New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45955 138bc75d-0d04-0410-961f-82ee72b054a4

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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                       G N A T . D E B U G _ P O O L S                    --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                            $Revision: 1.6 $
+--                                                                          --
+--          Copyright (C) 1992-2001 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 2,  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.  See the GNU General Public License --
+-- for  more details.  You should have  received  a copy of the GNU General --
+-- Public License  distributed with GNAT;  see file COPYING.  If not, write --
+-- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
+-- MA 02111-1307, USA.                                                      --
+--                                                                          --
+-- As a special exception,  if other files  instantiate  generics from this --
+-- unit, or you link  this unit with other files  to produce an executable, --
+-- this  unit  does not  by itself cause  the resulting  executable  to  be --
+-- covered  by the  GNU  General  Public  License.  This exception does not --
+-- however invalidate  any other reasons why  the executable file  might be --
+-- covered by the  GNU Public License.                                      --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with System;                  use System;
+with System.Storage_Elements; use System.Storage_Elements;
+with System.Checked_Pools;
+
+package GNAT.Debug_Pools is
+
+   --  The debug pool is used to track down memory corruption due to use of
+   --  deallocated memory or incorrect unchecked conversions. Allocation
+   --  strategy :
+
+   --     - allocation:   . memory is normally allocated with malloc
+   --                     . the allocated address is noted in a table
+
+   --     - deallocation: . memory is  filled with "DEAD_BEEF" patterns
+   --                     . memory is not freed
+   --                     . exceptions are raised if the memory was not
+   --                       allocated or was already deallocated
+
+   --     - dereference:  . exceptions are raised if the memory was not
+   --                        allocated or was already deallocated
+
+   Accessing_Not_Allocated_Storage : exception;
+   Accessing_Deallocated_Storage   : exception;
+   Freeing_Not_Allocated_Storage   : exception;
+   Freeing_Deallocated_Storage     : exception;
+
+   type Debug_Pool is
+     new System.Checked_Pools.Checked_Pool with private;
+
+   procedure Allocate
+     (Pool                     : in out Debug_Pool;
+      Storage_Address          : out Address;
+      Size_In_Storage_Elements : Storage_Count;
+      Alignment                : Storage_Count);
+
+   procedure Deallocate
+     (Pool                     : in out Debug_Pool;
+      Storage_Address          : Address;
+      Size_In_Storage_Elements : Storage_Count;
+      Alignment                : Storage_Count);
+
+   function Storage_Size
+     (Pool : Debug_Pool)
+      return System.Storage_Elements.Storage_Count;
+
+   procedure Dereference
+     (Pool                     : in out Debug_Pool;
+      Storage_Address          : System.Address;
+      Size_In_Storage_Elements : Storage_Count;
+      Alignment                : Storage_Count);
+
+   generic
+      with procedure Put_Line (S : String);
+   procedure Print_Info (Pool : Debug_Pool);
+   --  Print out information about the High Water Mark, the current and
+   --  total number of bytes allocated and the total number of bytes
+   --  deallocated.
+
+private
+   type Debug_Pool is new System.Checked_Pools.Checked_Pool with record
+      Allocated   : Storage_Count := 0;
+      --  Total number of bytes allocated in this pool
+
+      Deallocated : Storage_Count := 0;
+      --  Total number of bytes deallocated in this pool
+
+      High_Water  : Storage_Count := 0;
+      --  Maximum of during the time of Allocated - Deallocated
+   end record;
+end GNAT.Debug_Pools;