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
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 74 insertions, 0 deletions

diff --git a/gcc/ada/a-excach.adb b/gcc/ada/a-excach.adb
new file mode 100644
index 000000000..6a33601fb
--- /dev/null
+++ b/gcc/ada/a-excach.adb
@@ -0,0 +1,74 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--             A D A . E X C E P T I O N S . C A L L _ C H A I N            --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--          Copyright (C) 1992-2009, 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+pragma Warnings (Off);
+--  Allow withing of non-Preelaborated units in Ada 2005 mode where this
+--  package will be categorized as Preelaborate. See AI-362 for details.
+--  It is safe in the context of the run-time to violate the rules!
+
+with System.Traceback;
+
+pragma Warnings (On);
+
+separate (Ada.Exceptions)
+procedure Call_Chain (Excep : EOA) is
+
+   Exception_Tracebacks : Integer;
+   pragma Import (C, Exception_Tracebacks, "__gl_exception_tracebacks");
+   --  Boolean indicating whether tracebacks should be stored in exception
+   --  occurrences.
+
+begin
+   if Exception_Tracebacks /= 0 and Excep.Num_Tracebacks = 0 then
+
+      --  If Exception_Tracebacks = 0 then the program was not
+      --  compiled for storing tracebacks in exception occurrences
+      --  (-bargs -E switch) so that we do not generate them.
+      --
+      --  If Excep.Num_Tracebacks /= 0 then this is a reraise, no need
+      --  to store a new (wrong) chain.
+
+      --  We ask System.Traceback.Call_Chain to skip 3 frames to ensure that
+      --  itself, ourselves and our caller are not part of the result. Our
+      --  caller is always an exception propagation actor that we don't want
+      --  to see, and it may be part of a separate subunit which pulls it
+      --  outside the AAA/ZZZ range.
+
+      System.Traceback.Call_Chain
+        (Traceback   => Excep.Tracebacks'Address,
+         Max_Len     => Max_Tracebacks,
+         Len         => Excep.Num_Tracebacks,
+         Exclude_Min => Code_Address_For_AAA,
+         Exclude_Max => Code_Address_For_ZZZ,
+         Skip_Frames => 3);
+   end if;
+
+end Call_Chain;