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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
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1 files changed, 119 insertions, 0 deletions

diff --git a/gcc/ada/g-exctra.adb b/gcc/ada/g-exctra.adb
new file mode 100644
index 000000000..8534bbbb4
--- /dev/null
+++ b/gcc/ada/g-exctra.adb
@@ -0,0 +1,119 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                  G N A T . E X C E P T I O N _ T R A C E S               --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--                     Copyright (C) 2000-2009, 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 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,  51  Franklin  Street,  Fifth  Floor, --
+-- Boston, MA 02110-1301, 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. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with System.Standard_Library; use System.Standard_Library;
+with System.Soft_Links;       use System.Soft_Links;
+
+package body GNAT.Exception_Traces is
+
+   --  Calling the decorator directly from where it is needed would require
+   --  introducing nasty dependencies upon the spec of this package (typically
+   --  in a-except.adb). We also have to deal with the fact that the traceback
+   --  array within an exception occurrence and the one the decorator shall
+   --  accept are of different types. These are two reasons for which a wrapper
+   --  with a System.Address argument is indeed used to call the decorator
+   --  provided by the user of this package. This wrapper is called via a
+   --  soft-link, which either is null when no decorator is in place or "points
+   --  to" the following function otherwise.
+
+   function Decorator_Wrapper
+     (Traceback : System.Address;
+      Len       : Natural) return String;
+   --  The wrapper to be called when a decorator is in place for exception
+   --  backtraces.
+   --
+   --  Traceback is the address of the call chain array as stored in the
+   --  exception occurrence and Len is the number of significant addresses
+   --  contained in this array.
+
+   Current_Decorator : Traceback_Decorator := null;
+   --  The decorator to be called by the wrapper when it is not null, as set
+   --  by Set_Trace_Decorator. When this access is null, the wrapper is null
+   --  also and shall then not be called.
+
+   -----------------------
+   -- Decorator_Wrapper --
+   -----------------------
+
+   function Decorator_Wrapper
+     (Traceback : System.Address;
+      Len       : Natural) return String
+   is
+      Decorator_Traceback : Tracebacks_Array (1 .. Len);
+      for Decorator_Traceback'Address use Traceback;
+
+      --  Handle the "transition" from the array stored in the exception
+      --  occurrence to the array expected by the decorator.
+
+      pragma Import (Ada, Decorator_Traceback);
+
+   begin
+      return Current_Decorator.all (Decorator_Traceback);
+   end Decorator_Wrapper;
+
+   -------------------------
+   -- Set_Trace_Decorator --
+   -------------------------
+
+   procedure Set_Trace_Decorator (Decorator : Traceback_Decorator) is
+   begin
+      Current_Decorator := Decorator;
+      Traceback_Decorator_Wrapper :=
+        (if Current_Decorator /= null
+         then Decorator_Wrapper'Access else null);
+   end Set_Trace_Decorator;
+
+   ---------------
+   -- Trace_Off --
+   ---------------
+
+   procedure Trace_Off is
+   begin
+      Exception_Trace := RM_Convention;
+   end Trace_Off;
+
+   --------------
+   -- Trace_On --
+   --------------
+
+   procedure Trace_On (Kind : Trace_Kind) is
+   begin
+      case Kind is
+         when Every_Raise =>
+            Exception_Trace := Every_Raise;
+         when Unhandled_Raise =>
+            Exception_Trace := Unhandled_Raise;
+      end case;
+   end Trace_On;
+
+end GNAT.Exception_Traces;