void QDeleteAll::VisitStmt(clang::Stmt *stmt)
{
// Find a call to QMap/QSet/QHash::values
CXXMemberCallExpr *valuesCall = dyn_cast<CXXMemberCallExpr>(stmt);
if (valuesCall &&
valuesCall->getDirectCallee() &&
valuesCall->getDirectCallee()->getNameAsString() == "values")
{
const std::string valuesClassName = valuesCall->getMethodDecl()->getParent()->getNameAsString();
if (valuesClassName == "QMap" || valuesClassName == "QSet" || valuesClassName == "QHash") { // QMultiHash and QMultiMap automatically supported
// Once found see if the first parent call is qDeleteAll
int i = 1;
Stmt *p = Utils::parent(m_parentMap, stmt, i);
while (p) {
CallExpr *pc = dyn_cast<CallExpr>(p);
if (pc) {
if (pc->getDirectCallee() && pc->getDirectCallee()->getNameAsString() == "qDeleteAll") {
emitWarning(p->getLocStart(), "Calling qDeleteAll with " + valuesClassName + "::values, call qDeleteAll on the container itself");
}
break;
}
++i;
p = Utils::parent(m_parentMap, stmt, i);
}
}
}
}
/// Build calls to await_ready, await_suspend, and await_resume for a co_await
/// expression.
static ReadySuspendResumeResult buildCoawaitCalls(Sema &S, VarDecl *CoroPromise,
SourceLocation Loc, Expr *E) {
OpaqueValueExpr *Operand = new (S.Context)
OpaqueValueExpr(Loc, E->getType(), VK_LValue, E->getObjectKind(), E);
// Assume invalid until we see otherwise.
ReadySuspendResumeResult Calls = {{}, Operand, /*IsInvalid=*/true};
ExprResult CoroHandleRes = buildCoroutineHandle(S, CoroPromise->getType(), Loc);
if (CoroHandleRes.isInvalid())
return Calls;
Expr *CoroHandle = CoroHandleRes.get();
const StringRef Funcs[] = {"await_ready", "await_suspend", "await_resume"};
MultiExprArg Args[] = {None, CoroHandle, None};
for (size_t I = 0, N = llvm::array_lengthof(Funcs); I != N; ++I) {
ExprResult Result = buildMemberCall(S, Operand, Loc, Funcs[I], Args[I]);
if (Result.isInvalid())
return Calls;
Calls.Results[I] = Result.get();
}
// Assume the calls are valid; all further checking should make them invalid.
Calls.IsInvalid = false;
using ACT = ReadySuspendResumeResult::AwaitCallType;
CallExpr *AwaitReady = cast<CallExpr>(Calls.Results[ACT::ACT_Ready]);
if (!AwaitReady->getType()->isDependentType()) {
// [expr.await]p3 [...]
// — await-ready is the expression e.await_ready(), contextually converted
// to bool.
ExprResult Conv = S.PerformContextuallyConvertToBool(AwaitReady);
if (Conv.isInvalid()) {
S.Diag(AwaitReady->getDirectCallee()->getLocStart(),
diag::note_await_ready_no_bool_conversion);
S.Diag(Loc, diag::note_coroutine_promise_call_implicitly_required)
<< AwaitReady->getDirectCallee() << E->getSourceRange();
Calls.IsInvalid = true;
}
Calls.Results[ACT::ACT_Ready] = Conv.get();
}
CallExpr *AwaitSuspend = cast<CallExpr>(Calls.Results[ACT::ACT_Suspend]);
if (!AwaitSuspend->getType()->isDependentType()) {
// [expr.await]p3 [...]
// - await-suspend is the expression e.await_suspend(h), which shall be
// a prvalue of type void or bool.
QualType RetType = AwaitSuspend->getType();
if (RetType != S.Context.BoolTy && RetType != S.Context.VoidTy) {
S.Diag(AwaitSuspend->getCalleeDecl()->getLocation(),
diag::err_await_suspend_invalid_return_type)
<< RetType;
S.Diag(Loc, diag::note_coroutine_promise_call_implicitly_required)
<< AwaitSuspend->getDirectCallee();
Calls.IsInvalid = true;
}
}
return Calls;
}
void ImplicitCasts::VisitStmt(clang::Stmt *stmt)
{
if (isMacroToIgnore(stmt->getLocStart()))
return;
// Lets check only in function calls. Otherwise there are too many false positives, it's common
// to implicit cast to bool when checking pointers for validity, like if (ptr)
CallExpr *callExpr = dyn_cast<CallExpr>(stmt);
CXXConstructExpr *ctorExpr = dyn_cast<CXXConstructExpr>(stmt);
if (!callExpr && !ctorExpr)
return;
FunctionDecl *func = callExpr ? callExpr->getDirectCallee()
: ctorExpr->getConstructor();
if (isInterestingFunction(func)) {
// Check pointer->bool implicit casts
iterateCallExpr<CallExpr>(callExpr, this);
iterateCallExpr<CXXConstructExpr>(ctorExpr, this);
} else if (isInterestingFunction2(func)) {
// Check bool->int implicit casts
iterateCallExpr2<CallExpr>(callExpr, this, m_parentMap);
iterateCallExpr2<CXXConstructExpr>(ctorExpr, this, m_parentMap);
}
}
void QGetEnv::VisitStmt(clang::Stmt *stmt)
{
// Lets check only in function calls. Otherwise there are too many false positives, it's common
// to implicit cast to bool when checking pointers for validity, like if (ptr)
CXXMemberCallExpr *memberCall = dyn_cast<CXXMemberCallExpr>(stmt);
if (!memberCall)
return;
CXXMethodDecl *method = memberCall->getMethodDecl();
if (!method)
return;
CXXRecordDecl *record = method->getParent();
if (!record || record->getNameAsString() != "QByteArray") {
return;
}
std::vector<CallExpr *> calls = Utils::callListForChain(memberCall);
if (calls.size() != 2)
return;
CallExpr *qgetEnvCall = calls.back();
FunctionDecl *func = qgetEnvCall->getDirectCallee();
if (!func || func->getNameAsString() != "qgetenv")
return;
string methodname = method->getNameAsString();
string errorMsg;
std::string replacement;
if (methodname == "isEmpty") {
errorMsg = "qgetenv().isEmpty() allocates.";
replacement = "qEnvironmentVariableIsEmpty";
} else if (methodname == "isNull") {
errorMsg = "qgetenv().isNull() allocates.";
replacement = "qEnvironmentVariableIsSet";
} else if (methodname == "toInt") {
errorMsg = "qgetenv().toInt() is slow.";
replacement = "qEnvironmentVariableIntValue";
}
if (!errorMsg.empty()) {
std::vector<FixItHint> fixits;
if (isFixitEnabled(FixitAll)) {
const bool success = FixItUtils::transformTwoCallsIntoOne(m_ci, qgetEnvCall, memberCall, replacement, fixits);
if (!success) {
queueManualFixitWarning(memberCall->getLocStart(), FixitAll);
}
}
errorMsg += " Use " + replacement + "() instead";
emitWarning(memberCall->getLocStart(), errorMsg.c_str(), fixits);
}
}
void Inliner::VisitBinaryOperator(BinaryOperator * node) {
Expr * lhs = node->getLHS(), * rhs = node->getRHS();
CallExpr * call = dyn_cast<CallExpr>(rhs);
if (call && call->getDirectCallee()->isThisDeclarationADefinition()) { // replace: x = foo(y); with: /*x = */ { //inlined foo }
Rewriter &rewriter = (current_func_->isMain()) ? main_rewriter_ : rewriter_;
rewriter.InsertText(lhs->getLocStart(),"/*");
rewriter.InsertText(rhs->getLocStart(),"*/");
}
return_vars_.push_back(Utils::PrintStmt(lhs,contex_));
VisitChildren(node);
return_vars_.pop_back();
}
void QStringAllocations::VisitFromLatin1OrUtf8(Stmt *stmt)
{
CallExpr *callExpr = dyn_cast<CallExpr>(stmt);
if (!callExpr)
return;
FunctionDecl *functionDecl = callExpr->getDirectCallee();
if (!StringUtils::functionIsOneOf(functionDecl, {"fromLatin1", "fromUtf8"}))
return;
CXXMethodDecl *methodDecl = dyn_cast<CXXMethodDecl>(functionDecl);
if (!StringUtils::isOfClass(methodDecl, "QString"))
return;
if (!Utils::callHasDefaultArguments(callExpr) || !hasCharPtrArgument(functionDecl, 2)) // QString::fromLatin1("foo", 1) is ok
return;
if (!containsStringLiteralNoCallExpr(callExpr))
return;
if (!isOptionSet("no-msvc-compat")) {
StringLiteral *lt = stringLiteralForCall(callExpr);
if (lt && lt->getNumConcatenated() > 1) {
return; // Nothing to do here, MSVC doesn't like it
}
}
vector<ConditionalOperator*> ternaries;
HierarchyUtils::getChilds(callExpr, ternaries, 2);
if (!ternaries.empty()) {
auto ternary = ternaries[0];
if (Utils::ternaryOperatorIsOfStringLiteral(ternary)) {
emitWarning(stmt->getLocStart(), string("QString::fromLatin1() being passed a literal"));
}
return;
}
std::vector<FixItHint> fixits;
if (isFixitEnabled(FromLatin1_FromUtf8Allocations)) {
const FromFunction fromFunction = functionDecl->getNameAsString() == "fromLatin1" ? FromLatin1 : FromUtf8;
fixits = fixItReplaceFromLatin1OrFromUtf8(callExpr, fromFunction);
}
if (functionDecl->getNameAsString() == "fromLatin1") {
emitWarning(stmt->getLocStart(), string("QString::fromLatin1() being passed a literal"), fixits);
} else {
emitWarning(stmt->getLocStart(), string("QString::fromUtf8() being passed a literal"), fixits);
}
}
// true for: QString::fromLatin1().arg()
// false for: QString::fromLatin1("")
// true for: QString s = QString::fromLatin1("foo")
// false for: s += QString::fromLatin1("foo"), etc.
static bool isQStringLiteralCandidate(Stmt *s, ParentMap *map, const LangOptions &lo,
const SourceManager &sm , int currentCall = 0)
{
if (!s)
return false;
MemberExpr *memberExpr = dyn_cast<MemberExpr>(s);
if (memberExpr)
return true;
auto constructExpr = dyn_cast<CXXConstructExpr>(s);
if (StringUtils::isOfClass(constructExpr, "QString"))
return true;
if (Utils::isAssignOperator(dyn_cast<CXXOperatorCallExpr>(s), "QString", "QLatin1String", lo))
return true;
if (Utils::isAssignOperator(dyn_cast<CXXOperatorCallExpr>(s), "QString", "QString", lo))
return true;
CallExpr *callExpr = dyn_cast<CallExpr>(s);
StringLiteral *literal = stringLiteralForCall(callExpr);
auto operatorCall = dyn_cast<CXXOperatorCallExpr>(s);
if (operatorCall && StringUtils::returnTypeName(operatorCall, lo) != "QTestData") {
// QTest::newRow will static_assert when using QLatin1String
// Q_STATIC_ASSERT_X(QMetaTypeId2<T>::Defined, "Type is not registered, please use the Q_DECLARE_METATYPE macro to make it known to Qt's meta-object system");
string className = StringUtils::classNameFor(operatorCall);
if (className == "QString") {
return false;
} else if (className.empty() && StringUtils::hasArgumentOfType(operatorCall->getDirectCallee(), "QString", lo)) {
return false;
}
}
if (currentCall > 0 && callExpr) {
auto fDecl = callExpr->getDirectCallee();
if (fDecl && betterTakeQLatin1String(dyn_cast<CXXMethodDecl>(fDecl), literal))
return false;
return true;
}
if (currentCall == 0 || dyn_cast<ImplicitCastExpr>(s) || dyn_cast<CXXBindTemporaryExpr>(s) || dyn_cast<MaterializeTemporaryExpr>(s)) // skip this cruft
return isQStringLiteralCandidate(HierarchyUtils::parent(map, s), map, lo, sm, currentCall + 1);
return false;
}
// Deal with all the call expr in the transaction.
bool VisitCallExpr(CallExpr* TheCall) {
if (FunctionDecl* FDecl = TheCall->getDirectCallee()) {
std::bitset<32> ArgIndexs;
for (FunctionDecl::redecl_iterator RI = FDecl->redecls_begin(),
RE = FDecl->redecls_end(); RI != RE; ++RI) {
for (specific_attr_iterator<NonNullAttr>
I = RI->specific_attr_begin<NonNullAttr>(),
E = RI->specific_attr_end<NonNullAttr>(); I != E; ++I) {
NonNullAttr *NonNull = *I;
// Store all the null attr argument's index into "ArgIndexs".
for (NonNullAttr::args_iterator i = NonNull->args_begin(),
e = NonNull->args_end(); i != e; ++i) {
// Get the argument with the nonnull attribute.
const Expr* Arg = TheCall->getArg(*i);
// Check whether we can get the argument'value. If the argument is
// not null, then ignore this argument and continue to deal with the
// next argument with the nonnull attribute.ArgIndexs.set(*i);
bool Result;
ASTContext& Context = m_Sema->getASTContext();
if (Arg->EvaluateAsBooleanCondition(Result, Context) && Result) {
continue;
}
ArgIndexs.set(*i);
}
break;
}
}
if (ArgIndexs.any()) {
// Get the function decl's name.
std::string FName = getMangledName(FDecl);
// Store the function decl's name into the vector.
m_NonNullDeclNames.push_back(FName);
// Store the function decl's name with its null attr args' indexes
// into the map.
m_NonNullArgIndexs.insert(std::make_pair(FName, ArgIndexs));
}
// FIXME: For now we will only work/check on declarations that are not
// deserialized. We want to avoid our null deref transaformer to
// deserialize all the contents of a PCH/PCM.
// We have to think of a better way to find the annotated
// declarations, without that to cause too much deserialization.
Stmt* S = (FDecl->isFromASTFile()) ? 0 : FDecl->getBody();
if (S) {
for (Stmt::child_iterator II = S->child_begin(), EE = S->child_end();
II != EE; ++II) {
CallExpr* child = dyn_cast<CallExpr>(*II);
if (child && child->getDirectCallee() != FDecl)
VisitCallExpr(child);
}
}
}
return true; // returning false will abort the in-depth traversal.
}
/*
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;
}
}
}
}
