1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME COMPONENTS -- 4-- -- 5-- S Y S T E M . T R A C E B A C K _ E N T R I E S -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 2003-2014, Free Software Foundation, Inc. -- 10-- -- 11-- This specification is derived from the Ada Reference Manual for use with -- 12-- GNAT. The copyright notice above, and the license provisions that follow -- 13-- apply solely to the contents of the part following the private keyword. -- 14-- -- 15-- GNAT is free software; you can redistribute it and/or modify it under -- 16-- terms of the GNU General Public License as published by the Free Soft- -- 17-- ware Foundation; either version 3, or (at your option) any later ver- -- 18-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 19-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 20-- or FITNESS FOR A PARTICULAR PURPOSE. -- 21-- -- 22-- As a special exception under Section 7 of GPL version 3, you are granted -- 23-- additional permissions described in the GCC Runtime Library Exception, -- 24-- version 3.1, as published by the Free Software Foundation. -- 25-- -- 26-- You should have received a copy of the GNU General Public License and -- 27-- a copy of the GCC Runtime Library Exception along with this program; -- 28-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 29-- <http://www.gnu.org/licenses/>. -- 30-- -- 31-- GNAT was originally developed by the GNAT team at New York University. -- 32-- Extensive contributions were provided by Ada Core Technologies Inc. -- 33-- -- 34------------------------------------------------------------------------------ 35 36-- This package offers an abstraction of what is stored in traceback arrays 37-- for call-chain computation purposes. By default, as defined in this 38-- version of the package, an entry is a mere code location representing the 39-- address of a call instruction part of the call-chain. 40 41pragma Polling (Off); 42-- We must turn polling off for this unit, because otherwise we get 43-- elaboration circularities with Ada.Exceptions. 44 45pragma Compiler_Unit_Warning; 46 47package System.Traceback_Entries is 48 pragma Preelaborate; 49 50 subtype Traceback_Entry is System.Address; 51 -- This subtype defines what each traceback array entry contains 52 53 Null_TB_Entry : constant Traceback_Entry := System.Null_Address; 54 -- This is the value to be used when initializing an entry 55 56 type Tracebacks_Array is array (Positive range <>) of Traceback_Entry; 57 58 function PC_For (TB_Entry : Traceback_Entry) return System.Address; 59 pragma Inline (PC_For); 60 -- Returns the address of the call instruction associated with the 61 -- provided entry. 62 63 function TB_Entry_For (PC : System.Address) return Traceback_Entry; 64 pragma Inline (TB_Entry_For); 65 -- Returns an entry representing a frame for a call instruction at PC 66 67end System.Traceback_Entries; 68