1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2016, Free Software Foundation, Inc. --
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. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
27 with Atree
; use Atree
;
28 with Casing
; use Casing
;
29 with Debug
; use Debug
;
30 with Einfo
; use Einfo
;
31 with Errout
; use Errout
;
32 with Fname
; use Fname
;
33 with Fname
.UF
; use Fname
.UF
;
34 with Lib
.Util
; use Lib
.Util
;
35 with Lib
.Xref
; use Lib
.Xref
;
36 with Nlists
; use Nlists
;
37 with Gnatvsn
; use Gnatvsn
;
39 with Osint
; use Osint
;
40 with Osint
.C
; use Osint
.C
;
41 with Output
; use Output
;
43 with Par_SCO
; use Par_SCO
;
44 with Restrict
; use Restrict
;
45 with Rident
; use Rident
;
47 with Sem_Eval
; use Sem_Eval
;
48 with Sinfo
; use Sinfo
;
49 with Sinput
; use Sinput
;
50 with Snames
; use Snames
;
51 with Stringt
; use Stringt
;
52 with Tbuild
; use Tbuild
;
53 with Uname
; use Uname
;
55 with System
.Case_Util
; use System
.Case_Util
;
56 with System
.WCh_Con
; use System
.WCh_Con
;
58 package body Lib
.Writ
is
60 -----------------------
61 -- Local Subprograms --
62 -----------------------
64 procedure Write_Unit_Name
(N
: Node_Id
);
65 -- Used to write out the unit name for R (pragma Restriction) lines
66 -- for uses of Restriction (No_Dependence => unit-name).
68 ----------------------------------
69 -- Add_Preprocessing_Dependency --
70 ----------------------------------
72 procedure Add_Preprocessing_Dependency
(S
: Source_File_Index
) is
75 Units
.Table
(Units
.Last
) :=
76 (Unit_File_Name
=> File_Name
(S
),
77 Unit_Name
=> No_Unit_Name
,
78 Expected_Unit
=> No_Unit_Name
,
81 Cunit_Entity
=> Empty
,
83 Dynamic_Elab
=> False,
85 Generate_Code
=> False,
88 Ident_String
=> Empty
,
93 No_Elab_Code_All
=> False,
96 Error_Location
=> No_Location
,
98 SPARK_Mode_Pragma
=> Empty
);
99 end Add_Preprocessing_Dependency
;
101 ------------------------------
102 -- Ensure_System_Dependency --
103 ------------------------------
105 procedure Ensure_System_Dependency
is
106 System_Uname
: Unit_Name_Type
;
107 -- Unit name for system spec if needed for dummy entry
109 System_Fname
: File_Name_Type
;
110 -- File name for system spec if needed for dummy entry
113 -- Nothing to do if we already compiled System
115 for Unum
in Units
.First
.. Last_Unit
loop
116 if Units
.Table
(Unum
).Source_Index
= System_Source_File_Index
then
121 -- If no entry for system.ads in the units table, then add a entry
122 -- to the units table for system.ads, which will be referenced when
123 -- the ali file is generated. We need this because every unit depends
124 -- on system as a result of Targparm scanning the system.ads file to
125 -- determine the target dependent parameters for the compilation.
128 Name_Buffer
(1 .. 6) := "system";
129 System_Uname
:= Name_To_Unit_Name
(Name_Enter
);
130 System_Fname
:= File_Name
(System_Source_File_Index
);
132 Units
.Increment_Last
;
133 Units
.Table
(Units
.Last
) := (
134 Unit_File_Name
=> System_Fname
,
135 Unit_Name
=> System_Uname
,
136 Expected_Unit
=> System_Uname
,
137 Source_Index
=> System_Source_File_Index
,
139 Cunit_Entity
=> Empty
,
141 Dynamic_Elab
=> False,
143 Generate_Code
=> False,
146 Ident_String
=> Empty
,
151 No_Elab_Code_All
=> False,
154 Error_Location
=> No_Location
,
156 SPARK_Mode_Pragma
=> Empty
);
158 -- Parse system.ads so that the checksum is set right,
159 -- Style checks are not applied. The Ekind is set to ensure
160 -- that this reference is always present in the ali file.
163 Save_Mindex
: constant Nat
:= Multiple_Unit_Index
;
164 Save_Style
: constant Boolean := Style_Check
;
166 Multiple_Unit_Index
:= 0;
167 Style_Check
:= False;
168 Initialize_Scanner
(Units
.Last
, System_Source_File_Index
);
169 Discard_List
(Par
(Configuration_Pragmas
=> False));
170 Set_Ekind
(Cunit_Entity
(Units
.Last
), E_Package
);
171 Style_Check
:= Save_Style
;
172 Multiple_Unit_Index
:= Save_Mindex
;
174 end Ensure_System_Dependency
;
180 procedure Write_ALI
(Object
: Boolean) is
186 Last_Unit
: constant Unit_Number_Type
:= Units
.Last
;
187 -- Record unit number of last unit. We capture this in case we
188 -- have to add a dummy entry to the unit table for package System.
190 With_Flags
: array (Units
.First
.. Last_Unit
) of Boolean;
191 -- Array of flags to show which units are with'ed
193 Elab_Flags
: array (Units
.First
.. Last_Unit
) of Boolean;
194 -- Array of flags to show which units have pragma Elaborate set
196 Elab_All_Flags
: array (Units
.First
.. Last_Unit
) of Boolean;
197 -- Array of flags to show which units have pragma Elaborate All set
199 Elab_Des_Flags
: array (Units
.First
.. Last_Unit
) of Boolean;
200 -- Array of flags to show which units have Elaborate_Desirable set
202 Elab_All_Des_Flags
: array (Units
.First
.. Last_Unit
) of Boolean;
203 -- Array of flags to show which units have Elaborate_All_Desirable set
205 type Yes_No
is (Unknown
, Yes
, No
);
206 Implicit_With
: array (Units
.First
.. Last_Unit
) of Yes_No
;
207 -- Indicates if an implicit with has been given for the unit. Yes if
208 -- certainly present, no if certainly absent, unkonwn if not known.
210 Sdep_Table
: Unit_Ref_Table
(1 .. Pos
(Last_Unit
- Units
.First
+ 2));
211 -- Sorted table of source dependencies. One extra entry in case we
212 -- have to add a dummy entry for System.
215 -- Number of active entries in Sdep_Table
217 flag_compare_debug
: Int
;
218 pragma Import
(C
, flag_compare_debug
);
219 -- Import from toplev.c
221 -----------------------
222 -- Local Subprograms --
223 -----------------------
225 procedure Collect_Withs
(Cunit
: Node_Id
);
226 -- Collect with lines for entries in the context clause of the
227 -- given compilation unit, Cunit.
229 procedure Update_Tables_From_ALI_File
;
230 -- Given an up to date ALI file (see Up_To_Date_ALI_file_Exists
231 -- function), update tables from the ALI information, including
232 -- specifically the Compilation_Switches table.
234 function Up_To_Date_ALI_File_Exists
return Boolean;
235 -- If there exists an ALI file that is up to date, then this function
236 -- initializes the tables in the ALI spec to contain information on
237 -- this file (using Scan_ALI) and returns True. If no file exists,
238 -- or the file is not up to date, then False is returned.
240 procedure Write_Unit_Information
(Unit_Num
: Unit_Number_Type
);
241 -- Write out the library information for one unit for which code is
242 -- generated (includes unit line and with lines).
244 procedure Write_With_Lines
;
245 -- Write out with lines collected by calls to Collect_Withs
251 procedure Collect_Withs
(Cunit
: Node_Id
) is
253 Unum
: Unit_Number_Type
;
256 Item
:= First
(Context_Items
(Cunit
));
257 while Present
(Item
) loop
259 -- Process with clause
261 -- Ada 2005 (AI-50217): limited with_clauses do not create
262 -- dependencies, but must be recorded as components of the
263 -- partition, in case there is no regular with_clause for
264 -- the unit anywhere else.
266 if Nkind
(Item
) = N_With_Clause
then
267 Unum
:= Get_Cunit_Unit_Number
(Library_Unit
(Item
));
268 With_Flags
(Unum
) := True;
270 if not Limited_Present
(Item
) then
271 if Elaborate_Present
(Item
) then
272 Elab_Flags
(Unum
) := True;
275 if Elaborate_All_Present
(Item
) then
276 Elab_All_Flags
(Unum
) := True;
279 if Elaborate_All_Desirable
(Item
) then
280 Elab_All_Des_Flags
(Unum
) := True;
283 if Elaborate_Desirable
(Item
) then
284 Elab_Des_Flags
(Unum
) := True;
288 Set_From_Limited_With
(Cunit_Entity
(Unum
));
291 if Implicit_With
(Unum
) /= Yes
then
292 if Implicit_With_From_Instantiation
(Item
) then
293 Implicit_With
(Unum
) := Yes
;
295 Implicit_With
(Unum
) := No
;
304 --------------------------------
305 -- Up_To_Date_ALI_File_Exists --
306 --------------------------------
308 function Up_To_Date_ALI_File_Exists
return Boolean is
309 Name
: File_Name_Type
;
310 Text
: Text_Buffer_Ptr
;
312 Sind
: Source_File_Index
;
315 Opt
.Check_Object_Consistency
:= True;
316 Read_Library_Info
(Name
, Text
);
318 -- Return if we could not find an ALI file
324 -- Return if ALI file has bad format
328 if Scan_ALI
(Name
, Text
, False, Err
=> True) = No_ALI_Id
then
332 -- If we have an OK ALI file, check if it is up to date
333 -- Note that we assume that the ALI read has all the entries
334 -- we have in our table, plus some additional ones (that can
335 -- come from expansion).
337 Id
:= First_Sdep_Entry
;
338 for J
in 1 .. Num_Sdep
loop
339 Sind
:= Units
.Table
(Sdep_Table
(J
)).Source_Index
;
341 while Sdep
.Table
(Id
).Sfile
/= File_Name
(Sind
) loop
342 if Id
= Sdep
.Last
then
349 if Sdep
.Table
(Id
).Stamp
/= Time_Stamp
(Sind
) then
355 end Up_To_Date_ALI_File_Exists
;
357 ---------------------------------
358 -- Update_Tables_From_ALI_File --
359 ---------------------------------
361 procedure Update_Tables_From_ALI_File
is
363 -- Build Compilation_Switches table
365 Compilation_Switches
.Init
;
367 for J
in First_Arg_Entry
.. Args
.Last
loop
368 Compilation_Switches
.Increment_Last
;
369 Compilation_Switches
.Table
(Compilation_Switches
.Last
) :=
372 end Update_Tables_From_ALI_File
;
374 ----------------------------
375 -- Write_Unit_Information --
376 ----------------------------
378 procedure Write_Unit_Information
(Unit_Num
: Unit_Number_Type
) is
379 Unode
: constant Node_Id
:= Cunit
(Unit_Num
);
380 Ukind
: constant Node_Kind
:= Nkind
(Unit
(Unode
));
381 Uent
: constant Entity_Id
:= Cunit_Entity
(Unit_Num
);
385 Write_Info_Initiate
('U');
386 Write_Info_Char
(' ');
387 Write_Info_Name
(Unit_Name
(Unit_Num
));
389 Write_Info_Name
(Unit_File_Name
(Unit_Num
));
392 Write_Info_Str
(Version_Get
(Unit_Num
));
394 -- Add BD parameter if Elaborate_Body pragma desirable
396 if Ekind
(Uent
) = E_Package
397 and then Elaborate_Body_Desirable
(Uent
)
399 Write_Info_Str
(" BD");
402 -- Add BN parameter if body needed for SAL
404 if (Is_Subprogram
(Uent
)
405 or else Ekind
(Uent
) = E_Package
406 or else Is_Generic_Unit
(Uent
))
407 and then Body_Needed_For_SAL
(Uent
)
409 Write_Info_Str
(" BN");
412 if Dynamic_Elab
(Unit_Num
) then
413 Write_Info_Str
(" DE");
416 -- Set the Elaborate_Body indication if either an explicit pragma
417 -- was present, or if this is an instantiation.
419 if Has_Pragma_Elaborate_Body
(Uent
)
420 or else (Ukind
= N_Package_Declaration
421 and then Is_Generic_Instance
(Uent
)
422 and then Present
(Corresponding_Body
(Unit
(Unode
))))
424 Write_Info_Str
(" EB");
427 -- Now see if we should tell the binder that an elaboration entity
428 -- is present, which must be set to true during elaboration.
429 -- We generate the indication if the following condition is met:
431 -- If this is a spec ...
433 if (Is_Subprogram
(Uent
)
434 or else Ekind
(Uent
) = E_Package
435 or else Is_Generic_Unit
(Uent
))
437 -- and an elaboration entity was declared ...
439 and then Present
(Elaboration_Entity
(Uent
))
441 -- and either the elaboration flag is required ...
443 and then (Elaboration_Entity_Required
(Uent
)
445 -- or this unit has elaboration code ...
447 or else not Has_No_Elaboration_Code
(Unode
)
449 -- or this unit has a separate body and this
450 -- body has elaboration code.
453 (Ekind
(Uent
) = E_Package
454 and then Present
(Body_Entity
(Uent
))
456 not Has_No_Elaboration_Code
457 (Parent
(Declaration_Node
(Body_Entity
(Uent
))))))
459 Write_Info_Str
(" EE");
462 if Has_No_Elaboration_Code
(Unode
) then
463 Write_Info_Str
(" NE");
466 Write_Info_Str
(" O");
467 Write_Info_Char
(OA_Setting
(Unit_Num
));
469 if Ekind_In
(Uent
, E_Package
, E_Package_Body
)
470 and then Present
(Finalizer
(Uent
))
472 Write_Info_Str
(" PF");
475 if Is_Preelaborated
(Uent
) then
476 Write_Info_Str
(" PR");
479 if Is_Pure
(Uent
) then
480 Write_Info_Str
(" PU");
483 if Has_RACW
(Unit_Num
) then
484 Write_Info_Str
(" RA");
487 if Is_Remote_Call_Interface
(Uent
) then
488 Write_Info_Str
(" RC");
491 if Is_Remote_Types
(Uent
) then
492 Write_Info_Str
(" RT");
495 if Serious_Errors_Detected
/= 0 then
496 Write_Info_Str
(" SE");
499 if Is_Shared_Passive
(Uent
) then
500 Write_Info_Str
(" SP");
503 if Ukind
= N_Subprogram_Declaration
504 or else Ukind
= N_Subprogram_Body
506 Write_Info_Str
(" SU");
508 elsif Ukind
= N_Package_Declaration
510 Ukind
= N_Package_Body
512 -- If this is a wrapper package for a subprogram instantiation,
513 -- the user view is the subprogram. Note that in this case the
514 -- ali file contains both the spec and body of the instance.
516 if Is_Wrapper_Package
(Uent
) then
517 Write_Info_Str
(" SU");
519 Write_Info_Str
(" PK");
522 elsif Ukind
= N_Generic_Package_Declaration
then
523 Write_Info_Str
(" PK");
527 if Ukind
in N_Generic_Declaration
529 (Present
(Library_Unit
(Unode
))
531 Nkind
(Unit
(Library_Unit
(Unode
))) in N_Generic_Declaration
)
533 Write_Info_Str
(" GE");
536 if not Is_Internal_File_Name
(Unit_File_Name
(Unit_Num
), True) then
537 case Identifier_Casing
(Source_Index
(Unit_Num
)) is
538 when All_Lower_Case
=> Write_Info_Str
(" IL");
539 when All_Upper_Case
=> Write_Info_Str
(" IU");
543 case Keyword_Casing
(Source_Index
(Unit_Num
)) is
544 when Mixed_Case
=> Write_Info_Str
(" KM");
545 when All_Upper_Case
=> Write_Info_Str
(" KU");
550 if Initialize_Scalars
or else Invalid_Value_Used
then
551 Write_Info_Str
(" IS");
556 -- Generate with lines, first those that are directly with'ed
558 for J
in With_Flags
'Range loop
559 With_Flags
(J
) := False;
560 Elab_Flags
(J
) := False;
561 Elab_All_Flags
(J
) := False;
562 Elab_Des_Flags
(J
) := False;
563 Elab_All_Des_Flags
(J
) := False;
564 Implicit_With
(J
) := Unknown
;
567 Collect_Withs
(Unode
);
569 -- For a body, we must also check for any subunits which belong to
570 -- it and which have context clauses of their own, since these
571 -- with'ed units are part of its own elaboration dependencies.
573 if Nkind
(Unit
(Unode
)) in N_Unit_Body
then
574 for S
in Units
.First
.. Last_Unit
loop
576 -- We are only interested in subunits. For preproc. data and
577 -- def. files, Cunit is Empty, so we need to test that first.
579 if Cunit
(S
) /= Empty
580 and then Nkind
(Unit
(Cunit
(S
))) = N_Subunit
582 Pnode
:= Library_Unit
(Cunit
(S
));
584 -- In gnatc mode, the errors in the subunits will not have
585 -- been recorded, but the analysis of the subunit may have
586 -- failed. There is no information to add to ALI file in
593 -- Find ultimate parent of the subunit
595 while Nkind
(Unit
(Pnode
)) = N_Subunit
loop
596 Pnode
:= Library_Unit
(Pnode
);
599 -- See if it belongs to current unit, and if so, include
602 if Pnode
= Unode
then
603 Collect_Withs
(Cunit
(S
));
611 -- Generate the linker option lines
613 for J
in 1 .. Linker_Option_Lines
.Last
loop
615 -- Pragma Linker_Options is not allowed in predefined generic
616 -- units. This is because they won't be read, due to the fact that
617 -- with lines for generic units lack the file name and lib name
618 -- parameters (see Lib_Writ spec for an explanation).
620 if Is_Generic_Unit
(Cunit_Entity
(Main_Unit
))
622 Is_Predefined_File_Name
(Unit_File_Name
(Current_Sem_Unit
))
623 and then Linker_Option_Lines
.Table
(J
).Unit
= Unit_Num
627 ("linker options not allowed in predefined generic unit");
628 raise Unrecoverable_Error
;
631 -- Output one linker option line
634 S
: Linker_Option_Entry
renames Linker_Option_Lines
.Table
(J
);
636 if S
.Unit
= Unit_Num
then
637 Write_Info_Initiate
('L');
638 Write_Info_Char
(' ');
639 Write_Info_Slit
(S
.Option
);
647 for J
in 1 .. Notes
.Last
loop
649 N
: constant Node_Id
:= Notes
.Table
(J
);
650 L
: constant Source_Ptr
:= Sloc
(N
);
651 U
: constant Unit_Number_Type
:=
652 Unit
(Get_Source_File_Index
(L
));
655 Note_Unit
: Unit_Number_Type
;
656 -- The unit in whose U section this note must be emitted:
657 -- notes for subunits are emitted along with the main unit;
658 -- all other notes are emitted as part of the enclosing
662 if U
/= No_Unit
and then Nkind
(Unit
(Cunit
(U
))) = N_Subunit
664 Note_Unit
:= Main_Unit
;
669 if Note_Unit
= Unit_Num
then
670 Write_Info_Initiate
('N');
671 Write_Info_Char
(' ');
673 case Chars
(Pragma_Identifier
(N
)) is
674 when Name_Annotate
=>
682 when Name_Subtitle
=>
689 Write_Info_Int
(Int
(Get_Logical_Line_Number
(L
)));
690 Write_Info_Char
(':');
691 Write_Info_Int
(Int
(Get_Column_Number
(L
)));
693 -- Indicate source file of annotation if different from
694 -- compilation unit source file (case of annotation coming
697 if Get_Source_File_Index
(L
) /= Source_Index
(Unit_Num
) then
698 Write_Info_Char
(':');
699 Write_Info_Name
(File_Name
(Get_Source_File_Index
(L
)));
706 A
:= First
(Pragma_Argument_Associations
(N
));
707 while Present
(A
) loop
708 Write_Info_Char
(' ');
710 if Chars
(A
) /= No_Name
then
711 Write_Info_Name
(Chars
(A
));
712 Write_Info_Char
(':');
716 Expr
: constant Node_Id
:= Expression
(A
);
719 if Nkind
(Expr
) = N_Identifier
then
720 Write_Info_Name
(Chars
(Expr
));
722 elsif Nkind
(Expr
) = N_Integer_Literal
723 and then Is_OK_Static_Expression
(Expr
)
725 Write_Info_Uint
(Intval
(Expr
));
727 elsif Nkind
(Expr
) = N_String_Literal
728 and then Is_OK_Static_Expression
(Expr
)
730 Write_Info_Slit
(Strval
(Expr
));
733 Write_Info_Str
("<expr>");
745 end Write_Unit_Information
;
747 ----------------------
748 -- Write_With_Lines --
749 ----------------------
751 procedure Write_With_Lines
is
752 Pname
: constant Unit_Name_Type
:=
753 Get_Parent_Spec_Name
(Unit_Name
(Main_Unit
));
754 Body_Fname
: File_Name_Type
;
757 Fname
: File_Name_Type
;
758 Num_Withs
: Int
:= 0;
759 Unum
: Unit_Number_Type
;
760 Uname
: Unit_Name_Type
;
761 With_Table
: Unit_Ref_Table
(1 .. Pos
(Last_Unit
- Units
.First
+ 1));
763 procedure Write_With_File_Names
764 (Nam
: in out File_Name_Type
;
766 -- Write source file name Nam and ALI file name for unit index Idx.
767 -- Possibly change Nam to lowercase (generating a new file name).
769 --------------------------
770 -- Write_With_File_Name --
771 --------------------------
773 procedure Write_With_File_Names
774 (Nam
: in out File_Name_Type
;
778 if not File_Names_Case_Sensitive
then
779 Get_Name_String
(Nam
);
780 To_Lower
(Name_Buffer
(1 .. Name_Len
));
784 Write_Info_Name
(Nam
);
786 Write_Info_Name
(Lib_File_Name
(Nam
, Idx
));
787 end Write_With_File_Names
;
789 -- Start of processing for Write_With_Lines
792 -- Loop to build the with table. A with on the main unit itself
793 -- is ignored (AARM 10.2(14a)). Such a with-clause can occur if
794 -- the main unit is a subprogram with no spec, and a subunit of
795 -- it unnecessarily withs the parent.
797 for J
in Units
.First
+ 1 .. Last_Unit
loop
799 -- Add element to with table if it is with'ed or if it is the
800 -- parent spec of the main unit (case of main unit is a child
801 -- unit). The latter with is not needed for semantic purposes,
802 -- but is required by the binder for elaboration purposes. For
803 -- preprocessing data and definition files, there is no Unit_Name,
804 -- check for that first.
806 if Unit_Name
(J
) /= No_Unit_Name
807 and then (With_Flags
(J
) or else Unit_Name
(J
) = Pname
)
809 Num_Withs
:= Num_Withs
+ 1;
810 With_Table
(Num_Withs
) := J
;
814 -- Sort and output the table
816 Sort
(With_Table
(1 .. Num_Withs
));
818 for J
in 1 .. Num_Withs
loop
819 Unum
:= With_Table
(J
);
821 -- Do not generate a with line for an ignored Ghost unit because
822 -- the unit does not have an ALI file.
824 if Is_Ignored_Ghost_Entity
(Cunit_Entity
(Unum
)) then
828 Cunit
:= Units
.Table
(Unum
).Cunit
;
829 Uname
:= Units
.Table
(Unum
).Unit_Name
;
830 Fname
:= Units
.Table
(Unum
).Unit_File_Name
;
832 if Implicit_With
(Unum
) = Yes
then
833 Write_Info_Initiate
('Z');
835 elsif Ekind
(Cunit_Entity
(Unum
)) = E_Package
836 and then From_Limited_With
(Cunit_Entity
(Unum
))
838 Write_Info_Initiate
('Y');
841 Write_Info_Initiate
('W');
844 Write_Info_Char
(' ');
845 Write_Info_Name
(Uname
);
847 -- Now we need to figure out the names of the files that contain
848 -- the with'ed unit. These will usually be the files for the body,
849 -- except in the case of a package that has no body. Note that we
850 -- have a specific exemption here for predefined library generics
851 -- (see comments for Generic_May_Lack_ALI). We do not generate
852 -- dependency upon the ALI file for such units. Older compilers
853 -- used to not support generating code (and ALI) for generics, and
854 -- we want to avoid having different processing (namely, different
855 -- lists of files to be compiled) for different stages of the
858 if not ((Nkind
(Unit
(Cunit
)) in N_Generic_Declaration
860 Nkind
(Unit
(Cunit
)) in N_Generic_Renaming_Declaration
)
861 and then Generic_May_Lack_ALI
(Fname
))
863 -- In SPARK mode, always generate the dependencies on ALI
864 -- files, which are required to compute frame conditions
867 or else GNATprove_Mode
871 if Is_Spec_Name
(Uname
) then
874 (Get_Body_Name
(Uname
),
875 Subunit
=> False, May_Fail
=> True);
879 (Get_Body_Name
(Uname
));
881 if Body_Fname
= No_File
then
882 Body_Fname
:= Get_File_Name
(Uname
, Subunit
=> False);
883 Body_Index
:= Get_Unit_Index
(Uname
);
887 Body_Fname
:= Get_File_Name
(Uname
, Subunit
=> False);
888 Body_Index
:= Get_Unit_Index
(Uname
);
891 -- A package is considered to have a body if it requires
892 -- a body or if a body is present in Ada 83 mode.
894 if Body_Required
(Cunit
)
895 or else (Ada_Version
= Ada_83
896 and then Full_Source_Name
(Body_Fname
) /= No_File
)
898 Write_With_File_Names
(Body_Fname
, Body_Index
);
900 Write_With_File_Names
(Fname
, Munit_Index
(Unum
));
903 if Ekind
(Cunit_Entity
(Unum
)) = E_Package
904 and then From_Limited_With
(Cunit_Entity
(Unum
))
908 if Elab_Flags
(Unum
) then
909 Write_Info_Str
(" E");
912 if Elab_All_Flags
(Unum
) then
913 Write_Info_Str
(" EA");
916 if Elab_Des_Flags
(Unum
) then
917 Write_Info_Str
(" ED");
920 if Elab_All_Des_Flags
(Unum
) then
921 Write_Info_Str
(" AD");
932 -- Finally generate the special lines for cases of Restriction_Set
933 -- with No_Dependence and no restriction present.
936 Unam
: Unit_Name_Type
;
939 for J
in Restriction_Set_Dependences
.First
..
940 Restriction_Set_Dependences
.Last
942 Unam
:= Restriction_Set_Dependences
.Table
(J
);
944 -- Don't need an entry if already in the unit table
946 for U
in 0 .. Last_Unit
loop
947 if Unit_Name
(U
) = Unam
then
948 goto Next_Restriction_Set
;
952 -- Otherwise generate the entry
954 Write_Info_Initiate
('W');
955 Write_Info_Char
(' ');
956 Write_Info_Name
(Unam
);
959 <<Next_Restriction_Set
>>
963 end Write_With_Lines
;
965 -- Start of processing for Write_ALI
968 -- We never write an ALI file if the original operating mode was
969 -- syntax-only (-gnats switch used in compiler invocation line)
971 if Original_Operating_Mode
= Check_Syntax
972 or flag_compare_debug
/= 0
977 -- Generation of ALI files may be disabled, e.g. for formal verification
980 if Disable_ALI_File
then
984 -- Build sorted source dependency table. We do this right away, because
985 -- it is referenced by Up_To_Date_ALI_File_Exists.
987 for Unum
in Units
.First
.. Last_Unit
loop
988 if Cunit_Entity
(Unum
) = Empty
989 or else not From_Limited_With
(Cunit_Entity
(Unum
))
991 Num_Sdep
:= Num_Sdep
+ 1;
992 Sdep_Table
(Num_Sdep
) := Unum
;
996 -- Sort the table so that the D lines are in order
998 Lib
.Sort
(Sdep_Table
(1 .. Num_Sdep
));
1000 -- If we are not generating code, and there is an up to date ALI file
1001 -- file accessible, read it, and acquire the compilation arguments from
1002 -- this file. In GNATprove mode, always generate the ALI file, which
1003 -- contains a special section for formal verification.
1005 if Operating_Mode
/= Generate_Code
and then not GNATprove_Mode
then
1006 if Up_To_Date_ALI_File_Exists
then
1007 Update_Tables_From_ALI_File
;
1012 -- Otherwise acquire compilation arguments and prepare to write out a
1015 Create_Output_Library_Info
;
1017 -- Output version line
1019 Write_Info_Initiate
('V');
1020 Write_Info_Str
(" """);
1021 Write_Info_Str
(Verbose_Library_Version
);
1022 Write_Info_Char
('"');
1026 -- Output main program line if this is acceptable main program
1028 Output_Main_Program_Line
: declare
1029 U
: Node_Id
:= Unit
(Units
.Table
(Main_Unit
).Cunit
);
1032 procedure M_Parameters
;
1033 -- Output parameters for main program line
1039 procedure M_Parameters
is
1041 if Main_Priority
(Main_Unit
) /= Default_Main_Priority
then
1042 Write_Info_Char
(' ');
1043 Write_Info_Nat
(Main_Priority
(Main_Unit
));
1046 if Opt
.Time_Slice_Set
then
1047 Write_Info_Str
(" T=");
1048 Write_Info_Nat
(Opt
.Time_Slice_Value
);
1051 if Main_CPU
(Main_Unit
) /= Default_Main_CPU
then
1052 Write_Info_Str
(" C=");
1053 Write_Info_Nat
(Main_CPU
(Main_Unit
));
1056 Write_Info_Str
(" W=");
1058 (WC_Encoding_Letters
(Wide_Character_Encoding_Method
));
1063 -- Start of processing for Output_Main_Program_Line
1066 if Nkind
(U
) = N_Subprogram_Body
1068 (Nkind
(U
) = N_Package_Body
1070 Nkind
(Original_Node
(U
)) in N_Subprogram_Instantiation
)
1072 -- If the unit is a subprogram instance, the entity for the
1073 -- subprogram is the alias of the visible entity, which is the
1074 -- related instance of the wrapper package. We retrieve the
1075 -- subprogram declaration of the desired entity.
1077 if Nkind
(U
) = N_Package_Body
then
1078 U
:= Parent
(Parent
(
1079 Alias
(Related_Instance
(Defining_Unit_Name
1080 (Specification
(Unit
(Library_Unit
(Parent
(U
)))))))));
1083 S
:= Specification
(U
);
1085 -- A generic subprogram is never a main program
1087 if Nkind
(U
) = N_Subprogram_Body
1088 and then Present
(Corresponding_Spec
(U
))
1090 Ekind_In
(Corresponding_Spec
(U
), E_Generic_Procedure
,
1095 elsif No
(Parameter_Specifications
(S
)) then
1096 if Nkind
(S
) = N_Procedure_Specification
then
1097 Write_Info_Initiate
('M');
1098 Write_Info_Str
(" P");
1103 Nam
: Node_Id
:= Defining_Unit_Name
(S
);
1106 -- If it is a child unit, get its simple name
1108 if Nkind
(Nam
) = N_Defining_Program_Unit_Name
then
1109 Nam
:= Defining_Identifier
(Nam
);
1112 if Is_Integer_Type
(Etype
(Nam
)) then
1113 Write_Info_Initiate
('M');
1114 Write_Info_Str
(" F");
1121 end Output_Main_Program_Line
;
1123 -- Write command argument ('A') lines
1125 for A
in 1 .. Compilation_Switches
.Last
loop
1126 Write_Info_Initiate
('A');
1127 Write_Info_Char
(' ');
1128 Write_Info_Str
(Compilation_Switches
.Table
(A
).all);
1129 Write_Info_Terminate
;
1132 -- Output parameters ('P') line
1134 Write_Info_Initiate
('P');
1136 if Compilation_Errors
then
1137 Write_Info_Str
(" CE");
1140 if Opt
.Detect_Blocking
then
1141 Write_Info_Str
(" DB");
1145 and then not Is_Predefined_File_Name
(Unit_File_Name
(Main_Unit
))
1147 if Locking_Policy
/= ' ' then
1148 Write_Info_Str
(" L");
1149 Write_Info_Char
(Locking_Policy
);
1152 if Queuing_Policy
/= ' ' then
1153 Write_Info_Str
(" Q");
1154 Write_Info_Char
(Queuing_Policy
);
1157 if Task_Dispatching_Policy
/= ' ' then
1158 Write_Info_Str
(" T");
1159 Write_Info_Char
(Task_Dispatching_Policy
);
1160 Write_Info_Char
(' ');
1164 if GNATprove_Mode
then
1165 Write_Info_Str
(" GP");
1168 if Partition_Elaboration_Policy
/= ' ' then
1169 Write_Info_Str
(" E");
1170 Write_Info_Char
(Partition_Elaboration_Policy
);
1174 Write_Info_Str
(" NO");
1177 if No_Run_Time_Mode
then
1178 Write_Info_Str
(" NR");
1181 if Normalize_Scalars
then
1182 Write_Info_Str
(" NS");
1185 if Default_SSO_Config
/= ' ' then
1186 Write_Info_Str
(" O");
1187 Write_Info_Char
(Default_SSO_Config
);
1190 if Sec_Stack_Used
then
1191 Write_Info_Str
(" SS");
1194 if Unreserve_All_Interrupts
then
1195 Write_Info_Str
(" UA");
1198 if Front_End_Exceptions
then
1199 Write_Info_Str
(" FX");
1202 if ZCX_Exceptions
then
1203 Write_Info_Str
(" ZX");
1208 -- Before outputting the restrictions line, update the setting of
1209 -- the No_Elaboration_Code flag. Violations of this restriction
1210 -- cannot be detected until after the backend has been called since
1211 -- it is the backend that sets this flag. We have to check all units
1212 -- for which we have generated code
1214 for Unit
in Units
.First
.. Last_Unit
loop
1215 if Units
.Table
(Unit
).Generate_Code
or else Unit
= Main_Unit
then
1216 if not Has_No_Elaboration_Code
(Cunit
(Unit
)) then
1217 Main_Restrictions
.Violated
(No_Elaboration_Code
) := True;
1222 -- Positional case (only if debug flag -gnatd.R is set)
1224 if Debug_Flag_Dot_RR
then
1226 -- Output first restrictions line
1228 Write_Info_Initiate
('R');
1229 Write_Info_Char
(' ');
1231 -- First the information for the boolean restrictions
1233 for R
in All_Boolean_Restrictions
loop
1234 if Main_Restrictions
.Set
(R
)
1235 and then not Restriction_Warnings
(R
)
1237 Write_Info_Char
('r');
1238 elsif Main_Restrictions
.Violated
(R
) then
1239 Write_Info_Char
('v');
1241 Write_Info_Char
('n');
1245 -- And now the information for the parameter restrictions
1247 for RP
in All_Parameter_Restrictions
loop
1248 if Main_Restrictions
.Set
(RP
)
1249 and then not Restriction_Warnings
(RP
)
1251 Write_Info_Char
('r');
1252 Write_Info_Nat
(Nat
(Main_Restrictions
.Value
(RP
)));
1254 Write_Info_Char
('n');
1257 if not Main_Restrictions
.Violated
(RP
)
1258 or else RP
not in Checked_Parameter_Restrictions
1260 Write_Info_Char
('n');
1262 Write_Info_Char
('v');
1263 Write_Info_Nat
(Nat
(Main_Restrictions
.Count
(RP
)));
1265 if Main_Restrictions
.Unknown
(RP
) then
1266 Write_Info_Char
('+');
1273 -- Named case (if debug flag -gnatd.R is not set)
1280 -- Write RN header line with preceding blank line
1283 Write_Info_Initiate
('R');
1284 Write_Info_Char
('N');
1287 -- First the lines for the boolean restrictions
1289 for R
in All_Boolean_Restrictions
loop
1290 if Main_Restrictions
.Set
(R
)
1291 and then not Restriction_Warnings
(R
)
1294 elsif Main_Restrictions
.Violated
(R
) then
1300 Write_Info_Initiate
('R');
1301 Write_Info_Char
(C
);
1302 Write_Info_Char
(' ');
1303 Write_Info_Str
(All_Boolean_Restrictions
'Image (R
));
1311 -- And now the lines for the parameter restrictions
1313 for RP
in All_Parameter_Restrictions
loop
1314 if Main_Restrictions
.Set
(RP
)
1315 and then not Restriction_Warnings
(RP
)
1317 Write_Info_Initiate
('R');
1318 Write_Info_Str
("R ");
1319 Write_Info_Str
(All_Parameter_Restrictions
'Image (RP
));
1320 Write_Info_Char
('=');
1321 Write_Info_Nat
(Nat
(Main_Restrictions
.Value
(RP
)));
1325 if not Main_Restrictions
.Violated
(RP
)
1326 or else RP
not in Checked_Parameter_Restrictions
1330 Write_Info_Initiate
('R');
1331 Write_Info_Str
("V ");
1332 Write_Info_Str
(All_Parameter_Restrictions
'Image (RP
));
1333 Write_Info_Char
('=');
1334 Write_Info_Nat
(Nat
(Main_Restrictions
.Count
(RP
)));
1336 if Main_Restrictions
.Unknown
(RP
) then
1337 Write_Info_Char
('+');
1345 -- Output R lines for No_Dependence entries
1347 for J
in No_Dependences
.First
.. No_Dependences
.Last
loop
1348 if In_Extended_Main_Source_Unit
(No_Dependences
.Table
(J
).Unit
)
1349 and then not No_Dependences
.Table
(J
).Warn
1351 Write_Info_Initiate
('R');
1352 Write_Info_Char
(' ');
1353 Write_Unit_Name
(No_Dependences
.Table
(J
).Unit
);
1358 -- Output interrupt state lines
1360 for J
in Interrupt_States
.First
.. Interrupt_States
.Last
loop
1361 Write_Info_Initiate
('I');
1362 Write_Info_Char
(' ');
1363 Write_Info_Nat
(Interrupt_States
.Table
(J
).Interrupt_Number
);
1364 Write_Info_Char
(' ');
1365 Write_Info_Char
(Interrupt_States
.Table
(J
).Interrupt_State
);
1366 Write_Info_Char
(' ');
1368 (Nat
(Get_Logical_Line_Number
1369 (Interrupt_States
.Table
(J
).Pragma_Loc
)));
1373 -- Output priority specific dispatching lines
1375 for J
in Specific_Dispatching
.First
.. Specific_Dispatching
.Last
loop
1376 Write_Info_Initiate
('S');
1377 Write_Info_Char
(' ');
1378 Write_Info_Char
(Specific_Dispatching
.Table
(J
).Dispatching_Policy
);
1379 Write_Info_Char
(' ');
1380 Write_Info_Nat
(Specific_Dispatching
.Table
(J
).First_Priority
);
1381 Write_Info_Char
(' ');
1382 Write_Info_Nat
(Specific_Dispatching
.Table
(J
).Last_Priority
);
1383 Write_Info_Char
(' ');
1385 (Nat
(Get_Logical_Line_Number
1386 (Specific_Dispatching
.Table
(J
).Pragma_Loc
)));
1390 -- Loop through file table to output information for all units for which
1391 -- we have generated code, as marked by the Generate_Code flag.
1393 for Unit
in Units
.First
.. Last_Unit
loop
1394 if Units
.Table
(Unit
).Generate_Code
1395 or else Unit
= Main_Unit
1397 Write_Info_EOL
; -- blank line
1398 Write_Unit_Information
(Unit
);
1402 Write_Info_EOL
; -- blank line
1404 -- Output external version reference lines
1406 for J
in 1 .. Version_Ref
.Last
loop
1407 Write_Info_Initiate
('E');
1408 Write_Info_Char
(' ');
1410 for K
in 1 .. String_Length
(Version_Ref
.Table
(J
)) loop
1411 Write_Info_Char_Code
(Get_String_Char
(Version_Ref
.Table
(J
), K
));
1417 -- Prepare to output the source dependency lines
1420 Unum
: Unit_Number_Type
;
1421 -- Number of unit being output
1423 Sind
: Source_File_Index
;
1424 -- Index of corresponding source file
1426 Fname
: File_Name_Type
;
1429 for J
in 1 .. Num_Sdep
loop
1430 Unum
:= Sdep_Table
(J
);
1431 Units
.Table
(Unum
).Dependency_Num
:= J
;
1432 Sind
:= Units
.Table
(Unum
).Source_Index
;
1434 -- The dependency table also contains units that appear in the
1435 -- context of a unit loaded through a limited_with clause. These
1436 -- units are never analyzed, and thus the main unit does not
1437 -- really have a dependency on them.
1439 if Present
(Cunit_Entity
(Unum
))
1440 and then Ekind
(Cunit_Entity
(Unum
)) = E_Void
1445 Write_Info_Initiate
('D');
1446 Write_Info_Char
(' ');
1448 -- Normal case of a unit entry with a source index
1450 if Sind
/= No_Source_File
then
1451 Fname
:= File_Name
(Sind
);
1453 -- Ensure that on platforms where the file names are not case
1454 -- sensitive, the recorded file name is in lower case.
1456 if not File_Names_Case_Sensitive
then
1457 Get_Name_String
(Fname
);
1458 To_Lower
(Name_Buffer
(1 .. Name_Len
));
1462 Write_Info_Name_May_Be_Quoted
(Fname
);
1463 Write_Info_Tab
(25);
1464 Write_Info_Str
(String (Time_Stamp
(Sind
)));
1465 Write_Info_Char
(' ');
1466 Write_Info_Str
(Get_Hex_String
(Source_Checksum
(Sind
)));
1468 -- If the dependency comes from a limited_with clause,
1469 -- record limited_checksum.
1470 -- Disable for now, until full checksum changes are checked.
1472 -- if Present (Cunit_Entity (Unum))
1473 -- and then From_Limited_With (Cunit_Entity (Unum))
1475 -- Write_Info_Char (' ');
1476 -- Write_Info_Char ('Y');
1477 -- Write_Info_Str (Get_Hex_String (Limited_Chk_Sum (Sind)));
1480 -- If subunit, add unit name, omitting the %b at the end
1482 if Present
(Cunit
(Unum
)) then
1483 Get_Decoded_Name_String
(Unit_Name
(Unum
));
1484 Write_Info_Char
(' ');
1486 if Nkind
(Unit
(Cunit
(Unum
))) = N_Subunit
then
1487 Write_Info_Str
(Name_Buffer
(1 .. Name_Len
- 2));
1489 Write_Info_Str
(Name_Buffer
(1 .. Name_Len
));
1493 -- If Source_Reference pragma used, output information
1495 if Num_SRef_Pragmas
(Sind
) > 0 then
1496 Write_Info_Char
(' ');
1498 if Num_SRef_Pragmas
(Sind
) = 1 then
1499 Write_Info_Nat
(Int
(First_Mapped_Line
(Sind
)));
1504 Write_Info_Char
(':');
1505 Write_Info_Name
(Reference_Name
(Sind
));
1508 -- Case where there is no source index (happens for missing
1509 -- files). In this case we write a dummy time stamp.
1512 Write_Info_Name
(Unit_File_Name
(Unum
));
1513 Write_Info_Tab
(25);
1514 Write_Info_Str
(String (Dummy_Time_Stamp
));
1515 Write_Info_Char
(' ');
1516 Write_Info_Str
(Get_Hex_String
(0));
1526 -- Output cross-references
1528 if Opt
.Xref_Active
then
1532 -- Output SCO information if present
1534 if Generate_SCO
then
1535 SCO_Record_Filtered
;
1539 -- Output SPARK cross-reference information if needed
1541 if Opt
.Xref_Active
and then GNATprove_Mode
then
1542 SPARK_Specific
.Collect_SPARK_Xrefs
(Sdep_Table
=> Sdep_Table
,
1543 Num_Sdep
=> Num_Sdep
);
1544 SPARK_Specific
.Output_SPARK_Xrefs
;
1547 -- Output final blank line and we are done. This final blank line is
1548 -- probably junk, but we don't feel like making an incompatible change.
1550 Write_Info_Terminate
;
1551 Close_Output_Library_Info
;
1554 ---------------------
1555 -- Write_Unit_Name --
1556 ---------------------
1558 procedure Write_Unit_Name
(N
: Node_Id
) is
1560 if Nkind
(N
) = N_Identifier
then
1561 Write_Info_Name
(Chars
(N
));
1564 pragma Assert
(Nkind
(N
) = N_Selected_Component
);
1565 Write_Unit_Name
(Prefix
(N
));
1566 Write_Info_Char
('.');
1567 Write_Unit_Name
(Selector_Name
(N
));
1569 end Write_Unit_Name
;