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Diffstat (limited to 'gcc-4.8.3/gcc/ada/g-traceb.ads')
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1 files changed, 99 insertions, 0 deletions
diff --git a/gcc-4.8.3/gcc/ada/g-traceb.ads b/gcc-4.8.3/gcc/ada/g-traceb.ads new file mode 100644 index 000000000..debb0c403 --- /dev/null +++ b/gcc-4.8.3/gcc/ada/g-traceb.ads @@ -0,0 +1,99 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- G N A T . T R A C E B A C K -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 1999-2012, 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 +-- LynxOS x86 +-- Solaris x86 +-- Solaris sparc +-- 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; |