arch: Use shared_ptr for all Faults

This patch takes quite a large step in transitioning from the ad-hoc
RefCountingPtr to the c++11 shared_ptr by adopting its use for all
Faults. There are no changes in behaviour, and the code modifications
are mostly just replacing "new" with "make_shared".

src/sim/fault_fwd.hh

@@ -1,41 +0,0 @@
-/*
- * Copyright (c) 2010 Advanced Micro Devices, Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met: redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer;
- * redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution;
- * neither the name of the copyright holders nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Authors: Gabe Black
- */
-
-#ifndef __SIM_FAULT_FWD_HH__
-#define __SIM_FAULT_FWD_HH__
-
-#include "base/refcnt.hh"
-
-class FaultBase;
-typedef RefCountingPtr<FaultBase> Fault;
-
-FaultBase * const NoFault = 0;
-
-#endif // __SIM_FAULT_FWD_HH__

src/sim/faults.hh

@@ -32,10 +32,8 @@
 #ifndef __FAULTS_HH__
 #define __FAULTS_HH__
 
-#include "base/refcnt.hh"
 #include "base/types.hh"
 #include "cpu/static_inst.hh"
-#include "sim/fault_fwd.hh"
 #include "sim/stats.hh"
 
 class ThreadContext;
@@ -50,7 +48,7 @@ typedef Stats::Scalar FaultStat;
 // all faults returned using the Fault type) will use the
 // generic FaultBase name.
 
-class FaultBase : public RefCounted
+class FaultBase
 {
   public:
     virtual FaultName name() const = 0;

src/sim/tlb.hh

@@ -45,7 +45,6 @@
 
 #include "base/misc.hh"
 #include "mem/request.hh"
-#include "sim/fault_fwd.hh"
 #include "sim/sim_object.hh"
 
 class ThreadContext;