File : g-trasym.adb
------------------------------------------------------------------------------
-- --
-- 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 --
-- --
-- $Revision: 1.5 $
-- --
-- Copyright (C) 1999 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
-- This file has been modified by Juergen Pfeifer (31-Dec-1999) for
-- the purpose to support the Ada for Linux Team implementation of
-- convert_addresses. This implementation has the advantage to run
-- on the binutils as they are deployed on Linux.
with System.Soft_Links;
with Ada.Exceptions.Traceback; use Ada.Exceptions.Traceback;
package body GNAT.Traceback.Symbolic is
package TSL renames System.Soft_Links;
------------------------
-- Symbolic_Traceback --
------------------------
function Symbolic_Traceback (Traceback : Tracebacks_Array) return String is
procedure convert_addresses
(addrs : System.Address;
n_addr : Integer;
buf : System.Address;
len : System.Address);
pragma Import (C, convert_addresses, "convert_addresses");
-- This is the ALT Linux specific version adapted to the binutils
-- deployed with most Linuxes. These binutils already have an
-- addr2line tool that demangles Ada symbolic names, but there are
-- version dependant variants for the option names. Therefore our
-- implementation spawns a shell script that does normalization of
-- the option and then executes addr2line and communicates with it
-- through a bidirectional pipe.
--
-- Note that this procedure is *not* thread-safe.
B_Size : constant Integer := 256 * Traceback'Length;
Len : Integer := B_Size;
Res : String (1 .. B_Size);
begin
if Traceback'Length > 0 then
TSL.Lock_Task.all;
convert_addresses
(Traceback'Address, Traceback'Length, Res (1)'Address, Len'Address);
TSL.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;