| //===--- SemaDeclAttr.cpp - Declaration Attribute Handling ----------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements decl-related attribute processing. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang/Sema/Sema.h" |
| #include "TargetAttributesSema.h" |
| #include "clang/AST/ASTContext.h" |
| #include "clang/AST/DeclCXX.h" |
| #include "clang/AST/DeclObjC.h" |
| #include "clang/AST/Expr.h" |
| #include "clang/Basic/TargetInfo.h" |
| #include "clang/Sema/DeclSpec.h" |
| #include "llvm/ADT/StringExtras.h" |
| using namespace clang; |
| |
| //===----------------------------------------------------------------------===// |
| // Helper functions |
| //===----------------------------------------------------------------------===// |
| |
| static const FunctionType *getFunctionType(const Decl *d, |
| bool blocksToo = true) { |
| QualType Ty; |
| if (const ValueDecl *decl = dyn_cast<ValueDecl>(d)) |
| Ty = decl->getType(); |
| else if (const FieldDecl *decl = dyn_cast<FieldDecl>(d)) |
| Ty = decl->getType(); |
| else if (const TypedefDecl* decl = dyn_cast<TypedefDecl>(d)) |
| Ty = decl->getUnderlyingType(); |
| else |
| return 0; |
| |
| if (Ty->isFunctionPointerType()) |
| Ty = Ty->getAs<PointerType>()->getPointeeType(); |
| else if (blocksToo && Ty->isBlockPointerType()) |
| Ty = Ty->getAs<BlockPointerType>()->getPointeeType(); |
| |
| return Ty->getAs<FunctionType>(); |
| } |
| |
| // FIXME: We should provide an abstraction around a method or function |
| // to provide the following bits of information. |
| |
| /// isFunction - Return true if the given decl has function |
| /// type (function or function-typed variable). |
| static bool isFunction(const Decl *d) { |
| return getFunctionType(d, false) != NULL; |
| } |
| |
| /// isFunctionOrMethod - Return true if the given decl has function |
| /// type (function or function-typed variable) or an Objective-C |
| /// method. |
| static bool isFunctionOrMethod(const Decl *d) { |
| return isFunction(d)|| isa<ObjCMethodDecl>(d); |
| } |
| |
| /// isFunctionOrMethodOrBlock - Return true if the given decl has function |
| /// type (function or function-typed variable) or an Objective-C |
| /// method or a block. |
| static bool isFunctionOrMethodOrBlock(const Decl *d) { |
| if (isFunctionOrMethod(d)) |
| return true; |
| // check for block is more involved. |
| if (const VarDecl *V = dyn_cast<VarDecl>(d)) { |
| QualType Ty = V->getType(); |
| return Ty->isBlockPointerType(); |
| } |
| return isa<BlockDecl>(d); |
| } |
| |
| /// hasFunctionProto - Return true if the given decl has a argument |
| /// information. This decl should have already passed |
| /// isFunctionOrMethod or isFunctionOrMethodOrBlock. |
| static bool hasFunctionProto(const Decl *d) { |
| if (const FunctionType *FnTy = getFunctionType(d)) |
| return isa<FunctionProtoType>(FnTy); |
| else { |
| assert(isa<ObjCMethodDecl>(d) || isa<BlockDecl>(d)); |
| return true; |
| } |
| } |
| |
| /// getFunctionOrMethodNumArgs - Return number of function or method |
| /// arguments. It is an error to call this on a K&R function (use |
| /// hasFunctionProto first). |
| static unsigned getFunctionOrMethodNumArgs(const Decl *d) { |
| if (const FunctionType *FnTy = getFunctionType(d)) |
| return cast<FunctionProtoType>(FnTy)->getNumArgs(); |
| if (const BlockDecl *BD = dyn_cast<BlockDecl>(d)) |
| return BD->getNumParams(); |
| return cast<ObjCMethodDecl>(d)->param_size(); |
| } |
| |
| static QualType getFunctionOrMethodArgType(const Decl *d, unsigned Idx) { |
| if (const FunctionType *FnTy = getFunctionType(d)) |
| return cast<FunctionProtoType>(FnTy)->getArgType(Idx); |
| if (const BlockDecl *BD = dyn_cast<BlockDecl>(d)) |
| return BD->getParamDecl(Idx)->getType(); |
| |
| return cast<ObjCMethodDecl>(d)->param_begin()[Idx]->getType(); |
| } |
| |
| static QualType getFunctionOrMethodResultType(const Decl *d) { |
| if (const FunctionType *FnTy = getFunctionType(d)) |
| return cast<FunctionProtoType>(FnTy)->getResultType(); |
| return cast<ObjCMethodDecl>(d)->getResultType(); |
| } |
| |
| static bool isFunctionOrMethodVariadic(const Decl *d) { |
| if (const FunctionType *FnTy = getFunctionType(d)) { |
| const FunctionProtoType *proto = cast<FunctionProtoType>(FnTy); |
| return proto->isVariadic(); |
| } else if (const BlockDecl *BD = dyn_cast<BlockDecl>(d)) |
| return BD->isVariadic(); |
| else { |
| return cast<ObjCMethodDecl>(d)->isVariadic(); |
| } |
| } |
| |
| static inline bool isNSStringType(QualType T, ASTContext &Ctx) { |
| const ObjCObjectPointerType *PT = T->getAs<ObjCObjectPointerType>(); |
| if (!PT) |
| return false; |
| |
| ObjCInterfaceDecl *Cls = PT->getObjectType()->getInterface(); |
| if (!Cls) |
| return false; |
| |
| IdentifierInfo* ClsName = Cls->getIdentifier(); |
| |
| // FIXME: Should we walk the chain of classes? |
| return ClsName == &Ctx.Idents.get("NSString") || |
| ClsName == &Ctx.Idents.get("NSMutableString"); |
| } |
| |
| static inline bool isCFStringType(QualType T, ASTContext &Ctx) { |
| const PointerType *PT = T->getAs<PointerType>(); |
| if (!PT) |
| return false; |
| |
| const RecordType *RT = PT->getPointeeType()->getAs<RecordType>(); |
| if (!RT) |
| return false; |
| |
| const RecordDecl *RD = RT->getDecl(); |
| if (RD->getTagKind() != TTK_Struct) |
| return false; |
| |
| return RD->getIdentifier() == &Ctx.Idents.get("__CFString"); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Attribute Implementations |
| //===----------------------------------------------------------------------===// |
| |
| // FIXME: All this manual attribute parsing code is gross. At the |
| // least add some helper functions to check most argument patterns (# |
| // and types of args). |
| |
| static void HandleExtVectorTypeAttr(Scope *scope, Decl *d, |
| const AttributeList &Attr, Sema &S) { |
| TypedefDecl *tDecl = dyn_cast<TypedefDecl>(d); |
| if (tDecl == 0) { |
| S.Diag(Attr.getLoc(), diag::err_typecheck_ext_vector_not_typedef); |
| return; |
| } |
| |
| QualType curType = tDecl->getUnderlyingType(); |
| |
| Expr *sizeExpr; |
| |
| // Special case where the argument is a template id. |
| if (Attr.getParameterName()) { |
| CXXScopeSpec SS; |
| UnqualifiedId id; |
| id.setIdentifier(Attr.getParameterName(), Attr.getLoc()); |
| sizeExpr = S.ActOnIdExpression(scope, SS, id, false, false).takeAs<Expr>(); |
| } else { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 1) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| return; |
| } |
| sizeExpr = static_cast<Expr *>(Attr.getArg(0)); |
| } |
| |
| // Instantiate/Install the vector type, and let Sema build the type for us. |
| // This will run the reguired checks. |
| QualType T = S.BuildExtVectorType(curType, sizeExpr, Attr.getLoc()); |
| if (!T.isNull()) { |
| // FIXME: preserve the old source info. |
| tDecl->setTypeSourceInfo(S.Context.getTrivialTypeSourceInfo(T)); |
| |
| // Remember this typedef decl, we will need it later for diagnostics. |
| S.ExtVectorDecls.push_back(tDecl); |
| } |
| } |
| |
| static void HandlePackedAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() > 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| if (TagDecl *TD = dyn_cast<TagDecl>(d)) |
| TD->addAttr(::new (S.Context) PackedAttr(Attr.getLoc(), S.Context)); |
| else if (FieldDecl *FD = dyn_cast<FieldDecl>(d)) { |
| // If the alignment is less than or equal to 8 bits, the packed attribute |
| // has no effect. |
| if (!FD->getType()->isIncompleteType() && |
| S.Context.getTypeAlign(FD->getType()) <= 8) |
| S.Diag(Attr.getLoc(), diag::warn_attribute_ignored_for_field_of_type) |
| << Attr.getName() << FD->getType(); |
| else |
| FD->addAttr(::new (S.Context) PackedAttr(Attr.getLoc(), S.Context)); |
| } else |
| S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << Attr.getName(); |
| } |
| |
| static void HandleIBAction(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() > 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| // The IBAction attributes only apply to instance methods. |
| if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(d)) |
| if (MD->isInstanceMethod()) { |
| d->addAttr(::new (S.Context) IBActionAttr(Attr.getLoc(), S.Context)); |
| return; |
| } |
| |
| S.Diag(Attr.getLoc(), diag::err_attribute_ibaction) << Attr.getName(); |
| } |
| |
| static void HandleIBOutlet(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() > 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| // The IBOutlet attributes only apply to instance variables of |
| // Objective-C classes. |
| if (isa<ObjCIvarDecl>(d) || isa<ObjCPropertyDecl>(d)) { |
| d->addAttr(::new (S.Context) IBOutletAttr(Attr.getLoc(), S.Context)); |
| return; |
| } |
| |
| S.Diag(Attr.getLoc(), diag::err_attribute_iboutlet) << Attr.getName(); |
| } |
| |
| static void HandleIBOutletCollection(Decl *d, const AttributeList &Attr, |
| Sema &S) { |
| |
| // The iboutletcollection attribute can have zero or one arguments. |
| if (Attr.getParameterName() && Attr.getNumArgs() > 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| return; |
| } |
| |
| // The IBOutletCollection attributes only apply to instance variables of |
| // Objective-C classes. |
| if (!(isa<ObjCIvarDecl>(d) || isa<ObjCPropertyDecl>(d))) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_iboutlet) << Attr.getName(); |
| return; |
| } |
| if (const ValueDecl *VD = dyn_cast<ValueDecl>(d)) |
| if (!VD->getType()->getAs<ObjCObjectPointerType>()) { |
| S.Diag(Attr.getLoc(), diag::err_iboutletcollection_object_type) |
| << VD->getType() << 0; |
| return; |
| } |
| if (const ObjCPropertyDecl *PD = dyn_cast<ObjCPropertyDecl>(d)) |
| if (!PD->getType()->getAs<ObjCObjectPointerType>()) { |
| S.Diag(Attr.getLoc(), diag::err_iboutletcollection_object_type) |
| << PD->getType() << 1; |
| return; |
| } |
| |
| IdentifierInfo *II = Attr.getParameterName(); |
| if (!II) |
| II = &S.Context.Idents.get("id"); |
| |
| ParsedType TypeRep = S.getTypeName(*II, Attr.getLoc(), |
| S.getScopeForContext(d->getDeclContext()->getParent())); |
| if (!TypeRep) { |
| S.Diag(Attr.getLoc(), diag::err_iboutletcollection_type) << II; |
| return; |
| } |
| QualType QT = TypeRep.get(); |
| // Diagnose use of non-object type in iboutletcollection attribute. |
| // FIXME. Gnu attribute extension ignores use of builtin types in |
| // attributes. So, __attribute__((iboutletcollection(char))) will be |
| // treated as __attribute__((iboutletcollection())). |
| if (!QT->isObjCIdType() && !QT->isObjCClassType() && |
| !QT->isObjCObjectType()) { |
| S.Diag(Attr.getLoc(), diag::err_iboutletcollection_type) << II; |
| return; |
| } |
| d->addAttr(::new (S.Context) IBOutletCollectionAttr(Attr.getLoc(), S.Context, |
| QT)); |
| } |
| |
| static void HandleNonNullAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // GCC ignores the nonnull attribute on K&R style function prototypes, so we |
| // ignore it as well |
| if (!isFunctionOrMethod(d) || !hasFunctionProto(d)) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 0 /*function*/; |
| return; |
| } |
| |
| unsigned NumArgs = getFunctionOrMethodNumArgs(d); |
| |
| // The nonnull attribute only applies to pointers. |
| llvm::SmallVector<unsigned, 10> NonNullArgs; |
| |
| for (AttributeList::arg_iterator I=Attr.arg_begin(), |
| E=Attr.arg_end(); I!=E; ++I) { |
| |
| |
| // The argument must be an integer constant expression. |
| Expr *Ex = static_cast<Expr *>(*I); |
| llvm::APSInt ArgNum(32); |
| if (Ex->isTypeDependent() || Ex->isValueDependent() || |
| !Ex->isIntegerConstantExpr(ArgNum, S.Context)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int) |
| << "nonnull" << Ex->getSourceRange(); |
| return; |
| } |
| |
| unsigned x = (unsigned) ArgNum.getZExtValue(); |
| |
| if (x < 1 || x > NumArgs) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_out_of_bounds) |
| << "nonnull" << I.getArgNum() << Ex->getSourceRange(); |
| return; |
| } |
| |
| --x; |
| |
| // Is the function argument a pointer type? |
| QualType T = getFunctionOrMethodArgType(d, x); |
| if (!T->isAnyPointerType() && !T->isBlockPointerType()) { |
| // FIXME: Should also highlight argument in decl. |
| S.Diag(Attr.getLoc(), diag::warn_nonnull_pointers_only) |
| << "nonnull" << Ex->getSourceRange(); |
| continue; |
| } |
| |
| NonNullArgs.push_back(x); |
| } |
| |
| // If no arguments were specified to __attribute__((nonnull)) then all pointer |
| // arguments have a nonnull attribute. |
| if (NonNullArgs.empty()) { |
| for (unsigned I = 0, E = getFunctionOrMethodNumArgs(d); I != E; ++I) { |
| QualType T = getFunctionOrMethodArgType(d, I); |
| if (T->isAnyPointerType() || T->isBlockPointerType()) |
| NonNullArgs.push_back(I); |
| } |
| |
| if (NonNullArgs.empty()) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_nonnull_no_pointers); |
| return; |
| } |
| } |
| |
| unsigned* start = &NonNullArgs[0]; |
| unsigned size = NonNullArgs.size(); |
| llvm::array_pod_sort(start, start + size); |
| d->addAttr(::new (S.Context) NonNullAttr(Attr.getLoc(), S.Context, start, |
| size)); |
| } |
| |
| static void HandleOwnershipAttr(Decl *d, const AttributeList &AL, Sema &S) { |
| // This attribute must be applied to a function declaration. |
| // The first argument to the attribute must be a string, |
| // the name of the resource, for example "malloc". |
| // The following arguments must be argument indexes, the arguments must be |
| // of integer type for Returns, otherwise of pointer type. |
| // The difference between Holds and Takes is that a pointer may still be used |
| // after being held. free() should be __attribute((ownership_takes)), whereas |
| // a list append function may well be __attribute((ownership_holds)). |
| |
| if (!AL.getParameterName()) { |
| S.Diag(AL.getLoc(), diag::err_attribute_argument_n_not_string) |
| << AL.getName()->getName() << 1; |
| return; |
| } |
| // Figure out our Kind, and check arguments while we're at it. |
| OwnershipAttr::OwnershipKind K; |
| switch (AL.getKind()) { |
| case AttributeList::AT_ownership_takes: |
| K = OwnershipAttr::Takes; |
| if (AL.getNumArgs() < 1) { |
| S.Diag(AL.getLoc(), diag::err_attribute_wrong_number_arguments) << 2; |
| return; |
| } |
| break; |
| case AttributeList::AT_ownership_holds: |
| K = OwnershipAttr::Holds; |
| if (AL.getNumArgs() < 1) { |
| S.Diag(AL.getLoc(), diag::err_attribute_wrong_number_arguments) << 2; |
| return; |
| } |
| break; |
| case AttributeList::AT_ownership_returns: |
| K = OwnershipAttr::Returns; |
| if (AL.getNumArgs() > 1) { |
| S.Diag(AL.getLoc(), diag::err_attribute_wrong_number_arguments) |
| << AL.getNumArgs() + 1; |
| return; |
| } |
| break; |
| default: |
| // This should never happen given how we are called. |
| llvm_unreachable("Unknown ownership attribute"); |
| } |
| |
| if (!isFunction(d) || !hasFunctionProto(d)) { |
| S.Diag(AL.getLoc(), diag::warn_attribute_wrong_decl_type) << AL.getName() |
| << 0 /*function*/; |
| return; |
| } |
| |
| unsigned NumArgs = getFunctionOrMethodNumArgs(d); |
| |
| llvm::StringRef Module = AL.getParameterName()->getName(); |
| |
| // Normalize the argument, __foo__ becomes foo. |
| if (Module.startswith("__") && Module.endswith("__")) |
| Module = Module.substr(2, Module.size() - 4); |
| |
| llvm::SmallVector<unsigned, 10> OwnershipArgs; |
| |
| for (AttributeList::arg_iterator I = AL.arg_begin(), E = AL.arg_end(); I != E; |
| ++I) { |
| |
| Expr *IdxExpr = static_cast<Expr *>(*I); |
| llvm::APSInt ArgNum(32); |
| if (IdxExpr->isTypeDependent() || IdxExpr->isValueDependent() |
| || !IdxExpr->isIntegerConstantExpr(ArgNum, S.Context)) { |
| S.Diag(AL.getLoc(), diag::err_attribute_argument_not_int) |
| << AL.getName()->getName() << IdxExpr->getSourceRange(); |
| continue; |
| } |
| |
| unsigned x = (unsigned) ArgNum.getZExtValue(); |
| |
| if (x > NumArgs || x < 1) { |
| S.Diag(AL.getLoc(), diag::err_attribute_argument_out_of_bounds) |
| << AL.getName()->getName() << x << IdxExpr->getSourceRange(); |
| continue; |
| } |
| --x; |
| switch (K) { |
| case OwnershipAttr::Takes: |
| case OwnershipAttr::Holds: { |
| // Is the function argument a pointer type? |
| QualType T = getFunctionOrMethodArgType(d, x); |
| if (!T->isAnyPointerType() && !T->isBlockPointerType()) { |
| // FIXME: Should also highlight argument in decl. |
| S.Diag(AL.getLoc(), diag::err_ownership_type) |
| << ((K==OwnershipAttr::Takes)?"ownership_takes":"ownership_holds") |
| << "pointer" |
| << IdxExpr->getSourceRange(); |
| continue; |
| } |
| break; |
| } |
| case OwnershipAttr::Returns: { |
| if (AL.getNumArgs() > 1) { |
| // Is the function argument an integer type? |
| Expr *IdxExpr = static_cast<Expr *>(AL.getArg(0)); |
| llvm::APSInt ArgNum(32); |
| if (IdxExpr->isTypeDependent() || IdxExpr->isValueDependent() |
| || !IdxExpr->isIntegerConstantExpr(ArgNum, S.Context)) { |
| S.Diag(AL.getLoc(), diag::err_ownership_type) |
| << "ownership_returns" << "integer" |
| << IdxExpr->getSourceRange(); |
| return; |
| } |
| } |
| break; |
| } |
| default: |
| llvm_unreachable("Unknown ownership attribute"); |
| } // switch |
| |
| // Check we don't have a conflict with another ownership attribute. |
| for (specific_attr_iterator<OwnershipAttr> |
| i = d->specific_attr_begin<OwnershipAttr>(), |
| e = d->specific_attr_end<OwnershipAttr>(); |
| i != e; ++i) { |
| if ((*i)->getOwnKind() != K) { |
| for (const unsigned *I = (*i)->args_begin(), *E = (*i)->args_end(); |
| I!=E; ++I) { |
| if (x == *I) { |
| S.Diag(AL.getLoc(), diag::err_attributes_are_not_compatible) |
| << AL.getName()->getName() << "ownership_*"; |
| } |
| } |
| } |
| } |
| OwnershipArgs.push_back(x); |
| } |
| |
| unsigned* start = OwnershipArgs.data(); |
| unsigned size = OwnershipArgs.size(); |
| llvm::array_pod_sort(start, start + size); |
| |
| if (K != OwnershipAttr::Returns && OwnershipArgs.empty()) { |
| S.Diag(AL.getLoc(), diag::err_attribute_wrong_number_arguments) << 2; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) OwnershipAttr(AL.getLoc(), S.Context, K, Module, |
| start, size)); |
| } |
| |
| static bool isStaticVarOrStaticFunciton(Decl *D) { |
| if (VarDecl *VD = dyn_cast<VarDecl>(D)) |
| return VD->getStorageClass() == VarDecl::Static; |
| if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) |
| return FD->getStorageClass() == FunctionDecl::Static; |
| return false; |
| } |
| |
| static void HandleWeakRefAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // Check the attribute arguments. |
| if (Attr.getNumArgs() > 1) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| return; |
| } |
| |
| // gcc rejects |
| // class c { |
| // static int a __attribute__((weakref ("v2"))); |
| // static int b() __attribute__((weakref ("f3"))); |
| // }; |
| // and ignores the attributes of |
| // void f(void) { |
| // static int a __attribute__((weakref ("v2"))); |
| // } |
| // we reject them |
| if (const DeclContext *Ctx = d->getDeclContext()) { |
| Ctx = Ctx->getLookupContext(); |
| if (!isa<TranslationUnitDecl>(Ctx) && !isa<NamespaceDecl>(Ctx) ) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_weakref_not_global_context) << |
| dyn_cast<NamedDecl>(d)->getNameAsString(); |
| return; |
| } |
| } |
| |
| // The GCC manual says |
| // |
| // At present, a declaration to which `weakref' is attached can only |
| // be `static'. |
| // |
| // It also says |
| // |
| // Without a TARGET, |
| // given as an argument to `weakref' or to `alias', `weakref' is |
| // equivalent to `weak'. |
| // |
| // gcc 4.4.1 will accept |
| // int a7 __attribute__((weakref)); |
| // as |
| // int a7 __attribute__((weak)); |
| // This looks like a bug in gcc. We reject that for now. We should revisit |
| // it if this behaviour is actually used. |
| |
| if (!isStaticVarOrStaticFunciton(d)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_weakref_not_static) << |
| dyn_cast<NamedDecl>(d)->getNameAsString(); |
| return; |
| } |
| |
| // GCC rejects |
| // static ((alias ("y"), weakref)). |
| // Should we? How to check that weakref is before or after alias? |
| |
| if (Attr.getNumArgs() == 1) { |
| Expr *Arg = static_cast<Expr*>(Attr.getArg(0)); |
| Arg = Arg->IgnoreParenCasts(); |
| StringLiteral *Str = dyn_cast<StringLiteral>(Arg); |
| |
| if (Str == 0 || Str->isWide()) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string) |
| << "weakref" << 1; |
| return; |
| } |
| // GCC will accept anything as the argument of weakref. Should we |
| // check for an existing decl? |
| d->addAttr(::new (S.Context) AliasAttr(Attr.getLoc(), S.Context, Str->getString())); |
| } |
| |
| d->addAttr(::new (S.Context) WeakRefAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleAliasAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 1) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| return; |
| } |
| |
| Expr *Arg = static_cast<Expr*>(Attr.getArg(0)); |
| Arg = Arg->IgnoreParenCasts(); |
| StringLiteral *Str = dyn_cast<StringLiteral>(Arg); |
| |
| if (Str == 0 || Str->isWide()) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string) |
| << "alias" << 1; |
| return; |
| } |
| |
| // FIXME: check if target symbol exists in current file |
| |
| d->addAttr(::new (S.Context) AliasAttr(Attr.getLoc(), S.Context, Str->getString())); |
| } |
| |
| static void HandleAlwaysInlineAttr(Decl *d, const AttributeList &Attr, |
| Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| if (!isa<FunctionDecl>(d)) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 0 /*function*/; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) AlwaysInlineAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleMallocAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(d)) { |
| QualType RetTy = FD->getResultType(); |
| if (RetTy->isAnyPointerType() || RetTy->isBlockPointerType()) { |
| d->addAttr(::new (S.Context) MallocAttr(Attr.getLoc(), S.Context)); |
| return; |
| } |
| } |
| |
| S.Diag(Attr.getLoc(), diag::warn_attribute_malloc_pointer_only); |
| } |
| |
| static void HandleNoReturnAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| /* Diagnostics (if any) was emitted by Sema::ProcessFnAttr(). */ |
| assert(Attr.isInvalid() == false); |
| d->addAttr(::new (S.Context) NoReturnAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleAnalyzerNoReturnAttr(Decl *d, const AttributeList &Attr, |
| Sema &S) { |
| |
| // The checking path for 'noreturn' and 'analyzer_noreturn' are different |
| // because 'analyzer_noreturn' does not impact the type. |
| |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| if (!isFunctionOrMethod(d) && !isa<BlockDecl>(d)) { |
| ValueDecl *VD = dyn_cast<ValueDecl>(d); |
| if (VD == 0 || (!VD->getType()->isBlockPointerType() |
| && !VD->getType()->isFunctionPointerType())) { |
| S.Diag(Attr.getLoc(), |
| Attr.isCXX0XAttribute() ? diag::err_attribute_wrong_decl_type |
| : diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 0 /*function*/; |
| return; |
| } |
| } |
| |
| d->addAttr(::new (S.Context) AnalyzerNoReturnAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| // PS3 PPU-specific. |
| static void HandleVecReturnAttr(Decl *d, const AttributeList &Attr, |
| Sema &S) { |
| /* |
| Returning a Vector Class in Registers |
| |
| According to the PPU ABI specifications, a class with a single member of vector type is returned in |
| memory when used as the return value of a function. This results in inefficient code when implementing |
| vector classes. To return the value in a single vector register, add the vecreturn attribute to the class |
| definition. This attribute is also applicable to struct types. |
| |
| Example: |
| |
| struct Vector |
| { |
| __vector float xyzw; |
| } __attribute__((vecreturn)); |
| |
| Vector Add(Vector lhs, Vector rhs) |
| { |
| Vector result; |
| result.xyzw = vec_add(lhs.xyzw, rhs.xyzw); |
| return result; // This will be returned in a register |
| } |
| */ |
| if (!isa<CXXRecordDecl>(d)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_decl_type) |
| << Attr.getName() << 9 /*class*/; |
| return; |
| } |
| |
| if (d->getAttr<VecReturnAttr>()) { |
| S.Diag(Attr.getLoc(), diag::err_repeat_attribute) << "vecreturn"; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) VecReturnAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleDependencyAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| if (!isFunctionOrMethod(d) && !isa<ParmVarDecl>(d)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_decl_type) |
| << Attr.getName() << 8 /*function, method, or parameter*/; |
| return; |
| } |
| // FIXME: Actually store the attribute on the declaration |
| } |
| |
| static void HandleUnusedAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| if (!isa<VarDecl>(d) && !isa<ObjCIvarDecl>(d) && !isFunctionOrMethod(d) && |
| !isa<TypeDecl>(d)) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 2 /*variable and function*/; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) UnusedAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleUsedAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| if (const VarDecl *VD = dyn_cast<VarDecl>(d)) { |
| if (VD->hasLocalStorage() || VD->hasExternalStorage()) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "used"; |
| return; |
| } |
| } else if (!isFunctionOrMethod(d)) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 2 /*variable and function*/; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) UsedAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleConstructorAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0 && Attr.getNumArgs() != 1) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) |
| << "0 or 1"; |
| return; |
| } |
| |
| int priority = 65535; // FIXME: Do not hardcode such constants. |
| if (Attr.getNumArgs() > 0) { |
| Expr *E = static_cast<Expr *>(Attr.getArg(0)); |
| llvm::APSInt Idx(32); |
| if (E->isTypeDependent() || E->isValueDependent() || |
| !E->isIntegerConstantExpr(Idx, S.Context)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int) |
| << "constructor" << 1 << E->getSourceRange(); |
| return; |
| } |
| priority = Idx.getZExtValue(); |
| } |
| |
| if (!isa<FunctionDecl>(d)) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 0 /*function*/; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) ConstructorAttr(Attr.getLoc(), S.Context, priority)); |
| } |
| |
| static void HandleDestructorAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0 && Attr.getNumArgs() != 1) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) |
| << "0 or 1"; |
| return; |
| } |
| |
| int priority = 65535; // FIXME: Do not hardcode such constants. |
| if (Attr.getNumArgs() > 0) { |
| Expr *E = static_cast<Expr *>(Attr.getArg(0)); |
| llvm::APSInt Idx(32); |
| if (E->isTypeDependent() || E->isValueDependent() || |
| !E->isIntegerConstantExpr(Idx, S.Context)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int) |
| << "destructor" << 1 << E->getSourceRange(); |
| return; |
| } |
| priority = Idx.getZExtValue(); |
| } |
| |
| if (!isa<FunctionDecl>(d)) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 0 /*function*/; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) DestructorAttr(Attr.getLoc(), S.Context, priority)); |
| } |
| |
| static void HandleDeprecatedAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) DeprecatedAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleUnavailableAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) UnavailableAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleVisibilityAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 1) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| return; |
| } |
| |
| Expr *Arg = static_cast<Expr*>(Attr.getArg(0)); |
| Arg = Arg->IgnoreParenCasts(); |
| StringLiteral *Str = dyn_cast<StringLiteral>(Arg); |
| |
| if (Str == 0 || Str->isWide()) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string) |
| << "visibility" << 1; |
| return; |
| } |
| |
| llvm::StringRef TypeStr = Str->getString(); |
| VisibilityAttr::VisibilityType type; |
| |
| if (TypeStr == "default") |
| type = VisibilityAttr::Default; |
| else if (TypeStr == "hidden") |
| type = VisibilityAttr::Hidden; |
| else if (TypeStr == "internal") |
| type = VisibilityAttr::Hidden; // FIXME |
| else if (TypeStr == "protected") |
| type = VisibilityAttr::Protected; |
| else { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_unknown_visibility) << TypeStr; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) VisibilityAttr(Attr.getLoc(), S.Context, type)); |
| } |
| |
| static void HandleObjCExceptionAttr(Decl *D, const AttributeList &Attr, |
| Sema &S) { |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| ObjCInterfaceDecl *OCI = dyn_cast<ObjCInterfaceDecl>(D); |
| if (OCI == 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_requires_objc_interface); |
| return; |
| } |
| |
| D->addAttr(::new (S.Context) ObjCExceptionAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleObjCNSObject(Decl *D, const AttributeList &Attr, Sema &S) { |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| return; |
| } |
| if (TypedefDecl *TD = dyn_cast<TypedefDecl>(D)) { |
| QualType T = TD->getUnderlyingType(); |
| if (!T->isPointerType() || |
| !T->getAs<PointerType>()->getPointeeType()->isRecordType()) { |
| S.Diag(TD->getLocation(), diag::err_nsobject_attribute); |
| return; |
| } |
| } |
| D->addAttr(::new (S.Context) ObjCNSObjectAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void |
| HandleOverloadableAttr(Decl *D, const AttributeList &Attr, Sema &S) { |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| return; |
| } |
| |
| if (!isa<FunctionDecl>(D)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_overloadable_not_function); |
| return; |
| } |
| |
| D->addAttr(::new (S.Context) OverloadableAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleBlocksAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| if (!Attr.getParameterName()) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string) |
| << "blocks" << 1; |
| return; |
| } |
| |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| return; |
| } |
| |
| BlocksAttr::BlockType type; |
| if (Attr.getParameterName()->isStr("byref")) |
| type = BlocksAttr::ByRef; |
| else { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_type_not_supported) |
| << "blocks" << Attr.getParameterName(); |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) BlocksAttr(Attr.getLoc(), S.Context, type)); |
| } |
| |
| static void HandleSentinelAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() > 2) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) |
| << "0, 1 or 2"; |
| return; |
| } |
| |
| int sentinel = 0; |
| if (Attr.getNumArgs() > 0) { |
| Expr *E = static_cast<Expr *>(Attr.getArg(0)); |
| llvm::APSInt Idx(32); |
| if (E->isTypeDependent() || E->isValueDependent() || |
| !E->isIntegerConstantExpr(Idx, S.Context)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int) |
| << "sentinel" << 1 << E->getSourceRange(); |
| return; |
| } |
| sentinel = Idx.getZExtValue(); |
| |
| if (sentinel < 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_sentinel_less_than_zero) |
| << E->getSourceRange(); |
| return; |
| } |
| } |
| |
| int nullPos = 0; |
| if (Attr.getNumArgs() > 1) { |
| Expr *E = static_cast<Expr *>(Attr.getArg(1)); |
| llvm::APSInt Idx(32); |
| if (E->isTypeDependent() || E->isValueDependent() || |
| !E->isIntegerConstantExpr(Idx, S.Context)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int) |
| << "sentinel" << 2 << E->getSourceRange(); |
| return; |
| } |
| nullPos = Idx.getZExtValue(); |
| |
| if (nullPos > 1 || nullPos < 0) { |
| // FIXME: This error message could be improved, it would be nice |
| // to say what the bounds actually are. |
| S.Diag(Attr.getLoc(), diag::err_attribute_sentinel_not_zero_or_one) |
| << E->getSourceRange(); |
| return; |
| } |
| } |
| |
| if (FunctionDecl *FD = dyn_cast<FunctionDecl>(d)) { |
| const FunctionType *FT = FD->getType()->getAs<FunctionType>(); |
| assert(FT && "FunctionDecl has non-function type?"); |
| |
| if (isa<FunctionNoProtoType>(FT)) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_sentinel_named_arguments); |
| return; |
| } |
| |
| if (!cast<FunctionProtoType>(FT)->isVariadic()) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_sentinel_not_variadic) << 0; |
| return; |
| } |
| } else if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(d)) { |
| if (!MD->isVariadic()) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_sentinel_not_variadic) << 0; |
| return; |
| } |
| } else if (isa<BlockDecl>(d)) { |
| // Note! BlockDecl is typeless. Variadic diagnostics will be issued by the |
| // caller. |
| ; |
| } else if (const VarDecl *V = dyn_cast<VarDecl>(d)) { |
| QualType Ty = V->getType(); |
| if (Ty->isBlockPointerType() || Ty->isFunctionPointerType()) { |
| const FunctionType *FT = Ty->isFunctionPointerType() ? getFunctionType(d) |
| : Ty->getAs<BlockPointerType>()->getPointeeType()->getAs<FunctionType>(); |
| if (!cast<FunctionProtoType>(FT)->isVariadic()) { |
| int m = Ty->isFunctionPointerType() ? 0 : 1; |
| S.Diag(Attr.getLoc(), diag::warn_attribute_sentinel_not_variadic) << m; |
| return; |
| } |
| } else { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 6 /*function, method or block */; |
| return; |
| } |
| } else { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 6 /*function, method or block */; |
| return; |
| } |
| d->addAttr(::new (S.Context) SentinelAttr(Attr.getLoc(), S.Context, sentinel, nullPos)); |
| } |
| |
| static void HandleWarnUnusedResult(Decl *D, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| if (!isFunction(D) && !isa<ObjCMethodDecl>(D)) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 0 /*function*/; |
| return; |
| } |
| |
| if (isFunction(D) && getFunctionType(D)->getResultType()->isVoidType()) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_void_function_method) |
| << Attr.getName() << 0; |
| return; |
| } |
| if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) |
| if (MD->getResultType()->isVoidType()) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_void_function_method) |
| << Attr.getName() << 1; |
| return; |
| } |
| |
| D->addAttr(::new (S.Context) WarnUnusedResultAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleWeakAttr(Decl *D, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| /* weak only applies to non-static declarations */ |
| if (isStaticVarOrStaticFunciton(D)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_weak_static) << |
| dyn_cast<NamedDecl>(D)->getNameAsString(); |
| return; |
| } |
| |
| // TODO: could also be applied to methods? |
| if (!isa<FunctionDecl>(D) && !isa<VarDecl>(D)) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 2 /*variable and function*/; |
| return; |
| } |
| |
| D->addAttr(::new (S.Context) WeakAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleWeakImportAttr(Decl *D, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| // weak_import only applies to variable & function declarations. |
| bool isDef = false; |
| if (VarDecl *VD = dyn_cast<VarDecl>(D)) { |
| isDef = (!VD->hasExternalStorage() || VD->getInit()); |
| } else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
| isDef = FD->hasBody(); |
| } else if (isa<ObjCPropertyDecl>(D) || isa<ObjCMethodDecl>(D)) { |
| // We ignore weak import on properties and methods |
| return; |
| } else if (!(S.LangOpts.ObjCNonFragileABI && isa<ObjCInterfaceDecl>(D))) { |
| // Don't issue the warning for darwin as target; yet, ignore the attribute. |
| if (S.Context.Target.getTriple().getOS() != llvm::Triple::Darwin || |
| !isa<ObjCInterfaceDecl>(D)) |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 2 /*variable and function*/; |
| return; |
| } |
| |
| // Merge should handle any subsequent violations. |
| if (isDef) { |
| S.Diag(Attr.getLoc(), |
| diag::warn_attribute_weak_import_invalid_on_definition) |
| << "weak_import" << 2 /*variable and function*/; |
| return; |
| } |
| |
| D->addAttr(::new (S.Context) WeakImportAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleReqdWorkGroupSize(Decl *D, const AttributeList &Attr, |
| Sema &S) { |
| // Attribute has 3 arguments. |
| if (Attr.getNumArgs() != 3) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| return; |
| } |
| |
| unsigned WGSize[3]; |
| for (unsigned i = 0; i < 3; ++i) { |
| Expr *E = static_cast<Expr *>(Attr.getArg(i)); |
| llvm::APSInt ArgNum(32); |
| if (E->isTypeDependent() || E->isValueDependent() || |
| !E->isIntegerConstantExpr(ArgNum, S.Context)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int) |
| << "reqd_work_group_size" << E->getSourceRange(); |
| return; |
| } |
| WGSize[i] = (unsigned) ArgNum.getZExtValue(); |
| } |
| D->addAttr(::new (S.Context) ReqdWorkGroupSizeAttr(Attr.getLoc(), S.Context, |
| WGSize[0], WGSize[1], |
| WGSize[2])); |
| } |
| |
| static void HandleSectionAttr(Decl *D, const AttributeList &Attr, Sema &S) { |
| // Attribute has no arguments. |
| if (Attr.getNumArgs() != 1) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| return; |
| } |
| |
| // Make sure that there is a string literal as the sections's single |
| // argument. |
| Expr *ArgExpr = static_cast<Expr *>(Attr.getArg(0)); |
| StringLiteral *SE = dyn_cast<StringLiteral>(ArgExpr); |
| if (!SE) { |
| S.Diag(ArgExpr->getLocStart(), diag::err_attribute_not_string) << "section"; |
| return; |
| } |
| |
| // If the target wants to validate the section specifier, make it happen. |
| std::string Error = S.Context.Target.isValidSectionSpecifier(SE->getString()); |
| if (!Error.empty()) { |
| S.Diag(SE->getLocStart(), diag::err_attribute_section_invalid_for_target) |
| << Error; |
| return; |
| } |
| |
| // This attribute cannot be applied to local variables. |
| if (isa<VarDecl>(D) && cast<VarDecl>(D)->hasLocalStorage()) { |
| S.Diag(SE->getLocStart(), diag::err_attribute_section_local_variable); |
| return; |
| } |
| |
| D->addAttr(::new (S.Context) SectionAttr(Attr.getLoc(), S.Context, SE->getString())); |
| } |
| |
| |
| static void HandleNothrowAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) NoThrowAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleConstAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) ConstAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandlePureAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) PureAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleCleanupAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| if (!Attr.getParameterName()) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| return; |
| } |
| |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| return; |
| } |
| |
| VarDecl *VD = dyn_cast<VarDecl>(d); |
| |
| if (!VD || !VD->hasLocalStorage()) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "cleanup"; |
| return; |
| } |
| |
| // Look up the function |
| // FIXME: Lookup probably isn't looking in the right place |
| // FIXME: The lookup source location should be in the attribute, not the |
| // start of the attribute. |
| NamedDecl *CleanupDecl |
| = S.LookupSingleName(S.TUScope, Attr.getParameterName(), Attr.getLoc(), |
| Sema::LookupOrdinaryName); |
| if (!CleanupDecl) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_cleanup_arg_not_found) << |
| Attr.getParameterName(); |
| return; |
| } |
| |
| FunctionDecl *FD = dyn_cast<FunctionDecl>(CleanupDecl); |
| if (!FD) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_cleanup_arg_not_function) << |
| Attr.getParameterName(); |
| return; |
| } |
| |
| if (FD->getNumParams() != 1) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_cleanup_func_must_take_one_arg) << |
| Attr.getParameterName(); |
| return; |
| } |
| |
| // We're currently more strict than GCC about what function types we accept. |
| // If this ever proves to be a problem it should be easy to fix. |
| QualType Ty = S.Context.getPointerType(VD->getType()); |
| QualType ParamTy = FD->getParamDecl(0)->getType(); |
| if (S.CheckAssignmentConstraints(ParamTy, Ty) != Sema::Compatible) { |
| S.Diag(Attr.getLoc(), |
| diag::err_attribute_cleanup_func_arg_incompatible_type) << |
| Attr.getParameterName() << ParamTy << Ty; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) CleanupAttr(Attr.getLoc(), S.Context, FD)); |
| } |
| |
| /// Handle __attribute__((format_arg((idx)))) attribute based on |
| /// http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html |
| static void HandleFormatArgAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| if (Attr.getNumArgs() != 1) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| return; |
| } |
| if (!isFunctionOrMethod(d) || !hasFunctionProto(d)) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 0 /*function*/; |
| return; |
| } |
| // FIXME: in C++ the implicit 'this' function parameter also counts. this is |
| // needed in order to be compatible with GCC the index must start with 1. |
| unsigned NumArgs = getFunctionOrMethodNumArgs(d); |
| unsigned FirstIdx = 1; |
| // checks for the 2nd argument |
| Expr *IdxExpr = static_cast<Expr *>(Attr.getArg(0)); |
| llvm::APSInt Idx(32); |
| if (IdxExpr->isTypeDependent() || IdxExpr->isValueDependent() || |
| !IdxExpr->isIntegerConstantExpr(Idx, S.Context)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int) |
| << "format" << 2 << IdxExpr->getSourceRange(); |
| return; |
| } |
| |
| if (Idx.getZExtValue() < FirstIdx || Idx.getZExtValue() > NumArgs) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_out_of_bounds) |
| << "format" << 2 << IdxExpr->getSourceRange(); |
| return; |
| } |
| |
| unsigned ArgIdx = Idx.getZExtValue() - 1; |
| |
| // make sure the format string is really a string |
| QualType Ty = getFunctionOrMethodArgType(d, ArgIdx); |
| |
| bool not_nsstring_type = !isNSStringType(Ty, S.Context); |
| if (not_nsstring_type && |
| !isCFStringType(Ty, S.Context) && |
| (!Ty->isPointerType() || |
| !Ty->getAs<PointerType>()->getPointeeType()->isCharType())) { |
| // FIXME: Should highlight the actual expression that has the wrong type. |
| S.Diag(Attr.getLoc(), diag::err_format_attribute_not) |
| << (not_nsstring_type ? "a string type" : "an NSString") |
| << IdxExpr->getSourceRange(); |
| return; |
| } |
| Ty = getFunctionOrMethodResultType(d); |
| if (!isNSStringType(Ty, S.Context) && |
| !isCFStringType(Ty, S.Context) && |
| (!Ty->isPointerType() || |
| !Ty->getAs<PointerType>()->getPointeeType()->isCharType())) { |
| // FIXME: Should highlight the actual expression that has the wrong type. |
| S.Diag(Attr.getLoc(), diag::err_format_attribute_result_not) |
| << (not_nsstring_type ? "string type" : "NSString") |
| << IdxExpr->getSourceRange(); |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) FormatArgAttr(Attr.getLoc(), S.Context, Idx.getZExtValue())); |
| } |
| |
| enum FormatAttrKind { |
| CFStringFormat, |
| NSStringFormat, |
| StrftimeFormat, |
| SupportedFormat, |
| IgnoredFormat, |
| InvalidFormat |
| }; |
| |
| /// getFormatAttrKind - Map from format attribute names to supported format |
| /// types. |
| static FormatAttrKind getFormatAttrKind(llvm::StringRef Format) { |
| // Check for formats that get handled specially. |
| if (Format == "NSString") |
| return NSStringFormat; |
| if (Format == "CFString") |
| return CFStringFormat; |
| if (Format == "strftime") |
| return StrftimeFormat; |
| |
| // Otherwise, check for supported formats. |
| if (Format == "scanf" || Format == "printf" || Format == "printf0" || |
| Format == "strfmon" || Format == "cmn_err" || Format == "strftime" || |
| Format == "NSString" || Format == "CFString" || Format == "vcmn_err" || |
| Format == "zcmn_err") |
| return SupportedFormat; |
| |
| if (Format == "gcc_diag" || Format == "gcc_cdiag" || |
| Format == "gcc_cxxdiag" || Format == "gcc_tdiag") |
| return IgnoredFormat; |
| |
| return InvalidFormat; |
| } |
| |
| /// Handle __attribute__((init_priority(priority))) attributes based on |
| /// http://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Attributes.html |
| static void HandleInitPriorityAttr(Decl *d, const AttributeList &Attr, |
| Sema &S) { |
| if (!S.getLangOptions().CPlusPlus) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << Attr.getName(); |
| return; |
| } |
| |
| if (!isa<VarDecl>(d) || S.getCurFunctionOrMethodDecl()) { |
| S.Diag(Attr.getLoc(), diag::err_init_priority_object_attr); |
| Attr.setInvalid(); |
| return; |
| } |
| QualType T = dyn_cast<VarDecl>(d)->getType(); |
| if (S.Context.getAsArrayType(T)) |
| T = S.Context.getBaseElementType(T); |
| if (!T->getAs<RecordType>()) { |
| S.Diag(Attr.getLoc(), diag::err_init_priority_object_attr); |
| Attr.setInvalid(); |
| return; |
| } |
| |
| if (Attr.getNumArgs() != 1) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| Attr.setInvalid(); |
| return; |
| } |
| Expr *priorityExpr = static_cast<Expr *>(Attr.getArg(0)); |
| |
| llvm::APSInt priority(32); |
| if (priorityExpr->isTypeDependent() || priorityExpr->isValueDependent() || |
| !priorityExpr->isIntegerConstantExpr(priority, S.Context)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int) |
| << "init_priority" << priorityExpr->getSourceRange(); |
| Attr.setInvalid(); |
| return; |
| } |
| unsigned prioritynum = priority.getZExtValue(); |
| if (prioritynum < 101 || prioritynum > 65535) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_outof_range) |
| << priorityExpr->getSourceRange(); |
| Attr.setInvalid(); |
| return; |
| } |
| d->addAttr(::new (S.Context) InitPriorityAttr(Attr.getLoc(), S.Context, prioritynum)); |
| } |
| |
| /// Handle __attribute__((format(type,idx,firstarg))) attributes based on |
| /// http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html |
| static void HandleFormatAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| |
| if (!Attr.getParameterName()) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string) |
| << "format" << 1; |
| return; |
| } |
| |
| if (Attr.getNumArgs() != 2) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 3; |
| return; |
| } |
| |
| if (!isFunctionOrMethodOrBlock(d) || !hasFunctionProto(d)) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 0 /*function*/; |
| return; |
| } |
| |
| unsigned NumArgs = getFunctionOrMethodNumArgs(d); |
| unsigned FirstIdx = 1; |
| |
| llvm::StringRef Format = Attr.getParameterName()->getName(); |
| |
| // Normalize the argument, __foo__ becomes foo. |
| if (Format.startswith("__") && Format.endswith("__")) |
| Format = Format.substr(2, Format.size() - 4); |
| |
| // Check for supported formats. |
| FormatAttrKind Kind = getFormatAttrKind(Format); |
| |
| if (Kind == IgnoredFormat) |
| return; |
| |
| if (Kind == InvalidFormat) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_type_not_supported) |
| << "format" << Attr.getParameterName()->getName(); |
| return; |
| } |
| |
| // checks for the 2nd argument |
| Expr *IdxExpr = static_cast<Expr *>(Attr.getArg(0)); |
| llvm::APSInt Idx(32); |
| if (IdxExpr->isTypeDependent() || IdxExpr->isValueDependent() || |
| !IdxExpr->isIntegerConstantExpr(Idx, S.Context)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int) |
| << "format" << 2 << IdxExpr->getSourceRange(); |
| return; |
| } |
| |
| // FIXME: We should handle the implicit 'this' parameter in a more generic |
| // way that can be used for other arguments. |
| bool HasImplicitThisParam = false; |
| if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(d)) { |
| if (MD->isInstance()) { |
| HasImplicitThisParam = true; |
| NumArgs++; |
| } |
| } |
| |
| if (Idx.getZExtValue() < FirstIdx || Idx.getZExtValue() > NumArgs) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_out_of_bounds) |
| << "format" << 2 << IdxExpr->getSourceRange(); |
| return; |
| } |
| |
| // FIXME: Do we need to bounds check? |
| unsigned ArgIdx = Idx.getZExtValue() - 1; |
| |
| if (HasImplicitThisParam) { |
| if (ArgIdx == 0) { |
| S.Diag(Attr.getLoc(), diag::err_format_attribute_not) |
| << "a string type" << IdxExpr->getSourceRange(); |
| return; |
| } |
| ArgIdx--; |
| } |
| |
| // make sure the format string is really a string |
| QualType Ty = getFunctionOrMethodArgType(d, ArgIdx); |
| |
| if (Kind == CFStringFormat) { |
| if (!isCFStringType(Ty, S.Context)) { |
| S.Diag(Attr.getLoc(), diag::err_format_attribute_not) |
| << "a CFString" << IdxExpr->getSourceRange(); |
| return; |
| } |
| } else if (Kind == NSStringFormat) { |
| // FIXME: do we need to check if the type is NSString*? What are the |
| // semantics? |
| if (!isNSStringType(Ty, S.Context)) { |
| // FIXME: Should highlight the actual expression that has the wrong type. |
| S.Diag(Attr.getLoc(), diag::err_format_attribute_not) |
| << "an NSString" << IdxExpr->getSourceRange(); |
| return; |
| } |
| } else if (!Ty->isPointerType() || |
| !Ty->getAs<PointerType>()->getPointeeType()->isCharType()) { |
| // FIXME: Should highlight the actual expression that has the wrong type. |
| S.Diag(Attr.getLoc(), diag::err_format_attribute_not) |
| << "a string type" << IdxExpr->getSourceRange(); |
| return; |
| } |
| |
| // check the 3rd argument |
| Expr *FirstArgExpr = static_cast<Expr *>(Attr.getArg(1)); |
| llvm::APSInt FirstArg(32); |
| if (FirstArgExpr->isTypeDependent() || FirstArgExpr->isValueDependent() || |
| !FirstArgExpr->isIntegerConstantExpr(FirstArg, S.Context)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int) |
| << "format" << 3 << FirstArgExpr->getSourceRange(); |
| return; |
| } |
| |
| // check if the function is variadic if the 3rd argument non-zero |
| if (FirstArg != 0) { |
| if (isFunctionOrMethodVariadic(d)) { |
| ++NumArgs; // +1 for ... |
| } else { |
| S.Diag(d->getLocation(), diag::err_format_attribute_requires_variadic); |
| return; |
| } |
| } |
| |
| // strftime requires FirstArg to be 0 because it doesn't read from any |
| // variable the input is just the current time + the format string. |
| if (Kind == StrftimeFormat) { |
| if (FirstArg != 0) { |
| S.Diag(Attr.getLoc(), diag::err_format_strftime_third_parameter) |
| << FirstArgExpr->getSourceRange(); |
| return; |
| } |
| // if 0 it disables parameter checking (to use with e.g. va_list) |
| } else if (FirstArg != 0 && FirstArg != NumArgs) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_out_of_bounds) |
| << "format" << 3 << FirstArgExpr->getSourceRange(); |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) FormatAttr(Attr.getLoc(), S.Context, Format, |
| Idx.getZExtValue(), |
| FirstArg.getZExtValue())); |
| } |
| |
| static void HandleTransparentUnionAttr(Decl *d, const AttributeList &Attr, |
| Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| // Try to find the underlying union declaration. |
| RecordDecl *RD = 0; |
| TypedefDecl *TD = dyn_cast<TypedefDecl>(d); |
| if (TD && TD->getUnderlyingType()->isUnionType()) |
| RD = TD->getUnderlyingType()->getAsUnionType()->getDecl(); |
| else |
| RD = dyn_cast<RecordDecl>(d); |
| |
| if (!RD || !RD->isUnion()) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 1 /*union*/; |
| return; |
| } |
| |
| if (!RD->isDefinition()) { |
| S.Diag(Attr.getLoc(), |
| diag::warn_transparent_union_attribute_not_definition); |
| return; |
| } |
| |
| RecordDecl::field_iterator Field = RD->field_begin(), |
| FieldEnd = RD->field_end(); |
| if (Field == FieldEnd) { |
| S.Diag(Attr.getLoc(), diag::warn_transparent_union_attribute_zero_fields); |
| return; |
| } |
| |
| FieldDecl *FirstField = *Field; |
| QualType FirstType = FirstField->getType(); |
| if (FirstType->hasFloatingRepresentation() || FirstType->isVectorType()) { |
| S.Diag(FirstField->getLocation(), |
| diag::warn_transparent_union_attribute_floating) |
| << FirstType->isVectorType() << FirstType; |
| return; |
| } |
| |
| uint64_t FirstSize = S.Context.getTypeSize(FirstType); |
| uint64_t FirstAlign = S.Context.getTypeAlign(FirstType); |
| for (; Field != FieldEnd; ++Field) { |
| QualType FieldType = Field->getType(); |
| if (S.Context.getTypeSize(FieldType) != FirstSize || |
| S.Context.getTypeAlign(FieldType) != FirstAlign) { |
| // Warn if we drop the attribute. |
| bool isSize = S.Context.getTypeSize(FieldType) != FirstSize; |
| unsigned FieldBits = isSize? S.Context.getTypeSize(FieldType) |
| : S.Context.getTypeAlign(FieldType); |
| S.Diag(Field->getLocation(), |
| diag::warn_transparent_union_attribute_field_size_align) |
| << isSize << Field->getDeclName() << FieldBits; |
| unsigned FirstBits = isSize? FirstSize : FirstAlign; |
| S.Diag(FirstField->getLocation(), |
| diag::note_transparent_union_first_field_size_align) |
| << isSize << FirstBits; |
| return; |
| } |
| } |
| |
| RD->addAttr(::new (S.Context) TransparentUnionAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleAnnotateAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 1) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| return; |
| } |
| Expr *ArgExpr = static_cast<Expr *>(Attr.getArg(0)); |
| StringLiteral *SE = dyn_cast<StringLiteral>(ArgExpr); |
| |
| // Make sure that there is a string literal as the annotation's single |
| // argument. |
| if (!SE) { |
| S.Diag(ArgExpr->getLocStart(), diag::err_attribute_not_string) <<"annotate"; |
| return; |
| } |
| d->addAttr(::new (S.Context) AnnotateAttr(Attr.getLoc(), S.Context, SE->getString())); |
| } |
| |
| static void HandleAlignedAttr(Decl *D, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() > 1) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| return; |
| } |
| |
| //FIXME: The C++0x version of this attribute has more limited applicabilty |
| // than GNU's, and should error out when it is used to specify a |
| // weaker alignment, rather than being silently ignored. |
| |
| if (Attr.getNumArgs() == 0) { |
| D->addAttr(::new (S.Context) AlignedAttr(Attr.getLoc(), S.Context, true, 0)); |
| return; |
| } |
| |
| S.AddAlignedAttr(Attr.getLoc(), D, static_cast<Expr *>(Attr.getArg(0))); |
| } |
| |
| void Sema::AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E) { |
| if (E->isTypeDependent() || E->isValueDependent()) { |
| // Save dependent expressions in the AST to be instantiated. |
| D->addAttr(::new (Context) AlignedAttr(AttrLoc, Context, true, E)); |
| return; |
| } |
| |
| // FIXME: Cache the number on the Attr object? |
| llvm::APSInt Alignment(32); |
| if (!E->isIntegerConstantExpr(Alignment, Context)) { |
| Diag(AttrLoc, diag::err_attribute_argument_not_int) |
| << "aligned" << E->getSourceRange(); |
| return; |
| } |
| if (!llvm::isPowerOf2_64(Alignment.getZExtValue())) { |
| Diag(AttrLoc, diag::err_attribute_aligned_not_power_of_two) |
| << E->getSourceRange(); |
| return; |
| } |
| |
| D->addAttr(::new (Context) AlignedAttr(AttrLoc, Context, true, E)); |
| } |
| |
| void Sema::AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *TS) { |
| // FIXME: Cache the number on the Attr object if non-dependent? |
| // FIXME: Perform checking of type validity |
| D->addAttr(::new (Context) AlignedAttr(AttrLoc, Context, false, TS)); |
| return; |
| } |
| |
| /// HandleModeAttr - This attribute modifies the width of a decl with primitive |
| /// type. |
| /// |
| /// Despite what would be logical, the mode attribute is a decl attribute, not a |
| /// type attribute: 'int ** __attribute((mode(HI))) *G;' tries to make 'G' be |
| /// HImode, not an intermediate pointer. |
| static void HandleModeAttr(Decl *D, const AttributeList &Attr, Sema &S) { |
| // This attribute isn't documented, but glibc uses it. It changes |
| // the width of an int or unsigned int to the specified size. |
| |
| // Check that there aren't any arguments |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| IdentifierInfo *Name = Attr.getParameterName(); |
| if (!Name) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_missing_parameter_name); |
| return; |
| } |
| |
| llvm::StringRef Str = Attr.getParameterName()->getName(); |
| |
| // Normalize the attribute name, __foo__ becomes foo. |
| if (Str.startswith("__") && Str.endswith("__")) |
| Str = Str.substr(2, Str.size() - 4); |
| |
| unsigned DestWidth = 0; |
| bool IntegerMode = true; |
| bool ComplexMode = false; |
| switch (Str.size()) { |
| case 2: |
| switch (Str[0]) { |
| case 'Q': DestWidth = 8; break; |
| case 'H': DestWidth = 16; break; |
| case 'S': DestWidth = 32; break; |
| case 'D': DestWidth = 64; break; |
| case 'X': DestWidth = 96; break; |
| case 'T': DestWidth = 128; break; |
| } |
| if (Str[1] == 'F') { |
| IntegerMode = false; |
| } else if (Str[1] == 'C') { |
| IntegerMode = false; |
| ComplexMode = true; |
| } else if (Str[1] != 'I') { |
| DestWidth = 0; |
| } |
| break; |
| case 4: |
| // FIXME: glibc uses 'word' to define register_t; this is narrower than a |
| // pointer on PIC16 and other embedded platforms. |
| if (Str == "word") |
| DestWidth = S.Context.Target.getPointerWidth(0); |
| else if (Str == "byte") |
| DestWidth = S.Context.Target.getCharWidth(); |
| break; |
| case 7: |
| if (Str == "pointer") |
| DestWidth = S.Context.Target.getPointerWidth(0); |
| break; |
| } |
| |
| QualType OldTy; |
| if (TypedefDecl *TD = dyn_cast<TypedefDecl>(D)) |
| OldTy = TD->getUnderlyingType(); |
| else if (ValueDecl *VD = dyn_cast<ValueDecl>(D)) |
| OldTy = VD->getType(); |
| else { |
| S.Diag(D->getLocation(), diag::err_attr_wrong_decl) |
| << "mode" << SourceRange(Attr.getLoc(), Attr.getLoc()); |
| return; |
| } |
| |
| if (!OldTy->getAs<BuiltinType>() && !OldTy->isComplexType()) |
| S.Diag(Attr.getLoc(), diag::err_mode_not_primitive); |
| else if (IntegerMode) { |
| if (!OldTy->isIntegralOrEnumerationType()) |
| S.Diag(Attr.getLoc(), diag::err_mode_wrong_type); |
| } else if (ComplexMode) { |
| if (!OldTy->isComplexType()) |
| S.Diag(Attr.getLoc(), diag::err_mode_wrong_type); |
| } else { |
| if (!OldTy->isFloatingType()) |
| S.Diag(Attr.getLoc(), diag::err_mode_wrong_type); |
| } |
| |
| // FIXME: Sync this with InitializePredefinedMacros; we need to match int8_t |
| // and friends, at least with glibc. |
| // FIXME: Make sure 32/64-bit integers don't get defined to types of the wrong |
| // width on unusual platforms. |
| // FIXME: Make sure floating-point mappings are accurate |
| // FIXME: Support XF and TF types |
| QualType NewTy; |
| switch (DestWidth) { |
| case 0: |
| S.Diag(Attr.getLoc(), diag::err_unknown_machine_mode) << Name; |
| return; |
| default: |
| S.Diag(Attr.getLoc(), diag::err_unsupported_machine_mode) << Name; |
| return; |
| case 8: |
| if (!IntegerMode) { |
| S.Diag(Attr.getLoc(), diag::err_unsupported_machine_mode) << Name; |
| return; |
| } |
| if (OldTy->isSignedIntegerType()) |
| NewTy = S.Context.SignedCharTy; |
| else |
| NewTy = S.Context.UnsignedCharTy; |
| break; |
| case 16: |
| if (!IntegerMode) { |
| S.Diag(Attr.getLoc(), diag::err_unsupported_machine_mode) << Name; |
| return; |
| } |
| if (OldTy->isSignedIntegerType()) |
| NewTy = S.Context.ShortTy; |
| else |
| NewTy = S.Context.UnsignedShortTy; |
| break; |
| case 32: |
| if (!IntegerMode) |
| NewTy = S.Context.FloatTy; |
| else if (OldTy->isSignedIntegerType()) |
| NewTy = S.Context.IntTy; |
| else |
| NewTy = S.Context.UnsignedIntTy; |
| break; |
| case 64: |
| if (!IntegerMode) |
| NewTy = S.Context.DoubleTy; |
| else if (OldTy->isSignedIntegerType()) |
| if (S.Context.Target.getLongWidth() == 64) |
| NewTy = S.Context.LongTy; |
| else |
| NewTy = S.Context.LongLongTy; |
| else |
| if (S.Context.Target.getLongWidth() == 64) |
| NewTy = S.Context.UnsignedLongTy; |
| else |
| NewTy = S.Context.UnsignedLongLongTy; |
| break; |
| case 96: |
| NewTy = S.Context.LongDoubleTy; |
| break; |
| case 128: |
| if (!IntegerMode) { |
| S.Diag(Attr.getLoc(), diag::err_unsupported_machine_mode) << Name; |
| return; |
| } |
| if (OldTy->isSignedIntegerType()) |
| NewTy = S.Context.Int128Ty; |
| else |
| NewTy = S.Context.UnsignedInt128Ty; |
| break; |
| } |
| |
| if (ComplexMode) { |
| NewTy = S.Context.getComplexType(NewTy); |
| } |
| |
| // Install the new type. |
| if (TypedefDecl *TD = dyn_cast<TypedefDecl>(D)) { |
| // FIXME: preserve existing source info. |
| TD->setTypeSourceInfo(S.Context.getTrivialTypeSourceInfo(NewTy)); |
| } else |
| cast<ValueDecl>(D)->setType(NewTy); |
| } |
| |
| static void HandleNoDebugAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() > 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| if (!isFunctionOrMethod(d)) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 0 /*function*/; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) NoDebugAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleNoInlineAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| if (!isa<FunctionDecl>(d)) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 0 /*function*/; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) NoInlineAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleNoInstrumentFunctionAttr(Decl *d, const AttributeList &Attr, |
| Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| if (!isa<FunctionDecl>(d)) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 0 /*function*/; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) NoInstrumentFunctionAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleGNUInlineAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| FunctionDecl *Fn = dyn_cast<FunctionDecl>(d); |
| if (Fn == 0) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 0 /*function*/; |
| return; |
| } |
| |
| if (!Fn->isInlineSpecified()) { |
| S.Diag(Attr.getLoc(), diag::warn_gnu_inline_attribute_requires_inline); |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) GNUInlineAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleCallConvAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // Diagnostic is emitted elsewhere: here we store the (valid) Attr |
| // in the Decl node for syntactic reasoning, e.g., pretty-printing. |
| assert(Attr.isInvalid() == false); |
| |
| switch (Attr.getKind()) { |
| case AttributeList::AT_fastcall: |
| d->addAttr(::new (S.Context) FastCallAttr(Attr.getLoc(), S.Context)); |
| return; |
| case AttributeList::AT_stdcall: |
| d->addAttr(::new (S.Context) StdCallAttr(Attr.getLoc(), S.Context)); |
| return; |
| case AttributeList::AT_thiscall: |
| d->addAttr(::new (S.Context) ThisCallAttr(Attr.getLoc(), S.Context)); |
| case AttributeList::AT_cdecl: |
| d->addAttr(::new (S.Context) CDeclAttr(Attr.getLoc(), S.Context)); |
| return; |
| default: |
| llvm_unreachable("unexpected attribute kind"); |
| return; |
| } |
| } |
| |
| static void HandleRegparmAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 1) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| return; |
| } |
| |
| if (!isFunctionOrMethod(d)) { |
| S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 0 /*function*/; |
| return; |
| } |
| |
| Expr *NumParamsExpr = static_cast<Expr *>(Attr.getArg(0)); |
| llvm::APSInt NumParams(32); |
| if (NumParamsExpr->isTypeDependent() || NumParamsExpr->isValueDependent() || |
| !NumParamsExpr->isIntegerConstantExpr(NumParams, S.Context)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int) |
| << "regparm" << NumParamsExpr->getSourceRange(); |
| return; |
| } |
| |
| if (S.Context.Target.getRegParmMax() == 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_regparm_wrong_platform) |
| << NumParamsExpr->getSourceRange(); |
| return; |
| } |
| |
| if (NumParams.getLimitedValue(255) > S.Context.Target.getRegParmMax()) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_regparm_invalid_number) |
| << S.Context.Target.getRegParmMax() << NumParamsExpr->getSourceRange(); |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) RegparmAttr(Attr.getLoc(), S.Context, |
| NumParams.getZExtValue())); |
| } |
| |
| static void HandleFinalAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| if (!isa<CXXRecordDecl>(d) |
| && (!isa<CXXMethodDecl>(d) || !cast<CXXMethodDecl>(d)->isVirtual())) { |
| S.Diag(Attr.getLoc(), |
| Attr.isCXX0XAttribute() ? diag::err_attribute_wrong_decl_type |
| : diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 7 /*virtual method or class*/; |
| return; |
| } |
| |
| // FIXME: Conform to C++0x redeclaration rules. |
| |
| if (d->getAttr<FinalAttr>()) { |
| S.Diag(Attr.getLoc(), diag::err_repeat_attribute) << "final"; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) FinalAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // C++0x member checking attributes |
| //===----------------------------------------------------------------------===// |
| |
| static void HandleBaseCheckAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| if (!isa<CXXRecordDecl>(d)) { |
| S.Diag(Attr.getLoc(), |
| Attr.isCXX0XAttribute() ? diag::err_attribute_wrong_decl_type |
| : diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 9 /*class*/; |
| return; |
| } |
| |
| if (d->getAttr<BaseCheckAttr>()) { |
| S.Diag(Attr.getLoc(), diag::err_repeat_attribute) << "base_check"; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) BaseCheckAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleHidingAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| if (!isa<RecordDecl>(d->getDeclContext())) { |
| // FIXME: It's not the type that's the problem |
| S.Diag(Attr.getLoc(), |
| Attr.isCXX0XAttribute() ? diag::err_attribute_wrong_decl_type |
| : diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 11 /*member*/; |
| return; |
| } |
| |
| // FIXME: Conform to C++0x redeclaration rules. |
| |
| if (d->getAttr<HidingAttr>()) { |
| S.Diag(Attr.getLoc(), diag::err_repeat_attribute) << "hiding"; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) HidingAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| static void HandleOverrideAttr(Decl *d, const AttributeList &Attr, Sema &S) { |
| if (Attr.getNumArgs() != 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; |
| return; |
| } |
| |
| if (!isa<CXXMethodDecl>(d) || !cast<CXXMethodDecl>(d)->isVirtual()) { |
| // FIXME: It's not the type that's the problem |
| S.Diag(Attr.getLoc(), |
| Attr.isCXX0XAttribute() ? diag::err_attribute_wrong_decl_type |
| : diag::warn_attribute_wrong_decl_type) |
| << Attr.getName() << 10 /*virtual method*/; |
| return; |
| } |
| |
| // FIXME: Conform to C++0x redeclaration rules. |
| |
| if (d->getAttr<OverrideAttr>()) { |
| S.Diag(Attr.getLoc(), diag::err_repeat_attribute) << "override"; |
| return; |
| } |
| |
| d->addAttr(::new (S.Context) OverrideAttr(Attr.getLoc(), S.Context)); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Checker-specific attribute handlers. |
| //===----------------------------------------------------------------------===// |
| |
| static void HandleNSReturnsRetainedAttr(Decl *d, const AttributeList &Attr, |
| Sema &S) { |
| |
| QualType RetTy; |
| |
| if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(d)) |
| RetTy = MD->getResultType(); |
| else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(d)) |
| RetTy = FD->getResultType(); |
| else { |
| SourceLocation L = Attr.getLoc(); |
| S.Diag(d->getLocStart(), diag::warn_attribute_wrong_decl_type) |
| << SourceRange(L, L) << Attr.getName() << 3 /* function or method */; |
| return; |
| } |
| |
| if (!(S.Context.isObjCNSObjectType(RetTy) || RetTy->getAs<PointerType>() |
| || RetTy->getAs<ObjCObjectPointerType>())) { |
| SourceLocation L = Attr.getLoc(); |
| S.Diag(d->getLocStart(), diag::warn_ns_attribute_wrong_return_type) |
| << SourceRange(L, L) << Attr.getName(); |
| return; |
| } |
| |
| switch (Attr.getKind()) { |
| default: |
| assert(0 && "invalid ownership attribute"); |
| return; |
| case AttributeList::AT_cf_returns_not_retained: |
| d->addAttr(::new (S.Context) CFReturnsNotRetainedAttr(Attr.getLoc(), S.Context)); |
| return; |
| case AttributeList::AT_ns_returns_not_retained: |
| d->addAttr(::new (S.Context) NSReturnsNotRetainedAttr(Attr.getLoc(), S.Context)); |
| return; |
| case AttributeList::AT_cf_returns_retained: |
| d->addAttr(::new (S.Context) CFReturnsRetainedAttr(Attr.getLoc(), S.Context)); |
| return; |
| case AttributeList::AT_ns_returns_retained: |
| d->addAttr(::new (S.Context) NSReturnsRetainedAttr(Attr.getLoc(), S.Context)); |
| return; |
| }; |
| } |
| |
| static bool isKnownDeclSpecAttr(const AttributeList &Attr) { |
| return Attr.getKind() == AttributeList::AT_dllimport || |
| Attr.getKind() == AttributeList::AT_dllexport; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Top Level Sema Entry Points |
| //===----------------------------------------------------------------------===// |
| |
| /// ProcessDeclAttribute - Apply the specific attribute to the specified decl if |
| /// the attribute applies to decls. If the attribute is a type attribute, just |
| /// silently ignore it if a GNU attribute. FIXME: Applying a C++0x attribute to |
| /// the wrong thing is illegal (C++0x [dcl.attr.grammar]/4). |
| static void ProcessDeclAttribute(Scope *scope, Decl *D, |
| const AttributeList &Attr, Sema &S) { |
| if (Attr.isInvalid()) |
| return; |
| |
| if (Attr.isDeclspecAttribute() && !isKnownDeclSpecAttr(Attr)) |
| // FIXME: Try to deal with other __declspec attributes! |
| return; |
| switch (Attr.getKind()) { |
| case AttributeList::AT_IBAction: HandleIBAction(D, Attr, S); break; |
| case AttributeList::AT_IBOutlet: HandleIBOutlet(D, Attr, S); break; |
| case AttributeList::AT_IBOutletCollection: |
| HandleIBOutletCollection(D, Attr, S); break; |
| case AttributeList::AT_address_space: |
| case AttributeList::AT_objc_gc: |
| case AttributeList::AT_vector_size: |
| // Ignore these, these are type attributes, handled by |
| // ProcessTypeAttributes. |
| break; |
| case AttributeList::AT_alias: HandleAliasAttr (D, Attr, S); break; |
| case AttributeList::AT_aligned: HandleAlignedAttr (D, Attr, S); break; |
| case AttributeList::AT_always_inline: |
| HandleAlwaysInlineAttr (D, Attr, S); break; |
| case AttributeList::AT_analyzer_noreturn: |
| HandleAnalyzerNoReturnAttr (D, Attr, S); break; |
| case AttributeList::AT_annotate: HandleAnnotateAttr (D, Attr, S); break; |
| case AttributeList::AT_base_check: HandleBaseCheckAttr (D, Attr, S); break; |
| case AttributeList::AT_carries_dependency: |
| HandleDependencyAttr (D, Attr, S); break; |
| case AttributeList::AT_constructor: HandleConstructorAttr (D, Attr, S); break; |
| case AttributeList::AT_deprecated: HandleDeprecatedAttr (D, Attr, S); break; |
| case AttributeList::AT_destructor: HandleDestructorAttr (D, Attr, S); break; |
| case AttributeList::AT_ext_vector_type: |
| HandleExtVectorTypeAttr(scope, D, Attr, S); |
| break; |
| case AttributeList::AT_final: HandleFinalAttr (D, Attr, S); break; |
| case AttributeList::AT_format: HandleFormatAttr (D, Attr, S); break; |
| case AttributeList::AT_format_arg: HandleFormatArgAttr (D, Attr, S); break; |
| case AttributeList::AT_gnu_inline: HandleGNUInlineAttr (D, Attr, S); break; |
| case AttributeList::AT_hiding: HandleHidingAttr (D, Attr, S); break; |
| case AttributeList::AT_mode: HandleModeAttr (D, Attr, S); break; |
| case AttributeList::AT_malloc: HandleMallocAttr (D, Attr, S); break; |
| case AttributeList::AT_nonnull: HandleNonNullAttr (D, Attr, S); break; |
| case AttributeList::AT_ownership_returns: |
| case AttributeList::AT_ownership_takes: |
| case AttributeList::AT_ownership_holds: |
| HandleOwnershipAttr (D, Attr, S); break; |
| case AttributeList::AT_noreturn: HandleNoReturnAttr (D, Attr, S); break; |
| case AttributeList::AT_nothrow: HandleNothrowAttr (D, Attr, S); break; |
| case AttributeList::AT_override: HandleOverrideAttr (D, Attr, S); break; |
| case AttributeList::AT_vecreturn: HandleVecReturnAttr (D, Attr, S); break; |
| |
| // Checker-specific. |
| case AttributeList::AT_ns_returns_not_retained: |
| case AttributeList::AT_cf_returns_not_retained: |
| case AttributeList::AT_ns_returns_retained: |
| case AttributeList::AT_cf_returns_retained: |
| HandleNSReturnsRetainedAttr(D, Attr, S); break; |
| |
| case AttributeList::AT_reqd_wg_size: |
| HandleReqdWorkGroupSize(D, Attr, S); break; |
| |
| case AttributeList::AT_init_priority: |
| HandleInitPriorityAttr(D, Attr, S); break; |
| |
| case AttributeList::AT_packed: HandlePackedAttr (D, Attr, S); break; |
| case AttributeList::AT_section: HandleSectionAttr (D, Attr, S); break; |
| case AttributeList::AT_unavailable: HandleUnavailableAttr (D, Attr, S); break; |
| case AttributeList::AT_unused: HandleUnusedAttr (D, Attr, S); break; |
| case AttributeList::AT_used: HandleUsedAttr (D, Attr, S); break; |
| case AttributeList::AT_visibility: HandleVisibilityAttr (D, Attr, S); break; |
| case AttributeList::AT_warn_unused_result: HandleWarnUnusedResult(D,Attr,S); |
| break; |
| case AttributeList::AT_weak: HandleWeakAttr (D, Attr, S); break; |
| case AttributeList::AT_weakref: HandleWeakRefAttr (D, Attr, S); break; |
| case AttributeList::AT_weak_import: HandleWeakImportAttr (D, Attr, S); break; |
| case AttributeList::AT_transparent_union: |
| HandleTransparentUnionAttr(D, Attr, S); |
| break; |
| case AttributeList::AT_objc_exception: |
| HandleObjCExceptionAttr(D, Attr, S); |
| break; |
| case AttributeList::AT_overloadable:HandleOverloadableAttr(D, Attr, S); break; |
| case AttributeList::AT_nsobject: HandleObjCNSObject (D, Attr, S); break; |
| case AttributeList::AT_blocks: HandleBlocksAttr (D, Attr, S); break; |
| case AttributeList::AT_sentinel: HandleSentinelAttr (D, Attr, S); break; |
| case AttributeList::AT_const: HandleConstAttr (D, Attr, S); break; |
| case AttributeList::AT_pure: HandlePureAttr (D, Attr, S); break; |
| case AttributeList::AT_cleanup: HandleCleanupAttr (D, Attr, S); break; |
| case AttributeList::AT_nodebug: HandleNoDebugAttr (D, Attr, S); break; |
| case AttributeList::AT_noinline: HandleNoInlineAttr (D, Attr, S); break; |
| case AttributeList::AT_regparm: HandleRegparmAttr (D, Attr, S); break; |
| case AttributeList::IgnoredAttribute: |
| // Just ignore |
| break; |
| case AttributeList::AT_no_instrument_function: // Interacts with -pg. |
| HandleNoInstrumentFunctionAttr(D, Attr, S); |
| break; |
| case AttributeList::AT_stdcall: |
| case AttributeList::AT_cdecl: |
| case AttributeList::AT_fastcall: |
| case AttributeList::AT_thiscall: |
| HandleCallConvAttr(D, Attr, S); |
| break; |
| default: |
| // Ask target about the attribute. |
| const TargetAttributesSema &TargetAttrs = S.getTargetAttributesSema(); |
| if (!TargetAttrs.ProcessDeclAttribute(scope, D, Attr, S)) |
| S.Diag(Attr.getLoc(), diag::warn_unknown_attribute_ignored) |
| << Attr.getName(); |
| break; |
| } |
| } |
| |
| /// ProcessDeclAttributeList - Apply all the decl attributes in the specified |
| /// attribute list to the specified decl, ignoring any type attributes. |
| void Sema::ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AttrList) { |
| for (const AttributeList* l = AttrList; l; l = l->getNext()) { |
| ProcessDeclAttribute(S, D, *l, *this); |
| } |
| |
| // GCC accepts |
| // static int a9 __attribute__((weakref)); |
| // but that looks really pointless. We reject it. |
| if (D->hasAttr<WeakRefAttr>() && !D->hasAttr<AliasAttr>()) { |
| Diag(AttrList->getLoc(), diag::err_attribute_weakref_without_alias) << |
| dyn_cast<NamedDecl>(D)->getNameAsString(); |
| return; |
| } |
| } |
| |
| /// DeclClonePragmaWeak - clone existing decl (maybe definition), |
| /// #pragma weak needs a non-definition decl and source may not have one |
| NamedDecl * Sema::DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II) { |
| assert(isa<FunctionDecl>(ND) || isa<VarDecl>(ND)); |
| NamedDecl *NewD = 0; |
| if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) { |
| NewD = FunctionDecl::Create(FD->getASTContext(), FD->getDeclContext(), |
| FD->getLocation(), DeclarationName(II), |
| FD->getType(), FD->getTypeSourceInfo()); |
| if (FD->getQualifier()) { |
| FunctionDecl *NewFD = cast<FunctionDecl>(NewD); |
| NewFD->setQualifierInfo(FD->getQualifier(), FD->getQualifierRange()); |
| } |
| } else if (VarDecl *VD = dyn_cast<VarDecl>(ND)) { |
| NewD = VarDecl::Create(VD->getASTContext(), VD->getDeclContext(), |
| VD->getLocation(), II, |
| VD->getType(), VD->getTypeSourceInfo(), |
| VD->getStorageClass(), |
| VD->getStorageClassAsWritten()); |
| if (VD->getQualifier()) { |
| VarDecl *NewVD = cast<VarDecl>(NewD); |
| NewVD->setQualifierInfo(VD->getQualifier(), VD->getQualifierRange()); |
| } |
| } |
| return NewD; |
| } |
| |
| /// DeclApplyPragmaWeak - A declaration (maybe definition) needs #pragma weak |
| /// applied to it, possibly with an alias. |
| void Sema::DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W) { |
| if (W.getUsed()) return; // only do this once |
| W.setUsed(true); |
| if (W.getAlias()) { // clone decl, impersonate __attribute(weak,alias(...)) |
| IdentifierInfo *NDId = ND->getIdentifier(); |
| NamedDecl *NewD = DeclClonePragmaWeak(ND, W.getAlias()); |
| NewD->addAttr(::new (Context) AliasAttr(W.getLocation(), Context, |
| NDId->getName())); |
| NewD->addAttr(::new (Context) WeakAttr(W.getLocation(), Context)); |
| WeakTopLevelDecl.push_back(NewD); |
| // FIXME: "hideous" code from Sema::LazilyCreateBuiltin |
| // to insert Decl at TU scope, sorry. |
| DeclContext *SavedContext = CurContext; |
| CurContext = Context.getTranslationUnitDecl(); |
| PushOnScopeChains(NewD, S); |
| CurContext = SavedContext; |
| } else { // just add weak to existing |
| ND->addAttr(::new (Context) WeakAttr(W.getLocation(), Context)); |
| } |
| } |
| |
| /// ProcessDeclAttributes - Given a declarator (PD) with attributes indicated in |
| /// it, apply them to D. This is a bit tricky because PD can have attributes |
| /// specified in many different places, and we need to find and apply them all. |
| void Sema::ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD) { |
| // Handle #pragma weak |
| if (NamedDecl *ND = dyn_cast<NamedDecl>(D)) { |
| if (ND->hasLinkage()) { |
| WeakInfo W = WeakUndeclaredIdentifiers.lookup(ND->getIdentifier()); |
| if (W != WeakInfo()) { |
| // Identifier referenced by #pragma weak before it was declared |
| DeclApplyPragmaWeak(S, ND, W); |
| WeakUndeclaredIdentifiers[ND->getIdentifier()] = W; |
| } |
| } |
| } |
| |
| // Apply decl attributes from the DeclSpec if present. |
| if (const AttributeList *Attrs = PD.getDeclSpec().getAttributes()) |
| ProcessDeclAttributeList(S, D, Attrs); |
| |
| // Walk the declarator structure, applying decl attributes that were in a type |
| // position to the decl itself. This handles cases like: |
| // int *__attr__(x)** D; |
| // when X is a decl attribute. |
| for (unsigned i = 0, e = PD.getNumTypeObjects(); i != e; ++i) |
| if (const AttributeList *Attrs = PD.getTypeObject(i).getAttrs()) |
| ProcessDeclAttributeList(S, D, Attrs); |
| |
| // Finally, apply any attributes on the decl itself. |
| if (const AttributeList *Attrs = PD.getAttributes()) |
| ProcessDeclAttributeList(S, D, Attrs); |
| } |
| |
| /// PushParsingDeclaration - Enter a new "scope" of deprecation |
| /// warnings. |
| /// |
| /// The state token we use is the start index of this scope |
| /// on the warning stack. |
| Action::ParsingDeclStackState Sema::PushParsingDeclaration() { |
| ParsingDeclDepth++; |
| return (ParsingDeclStackState) DelayedDiagnostics.size(); |
| } |
| |
| void Sema::PopParsingDeclaration(ParsingDeclStackState S, Decl *D) { |
| assert(ParsingDeclDepth > 0 && "empty ParsingDeclaration stack"); |
| ParsingDeclDepth--; |
| |
| if (DelayedDiagnostics.empty()) |
| return; |
| |
| unsigned SavedIndex = (unsigned) S; |
| assert(SavedIndex <= DelayedDiagnostics.size() && |
| "saved index is out of bounds"); |
| |
| unsigned E = DelayedDiagnostics.size(); |
| |
| // We only want to actually emit delayed diagnostics when we |
| // successfully parsed a decl. |
| if (D) { |
| // We really do want to start with 0 here. We get one push for a |
| // decl spec and another for each declarator; in a decl group like: |
| // deprecated_typedef foo, *bar, baz(); |
| // only the declarator pops will be passed decls. This is correct; |
| // we really do need to consider delayed diagnostics from the decl spec |
| // for each of the different declarations. |
| for (unsigned I = 0; I != E; ++I) { |
| if (DelayedDiagnostics[I].Triggered) |
| continue; |
| |
| switch (DelayedDiagnostics[I].Kind) { |
| case DelayedDiagnostic::Deprecation: |
| HandleDelayedDeprecationCheck(DelayedDiagnostics[I], D); |
| break; |
| |
| case DelayedDiagnostic::Access: |
| HandleDelayedAccessCheck(DelayedDiagnostics[I], D); |
| break; |
| } |
| } |
| } |
| |
| // Destroy all the delayed diagnostics we're about to pop off. |
| for (unsigned I = SavedIndex; I != E; ++I) |
| DelayedDiagnostics[I].destroy(); |
| |
| DelayedDiagnostics.set_size(SavedIndex); |
| } |
| |
| static bool isDeclDeprecated(Decl *D) { |
| do { |
| if (D->hasAttr<DeprecatedAttr>()) |
| return true; |
| } while ((D = cast_or_null<Decl>(D->getDeclContext()))); |
| return false; |
| } |
| |
| void Sema::HandleDelayedDeprecationCheck(Sema::DelayedDiagnostic &DD, |
| Decl *Ctx) { |
| if (isDeclDeprecated(Ctx)) |
| return; |
| |
| DD.Triggered = true; |
| Diag(DD.Loc, diag::warn_deprecated) |
| << DD.DeprecationData.Decl->getDeclName(); |
| } |
| |
| void Sema::EmitDeprecationWarning(NamedDecl *D, SourceLocation Loc) { |
| // Delay if we're currently parsing a declaration. |
| if (ParsingDeclDepth) { |
| DelayedDiagnostics.push_back(DelayedDiagnostic::makeDeprecation(Loc, D)); |
| return; |
| } |
| |
| // Otherwise, don't warn if our current context is deprecated. |
| if (isDeclDeprecated(cast<Decl>(CurContext))) |
| return; |
| |
| Diag(Loc, diag::warn_deprecated) << D->getDeclName(); |
| } |