1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2006, 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 2, 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 COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by AdaCore. --
25 ------------------------------------------------------------------------------
27 -- This package contains routines called when a fatal internal compiler
28 -- error is detected. Calls to these routines cause termination of the
29 -- current compilation with appropriate error output.
31 with Atree; use Atree;
32 with Debug; use Debug;
33 with Errout; use Errout;
34 with Fname; use Fname;
35 with Gnatvsn; use Gnatvsn;
37 with Namet; use Namet;
38 with Osint; use Osint;
39 with Output; use Output;
40 with Sinput; use Sinput;
41 with Sprint; use Sprint;
42 with Sdefault; use Sdefault;
43 with Treepr; use Treepr;
44 with Types; use Types;
46 with Ada.Exceptions; use Ada.Exceptions;
48 with System.Soft_Links; use System.Soft_Links;
50 package body Comperr is
56 Abort_In_Progress : Boolean := False;
57 -- Used to prevent runaway recursion if something segfaults
58 -- while processing a previous abort.
60 -----------------------
61 -- Local Subprograms --
62 -----------------------
64 procedure Repeat_Char (Char : Character; Col : Nat; After : Character);
65 -- Output Char until current column is at or past Col, and then output
66 -- the character given by After (if column is already past Col on entry,
67 -- then the effect is simply to output the After character).
73 procedure Compiler_Abort
76 Fallback_Loc : String := "")
78 -- The procedures below output a "bug box" with information about
79 -- the cause of the compiler abort and about the preferred method
80 -- of reporting bugs. The default is a bug box appropriate for
81 -- the FSF version of GNAT, but there are specializations for
82 -- the GNATPRO and Public releases by AdaCore.
84 XF : constant Positive := X'First;
85 -- Start index, usually 1, but we won't assume this
88 -- Add blanks up to column 76, and then a final vertical bar
96 Repeat_Char (' ', 76, '|');
100 Is_GPL_Version : constant Boolean := Gnatvsn.Build_Type = GPL;
101 Is_FSF_Version : constant Boolean := Gnatvsn.Build_Type = FSF;
103 -- Start of processing for Compiler_Abort
106 Cancel_Special_Output;
108 -- Prevent recursion through Compiler_Abort, e.g. via SIGSEGV
110 if Abort_In_Progress then
111 Exit_Program (E_Abort);
114 Abort_In_Progress := True;
116 -- If any errors have already occurred, then we guess that the abort
117 -- may well be caused by previous errors, and we don't make too much
118 -- fuss about it, since we want to let programmer fix the errors first.
120 -- Debug flag K disables this behavior (useful for debugging)
122 if Serious_Errors_Detected /= 0 and then not Debug_Flag_K then
124 Errout.Output_Messages;
127 Write_Str ("compilation abandoned due to previous error");
133 Exit_Program (E_Errors);
135 -- Otherwise give message with details of the abort
140 -- Generate header for bug box
143 Repeat_Char ('=', 29, 'G');
144 Write_Str ("NAT BUG DETECTED");
145 Repeat_Char ('=', 76, '+');
148 -- Output GNAT version identification
151 Write_Str (Gnat_Version_String);
154 -- Output target name, deleting junk final reverse slash
156 if Target_Name.all (Target_Name.all'Last) = '\'
157 or else Target_Name.all (Target_Name.all'Last) = '/'
159 Write_Str (Target_Name.all (1 .. Target_Name.all'Last - 1));
161 Write_Str (Target_Name.all);
164 -- Output identification of error
168 if X'Length + Column > 76 then
170 Write_Str ("GCC error:");
178 if X'Length > 70 then
180 Last_Blank : Integer := 70;
183 for P in 39 .. 68 loop
184 if X (XF + P) = ' ' then
189 Write_Str (X (XF .. XF - 1 + Last_Blank));
192 Write_Str (X (XF + Last_Blank .. X'Last));
199 Write_Str (", Code=");
200 Write_Int (Int (Code));
204 -- For exception case, get exception message from the TSD. Note
205 -- that it would be neater and cleaner to pass the exception
206 -- message (obtained from Exception_Message) as a parameter to
207 -- Compiler_Abort, but we can't do this quite yet since it would
208 -- cause bootstrap path problems for 3.10 to 3.11.
211 Write_Str (Exception_Message (Get_Current_Excep.all.all));
216 -- Output source location information
218 if Sloc (Current_Error_Node) <= No_Location then
219 if Fallback_Loc'Length > 0 then
220 Write_Str ("| Error detected around ");
221 Write_Str (Fallback_Loc);
223 Write_Str ("| No source file position information available");
228 Write_Str ("| Error detected at ");
229 Write_Location (Sloc (Current_Error_Node));
233 -- There are two cases now. If the file gnat_bug.box exists,
234 -- we use the contents of this file at this point.
239 Src : Source_Buffer_Ptr;
243 Name_Buffer (1 .. 12) := "gnat_bug.box";
245 Read_Source_File (Name_Enter, 0, Hi, Src);
247 -- If we get a Src file, we use it
252 Outer : while Lo < Hi loop
256 exit Inner when Src (Lo) = ASCII.CR
257 or else Src (Lo) = ASCII.LF;
258 Write_Char (Src (Lo));
265 and then (Src (Lo) = ASCII.CR
266 or else Src (Lo) = ASCII.LF)
272 -- Otherwise we use the standard fixed text
275 if Is_FSF_Version then
277 ("| Please submit a bug report; see" &
278 " http://gcc.gnu.org/bugs.html.");
281 elsif Is_GPL_Version then
284 ("| Please submit a bug report by email " &
285 "to report@adacore.com.");
289 ("| GAP members can alternatively use GNAT Tracker:");
293 ("| http://www.adacore.com/ " &
294 "section 'send a report'.");
298 ("| See gnatinfo.txt for full info on procedure " &
299 "for submitting bugs.");
304 ("| Please submit a bug report using GNAT Tracker:");
308 ("| http://www.adacore.com/gnattracker/ " &
309 "section 'send a report'.");
313 ("| alternatively submit a bug report by email " &
314 "to report@adacore.com,");
318 ("| including your customer number #nnn " &
319 "in the subject line.");
324 ("| Use a subject line meaningful to you" &
325 " and us to track the bug.");
329 ("| Include the entire contents of this bug " &
330 "box in the report.");
334 ("| Include the exact gcc or gnatmake command " &
335 "that you entered.");
339 ("| Also include sources listed below in gnatchop format");
343 ("| (concatenated together with no headers between files).");
346 if not Is_FSF_Version then
348 ("| Use plain ASCII or MIME attachment.");
354 -- Complete output of bug box
357 Repeat_Char ('=', 76, '+');
363 Print_Tree_Node (Current_Error_Node);
369 Write_Line ("Please include these source files with error report");
370 Write_Line ("Note that list may not be accurate in some cases, ");
371 Write_Line ("so please double check that the problem can still ");
372 Write_Line ("be reproduced with the set of files listed.");
375 for U in Main_Unit .. Last_Unit loop
377 if not Is_Internal_File_Name
378 (File_Name (Source_Index (U)))
380 Write_Name (Full_File_Name (Source_Index (U)));
384 -- No point in double bug box if we blow up trying to print
385 -- the list of file names! Output informative msg and quit.
389 Write_Str ("list may be incomplete");
399 raise Unrecoverable_Error;
408 procedure Repeat_Char (Char : Character; Col : Nat; After : Character) is
410 while Column < Col loop