Added Sanitizer.h to suppress undefined behaviours

src/core/Sanitizer.h

+//======================================================================================================================
+//
+//  This file is part of waLBerla. waLBerla is free software: you can
+//  redistribute it and/or modify it under the terms of the GNU General Public
+//  License as published by the Free Software Foundation, either version 3 of
+//  the License, or (at your option) any later version.
+//
+//  waLBerla is distributed in the hope that it will be useful, but WITHOUT
+//  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 along
+//  with waLBerla (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
+//
+//! \file Sanitizer.h
+//! \ingroup core
+//! \author Dominik Thoennes <dominik.thoennes@fau.de>
+//
+//======================================================================================================================
+
+#pragma once
+
+#if (( defined WALBERLA_CXX_COMPILER_IS_CLANG ) && ( __clang_major__ >=4 )  )  \
+ || (( defined WALBERLA_CXX_COMPILER_IS_GNU )   && ( __GNUC__ >= 5 ) )
+# define ATTRIBUTE_NO_SANITIZE_ADDRESS __attribute__((no_sanitize_address))
+#else
+# define ATTRIBUTE_NO_SANITIZE_ADDRESS
+#endif
+
+#if ( ( defined WALBERLA_CXX_COMPILER_IS_GNU ) && ( __GNUC__ >= 5 ) )
+# define ATTRIBUTE_NO_SANITIZE_UNDEFINED __attribute__((no_sanitize_undefined))
+#elif (( defined WALBERLA_CXX_COMPILER_IS_CLANG ) && ( __clang_major__ >= 4 ) )
+# define ATTRIBUTE_NO_SANITIZE_UNDEFINED __attribute__((no_sanitize("undefined")))
+#else
+# define ATTRIBUTE_NO_SANITIZE_UNDEFINED
+#endif
\ No newline at end of file

src/core/mpi/RecvBuffer.h

 //======================================================================================================================
 //
-//  This file is part of waLBerla. waLBerla is free software: you can 
+//  This file is part of waLBerla. waLBerla is free software: you can
 //  redistribute it and/or modify it under the terms of the GNU General Public
-//  License as published by the Free Software Foundation, either version 3 of 
+//  License as published by the Free Software Foundation, either version 3 of
 //  the License, or (at your option) any later version.
-//  
-//  waLBerla is distributed in the hope that it will be useful, but WITHOUT 
-//  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
-//  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License 
+//
+//  waLBerla is distributed in the hope that it will be useful, but WITHOUT
+//  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 along
 //  with waLBerla (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
 //
@@ -30,6 +30,7 @@
 #include "SendBuffer.h"
 
 #include "core/debug/Debug.h"
+#include "core/Sanitizer.h"
 
 #include <boost/mpl/logical.hpp>
 #include <boost/type_traits/is_enum.hpp>
@@ -388,6 +389,7 @@ inline bool GenericRecvBuffer<T>::isEmpty() const
 */
 template< typename T >  // Element type
 template< typename V >  // Type of the built-in data value
+ATTRIBUTE_NO_SANITIZE_UNDEFINED
 typename boost::enable_if< boost::mpl::or_< boost::is_arithmetic<V>, boost::is_enum<V> >,
                            GenericRecvBuffer<T> & >::type
 GenericRecvBuffer<T>::get( V& value )

src/core/mpi/SendBuffer.h

 //======================================================================================================================
 //
-//  This file is part of waLBerla. waLBerla is free software: you can 
+//  This file is part of waLBerla. waLBerla is free software: you can
 //  redistribute it and/or modify it under the terms of the GNU General Public
-//  License as published by the Free Software Foundation, either version 3 of 
+//  License as published by the Free Software Foundation, either version 3 of
 //  the License, or (at your option) any later version.
-//  
-//  waLBerla is distributed in the hope that it will be useful, but WITHOUT 
-//  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
-//  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License 
+//
+//  waLBerla is distributed in the hope that it will be useful, but WITHOUT
+//  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 along
 //  with waLBerla (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
 //
@@ -32,6 +32,7 @@
 #include "growPolicies/OptimalGrowth.h"
 
 #include "core/debug/Debug.h"
+#include "core/Sanitizer.h"
 
 #include <boost/mpl/logical.hpp>
 #include <boost/type_traits/is_enum.hpp>
@@ -442,6 +443,7 @@ inline bool GenericSendBuffer<T,G>::isEmpty() const
 template< typename T    // Element type
           , typename G >  // Growth policy
 template< typename V >  // Type of the built-in data value
+ATTRIBUTE_NO_SANITIZE_UNDEFINED
 typename boost::enable_if< boost::mpl::or_< boost::is_arithmetic<V>, boost::is_enum<V> >,
 GenericSendBuffer<T,G>& >::type
 GenericSendBuffer<T,G>::put( V value )