Check in a pristine copy of GCC 4.8.1.

The copy of GCC that we use for Android is still not working for
mingw. Rather than finding all the differences that have crept into
our GCC, just check in a copy from
ftp://ftp.gnu.org/gnu/gcc/gcc-4.9.3/gcc-4.8.1.tar.bz2.

GCC 4.8.1 was chosen because it is what we have been using for mingw
thus far, and the emulator doesn't yet work when upgrading to 4.9.

Bug: http://b/26523949
Change-Id: Iedc0f05243d4332cc27ccd46b8a4b203c88dcaa3

1 files changed, 215 insertions, 0 deletions

diff --git a/gcc-4.8.1/gcc/ada/s-tataat.adb b/gcc-4.8.1/gcc/ada/s-tataat.adb
new file mode 100644
index 000000000..0b4210d28
--- /dev/null
+++ b/gcc-4.8.1/gcc/ada/s-tataat.adb
@@ -0,0 +1,215 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
+--                                                                          --
+--         S Y S T E M . T A S K I N G . T A S K _ A T T R I B U T E S      --
+--                                                                          --
+--                                  B o d y                                 --
+--                                                                          --
+--             Copyright (C) 1991-1994, Florida State University            --
+--                     Copyright (C) 1995-2010, AdaCore                     --
+--                                                                          --
+-- 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/>.                                          --
+--                                                                          --
+-- GNARL was developed by the GNARL team at Florida State University.       --
+-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with Ada.Unchecked_Conversion;
+
+with System.Task_Primitives.Operations;
+with System.Tasking.Initialization;
+
+package body System.Tasking.Task_Attributes is
+
+   use Task_Primitives.Operations;
+   use Tasking.Initialization;
+
+   function To_Access_Address is new Ada.Unchecked_Conversion
+     (Access_Node, Access_Address);
+   --  Store pointer to indirect attribute list
+
+   --------------
+   -- Finalize --
+   --------------
+
+   procedure Finalize (X : in out Instance) is
+      Q, To_Be_Freed : Access_Node;
+      Self_Id        : constant Task_Id := Self;
+
+   begin
+      --  Defer abort. Note that we use the nestable versions of Defer_Abort
+      --  and Undefer_Abort, because abort can already deferred when this is
+      --  called during finalization, which would cause an assert failure
+      --  in Defer_Abort.
+
+      Defer_Abort_Nestable (Self_Id);
+      Lock_RTS;
+
+      --  Remove this instantiation from the list of all instantiations
+
+      declare
+         P : Access_Instance;
+         Q : Access_Instance := All_Attributes;
+
+      begin
+         while Q /= null and then Q /= X'Unchecked_Access loop
+            P := Q; Q := Q.Next;
+         end loop;
+
+         pragma Assert (Q /= null);
+
+         if P = null then
+            All_Attributes := Q.Next;
+         else
+            P.Next := Q.Next;
+         end if;
+      end;
+
+      if X.Index /= 0 then
+
+         --  Free location of this attribute, for reuse
+
+         In_Use := In_Use and not (2**Natural (X.Index));
+
+         --  There is no need for finalization in this case, since controlled
+         --  types are too big to fit in the TCB.
+
+      else
+         --  Remove nodes for this attribute from the lists of all tasks,
+         --  and deallocate the nodes. Deallocation does finalization, if
+         --  necessary.
+
+         declare
+            C : System.Tasking.Task_Id := All_Tasks_List;
+            P : Access_Node;
+
+         begin
+            while C /= null loop
+               Write_Lock (C);
+
+               Q := To_Access_Node (C.Indirect_Attributes);
+               while Q /= null
+                 and then Q.Instance /= X'Unchecked_Access
+               loop
+                  P := Q;
+                  Q := Q.Next;
+               end loop;
+
+               if Q /= null then
+                  if P = null then
+                     C.Indirect_Attributes := To_Access_Address (Q.Next);
+                  else
+                     P.Next := Q.Next;
+                  end if;
+
+                  --  Can't Deallocate now since we are holding RTS_Lock
+
+                  Q.Next := To_Be_Freed;
+                  To_Be_Freed := Q;
+               end if;
+
+               Unlock (C);
+               C := C.Common.All_Tasks_Link;
+            end loop;
+         end;
+      end if;
+
+      Unlock_RTS;
+
+      while To_Be_Freed /= null loop
+         Q := To_Be_Freed;
+         To_Be_Freed := To_Be_Freed.Next;
+         X.Deallocate.all (Q);
+      end loop;
+
+      Undefer_Abort_Nestable (Self_Id);
+
+   exception
+      when others =>
+         null;
+         pragma Assert (False,
+           "Exception in task attribute instance finalization");
+   end Finalize;
+
+   -------------------------
+   -- Finalize Attributes --
+   -------------------------
+
+   --  This is to be called just before the ATCB is deallocated.
+   --  It relies on the caller holding T.L write-lock on entry.
+
+   procedure Finalize_Attributes (T : Task_Id) is
+      P : Access_Node;
+      Q : Access_Node := To_Access_Node (T.Indirect_Attributes);
+
+   begin
+      --  Deallocate all the indirect attributes of this task
+
+      while Q /= null loop
+         P := Q;
+         Q := Q.Next; P.Instance.Deallocate.all (P);
+      end loop;
+
+      T.Indirect_Attributes := null;
+
+   exception
+      when others =>
+         null;
+         pragma Assert (False,
+           "Exception in per-task attributes finalization");
+   end Finalize_Attributes;
+
+   ---------------------------
+   -- Initialize Attributes --
+   ---------------------------
+
+   --  This is to be called by System.Tasking.Stages.Create_Task
+
+   procedure Initialize_Attributes (T : Task_Id) is
+      P       : Access_Instance;
+      Self_Id : constant Task_Id := Self;
+
+   begin
+      Defer_Abort (Self_Id);
+      Lock_RTS;
+
+      --  Initialize all the direct-access attributes of this task
+
+      P := All_Attributes;
+
+      while P /= null loop
+         if P.Index /= 0 then
+            T.Direct_Attributes (P.Index) :=
+              Direct_Attribute_Element
+                (System.Storage_Elements.To_Address (P.Initial_Value));
+         end if;
+
+         P := P.Next;
+      end loop;
+
+      Unlock_RTS;
+      Undefer_Abort (Self_Id);
+
+   exception
+      when others =>
+         null;
+         pragma Assert (False);
+   end Initialize_Attributes;
+
+end System.Tasking.Task_Attributes;