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