------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- G N A T . T R A C E B A C K -- -- -- -- S p e c -- -- -- -- Copyright (C) 1999-2004 Ada Core Technologies, 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. -- -- -- ------------------------------------------------------------------------------ -- Run-time non-symbolic traceback support -- 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. -- The traceback information is in the form of absolute code locations. -- These code locations may be converted to corresponding source locations -- using the external addr2line utility, or from within GDB. -- In order to use this facility, in some cases the binder must be invoked -- with -E switch (store the backtrace with exception occurence). Please -- refer to gnatbind documentation for more information. -- To analyze the code locations later using addr2line or gdb, the necessary -- units must be compiled with the debugging switch -g in the usual manner. -- Note that it is not necessary to compile with -g to use Call_Chain. In -- other words, the following sequence of steps can be used: -- Compile without -g -- Run the program, and call Call_Chain -- Recompile with -g -- Use addr2line to interpret the absolute call locations (note that -- addr2line expects addresses in hexadecimal format). -- This capability is currently supported on the following targets: -- All x86 ports -- AiX PowerPC -- HP-UX -- Irix -- Solaris sparc -- Tru64 -- VxWorks PowerPC -- VxWorks Alpha with System; with Ada.Exceptions.Traceback; package GNAT.Traceback is pragma Elaborate_Body; subtype Code_Loc is System.Address; -- Code location used in building tracebacks subtype Tracebacks_Array is Ada.Exceptions.Traceback.Tracebacks_Array; -- Traceback array used to hold a generated traceback list. ---------------- -- Call_Chain -- ---------------- procedure Call_Chain (Traceback : out Tracebacks_Array; Len : out Natural); -- Store up to Traceback'Length tracebacks corresponding to the current -- call chain. The first entry stored corresponds to the deepest level -- of subprogram calls. Len shows the number of traceback entries stored. -- It will be equal to Traceback'Length unless the entire traceback is -- shorter, in which case positions in Traceback past the Len position -- are undefined on return. end GNAT.Traceback;