gcc/ada/comperr.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                              C O M P E R R                               --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --                            $Revision: 1.1 $
  10 --                                                                          --
  11 --          Copyright (C) 1992-2001 Free Software Foundation, Inc.          --
  12 --                                                                          --
  13 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  14 -- terms of the  GNU General Public License as published  by the Free Soft- --
  15 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  16 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  17 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  18 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  19 -- for  more details.  You should have  received  a copy of the GNU General --
  20 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  21 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  22 -- MA 02111-1307, USA.                                                      --
  23 --                                                                          --
  24 -- GNAT was originally developed  by the GNAT team at  New York University. --
  25 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  26 --                                                                          --
  27 ------------------------------------------------------------------------------
  28
  29 --  This package contains routines called when a fatal internal compiler
  30 --  error is detected. Calls to these routines cause termination of the
  31 --  current compilation with appropriate error output.
  32
  33 with Atree;    use Atree;
  34 with Debug;    use Debug;
  35 with Errout;   use Errout;
  36 with Fname;    use Fname;
  37 with Gnatvsn;  use Gnatvsn;
  38 with Lib;      use Lib;
  39 with Namet;    use Namet;
  40 with Osint;    use Osint;
  41 with Output;   use Output;
  42 with Sinput;   use Sinput;
  43 with Sprint;   use Sprint;
  44 with Sdefault; use Sdefault;
  45 with Treepr;   use Treepr;
  46 with Types;    use Types;
  47
  48 with Ada.Exceptions; use Ada.Exceptions;
  49
  50 with System.Soft_Links; use System.Soft_Links;
  51
  52 package body Comperr is
  53
  54    ----------------
  55    -- Local Data --
  56    ----------------
  57
  58    Abort_In_Progress : Boolean := False;
  59    --  Used to prevent runaway recursion if something segfaults
  60    --  while processing a previous abort.
  61
  62    -----------------------
  63    -- Local Subprograms --
  64    -----------------------
  65
  66    procedure Repeat_Char (Char : Character; Col : Nat; After : Character);
  67    --  Output Char until current column is at or past Col, and then output
  68    --  the character given by After (if column is already past Col on entry,
  69    --  then the effect is simply to output the After character).
  70
  71    --------------------
  72    -- Compiler_Abort --
  73    --------------------
  74
  75    procedure Compiler_Abort
  76      (X    : String;
  77       Code : Integer := 0)
  78    is
  79       procedure End_Line;
  80       --  Add blanks up to column 76, and then a final vertical bar
  81
  82       procedure End_Line is
  83       begin
  84          Repeat_Char (' ', 76, '|');
  85          Write_Eol;
  86       end End_Line;
  87
  88       Public_Version : constant Boolean := (Gnat_Version_String (5) = 'p');
  89
  90    --  Start of processing for Compiler_Abort
  91
  92    begin
  93       --  Prevent recursion through Compiler_Abort, e.g. via SIGSEGV.
  94
  95       if Abort_In_Progress then
  96          Exit_Program (E_Abort);
  97       end if;
  98
  99       Abort_In_Progress := True;
 100
 101       --  If errors have already occured, then we guess that the abort may
 102       --  well be caused by previous errors, and we don't make too much fuss
 103       --  about it, since we want to let the programmer fix the errors first.
 104
 105       --  Debug flag K disables this behavior (useful for debugging)
 106
 107       if Errors_Detected /= 0 and then not Debug_Flag_K then
 108          Errout.Finalize;
 109
 110          Set_Standard_Error;
 111          Write_Str ("compilation abandoned due to previous error");
 112          Write_Eol;
 113
 114          Set_Standard_Output;
 115          Source_Dump;
 116          Tree_Dump;
 117          Exit_Program (E_Errors);
 118
 119       --  Otherwise give message with details of the abort
 120
 121       else
 122          Set_Standard_Error;
 123
 124          --  Generate header for bug box
 125
 126          Write_Char ('+');
 127          Repeat_Char ('=', 29, 'G');
 128          Write_Str ("NAT BUG DETECTED");
 129          Repeat_Char ('=', 76, '+');
 130          Write_Eol;
 131
 132          --  Output GNAT version identification
 133
 134          Write_Str ("| ");
 135          Write_Str (Gnat_Version_String);
 136          Write_Str (" (");
 137
 138          --  Output target name, deleting junk final reverse slash
 139
 140          if Target_Name.all (Target_Name.all'Last) = '\'
 141            or else Target_Name.all (Target_Name.all'Last) = '/'
 142          then
 143             Write_Str (Target_Name.all (1 .. Target_Name.all'Last - 1));
 144          else
 145             Write_Str (Target_Name.all);
 146          end if;
 147
 148          --  Output identification of error
 149
 150          Write_Str (") ");
 151
 152          if X'Length + Column > 76 then
 153             if Code < 0 then
 154                Write_Str ("GCC error:");
 155             end if;
 156
 157             End_Line;
 158
 159             Write_Str ("| ");
 160          end if;
 161
 162          if X'Length > 70 then
 163             declare
 164                Last_Blank : Integer := 70;
 165
 166             begin
 167                for P in 40 .. 69 loop
 168                   if X (P) = ' ' then
 169                      Last_Blank := P;
 170                   end if;
 171                end loop;
 172
 173                Write_Str (X (1 .. Last_Blank));
 174                End_Line;
 175                Write_Str ("|    ");
 176                Write_Str (X (Last_Blank + 1 .. X'Length));
 177             end;
 178          else
 179             Write_Str (X);
 180          end if;
 181
 182          if Code > 0 then
 183             Write_Str (", Code=");
 184             Write_Int (Int (Code));
 185
 186          elsif Code = 0 then
 187
 188             --  For exception case, get exception message from the TSD. Note
 189             --  that it would be neater and cleaner to pass the exception
 190             --  message (obtained from Exception_Message) as a parameter to
 191             --  Compiler_Abort, but we can't do this quite yet since it would
 192             --  cause bootstrap path problems for 3.10 to 3.11.
 193
 194             Write_Char (' ');
 195             Write_Str (Exception_Message (Get_Current_Excep.all.all));
 196          end if;
 197
 198          End_Line;
 199
 200          --  Output source location information
 201
 202          if Sloc (Current_Error_Node) <= Standard_Location
 203            or else Sloc (Current_Error_Node) = No_Location
 204          then
 205             Write_Str ("| No source file position information available");
 206             End_Line;
 207          else
 208             Write_Str ("| Error detected at ");
 209             Write_Location (Sloc (Current_Error_Node));
 210             End_Line;
 211          end if;
 212
 213          --  There are two cases now. If the file gnat_bug.box exists,
 214          --  we use the contents of this file at this point.
 215
 216          declare
 217             Lo  : Source_Ptr;
 218             Hi  : Source_Ptr;
 219             Src : Source_Buffer_Ptr;
 220
 221          begin
 222             Namet.Unlock;
 223             Name_Buffer (1 .. 12) := "gnat_bug.box";
 224             Name_Len := 12;
 225             Read_Source_File (Name_Enter, 0, Hi, Src);
 226
 227             --  If we get a Src file, we use it
 228
 229             if Src /= null then
 230                Lo := 0;
 231
 232                Outer : while Lo < Hi loop
 233                   Write_Str ("| ");
 234
 235                   Inner : loop
 236                      exit Inner when Src (Lo) = ASCII.CR
 237                        or else Src (Lo) = ASCII.LF;
 238                      Write_Char (Src (Lo));
 239                      Lo := Lo + 1;
 240                   end loop Inner;
 241
 242                   End_Line;
 243
 244                   while Lo <= Hi
 245                     and then (Src (Lo) = ASCII.CR
 246                                 or else Src (Lo) = ASCII.LF)
 247                   loop
 248                      Lo := Lo + 1;
 249                   end loop;
 250                end loop Outer;
 251
 252             --  Otherwise we use the standard fixed text
 253
 254             else
 255                Write_Str
 256                  ("| Please submit bug report by email to report@gnat.com.");
 257                End_Line;
 258
 259                if not Public_Version then
 260                   Write_Str
 261                     ("| Use a subject line meaningful to you" &
 262                      " and us to track the bug.");
 263                   End_Line;
 264
 265                   Write_Str
 266                     ("| (include your customer number #nnn " &
 267                      "in the subject line).");
 268                   End_Line;
 269                end if;
 270
 271                Write_Str
 272                  ("| Include the entire contents of this bug " &
 273                   "box in the report.");
 274                End_Line;
 275
 276                Write_Str
 277                  ("| Include the exact gcc or gnatmake command " &
 278                   "that you entered.");
 279                End_Line;
 280
 281                Write_Str
 282                  ("| Also include sources listed below in gnatchop format");
 283                End_Line;
 284
 285                Write_Str
 286                  ("| (concatenated together with no headers between files).");
 287                End_Line;
 288
 289                if Public_Version then
 290                   Write_Str
 291                     ("| (use plain ASCII or MIME attachment).");
 292                   End_Line;
 293
 294                   Write_Str
 295                     ("| See gnatinfo.txt for full info on procedure " &
 296                      "for submitting bugs.");
 297                   End_Line;
 298
 299                else
 300                   Write_Str
 301                     ("| (use plain ASCII or MIME attachment, or FTP "
 302                      & "to your customer directory).");
 303                   End_Line;
 304
 305                   Write_Str
 306                     ("| See README.GNATPRO for full info on procedure " &
 307                      "for submitting bugs.");
 308                   End_Line;
 309                end if;
 310             end if;
 311          end;
 312
 313          --  Complete output of bug box
 314
 315          Write_Char ('+');
 316          Repeat_Char ('=', 76, '+');
 317          Write_Eol;
 318
 319          if Debug_Flag_3 then
 320             Write_Eol;
 321             Write_Eol;
 322             Print_Tree_Node (Current_Error_Node);
 323             Write_Eol;
 324          end if;
 325
 326          Write_Eol;
 327
 328          Write_Line ("Please include these source files with error report");
 329          Write_Eol;
 330
 331          for U in Main_Unit .. Last_Unit loop
 332             begin
 333                if not Is_Internal_File_Name
 334                         (File_Name (Source_Index (U)))
 335                then
 336                   Write_Name (Full_File_Name (Source_Index (U)));
 337                   Write_Eol;
 338                end if;
 339
 340             --  No point in double bug box if we blow up trying to print
 341             --  the list of file names! Output informative msg and quit.
 342
 343             exception
 344                when others =>
 345                   Write_Str ("list may be incomplete");
 346                   exit;
 347             end;
 348          end loop;
 349
 350          Write_Eol;
 351          Set_Standard_Output;
 352
 353          Tree_Dump;
 354          Source_Dump;
 355          raise Unrecoverable_Error;
 356       end if;
 357
 358    end Compiler_Abort;
 359
 360    -----------------
 361    -- Repeat_Char --
 362    -----------------
 363
 364    procedure Repeat_Char (Char : Character; Col : Nat; After : Character) is
 365    begin
 366       while Column < Col loop
 367          Write_Char (Char);
 368       end loop;
 369
 370       Write_Char (After);
 371    end Repeat_Char;
 372
 373 end Comperr;