gcc/ada/s-traent.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --              S Y S T E M . T R A C E B A C K _ E N T R I E S             --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --             Copyright (C) 2003 Free Software Foundation, Inc.            --
  10 --                                                                          --
  11 -- This specification is derived from the Ada Reference Manual for use with --
  12 -- GNAT. The copyright notice above, and the license provisions that follow --
  13 -- apply solely to the  contents of the part following the private keyword. --
  14 --                                                                          --
  15 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  16 -- terms of the  GNU General Public License as published  by the Free Soft- --
  17 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  18 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  19 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  20 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  21 -- for  more details.  You should have  received  a copy of the GNU General --
  22 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  23 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  24 -- MA 02111-1307, USA.                                                      --
  25 --                                                                          --
  26 -- As a special exception,  if other files  instantiate  generics from this --
  27 -- unit, or you link  this unit with other files  to produce an executable, --
  28 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  29 -- covered  by the  GNU  General  Public  License.  This exception does not --
  30 -- however invalidate  any other reasons why  the executable file  might be --
  31 -- covered by the  GNU Public License.                                      --
  32 --                                                                          --
  33 -- GNAT was originally developed  by the GNAT team at  New York University. --
  34 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  35 --                                                                          --
  36 ------------------------------------------------------------------------------
  37
  38 --  This package offers an abstraction of what is stored in traceback arrays
  39 --  for call-chain computation purposes. By default, as defined in this
  40 --  version of the package, an entry is a mere code location representing the
  41 --  address of a call instruction part of the call-chain.
  42
  43 package System.Traceback_Entries is
  44
  45    subtype Traceback_Entry is System.Address;
  46    --  This subtype defines what each traceback array entry contains.
  47
  48    Null_TB_Entry : constant Traceback_Entry := System.Null_Address;
  49    --  This is the value to be used when initializing an entry.
  50
  51    function PC_For (TB_Entry : Traceback_Entry) return System.Address;
  52    pragma Inline (PC_For);
  53    --  Returns the address of the call instruction associated with the
  54    --  provided entry.
  55
  56    function TB_Entry_For (PC : System.Address) return Traceback_Entry;
  57    pragma Inline (TB_Entry_For);
  58    --  Returns an entry representing a frame for a call instruction at PC.
  59
  60 end System.Traceback_Entries;
  61
  62