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2009-07-17 Richard Guenther <rguenther@suse.de>
[official-gcc.git] / gcc / ada / lib-writ.adb
blob94d4b45552671af6dcc94d9f27b6bef28c969ef7
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- L I B . W R I T --
6 -- --
7 -- B o d y --
8 -- --
9 -- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
10 -- --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. 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 COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
20 -- --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
23 -- --
24 ------------------------------------------------------------------------------
25
26 with ALI; use ALI;
27 with Atree; use Atree;
28 with Casing; use Casing;
29 with Einfo; use Einfo;
30 with Errout; use Errout;
31 with Fname; use Fname;
32 with Fname.UF; use Fname.UF;
33 with Lib.Util; use Lib.Util;
34 with Lib.Xref; use Lib.Xref;
35 with Nlists; use Nlists;
36 with Gnatvsn; use Gnatvsn;
37 with Opt; use Opt;
38 with Osint; use Osint;
39 with Osint.C; use Osint.C;
40 with Par;
41 with Par_SCO; use Par_SCO;
42 with Restrict; use Restrict;
43 with Rident; use Rident;
44 with Scn; use Scn;
45 with Sinfo; use Sinfo;
46 with Sinput; use Sinput;
47 with Snames; use Snames;
48 with Stringt; use Stringt;
49 with Tbuild; use Tbuild;
50 with Uname; use Uname;
51
52 with System.Case_Util; use System.Case_Util;
53 with System.WCh_Con; use System.WCh_Con;
54
55 package body Lib.Writ is
56
57 -----------------------
58 -- Local Subprograms --
59 -----------------------
60
61 procedure Write_Unit_Name (N : Node_Id);
62 -- Used to write out the unit name for R (pragma Restriction) lines
63 -- for uses of Restriction (No_Dependence => unit-name).
64
65 ----------------------------------
66 -- Add_Preprocessing_Dependency --
67 ----------------------------------
68
69 procedure Add_Preprocessing_Dependency (S : Source_File_Index) is
70 begin
71 Units.Increment_Last;
72 Units.Table (Units.Last) :=
73 (Unit_File_Name => File_Name (S),
74 Unit_Name => No_Unit_Name,
75 Expected_Unit => No_Unit_Name,
76 Source_Index => S,
77 Cunit => Empty,
78 Cunit_Entity => Empty,
79 Dependency_Num => 0,
80 Dynamic_Elab => False,
81 Fatal_Error => False,
82 Generate_Code => False,
83 Has_RACW => False,
84 Is_Compiler_Unit => False,
85 Ident_String => Empty,
86 Loading => False,
87 Main_Priority => -1,
88 Munit_Index => 0,
89 Serial_Number => 0,
90 Version => 0,
91 Error_Location => No_Location,
92 OA_Setting => 'O');
93 end Add_Preprocessing_Dependency;
94
95 ------------------------------
96 -- Ensure_System_Dependency --
97 ------------------------------
98
99 procedure Ensure_System_Dependency is
100 System_Uname : Unit_Name_Type;
101 -- Unit name for system spec if needed for dummy entry
102
103 System_Fname : File_Name_Type;
104 -- File name for system spec if needed for dummy entry
105
106 begin
107 -- Nothing to do if we already compiled System
108
109 for Unum in Units.First .. Last_Unit loop
110 if Units.Table (Unum).Source_Index = System_Source_File_Index then
111 return;
112 end if;
113 end loop;
114
115 -- If no entry for system.ads in the units table, then add a entry
116 -- to the units table for system.ads, which will be referenced when
117 -- the ali file is generated. We need this because every unit depends
118 -- on system as a result of Targparm scanning the system.ads file to
119 -- determine the target dependent parameters for the compilation.
120
121 Name_Len := 6;
122 Name_Buffer (1 .. 6) := "system";
123 System_Uname := Name_To_Unit_Name (Name_Enter);
124 System_Fname := File_Name (System_Source_File_Index);
125
126 Units.Increment_Last;
127 Units.Table (Units.Last) := (
128 Unit_File_Name => System_Fname,
129 Unit_Name => System_Uname,
130 Expected_Unit => System_Uname,
131 Source_Index => System_Source_File_Index,
132 Cunit => Empty,
133 Cunit_Entity => Empty,
134 Dependency_Num => 0,
135 Dynamic_Elab => False,
136 Fatal_Error => False,
137 Generate_Code => False,
138 Has_RACW => False,
139 Is_Compiler_Unit => False,
140 Ident_String => Empty,
141 Loading => False,
142 Main_Priority => -1,
143 Munit_Index => 0,
144 Serial_Number => 0,
145 Version => 0,
146 Error_Location => No_Location,
147 OA_Setting => 'O');
148
149 -- Parse system.ads so that the checksum is set right
150 -- Style checks are not applied.
151
152 declare
153 Save_Mindex : constant Nat := Multiple_Unit_Index;
154 Save_Style : constant Boolean := Style_Check;
155 begin
156 Multiple_Unit_Index := 0;
157 Style_Check := False;
158 Initialize_Scanner (Units.Last, System_Source_File_Index);
159 Discard_List (Par (Configuration_Pragmas => False));
160 Style_Check := Save_Style;
161 Multiple_Unit_Index := Save_Mindex;
162 end;
163 end Ensure_System_Dependency;
164
165 ---------------
166 -- Write_ALI --
167 ---------------
168
169 procedure Write_ALI (Object : Boolean) is
170
171 ----------------
172 -- Local Data --
173 ----------------
174
175 Last_Unit : constant Unit_Number_Type := Units.Last;
176 -- Record unit number of last unit. We capture this in case we
177 -- have to add a dummy entry to the unit table for package System.
178
179 With_Flags : array (Units.First .. Last_Unit) of Boolean;
180 -- Array of flags to show which units are with'ed
181
182 Elab_Flags : array (Units.First .. Last_Unit) of Boolean;
183 -- Array of flags to show which units have pragma Elaborate set
184
185 Elab_All_Flags : array (Units.First .. Last_Unit) of Boolean;
186 -- Array of flags to show which units have pragma Elaborate All set
187
188 Elab_Des_Flags : array (Units.First .. Last_Unit) of Boolean;
189 -- Array of flags to show which units have Elaborate_Desirable set
190
191 Elab_All_Des_Flags : array (Units.First .. Last_Unit) of Boolean;
192 -- Array of flags to show which units have Elaborate_All_Desirable set
193
194 Sdep_Table : Unit_Ref_Table (1 .. Pos (Last_Unit - Units.First + 2));
195 -- Sorted table of source dependencies. One extra entry in case we
196 -- have to add a dummy entry for System.
197
198 Num_Sdep : Nat := 0;
199 -- Number of active entries in Sdep_Table
200
201 flag_compare_debug : Int;
202 pragma Import (C, flag_compare_debug);
203 -- Import from toplev.c
204
205 -----------------------
206 -- Local Subprograms --
207 -----------------------
208
209 procedure Collect_Withs (Cunit : Node_Id);
210 -- Collect with lines for entries in the context clause of the
211 -- given compilation unit, Cunit.
212
213 procedure Update_Tables_From_ALI_File;
214 -- Given an up to date ALI file (see Up_To_Date_ALI_file_Exists
215 -- function), update tables from the ALI information, including
216 -- specifically the Compilation_Switches table.
217
218 function Up_To_Date_ALI_File_Exists return Boolean;
219 -- If there exists an ALI file that is up to date, then this function
220 -- initializes the tables in the ALI spec to contain information on
221 -- this file (using Scan_ALI) and returns True. If no file exists,
222 -- or the file is not up to date, then False is returned.
223
224 procedure Write_Unit_Information (Unit_Num : Unit_Number_Type);
225 -- Write out the library information for one unit for which code is
226 -- generated (includes unit line and with lines).
227
228 procedure Write_With_Lines;
229 -- Write out with lines collected by calls to Collect_Withs
230
231 -------------------
232 -- Collect_Withs --
233 -------------------
234
235 procedure Collect_Withs (Cunit : Node_Id) is
236 Item : Node_Id;
237 Unum : Unit_Number_Type;
238
239 begin
240 Item := First (Context_Items (Cunit));
241 while Present (Item) loop
242
243 -- Process with clause
244
245 -- Ada 2005 (AI-50217): limited with_clauses do not create
246 -- dependencies, but must be recorded as components of the
247 -- partition, in case there is no regular with_clause for
248 -- the unit anywhere else.
249
250 if Nkind (Item) = N_With_Clause then
251 Unum := Get_Cunit_Unit_Number (Library_Unit (Item));
252 With_Flags (Unum) := True;
253
254 if not Limited_Present (Item) then
255 if Elaborate_Present (Item) then
256 Elab_Flags (Unum) := True;
257 end if;
258
259 if Elaborate_All_Present (Item) then
260 Elab_All_Flags (Unum) := True;
261 end if;
262
263 if Elaborate_All_Desirable (Item) then
264 Elab_All_Des_Flags (Unum) := True;
265 end if;
266
267 if Elaborate_Desirable (Item) then
268 Elab_Des_Flags (Unum) := True;
269 end if;
270
271 else
272 Set_From_With_Type (Cunit_Entity (Unum));
273 end if;
274 end if;
275
276 Next (Item);
277 end loop;
278 end Collect_Withs;
279
280 --------------------------------
281 -- Up_To_Date_ALI_File_Exists --
282 --------------------------------
283
284 function Up_To_Date_ALI_File_Exists return Boolean is
285 Name : File_Name_Type;
286 Text : Text_Buffer_Ptr;
287 Id : Sdep_Id;
288 Sind : Source_File_Index;
289
290 begin
291 Opt.Check_Object_Consistency := True;
292 Read_Library_Info (Name, Text);
293
294 -- Return if we could not find an ALI file
295
296 if Text = null then
297 return False;
298 end if;
299
300 -- Return if ALI file has bad format
301
302 Initialize_ALI;
303
304 if Scan_ALI (Name, Text, False, Err => True) = No_ALI_Id then
305 return False;
306 end if;
307
308 -- If we have an OK ALI file, check if it is up to date
309 -- Note that we assume that the ALI read has all the entries
310 -- we have in our table, plus some additional ones (that can
311 -- come from expansion).
312
313 Id := First_Sdep_Entry;
314 for J in 1 .. Num_Sdep loop
315 Sind := Units.Table (Sdep_Table (J)).Source_Index;
316
317 while Sdep.Table (Id).Sfile /= File_Name (Sind) loop
318 if Id = Sdep.Last then
319 return False;
320 else
321 Id := Id + 1;
322 end if;
323 end loop;
324
325 if Sdep.Table (Id).Stamp /= Time_Stamp (Sind) then
326 return False;
327 end if;
328 end loop;
329
330 return True;
331 end Up_To_Date_ALI_File_Exists;
332
333 ---------------------------------
334 -- Update_Tables_From_ALI_File --
335 ---------------------------------
336
337 procedure Update_Tables_From_ALI_File is
338 begin
339 -- Build Compilation_Switches table
340
341 Compilation_Switches.Init;
342
343 for J in First_Arg_Entry .. Args.Last loop
344 Compilation_Switches.Increment_Last;
345 Compilation_Switches.Table (Compilation_Switches.Last) :=
346 Args.Table (J);
347 end loop;
348 end Update_Tables_From_ALI_File;
349
350 ----------------------------
351 -- Write_Unit_Information --
352 ----------------------------
353
354 procedure Write_Unit_Information (Unit_Num : Unit_Number_Type) is
355 Unode : constant Node_Id := Cunit (Unit_Num);
356 Ukind : constant Node_Kind := Nkind (Unit (Unode));
357 Uent : constant Entity_Id := Cunit_Entity (Unit_Num);
358 Pnode : Node_Id;
359
360 begin
361 Write_Info_Initiate ('U');
362 Write_Info_Char (' ');
363 Write_Info_Name (Unit_Name (Unit_Num));
364 Write_Info_Tab (25);
365 Write_Info_Name (Unit_File_Name (Unit_Num));
366
367 Write_Info_Tab (49);
368 Write_Info_Str (Version_Get (Unit_Num));
369
370 -- Add BD parameter if Elaborate_Body pragma desirable
371
372 if Ekind (Uent) = E_Package
373 and then Elaborate_Body_Desirable (Uent)
374 then
375 Write_Info_Str (" BD");
376 end if;
377
378 -- Add BN parameter if body needed for SAL
379
380 if (Is_Subprogram (Uent)
381 or else Ekind (Uent) = E_Package
382 or else Is_Generic_Unit (Uent))
383 and then Body_Needed_For_SAL (Uent)
384 then
385 Write_Info_Str (" BN");
386 end if;
387
388 if Dynamic_Elab (Unit_Num) then
389 Write_Info_Str (" DE");
390 end if;
391
392 -- Set the Elaborate_Body indication if either an explicit pragma
393 -- was present, or if this is an instantiation.
394
395 if Has_Pragma_Elaborate_Body (Uent)
396 or else (Ukind = N_Package_Declaration
397 and then Is_Generic_Instance (Uent)
398 and then Present (Corresponding_Body (Unit (Unode))))
399 then
400 Write_Info_Str (" EB");
401 end if;
402
403 -- Now see if we should tell the binder that an elaboration entity
404 -- is present, which must be set to true during elaboration.
405 -- We generate the indication if the following condition is met:
406
407 -- If this is a spec ...
408
409 if (Is_Subprogram (Uent)
410 or else
411 Ekind (Uent) = E_Package
412 or else
413 Is_Generic_Unit (Uent))
414
415 -- and an elaboration entity was declared ...
416
417 and then Present (Elaboration_Entity (Uent))
418
419 -- and either the elaboration flag is required ...
420
421 and then
422 (Elaboration_Entity_Required (Uent)
423
424 -- or this unit has elaboration code ...
425
426 or else not Has_No_Elaboration_Code (Unode)
427
428 -- or this unit has a separate body and this
429 -- body has elaboration code.
430
431 or else
432 (Ekind (Uent) = E_Package
433 and then Present (Body_Entity (Uent))
434 and then
435 not Has_No_Elaboration_Code
436 (Parent
437 (Declaration_Node
438 (Body_Entity (Uent))))))
439 then
440 if Convention (Uent) = Convention_CIL then
441
442 -- Special case for generic CIL packages which never have
443 -- elaboration code
444
445 Write_Info_Str (" NE");
446
447 else
448 Write_Info_Str (" EE");
449 end if;
450 end if;
451
452 if Has_No_Elaboration_Code (Unode) then
453 Write_Info_Str (" NE");
454 end if;
455
456 Write_Info_Str (" O");
457 Write_Info_Char (OA_Setting (Unit_Num));
458
459 if Is_Preelaborated (Uent) then
460 Write_Info_Str (" PR");
461 end if;
462
463 if Is_Pure (Uent) then
464 Write_Info_Str (" PU");
465 end if;
466
467 if Has_RACW (Unit_Num) then
468 Write_Info_Str (" RA");
469 end if;
470
471 if Is_Remote_Call_Interface (Uent) then
472 Write_Info_Str (" RC");
473 end if;
474
475 if Is_Remote_Types (Uent) then
476 Write_Info_Str (" RT");
477 end if;
478
479 if Is_Shared_Passive (Uent) then
480 Write_Info_Str (" SP");
481 end if;
482
483 if Ukind = N_Subprogram_Declaration
484 or else Ukind = N_Subprogram_Body
485 then
486 Write_Info_Str (" SU");
487
488 elsif Ukind = N_Package_Declaration
489 or else
490 Ukind = N_Package_Body
491 then
492 -- If this is a wrapper package for a subprogram instantiation,
493 -- the user view is the subprogram. Note that in this case the
494 -- ali file contains both the spec and body of the instance.
495
496 if Is_Wrapper_Package (Uent) then
497 Write_Info_Str (" SU");
498 else
499 Write_Info_Str (" PK");
500 end if;
501
502 elsif Ukind = N_Generic_Package_Declaration then
503 Write_Info_Str (" PK");
504
505 end if;
506
507 if Ukind in N_Generic_Declaration
508 or else
509 (Present (Library_Unit (Unode))
510 and then
511 Nkind (Unit (Library_Unit (Unode))) in N_Generic_Declaration)
512 then
513 Write_Info_Str (" GE");
514 end if;
515
516 if not Is_Internal_File_Name (Unit_File_Name (Unit_Num), True) then
517 case Identifier_Casing (Source_Index (Unit_Num)) is
518 when All_Lower_Case => Write_Info_Str (" IL");
519 when All_Upper_Case => Write_Info_Str (" IU");
520 when others => null;
521 end case;
522
523 case Keyword_Casing (Source_Index (Unit_Num)) is
524 when Mixed_Case => Write_Info_Str (" KM");
525 when All_Upper_Case => Write_Info_Str (" KU");
526 when others => null;
527 end case;
528 end if;
529
530 if Initialize_Scalars or else Invalid_Value_Used then
531 Write_Info_Str (" IS");
532 end if;
533
534 Write_Info_EOL;
535
536 -- Generate with lines, first those that are directly with'ed
537
538 for J in With_Flags'Range loop
539 With_Flags (J) := False;
540 Elab_Flags (J) := False;
541 Elab_All_Flags (J) := False;
542 Elab_Des_Flags (J) := False;
543 Elab_All_Des_Flags (J) := False;
544 end loop;
545
546 Collect_Withs (Unode);
547
548 -- For a body, we must also check for any subunits which belong to
549 -- it and which have context clauses of their own, since these
550 -- with'ed units are part of its own elaboration dependencies.
551
552 if Nkind (Unit (Unode)) in N_Unit_Body then
553 for S in Units.First .. Last_Unit loop
554
555 -- We are only interested in subunits.
556 -- For preproc. data and def. files, Cunit is Empty, so
557 -- we need to test that first.
558
559 if Cunit (S) /= Empty
560 and then Nkind (Unit (Cunit (S))) = N_Subunit
561 then
562 Pnode := Library_Unit (Cunit (S));
563
564 -- In gnatc mode, the errors in the subunits will not
565 -- have been recorded, but the analysis of the subunit
566 -- may have failed. There is no information to add to
567 -- ALI file in this case.
568
569 if No (Pnode) then
570 exit;
571 end if;
572
573 -- Find ultimate parent of the subunit
574
575 while Nkind (Unit (Pnode)) = N_Subunit loop
576 Pnode := Library_Unit (Pnode);
577 end loop;
578
579 -- See if it belongs to current unit, and if so, include
580 -- its with_clauses.
581
582 if Pnode = Unode then
583 Collect_Withs (Cunit (S));
584 end if;
585 end if;
586 end loop;
587 end if;
588
589 Write_With_Lines;
590
591 -- Output linker option lines
592
593 for J in 1 .. Linker_Option_Lines.Last loop
594 declare
595 S : constant Linker_Option_Entry :=
596 Linker_Option_Lines.Table (J);
597 C : Character;
598
599 begin
600 if S.Unit = Unit_Num then
601 Write_Info_Initiate ('L');
602 Write_Info_Str (" """);
603
604 for J in 1 .. String_Length (S.Option) loop
605 C := Get_Character (Get_String_Char (S.Option, J));
606
607 if C in Character'Val (16#20#) .. Character'Val (16#7E#)
608 and then C /= '{'
609 then
610 Write_Info_Char (C);
611
612 if C = '"' then
613 Write_Info_Char (C);
614 end if;
615
616 else
617 declare
618 Hex : constant array (0 .. 15) of Character :=
619 "0123456789ABCDEF";
620
621 begin
622 Write_Info_Char ('{');
623 Write_Info_Char (Hex (Character'Pos (C) / 16));
624 Write_Info_Char (Hex (Character'Pos (C) mod 16));
625 Write_Info_Char ('}');
626 end;
627 end if;
628 end loop;
629
630 Write_Info_Char ('"');
631 Write_Info_EOL;
632 end if;
633 end;
634 end loop;
635 end Write_Unit_Information;
636
637 ----------------------
638 -- Write_With_Lines --
639 ----------------------
640
641 procedure Write_With_Lines is
642 With_Table : Unit_Ref_Table (1 .. Pos (Last_Unit - Units.First + 1));
643 Num_Withs : Int := 0;
644 Unum : Unit_Number_Type;
645 Cunit : Node_Id;
646 Uname : Unit_Name_Type;
647 Fname : File_Name_Type;
648 Pname : constant Unit_Name_Type :=
649 Get_Parent_Spec_Name (Unit_Name (Main_Unit));
650 Body_Fname : File_Name_Type;
651 Body_Index : Nat;
652
653 procedure Write_With_File_Names
654 (Nam : in out File_Name_Type;
655 Idx : Nat);
656 -- Write source file name Nam and ALI file name for unit index Idx.
657 -- Possibly change Nam to lowercase (generating a new file name).
658
659 --------------------------
660 -- Write_With_File_Name --
661 --------------------------
662
663 procedure Write_With_File_Names
664 (Nam : in out File_Name_Type;
665 Idx : Nat)
666 is
667 begin
668 if not File_Names_Case_Sensitive then
669 Get_Name_String (Nam);
670 To_Lower (Name_Buffer (1 .. Name_Len));
671 Nam := Name_Find;
672 end if;
673
674 Write_Info_Name (Nam);
675 Write_Info_Tab (49);
676 Write_Info_Name (Lib_File_Name (Nam, Idx));
677 end Write_With_File_Names;
678
679 -- Start of processing for Write_With_Lines
680
681 begin
682 -- Loop to build the with table. A with on the main unit itself
683 -- is ignored (AARM 10.2(14a)). Such a with-clause can occur if
684 -- the main unit is a subprogram with no spec, and a subunit of
685 -- it unnecessarily withs the parent.
686
687 for J in Units.First + 1 .. Last_Unit loop
688
689 -- Add element to with table if it is with'ed or if it is the
690 -- parent spec of the main unit (case of main unit is a child
691 -- unit). The latter with is not needed for semantic purposes,
692 -- but is required by the binder for elaboration purposes.
693 -- For preproc. data and def. files, there is no Unit_Name,
694 -- check for that first.
695
696 if Unit_Name (J) /= No_Unit_Name
697 and then (With_Flags (J) or else Unit_Name (J) = Pname)
698 then
699 Num_Withs := Num_Withs + 1;
700 With_Table (Num_Withs) := J;
701 end if;
702 end loop;
703
704 -- Sort and output the table
705
706 Sort (With_Table (1 .. Num_Withs));
707
708 for J in 1 .. Num_Withs loop
709 Unum := With_Table (J);
710 Cunit := Units.Table (Unum).Cunit;
711 Uname := Units.Table (Unum).Unit_Name;
712 Fname := Units.Table (Unum).Unit_File_Name;
713
714 if Ekind (Cunit_Entity (Unum)) = E_Package
715 and then From_With_Type (Cunit_Entity (Unum))
716 then
717 Write_Info_Initiate ('Y');
718 else
719 Write_Info_Initiate ('W');
720 end if;
721
722 Write_Info_Char (' ');
723 Write_Info_Name (Uname);
724
725 -- Now we need to figure out the names of the files that contain
726 -- the with'ed unit. These will usually be the files for the body,
727 -- except in the case of a package that has no body. Note that we
728 -- have a specific exemption here for predefined library generics
729 -- (see comments for Generic_May_Lack_ALI). We do not generate
730 -- dependency upon the ALI file for such units. Older compilers
731 -- used to not support generating code (and ALI) for generics, and
732 -- we want to avoid having different processing (namely, different
733 -- lists of files to be compiled) for different stages of the
734 -- bootstrap.
735
736 if not ((Nkind (Unit (Cunit)) in N_Generic_Declaration
737 or else
738 Nkind (Unit (Cunit)) in N_Generic_Renaming_Declaration)
739 and then Generic_May_Lack_ALI (Fname))
740 then
741 Write_Info_Tab (25);
742
743 if Is_Spec_Name (Uname) then
744 Body_Fname :=
745 Get_File_Name
746 (Get_Body_Name (Uname),
747 Subunit => False, May_Fail => True);
748
749 Body_Index :=
750 Get_Unit_Index
751 (Get_Body_Name (Uname));
752
753 if Body_Fname = No_File then
754 Body_Fname := Get_File_Name (Uname, Subunit => False);
755 Body_Index := Get_Unit_Index (Uname);
756 end if;
757
758 else
759 Body_Fname := Get_File_Name (Uname, Subunit => False);
760 Body_Index := Get_Unit_Index (Uname);
761 end if;
762
763 -- A package is considered to have a body if it requires
764 -- a body or if a body is present in Ada 83 mode.
765
766 if Body_Required (Cunit)
767 or else (Ada_Version = Ada_83
768 and then Full_Source_Name (Body_Fname) /= No_File)
769 then
770 Write_With_File_Names (Body_Fname, Body_Index);
771 else
772 Write_With_File_Names (Fname, Munit_Index (Unum));
773 end if;
774
775 if Ekind (Cunit_Entity (Unum)) = E_Package
776 and then From_With_Type (Cunit_Entity (Unum))
777 then
778 null;
779 else
780 if Elab_Flags (Unum) then
781 Write_Info_Str (" E");
782 end if;
783
784 if Elab_All_Flags (Unum) then
785 Write_Info_Str (" EA");
786 end if;
787
788 if Elab_Des_Flags (Unum) then
789 Write_Info_Str (" ED");
790 end if;
791
792 if Elab_All_Des_Flags (Unum) then
793 Write_Info_Str (" AD");
794 end if;
795 end if;
796 end if;
797
798 Write_Info_EOL;
799 end loop;
800 end Write_With_Lines;
801
802 -- Start of processing for Write_ALI
803
804 begin
805 -- We never write an ALI file if the original operating mode was
806 -- syntax-only (-gnats switch used in compiler invocation line)
807
808 if Original_Operating_Mode = Check_Syntax
809 or flag_compare_debug /= 0
810 then
811 return;
812 end if;
813
814 -- Build sorted source dependency table. We do this right away,
815 -- because it is referenced by Up_To_Date_ALI_File_Exists.
816
817 for Unum in Units.First .. Last_Unit loop
818 if Cunit_Entity (Unum) = Empty
819 or else not From_With_Type (Cunit_Entity (Unum))
820 then
821 Num_Sdep := Num_Sdep + 1;
822 Sdep_Table (Num_Sdep) := Unum;
823 end if;
824 end loop;
825
826 -- Sort the table so that the D lines are in order
827
828 Lib.Sort (Sdep_Table (1 .. Num_Sdep));
829
830 -- If we are not generating code, and there is an up to date
831 -- ali file accessible, read it, and acquire the compilation
832 -- arguments from this file.
833
834 if Operating_Mode /= Generate_Code then
835 if Up_To_Date_ALI_File_Exists then
836 Update_Tables_From_ALI_File;
837 return;
838 end if;
839 end if;
840
841 -- Otherwise acquire compilation arguments and prepare to write
842 -- out a new ali file.
843
844 Create_Output_Library_Info;
845
846 -- Output version line
847
848 Write_Info_Initiate ('V');
849 Write_Info_Str (" """);
850 Write_Info_Str (Verbose_Library_Version);
851 Write_Info_Char ('"');
852
853 Write_Info_EOL;
854
855 -- Output main program line if this is acceptable main program
856
857 Output_Main_Program_Line : declare
858 U : Node_Id := Unit (Units.Table (Main_Unit).Cunit);
859 S : Node_Id;
860
861 procedure M_Parameters;
862 -- Output parameters for main program line
863
864 ------------------
865 -- M_Parameters --
866 ------------------
867
868 procedure M_Parameters is
869 begin
870 if Main_Priority (Main_Unit) /= Default_Main_Priority then
871 Write_Info_Char (' ');
872 Write_Info_Nat (Main_Priority (Main_Unit));
873 end if;
874
875 if Opt.Time_Slice_Set then
876 Write_Info_Str (" T=");
877 Write_Info_Nat (Opt.Time_Slice_Value);
878 end if;
879
880 Write_Info_Str (" W=");
881 Write_Info_Char
882 (WC_Encoding_Letters (Wide_Character_Encoding_Method));
883
884 Write_Info_EOL;
885 end M_Parameters;
886
887 -- Start of processing for Output_Main_Program_Line
888
889 begin
890 if Nkind (U) = N_Subprogram_Body
891 or else
892 (Nkind (U) = N_Package_Body
893 and then
894 Nkind (Original_Node (U)) in N_Subprogram_Instantiation)
895 then
896 -- If the unit is a subprogram instance, the entity for the
897 -- subprogram is the alias of the visible entity, which is the
898 -- related instance of the wrapper package. We retrieve the
899 -- subprogram declaration of the desired entity.
900
901 if Nkind (U) = N_Package_Body then
902 U := Parent (Parent (
903 Alias (Related_Instance (Defining_Unit_Name
904 (Specification (Unit (Library_Unit (Parent (U)))))))));
905 end if;
906
907 S := Specification (U);
908
909 if No (Parameter_Specifications (S)) then
910 if Nkind (S) = N_Procedure_Specification then
911 Write_Info_Initiate ('M');
912 Write_Info_Str (" P");
913 M_Parameters;
914
915 else
916 declare
917 Nam : Node_Id := Defining_Unit_Name (S);
918
919 begin
920 -- If it is a child unit, get its simple name
921
922 if Nkind (Nam) = N_Defining_Program_Unit_Name then
923 Nam := Defining_Identifier (Nam);
924 end if;
925
926 if Is_Integer_Type (Etype (Nam)) then
927 Write_Info_Initiate ('M');
928 Write_Info_Str (" F");
929 M_Parameters;
930 end if;
931 end;
932 end if;
933 end if;
934 end if;
935 end Output_Main_Program_Line;
936
937 -- Write command argument ('A') lines
938
939 for A in 1 .. Compilation_Switches.Last loop
940 Write_Info_Initiate ('A');
941 Write_Info_Char (' ');
942 Write_Info_Str (Compilation_Switches.Table (A).all);
943 Write_Info_Terminate;
944 end loop;
945
946 -- Output parameters ('P') line
947
948 Write_Info_Initiate ('P');
949
950 if Compilation_Errors then
951 Write_Info_Str (" CE");
952 end if;
953
954 if Opt.Detect_Blocking then
955 Write_Info_Str (" DB");
956 end if;
957
958 if Opt.Float_Format /= ' ' then
959 Write_Info_Str (" F");
960
961 if Opt.Float_Format = 'I' then
962 Write_Info_Char ('I');
963
964 elsif Opt.Float_Format_Long = 'D' then
965 Write_Info_Char ('D');
966
967 else
968 Write_Info_Char ('G');
969 end if;
970 end if;
971
972 if Tasking_Used
973 and then not Is_Predefined_File_Name (Unit_File_Name (Main_Unit))
974 then
975 if Locking_Policy /= ' ' then
976 Write_Info_Str (" L");
977 Write_Info_Char (Locking_Policy);
978 end if;
979
980 if Queuing_Policy /= ' ' then
981 Write_Info_Str (" Q");
982 Write_Info_Char (Queuing_Policy);
983 end if;
984
985 if Task_Dispatching_Policy /= ' ' then
986 Write_Info_Str (" T");
987 Write_Info_Char (Task_Dispatching_Policy);
988 Write_Info_Char (' ');
989 end if;
990 end if;
991
992 if not Object then
993 Write_Info_Str (" NO");
994 end if;
995
996 if No_Run_Time_Mode then
997 Write_Info_Str (" NR");
998 end if;
999
1000 if Normalize_Scalars then
1001 Write_Info_Str (" NS");
1002 end if;
1003
1004 if Sec_Stack_Used then
1005 Write_Info_Str (" SS");
1006 end if;
1007
1008 if Unreserve_All_Interrupts then
1009 Write_Info_Str (" UA");
1010 end if;
1011
1012 if Exception_Mechanism = Back_End_Exceptions then
1013 Write_Info_Str (" ZX");
1014 end if;
1015
1016 Write_Info_EOL;
1017
1018 -- Before outputting the restrictions line, update the setting of
1019 -- the No_Elaboration_Code flag. Violations of this restriction
1020 -- cannot be detected until after the backend has been called since
1021 -- it is the backend that sets this flag. We have to check all units
1022 -- for which we have generated code
1023
1024 for Unit in Units.First .. Last_Unit loop
1025 if Units.Table (Unit).Generate_Code
1026 or else Unit = Main_Unit
1027 then
1028 if not Has_No_Elaboration_Code (Cunit (Unit)) then
1029 Main_Restrictions.Violated (No_Elaboration_Code) := True;
1030 end if;
1031 end if;
1032 end loop;
1033
1034 -- Output first restrictions line
1035
1036 Write_Info_Initiate ('R');
1037 Write_Info_Char (' ');
1038
1039 -- First the information for the boolean restrictions
1040
1041 for R in All_Boolean_Restrictions loop
1042 if Main_Restrictions.Set (R)
1043 and then not Restriction_Warnings (R)
1044 then
1045 Write_Info_Char ('r');
1046 elsif Main_Restrictions.Violated (R) then
1047 Write_Info_Char ('v');
1048 else
1049 Write_Info_Char ('n');
1050 end if;
1051 end loop;
1052
1053 -- And now the information for the parameter restrictions
1054
1055 for RP in All_Parameter_Restrictions loop
1056 if Main_Restrictions.Set (RP)
1057 and then not Restriction_Warnings (RP)
1058 then
1059 Write_Info_Char ('r');
1060 Write_Info_Nat (Nat (Main_Restrictions.Value (RP)));
1061 else
1062 Write_Info_Char ('n');
1063 end if;
1064
1065 if not Main_Restrictions.Violated (RP)
1066 or else RP not in Checked_Parameter_Restrictions
1067 then
1068 Write_Info_Char ('n');
1069 else
1070 Write_Info_Char ('v');
1071 Write_Info_Nat (Nat (Main_Restrictions.Count (RP)));
1072
1073 if Main_Restrictions.Unknown (RP) then
1074 Write_Info_Char ('+');
1075 end if;
1076 end if;
1077 end loop;
1078
1079 Write_Info_EOL;
1080
1081 -- Output R lines for No_Dependence entries
1082
1083 for J in No_Dependence.First .. No_Dependence.Last loop
1084 if In_Extended_Main_Source_Unit (No_Dependence.Table (J).Unit)
1085 and then not No_Dependence.Table (J).Warn
1086 then
1087 Write_Info_Initiate ('R');
1088 Write_Info_Char (' ');
1089 Write_Unit_Name (No_Dependence.Table (J).Unit);
1090 Write_Info_EOL;
1091 end if;
1092 end loop;
1093
1094 -- Output interrupt state lines
1095
1096 for J in Interrupt_States.First .. Interrupt_States.Last loop
1097 Write_Info_Initiate ('I');
1098 Write_Info_Char (' ');
1099 Write_Info_Nat (Interrupt_States.Table (J).Interrupt_Number);
1100 Write_Info_Char (' ');
1101 Write_Info_Char (Interrupt_States.Table (J).Interrupt_State);
1102 Write_Info_Char (' ');
1103 Write_Info_Nat
1104 (Nat (Get_Logical_Line_Number
1105 (Interrupt_States.Table (J).Pragma_Loc)));
1106 Write_Info_EOL;
1107 end loop;
1108
1109 -- Output priority specific dispatching lines
1110
1111 for J in Specific_Dispatching.First .. Specific_Dispatching.Last loop
1112 Write_Info_Initiate ('S');
1113 Write_Info_Char (' ');
1114 Write_Info_Char (Specific_Dispatching.Table (J).Dispatching_Policy);
1115 Write_Info_Char (' ');
1116 Write_Info_Nat (Specific_Dispatching.Table (J).First_Priority);
1117 Write_Info_Char (' ');
1118 Write_Info_Nat (Specific_Dispatching.Table (J).Last_Priority);
1119 Write_Info_Char (' ');
1120 Write_Info_Nat
1121 (Nat (Get_Logical_Line_Number
1122 (Specific_Dispatching.Table (J).Pragma_Loc)));
1123 Write_Info_EOL;
1124 end loop;
1125
1126 -- Loop through file table to output information for all units for which
1127 -- we have generated code, as marked by the Generate_Code flag.
1128
1129 for Unit in Units.First .. Last_Unit loop
1130 if Units.Table (Unit).Generate_Code
1131 or else Unit = Main_Unit
1132 then
1133 Write_Info_EOL; -- blank line
1134 Write_Unit_Information (Unit);
1135 end if;
1136 end loop;
1137
1138 Write_Info_EOL; -- blank line
1139
1140 -- Output external version reference lines
1141
1142 for J in 1 .. Version_Ref.Last loop
1143 Write_Info_Initiate ('E');
1144 Write_Info_Char (' ');
1145
1146 for K in 1 .. String_Length (Version_Ref.Table (J)) loop
1147 Write_Info_Char_Code (Get_String_Char (Version_Ref.Table (J), K));
1148 end loop;
1149
1150 Write_Info_EOL;
1151 end loop;
1152
1153 -- Prepare to output the source dependency lines
1154
1155 declare
1156 Unum : Unit_Number_Type;
1157 -- Number of unit being output
1158
1159 Sind : Source_File_Index;
1160 -- Index of corresponding source file
1161
1162 Fname : File_Name_Type;
1163
1164 begin
1165 for J in 1 .. Num_Sdep loop
1166 Unum := Sdep_Table (J);
1167 Units.Table (Unum).Dependency_Num := J;
1168 Sind := Units.Table (Unum).Source_Index;
1169
1170 Write_Info_Initiate ('D');
1171 Write_Info_Char (' ');
1172
1173 -- Normal case of a unit entry with a source index
1174
1175 if Sind /= No_Source_File then
1176 Fname := File_Name (Sind);
1177
1178 -- Ensure that on platforms where the file names are not
1179 -- case sensitive, the recorded file name is in lower case.
1180
1181 if not File_Names_Case_Sensitive then
1182 Get_Name_String (Fname);
1183 To_Lower (Name_Buffer (1 .. Name_Len));
1184 Fname := Name_Find;
1185 end if;
1186
1187 Write_Info_Name (Fname);
1188 Write_Info_Tab (25);
1189 Write_Info_Str (String (Time_Stamp (Sind)));
1190 Write_Info_Char (' ');
1191 Write_Info_Str (Get_Hex_String (Source_Checksum (Sind)));
1192
1193 -- If subunit, add unit name, omitting the %b at the end
1194
1195 if Present (Cunit (Unum))
1196 and then Nkind (Unit (Cunit (Unum))) = N_Subunit
1197 then
1198 Get_Decoded_Name_String (Unit_Name (Unum));
1199 Write_Info_Char (' ');
1200 Write_Info_Str (Name_Buffer (1 .. Name_Len - 2));
1201 end if;
1202
1203 -- If Source_Reference pragma used output information
1204
1205 if Num_SRef_Pragmas (Sind) > 0 then
1206 Write_Info_Char (' ');
1207
1208 if Num_SRef_Pragmas (Sind) = 1 then
1209 Write_Info_Nat (Int (First_Mapped_Line (Sind)));
1210 else
1211 Write_Info_Nat (0);
1212 end if;
1213
1214 Write_Info_Char (':');
1215 Write_Info_Name (Reference_Name (Sind));
1216 end if;
1217
1218 -- Case where there is no source index (happens for missing
1219 -- files). In this case we write a dummy time stamp.
1220
1221 else
1222 Write_Info_Name (Unit_File_Name (Unum));
1223 Write_Info_Tab (25);
1224 Write_Info_Str (String (Dummy_Time_Stamp));
1225 Write_Info_Char (' ');
1226 Write_Info_Str (Get_Hex_String (0));
1227 end if;
1228
1229 Write_Info_EOL;
1230 end loop;
1231 end;
1232
1233 -- Output cross-references
1234
1235 Output_References;
1236
1237 -- Output SCO information if present
1238
1239 if Generate_SCO then
1240 SCO_Output;
1241 end if;
1242
1243 -- Output final blank line and we are done. This final blank line is
1244 -- probably junk, but we don't feel like making an incompatible change!
1245
1246 Write_Info_Terminate;
1247 Close_Output_Library_Info;
1248 end Write_ALI;
1249
1250 ---------------------
1251 -- Write_Unit_Name --
1252 ---------------------
1253
1254 procedure Write_Unit_Name (N : Node_Id) is
1255 begin
1256 if Nkind (N) = N_Identifier then
1257 Write_Info_Name (Chars (N));
1258
1259 else
1260 pragma Assert (Nkind (N) = N_Selected_Component);
1261 Write_Unit_Name (Prefix (N));
1262 Write_Info_Char ('.');
1263 Write_Unit_Name (Selector_Name (N));
1264 end if;
1265 end Write_Unit_Name;
1266
1267 end Lib.Writ;
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