1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 2003-2007, 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 is the VMS version of this package
28 with Ada.Exceptions; use Ada.Exceptions;
29 with Ada.Sequential_IO;
30 with Ada.Text_IO; use Ada.Text_IO;
32 package body Symbols is
34 Case_Sensitive : constant String := "case_sensitive=";
35 Symbol_Vector : constant String := "SYMBOL_VECTOR=(";
36 Equal_Data : constant String := "=DATA)";
37 Equal_Procedure : constant String := "=PROCEDURE)";
38 Gsmatch : constant String := "gsmatch=";
39 Gsmatch_Lequal : constant String := "gsmatch=lequal,";
41 Symbol_File_Name : String_Access := null;
42 -- Name of the symbol file
44 Long_Symbol_Length : constant := 100;
45 -- Magic length of symbols, over which the lines are split
47 Sym_Policy : Policy := Autonomous;
48 -- The symbol policy. Set by Initialize
50 Major_ID : Integer := 1;
51 -- The Major ID. May be modified by Initialize if Library_Version is
52 -- specified or if it is read from the reference symbol file.
54 Soft_Major_ID : Boolean := True;
55 -- False if library version is specified in procedure Initialize.
56 -- When True, Major_ID may be modified if found in the reference symbol
59 Minor_ID : Natural := 0;
60 -- The Minor ID. May be modified if read from the reference symbol file
62 Soft_Minor_ID : Boolean := True;
63 -- False if symbol policy is Autonomous, if library version is specified
64 -- in procedure Initialize and is not the same as the major ID read from
65 -- the reference symbol file. When True, Minor_ID may be increased in
66 -- Compliant symbol policy.
68 subtype Byte is Character;
69 -- Object files are stream of bytes, but some of these bytes, those for
70 -- the names of the symbols, are ASCII characters.
72 package Byte_IO is new Ada.Sequential_IO (Byte);
75 File : Byte_IO.File_Type;
76 -- Each object file is read as a stream of bytes (characters)
78 function Equal (Left, Right : Symbol_Data) return Boolean;
79 -- Test for equality of symbols
81 function Image (N : Integer) return String;
82 -- Returns the image of N, without the initial space
88 function Equal (Left, Right : Symbol_Data) return Boolean is
90 return Left.Name /= null and then
91 Right.Name /= null and then
92 Left.Name.all = Right.Name.all and then
93 Left.Kind = Right.Kind and then
94 Left.Present = Right.Present;
101 function Image (N : Integer) return String is
102 Result : constant String := N'Img;
104 if Result (Result'First) = ' ' then
105 return Result (Result'First + 1 .. Result'Last);
117 (Symbol_File : String;
119 Symbol_Policy : Policy;
122 Success : out Boolean)
124 File : Ada.Text_IO.File_Type;
125 Line : String (1 .. 2_000);
131 -- Record the symbol file name
133 Symbol_File_Name := new String'(Symbol_File);
137 Sym_Policy := Symbol_Policy;
139 -- Record the version (Major ID)
143 Soft_Major_ID := True;
147 Major_ID := Integer'Value (Version);
148 Soft_Major_ID := False;
150 if Major_ID <= 0 then
151 raise Constraint_Error;
155 when Constraint_Error =>
157 Put_Line ("Version """ & Version & """ is illegal.");
158 Put_Line ("On VMS, version must be a positive number");
167 Soft_Minor_ID := Sym_Policy /= Autonomous;
169 -- Empty the symbol tables
171 Symbol_Table.Set_Last (Original_Symbols, 0);
172 Symbol_Table.Set_Last (Complete_Symbols, 0);
174 -- Assume that everything will be fine
178 -- If policy is Compliant or Controlled, attempt to read the reference
179 -- file. If policy is Restricted, attempt to read the symbol file.
181 if Sym_Policy /= Autonomous then
183 when Autonomous | Direct =>
186 when Compliant | Controlled =>
188 Open (File, In_File, Reference);
191 when Ada.Text_IO.Name_Error =>
197 Put_Line ("could not open """ & Reference & """");
198 Put_Line (Exception_Message (X));
207 Open (File, In_File, Symbol_File);
210 when Ada.Text_IO.Name_Error =>
216 Put_Line ("could not open """ & Symbol_File & """");
217 Put_Line (Exception_Message (X));
227 while not End_Of_File (File) loop
230 Get_Line (File, Line (Offset + 1 .. Line'Last), Last);
231 exit when Line (Last) /= '-';
233 if End_Of_File (File) then
235 Put_Line ("symbol file """ & Reference &
236 """ is incorrectly formatted:");
237 Put_Line ("""" & Line (1 .. Last) & """");
249 -- Ignore empty lines
254 -- Ignore lines starting with "case_sensitive="
256 elsif Last > Case_Sensitive'Length
257 and then Line (1 .. Case_Sensitive'Length) = Case_Sensitive
261 -- Line starting with "SYMBOL_VECTOR=("
263 elsif Last > Symbol_Vector'Length
264 and then Line (1 .. Symbol_Vector'Length) = Symbol_Vector
267 -- SYMBOL_VECTOR=(<symbol>=DATA)
269 if Last > Symbol_Vector'Length + Equal_Data'Length and then
270 Line (Last - Equal_Data'Length + 1 .. Last) = Equal_Data
272 Symbol_Table.Append (Original_Symbols,
274 new String'(Line (Symbol_Vector'Length + 1 ..
275 Last - Equal_Data'Length)),
279 -- SYMBOL_VECTOR=(<symbol>=PROCEDURE)
281 elsif Last > Symbol_Vector'Length + Equal_Procedure'Length
283 Line (Last - Equal_Procedure'Length + 1 .. Last) =
286 Symbol_Table.Append (Original_Symbols,
288 new String'(Line (Symbol_Vector'Length + 1 ..
289 Last - Equal_Procedure'Length)),
293 -- Anything else is incorrectly formatted
297 Put_Line ("symbol file """ & Reference &
298 """ is incorrectly formatted:");
299 Put_Line ("""" & Line (1 .. Last) & """");
307 -- Lines with "gsmatch=lequal," or "gsmatch=equal,"
309 elsif Last > Gsmatch'Length
310 and then Line (1 .. Gsmatch'Length) = Gsmatch
313 Start : Positive := Gsmatch'Length + 1;
314 Finish : Positive := Start;
315 OK : Boolean := True;
319 -- First, look for the first coma
322 if Start >= Last - 1 then
326 elsif Line (Start) = ',' then
337 -- If the comma is found, get the Major and the Minor IDs
341 if Line (Finish) not in '0' .. '9'
342 or else Finish >= Last - 1
348 exit when Line (Finish + 1) = ',';
350 Finish := Finish + 1;
355 ID := Integer'Value (Line (Start .. Finish));
358 -- If Soft_Major_ID is True, it means that
359 -- Library_Version was not specified.
361 if Soft_Major_ID then
364 -- If the Major ID in the reference file is different
365 -- from the Library_Version, then the Minor ID will be 0
366 -- because there is no point in taking the Minor ID in
367 -- the reference file, or incrementing it. So, we set
368 -- Soft_Minor_ID to False, so that we don't modify
369 -- the Minor_ID later.
371 elsif Major_ID /= ID then
372 Soft_Minor_ID := False;
379 if Line (Finish) not in '0' .. '9' then
384 exit when Finish = Last;
386 Finish := Finish + 1;
389 -- Only set Minor_ID if Soft_Minor_ID is True (see above)
391 if OK and then Soft_Minor_ID then
392 Minor_ID := Integer'Value (Line (Start .. Finish));
396 -- If OK is not True, that means the line is not correctly
401 Put_Line ("symbol file """ & Reference &
402 """ is incorrectly formatted");
403 Put_Line ("""" & Line (1 .. Last) & """");
412 -- Anything else is incorrectly formatted
416 Put_Line ("unexpected line in symbol file """ &
418 Put_Line ("""" & Line (1 .. Last) & """");
435 package body Processing is separate;
443 Success : out Boolean)
445 File : Ada.Text_IO.File_Type;
448 S_Data : Symbol_Data;
452 -- Most probable index in the Complete_Symbols of the current symbol
453 -- in Original_Symbol.
458 -- Nothing to be done if Initialize has never been called
460 if Symbol_File_Name = null then
465 -- First find if the symbols in the reference symbol file are also
466 -- in the object files. Note that this is not done if the policy is
467 -- Autonomous, because no reference symbol file has been read.
469 -- Expect the first symbol in the symbol file to also be the first
470 -- in Complete_Symbols.
474 for Index_1 in 1 .. Symbol_Table.Last (Original_Symbols) loop
475 S_Data := Original_Symbols.Table (Index_1);
479 for Index_2 in Cur .. Symbol_Table.Last (Complete_Symbols) loop
480 if Equal (S_Data, Complete_Symbols.Table (Index_2)) then
482 Complete_Symbols.Table (Index_2).Present := False;
484 exit First_Object_Loop;
486 end loop First_Object_Loop;
488 -- If the symbol could not be found between Cur and Last, try
493 for Index_2 in 1 .. Cur - 1 loop
494 if Equal (S_Data, Complete_Symbols.Table (Index_2)) then
496 Complete_Symbols.Table (Index_2).Present := False;
498 exit Second_Object_Loop;
500 end loop Second_Object_Loop;
503 -- If the symbol is not found, mark it as such in the table
506 if (not Quiet) or else Sym_Policy = Controlled then
507 Put_Line ("symbol """ & S_Data.Name.all &
508 """ is no longer present in the object files");
511 if Sym_Policy = Controlled or else Sym_Policy = Restricted then
515 -- Any symbol that is undefined in the reference symbol file
516 -- triggers an increase of the Major ID, because the new
517 -- version of the library is no longer compatible with
518 -- existing executables.
520 elsif Soft_Major_ID then
521 Major_ID := Major_ID + 1;
523 Soft_Major_ID := False;
524 Soft_Minor_ID := False;
527 Original_Symbols.Table (Index_1).Present := False;
528 Free (Original_Symbols.Table (Index_1).Name);
530 if Soft_Minor_ID then
531 Minor_ID := Minor_ID + 1;
532 Soft_Minor_ID := False;
537 if Sym_Policy /= Restricted then
539 -- Append additional symbols, if any, to the Original_Symbols
542 for Index in 1 .. Symbol_Table.Last (Complete_Symbols) loop
543 S_Data := Complete_Symbols.Table (Index);
545 if S_Data.Present then
547 if Sym_Policy = Controlled then
548 Put_Line ("symbol """ & S_Data.Name.all &
549 """ is not in the reference symbol file");
553 elsif Soft_Minor_ID then
554 Minor_ID := Minor_ID + 1;
555 Soft_Minor_ID := False;
558 Symbol_Table.Append (Original_Symbols, S_Data);
559 Complete_Symbols.Table (Index).Present := False;
563 -- Create the symbol file
565 Create (File, Ada.Text_IO.Out_File, Symbol_File_Name.all);
567 Put (File, Case_Sensitive);
568 Put_Line (File, "yes");
570 -- Put a line in the symbol file for each symbol in symbol table
572 for Index in 1 .. Symbol_Table.Last (Original_Symbols) loop
573 if Original_Symbols.Table (Index).Present then
574 Put (File, Symbol_Vector);
576 -- Split the line if symbol name length is too large
578 if Original_Symbols.Table (Index).Name'Length >
581 Put_Line (File, "-");
584 Put (File, Original_Symbols.Table (Index).Name.all);
586 if Original_Symbols.Table (Index).Name'Length >
589 Put_Line (File, "-");
592 if Original_Symbols.Table (Index).Kind = Data then
593 Put_Line (File, Equal_Data);
596 Put_Line (File, Equal_Procedure);
599 Free (Original_Symbols.Table (Index).Name);
603 Put (File, Case_Sensitive);
604 Put_Line (File, "NO");
606 -- Put the version IDs
608 Put (File, Gsmatch_Lequal);
609 Put (File, Image (Major_ID));
611 Put_Line (File, Image (Minor_ID));
619 Symbol_Table.Set_Last (Original_Symbols, 0);
620 Symbol_Table.Set_Last (Complete_Symbols, 0);
622 -- Clear the symbol file name
624 Free (Symbol_File_Name);
632 Put_Line ("unexpected exception raised while finalizing """
633 & Symbol_File_Name.all & """");
634 Put_Line (Exception_Information (X));