Esempio n. 1
0
void Driver<Sage>::addPointerToTopParentDeclaration(SgSymbol * symbol, unsigned file_id) {
  SgSymbol * parent = symbol;
  std::map<SgSymbol *, SgSymbol *>::const_iterator it_parent = p_parent_map.find(symbol);
  assert(it_parent != p_parent_map.end());
  while (it_parent->second != NULL) {
    parent = it_parent->second;
    it_parent = p_parent_map.find(parent);
    assert(it_parent != p_parent_map.end());
  }
  assert(parent != NULL);

  SgDeclarationStatement * decl_to_add = NULL;
  SgVariableSymbol * var_sym = isSgVariableSymbol(parent);
  if (var_sym != NULL) {
    assert(var_sym == symbol);

    SgInitializedName * init_name = isSgInitializedName(var_sym->get_symbol_basis());
    assert(init_name != NULL);

    // TODO
  }
  else
    decl_to_add = isSgDeclarationStatement(parent->get_symbol_basis());
  assert(decl_to_add != NULL);

  std::map<unsigned, SgSourceFile *>::iterator it_file = id_to_file_map.find(file_id);
  assert(it_file != id_to_file_map.end());
  SgSourceFile * file = it_file->second;
  assert(file != NULL);

  SgGlobal * global_scope = file->get_globalScope();
  assert(global_scope != NULL);

  const std::vector<SgDeclarationStatement *> & declaration_list = global_scope->getDeclarationList();
  if (find(declaration_list.begin(), declaration_list.end(), decl_to_add) == declaration_list.end())
    SageInterface::prependStatement(decl_to_add, global_scope);
}
Esempio n. 2
0
  void instr(SgProject* project, Rose_STL_Container<SgType*> types)
  {
    SgGlobal* global = SI::getFirstGlobalScope(project);
    std::string prefix("rtc_ti_"); //struct prefix
    std::string ti_type_str("struct rtc_typeinfo*");
    SgType* ti_type = SB::buildOpaqueType(ti_type_str,global);

    //Insert declarations from the typechecking library.

    //void minalloc_check(unsigned long long addr)
    SgFunctionDeclaration* minalloc_check_decl = SB::buildNondefiningFunctionDeclaration(
          SgName("minalloc_check"),
          SgTypeVoid::createType(),
          SB::buildFunctionParameterList(
            SB::buildInitializedName("addr",SB::buildUnsignedLongLongType())),
          global,NULL);
    SI::prependStatement(minalloc_check_decl,global);

    //void typetracker_add(unsigned long long addr, struct rtc_typeinfo* ti);
    SgFunctionDeclaration* typetracker_add_decl = SB::buildNondefiningFunctionDeclaration(
          SgName("typetracker_add"),
          SgTypeVoid::createType(),
          SB::buildFunctionParameterList(
            SB::buildInitializedName("addr",SB::buildUnsignedLongLongType()),
            SB::buildInitializedName("ti",ti_type)),
          global,NULL);
    SI::prependStatement(typetracker_add_decl,global);

    //void setBaseType(rtc_typeinfo* ti, rtc_typeinfo* base)
    SgFunctionDeclaration* setBaseType_decl = SB::buildNondefiningFunctionDeclaration(
          SgName("setBaseType"),
          SgTypeVoid::createType(),
          SB::buildFunctionParameterList(
            SB::buildInitializedName("ti",ti_type),
            SB::buildInitializedName("base",ti_type)),
          global,NULL);
    SI::prependStatement(setBaseType_decl,global);

    //struct rtc_typeinfo* ti_init(const char* a, size_t sz, int c)
    SgFunctionDeclaration* ti_init_decl = SB::buildNondefiningFunctionDeclaration(
                                            SgName("ti_init"),
                                            ti_type,
                                            SB::buildFunctionParameterList(
//    SB::buildInitializedName("a",SB::buildPointerType(SB::buildConstType(SB::buildCharType()))),
                                                SB::buildInitializedName("a",SB::buildPointerType(SB::buildCharType())),
//    SB::buildInitializedName("sz", SB::buildOpaqueType("size_t",global)),
                                                SB::buildInitializedName("sz", SB::buildLongLongType()),
                                                SB::buildInitializedName("c", SB::buildIntType())),
                                            global,NULL);
    SI::prependStatement(ti_init_decl,global);

    //void traverseAndPrint()
    SgFunctionDeclaration* traverseAndPrint_decl = SB::buildNondefiningFunctionDeclaration(
          SgName("traverseAndPrint"),SgTypeVoid::createType(),SB::buildFunctionParameterList(),global,NULL);
    SI::prependStatement(traverseAndPrint_decl,global);

    //non-defining declaration of rtc_init_typeinfo
    SgName init_name("rtc_init_typeinfo");
    SgFunctionDeclaration* init_nondef = SB::buildNondefiningFunctionDeclaration(init_name,SgTypeVoid::createType(),SB::buildFunctionParameterList(),global,NULL);
    SI::prependStatement(init_nondef,global);

    //call to rtc_init_typeinfo placed in main function.
    SgFunctionDeclaration* maindecl = SI::findMain(project);
    SgExprStatement* initcall = SB::buildFunctionCallStmt(init_name,SgTypeVoid::createType(),NULL,maindecl->get_definition());
    maindecl->get_definition()->prepend_statement(initcall);

    //defining declaration of rtc_init_typeinfo
    SgFunctionDeclaration* init_definingDecl = new SgFunctionDeclaration(new Sg_File_Info(SI::getEnclosingFileNode(global)->getFileName()),init_name,init_nondef->get_type(),NULL);
    init_definingDecl->set_firstNondefiningDeclaration(init_nondef);
    SgFunctionDefinition* init_definition = new SgFunctionDefinition(new Sg_File_Info(SI::getEnclosingFileNode(global)->getFileName()),init_definingDecl,SB::buildBasicBlock());
    init_definingDecl->set_definition(init_definition);
    SI::appendStatement(init_definingDecl,global);

    std::vector<std::string> lst;
    for(unsigned int index = 0; index < types.size(); index++)
    {
      SgType* ptr = types[index];

      ptr = ptr->stripTypedefsAndModifiers();
      if(!shouldInstrumentType(ptr))
        continue;
      std::string nameStr = prefix + Util::getNameForType(ptr).getString();
      if(!contains(lst,nameStr))
      {
        SgVariableDeclaration* decl = SB::buildVariableDeclaration(nameStr,ti_type,NULL,global);
        SI::prependStatement(decl,global);
        lst.push_back(nameStr);
      }
    }

    for(unsigned int index = 0; index < types.size(); index++)
    {
      SgType* ptr = types[index];
      ptr = ptr->stripTypedefsAndModifiers();
      if(!shouldInstrumentType(ptr))
        continue;
      std::string typeNameStr = Util::getNameForType(ptr).getString();
      std::string structNameStr = prefix + Util::getNameForType(ptr).getString();

      if(contains(lst,structNameStr))
      {
        SgExpression* lhs;
        SgExpression* rhs;

        //In case of an anonymous struct or union, we create a local, named version of the declaration so we can know its size.
        SgClassDeclaration* altDecl = NULL;
        if(isSgNamedType(ptr) && isSgClassDeclaration(isSgNamedType(ptr)->get_declaration()) && isSgClassDeclaration(isSgNamedType(ptr)->get_declaration())->get_isUnNamed())
        {
          SgClassDeclaration* originalDecl = isSgClassDeclaration(isSgNamedType(ptr)->get_declaration()->get_definingDeclaration());
          SgName altDecl_name(typeNameStr + "_def");
          altDecl = new SgClassDeclaration(new Sg_File_Info(SI::getEnclosingFileNode(global)->getFileName()),altDecl_name,originalDecl->get_class_type());

          SgClassDefinition* altDecl_definition = SB::buildClassDefinition(altDecl);

          SgDeclarationStatementPtrList originalMembers = originalDecl->get_definition()->get_members();
          for(SgDeclarationStatementPtrList::iterator it = originalMembers.begin(); it != originalMembers.end(); it++)
          {
            SgDeclarationStatement* member = *it;
            SgDeclarationStatement* membercpy = isSgDeclarationStatement(SI::copyStatement(member));
            altDecl_definition->append_member(membercpy);
          }


          SgClassDeclaration* altDecl_nondef = new SgClassDeclaration(new Sg_File_Info(SI::getEnclosingFileNode(global)->getFileName()),altDecl_name,originalDecl->get_class_type());

          altDecl_nondef->set_scope(global);
          altDecl->set_scope(global);

          altDecl->set_firstNondefiningDeclaration(altDecl_nondef);
          altDecl_nondef->set_firstNondefiningDeclaration(altDecl_nondef);
          altDecl->set_definingDeclaration(altDecl);
          altDecl_nondef->set_definingDeclaration(altDecl);


          SgClassType* altDecl_ct = SgClassType::createType(altDecl_nondef);
          altDecl->set_type(altDecl_ct);
          altDecl_nondef->set_type(altDecl_ct);

          altDecl->set_isUnNamed(false);
          altDecl_nondef->set_isUnNamed(false);

          altDecl_nondef->set_forward(true);

          SgSymbol* sym = new SgClassSymbol(altDecl_nondef);
          global->insert_symbol(altDecl_name, sym);

          altDecl->set_linkage("C");
          altDecl_nondef->set_linkage("C");

          ROSE_ASSERT(sym && sym->get_symbol_basis() == altDecl_nondef);
          ROSE_ASSERT(altDecl->get_definingDeclaration() == altDecl);
          ROSE_ASSERT(altDecl->get_firstNondefiningDeclaration() == altDecl_nondef);
          ROSE_ASSERT(altDecl->search_for_symbol_from_symbol_table() == sym);
          ROSE_ASSERT(altDecl->get_definition() == altDecl_definition);
          ROSE_ASSERT(altDecl->get_scope() == global && altDecl->get_scope() == altDecl_nondef->get_scope());
          ROSE_ASSERT(altDecl_ct->get_declaration() == altDecl_nondef);

          //For some reason, this is not working...

          //global->append_statement(altDecl);
          //global->prepend_statement(altDecl_nondef);

          //SI::setOneSourcePositionForTransformation(altDecl);
          //SI::setOneSourcePositionForTransformation(altDecl_nondef);
        }

        SgType* baseType;
        if(isSgPointerType(ptr))
          baseType = ptr->dereference();
        else
          baseType = ptr->findBaseType();

        baseType = baseType->stripTypedefsAndModifiers();
        if(baseType == NULL || baseType == ptr)
        {
          //In this case, there is no base type.
          rhs = SB::buildFunctionCallExp(SgName("ti_init"),SgTypeVoid::createType(),SB::buildExprListExp(
                                           SB::buildStringVal(ptr->unparseToString()),
                                           ((altDecl == NULL && !isSgTypeVoid(ptr)) ? (SgExpression*) SB::buildSizeOfOp(types[index]) : (SgExpression*) SB::buildIntVal(-1)),
                                           SB::buildIntVal(getClassification(ptr))
                                         ),init_definition);
        }
        else
        {
          //The type has a base type.
          std::string baseStructNameStr = prefix + Util::getNameForType(baseType).getString();
          rhs = SB::buildFunctionCallExp(SgName("ti_init"),ti_type,SB::buildExprListExp(
                                           SB::buildStringVal(ptr->unparseToString()),
                                           ((altDecl == NULL && !isSgTypeVoid(ptr)) ? (SgExpression*) SB::buildSizeOfOp(types[index]) : (SgExpression*) SB::buildIntVal(-1)),
                                           SB::buildIntVal(getClassification(ptr))
                                         ),init_definition);

          SgExprStatement* set_BT = SB::buildFunctionCallStmt(SgName("setBaseType"),ti_type,SB::buildExprListExp(
                                      SB::buildVarRefExp(structNameStr),
                                      SB::buildVarRefExp(baseStructNameStr)),
                                    init_definition);
          init_definition->append_statement(set_BT);
        }
        lhs = SB::buildVarRefExp(structNameStr);


        SgExprStatement* assignstmt = SB::buildAssignStatement(lhs,rhs);
        init_definition->prepend_statement(assignstmt);
        std::remove(lst.begin(),lst.end(),structNameStr);

      }



    }
  }
// DQ (8/23/2011): Made this a static function so that I could call it from the Java support.
void
FixupAstSymbolTablesToSupportAliasedSymbols::injectSymbolsFromReferencedScopeIntoCurrentScope ( SgScopeStatement* referencedScope, SgScopeStatement* currentScope, SgNode* causalNode, SgAccessModifier::access_modifier_enum accessLevel )
   {
     ROSE_ASSERT(referencedScope != NULL);
     ROSE_ASSERT(currentScope    != NULL);

#if ALIAS_SYMBOL_DEBUGGING || 0
     printf ("In injectSymbolsFromReferencedScopeIntoCurrentScope(): referencedScope = %p = %s currentScope = %p = %s accessLevel = %d \n",referencedScope,referencedScope->class_name().c_str(),currentScope,currentScope->class_name().c_str(),accessLevel);
#endif

     SgSymbolTable* symbolTable = referencedScope->get_symbol_table();
     ROSE_ASSERT(symbolTable != NULL);
     
#if 0
     printf ("AST Fixup: Building Symbol Table for %p = %s at: \n",scope,scope->sage_class_name());
     referencedScope->get_file_info()->display("Symbol Table Location");
#endif

     SgClassDefinition* classDefinition = isSgClassDefinition(referencedScope);
     if (classDefinition != NULL)
        {
       // If this is a class definition, then we need to make sure that we only for alias symbols for those declarations.
#if ALIAS_SYMBOL_DEBUGGING
          printf ("Injection of symbols from a class definition needs to respect access priviledge (private, protected, public) declarations \n");
#endif
        }

     SgSymbolTable::BaseHashType* internalTable = symbolTable->get_table();
     ROSE_ASSERT(internalTable != NULL);

     int counter = 0;
     SgSymbolTable::hash_iterator i = internalTable->begin();
     while (i != internalTable->end())
        {
       // DQ: removed SgName casting operator to char*
       // cout << "[" << idx << "] " << (*i).first.str();
          ROSE_ASSERT ( (*i).first.str() != NULL );
          ROSE_ASSERT ( isSgSymbol( (*i).second ) != NULL );

#if ALIAS_SYMBOL_DEBUGGING
          printf ("Symbol number: %d (pair.first (SgName) = %s) pair.second (SgSymbol) class_name() = %s \n",counter,(*i).first.str(),(*i).second->class_name().c_str());
#endif
          SgName name      = (*i).first;
          SgSymbol* symbol = (*i).second;

          ROSE_ASSERT ( symbol != NULL );

       // Make sure that this is not a SgLabelSymbol, I think these should not be aliased
       // (if only because I don't think that C++ support name qualification for labels).
          ROSE_ASSERT ( isSgLabelSymbol(symbol) == NULL );

       // DQ (6/22/2011): For now skip the handling of alias symbol from other scopes.
       // ROSE_ASSERT(isSgAliasSymbol(symbol) == NULL);
          if (isSgAliasSymbol(symbol) != NULL)
             {
#if ALIAS_SYMBOL_DEBUGGING
               printf ("WARNING: Not clear if we want to nest SgAliasSymbol inside of SgAliasSymbol \n");
#endif
            // DQ (9/22/2012): We need to avoid building chains of SgAliasSymbol (to simplify the representation in the AST).
               while (isSgAliasSymbol(symbol) != NULL)
                  {
#if ALIAS_SYMBOL_DEBUGGING
                    printf (" --- Iterating to root of alias: symbol = %p = %s \n",symbol,symbol->class_name().c_str());
#endif
                    symbol = isSgAliasSymbol(symbol)->get_alias();
                    ROSE_ASSERT(symbol != NULL);
                  }

#if ALIAS_SYMBOL_DEBUGGING
               printf ("Resolved aliased symbol to root symbol: symbol = %p = %s \n",symbol,symbol->class_name().c_str());
#endif
             }

          SgNode* symbolBasis = symbol->get_symbol_basis();
          ROSE_ASSERT(symbolBasis != NULL);
#if ALIAS_SYMBOL_DEBUGGING
          printf ("symbolBasis = %p = %s \n",symbolBasis,symbolBasis->class_name().c_str());
#endif
       // SgDeclarationStatement* declarationFromSymbol = symbol->get_declaration();
          SgDeclarationStatement* declarationFromSymbol = isSgDeclarationStatement(symbolBasis);

          SgAccessModifier::access_modifier_enum declarationAccessLevel = SgAccessModifier::e_unknown;

       // ROSE_ASSERT(declarationFromSymbol != NULL);
          if (declarationFromSymbol != NULL)
             {
            // DQ (6/22/2011): Can I, or should I, do relational operations on enum values (note that the values are designed to allow this).
               declarationAccessLevel = declarationFromSymbol->get_declarationModifier().get_accessModifier().get_modifier();
             }
            else
             {
               SgInitializedName* initializedNameFromSymbol = isSgInitializedName(symbolBasis);
               ROSE_ASSERT(initializedNameFromSymbol != NULL);

            // DQ (9/8/2014): This fails for test2013_234, 235, 240, 241, 242, 246.C.
            // ROSE_ASSERT(initializedNameFromSymbol->get_declptr() != NULL);
            // declarationAccessLevel = initializedNameFromSymbol->get_declptr()->get_declarationModifier().get_accessModifier().get_modifier();
               if (initializedNameFromSymbol->get_declptr() != NULL)
                  {
                    declarationAccessLevel = initializedNameFromSymbol->get_declptr()->get_declarationModifier().get_accessModifier().get_modifier();
                  }
                 else
                  {
                    mprintf ("WARNING: In injectSymbolsFromReferencedScopeIntoCurrentScope(): initializedNameFromSymbol->get_declptr() == NULL: initializedNameFromSymbol->get_name() = %s \n",initializedNameFromSymbol->get_name().str());
                  }
             }

#if ALIAS_SYMBOL_DEBUGGING || 0
          printf ("declarationAccessLevel = %d accessLevel = %d \n",declarationAccessLevel,accessLevel);
#endif

#if 0
       // DQ (12/23/2015): Is this only supporting the SgBaseClass IR nodes? No, another example is the case of a SgUsingDirectiveStatement.
          ROSE_ASSERT(causalNode != NULL);
          if (isSgBaseClass(causalNode) == NULL)
             {
               printf ("ERROR: This is not a SgBaseClass: causalNode = %p = %s \n",causalNode,causalNode->class_name().c_str());
               ROSE_ASSERT(false);
             }
#endif

       // DQ (12/23/2015): See test2015_140.C for where even private base classes will require representations 
       // of it's symbols in the derived class (to support correct name qualification).
       // if (declarationAccessLevel >= accessLevel)
          if ( (declarationAccessLevel >= accessLevel) || isSgBaseClass(causalNode) != NULL)
             {
            // This declaration is visible, so build an alias.

            // DQ (7/24/2011): Need to make sure that the symbol is not already present in the symbol table 
            // (else injection would be redundant. This is a likely key to the problem we are having with 
            // symbol table explosions for some codes.  This should be refactored to a member function of 
            // the symbol table support.
            // Note that this change improves the performance from 15 minutes to 5 seconds for the outlining example.
               bool alreadyExists = currentScope->symbol_exists(name);
               if (alreadyExists == true)
                  {
                 // Just because the names match is not strong enough.
                 // SgSymbol* symbol currentScope->symbol_exists(name);
                    switch (symbol->variantT())
                       {
                         case V_SgAliasSymbol:
                            {
                           // not clear what to do here...
                           // I think we need more symbol table support for detecting matching symbols.
                           // I think we also need more alias symbol specific query support.
                              break;
                            }

                      // DQ (11/10/2014): Added support for templated typedef symbols.
                         case V_SgTemplateTypedefSymbol:

                         case V_SgEnumSymbol:
                         case V_SgVariableSymbol:
                         case V_SgTemplateClassSymbol:
                         case V_SgClassSymbol:
                         case V_SgTemplateFunctionSymbol:
                         case V_SgTemplateMemberFunctionSymbol:
                         case V_SgFunctionSymbol:
                         case V_SgMemberFunctionSymbol:
                         case V_SgTypedefSymbol:
                         case V_SgEnumFieldSymbol:
                         case V_SgNamespaceSymbol:
                         case V_SgTemplateSymbol:
                         case V_SgLabelSymbol:
                         {
                           // Liao, 10/31/2012. 
                           // Using lookup_function_symbol () etc. is not good enough since it returns the first match only.
                           // There might be multiple hits. We have to go through them all instead of checking only the first hit
                              alreadyExists = false; // reset to be false
                             // using less expensive equal_range(), which can be O(logN) instead of O(N)
                              // This matters since this function is called inside another loop with complexity of O(N) already.
                              rose_hash_multimap * internal_table = currentScope->get_symbol_table()->get_table();
                              ROSE_ASSERT (internal_table != NULL);
                              std::pair<rose_hash_multimap::iterator, rose_hash_multimap::iterator> range = internal_table ->equal_range (name);
                              for (rose_hash_multimap::iterator i = range.first; i != range.second; ++i)
                              {
                                SgSymbol * orig_current_symbol = i->second; 
                                ROSE_ASSERT (orig_current_symbol != NULL);
                                // strip off alias symbols
                                SgSymbol * non_alias_symbol = orig_current_symbol; 
                                while (isSgAliasSymbol(non_alias_symbol))
                                {
                                  non_alias_symbol = isSgAliasSymbol(non_alias_symbol) ->get_alias();
                                  ROSE_ASSERT (non_alias_symbol != NULL);
                                }
                                SgNode* associatedDeclaration = i->second->get_symbol_basis();
                                assert(associatedDeclaration != NULL);
                                // same basis and same symbol type
                                // The assumption is that no two symbols can share the same basis declaration TODO double check this!
                                if (associatedDeclaration == symbolBasis && (non_alias_symbol->variantT() == symbol->variantT()))
                                {
                                  alreadyExists = true;
                                  break;
                                }
                              } // end for
                              break;
                           }


#if 0 // uniform handling by code above now
                         case V_SgEnumSymbol:
                            {
                           // alreadyExists = (currentScope->lookup_enum_symbol(name) != NULL);
                              SgEnumSymbol* tmpSymbol = currentScope->lookup_enum_symbol(name);
                              if (tmpSymbol != NULL)
                                 {
                                   SgNode* tmpSymbolBasis = tmpSymbol->get_symbol_basis();
                                   ROSE_ASSERT(tmpSymbolBasis != NULL);
                                   alreadyExists = (tmpSymbolBasis == symbolBasis);
                                 }
                              break;
                            }

                         case V_SgVariableSymbol:
                            {
                           // alreadyExists = (currentScope->lookup_variable_symbol(name) != NULL);
                              SgVariableSymbol* tmpSymbol = currentScope->lookup_variable_symbol(name);
                              if (tmpSymbol != NULL)
                                 {
                                   SgNode* tmpSymbolBasis = tmpSymbol->get_symbol_basis();
                                   ROSE_ASSERT(tmpSymbolBasis != NULL);
                                   alreadyExists = (tmpSymbolBasis == symbolBasis);
                                 }
                              break;
                            }

                      // DQ (2/12/2012): Not clear if this is the best way to add this support.
                         case V_SgTemplateClassSymbol:
                         case V_SgClassSymbol:
                            {
                           // alreadyExists = (currentScope->lookup_class_symbol(name) != NULL);
                              SgClassSymbol* tmpSymbol = currentScope->lookup_class_symbol(name);
                              if (tmpSymbol != NULL)
                                 {
                                   SgNode* tmpSymbolBasis = tmpSymbol->get_symbol_basis();
                                   ROSE_ASSERT(tmpSymbolBasis != NULL);
                                   alreadyExists = (tmpSymbolBasis == symbolBasis);
                                 }
                              break;
                            }
#if 0
                      // DQ (2/12/2012): Added support for SgTemplateFunctionSymbol.
                         case V_SgTemplateFunctionSymbol:
                            {
                              SgTemplateFunctionSymbol* tmpSymbol = currentScope->lookup_template_function_symbol(name);
                              if (tmpSymbol != NULL)
                                 {
                                   SgNode* tmpSymbolBasis = tmpSymbol->get_symbol_basis();
                                   ROSE_ASSERT(tmpSymbolBasis != NULL);
                                   alreadyExists = (tmpSymbolBasis == symbolBasis);
                                 }
                              break;
                            }

                      // DQ (2/12/2012): Added support for SgTemplateMemberFunctionSymbol.
                         case V_SgTemplateMemberFunctionSymbol:
                            {
                              SgTemplateMemberFunctionSymbol* tmpSymbol = currentScope->lookup_template_member_function_symbol(name);
                              if (tmpSymbol != NULL)
                                 {
                                   SgNode* tmpSymbolBasis = tmpSymbol->get_symbol_basis();
                                   ROSE_ASSERT(tmpSymbolBasis != NULL);
                                   alreadyExists = (tmpSymbolBasis == symbolBasis);
                                 }
                              break;
                            }
#else
                      // DQ (2/12/2012): Not clear if this is the best way to add this support.
                         case V_SgTemplateFunctionSymbol:
                         case V_SgTemplateMemberFunctionSymbol:
#endif
                         case V_SgFunctionSymbol:
                         case V_SgMemberFunctionSymbol:
                            {
                            // alreadyExists = (currentScope->lookup_function_symbol(name) != NULL);
                              SgFunctionSymbol* tmpSymbol = currentScope->lookup_function_symbol(name);
                              if (tmpSymbol != NULL)
                                 {
                                   SgNode* tmpSymbolBasis = tmpSymbol->get_symbol_basis();
                                   ROSE_ASSERT(tmpSymbolBasis != NULL);
                                   alreadyExists = (tmpSymbolBasis == symbolBasis);
                                 }
                             break;
                            }
                         case V_SgTypedefSymbol:
                            {
                           // alreadyExists = (currentScope->lookup_typedef_symbol(name) != NULL);
                              SgTypedefSymbol* tmpSymbol = currentScope->lookup_typedef_symbol(name);
                              if (tmpSymbol != NULL)
                                 {
                                   SgNode* tmpSymbolBasis = tmpSymbol->get_symbol_basis();
                                   ROSE_ASSERT(tmpSymbolBasis != NULL);
                                   alreadyExists = (tmpSymbolBasis == symbolBasis);
                                 }
                              break;
                            }
                         case V_SgEnumFieldSymbol:
                            {
                           // alreadyExists = (currentScope->lookup_enum_field_symbol(name) != NULL);
                              SgEnumFieldSymbol* tmpSymbol = currentScope->lookup_enum_field_symbol(name);
                              if (tmpSymbol != NULL)
                                 {
                                   SgNode* tmpSymbolBasis = tmpSymbol->get_symbol_basis();
                                   ROSE_ASSERT(tmpSymbolBasis != NULL);
                                   alreadyExists = (tmpSymbolBasis == symbolBasis);
                                 }
                              break;
                            }

                         case V_SgNamespaceSymbol:
                            {
                           // alreadyExists = (currentScope->lookup_namespace_symbol(name) != NULL);
                              SgNamespaceSymbol* tmpSymbol = currentScope->lookup_namespace_symbol(name);
                              if (tmpSymbol != NULL)
                                 {
                                   SgNode* tmpSymbolBasis = tmpSymbol->get_symbol_basis();
                                   ROSE_ASSERT(tmpSymbolBasis != NULL);
                                   alreadyExists = (tmpSymbolBasis == symbolBasis);
                                 }
                              break;
                            }

                         case V_SgTemplateSymbol:
                            {
                           // alreadyExists = (currentScope->lookup_template_symbol(name) != NULL);
                              SgTemplateSymbol* tmpSymbol = currentScope->lookup_template_symbol(name);
                              if (tmpSymbol != NULL)
                                 {
                                   SgNode* tmpSymbolBasis = tmpSymbol->get_symbol_basis();
                                   ROSE_ASSERT(tmpSymbolBasis != NULL);
                                   alreadyExists = (tmpSymbolBasis == symbolBasis);
                                 }
                              break;
                            }

                         case V_SgLabelSymbol:
                            {
                           // alreadyExists = (currentScope->lookup_label_symbol(name) != NULL);
                              SgLabelSymbol* tmpSymbol = currentScope->lookup_label_symbol(name);
                              if (tmpSymbol != NULL)
                                 {
                                   SgNode* tmpSymbolBasis = tmpSymbol->get_symbol_basis();
                                   ROSE_ASSERT(tmpSymbolBasis != NULL);
                                   alreadyExists = (tmpSymbolBasis == symbolBasis);
                                 }
                              break;
                            }

#endif
                         default:
                              printf ("Error: default reached in switch symbol = %p = %s \n",symbol,symbol->class_name().c_str());
                              ROSE_ASSERT(false);
                              break;
                       }
                  }
               
               if ( alreadyExists == false)
                  {
#if 0
                    printf ("Building a SgAliasSymbol \n");
#endif
                 // DQ: The parameter to a SgAliasSymbol is a SgSymbol (but should not be another SgAliasSymbol).
                    SgAliasSymbol* aliasSymbol = new SgAliasSymbol(symbol);
                    ROSE_ASSERT(aliasSymbol != NULL);

                 // DQ (7/12/2014): Added support to trace back the SgAliasSymbol to the declarations that caused it to be added.
                    ROSE_ASSERT(causalNode != NULL);
                    aliasSymbol->get_causal_nodes().push_back(causalNode);

#if ALIAS_SYMBOL_DEBUGGING
                 // printf ("In injectSymbolsFromReferencedScopeIntoCurrentScope(): Adding symbol to new scope as a SgAliasSymbol = %p causalNode = %p = %s \n",aliasSymbol,causalNode,causalNode->class_name().c_str());
                    printf ("In injectSymbolsFromReferencedScopeIntoCurrentScope(): Adding symbol to new scope (currentScope = %p = %s) as a SgAliasSymbol = %p causalNode = %p = %s \n",currentScope,currentScope->class_name().c_str(),aliasSymbol,causalNode,causalNode->class_name().c_str());
#endif
                 // Use the current name and the alias to the symbol
                    currentScope->insert_symbol(name, aliasSymbol);

#if ALIAS_SYMBOL_DEBUGGING
                    printf ("In injectSymbolsFromReferencedScopeIntoCurrentScope(): DONE: Adding symbol to new scope (currentScope = %p = %s) as a SgAliasSymbol = %p causalNode = %p = %s \n",currentScope,currentScope->class_name().c_str(),aliasSymbol,causalNode,causalNode->class_name().c_str());
#endif
                  }
             }
            else
             {
#if ALIAS_SYMBOL_DEBUGGING
               printf ("NO SgAliasSymbol ADDED (wrong permissions): declarationFromSymbol = %p \n",declarationFromSymbol);
#endif
             }
#if 0
       // Older version of code...
       // SgAliasSymbol* aliasSymbol = new SgAliasSymbol (SgSymbol *alias=NULL, bool isRenamed=false, SgName new_name="")
          SgAliasSymbol* aliasSymbol = new SgAliasSymbol (symbol);

       // Use the current name and the alias to the symbol
          currentScope->insert_symbol(name, aliasSymbol);
#endif

       // Increment iterator and counter
          i++;
          counter++;
        }

#if 0
  // debugging
     symbolTable->print("In injectSymbolsFromReferencedScopeIntoCurrentScope(): printing out the symbol tables");
#endif
#if ALIAS_SYMBOL_DEBUGGING
     printf ("In injectSymbolsFromReferencedScopeIntoCurrentScope(): referencedScope = %p = %s currentScope = %p = %s accessLevel = %d \n",referencedScope,referencedScope->class_name().c_str(),currentScope,currentScope->class_name().c_str(),accessLevel);
#endif
   }