1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2011, 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 error
27 -- is detected. Calls to these routines cause termination of the current
28 -- 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;
35 with Namet; use Namet;
37 with Osint; use Osint;
38 with Output; use Output;
39 with Sinfo; use Sinfo;
40 with Sinput; use Sinput;
41 with Sprint; use Sprint;
42 with Sdefault; use Sdefault;
43 with Targparm; use Targparm;
44 with Treepr; use Treepr;
45 with Types; use Types;
47 with Ada.Exceptions; use Ada.Exceptions;
49 with System.OS_Lib; use System.OS_Lib;
50 with System.Soft_Links; use System.Soft_Links;
52 package body Comperr is
58 Abort_In_Progress : Boolean := False;
59 -- Used to prevent runaway recursion if something segfaults
60 -- while processing a previous abort.
62 -----------------------
63 -- Local Subprograms --
64 -----------------------
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).
75 procedure Compiler_Abort
78 Fallback_Loc : String := "")
80 -- The procedures below output a "bug box" with information about
81 -- the cause of the compiler abort and about the preferred method
82 -- of reporting bugs. The default is a bug box appropriate for
83 -- the FSF version of GNAT, but there are specializations for
84 -- the GNATPRO and Public releases by AdaCore.
86 XF : constant Positive := X'First;
87 -- Start index, usually 1, but we won't assume this
90 -- Add blanks up to column 76, and then a final vertical bar
98 Repeat_Char (' ', 76, '|');
102 Is_GPL_Version : constant Boolean := Gnatvsn.Build_Type = GPL;
103 Is_FSF_Version : constant Boolean := Gnatvsn.Build_Type = FSF;
105 -- Start of processing for Compiler_Abort
108 Cancel_Special_Output;
110 -- Prevent recursion through Compiler_Abort, e.g. via SIGSEGV
112 if Abort_In_Progress then
113 Exit_Program (E_Abort);
116 Abort_In_Progress := True;
118 -- Generate a "standard" error message instead of a bug box in case of
119 -- .NET compiler, since we do not support all constructs of the
120 -- language. Of course ideally, we should detect this before bombing
121 -- on e.g. an assertion error, but in practice most of these bombs
122 -- are due to a legitimate case of a construct not being supported (in
123 -- a sense they all are, since for sure we are not supporting something
124 -- if we bomb!) By giving this message, we provide a more reasonable
125 -- practical interface, since giving scary bug boxes on unsupported
126 -- features is definitely not helpful.
128 -- Similarly if we are generating SCIL, an error message is sufficient
129 -- instead of generating a bug box.
131 -- Note that the call to Error_Msg_N below sets Serious_Errors_Detected
132 -- to 1, so we use the regular mechanism below in order to display a
133 -- "compilation abandoned" message and exit, so we still know we have
134 -- this case (and -gnatdk can still be used to get the bug box).
136 if (VM_Target = CLI_Target or else CodePeer_Mode)
137 and then Serious_Errors_Detected = 0
138 and then not Debug_Flag_K
139 and then Sloc (Current_Error_Node) > No_Location
141 if VM_Target = CLI_Target then
143 ("unsupported construct in this context",
146 Error_Msg_N ("cannot generate 'S'C'I'L", Current_Error_Node);
150 -- If we are in CodePeer mode, we must also delete SCIL files
152 if CodePeer_Mode then
156 -- If any errors have already occurred, then we guess that the abort
157 -- may well be caused by previous errors, and we don't make too much
158 -- fuss about it, since we want to let programmer fix the errors first.
160 -- Debug flag K disables this behavior (useful for debugging)
162 if Serious_Errors_Detected /= 0 and then not Debug_Flag_K then
163 Errout.Finalize (Last_Call => True);
164 Errout.Output_Messages;
167 Write_Str ("compilation abandoned due to previous error");
173 Exit_Program (E_Errors);
175 -- Otherwise give message with details of the abort
180 -- Generate header for bug box
183 Repeat_Char ('=', 29, 'G');
184 Write_Str ("NAT BUG DETECTED");
185 Repeat_Char ('=', 76, '+');
188 -- Output GNAT version identification
191 Write_Str (Gnat_Version_String);
194 -- Output target name, deleting junk final reverse slash
196 if Target_Name.all (Target_Name.all'Last) = '\'
197 or else Target_Name.all (Target_Name.all'Last) = '/'
199 Write_Str (Target_Name.all (1 .. Target_Name.all'Last - 1));
201 Write_Str (Target_Name.all);
204 -- Output identification of error
208 if X'Length + Column > 76 then
210 Write_Str ("GCC error:");
218 if X'Length > 70 then
220 Last_Blank : Integer := 70;
223 for P in 39 .. 68 loop
224 if X (XF + P) = ' ' then
229 Write_Str (X (XF .. XF - 1 + Last_Blank));
232 Write_Str (X (XF + Last_Blank .. X'Last));
239 Write_Str (", Code=");
240 Write_Int (Int (Code));
244 -- For exception case, get exception message from the TSD. Note
245 -- that it would be neater and cleaner to pass the exception
246 -- message (obtained from Exception_Message) as a parameter to
247 -- Compiler_Abort, but we can't do this quite yet since it would
248 -- cause bootstrap path problems for 3.10 to 3.11.
251 Write_Str (Exception_Message (Get_Current_Excep.all.all));
256 -- Output source location information
258 if Sloc (Current_Error_Node) <= No_Location then
259 if Fallback_Loc'Length > 0 then
260 Write_Str ("| Error detected around ");
261 Write_Str (Fallback_Loc);
263 Write_Str ("| No source file position information available");
268 Write_Str ("| Error detected at ");
269 Write_Location (Sloc (Current_Error_Node));
273 -- There are two cases now. If the file gnat_bug.box exists,
274 -- we use the contents of this file at this point.
279 Src : Source_Buffer_Ptr;
283 Name_Buffer (1 .. 12) := "gnat_bug.box";
285 Read_Source_File (Name_Enter, 0, Hi, Src);
287 -- If we get a Src file, we use it
292 Outer : while Lo < Hi loop
296 exit Inner when Src (Lo) = ASCII.CR
297 or else Src (Lo) = ASCII.LF;
298 Write_Char (Src (Lo));
305 and then (Src (Lo) = ASCII.CR
306 or else Src (Lo) = ASCII.LF)
312 -- Otherwise we use the standard fixed text
315 if Is_FSF_Version then
317 ("| Please submit a bug report; see" &
318 " http://gcc.gnu.org/bugs.html.");
321 elsif Is_GPL_Version then
324 ("| Please submit a bug report by email " &
325 "to report@adacore.com.");
329 ("| GAP members can alternatively use GNAT Tracker:");
333 ("| http://www.adacore.com/ " &
334 "section 'send a report'.");
338 ("| See gnatinfo.txt for full info on procedure " &
339 "for submitting bugs.");
344 ("| Please submit a bug report using GNAT Tracker:");
348 ("| http://www.adacore.com/gnattracker/ " &
349 "section 'send a report'.");
353 ("| alternatively submit a bug report by email " &
354 "to report@adacore.com,");
358 ("| including your customer number #nnn " &
359 "in the subject line.");
364 ("| Use a subject line meaningful to you" &
365 " and us to track the bug.");
369 ("| Include the entire contents of this bug " &
370 "box in the report.");
374 ("| Include the exact gcc or gnatmake command " &
375 "that you entered.");
379 ("| Also include sources listed below in gnatchop format");
383 ("| (concatenated together with no headers between files).");
386 if not Is_FSF_Version then
388 ("| Use plain ASCII or MIME attachment.");
394 -- Complete output of bug box
397 Repeat_Char ('=', 76, '+');
403 Print_Tree_Node (Current_Error_Node);
409 Write_Line ("Please include these source files with error report");
410 Write_Line ("Note that list may not be accurate in some cases, ");
411 Write_Line ("so please double check that the problem can still ");
412 Write_Line ("be reproduced with the set of files listed.");
413 Write_Line ("Consider also -gnatd.n switch (see debug.adb).");
417 Dump_Source_File_Names;
419 -- If we blow up trying to print the list of file names, just output
420 -- informative msg and continue.
424 Write_Str ("list may be incomplete");
432 raise Unrecoverable_Error;
436 -----------------------
437 -- Delete_SCIL_Files --
438 -----------------------
440 procedure Delete_SCIL_Files is
443 pragma Unreferenced (Success);
446 -- If parsing was not successful, no Main_Unit is available, so return
449 if Main_Source_File = No_Source_File then
453 -- Retrieve unit name, and remove old versions of SCIL/<unit>.scil and
454 -- SCIL/<unit>__body.scil
456 Main := Unit (Cunit (Main_Unit));
458 if Nkind (Main) = N_Subprogram_Body then
459 Get_Name_String (Chars (Defining_Unit_Name (Specification (Main))));
461 Get_Name_String (Chars (Defining_Unit_Name (Main)));
465 ("SCIL/" & Name_Buffer (1 .. Name_Len) & ".scil", Success);
467 ("SCIL/" & Name_Buffer (1 .. Name_Len) & "__body.scil", Success);
468 end Delete_SCIL_Files;
474 procedure Repeat_Char (Char : Character; Col : Nat; After : Character) is
476 while Column < Col loop