1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2009, 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 Gnatvsn; use Gnatvsn;
34 with Namet; use Namet;
35 with Osint; use Osint;
36 with Output; use Output;
37 with Sinput; use Sinput;
38 with Sprint; use Sprint;
39 with Sdefault; use Sdefault;
40 with Targparm; use Targparm;
41 with Treepr; use Treepr;
42 with Types; use Types;
44 with Ada.Exceptions; use Ada.Exceptions;
46 with System.Soft_Links; use System.Soft_Links;
48 package body Comperr is
54 Abort_In_Progress : Boolean := False;
55 -- Used to prevent runaway recursion if something segfaults
56 -- while processing a previous abort.
58 -----------------------
59 -- Local Subprograms --
60 -----------------------
62 procedure Repeat_Char (Char : Character; Col : Nat; After : Character);
63 -- Output Char until current column is at or past Col, and then output
64 -- the character given by After (if column is already past Col on entry,
65 -- then the effect is simply to output the After character).
71 procedure Compiler_Abort
74 Fallback_Loc : String := "")
76 -- The procedures below output a "bug box" with information about
77 -- the cause of the compiler abort and about the preferred method
78 -- of reporting bugs. The default is a bug box appropriate for
79 -- the FSF version of GNAT, but there are specializations for
80 -- the GNATPRO and Public releases by AdaCore.
82 XF : constant Positive := X'First;
83 -- Start index, usually 1, but we won't assume this
86 -- Add blanks up to column 76, and then a final vertical bar
94 Repeat_Char (' ', 76, '|');
98 Is_GPL_Version : constant Boolean := Gnatvsn.Build_Type = GPL;
99 Is_FSF_Version : constant Boolean := Gnatvsn.Build_Type = FSF;
101 -- Start of processing for Compiler_Abort
104 Cancel_Special_Output;
106 -- Prevent recursion through Compiler_Abort, e.g. via SIGSEGV
108 if Abort_In_Progress then
109 Exit_Program (E_Abort);
112 Abort_In_Progress := True;
114 -- Generate a "standard" error message instead of a bug box in case of
115 -- .NET compiler, since we do not support all constructs of the
116 -- language. Of course ideally, we should detect this before bombing
117 -- on e.g. an assertion error, but in practice most of these bombs
118 -- are due to a legitimate case of a construct not being supported (in
119 -- a sense they all are, since for sure we are not supporting something
120 -- if we bomb!) By giving this message, we provide a more reasonable
121 -- practical interface, since giving scary bug boxes on unsupported
122 -- features is definitely not helpful.
124 -- Note that the call to Error_Msg_N below sets Serious_Errors_Detected
125 -- to 1, so we use the regular mechanism below in order to display a
126 -- "compilation abandoned" message and exit, so we still know we have
127 -- this case (and -gnatdk can still be used to get the bug box).
129 if VM_Target = CLI_Target
130 and then Serious_Errors_Detected = 0
131 and then not Debug_Flag_K
132 and then Sloc (Current_Error_Node) > No_Location
135 ("unsupported construct in this context",
139 -- If any errors have already occurred, then we guess that the abort
140 -- may well be caused by previous errors, and we don't make too much
141 -- fuss about it, since we want to let programmer fix the errors first.
143 -- Debug flag K disables this behavior (useful for debugging)
145 if Serious_Errors_Detected /= 0 and then not Debug_Flag_K then
146 Errout.Finalize (Last_Call => True);
147 Errout.Output_Messages;
150 Write_Str ("compilation abandoned due to previous error");
156 Exit_Program (E_Errors);
158 -- Otherwise give message with details of the abort
163 -- Generate header for bug box
166 Repeat_Char ('=', 29, 'G');
167 Write_Str ("NAT BUG DETECTED");
168 Repeat_Char ('=', 76, '+');
171 -- Output GNAT version identification
174 Write_Str (Gnat_Version_String);
177 -- Output target name, deleting junk final reverse slash
179 if Target_Name.all (Target_Name.all'Last) = '\'
180 or else Target_Name.all (Target_Name.all'Last) = '/'
182 Write_Str (Target_Name.all (1 .. Target_Name.all'Last - 1));
184 Write_Str (Target_Name.all);
187 -- Output identification of error
191 if X'Length + Column > 76 then
193 Write_Str ("GCC error:");
201 if X'Length > 70 then
203 Last_Blank : Integer := 70;
206 for P in 39 .. 68 loop
207 if X (XF + P) = ' ' then
212 Write_Str (X (XF .. XF - 1 + Last_Blank));
215 Write_Str (X (XF + Last_Blank .. X'Last));
222 Write_Str (", Code=");
223 Write_Int (Int (Code));
227 -- For exception case, get exception message from the TSD. Note
228 -- that it would be neater and cleaner to pass the exception
229 -- message (obtained from Exception_Message) as a parameter to
230 -- Compiler_Abort, but we can't do this quite yet since it would
231 -- cause bootstrap path problems for 3.10 to 3.11.
234 Write_Str (Exception_Message (Get_Current_Excep.all.all));
239 -- Output source location information
241 if Sloc (Current_Error_Node) <= No_Location then
242 if Fallback_Loc'Length > 0 then
243 Write_Str ("| Error detected around ");
244 Write_Str (Fallback_Loc);
246 Write_Str ("| No source file position information available");
251 Write_Str ("| Error detected at ");
252 Write_Location (Sloc (Current_Error_Node));
256 -- There are two cases now. If the file gnat_bug.box exists,
257 -- we use the contents of this file at this point.
262 Src : Source_Buffer_Ptr;
266 Name_Buffer (1 .. 12) := "gnat_bug.box";
268 Read_Source_File (Name_Enter, 0, Hi, Src);
270 -- If we get a Src file, we use it
275 Outer : while Lo < Hi loop
279 exit Inner when Src (Lo) = ASCII.CR
280 or else Src (Lo) = ASCII.LF;
281 Write_Char (Src (Lo));
288 and then (Src (Lo) = ASCII.CR
289 or else Src (Lo) = ASCII.LF)
295 -- Otherwise we use the standard fixed text
298 if Is_FSF_Version then
300 ("| Please submit a bug report; see" &
301 " http://gcc.gnu.org/bugs.html.");
304 elsif Is_GPL_Version then
307 ("| Please submit a bug report by email " &
308 "to report@adacore.com.");
312 ("| GAP members can alternatively use GNAT Tracker:");
316 ("| http://www.adacore.com/ " &
317 "section 'send a report'.");
321 ("| See gnatinfo.txt for full info on procedure " &
322 "for submitting bugs.");
327 ("| Please submit a bug report using GNAT Tracker:");
331 ("| http://www.adacore.com/gnattracker/ " &
332 "section 'send a report'.");
336 ("| alternatively submit a bug report by email " &
337 "to report@adacore.com,");
341 ("| including your customer number #nnn " &
342 "in the subject line.");
347 ("| Use a subject line meaningful to you" &
348 " and us to track the bug.");
352 ("| Include the entire contents of this bug " &
353 "box in the report.");
357 ("| Include the exact gcc or gnatmake command " &
358 "that you entered.");
362 ("| Also include sources listed below in gnatchop format");
366 ("| (concatenated together with no headers between files).");
369 if not Is_FSF_Version then
371 ("| Use plain ASCII or MIME attachment.");
377 -- Complete output of bug box
380 Repeat_Char ('=', 76, '+');
386 Print_Tree_Node (Current_Error_Node);
392 Write_Line ("Please include these source files with error report");
393 Write_Line ("Note that list may not be accurate in some cases, ");
394 Write_Line ("so please double check that the problem can still ");
395 Write_Line ("be reproduced with the set of files listed.");
396 Write_Line ("Consider also -gnatd.n switch (see debug.adb).");
400 Dump_Source_File_Names;
402 -- If we blow up trying to print the list of file names, just output
403 -- informative msg and continue.
407 Write_Str ("list may be incomplete");
415 raise Unrecoverable_Error;
424 procedure Repeat_Char (Char : Character; Col : Nat; After : Character) is
426 while Column < Col loop