1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2010, 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 ------------------------------------------------------------------------------
26 -- This package defines the internal data structures used for representation
27 -- of Ada Library Information (ALI) acquired from the ALI files generated
30 with Casing; use Casing;
31 with Gnatvsn; use Gnatvsn;
32 with Namet; use Namet;
33 with Rident; use Rident;
35 with Types; use Types;
37 with GNAT.HTable; use GNAT.HTable;
45 -- The various entries are stored in tables with distinct subscript ranges.
46 -- The following type definitions show the ranges used for the subscripts
47 -- (Id values) for the various tables.
49 type ALI_Id is range 0 .. 999_999;
50 -- Id values used for ALIs table entries
52 type Unit_Id is range 1_000_000 .. 1_999_999;
53 -- Id values used for Unit table entries
55 type With_Id is range 2_000_000 .. 2_999_999;
56 -- Id values used for Withs table entries
58 type Arg_Id is range 3_000_000 .. 3_999_999;
59 -- Id values used for argument table entries
61 type Sdep_Id is range 4_000_000 .. 4_999_999;
62 -- Id values used for Sdep table entries
64 type Source_Id is range 5_000_000 .. 5_999_999;
65 -- Id values used for Source table entries
67 type Interrupt_State_Id is range 6_000_000 .. 6_999_999;
68 -- Id values used for Interrupt_State table entries
70 type Priority_Specific_Dispatching_Id is range 7_000_000 .. 7_999_999;
71 -- Id values used for Priority_Specific_Dispatching table entries
77 -- Each ALI file read generates an entry in the ALIs table
79 No_ALI_Id : constant ALI_Id := ALI_Id'First;
80 -- Special value indicating no ALI entry
82 First_ALI_Entry : constant ALI_Id := No_ALI_Id + 1;
83 -- Id of first actual entry in table
85 type Main_Program_Type is (None, Proc, Func);
86 -- Indicator of whether unit can be used as main program
88 type ALIs_Record is record
90 Afile : File_Name_Type;
93 Ofile_Full_Name : File_Name_Type;
94 -- Full name of object file corresponding to the ALI file
96 Sfile : File_Name_Type;
97 -- Name of source file that generates this ALI file (which is equal
98 -- to the name of the source file in the first unit table entry for
99 -- this ALI file, since the body if present is always first).
101 Ver : String (1 .. Ver_Len_Max);
102 -- Value of library version (V line in ALI file). Not set if
103 -- V lines are ignored as a result of the Ignore_Lines parameter.
106 -- Length of characters stored in Ver. Not set if V lines are ignored as
107 -- a result of the Ignore_Lines parameter.
109 SAL_Interface : Boolean;
110 -- Set True when this is an interface to a standalone library
112 First_Unit : Unit_Id;
113 -- Id of first Unit table entry for this file
116 -- Id of last Unit table entry for this file
118 First_Sdep : Sdep_Id;
119 -- Id of first Sdep table entry for this file
122 -- Id of last Sdep table entry for this file
124 Main_Program : Main_Program_Type;
125 -- Indicator of whether first unit can be used as main program. Not set
126 -- if 'M' appears in Ignore_Lines.
129 -- Indicates priority value if Main_Program field indicates that this
130 -- can be a main program. A value of -1 (No_Main_Priority) indicates
131 -- that no parameter was found, or no M line was present. Not set if
132 -- 'M' appears in Ignore_Lines.
134 Time_Slice_Value : Int;
135 -- Indicates value of time slice parameter from T=xxx on main program
136 -- line. A value of -1 indicates that no T=xxx parameter was found, or
137 -- no M line was present. Not set if 'M' appears in Ignore_Lines.
139 Allocator_In_Body : Boolean;
140 -- Set True if an AB switch appears on the main program line. False
141 -- if no M line, or AB not present, or 'M appears in Ignore_Lines.
143 WC_Encoding : Character;
144 -- Wide character encoding if main procedure. Otherwise not relevant.
145 -- Not set if 'M' appears in Ignore_Lines.
147 Locking_Policy : Character;
148 -- Indicates locking policy for units in this file. Space means tasking
149 -- was not used, or that no Locking_Policy pragma was present or that
150 -- this is a language defined unit. Otherwise set to first character
151 -- (upper case) of policy name. Not set if 'P' appears in Ignore_Lines.
153 Queuing_Policy : Character;
154 -- Indicates queuing policy for units in this file. Space means tasking
155 -- was not used, or that no Queuing_Policy pragma was present or that
156 -- this is a language defined unit. Otherwise set to first character
157 -- (upper case) of policy name. Not set if 'P' appears in Ignore_Lines.
159 Task_Dispatching_Policy : Character;
160 -- Indicates task dispatching policy for units in this file. Space means
161 -- tasking was not used, or that no Task_Dispatching_Policy pragma was
162 -- present or that this is a language defined unit. Otherwise set to
163 -- first character (upper case) of policy name. Not set if 'P' appears
166 Compile_Errors : Boolean;
167 -- Set to True if compile errors for unit. Note that No_Object will
168 -- always be set as well in this case. Not set if 'P' appears in
171 Float_Format : Character;
172 -- Set to float format (set to I if no float-format given). Not set if
173 -- 'P' appears in Ignore_Lines.
176 -- Set to True if no object file generated. Not set if 'P' appears in
179 Normalize_Scalars : Boolean;
180 -- Set to True if file was compiled with Normalize_Scalars. Not set if
181 -- 'P' appears in Ignore_Lines.
183 Unit_Exception_Table : Boolean;
184 -- Set to True if unit exception table pointer generated. Not set if 'P'
185 -- appears in Ignore_Lines.
187 Zero_Cost_Exceptions : Boolean;
188 -- Set to True if file was compiled with zero cost exceptions. Not set
189 -- if 'P' appears in Ignore_Lines.
191 Restrictions : Restrictions_Info;
192 -- Restrictions information reconstructed from R lines
194 First_Interrupt_State : Interrupt_State_Id;
195 Last_Interrupt_State : Interrupt_State_Id'Base;
196 -- These point to the first and last entries in the interrupt state
197 -- table for this unit. If no entries, then Last_Interrupt_State =
198 -- First_Interrupt_State - 1 (that's why the 'Base reference is there,
199 -- it can be one less than the lower bound of the subtype). Not set if
200 -- 'I' appears in Ignore_Lines
202 First_Specific_Dispatching : Priority_Specific_Dispatching_Id;
203 Last_Specific_Dispatching : Priority_Specific_Dispatching_Id'Base;
204 -- These point to the first and last entries in the priority specific
205 -- dispatching table for this unit. If there are no entries, then
206 -- Last_Specific_Dispatching = First_Specific_Dispatching - 1. That
207 -- is why the 'Base reference is there, it can be one less than the
208 -- lower bound of the subtype. Not set if 'S' appears in Ignore_Lines.
212 No_Main_Priority : constant Int := -1;
213 -- Code for no main priority set
215 package ALIs is new Table.Table (
216 Table_Component_Type => ALIs_Record,
217 Table_Index_Type => ALI_Id,
218 Table_Low_Bound => First_ALI_Entry,
219 Table_Initial => 500,
220 Table_Increment => 200,
221 Table_Name => "ALIs");
227 -- Each unit within an ALI file generates an entry in the unit table
229 No_Unit_Id : constant Unit_Id := Unit_Id'First;
230 -- Special value indicating no unit table entry
232 First_Unit_Entry : constant Unit_Id := No_Unit_Id + 1;
233 -- Id of first actual entry in table
235 type Unit_Type is (Is_Spec, Is_Body, Is_Spec_Only, Is_Body_Only);
236 -- Indicates type of entry, if both body and spec appear in the ALI file,
237 -- then the first unit is marked Is_Body, and the second is marked Is_Spec.
238 -- If only a spec appears, then it is marked as Is_Spec_Only, and if only
239 -- a body appears, then it is marked Is_Body_Only).
241 subtype Version_String is String (1 .. 8);
242 -- Version string, taken from unit record
244 type Unit_Record is record
247 -- Corresponding ALI entry
249 Uname : Unit_Name_Type;
252 Sfile : File_Name_Type;
253 -- Name of source file
256 -- Indicates presence of PR parameter for a preelaborated package
259 -- Indicates presence of NE parameter for a unit that has does not
260 -- have an elaboration routine (since it has no elaboration code).
263 -- Indicates presence of PU parameter for a package having pragma Pure
265 Dynamic_Elab : Boolean;
266 -- Set to True if the unit was compiled with dynamic elaboration checks
267 -- (i.e. either -gnatE or pragma Elaboration_Checks (RM) was used to
268 -- compile the unit).
270 Elaborate_Body : Boolean;
271 -- Indicates presence of EB parameter for a package which has a pragma
272 -- Elaborate_Body, and also for generic package instantiations.
274 Set_Elab_Entity : Boolean;
275 -- Indicates presence of EE parameter for a unit which has an
276 -- elaboration entity which must be set true as part of the
277 -- elaboration of the entity.
280 -- Indicates presence of RA parameter for a package that declares at
281 -- least one Remote Access to Class_Wide (RACW) object.
283 Remote_Types : Boolean;
284 -- Indicates presence of RT parameter for a package which has a
285 -- pragma Remote_Types.
287 Shared_Passive : Boolean;
288 -- Indicates presence of SP parameter for a package which has a pragma
292 -- Indicates presence of RC parameter for a package which has a pragma
293 -- Remote_Call_Interface.
295 Predefined : Boolean;
296 -- Indicates if unit is language predefined (or a child of such a unit)
299 -- Indicates if unit is an internal unit (or a child of such a unit)
301 First_With : With_Id;
302 -- Id of first withs table entry for this file
305 -- Id of last withs table entry for this file
308 -- Id of first args table entry for this file
311 -- Id of last args table entry for this file
316 Is_Generic : Boolean;
317 -- True for generic unit (i.e. a generic declaration, or a generic
318 -- body). False for a non-generic unit.
320 Unit_Kind : Character;
321 -- Indicates the nature of the unit. 'p' for Packages and 's' for
324 Version : Version_String;
327 Icasing : Casing_Type;
328 -- Indicates casing of identifiers in source file for this unit. This
329 -- is used for informational output, and also for constructing the main
330 -- unit if it is being built in Ada.
332 Kcasing : Casing_Type;
333 -- Indicates casing of keywords in source file for this unit. This is
334 -- used for informational output, and also for constructing the main
335 -- unit if it is being built in Ada.
337 Elab_Position : aliased Natural;
338 -- Initialized to zero. Set non-zero when a unit is chosen and
339 -- placed in the elaboration order. The value represents the
340 -- ordinal position in the elaboration order.
342 Init_Scalars : Boolean;
343 -- Set True if IS qualifier appears in ALI file, indicating that
344 -- an Initialize_Scalars pragma applies to the unit.
346 SAL_Interface : Boolean;
347 -- Set True when this is an interface to a standalone library
349 Directly_Scanned : Boolean;
350 -- True iff it is a unit from an ALI file specified to gnatbind
352 Body_Needed_For_SAL : Boolean;
353 -- Indicates that the source for the body of the unit (subprogram,
354 -- package, or generic unit) must be included in a standalone library.
356 Elaborate_Body_Desirable : Boolean;
357 -- Indicates that the front end elaboration circuitry decided that it
358 -- would be a good idea if this package had Elaborate_Body. The binder
359 -- will attempt, but does not promise, to place the elaboration call
360 -- for the body right after the call for the spec, or at least as close
361 -- together as possible.
363 Optimize_Alignment : Character;
364 -- Optimize_Alignment setting. Set to L/S/T/O for OL/OS/OT/OO present
368 package Units is new Table.Table (
369 Table_Component_Type => Unit_Record,
370 Table_Index_Type => Unit_Id,
371 Table_Low_Bound => First_Unit_Entry,
372 Table_Initial => 100,
373 Table_Increment => 200,
374 Table_Name => "Unit");
376 ---------------------------
377 -- Interrupt State Table --
378 ---------------------------
380 -- An entry is made in this table for each I (interrupt state) line
381 -- encountered in the input ALI file. The First/Last_Interrupt_Id
382 -- fields of the ALI file entry show the range of entries defined
383 -- within a particular ALI file.
385 type Interrupt_State_Record is record
387 -- Id from interrupt state entry
389 Interrupt_State : Character;
390 -- State from interrupt state entry ('u'/'r'/'s')
392 IS_Pragma_Line : Nat;
393 -- Line number of Interrupt_State pragma
396 package Interrupt_States is new Table.Table (
397 Table_Component_Type => Interrupt_State_Record,
398 Table_Index_Type => Interrupt_State_Id'Base,
399 Table_Low_Bound => Interrupt_State_Id'First,
400 Table_Initial => 100,
401 Table_Increment => 200,
402 Table_Name => "Interrupt_States");
404 -----------------------------------------
405 -- Priority Specific Dispatching Table --
406 -----------------------------------------
408 -- An entry is made in this table for each S (priority specific
409 -- dispatching) line encountered in the input ALI file. The
410 -- First/Last_Specific_Dispatching_Id fields of the ALI file
411 -- entry show the range of entries defined within a particular
414 type Specific_Dispatching_Record is record
415 Dispatching_Policy : Character;
416 -- First character (upper case) of the corresponding policy name
418 First_Priority : Nat;
419 -- Lower bound of the priority range to which the specified dispatching
423 -- Upper bound of the priority range to which the specified dispatching
426 PSD_Pragma_Line : Nat;
427 -- Line number of Priority_Specific_Dispatching pragma
430 package Specific_Dispatching is new Table.Table (
431 Table_Component_Type => Specific_Dispatching_Record,
432 Table_Index_Type => Priority_Specific_Dispatching_Id'Base,
433 Table_Low_Bound => Priority_Specific_Dispatching_Id'First,
434 Table_Initial => 100,
435 Table_Increment => 200,
436 Table_Name => "Priority_Specific_Dispatching");
442 -- These switches record status information about ali files that
443 -- have been read, for quick reference without searching tables.
445 -- Note: a switch will be left set at its default value if the line
446 -- which might otherwise set it is ignored (from Ignore_Lines).
448 Dynamic_Elaboration_Checks_Specified : Boolean := False;
449 -- Set to False by Initialize_ALI. Set to True if Scan_ALI reads
450 -- a unit for which dynamic elaboration checking is enabled.
452 Float_Format_Specified : Character := ' ';
453 -- Set to blank by Initialize_ALI. Set to appropriate float format
454 -- character (V or I, see Opt.Float_Format) if an ali file that
455 -- is read contains an F line setting the floating point format.
457 Initialize_Scalars_Used : Boolean := False;
458 -- Set True if an ali file contains the Initialize_Scalars flag
460 Locking_Policy_Specified : Character := ' ';
461 -- Set to blank by Initialize_ALI. Set to the appropriate locking policy
462 -- character if an ali file contains a P line setting the locking policy.
464 No_Normalize_Scalars_Specified : Boolean := False;
465 -- Set to False by Initialize_ALI. Set to True if an ali file indicates
466 -- that the file was compiled without normalize scalars.
468 No_Object_Specified : Boolean := False;
469 -- Set to False by Initialize_ALI. Set to True if an ali file contains
470 -- the No_Object flag.
472 Normalize_Scalars_Specified : Boolean := False;
473 -- Set to False by Initialize_ALI. Set to True if an ali file indicates
474 -- that the file was compiled in Normalize_Scalars mode.
476 Queuing_Policy_Specified : Character := ' ';
477 -- Set to blank by Initialize_ALI. Set to the appropriate queuing policy
478 -- character if an ali file contains a P line setting the queuing policy.
480 Cumulative_Restrictions : Restrictions_Info := No_Restrictions;
481 -- This variable records the cumulative contributions of R lines in all
482 -- ali files, showing whether a restriction pragma exists anywhere, and
483 -- accumulating the aggregate knowledge of violations.
485 Stack_Check_Switch_Set : Boolean := False;
486 -- Set to True if at least one ALI file contains '-fstack-check' in its
489 Static_Elaboration_Model_Used : Boolean := False;
490 -- Set to False by Initialize_ALI. Set to True if any ALI file for a
491 -- non-internal unit compiled with the static elaboration model is
494 Task_Dispatching_Policy_Specified : Character := ' ';
495 -- Set to blank by Initialize_ALI. Set to the appropriate task dispatching
496 -- policy character if an ali file contains a P line setting the
497 -- task dispatching policy.
499 Unreserve_All_Interrupts_Specified : Boolean := False;
500 -- Set to False by Initialize_ALI. Set to True if an ali file is read that
501 -- has P line specifying unreserve all interrupts mode.
503 Zero_Cost_Exceptions_Specified : Boolean := False;
504 -- Set to False by Initialize_ALI. Set to True if an ali file is read that
505 -- has a P line specifying the generation of zero cost exceptions.
511 -- Each With line (W line) in an ALI file generates a Withs table entry
513 -- Note: there will be no entries in this table if 'W' lines are ignored
515 No_With_Id : constant With_Id := With_Id'First;
516 -- Special value indicating no withs table entry
518 First_With_Entry : constant With_Id := No_With_Id + 1;
519 -- Id of first actual entry in table
521 type With_Record is record
523 Uname : Unit_Name_Type;
526 Sfile : File_Name_Type;
527 -- Name of source file, set to No_File in generic case
529 Afile : File_Name_Type;
530 -- Name of ALI file, set to No_File in generic case
533 -- Indicates presence of E parameter
535 Elaborate_All : Boolean;
536 -- Indicates presence of EA parameter
538 Elab_All_Desirable : Boolean;
539 -- Indicates presence of AD parameter
541 Elab_Desirable : Boolean;
542 -- Indicates presence of ED parameter
544 SAL_Interface : Boolean := False;
545 -- True if the Unit is an Interface of a Stand-Alone Library
547 Limited_With : Boolean := False;
548 -- True if unit is named in a limited_with_clause
551 package Withs is new Table.Table (
552 Table_Component_Type => With_Record,
553 Table_Index_Type => With_Id,
554 Table_Low_Bound => First_With_Entry,
555 Table_Initial => 5000,
556 Table_Increment => 200,
557 Table_Name => "Withs");
559 ---------------------
560 -- Arguments Table --
561 ---------------------
563 -- Each Arg line (A line) in an ALI file generates an Args table entry
565 -- Note: there will be no entries in this table if 'A' lines are ignored
567 No_Arg_Id : constant Arg_Id := Arg_Id'First;
568 -- Special value indicating no args table entry
570 First_Arg_Entry : constant Arg_Id := No_Arg_Id + 1;
571 -- Id of first actual entry in table
573 package Args is new Table.Table (
574 Table_Component_Type => String_Ptr,
575 Table_Index_Type => Arg_Id,
576 Table_Low_Bound => First_Arg_Entry,
577 Table_Initial => 1000,
578 Table_Increment => 100,
579 Table_Name => "Args");
581 --------------------------
582 -- Linker_Options Table --
583 --------------------------
585 -- If an ALI file has one of more Linker_Options lines, then a single
586 -- entry is made in this table. If more than one Linker_Options lines
587 -- appears in a given ALI file, then the arguments are concatenated
588 -- to form the entry in this table, using a NUL character as the
589 -- separator, and a final NUL character is appended to the end.
591 -- Note: there will be no entries in this table if 'L' lines are ignored
593 type Linker_Option_Record is record
595 -- Name entry containing concatenated list of Linker_Options
596 -- arguments separated by NUL and ended by NUL as described above.
599 -- Unit_Id for the entry
601 Internal_File : Boolean;
602 -- Set True if the linker options are from an internal file. This is
603 -- used to insert certain standard entries after all the user entries
604 -- but before the entries from the run-time.
606 Original_Pos : Positive;
607 -- Keep track of original position in the linker options table. This
608 -- is used to implement a stable sort when we sort the linker options
612 -- The indexes of active entries in this table range from 1 to the
613 -- value of Linker_Options.Last. The zero'th element is for sort call.
615 package Linker_Options is new Table.Table (
616 Table_Component_Type => Linker_Option_Record,
617 Table_Index_Type => Integer,
618 Table_Low_Bound => 0,
619 Table_Initial => 200,
620 Table_Increment => 400,
621 Table_Name => "Linker_Options");
627 -- The notes table records entries from N lines
629 type Notes_Record is record
630 Pragma_Type : Character;
631 -- 'A', 'C', 'I', 'S', 'T' for Annotate/Comment/Ident/Subtitle/Title
634 -- Line number of pragma
637 -- Column number of pragma
640 -- Unit_Id for the entry
642 Pragma_Args : Name_Id;
643 -- Pragma arguments. No_Name if no arguments, otherwise a single
644 -- name table entry consisting of all the characters on the notes
645 -- line from the first non-blank character following the source
646 -- location to the last character on the line.
649 -- The indexes of active entries in this table range from 1 to the
650 -- value of Linker_Options.Last. The zero'th element is for convenience
651 -- if the table needs to be sorted.
653 package Notes is new Table.Table (
654 Table_Component_Type => Notes_Record,
655 Table_Index_Type => Integer,
656 Table_Low_Bound => 0,
657 Table_Initial => 200,
658 Table_Increment => 400,
659 Table_Name => "Notes");
661 -------------------------------------------
662 -- External Version Reference Hash Table --
663 -------------------------------------------
665 -- This hash table keeps track of external version reference strings
666 -- as read from E lines in the ali file. The stored values do not
667 -- include the terminating quote characters.
669 -- Note: there will be no entries in this table if 'E' lines are ignored
671 type Vindex is range 0 .. 98;
672 -- Type to define range of headers
674 function SHash (S : String_Ptr) return Vindex;
675 -- Hash function for this table
677 function SEq (F1, F2 : String_Ptr) return Boolean;
678 -- Equality function for this table
680 package Version_Ref is new Simple_HTable (
681 Header_Num => Vindex,
688 -------------------------
689 -- No_Dependency Table --
690 -------------------------
692 -- Each R line for a No_Dependency Restriction generates an entry in
693 -- this No_Dependency table.
695 type No_Dep_Record is record
697 -- ALI File containing the entry
699 No_Dep_Unit : Name_Id;
700 -- Id for names table entry including entire name, including periods
703 package No_Deps is new Table.Table (
704 Table_Component_Type => No_Dep_Record,
705 Table_Index_Type => Integer,
706 Table_Low_Bound => 0,
707 Table_Initial => 200,
708 Table_Increment => 400,
709 Table_Name => "No_Deps");
711 ------------------------------------
712 -- Sdep (Source Dependency) Table --
713 ------------------------------------
715 -- Each source dependency (D line) in an ALI file generates an entry in the
718 -- Note: there will be no entries in this table if 'D' lines are ignored
720 No_Sdep_Id : constant Sdep_Id := Sdep_Id'First;
721 -- Special value indicating no Sdep table entry
723 First_Sdep_Entry : Sdep_Id := No_Sdep_Id + 1;
724 -- Id of first Sdep entry for current ali file. This is initialized to the
725 -- first Sdep entry in the table, and then incremented appropriately as
726 -- successive ALI files are scanned.
728 type Sdep_Record is record
730 Sfile : File_Name_Type;
731 -- Name of source file
733 Stamp : Time_Stamp_Type;
734 -- Time stamp value. Note that this will be all zero characters for the
735 -- dummy entries for missing or non-dependent files.
738 -- Checksum value. Note that this will be all zero characters for the
739 -- dummy entries for missing or non-dependent files
741 Dummy_Entry : Boolean;
742 -- Set True for dummy entries that correspond to missing files or files
743 -- where no dependency relationship exists.
745 Subunit_Name : Name_Id;
746 -- Name_Id for subunit name if present, else No_Name
748 Rfile : File_Name_Type;
749 -- Reference file name. Same as Sfile unless a Source_Reference pragma
750 -- was used, in which case it reflects the name used in the pragma.
753 -- Starting line number in file. Always 1, unless a Source_Reference
754 -- pragma was used, in which case it reflects the line number value
755 -- given in the pragma.
759 package Sdep is new Table.Table (
760 Table_Component_Type => Sdep_Record,
761 Table_Index_Type => Sdep_Id,
762 Table_Low_Bound => First_Sdep_Entry,
763 Table_Initial => 5000,
764 Table_Increment => 200,
765 Table_Name => "Sdep");
767 ----------------------------
768 -- Use of Name Table Info --
769 ----------------------------
771 -- All unit names and file names are entered into the Names table. The Info
772 -- fields of these entries are used as follows:
774 -- Unit name Info field has Unit_Id of unit table entry
775 -- ALI file name Info field has ALI_Id of ALI table entry
776 -- Source file name Info field has Source_Id of source table entry
778 --------------------------
779 -- Cross-Reference Data --
780 --------------------------
782 -- The following table records cross-reference sections, there is one entry
783 -- for each X header line in the ALI file for an xref section.
785 -- Note: there will be no entries in this table if 'X' lines are ignored
787 type Xref_Section_Record is record
789 -- Dependency number for file (entry in Sdep.Table)
791 File_Name : File_Name_Type;
795 -- First entry in Xref_Entity table
798 -- Last entry in Xref_Entity table
801 package Xref_Section is new Table.Table (
802 Table_Component_Type => Xref_Section_Record,
803 Table_Index_Type => Nat,
804 Table_Low_Bound => 1,
806 Table_Increment => 300,
807 Table_Name => "Xref_Section");
809 -- The following is used to indicate whether a typeref field is present
810 -- for the entity, and if so what kind of typeref field.
813 Tref_None, -- No typeref present
814 Tref_Access, -- Access type typeref (points to designated type)
815 Tref_Derived, -- Derived type typeref (points to parent type)
816 Tref_Type); -- All other cases
818 type Visibility_Kind is
819 (Global, -- Library level entity
820 Static, -- Static C/C++ entity
821 Other); -- Local and other entity
823 -- The following table records entities for which xrefs are recorded
825 type Xref_Entity_Record is record
827 -- Line number of definition
830 -- Set to the identification character for the entity. See section
831 -- "Cross-Reference Entity Identifiers" in lib-xref.ads for details.
834 -- Column number of definition
836 Visibility : Visibility_Kind;
837 -- Visiblity of entity
842 Iref_File_Num : Sdep_Id;
843 -- This field is set to the dependency reference for the file containing
844 -- the generic entity that this one instantiates, or to No_Sdep_Id if
845 -- the current entity is not an instantiation
848 -- This field is set to the line number in Iref_File_Num of the generic
849 -- entity that this one instantiates, or to zero if the current entity
850 -- is not an instantiation.
853 -- This field is set to the line number of a renaming reference if
854 -- one is present, or to zero if no renaming reference is present
857 -- This field is set to the column number of a renaming reference
858 -- if one is present, or to zero if no renaming reference is present.
861 -- Indicates if a typeref is present, and if so what kind. Set to
862 -- Tref_None if no typeref field is present.
864 Tref_File_Num : Sdep_Id;
865 -- This field is set to No_Sdep_Id if no typeref is present, or
866 -- if the typeref refers to an entity in standard. Otherwise it
867 -- it is the dependency reference for the file containing the
868 -- declaration of the typeref entity.
871 -- This field is set to zero if no typeref is present, or if the
872 -- typeref refers to an entity in standard. Otherwise it contains
873 -- the line number of the declaration of the typeref entity.
875 Tref_Type : Character;
876 -- This field is set to blank if no typeref is present, or if the
877 -- typeref refers to an entity in standard. Otherwise it contains
878 -- the identification character for the typeref entity. See section
879 -- "Cross-Reference Entity Identifiers" in lib-xref.ads for details.
882 -- This field is set to zero if no typeref is present, or if the
883 -- typeref refers to an entity in standard. Otherwise it contains
884 -- the column number of the declaration of the parent type.
886 Tref_Standard_Entity : Name_Id;
887 -- This field is set to No_Name if no typeref is present or if the
888 -- typeref refers to a declared entity rather than an entity in
889 -- package Standard. If there is a typeref that references an
890 -- entity in package Standard, then this field is a Name_Id
891 -- reference for the entity name.
893 Oref_File_Num : Sdep_Id;
894 -- This field is set to No_Sdep_Id if the entity doesn't override any
895 -- other entity, or to the dependency reference for the overridden
900 -- These two fields are set to the line and column of the overridden
904 -- Index into Xref table of first cross-reference
907 -- Index into Xref table of last cross-reference. The value in
908 -- Last_Xref can be less than the First_Xref value to indicate
909 -- that no entries are present in the Xref Table.
912 package Xref_Entity is new Table.Table (
913 Table_Component_Type => Xref_Entity_Record,
914 Table_Index_Type => Nat,
915 Table_Low_Bound => 1,
916 Table_Initial => 500,
917 Table_Increment => 300,
918 Table_Name => "Xref_Entity");
920 Array_Index_Reference : constant Character := '*';
921 Interface_Reference : constant Character := 'I';
922 -- Some special types of references. In the ALI file itself, these
923 -- are output as attributes of the entity, not as references, but
924 -- there is no provision in Xref_Entity_Record for storing multiple
927 -- The following table records actual cross-references
929 type Xref_Record is record
931 -- Set to the file dependency number for the cross-reference. Note
932 -- that if no file entry is present explicitly, this is just a copy
933 -- of the reference for the current cross-reference section.
936 -- Line number for the reference. This is zero when referencing a
937 -- predefined entity, but in this case Name is set.
940 -- Indicates type of reference, using code used in ALI file:
944 -- c = completion of private or incomplete type
945 -- x = type extension
946 -- i = implicit reference
947 -- Array_Index_Reference = reference to the index of an array
948 -- Interface_Reference = reference to an interface implemented
950 -- See description in lib-xref.ads for further details
953 -- Column number for the reference
955 Name : Name_Id := No_Name;
956 -- This is only used when referencing a predefined entity. Currently,
957 -- this only occurs for array indexes.
959 -- Note: for instantiation references, Rtype is set to ' ', and Col is
960 -- set to zero. One or more such entries can follow any other reference.
961 -- When there is more than one such entry, this is to be read as:
962 -- e.g. ref1 ref2 ref3
963 -- ref1 is a reference to an entity that was instantied at ref2.
964 -- ref2 itself is also the result of an instantiation, that took
968 package Xref is new Table.Table (
969 Table_Component_Type => Xref_Record,
970 Table_Index_Type => Nat,
971 Table_Low_Bound => 1,
972 Table_Initial => 2000,
973 Table_Increment => 300,
974 Table_Name => "Xref");
976 --------------------------------------
977 -- Subprograms for Reading ALI File --
978 --------------------------------------
980 procedure Initialize_ALI;
981 -- Initialize the ALI tables. Also resets all switch values to defaults
988 Read_Xref : Boolean := False;
989 Read_Lines : String := "";
990 Ignore_Lines : String := "X";
991 Ignore_Errors : Boolean := False;
992 Directly_Scanned : Boolean := False) return ALI_Id;
993 -- Given the text, T, of an ALI file, F, scan and store the information
994 -- from the file, and return the Id of the resulting entry in the ALI
995 -- table. Switch settings may be modified as described above in the
996 -- switch description settings.
998 -- Ignore_ED is normally False. If set to True, it indicates that
999 -- all AD/ED (elaboration desirable) indications in the ALI file are
1000 -- to be ignored. This parameter is obsolete now that the -f switch
1001 -- is removed from gnatbind, and should be removed ???
1003 -- Err determines the action taken on an incorrectly formatted file.
1004 -- If Err is False, then an error message is output, and the program
1005 -- is terminated. If Err is True, then no error message is output,
1006 -- and No_ALI_Id is returned.
1008 -- Ignore_Lines requests that Scan_ALI ignore any lines that start
1009 -- with any given key character. The default value of X causes all
1010 -- Xref lines to be ignored. The corresponding data in the ALI
1011 -- tables will not be filled in this case. It is not possible
1012 -- to ignore U (unit) lines, they are always read.
1014 -- Read_Lines requests that Scan_ALI process only lines that start
1015 -- with one of the given characters. The corresponding data in the
1016 -- ALI file for any characters not given in the list will not be
1017 -- set. The default value of the null string indicates that all
1018 -- lines should be read (unless Ignore_Lines is specified). U
1019 -- (unit) lines are always read regardless of the value of this
1022 -- Note: either Ignore_Lines or Read_Lines should be non-null, but not
1023 -- both. If both are provided then only the Read_Lines value is used,
1024 -- and the Ignore_Lines parameter is ignored.
1026 -- Read_XREF is set True to read and acquire the cross-reference
1027 -- information. If Read_XREF is set to True, then the effect is to ignore
1028 -- all lines other than U, W, D and X lines and the Ignore_Lines and
1029 -- Read_Lines parameters are ignored (i.e. the use of True for Read_XREF
1030 -- is equivalent to specifying an argument of "UWDX" for Read_Lines.
1032 -- Ignore_Errors is normally False. If it is set True, then Scan_ALI
1033 -- will do its best to scan through a file and extract all information
1034 -- it can, even if there are errors. In this case Err is only set if
1035 -- Scan_ALI was completely unable to process the file (e.g. it did not
1036 -- look like an ALI file at all). Ignore_Errors is intended to improve
1037 -- the downward compatibility of new compilers with old tools.
1039 -- Directly_Scanned is normally False. If it is set to True, then the
1040 -- units (spec and/or body) corresponding to the ALI file are marked as
1041 -- such. It is used to decide for what units gnatbind should generate
1042 -- the symbols corresponding to 'Version or 'Body_Version in
1043 -- Stand-Alone Libraries.