obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
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1 files changed, 148 insertions, 0 deletions

diff --git a/gcc/ada/s-tasdeb.ads b/gcc/ada/s-tasdeb.ads
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+------------------------------------------------------------------------------
+--                                                                          --
+--                  GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                --
+--                                                                          --
+--                  S Y S T E M . T A S K I N G . D E B U G                 --
+--                                                                          --
+--                                  S p e c                                 --
+--                                                                          --
+--          Copyright (C) 1997-2009, Free Software Foundation, Inc.         --
+--                                                                          --
+-- GNARL 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.     --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package encapsulates all direct interfaces to task debugging services
+--  that are needed by gdb with gnat mode.
+
+with System.Tasking;
+with System.OS_Interface;
+
+package System.Tasking.Debug is
+   pragma Preelaborate;
+
+   ------------------------------------------
+   -- Application-level debugging routines --
+   ------------------------------------------
+
+   procedure List_Tasks;
+   --  Print a list of all the known Ada tasks with abbreviated state
+   --  information, one-per-line, to the standard error file.
+
+   procedure Print_Current_Task;
+   --  Write information about current task, in hexadecimal, as one line, to
+   --  the standard error file.
+
+   procedure Print_Task_Info (T : Task_Id);
+   --  Similar to Print_Current_Task, for a given task
+
+   procedure Set_User_State (Value : Long_Integer);
+   --  Set user state value in the current task. This state will be displayed
+   --  when calling List_Tasks or Print_Current_Task. It is useful for setting
+   --  task specific state.
+
+   function Get_User_State return Long_Integer;
+   --  Return the user state for the current task
+
+   -------------------------
+   -- General GDB support --
+   -------------------------
+
+   Known_Tasks : array (0 .. 999) of Task_Id := (others => null);
+   --  Global array of tasks read by gdb, and updated by Create_Task and
+   --  Finalize_TCB
+
+   Debug_Event_Activating           : constant := 1;
+   Debug_Event_Run                  : constant := 2;
+   Debug_Event_Suspended            : constant := 3;
+   Debug_Event_Preempted            : constant := 4;
+   Debug_Event_Terminated           : constant := 5;
+   Debug_Event_Abort_Terminated     : constant := 6;
+   Debug_Event_Exception_Terminated : constant := 7;
+   Debug_Event_Rendezvous_Exception : constant := 8;
+   Debug_Event_Handled              : constant := 9;
+   Debug_Event_Dependents_Exception : constant := 10;
+   Debug_Event_Handled_Others       : constant := 11;
+
+   subtype Event_Kind_Type is Positive range 1 .. 11;
+   --  Event kinds currently defined for debugging, used globally
+   --  below and on a per taak basis.
+
+   procedure Signal_Debug_Event
+     (Event_Kind : Event_Kind_Type;
+      Task_Value : Task_Id);
+
+   ----------------------------------
+   -- VxWorks specific GDB support --
+   ----------------------------------
+
+   --  Although the following routines are implemented in a target independent
+   --  manner, only VxWorks currently uses them.
+
+   procedure Task_Creation_Hook (Thread : OS_Interface.Thread_Id);
+   --  This procedure is used to notify GDB of task's creation. It must be
+   --  called by the task's creator.
+
+   procedure Task_Termination_Hook;
+   --  This procedure is used to notify GDB of task's termination
+
+   procedure Suspend_All_Tasks (Thread_Self : OS_Interface.Thread_Id);
+   --  Suspend all the tasks except the one whose associated thread is
+   --  Thread_Self by traversing All_Tasks_Lists and calling
+   --  System.Task_Primitives.Operations.Suspend_Task.
+
+   procedure Resume_All_Tasks (Thread_Self : OS_Interface.Thread_Id);
+   --  Resume all the tasks except the one whose associated thread is
+   --  Thread_Self by traversing All_Tasks_Lists and calling
+   --  System.Task_Primitives.Operations.Continue_Task.
+
+   procedure Stop_All_Tasks_Handler;
+   --  Stop all the tasks by traversing All_Tasks_Lists and calling
+   --  System.Task_Primitives.Operations.Stop_All_Task. This function
+   --  can be used in an interrupt handler.
+
+   procedure Stop_All_Tasks;
+   --  Stop all the tasks by traversing All_Tasks_Lists and calling
+   --  System.Task_Primitives.Operations.Stop_Task.
+
+   procedure Continue_All_Tasks;
+   --  Continue all the tasks by traversing All_Tasks_Lists and calling
+   --  System.Task_Primitives.Operations.Continue_Task.
+
+   -------------------------------
+   -- Run-time tracing routines --
+   -------------------------------
+
+   procedure Trace
+     (Self_Id  : Task_Id;
+      Msg      : String;
+      Flag     : Character;
+      Other_Id : Task_Id := null);
+   --  If traces for Flag are enabled, display on Standard_Error a given
+   --  message for the current task. Other_Id is an optional second task id
+   --  to display.
+
+   procedure Set_Trace
+     (Flag  : Character;
+      Value : Boolean := True);
+   --  Enable or disable tracing for Flag. By default, flags in the range
+   --  'A' .. 'Z' are disabled, others are enabled.
+
+end System.Tasking.Debug;