------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- S Y S T E M . T R A C E B A C K -- -- -- -- B o d y -- -- -- -- Copyright (C) 1999-2003 Free Software Foundation, Inc. -- -- -- -- 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, 59 Temple Place - Suite 330, Boston, -- -- MA 02111-1307, 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 is the default version of this package -- Note: this unit must be compiled using -fno-optimize-sibling-calls. -- See comment below in body of Call_Chain for details on the reason. package body System.Traceback is ------------------ -- 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; ---------------- -- Call_Chain -- ---------------- function Backtrace (Traceback : System.Address; Len : Integer; Exclude_Min : System.Address; Exclude_Max : System.Address; Skip_Frames : Integer) return Integer; pragma Import (C, Backtrace, "__gnat_backtrace"); 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 begin -- Note: Backtrace relies on the following call actually creating a -- stack frame. To ensure that this is the case, it is essential to -- compile this unit without sibling call optimization. -- We want the underlying engine to skip its own frame plus the -- ones we have been requested to skip ourselves. Len := Backtrace (Traceback => Traceback, Len => Max_Len, Exclude_Min => Exclude_Min, Exclude_Max => Exclude_Max, Skip_Frames => Skip_Frames + 1); end Call_Chain; end System.Traceback;