1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- S Y S T E M . T R A C E B A C K --
10 -- Copyright (C) 1999-2000 Ada Core Technologies, Inc. --
12 -- GNAT is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 2, or (at your option) any later ver- --
15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNAT; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, USA. --
23 -- As a special exception, if other files instantiate generics from this --
24 -- unit, or you link this unit with other files to produce an executable, --
25 -- this unit does not by itself cause the resulting executable to be --
26 -- covered by the GNU General Public License. This exception does not --
27 -- however invalidate any other reasons why the executable file might be --
28 -- covered by the GNU Public License. --
30 -- GNAT was originally developed by the GNAT team at New York University. --
31 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
33 ------------------------------------------------------------------------------
35 -- This version assumes that System.Machine_State_Operations.Pop_Frame can
36 -- work with the Info parameter being null.
38 with System.Machine_State_Operations;
40 package body System.Traceback is
42 use System.Machine_State_Operations;
49 (Traceback : System.Address;
53 Exclude_Max : System.Address := System.Null_Address)
55 type Tracebacks_Array is array (1 .. Max_Len) of Code_Loc;
56 pragma Suppress_Initialization (Tracebacks_Array);
61 Trace : Tracebacks_Array;
62 for Trace'Address use Traceback;
65 M := Allocate_Machine_State;
66 Set_Machine_State (M);
69 Code := Get_Code_Loc (M);
71 exit when Code = Null_Address or else J = Max_Len + 1;
73 if Code < Exclude_Min or else Code > Exclude_Max then
78 Pop_Frame (M, System.Null_Address);
82 Free_Machine_State (M);
90 (Traceback : System.Address;
91 Max_Len : Natural) return Natural
95 Call_Chain (Traceback, Max_Len, Val);