static bool pointedUnqualifiedTypesAreEqual(QualType T1, QualType T2) {
while ((T1->isPointerType() && T2->isPointerType()) ||
(T1->isReferenceType() && T2->isReferenceType())) {
T1 = T1->getPointeeType();
T2 = T2->getPointeeType();
}
return T1.getUnqualifiedType() == T2.getUnqualifiedType();
}
static bool needsConstCast(QualType SourceType, QualType DestType) {
while ((SourceType->isPointerType() && DestType->isPointerType()) ||
(SourceType->isReferenceType() && DestType->isReferenceType())) {
SourceType = SourceType->getPointeeType();
DestType = DestType->getPointeeType();
if (SourceType.isConstQualified() && !DestType.isConstQualified()) {
return (SourceType->isPointerType() == DestType->isPointerType()) &&
(SourceType->isReferenceType() == DestType->isReferenceType());
}
}
return false;
}
long long clang_Type_getSizeOf(CXType T) {
if (T.kind == CXType_Invalid)
return CXTypeLayoutError_Invalid;
ASTContext &Ctx = cxtu::getASTUnit(GetTU(T))->getASTContext();
QualType QT = GetQualType(T);
// [expr.sizeof] p2: if reference type, return size of referenced type
if (QT->isReferenceType())
QT = QT.getNonReferenceType();
// [expr.sizeof] p1: return -1 on: func, incomplete, bitfield, incomplete
// enumeration
// Note: We get the cxtype, not the cxcursor, so we can't call
// FieldDecl->isBitField()
// [expr.sizeof] p3: pointer ok, function not ok.
// [gcc extension] lib/AST/ExprConstant.cpp:1372 HandleSizeof : vla == error
if (QT->isIncompleteType())
return CXTypeLayoutError_Incomplete;
if (QT->isDependentType())
return CXTypeLayoutError_Dependent;
if (!QT->isConstantSizeType())
return CXTypeLayoutError_NotConstantSize;
// [gcc extension] lib/AST/ExprConstant.cpp:1372
// HandleSizeof : {voidtype,functype} == 1
// not handled by ASTContext.cpp:1313 getTypeInfoImpl
if (QT->isVoidType() || QT->isFunctionType())
return 1;
return Ctx.getTypeSizeInChars(QT).getQuantity();
}
void ReturnUndefChecker::checkPreStmt(const ReturnStmt *RS,
CheckerContext &C) const {
const Expr *RetE = RS->getRetValue();
if (!RetE)
return;
SVal RetVal = C.getSVal(RetE);
const StackFrameContext *SFC = C.getStackFrame();
QualType RT = CallEvent::getDeclaredResultType(SFC->getDecl());
if (RetVal.isUndef()) {
// "return;" is modeled to evaluate to an UndefinedVal. Allow UndefinedVal
// to be returned in functions returning void to support this pattern:
// void foo() {
// return;
// }
// void test() {
// return foo();
// }
if (RT.isNull() || !RT->isVoidType())
emitUndef(C, RetE);
return;
}
if (RT.isNull())
return;
if (RT->isReferenceType()) {
checkReference(C, RetE, RetVal.castAs<DefinedOrUnknownSVal>());
return;
}
}
void CodeGenFunction::EmitCXXGlobalVarDeclInit(const VarDecl &D,
llvm::Constant *DeclPtr,
bool PerformInit) {
const Expr *Init = D.getInit();
QualType T = D.getType();
if (!T->isReferenceType()) {
if (getLangOpts().OpenMP && D.hasAttr<OMPThreadPrivateDeclAttr>())
(void)CGM.getOpenMPRuntime().EmitOMPThreadPrivateVarDefinition(
&D, DeclPtr, D.getAttr<OMPThreadPrivateDeclAttr>()->getLocation(),
PerformInit, this);
if (PerformInit)
EmitDeclInit(*this, D, DeclPtr);
if (CGM.isTypeConstant(D.getType(), true))
EmitDeclInvariant(*this, D, DeclPtr);
else
EmitDeclDestroy(*this, D, DeclPtr);
return;
}
assert(PerformInit && "cannot have constant initializer which needs "
"destruction for reference");
unsigned Alignment = getContext().getDeclAlign(&D).getQuantity();
RValue RV = EmitReferenceBindingToExpr(Init);
EmitStoreOfScalar(RV.getScalarVal(), DeclPtr, false, Alignment, T);
}
SVal GRSimpleVals::EvalCast(GRExprEngine& Eng, Loc X, QualType T) {
// Casts from pointers -> pointers, just return the lval.
//
// Casts from pointers -> references, just return the lval. These
// can be introduced by the frontend for corner cases, e.g
// casting from va_list* to __builtin_va_list&.
//
assert (!X.isUnknownOrUndef());
if (Loc::IsLocType(T) || T->isReferenceType())
return X;
// FIXME: Handle transparent unions where a value can be "transparently"
// lifted into a union type.
if (T->isUnionType())
return UnknownVal();
assert (T->isIntegerType());
BasicValueFactory& BasicVals = Eng.getBasicVals();
unsigned BitWidth = Eng.getContext().getTypeSize(T);
if (!isa<loc::ConcreteInt>(X))
return nonloc::LocAsInteger::Make(BasicVals, X, BitWidth);
llvm::APSInt V = cast<loc::ConcreteInt>(X).getValue();
V.setIsUnsigned(T->isUnsignedIntegerType() || Loc::IsLocType(T));
V.extOrTrunc(BitWidth);
return nonloc::ConcreteInt(BasicVals.getValue(V));
}
void InnerPointerChecker::checkFunctionArguments(const CallEvent &Call,
ProgramStateRef State,
CheckerContext &C) const {
if (const auto *FC = dyn_cast<AnyFunctionCall>(&Call)) {
const FunctionDecl *FD = FC->getDecl();
if (!FD || !FD->isInStdNamespace())
return;
for (unsigned I = 0, E = FD->getNumParams(); I != E; ++I) {
QualType ParamTy = FD->getParamDecl(I)->getType();
if (!ParamTy->isReferenceType() ||
ParamTy->getPointeeType().isConstQualified())
continue;
// In case of member operator calls, `this` is counted as an
// argument but not as a parameter.
bool isaMemberOpCall = isa<CXXMemberOperatorCall>(FC);
unsigned ArgI = isaMemberOpCall ? I+1 : I;
SVal Arg = FC->getArgSVal(ArgI);
const auto *ArgRegion =
dyn_cast_or_null<TypedValueRegion>(Arg.getAsRegion());
if (!ArgRegion)
continue;
markPtrSymbolsReleased(Call, State, ArgRegion, C);
}
}
}
void CallAndMessageChecker::emitNilReceiverBug(CheckerContext &C,
const ObjCMethodCall &msg,
ExplodedNode *N) const {
if (!BT_msg_ret)
BT_msg_ret.reset(
new BuiltinBug(this, "Receiver in message expression is 'nil'"));
const ObjCMessageExpr *ME = msg.getOriginExpr();
QualType ResTy = msg.getResultType();
SmallString<200> buf;
llvm::raw_svector_ostream os(buf);
os << "The receiver of message '";
ME->getSelector().print(os);
os << "' is nil";
if (ResTy->isReferenceType()) {
os << ", which results in forming a null reference";
} else {
os << " and returns a value of type '";
msg.getResultType().print(os, C.getLangOpts());
os << "' that will be garbage";
}
auto report = llvm::make_unique<BugReport>(*BT_msg_ret, os.str(), N);
report->addRange(ME->getReceiverRange());
// FIXME: This won't track "self" in messages to super.
if (const Expr *receiver = ME->getInstanceReceiver()) {
bugreporter::trackNullOrUndefValue(N, receiver, *report);
}
C.emitReport(std::move(report));
}
void
AggExprEmitter::EmitInitializationToLValue(Expr* E, LValue LV) {
QualType type = LV.getType();
// FIXME: Ignore result?
// FIXME: Are initializers affected by volatile?
if (Dest.isZeroed() && isSimpleZero(E, CGF)) {
// Storing "i32 0" to a zero'd memory location is a noop.
} else if (isa<ImplicitValueInitExpr>(E)) {
EmitNullInitializationToLValue(LV);
} else if (type->isReferenceType()) {
RValue RV = CGF.EmitReferenceBindingToExpr(E, /*InitializedDecl=*/0);
CGF.EmitStoreThroughLValue(RV, LV);
} else if (type->isAnyComplexType()) {
CGF.EmitComplexExprIntoAddr(E, LV.getAddress(), false);
} else if (CGF.hasAggregateLLVMType(type)) {
CGF.EmitAggExpr(E, AggValueSlot::forLValue(LV,
AggValueSlot::IsDestructed,
AggValueSlot::DoesNotNeedGCBarriers,
AggValueSlot::IsNotAliased,
Dest.isZeroed()));
} else if (LV.isSimple()) {
CGF.EmitScalarInit(E, /*D=*/0, LV, /*Captured=*/false);
} else {
CGF.EmitStoreThroughLValue(RValue::get(CGF.EmitScalarExpr(E)), LV);
}
}
static bool isCallbackArg(SVal V, QualType T) {
// If the parameter is 0, it's harmless.
if (V.isZeroConstant())
return false;
// If a parameter is a block or a callback, assume it can modify pointer.
if (T->isBlockPointerType() ||
T->isFunctionPointerType() ||
T->isObjCSelType())
return true;
// Check if a callback is passed inside a struct (for both, struct passed by
// reference and by value). Dig just one level into the struct for now.
if (T->isAnyPointerType() || T->isReferenceType())
T = T->getPointeeType();
if (const RecordType *RT = T->getAsStructureType()) {
const RecordDecl *RD = RT->getDecl();
for (RecordDecl::field_iterator I = RD->field_begin(), E = RD->field_end();
I != E; ++I) {
QualType FieldT = I->getType();
if (FieldT->isBlockPointerType() || FieldT->isFunctionPointerType())
return true;
}
}
return false;
}
/// CheckAllocatedType - Checks that a type is suitable as the allocated type
/// in a new-expression.
/// dimension off and stores the size expression in ArraySize.
bool Sema::CheckAllocatedType(QualType AllocType, const Declarator &D)
{
// C++ 5.3.4p1: "[The] type shall be a complete object type, but not an
// abstract class type or array thereof.
if (AllocType->isFunctionType())
return Diag(D.getSourceRange().getBegin(), diag::err_bad_new_type)
<< AllocType << 0 << D.getSourceRange();
else if (AllocType->isReferenceType())
return Diag(D.getSourceRange().getBegin(), diag::err_bad_new_type)
<< AllocType << 1 << D.getSourceRange();
else if (!AllocType->isDependentType() &&
RequireCompleteType(D.getSourceRange().getBegin(), AllocType,
diag::err_new_incomplete_type,
D.getSourceRange()))
return true;
else if (RequireNonAbstractType(D.getSourceRange().getBegin(), AllocType,
diag::err_allocation_of_abstract_type))
return true;
// Every dimension shall be of constant size.
unsigned i = 1;
while (const ArrayType *Array = Context.getAsArrayType(AllocType)) {
if (!Array->isConstantArrayType()) {
Diag(D.getTypeObject(i).Loc, diag::err_new_array_nonconst)
<< static_cast<Expr*>(D.getTypeObject(i).Arr.NumElts)->getSourceRange();
return true;
}
AllocType = Array->getElementType();
++i;
}
return false;
}
SVal SimpleSValBuilder::evalCastFromLoc(Loc val, QualType castTy) {
// Casts from pointers -> pointers, just return the lval.
//
// Casts from pointers -> references, just return the lval. These
// can be introduced by the frontend for corner cases, e.g
// casting from va_list* to __builtin_va_list&.
//
if (Loc::isLocType(castTy) || castTy->isReferenceType())
return val;
// FIXME: Handle transparent unions where a value can be "transparently"
// lifted into a union type.
if (castTy->isUnionType())
return UnknownVal();
if (castTy->isIntegerType()) {
unsigned BitWidth = Context.getTypeSize(castTy);
if (!isa<loc::ConcreteInt>(val))
return makeLocAsInteger(val, BitWidth);
llvm::APSInt i = cast<loc::ConcreteInt>(val).getValue();
BasicVals.getAPSIntType(castTy).apply(i);
return makeIntVal(i);
}
// All other cases: return 'UnknownVal'. This includes casting pointers
// to floats, which is probably badness it itself, but this is a good
// intermediate solution until we do something better.
return UnknownVal();
}
RangeSet RangeConstraintManager::getRange(ProgramStateRef State,
SymbolRef Sym) {
if (ConstraintRangeTy::data_type *V = State->get<ConstraintRange>(Sym))
return *V;
BasicValueFactory &BV = getBasicVals();
// If Sym is a difference of symbols A - B, then maybe we have range set
// stored for B - A.
if (const RangeSet *R = getRangeForMinusSymbol(State, Sym))
return R->Negate(BV, F);
// Lazily generate a new RangeSet representing all possible values for the
// given symbol type.
QualType T = Sym->getType();
RangeSet Result(F, BV.getMinValue(T), BV.getMaxValue(T));
// References are known to be non-zero.
if (T->isReferenceType())
return assumeNonZero(BV, F, Sym, Result);
// Known constraints on ranges of bitwise expressions.
if (const SymIntExpr* SIE = dyn_cast<SymIntExpr>(Sym))
return applyBitwiseConstraints(BV, F, Result, SIE);
return Result;
}
SVal SimpleSValBuilder::evalCastFromLoc(Loc val, QualType castTy) {
// Casts from pointers -> pointers, just return the lval.
//
// Casts from pointers -> references, just return the lval. These
// can be introduced by the frontend for corner cases, e.g
// casting from va_list* to __builtin_va_list&.
//
if (Loc::isLocType(castTy) || castTy->isReferenceType())
return val;
// FIXME: Handle transparent unions where a value can be "transparently"
// lifted into a union type.
if (castTy->isUnionType())
return UnknownVal();
// Casting a Loc to a bool will almost always be true,
// unless this is a weak function or a symbolic region.
if (castTy->isBooleanType()) {
switch (val.getSubKind()) {
case loc::MemRegionValKind: {
const MemRegion *R = val.castAs<loc::MemRegionVal>().getRegion();
if (const FunctionCodeRegion *FTR = dyn_cast<FunctionCodeRegion>(R))
if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(FTR->getDecl()))
if (FD->isWeak())
// FIXME: Currently we are using an extent symbol here,
// because there are no generic region address metadata
// symbols to use, only content metadata.
return nonloc::SymbolVal(SymMgr.getExtentSymbol(FTR));
if (const SymbolicRegion *SymR = R->getSymbolicBase())
return nonloc::SymbolVal(SymR->getSymbol());
// FALL-THROUGH
LLVM_FALLTHROUGH;
}
case loc::GotoLabelKind:
// Labels and non-symbolic memory regions are always true.
return makeTruthVal(true, castTy);
}
}
if (castTy->isIntegralOrEnumerationType()) {
unsigned BitWidth = Context.getTypeSize(castTy);
if (!val.getAs<loc::ConcreteInt>())
return makeLocAsInteger(val, BitWidth);
llvm::APSInt i = val.castAs<loc::ConcreteInt>().getValue();
BasicVals.getAPSIntType(castTy).apply(i);
return makeIntVal(i);
}
// All other cases: return 'UnknownVal'. This includes casting pointers
// to floats, which is probably badness it itself, but this is a good
// intermediate solution until we do something better.
return UnknownVal();
}
static bool isPointerToConst(const ParmVarDecl *ParamDecl) {
QualType PointeeTy = ParamDecl->getOriginalType()->getPointeeType();
if (PointeeTy != QualType() && PointeeTy.isConstQualified() &&
!PointeeTy->isAnyPointerType() && !PointeeTy->isReferenceType()) {
return true;
}
return false;
}
void CodeGenFunction::EmitCXXGlobalVarDeclInit(const VarDecl &D,
llvm::Constant *DeclPtr,
bool PerformInit) {
const Expr *Init = D.getInit();
QualType T = D.getType();
// The address space of a static local variable (DeclPtr) may be different
// from the address space of the "this" argument of the constructor. In that
// case, we need an addrspacecast before calling the constructor.
//
// struct StructWithCtor {
// __device__ StructWithCtor() {...}
// };
// __device__ void foo() {
// __shared__ StructWithCtor s;
// ...
// }
//
// For example, in the above CUDA code, the static local variable s has a
// "shared" address space qualifier, but the constructor of StructWithCtor
// expects "this" in the "generic" address space.
unsigned ExpectedAddrSpace = getContext().getTargetAddressSpace(T);
unsigned ActualAddrSpace = DeclPtr->getType()->getPointerAddressSpace();
if (ActualAddrSpace != ExpectedAddrSpace) {
llvm::Type *LTy = CGM.getTypes().ConvertTypeForMem(T);
llvm::PointerType *PTy = llvm::PointerType::get(LTy, ExpectedAddrSpace);
DeclPtr = llvm::ConstantExpr::getAddrSpaceCast(DeclPtr, PTy);
}
ConstantAddress DeclAddr(DeclPtr, getContext().getDeclAlign(&D));
if (!T->isReferenceType()) {
if (getLangOpts().OpenMP && !getLangOpts().OpenMPSimd &&
D.hasAttr<OMPThreadPrivateDeclAttr>()) {
(void)CGM.getOpenMPRuntime().emitThreadPrivateVarDefinition(
&D, DeclAddr, D.getAttr<OMPThreadPrivateDeclAttr>()->getLocation(),
PerformInit, this);
}
if (PerformInit)
EmitDeclInit(*this, D, DeclAddr);
if (CGM.isTypeConstant(D.getType(), true))
EmitDeclInvariant(*this, D, DeclPtr);
else
EmitDeclDestroy(*this, D, DeclAddr);
return;
}
assert(PerformInit && "cannot have constant initializer which needs "
"destruction for reference");
RValue RV = EmitReferenceBindingToExpr(Init);
EmitStoreOfScalar(RV.getScalarVal(), DeclAddr, false, T);
}
PathDiagnosticPiece *
UndefOrNullArgVisitor::VisitNode(const ExplodedNode *N,
const ExplodedNode *PrevN,
BugReporterContext &BRC,
BugReport &BR) {
ProgramStateRef State = N->getState();
ProgramPoint ProgLoc = N->getLocation();
// We are only interested in visiting CallEnter nodes.
Optional<CallEnter> CEnter = ProgLoc.getAs<CallEnter>();
if (!CEnter)
return 0;
// Check if one of the arguments is the region the visitor is tracking.
CallEventManager &CEMgr = BRC.getStateManager().getCallEventManager();
CallEventRef<> Call = CEMgr.getCaller(CEnter->getCalleeContext(), State);
unsigned Idx = 0;
for (CallEvent::param_iterator I = Call->param_begin(),
E = Call->param_end(); I != E; ++I, ++Idx) {
const MemRegion *ArgReg = Call->getArgSVal(Idx).getAsRegion();
// Are we tracking the argument or its subregion?
if ( !ArgReg || (ArgReg != R && !R->isSubRegionOf(ArgReg->StripCasts())))
continue;
// Check the function parameter type.
const ParmVarDecl *ParamDecl = *I;
assert(ParamDecl && "Formal parameter has no decl?");
QualType T = ParamDecl->getType();
if (!(T->isAnyPointerType() || T->isReferenceType())) {
// Function can only change the value passed in by address.
continue;
}
// If it is a const pointer value, the function does not intend to
// change the value.
if (T->getPointeeType().isConstQualified())
continue;
// Mark the call site (LocationContext) as interesting if the value of the
// argument is undefined or '0'/'NULL'.
SVal BoundVal = State->getSVal(R);
if (BoundVal.isUndef() || BoundVal.isZeroConstant()) {
BR.markInteresting(CEnter->getCalleeContext());
return 0;
}
}
return 0;
}
void AggExprEmitter::VisitBinAssign(const BinaryOperator *E) {
// For an assignment to work, the value on the right has
// to be compatible with the value on the left.
assert(CGF.getContext().hasSameUnqualifiedType(E->getLHS()->getType(),
E->getRHS()->getType())
&& "Invalid assignment");
if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E->getLHS()))
if (const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl()))
if (VD->hasAttr<BlocksAttr>() &&
E->getRHS()->HasSideEffects(CGF.getContext())) {
// When __block variable on LHS, the RHS must be evaluated first
// as it may change the 'forwarding' field via call to Block_copy.
LValue RHS = CGF.EmitLValue(E->getRHS());
LValue LHS = CGF.EmitLValue(E->getLHS());
bool GCollection = false;
if (CGF.getContext().getLangOptions().getGCMode())
GCollection = TypeRequiresGCollection(E->getLHS()->getType());
Dest = AggValueSlot::forLValue(LHS, true, GCollection);
EmitFinalDestCopy(E, RHS, true);
return;
}
LValue LHS = CGF.EmitLValue(E->getLHS());
// We have to special case property setters, otherwise we must have
// a simple lvalue (no aggregates inside vectors, bitfields).
if (LHS.isPropertyRef()) {
const ObjCPropertyRefExpr *RE = LHS.getPropertyRefExpr();
QualType ArgType = RE->getSetterArgType();
RValue Src;
if (ArgType->isReferenceType())
Src = CGF.EmitReferenceBindingToExpr(E->getRHS(), 0);
else {
AggValueSlot Slot = EnsureSlot(E->getRHS()->getType());
CGF.EmitAggExpr(E->getRHS(), Slot);
Src = Slot.asRValue();
}
CGF.EmitStoreThroughPropertyRefLValue(Src, LHS);
} else {
bool GCollection = false;
if (CGF.getContext().getLangOptions().getGCMode())
GCollection = TypeRequiresGCollection(E->getLHS()->getType());
// Codegen the RHS so that it stores directly into the LHS.
AggValueSlot LHSSlot = AggValueSlot::forLValue(LHS, true,
GCollection);
CGF.EmitAggExpr(E->getRHS(), LHSSlot, false);
EmitFinalDestCopy(E, LHS, true);
}
}
void CodeGenFunction::EmitCXXGlobalVarDeclInit(const VarDecl &D,
llvm::Constant *DeclPtr) {
const Expr *Init = D.getInit();
QualType T = D.getType();
if (!T->isReferenceType()) {
EmitDeclInit(*this, D, DeclPtr);
EmitDeclDestroy(*this, D, DeclPtr);
return;
}
RValue RV = EmitReferenceBindingToExpr(Init, &D);
EmitStoreOfScalar(RV.getScalarVal(), DeclPtr, false, T);
}
/// Check if the given type is a valid base type to be used in access tags.
static bool isValidBaseType(QualType QTy) {
if (QTy->isReferenceType())
return false;
if (const RecordType *TTy = QTy->getAs<RecordType>()) {
const RecordDecl *RD = TTy->getDecl()->getDefinition();
// Incomplete types are not valid base access types.
if (!RD)
return false;
if (RD->hasFlexibleArrayMember())
return false;
// RD can be struct, union, class, interface or enum.
// For now, we only handle struct and class.
if (RD->isStruct() || RD->isClass())
return true;
}
return false;
}
void
AggExprEmitter::EmitInitializationToLValue(Expr* E, LValue LV, QualType T) {
// FIXME: Ignore result?
// FIXME: Are initializers affected by volatile?
if (isa<ImplicitValueInitExpr>(E)) {
EmitNullInitializationToLValue(LV, T);
} else if (T->isReferenceType()) {
RValue RV = CGF.EmitReferenceBindingToExpr(E, /*InitializedDecl=*/0);
CGF.EmitStoreThroughLValue(RV, LV, T);
} else if (T->isAnyComplexType()) {
CGF.EmitComplexExprIntoAddr(E, LV.getAddress(), false);
} else if (CGF.hasAggregateLLVMType(T)) {
CGF.EmitAnyExpr(E, LV.getAddress(), false);
} else {
CGF.EmitStoreThroughLValue(CGF.EmitAnyExpr(E), LV, T);
}
}
void edmChecker::checkASTDecl(const clang::CXXRecordDecl *RD, clang::ento::AnalysisManager& mgr,
clang::ento::BugReporter &BR) const {
const clang::SourceManager &SM = BR.getSourceManager();
clang::ento::PathDiagnosticLocation DLoc =clang::ento::PathDiagnosticLocation::createBegin( RD, SM );
if ( !m_exception.reportClass( DLoc, BR ) ) return;
// Check the class methods (member methods).
for (clang::CXXRecordDecl::method_iterator
I = RD->method_begin(), E = RD->method_end(); I != E; ++I)
{
if ( !llvm::isa<clang::CXXMethodDecl>((*I)) ) continue;
clang::CXXMethodDecl * MD = llvm::cast<clang::CXXMethodDecl>((*I));
if ( MD->getNameAsString() == "beginRun"
|| MD->getNameAsString() == "endRun"
|| MD->getNameAsString() == "beginLuminosityBlock"
|| MD->getNameAsString() == "endLuminosityBlock" )
{
// llvm::errs()<<MD->getQualifiedNameAsString()<<"\n";
for (auto J=RD->bases_begin(), F=RD->bases_end();J != F; ++J)
{
std::string name = J->getType()->castAs<RecordType>()->getDecl()->getQualifiedNameAsString();
// llvm::errs()<<RD->getQualifiedNameAsString()<<"\n";
// llvm::errs() << "inherits from " <<name<<"\n";
if (name=="edm::EDProducer" || name=="edm::EDFilter")
{
llvm::SmallString<100> buf;
llvm::raw_svector_ostream os(buf);
os << RD->getQualifiedNameAsString() << " inherits from edm::EDProducer or edm::EDFilter";
os << "\n";
llvm::errs()<<os.str();
CXXMethodDecl::param_iterator I = MD->param_begin();
ParmVarDecl * PVD = *(I);
QualType PQT = PVD->getType();
if ( PQT->isReferenceType() ) {
QualType RQT = PQT->getPointeeType();
if (RQT.isConstQualified()) continue;
}
clang::ento::PathDiagnosticLocation ELoc =clang::ento::PathDiagnosticLocation::createBegin( MD, SM );
clang::SourceLocation SL = MD->getLocStart();
BR.EmitBasicReport(MD, "Class Checker : inherits from edm::EDProducer or edm::EDFilter","optional",os.str(),ELoc,SL);
}
}
}
}
} //end of class
void CodeGenFunction::EmitCXXGlobalVarDeclInit(const VarDecl &D,
llvm::Constant *DeclPtr) {
const Expr *Init = D.getInit();
QualType T = D.getType();
if (!T->isReferenceType()) {
EmitDeclInit(*this, D, DeclPtr);
return;
}
if (Init->isLvalue(getContext()) == Expr::LV_Valid) {
RValue RV = EmitReferenceBindingToExpr(Init, /*IsInitializer=*/true);
EmitStoreOfScalar(RV.getScalarVal(), DeclPtr, false, T);
return;
}
ErrorUnsupported(Init,
"global variable that binds reference to a non-lvalue");
}
static RValue PerformReturnAdjustment(CodeGenFunction &CGF,
QualType ResultType, RValue RV,
const ThunkInfo &Thunk) {
// Emit the return adjustment.
bool NullCheckValue = !ResultType->isReferenceType();
llvm::BasicBlock *AdjustNull = nullptr;
llvm::BasicBlock *AdjustNotNull = nullptr;
llvm::BasicBlock *AdjustEnd = nullptr;
llvm::Value *ReturnValue = RV.getScalarVal();
if (NullCheckValue) {
AdjustNull = CGF.createBasicBlock("adjust.null");
AdjustNotNull = CGF.createBasicBlock("adjust.notnull");
AdjustEnd = CGF.createBasicBlock("adjust.end");
llvm::Value *IsNull = CGF.Builder.CreateIsNull(ReturnValue);
CGF.Builder.CreateCondBr(IsNull, AdjustNull, AdjustNotNull);
CGF.EmitBlock(AdjustNotNull);
}
auto ClassDecl = ResultType->getPointeeType()->getAsCXXRecordDecl();
auto ClassAlign = CGF.CGM.getClassPointerAlignment(ClassDecl);
ReturnValue = CGF.CGM.getCXXABI().performReturnAdjustment(CGF,
Address(ReturnValue, ClassAlign),
Thunk.Return);
if (NullCheckValue) {
CGF.Builder.CreateBr(AdjustEnd);
CGF.EmitBlock(AdjustNull);
CGF.Builder.CreateBr(AdjustEnd);
CGF.EmitBlock(AdjustEnd);
llvm::PHINode *PHI = CGF.Builder.CreatePHI(ReturnValue->getType(), 2);
PHI->addIncoming(ReturnValue, AdjustNotNull);
PHI->addIncoming(llvm::Constant::getNullValue(ReturnValue->getType()),
AdjustNull);
ReturnValue = PHI;
}
return RValue::get(ReturnValue);
}
long long clang_Type_getAlignOf(CXType T) {
if (T.kind == CXType_Invalid)
return CXTypeLayoutError_Invalid;
ASTContext &Ctx = cxtu::getASTUnit(GetTU(T))->getASTContext();
QualType QT = GetQualType(T);
// [expr.alignof] p1: return size_t value for complete object type, reference
// or array.
// [expr.alignof] p3: if reference type, return size of referenced type
if (QT->isReferenceType())
QT = QT.getNonReferenceType();
if (QT->isIncompleteType())
return CXTypeLayoutError_Incomplete;
if (QT->isDependentType())
return CXTypeLayoutError_Dependent;
// Exceptions by GCC extension - see ASTContext.cpp:1313 getTypeInfoImpl
// if (QT->isFunctionType()) return 4; // Bug #15511 - should be 1
// if (QT->isVoidType()) return 1;
return Ctx.getTypeAlignInChars(QT).getQuantity();
}
static RValue PerformReturnAdjustment(CodeGenFunction &CGF,
QualType ResultType, RValue RV,
const ThunkInfo &Thunk) {
// Emit the return adjustment.
bool NullCheckValue = !ResultType->isReferenceType();
llvm::BasicBlock *AdjustNull = 0;
llvm::BasicBlock *AdjustNotNull = 0;
llvm::BasicBlock *AdjustEnd = 0;
llvm::Value *ReturnValue = RV.getScalarVal();
if (NullCheckValue) {
AdjustNull = CGF.createBasicBlock("adjust.null");
AdjustNotNull = CGF.createBasicBlock("adjust.notnull");
AdjustEnd = CGF.createBasicBlock("adjust.end");
llvm::Value *IsNull = CGF.Builder.CreateIsNull(ReturnValue);
CGF.Builder.CreateCondBr(IsNull, AdjustNull, AdjustNotNull);
CGF.EmitBlock(AdjustNotNull);
}
ReturnValue = PerformTypeAdjustment(CGF, ReturnValue,
Thunk.Return.NonVirtual,
Thunk.Return.VBaseOffsetOffset,
/*IsReturnAdjustment*/true);
if (NullCheckValue) {
CGF.Builder.CreateBr(AdjustEnd);
CGF.EmitBlock(AdjustNull);
CGF.Builder.CreateBr(AdjustEnd);
CGF.EmitBlock(AdjustEnd);
llvm::PHINode *PHI = CGF.Builder.CreatePHI(ReturnValue->getType(), 2);
PHI->addIncoming(ReturnValue, AdjustNotNull);
PHI->addIncoming(llvm::Constant::getNullValue(ReturnValue->getType()),
AdjustNull);
ReturnValue = PHI;
}
return RValue::get(ReturnValue);
}
void
AggExprEmitter::EmitInitializationToLValue(Expr* E, LValue LV, QualType T) {
// FIXME: Ignore result?
// FIXME: Are initializers affected by volatile?
if (Dest.isZeroed() && isSimpleZero(E, CGF)) {
// Storing "i32 0" to a zero'd memory location is a noop.
} else if (isa<ImplicitValueInitExpr>(E)) {
EmitNullInitializationToLValue(LV, T);
} else if (T->isReferenceType()) {
RValue RV = CGF.EmitReferenceBindingToExpr(E, /*InitializedDecl=*/0);
CGF.EmitStoreThroughLValue(RV, LV, T);
} else if (T->isAnyComplexType()) {
CGF.EmitComplexExprIntoAddr(E, LV.getAddress(), false);
} else if (CGF.hasAggregateLLVMType(T)) {
CGF.EmitAggExpr(E, AggValueSlot::forAddr(LV.getAddress(), false, true,
false, Dest.isZeroed()));
} else {
CGF.EmitStoreThroughLValue(RValue::get(CGF.EmitScalarExpr(E)), LV, T);
}
}
/// \brief Build a pointer type.
///
/// \param T The type to which we'll be building a pointer.
///
/// \param Quals The cvr-qualifiers to be applied to the pointer type.
///
/// \param Loc The location of the entity whose type involves this
/// pointer type or, if there is no such entity, the location of the
/// type that will have pointer type.
///
/// \param Entity The name of the entity that involves the pointer
/// type, if known.
///
/// \returns A suitable pointer type, if there are no
/// errors. Otherwise, returns a NULL type.
QualType Sema::BuildPointerType(QualType T, unsigned Quals,
SourceLocation Loc, DeclarationName Entity) {
if (T->isReferenceType()) {
// C++ 8.3.2p4: There shall be no ... pointers to references ...
Diag(Loc, diag::err_illegal_decl_pointer_to_reference)
<< getPrintableNameForEntity(Entity);
return QualType();
}
// Enforce C99 6.7.3p2: "Types other than pointer types derived from
// object or incomplete types shall not be restrict-qualified."
if ((Quals & QualType::Restrict) && !T->isIncompleteOrObjectType()) {
Diag(Loc, diag::err_typecheck_invalid_restrict_invalid_pointee)
<< T;
Quals &= ~QualType::Restrict;
}
// Build the pointer type.
return Context.getPointerType(T).getQualifiedType(Quals);
}
void ReturnUndefChecker::checkPreStmt(const ReturnStmt *RS,
CheckerContext &C) const {
const Expr *RetE = RS->getRetValue();
if (!RetE)
return;
SVal RetVal = C.getSVal(RetE);
const StackFrameContext *SFC = C.getStackFrame();
QualType RT = CallEvent::getDeclaredResultType(SFC->getDecl());
if (RetVal.isUndef()) {
// "return;" is modeled to evaluate to an UndefinedVal. Allow UndefinedVal
// to be returned in functions returning void to support this pattern:
// void foo() {
// return;
// }
// void test() {
// return foo();
// }
if (!RT.isNull() && RT->isVoidType())
return;
// Not all blocks have explicitly-specified return types; if the return type
// is not available, but the return value expression has 'void' type, assume
// Sema already checked it.
if (RT.isNull() && isa<BlockDecl>(SFC->getDecl()) &&
RetE->getType()->isVoidType())
return;
emitUndef(C, RetE);
return;
}
if (RT.isNull())
return;
if (RT->isReferenceType()) {
checkReference(C, RetE, RetVal.castAs<DefinedOrUnknownSVal>());
return;
}
}
/// TryStaticImplicitCast - Tests whether a conversion according to C++ 5.2.9p2
/// is valid:
///
/// An expression e can be explicitly converted to a type T using a
/// @c static_cast if the declaration "T t(e);" is well-formed [...].
TryCastResult
TryStaticImplicitCast(Sema &Self, Expr *SrcExpr, QualType DestType,
bool CStyle, const SourceRange &OpRange, unsigned &msg)
{
if (DestType->isReferenceType()) {
// At this point of CheckStaticCast, if the destination is a reference,
// this has to work. There is no other way that works.
// On the other hand, if we're checking a C-style cast, we've still got
// the reinterpret_cast way. In that case, we pass an ICS so we don't
// get error messages.
ImplicitConversionSequence ICS;
bool failed = Self.CheckReferenceInit(SrcExpr, DestType, CStyle ? &ICS : 0);
if (!failed)
return TC_Success;
if (CStyle)
return TC_NotApplicable;
// If we didn't pass the ICS, we already got an error message.
msg = 0;
return TC_Failed;
}
if (DestType->isRecordType()) {
// There are no further possibilities for the target type being a class,
// neither in static_cast nor in a C-style cast. So we can fail here.
// FIXME: We need to store this constructor in the AST.
if (Self.PerformInitializationByConstructor(DestType, &SrcExpr, 1,
OpRange.getBegin(), OpRange, DeclarationName(), Sema::IK_Direct))
return TC_Success;
// The function already emitted an error.
msg = 0;
return TC_Failed;
}
// FIXME: To get a proper error from invalid conversions here, we need to
// reimplement more of this.
// FIXME: This does not actually perform the conversion, and thus does not
// check for ambiguity or access.
ImplicitConversionSequence ICS = Self.TryImplicitConversion(
SrcExpr, DestType);
return ICS.ConversionKind == ImplicitConversionSequence::BadConversion ?
TC_NotApplicable : TC_Success;
}
