------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- S Y S T E M . T R A C E B A C K -- -- -- -- B o d y -- -- -- -- Copyright (C) 1999-2005, AdaCore -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 2, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- -- for more details. You should have received a copy of the GNU General -- -- Public License distributed with GNAT; see file COPYING. If not, write -- -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- -- Boston, MA 02110-1301, USA. -- -- -- -- As a special exception, if other files instantiate generics from this -- -- unit, or you link this unit with other files to produce an executable, -- -- this unit does not by itself cause the resulting executable to be -- -- covered by the GNU General Public License. This exception does not -- -- however invalidate any other reasons why the executable file might be -- -- covered by the GNU Public License. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- This version uses System.Machine_State_Operations routines with System.Machine_State_Operations; package body System.Traceback is use System.Machine_State_Operations; ---------------- -- Call_Chain -- ---------------- procedure Call_Chain (Traceback : System.Address; Max_Len : Natural; Len : out Natural; Exclude_Min : System.Address := System.Null_Address; Exclude_Max : System.Address := System.Null_Address; Skip_Frames : Natural := 1) is type Tracebacks_Array is array (1 .. Max_Len) of Code_Loc; pragma Suppress_Initialization (Tracebacks_Array); M : Machine_State; Code : Code_Loc; Trace : Tracebacks_Array; for Trace'Address use Traceback; N_Skips : Natural := 0; begin M := Allocate_Machine_State; Set_Machine_State (M); -- Skip the requested number of frames loop Code := Get_Code_Loc (M); exit when Code = Null_Address or else N_Skips = Skip_Frames; Pop_Frame (M); N_Skips := N_Skips + 1; end loop; -- Now, record the frames outside the exclusion bounds, updating -- the Len output value along the way. Len := 0; loop Code := Get_Code_Loc (M); exit when Code = Null_Address or else Len = Max_Len; if Code < Exclude_Min or else Code > Exclude_Max then Len := Len + 1; Trace (Len) := Code; end if; Pop_Frame (M); end loop; Free_Machine_State (M); end Call_Chain; ------------------ -- C_Call_Chain -- ------------------ function C_Call_Chain (Traceback : System.Address; Max_Len : Natural) return Natural is Val : Natural; begin Call_Chain (Traceback, Max_Len, Val); return Val; end C_Call_Chain; end System.Traceback;