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+++ b/gcc/ada/libgnat/g-excact.ads	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,118 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--              G N A T . E X C E P T I O N _ A C T I O N S                 --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 2002-2017, Free Software Foundation, Inc.         --
+--                                                                          --
+-- 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 provides support for callbacks on exceptions
+
+--  These callbacks are called immediately when either a specific exception,
+--  or any exception, is raised, before any other actions taken by raise, in
+--  particular before any unwinding of the stack occurs.
+
+--  Callbacks for specific exceptions are registered through calls to
+--  Register_Id_Action. Here is an example of code that uses this package to
+--  automatically core dump when the exception Constraint_Error is raised.
+
+--      Register_Id_Action (Constraint_Error'Identity, Core_Dump'Access);
+
+--  Subprograms are also provided to list the currently registered exceptions,
+--  or to convert from a string to an exception id.
+
+--  This package can easily be extended, for instance to provide a callback
+--  whenever an exception matching a regular expression is raised. The idea
+--  is to register a global action, called whenever any exception is raised.
+--  Dispatching can then be done directly in this global action callback.
+
+with Ada.Exceptions; use Ada.Exceptions;
+
+package GNAT.Exception_Actions is
+
+   type Exception_Action is access
+     procedure (Occurrence : Exception_Occurrence);
+   --  General callback type whenever an exception is raised. The callback
+   --  procedure must not propagate an exception (execution of the program
+   --  is erroneous if such an exception is propagated).
+
+   procedure Register_Global_Action (Action : Exception_Action);
+   --  Action will be called whenever an exception is raised. Only one such
+   --  action can be registered at any given time, and registering a new action
+   --  will override any previous action that might have been registered.
+   --
+   --  Action is called before the exception is propagated to user's code.
+   --  If Action is null, this will in effect cancel all exception actions.
+
+   procedure Register_Id_Action
+     (Id     : Exception_Id;
+      Action : Exception_Action);
+   --  Action will be called whenever an exception of type Id is raised. Only
+   --  one such action can be registered for each exception id, and registering
+   --  a new action will override any previous action registered for this
+   --  Exception_Id. Program_Error is raised if Id is Null_Id.
+
+   function Name_To_Id (Name : String) return Exception_Id;
+   --  Convert an exception name to an exception id. Null_Id is returned
+   --  if no such exception exists. Name must be an all upper-case string,
+   --  or the exception will not be found. The exception name must be fully
+   --  qualified (but not including Standard). It is not possible to convert
+   --  an exception that is declared within an unlabeled block.
+   --
+   --  Note: All non-predefined exceptions will return Null_Id for programs
+   --  compiled with pragma Restriction (No_Exception_Registration)
+
+   function Registered_Exceptions_Count return Natural;
+   --  Return the number of exceptions that have been registered so far.
+   --  Exceptions declared locally will not appear in this list until their
+   --  block has been executed at least once.
+   --
+   --  Note: The count includes only predefined exceptions for programs
+   --  compiled with pragma Restrictions (No_Exception_Registration).
+
+   type Exception_Id_Array is array (Natural range <>) of Exception_Id;
+
+   procedure Get_Registered_Exceptions
+     (List : out Exception_Id_Array;
+      Last : out Integer);
+   --  Return the list of registered exceptions.
+   --  Last is the index in List of the last exception returned.
+   --
+   --  An exception is registered the first time the block containing its
+   --  declaration is elaborated. Exceptions defined at library-level are
+   --  therefore immediately visible, whereas exceptions declared in local
+   --  blocks will not be visible until the block is executed at least once.
+   --
+   --  Note: The list contains only the predefined exceptions if the program
+   --  is compiled with pragma Restrictions (No_Exception_Registration);
+
+   procedure Core_Dump (Occurrence : Exception_Occurrence);
+   --  Dump memory (called a core dump in some systems) if supported by the
+   --  OS (most unix systems), and abort execution of the application. Under
+   --  Windows this procedure will not dump the memory, it will only abort
+   --  execution.
+
+end GNAT.Exception_Actions;