1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2007, 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 AdaCore. --
24 ------------------------------------------------------------------------------
26 -- This package contains routines called when a fatal internal compiler
27 -- error is detected. Calls to these routines cause termination of the
28 -- current compilation with appropriate error output.
30 with Atree; use Atree;
31 with Debug; use Debug;
32 with Errout; use Errout;
33 with Fname; use Fname;
34 with Gnatvsn; use Gnatvsn;
36 with Namet; use Namet;
37 with Osint; use Osint;
38 with Output; use Output;
39 with Sinput; use Sinput;
40 with Sprint; use Sprint;
41 with Sdefault; use Sdefault;
42 with Treepr; use Treepr;
43 with Types; use Types;
45 with Ada.Exceptions; use Ada.Exceptions;
47 with System.Soft_Links; use System.Soft_Links;
49 package body Comperr is
55 Abort_In_Progress : Boolean := False;
56 -- Used to prevent runaway recursion if something segfaults
57 -- while processing a previous abort.
59 -----------------------
60 -- Local Subprograms --
61 -----------------------
63 procedure Repeat_Char (Char : Character; Col : Nat; After : Character);
64 -- Output Char until current column is at or past Col, and then output
65 -- the character given by After (if column is already past Col on entry,
66 -- then the effect is simply to output the After character).
72 procedure Compiler_Abort
75 Fallback_Loc : String := "")
77 -- The procedures below output a "bug box" with information about
78 -- the cause of the compiler abort and about the preferred method
79 -- of reporting bugs. The default is a bug box appropriate for
80 -- the FSF version of GNAT, but there are specializations for
81 -- the GNATPRO and Public releases by AdaCore.
83 XF : constant Positive := X'First;
84 -- Start index, usually 1, but we won't assume this
87 -- Add blanks up to column 76, and then a final vertical bar
95 Repeat_Char (' ', 76, '|');
99 Is_GPL_Version : constant Boolean := Gnatvsn.Build_Type = GPL;
100 Is_FSF_Version : constant Boolean := Gnatvsn.Build_Type = FSF;
102 -- Start of processing for Compiler_Abort
105 Cancel_Special_Output;
107 -- Prevent recursion through Compiler_Abort, e.g. via SIGSEGV
109 if Abort_In_Progress then
110 Exit_Program (E_Abort);
113 Abort_In_Progress := True;
115 -- If any errors have already occurred, then we guess that the abort
116 -- may well be caused by previous errors, and we don't make too much
117 -- fuss about it, since we want to let programmer fix the errors first.
119 -- Debug flag K disables this behavior (useful for debugging)
121 if Serious_Errors_Detected /= 0 and then not Debug_Flag_K then
122 Errout.Finalize (Last_Call => True);
123 Errout.Output_Messages;
126 Write_Str ("compilation abandoned due to previous error");
132 Exit_Program (E_Errors);
134 -- Otherwise give message with details of the abort
139 -- Generate header for bug box
142 Repeat_Char ('=', 29, 'G');
143 Write_Str ("NAT BUG DETECTED");
144 Repeat_Char ('=', 76, '+');
147 -- Output GNAT version identification
150 Write_Str (Gnat_Version_String);
153 -- Output target name, deleting junk final reverse slash
155 if Target_Name.all (Target_Name.all'Last) = '\'
156 or else Target_Name.all (Target_Name.all'Last) = '/'
158 Write_Str (Target_Name.all (1 .. Target_Name.all'Last - 1));
160 Write_Str (Target_Name.all);
163 -- Output identification of error
167 if X'Length + Column > 76 then
169 Write_Str ("GCC error:");
177 if X'Length > 70 then
179 Last_Blank : Integer := 70;
182 for P in 39 .. 68 loop
183 if X (XF + P) = ' ' then
188 Write_Str (X (XF .. XF - 1 + Last_Blank));
191 Write_Str (X (XF + Last_Blank .. X'Last));
198 Write_Str (", Code=");
199 Write_Int (Int (Code));
203 -- For exception case, get exception message from the TSD. Note
204 -- that it would be neater and cleaner to pass the exception
205 -- message (obtained from Exception_Message) as a parameter to
206 -- Compiler_Abort, but we can't do this quite yet since it would
207 -- cause bootstrap path problems for 3.10 to 3.11.
210 Write_Str (Exception_Message (Get_Current_Excep.all.all));
215 -- Output source location information
217 if Sloc (Current_Error_Node) <= No_Location then
218 if Fallback_Loc'Length > 0 then
219 Write_Str ("| Error detected around ");
220 Write_Str (Fallback_Loc);
222 Write_Str ("| No source file position information available");
227 Write_Str ("| Error detected at ");
228 Write_Location (Sloc (Current_Error_Node));
232 -- There are two cases now. If the file gnat_bug.box exists,
233 -- we use the contents of this file at this point.
238 Src : Source_Buffer_Ptr;
242 Name_Buffer (1 .. 12) := "gnat_bug.box";
244 Read_Source_File (Name_Enter, 0, Hi, Src);
246 -- If we get a Src file, we use it
251 Outer : while Lo < Hi loop
255 exit Inner when Src (Lo) = ASCII.CR
256 or else Src (Lo) = ASCII.LF;
257 Write_Char (Src (Lo));
264 and then (Src (Lo) = ASCII.CR
265 or else Src (Lo) = ASCII.LF)
271 -- Otherwise we use the standard fixed text
274 if Is_FSF_Version then
276 ("| Please submit a bug report; see" &
277 " http://gcc.gnu.org/bugs.html.");
280 elsif Is_GPL_Version then
283 ("| Please submit a bug report by email " &
284 "to report@adacore.com.");
288 ("| GAP members can alternatively use GNAT Tracker:");
292 ("| http://www.adacore.com/ " &
293 "section 'send a report'.");
297 ("| See gnatinfo.txt for full info on procedure " &
298 "for submitting bugs.");
303 ("| Please submit a bug report using GNAT Tracker:");
307 ("| http://www.adacore.com/gnattracker/ " &
308 "section 'send a report'.");
312 ("| alternatively submit a bug report by email " &
313 "to report@adacore.com,");
317 ("| including your customer number #nnn " &
318 "in the subject line.");
323 ("| Use a subject line meaningful to you" &
324 " and us to track the bug.");
328 ("| Include the entire contents of this bug " &
329 "box in the report.");
333 ("| Include the exact gcc or gnatmake command " &
334 "that you entered.");
338 ("| Also include sources listed below in gnatchop format");
342 ("| (concatenated together with no headers between files).");
345 if not Is_FSF_Version then
347 ("| Use plain ASCII or MIME attachment.");
353 -- Complete output of bug box
356 Repeat_Char ('=', 76, '+');
362 Print_Tree_Node (Current_Error_Node);
368 Write_Line ("Please include these source files with error report");
369 Write_Line ("Note that list may not be accurate in some cases, ");
370 Write_Line ("so please double check that the problem can still ");
371 Write_Line ("be reproduced with the set of files listed.");
374 for U in Main_Unit .. Last_Unit loop
376 if not Is_Internal_File_Name
377 (File_Name (Source_Index (U)))
379 Write_Name (Full_File_Name (Source_Index (U)));
383 -- No point in double bug box if we blow up trying to print
384 -- the list of file names! Output informative msg and quit.
388 Write_Str ("list may be incomplete");
398 raise Unrecoverable_Error;
407 procedure Repeat_Char (Char : Character; Col : Nat; After : Character) is
409 while Column < Col loop