fence.cpp

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/*******************************************************************\
 
Module: Fences for instrumentation
 
Author: Vincent Nimal
 
Date: February 2012
 
\*******************************************************************/

 
#include "fence.h"
 
#include <util/namespace.h>
#include <util/symbol.h>
 
bool is_fence(
  const goto_programt::instructiont &instruction,
  const namespacet &ns)
{
  return (instruction.is_function_call() &&
          ns.lookup(to_symbol_expr(instruction.call_function())).base_name ==
            "fence")
         /* if assembly-sensitive algorithms are not available */
         || (instruction.is_other() &&
             instruction.code().get_statement() == ID_fence &&
             instruction.code().get_bool(ID_WWfence) &&
             instruction.code().get_bool(ID_WRfence) &&
             instruction.code().get_bool(ID_RWfence) &&
             instruction.code().get_bool(ID_RRfence));
}
 
bool is_lwfence(
  const goto_programt::instructiont &instruction,
  const namespacet &ns)
{
  return (instruction.is_function_call() &&
          ns.lookup(to_symbol_expr(instruction.call_function())).base_name ==
            "lwfence")
         /* if assembly-sensitive algorithms are not available */
         || (instruction.is_other() &&
             instruction.code().get_statement() == ID_fence &&
             instruction.code().get_bool(ID_WWfence) &&
             instruction.code().get_bool(ID_RWfence) &&
             instruction.code().get_bool(ID_RRfence));
}