68 lines
3.8 KiB
Ada
68 lines
3.8 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- S Y S T E M . T R A C E B A C K _ E N T R I E S --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 2003-2014, Free Software Foundation, Inc. --
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-- --
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-- This specification is derived from the Ada Reference Manual for use with --
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-- GNAT. The copyright notice above, and the license provisions that follow --
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-- apply solely to the contents of the part following the private keyword. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This package offers an abstraction of what is stored in traceback arrays
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-- for call-chain computation purposes. By default, as defined in this
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-- version of the package, an entry is a mere code location representing the
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-- address of a call instruction part of the call-chain.
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pragma Polling (Off);
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-- We must turn polling off for this unit, because otherwise we get
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-- elaboration circularities with Ada.Exceptions.
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pragma Compiler_Unit_Warning;
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package System.Traceback_Entries is
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pragma Preelaborate;
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subtype Traceback_Entry is System.Address;
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-- This subtype defines what each traceback array entry contains
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Null_TB_Entry : constant Traceback_Entry := System.Null_Address;
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-- This is the value to be used when initializing an entry
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type Tracebacks_Array is array (Positive range <>) of Traceback_Entry;
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function PC_For (TB_Entry : Traceback_Entry) return System.Address;
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pragma Inline (PC_For);
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-- Returns the address of the call instruction associated with the
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-- provided entry.
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function TB_Entry_For (PC : System.Address) return Traceback_Entry;
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pragma Inline (TB_Entry_For);
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-- Returns an entry representing a frame for a call instruction at PC
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end System.Traceback_Entries;
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