1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2008, 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 Targparm; use Targparm;
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 -- Generate a "standard" error message instead of a bug box in case of
117 -- .NET compiler, since we do not support all constructs of the
118 -- language. Of course ideally, we should detect this before bombing
119 -- on e.g. an assertion error, but in practice most of these bombs
120 -- are due to a legitimate case of a construct not being supported (in
121 -- a sense they all are, since for sure we are not supporting something
122 -- if we bomb!) By giving this message, we provide a more reasonable
123 -- practical interface, since giving scary bug boxes on unsupported
124 -- features is definitely not helpful.
126 -- Note that the call to Error_Msg_N below sets Serious_Errors_Detected
127 -- to 1, so we use the regular mechanism below in order to display a
128 -- "compilation abandoned" message and exit, so we still know we have
129 -- this case (and -gnatdk can still be used to get the bug box).
131 if VM_Target = CLI_Target
132 and then Serious_Errors_Detected = 0
133 and then not Debug_Flag_K
134 and then Sloc (Current_Error_Node) > No_Location
137 ("unsupported construct in this context",
141 -- If any errors have already occurred, then we guess that the abort
142 -- may well be caused by previous errors, and we don't make too much
143 -- fuss about it, since we want to let programmer fix the errors first.
145 -- Debug flag K disables this behavior (useful for debugging)
147 if Serious_Errors_Detected /= 0 and then not Debug_Flag_K then
148 Errout.Finalize (Last_Call => True);
149 Errout.Output_Messages;
152 Write_Str ("compilation abandoned due to previous error");
158 Exit_Program (E_Errors);
160 -- Otherwise give message with details of the abort
165 -- Generate header for bug box
168 Repeat_Char ('=', 29, 'G');
169 Write_Str ("NAT BUG DETECTED");
170 Repeat_Char ('=', 76, '+');
173 -- Output GNAT version identification
176 Write_Str (Gnat_Version_String);
179 -- Output target name, deleting junk final reverse slash
181 if Target_Name.all (Target_Name.all'Last) = '\'
182 or else Target_Name.all (Target_Name.all'Last) = '/'
184 Write_Str (Target_Name.all (1 .. Target_Name.all'Last - 1));
186 Write_Str (Target_Name.all);
189 -- Output identification of error
193 if X'Length + Column > 76 then
195 Write_Str ("GCC error:");
203 if X'Length > 70 then
205 Last_Blank : Integer := 70;
208 for P in 39 .. 68 loop
209 if X (XF + P) = ' ' then
214 Write_Str (X (XF .. XF - 1 + Last_Blank));
217 Write_Str (X (XF + Last_Blank .. X'Last));
224 Write_Str (", Code=");
225 Write_Int (Int (Code));
229 -- For exception case, get exception message from the TSD. Note
230 -- that it would be neater and cleaner to pass the exception
231 -- message (obtained from Exception_Message) as a parameter to
232 -- Compiler_Abort, but we can't do this quite yet since it would
233 -- cause bootstrap path problems for 3.10 to 3.11.
236 Write_Str (Exception_Message (Get_Current_Excep.all.all));
241 -- Output source location information
243 if Sloc (Current_Error_Node) <= No_Location then
244 if Fallback_Loc'Length > 0 then
245 Write_Str ("| Error detected around ");
246 Write_Str (Fallback_Loc);
248 Write_Str ("| No source file position information available");
253 Write_Str ("| Error detected at ");
254 Write_Location (Sloc (Current_Error_Node));
258 -- There are two cases now. If the file gnat_bug.box exists,
259 -- we use the contents of this file at this point.
264 Src : Source_Buffer_Ptr;
268 Name_Buffer (1 .. 12) := "gnat_bug.box";
270 Read_Source_File (Name_Enter, 0, Hi, Src);
272 -- If we get a Src file, we use it
277 Outer : while Lo < Hi loop
281 exit Inner when Src (Lo) = ASCII.CR
282 or else Src (Lo) = ASCII.LF;
283 Write_Char (Src (Lo));
290 and then (Src (Lo) = ASCII.CR
291 or else Src (Lo) = ASCII.LF)
297 -- Otherwise we use the standard fixed text
300 if Is_FSF_Version then
302 ("| Please submit a bug report; see" &
303 " http://gcc.gnu.org/bugs.html.");
306 elsif Is_GPL_Version then
309 ("| Please submit a bug report by email " &
310 "to report@adacore.com.");
314 ("| GAP members can alternatively use GNAT Tracker:");
318 ("| http://www.adacore.com/ " &
319 "section 'send a report'.");
323 ("| See gnatinfo.txt for full info on procedure " &
324 "for submitting bugs.");
329 ("| Please submit a bug report using GNAT Tracker:");
333 ("| http://www.adacore.com/gnattracker/ " &
334 "section 'send a report'.");
338 ("| alternatively submit a bug report by email " &
339 "to report@adacore.com,");
343 ("| including your customer number #nnn " &
344 "in the subject line.");
349 ("| Use a subject line meaningful to you" &
350 " and us to track the bug.");
354 ("| Include the entire contents of this bug " &
355 "box in the report.");
359 ("| Include the exact gcc or gnatmake command " &
360 "that you entered.");
364 ("| Also include sources listed below in gnatchop format");
368 ("| (concatenated together with no headers between files).");
371 if not Is_FSF_Version then
373 ("| Use plain ASCII or MIME attachment.");
379 -- Complete output of bug box
382 Repeat_Char ('=', 76, '+');
388 Print_Tree_Node (Current_Error_Node);
394 Write_Line ("Please include these source files with error report");
395 Write_Line ("Note that list may not be accurate in some cases, ");
396 Write_Line ("so please double check that the problem can still ");
397 Write_Line ("be reproduced with the set of files listed.");
400 for U in Main_Unit .. Last_Unit loop
402 if not Is_Internal_File_Name
403 (File_Name (Source_Index (U)))
405 Write_Name (Full_File_Name (Source_Index (U)));
409 -- No point in double bug box if we blow up trying to print
410 -- the list of file names! Output informative msg and quit.
414 Write_Str ("list may be incomplete");
424 raise Unrecoverable_Error;
433 procedure Repeat_Char (Char : Character; Col : Nat; After : Character) is
435 while Column < Col loop