised then
849 Excep.Exception_Raised := True;
850 Exception_Traces.Notify_Handled_Exception;
851 end if;
852
853 builtin_longjmp (Jumpbuf_Ptr, 1);
854
855 else
856 -- The pragma Inspection point here ensures that the debugger
857 -- can inspect the parameter.
858
859 pragma Inspection_Point (E);
860
861 Exception_Traces.Notify_Unhandled_Exception;
862 Exception_Traces.Unhandled_Exception_Terminate;
863 end if;
864 end if;
865 end Process_Raise_Exception;
866
867 ----------------------------
868 -- Raise_Constraint_Error --
869 ----------------------------
870
871 procedure Raise_Constraint_Error
872 (File : Big_String_Ptr;
873 Line : Integer)
874 is
875 begin
876 Raise_With_Location_And_Msg
877 (Constraint_Error_Def'Access, File, Line);
878 end Raise_Constraint_Error;
879
880 --------------------------------
881 -- Raise_Constraint_Error_Msg --
882 --------------------------------
883
884 procedure Raise_Constraint_Error_Msg
885 (File : Big_String_Ptr;
886 Line : Integer;
887 Msg : Big_String_Ptr)
888 is
889 begin
890 Raise_With_Location_And_Msg
891 (Constraint_Error_Def'Access, File, Line, Msg);
892 end Raise_Constraint_Error_Msg;
893
894 -------------------------
895 -- Raise_Current_Excep --
896 -------------------------
897
898 procedure Raise_Current_Excep (E : Exception_Id) is
899 pragma Inspection_Point (E);
900 -- This is so the debugger can reliably inspect the parameter
901 begin
902 Process_Raise_Exception (E => E, From_Signal_Handler => False);
903 end Raise_Current_Excep;
904
905 ---------------------
906 -- Raise_Exception --
907 ---------------------
908
909 procedure Raise_Exception
910 (E : Exception_Id;
911 Message : String := "")
912 is
913 begin
914 if E /= null then
915 Exception_Data.Set_Exception_Msg (E, Message);
916 Abort_Defer.all;
917 Raise_Current_Excep (E);
918 end if;
919 end Raise_Exception;
920
921 ----------------------------
922 -- Raise_Exception_Always --
923 ----------------------------
924
925 procedure Raise_Exception_Always
926 (E : Exception_Id;
927 Message : String := "")
928 is
929 begin
930 Exception_Data.Set_Exception_Msg (E, Message);
931 Abort_Defer.all;
932 Raise_Current_Excep (E);
933 end Raise_Exception_Always;
934
935 -------------------------------
936 -- Raise_From_Signal_Handler --
937 -------------------------------
938
939 procedure Raise_From_Signal_Handler
940 (E : Exception_Id;
941 M : Big_String_Ptr)
942 is
943 begin
944 Exception_Data.Set_Exception_C_Msg (E, M);
945 Abort_Defer.all;
946 Process_Raise_Exception (E => E, From_Signal_Handler => True);
947 end Raise_From_Signal_Handler;
948
949 -------------------------
950 -- Raise_Program_Error --
951 -------------------------
952
953 procedure Raise_Program_Error
954 (File : Big_String_Ptr;
955 Line : Integer)
956 is
957 begin
958 Raise_With_Location_And_Msg
959 (Program_Error_Def'Access, File, Line);
960 end Raise_Program_Error;
961
962 -----------------------------
963 -- Raise_Program_Error_Msg --
964 -----------------------------
965
966 procedure Raise_Program_Error_Msg
967 (File : Big_String_Ptr;
968 Line : Integer;
969 Msg : Big_String_Ptr)
970 is
971 begin
972 Raise_With_Location_And_Msg
973 (Program_Error_Def'Access, File, Line, Msg);
974 end Raise_Program_Error_Msg;
975
976 -------------------------
977 -- Raise_Storage_Error --
978 -------------------------
979
980 procedure Raise_Storage_Error
981 (File : Big_String_Ptr;
982 Line : Integer)
983 is
984 begin
985 Raise_With_Location_And_Msg
986 (Storage_Error_Def'Access, File, Line);
987 end Raise_Storage_Error;
988
989 -----------------------------
990 -- Raise_Storage_Error_Msg --
991 -----------------------------
992
993 procedure Raise_Storage_Error_Msg
994 (File : Big_String_Ptr;
995 Line : Integer;
996 Msg : Big_String_Ptr)
997 is
998 begin
999 Raise_With_Location_And_Msg
1000 (Storage_Error_Def'Access, File, Line, Msg);
1001 end Raise_Storage_Error_Msg;
1002
1003 ---------------------------------
1004 -- Raise_With_Location_And_Msg --
1005 ---------------------------------
1006
1007 procedure Raise_With_Location_And_Msg
1008 (E : Exception_Id;
1009 F : Big_String_Ptr;
1010 L : Integer;
1011 M : Big_String_Ptr := null)
1012 is
1013 begin
1014 Exception_Data.Set_Exception_C_Msg (E, F, L, M);
1015 Abort_Defer.all;
1016 Raise_Current_Excep (E);
1017 end Raise_With_Location_And_Msg;
1018
1019 --------------------
1020 -- Raise_With_Msg --
1021 --------------------
1022
1023 procedure Raise_With_Msg (E : Exception_Id) is
1024 Excep : constant EOA := Get_Current_Excep.all;
1025
1026 begin
1027 Exception_Propagation.Setup_Exception (Excep, Excep);
1028
1029 Excep.Exception_Raised := False;
1030 Excep.Id := E;
1031 Excep.Num_Tracebacks := 0;
1032 Excep.Cleanup_Flag := False;
1033 Excep.Pid := Local_Partition_ID;
1034 Abort_Defer.all;
1035 Raise_Current_Excep (E);
1036 end Raise_With_Msg;
1037
1038 --------------------------------------
1039 -- Calls to Run-Time Check Routines --
1040 --------------------------------------
1041
1042 procedure Rcheck_00 (File : Big_String_Ptr; Line : Integer) is
1043 begin
1044 Raise_Constraint_Error_Msg (File, Line, To_Ptr (Rmsg_00'Address));
1045 end Rcheck_00;
1046
1047 procedure Rcheck_01 (File : Big_String_Ptr; Line : Integer) is
1048 begin
1049 Raise_Constraint_Error_Msg (File, Line, To_Ptr (Rmsg_01'Address));
1050 end Rcheck_01;
1051
1052 procedure Rcheck_02 (File : Big_String_Ptr; Line : Integer) is
1053 begin
1054 Raise_Constraint_Error_Msg (File, Line, To_Ptr (Rmsg_02'Address));
1055 end Rcheck_02;
1056
1057 procedure Rcheck_03 (File : Big_String_Ptr; Line : Integer) is
1058 begin
1059 Raise_Constraint_Error_Msg (File, Line, To_Ptr (Rmsg_03'Address));
1060 end Rcheck_03;
1061
1062 procedure Rcheck_04 (File : Big_String_Ptr; Line : Integer) is
1063 begin
1064 Raise_Constraint_Error_Msg (File, Line, To_Ptr (Rmsg_04'Address));
1065 end Rcheck_04;
1066
1067 procedure Rcheck_05 (File : Big_String_Ptr; Line : Integer) is
1068 begin
1069 Raise_Constraint_Error_Msg (File, Line, To_Ptr (Rmsg_05'Address));
1070 end Rcheck_05;
1071
1072 procedure Rcheck_06 (File : Big_String_Ptr; Line : Integer) is
1073 begin
1074 Raise_Constraint_Error_Msg (File, Line, To_Ptr (Rmsg_06'Address));
1075 end Rcheck_06;
1076
1077 procedure Rcheck_07 (File : Big_String_Ptr; Line : Integer) is
1078 begin
1079 Raise_Constraint_Error_Msg (File, Line, To_Ptr (Rmsg_07'Address));
1080 end Rcheck_07;
1081
1082 procedure Rcheck_08 (File : Big_String_Ptr; Line : Integer) is
1083 begin
1084 Raise_Constraint_Error_Msg (File, Line, To_Ptr (Rmsg_08'Address));
1085 end Rcheck_08;
1086
1087 procedure Rcheck_09 (File : Big_String_Ptr; Line : Integer) is
1088 begin
1089 Raise_Constraint_Error_Msg (File, Line, To_Ptr (Rmsg_09'Address));
1090 end Rcheck_09;
1091
1092 procedure Rcheck_10 (File : Big_String_Ptr; Line : Integer) is
1093 begin
1094 Raise_Constraint_Error_Msg (File, Line, To_Ptr (Rmsg_10'Address));
1095 end Rcheck_10;
1096
1097 procedure Rcheck_11 (File : Big_String_Ptr; Line : Integer) is
1098 begin
1099 Raise_Constraint_Error_Msg (File, Line, To_Ptr (Rmsg_11'Address));
1100 end Rcheck_11;
1101
1102 procedure Rcheck_12 (File : Big_String_Ptr; Line : Integer) is
1103 begin
1104 Raise_Constraint_Error_Msg (File, Line, To_Ptr (Rmsg_12'Address));
1105 end Rcheck_12;
1106
1107 procedure Rcheck_13 (File : Big_String_Ptr; Line : Integer) is
1108 begin
1109 Raise_Program_Error_Msg (File, Line, To_Ptr (Rmsg_13'Address));
1110 end Rcheck_13;
1111
1112 procedure Rcheck_14 (File : Big_String_Ptr; Line : Integer) is
1113 begin
1114 Raise_Program_Error_Msg (File, Line, To_Ptr (Rmsg_14'Address));
1115 end Rcheck_14;
1116
1117 procedure Rcheck_15 (File : Big_String_Ptr; Line : Integer) is
1118 begin
1119 Raise_Program_Error_Msg (File, Line, To_Ptr (Rmsg_15'Address));
1120 end Rcheck_15;
1121
1122 procedure Rcheck_16 (File : Big_String_Ptr; Line : Integer) is
1123 begin
1124 Raise_Program_Error_Msg (File, Line, To_Ptr (Rmsg_16'Address));
1125 end Rcheck_16;
1126
1127 procedure Rcheck_17 (File : Big_String_Ptr; Line : Integer) is
1128 begin
1129 Raise_Program_Error_Msg (File, Line, To_Ptr (Rmsg_17'Address));
1130 end Rcheck_17;
1131
1132 procedure Rcheck_18 (File : Big_String_Ptr; Line : Integer) is
1133 begin
1134 Raise_Program_Error_Msg (File, Line, To_Ptr (Rmsg_18'Address));
1135 end Rcheck_18;
1136
1137 procedure Rcheck_19 (File : Big_String_Ptr; Line : Integer) is
1138 begin
1139 Raise_Program_Error_Msg (File, Line, To_Ptr (Rmsg_19'Address));
1140 end Rcheck_19;
1141
1142 procedure Rcheck_20 (File : Big_String_Ptr; Line : Integer) is
1143 begin
1144 Raise_Program_Error_Msg (File, Line, To_Ptr (Rmsg_20'Address));
1145 end Rcheck_20;
1146
1147 procedure Rcheck_21 (File : Big_String_Ptr; Line : Integer) is
1148 begin
1149 Raise_Program_Error_Msg (File, Line, To_Ptr (Rmsg_21'Address));
1150 end Rcheck_21;
1151
1152 procedure Rcheck_22 (File : Big_String_Ptr; Line : Integer) is
1153 begin
1154 Raise_Program_Error_Msg (File, Line, To_Ptr (Rmsg_22'Address));
1155 end Rcheck_22;
1156
1157 procedure Rcheck_23 (File : Big_String_Ptr; Line : Integer) is
1158 begin
1159 Raise_Program_Error_Msg (File, Line, To_Ptr (Rmsg_23'Address));
1160 end Rcheck_23;
1161
1162 procedure Rcheck_24 (File : Big_String_Ptr; Line : Integer) is
1163 begin
1164 Raise_Program_Error_Msg (File, Line, To_Ptr (Rmsg_24'Address));
1165 end Rcheck_24;
1166
1167 procedure Rcheck_25 (File : Big_String_Ptr; Line : Integer) is
1168 begin
1169 Raise_Program_Error_Msg (File, Line, To_Ptr (Rmsg_25'Address));
1170 end Rcheck_25;
1171
1172 procedure Rcheck_26 (File : Big_String_Ptr; Line : Integer) is
1173 begin
1174 Raise_Storage_Error_Msg (File, Line, To_Ptr (Rmsg_26'Address));
1175 end Rcheck_26;
1176
1177 procedure Rcheck_27 (File : Big_String_Ptr; Line : Integer) is
1178 begin
1179 Raise_Storage_Error_Msg (File, Line, To_Ptr (Rmsg_27'Address));
1180 end Rcheck_27;
1181
1182 procedure Rcheck_28 (File : Big_String_Ptr; Line : Integer) is
1183 begin
1184 Raise_Storage_Error_Msg (File, Line, To_Ptr (Rmsg_28'Address));
1185 end Rcheck_28;
1186
1187 procedure Rcheck_29 (File : Big_String_Ptr; Line : Integer) is
1188 begin
1189 Raise_Storage_Error_Msg (File, Line, To_Ptr (Rmsg_29'Address));
1190 end Rcheck_29;
1191
1192 procedure Rcheck_30 (File : Big_String_Ptr; Line : Integer) is
1193 begin
1194 Raise_Storage_Error_Msg (File, Line, To_Ptr (Rmsg_30'Address));
1195 end Rcheck_30;
1196
1197 -------------
1198 -- Reraise --
1199 -------------
1200
1201 procedure Reraise is
1202 Excep : constant EOA := Get_Current_Excep.all;
1203
1204 begin
1205 Abort_Defer.all;
1206 Exception_Propagation.Setup_Exception (Excep, Excep, Reraised => True);
1207 Raise_Current_Excep (Excep.Id);
1208 end Reraise;
1209
1210 ------------------------
1211 -- Reraise_Occurrence --
1212 ------------------------
1213
1214 procedure Reraise_Occurrence (X : Exception_Occurrence) is
1215 begin
1216 if X.Id /= null then
1217 Abort_Defer.all;
1218 Exception_Propagation.Setup_Exception
1219 (X'Unrestricted_Access, Get_Current_Excep.all, Reraised => True);
1220 Save_Occurrence_No_Private (Get_Current_Excep.all.all, X);
1221 Raise_Current_Excep (X.Id);
1222 end if;
1223 end Reraise_Occurrence;
1224
1225 -------------------------------
1226 -- Reraise_Occurrence_Always --
1227 -------------------------------
1228
1229 procedure Reraise_Occurrence_Always (X : Exception_Occurrence) is
1230 begin
1231 Abort_Defer.all;
1232 Exception_Propagation.Setup_Exception
1233 (X'Unrestricted_Access, Get_Current_Excep.all, Reraised => True);
1234 Save_Occurrence_No_Private (Get_Current_Excep.all.all, X);
1235 Raise_Current_Excep (X.Id);
1236 end Reraise_Occurrence_Always;
1237
1238 ---------------------------------
1239 -- Reraise_Occurrence_No_Defer --
1240 ---------------------------------
1241
1242 procedure Reraise_Occurrence_No_Defer (X : Exception_Occurrence) is
1243 begin
1244 Exception_Propagation.Setup_Exception
1245 (X'Unrestricted_Access, Get_Current_Excep.all, Reraised => True);
1246 Save_Occurrence_No_Private (Get_Current_Excep.all.all, X);
1247 Raise_Current_Excep (X.Id);
1248 end Reraise_Occurrence_No_Defer;
1249
1250 ---------------------
1251 -- Save_Occurrence --
1252 ---------------------
1253
1254 procedure Save_Occurrence
1255 (Target : out Exception_Occurrence;
1256 Source : Exception_Occurrence)
1257 is
1258 begin
1259 Save_Occurrence_No_Private (Target, Source);
1260 end Save_Occurrence;
1261
1262 function Save_Occurrence
1263 (Source : Exception_Occurrence)
1264 return EOA
1265 is
1266 Target : EOA := new Exception_Occurrence;
1267
1268 begin
1269 Save_Occurrence (Target.all, Source);
1270 return Target;
1271 end Save_Occurrence;
1272
1273 --------------------------------
1274 -- Save_Occurrence_And_Private --
1275 --------------------------------
1276
1277 procedure Save_Occurrence_And_Private
1278 (Target : out Exception_Occurrence;
1279 Source : Exception_Occurrence)
1280 is
1281 begin
1282 Save_Occurrence_No_Private (Target, Source);
1283 Target.Private_Data := Source.Private_Data;
1284 end Save_Occurrence_And_Private;
1285
1286 --------------------------------
1287 -- Save_Occurrence_No_Private --
1288 --------------------------------
1289
1290 procedure Save_Occurrence_No_Private
1291 (Target : out Exception_Occurrence;
1292 Source : Exception_Occurrence)
1293 is
1294 begin
1295 Target.Id := Source.Id;
1296 Target.Msg_Length := Source.Msg_Length;
1297 Target.Num_Tracebacks := Source.Num_Tracebacks;
1298 Target.Pid := Source.Pid;
1299 Target.Cleanup_Flag := Source.Cleanup_Flag;
1300
1301 Target.Msg (1 .. Target.Msg_Length) :=
1302 Source.Msg (1 .. Target.Msg_Length);
1303
1304 Target.Tracebacks (1 .. Target.Num_Tracebacks) :=
1305 Source.Tracebacks (1 .. Target.Num_Tracebacks);
1306 end Save_Occurrence_No_Private;
1307
1308 -------------------------
1309 -- Transfer_Occurrence --
1310 -------------------------
1311
1312 procedure Transfer_Occurrence
1313 (Target : Exception_Occurrence_Access;
1314 Source : Exception_Occurrence)
1315 is
1316 begin
1317 -- Setup Target as an exception to be propagated in the calling task
1318 -- (rendezvous-wise), taking care not to clobber the associated private
1319 -- data. Target is expected to be a pointer to the calling task's
1320 -- fixed TSD occurrence, which is very different from Get_Current_Excep
1321 -- here because this subprogram is called from the called task.
1322
1323 Exception_Propagation.Setup_Exception (Target, Target);
1324 Save_Occurrence_No_Private (Target.all, Source);
1325 end Transfer_Occurrence;
1326
1327 -------------------
1328 -- String_To_EId --
1329 -------------------
1330
1331 function String_To_EId (S : String) return Exception_Id
1332 renames Stream_Attributes.String_To_EId;
1333
1334 ------------------
1335 -- String_To_EO --
1336 ------------------
1337
1338 function String_To_EO (S : String) return Exception_Occurrence
1339 renames Stream_Attributes.String_To_EO;
1340
1341 ------------------------------
1342 -- Raise_Exception_No_Defer --
1343 ------------------------------
1344
1345 procedure Raise_Exception_No_Defer
1346 (E : Exception_Id;
1347 Message : String := "")
1348 is
1349 begin
1350 Exception_Data.Set_Exception_Msg (E, Message);
1351
1352 -- DO NOT CALL Abort_Defer.all; !!!!
1353 -- why not??? would be nice to have more comments here
1354
1355 Raise_Current_Excep (E);
1356 end Raise_Exception_No_Defer;
1357
1358 ---------------
1359 -- To_Stderr --
1360 ---------------
1361
1362 procedure To_Stderr (C : Character) is
1363
1364 type int is new Integer;
1365
1366 procedure put_char_stderr (C : int);
1367 pragma Import (C, put_char_stderr, "put_char_stderr");
1368
1369 begin
1370 put_char_stderr (Character'Pos (C));
1371 end To_Stderr;
1372
1373 procedure To_Stderr (S : String) is
1374 begin
1375 for J in S'Range loop
1376 if S (J) /= ASCII.CR then
1377 To_Stderr (S (J));
1378 end if;
1379 end loop;
1380 end To_Stderr;
1381
1382 ---------
1383 -- ZZZ --
1384 ---------
1385
1386 -- This dummy procedure gives us the end of the PC range for addresses
1387 -- within the exception unit itself. We hope that gigi/gcc keeps all the
1388 -- procedures in their original order!
1389
1390 procedure ZZZ is
1391 begin
1392 <<Start_Of_ZZZ>>
1393 Code_Address_For_ZZZ := Start_Of_ZZZ'Address;
1394 end ZZZ;
1395
1396 begin
1397 -- Allocate the Non-Tasking Machine_State
1398
1399 Set_Machine_State_Addr_NT (System.Address (Allocate_Machine_State));
1400
1401 -- Call the AAA/ZZZ routines to setup the code addresses for the
1402 -- bounds of this unit.
1403
1404 AAA;
1405 ZZZ;
1406 end Ada.Exceptions;
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