1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- S Y S T E M . T R A C E B A C K -- 6-- -- 7-- B o d y -- 8-- -- 9-- Copyright (C) 1999-2010, AdaCore -- 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 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. -- 17-- -- 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. -- 21-- -- 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/>. -- 26-- -- 27-- GNAT was originally developed by the GNAT team at New York University. -- 28-- Extensive contributions were provided by Ada Core Technologies Inc. -- 29-- -- 30------------------------------------------------------------------------------ 31 32-- This version uses System.Machine_State_Operations routines 33 34with System.Machine_State_Operations; 35 36package body System.Traceback is 37 38 use System.Machine_State_Operations; 39 40 ---------------- 41 -- Call_Chain -- 42 ---------------- 43 44 procedure Call_Chain 45 (Traceback : System.Address; 46 Max_Len : Natural; 47 Len : out Natural; 48 Exclude_Min : System.Address := System.Null_Address; 49 Exclude_Max : System.Address := System.Null_Address; 50 Skip_Frames : Natural := 1) 51 is 52 type Tracebacks_Array is array (1 .. Max_Len) of Code_Loc; 53 pragma Suppress_Initialization (Tracebacks_Array); 54 55 M : Machine_State; 56 Code : Code_Loc; 57 58 Trace : Tracebacks_Array; 59 for Trace'Address use Traceback; 60 61 N_Skips : Natural := 0; 62 63 begin 64 M := Allocate_Machine_State; 65 Set_Machine_State (M); 66 67 -- Skip the requested number of frames 68 69 loop 70 Code := Get_Code_Loc (M); 71 exit when Code = Null_Address or else N_Skips = Skip_Frames; 72 73 Pop_Frame (M); 74 N_Skips := N_Skips + 1; 75 end loop; 76 77 -- Now, record the frames outside the exclusion bounds, updating 78 -- the Len output value along the way. 79 80 Len := 0; 81 loop 82 Code := Get_Code_Loc (M); 83 exit when Code = Null_Address or else Len = Max_Len; 84 85 if Code < Exclude_Min or else Code > Exclude_Max then 86 Len := Len + 1; 87 Trace (Len) := Code; 88 end if; 89 90 Pop_Frame (M); 91 end loop; 92 93 Free_Machine_State (M); 94 end Call_Chain; 95 96 ------------------ 97 -- C_Call_Chain -- 98 ------------------ 99 100 function C_Call_Chain 101 (Traceback : System.Address; 102 Max_Len : Natural) return Natural 103 is 104 Val : Natural; 105 begin 106 Call_Chain (Traceback, Max_Len, Val); 107 return Val; 108 end C_Call_Chain; 109 110end System.Traceback; 111