forked from OSchip/llvm-project
1982 lines
66 KiB
C++
1982 lines
66 KiB
C++
//===--- SemaDeclAttr.cpp - Declaration Attribute Handling ----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements decl-related attribute processing.
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//
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//===----------------------------------------------------------------------===//
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#include "Sema.h"
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#include "TargetAttributesSema.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/DeclObjC.h"
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#include "clang/AST/Expr.h"
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#include "clang/Basic/TargetInfo.h"
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#include "clang/Parse/DeclSpec.h"
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#include "llvm/ADT/StringExtras.h"
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using namespace clang;
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//===----------------------------------------------------------------------===//
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// Helper functions
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//===----------------------------------------------------------------------===//
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static const FunctionType *getFunctionType(const Decl *d,
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bool blocksToo = true) {
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QualType Ty;
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if (const ValueDecl *decl = dyn_cast<ValueDecl>(d))
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Ty = decl->getType();
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else if (const FieldDecl *decl = dyn_cast<FieldDecl>(d))
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Ty = decl->getType();
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else if (const TypedefDecl* decl = dyn_cast<TypedefDecl>(d))
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Ty = decl->getUnderlyingType();
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else
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return 0;
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if (Ty->isFunctionPointerType())
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Ty = Ty->getAs<PointerType>()->getPointeeType();
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else if (blocksToo && Ty->isBlockPointerType())
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Ty = Ty->getAs<BlockPointerType>()->getPointeeType();
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return Ty->getAs<FunctionType>();
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}
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// FIXME: We should provide an abstraction around a method or function
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// to provide the following bits of information.
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/// isFunction - Return true if the given decl has function
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/// type (function or function-typed variable).
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static bool isFunction(const Decl *d) {
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return getFunctionType(d, false) != NULL;
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}
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/// isFunctionOrMethod - Return true if the given decl has function
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/// type (function or function-typed variable) or an Objective-C
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/// method.
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static bool isFunctionOrMethod(const Decl *d) {
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return isFunction(d)|| isa<ObjCMethodDecl>(d);
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}
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/// isFunctionOrMethodOrBlock - Return true if the given decl has function
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/// type (function or function-typed variable) or an Objective-C
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/// method or a block.
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static bool isFunctionOrMethodOrBlock(const Decl *d) {
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if (isFunctionOrMethod(d))
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return true;
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// check for block is more involved.
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if (const VarDecl *V = dyn_cast<VarDecl>(d)) {
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QualType Ty = V->getType();
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return Ty->isBlockPointerType();
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}
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return isa<BlockDecl>(d);
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}
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/// hasFunctionProto - Return true if the given decl has a argument
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/// information. This decl should have already passed
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/// isFunctionOrMethod or isFunctionOrMethodOrBlock.
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static bool hasFunctionProto(const Decl *d) {
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if (const FunctionType *FnTy = getFunctionType(d))
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return isa<FunctionProtoType>(FnTy);
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else {
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assert(isa<ObjCMethodDecl>(d) || isa<BlockDecl>(d));
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return true;
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}
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}
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/// getFunctionOrMethodNumArgs - Return number of function or method
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/// arguments. It is an error to call this on a K&R function (use
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/// hasFunctionProto first).
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static unsigned getFunctionOrMethodNumArgs(const Decl *d) {
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if (const FunctionType *FnTy = getFunctionType(d))
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return cast<FunctionProtoType>(FnTy)->getNumArgs();
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if (const BlockDecl *BD = dyn_cast<BlockDecl>(d))
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return BD->getNumParams();
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return cast<ObjCMethodDecl>(d)->param_size();
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}
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static QualType getFunctionOrMethodArgType(const Decl *d, unsigned Idx) {
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if (const FunctionType *FnTy = getFunctionType(d))
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return cast<FunctionProtoType>(FnTy)->getArgType(Idx);
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if (const BlockDecl *BD = dyn_cast<BlockDecl>(d))
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return BD->getParamDecl(Idx)->getType();
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return cast<ObjCMethodDecl>(d)->param_begin()[Idx]->getType();
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}
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static QualType getFunctionOrMethodResultType(const Decl *d) {
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if (const FunctionType *FnTy = getFunctionType(d))
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return cast<FunctionProtoType>(FnTy)->getResultType();
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return cast<ObjCMethodDecl>(d)->getResultType();
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}
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static bool isFunctionOrMethodVariadic(const Decl *d) {
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if (const FunctionType *FnTy = getFunctionType(d)) {
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const FunctionProtoType *proto = cast<FunctionProtoType>(FnTy);
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return proto->isVariadic();
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} else if (const BlockDecl *BD = dyn_cast<BlockDecl>(d))
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return BD->IsVariadic();
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else {
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return cast<ObjCMethodDecl>(d)->isVariadic();
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}
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}
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static inline bool isNSStringType(QualType T, ASTContext &Ctx) {
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const ObjCObjectPointerType *PT = T->getAs<ObjCObjectPointerType>();
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if (!PT)
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return false;
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const ObjCInterfaceType *ClsT =PT->getPointeeType()->getAs<ObjCInterfaceType>();
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if (!ClsT)
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return false;
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IdentifierInfo* ClsName = ClsT->getDecl()->getIdentifier();
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// FIXME: Should we walk the chain of classes?
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return ClsName == &Ctx.Idents.get("NSString") ||
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ClsName == &Ctx.Idents.get("NSMutableString");
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}
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static inline bool isCFStringType(QualType T, ASTContext &Ctx) {
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const PointerType *PT = T->getAs<PointerType>();
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if (!PT)
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return false;
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const RecordType *RT = PT->getPointeeType()->getAs<RecordType>();
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if (!RT)
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return false;
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const RecordDecl *RD = RT->getDecl();
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if (RD->getTagKind() != TagDecl::TK_struct)
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return false;
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return RD->getIdentifier() == &Ctx.Idents.get("__CFString");
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}
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//===----------------------------------------------------------------------===//
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// Attribute Implementations
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//===----------------------------------------------------------------------===//
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// FIXME: All this manual attribute parsing code is gross. At the
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// least add some helper functions to check most argument patterns (#
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// and types of args).
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static void HandleExtVectorTypeAttr(Scope *scope, Decl *d,
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const AttributeList &Attr, Sema &S) {
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TypedefDecl *tDecl = dyn_cast<TypedefDecl>(d);
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if (tDecl == 0) {
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S.Diag(Attr.getLoc(), diag::err_typecheck_ext_vector_not_typedef);
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return;
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}
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QualType curType = tDecl->getUnderlyingType();
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Expr *sizeExpr;
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// Special case where the argument is a template id.
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if (Attr.getParameterName()) {
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CXXScopeSpec SS;
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UnqualifiedId id;
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id.setIdentifier(Attr.getParameterName(), Attr.getLoc());
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sizeExpr = S.ActOnIdExpression(scope, SS, id, false, false).takeAs<Expr>();
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} else {
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// check the attribute arguments.
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if (Attr.getNumArgs() != 1) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
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return;
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}
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sizeExpr = static_cast<Expr *>(Attr.getArg(0));
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}
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// Instantiate/Install the vector type, and let Sema build the type for us.
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// This will run the reguired checks.
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QualType T = S.BuildExtVectorType(curType, S.Owned(sizeExpr), Attr.getLoc());
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if (!T.isNull()) {
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// FIXME: preserve the old source info.
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tDecl->setTypeSourceInfo(S.Context.getTrivialTypeSourceInfo(T));
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// Remember this typedef decl, we will need it later for diagnostics.
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S.ExtVectorDecls.push_back(tDecl);
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}
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}
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static void HandlePackedAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs() > 0) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
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return;
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}
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if (TagDecl *TD = dyn_cast<TagDecl>(d))
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TD->addAttr(::new (S.Context) PackedAttr);
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else if (FieldDecl *FD = dyn_cast<FieldDecl>(d)) {
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// If the alignment is less than or equal to 8 bits, the packed attribute
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// has no effect.
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if (!FD->getType()->isIncompleteType() &&
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S.Context.getTypeAlign(FD->getType()) <= 8)
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S.Diag(Attr.getLoc(), diag::warn_attribute_ignored_for_field_of_type)
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<< Attr.getName() << FD->getType();
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else
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FD->addAttr(::new (S.Context) PackedAttr);
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} else
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S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << Attr.getName();
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}
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static void HandleIBOutletAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs() > 0) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
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return;
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}
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// The IBOutlet attribute only applies to instance variables of Objective-C
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// classes.
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if (isa<ObjCIvarDecl>(d) || isa<ObjCPropertyDecl>(d))
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d->addAttr(::new (S.Context) IBOutletAttr());
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else
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S.Diag(Attr.getLoc(), diag::err_attribute_iboutlet);
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}
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static void HandleNonNullAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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// GCC ignores the nonnull attribute on K&R style function prototypes, so we
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// ignore it as well
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if (!isFunctionOrMethod(d) || !hasFunctionProto(d)) {
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S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
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<< Attr.getName() << 0 /*function*/;
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return;
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}
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unsigned NumArgs = getFunctionOrMethodNumArgs(d);
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// The nonnull attribute only applies to pointers.
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llvm::SmallVector<unsigned, 10> NonNullArgs;
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for (AttributeList::arg_iterator I=Attr.arg_begin(),
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E=Attr.arg_end(); I!=E; ++I) {
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// The argument must be an integer constant expression.
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Expr *Ex = static_cast<Expr *>(*I);
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llvm::APSInt ArgNum(32);
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if (!Ex->isIntegerConstantExpr(ArgNum, S.Context)) {
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S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int)
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<< "nonnull" << Ex->getSourceRange();
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return;
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}
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unsigned x = (unsigned) ArgNum.getZExtValue();
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if (x < 1 || x > NumArgs) {
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S.Diag(Attr.getLoc(), diag::err_attribute_argument_out_of_bounds)
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<< "nonnull" << I.getArgNum() << Ex->getSourceRange();
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return;
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}
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--x;
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// Is the function argument a pointer type?
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QualType T = getFunctionOrMethodArgType(d, x);
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if (!T->isAnyPointerType() && !T->isBlockPointerType()) {
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// FIXME: Should also highlight argument in decl.
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S.Diag(Attr.getLoc(), diag::err_nonnull_pointers_only)
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<< "nonnull" << Ex->getSourceRange();
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continue;
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}
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NonNullArgs.push_back(x);
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}
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// If no arguments were specified to __attribute__((nonnull)) then all pointer
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// arguments have a nonnull attribute.
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if (NonNullArgs.empty()) {
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for (unsigned I = 0, E = getFunctionOrMethodNumArgs(d); I != E; ++I) {
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QualType T = getFunctionOrMethodArgType(d, I);
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if (T->isAnyPointerType() || T->isBlockPointerType())
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NonNullArgs.push_back(I);
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}
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if (NonNullArgs.empty()) {
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S.Diag(Attr.getLoc(), diag::warn_attribute_nonnull_no_pointers);
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return;
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}
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}
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unsigned* start = &NonNullArgs[0];
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unsigned size = NonNullArgs.size();
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std::sort(start, start + size);
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d->addAttr(::new (S.Context) NonNullAttr(S.Context, start, size));
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}
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static void HandleAliasAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs() != 1) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
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return;
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}
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Expr *Arg = static_cast<Expr*>(Attr.getArg(0));
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Arg = Arg->IgnoreParenCasts();
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StringLiteral *Str = dyn_cast<StringLiteral>(Arg);
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if (Str == 0 || Str->isWide()) {
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S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string)
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<< "alias" << 1;
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return;
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}
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// FIXME: check if target symbol exists in current file
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d->addAttr(::new (S.Context) AliasAttr(S.Context, Str->getString()));
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}
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static void HandleAlwaysInlineAttr(Decl *d, const AttributeList &Attr,
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Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs() != 0) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
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return;
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}
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if (!isa<FunctionDecl>(d)) {
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S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
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<< Attr.getName() << 0 /*function*/;
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return;
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}
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d->addAttr(::new (S.Context) AlwaysInlineAttr());
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}
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static void HandleMallocAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs() != 0) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
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return;
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}
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if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(d)) {
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QualType RetTy = FD->getResultType();
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if (RetTy->isAnyPointerType() || RetTy->isBlockPointerType()) {
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d->addAttr(::new (S.Context) MallocAttr());
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return;
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}
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}
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S.Diag(Attr.getLoc(), diag::warn_attribute_malloc_pointer_only);
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}
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static bool HandleCommonNoReturnAttr(Decl *d, const AttributeList &Attr,
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Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs() != 0) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
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return false;
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}
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if (!isFunctionOrMethod(d) && !isa<BlockDecl>(d)) {
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ValueDecl *VD = dyn_cast<ValueDecl>(d);
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if (VD == 0 || (!VD->getType()->isBlockPointerType()
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&& !VD->getType()->isFunctionPointerType())) {
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S.Diag(Attr.getLoc(),
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Attr.isCXX0XAttribute() ? diag::err_attribute_wrong_decl_type
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: diag::warn_attribute_wrong_decl_type)
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<< Attr.getName() << 0 /*function*/;
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return false;
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}
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}
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return true;
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}
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static void HandleNoReturnAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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// Don't apply as a decl attribute to ValueDecl.
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// FIXME: probably ought to diagnose this.
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if (isa<ValueDecl>(d))
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return;
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if (HandleCommonNoReturnAttr(d, Attr, S))
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d->addAttr(::new (S.Context) NoReturnAttr());
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}
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static void HandleAnalyzerNoReturnAttr(Decl *d, const AttributeList &Attr,
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Sema &S) {
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if (HandleCommonNoReturnAttr(d, Attr, S))
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d->addAttr(::new (S.Context) AnalyzerNoReturnAttr());
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}
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static void HandleDependencyAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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if (!isFunctionOrMethod(d) && !isa<ParmVarDecl>(d)) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_decl_type)
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<< Attr.getName() << 8 /*function, method, or parameter*/;
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return;
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}
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// FIXME: Actually store the attribute on the declaration
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}
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static void HandleUnusedAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs() != 0) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
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return;
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}
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if (!isa<VarDecl>(d) && !isFunctionOrMethod(d)) {
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S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
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<< Attr.getName() << 2 /*variable and function*/;
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return;
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}
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d->addAttr(::new (S.Context) UnusedAttr());
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}
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static void HandleUsedAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs() != 0) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
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return;
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}
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if (const VarDecl *VD = dyn_cast<VarDecl>(d)) {
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if (VD->hasLocalStorage() || VD->hasExternalStorage()) {
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S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "used";
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return;
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}
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} else if (!isFunctionOrMethod(d)) {
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S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
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<< Attr.getName() << 2 /*variable and function*/;
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return;
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}
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d->addAttr(::new (S.Context) UsedAttr());
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}
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static void HandleConstructorAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs() != 0 && Attr.getNumArgs() != 1) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments)
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<< "0 or 1";
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return;
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}
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int priority = 65535; // FIXME: Do not hardcode such constants.
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if (Attr.getNumArgs() > 0) {
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Expr *E = static_cast<Expr *>(Attr.getArg(0));
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llvm::APSInt Idx(32);
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if (!E->isIntegerConstantExpr(Idx, S.Context)) {
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S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int)
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<< "constructor" << 1 << E->getSourceRange();
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return;
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}
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priority = Idx.getZExtValue();
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}
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if (!isa<FunctionDecl>(d)) {
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S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
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<< Attr.getName() << 0 /*function*/;
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return;
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}
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d->addAttr(::new (S.Context) ConstructorAttr(priority));
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}
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static void HandleDestructorAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs() != 0 && Attr.getNumArgs() != 1) {
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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->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(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());
|
|
}
|
|
|
|
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());
|
|
}
|
|
|
|
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::VisibilityTypes type;
|
|
|
|
if (TypeStr == "default")
|
|
type = VisibilityAttr::DefaultVisibility;
|
|
else if (TypeStr == "hidden")
|
|
type = VisibilityAttr::HiddenVisibility;
|
|
else if (TypeStr == "internal")
|
|
type = VisibilityAttr::HiddenVisibility; // FIXME
|
|
else if (TypeStr == "protected")
|
|
type = VisibilityAttr::ProtectedVisibility;
|
|
else {
|
|
S.Diag(Attr.getLoc(), diag::warn_attribute_unknown_visibility) << TypeStr;
|
|
return;
|
|
}
|
|
|
|
d->addAttr(::new (S.Context) VisibilityAttr(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());
|
|
}
|
|
|
|
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());
|
|
}
|
|
|
|
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());
|
|
}
|
|
|
|
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::BlocksAttrTypes 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(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->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->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(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 (!isFunctionOrMethod(D)) {
|
|
S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
|
|
<< Attr.getName() << 0 /*function*/;
|
|
return;
|
|
}
|
|
|
|
if (getFunctionType(D)->getResultType()->isVoidType()) {
|
|
S.Diag(Attr.getLoc(), diag::warn_attribute_void_function)
|
|
<< Attr.getName();
|
|
return;
|
|
}
|
|
|
|
D->addAttr(::new (S.Context) WarnUnusedResultAttr());
|
|
}
|
|
|
|
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 */
|
|
bool isStatic = false;
|
|
if (VarDecl *VD = dyn_cast<VarDecl>(D)) {
|
|
isStatic = VD->getStorageClass() == VarDecl::Static;
|
|
} else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
|
|
isStatic = FD->getStorageClass() == FunctionDecl::Static;
|
|
}
|
|
if (isStatic) {
|
|
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());
|
|
}
|
|
|
|
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->getBody();
|
|
} 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))) {
|
|
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());
|
|
}
|
|
|
|
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->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(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(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());
|
|
}
|
|
|
|
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());
|
|
}
|
|
|
|
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());
|
|
}
|
|
|
|
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
|
|
NamedDecl *CleanupDecl
|
|
= S.LookupSingleName(S.TUScope, Attr.getParameterName(),
|
|
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(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->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(Idx.getZExtValue()));
|
|
}
|
|
|
|
enum FormatAttrKind {
|
|
CFStringFormat,
|
|
NSStringFormat,
|
|
StrftimeFormat,
|
|
SupportedFormat,
|
|
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;
|
|
|
|
return InvalidFormat;
|
|
}
|
|
|
|
/// 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 == 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->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->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(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->isFloatingType() || FirstType->isVectorType()) {
|
|
S.Diag(FirstField->getLocation(),
|
|
diag::warn_transparent_union_attribute_floating);
|
|
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());
|
|
}
|
|
|
|
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(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.
|
|
|
|
unsigned Align = 0;
|
|
if (Attr.getNumArgs() == 0) {
|
|
// FIXME: This should be the target specific maximum alignment.
|
|
// (For now we just use 128 bits which is the maximum on X86).
|
|
Align = 128;
|
|
d->addAttr(::new (S.Context) AlignedAttr(Align));
|
|
return;
|
|
}
|
|
|
|
Expr *alignmentExpr = static_cast<Expr *>(Attr.getArg(0));
|
|
llvm::APSInt Alignment(32);
|
|
if (!alignmentExpr->isIntegerConstantExpr(Alignment, S.Context)) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int)
|
|
<< "aligned" << alignmentExpr->getSourceRange();
|
|
return;
|
|
}
|
|
if (!llvm::isPowerOf2_64(Alignment.getZExtValue())) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_aligned_not_power_of_two)
|
|
<< alignmentExpr->getSourceRange();
|
|
return;
|
|
}
|
|
|
|
d->addAttr(::new (S.Context) AlignedAttr(Alignment.getZExtValue() * 8));
|
|
}
|
|
|
|
/// 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->isIntegralType())
|
|
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());
|
|
}
|
|
|
|
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());
|
|
}
|
|
|
|
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());
|
|
}
|
|
|
|
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->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(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());
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// 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());
|
|
}
|
|
|
|
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());
|
|
}
|
|
|
|
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());
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// 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_retained:
|
|
d->addAttr(::new (S.Context) CFReturnsRetainedAttr());
|
|
return;
|
|
case AttributeList::AT_ns_returns_retained:
|
|
d->addAttr(::new (S.Context) NSReturnsRetainedAttr());
|
|
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.isDeclspecAttribute() && !isKnownDeclSpecAttr(Attr))
|
|
// FIXME: Try to deal with other __declspec attributes!
|
|
return;
|
|
switch (Attr.getKind()) {
|
|
case AttributeList::AT_IBOutlet: HandleIBOutletAttr (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_noreturn: HandleNoReturnAttr (D, Attr, S); break;
|
|
case AttributeList::AT_nothrow: HandleNothrowAttr (D, Attr, S); break;
|
|
case AttributeList::AT_override: HandleOverrideAttr (D, Attr, S); break;
|
|
|
|
// Checker-specific.
|
|
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_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_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:
|
|
case AttributeList::AT_no_instrument_function: // Interacts with -pg.
|
|
// Just ignore
|
|
break;
|
|
case AttributeList::AT_stdcall:
|
|
case AttributeList::AT_cdecl:
|
|
case AttributeList::AT_fastcall:
|
|
// These are all treated as type attributes.
|
|
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_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) {
|
|
while (AttrList) {
|
|
ProcessDeclAttribute(S, D, *AttrList, *this);
|
|
AttrList = AttrList->getNext();
|
|
}
|
|
}
|
|
|
|
/// 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());
|
|
} else if (VarDecl *VD = dyn_cast<VarDecl>(ND)) {
|
|
NewD = VarDecl::Create(VD->getASTContext(), VD->getDeclContext(),
|
|
VD->getLocation(), II,
|
|
VD->getType(), VD->getTypeSourceInfo(),
|
|
VD->getStorageClass());
|
|
}
|
|
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(Context, NDId->getName()));
|
|
NewD->addAttr(::new (Context) WeakAttr());
|
|
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());
|
|
}
|
|
}
|
|
|
|
/// 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
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|
/// warnings.
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///
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/// The state token we use is the start index of this scope
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|
/// on the warning stack.
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|
Action::ParsingDeclStackState Sema::PushParsingDeclaration() {
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|
ParsingDeclDepth++;
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|
return (ParsingDeclStackState) DelayedDiagnostics.size();
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|
}
|
|
|
|
void Sema::PopParsingDeclaration(ParsingDeclStackState S, DeclPtrTy Ctx) {
|
|
assert(ParsingDeclDepth > 0 && "empty ParsingDeclaration stack");
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|
ParsingDeclDepth--;
|
|
|
|
if (DelayedDiagnostics.empty())
|
|
return;
|
|
|
|
unsigned SavedIndex = (unsigned) S;
|
|
assert(SavedIndex <= DelayedDiagnostics.size() &&
|
|
"saved index is out of bounds");
|
|
|
|
// We only want to actually emit delayed diagnostics when we
|
|
// successfully parsed a decl.
|
|
Decl *D = Ctx ? Ctx.getAs<Decl>() : 0;
|
|
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, E = DelayedDiagnostics.size(); 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;
|
|
}
|
|
}
|
|
}
|
|
|
|
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();
|
|
}
|