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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- G N A T . T R A C E B A C K . S Y M B O L I C --
-- --
-- B o d y --
-- --
-- Copyright (C) 1999-2003 Ada Core Technologies, 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 2, 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 COPYING. If not, write --
-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNAT is maintained by Ada Core Technologies Inc (http://www.gnat.com). --
-- --
------------------------------------------------------------------------------
-- Run-time symbolic traceback support for VMS
with Ada.Exceptions.Traceback; use Ada.Exceptions.Traceback;
with Interfaces.C;
with Interfaces.C.Strings;
with System;
with System.Aux_DEC;
with System.Soft_Links;
with System.Traceback_Entries;
package body GNAT.Traceback.Symbolic is
pragma Warnings (Off);
pragma Linker_Options ("--for-linker=sys$library:trace.exe");
use Interfaces.C.Strings;
use System;
use System.Aux_DEC;
use System.Traceback_Entries;
type Dscdef1_Type is record
Maxstrlen : Unsigned_Word;
Dtype : Unsigned_Byte;
Class : Unsigned_Byte;
Pointer : chars_ptr;
end record;
for Dscdef1_Type use record
Maxstrlen at 0 range 0 .. 15;
Dtype at 2 range 0 .. 7;
Class at 3 range 0 .. 7;
Pointer at 4 range 0 .. 31;
end record;
for Dscdef1_Type'Size use 64;
Image_Buf : String (1 .. 10240);
Image_Len : Integer;
Image_Need_Hdr : Boolean := True;
Image_Do_Another_Line : Boolean;
Image_Xtra_Msg : Boolean;
procedure Traceback_Image (Out_Desc : access Dscdef1_Type);
procedure Traceback_Image (Out_Desc : access Dscdef1_Type) is
Image : String (1 .. Integer (Out_Desc.Maxstrlen));
begin
Image := Value (Out_Desc.Pointer,
Interfaces.C.size_t (Out_Desc.Maxstrlen));
if Image_Do_Another_Line and then
(Image_Need_Hdr or else
Image (Image'First .. Image'First + 27) /=
" image module routine")
then
declare
First : Integer := Image_Len + 1;
Last : Integer := First + Image'Length - 1;
begin
Image_Buf (First .. Last + 1) := Image & ASCII.LF;
Image_Len := Last + 1;
end;
Image_Need_Hdr := False;
if Image (Image'First .. Image'First + 3) = "----" then
if Image_Xtra_Msg = False then
Image_Xtra_Msg := True;
else
Image_Xtra_Msg := False;
end if;
end if;
if Out_Desc.Maxstrlen = 79 and then not Image_Xtra_Msg then
Image_Len := Image_Len - 1;
Image_Do_Another_Line := False;
end if;
end if;
end Traceback_Image;
subtype User_Arg_Type is Unsigned_Longword;
subtype Cond_Value_Type is Unsigned_Longword;
procedure Show_Traceback
(Status : out Cond_Value_Type;
Faulting_FP : Address;
Faulting_SP : Address;
Faulting_PC : Address;
Detail_Level : Integer := Integer'Null_Parameter;
User_Act_Proc : Address := Address'Null_Parameter;
User_Arg_Value : User_Arg_Type := User_Arg_Type'Null_Parameter;
Exceptionn : Unsigned_Longword := Unsigned_Longword'Null_Parameter);
pragma Interface (External, Show_Traceback);
pragma Import_Valued_Procedure
(Show_Traceback, "TBK$SHOW_TRACEBACK",
(Cond_Value_Type, Address, Address, Address, Integer, Address,
User_Arg_Type, Unsigned_Longword),
(Value, Value, Value, Value, Reference, Value, Value, Reference),
Detail_Level);
------------------------
-- Symbolic_Traceback --
------------------------
function Symbolic_Traceback (Traceback : Tracebacks_Array) return String is
Res : String (1 .. 256 * Traceback'Length);
Len : Integer;
Status : Cond_Value_Type;
begin
if Traceback'Length > 0 then
Len := 0;
-- Since image computation is not thread-safe we need task lockout
System.Soft_Links.Lock_Task.all;
for I in Traceback'Range loop
Image_Len := 0;
Image_Do_Another_Line := True;
Image_Xtra_Msg := False;
Show_Traceback
(Status,
FP_For (Traceback (I)),
SP_For (Traceback (I)),
PC_For (Traceback (I)),
0,
Traceback_Image'Address);
declare
First : Integer := Len + 1;
Last : Integer := First + Image_Len - 1;
begin
Res (First .. Last + 1) := Image_Buf & ASCII.LF;
Len := Last + 1;
end;
end loop;
System.Soft_Links.Unlock_Task.all;
return Res (1 .. Len);
else
return "";
end if;
end Symbolic_Traceback;
function Symbolic_Traceback (E : Exception_Occurrence) return String is
begin
return Symbolic_Traceback (Tracebacks (E));
end Symbolic_Traceback;
end GNAT.Traceback.Symbolic;
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