------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- S Y S T E M . T R A C E B A C K -- -- -- -- S p e c -- -- -- -- -- -- Copyright (C) 1999-2001 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 package provides a method for generating a traceback of the -- current execution location. The traceback shows the locations of -- calls in the call chain, up to either the top or a designated -- number of levels. pragma Polling (Off); -- We must turn polling off for this unit, because otherwise we get -- elaboration circularities with System.Exception_Tables. package System.Traceback is ---------------- -- 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); -- Store up to Max_Len code locations in Traceback, corresponding to -- the current call chain. -- -- Traceback is the address of an array of addresses where the -- result will be stored. -- -- Max_Len is the length of the Traceback array. If the call chain -- is longer than this, then additional entries are discarded, and -- the traceback is missing some of the highest level entries. -- -- Len is the returned actual number of addresses stored -- in the Traceback array. -- -- Exclude_Min/Exclude_Max, if non null, provide a range of addresses -- to ignore from the computation of the traceback. -- -- On return, the Traceback array is filled in, and Len indicates -- the number of stored entries. The first entry is the most recent -- call, and the last entry is the highest level call. function C_Call_Chain (Traceback : System.Address; Max_Len : Natural) return Natural; pragma Export (C, C_Call_Chain, "system__traceback__c_call_chain"); -- Version that can be used directly from C. end System.Traceback;