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-------------------------------------------------------------------------------
--- --
--- GNAT RUN-TIME COMPONENTS --
--- --
--- G N A T . T R A C E B A C K --
--- --
--- S p e c --
--- --
--- Copyright (C) 1999-2010, 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 3, 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. --
--- --
--- As a special exception under Section 7 of GPL version 3, you are granted --
--- additional permissions described in the GCC Runtime Library Exception, --
--- version 3.1, as published by the Free Software Foundation. --
--- --
--- You should have received a copy of the GNU General Public License and --
--- a copy of the GCC Runtime Library Exception along with this program; --
--- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
--- <http://www.gnu.org/licenses/>. --
--- --
--- 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 occurrence). 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:
-
--- AiX PowerPC
--- HP-UX
--- GNU/Linux x86
--- Irix MIPS
--- LynxOS x86
--- Solaris x86
--- Solaris sparc
--- Tru64 alpha
--- OpenVMS/Alpha
--- OpenVMS/ia64
--- VxWorks PowerPC
--- VxWorks x86
--- Windows NT/XP
-
--- Note: see also GNAT.Traceback.Symbolic, a child unit in file g-trasym.ads
--- providing symbolic trace back capability for a subset of the above targets.
-
-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;