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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . T R A C E B A C K _ E N T R I E S --
-- --
-- S p e c --
-- --
-- Copyright (C) 2003-2021, Free Software Foundation, Inc. --
-- --
-- This specification is derived from the Ada Reference Manual for use with --
-- GNAT. The copyright notice above, and the license provisions that follow --
-- apply solely to the contents of the part following the private keyword. --
-- --
-- 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. --
-- --
------------------------------------------------------------------------------
-- This package offers an abstraction of what is stored in traceback arrays
-- for call-chain computation purposes. By default, as defined in this
-- version of the package, an entry is a mere code location representing the
-- address of a call instruction part of the call-chain.
package System.Traceback_Entries is
pragma Preelaborate;
subtype Traceback_Entry is System.Address;
-- This subtype defines what each traceback array entry contains
Null_TB_Entry : constant Traceback_Entry := System.Null_Address;
-- This is the value to be used when initializing an entry
type Tracebacks_Array is array (Positive range <>) of Traceback_Entry;
function PC_For (TB_Entry : Traceback_Entry) return System.Address;
pragma Inline (PC_For);
-- Returns the address of the call instruction associated with the
-- provided entry.
function TB_Entry_For (PC : System.Address) return Traceback_Entry;
pragma Inline (TB_Entry_For);
-- Returns an entry representing a frame for a call instruction at PC
end System.Traceback_Entries;
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