Index: include/clang/AST/Attr.h =================================================================== --- include/clang/AST/Attr.h +++ include/clang/AST/Attr.h @@ -195,6 +195,128 @@ } }; +/// A single parameter index whose accessors require each use to make explicit +/// the parameter index encoding needed. +class ParamIdx { + // Idx is exposed only via accessors that specify specific encodings. + unsigned Idx : 30; + unsigned HasThis : 1; + unsigned IsValid : 1; + + void assertComparable(const ParamIdx &I) const { + assert(isValid() && I.isValid() && + "ParamIdx must be valid to be compared"); + // It's possible to compare indices from separate functions, but so far + // it's not proven useful. Moreover, it might be confusing because a + // comparison on the results of getASTIndex might be inconsistent with a + // comparison on the ParamIdx objects themselves. + assert(HasThis == I.HasThis && + "ParamIdx must be for the same function to be compared"); + } + +public: + /// Construct an invalid parameter index (\c isValid returns false and + /// accessors fail an assert). + ParamIdx() : Idx(0), HasThis(false), IsValid(false) {} + + /// \param Idx is the parameter index as it is normally specified in + /// attributes in the source: one-origin including any C++ implicit this + /// parameter. + /// + /// \param D is the declaration containing the parameters. It is used to + /// determine if there is a C++ implicit this parameter. + ParamIdx(unsigned Idx, const Decl *D) + : Idx(Idx), HasThis(false), IsValid(true) { + assert(Idx >= 1 && "Idx must be one-origin"); + if (const auto *FD = dyn_cast(D)) + HasThis = FD->isCXXInstanceMember(); + } + + /// A type into which \c ParamIdx can be serialized. + /// + /// A static assertion that it's of the correct size follows the \c ParamIdx + /// class definition. + typedef uint32_t SerialType; + + /// Produce a representation that can later be passed to \c deserialize to + /// construct an equivalent \c ParamIdx. + SerialType serialize() const { + return *reinterpret_cast(this); + } + + /// Construct from a result from \c serialize. + static ParamIdx deserialize(SerialType S) { + ParamIdx P(*reinterpret_cast(&S)); + assert((!P.IsValid || P.Idx >= 1) && "valid Idx must be one-origin"); + return P; + } + + /// Is this parameter index valid? + bool isValid() const { return IsValid; } + + /// Get the parameter index as it would normally be encoded for attributes at + /// the source level of representation: one-origin including any C++ implicit + /// this parameter. + /// + /// This encoding thus makes sense for diagnostics, pretty printing, and + /// constructing new attributes from a source-like specification. + unsigned getSourceIndex() const { + assert(isValid() && "ParamIdx must be valid"); + return Idx; + } + + /// Get the parameter index as it would normally be encoded at the AST level + /// of representation: zero-origin not including any C++ implicit this + /// parameter. + /// + /// This is the encoding primarily used in Sema. However, in diagnostics, + /// Sema uses \c getSourceIndex instead. + unsigned getASTIndex() const { + assert(isValid() && "ParamIdx must be valid"); + assert(Idx >= 1 + HasThis && + "stored index must be base-1 and not specify C++ implicit this"); + return Idx - 1 - HasThis; + } + + /// Get the parameter index as it would normally be encoded at the LLVM level + /// of representation: zero-origin including any C++ implicit this parameter. + /// + /// This is the encoding primarily used in CodeGen. + unsigned getLLVMIndex() const { + assert(isValid() && "ParamIdx must be valid"); + assert(Idx >= 1 && "stored index must be base-1"); + return Idx - 1; + } + + bool operator==(const ParamIdx &I) const { + assertComparable(I); + return Idx == I.Idx; + } + bool operator!=(const ParamIdx &I) const { + assertComparable(I); + return Idx != I.Idx; + } + bool operator<(const ParamIdx &I) const { + assertComparable(I); + return Idx < I.Idx; + } + bool operator>(const ParamIdx &I) const { + assertComparable(I); + return Idx > I.Idx; + } + bool operator<=(const ParamIdx &I) const { + assertComparable(I); + return Idx <= I.Idx; + } + bool operator>=(const ParamIdx &I) const { + assertComparable(I); + return Idx >= I.Idx; + } +}; + +static_assert(sizeof(ParamIdx) == sizeof(ParamIdx::SerialType), + "ParamIdx does not fit its serialization type"); + #include "clang/AST/Attrs.inc" inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, Index: include/clang/Basic/Attr.td =================================================================== --- include/clang/Basic/Attr.td +++ include/clang/Basic/Attr.td @@ -169,6 +169,12 @@ class VariadicExprArgument : Argument; class VariadicStringArgument : Argument; +// Like VariadicUnsignedArgument except values are ParamIdx. +class VariadicParamIdxArgument : Argument; + +// Like VariadicParamIdxArgument but for a single function parameter index. +class ParamIdxArgument : Argument; + // A version of the form major.minor[.subminor]. class VersionArgument : Argument; @@ -614,6 +620,12 @@ def XRayLogArgs : InheritableAttr { let Spellings = [Clang<"xray_log_args">]; let Subjects = SubjectList<[Function, ObjCMethod]>; + // This argument is a count not an index, so it has the same encoding (base + // 1 including C++ implicit this parameter) at the source and LLVM levels of + // representation, so ParamIdxArgument is inappropriate. It is never used + // at the AST level of representation, so it never needs to be adjusted not + // to include any C++ implicit this parameter. Thus, we just store it and + // use it as an unsigned that never needs adjustment. let Args = [UnsignedArgument<"ArgumentCount">]; let Documentation = [XRayDocs]; } @@ -1021,7 +1033,8 @@ def AllocSize : InheritableAttr { let Spellings = [GCC<"alloc_size">]; let Subjects = SubjectList<[Function]>; - let Args = [IntArgument<"ElemSizeParam">, IntArgument<"NumElemsParam", 1>]; + let Args = [ParamIdxArgument<"ElemSizeParam">, + ParamIdxArgument<"NumElemsParam", /*opt*/ 1>]; let TemplateDependent = 1; let Documentation = [AllocSizeDocs]; } @@ -1108,7 +1121,7 @@ def FormatArg : InheritableAttr { let Spellings = [GCC<"format_arg">]; - let Args = [IntArgument<"FormatIdx">]; + let Args = [ParamIdxArgument<"FormatIdx">]; let Subjects = SubjectList<[ObjCMethod, HasFunctionProto]>; let Documentation = [Undocumented]; } @@ -1388,16 +1401,16 @@ let Spellings = [GCC<"nonnull">]; let Subjects = SubjectList<[ObjCMethod, HasFunctionProto, ParmVar], WarnDiag, "functions, methods, and parameters">; - let Args = [VariadicUnsignedArgument<"Args">]; - let AdditionalMembers = -[{bool isNonNull(unsigned idx) const { - if (!args_size()) - return true; - for (const auto &V : args()) - if (V == idx) + let Args = [VariadicParamIdxArgument<"Args">]; + let AdditionalMembers = [{ + bool isNonNull(unsigned IdxAST) const { + if (!args_size()) return true; - return false; - } }]; + return args_end() != std::find_if( + args_begin(), args_end(), + [=](const ParamIdx &Idx) { return Idx.getASTIndex() == IdxAST; }); + } + }]; // FIXME: We should merge duplicates into a single nonnull attribute. let InheritEvenIfAlreadyPresent = 1; let Documentation = [NonNullDocs]; @@ -1455,7 +1468,7 @@ def AllocAlign : InheritableAttr { let Spellings = [GCC<"alloc_align">]; let Subjects = SubjectList<[HasFunctionProto]>; - let Args = [IntArgument<"ParamIndex">]; + let Args = [ParamIdxArgument<"ParamIndex">]; let Documentation = [AllocAlignDocs]; } @@ -1664,7 +1677,8 @@ Returns; } }]; - let Args = [IdentifierArgument<"Module">, VariadicUnsignedArgument<"Args">]; + let Args = [IdentifierArgument<"Module">, + VariadicParamIdxArgument<"Args">]; let Subjects = SubjectList<[HasFunctionProto]>; let Documentation = [Undocumented]; } @@ -2490,8 +2504,8 @@ Clang<"pointer_with_type_tag">]; let Subjects = SubjectList<[HasFunctionProto], ErrorDiag>; let Args = [IdentifierArgument<"ArgumentKind">, - UnsignedArgument<"ArgumentIdx">, - UnsignedArgument<"TypeTagIdx">, + ParamIdxArgument<"ArgumentIdx">, + ParamIdxArgument<"TypeTagIdx">, BoolArgument<"IsPointer", /*opt*/0, /*fake*/1>]; let Documentation = [ArgumentWithTypeTagDocs, PointerWithTypeTagDocs]; } Index: lib/AST/ExprConstant.cpp =================================================================== --- lib/AST/ExprConstant.cpp +++ lib/AST/ExprConstant.cpp @@ -5475,9 +5475,8 @@ llvm::APInt &Result) { const AllocSizeAttr *AllocSize = getAllocSizeAttr(Call); - // alloc_size args are 1-indexed, 0 means not present. - assert(AllocSize && AllocSize->getElemSizeParam() != 0); - unsigned SizeArgNo = AllocSize->getElemSizeParam() - 1; + assert(AllocSize && AllocSize->getElemSizeParam().isValid()); + unsigned SizeArgNo = AllocSize->getElemSizeParam().getASTIndex(); unsigned BitsInSizeT = Ctx.getTypeSize(Ctx.getSizeType()); if (Call->getNumArgs() <= SizeArgNo) return false; @@ -5495,14 +5494,13 @@ if (!EvaluateAsSizeT(Call->getArg(SizeArgNo), SizeOfElem)) return false; - if (!AllocSize->getNumElemsParam()) { + if (!AllocSize->getNumElemsParam().isValid()) { Result = std::move(SizeOfElem); return true; } APSInt NumberOfElems; - // Argument numbers start at 1 - unsigned NumArgNo = AllocSize->getNumElemsParam() - 1; + unsigned NumArgNo = AllocSize->getNumElemsParam().getASTIndex(); if (!EvaluateAsSizeT(Call->getArg(NumArgNo), NumberOfElems)) return false; Index: lib/CodeGen/CGCall.cpp =================================================================== --- lib/CodeGen/CGCall.cpp +++ lib/CodeGen/CGCall.cpp @@ -1847,10 +1847,9 @@ HasOptnone = TargetDecl->hasAttr(); if (auto *AllocSize = TargetDecl->getAttr()) { Optional NumElemsParam; - // alloc_size args are base-1, 0 means not present. - if (unsigned N = AllocSize->getNumElemsParam()) - NumElemsParam = N - 1; - FuncAttrs.addAllocSizeAttr(AllocSize->getElemSizeParam() - 1, + if (AllocSize->getNumElemsParam().isValid()) + NumElemsParam = AllocSize->getNumElemsParam().getLLVMIndex(); + FuncAttrs.addAllocSizeAttr(AllocSize->getElemSizeParam().getLLVMIndex(), NumElemsParam); } } @@ -4399,7 +4398,7 @@ OffsetValue); } else if (const auto *AA = TargetDecl->getAttr()) { llvm::Value *ParamVal = - CallArgs[AA->getParamIndex() - 1].RV.getScalarVal(); + CallArgs[AA->getParamIndex().getLLVMIndex()].RV.getScalarVal(); EmitAlignmentAssumption(Ret.getScalarVal(), ParamVal); } } Index: lib/Sema/SemaChecking.cpp =================================================================== --- lib/Sema/SemaChecking.cpp +++ lib/Sema/SemaChecking.cpp @@ -2619,12 +2619,13 @@ return; } - for (unsigned Val : NonNull->args()) { - if (Val >= Args.size()) + for (const ParamIdx &Idx : NonNull->args()) { + unsigned IdxAST = Idx.getASTIndex(); + if (IdxAST >= Args.size()) continue; if (NonNullArgs.empty()) NonNullArgs.resize(Args.size()); - NonNullArgs.set(Val); + NonNullArgs.set(IdxAST); } } } @@ -5002,12 +5003,7 @@ const CallExpr *CE = cast(E); if (const NamedDecl *ND = dyn_cast_or_null(CE->getCalleeDecl())) { if (const FormatArgAttr *FA = ND->getAttr()) { - unsigned ArgIndex = FA->getFormatIdx(); - if (const CXXMethodDecl *MD = dyn_cast(ND)) - if (MD->isInstance()) - --ArgIndex; - const Expr *Arg = CE->getArg(ArgIndex - 1); - + const Expr *Arg = CE->getArg(FA->getFormatIdx().getASTIndex()); return checkFormatStringExpr(S, Arg, Args, HasVAListArg, format_idx, firstDataArg, Type, CallType, InFunctionCall, @@ -5032,8 +5028,7 @@ const auto *ME = cast(E); if (const auto *ND = ME->getMethodDecl()) { if (const auto *FA = ND->getAttr()) { - unsigned ArgIndex = FA->getFormatIdx(); - const Expr *Arg = ME->getArg(ArgIndex - 1); + const Expr *Arg = ME->getArg(FA->getFormatIdx().getASTIndex()); return checkFormatStringExpr( S, Arg, Args, HasVAListArg, format_idx, firstDataArg, Type, CallType, InFunctionCall, CheckedVarArgs, UncoveredArg, Offset); @@ -10086,8 +10081,8 @@ return; } - for (unsigned ArgNo : NonNull->args()) { - if (ArgNo == ParamNo) { + for (const ParamIdx &ArgNo : NonNull->args()) { + if (ArgNo.getASTIndex() == ParamNo) { ComplainAboutNonnullParamOrCall(NonNull); return; } @@ -12242,13 +12237,13 @@ bool IsPointerAttr = Attr->getIsPointer(); // Retrieve the argument representing the 'type_tag'. - if (Attr->getTypeTagIdx() >= ExprArgs.size()) { - // Add 1 to display the user's specified value. + unsigned TypeTagIdxAST = Attr->getTypeTagIdx().getASTIndex(); + if (TypeTagIdxAST >= ExprArgs.size()) { Diag(CallSiteLoc, diag::err_tag_index_out_of_range) - << 0 << Attr->getTypeTagIdx() + 1; + << 0 << Attr->getTypeTagIdx().getSourceIndex(); return; } - const Expr *TypeTagExpr = ExprArgs[Attr->getTypeTagIdx()]; + const Expr *TypeTagExpr = ExprArgs[TypeTagIdxAST]; bool FoundWrongKind; TypeTagData TypeInfo; if (!GetMatchingCType(ArgumentKind, TypeTagExpr, Context, @@ -12262,13 +12257,13 @@ } // Retrieve the argument representing the 'arg_idx'. - if (Attr->getArgumentIdx() >= ExprArgs.size()) { - // Add 1 to display the user's specified value. + unsigned ArgumentIdxAST = Attr->getArgumentIdx().getASTIndex(); + if (ArgumentIdxAST >= ExprArgs.size()) { Diag(CallSiteLoc, diag::err_tag_index_out_of_range) - << 1 << Attr->getArgumentIdx() + 1; + << 1 << Attr->getArgumentIdx().getSourceIndex(); return; } - const Expr *ArgumentExpr = ExprArgs[Attr->getArgumentIdx()]; + const Expr *ArgumentExpr = ExprArgs[ArgumentIdxAST]; if (IsPointerAttr) { // Skip implicit cast of pointer to `void *' (as a function argument). if (const ImplicitCastExpr *ICE = dyn_cast(ArgumentExpr)) Index: lib/Sema/SemaDecl.cpp =================================================================== --- lib/Sema/SemaDecl.cpp +++ lib/Sema/SemaDecl.cpp @@ -13185,7 +13185,7 @@ // We already have a __builtin___CFStringMakeConstantString, // but builds that use -fno-constant-cfstrings don't go through that. if (!FD->hasAttr()) - FD->addAttr(FormatArgAttr::CreateImplicit(Context, 1, + FD->addAttr(FormatArgAttr::CreateImplicit(Context, ParamIdx(1, FD), FD->getLocation())); } } Index: lib/Sema/SemaDeclAttr.cpp =================================================================== --- lib/Sema/SemaDeclAttr.cpp +++ lib/Sema/SemaDeclAttr.cpp @@ -312,7 +312,7 @@ template static bool checkFunctionOrMethodParameterIndex( Sema &S, const Decl *D, const AttrInfo &AI, unsigned AttrArgNum, - const Expr *IdxExpr, uint64_t &Idx, bool AllowImplicitThis = false) { + const Expr *IdxExpr, ParamIdx &Idx, bool CanIndexImplicitThis = false) { assert(isFunctionOrMethodOrBlock(D)); // In C++ the implicit 'this' function parameter also counts. @@ -332,23 +332,22 @@ return false; } - Idx = IdxInt.getLimitedValue(); - if (Idx < 1 || (!IV && Idx > NumParams)) { + unsigned IdxSource = IdxInt.getLimitedValue(UINT_MAX); + if (IdxSource < 1 || (!IV && IdxSource > NumParams)) { S.Diag(getAttrLoc(AI), diag::err_attribute_argument_out_of_bounds) - << getAttrName(AI) << AttrArgNum << IdxExpr->getSourceRange(); + << getAttrName(AI) << AttrArgNum << IdxExpr->getSourceRange(); return false; } - Idx--; // Convert to zero-based. - if (HasImplicitThisParam && !AllowImplicitThis) { - if (Idx == 0) { + if (HasImplicitThisParam && !CanIndexImplicitThis) { + if (IdxSource == 1) { S.Diag(getAttrLoc(AI), diag::err_attribute_invalid_implicit_this_argument) - << getAttrName(AI) << IdxExpr->getSourceRange(); + << getAttrName(AI) << IdxExpr->getSourceRange(); return false; } - --Idx; } + Idx = ParamIdx(IdxSource, D); return true; } @@ -773,18 +772,15 @@ /// AttrArgNo is used to actually retrieve the argument, so it's base-0. template static bool checkParamIsIntegerType(Sema &S, const FunctionDecl *FD, - const AttrInfo &AI, unsigned AttrArgNo, - bool AllowDependentType = false) { + const AttrInfo &AI, unsigned AttrArgNo) { assert(AI.isArgExpr(AttrArgNo) && "Expected expression argument"); Expr *AttrArg = AI.getArgAsExpr(AttrArgNo); - uint64_t Idx; + ParamIdx Idx; if (!checkFunctionOrMethodParameterIndex(S, FD, AI, AttrArgNo + 1, AttrArg, Idx)) return false; - const ParmVarDecl *Param = FD->getParamDecl(Idx); - if (AllowDependentType && Param->getType()->isDependentType()) - return true; + const ParmVarDecl *Param = FD->getParamDecl(Idx.getASTIndex()); if (!Param->getType()->isIntegerType() && !Param->getType()->isCharType()) { SourceLocation SrcLoc = AttrArg->getLocStart(); S.Diag(SrcLoc, diag::err_attribute_integers_only) @@ -807,25 +803,24 @@ } const Expr *SizeExpr = AL.getArgAsExpr(0); - int SizeArgNo; + int SizeArgNoVal; // Parameter indices are 1-indexed, hence Index=1 - if (!checkPositiveIntArgument(S, AL, SizeExpr, SizeArgNo, /*Index=*/1)) + if (!checkPositiveIntArgument(S, AL, SizeExpr, SizeArgNoVal, /*Index=*/1)) return; - if (!checkParamIsIntegerType(S, FD, AL, /*AttrArgNo=*/0)) return; + ParamIdx SizeArgNo(SizeArgNoVal, D); - // Args are 1-indexed, so 0 implies that the arg was not present - int NumberArgNo = 0; + ParamIdx NumberArgNo; if (AL.getNumArgs() == 2) { const Expr *NumberExpr = AL.getArgAsExpr(1); + int Val; // Parameter indices are 1-based, hence Index=2 - if (!checkPositiveIntArgument(S, AL, NumberExpr, NumberArgNo, - /*Index=*/2)) + if (!checkPositiveIntArgument(S, AL, NumberExpr, Val, /*Index=*/2)) return; - if (!checkParamIsIntegerType(S, FD, AL, /*AttrArgNo=*/1)) return; + NumberArgNo = ParamIdx(Val, D); } D->addAttr(::new (S.Context) @@ -1425,18 +1420,19 @@ } static void handleNonNullAttr(Sema &S, Decl *D, const AttributeList &AL) { - SmallVector NonNullArgs; + SmallVector NonNullArgs; for (unsigned I = 0; I < AL.getNumArgs(); ++I) { Expr *Ex = AL.getArgAsExpr(I); - uint64_t Idx; + ParamIdx Idx; if (!checkFunctionOrMethodParameterIndex(S, D, AL, I + 1, Ex, Idx)) return; // Is the function argument a pointer type? - if (Idx < getFunctionOrMethodNumParams(D) && - !attrNonNullArgCheck(S, getFunctionOrMethodParamType(D, Idx), AL, - Ex->getSourceRange(), - getFunctionOrMethodParamRange(D, Idx))) + if (Idx.getASTIndex() < getFunctionOrMethodNumParams(D) && + !attrNonNullArgCheck( + S, getFunctionOrMethodParamType(D, Idx.getASTIndex()), AL, + Ex->getSourceRange(), + getFunctionOrMethodParamRange(D, Idx.getASTIndex()))) continue; NonNullArgs.push_back(Idx); @@ -1460,12 +1456,12 @@ S.Diag(AL.getLoc(), diag::warn_attribute_nonnull_no_pointers); } - unsigned *Start = NonNullArgs.data(); + ParamIdx *Start = NonNullArgs.data(); unsigned Size = NonNullArgs.size(); llvm::array_pod_sort(Start, Start + Size); D->addAttr(::new (S.Context) - NonNullAttr(AL.getRange(), S.Context, Start, Size, - AL.getAttributeSpellingListIndex())); + NonNullAttr(AL.getRange(), S.Context, Start, Size, + AL.getAttributeSpellingListIndex())); } static void handleNonNullAttrParameter(Sema &S, ParmVarDecl *D, @@ -1486,8 +1482,8 @@ return; D->addAttr(::new (S.Context) - NonNullAttr(AL.getRange(), S.Context, nullptr, 0, - AL.getAttributeSpellingListIndex())); + NonNullAttr(AL.getRange(), S.Context, nullptr, 0, + AL.getAttributeSpellingListIndex())); } static void handleReturnsNonNullAttr(Sema &S, Decl *D, @@ -1588,7 +1584,7 @@ unsigned SpellingListIndex) { QualType ResultType = getFunctionOrMethodResultType(D); - AllocAlignAttr TmpAttr(AttrRange, Context, 0, SpellingListIndex); + AllocAlignAttr TmpAttr(AttrRange, Context, ParamIdx(), SpellingListIndex); SourceLocation AttrLoc = AttrRange.getBegin(); if (!ResultType->isDependentType() && @@ -1598,28 +1594,22 @@ return; } - uint64_t IndexVal; + ParamIdx Idx; const auto *FuncDecl = cast(D); if (!checkFunctionOrMethodParameterIndex(*this, FuncDecl, TmpAttr, - /*AttrArgNo=*/1, ParamExpr, - IndexVal)) + /*AttrArgNo=*/1, ParamExpr, Idx)) return; - QualType Ty = getFunctionOrMethodParamType(D, IndexVal); + QualType Ty = getFunctionOrMethodParamType(D, Idx.getASTIndex()); if (!Ty->isDependentType() && !Ty->isIntegralType(Context)) { Diag(ParamExpr->getLocStart(), diag::err_attribute_integers_only) - << &TmpAttr << FuncDecl->getParamDecl(IndexVal)->getSourceRange(); + << &TmpAttr + << FuncDecl->getParamDecl(Idx.getASTIndex())->getSourceRange(); return; } - // We cannot use the Idx returned from checkFunctionOrMethodParameterIndex - // because that has corrected for the implicit this parameter, and is zero- - // based. The attribute expects what the user wrote explicitly. - llvm::APSInt Val; - ParamExpr->EvaluateAsInt(Val, Context); - - D->addAttr(::new (Context) AllocAlignAttr( - AttrRange, Context, Val.getZExtValue(), SpellingListIndex)); + D->addAttr(::new (Context) + AllocAlignAttr(AttrRange, Context, Idx, SpellingListIndex)); } /// Normalize the attribute, __foo__ becomes foo. @@ -1679,15 +1669,15 @@ Module = &S.PP.getIdentifierTable().get(ModuleName); } - SmallVector OwnershipArgs; + SmallVector OwnershipArgs; for (unsigned i = 1; i < AL.getNumArgs(); ++i) { Expr *Ex = AL.getArgAsExpr(i); - uint64_t Idx; + ParamIdx Idx; if (!checkFunctionOrMethodParameterIndex(S, D, AL, i, Ex, Idx)) return; // Is the function argument a pointer type? - QualType T = getFunctionOrMethodParamType(D, Idx); + QualType T = getFunctionOrMethodParamType(D, Idx.getASTIndex()); int Err = -1; // No error switch (K) { case OwnershipAttr::Takes: @@ -1718,14 +1708,13 @@ } else if (K == OwnershipAttr::Returns && I->getOwnKind() == OwnershipAttr::Returns) { // A returns attribute conflicts with any other returns attribute using - // a different index. Note, diagnostic reporting is 1-based, but stored - // argument indexes are 0-based. + // a different index. if (std::find(I->args_begin(), I->args_end(), Idx) == I->args_end()) { S.Diag(I->getLocation(), diag::err_ownership_returns_index_mismatch) - << *(I->args_begin()) + 1; + << I->args_begin()->getSourceIndex(); if (I->args_size()) S.Diag(AL.getLoc(), diag::note_ownership_returns_index_mismatch) - << (unsigned)Idx + 1 << Ex->getSourceRange(); + << Idx.getSourceIndex() << Ex->getSourceRange(); return; } } @@ -1733,13 +1722,12 @@ OwnershipArgs.push_back(Idx); } - unsigned* start = OwnershipArgs.data(); - unsigned size = OwnershipArgs.size(); - llvm::array_pod_sort(start, start + size); - + ParamIdx *Start = OwnershipArgs.data(); + unsigned Size = OwnershipArgs.size(); + llvm::array_pod_sort(Start, Start + Size); D->addAttr(::new (S.Context) - OwnershipAttr(AL.getLoc(), S.Context, Module, start, size, - AL.getAttributeSpellingListIndex())); + OwnershipAttr(AL.getLoc(), S.Context, Module, Start, Size, + AL.getAttributeSpellingListIndex())); } static void handleWeakRefAttr(Sema &S, Decl *D, const AttributeList &AL) { @@ -3057,12 +3045,12 @@ /// http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html static void handleFormatArgAttr(Sema &S, Decl *D, const AttributeList &AL) { Expr *IdxExpr = AL.getArgAsExpr(0); - uint64_t Idx; + ParamIdx Idx; if (!checkFunctionOrMethodParameterIndex(S, D, AL, 1, IdxExpr, Idx)) return; // Make sure the format string is really a string. - QualType Ty = getFunctionOrMethodParamType(D, Idx); + QualType Ty = getFunctionOrMethodParamType(D, Idx.getASTIndex()); bool NotNSStringTy = !isNSStringType(Ty, S.Context); if (NotNSStringTy && @@ -3085,15 +3073,8 @@ return; } - // We cannot use the Idx returned from checkFunctionOrMethodParameterIndex - // because that has corrected for the implicit this parameter, and is zero- - // based. The attribute expects what the user wrote explicitly. - llvm::APSInt Val; - IdxExpr->EvaluateAsInt(Val, S.Context); - - D->addAttr(::new (S.Context) - FormatArgAttr(AL.getRange(), S.Context, Val.getZExtValue(), - AL.getAttributeSpellingListIndex())); + D->addAttr(::new (S.Context) FormatArgAttr( + AL.getRange(), S.Context, Idx, AL.getAttributeSpellingListIndex())); } enum FormatAttrKind { @@ -4487,13 +4468,13 @@ << AL.getName() << /* arg num = */ 1 << AANT_ArgumentIdentifier; return; } - - uint64_t ArgumentIdx; + + ParamIdx ArgumentIdx; if (!checkFunctionOrMethodParameterIndex(S, D, AL, 2, AL.getArgAsExpr(1), ArgumentIdx)) return; - uint64_t TypeTagIdx; + ParamIdx TypeTagIdx; if (!checkFunctionOrMethodParameterIndex(S, D, AL, 3, AL.getArgAsExpr(2), TypeTagIdx)) return; @@ -4501,8 +4482,9 @@ bool IsPointer = AL.getName()->getName() == "pointer_with_type_tag"; if (IsPointer) { // Ensure that buffer has a pointer type. - if (ArgumentIdx >= getFunctionOrMethodNumParams(D) || - !getFunctionOrMethodParamType(D, ArgumentIdx)->isPointerType()) + unsigned ArgumentIdxAST = ArgumentIdx.getASTIndex(); + if (ArgumentIdxAST >= getFunctionOrMethodNumParams(D) || + !getFunctionOrMethodParamType(D, ArgumentIdxAST)->isPointerType()) S.Diag(AL.getLoc(), diag::err_attribute_pointers_only) << AL.getName() << 0; } @@ -4542,19 +4524,18 @@ AL.getAttributeSpellingListIndex())); } -static void handleXRayLogArgsAttr(Sema &S, Decl *D, - const AttributeList &AL) { - uint64_t ArgCount; +static void handleXRayLogArgsAttr(Sema &S, Decl *D, const AttributeList &AL) { + ParamIdx ArgCount; if (!checkFunctionOrMethodParameterIndex(S, D, AL, 1, AL.getArgAsExpr(0), ArgCount, - true /* AllowImplicitThis*/)) + true /* CanIndexImplicitThis */)) return; - // ArgCount isn't a parameter index [0;n), it's a count [1;n] - hence + 1. - D->addAttr(::new (S.Context) - XRayLogArgsAttr(AL.getRange(), S.Context, ++ArgCount, - AL.getAttributeSpellingListIndex())); + // ArgCount isn't a parameter index [0;n), it's a count [1;n] + D->addAttr(::new (S.Context) XRayLogArgsAttr( + AL.getRange(), S.Context, ArgCount.getSourceIndex(), + AL.getAttributeSpellingListIndex())); } //===----------------------------------------------------------------------===// Index: lib/Sema/SemaTemplateInstantiateDecl.cpp =================================================================== --- lib/Sema/SemaTemplateInstantiateDecl.cpp +++ lib/Sema/SemaTemplateInstantiateDecl.cpp @@ -176,7 +176,8 @@ Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, const AllocAlignAttr *Align, Decl *New) { Expr *Param = IntegerLiteral::Create( - S.getASTContext(), llvm::APInt(64, Align->getParamIndex()), + S.getASTContext(), + llvm::APInt(64, Align->getParamIndex().getSourceIndex()), S.getASTContext().UnsignedLongLongTy, Align->getLocation()); S.AddAllocAlignAttr(Align->getLocation(), New, Param, Align->getSpellingListIndex()); Index: lib/StaticAnalyzer/Checkers/MallocChecker.cpp =================================================================== --- lib/StaticAnalyzer/Checkers/MallocChecker.cpp +++ lib/StaticAnalyzer/Checkers/MallocChecker.cpp @@ -1231,9 +1231,10 @@ if (Att->getModule() != II_malloc) return nullptr; - OwnershipAttr::args_iterator I = Att->args_begin(), E = Att->args_end(); + ParamIdx *I = Att->args_begin(), *E = Att->args_end(); if (I != E) { - return MallocMemAux(C, CE, CE->getArg(*I), UndefinedVal(), State); + return MallocMemAux(C, CE, CE->getArg(I->getASTIndex()), UndefinedVal(), + State); } return MallocMemAux(C, CE, UnknownVal(), UndefinedVal(), State); } @@ -1331,9 +1332,9 @@ bool ReleasedAllocated = false; for (const auto &Arg : Att->args()) { - ProgramStateRef StateI = FreeMemAux(C, CE, State, Arg, - Att->getOwnKind() == OwnershipAttr::Holds, - ReleasedAllocated); + ProgramStateRef StateI = FreeMemAux( + C, CE, State, Arg.getASTIndex(), + Att->getOwnKind() == OwnershipAttr::Holds, ReleasedAllocated); if (StateI) State = StateI; } Index: lib/StaticAnalyzer/Checkers/NonNullParamChecker.cpp =================================================================== --- lib/StaticAnalyzer/Checkers/NonNullParamChecker.cpp +++ lib/StaticAnalyzer/Checkers/NonNullParamChecker.cpp @@ -54,10 +54,11 @@ AttrNonNull.set(0, NumArgs); break; } - for (unsigned Val : NonNull->args()) { - if (Val >= NumArgs) + for (const ParamIdx &Idx : NonNull->args()) { + unsigned IdxAST = Idx.getASTIndex(); + if (IdxAST >= NumArgs) continue; - AttrNonNull.set(Val); + AttrNonNull.set(IdxAST); } } return AttrNonNull; Index: test/CodeGenCXX/alloc-size.cpp =================================================================== --- test/CodeGenCXX/alloc-size.cpp +++ test/CodeGenCXX/alloc-size.cpp @@ -86,3 +86,21 @@ return __builtin_object_size(p, 0); } } // namespace alloc_size_with_cleanups + +class C { +public: + void *my_malloc(int N) __attribute__((alloc_size(2))); + void *my_calloc(int N, int M) __attribute__((alloc_size(2, 3))); +}; + +// CHECK-LABEL: define i32 @_Z16callMemberMallocv +int callMemberMalloc() { + // CHECK: ret i32 16 + return __builtin_object_size(C().my_malloc(16), 0); +} + +// CHECK-LABEL: define i32 @_Z16callMemberCallocv +int callMemberCalloc() { + // CHECK: ret i32 32 + return __builtin_object_size(C().my_calloc(16, 2), 0); +} Index: test/Frontend/ast-attr.cpp =================================================================== --- test/Frontend/ast-attr.cpp +++ test/Frontend/ast-attr.cpp @@ -0,0 +1,5 @@ +// RUN: %clang -emit-ast -o %t.ast %S/../Sema/attr-print.cpp +// RUN: %clang_cc1 %t.ast -ast-print | FileCheck %S/../Sema/attr-print.cpp + +// %S/../Sema/attr-print.cpp exercises many different attributes, so we reuse +// it here to check -emit-ast for attributes. Index: test/Misc/ast-dump-attr.cpp =================================================================== --- test/Misc/ast-dump-attr.cpp +++ test/Misc/ast-dump-attr.cpp @@ -68,12 +68,12 @@ void TestBool(void *, int) __attribute__((pointer_with_type_tag(bool1,1,2))); // CHECK: FunctionDecl{{.*}}TestBool -// CHECK: ArgumentWithTypeTagAttr{{.*}}pointer_with_type_tag bool1 0 1 IsPointer +// CHECK: ArgumentWithTypeTagAttr{{.*}}pointer_with_type_tag bool1 1 2 IsPointer void TestUnsigned(void *, int) __attribute__((pointer_with_type_tag(unsigned1,1,2))); // CHECK: FunctionDecl{{.*}}TestUnsigned -// CHECK: ArgumentWithTypeTagAttr{{.*}} pointer_with_type_tag unsigned1 0 1 +// CHECK: ArgumentWithTypeTagAttr{{.*}} pointer_with_type_tag unsigned1 1 2 void TestInt(void) __attribute__((constructor(123))); // CHECK: FunctionDecl{{.*}}TestInt Index: test/Sema/attr-ownership.cpp =================================================================== --- test/Sema/attr-ownership.cpp +++ test/Sema/attr-ownership.cpp @@ -0,0 +1,7 @@ +// RUN: %clang_cc1 %s -verify -fsyntax-only + +class C { + void f(int, int) + __attribute__((ownership_returns(foo, 2))) // expected-note {{declared with index 2 here}} + __attribute__((ownership_returns(foo, 3))); // expected-error {{'ownership_returns' attribute index does not match; here it is 3}} +}; Index: test/Sema/attr-print.cpp =================================================================== --- test/Sema/attr-print.cpp +++ test/Sema/attr-print.cpp @@ -1,6 +1,69 @@ // RUN: %clang_cc1 %s -ast-print | FileCheck %s +// This file is also used as input for %S/../Frontend/ast-attr.cpp. + +// CHECK: void xla(int a) __attribute__((xray_log_args(1))); +void xla(int a) __attribute__((xray_log_args(1))); + // CHECK: void *as2(int, int) __attribute__((alloc_size(1, 2))); void *as2(int, int) __attribute__((alloc_size(1, 2))); // CHECK: void *as1(void *, int) __attribute__((alloc_size(2))); void *as1(void *, int) __attribute__((alloc_size(2))); + +// CHECK: void fmt(int, const char *, ...) __attribute__((format(printf, 2, 3))); +void fmt(int, const char *, ...) __attribute__((format(printf, 2, 3))); + +// CHECK: char *fmta(int, const char *) __attribute__((format_arg(2))); +char *fmta(int, const char *) __attribute__((format_arg(2))); + +// CHECK: void nn(int *, int *) __attribute__((nonnull(1, 2))); +void nn(int *, int *) __attribute__((nonnull(1, 2))); + +// CHECK: int *aa(int i) __attribute__((alloc_align(1))); +int *aa(int i) __attribute__((alloc_align(1))); + +// CHECK: void ownt(int *, int *) __attribute__((ownership_takes(foo, 1, 2))); +void ownt(int *, int *) __attribute__((ownership_takes(foo, 1, 2))); +// CHECK: void ownh(int *, int *) __attribute__((ownership_holds(foo, 1, 2))); +void ownh(int *, int *) __attribute__((ownership_holds(foo, 1, 2))); +// CHECK: void ownr(int) __attribute__((ownership_returns(foo, 1))); +void ownr(int) __attribute__((ownership_returns(foo, 1))); + +// CHECK: void awtt(int, int, ...) __attribute__((argument_with_type_tag(foo, 3, 2))); +void awtt(int, int, ...) __attribute__((argument_with_type_tag(foo, 3, 2))); +// CHECK: void pwtt(void *, int) __attribute__((pointer_with_type_tag(foo, 1, 2))); +void pwtt(void *, int) __attribute__((pointer_with_type_tag(foo, 1, 2))); + +class C { + // CHECK: void xla(int a) __attribute__((xray_log_args(2))); + void xla(int a) __attribute__((xray_log_args(2))); + + // CHECK: void *as2(int, int) __attribute__((alloc_size(2, 3))); + void *as2(int, int) __attribute__((alloc_size(2, 3))); + // CHECK: void *as1(void *, int) __attribute__((alloc_size(3))); + void *as1(void *, int) __attribute__((alloc_size(3))); + + // CHECK: void fmt(int, const char *, ...) __attribute__((format(printf, 3, 4))); + void fmt(int, const char *, ...) __attribute__((format(printf, 3, 4))); + + // CHECK: char *fmta(int, const char *) __attribute__((format_arg(3))); + char *fmta(int, const char *) __attribute__((format_arg(3))); + + // CHECK: void nn(int *, int *) __attribute__((nonnull(2, 3))); + void nn(int *, int *) __attribute__((nonnull(2, 3))); + + // CHECK: int *aa(int i) __attribute__((alloc_align(2))); + int *aa(int i) __attribute__((alloc_align(2))); + + // CHECK: void ownt(int *, int *) __attribute__((ownership_takes(foo, 2, 3))); + void ownt(int *, int *) __attribute__((ownership_takes(foo, 2, 3))); + // CHECK: void ownh(int *, int *) __attribute__((ownership_holds(foo, 2, 3))); + void ownh(int *, int *) __attribute__((ownership_holds(foo, 2, 3))); + // CHECK: void ownr(int) __attribute__((ownership_returns(foo, 2))); + void ownr(int) __attribute__((ownership_returns(foo, 2))); + + // CHECK: void awtt(int, int, ...) __attribute__((argument_with_type_tag(foo, 4, 3))); + void awtt(int, int, ...) __attribute__((argument_with_type_tag(foo, 4, 3))); + // CHECK: void pwtt(void *, int) __attribute__((pointer_with_type_tag(foo, 2, 3))); + void pwtt(void *, int) __attribute__((pointer_with_type_tag(foo, 2, 3))); +}; Index: test/Sema/error-type-safety.cpp =================================================================== --- test/Sema/error-type-safety.cpp +++ test/Sema/error-type-safety.cpp @@ -3,21 +3,50 @@ #define INT_TAG 42 static const int test_in - __attribute__((type_tag_for_datatype(test, int))) = INT_TAG; + __attribute__((type_tag_for_datatype(test, int))) = INT_TAG; // Argument index: 1, Type tag index: 2 void test_bounds_index(...) - __attribute__((argument_with_type_tag(test, 1, 2))); + __attribute__((argument_with_type_tag(test, 1, 2))); + +// Argument index: 1, Type tag index: 2 +void test_bounds_index_ptr(void *, ...) + __attribute__((pointer_with_type_tag(test, 1, 2))); // Argument index: 3, Type tag index: 1 void test_bounds_arg_index(...) - __attribute__((argument_with_type_tag(test, 3, 1))); + __attribute__((argument_with_type_tag(test, 3, 1))); + +class C { +public: + // Argument index: 2, Type tag index: 3 + void test_bounds_index(...) + __attribute__((argument_with_type_tag(test, 2, 3))); + + // Argument index: 2, Type tag index: 3 + void test_bounds_index_ptr(void *, ...) + __attribute__((pointer_with_type_tag(test, 2, 3))); + + // Argument index: 4, Type tag index: 2 + void test_bounds_arg_index(...) + __attribute__((argument_with_type_tag(test, 4, 2))); +}; void test_bounds() { + C c; + // Test the boundary edges (ensure no off-by-one) with argument indexing. test_bounds_index(1, INT_TAG); + c.test_bounds_index(1, INT_TAG); + test_bounds_index_ptr(0, INT_TAG); + c.test_bounds_index_ptr(0, INT_TAG); + + test_bounds_index(1); // expected-error {{type tag index 2 is greater than the number of arguments specified}} + c.test_bounds_index(1); // expected-error {{type tag index 3 is greater than the number of arguments specified}} + test_bounds_index_ptr(0); // expected-error {{type tag index 2 is greater than the number of arguments specified}} + c.test_bounds_index_ptr(0); // expected-error {{type tag index 3 is greater than the number of arguments specified}} - test_bounds_index(1); // expected-error {{type tag index 2 is greater than the number of arguments specified}} - test_bounds_arg_index(INT_TAG, 1); // expected-error {{argument index 3 is greater than the number of arguments specified}} + test_bounds_arg_index(INT_TAG, 1); // expected-error {{argument index 3 is greater than the number of arguments specified}} + c.test_bounds_arg_index(INT_TAG, 1); // expected-error {{argument index 4 is greater than the number of arguments specified}} } Index: utils/TableGen/ClangAttrEmitter.cpp =================================================================== --- utils/TableGen/ClangAttrEmitter.cpp +++ utils/TableGen/ClangAttrEmitter.cpp @@ -104,6 +104,7 @@ .Case("Expr *", "Record.readExpr()") .Case("IdentifierInfo *", "Record.getIdentifierInfo()") .Case("StringRef", "Record.readString()") + .Case("ParamIdx", "ParamIdx::deserialize(Record.readInt())") .Default("Record.readInt()"); } @@ -122,6 +123,7 @@ .Case("Expr *", "AddStmt(" + std::string(name) + ");\n") .Case("IdentifierInfo *", "AddIdentifierRef(" + std::string(name) + ");\n") .Case("StringRef", "AddString(" + std::string(name) + ");\n") + .Case("ParamIdx", "push_back(" + std::string(name) + ".serialize());\n") .Default("push_back(" + std::string(name) + ");\n"); } @@ -302,9 +304,8 @@ std::string getIsOmitted() const override { if (type == "IdentifierInfo *") return "!get" + getUpperName().str() + "()"; - // FIXME: Do this declaratively in Attr.td. - if (getAttrName() == "AllocSize") - return "0 == get" + getUpperName().str() + "()"; + if (type == "ParamIdx") + return "!get" + getUpperName().str() + "().isValid()"; return "false"; } @@ -319,6 +320,8 @@ << "()->getName() : \"\") << \""; else if (type == "TypeSourceInfo *") OS << "\" << get" << getUpperName() << "().getAsString() << \""; + else if (type == "ParamIdx") + OS << "\" << get" << getUpperName() << "().getSourceIndex() << \""; else OS << "\" << get" << getUpperName() << "() << \""; } @@ -341,6 +344,11 @@ << getUpperName() << "\";\n"; } else if (type == "int" || type == "unsigned") { OS << " OS << \" \" << SA->get" << getUpperName() << "();\n"; + } else if (type == "ParamIdx") { + if (isOptional()) + OS << " if (SA->get" << getUpperName() << "().isValid())\n "; + OS << " OS << \" \" << SA->get" << getUpperName() + << "().getSourceIndex();\n"; } else { llvm_unreachable("Unknown SimpleArgument type!"); } @@ -618,6 +626,10 @@ virtual void writeValueImpl(raw_ostream &OS) const { OS << " OS << Val;\n"; } + // Assumed to receive a parameter: raw_ostream OS. + virtual void writeDumpImpl(raw_ostream &OS) const { + OS << " OS << \" \" << Val;\n"; + } public: VariadicArgument(const Record &Arg, StringRef Attr, std::string T) @@ -744,7 +756,22 @@ void writeDump(raw_ostream &OS) const override { OS << " for (const auto &Val : SA->" << RangeName << "())\n"; - OS << " OS << \" \" << Val;\n"; + writeDumpImpl(OS); + } + }; + + class VariadicParamIdxArgument : public VariadicArgument { + public: + VariadicParamIdxArgument(const Record &Arg, StringRef Attr) + : VariadicArgument(Arg, Attr, "ParamIdx") {} + + public: + void writeValueImpl(raw_ostream &OS) const override { + OS << " OS << Val.getSourceIndex();\n"; + } + + void writeDumpImpl(raw_ostream &OS) const override { + OS << " OS << \" \" << Val.getSourceIndex();\n"; } }; @@ -1247,6 +1274,10 @@ Ptr = llvm::make_unique(Arg, Attr); else if (ArgName == "VariadicExprArgument") Ptr = llvm::make_unique(Arg, Attr); + else if (ArgName == "VariadicParamIdxArgument") + Ptr = llvm::make_unique(Arg, Attr); + else if (ArgName == "ParamIdxArgument") + Ptr = llvm::make_unique(Arg, Attr, "ParamIdx"); else if (ArgName == "VersionArgument") Ptr = llvm::make_unique(Arg, Attr);