1 //===--- SemaDeclAttr.cpp - Declaration Attribute Handling ----------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements decl-related attribute processing.
12 //===----------------------------------------------------------------------===//
14 #include "clang/Sema/SemaInternal.h"
15 #include "TargetAttributesSema.h"
16 #include "clang/AST/ASTContext.h"
17 #include "clang/AST/CXXInheritance.h"
18 #include "clang/AST/DeclCXX.h"
19 #include "clang/AST/DeclTemplate.h"
20 #include "clang/AST/DeclObjC.h"
21 #include "clang/AST/Expr.h"
22 #include "clang/Basic/SourceManager.h"
23 #include "clang/Basic/TargetInfo.h"
24 #include "clang/Sema/DeclSpec.h"
25 #include "clang/Sema/DelayedDiagnostic.h"
26 #include "clang/Sema/Lookup.h"
27 #include "llvm/ADT/StringExtras.h"
28 using namespace clang;
31 /// These constants match the enumerated choices of
32 /// warn_attribute_wrong_decl_type and err_attribute_wrong_decl_type.
33 enum AttributeDeclKind {
36 ExpectedVariableOrFunction,
37 ExpectedFunctionOrMethod,
39 ExpectedFunctionMethodOrBlock,
40 ExpectedFunctionMethodOrParameter,
44 ExpectedVariableFunctionOrLabel,
45 ExpectedFieldOrGlobalVar,
50 //===----------------------------------------------------------------------===//
52 //===----------------------------------------------------------------------===//
54 static const FunctionType *getFunctionType(const Decl *D,
55 bool blocksToo = true) {
57 if (const ValueDecl *decl = dyn_cast<ValueDecl>(D))
59 else if (const FieldDecl *decl = dyn_cast<FieldDecl>(D))
61 else if (const TypedefNameDecl* decl = dyn_cast<TypedefNameDecl>(D))
62 Ty = decl->getUnderlyingType();
66 if (Ty->isFunctionPointerType())
67 Ty = Ty->getAs<PointerType>()->getPointeeType();
68 else if (blocksToo && Ty->isBlockPointerType())
69 Ty = Ty->getAs<BlockPointerType>()->getPointeeType();
71 return Ty->getAs<FunctionType>();
74 // FIXME: We should provide an abstraction around a method or function
75 // to provide the following bits of information.
77 /// isFunction - Return true if the given decl has function
78 /// type (function or function-typed variable).
79 static bool isFunction(const Decl *D) {
80 return getFunctionType(D, false) != NULL;
83 /// isFunctionOrMethod - Return true if the given decl has function
84 /// type (function or function-typed variable) or an Objective-C
86 static bool isFunctionOrMethod(const Decl *D) {
87 return isFunction(D) || isa<ObjCMethodDecl>(D);
90 /// isFunctionOrMethodOrBlock - Return true if the given decl has function
91 /// type (function or function-typed variable) or an Objective-C
92 /// method or a block.
93 static bool isFunctionOrMethodOrBlock(const Decl *D) {
94 if (isFunctionOrMethod(D))
96 // check for block is more involved.
97 if (const VarDecl *V = dyn_cast<VarDecl>(D)) {
98 QualType Ty = V->getType();
99 return Ty->isBlockPointerType();
101 return isa<BlockDecl>(D);
104 /// Return true if the given decl has a declarator that should have
105 /// been processed by Sema::GetTypeForDeclarator.
106 static bool hasDeclarator(const Decl *D) {
107 // In some sense, TypedefDecl really *ought* to be a DeclaratorDecl.
108 return isa<DeclaratorDecl>(D) || isa<BlockDecl>(D) || isa<TypedefNameDecl>(D) ||
109 isa<ObjCPropertyDecl>(D);
112 /// hasFunctionProto - Return true if the given decl has a argument
113 /// information. This decl should have already passed
114 /// isFunctionOrMethod or isFunctionOrMethodOrBlock.
115 static bool hasFunctionProto(const Decl *D) {
116 if (const FunctionType *FnTy = getFunctionType(D))
117 return isa<FunctionProtoType>(FnTy);
119 assert(isa<ObjCMethodDecl>(D) || isa<BlockDecl>(D));
124 /// getFunctionOrMethodNumArgs - Return number of function or method
125 /// arguments. It is an error to call this on a K&R function (use
126 /// hasFunctionProto first).
127 static unsigned getFunctionOrMethodNumArgs(const Decl *D) {
128 if (const FunctionType *FnTy = getFunctionType(D))
129 return cast<FunctionProtoType>(FnTy)->getNumArgs();
130 if (const BlockDecl *BD = dyn_cast<BlockDecl>(D))
131 return BD->getNumParams();
132 return cast<ObjCMethodDecl>(D)->param_size();
135 static QualType getFunctionOrMethodArgType(const Decl *D, unsigned Idx) {
136 if (const FunctionType *FnTy = getFunctionType(D))
137 return cast<FunctionProtoType>(FnTy)->getArgType(Idx);
138 if (const BlockDecl *BD = dyn_cast<BlockDecl>(D))
139 return BD->getParamDecl(Idx)->getType();
141 return cast<ObjCMethodDecl>(D)->param_begin()[Idx]->getType();
144 static QualType getFunctionOrMethodResultType(const Decl *D) {
145 if (const FunctionType *FnTy = getFunctionType(D))
146 return cast<FunctionProtoType>(FnTy)->getResultType();
147 return cast<ObjCMethodDecl>(D)->getResultType();
150 static bool isFunctionOrMethodVariadic(const Decl *D) {
151 if (const FunctionType *FnTy = getFunctionType(D)) {
152 const FunctionProtoType *proto = cast<FunctionProtoType>(FnTy);
153 return proto->isVariadic();
154 } else if (const BlockDecl *BD = dyn_cast<BlockDecl>(D))
155 return BD->isVariadic();
157 return cast<ObjCMethodDecl>(D)->isVariadic();
161 static bool isInstanceMethod(const Decl *D) {
162 if (const CXXMethodDecl *MethodDecl = dyn_cast<CXXMethodDecl>(D))
163 return MethodDecl->isInstance();
167 static inline bool isNSStringType(QualType T, ASTContext &Ctx) {
168 const ObjCObjectPointerType *PT = T->getAs<ObjCObjectPointerType>();
172 ObjCInterfaceDecl *Cls = PT->getObjectType()->getInterface();
176 IdentifierInfo* ClsName = Cls->getIdentifier();
178 // FIXME: Should we walk the chain of classes?
179 return ClsName == &Ctx.Idents.get("NSString") ||
180 ClsName == &Ctx.Idents.get("NSMutableString");
183 static inline bool isCFStringType(QualType T, ASTContext &Ctx) {
184 const PointerType *PT = T->getAs<PointerType>();
188 const RecordType *RT = PT->getPointeeType()->getAs<RecordType>();
192 const RecordDecl *RD = RT->getDecl();
193 if (RD->getTagKind() != TTK_Struct)
196 return RD->getIdentifier() == &Ctx.Idents.get("__CFString");
199 /// \brief Check if the attribute has exactly as many args as Num. May
201 static bool checkAttributeNumArgs(Sema &S, const AttributeList &Attr,
203 if (Attr.getNumArgs() != Num) {
204 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << Num;
212 /// \brief Check if the attribute has at least as many args as Num. May
214 static bool checkAttributeAtLeastNumArgs(Sema &S, const AttributeList &Attr,
216 if (Attr.getNumArgs() < Num) {
217 S.Diag(Attr.getLoc(), diag::err_attribute_too_few_arguments) << Num;
224 /// \brief Check if IdxExpr is a valid argument index for a function or
225 /// instance method D. May output an error.
227 /// \returns true if IdxExpr is a valid index.
228 static bool checkFunctionOrMethodArgumentIndex(Sema &S, const Decl *D,
230 SourceLocation AttrLoc,
235 assert(isFunctionOrMethod(D) && hasFunctionProto(D));
237 // In C++ the implicit 'this' function parameter also counts.
238 // Parameters are counted from one.
239 const bool HasImplicitThisParam = isInstanceMethod(D);
240 const unsigned NumArgs = getFunctionOrMethodNumArgs(D) + HasImplicitThisParam;
241 const unsigned FirstIdx = 1;
244 if (IdxExpr->isTypeDependent() || IdxExpr->isValueDependent() ||
245 !IdxExpr->isIntegerConstantExpr(IdxInt, S.Context)) {
246 S.Diag(AttrLoc, diag::err_attribute_argument_n_not_int)
247 << AttrName << AttrArgNum << IdxExpr->getSourceRange();
251 Idx = IdxInt.getLimitedValue();
252 if (Idx < FirstIdx || (!isFunctionOrMethodVariadic(D) && Idx > NumArgs)) {
253 S.Diag(AttrLoc, diag::err_attribute_argument_out_of_bounds)
254 << AttrName << AttrArgNum << IdxExpr->getSourceRange();
257 Idx--; // Convert to zero-based.
258 if (HasImplicitThisParam) {
261 diag::err_attribute_invalid_implicit_this_argument)
262 << AttrName << IdxExpr->getSourceRange();
272 /// \brief Check if passed in Decl is a field or potentially shared global var
273 /// \return true if the Decl is a field or potentially shared global variable
275 static bool mayBeSharedVariable(const Decl *D) {
276 if (isa<FieldDecl>(D))
278 if (const VarDecl *vd = dyn_cast<VarDecl>(D))
279 return (vd->hasGlobalStorage() && !(vd->isThreadSpecified()));
284 /// \brief Check if the passed-in expression is of type int or bool.
285 static bool isIntOrBool(Expr *Exp) {
286 QualType QT = Exp->getType();
287 return QT->isBooleanType() || QT->isIntegerType();
291 // Check to see if the type is a smart pointer of some kind. We assume
292 // it's a smart pointer if it defines both operator-> and operator*.
293 static bool threadSafetyCheckIsSmartPointer(Sema &S, const RecordType* RT) {
294 DeclContextLookupConstResult Res1 = RT->getDecl()->lookup(
295 S.Context.DeclarationNames.getCXXOperatorName(OO_Star));
296 if (Res1.first == Res1.second)
299 DeclContextLookupConstResult Res2 = RT->getDecl()->lookup(
300 S.Context.DeclarationNames.getCXXOperatorName(OO_Arrow));
301 if (Res2.first == Res2.second)
307 /// \brief Check if passed in Decl is a pointer type.
308 /// Note that this function may produce an error message.
309 /// \return true if the Decl is a pointer type; false otherwise
310 static bool threadSafetyCheckIsPointer(Sema &S, const Decl *D,
311 const AttributeList &Attr) {
312 if (const ValueDecl *vd = dyn_cast<ValueDecl>(D)) {
313 QualType QT = vd->getType();
314 if (QT->isAnyPointerType())
317 if (const RecordType *RT = QT->getAs<RecordType>()) {
318 // If it's an incomplete type, it could be a smart pointer; skip it.
319 // (We don't want to force template instantiation if we can avoid it,
320 // since that would alter the order in which templates are instantiated.)
321 if (RT->isIncompleteType())
324 if (threadSafetyCheckIsSmartPointer(S, RT))
328 S.Diag(Attr.getLoc(), diag::warn_thread_attribute_decl_not_pointer)
329 << Attr.getName()->getName() << QT;
331 S.Diag(Attr.getLoc(), diag::err_attribute_can_be_applied_only_to_value_decl)
337 /// \brief Checks that the passed in QualType either is of RecordType or points
338 /// to RecordType. Returns the relevant RecordType, null if it does not exit.
339 static const RecordType *getRecordType(QualType QT) {
340 if (const RecordType *RT = QT->getAs<RecordType>())
343 // Now check if we point to record type.
344 if (const PointerType *PT = QT->getAs<PointerType>())
345 return PT->getPointeeType()->getAs<RecordType>();
351 static bool checkBaseClassIsLockableCallback(const CXXBaseSpecifier *Specifier,
352 CXXBasePath &Path, void *Unused) {
353 const RecordType *RT = Specifier->getType()->getAs<RecordType>();
354 if (RT->getDecl()->getAttr<LockableAttr>())
360 /// \brief Thread Safety Analysis: Checks that the passed in RecordType
361 /// resolves to a lockable object.
362 static void checkForLockableRecord(Sema &S, Decl *D, const AttributeList &Attr,
364 const RecordType *RT = getRecordType(Ty);
366 // Warn if could not get record type for this argument.
368 S.Diag(Attr.getLoc(), diag::warn_thread_attribute_argument_not_class)
369 << Attr.getName() << Ty.getAsString();
373 // Don't check for lockable if the class hasn't been defined yet.
374 if (RT->isIncompleteType())
377 // Allow smart pointers to be used as lockable objects.
378 // FIXME -- Check the type that the smart pointer points to.
379 if (threadSafetyCheckIsSmartPointer(S, RT))
382 // Check if the type is lockable.
383 RecordDecl *RD = RT->getDecl();
384 if (RD->getAttr<LockableAttr>())
387 // Else check if any base classes are lockable.
388 if (CXXRecordDecl *CRD = dyn_cast<CXXRecordDecl>(RD)) {
389 CXXBasePaths BPaths(false, false);
390 if (CRD->lookupInBases(checkBaseClassIsLockableCallback, 0, BPaths))
394 S.Diag(Attr.getLoc(), diag::warn_thread_attribute_argument_not_lockable)
395 << Attr.getName() << Ty.getAsString();
398 /// \brief Thread Safety Analysis: Checks that all attribute arguments, starting
399 /// from Sidx, resolve to a lockable object.
400 /// \param Sidx The attribute argument index to start checking with.
401 /// \param ParamIdxOk Whether an argument can be indexing into a function
403 static void checkAttrArgsAreLockableObjs(Sema &S, Decl *D,
404 const AttributeList &Attr,
405 SmallVectorImpl<Expr*> &Args,
407 bool ParamIdxOk = false) {
408 for(unsigned Idx = Sidx; Idx < Attr.getNumArgs(); ++Idx) {
409 Expr *ArgExp = Attr.getArg(Idx);
411 if (ArgExp->isTypeDependent()) {
412 // FIXME -- need to check this again on template instantiation
413 Args.push_back(ArgExp);
417 if (StringLiteral *StrLit = dyn_cast<StringLiteral>(ArgExp)) {
418 // Ignore empty strings without warnings
419 if (StrLit->getLength() == 0)
422 // We allow constant strings to be used as a placeholder for expressions
423 // that are not valid C++ syntax, but warn that they are ignored.
424 S.Diag(Attr.getLoc(), diag::warn_thread_attribute_ignored) <<
429 QualType ArgTy = ArgExp->getType();
431 // A pointer to member expression of the form &MyClass::mu is treated
432 // specially -- we need to look at the type of the member.
433 if (UnaryOperator *UOp = dyn_cast<UnaryOperator>(ArgExp))
434 if (UOp->getOpcode() == UO_AddrOf)
435 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(UOp->getSubExpr()))
436 if (DRE->getDecl()->isCXXInstanceMember())
437 ArgTy = DRE->getDecl()->getType();
439 // First see if we can just cast to record type, or point to record type.
440 const RecordType *RT = getRecordType(ArgTy);
442 // Now check if we index into a record type function param.
443 if(!RT && ParamIdxOk) {
444 FunctionDecl *FD = dyn_cast<FunctionDecl>(D);
445 IntegerLiteral *IL = dyn_cast<IntegerLiteral>(ArgExp);
447 unsigned int NumParams = FD->getNumParams();
448 llvm::APInt ArgValue = IL->getValue();
449 uint64_t ParamIdxFromOne = ArgValue.getZExtValue();
450 uint64_t ParamIdxFromZero = ParamIdxFromOne - 1;
451 if(!ArgValue.isStrictlyPositive() || ParamIdxFromOne > NumParams) {
452 S.Diag(Attr.getLoc(), diag::err_attribute_argument_out_of_range)
453 << Attr.getName() << Idx + 1 << NumParams;
456 ArgTy = FD->getParamDecl(ParamIdxFromZero)->getType();
460 checkForLockableRecord(S, D, Attr, ArgTy);
462 Args.push_back(ArgExp);
466 //===----------------------------------------------------------------------===//
467 // Attribute Implementations
468 //===----------------------------------------------------------------------===//
470 // FIXME: All this manual attribute parsing code is gross. At the
471 // least add some helper functions to check most argument patterns (#
472 // and types of args).
474 enum ThreadAttributeDeclKind {
475 ThreadExpectedFieldOrGlobalVar,
476 ThreadExpectedFunctionOrMethod,
477 ThreadExpectedClassOrStruct
480 static bool checkGuardedVarAttrCommon(Sema &S, Decl *D,
481 const AttributeList &Attr) {
482 assert(!Attr.isInvalid());
484 if (!checkAttributeNumArgs(S, Attr, 0))
487 // D must be either a member field or global (potentially shared) variable.
488 if (!mayBeSharedVariable(D)) {
489 S.Diag(Attr.getLoc(), diag::warn_thread_attribute_wrong_decl_type)
490 << Attr.getName() << ThreadExpectedFieldOrGlobalVar;
497 static void handleGuardedVarAttr(Sema &S, Decl *D, const AttributeList &Attr) {
498 if (!checkGuardedVarAttrCommon(S, D, Attr))
501 D->addAttr(::new (S.Context) GuardedVarAttr(Attr.getRange(), S.Context));
504 static void handlePtGuardedVarAttr(Sema &S, Decl *D,
505 const AttributeList &Attr) {
506 if (!checkGuardedVarAttrCommon(S, D, Attr))
509 if (!threadSafetyCheckIsPointer(S, D, Attr))
512 D->addAttr(::new (S.Context) PtGuardedVarAttr(Attr.getRange(), S.Context));
515 static bool checkGuardedByAttrCommon(Sema &S, Decl *D,
516 const AttributeList &Attr,
518 assert(!Attr.isInvalid());
520 if (!checkAttributeNumArgs(S, Attr, 1))
523 // D must be either a member field or global (potentially shared) variable.
524 if (!mayBeSharedVariable(D)) {
525 S.Diag(Attr.getLoc(), diag::warn_thread_attribute_wrong_decl_type)
526 << Attr.getName() << ThreadExpectedFieldOrGlobalVar;
530 SmallVector<Expr*, 1> Args;
531 // check that all arguments are lockable objects
532 checkAttrArgsAreLockableObjs(S, D, Attr, Args);
533 unsigned Size = Args.size();
542 static void handleGuardedByAttr(Sema &S, Decl *D, const AttributeList &Attr) {
544 if (!checkGuardedByAttrCommon(S, D, Attr, Arg))
547 D->addAttr(::new (S.Context) GuardedByAttr(Attr.getRange(), S.Context, Arg));
550 static void handlePtGuardedByAttr(Sema &S, Decl *D,
551 const AttributeList &Attr) {
553 if (!checkGuardedByAttrCommon(S, D, Attr, Arg))
556 if (!threadSafetyCheckIsPointer(S, D, Attr))
559 D->addAttr(::new (S.Context) PtGuardedByAttr(Attr.getRange(),
563 static bool checkLockableAttrCommon(Sema &S, Decl *D,
564 const AttributeList &Attr) {
565 assert(!Attr.isInvalid());
567 if (!checkAttributeNumArgs(S, Attr, 0))
570 // FIXME: Lockable structs for C code.
571 if (!isa<CXXRecordDecl>(D)) {
572 S.Diag(Attr.getLoc(), diag::warn_thread_attribute_wrong_decl_type)
573 << Attr.getName() << ThreadExpectedClassOrStruct;
580 static void handleLockableAttr(Sema &S, Decl *D, const AttributeList &Attr) {
581 if (!checkLockableAttrCommon(S, D, Attr))
584 D->addAttr(::new (S.Context) LockableAttr(Attr.getRange(), S.Context));
587 static void handleScopedLockableAttr(Sema &S, Decl *D,
588 const AttributeList &Attr) {
589 if (!checkLockableAttrCommon(S, D, Attr))
592 D->addAttr(::new (S.Context) ScopedLockableAttr(Attr.getRange(), S.Context));
595 static void handleNoThreadSafetyAttr(Sema &S, Decl *D,
596 const AttributeList &Attr) {
597 assert(!Attr.isInvalid());
599 if (!checkAttributeNumArgs(S, Attr, 0))
602 if (!isa<FunctionDecl>(D) && !isa<FunctionTemplateDecl>(D)) {
603 S.Diag(Attr.getLoc(), diag::warn_thread_attribute_wrong_decl_type)
604 << Attr.getName() << ThreadExpectedFunctionOrMethod;
608 D->addAttr(::new (S.Context) NoThreadSafetyAnalysisAttr(Attr.getRange(),
612 static void handleNoAddressSafetyAttr(Sema &S, Decl *D,
613 const AttributeList &Attr) {
614 assert(!Attr.isInvalid());
616 if (!checkAttributeNumArgs(S, Attr, 0))
619 if (!isa<FunctionDecl>(D) && !isa<FunctionTemplateDecl>(D)) {
620 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
621 << Attr.getName() << ExpectedFunctionOrMethod;
625 D->addAttr(::new (S.Context) NoAddressSafetyAnalysisAttr(Attr.getRange(),
629 static bool checkAcquireOrderAttrCommon(Sema &S, Decl *D,
630 const AttributeList &Attr,
631 SmallVector<Expr*, 1> &Args) {
632 assert(!Attr.isInvalid());
634 if (!checkAttributeAtLeastNumArgs(S, Attr, 1))
637 // D must be either a member field or global (potentially shared) variable.
638 ValueDecl *VD = dyn_cast<ValueDecl>(D);
639 if (!VD || !mayBeSharedVariable(D)) {
640 S.Diag(Attr.getLoc(), diag::warn_thread_attribute_wrong_decl_type)
641 << Attr.getName() << ThreadExpectedFieldOrGlobalVar;
645 // Check that this attribute only applies to lockable types.
646 QualType QT = VD->getType();
647 if (!QT->isDependentType()) {
648 const RecordType *RT = getRecordType(QT);
649 if (!RT || !RT->getDecl()->getAttr<LockableAttr>()) {
650 S.Diag(Attr.getLoc(), diag::warn_thread_attribute_decl_not_lockable)
656 // Check that all arguments are lockable objects.
657 checkAttrArgsAreLockableObjs(S, D, Attr, Args);
658 if (Args.size() == 0)
664 static void handleAcquiredAfterAttr(Sema &S, Decl *D,
665 const AttributeList &Attr) {
666 SmallVector<Expr*, 1> Args;
667 if (!checkAcquireOrderAttrCommon(S, D, Attr, Args))
670 Expr **StartArg = &Args[0];
671 D->addAttr(::new (S.Context) AcquiredAfterAttr(Attr.getRange(), S.Context,
672 StartArg, Args.size()));
675 static void handleAcquiredBeforeAttr(Sema &S, Decl *D,
676 const AttributeList &Attr) {
677 SmallVector<Expr*, 1> Args;
678 if (!checkAcquireOrderAttrCommon(S, D, Attr, Args))
681 Expr **StartArg = &Args[0];
682 D->addAttr(::new (S.Context) AcquiredBeforeAttr(Attr.getRange(), S.Context,
683 StartArg, Args.size()));
686 static bool checkLockFunAttrCommon(Sema &S, Decl *D,
687 const AttributeList &Attr,
688 SmallVector<Expr*, 1> &Args) {
689 assert(!Attr.isInvalid());
691 // zero or more arguments ok
693 // check that the attribute is applied to a function
694 if (!isa<FunctionDecl>(D) && !isa<FunctionTemplateDecl>(D)) {
695 S.Diag(Attr.getLoc(), diag::warn_thread_attribute_wrong_decl_type)
696 << Attr.getName() << ThreadExpectedFunctionOrMethod;
700 // check that all arguments are lockable objects
701 checkAttrArgsAreLockableObjs(S, D, Attr, Args, 0, /*ParamIdxOk=*/true);
706 static void handleSharedLockFunctionAttr(Sema &S, Decl *D,
707 const AttributeList &Attr) {
708 SmallVector<Expr*, 1> Args;
709 if (!checkLockFunAttrCommon(S, D, Attr, Args))
712 unsigned Size = Args.size();
713 Expr **StartArg = Size == 0 ? 0 : &Args[0];
714 D->addAttr(::new (S.Context) SharedLockFunctionAttr(Attr.getRange(),
719 static void handleExclusiveLockFunctionAttr(Sema &S, Decl *D,
720 const AttributeList &Attr) {
721 SmallVector<Expr*, 1> Args;
722 if (!checkLockFunAttrCommon(S, D, Attr, Args))
725 unsigned Size = Args.size();
726 Expr **StartArg = Size == 0 ? 0 : &Args[0];
727 D->addAttr(::new (S.Context) ExclusiveLockFunctionAttr(Attr.getRange(),
732 static bool checkTryLockFunAttrCommon(Sema &S, Decl *D,
733 const AttributeList &Attr,
734 SmallVector<Expr*, 2> &Args) {
735 assert(!Attr.isInvalid());
737 if (!checkAttributeAtLeastNumArgs(S, Attr, 1))
740 if (!isa<FunctionDecl>(D) && !isa<FunctionTemplateDecl>(D)) {
741 S.Diag(Attr.getLoc(), diag::warn_thread_attribute_wrong_decl_type)
742 << Attr.getName() << ThreadExpectedFunctionOrMethod;
746 if (!isIntOrBool(Attr.getArg(0))) {
747 S.Diag(Attr.getLoc(), diag::err_attribute_first_argument_not_int_or_bool)
752 // check that all arguments are lockable objects
753 checkAttrArgsAreLockableObjs(S, D, Attr, Args, 1);
758 static void handleSharedTrylockFunctionAttr(Sema &S, Decl *D,
759 const AttributeList &Attr) {
760 SmallVector<Expr*, 2> Args;
761 if (!checkTryLockFunAttrCommon(S, D, Attr, Args))
764 unsigned Size = Args.size();
765 Expr **StartArg = Size == 0 ? 0 : &Args[0];
766 D->addAttr(::new (S.Context) SharedTrylockFunctionAttr(Attr.getRange(),
772 static void handleExclusiveTrylockFunctionAttr(Sema &S, Decl *D,
773 const AttributeList &Attr) {
774 SmallVector<Expr*, 2> Args;
775 if (!checkTryLockFunAttrCommon(S, D, Attr, Args))
778 unsigned Size = Args.size();
779 Expr **StartArg = Size == 0 ? 0 : &Args[0];
780 D->addAttr(::new (S.Context) ExclusiveTrylockFunctionAttr(Attr.getRange(),
786 static bool checkLocksRequiredCommon(Sema &S, Decl *D,
787 const AttributeList &Attr,
788 SmallVector<Expr*, 1> &Args) {
789 assert(!Attr.isInvalid());
791 if (!checkAttributeAtLeastNumArgs(S, Attr, 1))
794 if (!isa<FunctionDecl>(D) && !isa<FunctionTemplateDecl>(D)) {
795 S.Diag(Attr.getLoc(), diag::warn_thread_attribute_wrong_decl_type)
796 << Attr.getName() << ThreadExpectedFunctionOrMethod;
800 // check that all arguments are lockable objects
801 checkAttrArgsAreLockableObjs(S, D, Attr, Args);
802 if (Args.size() == 0)
808 static void handleExclusiveLocksRequiredAttr(Sema &S, Decl *D,
809 const AttributeList &Attr) {
810 SmallVector<Expr*, 1> Args;
811 if (!checkLocksRequiredCommon(S, D, Attr, Args))
814 Expr **StartArg = &Args[0];
815 D->addAttr(::new (S.Context) ExclusiveLocksRequiredAttr(Attr.getRange(),
821 static void handleSharedLocksRequiredAttr(Sema &S, Decl *D,
822 const AttributeList &Attr) {
823 SmallVector<Expr*, 1> Args;
824 if (!checkLocksRequiredCommon(S, D, Attr, Args))
827 Expr **StartArg = &Args[0];
828 D->addAttr(::new (S.Context) SharedLocksRequiredAttr(Attr.getRange(),
834 static void handleUnlockFunAttr(Sema &S, Decl *D,
835 const AttributeList &Attr) {
836 assert(!Attr.isInvalid());
838 // zero or more arguments ok
840 if (!isa<FunctionDecl>(D) && !isa<FunctionTemplateDecl>(D)) {
841 S.Diag(Attr.getLoc(), diag::warn_thread_attribute_wrong_decl_type)
842 << Attr.getName() << ThreadExpectedFunctionOrMethod;
846 // check that all arguments are lockable objects
847 SmallVector<Expr*, 1> Args;
848 checkAttrArgsAreLockableObjs(S, D, Attr, Args, 0, /*ParamIdxOk=*/true);
849 unsigned Size = Args.size();
850 Expr **StartArg = Size == 0 ? 0 : &Args[0];
852 D->addAttr(::new (S.Context) UnlockFunctionAttr(Attr.getRange(), S.Context,
856 static void handleLockReturnedAttr(Sema &S, Decl *D,
857 const AttributeList &Attr) {
858 assert(!Attr.isInvalid());
860 if (!checkAttributeNumArgs(S, Attr, 1))
862 Expr *Arg = Attr.getArg(0);
864 if (!isa<FunctionDecl>(D) && !isa<FunctionTemplateDecl>(D)) {
865 S.Diag(Attr.getLoc(), diag::warn_thread_attribute_wrong_decl_type)
866 << Attr.getName() << ThreadExpectedFunctionOrMethod;
870 if (Arg->isTypeDependent())
873 // check that the argument is lockable object
874 SmallVector<Expr*, 1> Args;
875 checkAttrArgsAreLockableObjs(S, D, Attr, Args);
876 unsigned Size = Args.size();
880 D->addAttr(::new (S.Context) LockReturnedAttr(Attr.getRange(), S.Context,
884 static void handleLocksExcludedAttr(Sema &S, Decl *D,
885 const AttributeList &Attr) {
886 assert(!Attr.isInvalid());
888 if (!checkAttributeAtLeastNumArgs(S, Attr, 1))
891 if (!isa<FunctionDecl>(D) && !isa<FunctionTemplateDecl>(D)) {
892 S.Diag(Attr.getLoc(), diag::warn_thread_attribute_wrong_decl_type)
893 << Attr.getName() << ThreadExpectedFunctionOrMethod;
897 // check that all arguments are lockable objects
898 SmallVector<Expr*, 1> Args;
899 checkAttrArgsAreLockableObjs(S, D, Attr, Args);
900 unsigned Size = Args.size();
903 Expr **StartArg = &Args[0];
905 D->addAttr(::new (S.Context) LocksExcludedAttr(Attr.getRange(), S.Context,
910 static void handleExtVectorTypeAttr(Sema &S, Scope *scope, Decl *D,
911 const AttributeList &Attr) {
912 TypedefNameDecl *tDecl = dyn_cast<TypedefNameDecl>(D);
914 S.Diag(Attr.getLoc(), diag::err_typecheck_ext_vector_not_typedef);
918 QualType curType = tDecl->getUnderlyingType();
922 // Special case where the argument is a template id.
923 if (Attr.getParameterName()) {
925 SourceLocation TemplateKWLoc;
927 id.setIdentifier(Attr.getParameterName(), Attr.getLoc());
929 ExprResult Size = S.ActOnIdExpression(scope, SS, TemplateKWLoc, id,
931 if (Size.isInvalid())
934 sizeExpr = Size.get();
936 // check the attribute arguments.
937 if (!checkAttributeNumArgs(S, Attr, 1))
940 sizeExpr = Attr.getArg(0);
943 // Instantiate/Install the vector type, and let Sema build the type for us.
944 // This will run the reguired checks.
945 QualType T = S.BuildExtVectorType(curType, sizeExpr, Attr.getLoc());
947 // FIXME: preserve the old source info.
948 tDecl->setTypeSourceInfo(S.Context.getTrivialTypeSourceInfo(T));
950 // Remember this typedef decl, we will need it later for diagnostics.
951 S.ExtVectorDecls.push_back(tDecl);
955 static void handlePackedAttr(Sema &S, Decl *D, const AttributeList &Attr) {
956 // check the attribute arguments.
957 if (!checkAttributeNumArgs(S, Attr, 0))
960 if (TagDecl *TD = dyn_cast<TagDecl>(D))
961 TD->addAttr(::new (S.Context) PackedAttr(Attr.getRange(), S.Context));
962 else if (FieldDecl *FD = dyn_cast<FieldDecl>(D)) {
963 // If the alignment is less than or equal to 8 bits, the packed attribute
965 if (!FD->getType()->isIncompleteType() &&
966 S.Context.getTypeAlign(FD->getType()) <= 8)
967 S.Diag(Attr.getLoc(), diag::warn_attribute_ignored_for_field_of_type)
968 << Attr.getName() << FD->getType();
970 FD->addAttr(::new (S.Context) PackedAttr(Attr.getRange(), S.Context));
972 S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << Attr.getName();
975 static void handleMsStructAttr(Sema &S, Decl *D, const AttributeList &Attr) {
976 if (TagDecl *TD = dyn_cast<TagDecl>(D))
977 TD->addAttr(::new (S.Context) MsStructAttr(Attr.getRange(), S.Context));
979 S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << Attr.getName();
982 static void handleIBAction(Sema &S, Decl *D, const AttributeList &Attr) {
983 // check the attribute arguments.
984 if (!checkAttributeNumArgs(S, Attr, 0))
987 // The IBAction attributes only apply to instance methods.
988 if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D))
989 if (MD->isInstanceMethod()) {
990 D->addAttr(::new (S.Context) IBActionAttr(Attr.getRange(), S.Context));
994 S.Diag(Attr.getLoc(), diag::warn_attribute_ibaction) << Attr.getName();
997 static bool checkIBOutletCommon(Sema &S, Decl *D, const AttributeList &Attr) {
998 // The IBOutlet/IBOutletCollection attributes only apply to instance
999 // variables or properties of Objective-C classes. The outlet must also
1000 // have an object reference type.
1001 if (const ObjCIvarDecl *VD = dyn_cast<ObjCIvarDecl>(D)) {
1002 if (!VD->getType()->getAs<ObjCObjectPointerType>()) {
1003 S.Diag(Attr.getLoc(), diag::warn_iboutlet_object_type)
1004 << Attr.getName() << VD->getType() << 0;
1008 else if (const ObjCPropertyDecl *PD = dyn_cast<ObjCPropertyDecl>(D)) {
1009 if (!PD->getType()->getAs<ObjCObjectPointerType>()) {
1010 S.Diag(Attr.getLoc(), diag::warn_iboutlet_object_type)
1011 << Attr.getName() << PD->getType() << 1;
1016 S.Diag(Attr.getLoc(), diag::warn_attribute_iboutlet) << Attr.getName();
1023 static void handleIBOutlet(Sema &S, Decl *D, const AttributeList &Attr) {
1024 // check the attribute arguments.
1025 if (!checkAttributeNumArgs(S, Attr, 0))
1028 if (!checkIBOutletCommon(S, D, Attr))
1031 D->addAttr(::new (S.Context) IBOutletAttr(Attr.getRange(), S.Context));
1034 static void handleIBOutletCollection(Sema &S, Decl *D,
1035 const AttributeList &Attr) {
1037 // The iboutletcollection attribute can have zero or one arguments.
1038 if (Attr.getParameterName() && Attr.getNumArgs() > 0) {
1039 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
1043 if (!checkIBOutletCommon(S, D, Attr))
1046 IdentifierInfo *II = Attr.getParameterName();
1048 II = &S.Context.Idents.get("NSObject");
1050 ParsedType TypeRep = S.getTypeName(*II, Attr.getLoc(),
1051 S.getScopeForContext(D->getDeclContext()->getParent()));
1053 S.Diag(Attr.getLoc(), diag::err_iboutletcollection_type) << II;
1056 QualType QT = TypeRep.get();
1057 // Diagnose use of non-object type in iboutletcollection attribute.
1058 // FIXME. Gnu attribute extension ignores use of builtin types in
1059 // attributes. So, __attribute__((iboutletcollection(char))) will be
1060 // treated as __attribute__((iboutletcollection())).
1061 if (!QT->isObjCIdType() && !QT->isObjCObjectType()) {
1062 S.Diag(Attr.getLoc(), diag::err_iboutletcollection_type) << II;
1065 D->addAttr(::new (S.Context) IBOutletCollectionAttr(Attr.getRange(),S.Context,
1066 QT, Attr.getParameterLoc()));
1069 static void possibleTransparentUnionPointerType(QualType &T) {
1070 if (const RecordType *UT = T->getAsUnionType())
1071 if (UT && UT->getDecl()->hasAttr<TransparentUnionAttr>()) {
1072 RecordDecl *UD = UT->getDecl();
1073 for (RecordDecl::field_iterator it = UD->field_begin(),
1074 itend = UD->field_end(); it != itend; ++it) {
1075 QualType QT = it->getType();
1076 if (QT->isAnyPointerType() || QT->isBlockPointerType()) {
1084 static void handleAllocSizeAttr(Sema &S, Decl *D, const AttributeList &Attr) {
1085 if (!isFunctionOrMethod(D)) {
1086 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
1087 << "alloc_size" << ExpectedFunctionOrMethod;
1091 if (!checkAttributeAtLeastNumArgs(S, Attr, 1))
1094 // In C++ the implicit 'this' function parameter also counts, and they are
1095 // counted from one.
1096 bool HasImplicitThisParam = isInstanceMethod(D);
1097 unsigned NumArgs = getFunctionOrMethodNumArgs(D) + HasImplicitThisParam;
1099 SmallVector<unsigned, 8> SizeArgs;
1101 for (AttributeList::arg_iterator I = Attr.arg_begin(),
1102 E = Attr.arg_end(); I!=E; ++I) {
1103 // The argument must be an integer constant expression.
1105 llvm::APSInt ArgNum;
1106 if (Ex->isTypeDependent() || Ex->isValueDependent() ||
1107 !Ex->isIntegerConstantExpr(ArgNum, S.Context)) {
1108 S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int)
1109 << "alloc_size" << Ex->getSourceRange();
1113 uint64_t x = ArgNum.getZExtValue();
1115 if (x < 1 || x > NumArgs) {
1116 S.Diag(Attr.getLoc(), diag::err_attribute_argument_out_of_bounds)
1117 << "alloc_size" << I.getArgNum() << Ex->getSourceRange();
1122 if (HasImplicitThisParam) {
1124 S.Diag(Attr.getLoc(),
1125 diag::err_attribute_invalid_implicit_this_argument)
1126 << "alloc_size" << Ex->getSourceRange();
1132 // check if the function argument is of an integer type
1133 QualType T = getFunctionOrMethodArgType(D, x).getNonReferenceType();
1134 if (!T->isIntegerType()) {
1135 S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int)
1136 << "alloc_size" << Ex->getSourceRange();
1140 SizeArgs.push_back(x);
1143 // check if the function returns a pointer
1144 if (!getFunctionType(D)->getResultType()->isAnyPointerType()) {
1145 S.Diag(Attr.getLoc(), diag::warn_ns_attribute_wrong_return_type)
1146 << "alloc_size" << 0 /*function*/<< 1 /*pointer*/ << D->getSourceRange();
1149 D->addAttr(::new (S.Context) AllocSizeAttr(Attr.getRange(), S.Context,
1150 SizeArgs.data(), SizeArgs.size()));
1153 static void handleNonNullAttr(Sema &S, Decl *D, const AttributeList &Attr) {
1154 // GCC ignores the nonnull attribute on K&R style function prototypes, so we
1155 // ignore it as well
1156 if (!isFunctionOrMethod(D) || !hasFunctionProto(D)) {
1157 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
1158 << Attr.getName() << ExpectedFunction;
1162 // In C++ the implicit 'this' function parameter also counts, and they are
1163 // counted from one.
1164 bool HasImplicitThisParam = isInstanceMethod(D);
1165 unsigned NumArgs = getFunctionOrMethodNumArgs(D) + HasImplicitThisParam;
1167 // The nonnull attribute only applies to pointers.
1168 SmallVector<unsigned, 10> NonNullArgs;
1170 for (AttributeList::arg_iterator I=Attr.arg_begin(),
1171 E=Attr.arg_end(); I!=E; ++I) {
1174 // The argument must be an integer constant expression.
1176 llvm::APSInt ArgNum(32);
1177 if (Ex->isTypeDependent() || Ex->isValueDependent() ||
1178 !Ex->isIntegerConstantExpr(ArgNum, S.Context)) {
1179 S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int)
1180 << "nonnull" << Ex->getSourceRange();
1184 unsigned x = (unsigned) ArgNum.getZExtValue();
1186 if (x < 1 || x > NumArgs) {
1187 S.Diag(Attr.getLoc(), diag::err_attribute_argument_out_of_bounds)
1188 << "nonnull" << I.getArgNum() << Ex->getSourceRange();
1193 if (HasImplicitThisParam) {
1195 S.Diag(Attr.getLoc(),
1196 diag::err_attribute_invalid_implicit_this_argument)
1197 << "nonnull" << Ex->getSourceRange();
1203 // Is the function argument a pointer type?
1204 QualType T = getFunctionOrMethodArgType(D, x).getNonReferenceType();
1205 possibleTransparentUnionPointerType(T);
1207 if (!T->isAnyPointerType() && !T->isBlockPointerType()) {
1208 // FIXME: Should also highlight argument in decl.
1209 S.Diag(Attr.getLoc(), diag::warn_nonnull_pointers_only)
1210 << "nonnull" << Ex->getSourceRange();
1214 NonNullArgs.push_back(x);
1217 // If no arguments were specified to __attribute__((nonnull)) then all pointer
1218 // arguments have a nonnull attribute.
1219 if (NonNullArgs.empty()) {
1220 for (unsigned I = 0, E = getFunctionOrMethodNumArgs(D); I != E; ++I) {
1221 QualType T = getFunctionOrMethodArgType(D, I).getNonReferenceType();
1222 possibleTransparentUnionPointerType(T);
1223 if (T->isAnyPointerType() || T->isBlockPointerType())
1224 NonNullArgs.push_back(I);
1227 // No pointer arguments?
1228 if (NonNullArgs.empty()) {
1229 // Warn the trivial case only if attribute is not coming from a
1230 // macro instantiation.
1231 if (Attr.getLoc().isFileID())
1232 S.Diag(Attr.getLoc(), diag::warn_attribute_nonnull_no_pointers);
1237 unsigned* start = &NonNullArgs[0];
1238 unsigned size = NonNullArgs.size();
1239 llvm::array_pod_sort(start, start + size);
1240 D->addAttr(::new (S.Context) NonNullAttr(Attr.getRange(), S.Context, start,
1244 static void handleOwnershipAttr(Sema &S, Decl *D, const AttributeList &AL) {
1245 // This attribute must be applied to a function declaration.
1246 // The first argument to the attribute must be a string,
1247 // the name of the resource, for example "malloc".
1248 // The following arguments must be argument indexes, the arguments must be
1249 // of integer type for Returns, otherwise of pointer type.
1250 // The difference between Holds and Takes is that a pointer may still be used
1251 // after being held. free() should be __attribute((ownership_takes)), whereas
1252 // a list append function may well be __attribute((ownership_holds)).
1254 if (!AL.getParameterName()) {
1255 S.Diag(AL.getLoc(), diag::err_attribute_argument_n_not_string)
1256 << AL.getName()->getName() << 1;
1259 // Figure out our Kind, and check arguments while we're at it.
1260 OwnershipAttr::OwnershipKind K;
1261 switch (AL.getKind()) {
1262 case AttributeList::AT_ownership_takes:
1263 K = OwnershipAttr::Takes;
1264 if (AL.getNumArgs() < 1) {
1265 S.Diag(AL.getLoc(), diag::err_attribute_wrong_number_arguments) << 2;
1269 case AttributeList::AT_ownership_holds:
1270 K = OwnershipAttr::Holds;
1271 if (AL.getNumArgs() < 1) {
1272 S.Diag(AL.getLoc(), diag::err_attribute_wrong_number_arguments) << 2;
1276 case AttributeList::AT_ownership_returns:
1277 K = OwnershipAttr::Returns;
1278 if (AL.getNumArgs() > 1) {
1279 S.Diag(AL.getLoc(), diag::err_attribute_wrong_number_arguments)
1280 << AL.getNumArgs() + 1;
1285 // This should never happen given how we are called.
1286 llvm_unreachable("Unknown ownership attribute");
1289 if (!isFunction(D) || !hasFunctionProto(D)) {
1290 S.Diag(AL.getLoc(), diag::warn_attribute_wrong_decl_type)
1291 << AL.getName() << ExpectedFunction;
1295 // In C++ the implicit 'this' function parameter also counts, and they are
1296 // counted from one.
1297 bool HasImplicitThisParam = isInstanceMethod(D);
1298 unsigned NumArgs = getFunctionOrMethodNumArgs(D) + HasImplicitThisParam;
1300 StringRef Module = AL.getParameterName()->getName();
1302 // Normalize the argument, __foo__ becomes foo.
1303 if (Module.startswith("__") && Module.endswith("__"))
1304 Module = Module.substr(2, Module.size() - 4);
1306 SmallVector<unsigned, 10> OwnershipArgs;
1308 for (AttributeList::arg_iterator I = AL.arg_begin(), E = AL.arg_end(); I != E;
1312 llvm::APSInt ArgNum(32);
1313 if (IdxExpr->isTypeDependent() || IdxExpr->isValueDependent()
1314 || !IdxExpr->isIntegerConstantExpr(ArgNum, S.Context)) {
1315 S.Diag(AL.getLoc(), diag::err_attribute_argument_not_int)
1316 << AL.getName()->getName() << IdxExpr->getSourceRange();
1320 unsigned x = (unsigned) ArgNum.getZExtValue();
1322 if (x > NumArgs || x < 1) {
1323 S.Diag(AL.getLoc(), diag::err_attribute_argument_out_of_bounds)
1324 << AL.getName()->getName() << x << IdxExpr->getSourceRange();
1328 if (HasImplicitThisParam) {
1330 S.Diag(AL.getLoc(), diag::err_attribute_invalid_implicit_this_argument)
1331 << "ownership" << IdxExpr->getSourceRange();
1338 case OwnershipAttr::Takes:
1339 case OwnershipAttr::Holds: {
1340 // Is the function argument a pointer type?
1341 QualType T = getFunctionOrMethodArgType(D, x);
1342 if (!T->isAnyPointerType() && !T->isBlockPointerType()) {
1343 // FIXME: Should also highlight argument in decl.
1344 S.Diag(AL.getLoc(), diag::err_ownership_type)
1345 << ((K==OwnershipAttr::Takes)?"ownership_takes":"ownership_holds")
1347 << IdxExpr->getSourceRange();
1352 case OwnershipAttr::Returns: {
1353 if (AL.getNumArgs() > 1) {
1354 // Is the function argument an integer type?
1355 Expr *IdxExpr = AL.getArg(0);
1356 llvm::APSInt ArgNum(32);
1357 if (IdxExpr->isTypeDependent() || IdxExpr->isValueDependent()
1358 || !IdxExpr->isIntegerConstantExpr(ArgNum, S.Context)) {
1359 S.Diag(AL.getLoc(), diag::err_ownership_type)
1360 << "ownership_returns" << "integer"
1361 << IdxExpr->getSourceRange();
1369 // Check we don't have a conflict with another ownership attribute.
1370 for (specific_attr_iterator<OwnershipAttr>
1371 i = D->specific_attr_begin<OwnershipAttr>(),
1372 e = D->specific_attr_end<OwnershipAttr>();
1374 if ((*i)->getOwnKind() != K) {
1375 for (const unsigned *I = (*i)->args_begin(), *E = (*i)->args_end();
1378 S.Diag(AL.getLoc(), diag::err_attributes_are_not_compatible)
1379 << AL.getName()->getName() << "ownership_*";
1384 OwnershipArgs.push_back(x);
1387 unsigned* start = OwnershipArgs.data();
1388 unsigned size = OwnershipArgs.size();
1389 llvm::array_pod_sort(start, start + size);
1391 if (K != OwnershipAttr::Returns && OwnershipArgs.empty()) {
1392 S.Diag(AL.getLoc(), diag::err_attribute_wrong_number_arguments) << 2;
1396 D->addAttr(::new (S.Context) OwnershipAttr(AL.getLoc(), S.Context, K, Module,
1400 /// Whether this declaration has internal linkage for the purposes of
1401 /// things that want to complain about things not have internal linkage.
1402 static bool hasEffectivelyInternalLinkage(NamedDecl *D) {
1403 switch (D->getLinkage()) {
1405 case InternalLinkage:
1408 // Template instantiations that go from external to unique-external
1409 // shouldn't get diagnosed.
1410 case UniqueExternalLinkage:
1413 case ExternalLinkage:
1416 llvm_unreachable("unknown linkage kind!");
1419 static void handleWeakRefAttr(Sema &S, Decl *D, const AttributeList &Attr) {
1420 // Check the attribute arguments.
1421 if (Attr.getNumArgs() > 1) {
1422 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
1426 if (!isa<VarDecl>(D) && !isa<FunctionDecl>(D)) {
1427 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_decl_type)
1428 << Attr.getName() << ExpectedVariableOrFunction;
1432 NamedDecl *nd = cast<NamedDecl>(D);
1436 // static int a __attribute__((weakref ("v2")));
1437 // static int b() __attribute__((weakref ("f3")));
1439 // and ignores the attributes of
1441 // static int a __attribute__((weakref ("v2")));
1444 const DeclContext *Ctx = D->getDeclContext()->getRedeclContext();
1445 if (!Ctx->isFileContext()) {
1446 S.Diag(Attr.getLoc(), diag::err_attribute_weakref_not_global_context) <<
1447 nd->getNameAsString();
1451 // The GCC manual says
1453 // At present, a declaration to which `weakref' is attached can only
1458 // Without a TARGET,
1459 // given as an argument to `weakref' or to `alias', `weakref' is
1460 // equivalent to `weak'.
1462 // gcc 4.4.1 will accept
1463 // int a7 __attribute__((weakref));
1465 // int a7 __attribute__((weak));
1466 // This looks like a bug in gcc. We reject that for now. We should revisit
1467 // it if this behaviour is actually used.
1469 if (!hasEffectivelyInternalLinkage(nd)) {
1470 S.Diag(Attr.getLoc(), diag::err_attribute_weakref_not_static);
1475 // static ((alias ("y"), weakref)).
1476 // Should we? How to check that weakref is before or after alias?
1478 if (Attr.getNumArgs() == 1) {
1479 Expr *Arg = Attr.getArg(0);
1480 Arg = Arg->IgnoreParenCasts();
1481 StringLiteral *Str = dyn_cast<StringLiteral>(Arg);
1483 if (!Str || !Str->isAscii()) {
1484 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string)
1488 // GCC will accept anything as the argument of weakref. Should we
1489 // check for an existing decl?
1490 D->addAttr(::new (S.Context) AliasAttr(Attr.getRange(), S.Context,
1494 D->addAttr(::new (S.Context) WeakRefAttr(Attr.getRange(), S.Context));
1497 static void handleAliasAttr(Sema &S, Decl *D, const AttributeList &Attr) {
1498 // check the attribute arguments.
1499 if (Attr.getNumArgs() != 1) {
1500 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
1504 Expr *Arg = Attr.getArg(0);
1505 Arg = Arg->IgnoreParenCasts();
1506 StringLiteral *Str = dyn_cast<StringLiteral>(Arg);
1508 if (!Str || !Str->isAscii()) {
1509 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string)
1514 if (S.Context.getTargetInfo().getTriple().isOSDarwin()) {
1515 S.Diag(Attr.getLoc(), diag::err_alias_not_supported_on_darwin);
1519 // FIXME: check if target symbol exists in current file
1521 D->addAttr(::new (S.Context) AliasAttr(Attr.getRange(), S.Context,
1525 static void handleColdAttr(Sema &S, Decl *D, const AttributeList &Attr) {
1526 // Check the attribute arguments.
1527 if (!checkAttributeNumArgs(S, Attr, 0))
1530 if (!isa<FunctionDecl>(D)) {
1531 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
1532 << Attr.getName() << ExpectedFunction;
1536 if (D->hasAttr<HotAttr>()) {
1537 S.Diag(Attr.getLoc(), diag::err_attributes_are_not_compatible)
1538 << Attr.getName() << "hot";
1542 D->addAttr(::new (S.Context) ColdAttr(Attr.getRange(), S.Context));
1545 static void handleHotAttr(Sema &S, Decl *D, const AttributeList &Attr) {
1546 // Check the attribute arguments.
1547 if (!checkAttributeNumArgs(S, Attr, 0))
1550 if (!isa<FunctionDecl>(D)) {
1551 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
1552 << Attr.getName() << ExpectedFunction;
1556 if (D->hasAttr<ColdAttr>()) {
1557 S.Diag(Attr.getLoc(), diag::err_attributes_are_not_compatible)
1558 << Attr.getName() << "cold";
1562 D->addAttr(::new (S.Context) HotAttr(Attr.getRange(), S.Context));
1565 static void handleNakedAttr(Sema &S, Decl *D, const AttributeList &Attr) {
1566 // Check the attribute arguments.
1567 if (!checkAttributeNumArgs(S, Attr, 0))
1570 if (!isa<FunctionDecl>(D)) {
1571 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
1572 << Attr.getName() << ExpectedFunction;
1576 D->addAttr(::new (S.Context) NakedAttr(Attr.getRange(), S.Context));
1579 static void handleAlwaysInlineAttr(Sema &S, Decl *D,
1580 const AttributeList &Attr) {
1581 // Check the attribute arguments.
1582 if (Attr.hasParameterOrArguments()) {
1583 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
1587 if (!isa<FunctionDecl>(D)) {
1588 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
1589 << Attr.getName() << ExpectedFunction;
1593 D->addAttr(::new (S.Context) AlwaysInlineAttr(Attr.getRange(), S.Context));
1596 static void handleTLSModelAttr(Sema &S, Decl *D,
1597 const AttributeList &Attr) {
1598 // Check the attribute arguments.
1599 if (Attr.getNumArgs() != 1) {
1600 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
1604 Expr *Arg = Attr.getArg(0);
1605 Arg = Arg->IgnoreParenCasts();
1606 StringLiteral *Str = dyn_cast<StringLiteral>(Arg);
1608 // Check that it is a string.
1610 S.Diag(Attr.getLoc(), diag::err_attribute_not_string) << "tls_model";
1614 if (!isa<VarDecl>(D) || !cast<VarDecl>(D)->isThreadSpecified()) {
1615 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_decl_type)
1616 << Attr.getName() << ExpectedTLSVar;
1620 // Check that the value.
1621 StringRef Model = Str->getString();
1622 if (Model != "global-dynamic" && Model != "local-dynamic"
1623 && Model != "initial-exec" && Model != "local-exec") {
1624 S.Diag(Attr.getLoc(), diag::err_attr_tlsmodel_arg);
1628 D->addAttr(::new (S.Context) TLSModelAttr(Attr.getRange(), S.Context,
1632 static void handleMallocAttr(Sema &S, Decl *D, const AttributeList &Attr) {
1633 // Check the attribute arguments.
1634 if (Attr.hasParameterOrArguments()) {
1635 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
1639 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
1640 QualType RetTy = FD->getResultType();
1641 if (RetTy->isAnyPointerType() || RetTy->isBlockPointerType()) {
1642 D->addAttr(::new (S.Context) MallocAttr(Attr.getRange(), S.Context));
1647 S.Diag(Attr.getLoc(), diag::warn_attribute_malloc_pointer_only);
1650 static void handleMayAliasAttr(Sema &S, Decl *D, const AttributeList &Attr) {
1651 // check the attribute arguments.
1652 if (!checkAttributeNumArgs(S, Attr, 0))
1655 D->addAttr(::new (S.Context) MayAliasAttr(Attr.getRange(), S.Context));
1658 static void handleNoCommonAttr(Sema &S, Decl *D, const AttributeList &Attr) {
1659 assert(!Attr.isInvalid());
1660 if (isa<VarDecl>(D))
1661 D->addAttr(::new (S.Context) NoCommonAttr(Attr.getRange(), S.Context));
1663 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
1664 << Attr.getName() << ExpectedVariable;
1667 static void handleCommonAttr(Sema &S, Decl *D, const AttributeList &Attr) {
1668 assert(!Attr.isInvalid());
1669 if (isa<VarDecl>(D))
1670 D->addAttr(::new (S.Context) CommonAttr(Attr.getRange(), S.Context));
1672 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
1673 << Attr.getName() << ExpectedVariable;
1676 static void handleNoReturnAttr(Sema &S, Decl *D, const AttributeList &attr) {
1677 if (hasDeclarator(D)) return;
1679 if (S.CheckNoReturnAttr(attr)) return;
1681 if (!isa<ObjCMethodDecl>(D)) {
1682 S.Diag(attr.getLoc(), diag::warn_attribute_wrong_decl_type)
1683 << attr.getName() << ExpectedFunctionOrMethod;
1687 D->addAttr(::new (S.Context) NoReturnAttr(attr.getRange(), S.Context));
1690 bool Sema::CheckNoReturnAttr(const AttributeList &attr) {
1691 if (attr.hasParameterOrArguments()) {
1692 Diag(attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
1700 static void handleAnalyzerNoReturnAttr(Sema &S, Decl *D,
1701 const AttributeList &Attr) {
1703 // The checking path for 'noreturn' and 'analyzer_noreturn' are different
1704 // because 'analyzer_noreturn' does not impact the type.
1706 if(!checkAttributeNumArgs(S, Attr, 0))
1709 if (!isFunctionOrMethod(D) && !isa<BlockDecl>(D)) {
1710 ValueDecl *VD = dyn_cast<ValueDecl>(D);
1711 if (VD == 0 || (!VD->getType()->isBlockPointerType()
1712 && !VD->getType()->isFunctionPointerType())) {
1713 S.Diag(Attr.getLoc(),
1714 Attr.isCXX0XAttribute() ? diag::err_attribute_wrong_decl_type
1715 : diag::warn_attribute_wrong_decl_type)
1716 << Attr.getName() << ExpectedFunctionMethodOrBlock;
1721 D->addAttr(::new (S.Context) AnalyzerNoReturnAttr(Attr.getRange(), S.Context));
1724 // PS3 PPU-specific.
1725 static void handleVecReturnAttr(Sema &S, Decl *D, const AttributeList &Attr) {
1727 Returning a Vector Class in Registers
1729 According to the PPU ABI specifications, a class with a single member of
1730 vector type is returned in memory when used as the return value of a function.
1731 This results in inefficient code when implementing vector classes. To return
1732 the value in a single vector register, add the vecreturn attribute to the
1733 class definition. This attribute is also applicable to struct types.
1739 __vector float xyzw;
1740 } __attribute__((vecreturn));
1742 Vector Add(Vector lhs, Vector rhs)
1745 result.xyzw = vec_add(lhs.xyzw, rhs.xyzw);
1746 return result; // This will be returned in a register
1749 if (!isa<RecordDecl>(D)) {
1750 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_decl_type)
1751 << Attr.getName() << ExpectedClass;
1755 if (D->getAttr<VecReturnAttr>()) {
1756 S.Diag(Attr.getLoc(), diag::err_repeat_attribute) << "vecreturn";
1760 RecordDecl *record = cast<RecordDecl>(D);
1763 if (!isa<CXXRecordDecl>(record)) {
1764 S.Diag(Attr.getLoc(), diag::err_attribute_vecreturn_only_vector_member);
1768 if (!cast<CXXRecordDecl>(record)->isPOD()) {
1769 S.Diag(Attr.getLoc(), diag::err_attribute_vecreturn_only_pod_record);
1773 for (RecordDecl::field_iterator iter = record->field_begin();
1774 iter != record->field_end(); iter++) {
1775 if ((count == 1) || !iter->getType()->isVectorType()) {
1776 S.Diag(Attr.getLoc(), diag::err_attribute_vecreturn_only_vector_member);
1782 D->addAttr(::new (S.Context) VecReturnAttr(Attr.getRange(), S.Context));
1785 static void handleDependencyAttr(Sema &S, Decl *D, const AttributeList &Attr) {
1786 if (!isFunctionOrMethod(D) && !isa<ParmVarDecl>(D)) {
1787 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_decl_type)
1788 << Attr.getName() << ExpectedFunctionMethodOrParameter;
1791 // FIXME: Actually store the attribute on the declaration
1794 static void handleUnusedAttr(Sema &S, Decl *D, const AttributeList &Attr) {
1795 // check the attribute arguments.
1796 if (Attr.hasParameterOrArguments()) {
1797 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
1801 if (!isa<VarDecl>(D) && !isa<ObjCIvarDecl>(D) && !isFunctionOrMethod(D) &&
1802 !isa<TypeDecl>(D) && !isa<LabelDecl>(D) && !isa<FieldDecl>(D)) {
1803 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
1804 << Attr.getName() << ExpectedVariableFunctionOrLabel;
1808 D->addAttr(::new (S.Context) UnusedAttr(Attr.getRange(), S.Context));
1811 static void handleReturnsTwiceAttr(Sema &S, Decl *D,
1812 const AttributeList &Attr) {
1813 // check the attribute arguments.
1814 if (Attr.hasParameterOrArguments()) {
1815 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
1819 if (!isa<FunctionDecl>(D)) {
1820 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
1821 << Attr.getName() << ExpectedFunction;
1825 D->addAttr(::new (S.Context) ReturnsTwiceAttr(Attr.getRange(), S.Context));
1828 static void handleUsedAttr(Sema &S, Decl *D, const AttributeList &Attr) {
1829 // check the attribute arguments.
1830 if (Attr.hasParameterOrArguments()) {
1831 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
1835 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
1836 if (VD->hasLocalStorage() || VD->hasExternalStorage()) {
1837 S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "used";
1840 } else if (!isFunctionOrMethod(D)) {
1841 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
1842 << Attr.getName() << ExpectedVariableOrFunction;
1846 D->addAttr(::new (S.Context) UsedAttr(Attr.getRange(), S.Context));
1849 static void handleConstructorAttr(Sema &S, Decl *D, const AttributeList &Attr) {
1850 // check the attribute arguments.
1851 if (Attr.getNumArgs() > 1) {
1852 S.Diag(Attr.getLoc(), diag::err_attribute_too_many_arguments) << 1;
1856 int priority = 65535; // FIXME: Do not hardcode such constants.
1857 if (Attr.getNumArgs() > 0) {
1858 Expr *E = Attr.getArg(0);
1859 llvm::APSInt Idx(32);
1860 if (E->isTypeDependent() || E->isValueDependent() ||
1861 !E->isIntegerConstantExpr(Idx, S.Context)) {
1862 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int)
1863 << "constructor" << 1 << E->getSourceRange();
1866 priority = Idx.getZExtValue();
1869 if (!isa<FunctionDecl>(D)) {
1870 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
1871 << Attr.getName() << ExpectedFunction;
1875 D->addAttr(::new (S.Context) ConstructorAttr(Attr.getRange(), S.Context,
1879 static void handleDestructorAttr(Sema &S, Decl *D, const AttributeList &Attr) {
1880 // check the attribute arguments.
1881 if (Attr.getNumArgs() > 1) {
1882 S.Diag(Attr.getLoc(), diag::err_attribute_too_many_arguments) << 1;
1886 int priority = 65535; // FIXME: Do not hardcode such constants.
1887 if (Attr.getNumArgs() > 0) {
1888 Expr *E = Attr.getArg(0);
1889 llvm::APSInt Idx(32);
1890 if (E->isTypeDependent() || E->isValueDependent() ||
1891 !E->isIntegerConstantExpr(Idx, S.Context)) {
1892 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int)
1893 << "destructor" << 1 << E->getSourceRange();
1896 priority = Idx.getZExtValue();
1899 if (!isa<FunctionDecl>(D)) {
1900 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
1901 << Attr.getName() << ExpectedFunction;
1905 D->addAttr(::new (S.Context) DestructorAttr(Attr.getRange(), S.Context,
1909 template <typename AttrTy>
1910 static void handleAttrWithMessage(Sema &S, Decl *D, const AttributeList &Attr,
1912 unsigned NumArgs = Attr.getNumArgs();
1914 S.Diag(Attr.getLoc(), diag::err_attribute_too_many_arguments) << 1;
1918 // Handle the case where the attribute has a text message.
1921 StringLiteral *SE = dyn_cast<StringLiteral>(Attr.getArg(0));
1923 S.Diag(Attr.getArg(0)->getLocStart(), diag::err_attribute_not_string)
1927 Str = SE->getString();
1930 D->addAttr(::new (S.Context) AttrTy(Attr.getRange(), S.Context, Str));
1933 static void handleArcWeakrefUnavailableAttr(Sema &S, Decl *D,
1934 const AttributeList &Attr) {
1935 unsigned NumArgs = Attr.getNumArgs();
1937 S.Diag(Attr.getLoc(), diag::err_attribute_too_many_arguments) << 0;
1941 D->addAttr(::new (S.Context) ArcWeakrefUnavailableAttr(
1942 Attr.getRange(), S.Context));
1945 static void handleObjCRootClassAttr(Sema &S, Decl *D,
1946 const AttributeList &Attr) {
1947 if (!isa<ObjCInterfaceDecl>(D)) {
1948 S.Diag(Attr.getLoc(), diag::err_attribute_requires_objc_interface);
1952 unsigned NumArgs = Attr.getNumArgs();
1954 S.Diag(Attr.getLoc(), diag::err_attribute_too_many_arguments) << 0;
1958 D->addAttr(::new (S.Context) ObjCRootClassAttr(Attr.getRange(), S.Context));
1961 static void handleObjCRequiresPropertyDefsAttr(Sema &S, Decl *D,
1962 const AttributeList &Attr) {
1963 if (!isa<ObjCInterfaceDecl>(D)) {
1964 S.Diag(Attr.getLoc(), diag::err_suppress_autosynthesis);
1968 unsigned NumArgs = Attr.getNumArgs();
1970 S.Diag(Attr.getLoc(), diag::err_attribute_too_many_arguments) << 0;
1974 D->addAttr(::new (S.Context) ObjCRequiresPropertyDefsAttr(
1975 Attr.getRange(), S.Context));
1978 static bool checkAvailabilityAttr(Sema &S, SourceRange Range,
1979 IdentifierInfo *Platform,
1980 VersionTuple Introduced,
1981 VersionTuple Deprecated,
1982 VersionTuple Obsoleted) {
1983 StringRef PlatformName
1984 = AvailabilityAttr::getPrettyPlatformName(Platform->getName());
1985 if (PlatformName.empty())
1986 PlatformName = Platform->getName();
1988 // Ensure that Introduced <= Deprecated <= Obsoleted (although not all
1989 // of these steps are needed).
1990 if (!Introduced.empty() && !Deprecated.empty() &&
1991 !(Introduced <= Deprecated)) {
1992 S.Diag(Range.getBegin(), diag::warn_availability_version_ordering)
1993 << 1 << PlatformName << Deprecated.getAsString()
1994 << 0 << Introduced.getAsString();
1998 if (!Introduced.empty() && !Obsoleted.empty() &&
1999 !(Introduced <= Obsoleted)) {
2000 S.Diag(Range.getBegin(), diag::warn_availability_version_ordering)
2001 << 2 << PlatformName << Obsoleted.getAsString()
2002 << 0 << Introduced.getAsString();
2006 if (!Deprecated.empty() && !Obsoleted.empty() &&
2007 !(Deprecated <= Obsoleted)) {
2008 S.Diag(Range.getBegin(), diag::warn_availability_version_ordering)
2009 << 2 << PlatformName << Obsoleted.getAsString()
2010 << 1 << Deprecated.getAsString();
2017 AvailabilityAttr *Sema::mergeAvailabilityAttr(Decl *D, SourceRange Range,
2018 IdentifierInfo *Platform,
2019 VersionTuple Introduced,
2020 VersionTuple Deprecated,
2021 VersionTuple Obsoleted,
2023 StringRef Message) {
2024 VersionTuple MergedIntroduced = Introduced;
2025 VersionTuple MergedDeprecated = Deprecated;
2026 VersionTuple MergedObsoleted = Obsoleted;
2027 bool FoundAny = false;
2029 if (D->hasAttrs()) {
2030 AttrVec &Attrs = D->getAttrs();
2031 for (unsigned i = 0, e = Attrs.size(); i != e;) {
2032 const AvailabilityAttr *OldAA = dyn_cast<AvailabilityAttr>(Attrs[i]);
2038 IdentifierInfo *OldPlatform = OldAA->getPlatform();
2039 if (OldPlatform != Platform) {
2045 VersionTuple OldIntroduced = OldAA->getIntroduced();
2046 VersionTuple OldDeprecated = OldAA->getDeprecated();
2047 VersionTuple OldObsoleted = OldAA->getObsoleted();
2048 bool OldIsUnavailable = OldAA->getUnavailable();
2049 StringRef OldMessage = OldAA->getMessage();
2051 if ((!OldIntroduced.empty() && !Introduced.empty() &&
2052 OldIntroduced != Introduced) ||
2053 (!OldDeprecated.empty() && !Deprecated.empty() &&
2054 OldDeprecated != Deprecated) ||
2055 (!OldObsoleted.empty() && !Obsoleted.empty() &&
2056 OldObsoleted != Obsoleted) ||
2057 (OldIsUnavailable != IsUnavailable) ||
2058 (OldMessage != Message)) {
2059 Diag(OldAA->getLocation(), diag::warn_mismatched_availability);
2060 Diag(Range.getBegin(), diag::note_previous_attribute);
2061 Attrs.erase(Attrs.begin() + i);
2066 VersionTuple MergedIntroduced2 = MergedIntroduced;
2067 VersionTuple MergedDeprecated2 = MergedDeprecated;
2068 VersionTuple MergedObsoleted2 = MergedObsoleted;
2070 if (MergedIntroduced2.empty())
2071 MergedIntroduced2 = OldIntroduced;
2072 if (MergedDeprecated2.empty())
2073 MergedDeprecated2 = OldDeprecated;
2074 if (MergedObsoleted2.empty())
2075 MergedObsoleted2 = OldObsoleted;
2077 if (checkAvailabilityAttr(*this, OldAA->getRange(), Platform,
2078 MergedIntroduced2, MergedDeprecated2,
2079 MergedObsoleted2)) {
2080 Attrs.erase(Attrs.begin() + i);
2085 MergedIntroduced = MergedIntroduced2;
2086 MergedDeprecated = MergedDeprecated2;
2087 MergedObsoleted = MergedObsoleted2;
2093 MergedIntroduced == Introduced &&
2094 MergedDeprecated == Deprecated &&
2095 MergedObsoleted == Obsoleted)
2098 if (!checkAvailabilityAttr(*this, Range, Platform, MergedIntroduced,
2099 MergedDeprecated, MergedObsoleted)) {
2100 return ::new (Context) AvailabilityAttr(Range, Context, Platform,
2101 Introduced, Deprecated,
2102 Obsoleted, IsUnavailable, Message);
2107 static void handleAvailabilityAttr(Sema &S, Decl *D,
2108 const AttributeList &Attr) {
2109 IdentifierInfo *Platform = Attr.getParameterName();
2110 SourceLocation PlatformLoc = Attr.getParameterLoc();
2112 if (AvailabilityAttr::getPrettyPlatformName(Platform->getName()).empty())
2113 S.Diag(PlatformLoc, diag::warn_availability_unknown_platform)
2116 AvailabilityChange Introduced = Attr.getAvailabilityIntroduced();
2117 AvailabilityChange Deprecated = Attr.getAvailabilityDeprecated();
2118 AvailabilityChange Obsoleted = Attr.getAvailabilityObsoleted();
2119 bool IsUnavailable = Attr.getUnavailableLoc().isValid();
2121 const StringLiteral *SE =
2122 dyn_cast_or_null<const StringLiteral>(Attr.getMessageExpr());
2124 Str = SE->getString();
2126 AvailabilityAttr *NewAttr = S.mergeAvailabilityAttr(D, Attr.getRange(),
2131 IsUnavailable, Str);
2133 D->addAttr(NewAttr);
2136 VisibilityAttr *Sema::mergeVisibilityAttr(Decl *D, SourceRange Range,
2137 VisibilityAttr::VisibilityType Vis) {
2138 if (isa<TypedefNameDecl>(D)) {
2139 Diag(Range.getBegin(), diag::warn_attribute_ignored) << "visibility";
2142 VisibilityAttr *ExistingAttr = D->getAttr<VisibilityAttr>();
2144 VisibilityAttr::VisibilityType ExistingVis = ExistingAttr->getVisibility();
2145 if (ExistingVis == Vis)
2147 Diag(ExistingAttr->getLocation(), diag::err_mismatched_visibility);
2148 Diag(Range.getBegin(), diag::note_previous_attribute);
2149 D->dropAttr<VisibilityAttr>();
2151 return ::new (Context) VisibilityAttr(Range, Context, Vis);
2154 static void handleVisibilityAttr(Sema &S, Decl *D, const AttributeList &Attr) {
2155 // check the attribute arguments.
2156 if(!checkAttributeNumArgs(S, Attr, 1))
2159 Expr *Arg = Attr.getArg(0);
2160 Arg = Arg->IgnoreParenCasts();
2161 StringLiteral *Str = dyn_cast<StringLiteral>(Arg);
2163 if (!Str || !Str->isAscii()) {
2164 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string)
2165 << "visibility" << 1;
2169 StringRef TypeStr = Str->getString();
2170 VisibilityAttr::VisibilityType type;
2172 if (TypeStr == "default")
2173 type = VisibilityAttr::Default;
2174 else if (TypeStr == "hidden")
2175 type = VisibilityAttr::Hidden;
2176 else if (TypeStr == "internal")
2177 type = VisibilityAttr::Hidden; // FIXME
2178 else if (TypeStr == "protected") {
2179 // Complain about attempts to use protected visibility on targets
2180 // (like Darwin) that don't support it.
2181 if (!S.Context.getTargetInfo().hasProtectedVisibility()) {
2182 S.Diag(Attr.getLoc(), diag::warn_attribute_protected_visibility);
2183 type = VisibilityAttr::Default;
2185 type = VisibilityAttr::Protected;
2188 S.Diag(Attr.getLoc(), diag::warn_attribute_unknown_visibility) << TypeStr;
2192 VisibilityAttr *NewAttr = S.mergeVisibilityAttr(D, Attr.getRange(), type);
2194 D->addAttr(NewAttr);
2197 static void handleObjCMethodFamilyAttr(Sema &S, Decl *decl,
2198 const AttributeList &Attr) {
2199 ObjCMethodDecl *method = dyn_cast<ObjCMethodDecl>(decl);
2201 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_decl_type)
2206 if (Attr.getNumArgs() != 0 || !Attr.getParameterName()) {
2207 if (!Attr.getParameterName() && Attr.getNumArgs() == 1) {
2208 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string)
2209 << "objc_method_family" << 1;
2211 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
2217 StringRef param = Attr.getParameterName()->getName();
2218 ObjCMethodFamilyAttr::FamilyKind family;
2219 if (param == "none")
2220 family = ObjCMethodFamilyAttr::OMF_None;
2221 else if (param == "alloc")
2222 family = ObjCMethodFamilyAttr::OMF_alloc;
2223 else if (param == "copy")
2224 family = ObjCMethodFamilyAttr::OMF_copy;
2225 else if (param == "init")
2226 family = ObjCMethodFamilyAttr::OMF_init;
2227 else if (param == "mutableCopy")
2228 family = ObjCMethodFamilyAttr::OMF_mutableCopy;
2229 else if (param == "new")
2230 family = ObjCMethodFamilyAttr::OMF_new;
2232 // Just warn and ignore it. This is future-proof against new
2233 // families being used in system headers.
2234 S.Diag(Attr.getParameterLoc(), diag::warn_unknown_method_family);
2238 if (family == ObjCMethodFamilyAttr::OMF_init &&
2239 !method->getResultType()->isObjCObjectPointerType()) {
2240 S.Diag(method->getLocation(), diag::err_init_method_bad_return_type)
2241 << method->getResultType();
2242 // Ignore the attribute.
2246 method->addAttr(new (S.Context) ObjCMethodFamilyAttr(Attr.getRange(),
2247 S.Context, family));
2250 static void handleObjCExceptionAttr(Sema &S, Decl *D,
2251 const AttributeList &Attr) {
2252 if (!checkAttributeNumArgs(S, Attr, 0))
2255 ObjCInterfaceDecl *OCI = dyn_cast<ObjCInterfaceDecl>(D);
2257 S.Diag(Attr.getLoc(), diag::err_attribute_requires_objc_interface);
2261 D->addAttr(::new (S.Context) ObjCExceptionAttr(Attr.getRange(), S.Context));
2264 static void handleObjCNSObject(Sema &S, Decl *D, const AttributeList &Attr) {
2265 if (Attr.getNumArgs() != 0) {
2266 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
2269 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(D)) {
2270 QualType T = TD->getUnderlyingType();
2271 if (!T->isPointerType() ||
2272 !T->getAs<PointerType>()->getPointeeType()->isRecordType()) {
2273 S.Diag(TD->getLocation(), diag::err_nsobject_attribute);
2277 else if (ObjCPropertyDecl *PD = dyn_cast<ObjCPropertyDecl>(D)) {
2278 QualType T = PD->getType();
2279 if (!T->isPointerType() ||
2280 !T->getAs<PointerType>()->getPointeeType()->isRecordType()) {
2281 S.Diag(PD->getLocation(), diag::err_nsobject_attribute);
2286 // It is okay to include this attribute on properties, e.g.:
2288 // @property (retain, nonatomic) struct Bork *Q __attribute__((NSObject));
2290 // In this case it follows tradition and suppresses an error in the above
2292 S.Diag(D->getLocation(), diag::warn_nsobject_attribute);
2294 D->addAttr(::new (S.Context) ObjCNSObjectAttr(Attr.getRange(), S.Context));
2298 handleOverloadableAttr(Sema &S, Decl *D, const AttributeList &Attr) {
2299 if (Attr.getNumArgs() != 0) {
2300 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
2304 if (!isa<FunctionDecl>(D)) {
2305 S.Diag(Attr.getLoc(), diag::err_attribute_overloadable_not_function);
2309 D->addAttr(::new (S.Context) OverloadableAttr(Attr.getRange(), S.Context));
2312 static void handleBlocksAttr(Sema &S, Decl *D, const AttributeList &Attr) {
2313 if (!Attr.getParameterName()) {
2314 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string)
2319 if (Attr.getNumArgs() != 0) {
2320 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
2324 BlocksAttr::BlockType type;
2325 if (Attr.getParameterName()->isStr("byref"))
2326 type = BlocksAttr::ByRef;
2328 S.Diag(Attr.getLoc(), diag::warn_attribute_type_not_supported)
2329 << "blocks" << Attr.getParameterName();
2333 D->addAttr(::new (S.Context) BlocksAttr(Attr.getRange(), S.Context, type));
2336 static void handleSentinelAttr(Sema &S, Decl *D, const AttributeList &Attr) {
2337 // check the attribute arguments.
2338 if (Attr.getNumArgs() > 2) {
2339 S.Diag(Attr.getLoc(), diag::err_attribute_too_many_arguments) << 2;
2343 unsigned sentinel = 0;
2344 if (Attr.getNumArgs() > 0) {
2345 Expr *E = Attr.getArg(0);
2346 llvm::APSInt Idx(32);
2347 if (E->isTypeDependent() || E->isValueDependent() ||
2348 !E->isIntegerConstantExpr(Idx, S.Context)) {
2349 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int)
2350 << "sentinel" << 1 << E->getSourceRange();
2354 if (Idx.isSigned() && Idx.isNegative()) {
2355 S.Diag(Attr.getLoc(), diag::err_attribute_sentinel_less_than_zero)
2356 << E->getSourceRange();
2360 sentinel = Idx.getZExtValue();
2363 unsigned nullPos = 0;
2364 if (Attr.getNumArgs() > 1) {
2365 Expr *E = Attr.getArg(1);
2366 llvm::APSInt Idx(32);
2367 if (E->isTypeDependent() || E->isValueDependent() ||
2368 !E->isIntegerConstantExpr(Idx, S.Context)) {
2369 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int)
2370 << "sentinel" << 2 << E->getSourceRange();
2373 nullPos = Idx.getZExtValue();
2375 if ((Idx.isSigned() && Idx.isNegative()) || nullPos > 1) {
2376 // FIXME: This error message could be improved, it would be nice
2377 // to say what the bounds actually are.
2378 S.Diag(Attr.getLoc(), diag::err_attribute_sentinel_not_zero_or_one)
2379 << E->getSourceRange();
2384 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
2385 const FunctionType *FT = FD->getType()->castAs<FunctionType>();
2386 if (isa<FunctionNoProtoType>(FT)) {
2387 S.Diag(Attr.getLoc(), diag::warn_attribute_sentinel_named_arguments);
2391 if (!cast<FunctionProtoType>(FT)->isVariadic()) {
2392 S.Diag(Attr.getLoc(), diag::warn_attribute_sentinel_not_variadic) << 0;
2395 } else if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) {
2396 if (!MD->isVariadic()) {
2397 S.Diag(Attr.getLoc(), diag::warn_attribute_sentinel_not_variadic) << 0;
2400 } else if (BlockDecl *BD = dyn_cast<BlockDecl>(D)) {
2401 if (!BD->isVariadic()) {
2402 S.Diag(Attr.getLoc(), diag::warn_attribute_sentinel_not_variadic) << 1;
2405 } else if (const VarDecl *V = dyn_cast<VarDecl>(D)) {
2406 QualType Ty = V->getType();
2407 if (Ty->isBlockPointerType() || Ty->isFunctionPointerType()) {
2408 const FunctionType *FT = Ty->isFunctionPointerType() ? getFunctionType(D)
2409 : Ty->getAs<BlockPointerType>()->getPointeeType()->getAs<FunctionType>();
2410 if (!cast<FunctionProtoType>(FT)->isVariadic()) {
2411 int m = Ty->isFunctionPointerType() ? 0 : 1;
2412 S.Diag(Attr.getLoc(), diag::warn_attribute_sentinel_not_variadic) << m;
2416 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
2417 << Attr.getName() << ExpectedFunctionMethodOrBlock;
2421 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
2422 << Attr.getName() << ExpectedFunctionMethodOrBlock;
2425 D->addAttr(::new (S.Context) SentinelAttr(Attr.getRange(), S.Context, sentinel,
2429 static void handleWarnUnusedResult(Sema &S, Decl *D, const AttributeList &Attr) {
2430 // check the attribute arguments.
2431 if (!checkAttributeNumArgs(S, Attr, 0))
2434 if (!isFunction(D) && !isa<ObjCMethodDecl>(D)) {
2435 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
2436 << Attr.getName() << ExpectedFunctionOrMethod;
2440 if (isFunction(D) && getFunctionType(D)->getResultType()->isVoidType()) {
2441 S.Diag(Attr.getLoc(), diag::warn_attribute_void_function_method)
2442 << Attr.getName() << 0;
2445 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D))
2446 if (MD->getResultType()->isVoidType()) {
2447 S.Diag(Attr.getLoc(), diag::warn_attribute_void_function_method)
2448 << Attr.getName() << 1;
2452 D->addAttr(::new (S.Context) WarnUnusedResultAttr(Attr.getRange(), S.Context));
2455 static void handleWeakAttr(Sema &S, Decl *D, const AttributeList &Attr) {
2456 // check the attribute arguments.
2457 if (Attr.hasParameterOrArguments()) {
2458 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
2462 if (!isa<VarDecl>(D) && !isa<FunctionDecl>(D)) {
2463 if (isa<CXXRecordDecl>(D)) {
2464 D->addAttr(::new (S.Context) WeakAttr(Attr.getRange(), S.Context));
2467 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
2468 << Attr.getName() << ExpectedVariableOrFunction;
2472 NamedDecl *nd = cast<NamedDecl>(D);
2474 // 'weak' only applies to declarations with external linkage.
2475 if (hasEffectivelyInternalLinkage(nd)) {
2476 S.Diag(Attr.getLoc(), diag::err_attribute_weak_static);
2480 nd->addAttr(::new (S.Context) WeakAttr(Attr.getRange(), S.Context));
2483 static void handleWeakImportAttr(Sema &S, Decl *D, const AttributeList &Attr) {
2484 // check the attribute arguments.
2485 if (!checkAttributeNumArgs(S, Attr, 0))
2489 // weak_import only applies to variable & function declarations.
2491 if (!D->canBeWeakImported(isDef)) {
2493 S.Diag(Attr.getLoc(),
2494 diag::warn_attribute_weak_import_invalid_on_definition)
2495 << "weak_import" << 2 /*variable and function*/;
2496 else if (isa<ObjCPropertyDecl>(D) || isa<ObjCMethodDecl>(D) ||
2497 (S.Context.getTargetInfo().getTriple().isOSDarwin() &&
2498 (isa<ObjCInterfaceDecl>(D) || isa<EnumDecl>(D)))) {
2499 // Nothing to warn about here.
2501 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
2502 << Attr.getName() << ExpectedVariableOrFunction;
2507 D->addAttr(::new (S.Context) WeakImportAttr(Attr.getRange(), S.Context));
2510 // Handles reqd_work_group_size and work_group_size_hint.
2511 static void handleWorkGroupSize(Sema &S, Decl *D,
2512 const AttributeList &Attr) {
2513 assert(Attr.getKind() == AttributeList::AT_ReqdWorkGroupSize
2514 || Attr.getKind() == AttributeList::AT_WorkGroupSizeHint);
2516 // Attribute has 3 arguments.
2517 if (!checkAttributeNumArgs(S, Attr, 3)) return;
2520 for (unsigned i = 0; i < 3; ++i) {
2521 Expr *E = Attr.getArg(i);
2522 llvm::APSInt ArgNum(32);
2523 if (E->isTypeDependent() || E->isValueDependent() ||
2524 !E->isIntegerConstantExpr(ArgNum, S.Context)) {
2525 S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int)
2526 << Attr.getName()->getName() << E->getSourceRange();
2529 WGSize[i] = (unsigned) ArgNum.getZExtValue();
2532 if (Attr.getKind() == AttributeList::AT_ReqdWorkGroupSize
2533 && D->hasAttr<ReqdWorkGroupSizeAttr>()) {
2534 ReqdWorkGroupSizeAttr *A = D->getAttr<ReqdWorkGroupSizeAttr>();
2535 if (!(A->getXDim() == WGSize[0] &&
2536 A->getYDim() == WGSize[1] &&
2537 A->getZDim() == WGSize[2])) {
2538 S.Diag(Attr.getLoc(), diag::warn_duplicate_attribute) <<
2543 if (Attr.getKind() == AttributeList::AT_WorkGroupSizeHint
2544 && D->hasAttr<WorkGroupSizeHintAttr>()) {
2545 WorkGroupSizeHintAttr *A = D->getAttr<WorkGroupSizeHintAttr>();
2546 if (!(A->getXDim() == WGSize[0] &&
2547 A->getYDim() == WGSize[1] &&
2548 A->getZDim() == WGSize[2])) {
2549 S.Diag(Attr.getLoc(), diag::warn_duplicate_attribute) <<
2554 if (Attr.getKind() == AttributeList::AT_ReqdWorkGroupSize)
2555 D->addAttr(::new (S.Context)
2556 ReqdWorkGroupSizeAttr(Attr.getRange(), S.Context,
2557 WGSize[0], WGSize[1], WGSize[2]));
2559 D->addAttr(::new (S.Context)
2560 WorkGroupSizeHintAttr(Attr.getRange(), S.Context,
2561 WGSize[0], WGSize[1], WGSize[2]));
2564 SectionAttr *Sema::mergeSectionAttr(Decl *D, SourceRange Range,
2566 if (SectionAttr *ExistingAttr = D->getAttr<SectionAttr>()) {
2567 if (ExistingAttr->getName() == Name)
2569 Diag(ExistingAttr->getLocation(), diag::warn_mismatched_section);
2570 Diag(Range.getBegin(), diag::note_previous_attribute);
2573 return ::new (Context) SectionAttr(Range, Context, Name);
2576 static void handleSectionAttr(Sema &S, Decl *D, const AttributeList &Attr) {
2577 // Attribute has no arguments.
2578 if (!checkAttributeNumArgs(S, Attr, 1))
2581 // Make sure that there is a string literal as the sections's single
2583 Expr *ArgExpr = Attr.getArg(0);
2584 StringLiteral *SE = dyn_cast<StringLiteral>(ArgExpr);
2586 S.Diag(ArgExpr->getLocStart(), diag::err_attribute_not_string) << "section";
2590 // If the target wants to validate the section specifier, make it happen.
2591 std::string Error = S.Context.getTargetInfo().isValidSectionSpecifier(SE->getString());
2592 if (!Error.empty()) {
2593 S.Diag(SE->getLocStart(), diag::err_attribute_section_invalid_for_target)
2598 // This attribute cannot be applied to local variables.
2599 if (isa<VarDecl>(D) && cast<VarDecl>(D)->hasLocalStorage()) {
2600 S.Diag(SE->getLocStart(), diag::err_attribute_section_local_variable);
2603 SectionAttr *NewAttr = S.mergeSectionAttr(D, Attr.getRange(),
2606 D->addAttr(NewAttr);
2610 static void handleNothrowAttr(Sema &S, Decl *D, const AttributeList &Attr) {
2611 // check the attribute arguments.
2612 if (Attr.hasParameterOrArguments()) {
2613 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
2617 if (NoThrowAttr *Existing = D->getAttr<NoThrowAttr>()) {
2618 if (Existing->getLocation().isInvalid())
2619 Existing->setRange(Attr.getRange());
2621 D->addAttr(::new (S.Context) NoThrowAttr(Attr.getRange(), S.Context));
2625 static void handleConstAttr(Sema &S, Decl *D, const AttributeList &Attr) {
2626 // check the attribute arguments.
2627 if (Attr.hasParameterOrArguments()) {
2628 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
2632 if (ConstAttr *Existing = D->getAttr<ConstAttr>()) {
2633 if (Existing->getLocation().isInvalid())
2634 Existing->setRange(Attr.getRange());
2636 D->addAttr(::new (S.Context) ConstAttr(Attr.getRange(), S.Context));
2640 static void handlePureAttr(Sema &S, Decl *D, const AttributeList &Attr) {
2641 // check the attribute arguments.
2642 if (!checkAttributeNumArgs(S, Attr, 0))
2645 D->addAttr(::new (S.Context) PureAttr(Attr.getRange(), S.Context));
2648 static void handleCleanupAttr(Sema &S, Decl *D, const AttributeList &Attr) {
2649 if (!Attr.getParameterName()) {
2650 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
2654 if (Attr.getNumArgs() != 0) {
2655 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
2659 VarDecl *VD = dyn_cast<VarDecl>(D);
2661 if (!VD || !VD->hasLocalStorage()) {
2662 S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "cleanup";
2666 // Look up the function
2667 // FIXME: Lookup probably isn't looking in the right place
2668 NamedDecl *CleanupDecl
2669 = S.LookupSingleName(S.TUScope, Attr.getParameterName(),
2670 Attr.getParameterLoc(), Sema::LookupOrdinaryName);
2672 S.Diag(Attr.getParameterLoc(), diag::err_attribute_cleanup_arg_not_found) <<
2673 Attr.getParameterName();
2677 FunctionDecl *FD = dyn_cast<FunctionDecl>(CleanupDecl);
2679 S.Diag(Attr.getParameterLoc(),
2680 diag::err_attribute_cleanup_arg_not_function)
2681 << Attr.getParameterName();
2685 if (FD->getNumParams() != 1) {
2686 S.Diag(Attr.getParameterLoc(),
2687 diag::err_attribute_cleanup_func_must_take_one_arg)
2688 << Attr.getParameterName();
2692 // We're currently more strict than GCC about what function types we accept.
2693 // If this ever proves to be a problem it should be easy to fix.
2694 QualType Ty = S.Context.getPointerType(VD->getType());
2695 QualType ParamTy = FD->getParamDecl(0)->getType();
2696 if (S.CheckAssignmentConstraints(FD->getParamDecl(0)->getLocation(),
2697 ParamTy, Ty) != Sema::Compatible) {
2698 S.Diag(Attr.getParameterLoc(),
2699 diag::err_attribute_cleanup_func_arg_incompatible_type) <<
2700 Attr.getParameterName() << ParamTy << Ty;
2704 D->addAttr(::new (S.Context) CleanupAttr(Attr.getRange(), S.Context, FD));
2705 S.MarkFunctionReferenced(Attr.getParameterLoc(), FD);
2708 /// Handle __attribute__((format_arg((idx)))) attribute based on
2709 /// http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html
2710 static void handleFormatArgAttr(Sema &S, Decl *D, const AttributeList &Attr) {
2711 if (!checkAttributeNumArgs(S, Attr, 1))
2714 if (!isFunctionOrMethod(D) || !hasFunctionProto(D)) {
2715 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
2716 << Attr.getName() << ExpectedFunction;
2720 // In C++ the implicit 'this' function parameter also counts, and they are
2721 // counted from one.
2722 bool HasImplicitThisParam = isInstanceMethod(D);
2723 unsigned NumArgs = getFunctionOrMethodNumArgs(D) + HasImplicitThisParam;
2724 unsigned FirstIdx = 1;
2726 // checks for the 2nd argument
2727 Expr *IdxExpr = Attr.getArg(0);
2728 llvm::APSInt Idx(32);
2729 if (IdxExpr->isTypeDependent() || IdxExpr->isValueDependent() ||
2730 !IdxExpr->isIntegerConstantExpr(Idx, S.Context)) {
2731 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int)
2732 << "format" << 2 << IdxExpr->getSourceRange();
2736 if (Idx.getZExtValue() < FirstIdx || Idx.getZExtValue() > NumArgs) {
2737 S.Diag(Attr.getLoc(), diag::err_attribute_argument_out_of_bounds)
2738 << "format" << 2 << IdxExpr->getSourceRange();
2742 unsigned ArgIdx = Idx.getZExtValue() - 1;
2744 if (HasImplicitThisParam) {
2746 S.Diag(Attr.getLoc(), diag::err_attribute_invalid_implicit_this_argument)
2747 << "format_arg" << IdxExpr->getSourceRange();
2753 // make sure the format string is really a string
2754 QualType Ty = getFunctionOrMethodArgType(D, ArgIdx);
2756 bool not_nsstring_type = !isNSStringType(Ty, S.Context);
2757 if (not_nsstring_type &&
2758 !isCFStringType(Ty, S.Context) &&
2759 (!Ty->isPointerType() ||
2760 !Ty->getAs<PointerType>()->getPointeeType()->isCharType())) {
2761 // FIXME: Should highlight the actual expression that has the wrong type.
2762 S.Diag(Attr.getLoc(), diag::err_format_attribute_not)
2763 << (not_nsstring_type ? "a string type" : "an NSString")
2764 << IdxExpr->getSourceRange();
2767 Ty = getFunctionOrMethodResultType(D);
2768 if (!isNSStringType(Ty, S.Context) &&
2769 !isCFStringType(Ty, S.Context) &&
2770 (!Ty->isPointerType() ||
2771 !Ty->getAs<PointerType>()->getPointeeType()->isCharType())) {
2772 // FIXME: Should highlight the actual expression that has the wrong type.
2773 S.Diag(Attr.getLoc(), diag::err_format_attribute_result_not)
2774 << (not_nsstring_type ? "string type" : "NSString")
2775 << IdxExpr->getSourceRange();
2779 D->addAttr(::new (S.Context) FormatArgAttr(Attr.getRange(), S.Context,
2780 Idx.getZExtValue()));
2783 enum FormatAttrKind {
2792 /// getFormatAttrKind - Map from format attribute names to supported format
2794 static FormatAttrKind getFormatAttrKind(StringRef Format) {
2795 return llvm::StringSwitch<FormatAttrKind>(Format)
2796 // Check for formats that get handled specially.
2797 .Case("NSString", NSStringFormat)
2798 .Case("CFString", CFStringFormat)
2799 .Case("strftime", StrftimeFormat)
2801 // Otherwise, check for supported formats.
2802 .Cases("scanf", "printf", "printf0", "strfmon", SupportedFormat)
2803 .Cases("cmn_err", "vcmn_err", "zcmn_err", SupportedFormat)
2804 .Case("kprintf", SupportedFormat) // OpenBSD.
2806 .Cases("gcc_diag", "gcc_cdiag", "gcc_cxxdiag", "gcc_tdiag", IgnoredFormat)
2807 .Default(InvalidFormat);
2810 /// Handle __attribute__((init_priority(priority))) attributes based on
2811 /// http://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Attributes.html
2812 static void handleInitPriorityAttr(Sema &S, Decl *D,
2813 const AttributeList &Attr) {
2814 if (!S.getLangOpts().CPlusPlus) {
2815 S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << Attr.getName();
2819 if (!isa<VarDecl>(D) || S.getCurFunctionOrMethodDecl()) {
2820 S.Diag(Attr.getLoc(), diag::err_init_priority_object_attr);
2824 QualType T = dyn_cast<VarDecl>(D)->getType();
2825 if (S.Context.getAsArrayType(T))
2826 T = S.Context.getBaseElementType(T);
2827 if (!T->getAs<RecordType>()) {
2828 S.Diag(Attr.getLoc(), diag::err_init_priority_object_attr);
2833 if (Attr.getNumArgs() != 1) {
2834 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
2838 Expr *priorityExpr = Attr.getArg(0);
2840 llvm::APSInt priority(32);
2841 if (priorityExpr->isTypeDependent() || priorityExpr->isValueDependent() ||
2842 !priorityExpr->isIntegerConstantExpr(priority, S.Context)) {
2843 S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int)
2844 << "init_priority" << priorityExpr->getSourceRange();
2848 unsigned prioritynum = priority.getZExtValue();
2849 if (prioritynum < 101 || prioritynum > 65535) {
2850 S.Diag(Attr.getLoc(), diag::err_attribute_argument_outof_range)
2851 << priorityExpr->getSourceRange();
2855 D->addAttr(::new (S.Context) InitPriorityAttr(Attr.getRange(), S.Context,
2859 FormatAttr *Sema::mergeFormatAttr(Decl *D, SourceRange Range, StringRef Format,
2860 int FormatIdx, int FirstArg) {
2861 // Check whether we already have an equivalent format attribute.
2862 for (specific_attr_iterator<FormatAttr>
2863 i = D->specific_attr_begin<FormatAttr>(),
2864 e = D->specific_attr_end<FormatAttr>();
2867 if (f->getType() == Format &&
2868 f->getFormatIdx() == FormatIdx &&
2869 f->getFirstArg() == FirstArg) {
2870 // If we don't have a valid location for this attribute, adopt the
2872 if (f->getLocation().isInvalid())
2878 return ::new (Context) FormatAttr(Range, Context, Format, FormatIdx,
2882 /// Handle __attribute__((format(type,idx,firstarg))) attributes based on
2883 /// http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html
2884 static void handleFormatAttr(Sema &S, Decl *D, const AttributeList &Attr) {
2886 if (!Attr.getParameterName()) {
2887 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string)
2892 if (Attr.getNumArgs() != 2) {
2893 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 3;
2897 if (!isFunctionOrMethodOrBlock(D) || !hasFunctionProto(D)) {
2898 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
2899 << Attr.getName() << ExpectedFunction;
2903 // In C++ the implicit 'this' function parameter also counts, and they are
2904 // counted from one.
2905 bool HasImplicitThisParam = isInstanceMethod(D);
2906 unsigned NumArgs = getFunctionOrMethodNumArgs(D) + HasImplicitThisParam;
2907 unsigned FirstIdx = 1;
2909 StringRef Format = Attr.getParameterName()->getName();
2911 // Normalize the argument, __foo__ becomes foo.
2912 if (Format.startswith("__") && Format.endswith("__"))
2913 Format = Format.substr(2, Format.size() - 4);
2915 // Check for supported formats.
2916 FormatAttrKind Kind = getFormatAttrKind(Format);
2918 if (Kind == IgnoredFormat)
2921 if (Kind == InvalidFormat) {
2922 S.Diag(Attr.getLoc(), diag::warn_attribute_type_not_supported)
2923 << "format" << Attr.getParameterName()->getName();
2927 // checks for the 2nd argument
2928 Expr *IdxExpr = Attr.getArg(0);
2929 llvm::APSInt Idx(32);
2930 if (IdxExpr->isTypeDependent() || IdxExpr->isValueDependent() ||
2931 !IdxExpr->isIntegerConstantExpr(Idx, S.Context)) {
2932 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int)
2933 << "format" << 2 << IdxExpr->getSourceRange();
2937 if (Idx.getZExtValue() < FirstIdx || Idx.getZExtValue() > NumArgs) {
2938 S.Diag(Attr.getLoc(), diag::err_attribute_argument_out_of_bounds)
2939 << "format" << 2 << IdxExpr->getSourceRange();
2943 // FIXME: Do we need to bounds check?
2944 unsigned ArgIdx = Idx.getZExtValue() - 1;
2946 if (HasImplicitThisParam) {
2948 S.Diag(Attr.getLoc(),
2949 diag::err_format_attribute_implicit_this_format_string)
2950 << IdxExpr->getSourceRange();
2956 // make sure the format string is really a string
2957 QualType Ty = getFunctionOrMethodArgType(D, ArgIdx);
2959 if (Kind == CFStringFormat) {
2960 if (!isCFStringType(Ty, S.Context)) {
2961 S.Diag(Attr.getLoc(), diag::err_format_attribute_not)
2962 << "a CFString" << IdxExpr->getSourceRange();
2965 } else if (Kind == NSStringFormat) {
2966 // FIXME: do we need to check if the type is NSString*? What are the
2968 if (!isNSStringType(Ty, S.Context)) {
2969 // FIXME: Should highlight the actual expression that has the wrong type.
2970 S.Diag(Attr.getLoc(), diag::err_format_attribute_not)
2971 << "an NSString" << IdxExpr->getSourceRange();
2974 } else if (!Ty->isPointerType() ||
2975 !Ty->getAs<PointerType>()->getPointeeType()->isCharType()) {
2976 // FIXME: Should highlight the actual expression that has the wrong type.
2977 S.Diag(Attr.getLoc(), diag::err_format_attribute_not)
2978 << "a string type" << IdxExpr->getSourceRange();
2982 // check the 3rd argument
2983 Expr *FirstArgExpr = Attr.getArg(1);
2984 llvm::APSInt FirstArg(32);
2985 if (FirstArgExpr->isTypeDependent() || FirstArgExpr->isValueDependent() ||
2986 !FirstArgExpr->isIntegerConstantExpr(FirstArg, S.Context)) {
2987 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int)
2988 << "format" << 3 << FirstArgExpr->getSourceRange();
2992 // check if the function is variadic if the 3rd argument non-zero
2993 if (FirstArg != 0) {
2994 if (isFunctionOrMethodVariadic(D)) {
2995 ++NumArgs; // +1 for ...
2997 S.Diag(D->getLocation(), diag::err_format_attribute_requires_variadic);
3002 // strftime requires FirstArg to be 0 because it doesn't read from any
3003 // variable the input is just the current time + the format string.
3004 if (Kind == StrftimeFormat) {
3005 if (FirstArg != 0) {
3006 S.Diag(Attr.getLoc(), diag::err_format_strftime_third_parameter)
3007 << FirstArgExpr->getSourceRange();
3010 // if 0 it disables parameter checking (to use with e.g. va_list)
3011 } else if (FirstArg != 0 && FirstArg != NumArgs) {
3012 S.Diag(Attr.getLoc(), diag::err_attribute_argument_out_of_bounds)
3013 << "format" << 3 << FirstArgExpr->getSourceRange();
3017 FormatAttr *NewAttr = S.mergeFormatAttr(D, Attr.getRange(), Format,
3019 FirstArg.getZExtValue());
3021 D->addAttr(NewAttr);
3024 static void handleTransparentUnionAttr(Sema &S, Decl *D,
3025 const AttributeList &Attr) {
3026 // check the attribute arguments.
3027 if (!checkAttributeNumArgs(S, Attr, 0))
3031 // Try to find the underlying union declaration.
3033 TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(D);
3034 if (TD && TD->getUnderlyingType()->isUnionType())
3035 RD = TD->getUnderlyingType()->getAsUnionType()->getDecl();
3037 RD = dyn_cast<RecordDecl>(D);
3039 if (!RD || !RD->isUnion()) {
3040 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
3041 << Attr.getName() << ExpectedUnion;
3045 if (!RD->isCompleteDefinition()) {
3046 S.Diag(Attr.getLoc(),
3047 diag::warn_transparent_union_attribute_not_definition);
3051 RecordDecl::field_iterator Field = RD->field_begin(),
3052 FieldEnd = RD->field_end();
3053 if (Field == FieldEnd) {
3054 S.Diag(Attr.getLoc(), diag::warn_transparent_union_attribute_zero_fields);
3058 FieldDecl *FirstField = *Field;
3059 QualType FirstType = FirstField->getType();
3060 if (FirstType->hasFloatingRepresentation() || FirstType->isVectorType()) {
3061 S.Diag(FirstField->getLocation(),
3062 diag::warn_transparent_union_attribute_floating)
3063 << FirstType->isVectorType() << FirstType;
3067 uint64_t FirstSize = S.Context.getTypeSize(FirstType);
3068 uint64_t FirstAlign = S.Context.getTypeAlign(FirstType);
3069 for (; Field != FieldEnd; ++Field) {
3070 QualType FieldType = Field->getType();
3071 if (S.Context.getTypeSize(FieldType) != FirstSize ||
3072 S.Context.getTypeAlign(FieldType) != FirstAlign) {
3073 // Warn if we drop the attribute.
3074 bool isSize = S.Context.getTypeSize(FieldType) != FirstSize;
3075 unsigned FieldBits = isSize? S.Context.getTypeSize(FieldType)
3076 : S.Context.getTypeAlign(FieldType);
3077 S.Diag(Field->getLocation(),
3078 diag::warn_transparent_union_attribute_field_size_align)
3079 << isSize << Field->getDeclName() << FieldBits;
3080 unsigned FirstBits = isSize? FirstSize : FirstAlign;
3081 S.Diag(FirstField->getLocation(),
3082 diag::note_transparent_union_first_field_size_align)
3083 << isSize << FirstBits;
3088 RD->addAttr(::new (S.Context) TransparentUnionAttr(Attr.getRange(), S.Context));
3091 static void handleAnnotateAttr(Sema &S, Decl *D, const AttributeList &Attr) {
3092 // check the attribute arguments.
3093 if (!checkAttributeNumArgs(S, Attr, 1))
3096 Expr *ArgExpr = Attr.getArg(0);
3097 StringLiteral *SE = dyn_cast<StringLiteral>(ArgExpr);
3099 // Make sure that there is a string literal as the annotation's single
3102 S.Diag(ArgExpr->getLocStart(), diag::err_attribute_not_string) <<"annotate";
3106 // Don't duplicate annotations that are already set.
3107 for (specific_attr_iterator<AnnotateAttr>
3108 i = D->specific_attr_begin<AnnotateAttr>(),
3109 e = D->specific_attr_end<AnnotateAttr>(); i != e; ++i) {
3110 if ((*i)->getAnnotation() == SE->getString())
3113 D->addAttr(::new (S.Context) AnnotateAttr(Attr.getRange(), S.Context,
3117 static void handleAlignedAttr(Sema &S, Decl *D, const AttributeList &Attr) {
3118 // check the attribute arguments.
3119 if (Attr.getNumArgs() > 1) {
3120 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
3124 //FIXME: The C++0x version of this attribute has more limited applicabilty
3125 // than GNU's, and should error out when it is used to specify a
3126 // weaker alignment, rather than being silently ignored.
3128 if (Attr.getNumArgs() == 0) {
3129 D->addAttr(::new (S.Context) AlignedAttr(Attr.getRange(), S.Context,
3130 true, 0, Attr.isDeclspecAttribute()));
3134 S.AddAlignedAttr(Attr.getRange(), D, Attr.getArg(0),
3135 Attr.isDeclspecAttribute());
3138 void Sema::AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E,
3140 // FIXME: Handle pack-expansions here.
3141 if (DiagnoseUnexpandedParameterPack(E))
3144 if (E->isTypeDependent() || E->isValueDependent()) {
3145 // Save dependent expressions in the AST to be instantiated.
3146 D->addAttr(::new (Context) AlignedAttr(AttrRange, Context, true, E,
3151 SourceLocation AttrLoc = AttrRange.getBegin();
3152 // FIXME: Cache the number on the Attr object?
3153 llvm::APSInt Alignment(32);
3155 = VerifyIntegerConstantExpression(E, &Alignment,
3156 diag::err_aligned_attribute_argument_not_int,
3157 /*AllowFold*/ false);
3158 if (ICE.isInvalid())
3160 if (!llvm::isPowerOf2_64(Alignment.getZExtValue())) {
3161 Diag(AttrLoc, diag::err_attribute_aligned_not_power_of_two)
3162 << E->getSourceRange();
3166 // We've already verified it's a power of 2, now let's make sure it's
3168 if (Alignment.getZExtValue() > 8192) {
3169 Diag(AttrLoc, diag::err_attribute_aligned_greater_than_8192)
3170 << E->getSourceRange();
3175 D->addAttr(::new (Context) AlignedAttr(AttrRange, Context, true, ICE.take(),
3179 void Sema::AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *TS,
3181 // FIXME: Cache the number on the Attr object if non-dependent?
3182 // FIXME: Perform checking of type validity
3183 D->addAttr(::new (Context) AlignedAttr(AttrRange, Context, false, TS,
3188 /// handleModeAttr - This attribute modifies the width of a decl with primitive
3191 /// Despite what would be logical, the mode attribute is a decl attribute, not a
3192 /// type attribute: 'int ** __attribute((mode(HI))) *G;' tries to make 'G' be
3193 /// HImode, not an intermediate pointer.
3194 static void handleModeAttr(Sema &S, Decl *D, const AttributeList &Attr) {
3195 // This attribute isn't documented, but glibc uses it. It changes
3196 // the width of an int or unsigned int to the specified size.
3198 // Check that there aren't any arguments
3199 if (!checkAttributeNumArgs(S, Attr, 0))
3203 IdentifierInfo *Name = Attr.getParameterName();
3205 S.Diag(Attr.getLoc(), diag::err_attribute_missing_parameter_name);
3209 StringRef Str = Attr.getParameterName()->getName();
3211 // Normalize the attribute name, __foo__ becomes foo.
3212 if (Str.startswith("__") && Str.endswith("__"))
3213 Str = Str.substr(2, Str.size() - 4);
3215 unsigned DestWidth = 0;
3216 bool IntegerMode = true;
3217 bool ComplexMode = false;
3218 switch (Str.size()) {
3221 case 'Q': DestWidth = 8; break;
3222 case 'H': DestWidth = 16; break;
3223 case 'S': DestWidth = 32; break;
3224 case 'D': DestWidth = 64; break;
3225 case 'X': DestWidth = 96; break;
3226 case 'T': DestWidth = 128; break;
3228 if (Str[1] == 'F') {
3229 IntegerMode = false;
3230 } else if (Str[1] == 'C') {
3231 IntegerMode = false;
3233 } else if (Str[1] != 'I') {
3238 // FIXME: glibc uses 'word' to define register_t; this is narrower than a
3239 // pointer on PIC16 and other embedded platforms.
3241 DestWidth = S.Context.getTargetInfo().getPointerWidth(0);
3242 else if (Str == "byte")
3243 DestWidth = S.Context.getTargetInfo().getCharWidth();
3246 if (Str == "pointer")
3247 DestWidth = S.Context.getTargetInfo().getPointerWidth(0);
3252 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(D))
3253 OldTy = TD->getUnderlyingType();
3254 else if (ValueDecl *VD = dyn_cast<ValueDecl>(D))
3255 OldTy = VD->getType();
3257 S.Diag(D->getLocation(), diag::err_attr_wrong_decl)
3258 << "mode" << Attr.getRange();
3262 if (!OldTy->getAs<BuiltinType>() && !OldTy->isComplexType())
3263 S.Diag(Attr.getLoc(), diag::err_mode_not_primitive);
3264 else if (IntegerMode) {
3265 if (!OldTy->isIntegralOrEnumerationType())
3266 S.Diag(Attr.getLoc(), diag::err_mode_wrong_type);
3267 } else if (ComplexMode) {
3268 if (!OldTy->isComplexType())
3269 S.Diag(Attr.getLoc(), diag::err_mode_wrong_type);
3271 if (!OldTy->isFloatingType())
3272 S.Diag(Attr.getLoc(), diag::err_mode_wrong_type);
3275 // FIXME: Sync this with InitializePredefinedMacros; we need to match int8_t
3276 // and friends, at least with glibc.
3277 // FIXME: Make sure 32/64-bit integers don't get defined to types of the wrong
3278 // width on unusual platforms.
3279 // FIXME: Make sure floating-point mappings are accurate
3280 // FIXME: Support XF and TF types
3282 switch (DestWidth) {
3284 S.Diag(Attr.getLoc(), diag::err_unknown_machine_mode) << Name;
3287 S.Diag(Attr.getLoc(), diag::err_unsupported_machine_mode) << Name;
3291 S.Diag(Attr.getLoc(), diag::err_unsupported_machine_mode) << Name;
3294 if (OldTy->isSignedIntegerType())
3295 NewTy = S.Context.SignedCharTy;
3297 NewTy = S.Context.UnsignedCharTy;
3301 S.Diag(Attr.getLoc(), diag::err_unsupported_machine_mode) << Name;
3304 if (OldTy->isSignedIntegerType())
3305 NewTy = S.Context.ShortTy;
3307 NewTy = S.Context.UnsignedShortTy;
3311 NewTy = S.Context.FloatTy;
3312 else if (OldTy->isSignedIntegerType())
3313 NewTy = S.Context.IntTy;
3315 NewTy = S.Context.UnsignedIntTy;
3319 NewTy = S.Context.DoubleTy;
3320 else if (OldTy->isSignedIntegerType())
3321 if (S.Context.getTargetInfo().getLongWidth() == 64)
3322 NewTy = S.Context.LongTy;
3324 NewTy = S.Context.LongLongTy;
3326 if (S.Context.getTargetInfo().getLongWidth() == 64)
3327 NewTy = S.Context.UnsignedLongTy;
3329 NewTy = S.Context.UnsignedLongLongTy;
3332 NewTy = S.Context.LongDoubleTy;
3336 S.Diag(Attr.getLoc(), diag::err_unsupported_machine_mode) << Name;
3339 if (OldTy->isSignedIntegerType())
3340 NewTy = S.Context.Int128Ty;
3342 NewTy = S.Context.UnsignedInt128Ty;
3347 NewTy = S.Context.getComplexType(NewTy);
3350 // Install the new type.
3351 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(D)) {
3352 // FIXME: preserve existing source info.
3353 TD->setTypeSourceInfo(S.Context.getTrivialTypeSourceInfo(NewTy));
3355 cast<ValueDecl>(D)->setType(NewTy);
3358 static void handleNoDebugAttr(Sema &S, Decl *D, const AttributeList &Attr) {
3359 // check the attribute arguments.
3360 if (!checkAttributeNumArgs(S, Attr, 0))
3363 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
3364 if (!VD->hasGlobalStorage())
3365 S.Diag(Attr.getLoc(),
3366 diag::warn_attribute_requires_functions_or_static_globals)
3368 } else if (!isFunctionOrMethod(D)) {
3369 S.Diag(Attr.getLoc(),
3370 diag::warn_attribute_requires_functions_or_static_globals)
3375 D->addAttr(::new (S.Context) NoDebugAttr(Attr.getRange(), S.Context));
3378 static void handleNoInlineAttr(Sema &S, Decl *D, const AttributeList &Attr) {
3379 // check the attribute arguments.
3380 if (!checkAttributeNumArgs(S, Attr, 0))
3384 if (!isa<FunctionDecl>(D)) {
3385 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
3386 << Attr.getName() << ExpectedFunction;
3390 D->addAttr(::new (S.Context) NoInlineAttr(Attr.getRange(), S.Context));
3393 static void handleNoInstrumentFunctionAttr(Sema &S, Decl *D,
3394 const AttributeList &Attr) {
3395 // check the attribute arguments.
3396 if (!checkAttributeNumArgs(S, Attr, 0))
3400 if (!isa<FunctionDecl>(D)) {
3401 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
3402 << Attr.getName() << ExpectedFunction;
3406 D->addAttr(::new (S.Context) NoInstrumentFunctionAttr(Attr.getRange(),
3410 static void handleConstantAttr(Sema &S, Decl *D, const AttributeList &Attr) {
3411 if (S.LangOpts.CUDA) {
3412 // check the attribute arguments.
3413 if (Attr.hasParameterOrArguments()) {
3414 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
3418 if (!isa<VarDecl>(D)) {
3419 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
3420 << Attr.getName() << ExpectedVariable;
3424 D->addAttr(::new (S.Context) CUDAConstantAttr(Attr.getRange(), S.Context));
3426 S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "constant";
3430 static void handleDeviceAttr(Sema &S, Decl *D, const AttributeList &Attr) {
3431 if (S.LangOpts.CUDA) {
3432 // check the attribute arguments.
3433 if (Attr.getNumArgs() != 0) {
3434 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
3438 if (!isa<FunctionDecl>(D) && !isa<VarDecl>(D)) {
3439 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
3440 << Attr.getName() << ExpectedVariableOrFunction;
3444 D->addAttr(::new (S.Context) CUDADeviceAttr(Attr.getRange(), S.Context));
3446 S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "device";
3450 static void handleGlobalAttr(Sema &S, Decl *D, const AttributeList &Attr) {
3451 if (S.LangOpts.CUDA) {
3452 // check the attribute arguments.
3453 if (!checkAttributeNumArgs(S, Attr, 0))
3456 if (!isa<FunctionDecl>(D)) {
3457 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
3458 << Attr.getName() << ExpectedFunction;
3462 FunctionDecl *FD = cast<FunctionDecl>(D);
3463 if (!FD->getResultType()->isVoidType()) {
3464 TypeLoc TL = FD->getTypeSourceInfo()->getTypeLoc().IgnoreParens();
3465 if (FunctionTypeLoc* FTL = dyn_cast<FunctionTypeLoc>(&TL)) {
3466 S.Diag(FD->getTypeSpecStartLoc(), diag::err_kern_type_not_void_return)
3468 << FixItHint::CreateReplacement(FTL->getResultLoc().getSourceRange(),
3471 S.Diag(FD->getTypeSpecStartLoc(), diag::err_kern_type_not_void_return)
3477 D->addAttr(::new (S.Context) CUDAGlobalAttr(Attr.getRange(), S.Context));
3479 S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "global";
3483 static void handleHostAttr(Sema &S, Decl *D, const AttributeList &Attr) {
3484 if (S.LangOpts.CUDA) {
3485 // check the attribute arguments.
3486 if (!checkAttributeNumArgs(S, Attr, 0))
3490 if (!isa<FunctionDecl>(D)) {
3491 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
3492 << Attr.getName() << ExpectedFunction;
3496 D->addAttr(::new (S.Context) CUDAHostAttr(Attr.getRange(), S.Context));
3498 S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "host";
3502 static void handleSharedAttr(Sema &S, Decl *D, const AttributeList &Attr) {
3503 if (S.LangOpts.CUDA) {
3504 // check the attribute arguments.
3505 if (!checkAttributeNumArgs(S, Attr, 0))
3509 if (!isa<VarDecl>(D)) {
3510 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
3511 << Attr.getName() << ExpectedVariable;
3515 D->addAttr(::new (S.Context) CUDASharedAttr(Attr.getRange(), S.Context));
3517 S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "shared";
3521 static void handleGNUInlineAttr(Sema &S, Decl *D, const AttributeList &Attr) {
3522 // check the attribute arguments.
3523 if (!checkAttributeNumArgs(S, Attr, 0))
3526 FunctionDecl *Fn = dyn_cast<FunctionDecl>(D);
3528 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
3529 << Attr.getName() << ExpectedFunction;
3533 if (!Fn->isInlineSpecified()) {
3534 S.Diag(Attr.getLoc(), diag::warn_gnu_inline_attribute_requires_inline);
3538 D->addAttr(::new (S.Context) GNUInlineAttr(Attr.getRange(), S.Context));
3541 static void handleCallConvAttr(Sema &S, Decl *D, const AttributeList &Attr) {
3542 if (hasDeclarator(D)) return;
3544 // Diagnostic is emitted elsewhere: here we store the (valid) Attr
3545 // in the Decl node for syntactic reasoning, e.g., pretty-printing.
3547 if (S.CheckCallingConvAttr(Attr, CC))
3550 if (!isa<ObjCMethodDecl>(D)) {
3551 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
3552 << Attr.getName() << ExpectedFunctionOrMethod;
3556 switch (Attr.getKind()) {
3557 case AttributeList::AT_FastCall:
3558 D->addAttr(::new (S.Context) FastCallAttr(Attr.getRange(), S.Context));
3560 case AttributeList::AT_StdCall:
3561 D->addAttr(::new (S.Context) StdCallAttr(Attr.getRange(), S.Context));
3563 case AttributeList::AT_ThisCall:
3564 D->addAttr(::new (S.Context) ThisCallAttr(Attr.getRange(), S.Context));
3566 case AttributeList::AT_CDecl:
3567 D->addAttr(::new (S.Context) CDeclAttr(Attr.getRange(), S.Context));
3569 case AttributeList::AT_Pascal:
3570 D->addAttr(::new (S.Context) PascalAttr(Attr.getRange(), S.Context));
3572 case AttributeList::AT_Pcs: {
3573 PcsAttr::PCSType PCS;
3576 PCS = PcsAttr::AAPCS;
3579 PCS = PcsAttr::AAPCS_VFP;
3582 llvm_unreachable("unexpected calling convention in pcs attribute");
3585 D->addAttr(::new (S.Context) PcsAttr(Attr.getRange(), S.Context, PCS));
3588 llvm_unreachable("unexpected attribute kind");
3592 static void handleOpenCLKernelAttr(Sema &S, Decl *D, const AttributeList &Attr){
3593 assert(!Attr.isInvalid());
3594 D->addAttr(::new (S.Context) OpenCLKernelAttr(Attr.getRange(), S.Context));
3597 bool Sema::CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC) {
3598 if (attr.isInvalid())
3601 unsigned ReqArgs = attr.getKind() == AttributeList::AT_Pcs ? 1 : 0;
3602 if (attr.getNumArgs() != ReqArgs || attr.getParameterName()) {
3603 Diag(attr.getLoc(), diag::err_attribute_wrong_number_arguments) << ReqArgs;
3608 // TODO: diagnose uses of these conventions on the wrong target. Or, better
3609 // move to TargetAttributesSema one day.
3610 switch (attr.getKind()) {
3611 case AttributeList::AT_CDecl: CC = CC_C; break;
3612 case AttributeList::AT_FastCall: CC = CC_X86FastCall; break;
3613 case AttributeList::AT_StdCall: CC = CC_X86StdCall; break;
3614 case AttributeList::AT_ThisCall: CC = CC_X86ThisCall; break;
3615 case AttributeList::AT_Pascal: CC = CC_X86Pascal; break;
3616 case AttributeList::AT_Pcs: {
3617 Expr *Arg = attr.getArg(0);
3618 StringLiteral *Str = dyn_cast<StringLiteral>(Arg);
3619 if (!Str || !Str->isAscii()) {
3620 Diag(attr.getLoc(), diag::err_attribute_argument_n_not_string)
3626 StringRef StrRef = Str->getString();
3627 if (StrRef == "aapcs") {
3630 } else if (StrRef == "aapcs-vfp") {
3636 Diag(attr.getLoc(), diag::err_invalid_pcs);
3639 default: llvm_unreachable("unexpected attribute kind");
3645 static void handleRegparmAttr(Sema &S, Decl *D, const AttributeList &Attr) {
3646 if (hasDeclarator(D)) return;
3649 if (S.CheckRegparmAttr(Attr, numParams))
3652 if (!isa<ObjCMethodDecl>(D)) {
3653 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
3654 << Attr.getName() << ExpectedFunctionOrMethod;
3658 D->addAttr(::new (S.Context) RegparmAttr(Attr.getRange(), S.Context, numParams));
3661 /// Checks a regparm attribute, returning true if it is ill-formed and
3662 /// otherwise setting numParams to the appropriate value.
3663 bool Sema::CheckRegparmAttr(const AttributeList &Attr, unsigned &numParams) {
3664 if (Attr.isInvalid())
3667 if (Attr.getNumArgs() != 1) {
3668 Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
3673 Expr *NumParamsExpr = Attr.getArg(0);
3674 llvm::APSInt NumParams(32);
3675 if (NumParamsExpr->isTypeDependent() || NumParamsExpr->isValueDependent() ||
3676 !NumParamsExpr->isIntegerConstantExpr(NumParams, Context)) {
3677 Diag(Attr.getLoc(), diag::err_attribute_argument_not_int)
3678 << "regparm" << NumParamsExpr->getSourceRange();
3683 if (Context.getTargetInfo().getRegParmMax() == 0) {
3684 Diag(Attr.getLoc(), diag::err_attribute_regparm_wrong_platform)
3685 << NumParamsExpr->getSourceRange();
3690 numParams = NumParams.getZExtValue();
3691 if (numParams > Context.getTargetInfo().getRegParmMax()) {
3692 Diag(Attr.getLoc(), diag::err_attribute_regparm_invalid_number)
3693 << Context.getTargetInfo().getRegParmMax() << NumParamsExpr->getSourceRange();
3701 static void handleLaunchBoundsAttr(Sema &S, Decl *D, const AttributeList &Attr){
3702 if (S.LangOpts.CUDA) {
3703 // check the attribute arguments.
3704 if (Attr.getNumArgs() != 1 && Attr.getNumArgs() != 2) {
3705 // FIXME: 0 is not okay.
3706 S.Diag(Attr.getLoc(), diag::err_attribute_too_many_arguments) << 2;
3710 if (!isFunctionOrMethod(D)) {
3711 S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
3712 << Attr.getName() << ExpectedFunctionOrMethod;
3716 Expr *MaxThreadsExpr = Attr.getArg(0);
3717 llvm::APSInt MaxThreads(32);
3718 if (MaxThreadsExpr->isTypeDependent() ||
3719 MaxThreadsExpr->isValueDependent() ||
3720 !MaxThreadsExpr->isIntegerConstantExpr(MaxThreads, S.Context)) {
3721 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int)
3722 << "launch_bounds" << 1 << MaxThreadsExpr->getSourceRange();
3726 llvm::APSInt MinBlocks(32);
3727 if (Attr.getNumArgs() > 1) {
3728 Expr *MinBlocksExpr = Attr.getArg(1);
3729 if (MinBlocksExpr->isTypeDependent() ||
3730 MinBlocksExpr->isValueDependent() ||
3731 !MinBlocksExpr->isIntegerConstantExpr(MinBlocks, S.Context)) {
3732 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int)
3733 << "launch_bounds" << 2 << MinBlocksExpr->getSourceRange();
3738 D->addAttr(::new (S.Context) CUDALaunchBoundsAttr(Attr.getRange(), S.Context,
3739 MaxThreads.getZExtValue(),
3740 MinBlocks.getZExtValue()));
3742 S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "launch_bounds";
3746 static void handleArgumentWithTypeTagAttr(Sema &S, Decl *D,
3747 const AttributeList &Attr) {
3748 StringRef AttrName = Attr.getName()->getName();
3749 if (!Attr.getParameterName()) {
3750 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_identifier)
3751 << Attr.getName() << /* arg num = */ 1;
3755 if (Attr.getNumArgs() != 2) {
3756 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments)
3757 << /* required args = */ 3;
3761 IdentifierInfo *ArgumentKind = Attr.getParameterName();
3763 if (!isFunctionOrMethod(D) || !hasFunctionProto(D)) {
3764 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_decl_type)
3765 << Attr.getName() << ExpectedFunctionOrMethod;
3769 uint64_t ArgumentIdx;
3770 if (!checkFunctionOrMethodArgumentIndex(S, D, AttrName,
3772 Attr.getArg(0), ArgumentIdx))
3775 uint64_t TypeTagIdx;
3776 if (!checkFunctionOrMethodArgumentIndex(S, D, AttrName,
3778 Attr.getArg(1), TypeTagIdx))
3781 bool IsPointer = (AttrName == "pointer_with_type_tag");
3783 // Ensure that buffer has a pointer type.
3784 QualType BufferTy = getFunctionOrMethodArgType(D, ArgumentIdx);
3785 if (!BufferTy->isPointerType()) {
3786 S.Diag(Attr.getLoc(), diag::err_attribute_pointers_only)
3791 D->addAttr(::new (S.Context) ArgumentWithTypeTagAttr(Attr.getRange(),
3799 static void handleTypeTagForDatatypeAttr(Sema &S, Decl *D,
3800 const AttributeList &Attr) {
3801 IdentifierInfo *PointerKind = Attr.getParameterName();
3803 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_identifier)
3804 << "type_tag_for_datatype" << 1;
3808 QualType MatchingCType = S.GetTypeFromParser(Attr.getMatchingCType(), NULL);
3810 D->addAttr(::new (S.Context) TypeTagForDatatypeAttr(
3815 Attr.getLayoutCompatible(),
3816 Attr.getMustBeNull()));
3819 //===----------------------------------------------------------------------===//
3820 // Checker-specific attribute handlers.
3821 //===----------------------------------------------------------------------===//
3823 static bool isValidSubjectOfNSAttribute(Sema &S, QualType type) {
3824 return type->isDependentType() ||
3825 type->isObjCObjectPointerType() ||
3826 S.Context.isObjCNSObjectType(type);
3828 static bool isValidSubjectOfCFAttribute(Sema &S, QualType type) {
3829 return type->isDependentType() ||
3830 type->isPointerType() ||
3831 isValidSubjectOfNSAttribute(S, type);
3834 static void handleNSConsumedAttr(Sema &S, Decl *D, const AttributeList &Attr) {
3835 ParmVarDecl *param = dyn_cast<ParmVarDecl>(D);
3837 S.Diag(D->getLocStart(), diag::warn_attribute_wrong_decl_type)
3838 << Attr.getRange() << Attr.getName() << ExpectedParameter;
3843 if (Attr.getKind() == AttributeList::AT_NSConsumed) {
3844 typeOK = isValidSubjectOfNSAttribute(S, param->getType());
3847 typeOK = isValidSubjectOfCFAttribute(S, param->getType());
3852 S.Diag(D->getLocStart(), diag::warn_ns_attribute_wrong_parameter_type)
3853 << Attr.getRange() << Attr.getName() << cf;
3858 param->addAttr(::new (S.Context) CFConsumedAttr(Attr.getRange(), S.Context));
3860 param->addAttr(::new (S.Context) NSConsumedAttr(Attr.getRange(), S.Context));
3863 static void handleNSConsumesSelfAttr(Sema &S, Decl *D,
3864 const AttributeList &Attr) {
3865 if (!isa<ObjCMethodDecl>(D)) {
3866 S.Diag(D->getLocStart(), diag::warn_attribute_wrong_decl_type)
3867 << Attr.getRange() << Attr.getName() << ExpectedMethod;
3871 D->addAttr(::new (S.Context) NSConsumesSelfAttr(Attr.getRange(), S.Context));
3874 static void handleNSReturnsRetainedAttr(Sema &S, Decl *D,
3875 const AttributeList &Attr) {
3877 QualType returnType;
3879 if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D))
3880 returnType = MD->getResultType();
3881 else if (ObjCPropertyDecl *PD = dyn_cast<ObjCPropertyDecl>(D))
3882 returnType = PD->getType();
3883 else if (S.getLangOpts().ObjCAutoRefCount && hasDeclarator(D) &&
3884 (Attr.getKind() == AttributeList::AT_NSReturnsRetained))
3885 return; // ignore: was handled as a type attribute
3886 else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
3887 returnType = FD->getResultType();
3889 S.Diag(D->getLocStart(), diag::warn_attribute_wrong_decl_type)
3890 << Attr.getRange() << Attr.getName()
3891 << ExpectedFunctionOrMethod;
3897 switch (Attr.getKind()) {
3898 default: llvm_unreachable("invalid ownership attribute");
3899 case AttributeList::AT_NSReturnsAutoreleased:
3900 case AttributeList::AT_NSReturnsRetained:
3901 case AttributeList::AT_NSReturnsNotRetained:
3902 typeOK = isValidSubjectOfNSAttribute(S, returnType);
3906 case AttributeList::AT_CFReturnsRetained:
3907 case AttributeList::AT_CFReturnsNotRetained:
3908 typeOK = isValidSubjectOfCFAttribute(S, returnType);
3914 S.Diag(D->getLocStart(), diag::warn_ns_attribute_wrong_return_type)
3915 << Attr.getRange() << Attr.getName() << isa<ObjCMethodDecl>(D) << cf;
3919 switch (Attr.getKind()) {
3921 llvm_unreachable("invalid ownership attribute");
3922 case AttributeList::AT_NSReturnsAutoreleased:
3923 D->addAttr(::new (S.Context) NSReturnsAutoreleasedAttr(Attr.getRange(),
3926 case AttributeList::AT_CFReturnsNotRetained:
3927 D->addAttr(::new (S.Context) CFReturnsNotRetainedAttr(Attr.getRange(),
3930 case AttributeList::AT_NSReturnsNotRetained:
3931 D->addAttr(::new (S.Context) NSReturnsNotRetainedAttr(Attr.getRange(),
3934 case AttributeList::AT_CFReturnsRetained:
3935 D->addAttr(::new (S.Context) CFReturnsRetainedAttr(Attr.getRange(),
3938 case AttributeList::AT_NSReturnsRetained:
3939 D->addAttr(::new (S.Context) NSReturnsRetainedAttr(Attr.getRange(),
3945 static void handleObjCReturnsInnerPointerAttr(Sema &S, Decl *D,
3946 const AttributeList &attr) {
3947 SourceLocation loc = attr.getLoc();
3949 ObjCMethodDecl *method = dyn_cast<ObjCMethodDecl>(D);
3952 S.Diag(D->getLocStart(), diag::err_attribute_wrong_decl_type)
3953 << SourceRange(loc, loc) << attr.getName() << ExpectedMethod;
3957 // Check that the method returns a normal pointer.
3958 QualType resultType = method->getResultType();
3960 if (!resultType->isReferenceType() &&
3961 (!resultType->isPointerType() || resultType->isObjCRetainableType())) {
3962 S.Diag(method->getLocStart(), diag::warn_ns_attribute_wrong_return_type)
3964 << attr.getName() << /*method*/ 1 << /*non-retainable pointer*/ 2;
3966 // Drop the attribute.
3971 ::new (S.Context) ObjCReturnsInnerPointerAttr(attr.getRange(), S.Context));
3974 /// Handle cf_audited_transfer and cf_unknown_transfer.
3975 static void handleCFTransferAttr(Sema &S, Decl *D, const AttributeList &A) {
3976 if (!isa<FunctionDecl>(D)) {
3977 S.Diag(D->getLocStart(), diag::err_attribute_wrong_decl_type)
3978 << A.getRange() << A.getName() << ExpectedFunction;
3982 bool IsAudited = (A.getKind() == AttributeList::AT_CFAuditedTransfer);
3984 // Check whether there's a conflicting attribute already present.
3987 Existing = D->getAttr<CFUnknownTransferAttr>();
3989 Existing = D->getAttr<CFAuditedTransferAttr>();
3992 S.Diag(D->getLocStart(), diag::err_attributes_are_not_compatible)
3994 << (IsAudited ? "cf_unknown_transfer" : "cf_audited_transfer")
3995 << A.getRange() << Existing->getRange();
3999 // All clear; add the attribute.
4002 ::new (S.Context) CFAuditedTransferAttr(A.getRange(), S.Context));
4005 ::new (S.Context) CFUnknownTransferAttr(A.getRange(), S.Context));
4009 static void handleNSBridgedAttr(Sema &S, Scope *Sc, Decl *D,
4010 const AttributeList &Attr) {
4011 RecordDecl *RD = dyn_cast<RecordDecl>(D);
4012 if (!RD || RD->isUnion()) {
4013 S.Diag(D->getLocStart(), diag::err_attribute_wrong_decl_type)
4014 << Attr.getRange() << Attr.getName() << ExpectedStruct;
4017 IdentifierInfo *ParmName = Attr.getParameterName();
4019 // In Objective-C, verify that the type names an Objective-C type.
4020 // We don't want to check this outside of ObjC because people sometimes
4021 // do crazy C declarations of Objective-C types.
4022 if (ParmName && S.getLangOpts().ObjC1) {
4023 // Check for an existing type with this name.
4024 LookupResult R(S, DeclarationName(ParmName), Attr.getParameterLoc(),
4025 Sema::LookupOrdinaryName);
4026 if (S.LookupName(R, Sc)) {
4027 NamedDecl *Target = R.getFoundDecl();
4028 if (Target && !isa<ObjCInterfaceDecl>(Target)) {
4029 S.Diag(D->getLocStart(), diag::err_ns_bridged_not_interface);
4030 S.Diag(Target->getLocStart(), diag::note_declared_at);
4035 D->addAttr(::new (S.Context) NSBridgedAttr(Attr.getRange(), S.Context,
4039 static void handleObjCOwnershipAttr(Sema &S, Decl *D,
4040 const AttributeList &Attr) {
4041 if (hasDeclarator(D)) return;
4043 S.Diag(D->getLocStart(), diag::err_attribute_wrong_decl_type)
4044 << Attr.getRange() << Attr.getName() << ExpectedVariable;
4047 static void handleObjCPreciseLifetimeAttr(Sema &S, Decl *D,
4048 const AttributeList &Attr) {
4049 if (!isa<VarDecl>(D) && !isa<FieldDecl>(D)) {
4050 S.Diag(D->getLocStart(), diag::err_attribute_wrong_decl_type)
4051 << Attr.getRange() << Attr.getName() << ExpectedVariable;
4055 ValueDecl *vd = cast<ValueDecl>(D);
4056 QualType type = vd->getType();
4058 if (!type->isDependentType() &&
4059 !type->isObjCLifetimeType()) {
4060 S.Diag(Attr.getLoc(), diag::err_objc_precise_lifetime_bad_type)
4065 Qualifiers::ObjCLifetime lifetime = type.getObjCLifetime();
4067 // If we have no lifetime yet, check the lifetime we're presumably
4069 if (lifetime == Qualifiers::OCL_None && !type->isDependentType())
4070 lifetime = type->getObjCARCImplicitLifetime();
4073 case Qualifiers::OCL_None:
4074 assert(type->isDependentType() &&
4075 "didn't infer lifetime for non-dependent type?");
4078 case Qualifiers::OCL_Weak: // meaningful
4079 case Qualifiers::OCL_Strong: // meaningful
4082 case Qualifiers::OCL_ExplicitNone:
4083 case Qualifiers::OCL_Autoreleasing:
4084 S.Diag(Attr.getLoc(), diag::warn_objc_precise_lifetime_meaningless)
4085 << (lifetime == Qualifiers::OCL_Autoreleasing);
4089 D->addAttr(::new (S.Context)
4090 ObjCPreciseLifetimeAttr(Attr.getRange(), S.Context));
4093 //===----------------------------------------------------------------------===//
4094 // Microsoft specific attribute handlers.
4095 //===----------------------------------------------------------------------===//
4097 static void handleUuidAttr(Sema &S, Decl *D, const AttributeList &Attr) {
4098 if (S.LangOpts.MicrosoftExt || S.LangOpts.Borland) {
4099 // check the attribute arguments.
4100 if (!checkAttributeNumArgs(S, Attr, 1))
4103 Expr *Arg = Attr.getArg(0);
4104 StringLiteral *Str = dyn_cast<StringLiteral>(Arg);
4105 if (!Str || !Str->isAscii()) {
4106 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string)
4111 StringRef StrRef = Str->getString();
4113 bool IsCurly = StrRef.size() > 1 && StrRef.front() == '{' &&
4114 StrRef.back() == '}';
4116 // Validate GUID length.
4117 if (IsCurly && StrRef.size() != 38) {
4118 S.Diag(Attr.getLoc(), diag::err_attribute_uuid_malformed_guid);
4121 if (!IsCurly && StrRef.size() != 36) {
4122 S.Diag(Attr.getLoc(), diag::err_attribute_uuid_malformed_guid);
4126 // GUID format is "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX" or
4127 // "{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}"
4128 StringRef::iterator I = StrRef.begin();
4129 if (IsCurly) // Skip the optional '{'
4132 for (int i = 0; i < 36; ++i) {
4133 if (i == 8 || i == 13 || i == 18 || i == 23) {
4135 S.Diag(Attr.getLoc(), diag::err_attribute_uuid_malformed_guid);
4138 } else if (!isxdigit(*I)) {
4139 S.Diag(Attr.getLoc(), diag::err_attribute_uuid_malformed_guid);
4145 D->addAttr(::new (S.Context) UuidAttr(Attr.getRange(), S.Context,
4148 S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "uuid";
4151 static void handleInheritanceAttr(Sema &S, Decl *D, const AttributeList &Attr) {
4152 if (S.LangOpts.MicrosoftExt) {
4153 AttributeList::Kind Kind = Attr.getKind();
4154 if (Kind == AttributeList::AT_SingleInheritance)
4156 ::new (S.Context) SingleInheritanceAttr(Attr.getRange(), S.Context));
4157 else if (Kind == AttributeList::AT_MultipleInheritance)
4159 ::new (S.Context) MultipleInheritanceAttr(Attr.getRange(), S.Context));
4160 else if (Kind == AttributeList::AT_VirtualInheritance)
4162 ::new (S.Context) VirtualInheritanceAttr(Attr.getRange(), S.Context));
4164 S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << Attr.getName();
4167 static void handlePortabilityAttr(Sema &S, Decl *D, const AttributeList &Attr) {
4168 if (S.LangOpts.MicrosoftExt) {
4169 AttributeList::Kind Kind = Attr.getKind();
4170 if (Kind == AttributeList::AT_Ptr32)
4172 ::new (S.Context) Ptr32Attr(Attr.getRange(), S.Context));
4173 else if (Kind == AttributeList::AT_Ptr64)
4175 ::new (S.Context) Ptr64Attr(Attr.getRange(), S.Context));
4176 else if (Kind == AttributeList::AT_Win64)
4178 ::new (S.Context) Win64Attr(Attr.getRange(), S.Context));
4180 S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << Attr.getName();
4183 static void handleForceInlineAttr(Sema &S, Decl *D, const AttributeList &Attr) {
4184 if (S.LangOpts.MicrosoftExt)
4185 D->addAttr(::new (S.Context) ForceInlineAttr(Attr.getRange(), S.Context));
4187 S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << Attr.getName();
4190 //===----------------------------------------------------------------------===//
4191 // Top Level Sema Entry Points
4192 //===----------------------------------------------------------------------===//
4194 static void ProcessNonInheritableDeclAttr(Sema &S, Scope *scope, Decl *D,
4195 const AttributeList &Attr) {
4196 switch (Attr.getKind()) {
4197 case AttributeList::AT_CUDADevice: handleDeviceAttr (S, D, Attr); break;
4198 case AttributeList::AT_CUDAHost: handleHostAttr (S, D, Attr); break;
4199 case AttributeList::AT_Overloadable:handleOverloadableAttr(S, D, Attr); break;
4205 static void ProcessInheritableDeclAttr(Sema &S, Scope *scope, Decl *D,
4206 const AttributeList &Attr) {
4207 switch (Attr.getKind()) {
4208 case AttributeList::AT_IBAction: handleIBAction(S, D, Attr); break;
4209 case AttributeList::AT_IBOutlet: handleIBOutlet(S, D, Attr); break;
4210 case AttributeList::AT_IBOutletCollection:
4211 handleIBOutletCollection(S, D, Attr); break;
4212 case AttributeList::AT_AddressSpace:
4213 case AttributeList::AT_OpenCLImageAccess:
4214 case AttributeList::AT_ObjCGC:
4215 case AttributeList::AT_VectorSize:
4216 case AttributeList::AT_NeonVectorType:
4217 case AttributeList::AT_NeonPolyVectorType:
4218 // Ignore these, these are type attributes, handled by
4219 // ProcessTypeAttributes.
4221 case AttributeList::AT_CUDADevice:
4222 case AttributeList::AT_CUDAHost:
4223 case AttributeList::AT_Overloadable:
4224 // Ignore, this is a non-inheritable attribute, handled
4225 // by ProcessNonInheritableDeclAttr.
4227 case AttributeList::AT_Alias: handleAliasAttr (S, D, Attr); break;
4228 case AttributeList::AT_Aligned: handleAlignedAttr (S, D, Attr); break;
4229 case AttributeList::AT_AllocSize: handleAllocSizeAttr (S, D, Attr); break;
4230 case AttributeList::AT_AlwaysInline:
4231 handleAlwaysInlineAttr (S, D, Attr); break;
4232 case AttributeList::AT_AnalyzerNoReturn:
4233 handleAnalyzerNoReturnAttr (S, D, Attr); break;
4234 case AttributeList::AT_TLSModel: handleTLSModelAttr (S, D, Attr); break;
4235 case AttributeList::AT_Annotate: handleAnnotateAttr (S, D, Attr); break;
4236 case AttributeList::AT_Availability:handleAvailabilityAttr(S, D, Attr); break;
4237 case AttributeList::AT_CarriesDependency:
4238 handleDependencyAttr (S, D, Attr); break;
4239 case AttributeList::AT_Common: handleCommonAttr (S, D, Attr); break;
4240 case AttributeList::AT_CUDAConstant:handleConstantAttr (S, D, Attr); break;
4241 case AttributeList::AT_Constructor: handleConstructorAttr (S, D, Attr); break;
4242 case AttributeList::AT_Deprecated:
4243 handleAttrWithMessage<DeprecatedAttr>(S, D, Attr, "deprecated");
4245 case AttributeList::AT_Destructor: handleDestructorAttr (S, D, Attr); break;
4246 case AttributeList::AT_ExtVectorType:
4247 handleExtVectorTypeAttr(S, scope, D, Attr);
4249 case AttributeList::AT_Format: handleFormatAttr (S, D, Attr); break;
4250 case AttributeList::AT_FormatArg: handleFormatArgAttr (S, D, Attr); break;
4251 case AttributeList::AT_CUDAGlobal: handleGlobalAttr (S, D, Attr); break;
4252 case AttributeList::AT_GNUInline: handleGNUInlineAttr (S, D, Attr); break;
4253 case AttributeList::AT_CUDALaunchBounds:
4254 handleLaunchBoundsAttr(S, D, Attr);
4256 case AttributeList::AT_Mode: handleModeAttr (S, D, Attr); break;
4257 case AttributeList::AT_Malloc: handleMallocAttr (S, D, Attr); break;
4258 case AttributeList::AT_MayAlias: handleMayAliasAttr (S, D, Attr); break;
4259 case AttributeList::AT_NoCommon: handleNoCommonAttr (S, D, Attr); break;
4260 case AttributeList::AT_NonNull: handleNonNullAttr (S, D, Attr); break;
4261 case AttributeList::AT_ownership_returns:
4262 case AttributeList::AT_ownership_takes:
4263 case AttributeList::AT_ownership_holds:
4264 handleOwnershipAttr (S, D, Attr); break;
4265 case AttributeList::AT_Cold: handleColdAttr (S, D, Attr); break;
4266 case AttributeList::AT_Hot: handleHotAttr (S, D, Attr); break;
4267 case AttributeList::AT_Naked: handleNakedAttr (S, D, Attr); break;
4268 case AttributeList::AT_NoReturn: handleNoReturnAttr (S, D, Attr); break;
4269 case AttributeList::AT_NoThrow: handleNothrowAttr (S, D, Attr); break;
4270 case AttributeList::AT_CUDAShared: handleSharedAttr (S, D, Attr); break;
4271 case AttributeList::AT_VecReturn: handleVecReturnAttr (S, D, Attr); break;
4273 case AttributeList::AT_ObjCOwnership:
4274 handleObjCOwnershipAttr(S, D, Attr); break;
4275 case AttributeList::AT_ObjCPreciseLifetime:
4276 handleObjCPreciseLifetimeAttr(S, D, Attr); break;
4278 case AttributeList::AT_ObjCReturnsInnerPointer:
4279 handleObjCReturnsInnerPointerAttr(S, D, Attr); break;
4281 case AttributeList::AT_NSBridged:
4282 handleNSBridgedAttr(S, scope, D, Attr); break;
4284 case AttributeList::AT_CFAuditedTransfer:
4285 case AttributeList::AT_CFUnknownTransfer:
4286 handleCFTransferAttr(S, D, Attr); break;
4288 // Checker-specific.
4289 case AttributeList::AT_CFConsumed:
4290 case AttributeList::AT_NSConsumed: handleNSConsumedAttr (S, D, Attr); break;
4291 case AttributeList::AT_NSConsumesSelf:
4292 handleNSConsumesSelfAttr(S, D, Attr); break;
4294 case AttributeList::AT_NSReturnsAutoreleased:
4295 case AttributeList::AT_NSReturnsNotRetained:
4296 case AttributeList::AT_CFReturnsNotRetained:
4297 case AttributeList::AT_NSReturnsRetained:
4298 case AttributeList::AT_CFReturnsRetained:
4299 handleNSReturnsRetainedAttr(S, D, Attr); break;
4301 case AttributeList::AT_WorkGroupSizeHint:
4302 case AttributeList::AT_ReqdWorkGroupSize:
4303 handleWorkGroupSize(S, D, Attr); break;
4305 case AttributeList::AT_InitPriority:
4306 handleInitPriorityAttr(S, D, Attr); break;
4308 case AttributeList::AT_Packed: handlePackedAttr (S, D, Attr); break;
4309 case AttributeList::AT_Section: handleSectionAttr (S, D, Attr); break;
4310 case AttributeList::AT_Unavailable:
4311 handleAttrWithMessage<UnavailableAttr>(S, D, Attr, "unavailable");
4313 case AttributeList::AT_ArcWeakrefUnavailable:
4314 handleArcWeakrefUnavailableAttr (S, D, Attr);
4316 case AttributeList::AT_ObjCRootClass:
4317 handleObjCRootClassAttr(S, D, Attr);
4319 case AttributeList::AT_ObjCRequiresPropertyDefs:
4320 handleObjCRequiresPropertyDefsAttr (S, D, Attr);
4322 case AttributeList::AT_Unused: handleUnusedAttr (S, D, Attr); break;
4323 case AttributeList::AT_ReturnsTwice:
4324 handleReturnsTwiceAttr(S, D, Attr);
4326 case AttributeList::AT_Used: handleUsedAttr (S, D, Attr); break;
4327 case AttributeList::AT_Visibility: handleVisibilityAttr (S, D, Attr); break;
4328 case AttributeList::AT_WarnUnusedResult: handleWarnUnusedResult(S, D, Attr);
4330 case AttributeList::AT_Weak: handleWeakAttr (S, D, Attr); break;
4331 case AttributeList::AT_WeakRef: handleWeakRefAttr (S, D, Attr); break;
4332 case AttributeList::AT_WeakImport: handleWeakImportAttr (S, D, Attr); break;
4333 case AttributeList::AT_TransparentUnion:
4334 handleTransparentUnionAttr(S, D, Attr);
4336 case AttributeList::AT_ObjCException:
4337 handleObjCExceptionAttr(S, D, Attr);
4339 case AttributeList::AT_ObjCMethodFamily:
4340 handleObjCMethodFamilyAttr(S, D, Attr);
4342 case AttributeList::AT_ObjCNSObject:handleObjCNSObject (S, D, Attr); break;
4343 case AttributeList::AT_Blocks: handleBlocksAttr (S, D, Attr); break;
4344 case AttributeList::AT_Sentinel: handleSentinelAttr (S, D, Attr); break;
4345 case AttributeList::AT_Const: handleConstAttr (S, D, Attr); break;
4346 case AttributeList::AT_Pure: handlePureAttr (S, D, Attr); break;
4347 case AttributeList::AT_Cleanup: handleCleanupAttr (S, D, Attr); break;
4348 case AttributeList::AT_NoDebug: handleNoDebugAttr (S, D, Attr); break;
4349 case AttributeList::AT_NoInline: handleNoInlineAttr (S, D, Attr); break;
4350 case AttributeList::AT_Regparm: handleRegparmAttr (S, D, Attr); break;
4351 case AttributeList::IgnoredAttribute:
4354 case AttributeList::AT_NoInstrumentFunction: // Interacts with -pg.
4355 handleNoInstrumentFunctionAttr(S, D, Attr);
4357 case AttributeList::AT_StdCall:
4358 case AttributeList::AT_CDecl:
4359 case AttributeList::AT_FastCall:
4360 case AttributeList::AT_ThisCall:
4361 case AttributeList::AT_Pascal:
4362 case AttributeList::AT_Pcs:
4363 handleCallConvAttr(S, D, Attr);
4365 case AttributeList::AT_OpenCLKernel:
4366 handleOpenCLKernelAttr(S, D, Attr);
4369 // Microsoft attributes:
4370 case AttributeList::AT_MsStruct:
4371 handleMsStructAttr(S, D, Attr);
4373 case AttributeList::AT_Uuid:
4374 handleUuidAttr(S, D, Attr);
4376 case AttributeList::AT_SingleInheritance:
4377 case AttributeList::AT_MultipleInheritance:
4378 case AttributeList::AT_VirtualInheritance:
4379 handleInheritanceAttr(S, D, Attr);
4381 case AttributeList::AT_Win64:
4382 case AttributeList::AT_Ptr32:
4383 case AttributeList::AT_Ptr64:
4384 handlePortabilityAttr(S, D, Attr);
4386 case AttributeList::AT_ForceInline:
4387 handleForceInlineAttr(S, D, Attr);
4390 // Thread safety attributes:
4391 case AttributeList::AT_GuardedVar:
4392 handleGuardedVarAttr(S, D, Attr);
4394 case AttributeList::AT_PtGuardedVar:
4395 handlePtGuardedVarAttr(S, D, Attr);
4397 case AttributeList::AT_ScopedLockable:
4398 handleScopedLockableAttr(S, D, Attr);
4400 case AttributeList::AT_NoAddressSafetyAnalysis:
4401 handleNoAddressSafetyAttr(S, D, Attr);
4403 case AttributeList::AT_NoThreadSafetyAnalysis:
4404 handleNoThreadSafetyAttr(S, D, Attr);
4406 case AttributeList::AT_Lockable:
4407 handleLockableAttr(S, D, Attr);
4409 case AttributeList::AT_GuardedBy:
4410 handleGuardedByAttr(S, D, Attr);
4412 case AttributeList::AT_PtGuardedBy:
4413 handlePtGuardedByAttr(S, D, Attr);
4415 case AttributeList::AT_ExclusiveLockFunction:
4416 handleExclusiveLockFunctionAttr(S, D, Attr);
4418 case AttributeList::AT_ExclusiveLocksRequired:
4419 handleExclusiveLocksRequiredAttr(S, D, Attr);
4421 case AttributeList::AT_ExclusiveTrylockFunction:
4422 handleExclusiveTrylockFunctionAttr(S, D, Attr);
4424 case AttributeList::AT_LockReturned:
4425 handleLockReturnedAttr(S, D, Attr);
4427 case AttributeList::AT_LocksExcluded:
4428 handleLocksExcludedAttr(S, D, Attr);
4430 case AttributeList::AT_SharedLockFunction:
4431 handleSharedLockFunctionAttr(S, D, Attr);
4433 case AttributeList::AT_SharedLocksRequired:
4434 handleSharedLocksRequiredAttr(S, D, Attr);
4436 case AttributeList::AT_SharedTrylockFunction:
4437 handleSharedTrylockFunctionAttr(S, D, Attr);
4439 case AttributeList::AT_UnlockFunction:
4440 handleUnlockFunAttr(S, D, Attr);
4442 case AttributeList::AT_AcquiredBefore:
4443 handleAcquiredBeforeAttr(S, D, Attr);
4445 case AttributeList::AT_AcquiredAfter:
4446 handleAcquiredAfterAttr(S, D, Attr);
4449 // Type safety attributes.
4450 case AttributeList::AT_ArgumentWithTypeTag:
4451 handleArgumentWithTypeTagAttr(S, D, Attr);
4453 case AttributeList::AT_TypeTagForDatatype:
4454 handleTypeTagForDatatypeAttr(S, D, Attr);
4458 // Ask target about the attribute.
4459 const TargetAttributesSema &TargetAttrs = S.getTargetAttributesSema();
4460 if (!TargetAttrs.ProcessDeclAttribute(scope, D, Attr, S))
4461 S.Diag(Attr.getLoc(), Attr.isDeclspecAttribute() ?
4462 diag::warn_unhandled_ms_attribute_ignored :
4463 diag::warn_unknown_attribute_ignored) << Attr.getName();
4468 /// ProcessDeclAttribute - Apply the specific attribute to the specified decl if
4469 /// the attribute applies to decls. If the attribute is a type attribute, just
4470 /// silently ignore it if a GNU attribute. FIXME: Applying a C++0x attribute to
4471 /// the wrong thing is illegal (C++0x [dcl.attr.grammar]/4).
4472 static void ProcessDeclAttribute(Sema &S, Scope *scope, Decl *D,
4473 const AttributeList &Attr,
4474 bool NonInheritable, bool Inheritable) {
4475 if (Attr.isInvalid())
4478 // Type attributes are still treated as declaration attributes by
4479 // ParseMicrosoftTypeAttributes and ParseBorlandTypeAttributes. We don't
4480 // want to process them, however, because we will simply warn about ignoring
4481 // them. So instead, we will bail out early.
4482 if (Attr.isMSTypespecAttribute())
4486 ProcessNonInheritableDeclAttr(S, scope, D, Attr);
4489 ProcessInheritableDeclAttr(S, scope, D, Attr);
4492 /// ProcessDeclAttributeList - Apply all the decl attributes in the specified
4493 /// attribute list to the specified decl, ignoring any type attributes.
4494 void Sema::ProcessDeclAttributeList(Scope *S, Decl *D,
4495 const AttributeList *AttrList,
4496 bool NonInheritable, bool Inheritable) {
4497 for (const AttributeList* l = AttrList; l; l = l->getNext()) {
4498 ProcessDeclAttribute(*this, S, D, *l, NonInheritable, Inheritable);
4502 // static int a9 __attribute__((weakref));
4503 // but that looks really pointless. We reject it.
4504 if (Inheritable && D->hasAttr<WeakRefAttr>() && !D->hasAttr<AliasAttr>()) {
4505 Diag(AttrList->getLoc(), diag::err_attribute_weakref_without_alias) <<
4506 dyn_cast<NamedDecl>(D)->getNameAsString();
4511 // Annotation attributes are the only attributes allowed after an access
4513 bool Sema::ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl,
4514 const AttributeList *AttrList) {
4515 for (const AttributeList* l = AttrList; l; l = l->getNext()) {
4516 if (l->getKind() == AttributeList::AT_Annotate) {
4517 handleAnnotateAttr(*this, ASDecl, *l);
4519 Diag(l->getLoc(), diag::err_only_annotate_after_access_spec);
4527 /// checkUnusedDeclAttributes - Check a list of attributes to see if it
4528 /// contains any decl attributes that we should warn about.
4529 static void checkUnusedDeclAttributes(Sema &S, const AttributeList *A) {
4530 for ( ; A; A = A->getNext()) {
4531 // Only warn if the attribute is an unignored, non-type attribute.
4532 if (A->isUsedAsTypeAttr()) continue;
4533 if (A->getKind() == AttributeList::IgnoredAttribute) continue;
4535 if (A->getKind() == AttributeList::UnknownAttribute) {
4536 S.Diag(A->getLoc(), diag::warn_unknown_attribute_ignored)
4537 << A->getName() << A->getRange();
4539 S.Diag(A->getLoc(), diag::warn_attribute_not_on_decl)
4540 << A->getName() << A->getRange();
4545 /// checkUnusedDeclAttributes - Given a declarator which is not being
4546 /// used to build a declaration, complain about any decl attributes
4547 /// which might be lying around on it.
4548 void Sema::checkUnusedDeclAttributes(Declarator &D) {
4549 ::checkUnusedDeclAttributes(*this, D.getDeclSpec().getAttributes().getList());
4550 ::checkUnusedDeclAttributes(*this, D.getAttributes());
4551 for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i)
4552 ::checkUnusedDeclAttributes(*this, D.getTypeObject(i).getAttrs());
4555 /// DeclClonePragmaWeak - clone existing decl (maybe definition),
4556 /// \#pragma weak needs a non-definition decl and source may not have one.
4557 NamedDecl * Sema::DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II,
4558 SourceLocation Loc) {
4559 assert(isa<FunctionDecl>(ND) || isa<VarDecl>(ND));
4560 NamedDecl *NewD = 0;
4561 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
4562 FunctionDecl *NewFD;
4563 // FIXME: Missing call to CheckFunctionDeclaration().
4565 // FIXME: Is the qualifier info correct?
4566 // FIXME: Is the DeclContext correct?
4567 NewFD = FunctionDecl::Create(FD->getASTContext(), FD->getDeclContext(),
4568 Loc, Loc, DeclarationName(II),
4569 FD->getType(), FD->getTypeSourceInfo(),
4571 false/*isInlineSpecified*/,
4573 false/*isConstexprSpecified*/);
4576 if (FD->getQualifier())
4577 NewFD->setQualifierInfo(FD->getQualifierLoc());
4579 // Fake up parameter variables; they are declared as if this were
4581 QualType FDTy = FD->getType();
4582 if (const FunctionProtoType *FT = FDTy->getAs<FunctionProtoType>()) {
4583 SmallVector<ParmVarDecl*, 16> Params;
4584 for (FunctionProtoType::arg_type_iterator AI = FT->arg_type_begin(),
4585 AE = FT->arg_type_end(); AI != AE; ++AI) {
4586 ParmVarDecl *Param = BuildParmVarDeclForTypedef(NewFD, Loc, *AI);
4587 Param->setScopeInfo(0, Params.size());
4588 Params.push_back(Param);
4590 NewFD->setParams(Params);
4592 } else if (VarDecl *VD = dyn_cast<VarDecl>(ND)) {
4593 NewD = VarDecl::Create(VD->getASTContext(), VD->getDeclContext(),
4594 VD->getInnerLocStart(), VD->getLocation(), II,
4595 VD->getType(), VD->getTypeSourceInfo(),
4596 VD->getStorageClass(),
4597 VD->getStorageClassAsWritten());
4598 if (VD->getQualifier()) {
4599 VarDecl *NewVD = cast<VarDecl>(NewD);
4600 NewVD->setQualifierInfo(VD->getQualifierLoc());
4606 /// DeclApplyPragmaWeak - A declaration (maybe definition) needs \#pragma weak
4607 /// applied to it, possibly with an alias.
4608 void Sema::DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W) {
4609 if (W.getUsed()) return; // only do this once
4611 if (W.getAlias()) { // clone decl, impersonate __attribute(weak,alias(...))
4612 IdentifierInfo *NDId = ND->getIdentifier();
4613 NamedDecl *NewD = DeclClonePragmaWeak(ND, W.getAlias(), W.getLocation());
4614 NewD->addAttr(::new (Context) AliasAttr(W.getLocation(), Context,
4616 NewD->addAttr(::new (Context) WeakAttr(W.getLocation(), Context));
4617 WeakTopLevelDecl.push_back(NewD);
4618 // FIXME: "hideous" code from Sema::LazilyCreateBuiltin
4619 // to insert Decl at TU scope, sorry.
4620 DeclContext *SavedContext = CurContext;
4621 CurContext = Context.getTranslationUnitDecl();
4622 PushOnScopeChains(NewD, S);
4623 CurContext = SavedContext;
4624 } else { // just add weak to existing
4625 ND->addAttr(::new (Context) WeakAttr(W.getLocation(), Context));
4629 /// ProcessDeclAttributes - Given a declarator (PD) with attributes indicated in
4630 /// it, apply them to D. This is a bit tricky because PD can have attributes
4631 /// specified in many different places, and we need to find and apply them all.
4632 void Sema::ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD,
4633 bool NonInheritable, bool Inheritable) {
4634 // It's valid to "forward-declare" #pragma weak, in which case we
4637 LoadExternalWeakUndeclaredIdentifiers();
4638 if (!WeakUndeclaredIdentifiers.empty()) {
4639 if (NamedDecl *ND = dyn_cast<NamedDecl>(D)) {
4640 if (IdentifierInfo *Id = ND->getIdentifier()) {
4641 llvm::DenseMap<IdentifierInfo*,WeakInfo>::iterator I
4642 = WeakUndeclaredIdentifiers.find(Id);
4643 if (I != WeakUndeclaredIdentifiers.end() && ND->hasLinkage()) {
4644 WeakInfo W = I->second;
4645 DeclApplyPragmaWeak(S, ND, W);
4646 WeakUndeclaredIdentifiers[Id] = W;
4653 // Apply decl attributes from the DeclSpec if present.
4654 if (const AttributeList *Attrs = PD.getDeclSpec().getAttributes().getList())
4655 ProcessDeclAttributeList(S, D, Attrs, NonInheritable, Inheritable);
4657 // Walk the declarator structure, applying decl attributes that were in a type
4658 // position to the decl itself. This handles cases like:
4659 // int *__attr__(x)** D;
4660 // when X is a decl attribute.
4661 for (unsigned i = 0, e = PD.getNumTypeObjects(); i != e; ++i)
4662 if (const AttributeList *Attrs = PD.getTypeObject(i).getAttrs())
4663 ProcessDeclAttributeList(S, D, Attrs, NonInheritable, Inheritable);
4665 // Finally, apply any attributes on the decl itself.
4666 if (const AttributeList *Attrs = PD.getAttributes())
4667 ProcessDeclAttributeList(S, D, Attrs, NonInheritable, Inheritable);
4670 /// Is the given declaration allowed to use a forbidden type?
4671 static bool isForbiddenTypeAllowed(Sema &S, Decl *decl) {
4672 // Private ivars are always okay. Unfortunately, people don't
4673 // always properly make their ivars private, even in system headers.
4674 // Plus we need to make fields okay, too.
4675 // Function declarations in sys headers will be marked unavailable.
4676 if (!isa<FieldDecl>(decl) && !isa<ObjCPropertyDecl>(decl) &&
4677 !isa<FunctionDecl>(decl))
4680 // Require it to be declared in a system header.
4681 return S.Context.getSourceManager().isInSystemHeader(decl->getLocation());
4684 /// Handle a delayed forbidden-type diagnostic.
4685 static void handleDelayedForbiddenType(Sema &S, DelayedDiagnostic &diag,
4687 if (decl && isForbiddenTypeAllowed(S, decl)) {
4688 decl->addAttr(new (S.Context) UnavailableAttr(diag.Loc, S.Context,
4689 "this system declaration uses an unsupported type"));
4692 if (S.getLangOpts().ObjCAutoRefCount)
4693 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(decl)) {
4694 // FIXME: we may want to suppress diagnostics for all
4695 // kind of forbidden type messages on unavailable functions.
4696 if (FD->hasAttr<UnavailableAttr>() &&
4697 diag.getForbiddenTypeDiagnostic() ==
4698 diag::err_arc_array_param_no_ownership) {
4699 diag.Triggered = true;
4704 S.Diag(diag.Loc, diag.getForbiddenTypeDiagnostic())
4705 << diag.getForbiddenTypeOperand() << diag.getForbiddenTypeArgument();
4706 diag.Triggered = true;
4709 void Sema::PopParsingDeclaration(ParsingDeclState state, Decl *decl) {
4710 assert(DelayedDiagnostics.getCurrentPool());
4711 DelayedDiagnosticPool &poppedPool = *DelayedDiagnostics.getCurrentPool();
4712 DelayedDiagnostics.popWithoutEmitting(state);
4714 // When delaying diagnostics to run in the context of a parsed
4715 // declaration, we only want to actually emit anything if parsing
4719 // We emit all the active diagnostics in this pool or any of its
4720 // parents. In general, we'll get one pool for the decl spec
4721 // and a child pool for each declarator; in a decl group like:
4722 // deprecated_typedef foo, *bar, baz();
4723 // only the declarator pops will be passed decls. This is correct;
4724 // we really do need to consider delayed diagnostics from the decl spec
4725 // for each of the different declarations.
4726 const DelayedDiagnosticPool *pool = &poppedPool;
4728 for (DelayedDiagnosticPool::pool_iterator
4729 i = pool->pool_begin(), e = pool->pool_end(); i != e; ++i) {
4730 // This const_cast is a bit lame. Really, Triggered should be mutable.
4731 DelayedDiagnostic &diag = const_cast<DelayedDiagnostic&>(*i);
4735 switch (diag.Kind) {
4736 case DelayedDiagnostic::Deprecation:
4737 // Don't bother giving deprecation diagnostics if the decl is invalid.
4738 if (!decl->isInvalidDecl())
4739 HandleDelayedDeprecationCheck(diag, decl);
4742 case DelayedDiagnostic::Access:
4743 HandleDelayedAccessCheck(diag, decl);
4746 case DelayedDiagnostic::ForbiddenType:
4747 handleDelayedForbiddenType(*this, diag, decl);
4751 } while ((pool = pool->getParent()));
4754 /// Given a set of delayed diagnostics, re-emit them as if they had
4755 /// been delayed in the current context instead of in the given pool.
4756 /// Essentially, this just moves them to the current pool.
4757 void Sema::redelayDiagnostics(DelayedDiagnosticPool &pool) {
4758 DelayedDiagnosticPool *curPool = DelayedDiagnostics.getCurrentPool();
4759 assert(curPool && "re-emitting in undelayed context not supported");
4760 curPool->steal(pool);
4763 static bool isDeclDeprecated(Decl *D) {
4765 if (D->isDeprecated())
4767 // A category implicitly has the availability of the interface.
4768 if (const ObjCCategoryDecl *CatD = dyn_cast<ObjCCategoryDecl>(D))
4769 return CatD->getClassInterface()->isDeprecated();
4770 } while ((D = cast_or_null<Decl>(D->getDeclContext())));
4775 DoEmitDeprecationWarning(Sema &S, const NamedDecl *D, StringRef Message,
4777 const ObjCInterfaceDecl *UnknownObjCClass) {
4778 DeclarationName Name = D->getDeclName();
4779 if (!Message.empty()) {
4780 S.Diag(Loc, diag::warn_deprecated_message) << Name << Message;
4781 S.Diag(D->getLocation(),
4782 isa<ObjCMethodDecl>(D) ? diag::note_method_declared_at
4783 : diag::note_previous_decl) << Name;
4784 } else if (!UnknownObjCClass) {
4785 S.Diag(Loc, diag::warn_deprecated) << D->getDeclName();
4786 S.Diag(D->getLocation(),
4787 isa<ObjCMethodDecl>(D) ? diag::note_method_declared_at
4788 : diag::note_previous_decl) << Name;
4790 S.Diag(Loc, diag::warn_deprecated_fwdclass_message) << Name;
4791 S.Diag(UnknownObjCClass->getLocation(), diag::note_forward_class);
4795 void Sema::HandleDelayedDeprecationCheck(DelayedDiagnostic &DD,
4797 if (isDeclDeprecated(Ctx))
4800 DD.Triggered = true;
4801 DoEmitDeprecationWarning(*this, DD.getDeprecationDecl(),
4802 DD.getDeprecationMessage(), DD.Loc,
4803 DD.getUnknownObjCClass());
4806 void Sema::EmitDeprecationWarning(NamedDecl *D, StringRef Message,
4808 const ObjCInterfaceDecl *UnknownObjCClass) {
4809 // Delay if we're currently parsing a declaration.
4810 if (DelayedDiagnostics.shouldDelayDiagnostics()) {
4811 DelayedDiagnostics.add(DelayedDiagnostic::makeDeprecation(Loc, D,
4817 // Otherwise, don't warn if our current context is deprecated.
4818 if (isDeclDeprecated(cast<Decl>(getCurLexicalContext())))
4820 DoEmitDeprecationWarning(*this, D, Message, Loc, UnknownObjCClass);