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|
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- C O M P E R R --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2016, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING3. If not, go to --
-- http://www.gnu.org/licenses for a complete copy of the license. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by AdaCore. --
-- --
------------------------------------------------------------------------------
-- This package contains routines called when a fatal internal compiler error
-- is detected. Calls to these routines cause termination of the current
-- compilation with appropriate error output.
with Atree; use Atree;
with Debug; use Debug;
with Errout; use Errout;
with Gnatvsn; use Gnatvsn;
with Lib; use Lib;
with Namet; use Namet;
with Opt; use Opt;
with Osint; use Osint;
with Output; use Output;
with Sinfo; use Sinfo;
with Sinput; use Sinput;
with Sprint; use Sprint;
with Sdefault; use Sdefault;
with Treepr; use Treepr;
with Types; use Types;
with Ada.Exceptions; use Ada.Exceptions;
with System.OS_Lib; use System.OS_Lib;
with System.Soft_Links; use System.Soft_Links;
package body Comperr is
----------------
-- Local Data --
----------------
Abort_In_Progress : Boolean := False;
-- Used to prevent runaway recursion if something segfaults
-- while processing a previous abort.
-----------------------
-- Local Subprograms --
-----------------------
procedure Repeat_Char (Char : Character; Col : Nat; After : Character);
-- Output Char until current column is at or past Col, and then output
-- the character given by After (if column is already past Col on entry,
-- then the effect is simply to output the After character).
--------------------
-- Compiler_Abort --
--------------------
procedure Compiler_Abort
(X : String;
Fallback_Loc : String := "";
From_GCC : Boolean := False)
is
-- The procedures below output a "bug box" with information about
-- the cause of the compiler abort and about the preferred method
-- of reporting bugs. The default is a bug box appropriate for
-- the FSF version of GNAT, but there are specializations for
-- the GNATPRO and Public releases by AdaCore.
XF : constant Positive := X'First;
-- Start index, usually 1, but we won't assume this
procedure End_Line;
-- Add blanks up to column 76, and then a final vertical bar
--------------
-- End_Line --
--------------
procedure End_Line is
begin
Repeat_Char (' ', 76, '|');
Write_Eol;
end End_Line;
Is_GPL_Version : constant Boolean := Gnatvsn.Build_Type = GPL;
Is_FSF_Version : constant Boolean := Gnatvsn.Build_Type = FSF;
-- Start of processing for Compiler_Abort
begin
Cancel_Special_Output;
-- Prevent recursion through Compiler_Abort, e.g. via SIGSEGV
if Abort_In_Progress then
Exit_Program (E_Abort);
end if;
Abort_In_Progress := True;
-- Generate a "standard" error message instead of a bug box in case
-- of CodePeer rather than generating a bug box, friendlier.
-- Note that the call to Error_Msg_N below sets Serious_Errors_Detected
-- to 1, so we use the regular mechanism below in order to display a
-- "compilation abandoned" message and exit, so we still know we have
-- this case (and -gnatdk can still be used to get the bug box).
if CodePeer_Mode
and then Serious_Errors_Detected = 0
and then not Debug_Flag_K
and then Sloc (Current_Error_Node) > No_Location
then
Error_Msg_N ("cannot generate 'S'C'I'L", Current_Error_Node);
end if;
-- If we are in CodePeer mode, we must also delete SCIL files
if CodePeer_Mode then
Delete_SCIL_Files;
end if;
-- If any errors have already occurred, then we guess that the abort
-- may well be caused by previous errors, and we don't make too much
-- fuss about it, since we want to let programmer fix the errors first.
-- Debug flag K disables this behavior (useful for debugging)
if Serious_Errors_Detected /= 0 and then not Debug_Flag_K then
Errout.Finalize (Last_Call => True);
Errout.Output_Messages;
Set_Standard_Error;
Write_Str ("compilation abandoned due to previous error");
Write_Eol;
Set_Standard_Output;
Source_Dump;
Tree_Dump;
Exit_Program (E_Errors);
-- Otherwise give message with details of the abort
else
Set_Standard_Error;
-- Generate header for bug box
Write_Char ('+');
Repeat_Char ('=', 29, 'G');
Write_Str ("NAT BUG DETECTED");
Repeat_Char ('=', 76, '+');
Write_Eol;
-- Output GNAT version identification
Write_Str ("| ");
Write_Str (Gnat_Version_String);
Write_Str (" (");
-- Output target name, deleting junk final reverse slash
if Target_Name.all (Target_Name.all'Last) = '\'
or else Target_Name.all (Target_Name.all'Last) = '/'
then
Write_Str (Target_Name.all (1 .. Target_Name.all'Last - 1));
else
Write_Str (Target_Name.all);
end if;
-- Output identification of error
Write_Str (") ");
if X'Length + Column > 76 then
if From_GCC then
Write_Str ("GCC error:");
end if;
End_Line;
Write_Str ("| ");
end if;
if X'Length > 70 then
declare
Last_Blank : Integer := 70;
begin
for P in 39 .. 68 loop
if X (XF + P) = ' ' then
Last_Blank := P;
end if;
end loop;
Write_Str (X (XF .. XF - 1 + Last_Blank));
End_Line;
Write_Str ("| ");
Write_Str (X (XF + Last_Blank .. X'Last));
end;
else
Write_Str (X);
end if;
if not From_GCC then
-- For exception case, get exception message from the TSD. Note
-- that it would be neater and cleaner to pass the exception
-- message (obtained from Exception_Message) as a parameter to
-- Compiler_Abort, but we can't do this quite yet since it would
-- cause bootstrap path problems for 3.10 to 3.11.
Write_Char (' ');
Write_Str (Exception_Message (Get_Current_Excep.all.all));
end if;
End_Line;
-- Output source location information
if Sloc (Current_Error_Node) <= No_Location then
if Fallback_Loc'Length > 0 then
Write_Str ("| Error detected around ");
Write_Str (Fallback_Loc);
else
Write_Str ("| No source file position information available");
end if;
End_Line;
else
Write_Str ("| Error detected at ");
Write_Location (Sloc (Current_Error_Node));
End_Line;
end if;
-- There are two cases now. If the file gnat_bug.box exists,
-- we use the contents of this file at this point.
declare
FD : File_Descriptor;
Lo : Source_Ptr;
Hi : Source_Ptr;
Src : Source_Buffer_Ptr;
begin
Namet.Unlock;
Name_Buffer (1 .. 12) := "gnat_bug.box";
Name_Len := 12;
Read_Source_File (Name_Enter, 0, Hi, Src, FD);
-- If we get a Src file, we use it
if not Null_Source_Buffer_Ptr (Src) then
Lo := 0;
Outer : while Lo < Hi loop
Write_Str ("| ");
Inner : loop
exit Inner when Src (Lo) = ASCII.CR
or else Src (Lo) = ASCII.LF;
Write_Char (Src (Lo));
Lo := Lo + 1;
end loop Inner;
End_Line;
while Lo <= Hi
and then (Src (Lo) = ASCII.CR
or else Src (Lo) = ASCII.LF)
loop
Lo := Lo + 1;
end loop;
end loop Outer;
-- Otherwise we use the standard fixed text
else
if Is_FSF_Version then
Write_Str
("| Please submit a bug report; see" &
" https://gcc.gnu.org/bugs/ .");
End_Line;
elsif Is_GPL_Version then
Write_Str
("| Please submit a bug report by email " &
"to report@adacore.com.");
End_Line;
Write_Str
("| GAP members can alternatively use GNAT Tracker:");
End_Line;
Write_Str
("| http://www.adacore.com/ " &
"section 'send a report'.");
End_Line;
Write_Str
("| See gnatinfo.txt for full info on procedure " &
"for submitting bugs.");
End_Line;
else
Write_Str
("| Please submit a bug report using GNAT Tracker:");
End_Line;
Write_Str
("| http://www.adacore.com/gnattracker/ " &
"section 'send a report'.");
End_Line;
Write_Str
("| alternatively submit a bug report by email " &
"to report@adacore.com,");
End_Line;
Write_Str
("| including your customer number #nnn " &
"in the subject line.");
End_Line;
end if;
Write_Str
("| Use a subject line meaningful to you" &
" and us to track the bug.");
End_Line;
Write_Str
("| Include the entire contents of this bug " &
"box in the report.");
End_Line;
Write_Str
("| Include the exact command that you entered.");
End_Line;
Write_Str
("| Also include sources listed below.");
End_Line;
if not Is_FSF_Version then
Write_Str
("| Use plain ASCII or MIME attachment(s).");
End_Line;
end if;
end if;
end;
-- Complete output of bug box
Write_Char ('+');
Repeat_Char ('=', 76, '+');
Write_Eol;
if Debug_Flag_3 then
Write_Eol;
Write_Eol;
Print_Tree_Node (Current_Error_Node);
Write_Eol;
end if;
Write_Eol;
Write_Line ("Please include these source files with error report");
Write_Line ("Note that list may not be accurate in some cases, ");
Write_Line ("so please double check that the problem can still ");
Write_Line ("be reproduced with the set of files listed.");
Write_Line ("Consider also -gnatd.n switch (see debug.adb).");
Write_Eol;
begin
Dump_Source_File_Names;
-- If we blow up trying to print the list of file names, just output
-- informative msg and continue.
exception
when others =>
Write_Str ("list may be incomplete");
end;
Write_Eol;
Set_Standard_Output;
Tree_Dump;
Source_Dump;
raise Unrecoverable_Error;
end if;
end Compiler_Abort;
-----------------------
-- Delete_SCIL_Files --
-----------------------
procedure Delete_SCIL_Files is
Main : Node_Id;
Unit_Name : Node_Id;
Success : Boolean;
pragma Unreferenced (Success);
procedure Decode_Name_Buffer;
-- Replace "__" by "." in Name_Buffer, and adjust Name_Len accordingly
------------------------
-- Decode_Name_Buffer --
------------------------
procedure Decode_Name_Buffer is
J : Natural;
K : Natural;
begin
J := 1;
K := 0;
while J <= Name_Len loop
K := K + 1;
if J < Name_Len
and then Name_Buffer (J) = '_'
and then Name_Buffer (J + 1) = '_'
then
Name_Buffer (K) := '.';
J := J + 1;
else
Name_Buffer (K) := Name_Buffer (J);
end if;
J := J + 1;
end loop;
Name_Len := K;
end Decode_Name_Buffer;
-- Start of processing for Delete_SCIL_Files
begin
-- If parsing was not successful, no Main_Unit is available, so return
-- immediately.
if Main_Source_File <= No_Source_File then
return;
end if;
-- Retrieve unit name, and remove old versions of SCIL/<unit>.scil and
-- SCIL/<unit>__body.scil, ditto for .scilx files.
Main := Unit (Cunit (Main_Unit));
case Nkind (Main) is
when N_Package_Declaration
| N_Subprogram_Body
| N_Subprogram_Declaration
=>
Unit_Name := Defining_Unit_Name (Specification (Main));
when N_Package_Body =>
Unit_Name := Corresponding_Spec (Main);
when N_Package_Instantiation
| N_Package_Renaming_Declaration
=>
Unit_Name := Defining_Unit_Name (Main);
-- No SCIL file generated for generic package declarations
when N_Generic_Package_Declaration =>
return;
-- Should never happen, but can be ignored in production
when others =>
pragma Assert (False);
return;
end case;
case Nkind (Unit_Name) is
when N_Defining_Identifier =>
Get_Name_String (Chars (Unit_Name));
when N_Defining_Program_Unit_Name =>
Get_Name_String (Chars (Defining_Identifier (Unit_Name)));
Decode_Name_Buffer;
-- Should never happen, but can be ignored in production
when others =>
pragma Assert (False);
return;
end case;
Delete_File
("SCIL/" & Name_Buffer (1 .. Name_Len) & ".scil", Success);
Delete_File
("SCIL/" & Name_Buffer (1 .. Name_Len) & ".scilx", Success);
Delete_File
("SCIL/" & Name_Buffer (1 .. Name_Len) & "__body.scil", Success);
Delete_File
("SCIL/" & Name_Buffer (1 .. Name_Len) & "__body.scilx", Success);
end Delete_SCIL_Files;
-----------------
-- Repeat_Char --
-----------------
procedure Repeat_Char (Char : Character; Col : Nat; After : Character) is
begin
while Column < Col loop
Write_Char (Char);
end loop;
Write_Char (After);
end Repeat_Char;
end Comperr;
|