1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- S Y S T E M . T R A C E B A C K --
9 -- Copyright (C) 1999-2010, AdaCore --
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 3, 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. --
18 -- As a special exception under Section 7 of GPL version 3, you are granted --
19 -- additional permissions described in the GCC Runtime Library Exception, --
20 -- version 3.1, as published by the Free Software Foundation. --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
30 ------------------------------------------------------------------------------
32 -- This version uses System.Machine_State_Operations routines
34 with System.Machine_State_Operations;
36 package body System.Traceback is
38 use System.Machine_State_Operations;
45 (Traceback : System.Address;
48 Exclude_Min : System.Address := System.Null_Address;
49 Exclude_Max : System.Address := System.Null_Address;
50 Skip_Frames : Natural := 1)
52 type Tracebacks_Array is array (1 .. Max_Len) of Code_Loc;
53 pragma Suppress_Initialization (Tracebacks_Array);
58 Trace : Tracebacks_Array;
59 for Trace'Address use Traceback;
61 N_Skips : Natural := 0;
64 M := Allocate_Machine_State;
65 Set_Machine_State (M);
67 -- Skip the requested number of frames
70 Code := Get_Code_Loc (M);
71 exit when Code = Null_Address or else N_Skips = Skip_Frames;
74 N_Skips := N_Skips + 1;
77 -- Now, record the frames outside the exclusion bounds, updating
78 -- the Len output value along the way.
82 Code := Get_Code_Loc (M);
83 exit when Code = Null_Address or else Len = Max_Len;
85 if Code < Exclude_Min or else Code > Exclude_Max then
93 Free_Machine_State (M);
100 function C_Call_Chain
101 (Traceback : System.Address;
102 Max_Len : Natural) return Natural
106 Call_Chain (Traceback, Max_Len, Val);
110 end System.Traceback;