gcc/ada/g-trasym.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --             G N A T . T R A C E B A C K . S Y M B O L I C                --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --           Copyright (C) 1999-2002 Ada Core Technologies, Inc.            --
  10 --                                                                          --
  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 2,  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 COPYING.  If not, write --
  19 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  20 -- MA 02111-1307, USA.                                                      --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT is maintained by Ada Core Technologies Inc (http://www.gnat.com).   --
  30 --                                                                          --
  31 ------------------------------------------------------------------------------
  32
  33 --  Run-time symbolic traceback support
  34
  35 with System.Soft_Links;
  36 with Ada.Exceptions.Traceback; use Ada.Exceptions.Traceback;
  37
  38 package body GNAT.Traceback.Symbolic is
  39
  40    pragma Linker_Options ("-laddr2line");
  41    pragma Linker_Options ("-lbfd");
  42    pragma Linker_Options ("-liberty");
  43
  44    package TSL renames System.Soft_Links;
  45
  46    ------------------------
  47    -- Symbolic_Traceback --
  48    ------------------------
  49
  50    function Symbolic_Traceback (Traceback : Tracebacks_Array) return String is
  51       procedure convert_addresses
  52         (addrs    : System.Address;
  53          n_addr   : Integer;
  54          buf      : System.Address;
  55          len      : System.Address);
  56       pragma Import (C, convert_addresses, "convert_addresses");
  57       --  This is the procedure version of the Ada aware addr2line that will
  58       --  use argv[0] as the executable containing the debug information.
  59       --  This procedure is provided by libaddr2line on targets that support
  60       --  it. A dummy version is in a-adaint.c for other targets so that build
  61       --  of shared libraries doesn't generate unresolved symbols.
  62       --
  63       --  Note that this procedure is *not* thread-safe.
  64
  65       Res : String (1 .. 256 * Traceback'Length);
  66       Len : Integer;
  67
  68    begin
  69       if Traceback'Length > 0 then
  70          TSL.Lock_Task.all;
  71          convert_addresses
  72            (Traceback'Address, Traceback'Length, Res (1)'Address, Len'Address);
  73          TSL.Unlock_Task.all;
  74          return Res (1 .. Len);
  75       else
  76          return "";
  77       end if;
  78    end Symbolic_Traceback;
  79
  80    function Symbolic_Traceback (E : Exception_Occurrence) return String is
  81    begin
  82       return Symbolic_Traceback (Tracebacks (E));
  83    end Symbolic_Traceback;
  84
  85 end GNAT.Traceback.Symbolic;