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2008-05-30 Vladimir Makarov <vmakarov@redhat.com>
[official-gcc.git] / gcc / ada / lib-writ.adb
blob7ebfc7d3d5148b016ac484014b759db9b1ac33f0
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) 1992-2008, 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 Restrict; use Restrict;
42 with Rident; use Rident;
43 with Scn; use Scn;
44 with Sinfo; use Sinfo;
45 with Sinput; use Sinput;
46 with Snames; use Snames;
47 with Stringt; use Stringt;
48 with Tbuild; use Tbuild;
49 with Uname; use Uname;
50
51 with System.Case_Util; use System.Case_Util;
52 with System.WCh_Con; use System.WCh_Con;
53
54 package body Lib.Writ is
55
56 -----------------------
57 -- Local Subprograms --
58 -----------------------
59
60 procedure Write_Unit_Name (N : Node_Id);
61 -- Used to write out the unit name for R (pragma Restriction) lines
62 -- for uses of Restriction (No_Dependence => unit-name).
63
64 ----------------------------------
65 -- Add_Preprocessing_Dependency --
66 ----------------------------------
67
68 procedure Add_Preprocessing_Dependency (S : Source_File_Index) is
69 begin
70 Units.Increment_Last;
71 Units.Table (Units.Last) :=
72 (Unit_File_Name => File_Name (S),
73 Unit_Name => No_Unit_Name,
74 Expected_Unit => No_Unit_Name,
75 Source_Index => S,
76 Cunit => Empty,
77 Cunit_Entity => Empty,
78 Dependency_Num => 0,
79 Dynamic_Elab => False,
80 Fatal_Error => False,
81 Generate_Code => False,
82 Has_RACW => False,
83 Is_Compiler_Unit => False,
84 Ident_String => Empty,
85 Loading => False,
86 Main_Priority => -1,
87 Munit_Index => 0,
88 Serial_Number => 0,
89 Version => 0,
90 Error_Location => No_Location,
91 OA_Setting => 'O');
92 end Add_Preprocessing_Dependency;
93
94 ------------------------------
95 -- Ensure_System_Dependency --
96 ------------------------------
97
98 procedure Ensure_System_Dependency is
99 System_Uname : Unit_Name_Type;
100 -- Unit name for system spec if needed for dummy entry
101
102 System_Fname : File_Name_Type;
103 -- File name for system spec if needed for dummy entry
104
105 begin
106 -- Nothing to do if we already compiled System
107
108 for Unum in Units.First .. Last_Unit loop
109 if Units.Table (Unum).Source_Index = System_Source_File_Index then
110 return;
111 end if;
112 end loop;
113
114 -- If no entry for system.ads in the units table, then add a entry
115 -- to the units table for system.ads, which will be referenced when
116 -- the ali file is generated. We need this because every unit depends
117 -- on system as a result of Targparm scanning the system.ads file to
118 -- determine the target dependent parameters for the compilation.
119
120 Name_Len := 6;
121 Name_Buffer (1 .. 6) := "system";
122 System_Uname := Name_To_Unit_Name (Name_Enter);
123 System_Fname := File_Name (System_Source_File_Index);
124
125 Units.Increment_Last;
126 Units.Table (Units.Last) := (
127 Unit_File_Name => System_Fname,
128 Unit_Name => System_Uname,
129 Expected_Unit => System_Uname,
130 Source_Index => System_Source_File_Index,
131 Cunit => Empty,
132 Cunit_Entity => Empty,
133 Dependency_Num => 0,
134 Dynamic_Elab => False,
135 Fatal_Error => False,
136 Generate_Code => False,
137 Has_RACW => False,
138 Is_Compiler_Unit => False,
139 Ident_String => Empty,
140 Loading => False,
141 Main_Priority => -1,
142 Munit_Index => 0,
143 Serial_Number => 0,
144 Version => 0,
145 Error_Location => No_Location,
146 OA_Setting => 'O');
147
148 -- Parse system.ads so that the checksum is set right
149 -- Style checks are not applied.
150
151 declare
152 Save_Mindex : constant Nat := Multiple_Unit_Index;
153 Save_Style : constant Boolean := Style_Check;
154 begin
155 Multiple_Unit_Index := 0;
156 Style_Check := False;
157 Initialize_Scanner (Units.Last, System_Source_File_Index);
158 Discard_List (Par (Configuration_Pragmas => False));
159 Style_Check := Save_Style;
160 Multiple_Unit_Index := Save_Mindex;
161 end;
162 end Ensure_System_Dependency;
163
164 ---------------
165 -- Write_ALI --
166 ---------------
167
168 procedure Write_ALI (Object : Boolean) is
169
170 ----------------
171 -- Local Data --
172 ----------------
173
174 Last_Unit : constant Unit_Number_Type := Units.Last;
175 -- Record unit number of last unit. We capture this in case we
176 -- have to add a dummy entry to the unit table for package System.
177
178 With_Flags : array (Units.First .. Last_Unit) of Boolean;
179 -- Array of flags to show which units are with'ed
180
181 Elab_Flags : array (Units.First .. Last_Unit) of Boolean;
182 -- Array of flags to show which units have pragma Elaborate set
183
184 Elab_All_Flags : array (Units.First .. Last_Unit) of Boolean;
185 -- Array of flags to show which units have pragma Elaborate All set
186
187 Elab_Des_Flags : array (Units.First .. Last_Unit) of Boolean;
188 -- Array of flags to show which units have Elaborate_Desirable set
189
190 Elab_All_Des_Flags : array (Units.First .. Last_Unit) of Boolean;
191 -- Array of flags to show which units have Elaborate_All_Desirable set
192
193 Sdep_Table : Unit_Ref_Table (1 .. Pos (Last_Unit - Units.First + 2));
194 -- Sorted table of source dependencies. One extra entry in case we
195 -- have to add a dummy entry for System.
196
197 Num_Sdep : Nat := 0;
198 -- Number of active entries in Sdep_Table
199
200 -----------------------
201 -- Local Subprograms --
202 -----------------------
203
204 procedure Collect_Withs (Cunit : Node_Id);
205 -- Collect with lines for entries in the context clause of the
206 -- given compilation unit, Cunit.
207
208 procedure Update_Tables_From_ALI_File;
209 -- Given an up to date ALI file (see Up_To_Date_ALI_file_Exists
210 -- function), update tables from the ALI information, including
211 -- specifically the Compilation_Switches table.
212
213 function Up_To_Date_ALI_File_Exists return Boolean;
214 -- If there exists an ALI file that is up to date, then this function
215 -- initializes the tables in the ALI spec to contain information on
216 -- this file (using Scan_ALI) and returns True. If no file exists,
217 -- or the file is not up to date, then False is returned.
218
219 procedure Write_Unit_Information (Unit_Num : Unit_Number_Type);
220 -- Write out the library information for one unit for which code is
221 -- generated (includes unit line and with lines).
222
223 procedure Write_With_Lines;
224 -- Write out with lines collected by calls to Collect_Withs
225
226 -------------------
227 -- Collect_Withs --
228 -------------------
229
230 procedure Collect_Withs (Cunit : Node_Id) is
231 Item : Node_Id;
232 Unum : Unit_Number_Type;
233
234 begin
235 Item := First (Context_Items (Cunit));
236 while Present (Item) loop
237
238 -- Process with clause
239
240 -- Ada 2005 (AI-50217): limited with_clauses do not create
241 -- dependencies, but must be recorded as components of the
242 -- partition, in case there is no regular with_clause for
243 -- the unit anywhere else.
244
245 if Nkind (Item) = N_With_Clause then
246 Unum := Get_Cunit_Unit_Number (Library_Unit (Item));
247 With_Flags (Unum) := True;
248
249 if not Limited_Present (Item) then
250 if Elaborate_Present (Item) then
251 Elab_Flags (Unum) := True;
252 end if;
253
254 if Elaborate_All_Present (Item) then
255 Elab_All_Flags (Unum) := True;
256 end if;
257
258 if Elaborate_All_Desirable (Item) then
259 Elab_All_Des_Flags (Unum) := True;
260 end if;
261
262 if Elaborate_Desirable (Item) then
263 Elab_Des_Flags (Unum) := True;
264 end if;
265
266 else
267 Set_From_With_Type (Cunit_Entity (Unum));
268 end if;
269 end if;
270
271 Next (Item);
272 end loop;
273 end Collect_Withs;
274
275 --------------------------------
276 -- Up_To_Date_ALI_File_Exists --
277 --------------------------------
278
279 function Up_To_Date_ALI_File_Exists return Boolean is
280 Name : File_Name_Type;
281 Text : Text_Buffer_Ptr;
282 Id : Sdep_Id;
283 Sind : Source_File_Index;
284
285 begin
286 Opt.Check_Object_Consistency := True;
287 Read_Library_Info (Name, Text);
288
289 -- Return if we could not find an ALI file
290
291 if Text = null then
292 return False;
293 end if;
294
295 -- Return if ALI file has bad format
296
297 Initialize_ALI;
298
299 if Scan_ALI (Name, Text, False, Err => True) = No_ALI_Id then
300 return False;
301 end if;
302
303 -- If we have an OK ALI file, check if it is up to date
304 -- Note that we assume that the ALI read has all the entries
305 -- we have in our table, plus some additional ones (that can
306 -- come from expansion).
307
308 Id := First_Sdep_Entry;
309 for J in 1 .. Num_Sdep loop
310 Sind := Units.Table (Sdep_Table (J)).Source_Index;
311
312 while Sdep.Table (Id).Sfile /= File_Name (Sind) loop
313 if Id = Sdep.Last then
314 return False;
315 else
316 Id := Id + 1;
317 end if;
318 end loop;
319
320 if Sdep.Table (Id).Stamp /= Time_Stamp (Sind) then
321 return False;
322 end if;
323 end loop;
324
325 return True;
326 end Up_To_Date_ALI_File_Exists;
327
328 ---------------------------------
329 -- Update_Tables_From_ALI_File --
330 ---------------------------------
331
332 procedure Update_Tables_From_ALI_File is
333 begin
334 -- Build Compilation_Switches table
335
336 Compilation_Switches.Init;
337
338 for J in First_Arg_Entry .. Args.Last loop
339 Compilation_Switches.Increment_Last;
340 Compilation_Switches.Table (Compilation_Switches.Last) :=
341 Args.Table (J);
342 end loop;
343 end Update_Tables_From_ALI_File;
344
345 ----------------------------
346 -- Write_Unit_Information --
347 ----------------------------
348
349 procedure Write_Unit_Information (Unit_Num : Unit_Number_Type) is
350 Unode : constant Node_Id := Cunit (Unit_Num);
351 Ukind : constant Node_Kind := Nkind (Unit (Unode));
352 Uent : constant Entity_Id := Cunit_Entity (Unit_Num);
353 Pnode : Node_Id;
354
355 begin
356 Write_Info_Initiate ('U');
357 Write_Info_Char (' ');
358 Write_Info_Name (Unit_Name (Unit_Num));
359 Write_Info_Tab (25);
360 Write_Info_Name (Unit_File_Name (Unit_Num));
361
362 Write_Info_Tab (49);
363 Write_Info_Str (Version_Get (Unit_Num));
364
365 -- Add BD parameter if Elaborate_Body pragma desirable
366
367 if Ekind (Uent) = E_Package
368 and then Elaborate_Body_Desirable (Uent)
369 then
370 Write_Info_Str (" BD");
371 end if;
372
373 -- Add BN parameter if body needed for SAL
374
375 if (Is_Subprogram (Uent)
376 or else Ekind (Uent) = E_Package
377 or else Is_Generic_Unit (Uent))
378 and then Body_Needed_For_SAL (Uent)
379 then
380 Write_Info_Str (" BN");
381 end if;
382
383 if Dynamic_Elab (Unit_Num) then
384 Write_Info_Str (" DE");
385 end if;
386
387 -- Set the Elaborate_Body indication if either an explicit pragma
388 -- was present, or if this is an instantiation.
389
390 if Has_Pragma_Elaborate_Body (Uent)
391 or else (Ukind = N_Package_Declaration
392 and then Is_Generic_Instance (Uent)
393 and then Present (Corresponding_Body (Unit (Unode))))
394 then
395 Write_Info_Str (" EB");
396 end if;
397
398 -- Now see if we should tell the binder that an elaboration entity
399 -- is present, which must be set to true during elaboration.
400 -- We generate the indication if the following condition is met:
401
402 -- If this is a spec ...
403
404 if (Is_Subprogram (Uent)
405 or else
406 Ekind (Uent) = E_Package
407 or else
408 Is_Generic_Unit (Uent))
409
410 -- and an elaboration entity was declared ...
411
412 and then Present (Elaboration_Entity (Uent))
413
414 -- and either the elaboration flag is required ...
415
416 and then
417 (Elaboration_Entity_Required (Uent)
418
419 -- or this unit has elaboration code ...
420
421 or else not Has_No_Elaboration_Code (Unode)
422
423 -- or this unit has a separate body and this
424 -- body has elaboration code.
425
426 or else
427 (Ekind (Uent) = E_Package
428 and then Present (Body_Entity (Uent))
429 and then
430 not Has_No_Elaboration_Code
431 (Parent
432 (Declaration_Node
433 (Body_Entity (Uent))))))
434 then
435 if Convention (Uent) = Convention_CIL then
436
437 -- Special case for generic CIL packages which never have
438 -- elaboration code
439
440 Write_Info_Str (" NE");
441
442 else
443 Write_Info_Str (" EE");
444 end if;
445 end if;
446
447 if Has_No_Elaboration_Code (Unode) then
448 Write_Info_Str (" NE");
449 end if;
450
451 Write_Info_Str (" O");
452 Write_Info_Char (OA_Setting (Unit_Num));
453
454 if Is_Preelaborated (Uent) then
455 Write_Info_Str (" PR");
456 end if;
457
458 if Is_Pure (Uent) then
459 Write_Info_Str (" PU");
460 end if;
461
462 if Has_RACW (Unit_Num) then
463 Write_Info_Str (" RA");
464 end if;
465
466 if Is_Remote_Call_Interface (Uent) then
467 Write_Info_Str (" RC");
468 end if;
469
470 if Is_Remote_Types (Uent) then
471 Write_Info_Str (" RT");
472 end if;
473
474 if Is_Shared_Passive (Uent) then
475 Write_Info_Str (" SP");
476 end if;
477
478 if Ukind = N_Subprogram_Declaration
479 or else Ukind = N_Subprogram_Body
480 then
481 Write_Info_Str (" SU");
482
483 elsif Ukind = N_Package_Declaration
484 or else
485 Ukind = N_Package_Body
486 then
487 -- If this is a wrapper package for a subprogram instantiation,
488 -- the user view is the subprogram. Note that in this case the
489 -- ali file contains both the spec and body of the instance.
490
491 if Is_Wrapper_Package (Uent) then
492 Write_Info_Str (" SU");
493 else
494 Write_Info_Str (" PK");
495 end if;
496
497 elsif Ukind = N_Generic_Package_Declaration then
498 Write_Info_Str (" PK");
499
500 end if;
501
502 if Ukind in N_Generic_Declaration
503 or else
504 (Present (Library_Unit (Unode))
505 and then
506 Nkind (Unit (Library_Unit (Unode))) in N_Generic_Declaration)
507 then
508 Write_Info_Str (" GE");
509 end if;
510
511 if not Is_Internal_File_Name (Unit_File_Name (Unit_Num), True) then
512 case Identifier_Casing (Source_Index (Unit_Num)) is
513 when All_Lower_Case => Write_Info_Str (" IL");
514 when All_Upper_Case => Write_Info_Str (" IU");
515 when others => null;
516 end case;
517
518 case Keyword_Casing (Source_Index (Unit_Num)) is
519 when Mixed_Case => Write_Info_Str (" KM");
520 when All_Upper_Case => Write_Info_Str (" KU");
521 when others => null;
522 end case;
523 end if;
524
525 if Initialize_Scalars or else Invalid_Value_Used then
526 Write_Info_Str (" IS");
527 end if;
528
529 Write_Info_EOL;
530
531 -- Generate with lines, first those that are directly with'ed
532
533 for J in With_Flags'Range loop
534 With_Flags (J) := False;
535 Elab_Flags (J) := False;
536 Elab_All_Flags (J) := False;
537 Elab_Des_Flags (J) := False;
538 Elab_All_Des_Flags (J) := False;
539 end loop;
540
541 Collect_Withs (Unode);
542
543 -- For a body, we must also check for any subunits which belong to
544 -- it and which have context clauses of their own, since these
545 -- with'ed units are part of its own elaboration dependencies.
546
547 if Nkind (Unit (Unode)) in N_Unit_Body then
548 for S in Units.First .. Last_Unit loop
549
550 -- We are only interested in subunits.
551 -- For preproc. data and def. files, Cunit is Empty, so
552 -- we need to test that first.
553
554 if Cunit (S) /= Empty
555 and then Nkind (Unit (Cunit (S))) = N_Subunit
556 then
557 Pnode := Library_Unit (Cunit (S));
558
559 -- In gnatc mode, the errors in the subunits will not
560 -- have been recorded, but the analysis of the subunit
561 -- may have failed. There is no information to add to
562 -- ALI file in this case.
563
564 if No (Pnode) then
565 exit;
566 end if;
567
568 -- Find ultimate parent of the subunit
569
570 while Nkind (Unit (Pnode)) = N_Subunit loop
571 Pnode := Library_Unit (Pnode);
572 end loop;
573
574 -- See if it belongs to current unit, and if so, include
575 -- its with_clauses.
576
577 if Pnode = Unode then
578 Collect_Withs (Cunit (S));
579 end if;
580 end if;
581 end loop;
582 end if;
583
584 Write_With_Lines;
585
586 -- Output linker option lines
587
588 for J in 1 .. Linker_Option_Lines.Last loop
589 declare
590 S : constant Linker_Option_Entry :=
591 Linker_Option_Lines.Table (J);
592 C : Character;
593
594 begin
595 if S.Unit = Unit_Num then
596 Write_Info_Initiate ('L');
597 Write_Info_Str (" """);
598
599 for J in 1 .. String_Length (S.Option) loop
600 C := Get_Character (Get_String_Char (S.Option, J));
601
602 if C in Character'Val (16#20#) .. Character'Val (16#7E#)
603 and then C /= '{'
604 then
605 Write_Info_Char (C);
606
607 if C = '"' then
608 Write_Info_Char (C);
609 end if;
610
611 else
612 declare
613 Hex : constant array (0 .. 15) of Character :=
614 "0123456789ABCDEF";
615
616 begin
617 Write_Info_Char ('{');
618 Write_Info_Char (Hex (Character'Pos (C) / 16));
619 Write_Info_Char (Hex (Character'Pos (C) mod 16));
620 Write_Info_Char ('}');
621 end;
622 end if;
623 end loop;
624
625 Write_Info_Char ('"');
626 Write_Info_EOL;
627 end if;
628 end;
629 end loop;
630 end Write_Unit_Information;
631
632 ----------------------
633 -- Write_With_Lines --
634 ----------------------
635
636 procedure Write_With_Lines is
637 With_Table : Unit_Ref_Table (1 .. Pos (Last_Unit - Units.First + 1));
638 Num_Withs : Int := 0;
639 Unum : Unit_Number_Type;
640 Cunit : Node_Id;
641 Uname : Unit_Name_Type;
642 Fname : File_Name_Type;
643 Pname : constant Unit_Name_Type :=
644 Get_Parent_Spec_Name (Unit_Name (Main_Unit));
645 Body_Fname : File_Name_Type;
646 Body_Index : Nat;
647
648 procedure Write_With_File_Names
649 (Nam : in out File_Name_Type;
650 Idx : Nat);
651 -- Write source file name Nam and ALI file name for unit index Idx.
652 -- Possibly change Nam to lowercase (generating a new file name).
653
654 --------------------------
655 -- Write_With_File_Name --
656 --------------------------
657
658 procedure Write_With_File_Names
659 (Nam : in out File_Name_Type;
660 Idx : Nat)
661 is
662 begin
663 if not File_Names_Case_Sensitive then
664 Get_Name_String (Nam);
665 To_Lower (Name_Buffer (1 .. Name_Len));
666 Nam := Name_Find;
667 end if;
668
669 Write_Info_Name (Nam);
670 Write_Info_Tab (49);
671 Write_Info_Name (Lib_File_Name (Nam, Idx));
672 end Write_With_File_Names;
673
674 -- Start of processing for Write_With_Lines
675
676 begin
677 -- Loop to build the with table. A with on the main unit itself
678 -- is ignored (AARM 10.2(14a)). Such a with-clause can occur if
679 -- the main unit is a subprogram with no spec, and a subunit of
680 -- it unnecessarily withs the parent.
681
682 for J in Units.First + 1 .. Last_Unit loop
683
684 -- Add element to with table if it is with'ed or if it is the
685 -- parent spec of the main unit (case of main unit is a child
686 -- unit). The latter with is not needed for semantic purposes,
687 -- but is required by the binder for elaboration purposes.
688 -- For preproc. data and def. files, there is no Unit_Name,
689 -- check for that first.
690
691 if Unit_Name (J) /= No_Unit_Name
692 and then (With_Flags (J) or else Unit_Name (J) = Pname)
693 then
694 Num_Withs := Num_Withs + 1;
695 With_Table (Num_Withs) := J;
696 end if;
697 end loop;
698
699 -- Sort and output the table
700
701 Sort (With_Table (1 .. Num_Withs));
702
703 for J in 1 .. Num_Withs loop
704 Unum := With_Table (J);
705 Cunit := Units.Table (Unum).Cunit;
706 Uname := Units.Table (Unum).Unit_Name;
707 Fname := Units.Table (Unum).Unit_File_Name;
708
709 if Ekind (Cunit_Entity (Unum)) = E_Package
710 and then From_With_Type (Cunit_Entity (Unum))
711 then
712 Write_Info_Initiate ('Y');
713 else
714 Write_Info_Initiate ('W');
715 end if;
716
717 Write_Info_Char (' ');
718 Write_Info_Name (Uname);
719
720 -- Now we need to figure out the names of the files that contain
721 -- the with'ed unit. These will usually be the files for the body,
722 -- except in the case of a package that has no body. Note that we
723 -- have a specific exemption here for predefined library generics
724 -- (see comments for Generic_May_Lack_ALI). We do not generate
725 -- dependency upon the ALI file for such units. Older compilers
726 -- used to not support generating code (and ALI) for generics, and
727 -- we want to avoid having different processing (namely, different
728 -- lists of files to be compiled) for different stages of the
729 -- bootstrap.
730
731 if not ((Nkind (Unit (Cunit)) in N_Generic_Declaration
732 or else
733 Nkind (Unit (Cunit)) in N_Generic_Renaming_Declaration)
734 and then Generic_May_Lack_ALI (Fname))
735 then
736 Write_Info_Tab (25);
737
738 if Is_Spec_Name (Uname) then
739 Body_Fname :=
740 Get_File_Name
741 (Get_Body_Name (Uname),
742 Subunit => False, May_Fail => True);
743
744 Body_Index :=
745 Get_Unit_Index
746 (Get_Body_Name (Uname));
747
748 if Body_Fname = No_File then
749 Body_Fname := Get_File_Name (Uname, Subunit => False);
750 Body_Index := Get_Unit_Index (Uname);
751 end if;
752
753 else
754 Body_Fname := Get_File_Name (Uname, Subunit => False);
755 Body_Index := Get_Unit_Index (Uname);
756 end if;
757
758 -- A package is considered to have a body if it requires
759 -- a body or if a body is present in Ada 83 mode.
760
761 if Body_Required (Cunit)
762 or else (Ada_Version = Ada_83
763 and then Full_Source_Name (Body_Fname) /= No_File)
764 then
765 Write_With_File_Names (Body_Fname, Body_Index);
766 else
767 Write_With_File_Names (Fname, Munit_Index (Unum));
768 end if;
769
770 if Ekind (Cunit_Entity (Unum)) = E_Package
771 and then From_With_Type (Cunit_Entity (Unum))
772 then
773 null;
774 else
775 if Elab_Flags (Unum) then
776 Write_Info_Str (" E");
777 end if;
778
779 if Elab_All_Flags (Unum) then
780 Write_Info_Str (" EA");
781 end if;
782
783 if Elab_Des_Flags (Unum) then
784 Write_Info_Str (" ED");
785 end if;
786
787 if Elab_All_Des_Flags (Unum) then
788 Write_Info_Str (" AD");
789 end if;
790 end if;
791 end if;
792
793 Write_Info_EOL;
794 end loop;
795 end Write_With_Lines;
796
797 -- Start of processing for Write_ALI
798
799 begin
800 -- We never write an ALI file if the original operating mode was
801 -- syntax-only (-gnats switch used in compiler invocation line)
802
803 if Original_Operating_Mode = Check_Syntax then
804 return;
805 end if;
806
807 -- Build sorted source dependency table. We do this right away,
808 -- because it is referenced by Up_To_Date_ALI_File_Exists.
809
810 for Unum in Units.First .. Last_Unit loop
811 if Cunit_Entity (Unum) = Empty
812 or else not From_With_Type (Cunit_Entity (Unum))
813 then
814 Num_Sdep := Num_Sdep + 1;
815 Sdep_Table (Num_Sdep) := Unum;
816 end if;
817 end loop;
818
819 -- Sort the table so that the D lines are in order
820
821 Lib.Sort (Sdep_Table (1 .. Num_Sdep));
822
823 -- If we are not generating code, and there is an up to date
824 -- ali file accessible, read it, and acquire the compilation
825 -- arguments from this file.
826
827 if Operating_Mode /= Generate_Code then
828 if Up_To_Date_ALI_File_Exists then
829 Update_Tables_From_ALI_File;
830 return;
831 end if;
832 end if;
833
834 -- Otherwise acquire compilation arguments and prepare to write
835 -- out a new ali file.
836
837 Create_Output_Library_Info;
838
839 -- Output version line
840
841 Write_Info_Initiate ('V');
842 Write_Info_Str (" """);
843 Write_Info_Str (Verbose_Library_Version);
844 Write_Info_Char ('"');
845
846 Write_Info_EOL;
847
848 -- Output main program line if this is acceptable main program
849
850 Output_Main_Program_Line : declare
851 U : Node_Id := Unit (Units.Table (Main_Unit).Cunit);
852 S : Node_Id;
853
854 procedure M_Parameters;
855 -- Output parameters for main program line
856
857 ------------------
858 -- M_Parameters --
859 ------------------
860
861 procedure M_Parameters is
862 begin
863 if Main_Priority (Main_Unit) /= Default_Main_Priority then
864 Write_Info_Char (' ');
865 Write_Info_Nat (Main_Priority (Main_Unit));
866 end if;
867
868 if Opt.Time_Slice_Set then
869 Write_Info_Str (" T=");
870 Write_Info_Nat (Opt.Time_Slice_Value);
871 end if;
872
873 Write_Info_Str (" W=");
874 Write_Info_Char
875 (WC_Encoding_Letters (Wide_Character_Encoding_Method));
876
877 Write_Info_EOL;
878 end M_Parameters;
879
880 -- Start of processing for Output_Main_Program_Line
881
882 begin
883 if Nkind (U) = N_Subprogram_Body
884 or else
885 (Nkind (U) = N_Package_Body
886 and then
887 Nkind (Original_Node (U)) in N_Subprogram_Instantiation)
888 then
889 -- If the unit is a subprogram instance, the entity for the
890 -- subprogram is the alias of the visible entity, which is the
891 -- related instance of the wrapper package. We retrieve the
892 -- subprogram declaration of the desired entity.
893
894 if Nkind (U) = N_Package_Body then
895 U := Parent (Parent (
896 Alias (Related_Instance (Defining_Unit_Name
897 (Specification (Unit (Library_Unit (Parent (U)))))))));
898 end if;
899
900 S := Specification (U);
901
902 if No (Parameter_Specifications (S)) then
903 if Nkind (S) = N_Procedure_Specification then
904 Write_Info_Initiate ('M');
905 Write_Info_Str (" P");
906 M_Parameters;
907
908 else
909 declare
910 Nam : Node_Id := Defining_Unit_Name (S);
911
912 begin
913 -- If it is a child unit, get its simple name
914
915 if Nkind (Nam) = N_Defining_Program_Unit_Name then
916 Nam := Defining_Identifier (Nam);
917 end if;
918
919 if Is_Integer_Type (Etype (Nam)) then
920 Write_Info_Initiate ('M');
921 Write_Info_Str (" F");
922 M_Parameters;
923 end if;
924 end;
925 end if;
926 end if;
927 end if;
928 end Output_Main_Program_Line;
929
930 -- Write command argument ('A') lines
931
932 for A in 1 .. Compilation_Switches.Last loop
933 Write_Info_Initiate ('A');
934 Write_Info_Char (' ');
935 Write_Info_Str (Compilation_Switches.Table (A).all);
936 Write_Info_Terminate;
937 end loop;
938
939 -- Output parameters ('P') line
940
941 Write_Info_Initiate ('P');
942
943 if Compilation_Errors then
944 Write_Info_Str (" CE");
945 end if;
946
947 if Opt.Detect_Blocking then
948 Write_Info_Str (" DB");
949 end if;
950
951 if Opt.Float_Format /= ' ' then
952 Write_Info_Str (" F");
953
954 if Opt.Float_Format = 'I' then
955 Write_Info_Char ('I');
956
957 elsif Opt.Float_Format_Long = 'D' then
958 Write_Info_Char ('D');
959
960 else
961 Write_Info_Char ('G');
962 end if;
963 end if;
964
965 if Tasking_Used
966 and then not Is_Predefined_File_Name (Unit_File_Name (Main_Unit))
967 then
968 if Locking_Policy /= ' ' then
969 Write_Info_Str (" L");
970 Write_Info_Char (Locking_Policy);
971 end if;
972
973 if Queuing_Policy /= ' ' then
974 Write_Info_Str (" Q");
975 Write_Info_Char (Queuing_Policy);
976 end if;
977
978 if Task_Dispatching_Policy /= ' ' then
979 Write_Info_Str (" T");
980 Write_Info_Char (Task_Dispatching_Policy);
981 Write_Info_Char (' ');
982 end if;
983 end if;
984
985 if not Object then
986 Write_Info_Str (" NO");
987 end if;
988
989 if No_Run_Time_Mode then
990 Write_Info_Str (" NR");
991 end if;
992
993 if Normalize_Scalars then
994 Write_Info_Str (" NS");
995 end if;
996
997 if Sec_Stack_Used then
998 Write_Info_Str (" SS");
999 end if;
1000
1001 if Unreserve_All_Interrupts then
1002 Write_Info_Str (" UA");
1003 end if;
1004
1005 if Exception_Mechanism = Back_End_Exceptions then
1006 Write_Info_Str (" ZX");
1007 end if;
1008
1009 Write_Info_EOL;
1010
1011 -- Before outputting the restrictions line, update the setting of
1012 -- the No_Elaboration_Code flag. Violations of this restriction
1013 -- cannot be detected until after the backend has been called since
1014 -- it is the backend that sets this flag. We have to check all units
1015 -- for which we have generated code
1016
1017 for Unit in Units.First .. Last_Unit loop
1018 if Units.Table (Unit).Generate_Code
1019 or else Unit = Main_Unit
1020 then
1021 if not Has_No_Elaboration_Code (Cunit (Unit)) then
1022 Main_Restrictions.Violated (No_Elaboration_Code) := True;
1023 end if;
1024 end if;
1025 end loop;
1026
1027 -- Output first restrictions line
1028
1029 Write_Info_Initiate ('R');
1030 Write_Info_Char (' ');
1031
1032 -- First the information for the boolean restrictions
1033
1034 for R in All_Boolean_Restrictions loop
1035 if Main_Restrictions.Set (R)
1036 and then not Restriction_Warnings (R)
1037 then
1038 Write_Info_Char ('r');
1039 elsif Main_Restrictions.Violated (R) then
1040 Write_Info_Char ('v');
1041 else
1042 Write_Info_Char ('n');
1043 end if;
1044 end loop;
1045
1046 -- And now the information for the parameter restrictions
1047
1048 for RP in All_Parameter_Restrictions loop
1049 if Main_Restrictions.Set (RP)
1050 and then not Restriction_Warnings (RP)
1051 then
1052 Write_Info_Char ('r');
1053 Write_Info_Nat (Nat (Main_Restrictions.Value (RP)));
1054 else
1055 Write_Info_Char ('n');
1056 end if;
1057
1058 if not Main_Restrictions.Violated (RP)
1059 or else RP not in Checked_Parameter_Restrictions
1060 then
1061 Write_Info_Char ('n');
1062 else
1063 Write_Info_Char ('v');
1064 Write_Info_Nat (Nat (Main_Restrictions.Count (RP)));
1065
1066 if Main_Restrictions.Unknown (RP) then
1067 Write_Info_Char ('+');
1068 end if;
1069 end if;
1070 end loop;
1071
1072 Write_Info_EOL;
1073
1074 -- Output R lines for No_Dependence entries
1075
1076 for J in No_Dependence.First .. No_Dependence.Last loop
1077 if In_Extended_Main_Source_Unit (No_Dependence.Table (J).Unit)
1078 and then not No_Dependence.Table (J).Warn
1079 then
1080 Write_Info_Initiate ('R');
1081 Write_Info_Char (' ');
1082 Write_Unit_Name (No_Dependence.Table (J).Unit);
1083 Write_Info_EOL;
1084 end if;
1085 end loop;
1086
1087 -- Output interrupt state lines
1088
1089 for J in Interrupt_States.First .. Interrupt_States.Last loop
1090 Write_Info_Initiate ('I');
1091 Write_Info_Char (' ');
1092 Write_Info_Nat (Interrupt_States.Table (J).Interrupt_Number);
1093 Write_Info_Char (' ');
1094 Write_Info_Char (Interrupt_States.Table (J).Interrupt_State);
1095 Write_Info_Char (' ');
1096 Write_Info_Nat
1097 (Nat (Get_Logical_Line_Number
1098 (Interrupt_States.Table (J).Pragma_Loc)));
1099 Write_Info_EOL;
1100 end loop;
1101
1102 -- Output priority specific dispatching lines
1103
1104 for J in Specific_Dispatching.First .. Specific_Dispatching.Last loop
1105 Write_Info_Initiate ('S');
1106 Write_Info_Char (' ');
1107 Write_Info_Char (Specific_Dispatching.Table (J).Dispatching_Policy);
1108 Write_Info_Char (' ');
1109 Write_Info_Nat (Specific_Dispatching.Table (J).First_Priority);
1110 Write_Info_Char (' ');
1111 Write_Info_Nat (Specific_Dispatching.Table (J).Last_Priority);
1112 Write_Info_Char (' ');
1113 Write_Info_Nat
1114 (Nat (Get_Logical_Line_Number
1115 (Specific_Dispatching.Table (J).Pragma_Loc)));
1116 Write_Info_EOL;
1117 end loop;
1118
1119 -- Loop through file table to output information for all units for which
1120 -- we have generated code, as marked by the Generate_Code flag.
1121
1122 for Unit in Units.First .. Last_Unit loop
1123 if Units.Table (Unit).Generate_Code
1124 or else Unit = Main_Unit
1125 then
1126 Write_Info_EOL; -- blank line
1127 Write_Unit_Information (Unit);
1128 end if;
1129 end loop;
1130
1131 Write_Info_EOL; -- blank line
1132
1133 -- Output external version reference lines
1134
1135 for J in 1 .. Version_Ref.Last loop
1136 Write_Info_Initiate ('E');
1137 Write_Info_Char (' ');
1138
1139 for K in 1 .. String_Length (Version_Ref.Table (J)) loop
1140 Write_Info_Char_Code (Get_String_Char (Version_Ref.Table (J), K));
1141 end loop;
1142
1143 Write_Info_EOL;
1144 end loop;
1145
1146 -- Prepare to output the source dependency lines
1147
1148 declare
1149 Unum : Unit_Number_Type;
1150 -- Number of unit being output
1151
1152 Sind : Source_File_Index;
1153 -- Index of corresponding source file
1154
1155 Fname : File_Name_Type;
1156
1157 begin
1158 for J in 1 .. Num_Sdep loop
1159 Unum := Sdep_Table (J);
1160 Units.Table (Unum).Dependency_Num := J;
1161 Sind := Units.Table (Unum).Source_Index;
1162
1163 Write_Info_Initiate ('D');
1164 Write_Info_Char (' ');
1165
1166 -- Normal case of a unit entry with a source index
1167
1168 if Sind /= No_Source_File then
1169 Fname := File_Name (Sind);
1170
1171 -- Ensure that on platforms where the file names are not
1172 -- case sensitive, the recorded file name is in lower case.
1173
1174 if not File_Names_Case_Sensitive then
1175 Get_Name_String (Fname);
1176 To_Lower (Name_Buffer (1 .. Name_Len));
1177 Fname := Name_Find;
1178 end if;
1179
1180 Write_Info_Name (Fname);
1181 Write_Info_Tab (25);
1182 Write_Info_Str (String (Time_Stamp (Sind)));
1183 Write_Info_Char (' ');
1184 Write_Info_Str (Get_Hex_String (Source_Checksum (Sind)));
1185
1186 -- If subunit, add unit name, omitting the %b at the end
1187
1188 if Present (Cunit (Unum))
1189 and then Nkind (Unit (Cunit (Unum))) = N_Subunit
1190 then
1191 Get_Decoded_Name_String (Unit_Name (Unum));
1192 Write_Info_Char (' ');
1193 Write_Info_Str (Name_Buffer (1 .. Name_Len - 2));
1194 end if;
1195
1196 -- If Source_Reference pragma used output information
1197
1198 if Num_SRef_Pragmas (Sind) > 0 then
1199 Write_Info_Char (' ');
1200
1201 if Num_SRef_Pragmas (Sind) = 1 then
1202 Write_Info_Nat (Int (First_Mapped_Line (Sind)));
1203 else
1204 Write_Info_Nat (0);
1205 end if;
1206
1207 Write_Info_Char (':');
1208 Write_Info_Name (Reference_Name (Sind));
1209 end if;
1210
1211 -- Case where there is no source index (happens for missing
1212 -- files). In this case we write a dummy time stamp.
1213
1214 else
1215 Write_Info_Name (Unit_File_Name (Unum));
1216 Write_Info_Tab (25);
1217 Write_Info_Str (String (Dummy_Time_Stamp));
1218 Write_Info_Char (' ');
1219 Write_Info_Str (Get_Hex_String (0));
1220 end if;
1221
1222 Write_Info_EOL;
1223 end loop;
1224 end;
1225
1226 Output_References;
1227 Write_Info_Terminate;
1228 Close_Output_Library_Info;
1229 end Write_ALI;
1230
1231 ---------------------
1232 -- Write_Unit_Name --
1233 ---------------------
1234
1235 procedure Write_Unit_Name (N : Node_Id) is
1236 begin
1237 if Nkind (N) = N_Identifier then
1238 Write_Info_Name (Chars (N));
1239
1240 else
1241 pragma Assert (Nkind (N) = N_Selected_Component);
1242 Write_Unit_Name (Prefix (N));
1243 Write_Info_Char ('.');
1244 Write_Unit_Name (Selector_Name (N));
1245 end if;
1246 end Write_Unit_Name;
1247
1248 end Lib.Writ;
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