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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [ada/] [s-traceb.adb] - Blame information for rev 706

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1 706 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                         GNAT COMPILER COMPONENTS                         --
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--                                                                          --
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--                     S Y S T E M . T R A C E B A C K                      --
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--                                                                          --
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--                                 B o d y                                  --
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--                                                                          --
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--          Copyright (C) 1999-2009, 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.                                     --
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--                                                                          --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception,   --
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-- version 3.1, as published by the Free Software Foundation.               --
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--                                                                          --
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-- You should have received a copy of the GNU General Public License and    --
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-- a copy of the GCC Runtime Library Exception along with this program;     --
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-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
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-- <http://www.gnu.org/licenses/>.                                          --
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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 Ada Core Technologies Inc.      --
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--                                                                          --
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------------------------------------------------------------------------------
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--  This is the default version of this package
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--  Note: this unit must be compiled using -fno-optimize-sibling-calls.
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--  See comment below in body of Call_Chain for details on the reason.
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pragma Compiler_Unit;
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package body System.Traceback is
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   ------------------
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   -- C_Call_Chain --
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   ------------------
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   function C_Call_Chain
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     (Traceback : System.Address;
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      Max_Len   : Natural)
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      return      Natural
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   is
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      Val : Natural;
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   begin
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      Call_Chain (Traceback, Max_Len, Val);
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      return Val;
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   end C_Call_Chain;
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   ----------------
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   -- Call_Chain --
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   ----------------
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   function Backtrace
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     (Traceback   : System.Address;
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      Len         : Integer;
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      Exclude_Min : System.Address;
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      Exclude_Max : System.Address;
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      Skip_Frames : Integer)
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      return        Integer;
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   pragma Import (C, Backtrace, "__gnat_backtrace");
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   procedure Call_Chain
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     (Traceback   : System.Address;
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      Max_Len     : Natural;
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      Len         : out Natural;
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      Exclude_Min : System.Address := System.Null_Address;
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      Exclude_Max : System.Address := System.Null_Address;
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      Skip_Frames : Natural := 1)
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   is
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   begin
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      --  Note: Backtrace relies on the following call actually creating a
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      --  stack frame. To ensure that this is the case, it is essential to
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      --  compile this unit without sibling call optimization.
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      --  We want the underlying engine to skip its own frame plus the
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      --  ones we have been requested to skip ourselves.
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      Len := Backtrace (Traceback   => Traceback,
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                        Len         => Max_Len,
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                        Exclude_Min => Exclude_Min,
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                        Exclude_Max => Exclude_Max,
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                        Skip_Frames => Skip_Frames + 1);
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   end Call_Chain;
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end System.Traceback;

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