/usr/share/ada/adainclude/gnatprj/ali-util.adb is in libgnatprj6-dev 6.4.0-17ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 | ------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- A L I . U T I L --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2014, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING3. If not, go to --
-- http://www.gnu.org/licenses for a complete copy of the license. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with Debug; use Debug;
with Binderr; use Binderr;
with Opt; use Opt;
with Output; use Output;
with Osint; use Osint;
with Scans; use Scans;
with Scng;
with Sinput.C;
with Snames; use Snames;
with Stringt;
with Styleg;
with System.OS_Lib; use System.OS_Lib;
package body ALI.Util is
-- Empty procedures needed to instantiate Scng. Error procedures are
-- empty, because we don't want to report any errors when computing
-- a source checksum.
procedure Post_Scan;
procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr);
procedure Error_Msg_S (Msg : String);
procedure Error_Msg_SC (Msg : String);
procedure Error_Msg_SP (Msg : String);
-- Instantiation of Styleg, needed to instantiate Scng
package Style is new Styleg
(Error_Msg, Error_Msg_S, Error_Msg_SC, Error_Msg_SP);
-- A Scanner is needed to get checksum of a source (procedure
-- Get_File_Checksum).
package Scanner is new Scng
(Post_Scan, Error_Msg, Error_Msg_S, Error_Msg_SC, Error_Msg_SP, Style);
type Header_Num is range 0 .. 1_000;
function Hash (F : File_Name_Type) return Header_Num;
-- Function used to compute hash of ALI file name
package Interfaces is new Simple_HTable (
Header_Num => Header_Num,
Element => Boolean,
No_Element => False,
Key => File_Name_Type,
Hash => Hash,
Equal => "=");
---------------------
-- Checksums_Match --
---------------------
function Checksums_Match (Checksum1, Checksum2 : Word) return Boolean is
begin
return Checksum1 = Checksum2 and then Checksum1 /= Checksum_Error;
end Checksums_Match;
---------------
-- Error_Msg --
---------------
procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
pragma Warnings (Off, Msg);
pragma Warnings (Off, Flag_Location);
begin
null;
end Error_Msg;
-----------------
-- Error_Msg_S --
-----------------
procedure Error_Msg_S (Msg : String) is
pragma Warnings (Off, Msg);
begin
null;
end Error_Msg_S;
------------------
-- Error_Msg_SC --
------------------
procedure Error_Msg_SC (Msg : String) is
pragma Warnings (Off, Msg);
begin
null;
end Error_Msg_SC;
------------------
-- Error_Msg_SP --
------------------
procedure Error_Msg_SP (Msg : String) is
pragma Warnings (Off, Msg);
begin
null;
end Error_Msg_SP;
-----------------------
-- Get_File_Checksum --
-----------------------
function Get_File_Checksum (Fname : File_Name_Type) return Word is
Full_Name : File_Name_Type;
Source_Index : Source_File_Index;
begin
Full_Name := Find_File (Fname, Osint.Source);
-- If we cannot find the file, then return an impossible checksum,
-- impossible because checksums have the high order bit zero, so
-- that checksums do not match.
if Full_Name = No_File then
return Checksum_Error;
end if;
Source_Index := Sinput.C.Load_File (Get_Name_String (Full_Name));
if Source_Index = No_Source_File then
return Checksum_Error;
end if;
Scanner.Initialize_Scanner (Source_Index);
-- Make sure that the project language reserved words are not
-- recognized as reserved words, but as identifiers. The byte info for
-- those names have been set if we are in gnatmake.
Set_Name_Table_Byte (Name_Project, 0);
Set_Name_Table_Byte (Name_Extends, 0);
Set_Name_Table_Byte (Name_External, 0);
Set_Name_Table_Byte (Name_External_As_List, 0);
-- Scan the complete file to compute its checksum
loop
Scanner.Scan;
exit when Token = Tok_EOF;
end loop;
return Scans.Checksum;
end Get_File_Checksum;
----------
-- Hash --
----------
function Hash (F : File_Name_Type) return Header_Num is
begin
return Header_Num (Int (F) rem Header_Num'Range_Length);
end Hash;
---------------------------
-- Initialize_ALI_Source --
---------------------------
procedure Initialize_ALI_Source is
begin
-- When (re)initializing ALI data structures the ALI user expects to
-- get a fresh set of data structures. Thus we first need to erase the
-- marks put in the name table by the previous set of ALI routine calls.
-- This loop is empty and harmless the first time in.
for J in Source.First .. Source.Last loop
Set_Name_Table_Int (Source.Table (J).Sfile, 0);
Source.Table (J).Source_Found := False;
end loop;
Source.Init;
Interfaces.Reset;
end Initialize_ALI_Source;
---------------
-- Post_Scan --
---------------
procedure Post_Scan is
begin
null;
end Post_Scan;
----------------------
-- Read_Withed_ALIs --
----------------------
procedure Read_Withed_ALIs
(Id : ALI_Id;
Ignore_Errors : Boolean := False)
is
Afile : File_Name_Type;
Text : Text_Buffer_Ptr;
Idread : ALI_Id;
begin
-- Process all dependent units
for U in ALIs.Table (Id).First_Unit .. ALIs.Table (Id).Last_Unit loop
for
W in Units.Table (U).First_With .. Units.Table (U).Last_With
loop
Afile := Withs.Table (W).Afile;
-- Only process if not a generic (Afile /= No_File) and if
-- file has not been processed already.
if Afile /= No_File
and then Get_Name_Table_Int (Afile) = 0
then
Text := Read_Library_Info (Afile);
-- Unless Ignore_Errors is true, return with an error if source
-- cannot be found. We used to skip this check when we did not
-- compile library generics separately, but we now always do,
-- so there is no special case here anymore.
if Text = null then
if not Ignore_Errors then
Error_Msg_File_1 := Afile;
Error_Msg_File_2 := Withs.Table (W).Sfile;
Error_Msg ("{ not found, { must be compiled");
Set_Name_Table_Int (Afile, Int (No_Unit_Id));
return;
end if;
else
-- Enter in ALIs table
Idread :=
Scan_ALI
(F => Afile,
T => Text,
Ignore_ED => False,
Err => False);
Free (Text);
if ALIs.Table (Idread).Compile_Errors
and then not Ignore_Errors
then
Error_Msg_File_1 := Withs.Table (W).Sfile;
Error_Msg ("{ had errors, must be fixed, and recompiled");
Set_Name_Table_Int (Afile, Int (No_Unit_Id));
-- In GNATprove mode, object files are never generated, so
-- No_Object=True is not considered an error.
elsif ALIs.Table (Idread).No_Object
and then not GNATprove_Mode
and then not Ignore_Errors
then
Error_Msg_File_1 := Withs.Table (W).Sfile;
Error_Msg ("{ must be recompiled");
Set_Name_Table_Int (Afile, Int (No_Unit_Id));
end if;
-- If the Unit is an Interface to a Stand-Alone Library,
-- set the Interface flag in the Withs table, so that its
-- dependant are not considered for elaboration order.
if ALIs.Table (Idread).SAL_Interface then
Withs.Table (W).SAL_Interface := True;
Interface_Library_Unit := True;
-- Set the entry in the Interfaces hash table, so that
-- other units that import this unit will set the flag
-- in their entry in the Withs table.
Interfaces.Set (Afile, True);
else
-- Otherwise, recurse to get new dependents
Read_Withed_ALIs (Idread);
end if;
end if;
-- If the ALI file has already been processed and is an interface,
-- set the flag in the entry of the Withs table.
elsif Interface_Library_Unit and then Interfaces.Get (Afile) then
Withs.Table (W).SAL_Interface := True;
end if;
end loop;
end loop;
end Read_Withed_ALIs;
----------------------
-- Set_Source_Table --
----------------------
procedure Set_Source_Table (A : ALI_Id) is
F : File_Name_Type;
S : Source_Id;
Stamp : Time_Stamp_Type;
begin
Sdep_Loop : for D in
ALIs.Table (A).First_Sdep .. ALIs.Table (A).Last_Sdep
loop
F := Sdep.Table (D).Sfile;
if F /= No_File then
-- If this is the first time we are seeing this source file,
-- then make a new entry in the source table.
if Get_Name_Table_Int (F) = 0 then
Source.Increment_Last;
S := Source.Last;
Set_Name_Table_Int (F, Int (S));
Source.Table (S).Sfile := F;
Source.Table (S).All_Timestamps_Match := True;
-- Initialize checksum fields
Source.Table (S).Checksum := Sdep.Table (D).Checksum;
Source.Table (S).All_Checksums_Match := True;
-- In check source files mode, try to get time stamp from file
if Opt.Check_Source_Files then
Stamp := Source_File_Stamp (F);
-- If we got the stamp, then set the stamp in the source
-- table entry and mark it as set from the source so that
-- it does not get subsequently changed.
if Stamp (Stamp'First) /= ' ' then
Source.Table (S).Stamp := Stamp;
Source.Table (S).Source_Found := True;
Source.Table (S).Stamp_File := F;
-- If we could not find the file, then the stamp is set
-- from the dependency table entry (to be possibly reset
-- if we find a later stamp in subsequent processing)
else
Source.Table (S).Stamp := Sdep.Table (D).Stamp;
Source.Table (S).Source_Found := False;
Source.Table (S).Stamp_File := ALIs.Table (A).Afile;
-- In All_Sources mode, flag error of file not found
if Opt.All_Sources then
Error_Msg_File_1 := F;
Error_Msg ("cannot locate {");
end if;
end if;
-- First time for this source file, but Check_Source_Files
-- is off, so simply initialize the stamp from the Sdep entry
else
Source.Table (S).Stamp := Sdep.Table (D).Stamp;
Source.Table (S).Source_Found := False;
Source.Table (S).Stamp_File := ALIs.Table (A).Afile;
end if;
-- Here if this is not the first time for this source file,
-- so that the source table entry is already constructed.
else
S := Source_Id (Get_Name_Table_Int (F));
-- Update checksum flag
if not Checksums_Match
(Sdep.Table (D).Checksum, Source.Table (S).Checksum)
then
Source.Table (S).All_Checksums_Match := False;
end if;
-- Check for time stamp mismatch
if Sdep.Table (D).Stamp /= Source.Table (S).Stamp then
Source.Table (S).All_Timestamps_Match := False;
-- When we have a time stamp mismatch, we go look for the
-- source file even if Check_Source_Files is false, since
-- if we find it, then we can use it to resolve which of the
-- two timestamps in the ALI files is likely to be correct.
-- We only look in the current directory, because when
-- Check_Source_Files is false, other search directories are
-- likely to be incorrect.
if not Check_Source_Files
and then Is_Regular_File (Get_Name_String (F))
then
Stamp := Source_File_Stamp (F);
if Stamp (Stamp'First) /= ' ' then
Source.Table (S).Stamp := Stamp;
Source.Table (S).Source_Found := True;
Source.Table (S).Stamp_File := F;
end if;
end if;
-- If the stamp in the source table entry was set from the
-- source file, then we do not change it (the stamp in the
-- source file is always taken as the "right" one).
if Source.Table (S).Source_Found then
null;
-- Otherwise, we have no source file available, so we guess
-- that the later of the two timestamps is the right one.
-- Note that this guess only affects which error messages
-- are issued later on, not correct functionality.
else
if Sdep.Table (D).Stamp > Source.Table (S).Stamp then
Source.Table (S).Stamp := Sdep.Table (D).Stamp;
Source.Table (S).Stamp_File := ALIs.Table (A).Afile;
end if;
end if;
end if;
end if;
-- Set the checksum value in the source table
S := Source_Id (Get_Name_Table_Int (F));
Source.Table (S).Checksum := Sdep.Table (D).Checksum;
end if;
end loop Sdep_Loop;
end Set_Source_Table;
----------------------
-- Set_Source_Table --
----------------------
procedure Set_Source_Table is
begin
for A in ALIs.First .. ALIs.Last loop
Set_Source_Table (A);
end loop;
end Set_Source_Table;
-------------------------
-- Time_Stamp_Mismatch --
-------------------------
function Time_Stamp_Mismatch
(A : ALI_Id;
Read_Only : Boolean := False) return File_Name_Type
is
Src : Source_Id;
-- Source file Id for the current Sdep entry
begin
for D in ALIs.Table (A).First_Sdep .. ALIs.Table (A).Last_Sdep loop
Src := Source_Id (Get_Name_Table_Int (Sdep.Table (D).Sfile));
if Opt.Minimal_Recompilation
and then Sdep.Table (D).Stamp /= Source.Table (Src).Stamp
then
-- If minimal recompilation is in action, replace the stamp
-- of the source file in the table if checksums match.
-- ??? It is probably worth updating the ALI file with a new
-- field to avoid recomputing it each time. In any case we ensure
-- that we don't gobble up string table space by doing a mark
-- release around this computation.
Stringt.Mark;
if Checksums_Match
(Get_File_Checksum (Sdep.Table (D).Sfile),
Source.Table (Src).Checksum)
then
if Verbose_Mode then
Write_Str (" ");
Write_Str (Get_Name_String (Sdep.Table (D).Sfile));
Write_Str (": up to date, different timestamps " &
"but same checksum");
Write_Eol;
end if;
Sdep.Table (D).Stamp := Source.Table (Src).Stamp;
end if;
Stringt.Release;
end if;
if (not Read_Only) or else Source.Table (Src).Source_Found then
if not Source.Table (Src).Source_Found
or else Sdep.Table (D).Stamp /= Source.Table (Src).Stamp
then
-- If -dt debug flag set, output time stamp found/expected
if Source.Table (Src).Source_Found and then Debug_Flag_T then
Write_Str ("Source: """);
Get_Name_String (Sdep.Table (D).Sfile);
Write_Str (Name_Buffer (1 .. Name_Len));
Write_Line ("""");
Write_Str (" time stamp expected: ");
Write_Line (String (Sdep.Table (D).Stamp));
Write_Str (" time stamp found: ");
Write_Line (String (Source.Table (Src).Stamp));
end if;
-- Return the source file
return Source.Table (Src).Sfile;
end if;
end if;
end loop;
return No_File;
end Time_Stamp_Mismatch;
end ALI.Util;
|