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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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4 -- --
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5 -- S Y S T E M . S T A C K _ C H E C K I N G . O P E R A T I O N S --
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6 -- --
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7 -- S p e c --
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8 -- --
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9 -- Copyright (C) 1999-2017, Free Software Foundation, Inc. --
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10 -- --
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11 -- GNARL is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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17 -- --
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18 -- As a special exception under Section 7 of GPL version 3, you are granted --
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19 -- additional permissions described in the GCC Runtime Library Exception, --
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20 -- version 3.1, as published by the Free Software Foundation. --
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21 -- --
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22 -- You should have received a copy of the GNU General Public License and --
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23 -- a copy of the GCC Runtime Library Exception along with this program; --
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24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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25 -- <http://www.gnu.org/licenses/>. --
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26 -- --
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27 -- GNARL was developed by the GNARL team at Florida State University. --
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28 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
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29 -- --
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30 ------------------------------------------------------------------------------
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31
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32 -- This version of this package is for implementations which use
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33 -- the stack limit approach (the limit of the stack is stored into a per
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34 -- thread variable).
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35
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36 pragma Restrictions (No_Elaboration_Code);
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37 -- We want to guarantee the absence of elaboration code because the binder
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38 -- does not handle references to this package.
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39
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40 pragma Polling (Off);
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41 -- Turn off polling, we do not want polling to take place during stack
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42 -- checking operations. It causes infinite loops and other problems.
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43
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44 package System.Stack_Checking.Operations is
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45 pragma Preelaborate;
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46
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47 procedure Initialize_Stack_Limit;
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48 pragma Export (C, Initialize_Stack_Limit,
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49 "__gnat_initialize_stack_limit");
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50 -- This procedure is called before elaboration to setup the stack limit
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51 -- for the environment task and to register the hook to be called at
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52 -- task creation.
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53 end System.Stack_Checking.Operations;
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