int WalkAST::ReturnDefLevel(Expr *E){
int levelflag = 0; // 1 for *, -1 for &
// deflevel++;
E = E->IgnoreParenLValueCasts();
switch (E->getStmtClass()){
case Stmt::ArraySubscriptExprClass: {
// ArraySubscriptExpr *AE = cast<ArraySubscriptExpr>(E->getLHS()); //UnaryOperator *U = cast<UnaryOperator>(E->getLHS());
//U->getSubExpr()->IgnoreParens()->dump();
E = (cast<ArraySubscriptExpr>(E))->getBase()->IgnoreParenCasts();
levelflag = 1;
break;
}
case Stmt::UnaryOperatorClass: {
UnaryOperator *UO = dyn_cast<UnaryOperator>(E);
if (UO->getOpcode() == UO_Deref){
//E->dump();
levelflag = 1;
}
else if(UO->getOpcode() == UO_AddrOf){
//E->dump();
levelflag = -1;
}
E = (cast<UnaryOperator>(E))->getSubExpr()->IgnoreParens();
//E = ICE->getSubExpr();
break;
}
case Stmt::MemberExprClass: {
E = (cast<MemberExpr>(E))->getBase()->IgnoreParenCasts();
levelflag = 1;
break;
}
default:
break;
}
if (DeclRefExpr *drE = dyn_cast<DeclRefExpr>(E->IgnoreParenLValueCasts())){
// std::cerr<<" at level "<<deflevel<<" of var "<<drE->getDecl()->getNameAsString()<<std::endl;
std::cerr<< " of var "<<drE->getDecl()->getNameAsString() ;
return levelflag;
}
//std::cerr<<"#### at level " << levelflag << std::endl;
//E->dump();
return levelflag + WalkAST::ReturnDefLevel(E);
}
bool isInvertedLogic(Expr *condExpr)
{
BinaryOperator *binaryOperator = dyn_cast<BinaryOperator>(condExpr);
UnaryOperator *unaryOperator = dyn_cast<UnaryOperator>(condExpr);
return (binaryOperator && binaryOperator->getOpcode() == BO_NE) ||
(unaryOperator && unaryOperator->getOpcode() == UO_LNot);
}
void FakeDirectiveHandler::HandleUnaryOperator(DeclRefExpr * Original,
Expr * Var,
Expr * Next,
vector<LocalStmtPair> WritePairs,
bool ActualVar,
string Struct) {
UnaryOperator * UO = dyn_cast<UnaryOperator>(Next);
// Var++ etc.
if (UO->isIncrementDecrementOp()) {
InsertAccess(Var, Original, false, WritePairs, ActualVar, Struct);
InsertAccess(Var, Original, true, WritePairs, ActualVar, Struct);
// *Var
} else if (UO->getOpcode() == clang::UO_Deref) {
InsertAccess(Var, Original, false, WritePairs, ActualVar, Struct);
ActualVar = true;
} else {
InsertAccess(Var, Original, false, WritePairs, ActualVar, Struct);
ActualVar = false;
}
if (IsPointerType(Var)) {
WalkUpExpr(Original, UO, WritePairs, ActualVar, Struct);
}
}
bool isRedundantNilCheck(BinaryOperator *binaryOperator)
{
if(binaryOperator->getOpcode() == BO_LAnd && isNeNullCheck(binaryOperator->getLHS()))
{
UnaryOperator *unaryOperator =
dyn_cast_or_null<UnaryOperator>(binaryOperator->getRHS());
if (unaryOperator)
{
return unaryOperator->getOpcode() != UO_LNot;
}
return true;
}
return false;
}
/*
this helper function is called when the traversal reaches a node of type Stmt
*/
void StmtHelper(Stmt *x){
//variable used for <cond> </cond>
//bool condition = false;
bool isElse = false;
if(x != NULL){
string output = "";
//find current level and next level
int intLevel = getLevelStmt(x); int intNextLevel = intLevel+1;
//convert them both to strings to use for output
string level; string nextLevel;
stringstream ss;
ss << intLevel;
level = ss.str();
stringstream ss2;
ss2 << intNextLevel;
nextLevel = ss2.str();
const Stmt* parent = getStmtParent(x, Context);
//PROBLEM
if(x->getStmtClassName() != std::string("ForStmt") && isFlowControl(x, Context)){
//return;
}
//if the parent is calling any type of funciton then this node should be enclosed in <args> </args>
string filename;
if(callStackDebug && !callStack.empty()){
cerr << "stmt: call stack top: " << callStack.top()->getStmtClassName() << endl;
}
while(!callStack.empty() && numClosingArgsNeeded > 0
&& !isParentStmt(parent, callStack.top()->getStmtClassName())){
if(debugPrint){
cerr << "adding args" << endl;
}
numClosingArgsNeeded--;
output += "</args,1>\n";
callStack.pop();
if(callStackDebug){
cerr << "popping" << endl;
printCallStack();
}
}
if(isParentStmtInCurFile(x,"CXXConstructExpr") && isParentStmt(x, "CXXConstructExpr")){
if(debugPrint){
cerr << "setting previousConstructorCall to true" << endl;
}
}else if(isParentStmtInCurFile(x,"CXXTemporaryObjectExpr") && isParentStmt(x, "CXXTemporaryObjectExpr")){
if(debugPrint){
cerr << "setting previousTempConstructorCallArg" << endl;
}
}else if(isParentStmt(x, "CallExpr")){
if(debugPrint){
cerr << "setting previousCallArgs to true" << endl;
}
}else if(isParentStmt(x, "CXXMemberCallExpr")){
if(debugPrint){
cerr << "setting previousMemberCallArgs to true" << endl;
}
}
//if the parent is a variable declaration then this node should be encolsed in <decl> </decl>
if(isParentStmt(x, "Var")){
previousRhsDecl = true;
if(debugPrint){
cout << "setting prev var to true" << endl;
}
}else if(previousRhsDecl && numClosingVarsNeeded > 0){
//if the current node is not a child of a variable declaration
//but the previous node was a child of a variable declation
//then we know to print a </decl>
output +="</variableDecl,1>\n";
numClosingVarsNeeded--;
previousRhsDecl = false;
}
if(parent != NULL && strcmp(parent->getStmtClassName(), "IfStmt") == 0){
if(debugPrint){
cerr << "possibly an if statement" << endl;
}
//find the first child of the if statemt
const Stmt* firstChild = NULL;
auto children = parent->children();
for(const Stmt* child : children){
if(child != NULL){
firstChild = child;
break;
}
}
//if the first child is the current node, then we know it is part of the condition
if(firstChild != NULL && x->getLocStart() == firstChild->getLocStart()){
if(debugPrint){
cerr << "part of the condition" << endl;
}
prevCondition = true;
}else if(prevCondition){
output +="</cond,1>\n";
prevCondition = false;
}
//find if else
const IfStmt* ifstmt = (IfStmt*) parent;
const Stmt* elseStmt = ifstmt->getElse();
if(elseStmt != NULL){
if(debugPrint){
cout << "checking if " << x->getLocStart().printToString(Context->getSourceManager());
cout << " == " << elseStmt->getLocStart().printToString(Context->getSourceManager());
cout << " : " << (x->getLocStart() == elseStmt->getLocStart()) << endl;
}
if(x->getLocStart() == elseStmt->getLocStart()){
isElse = true;
}
}
}
string node = x->getStmtClassName();
if(node == "ReturnStmt"){
output += "<return";
}else if(node == "ForStmt"){
output += "<forLoop";
}else if(node == "WhileStmt"){
output += "<whileLoop";
}else if(node == "DoStmt"){
output += "<do";
}else if(node == "IfStmt"){
if(parent->getStmtClassName() != std::string("IfStmt")){
stringstream ssminus;
ssminus << (intLevel-1);
output += "<ifBlock," + ssminus.str() + ">\n";
intLevel += 1;
stringstream ssif;
ssif << intLevel;
level = ssif.str();
}
output += "<ifStatement";
}else if(node == "SwitchStmt"){
output += "<switch";
}else if(node == "CaseStmt"){
output += "<case";
}else if(node == "CXXMemberCallExpr"){
CXXMemberCallExpr* ce = (CXXMemberCallExpr*) x;
Expr* obj = ce->getImplicitObjectArgument();
CallExpr* expr = (CallExpr*) x;
output += "<object: ";
QualType qt = obj->getType();
output += qt.getBaseTypeIdentifier()->getName().str();
output += "; calling func: ";
output += expr->getDirectCallee()->getNameInfo().getAsString();
output += ", " + level + ">\n";
output += "<args";
numClosingArgsNeeded++;
callStack.push(x);
if(callStackDebug){
cerr << "pushing" << endl;
printCallStack();
}
}else if(node == "CallExpr"){
CallExpr* expr = (CallExpr*) x;
output += "<calling func: ";
output += expr->getDirectCallee()->getNameInfo().getAsString();
output += ", " + level + ">\n";
output += "<args";
numClosingArgsNeeded++;
callStack.push(x);
if(callStackDebug){
cerr << "pushing" << endl;
printCallStack();
}
}else if(node == "CXXConstructExpr"){
CXXConstructExpr* ce = (CXXConstructExpr*) x;
//Decl* CD = ce->getConstructor();
string filename;
//if(isInCurFile(Context, CD, filename)){
CXXMethodDecl* MD = ce->getConstructor();
output += "<calling func: ";
output += MD->getNameInfo().getAsString();
output += "," + level + ">\n";
output += "<args";
numClosingArgsNeeded++;
callStack.push(x);
if(callStackDebug){
cerr << "pushing" << endl;
printCallStack();
}
//}
}else if(node == "BinaryOperator"){
BinaryOperator* binaryOp = (BinaryOperator*) x;
if(binaryOp->isAssignmentOp()){
output += "<assignment";
}else if(binaryOp->isComparisonOp()){
output += "<comparison";
}else{
output += "<binaryOp";
}
}else if(node == "UnaryOperator"){
UnaryOperator* uo = (UnaryOperator*) x;
string op = uo->getOpcodeStr(uo->getOpcode()).str();
if(op != "-"){
output += "<unaryOp";
}
}else if(node == "CompoundAssignOperator"){
output += "<augAssign";
}else if(node == "CompoundStmt"){
if(isElse){
output += "<elseStatement";
}else{
output += "<compoundStmt";
}
}else if(node == "CXXThrowExpr"){
output += "<raisingException";
}else if(node == "CXXTryStmt"){
output += "<try";
}else if(node == "CXXCatchStmt"){
output += "<except";
}else if(node == "CXXOperatorCallExpr"){
CXXOperatorCallExpr* ce = (CXXOperatorCallExpr*) x;
if(ce->isAssignmentOp()){
output += "<assignment";
}
}else if(node == "CXXTemporaryObjectExpr"){
CXXTemporaryObjectExpr* ce = (CXXTemporaryObjectExpr*) x;
Decl* CD = ce->getConstructor();
string filename;
if(isInCurFile(Context, CD, filename)){
CXXMethodDecl* MD = ce->getConstructor();
output += "<calling func: ";
output += MD->getNameInfo().getAsString();
output += "," + level + ">\n";
output += "<args";
numClosingArgsNeeded++;
callStack.push(x);
if(callStackDebug){
cerr << "pushing" << endl;
printCallStack();
}
}
}else if(node == "DeclRefExpr"){
if(parent != NULL && parent->getStmtClassName() == std::string("ImplicitCastExpr")){
DeclRefExpr* dr = (DeclRefExpr*) x;
ValueDecl* d = (ValueDecl*) dr->getDecl();
//cout << d->getQualType().getAsString() << endl;
if(d != NULL){
QualType qt = d->getType();
//cout << qt.getAsString() << endl;
if(qt.getAsString() == "std::vector<int, class std::allocator<int> >::const_reference (std::vector::size_type) const noexcept"){
//string type = io->getName().str();
//cout << type << endl;
//if(type == "vector"){
output += "<expr";
//}
}
}
}
}else{
if(allNodes){
output += "<";
output += node;
output += ">";
}
}
if(output.size() != 0 && !endsIn(output, "</cond,1>\n") &&
!endsIn(output,"</variableDecl,1>\n") && !endsIn(output,"</args,1>\n")
&& !endsIn(output,">") && !endsIn(output, ">\n")){
output += ", " + level + ">";
cout << output << endl;
output = "";
}else if(output.size() != 0){
cout << output << endl;
output = "";
if(debugPrint){
cerr << "printing output" << endl;
}
}
}
}