| File: | build-llvm/tools/clang/include/clang/AST/Attrs.inc |
| Warning: | line 9274, column 9 Null pointer passed as an argument to a 'nonnull' parameter |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
| 1 | //===--- SemaDeclAttr.cpp - Declaration Attribute Handling ----------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file implements decl-related attribute processing. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "clang/AST/ASTConsumer.h" |
| 15 | #include "clang/AST/ASTContext.h" |
| 16 | #include "clang/AST/ASTMutationListener.h" |
| 17 | #include "clang/AST/CXXInheritance.h" |
| 18 | #include "clang/AST/DeclCXX.h" |
| 19 | #include "clang/AST/DeclObjC.h" |
| 20 | #include "clang/AST/DeclTemplate.h" |
| 21 | #include "clang/AST/Expr.h" |
| 22 | #include "clang/AST/ExprCXX.h" |
| 23 | #include "clang/AST/Mangle.h" |
| 24 | #include "clang/AST/RecursiveASTVisitor.h" |
| 25 | #include "clang/Basic/CharInfo.h" |
| 26 | #include "clang/Basic/SourceManager.h" |
| 27 | #include "clang/Basic/TargetInfo.h" |
| 28 | #include "clang/Lex/Preprocessor.h" |
| 29 | #include "clang/Sema/DeclSpec.h" |
| 30 | #include "clang/Sema/DelayedDiagnostic.h" |
| 31 | #include "clang/Sema/Initialization.h" |
| 32 | #include "clang/Sema/Lookup.h" |
| 33 | #include "clang/Sema/Scope.h" |
| 34 | #include "clang/Sema/ScopeInfo.h" |
| 35 | #include "clang/Sema/SemaInternal.h" |
| 36 | #include "llvm/ADT/STLExtras.h" |
| 37 | #include "llvm/ADT/StringExtras.h" |
| 38 | #include "llvm/Support/MathExtras.h" |
| 39 | |
| 40 | using namespace clang; |
| 41 | using namespace sema; |
| 42 | |
| 43 | namespace AttributeLangSupport { |
| 44 | enum LANG { |
| 45 | C, |
| 46 | Cpp, |
| 47 | ObjC |
| 48 | }; |
| 49 | } // end namespace AttributeLangSupport |
| 50 | |
| 51 | //===----------------------------------------------------------------------===// |
| 52 | // Helper functions |
| 53 | //===----------------------------------------------------------------------===// |
| 54 | |
| 55 | /// isFunctionOrMethod - Return true if the given decl has function |
| 56 | /// type (function or function-typed variable) or an Objective-C |
| 57 | /// method. |
| 58 | static bool isFunctionOrMethod(const Decl *D) { |
| 59 | return (D->getFunctionType() != nullptr) || isa<ObjCMethodDecl>(D); |
| 60 | } |
| 61 | |
| 62 | /// Return true if the given decl has function type (function or |
| 63 | /// function-typed variable) or an Objective-C method or a block. |
| 64 | static bool isFunctionOrMethodOrBlock(const Decl *D) { |
| 65 | return isFunctionOrMethod(D) || isa<BlockDecl>(D); |
| 66 | } |
| 67 | |
| 68 | /// Return true if the given decl has a declarator that should have |
| 69 | /// been processed by Sema::GetTypeForDeclarator. |
| 70 | static bool hasDeclarator(const Decl *D) { |
| 71 | // In some sense, TypedefDecl really *ought* to be a DeclaratorDecl. |
| 72 | return isa<DeclaratorDecl>(D) || isa<BlockDecl>(D) || isa<TypedefNameDecl>(D) || |
| 73 | isa<ObjCPropertyDecl>(D); |
| 74 | } |
| 75 | |
| 76 | /// hasFunctionProto - Return true if the given decl has a argument |
| 77 | /// information. This decl should have already passed |
| 78 | /// isFunctionOrMethod or isFunctionOrMethodOrBlock. |
| 79 | static bool hasFunctionProto(const Decl *D) { |
| 80 | if (const FunctionType *FnTy = D->getFunctionType()) |
| 81 | return isa<FunctionProtoType>(FnTy); |
| 82 | return isa<ObjCMethodDecl>(D) || isa<BlockDecl>(D); |
| 83 | } |
| 84 | |
| 85 | /// getFunctionOrMethodNumParams - Return number of function or method |
| 86 | /// parameters. It is an error to call this on a K&R function (use |
| 87 | /// hasFunctionProto first). |
| 88 | static unsigned getFunctionOrMethodNumParams(const Decl *D) { |
| 89 | if (const FunctionType *FnTy = D->getFunctionType()) |
| 90 | return cast<FunctionProtoType>(FnTy)->getNumParams(); |
| 91 | if (const auto *BD = dyn_cast<BlockDecl>(D)) |
| 92 | return BD->getNumParams(); |
| 93 | return cast<ObjCMethodDecl>(D)->param_size(); |
| 94 | } |
| 95 | |
| 96 | static QualType getFunctionOrMethodParamType(const Decl *D, unsigned Idx) { |
| 97 | if (const FunctionType *FnTy = D->getFunctionType()) |
| 98 | return cast<FunctionProtoType>(FnTy)->getParamType(Idx); |
| 99 | if (const auto *BD = dyn_cast<BlockDecl>(D)) |
| 100 | return BD->getParamDecl(Idx)->getType(); |
| 101 | |
| 102 | return cast<ObjCMethodDecl>(D)->parameters()[Idx]->getType(); |
| 103 | } |
| 104 | |
| 105 | static SourceRange getFunctionOrMethodParamRange(const Decl *D, unsigned Idx) { |
| 106 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) |
| 107 | return FD->getParamDecl(Idx)->getSourceRange(); |
| 108 | if (const auto *MD = dyn_cast<ObjCMethodDecl>(D)) |
| 109 | return MD->parameters()[Idx]->getSourceRange(); |
| 110 | if (const auto *BD = dyn_cast<BlockDecl>(D)) |
| 111 | return BD->getParamDecl(Idx)->getSourceRange(); |
| 112 | return SourceRange(); |
| 113 | } |
| 114 | |
| 115 | static QualType getFunctionOrMethodResultType(const Decl *D) { |
| 116 | if (const FunctionType *FnTy = D->getFunctionType()) |
| 117 | return FnTy->getReturnType(); |
| 118 | return cast<ObjCMethodDecl>(D)->getReturnType(); |
| 119 | } |
| 120 | |
| 121 | static SourceRange getFunctionOrMethodResultSourceRange(const Decl *D) { |
| 122 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) |
| 123 | return FD->getReturnTypeSourceRange(); |
| 124 | if (const auto *MD = dyn_cast<ObjCMethodDecl>(D)) |
| 125 | return MD->getReturnTypeSourceRange(); |
| 126 | return SourceRange(); |
| 127 | } |
| 128 | |
| 129 | static bool isFunctionOrMethodVariadic(const Decl *D) { |
| 130 | if (const FunctionType *FnTy = D->getFunctionType()) |
| 131 | return cast<FunctionProtoType>(FnTy)->isVariadic(); |
| 132 | if (const auto *BD = dyn_cast<BlockDecl>(D)) |
| 133 | return BD->isVariadic(); |
| 134 | return cast<ObjCMethodDecl>(D)->isVariadic(); |
| 135 | } |
| 136 | |
| 137 | static bool isInstanceMethod(const Decl *D) { |
| 138 | if (const auto *MethodDecl = dyn_cast<CXXMethodDecl>(D)) |
| 139 | return MethodDecl->isInstance(); |
| 140 | return false; |
| 141 | } |
| 142 | |
| 143 | static inline bool isNSStringType(QualType T, ASTContext &Ctx) { |
| 144 | const auto *PT = T->getAs<ObjCObjectPointerType>(); |
| 145 | if (!PT) |
| 146 | return false; |
| 147 | |
| 148 | ObjCInterfaceDecl *Cls = PT->getObjectType()->getInterface(); |
| 149 | if (!Cls) |
| 150 | return false; |
| 151 | |
| 152 | IdentifierInfo* ClsName = Cls->getIdentifier(); |
| 153 | |
| 154 | // FIXME: Should we walk the chain of classes? |
| 155 | return ClsName == &Ctx.Idents.get("NSString") || |
| 156 | ClsName == &Ctx.Idents.get("NSMutableString"); |
| 157 | } |
| 158 | |
| 159 | static inline bool isCFStringType(QualType T, ASTContext &Ctx) { |
| 160 | const auto *PT = T->getAs<PointerType>(); |
| 161 | if (!PT) |
| 162 | return false; |
| 163 | |
| 164 | const auto *RT = PT->getPointeeType()->getAs<RecordType>(); |
| 165 | if (!RT) |
| 166 | return false; |
| 167 | |
| 168 | const RecordDecl *RD = RT->getDecl(); |
| 169 | if (RD->getTagKind() != TTK_Struct) |
| 170 | return false; |
| 171 | |
| 172 | return RD->getIdentifier() == &Ctx.Idents.get("__CFString"); |
| 173 | } |
| 174 | |
| 175 | static unsigned getNumAttributeArgs(const ParsedAttr &AL) { |
| 176 | // FIXME: Include the type in the argument list. |
| 177 | return AL.getNumArgs() + AL.hasParsedType(); |
| 178 | } |
| 179 | |
| 180 | template <typename Compare> |
| 181 | static bool checkAttributeNumArgsImpl(Sema &S, const ParsedAttr &AL, |
| 182 | unsigned Num, unsigned Diag, |
| 183 | Compare Comp) { |
| 184 | if (Comp(getNumAttributeArgs(AL), Num)) { |
| 185 | S.Diag(AL.getLoc(), Diag) << AL << Num; |
| 186 | return false; |
| 187 | } |
| 188 | |
| 189 | return true; |
| 190 | } |
| 191 | |
| 192 | /// Check if the attribute has exactly as many args as Num. May |
| 193 | /// output an error. |
| 194 | static bool checkAttributeNumArgs(Sema &S, const ParsedAttr &AL, unsigned Num) { |
| 195 | return checkAttributeNumArgsImpl(S, AL, Num, |
| 196 | diag::err_attribute_wrong_number_arguments, |
| 197 | std::not_equal_to<unsigned>()); |
| 198 | } |
| 199 | |
| 200 | /// Check if the attribute has at least as many args as Num. May |
| 201 | /// output an error. |
| 202 | static bool checkAttributeAtLeastNumArgs(Sema &S, const ParsedAttr &AL, |
| 203 | unsigned Num) { |
| 204 | return checkAttributeNumArgsImpl(S, AL, Num, |
| 205 | diag::err_attribute_too_few_arguments, |
| 206 | std::less<unsigned>()); |
| 207 | } |
| 208 | |
| 209 | /// Check if the attribute has at most as many args as Num. May |
| 210 | /// output an error. |
| 211 | static bool checkAttributeAtMostNumArgs(Sema &S, const ParsedAttr &AL, |
| 212 | unsigned Num) { |
| 213 | return checkAttributeNumArgsImpl(S, AL, Num, |
| 214 | diag::err_attribute_too_many_arguments, |
| 215 | std::greater<unsigned>()); |
| 216 | } |
| 217 | |
| 218 | /// A helper function to provide Attribute Location for the Attr types |
| 219 | /// AND the ParsedAttr. |
| 220 | template <typename AttrInfo> |
| 221 | static typename std::enable_if<std::is_base_of<Attr, AttrInfo>::value, |
| 222 | SourceLocation>::type |
| 223 | getAttrLoc(const AttrInfo &AL) { |
| 224 | return AL.getLocation(); |
| 225 | } |
| 226 | static SourceLocation getAttrLoc(const ParsedAttr &AL) { return AL.getLoc(); } |
| 227 | |
| 228 | /// If Expr is a valid integer constant, get the value of the integer |
| 229 | /// expression and return success or failure. May output an error. |
| 230 | /// |
| 231 | /// Negative argument is implicitly converted to unsigned, unless |
| 232 | /// \p StrictlyUnsigned is true. |
| 233 | template <typename AttrInfo> |
| 234 | static bool checkUInt32Argument(Sema &S, const AttrInfo &AI, const Expr *Expr, |
| 235 | uint32_t &Val, unsigned Idx = UINT_MAX(2147483647 *2U +1U), |
| 236 | bool StrictlyUnsigned = false) { |
| 237 | llvm::APSInt I(32); |
| 238 | if (Expr->isTypeDependent() || Expr->isValueDependent() || |
| 239 | !Expr->isIntegerConstantExpr(I, S.Context)) { |
| 240 | if (Idx != UINT_MAX(2147483647 *2U +1U)) |
| 241 | S.Diag(getAttrLoc(AI), diag::err_attribute_argument_n_type) |
| 242 | << AI << Idx << AANT_ArgumentIntegerConstant |
| 243 | << Expr->getSourceRange(); |
| 244 | else |
| 245 | S.Diag(getAttrLoc(AI), diag::err_attribute_argument_type) |
| 246 | << AI << AANT_ArgumentIntegerConstant << Expr->getSourceRange(); |
| 247 | return false; |
| 248 | } |
| 249 | |
| 250 | if (!I.isIntN(32)) { |
| 251 | S.Diag(Expr->getExprLoc(), diag::err_ice_too_large) |
| 252 | << I.toString(10, false) << 32 << /* Unsigned */ 1; |
| 253 | return false; |
| 254 | } |
| 255 | |
| 256 | if (StrictlyUnsigned && I.isSigned() && I.isNegative()) { |
| 257 | S.Diag(getAttrLoc(AI), diag::err_attribute_requires_positive_integer) |
| 258 | << AI << /*non-negative*/ 1; |
| 259 | return false; |
| 260 | } |
| 261 | |
| 262 | Val = (uint32_t)I.getZExtValue(); |
| 263 | return true; |
| 264 | } |
| 265 | |
| 266 | /// Wrapper around checkUInt32Argument, with an extra check to be sure |
| 267 | /// that the result will fit into a regular (signed) int. All args have the same |
| 268 | /// purpose as they do in checkUInt32Argument. |
| 269 | template <typename AttrInfo> |
| 270 | static bool checkPositiveIntArgument(Sema &S, const AttrInfo &AI, const Expr *Expr, |
| 271 | int &Val, unsigned Idx = UINT_MAX(2147483647 *2U +1U)) { |
| 272 | uint32_t UVal; |
| 273 | if (!checkUInt32Argument(S, AI, Expr, UVal, Idx)) |
| 274 | return false; |
| 275 | |
| 276 | if (UVal > (uint32_t)std::numeric_limits<int>::max()) { |
| 277 | llvm::APSInt I(32); // for toString |
| 278 | I = UVal; |
| 279 | S.Diag(Expr->getExprLoc(), diag::err_ice_too_large) |
| 280 | << I.toString(10, false) << 32 << /* Unsigned */ 0; |
| 281 | return false; |
| 282 | } |
| 283 | |
| 284 | Val = UVal; |
| 285 | return true; |
| 286 | } |
| 287 | |
| 288 | /// Diagnose mutually exclusive attributes when present on a given |
| 289 | /// declaration. Returns true if diagnosed. |
| 290 | template <typename AttrTy> |
| 291 | static bool checkAttrMutualExclusion(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 292 | if (const auto *A = D->getAttr<AttrTy>()) { |
| 293 | S.Diag(AL.getLoc(), diag::err_attributes_are_not_compatible) << AL << A; |
| 294 | S.Diag(A->getLocation(), diag::note_conflicting_attribute); |
| 295 | return true; |
| 296 | } |
| 297 | return false; |
| 298 | } |
| 299 | |
| 300 | template <typename AttrTy> |
| 301 | static bool checkAttrMutualExclusion(Sema &S, Decl *D, const Attr &AL) { |
| 302 | if (const auto *A = D->getAttr<AttrTy>()) { |
| 303 | S.Diag(AL.getLocation(), diag::err_attributes_are_not_compatible) << &AL |
| 304 | << A; |
| 305 | S.Diag(A->getLocation(), diag::note_conflicting_attribute); |
| 306 | return true; |
| 307 | } |
| 308 | return false; |
| 309 | } |
| 310 | |
| 311 | /// Check if IdxExpr is a valid parameter index for a function or |
| 312 | /// instance method D. May output an error. |
| 313 | /// |
| 314 | /// \returns true if IdxExpr is a valid index. |
| 315 | template <typename AttrInfo> |
| 316 | static bool checkFunctionOrMethodParameterIndex( |
| 317 | Sema &S, const Decl *D, const AttrInfo &AI, unsigned AttrArgNum, |
| 318 | const Expr *IdxExpr, ParamIdx &Idx, bool CanIndexImplicitThis = false) { |
| 319 | assert(isFunctionOrMethodOrBlock(D))((isFunctionOrMethodOrBlock(D)) ? static_cast<void> (0) : __assert_fail ("isFunctionOrMethodOrBlock(D)", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 319, __PRETTY_FUNCTION__)); |
| 320 | |
| 321 | // In C++ the implicit 'this' function parameter also counts. |
| 322 | // Parameters are counted from one. |
| 323 | bool HP = hasFunctionProto(D); |
| 324 | bool HasImplicitThisParam = isInstanceMethod(D); |
| 325 | bool IV = HP && isFunctionOrMethodVariadic(D); |
| 326 | unsigned NumParams = |
| 327 | (HP ? getFunctionOrMethodNumParams(D) : 0) + HasImplicitThisParam; |
| 328 | |
| 329 | llvm::APSInt IdxInt; |
| 330 | if (IdxExpr->isTypeDependent() || IdxExpr->isValueDependent() || |
| 331 | !IdxExpr->isIntegerConstantExpr(IdxInt, S.Context)) { |
| 332 | S.Diag(getAttrLoc(AI), diag::err_attribute_argument_n_type) |
| 333 | << &AI << AttrArgNum << AANT_ArgumentIntegerConstant |
| 334 | << IdxExpr->getSourceRange(); |
| 335 | return false; |
| 336 | } |
| 337 | |
| 338 | unsigned IdxSource = IdxInt.getLimitedValue(UINT_MAX(2147483647 *2U +1U)); |
| 339 | if (IdxSource < 1 || (!IV && IdxSource > NumParams)) { |
| 340 | S.Diag(getAttrLoc(AI), diag::err_attribute_argument_out_of_bounds) |
| 341 | << &AI << AttrArgNum << IdxExpr->getSourceRange(); |
| 342 | return false; |
| 343 | } |
| 344 | if (HasImplicitThisParam && !CanIndexImplicitThis) { |
| 345 | if (IdxSource == 1) { |
| 346 | S.Diag(getAttrLoc(AI), diag::err_attribute_invalid_implicit_this_argument) |
| 347 | << &AI << IdxExpr->getSourceRange(); |
| 348 | return false; |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | Idx = ParamIdx(IdxSource, D); |
| 353 | return true; |
| 354 | } |
| 355 | |
| 356 | /// Check if the argument \p ArgNum of \p Attr is a ASCII string literal. |
| 357 | /// If not emit an error and return false. If the argument is an identifier it |
| 358 | /// will emit an error with a fixit hint and treat it as if it was a string |
| 359 | /// literal. |
| 360 | bool Sema::checkStringLiteralArgumentAttr(const ParsedAttr &AL, unsigned ArgNum, |
| 361 | StringRef &Str, |
| 362 | SourceLocation *ArgLocation) { |
| 363 | // Look for identifiers. If we have one emit a hint to fix it to a literal. |
| 364 | if (AL.isArgIdent(ArgNum)) { |
| 365 | IdentifierLoc *Loc = AL.getArgAsIdent(ArgNum); |
| 366 | Diag(Loc->Loc, diag::err_attribute_argument_type) |
| 367 | << AL << AANT_ArgumentString |
| 368 | << FixItHint::CreateInsertion(Loc->Loc, "\"") |
| 369 | << FixItHint::CreateInsertion(getLocForEndOfToken(Loc->Loc), "\""); |
| 370 | Str = Loc->Ident->getName(); |
| 371 | if (ArgLocation) |
| 372 | *ArgLocation = Loc->Loc; |
| 373 | return true; |
| 374 | } |
| 375 | |
| 376 | // Now check for an actual string literal. |
| 377 | Expr *ArgExpr = AL.getArgAsExpr(ArgNum); |
| 378 | const auto *Literal = dyn_cast<StringLiteral>(ArgExpr->IgnoreParenCasts()); |
| 379 | if (ArgLocation) |
| 380 | *ArgLocation = ArgExpr->getBeginLoc(); |
| 381 | |
| 382 | if (!Literal || !Literal->isAscii()) { |
| 383 | Diag(ArgExpr->getBeginLoc(), diag::err_attribute_argument_type) |
| 384 | << AL << AANT_ArgumentString; |
| 385 | return false; |
| 386 | } |
| 387 | |
| 388 | Str = Literal->getString(); |
| 389 | return true; |
| 390 | } |
| 391 | |
| 392 | /// Applies the given attribute to the Decl without performing any |
| 393 | /// additional semantic checking. |
| 394 | template <typename AttrType> |
| 395 | static void handleSimpleAttribute(Sema &S, Decl *D, SourceRange SR, |
| 396 | unsigned SpellingIndex) { |
| 397 | D->addAttr(::new (S.Context) AttrType(SR, S.Context, SpellingIndex)); |
| 398 | } |
| 399 | |
| 400 | template <typename AttrType> |
| 401 | static void handleSimpleAttribute(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 402 | handleSimpleAttribute<AttrType>(S, D, AL.getRange(), |
| 403 | AL.getAttributeSpellingListIndex()); |
| 404 | } |
| 405 | |
| 406 | |
| 407 | template <typename... DiagnosticArgs> |
| 408 | static const Sema::SemaDiagnosticBuilder& |
| 409 | appendDiagnostics(const Sema::SemaDiagnosticBuilder &Bldr) { |
| 410 | return Bldr; |
| 411 | } |
| 412 | |
| 413 | template <typename T, typename... DiagnosticArgs> |
| 414 | static const Sema::SemaDiagnosticBuilder& |
| 415 | appendDiagnostics(const Sema::SemaDiagnosticBuilder &Bldr, T &&ExtraArg, |
| 416 | DiagnosticArgs &&... ExtraArgs) { |
| 417 | return appendDiagnostics(Bldr << std::forward<T>(ExtraArg), |
| 418 | std::forward<DiagnosticArgs>(ExtraArgs)...); |
| 419 | } |
| 420 | |
| 421 | /// Add an attribute {@code AttrType} to declaration {@code D}, |
| 422 | /// provided the given {@code Check} function returns {@code true} |
| 423 | /// on type of {@code D}. |
| 424 | /// If check does not pass, emit diagnostic {@code DiagID}, |
| 425 | /// passing in all parameters specified in {@code ExtraArgs}. |
| 426 | template <typename AttrType, typename... DiagnosticArgs> |
| 427 | static void |
| 428 | handleSimpleAttributeWithCheck(Sema &S, ValueDecl *D, SourceRange SR, |
| 429 | unsigned SpellingIndex, |
| 430 | llvm::function_ref<bool(QualType)> Check, |
| 431 | unsigned DiagID, DiagnosticArgs... ExtraArgs) { |
| 432 | if (!Check(D->getType())) { |
| 433 | Sema::SemaDiagnosticBuilder DB = S.Diag(D->getBeginLoc(), DiagID); |
| 434 | appendDiagnostics(DB, std::forward<DiagnosticArgs>(ExtraArgs)...); |
| 435 | return; |
| 436 | } |
| 437 | handleSimpleAttribute<AttrType>(S, D, SR, SpellingIndex); |
| 438 | } |
| 439 | |
| 440 | template <typename AttrType> |
| 441 | static void handleSimpleAttributeWithExclusions(Sema &S, Decl *D, |
| 442 | const ParsedAttr &AL) { |
| 443 | handleSimpleAttribute<AttrType>(S, D, AL); |
| 444 | } |
| 445 | |
| 446 | /// Applies the given attribute to the Decl so long as the Decl doesn't |
| 447 | /// already have one of the given incompatible attributes. |
| 448 | template <typename AttrType, typename IncompatibleAttrType, |
| 449 | typename... IncompatibleAttrTypes> |
| 450 | static void handleSimpleAttributeWithExclusions(Sema &S, Decl *D, |
| 451 | const ParsedAttr &AL) { |
| 452 | if (checkAttrMutualExclusion<IncompatibleAttrType>(S, D, AL)) |
| 453 | return; |
| 454 | handleSimpleAttributeWithExclusions<AttrType, IncompatibleAttrTypes...>(S, D, |
| 455 | AL); |
| 456 | } |
| 457 | |
| 458 | /// Check if the passed-in expression is of type int or bool. |
| 459 | static bool isIntOrBool(Expr *Exp) { |
| 460 | QualType QT = Exp->getType(); |
| 461 | return QT->isBooleanType() || QT->isIntegerType(); |
| 462 | } |
| 463 | |
| 464 | |
| 465 | // Check to see if the type is a smart pointer of some kind. We assume |
| 466 | // it's a smart pointer if it defines both operator-> and operator*. |
| 467 | static bool threadSafetyCheckIsSmartPointer(Sema &S, const RecordType* RT) { |
| 468 | auto IsOverloadedOperatorPresent = [&S](const RecordDecl *Record, |
| 469 | OverloadedOperatorKind Op) { |
| 470 | DeclContextLookupResult Result = |
| 471 | Record->lookup(S.Context.DeclarationNames.getCXXOperatorName(Op)); |
| 472 | return !Result.empty(); |
| 473 | }; |
| 474 | |
| 475 | const RecordDecl *Record = RT->getDecl(); |
| 476 | bool foundStarOperator = IsOverloadedOperatorPresent(Record, OO_Star); |
| 477 | bool foundArrowOperator = IsOverloadedOperatorPresent(Record, OO_Arrow); |
| 478 | if (foundStarOperator && foundArrowOperator) |
| 479 | return true; |
| 480 | |
| 481 | const CXXRecordDecl *CXXRecord = dyn_cast<CXXRecordDecl>(Record); |
| 482 | if (!CXXRecord) |
| 483 | return false; |
| 484 | |
| 485 | for (auto BaseSpecifier : CXXRecord->bases()) { |
| 486 | if (!foundStarOperator) |
| 487 | foundStarOperator = IsOverloadedOperatorPresent( |
| 488 | BaseSpecifier.getType()->getAsRecordDecl(), OO_Star); |
| 489 | if (!foundArrowOperator) |
| 490 | foundArrowOperator = IsOverloadedOperatorPresent( |
| 491 | BaseSpecifier.getType()->getAsRecordDecl(), OO_Arrow); |
| 492 | } |
| 493 | |
| 494 | if (foundStarOperator && foundArrowOperator) |
| 495 | return true; |
| 496 | |
| 497 | return false; |
| 498 | } |
| 499 | |
| 500 | /// Check if passed in Decl is a pointer type. |
| 501 | /// Note that this function may produce an error message. |
| 502 | /// \return true if the Decl is a pointer type; false otherwise |
| 503 | static bool threadSafetyCheckIsPointer(Sema &S, const Decl *D, |
| 504 | const ParsedAttr &AL) { |
| 505 | const auto *VD = cast<ValueDecl>(D); |
| 506 | QualType QT = VD->getType(); |
| 507 | if (QT->isAnyPointerType()) |
| 508 | return true; |
| 509 | |
| 510 | if (const auto *RT = QT->getAs<RecordType>()) { |
| 511 | // If it's an incomplete type, it could be a smart pointer; skip it. |
| 512 | // (We don't want to force template instantiation if we can avoid it, |
| 513 | // since that would alter the order in which templates are instantiated.) |
| 514 | if (RT->isIncompleteType()) |
| 515 | return true; |
| 516 | |
| 517 | if (threadSafetyCheckIsSmartPointer(S, RT)) |
| 518 | return true; |
| 519 | } |
| 520 | |
| 521 | S.Diag(AL.getLoc(), diag::warn_thread_attribute_decl_not_pointer) << AL << QT; |
| 522 | return false; |
| 523 | } |
| 524 | |
| 525 | /// Checks that the passed in QualType either is of RecordType or points |
| 526 | /// to RecordType. Returns the relevant RecordType, null if it does not exit. |
| 527 | static const RecordType *getRecordType(QualType QT) { |
| 528 | if (const auto *RT = QT->getAs<RecordType>()) |
| 529 | return RT; |
| 530 | |
| 531 | // Now check if we point to record type. |
| 532 | if (const auto *PT = QT->getAs<PointerType>()) |
| 533 | return PT->getPointeeType()->getAs<RecordType>(); |
| 534 | |
| 535 | return nullptr; |
| 536 | } |
| 537 | |
| 538 | template <typename AttrType> |
| 539 | static bool checkRecordDeclForAttr(const RecordDecl *RD) { |
| 540 | // Check if the record itself has the attribute. |
| 541 | if (RD->hasAttr<AttrType>()) |
| 542 | return true; |
| 543 | |
| 544 | // Else check if any base classes have the attribute. |
| 545 | if (const auto *CRD = dyn_cast<CXXRecordDecl>(RD)) { |
| 546 | CXXBasePaths BPaths(false, false); |
| 547 | if (CRD->lookupInBases( |
| 548 | [](const CXXBaseSpecifier *BS, CXXBasePath &) { |
| 549 | const auto &Ty = *BS->getType(); |
| 550 | // If it's type-dependent, we assume it could have the attribute. |
| 551 | if (Ty.isDependentType()) |
| 552 | return true; |
| 553 | return Ty.getAs<RecordType>()->getDecl()->hasAttr<AttrType>(); |
| 554 | }, |
| 555 | BPaths, true)) |
| 556 | return true; |
| 557 | } |
| 558 | return false; |
| 559 | } |
| 560 | |
| 561 | static bool checkRecordTypeForCapability(Sema &S, QualType Ty) { |
| 562 | const RecordType *RT = getRecordType(Ty); |
| 563 | |
| 564 | if (!RT) |
| 565 | return false; |
| 566 | |
| 567 | // Don't check for the capability if the class hasn't been defined yet. |
| 568 | if (RT->isIncompleteType()) |
| 569 | return true; |
| 570 | |
| 571 | // Allow smart pointers to be used as capability objects. |
| 572 | // FIXME -- Check the type that the smart pointer points to. |
| 573 | if (threadSafetyCheckIsSmartPointer(S, RT)) |
| 574 | return true; |
| 575 | |
| 576 | return checkRecordDeclForAttr<CapabilityAttr>(RT->getDecl()); |
| 577 | } |
| 578 | |
| 579 | static bool checkTypedefTypeForCapability(QualType Ty) { |
| 580 | const auto *TD = Ty->getAs<TypedefType>(); |
| 581 | if (!TD) |
| 582 | return false; |
| 583 | |
| 584 | TypedefNameDecl *TN = TD->getDecl(); |
| 585 | if (!TN) |
| 586 | return false; |
| 587 | |
| 588 | return TN->hasAttr<CapabilityAttr>(); |
| 589 | } |
| 590 | |
| 591 | static bool typeHasCapability(Sema &S, QualType Ty) { |
| 592 | if (checkTypedefTypeForCapability(Ty)) |
| 593 | return true; |
| 594 | |
| 595 | if (checkRecordTypeForCapability(S, Ty)) |
| 596 | return true; |
| 597 | |
| 598 | return false; |
| 599 | } |
| 600 | |
| 601 | static bool isCapabilityExpr(Sema &S, const Expr *Ex) { |
| 602 | // Capability expressions are simple expressions involving the boolean logic |
| 603 | // operators &&, || or !, a simple DeclRefExpr, CastExpr or a ParenExpr. Once |
| 604 | // a DeclRefExpr is found, its type should be checked to determine whether it |
| 605 | // is a capability or not. |
| 606 | |
| 607 | if (const auto *E = dyn_cast<CastExpr>(Ex)) |
| 608 | return isCapabilityExpr(S, E->getSubExpr()); |
| 609 | else if (const auto *E = dyn_cast<ParenExpr>(Ex)) |
| 610 | return isCapabilityExpr(S, E->getSubExpr()); |
| 611 | else if (const auto *E = dyn_cast<UnaryOperator>(Ex)) { |
| 612 | if (E->getOpcode() == UO_LNot || E->getOpcode() == UO_AddrOf || |
| 613 | E->getOpcode() == UO_Deref) |
| 614 | return isCapabilityExpr(S, E->getSubExpr()); |
| 615 | return false; |
| 616 | } else if (const auto *E = dyn_cast<BinaryOperator>(Ex)) { |
| 617 | if (E->getOpcode() == BO_LAnd || E->getOpcode() == BO_LOr) |
| 618 | return isCapabilityExpr(S, E->getLHS()) && |
| 619 | isCapabilityExpr(S, E->getRHS()); |
| 620 | return false; |
| 621 | } |
| 622 | |
| 623 | return typeHasCapability(S, Ex->getType()); |
| 624 | } |
| 625 | |
| 626 | /// Checks that all attribute arguments, starting from Sidx, resolve to |
| 627 | /// a capability object. |
| 628 | /// \param Sidx The attribute argument index to start checking with. |
| 629 | /// \param ParamIdxOk Whether an argument can be indexing into a function |
| 630 | /// parameter list. |
| 631 | static void checkAttrArgsAreCapabilityObjs(Sema &S, Decl *D, |
| 632 | const ParsedAttr &AL, |
| 633 | SmallVectorImpl<Expr *> &Args, |
| 634 | unsigned Sidx = 0, |
| 635 | bool ParamIdxOk = false) { |
| 636 | if (Sidx == AL.getNumArgs()) { |
| 637 | // If we don't have any capability arguments, the attribute implicitly |
| 638 | // refers to 'this'. So we need to make sure that 'this' exists, i.e. we're |
| 639 | // a non-static method, and that the class is a (scoped) capability. |
| 640 | const auto *MD = dyn_cast<const CXXMethodDecl>(D); |
| 641 | if (MD && !MD->isStatic()) { |
| 642 | const CXXRecordDecl *RD = MD->getParent(); |
| 643 | // FIXME -- need to check this again on template instantiation |
| 644 | if (!checkRecordDeclForAttr<CapabilityAttr>(RD) && |
| 645 | !checkRecordDeclForAttr<ScopedLockableAttr>(RD)) |
| 646 | S.Diag(AL.getLoc(), |
| 647 | diag::warn_thread_attribute_not_on_capability_member) |
| 648 | << AL << MD->getParent(); |
| 649 | } else { |
| 650 | S.Diag(AL.getLoc(), diag::warn_thread_attribute_not_on_non_static_member) |
| 651 | << AL; |
| 652 | } |
| 653 | } |
| 654 | |
| 655 | for (unsigned Idx = Sidx; Idx < AL.getNumArgs(); ++Idx) { |
| 656 | Expr *ArgExp = AL.getArgAsExpr(Idx); |
| 657 | |
| 658 | if (ArgExp->isTypeDependent()) { |
| 659 | // FIXME -- need to check this again on template instantiation |
| 660 | Args.push_back(ArgExp); |
| 661 | continue; |
| 662 | } |
| 663 | |
| 664 | if (const auto *StrLit = dyn_cast<StringLiteral>(ArgExp)) { |
| 665 | if (StrLit->getLength() == 0 || |
| 666 | (StrLit->isAscii() && StrLit->getString() == StringRef("*"))) { |
| 667 | // Pass empty strings to the analyzer without warnings. |
| 668 | // Treat "*" as the universal lock. |
| 669 | Args.push_back(ArgExp); |
| 670 | continue; |
| 671 | } |
| 672 | |
| 673 | // We allow constant strings to be used as a placeholder for expressions |
| 674 | // that are not valid C++ syntax, but warn that they are ignored. |
| 675 | S.Diag(AL.getLoc(), diag::warn_thread_attribute_ignored) << AL; |
| 676 | Args.push_back(ArgExp); |
| 677 | continue; |
| 678 | } |
| 679 | |
| 680 | QualType ArgTy = ArgExp->getType(); |
| 681 | |
| 682 | // A pointer to member expression of the form &MyClass::mu is treated |
| 683 | // specially -- we need to look at the type of the member. |
| 684 | if (const auto *UOp = dyn_cast<UnaryOperator>(ArgExp)) |
| 685 | if (UOp->getOpcode() == UO_AddrOf) |
| 686 | if (const auto *DRE = dyn_cast<DeclRefExpr>(UOp->getSubExpr())) |
| 687 | if (DRE->getDecl()->isCXXInstanceMember()) |
| 688 | ArgTy = DRE->getDecl()->getType(); |
| 689 | |
| 690 | // First see if we can just cast to record type, or pointer to record type. |
| 691 | const RecordType *RT = getRecordType(ArgTy); |
| 692 | |
| 693 | // Now check if we index into a record type function param. |
| 694 | if(!RT && ParamIdxOk) { |
| 695 | const auto *FD = dyn_cast<FunctionDecl>(D); |
| 696 | const auto *IL = dyn_cast<IntegerLiteral>(ArgExp); |
| 697 | if(FD && IL) { |
| 698 | unsigned int NumParams = FD->getNumParams(); |
| 699 | llvm::APInt ArgValue = IL->getValue(); |
| 700 | uint64_t ParamIdxFromOne = ArgValue.getZExtValue(); |
| 701 | uint64_t ParamIdxFromZero = ParamIdxFromOne - 1; |
| 702 | if (!ArgValue.isStrictlyPositive() || ParamIdxFromOne > NumParams) { |
| 703 | S.Diag(AL.getLoc(), diag::err_attribute_argument_out_of_range) |
| 704 | << AL << Idx + 1 << NumParams; |
| 705 | continue; |
| 706 | } |
| 707 | ArgTy = FD->getParamDecl(ParamIdxFromZero)->getType(); |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | // If the type does not have a capability, see if the components of the |
| 712 | // expression have capabilities. This allows for writing C code where the |
| 713 | // capability may be on the type, and the expression is a capability |
| 714 | // boolean logic expression. Eg) requires_capability(A || B && !C) |
| 715 | if (!typeHasCapability(S, ArgTy) && !isCapabilityExpr(S, ArgExp)) |
| 716 | S.Diag(AL.getLoc(), diag::warn_thread_attribute_argument_not_lockable) |
| 717 | << AL << ArgTy; |
| 718 | |
| 719 | Args.push_back(ArgExp); |
| 720 | } |
| 721 | } |
| 722 | |
| 723 | //===----------------------------------------------------------------------===// |
| 724 | // Attribute Implementations |
| 725 | //===----------------------------------------------------------------------===// |
| 726 | |
| 727 | static void handlePtGuardedVarAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 728 | if (!threadSafetyCheckIsPointer(S, D, AL)) |
| 729 | return; |
| 730 | |
| 731 | D->addAttr(::new (S.Context) |
| 732 | PtGuardedVarAttr(AL.getRange(), S.Context, |
| 733 | AL.getAttributeSpellingListIndex())); |
| 734 | } |
| 735 | |
| 736 | static bool checkGuardedByAttrCommon(Sema &S, Decl *D, const ParsedAttr &AL, |
| 737 | Expr *&Arg) { |
| 738 | SmallVector<Expr *, 1> Args; |
| 739 | // check that all arguments are lockable objects |
| 740 | checkAttrArgsAreCapabilityObjs(S, D, AL, Args); |
| 741 | unsigned Size = Args.size(); |
| 742 | if (Size != 1) |
| 743 | return false; |
| 744 | |
| 745 | Arg = Args[0]; |
| 746 | |
| 747 | return true; |
| 748 | } |
| 749 | |
| 750 | static void handleGuardedByAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 751 | Expr *Arg = nullptr; |
| 752 | if (!checkGuardedByAttrCommon(S, D, AL, Arg)) |
| 753 | return; |
| 754 | |
| 755 | D->addAttr(::new (S.Context) GuardedByAttr( |
| 756 | AL.getRange(), S.Context, Arg, AL.getAttributeSpellingListIndex())); |
| 757 | } |
| 758 | |
| 759 | static void handlePtGuardedByAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 760 | Expr *Arg = nullptr; |
| 761 | if (!checkGuardedByAttrCommon(S, D, AL, Arg)) |
| 762 | return; |
| 763 | |
| 764 | if (!threadSafetyCheckIsPointer(S, D, AL)) |
| 765 | return; |
| 766 | |
| 767 | D->addAttr(::new (S.Context) PtGuardedByAttr( |
| 768 | AL.getRange(), S.Context, Arg, AL.getAttributeSpellingListIndex())); |
| 769 | } |
| 770 | |
| 771 | static bool checkAcquireOrderAttrCommon(Sema &S, Decl *D, const ParsedAttr &AL, |
| 772 | SmallVectorImpl<Expr *> &Args) { |
| 773 | if (!checkAttributeAtLeastNumArgs(S, AL, 1)) |
| 774 | return false; |
| 775 | |
| 776 | // Check that this attribute only applies to lockable types. |
| 777 | QualType QT = cast<ValueDecl>(D)->getType(); |
| 778 | if (!QT->isDependentType() && !typeHasCapability(S, QT)) { |
| 779 | S.Diag(AL.getLoc(), diag::warn_thread_attribute_decl_not_lockable) << AL; |
| 780 | return false; |
| 781 | } |
| 782 | |
| 783 | // Check that all arguments are lockable objects. |
| 784 | checkAttrArgsAreCapabilityObjs(S, D, AL, Args); |
| 785 | if (Args.empty()) |
| 786 | return false; |
| 787 | |
| 788 | return true; |
| 789 | } |
| 790 | |
| 791 | static void handleAcquiredAfterAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 792 | SmallVector<Expr *, 1> Args; |
| 793 | if (!checkAcquireOrderAttrCommon(S, D, AL, Args)) |
| 794 | return; |
| 795 | |
| 796 | Expr **StartArg = &Args[0]; |
| 797 | D->addAttr(::new (S.Context) AcquiredAfterAttr( |
| 798 | AL.getRange(), S.Context, StartArg, Args.size(), |
| 799 | AL.getAttributeSpellingListIndex())); |
| 800 | } |
| 801 | |
| 802 | static void handleAcquiredBeforeAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 803 | SmallVector<Expr *, 1> Args; |
| 804 | if (!checkAcquireOrderAttrCommon(S, D, AL, Args)) |
| 805 | return; |
| 806 | |
| 807 | Expr **StartArg = &Args[0]; |
| 808 | D->addAttr(::new (S.Context) AcquiredBeforeAttr( |
| 809 | AL.getRange(), S.Context, StartArg, Args.size(), |
| 810 | AL.getAttributeSpellingListIndex())); |
| 811 | } |
| 812 | |
| 813 | static bool checkLockFunAttrCommon(Sema &S, Decl *D, const ParsedAttr &AL, |
| 814 | SmallVectorImpl<Expr *> &Args) { |
| 815 | // zero or more arguments ok |
| 816 | // check that all arguments are lockable objects |
| 817 | checkAttrArgsAreCapabilityObjs(S, D, AL, Args, 0, /*ParamIdxOk=*/true); |
| 818 | |
| 819 | return true; |
| 820 | } |
| 821 | |
| 822 | static void handleAssertSharedLockAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 823 | SmallVector<Expr *, 1> Args; |
| 824 | if (!checkLockFunAttrCommon(S, D, AL, Args)) |
| 825 | return; |
| 826 | |
| 827 | unsigned Size = Args.size(); |
| 828 | Expr **StartArg = Size == 0 ? nullptr : &Args[0]; |
| 829 | D->addAttr(::new (S.Context) |
| 830 | AssertSharedLockAttr(AL.getRange(), S.Context, StartArg, Size, |
| 831 | AL.getAttributeSpellingListIndex())); |
| 832 | } |
| 833 | |
| 834 | static void handleAssertExclusiveLockAttr(Sema &S, Decl *D, |
| 835 | const ParsedAttr &AL) { |
| 836 | SmallVector<Expr *, 1> Args; |
| 837 | if (!checkLockFunAttrCommon(S, D, AL, Args)) |
| 838 | return; |
| 839 | |
| 840 | unsigned Size = Args.size(); |
| 841 | Expr **StartArg = Size == 0 ? nullptr : &Args[0]; |
| 842 | D->addAttr(::new (S.Context) AssertExclusiveLockAttr( |
| 843 | AL.getRange(), S.Context, StartArg, Size, |
| 844 | AL.getAttributeSpellingListIndex())); |
| 845 | } |
| 846 | |
| 847 | /// Checks to be sure that the given parameter number is in bounds, and |
| 848 | /// is an integral type. Will emit appropriate diagnostics if this returns |
| 849 | /// false. |
| 850 | /// |
| 851 | /// AttrArgNo is used to actually retrieve the argument, so it's base-0. |
| 852 | template <typename AttrInfo> |
| 853 | static bool checkParamIsIntegerType(Sema &S, const FunctionDecl *FD, |
| 854 | const AttrInfo &AI, unsigned AttrArgNo) { |
| 855 | assert(AI.isArgExpr(AttrArgNo) && "Expected expression argument")((AI.isArgExpr(AttrArgNo) && "Expected expression argument" ) ? static_cast<void> (0) : __assert_fail ("AI.isArgExpr(AttrArgNo) && \"Expected expression argument\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 855, __PRETTY_FUNCTION__)); |
| 856 | Expr *AttrArg = AI.getArgAsExpr(AttrArgNo); |
| 857 | ParamIdx Idx; |
| 858 | if (!checkFunctionOrMethodParameterIndex(S, FD, AI, AttrArgNo + 1, AttrArg, |
| 859 | Idx)) |
| 860 | return false; |
| 861 | |
| 862 | const ParmVarDecl *Param = FD->getParamDecl(Idx.getASTIndex()); |
| 863 | if (!Param->getType()->isIntegerType() && !Param->getType()->isCharType()) { |
| 864 | SourceLocation SrcLoc = AttrArg->getBeginLoc(); |
| 865 | S.Diag(SrcLoc, diag::err_attribute_integers_only) |
| 866 | << AI << Param->getSourceRange(); |
| 867 | return false; |
| 868 | } |
| 869 | return true; |
| 870 | } |
| 871 | |
| 872 | static void handleAllocSizeAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 873 | if (!checkAttributeAtLeastNumArgs(S, AL, 1) || |
| 874 | !checkAttributeAtMostNumArgs(S, AL, 2)) |
| 875 | return; |
| 876 | |
| 877 | const auto *FD = cast<FunctionDecl>(D); |
| 878 | if (!FD->getReturnType()->isPointerType()) { |
| 879 | S.Diag(AL.getLoc(), diag::warn_attribute_return_pointers_only) << AL; |
| 880 | return; |
| 881 | } |
| 882 | |
| 883 | const Expr *SizeExpr = AL.getArgAsExpr(0); |
| 884 | int SizeArgNoVal; |
| 885 | // Parameter indices are 1-indexed, hence Index=1 |
| 886 | if (!checkPositiveIntArgument(S, AL, SizeExpr, SizeArgNoVal, /*Index=*/1)) |
| 887 | return; |
| 888 | if (!checkParamIsIntegerType(S, FD, AL, /*AttrArgNo=*/0)) |
| 889 | return; |
| 890 | ParamIdx SizeArgNo(SizeArgNoVal, D); |
| 891 | |
| 892 | ParamIdx NumberArgNo; |
| 893 | if (AL.getNumArgs() == 2) { |
| 894 | const Expr *NumberExpr = AL.getArgAsExpr(1); |
| 895 | int Val; |
| 896 | // Parameter indices are 1-based, hence Index=2 |
| 897 | if (!checkPositiveIntArgument(S, AL, NumberExpr, Val, /*Index=*/2)) |
| 898 | return; |
| 899 | if (!checkParamIsIntegerType(S, FD, AL, /*AttrArgNo=*/1)) |
| 900 | return; |
| 901 | NumberArgNo = ParamIdx(Val, D); |
| 902 | } |
| 903 | |
| 904 | D->addAttr(::new (S.Context) |
| 905 | AllocSizeAttr(AL.getRange(), S.Context, SizeArgNo, NumberArgNo, |
| 906 | AL.getAttributeSpellingListIndex())); |
| 907 | } |
| 908 | |
| 909 | static bool checkTryLockFunAttrCommon(Sema &S, Decl *D, const ParsedAttr &AL, |
| 910 | SmallVectorImpl<Expr *> &Args) { |
| 911 | if (!checkAttributeAtLeastNumArgs(S, AL, 1)) |
| 912 | return false; |
| 913 | |
| 914 | if (!isIntOrBool(AL.getArgAsExpr(0))) { |
| 915 | S.Diag(AL.getLoc(), diag::err_attribute_argument_n_type) |
| 916 | << AL << 1 << AANT_ArgumentIntOrBool; |
| 917 | return false; |
| 918 | } |
| 919 | |
| 920 | // check that all arguments are lockable objects |
| 921 | checkAttrArgsAreCapabilityObjs(S, D, AL, Args, 1); |
| 922 | |
| 923 | return true; |
| 924 | } |
| 925 | |
| 926 | static void handleSharedTrylockFunctionAttr(Sema &S, Decl *D, |
| 927 | const ParsedAttr &AL) { |
| 928 | SmallVector<Expr*, 2> Args; |
| 929 | if (!checkTryLockFunAttrCommon(S, D, AL, Args)) |
| 930 | return; |
| 931 | |
| 932 | D->addAttr(::new (S.Context) SharedTrylockFunctionAttr( |
| 933 | AL.getRange(), S.Context, AL.getArgAsExpr(0), Args.data(), Args.size(), |
| 934 | AL.getAttributeSpellingListIndex())); |
| 935 | } |
| 936 | |
| 937 | static void handleExclusiveTrylockFunctionAttr(Sema &S, Decl *D, |
| 938 | const ParsedAttr &AL) { |
| 939 | SmallVector<Expr*, 2> Args; |
| 940 | if (!checkTryLockFunAttrCommon(S, D, AL, Args)) |
| 941 | return; |
| 942 | |
| 943 | D->addAttr(::new (S.Context) ExclusiveTrylockFunctionAttr( |
| 944 | AL.getRange(), S.Context, AL.getArgAsExpr(0), Args.data(), |
| 945 | Args.size(), AL.getAttributeSpellingListIndex())); |
| 946 | } |
| 947 | |
| 948 | static void handleLockReturnedAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 949 | // check that the argument is lockable object |
| 950 | SmallVector<Expr*, 1> Args; |
| 951 | checkAttrArgsAreCapabilityObjs(S, D, AL, Args); |
| 952 | unsigned Size = Args.size(); |
| 953 | if (Size == 0) |
| 954 | return; |
| 955 | |
| 956 | D->addAttr(::new (S.Context) |
| 957 | LockReturnedAttr(AL.getRange(), S.Context, Args[0], |
| 958 | AL.getAttributeSpellingListIndex())); |
| 959 | } |
| 960 | |
| 961 | static void handleLocksExcludedAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 962 | if (!checkAttributeAtLeastNumArgs(S, AL, 1)) |
| 963 | return; |
| 964 | |
| 965 | // check that all arguments are lockable objects |
| 966 | SmallVector<Expr*, 1> Args; |
| 967 | checkAttrArgsAreCapabilityObjs(S, D, AL, Args); |
| 968 | unsigned Size = Args.size(); |
| 969 | if (Size == 0) |
| 970 | return; |
| 971 | Expr **StartArg = &Args[0]; |
| 972 | |
| 973 | D->addAttr(::new (S.Context) |
| 974 | LocksExcludedAttr(AL.getRange(), S.Context, StartArg, Size, |
| 975 | AL.getAttributeSpellingListIndex())); |
| 976 | } |
| 977 | |
| 978 | static bool checkFunctionConditionAttr(Sema &S, Decl *D, const ParsedAttr &AL, |
| 979 | Expr *&Cond, StringRef &Msg) { |
| 980 | Cond = AL.getArgAsExpr(0); |
| 981 | if (!Cond->isTypeDependent()) { |
| 982 | ExprResult Converted = S.PerformContextuallyConvertToBool(Cond); |
| 983 | if (Converted.isInvalid()) |
| 984 | return false; |
| 985 | Cond = Converted.get(); |
| 986 | } |
| 987 | |
| 988 | if (!S.checkStringLiteralArgumentAttr(AL, 1, Msg)) |
| 989 | return false; |
| 990 | |
| 991 | if (Msg.empty()) |
| 992 | Msg = "<no message provided>"; |
| 993 | |
| 994 | SmallVector<PartialDiagnosticAt, 8> Diags; |
| 995 | if (isa<FunctionDecl>(D) && !Cond->isValueDependent() && |
| 996 | !Expr::isPotentialConstantExprUnevaluated(Cond, cast<FunctionDecl>(D), |
| 997 | Diags)) { |
| 998 | S.Diag(AL.getLoc(), diag::err_attr_cond_never_constant_expr) << AL; |
| 999 | for (const PartialDiagnosticAt &PDiag : Diags) |
| 1000 | S.Diag(PDiag.first, PDiag.second); |
| 1001 | return false; |
| 1002 | } |
| 1003 | return true; |
| 1004 | } |
| 1005 | |
| 1006 | static void handleEnableIfAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1007 | S.Diag(AL.getLoc(), diag::ext_clang_enable_if); |
| 1008 | |
| 1009 | Expr *Cond; |
| 1010 | StringRef Msg; |
| 1011 | if (checkFunctionConditionAttr(S, D, AL, Cond, Msg)) |
| 1012 | D->addAttr(::new (S.Context) |
| 1013 | EnableIfAttr(AL.getRange(), S.Context, Cond, Msg, |
| 1014 | AL.getAttributeSpellingListIndex())); |
| 1015 | } |
| 1016 | |
| 1017 | namespace { |
| 1018 | /// Determines if a given Expr references any of the given function's |
| 1019 | /// ParmVarDecls, or the function's implicit `this` parameter (if applicable). |
| 1020 | class ArgumentDependenceChecker |
| 1021 | : public RecursiveASTVisitor<ArgumentDependenceChecker> { |
| 1022 | #ifndef NDEBUG |
| 1023 | const CXXRecordDecl *ClassType; |
| 1024 | #endif |
| 1025 | llvm::SmallPtrSet<const ParmVarDecl *, 16> Parms; |
| 1026 | bool Result; |
| 1027 | |
| 1028 | public: |
| 1029 | ArgumentDependenceChecker(const FunctionDecl *FD) { |
| 1030 | #ifndef NDEBUG |
| 1031 | if (const auto *MD = dyn_cast<CXXMethodDecl>(FD)) |
| 1032 | ClassType = MD->getParent(); |
| 1033 | else |
| 1034 | ClassType = nullptr; |
| 1035 | #endif |
| 1036 | Parms.insert(FD->param_begin(), FD->param_end()); |
| 1037 | } |
| 1038 | |
| 1039 | bool referencesArgs(Expr *E) { |
| 1040 | Result = false; |
| 1041 | TraverseStmt(E); |
| 1042 | return Result; |
| 1043 | } |
| 1044 | |
| 1045 | bool VisitCXXThisExpr(CXXThisExpr *E) { |
| 1046 | assert(E->getType()->getPointeeCXXRecordDecl() == ClassType &&((E->getType()->getPointeeCXXRecordDecl() == ClassType && "`this` doesn't refer to the enclosing class?") ? static_cast <void> (0) : __assert_fail ("E->getType()->getPointeeCXXRecordDecl() == ClassType && \"`this` doesn't refer to the enclosing class?\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 1047, __PRETTY_FUNCTION__)) |
| 1047 | "`this` doesn't refer to the enclosing class?")((E->getType()->getPointeeCXXRecordDecl() == ClassType && "`this` doesn't refer to the enclosing class?") ? static_cast <void> (0) : __assert_fail ("E->getType()->getPointeeCXXRecordDecl() == ClassType && \"`this` doesn't refer to the enclosing class?\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 1047, __PRETTY_FUNCTION__)); |
| 1048 | Result = true; |
| 1049 | return false; |
| 1050 | } |
| 1051 | |
| 1052 | bool VisitDeclRefExpr(DeclRefExpr *DRE) { |
| 1053 | if (const auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl())) |
| 1054 | if (Parms.count(PVD)) { |
| 1055 | Result = true; |
| 1056 | return false; |
| 1057 | } |
| 1058 | return true; |
| 1059 | } |
| 1060 | }; |
| 1061 | } |
| 1062 | |
| 1063 | static void handleDiagnoseIfAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1064 | S.Diag(AL.getLoc(), diag::ext_clang_diagnose_if); |
| 1065 | |
| 1066 | Expr *Cond; |
| 1067 | StringRef Msg; |
| 1068 | if (!checkFunctionConditionAttr(S, D, AL, Cond, Msg)) |
| 1069 | return; |
| 1070 | |
| 1071 | StringRef DiagTypeStr; |
| 1072 | if (!S.checkStringLiteralArgumentAttr(AL, 2, DiagTypeStr)) |
| 1073 | return; |
| 1074 | |
| 1075 | DiagnoseIfAttr::DiagnosticType DiagType; |
| 1076 | if (!DiagnoseIfAttr::ConvertStrToDiagnosticType(DiagTypeStr, DiagType)) { |
| 1077 | S.Diag(AL.getArgAsExpr(2)->getBeginLoc(), |
| 1078 | diag::err_diagnose_if_invalid_diagnostic_type); |
| 1079 | return; |
| 1080 | } |
| 1081 | |
| 1082 | bool ArgDependent = false; |
| 1083 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) |
| 1084 | ArgDependent = ArgumentDependenceChecker(FD).referencesArgs(Cond); |
| 1085 | D->addAttr(::new (S.Context) DiagnoseIfAttr( |
| 1086 | AL.getRange(), S.Context, Cond, Msg, DiagType, ArgDependent, |
| 1087 | cast<NamedDecl>(D), AL.getAttributeSpellingListIndex())); |
| 1088 | } |
| 1089 | |
| 1090 | static void handlePassObjectSizeAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1091 | if (D->hasAttr<PassObjectSizeAttr>()) { |
| 1092 | S.Diag(D->getBeginLoc(), diag::err_attribute_only_once_per_parameter) << AL; |
| 1093 | return; |
| 1094 | } |
| 1095 | |
| 1096 | Expr *E = AL.getArgAsExpr(0); |
| 1097 | uint32_t Type; |
| 1098 | if (!checkUInt32Argument(S, AL, E, Type, /*Idx=*/1)) |
| 1099 | return; |
| 1100 | |
| 1101 | // pass_object_size's argument is passed in as the second argument of |
| 1102 | // __builtin_object_size. So, it has the same constraints as that second |
| 1103 | // argument; namely, it must be in the range [0, 3]. |
| 1104 | if (Type > 3) { |
| 1105 | S.Diag(E->getBeginLoc(), diag::err_attribute_argument_outof_range) |
| 1106 | << AL << 0 << 3 << E->getSourceRange(); |
| 1107 | return; |
| 1108 | } |
| 1109 | |
| 1110 | // pass_object_size is only supported on constant pointer parameters; as a |
| 1111 | // kindness to users, we allow the parameter to be non-const for declarations. |
| 1112 | // At this point, we have no clue if `D` belongs to a function declaration or |
| 1113 | // definition, so we defer the constness check until later. |
| 1114 | if (!cast<ParmVarDecl>(D)->getType()->isPointerType()) { |
| 1115 | S.Diag(D->getBeginLoc(), diag::err_attribute_pointers_only) << AL << 1; |
| 1116 | return; |
| 1117 | } |
| 1118 | |
| 1119 | D->addAttr(::new (S.Context) PassObjectSizeAttr( |
| 1120 | AL.getRange(), S.Context, (int)Type, AL.getAttributeSpellingListIndex())); |
| 1121 | } |
| 1122 | |
| 1123 | static void handleConsumableAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1124 | ConsumableAttr::ConsumedState DefaultState; |
| 1125 | |
| 1126 | if (AL.isArgIdent(0)) { |
| 1127 | IdentifierLoc *IL = AL.getArgAsIdent(0); |
| 1128 | if (!ConsumableAttr::ConvertStrToConsumedState(IL->Ident->getName(), |
| 1129 | DefaultState)) { |
| 1130 | S.Diag(IL->Loc, diag::warn_attribute_type_not_supported) << AL |
| 1131 | << IL->Ident; |
| 1132 | return; |
| 1133 | } |
| 1134 | } else { |
| 1135 | S.Diag(AL.getLoc(), diag::err_attribute_argument_type) |
| 1136 | << AL << AANT_ArgumentIdentifier; |
| 1137 | return; |
| 1138 | } |
| 1139 | |
| 1140 | D->addAttr(::new (S.Context) |
| 1141 | ConsumableAttr(AL.getRange(), S.Context, DefaultState, |
| 1142 | AL.getAttributeSpellingListIndex())); |
| 1143 | } |
| 1144 | |
| 1145 | static bool checkForConsumableClass(Sema &S, const CXXMethodDecl *MD, |
| 1146 | const ParsedAttr &AL) { |
| 1147 | ASTContext &CurrContext = S.getASTContext(); |
| 1148 | QualType ThisType = MD->getThisType(CurrContext)->getPointeeType(); |
| 1149 | |
| 1150 | if (const CXXRecordDecl *RD = ThisType->getAsCXXRecordDecl()) { |
| 1151 | if (!RD->hasAttr<ConsumableAttr>()) { |
| 1152 | S.Diag(AL.getLoc(), diag::warn_attr_on_unconsumable_class) << |
| 1153 | RD->getNameAsString(); |
| 1154 | |
| 1155 | return false; |
| 1156 | } |
| 1157 | } |
| 1158 | |
| 1159 | return true; |
| 1160 | } |
| 1161 | |
| 1162 | static void handleCallableWhenAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1163 | if (!checkAttributeAtLeastNumArgs(S, AL, 1)) |
| 1164 | return; |
| 1165 | |
| 1166 | if (!checkForConsumableClass(S, cast<CXXMethodDecl>(D), AL)) |
| 1167 | return; |
| 1168 | |
| 1169 | SmallVector<CallableWhenAttr::ConsumedState, 3> States; |
| 1170 | for (unsigned ArgIndex = 0; ArgIndex < AL.getNumArgs(); ++ArgIndex) { |
| 1171 | CallableWhenAttr::ConsumedState CallableState; |
| 1172 | |
| 1173 | StringRef StateString; |
| 1174 | SourceLocation Loc; |
| 1175 | if (AL.isArgIdent(ArgIndex)) { |
| 1176 | IdentifierLoc *Ident = AL.getArgAsIdent(ArgIndex); |
| 1177 | StateString = Ident->Ident->getName(); |
| 1178 | Loc = Ident->Loc; |
| 1179 | } else { |
| 1180 | if (!S.checkStringLiteralArgumentAttr(AL, ArgIndex, StateString, &Loc)) |
| 1181 | return; |
| 1182 | } |
| 1183 | |
| 1184 | if (!CallableWhenAttr::ConvertStrToConsumedState(StateString, |
| 1185 | CallableState)) { |
| 1186 | S.Diag(Loc, diag::warn_attribute_type_not_supported) << AL << StateString; |
| 1187 | return; |
| 1188 | } |
| 1189 | |
| 1190 | States.push_back(CallableState); |
| 1191 | } |
| 1192 | |
| 1193 | D->addAttr(::new (S.Context) |
| 1194 | CallableWhenAttr(AL.getRange(), S.Context, States.data(), |
| 1195 | States.size(), AL.getAttributeSpellingListIndex())); |
| 1196 | } |
| 1197 | |
| 1198 | static void handleParamTypestateAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1199 | ParamTypestateAttr::ConsumedState ParamState; |
| 1200 | |
| 1201 | if (AL.isArgIdent(0)) { |
| 1202 | IdentifierLoc *Ident = AL.getArgAsIdent(0); |
| 1203 | StringRef StateString = Ident->Ident->getName(); |
| 1204 | |
| 1205 | if (!ParamTypestateAttr::ConvertStrToConsumedState(StateString, |
| 1206 | ParamState)) { |
| 1207 | S.Diag(Ident->Loc, diag::warn_attribute_type_not_supported) |
| 1208 | << AL << StateString; |
| 1209 | return; |
| 1210 | } |
| 1211 | } else { |
| 1212 | S.Diag(AL.getLoc(), diag::err_attribute_argument_type) |
| 1213 | << AL << AANT_ArgumentIdentifier; |
| 1214 | return; |
| 1215 | } |
| 1216 | |
| 1217 | // FIXME: This check is currently being done in the analysis. It can be |
| 1218 | // enabled here only after the parser propagates attributes at |
| 1219 | // template specialization definition, not declaration. |
| 1220 | //QualType ReturnType = cast<ParmVarDecl>(D)->getType(); |
| 1221 | //const CXXRecordDecl *RD = ReturnType->getAsCXXRecordDecl(); |
| 1222 | // |
| 1223 | //if (!RD || !RD->hasAttr<ConsumableAttr>()) { |
| 1224 | // S.Diag(AL.getLoc(), diag::warn_return_state_for_unconsumable_type) << |
| 1225 | // ReturnType.getAsString(); |
| 1226 | // return; |
| 1227 | //} |
| 1228 | |
| 1229 | D->addAttr(::new (S.Context) |
| 1230 | ParamTypestateAttr(AL.getRange(), S.Context, ParamState, |
| 1231 | AL.getAttributeSpellingListIndex())); |
| 1232 | } |
| 1233 | |
| 1234 | static void handleReturnTypestateAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1235 | ReturnTypestateAttr::ConsumedState ReturnState; |
| 1236 | |
| 1237 | if (AL.isArgIdent(0)) { |
| 1238 | IdentifierLoc *IL = AL.getArgAsIdent(0); |
| 1239 | if (!ReturnTypestateAttr::ConvertStrToConsumedState(IL->Ident->getName(), |
| 1240 | ReturnState)) { |
| 1241 | S.Diag(IL->Loc, diag::warn_attribute_type_not_supported) << AL |
| 1242 | << IL->Ident; |
| 1243 | return; |
| 1244 | } |
| 1245 | } else { |
| 1246 | S.Diag(AL.getLoc(), diag::err_attribute_argument_type) |
| 1247 | << AL << AANT_ArgumentIdentifier; |
| 1248 | return; |
| 1249 | } |
| 1250 | |
| 1251 | // FIXME: This check is currently being done in the analysis. It can be |
| 1252 | // enabled here only after the parser propagates attributes at |
| 1253 | // template specialization definition, not declaration. |
| 1254 | //QualType ReturnType; |
| 1255 | // |
| 1256 | //if (const ParmVarDecl *Param = dyn_cast<ParmVarDecl>(D)) { |
| 1257 | // ReturnType = Param->getType(); |
| 1258 | // |
| 1259 | //} else if (const CXXConstructorDecl *Constructor = |
| 1260 | // dyn_cast<CXXConstructorDecl>(D)) { |
| 1261 | // ReturnType = Constructor->getThisType(S.getASTContext())->getPointeeType(); |
| 1262 | // |
| 1263 | //} else { |
| 1264 | // |
| 1265 | // ReturnType = cast<FunctionDecl>(D)->getCallResultType(); |
| 1266 | //} |
| 1267 | // |
| 1268 | //const CXXRecordDecl *RD = ReturnType->getAsCXXRecordDecl(); |
| 1269 | // |
| 1270 | //if (!RD || !RD->hasAttr<ConsumableAttr>()) { |
| 1271 | // S.Diag(Attr.getLoc(), diag::warn_return_state_for_unconsumable_type) << |
| 1272 | // ReturnType.getAsString(); |
| 1273 | // return; |
| 1274 | //} |
| 1275 | |
| 1276 | D->addAttr(::new (S.Context) |
| 1277 | ReturnTypestateAttr(AL.getRange(), S.Context, ReturnState, |
| 1278 | AL.getAttributeSpellingListIndex())); |
| 1279 | } |
| 1280 | |
| 1281 | static void handleSetTypestateAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1282 | if (!checkForConsumableClass(S, cast<CXXMethodDecl>(D), AL)) |
| 1283 | return; |
| 1284 | |
| 1285 | SetTypestateAttr::ConsumedState NewState; |
| 1286 | if (AL.isArgIdent(0)) { |
| 1287 | IdentifierLoc *Ident = AL.getArgAsIdent(0); |
| 1288 | StringRef Param = Ident->Ident->getName(); |
| 1289 | if (!SetTypestateAttr::ConvertStrToConsumedState(Param, NewState)) { |
| 1290 | S.Diag(Ident->Loc, diag::warn_attribute_type_not_supported) << AL |
| 1291 | << Param; |
| 1292 | return; |
| 1293 | } |
| 1294 | } else { |
| 1295 | S.Diag(AL.getLoc(), diag::err_attribute_argument_type) |
| 1296 | << AL << AANT_ArgumentIdentifier; |
| 1297 | return; |
| 1298 | } |
| 1299 | |
| 1300 | D->addAttr(::new (S.Context) |
| 1301 | SetTypestateAttr(AL.getRange(), S.Context, NewState, |
| 1302 | AL.getAttributeSpellingListIndex())); |
| 1303 | } |
| 1304 | |
| 1305 | static void handleTestTypestateAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1306 | if (!checkForConsumableClass(S, cast<CXXMethodDecl>(D), AL)) |
| 1307 | return; |
| 1308 | |
| 1309 | TestTypestateAttr::ConsumedState TestState; |
| 1310 | if (AL.isArgIdent(0)) { |
| 1311 | IdentifierLoc *Ident = AL.getArgAsIdent(0); |
| 1312 | StringRef Param = Ident->Ident->getName(); |
| 1313 | if (!TestTypestateAttr::ConvertStrToConsumedState(Param, TestState)) { |
| 1314 | S.Diag(Ident->Loc, diag::warn_attribute_type_not_supported) << AL |
| 1315 | << Param; |
| 1316 | return; |
| 1317 | } |
| 1318 | } else { |
| 1319 | S.Diag(AL.getLoc(), diag::err_attribute_argument_type) |
| 1320 | << AL << AANT_ArgumentIdentifier; |
| 1321 | return; |
| 1322 | } |
| 1323 | |
| 1324 | D->addAttr(::new (S.Context) |
| 1325 | TestTypestateAttr(AL.getRange(), S.Context, TestState, |
| 1326 | AL.getAttributeSpellingListIndex())); |
| 1327 | } |
| 1328 | |
| 1329 | static void handleExtVectorTypeAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1330 | // Remember this typedef decl, we will need it later for diagnostics. |
| 1331 | S.ExtVectorDecls.push_back(cast<TypedefNameDecl>(D)); |
| 1332 | } |
| 1333 | |
| 1334 | static void handlePackedAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1335 | if (auto *TD = dyn_cast<TagDecl>(D)) |
| 1336 | TD->addAttr(::new (S.Context) PackedAttr(AL.getRange(), S.Context, |
| 1337 | AL.getAttributeSpellingListIndex())); |
| 1338 | else if (auto *FD = dyn_cast<FieldDecl>(D)) { |
| 1339 | bool BitfieldByteAligned = (!FD->getType()->isDependentType() && |
| 1340 | !FD->getType()->isIncompleteType() && |
| 1341 | FD->isBitField() && |
| 1342 | S.Context.getTypeAlign(FD->getType()) <= 8); |
| 1343 | |
| 1344 | if (S.getASTContext().getTargetInfo().getTriple().isPS4()) { |
| 1345 | if (BitfieldByteAligned) |
| 1346 | // The PS4 target needs to maintain ABI backwards compatibility. |
| 1347 | S.Diag(AL.getLoc(), diag::warn_attribute_ignored_for_field_of_type) |
| 1348 | << AL << FD->getType(); |
| 1349 | else |
| 1350 | FD->addAttr(::new (S.Context) PackedAttr( |
| 1351 | AL.getRange(), S.Context, AL.getAttributeSpellingListIndex())); |
| 1352 | } else { |
| 1353 | // Report warning about changed offset in the newer compiler versions. |
| 1354 | if (BitfieldByteAligned) |
| 1355 | S.Diag(AL.getLoc(), diag::warn_attribute_packed_for_bitfield); |
| 1356 | |
| 1357 | FD->addAttr(::new (S.Context) PackedAttr( |
| 1358 | AL.getRange(), S.Context, AL.getAttributeSpellingListIndex())); |
| 1359 | } |
| 1360 | |
| 1361 | } else |
| 1362 | S.Diag(AL.getLoc(), diag::warn_attribute_ignored) << AL; |
| 1363 | } |
| 1364 | |
| 1365 | static bool checkIBOutletCommon(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1366 | // The IBOutlet/IBOutletCollection attributes only apply to instance |
| 1367 | // variables or properties of Objective-C classes. The outlet must also |
| 1368 | // have an object reference type. |
| 1369 | if (const auto *VD = dyn_cast<ObjCIvarDecl>(D)) { |
| 1370 | if (!VD->getType()->getAs<ObjCObjectPointerType>()) { |
| 1371 | S.Diag(AL.getLoc(), diag::warn_iboutlet_object_type) |
| 1372 | << AL << VD->getType() << 0; |
| 1373 | return false; |
| 1374 | } |
| 1375 | } |
| 1376 | else if (const auto *PD = dyn_cast<ObjCPropertyDecl>(D)) { |
| 1377 | if (!PD->getType()->getAs<ObjCObjectPointerType>()) { |
| 1378 | S.Diag(AL.getLoc(), diag::warn_iboutlet_object_type) |
| 1379 | << AL << PD->getType() << 1; |
| 1380 | return false; |
| 1381 | } |
| 1382 | } |
| 1383 | else { |
| 1384 | S.Diag(AL.getLoc(), diag::warn_attribute_iboutlet) << AL; |
| 1385 | return false; |
| 1386 | } |
| 1387 | |
| 1388 | return true; |
| 1389 | } |
| 1390 | |
| 1391 | static void handleIBOutlet(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1392 | if (!checkIBOutletCommon(S, D, AL)) |
| 1393 | return; |
| 1394 | |
| 1395 | D->addAttr(::new (S.Context) |
| 1396 | IBOutletAttr(AL.getRange(), S.Context, |
| 1397 | AL.getAttributeSpellingListIndex())); |
| 1398 | } |
| 1399 | |
| 1400 | static void handleIBOutletCollection(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1401 | |
| 1402 | // The iboutletcollection attribute can have zero or one arguments. |
| 1403 | if (AL.getNumArgs() > 1) { |
| 1404 | S.Diag(AL.getLoc(), diag::err_attribute_wrong_number_arguments) << AL << 1; |
| 1405 | return; |
| 1406 | } |
| 1407 | |
| 1408 | if (!checkIBOutletCommon(S, D, AL)) |
| 1409 | return; |
| 1410 | |
| 1411 | ParsedType PT; |
| 1412 | |
| 1413 | if (AL.hasParsedType()) |
| 1414 | PT = AL.getTypeArg(); |
| 1415 | else { |
| 1416 | PT = S.getTypeName(S.Context.Idents.get("NSObject"), AL.getLoc(), |
| 1417 | S.getScopeForContext(D->getDeclContext()->getParent())); |
| 1418 | if (!PT) { |
| 1419 | S.Diag(AL.getLoc(), diag::err_iboutletcollection_type) << "NSObject"; |
| 1420 | return; |
| 1421 | } |
| 1422 | } |
| 1423 | |
| 1424 | TypeSourceInfo *QTLoc = nullptr; |
| 1425 | QualType QT = S.GetTypeFromParser(PT, &QTLoc); |
| 1426 | if (!QTLoc) |
| 1427 | QTLoc = S.Context.getTrivialTypeSourceInfo(QT, AL.getLoc()); |
| 1428 | |
| 1429 | // Diagnose use of non-object type in iboutletcollection attribute. |
| 1430 | // FIXME. Gnu attribute extension ignores use of builtin types in |
| 1431 | // attributes. So, __attribute__((iboutletcollection(char))) will be |
| 1432 | // treated as __attribute__((iboutletcollection())). |
| 1433 | if (!QT->isObjCIdType() && !QT->isObjCObjectType()) { |
| 1434 | S.Diag(AL.getLoc(), |
| 1435 | QT->isBuiltinType() ? diag::err_iboutletcollection_builtintype |
| 1436 | : diag::err_iboutletcollection_type) << QT; |
| 1437 | return; |
| 1438 | } |
| 1439 | |
| 1440 | D->addAttr(::new (S.Context) |
| 1441 | IBOutletCollectionAttr(AL.getRange(), S.Context, QTLoc, |
| 1442 | AL.getAttributeSpellingListIndex())); |
| 1443 | } |
| 1444 | |
| 1445 | bool Sema::isValidPointerAttrType(QualType T, bool RefOkay) { |
| 1446 | if (RefOkay) { |
| 1447 | if (T->isReferenceType()) |
| 1448 | return true; |
| 1449 | } else { |
| 1450 | T = T.getNonReferenceType(); |
| 1451 | } |
| 1452 | |
| 1453 | // The nonnull attribute, and other similar attributes, can be applied to a |
| 1454 | // transparent union that contains a pointer type. |
| 1455 | if (const RecordType *UT = T->getAsUnionType()) { |
| 1456 | if (UT && UT->getDecl()->hasAttr<TransparentUnionAttr>()) { |
| 1457 | RecordDecl *UD = UT->getDecl(); |
| 1458 | for (const auto *I : UD->fields()) { |
| 1459 | QualType QT = I->getType(); |
| 1460 | if (QT->isAnyPointerType() || QT->isBlockPointerType()) |
| 1461 | return true; |
| 1462 | } |
| 1463 | } |
| 1464 | } |
| 1465 | |
| 1466 | return T->isAnyPointerType() || T->isBlockPointerType(); |
| 1467 | } |
| 1468 | |
| 1469 | static bool attrNonNullArgCheck(Sema &S, QualType T, const ParsedAttr &AL, |
| 1470 | SourceRange AttrParmRange, |
| 1471 | SourceRange TypeRange, |
| 1472 | bool isReturnValue = false) { |
| 1473 | if (!S.isValidPointerAttrType(T)) { |
| 1474 | if (isReturnValue) |
| 1475 | S.Diag(AL.getLoc(), diag::warn_attribute_return_pointers_only) |
| 1476 | << AL << AttrParmRange << TypeRange; |
| 1477 | else |
| 1478 | S.Diag(AL.getLoc(), diag::warn_attribute_pointers_only) |
| 1479 | << AL << AttrParmRange << TypeRange << 0; |
| 1480 | return false; |
| 1481 | } |
| 1482 | return true; |
| 1483 | } |
| 1484 | |
| 1485 | static void handleNonNullAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1486 | SmallVector<ParamIdx, 8> NonNullArgs; |
| 1487 | for (unsigned I = 0; I < AL.getNumArgs(); ++I) { |
| 1488 | Expr *Ex = AL.getArgAsExpr(I); |
| 1489 | ParamIdx Idx; |
| 1490 | if (!checkFunctionOrMethodParameterIndex(S, D, AL, I + 1, Ex, Idx)) |
| 1491 | return; |
| 1492 | |
| 1493 | // Is the function argument a pointer type? |
| 1494 | if (Idx.getASTIndex() < getFunctionOrMethodNumParams(D) && |
| 1495 | !attrNonNullArgCheck( |
| 1496 | S, getFunctionOrMethodParamType(D, Idx.getASTIndex()), AL, |
| 1497 | Ex->getSourceRange(), |
| 1498 | getFunctionOrMethodParamRange(D, Idx.getASTIndex()))) |
| 1499 | continue; |
| 1500 | |
| 1501 | NonNullArgs.push_back(Idx); |
| 1502 | } |
| 1503 | |
| 1504 | // If no arguments were specified to __attribute__((nonnull)) then all pointer |
| 1505 | // arguments have a nonnull attribute; warn if there aren't any. Skip this |
| 1506 | // check if the attribute came from a macro expansion or a template |
| 1507 | // instantiation. |
| 1508 | if (NonNullArgs.empty() && AL.getLoc().isFileID() && |
| 1509 | !S.inTemplateInstantiation()) { |
| 1510 | bool AnyPointers = isFunctionOrMethodVariadic(D); |
| 1511 | for (unsigned I = 0, E = getFunctionOrMethodNumParams(D); |
| 1512 | I != E && !AnyPointers; ++I) { |
| 1513 | QualType T = getFunctionOrMethodParamType(D, I); |
| 1514 | if (T->isDependentType() || S.isValidPointerAttrType(T)) |
| 1515 | AnyPointers = true; |
| 1516 | } |
| 1517 | |
| 1518 | if (!AnyPointers) |
| 1519 | S.Diag(AL.getLoc(), diag::warn_attribute_nonnull_no_pointers); |
| 1520 | } |
| 1521 | |
| 1522 | ParamIdx *Start = NonNullArgs.data(); |
| 1523 | unsigned Size = NonNullArgs.size(); |
| 1524 | llvm::array_pod_sort(Start, Start + Size); |
| 1525 | D->addAttr(::new (S.Context) |
| 1526 | NonNullAttr(AL.getRange(), S.Context, Start, Size, |
| 1527 | AL.getAttributeSpellingListIndex())); |
| 1528 | } |
| 1529 | |
| 1530 | static void handleNonNullAttrParameter(Sema &S, ParmVarDecl *D, |
| 1531 | const ParsedAttr &AL) { |
| 1532 | if (AL.getNumArgs() > 0) { |
| 1533 | if (D->getFunctionType()) { |
| 1534 | handleNonNullAttr(S, D, AL); |
| 1535 | } else { |
| 1536 | S.Diag(AL.getLoc(), diag::warn_attribute_nonnull_parm_no_args) |
| 1537 | << D->getSourceRange(); |
| 1538 | } |
| 1539 | return; |
| 1540 | } |
| 1541 | |
| 1542 | // Is the argument a pointer type? |
| 1543 | if (!attrNonNullArgCheck(S, D->getType(), AL, SourceRange(), |
| 1544 | D->getSourceRange())) |
| 1545 | return; |
| 1546 | |
| 1547 | D->addAttr(::new (S.Context) |
| 1548 | NonNullAttr(AL.getRange(), S.Context, nullptr, 0, |
| 1549 | AL.getAttributeSpellingListIndex())); |
| 1550 | } |
| 1551 | |
| 1552 | static void handleReturnsNonNullAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1553 | QualType ResultType = getFunctionOrMethodResultType(D); |
| 1554 | SourceRange SR = getFunctionOrMethodResultSourceRange(D); |
| 1555 | if (!attrNonNullArgCheck(S, ResultType, AL, SourceRange(), SR, |
| 1556 | /* isReturnValue */ true)) |
| 1557 | return; |
| 1558 | |
| 1559 | D->addAttr(::new (S.Context) |
| 1560 | ReturnsNonNullAttr(AL.getRange(), S.Context, |
| 1561 | AL.getAttributeSpellingListIndex())); |
| 1562 | } |
| 1563 | |
| 1564 | static void handleNoEscapeAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1565 | if (D->isInvalidDecl()) |
| 1566 | return; |
| 1567 | |
| 1568 | // noescape only applies to pointer types. |
| 1569 | QualType T = cast<ParmVarDecl>(D)->getType(); |
| 1570 | if (!S.isValidPointerAttrType(T, /* RefOkay */ true)) { |
| 1571 | S.Diag(AL.getLoc(), diag::warn_attribute_pointers_only) |
| 1572 | << AL << AL.getRange() << 0; |
| 1573 | return; |
| 1574 | } |
| 1575 | |
| 1576 | D->addAttr(::new (S.Context) NoEscapeAttr( |
| 1577 | AL.getRange(), S.Context, AL.getAttributeSpellingListIndex())); |
| 1578 | } |
| 1579 | |
| 1580 | static void handleAssumeAlignedAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1581 | Expr *E = AL.getArgAsExpr(0), |
| 1582 | *OE = AL.getNumArgs() > 1 ? AL.getArgAsExpr(1) : nullptr; |
| 1583 | S.AddAssumeAlignedAttr(AL.getRange(), D, E, OE, |
| 1584 | AL.getAttributeSpellingListIndex()); |
| 1585 | } |
| 1586 | |
| 1587 | static void handleAllocAlignAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1588 | S.AddAllocAlignAttr(AL.getRange(), D, AL.getArgAsExpr(0), |
| 1589 | AL.getAttributeSpellingListIndex()); |
| 1590 | } |
| 1591 | |
| 1592 | void Sema::AddAssumeAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E, |
| 1593 | Expr *OE, unsigned SpellingListIndex) { |
| 1594 | QualType ResultType = getFunctionOrMethodResultType(D); |
| 1595 | SourceRange SR = getFunctionOrMethodResultSourceRange(D); |
| 1596 | |
| 1597 | AssumeAlignedAttr TmpAttr(AttrRange, Context, E, OE, SpellingListIndex); |
| 1598 | SourceLocation AttrLoc = AttrRange.getBegin(); |
| 1599 | |
| 1600 | if (!isValidPointerAttrType(ResultType, /* RefOkay */ true)) { |
| 1601 | Diag(AttrLoc, diag::warn_attribute_return_pointers_refs_only) |
| 1602 | << &TmpAttr << AttrRange << SR; |
| 1603 | return; |
| 1604 | } |
| 1605 | |
| 1606 | if (!E->isValueDependent()) { |
| 1607 | llvm::APSInt I(64); |
| 1608 | if (!E->isIntegerConstantExpr(I, Context)) { |
| 1609 | if (OE) |
| 1610 | Diag(AttrLoc, diag::err_attribute_argument_n_type) |
| 1611 | << &TmpAttr << 1 << AANT_ArgumentIntegerConstant |
| 1612 | << E->getSourceRange(); |
| 1613 | else |
| 1614 | Diag(AttrLoc, diag::err_attribute_argument_type) |
| 1615 | << &TmpAttr << AANT_ArgumentIntegerConstant |
| 1616 | << E->getSourceRange(); |
| 1617 | return; |
| 1618 | } |
| 1619 | |
| 1620 | if (!I.isPowerOf2()) { |
| 1621 | Diag(AttrLoc, diag::err_alignment_not_power_of_two) |
| 1622 | << E->getSourceRange(); |
| 1623 | return; |
| 1624 | } |
| 1625 | } |
| 1626 | |
| 1627 | if (OE) { |
| 1628 | if (!OE->isValueDependent()) { |
| 1629 | llvm::APSInt I(64); |
| 1630 | if (!OE->isIntegerConstantExpr(I, Context)) { |
| 1631 | Diag(AttrLoc, diag::err_attribute_argument_n_type) |
| 1632 | << &TmpAttr << 2 << AANT_ArgumentIntegerConstant |
| 1633 | << OE->getSourceRange(); |
| 1634 | return; |
| 1635 | } |
| 1636 | } |
| 1637 | } |
| 1638 | |
| 1639 | D->addAttr(::new (Context) |
| 1640 | AssumeAlignedAttr(AttrRange, Context, E, OE, SpellingListIndex)); |
| 1641 | } |
| 1642 | |
| 1643 | void Sema::AddAllocAlignAttr(SourceRange AttrRange, Decl *D, Expr *ParamExpr, |
| 1644 | unsigned SpellingListIndex) { |
| 1645 | QualType ResultType = getFunctionOrMethodResultType(D); |
| 1646 | |
| 1647 | AllocAlignAttr TmpAttr(AttrRange, Context, ParamIdx(), SpellingListIndex); |
| 1648 | SourceLocation AttrLoc = AttrRange.getBegin(); |
| 1649 | |
| 1650 | if (!ResultType->isDependentType() && |
| 1651 | !isValidPointerAttrType(ResultType, /* RefOkay */ true)) { |
| 1652 | Diag(AttrLoc, diag::warn_attribute_return_pointers_refs_only) |
| 1653 | << &TmpAttr << AttrRange << getFunctionOrMethodResultSourceRange(D); |
| 1654 | return; |
| 1655 | } |
| 1656 | |
| 1657 | ParamIdx Idx; |
| 1658 | const auto *FuncDecl = cast<FunctionDecl>(D); |
| 1659 | if (!checkFunctionOrMethodParameterIndex(*this, FuncDecl, TmpAttr, |
| 1660 | /*AttrArgNo=*/1, ParamExpr, Idx)) |
| 1661 | return; |
| 1662 | |
| 1663 | QualType Ty = getFunctionOrMethodParamType(D, Idx.getASTIndex()); |
| 1664 | if (!Ty->isDependentType() && !Ty->isIntegralType(Context)) { |
| 1665 | Diag(ParamExpr->getBeginLoc(), diag::err_attribute_integers_only) |
| 1666 | << &TmpAttr |
| 1667 | << FuncDecl->getParamDecl(Idx.getASTIndex())->getSourceRange(); |
| 1668 | return; |
| 1669 | } |
| 1670 | |
| 1671 | D->addAttr(::new (Context) |
| 1672 | AllocAlignAttr(AttrRange, Context, Idx, SpellingListIndex)); |
| 1673 | } |
| 1674 | |
| 1675 | /// Normalize the attribute, __foo__ becomes foo. |
| 1676 | /// Returns true if normalization was applied. |
| 1677 | static bool normalizeName(StringRef &AttrName) { |
| 1678 | if (AttrName.size() > 4 && AttrName.startswith("__") && |
| 1679 | AttrName.endswith("__")) { |
| 1680 | AttrName = AttrName.drop_front(2).drop_back(2); |
| 1681 | return true; |
| 1682 | } |
| 1683 | return false; |
| 1684 | } |
| 1685 | |
| 1686 | static void handleOwnershipAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1687 | // This attribute must be applied to a function declaration. The first |
| 1688 | // argument to the attribute must be an identifier, the name of the resource, |
| 1689 | // for example: malloc. The following arguments must be argument indexes, the |
| 1690 | // arguments must be of integer type for Returns, otherwise of pointer type. |
| 1691 | // The difference between Holds and Takes is that a pointer may still be used |
| 1692 | // after being held. free() should be __attribute((ownership_takes)), whereas |
| 1693 | // a list append function may well be __attribute((ownership_holds)). |
| 1694 | |
| 1695 | if (!AL.isArgIdent(0)) { |
| 1696 | S.Diag(AL.getLoc(), diag::err_attribute_argument_n_type) |
| 1697 | << AL << 1 << AANT_ArgumentIdentifier; |
| 1698 | return; |
| 1699 | } |
| 1700 | |
| 1701 | // Figure out our Kind. |
| 1702 | OwnershipAttr::OwnershipKind K = |
| 1703 | OwnershipAttr(AL.getLoc(), S.Context, nullptr, nullptr, 0, |
| 1704 | AL.getAttributeSpellingListIndex()).getOwnKind(); |
| 1705 | |
| 1706 | // Check arguments. |
| 1707 | switch (K) { |
| 1708 | case OwnershipAttr::Takes: |
| 1709 | case OwnershipAttr::Holds: |
| 1710 | if (AL.getNumArgs() < 2) { |
| 1711 | S.Diag(AL.getLoc(), diag::err_attribute_too_few_arguments) << AL << 2; |
| 1712 | return; |
| 1713 | } |
| 1714 | break; |
| 1715 | case OwnershipAttr::Returns: |
| 1716 | if (AL.getNumArgs() > 2) { |
| 1717 | S.Diag(AL.getLoc(), diag::err_attribute_too_many_arguments) << AL << 1; |
| 1718 | return; |
| 1719 | } |
| 1720 | break; |
| 1721 | } |
| 1722 | |
| 1723 | IdentifierInfo *Module = AL.getArgAsIdent(0)->Ident; |
| 1724 | |
| 1725 | StringRef ModuleName = Module->getName(); |
| 1726 | if (normalizeName(ModuleName)) { |
| 1727 | Module = &S.PP.getIdentifierTable().get(ModuleName); |
| 1728 | } |
| 1729 | |
| 1730 | SmallVector<ParamIdx, 8> OwnershipArgs; |
| 1731 | for (unsigned i = 1; i < AL.getNumArgs(); ++i) { |
| 1732 | Expr *Ex = AL.getArgAsExpr(i); |
| 1733 | ParamIdx Idx; |
| 1734 | if (!checkFunctionOrMethodParameterIndex(S, D, AL, i, Ex, Idx)) |
| 1735 | return; |
| 1736 | |
| 1737 | // Is the function argument a pointer type? |
| 1738 | QualType T = getFunctionOrMethodParamType(D, Idx.getASTIndex()); |
| 1739 | int Err = -1; // No error |
| 1740 | switch (K) { |
| 1741 | case OwnershipAttr::Takes: |
| 1742 | case OwnershipAttr::Holds: |
| 1743 | if (!T->isAnyPointerType() && !T->isBlockPointerType()) |
| 1744 | Err = 0; |
| 1745 | break; |
| 1746 | case OwnershipAttr::Returns: |
| 1747 | if (!T->isIntegerType()) |
| 1748 | Err = 1; |
| 1749 | break; |
| 1750 | } |
| 1751 | if (-1 != Err) { |
| 1752 | S.Diag(AL.getLoc(), diag::err_ownership_type) << AL << Err |
| 1753 | << Ex->getSourceRange(); |
| 1754 | return; |
| 1755 | } |
| 1756 | |
| 1757 | // Check we don't have a conflict with another ownership attribute. |
| 1758 | for (const auto *I : D->specific_attrs<OwnershipAttr>()) { |
| 1759 | // Cannot have two ownership attributes of different kinds for the same |
| 1760 | // index. |
| 1761 | if (I->getOwnKind() != K && I->args_end() != |
| 1762 | std::find(I->args_begin(), I->args_end(), Idx)) { |
| 1763 | S.Diag(AL.getLoc(), diag::err_attributes_are_not_compatible) << AL << I; |
| 1764 | return; |
| 1765 | } else if (K == OwnershipAttr::Returns && |
| 1766 | I->getOwnKind() == OwnershipAttr::Returns) { |
| 1767 | // A returns attribute conflicts with any other returns attribute using |
| 1768 | // a different index. |
| 1769 | if (std::find(I->args_begin(), I->args_end(), Idx) == I->args_end()) { |
| 1770 | S.Diag(I->getLocation(), diag::err_ownership_returns_index_mismatch) |
| 1771 | << I->args_begin()->getSourceIndex(); |
| 1772 | if (I->args_size()) |
| 1773 | S.Diag(AL.getLoc(), diag::note_ownership_returns_index_mismatch) |
| 1774 | << Idx.getSourceIndex() << Ex->getSourceRange(); |
| 1775 | return; |
| 1776 | } |
| 1777 | } |
| 1778 | } |
| 1779 | OwnershipArgs.push_back(Idx); |
| 1780 | } |
| 1781 | |
| 1782 | ParamIdx *Start = OwnershipArgs.data(); |
| 1783 | unsigned Size = OwnershipArgs.size(); |
| 1784 | llvm::array_pod_sort(Start, Start + Size); |
| 1785 | D->addAttr(::new (S.Context) |
| 1786 | OwnershipAttr(AL.getLoc(), S.Context, Module, Start, Size, |
| 1787 | AL.getAttributeSpellingListIndex())); |
| 1788 | } |
| 1789 | |
| 1790 | static void handleWeakRefAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1791 | // Check the attribute arguments. |
| 1792 | if (AL.getNumArgs() > 1) { |
| 1793 | S.Diag(AL.getLoc(), diag::err_attribute_wrong_number_arguments) << AL << 1; |
| 1794 | return; |
| 1795 | } |
| 1796 | |
| 1797 | // gcc rejects |
| 1798 | // class c { |
| 1799 | // static int a __attribute__((weakref ("v2"))); |
| 1800 | // static int b() __attribute__((weakref ("f3"))); |
| 1801 | // }; |
| 1802 | // and ignores the attributes of |
| 1803 | // void f(void) { |
| 1804 | // static int a __attribute__((weakref ("v2"))); |
| 1805 | // } |
| 1806 | // we reject them |
| 1807 | const DeclContext *Ctx = D->getDeclContext()->getRedeclContext(); |
| 1808 | if (!Ctx->isFileContext()) { |
| 1809 | S.Diag(AL.getLoc(), diag::err_attribute_weakref_not_global_context) |
| 1810 | << cast<NamedDecl>(D); |
| 1811 | return; |
| 1812 | } |
| 1813 | |
| 1814 | // The GCC manual says |
| 1815 | // |
| 1816 | // At present, a declaration to which `weakref' is attached can only |
| 1817 | // be `static'. |
| 1818 | // |
| 1819 | // It also says |
| 1820 | // |
| 1821 | // Without a TARGET, |
| 1822 | // given as an argument to `weakref' or to `alias', `weakref' is |
| 1823 | // equivalent to `weak'. |
| 1824 | // |
| 1825 | // gcc 4.4.1 will accept |
| 1826 | // int a7 __attribute__((weakref)); |
| 1827 | // as |
| 1828 | // int a7 __attribute__((weak)); |
| 1829 | // This looks like a bug in gcc. We reject that for now. We should revisit |
| 1830 | // it if this behaviour is actually used. |
| 1831 | |
| 1832 | // GCC rejects |
| 1833 | // static ((alias ("y"), weakref)). |
| 1834 | // Should we? How to check that weakref is before or after alias? |
| 1835 | |
| 1836 | // FIXME: it would be good for us to keep the WeakRefAttr as-written instead |
| 1837 | // of transforming it into an AliasAttr. The WeakRefAttr never uses the |
| 1838 | // StringRef parameter it was given anyway. |
| 1839 | StringRef Str; |
| 1840 | if (AL.getNumArgs() && S.checkStringLiteralArgumentAttr(AL, 0, Str)) |
| 1841 | // GCC will accept anything as the argument of weakref. Should we |
| 1842 | // check for an existing decl? |
| 1843 | D->addAttr(::new (S.Context) AliasAttr(AL.getRange(), S.Context, Str, |
| 1844 | AL.getAttributeSpellingListIndex())); |
| 1845 | |
| 1846 | D->addAttr(::new (S.Context) |
| 1847 | WeakRefAttr(AL.getRange(), S.Context, |
| 1848 | AL.getAttributeSpellingListIndex())); |
| 1849 | } |
| 1850 | |
| 1851 | static void handleIFuncAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1852 | StringRef Str; |
| 1853 | if (!S.checkStringLiteralArgumentAttr(AL, 0, Str)) |
| 1854 | return; |
| 1855 | |
| 1856 | // Aliases should be on declarations, not definitions. |
| 1857 | const auto *FD = cast<FunctionDecl>(D); |
| 1858 | if (FD->isThisDeclarationADefinition()) { |
| 1859 | S.Diag(AL.getLoc(), diag::err_alias_is_definition) << FD << 1; |
| 1860 | return; |
| 1861 | } |
| 1862 | |
| 1863 | D->addAttr(::new (S.Context) IFuncAttr(AL.getRange(), S.Context, Str, |
| 1864 | AL.getAttributeSpellingListIndex())); |
| 1865 | } |
| 1866 | |
| 1867 | static void handleAliasAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1868 | StringRef Str; |
| 1869 | if (!S.checkStringLiteralArgumentAttr(AL, 0, Str)) |
| 1870 | return; |
| 1871 | |
| 1872 | if (S.Context.getTargetInfo().getTriple().isOSDarwin()) { |
| 1873 | S.Diag(AL.getLoc(), diag::err_alias_not_supported_on_darwin); |
| 1874 | return; |
| 1875 | } |
| 1876 | if (S.Context.getTargetInfo().getTriple().isNVPTX()) { |
| 1877 | S.Diag(AL.getLoc(), diag::err_alias_not_supported_on_nvptx); |
| 1878 | } |
| 1879 | |
| 1880 | // Aliases should be on declarations, not definitions. |
| 1881 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) { |
| 1882 | if (FD->isThisDeclarationADefinition()) { |
| 1883 | S.Diag(AL.getLoc(), diag::err_alias_is_definition) << FD << 0; |
| 1884 | return; |
| 1885 | } |
| 1886 | } else { |
| 1887 | const auto *VD = cast<VarDecl>(D); |
| 1888 | if (VD->isThisDeclarationADefinition() && VD->isExternallyVisible()) { |
| 1889 | S.Diag(AL.getLoc(), diag::err_alias_is_definition) << VD << 0; |
| 1890 | return; |
| 1891 | } |
| 1892 | } |
| 1893 | |
| 1894 | // FIXME: check if target symbol exists in current file |
| 1895 | |
| 1896 | D->addAttr(::new (S.Context) AliasAttr(AL.getRange(), S.Context, Str, |
| 1897 | AL.getAttributeSpellingListIndex())); |
| 1898 | } |
| 1899 | |
| 1900 | static void handleTLSModelAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1901 | StringRef Model; |
| 1902 | SourceLocation LiteralLoc; |
| 1903 | // Check that it is a string. |
| 1904 | if (!S.checkStringLiteralArgumentAttr(AL, 0, Model, &LiteralLoc)) |
| 1905 | return; |
| 1906 | |
| 1907 | // Check that the value. |
| 1908 | if (Model != "global-dynamic" && Model != "local-dynamic" |
| 1909 | && Model != "initial-exec" && Model != "local-exec") { |
| 1910 | S.Diag(LiteralLoc, diag::err_attr_tlsmodel_arg); |
| 1911 | return; |
| 1912 | } |
| 1913 | |
| 1914 | D->addAttr(::new (S.Context) |
| 1915 | TLSModelAttr(AL.getRange(), S.Context, Model, |
| 1916 | AL.getAttributeSpellingListIndex())); |
| 1917 | } |
| 1918 | |
| 1919 | static void handleRestrictAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1920 | QualType ResultType = getFunctionOrMethodResultType(D); |
| 1921 | if (ResultType->isAnyPointerType() || ResultType->isBlockPointerType()) { |
| 1922 | D->addAttr(::new (S.Context) RestrictAttr( |
| 1923 | AL.getRange(), S.Context, AL.getAttributeSpellingListIndex())); |
| 1924 | return; |
| 1925 | } |
| 1926 | |
| 1927 | S.Diag(AL.getLoc(), diag::warn_attribute_return_pointers_only) |
| 1928 | << AL << getFunctionOrMethodResultSourceRange(D); |
| 1929 | } |
| 1930 | |
| 1931 | static void handleCPUSpecificAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1932 | FunctionDecl *FD = cast<FunctionDecl>(D); |
| 1933 | |
| 1934 | if (const auto *MD = dyn_cast<CXXMethodDecl>(D)) { |
| 1935 | if (MD->getParent()->isLambda()) { |
| 1936 | S.Diag(AL.getLoc(), diag::err_attribute_dll_lambda) << AL; |
| 1937 | return; |
| 1938 | } |
| 1939 | } |
| 1940 | |
| 1941 | if (!checkAttributeAtLeastNumArgs(S, AL, 1)) |
| 1942 | return; |
| 1943 | |
| 1944 | SmallVector<IdentifierInfo *, 8> CPUs; |
| 1945 | for (unsigned ArgNo = 0; ArgNo < getNumAttributeArgs(AL); ++ArgNo) { |
| 1946 | if (!AL.isArgIdent(ArgNo)) { |
| 1947 | S.Diag(AL.getLoc(), diag::err_attribute_argument_type) |
| 1948 | << AL << AANT_ArgumentIdentifier; |
| 1949 | return; |
| 1950 | } |
| 1951 | |
| 1952 | IdentifierLoc *CPUArg = AL.getArgAsIdent(ArgNo); |
| 1953 | StringRef CPUName = CPUArg->Ident->getName().trim(); |
| 1954 | |
| 1955 | if (!S.Context.getTargetInfo().validateCPUSpecificCPUDispatch(CPUName)) { |
| 1956 | S.Diag(CPUArg->Loc, diag::err_invalid_cpu_specific_dispatch_value) |
| 1957 | << CPUName << (AL.getKind() == ParsedAttr::AT_CPUDispatch); |
| 1958 | return; |
| 1959 | } |
| 1960 | |
| 1961 | const TargetInfo &Target = S.Context.getTargetInfo(); |
| 1962 | if (llvm::any_of(CPUs, [CPUName, &Target](const IdentifierInfo *Cur) { |
| 1963 | return Target.CPUSpecificManglingCharacter(CPUName) == |
| 1964 | Target.CPUSpecificManglingCharacter(Cur->getName()); |
| 1965 | })) { |
| 1966 | S.Diag(AL.getLoc(), diag::warn_multiversion_duplicate_entries); |
| 1967 | return; |
| 1968 | } |
| 1969 | CPUs.push_back(CPUArg->Ident); |
| 1970 | } |
| 1971 | |
| 1972 | FD->setIsMultiVersion(true); |
| 1973 | if (AL.getKind() == ParsedAttr::AT_CPUSpecific) |
| 1974 | D->addAttr(::new (S.Context) CPUSpecificAttr( |
| 1975 | AL.getRange(), S.Context, CPUs.data(), CPUs.size(), |
| 1976 | AL.getAttributeSpellingListIndex())); |
| 1977 | else |
| 1978 | D->addAttr(::new (S.Context) CPUDispatchAttr( |
| 1979 | AL.getRange(), S.Context, CPUs.data(), CPUs.size(), |
| 1980 | AL.getAttributeSpellingListIndex())); |
| 1981 | } |
| 1982 | |
| 1983 | static void handleCommonAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1984 | if (S.LangOpts.CPlusPlus) { |
| 1985 | S.Diag(AL.getLoc(), diag::err_attribute_not_supported_in_lang) |
| 1986 | << AL << AttributeLangSupport::Cpp; |
| 1987 | return; |
| 1988 | } |
| 1989 | |
| 1990 | if (CommonAttr *CA = S.mergeCommonAttr(D, AL)) |
| 1991 | D->addAttr(CA); |
| 1992 | } |
| 1993 | |
| 1994 | static void handleNakedAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 1995 | if (checkAttrMutualExclusion<DisableTailCallsAttr>(S, D, AL)) |
| 1996 | return; |
| 1997 | |
| 1998 | if (AL.isDeclspecAttribute()) { |
| 1999 | const auto &Triple = S.getASTContext().getTargetInfo().getTriple(); |
| 2000 | const auto &Arch = Triple.getArch(); |
| 2001 | if (Arch != llvm::Triple::x86 && |
| 2002 | (Arch != llvm::Triple::arm && Arch != llvm::Triple::thumb)) { |
| 2003 | S.Diag(AL.getLoc(), diag::err_attribute_not_supported_on_arch) |
| 2004 | << AL << Triple.getArchName(); |
| 2005 | return; |
| 2006 | } |
| 2007 | } |
| 2008 | |
| 2009 | D->addAttr(::new (S.Context) NakedAttr(AL.getRange(), S.Context, |
| 2010 | AL.getAttributeSpellingListIndex())); |
| 2011 | } |
| 2012 | |
| 2013 | static void handleNoReturnAttr(Sema &S, Decl *D, const ParsedAttr &Attrs) { |
| 2014 | if (hasDeclarator(D)) return; |
| 2015 | |
| 2016 | if (!isa<ObjCMethodDecl>(D)) { |
| 2017 | S.Diag(Attrs.getLoc(), diag::warn_attribute_wrong_decl_type) |
| 2018 | << Attrs << ExpectedFunctionOrMethod; |
| 2019 | return; |
| 2020 | } |
| 2021 | |
| 2022 | D->addAttr(::new (S.Context) NoReturnAttr( |
| 2023 | Attrs.getRange(), S.Context, Attrs.getAttributeSpellingListIndex())); |
| 2024 | } |
| 2025 | |
| 2026 | static void handleNoCfCheckAttr(Sema &S, Decl *D, const ParsedAttr &Attrs) { |
| 2027 | if (!S.getLangOpts().CFProtectionBranch) |
| 2028 | S.Diag(Attrs.getLoc(), diag::warn_nocf_check_attribute_ignored); |
| 2029 | else |
| 2030 | handleSimpleAttribute<AnyX86NoCfCheckAttr>(S, D, Attrs); |
| 2031 | } |
| 2032 | |
| 2033 | bool Sema::CheckAttrNoArgs(const ParsedAttr &Attrs) { |
| 2034 | if (!checkAttributeNumArgs(*this, Attrs, 0)) { |
| 2035 | Attrs.setInvalid(); |
| 2036 | return true; |
| 2037 | } |
| 2038 | |
| 2039 | return false; |
| 2040 | } |
| 2041 | |
| 2042 | bool Sema::CheckAttrTarget(const ParsedAttr &AL) { |
| 2043 | // Check whether the attribute is valid on the current target. |
| 2044 | if (!AL.existsInTarget(Context.getTargetInfo())) { |
| 2045 | Diag(AL.getLoc(), diag::warn_unknown_attribute_ignored) << AL; |
| 2046 | AL.setInvalid(); |
| 2047 | return true; |
| 2048 | } |
| 2049 | |
| 2050 | return false; |
| 2051 | } |
| 2052 | |
| 2053 | static void handleAnalyzerNoReturnAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 2054 | |
| 2055 | // The checking path for 'noreturn' and 'analyzer_noreturn' are different |
| 2056 | // because 'analyzer_noreturn' does not impact the type. |
| 2057 | if (!isFunctionOrMethodOrBlock(D)) { |
| 2058 | ValueDecl *VD = dyn_cast<ValueDecl>(D); |
| 2059 | if (!VD || (!VD->getType()->isBlockPointerType() && |
| 2060 | !VD->getType()->isFunctionPointerType())) { |
| 2061 | S.Diag(AL.getLoc(), AL.isCXX11Attribute() |
| 2062 | ? diag::err_attribute_wrong_decl_type |
| 2063 | : diag::warn_attribute_wrong_decl_type) |
| 2064 | << AL << ExpectedFunctionMethodOrBlock; |
| 2065 | return; |
| 2066 | } |
| 2067 | } |
| 2068 | |
| 2069 | D->addAttr(::new (S.Context) |
| 2070 | AnalyzerNoReturnAttr(AL.getRange(), S.Context, |
| 2071 | AL.getAttributeSpellingListIndex())); |
| 2072 | } |
| 2073 | |
| 2074 | // PS3 PPU-specific. |
| 2075 | static void handleVecReturnAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 2076 | /* |
| 2077 | Returning a Vector Class in Registers |
| 2078 | |
| 2079 | According to the PPU ABI specifications, a class with a single member of |
| 2080 | vector type is returned in memory when used as the return value of a |
| 2081 | function. |
| 2082 | This results in inefficient code when implementing vector classes. To return |
| 2083 | the value in a single vector register, add the vecreturn attribute to the |
| 2084 | class definition. This attribute is also applicable to struct types. |
| 2085 | |
| 2086 | Example: |
| 2087 | |
| 2088 | struct Vector |
| 2089 | { |
| 2090 | __vector float xyzw; |
| 2091 | } __attribute__((vecreturn)); |
| 2092 | |
| 2093 | Vector Add(Vector lhs, Vector rhs) |
| 2094 | { |
| 2095 | Vector result; |
| 2096 | result.xyzw = vec_add(lhs.xyzw, rhs.xyzw); |
| 2097 | return result; // This will be returned in a register |
| 2098 | } |
| 2099 | */ |
| 2100 | if (VecReturnAttr *A = D->getAttr<VecReturnAttr>()) { |
| 2101 | S.Diag(AL.getLoc(), diag::err_repeat_attribute) << A; |
| 2102 | return; |
| 2103 | } |
| 2104 | |
| 2105 | const auto *R = cast<RecordDecl>(D); |
| 2106 | int count = 0; |
| 2107 | |
| 2108 | if (!isa<CXXRecordDecl>(R)) { |
| 2109 | S.Diag(AL.getLoc(), diag::err_attribute_vecreturn_only_vector_member); |
| 2110 | return; |
| 2111 | } |
| 2112 | |
| 2113 | if (!cast<CXXRecordDecl>(R)->isPOD()) { |
| 2114 | S.Diag(AL.getLoc(), diag::err_attribute_vecreturn_only_pod_record); |
| 2115 | return; |
| 2116 | } |
| 2117 | |
| 2118 | for (const auto *I : R->fields()) { |
| 2119 | if ((count == 1) || !I->getType()->isVectorType()) { |
| 2120 | S.Diag(AL.getLoc(), diag::err_attribute_vecreturn_only_vector_member); |
| 2121 | return; |
| 2122 | } |
| 2123 | count++; |
| 2124 | } |
| 2125 | |
| 2126 | D->addAttr(::new (S.Context) VecReturnAttr( |
| 2127 | AL.getRange(), S.Context, AL.getAttributeSpellingListIndex())); |
| 2128 | } |
| 2129 | |
| 2130 | static void handleDependencyAttr(Sema &S, Scope *Scope, Decl *D, |
| 2131 | const ParsedAttr &AL) { |
| 2132 | if (isa<ParmVarDecl>(D)) { |
| 2133 | // [[carries_dependency]] can only be applied to a parameter if it is a |
| 2134 | // parameter of a function declaration or lambda. |
| 2135 | if (!(Scope->getFlags() & clang::Scope::FunctionDeclarationScope)) { |
| 2136 | S.Diag(AL.getLoc(), |
| 2137 | diag::err_carries_dependency_param_not_function_decl); |
| 2138 | return; |
| 2139 | } |
| 2140 | } |
| 2141 | |
| 2142 | D->addAttr(::new (S.Context) CarriesDependencyAttr( |
| 2143 | AL.getRange(), S.Context, |
| 2144 | AL.getAttributeSpellingListIndex())); |
| 2145 | } |
| 2146 | |
| 2147 | static void handleUnusedAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 2148 | bool IsCXX17Attr = AL.isCXX11Attribute() && !AL.getScopeName(); |
| 2149 | |
| 2150 | // If this is spelled as the standard C++17 attribute, but not in C++17, warn |
| 2151 | // about using it as an extension. |
| 2152 | if (!S.getLangOpts().CPlusPlus17 && IsCXX17Attr) |
| 2153 | S.Diag(AL.getLoc(), diag::ext_cxx17_attr) << AL; |
| 2154 | |
| 2155 | D->addAttr(::new (S.Context) UnusedAttr( |
| 2156 | AL.getRange(), S.Context, AL.getAttributeSpellingListIndex())); |
| 2157 | } |
| 2158 | |
| 2159 | static void handleConstructorAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 2160 | uint32_t priority = ConstructorAttr::DefaultPriority; |
| 2161 | if (AL.getNumArgs() && |
| 2162 | !checkUInt32Argument(S, AL, AL.getArgAsExpr(0), priority)) |
| 2163 | return; |
| 2164 | |
| 2165 | D->addAttr(::new (S.Context) |
| 2166 | ConstructorAttr(AL.getRange(), S.Context, priority, |
| 2167 | AL.getAttributeSpellingListIndex())); |
| 2168 | } |
| 2169 | |
| 2170 | static void handleDestructorAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 2171 | uint32_t priority = DestructorAttr::DefaultPriority; |
| 2172 | if (AL.getNumArgs() && |
| 2173 | !checkUInt32Argument(S, AL, AL.getArgAsExpr(0), priority)) |
| 2174 | return; |
| 2175 | |
| 2176 | D->addAttr(::new (S.Context) |
| 2177 | DestructorAttr(AL.getRange(), S.Context, priority, |
| 2178 | AL.getAttributeSpellingListIndex())); |
| 2179 | } |
| 2180 | |
| 2181 | template <typename AttrTy> |
| 2182 | static void handleAttrWithMessage(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 2183 | // Handle the case where the attribute has a text message. |
| 2184 | StringRef Str; |
| 2185 | if (AL.getNumArgs() == 1 && !S.checkStringLiteralArgumentAttr(AL, 0, Str)) |
| 2186 | return; |
| 2187 | |
| 2188 | D->addAttr(::new (S.Context) AttrTy(AL.getRange(), S.Context, Str, |
| 2189 | AL.getAttributeSpellingListIndex())); |
| 2190 | } |
| 2191 | |
| 2192 | static void handleObjCSuppresProtocolAttr(Sema &S, Decl *D, |
| 2193 | const ParsedAttr &AL) { |
| 2194 | if (!cast<ObjCProtocolDecl>(D)->isThisDeclarationADefinition()) { |
| 2195 | S.Diag(AL.getLoc(), diag::err_objc_attr_protocol_requires_definition) |
| 2196 | << AL << AL.getRange(); |
| 2197 | return; |
| 2198 | } |
| 2199 | |
| 2200 | D->addAttr(::new (S.Context) |
| 2201 | ObjCExplicitProtocolImplAttr(AL.getRange(), S.Context, |
| 2202 | AL.getAttributeSpellingListIndex())); |
| 2203 | } |
| 2204 | |
| 2205 | static bool checkAvailabilityAttr(Sema &S, SourceRange Range, |
| 2206 | IdentifierInfo *Platform, |
| 2207 | VersionTuple Introduced, |
| 2208 | VersionTuple Deprecated, |
| 2209 | VersionTuple Obsoleted) { |
| 2210 | StringRef PlatformName |
| 2211 | = AvailabilityAttr::getPrettyPlatformName(Platform->getName()); |
| 2212 | if (PlatformName.empty()) |
| 2213 | PlatformName = Platform->getName(); |
| 2214 | |
| 2215 | // Ensure that Introduced <= Deprecated <= Obsoleted (although not all |
| 2216 | // of these steps are needed). |
| 2217 | if (!Introduced.empty() && !Deprecated.empty() && |
| 2218 | !(Introduced <= Deprecated)) { |
| 2219 | S.Diag(Range.getBegin(), diag::warn_availability_version_ordering) |
| 2220 | << 1 << PlatformName << Deprecated.getAsString() |
| 2221 | << 0 << Introduced.getAsString(); |
| 2222 | return true; |
| 2223 | } |
| 2224 | |
| 2225 | if (!Introduced.empty() && !Obsoleted.empty() && |
| 2226 | !(Introduced <= Obsoleted)) { |
| 2227 | S.Diag(Range.getBegin(), diag::warn_availability_version_ordering) |
| 2228 | << 2 << PlatformName << Obsoleted.getAsString() |
| 2229 | << 0 << Introduced.getAsString(); |
| 2230 | return true; |
| 2231 | } |
| 2232 | |
| 2233 | if (!Deprecated.empty() && !Obsoleted.empty() && |
| 2234 | !(Deprecated <= Obsoleted)) { |
| 2235 | S.Diag(Range.getBegin(), diag::warn_availability_version_ordering) |
| 2236 | << 2 << PlatformName << Obsoleted.getAsString() |
| 2237 | << 1 << Deprecated.getAsString(); |
| 2238 | return true; |
| 2239 | } |
| 2240 | |
| 2241 | return false; |
| 2242 | } |
| 2243 | |
| 2244 | /// Check whether the two versions match. |
| 2245 | /// |
| 2246 | /// If either version tuple is empty, then they are assumed to match. If |
| 2247 | /// \p BeforeIsOkay is true, then \p X can be less than or equal to \p Y. |
| 2248 | static bool versionsMatch(const VersionTuple &X, const VersionTuple &Y, |
| 2249 | bool BeforeIsOkay) { |
| 2250 | if (X.empty() || Y.empty()) |
| 2251 | return true; |
| 2252 | |
| 2253 | if (X == Y) |
| 2254 | return true; |
| 2255 | |
| 2256 | if (BeforeIsOkay && X < Y) |
| 2257 | return true; |
| 2258 | |
| 2259 | return false; |
| 2260 | } |
| 2261 | |
| 2262 | AvailabilityAttr *Sema::mergeAvailabilityAttr(NamedDecl *D, SourceRange Range, |
| 2263 | IdentifierInfo *Platform, |
| 2264 | bool Implicit, |
| 2265 | VersionTuple Introduced, |
| 2266 | VersionTuple Deprecated, |
| 2267 | VersionTuple Obsoleted, |
| 2268 | bool IsUnavailable, |
| 2269 | StringRef Message, |
| 2270 | bool IsStrict, |
| 2271 | StringRef Replacement, |
| 2272 | AvailabilityMergeKind AMK, |
| 2273 | unsigned AttrSpellingListIndex) { |
| 2274 | VersionTuple MergedIntroduced = Introduced; |
| 2275 | VersionTuple MergedDeprecated = Deprecated; |
| 2276 | VersionTuple MergedObsoleted = Obsoleted; |
| 2277 | bool FoundAny = false; |
| 2278 | bool OverrideOrImpl = false; |
| 2279 | switch (AMK) { |
| 2280 | case AMK_None: |
| 2281 | case AMK_Redeclaration: |
| 2282 | OverrideOrImpl = false; |
| 2283 | break; |
| 2284 | |
| 2285 | case AMK_Override: |
| 2286 | case AMK_ProtocolImplementation: |
| 2287 | OverrideOrImpl = true; |
| 2288 | break; |
| 2289 | } |
| 2290 | |
| 2291 | if (D->hasAttrs()) { |
| 2292 | AttrVec &Attrs = D->getAttrs(); |
| 2293 | for (unsigned i = 0, e = Attrs.size(); i != e;) { |
| 2294 | const auto *OldAA = dyn_cast<AvailabilityAttr>(Attrs[i]); |
| 2295 | if (!OldAA) { |
| 2296 | ++i; |
| 2297 | continue; |
| 2298 | } |
| 2299 | |
| 2300 | IdentifierInfo *OldPlatform = OldAA->getPlatform(); |
| 2301 | if (OldPlatform != Platform) { |
| 2302 | ++i; |
| 2303 | continue; |
| 2304 | } |
| 2305 | |
| 2306 | // If there is an existing availability attribute for this platform that |
| 2307 | // is explicit and the new one is implicit use the explicit one and |
| 2308 | // discard the new implicit attribute. |
| 2309 | if (!OldAA->isImplicit() && Implicit) { |
| 2310 | return nullptr; |
| 2311 | } |
| 2312 | |
| 2313 | // If there is an existing attribute for this platform that is implicit |
| 2314 | // and the new attribute is explicit then erase the old one and |
| 2315 | // continue processing the attributes. |
| 2316 | if (!Implicit && OldAA->isImplicit()) { |
| 2317 | Attrs.erase(Attrs.begin() + i); |
| 2318 | --e; |
| 2319 | continue; |
| 2320 | } |
| 2321 | |
| 2322 | FoundAny = true; |
| 2323 | VersionTuple OldIntroduced = OldAA->getIntroduced(); |
| 2324 | VersionTuple OldDeprecated = OldAA->getDeprecated(); |
| 2325 | VersionTuple OldObsoleted = OldAA->getObsoleted(); |
| 2326 | bool OldIsUnavailable = OldAA->getUnavailable(); |
| 2327 | |
| 2328 | if (!versionsMatch(OldIntroduced, Introduced, OverrideOrImpl) || |
| 2329 | !versionsMatch(Deprecated, OldDeprecated, OverrideOrImpl) || |
| 2330 | !versionsMatch(Obsoleted, OldObsoleted, OverrideOrImpl) || |
| 2331 | !(OldIsUnavailable == IsUnavailable || |
| 2332 | (OverrideOrImpl && !OldIsUnavailable && IsUnavailable))) { |
| 2333 | if (OverrideOrImpl) { |
| 2334 | int Which = -1; |
| 2335 | VersionTuple FirstVersion; |
| 2336 | VersionTuple SecondVersion; |
| 2337 | if (!versionsMatch(OldIntroduced, Introduced, OverrideOrImpl)) { |
| 2338 | Which = 0; |
| 2339 | FirstVersion = OldIntroduced; |
| 2340 | SecondVersion = Introduced; |
| 2341 | } else if (!versionsMatch(Deprecated, OldDeprecated, OverrideOrImpl)) { |
| 2342 | Which = 1; |
| 2343 | FirstVersion = Deprecated; |
| 2344 | SecondVersion = OldDeprecated; |
| 2345 | } else if (!versionsMatch(Obsoleted, OldObsoleted, OverrideOrImpl)) { |
| 2346 | Which = 2; |
| 2347 | FirstVersion = Obsoleted; |
| 2348 | SecondVersion = OldObsoleted; |
| 2349 | } |
| 2350 | |
| 2351 | if (Which == -1) { |
| 2352 | Diag(OldAA->getLocation(), |
| 2353 | diag::warn_mismatched_availability_override_unavail) |
| 2354 | << AvailabilityAttr::getPrettyPlatformName(Platform->getName()) |
| 2355 | << (AMK == AMK_Override); |
| 2356 | } else { |
| 2357 | Diag(OldAA->getLocation(), |
| 2358 | diag::warn_mismatched_availability_override) |
| 2359 | << Which |
| 2360 | << AvailabilityAttr::getPrettyPlatformName(Platform->getName()) |
| 2361 | << FirstVersion.getAsString() << SecondVersion.getAsString() |
| 2362 | << (AMK == AMK_Override); |
| 2363 | } |
| 2364 | if (AMK == AMK_Override) |
| 2365 | Diag(Range.getBegin(), diag::note_overridden_method); |
| 2366 | else |
| 2367 | Diag(Range.getBegin(), diag::note_protocol_method); |
| 2368 | } else { |
| 2369 | Diag(OldAA->getLocation(), diag::warn_mismatched_availability); |
| 2370 | Diag(Range.getBegin(), diag::note_previous_attribute); |
| 2371 | } |
| 2372 | |
| 2373 | Attrs.erase(Attrs.begin() + i); |
| 2374 | --e; |
| 2375 | continue; |
| 2376 | } |
| 2377 | |
| 2378 | VersionTuple MergedIntroduced2 = MergedIntroduced; |
| 2379 | VersionTuple MergedDeprecated2 = MergedDeprecated; |
| 2380 | VersionTuple MergedObsoleted2 = MergedObsoleted; |
| 2381 | |
| 2382 | if (MergedIntroduced2.empty()) |
| 2383 | MergedIntroduced2 = OldIntroduced; |
| 2384 | if (MergedDeprecated2.empty()) |
| 2385 | MergedDeprecated2 = OldDeprecated; |
| 2386 | if (MergedObsoleted2.empty()) |
| 2387 | MergedObsoleted2 = OldObsoleted; |
| 2388 | |
| 2389 | if (checkAvailabilityAttr(*this, OldAA->getRange(), Platform, |
| 2390 | MergedIntroduced2, MergedDeprecated2, |
| 2391 | MergedObsoleted2)) { |
| 2392 | Attrs.erase(Attrs.begin() + i); |
| 2393 | --e; |
| 2394 | continue; |
| 2395 | } |
| 2396 | |
| 2397 | MergedIntroduced = MergedIntroduced2; |
| 2398 | MergedDeprecated = MergedDeprecated2; |
| 2399 | MergedObsoleted = MergedObsoleted2; |
| 2400 | ++i; |
| 2401 | } |
| 2402 | } |
| 2403 | |
| 2404 | if (FoundAny && |
| 2405 | MergedIntroduced == Introduced && |
| 2406 | MergedDeprecated == Deprecated && |
| 2407 | MergedObsoleted == Obsoleted) |
| 2408 | return nullptr; |
| 2409 | |
| 2410 | // Only create a new attribute if !OverrideOrImpl, but we want to do |
| 2411 | // the checking. |
| 2412 | if (!checkAvailabilityAttr(*this, Range, Platform, MergedIntroduced, |
| 2413 | MergedDeprecated, MergedObsoleted) && |
| 2414 | !OverrideOrImpl) { |
| 2415 | auto *Avail = ::new (Context) AvailabilityAttr(Range, Context, Platform, |
| 2416 | Introduced, Deprecated, |
| 2417 | Obsoleted, IsUnavailable, Message, |
| 2418 | IsStrict, Replacement, |
| 2419 | AttrSpellingListIndex); |
| 2420 | Avail->setImplicit(Implicit); |
| 2421 | return Avail; |
| 2422 | } |
| 2423 | return nullptr; |
| 2424 | } |
| 2425 | |
| 2426 | static void handleAvailabilityAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 2427 | if (!checkAttributeNumArgs(S, AL, 1)) |
| 2428 | return; |
| 2429 | IdentifierLoc *Platform = AL.getArgAsIdent(0); |
| 2430 | unsigned Index = AL.getAttributeSpellingListIndex(); |
| 2431 | |
| 2432 | IdentifierInfo *II = Platform->Ident; |
| 2433 | if (AvailabilityAttr::getPrettyPlatformName(II->getName()).empty()) |
| 2434 | S.Diag(Platform->Loc, diag::warn_availability_unknown_platform) |
| 2435 | << Platform->Ident; |
| 2436 | |
| 2437 | auto *ND = dyn_cast<NamedDecl>(D); |
| 2438 | if (!ND) // We warned about this already, so just return. |
| 2439 | return; |
| 2440 | |
| 2441 | AvailabilityChange Introduced = AL.getAvailabilityIntroduced(); |
| 2442 | AvailabilityChange Deprecated = AL.getAvailabilityDeprecated(); |
| 2443 | AvailabilityChange Obsoleted = AL.getAvailabilityObsoleted(); |
| 2444 | bool IsUnavailable = AL.getUnavailableLoc().isValid(); |
| 2445 | bool IsStrict = AL.getStrictLoc().isValid(); |
| 2446 | StringRef Str; |
| 2447 | if (const auto *SE = dyn_cast_or_null<StringLiteral>(AL.getMessageExpr())) |
| 2448 | Str = SE->getString(); |
| 2449 | StringRef Replacement; |
| 2450 | if (const auto *SE = dyn_cast_or_null<StringLiteral>(AL.getReplacementExpr())) |
| 2451 | Replacement = SE->getString(); |
| 2452 | |
| 2453 | if (II->isStr("swift")) { |
| 2454 | if (Introduced.isValid() || Obsoleted.isValid() || |
| 2455 | (!IsUnavailable && !Deprecated.isValid())) { |
| 2456 | S.Diag(AL.getLoc(), |
| 2457 | diag::warn_availability_swift_unavailable_deprecated_only); |
| 2458 | return; |
| 2459 | } |
| 2460 | } |
| 2461 | |
| 2462 | AvailabilityAttr *NewAttr = S.mergeAvailabilityAttr(ND, AL.getRange(), II, |
| 2463 | false/*Implicit*/, |
| 2464 | Introduced.Version, |
| 2465 | Deprecated.Version, |
| 2466 | Obsoleted.Version, |
| 2467 | IsUnavailable, Str, |
| 2468 | IsStrict, Replacement, |
| 2469 | Sema::AMK_None, |
| 2470 | Index); |
| 2471 | if (NewAttr) |
| 2472 | D->addAttr(NewAttr); |
| 2473 | |
| 2474 | // Transcribe "ios" to "watchos" (and add a new attribute) if the versioning |
| 2475 | // matches before the start of the watchOS platform. |
| 2476 | if (S.Context.getTargetInfo().getTriple().isWatchOS()) { |
| 2477 | IdentifierInfo *NewII = nullptr; |
| 2478 | if (II->getName() == "ios") |
| 2479 | NewII = &S.Context.Idents.get("watchos"); |
| 2480 | else if (II->getName() == "ios_app_extension") |
| 2481 | NewII = &S.Context.Idents.get("watchos_app_extension"); |
| 2482 | |
| 2483 | if (NewII) { |
| 2484 | auto adjustWatchOSVersion = [](VersionTuple Version) -> VersionTuple { |
| 2485 | if (Version.empty()) |
| 2486 | return Version; |
| 2487 | auto Major = Version.getMajor(); |
| 2488 | auto NewMajor = Major >= 9 ? Major - 7 : 0; |
| 2489 | if (NewMajor >= 2) { |
| 2490 | if (Version.getMinor().hasValue()) { |
| 2491 | if (Version.getSubminor().hasValue()) |
| 2492 | return VersionTuple(NewMajor, Version.getMinor().getValue(), |
| 2493 | Version.getSubminor().getValue()); |
| 2494 | else |
| 2495 | return VersionTuple(NewMajor, Version.getMinor().getValue()); |
| 2496 | } |
| 2497 | } |
| 2498 | |
| 2499 | return VersionTuple(2, 0); |
| 2500 | }; |
| 2501 | |
| 2502 | auto NewIntroduced = adjustWatchOSVersion(Introduced.Version); |
| 2503 | auto NewDeprecated = adjustWatchOSVersion(Deprecated.Version); |
| 2504 | auto NewObsoleted = adjustWatchOSVersion(Obsoleted.Version); |
| 2505 | |
| 2506 | AvailabilityAttr *NewAttr = S.mergeAvailabilityAttr(ND, |
| 2507 | AL.getRange(), |
| 2508 | NewII, |
| 2509 | true/*Implicit*/, |
| 2510 | NewIntroduced, |
| 2511 | NewDeprecated, |
| 2512 | NewObsoleted, |
| 2513 | IsUnavailable, Str, |
| 2514 | IsStrict, |
| 2515 | Replacement, |
| 2516 | Sema::AMK_None, |
| 2517 | Index); |
| 2518 | if (NewAttr) |
| 2519 | D->addAttr(NewAttr); |
| 2520 | } |
| 2521 | } else if (S.Context.getTargetInfo().getTriple().isTvOS()) { |
| 2522 | // Transcribe "ios" to "tvos" (and add a new attribute) if the versioning |
| 2523 | // matches before the start of the tvOS platform. |
| 2524 | IdentifierInfo *NewII = nullptr; |
| 2525 | if (II->getName() == "ios") |
| 2526 | NewII = &S.Context.Idents.get("tvos"); |
| 2527 | else if (II->getName() == "ios_app_extension") |
| 2528 | NewII = &S.Context.Idents.get("tvos_app_extension"); |
| 2529 | |
| 2530 | if (NewII) { |
| 2531 | AvailabilityAttr *NewAttr = S.mergeAvailabilityAttr(ND, |
| 2532 | AL.getRange(), |
| 2533 | NewII, |
| 2534 | true/*Implicit*/, |
| 2535 | Introduced.Version, |
| 2536 | Deprecated.Version, |
| 2537 | Obsoleted.Version, |
| 2538 | IsUnavailable, Str, |
| 2539 | IsStrict, |
| 2540 | Replacement, |
| 2541 | Sema::AMK_None, |
| 2542 | Index); |
| 2543 | if (NewAttr) |
| 2544 | D->addAttr(NewAttr); |
| 2545 | } |
| 2546 | } |
| 2547 | } |
| 2548 | |
| 2549 | static void handleExternalSourceSymbolAttr(Sema &S, Decl *D, |
| 2550 | const ParsedAttr &AL) { |
| 2551 | if (!checkAttributeAtLeastNumArgs(S, AL, 1)) |
| 2552 | return; |
| 2553 | assert(checkAttributeAtMostNumArgs(S, AL, 3) &&((checkAttributeAtMostNumArgs(S, AL, 3) && "Invalid number of arguments in an external_source_symbol attribute" ) ? static_cast<void> (0) : __assert_fail ("checkAttributeAtMostNumArgs(S, AL, 3) && \"Invalid number of arguments in an external_source_symbol attribute\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 2554, __PRETTY_FUNCTION__)) |
| 2554 | "Invalid number of arguments in an external_source_symbol attribute")((checkAttributeAtMostNumArgs(S, AL, 3) && "Invalid number of arguments in an external_source_symbol attribute" ) ? static_cast<void> (0) : __assert_fail ("checkAttributeAtMostNumArgs(S, AL, 3) && \"Invalid number of arguments in an external_source_symbol attribute\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 2554, __PRETTY_FUNCTION__)); |
| 2555 | |
| 2556 | StringRef Language; |
| 2557 | if (const auto *SE = dyn_cast_or_null<StringLiteral>(AL.getArgAsExpr(0))) |
| 2558 | Language = SE->getString(); |
| 2559 | StringRef DefinedIn; |
| 2560 | if (const auto *SE = dyn_cast_or_null<StringLiteral>(AL.getArgAsExpr(1))) |
| 2561 | DefinedIn = SE->getString(); |
| 2562 | bool IsGeneratedDeclaration = AL.getArgAsIdent(2) != nullptr; |
| 2563 | |
| 2564 | D->addAttr(::new (S.Context) ExternalSourceSymbolAttr( |
| 2565 | AL.getRange(), S.Context, Language, DefinedIn, IsGeneratedDeclaration, |
| 2566 | AL.getAttributeSpellingListIndex())); |
| 2567 | } |
| 2568 | |
| 2569 | template <class T> |
| 2570 | static T *mergeVisibilityAttr(Sema &S, Decl *D, SourceRange range, |
| 2571 | typename T::VisibilityType value, |
| 2572 | unsigned attrSpellingListIndex) { |
| 2573 | T *existingAttr = D->getAttr<T>(); |
| 2574 | if (existingAttr) { |
| 2575 | typename T::VisibilityType existingValue = existingAttr->getVisibility(); |
| 2576 | if (existingValue == value) |
| 2577 | return nullptr; |
| 2578 | S.Diag(existingAttr->getLocation(), diag::err_mismatched_visibility); |
| 2579 | S.Diag(range.getBegin(), diag::note_previous_attribute); |
| 2580 | D->dropAttr<T>(); |
| 2581 | } |
| 2582 | return ::new (S.Context) T(range, S.Context, value, attrSpellingListIndex); |
| 2583 | } |
| 2584 | |
| 2585 | VisibilityAttr *Sema::mergeVisibilityAttr(Decl *D, SourceRange Range, |
| 2586 | VisibilityAttr::VisibilityType Vis, |
| 2587 | unsigned AttrSpellingListIndex) { |
| 2588 | return ::mergeVisibilityAttr<VisibilityAttr>(*this, D, Range, Vis, |
| 2589 | AttrSpellingListIndex); |
| 2590 | } |
| 2591 | |
| 2592 | TypeVisibilityAttr *Sema::mergeTypeVisibilityAttr(Decl *D, SourceRange Range, |
| 2593 | TypeVisibilityAttr::VisibilityType Vis, |
| 2594 | unsigned AttrSpellingListIndex) { |
| 2595 | return ::mergeVisibilityAttr<TypeVisibilityAttr>(*this, D, Range, Vis, |
| 2596 | AttrSpellingListIndex); |
| 2597 | } |
| 2598 | |
| 2599 | static void handleVisibilityAttr(Sema &S, Decl *D, const ParsedAttr &AL, |
| 2600 | bool isTypeVisibility) { |
| 2601 | // Visibility attributes don't mean anything on a typedef. |
| 2602 | if (isa<TypedefNameDecl>(D)) { |
| 2603 | S.Diag(AL.getRange().getBegin(), diag::warn_attribute_ignored) << AL; |
| 2604 | return; |
| 2605 | } |
| 2606 | |
| 2607 | // 'type_visibility' can only go on a type or namespace. |
| 2608 | if (isTypeVisibility && |
| 2609 | !(isa<TagDecl>(D) || |
| 2610 | isa<ObjCInterfaceDecl>(D) || |
| 2611 | isa<NamespaceDecl>(D))) { |
| 2612 | S.Diag(AL.getRange().getBegin(), diag::err_attribute_wrong_decl_type) |
| 2613 | << AL << ExpectedTypeOrNamespace; |
| 2614 | return; |
| 2615 | } |
| 2616 | |
| 2617 | // Check that the argument is a string literal. |
| 2618 | StringRef TypeStr; |
| 2619 | SourceLocation LiteralLoc; |
| 2620 | if (!S.checkStringLiteralArgumentAttr(AL, 0, TypeStr, &LiteralLoc)) |
| 2621 | return; |
| 2622 | |
| 2623 | VisibilityAttr::VisibilityType type; |
| 2624 | if (!VisibilityAttr::ConvertStrToVisibilityType(TypeStr, type)) { |
| 2625 | S.Diag(LiteralLoc, diag::warn_attribute_type_not_supported) << AL |
| 2626 | << TypeStr; |
| 2627 | return; |
| 2628 | } |
| 2629 | |
| 2630 | // Complain about attempts to use protected visibility on targets |
| 2631 | // (like Darwin) that don't support it. |
| 2632 | if (type == VisibilityAttr::Protected && |
| 2633 | !S.Context.getTargetInfo().hasProtectedVisibility()) { |
| 2634 | S.Diag(AL.getLoc(), diag::warn_attribute_protected_visibility); |
| 2635 | type = VisibilityAttr::Default; |
| 2636 | } |
| 2637 | |
| 2638 | unsigned Index = AL.getAttributeSpellingListIndex(); |
| 2639 | Attr *newAttr; |
| 2640 | if (isTypeVisibility) { |
| 2641 | newAttr = S.mergeTypeVisibilityAttr(D, AL.getRange(), |
| 2642 | (TypeVisibilityAttr::VisibilityType) type, |
| 2643 | Index); |
| 2644 | } else { |
| 2645 | newAttr = S.mergeVisibilityAttr(D, AL.getRange(), type, Index); |
| 2646 | } |
| 2647 | if (newAttr) |
| 2648 | D->addAttr(newAttr); |
| 2649 | } |
| 2650 | |
| 2651 | static void handleObjCMethodFamilyAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 2652 | const auto *M = cast<ObjCMethodDecl>(D); |
| 2653 | if (!AL.isArgIdent(0)) { |
| 2654 | S.Diag(AL.getLoc(), diag::err_attribute_argument_n_type) |
| 2655 | << AL << 1 << AANT_ArgumentIdentifier; |
| 2656 | return; |
| 2657 | } |
| 2658 | |
| 2659 | IdentifierLoc *IL = AL.getArgAsIdent(0); |
| 2660 | ObjCMethodFamilyAttr::FamilyKind F; |
| 2661 | if (!ObjCMethodFamilyAttr::ConvertStrToFamilyKind(IL->Ident->getName(), F)) { |
| 2662 | S.Diag(IL->Loc, diag::warn_attribute_type_not_supported) << AL << IL->Ident; |
| 2663 | return; |
| 2664 | } |
| 2665 | |
| 2666 | if (F == ObjCMethodFamilyAttr::OMF_init && |
| 2667 | !M->getReturnType()->isObjCObjectPointerType()) { |
| 2668 | S.Diag(M->getLocation(), diag::err_init_method_bad_return_type) |
| 2669 | << M->getReturnType(); |
| 2670 | // Ignore the attribute. |
| 2671 | return; |
| 2672 | } |
| 2673 | |
| 2674 | D->addAttr(new (S.Context) ObjCMethodFamilyAttr( |
| 2675 | AL.getRange(), S.Context, F, AL.getAttributeSpellingListIndex())); |
| 2676 | } |
| 2677 | |
| 2678 | static void handleObjCNSObject(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 2679 | if (const auto *TD = dyn_cast<TypedefNameDecl>(D)) { |
| 2680 | QualType T = TD->getUnderlyingType(); |
| 2681 | if (!T->isCARCBridgableType()) { |
| 2682 | S.Diag(TD->getLocation(), diag::err_nsobject_attribute); |
| 2683 | return; |
| 2684 | } |
| 2685 | } |
| 2686 | else if (const auto *PD = dyn_cast<ObjCPropertyDecl>(D)) { |
| 2687 | QualType T = PD->getType(); |
| 2688 | if (!T->isCARCBridgableType()) { |
| 2689 | S.Diag(PD->getLocation(), diag::err_nsobject_attribute); |
| 2690 | return; |
| 2691 | } |
| 2692 | } |
| 2693 | else { |
| 2694 | // It is okay to include this attribute on properties, e.g.: |
| 2695 | // |
| 2696 | // @property (retain, nonatomic) struct Bork *Q __attribute__((NSObject)); |
| 2697 | // |
| 2698 | // In this case it follows tradition and suppresses an error in the above |
| 2699 | // case. |
| 2700 | S.Diag(D->getLocation(), diag::warn_nsobject_attribute); |
| 2701 | } |
| 2702 | D->addAttr(::new (S.Context) |
| 2703 | ObjCNSObjectAttr(AL.getRange(), S.Context, |
| 2704 | AL.getAttributeSpellingListIndex())); |
| 2705 | } |
| 2706 | |
| 2707 | static void handleObjCIndependentClass(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 2708 | if (const auto *TD = dyn_cast<TypedefNameDecl>(D)) { |
| 2709 | QualType T = TD->getUnderlyingType(); |
| 2710 | if (!T->isObjCObjectPointerType()) { |
| 2711 | S.Diag(TD->getLocation(), diag::warn_ptr_independentclass_attribute); |
| 2712 | return; |
| 2713 | } |
| 2714 | } else { |
| 2715 | S.Diag(D->getLocation(), diag::warn_independentclass_attribute); |
| 2716 | return; |
| 2717 | } |
| 2718 | D->addAttr(::new (S.Context) |
| 2719 | ObjCIndependentClassAttr(AL.getRange(), S.Context, |
| 2720 | AL.getAttributeSpellingListIndex())); |
| 2721 | } |
| 2722 | |
| 2723 | static void handleBlocksAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 2724 | if (!AL.isArgIdent(0)) { |
| 2725 | S.Diag(AL.getLoc(), diag::err_attribute_argument_n_type) |
| 2726 | << AL << 1 << AANT_ArgumentIdentifier; |
| 2727 | return; |
| 2728 | } |
| 2729 | |
| 2730 | IdentifierInfo *II = AL.getArgAsIdent(0)->Ident; |
| 2731 | BlocksAttr::BlockType type; |
| 2732 | if (!BlocksAttr::ConvertStrToBlockType(II->getName(), type)) { |
| 2733 | S.Diag(AL.getLoc(), diag::warn_attribute_type_not_supported) << AL << II; |
| 2734 | return; |
| 2735 | } |
| 2736 | |
| 2737 | D->addAttr(::new (S.Context) |
| 2738 | BlocksAttr(AL.getRange(), S.Context, type, |
| 2739 | AL.getAttributeSpellingListIndex())); |
| 2740 | } |
| 2741 | |
| 2742 | static void handleSentinelAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 2743 | unsigned sentinel = (unsigned)SentinelAttr::DefaultSentinel; |
| 2744 | if (AL.getNumArgs() > 0) { |
| 2745 | Expr *E = AL.getArgAsExpr(0); |
| 2746 | llvm::APSInt Idx(32); |
| 2747 | if (E->isTypeDependent() || E->isValueDependent() || |
| 2748 | !E->isIntegerConstantExpr(Idx, S.Context)) { |
| 2749 | S.Diag(AL.getLoc(), diag::err_attribute_argument_n_type) |
| 2750 | << AL << 1 << AANT_ArgumentIntegerConstant << E->getSourceRange(); |
| 2751 | return; |
| 2752 | } |
| 2753 | |
| 2754 | if (Idx.isSigned() && Idx.isNegative()) { |
| 2755 | S.Diag(AL.getLoc(), diag::err_attribute_sentinel_less_than_zero) |
| 2756 | << E->getSourceRange(); |
| 2757 | return; |
| 2758 | } |
| 2759 | |
| 2760 | sentinel = Idx.getZExtValue(); |
| 2761 | } |
| 2762 | |
| 2763 | unsigned nullPos = (unsigned)SentinelAttr::DefaultNullPos; |
| 2764 | if (AL.getNumArgs() > 1) { |
| 2765 | Expr *E = AL.getArgAsExpr(1); |
| 2766 | llvm::APSInt Idx(32); |
| 2767 | if (E->isTypeDependent() || E->isValueDependent() || |
| 2768 | !E->isIntegerConstantExpr(Idx, S.Context)) { |
| 2769 | S.Diag(AL.getLoc(), diag::err_attribute_argument_n_type) |
| 2770 | << AL << 2 << AANT_ArgumentIntegerConstant << E->getSourceRange(); |
| 2771 | return; |
| 2772 | } |
| 2773 | nullPos = Idx.getZExtValue(); |
| 2774 | |
| 2775 | if ((Idx.isSigned() && Idx.isNegative()) || nullPos > 1) { |
| 2776 | // FIXME: This error message could be improved, it would be nice |
| 2777 | // to say what the bounds actually are. |
| 2778 | S.Diag(AL.getLoc(), diag::err_attribute_sentinel_not_zero_or_one) |
| 2779 | << E->getSourceRange(); |
| 2780 | return; |
| 2781 | } |
| 2782 | } |
| 2783 | |
| 2784 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) { |
| 2785 | const FunctionType *FT = FD->getType()->castAs<FunctionType>(); |
| 2786 | if (isa<FunctionNoProtoType>(FT)) { |
| 2787 | S.Diag(AL.getLoc(), diag::warn_attribute_sentinel_named_arguments); |
| 2788 | return; |
| 2789 | } |
| 2790 | |
| 2791 | if (!cast<FunctionProtoType>(FT)->isVariadic()) { |
| 2792 | S.Diag(AL.getLoc(), diag::warn_attribute_sentinel_not_variadic) << 0; |
| 2793 | return; |
| 2794 | } |
| 2795 | } else if (const auto *MD = dyn_cast<ObjCMethodDecl>(D)) { |
| 2796 | if (!MD->isVariadic()) { |
| 2797 | S.Diag(AL.getLoc(), diag::warn_attribute_sentinel_not_variadic) << 0; |
| 2798 | return; |
| 2799 | } |
| 2800 | } else if (const auto *BD = dyn_cast<BlockDecl>(D)) { |
| 2801 | if (!BD->isVariadic()) { |
| 2802 | S.Diag(AL.getLoc(), diag::warn_attribute_sentinel_not_variadic) << 1; |
| 2803 | return; |
| 2804 | } |
| 2805 | } else if (const auto *V = dyn_cast<VarDecl>(D)) { |
| 2806 | QualType Ty = V->getType(); |
| 2807 | if (Ty->isBlockPointerType() || Ty->isFunctionPointerType()) { |
| 2808 | const FunctionType *FT = Ty->isFunctionPointerType() |
| 2809 | ? D->getFunctionType() |
| 2810 | : Ty->getAs<BlockPointerType>()->getPointeeType()->getAs<FunctionType>(); |
| 2811 | if (!cast<FunctionProtoType>(FT)->isVariadic()) { |
| 2812 | int m = Ty->isFunctionPointerType() ? 0 : 1; |
| 2813 | S.Diag(AL.getLoc(), diag::warn_attribute_sentinel_not_variadic) << m; |
| 2814 | return; |
| 2815 | } |
| 2816 | } else { |
| 2817 | S.Diag(AL.getLoc(), diag::warn_attribute_wrong_decl_type) |
| 2818 | << AL << ExpectedFunctionMethodOrBlock; |
| 2819 | return; |
| 2820 | } |
| 2821 | } else { |
| 2822 | S.Diag(AL.getLoc(), diag::warn_attribute_wrong_decl_type) |
| 2823 | << AL << ExpectedFunctionMethodOrBlock; |
| 2824 | return; |
| 2825 | } |
| 2826 | D->addAttr(::new (S.Context) |
| 2827 | SentinelAttr(AL.getRange(), S.Context, sentinel, nullPos, |
| 2828 | AL.getAttributeSpellingListIndex())); |
| 2829 | } |
| 2830 | |
| 2831 | static void handleWarnUnusedResult(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 2832 | if (D->getFunctionType() && |
| 2833 | D->getFunctionType()->getReturnType()->isVoidType()) { |
| 2834 | S.Diag(AL.getLoc(), diag::warn_attribute_void_function_method) << AL << 0; |
| 2835 | return; |
| 2836 | } |
| 2837 | if (const auto *MD = dyn_cast<ObjCMethodDecl>(D)) |
| 2838 | if (MD->getReturnType()->isVoidType()) { |
| 2839 | S.Diag(AL.getLoc(), diag::warn_attribute_void_function_method) << AL << 1; |
| 2840 | return; |
| 2841 | } |
| 2842 | |
| 2843 | // If this is spelled as the standard C++17 attribute, but not in C++17, warn |
| 2844 | // about using it as an extension. |
| 2845 | if (!S.getLangOpts().CPlusPlus17 && AL.isCXX11Attribute() && |
| 2846 | !AL.getScopeName()) |
| 2847 | S.Diag(AL.getLoc(), diag::ext_cxx17_attr) << AL; |
| 2848 | |
| 2849 | D->addAttr(::new (S.Context) |
| 2850 | WarnUnusedResultAttr(AL.getRange(), S.Context, |
| 2851 | AL.getAttributeSpellingListIndex())); |
| 2852 | } |
| 2853 | |
| 2854 | static void handleWeakImportAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 2855 | // weak_import only applies to variable & function declarations. |
| 2856 | bool isDef = false; |
| 2857 | if (!D->canBeWeakImported(isDef)) { |
| 2858 | if (isDef) |
| 2859 | S.Diag(AL.getLoc(), diag::warn_attribute_invalid_on_definition) |
| 2860 | << "weak_import"; |
| 2861 | else if (isa<ObjCPropertyDecl>(D) || isa<ObjCMethodDecl>(D) || |
| 2862 | (S.Context.getTargetInfo().getTriple().isOSDarwin() && |
| 2863 | (isa<ObjCInterfaceDecl>(D) || isa<EnumDecl>(D)))) { |
| 2864 | // Nothing to warn about here. |
| 2865 | } else |
| 2866 | S.Diag(AL.getLoc(), diag::warn_attribute_wrong_decl_type) |
| 2867 | << AL << ExpectedVariableOrFunction; |
| 2868 | |
| 2869 | return; |
| 2870 | } |
| 2871 | |
| 2872 | D->addAttr(::new (S.Context) |
| 2873 | WeakImportAttr(AL.getRange(), S.Context, |
| 2874 | AL.getAttributeSpellingListIndex())); |
| 2875 | } |
| 2876 | |
| 2877 | // Handles reqd_work_group_size and work_group_size_hint. |
| 2878 | template <typename WorkGroupAttr> |
| 2879 | static void handleWorkGroupSize(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 2880 | uint32_t WGSize[3]; |
| 2881 | for (unsigned i = 0; i < 3; ++i) { |
| 2882 | const Expr *E = AL.getArgAsExpr(i); |
| 2883 | if (!checkUInt32Argument(S, AL, E, WGSize[i], i, |
| 2884 | /*StrictlyUnsigned=*/true)) |
| 2885 | return; |
| 2886 | if (WGSize[i] == 0) { |
| 2887 | S.Diag(AL.getLoc(), diag::err_attribute_argument_is_zero) |
| 2888 | << AL << E->getSourceRange(); |
| 2889 | return; |
| 2890 | } |
| 2891 | } |
| 2892 | |
| 2893 | WorkGroupAttr *Existing = D->getAttr<WorkGroupAttr>(); |
| 2894 | if (Existing && !(Existing->getXDim() == WGSize[0] && |
| 2895 | Existing->getYDim() == WGSize[1] && |
| 2896 | Existing->getZDim() == WGSize[2])) |
| 2897 | S.Diag(AL.getLoc(), diag::warn_duplicate_attribute) << AL; |
| 2898 | |
| 2899 | D->addAttr(::new (S.Context) WorkGroupAttr(AL.getRange(), S.Context, |
| 2900 | WGSize[0], WGSize[1], WGSize[2], |
| 2901 | AL.getAttributeSpellingListIndex())); |
| 2902 | } |
| 2903 | |
| 2904 | // Handles intel_reqd_sub_group_size. |
| 2905 | static void handleSubGroupSize(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 2906 | uint32_t SGSize; |
| 2907 | const Expr *E = AL.getArgAsExpr(0); |
| 2908 | if (!checkUInt32Argument(S, AL, E, SGSize)) |
| 2909 | return; |
| 2910 | if (SGSize == 0) { |
| 2911 | S.Diag(AL.getLoc(), diag::err_attribute_argument_is_zero) |
| 2912 | << AL << E->getSourceRange(); |
| 2913 | return; |
| 2914 | } |
| 2915 | |
| 2916 | OpenCLIntelReqdSubGroupSizeAttr *Existing = |
| 2917 | D->getAttr<OpenCLIntelReqdSubGroupSizeAttr>(); |
| 2918 | if (Existing && Existing->getSubGroupSize() != SGSize) |
| 2919 | S.Diag(AL.getLoc(), diag::warn_duplicate_attribute) << AL; |
| 2920 | |
| 2921 | D->addAttr(::new (S.Context) OpenCLIntelReqdSubGroupSizeAttr( |
| 2922 | AL.getRange(), S.Context, SGSize, |
| 2923 | AL.getAttributeSpellingListIndex())); |
| 2924 | } |
| 2925 | |
| 2926 | static void handleVecTypeHint(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 2927 | if (!AL.hasParsedType()) { |
| 2928 | S.Diag(AL.getLoc(), diag::err_attribute_wrong_number_arguments) << AL << 1; |
| 2929 | return; |
| 2930 | } |
| 2931 | |
| 2932 | TypeSourceInfo *ParmTSI = nullptr; |
| 2933 | QualType ParmType = S.GetTypeFromParser(AL.getTypeArg(), &ParmTSI); |
| 2934 | assert(ParmTSI && "no type source info for attribute argument")((ParmTSI && "no type source info for attribute argument" ) ? static_cast<void> (0) : __assert_fail ("ParmTSI && \"no type source info for attribute argument\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 2934, __PRETTY_FUNCTION__)); |
| 2935 | |
| 2936 | if (!ParmType->isExtVectorType() && !ParmType->isFloatingType() && |
| 2937 | (ParmType->isBooleanType() || |
| 2938 | !ParmType->isIntegralType(S.getASTContext()))) { |
| 2939 | S.Diag(AL.getLoc(), diag::err_attribute_argument_vec_type_hint) |
| 2940 | << ParmType; |
| 2941 | return; |
| 2942 | } |
| 2943 | |
| 2944 | if (VecTypeHintAttr *A = D->getAttr<VecTypeHintAttr>()) { |
| 2945 | if (!S.Context.hasSameType(A->getTypeHint(), ParmType)) { |
| 2946 | S.Diag(AL.getLoc(), diag::warn_duplicate_attribute) << AL; |
| 2947 | return; |
| 2948 | } |
| 2949 | } |
| 2950 | |
| 2951 | D->addAttr(::new (S.Context) VecTypeHintAttr(AL.getLoc(), S.Context, |
| 2952 | ParmTSI, |
| 2953 | AL.getAttributeSpellingListIndex())); |
| 2954 | } |
| 2955 | |
| 2956 | SectionAttr *Sema::mergeSectionAttr(Decl *D, SourceRange Range, |
| 2957 | StringRef Name, |
| 2958 | unsigned AttrSpellingListIndex) { |
| 2959 | // Explicit or partial specializations do not inherit |
| 2960 | // the section attribute from the primary template. |
| 2961 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) { |
| 2962 | if (AttrSpellingListIndex == SectionAttr::Declspec_allocate && |
| 2963 | FD->isFunctionTemplateSpecialization()) |
| 2964 | return nullptr; |
| 2965 | } |
| 2966 | if (SectionAttr *ExistingAttr = D->getAttr<SectionAttr>()) { |
| 2967 | if (ExistingAttr->getName() == Name) |
| 2968 | return nullptr; |
| 2969 | Diag(ExistingAttr->getLocation(), diag::warn_mismatched_section) |
| 2970 | << 1 /*section*/; |
| 2971 | Diag(Range.getBegin(), diag::note_previous_attribute); |
| 2972 | return nullptr; |
| 2973 | } |
| 2974 | return ::new (Context) SectionAttr(Range, Context, Name, |
| 2975 | AttrSpellingListIndex); |
| 2976 | } |
| 2977 | |
| 2978 | bool Sema::checkSectionName(SourceLocation LiteralLoc, StringRef SecName) { |
| 2979 | std::string Error = Context.getTargetInfo().isValidSectionSpecifier(SecName); |
| 2980 | if (!Error.empty()) { |
| 2981 | Diag(LiteralLoc, diag::err_attribute_section_invalid_for_target) << Error |
| 2982 | << 1 /*'section'*/; |
| 2983 | return false; |
| 2984 | } |
| 2985 | return true; |
| 2986 | } |
| 2987 | |
| 2988 | static void handleSectionAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 2989 | // Make sure that there is a string literal as the sections's single |
| 2990 | // argument. |
| 2991 | StringRef Str; |
| 2992 | SourceLocation LiteralLoc; |
| 2993 | if (!S.checkStringLiteralArgumentAttr(AL, 0, Str, &LiteralLoc)) |
| 2994 | return; |
| 2995 | |
| 2996 | if (!S.checkSectionName(LiteralLoc, Str)) |
| 2997 | return; |
| 2998 | |
| 2999 | // If the target wants to validate the section specifier, make it happen. |
| 3000 | std::string Error = S.Context.getTargetInfo().isValidSectionSpecifier(Str); |
| 3001 | if (!Error.empty()) { |
| 3002 | S.Diag(LiteralLoc, diag::err_attribute_section_invalid_for_target) |
| 3003 | << Error; |
| 3004 | return; |
| 3005 | } |
| 3006 | |
| 3007 | unsigned Index = AL.getAttributeSpellingListIndex(); |
| 3008 | SectionAttr *NewAttr = S.mergeSectionAttr(D, AL.getRange(), Str, Index); |
| 3009 | if (NewAttr) |
| 3010 | D->addAttr(NewAttr); |
| 3011 | } |
| 3012 | |
| 3013 | static bool checkCodeSegName(Sema&S, SourceLocation LiteralLoc, StringRef CodeSegName) { |
| 3014 | std::string Error = S.Context.getTargetInfo().isValidSectionSpecifier(CodeSegName); |
| 3015 | if (!Error.empty()) { |
| 3016 | S.Diag(LiteralLoc, diag::err_attribute_section_invalid_for_target) << Error |
| 3017 | << 0 /*'code-seg'*/; |
| 3018 | return false; |
| 3019 | } |
| 3020 | return true; |
| 3021 | } |
| 3022 | |
| 3023 | CodeSegAttr *Sema::mergeCodeSegAttr(Decl *D, SourceRange Range, |
| 3024 | StringRef Name, |
| 3025 | unsigned AttrSpellingListIndex) { |
| 3026 | // Explicit or partial specializations do not inherit |
| 3027 | // the code_seg attribute from the primary template. |
| 3028 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) { |
| 3029 | if (FD->isFunctionTemplateSpecialization()) |
| 3030 | return nullptr; |
| 3031 | } |
| 3032 | if (const auto *ExistingAttr = D->getAttr<CodeSegAttr>()) { |
| 3033 | if (ExistingAttr->getName() == Name) |
| 3034 | return nullptr; |
| 3035 | Diag(ExistingAttr->getLocation(), diag::warn_mismatched_section) |
| 3036 | << 0 /*codeseg*/; |
| 3037 | Diag(Range.getBegin(), diag::note_previous_attribute); |
| 3038 | return nullptr; |
| 3039 | } |
| 3040 | return ::new (Context) CodeSegAttr(Range, Context, Name, |
| 3041 | AttrSpellingListIndex); |
| 3042 | } |
| 3043 | |
| 3044 | static void handleCodeSegAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 3045 | StringRef Str; |
| 3046 | SourceLocation LiteralLoc; |
| 3047 | if (!S.checkStringLiteralArgumentAttr(AL, 0, Str, &LiteralLoc)) |
| 3048 | return; |
| 3049 | if (!checkCodeSegName(S, LiteralLoc, Str)) |
| 3050 | return; |
| 3051 | if (const auto *ExistingAttr = D->getAttr<CodeSegAttr>()) { |
| 3052 | if (!ExistingAttr->isImplicit()) { |
| 3053 | S.Diag(AL.getLoc(), |
| 3054 | ExistingAttr->getName() == Str |
| 3055 | ? diag::warn_duplicate_codeseg_attribute |
| 3056 | : diag::err_conflicting_codeseg_attribute); |
| 3057 | return; |
| 3058 | } |
| 3059 | D->dropAttr<CodeSegAttr>(); |
| 3060 | } |
| 3061 | if (CodeSegAttr *CSA = S.mergeCodeSegAttr(D, AL.getRange(), Str, |
| 3062 | AL.getAttributeSpellingListIndex())) |
| 3063 | D->addAttr(CSA); |
| 3064 | } |
| 3065 | |
| 3066 | // Check for things we'd like to warn about. Multiversioning issues are |
| 3067 | // handled later in the process, once we know how many exist. |
| 3068 | bool Sema::checkTargetAttr(SourceLocation LiteralLoc, StringRef AttrStr) { |
| 3069 | enum FirstParam { Unsupported, Duplicate }; |
| 3070 | enum SecondParam { None, Architecture }; |
| 3071 | for (auto Str : {"tune=", "fpmath="}) |
| 3072 | if (AttrStr.find(Str) != StringRef::npos) |
| 3073 | return Diag(LiteralLoc, diag::warn_unsupported_target_attribute) |
| 3074 | << Unsupported << None << Str; |
| 3075 | |
| 3076 | TargetAttr::ParsedTargetAttr ParsedAttrs = TargetAttr::parse(AttrStr); |
| 3077 | |
| 3078 | if (!ParsedAttrs.Architecture.empty() && |
| 3079 | !Context.getTargetInfo().isValidCPUName(ParsedAttrs.Architecture)) |
| 3080 | return Diag(LiteralLoc, diag::warn_unsupported_target_attribute) |
| 3081 | << Unsupported << Architecture << ParsedAttrs.Architecture; |
| 3082 | |
| 3083 | if (ParsedAttrs.DuplicateArchitecture) |
| 3084 | return Diag(LiteralLoc, diag::warn_unsupported_target_attribute) |
| 3085 | << Duplicate << None << "arch="; |
| 3086 | |
| 3087 | for (const auto &Feature : ParsedAttrs.Features) { |
| 3088 | auto CurFeature = StringRef(Feature).drop_front(); // remove + or -. |
| 3089 | if (!Context.getTargetInfo().isValidFeatureName(CurFeature)) |
| 3090 | return Diag(LiteralLoc, diag::warn_unsupported_target_attribute) |
| 3091 | << Unsupported << None << CurFeature; |
| 3092 | } |
| 3093 | |
| 3094 | return false; |
| 3095 | } |
| 3096 | |
| 3097 | static void handleTargetAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 3098 | StringRef Str; |
| 3099 | SourceLocation LiteralLoc; |
| 3100 | if (!S.checkStringLiteralArgumentAttr(AL, 0, Str, &LiteralLoc) || |
| 3101 | S.checkTargetAttr(LiteralLoc, Str)) |
| 3102 | return; |
| 3103 | |
| 3104 | unsigned Index = AL.getAttributeSpellingListIndex(); |
| 3105 | TargetAttr *NewAttr = |
| 3106 | ::new (S.Context) TargetAttr(AL.getRange(), S.Context, Str, Index); |
| 3107 | D->addAttr(NewAttr); |
| 3108 | } |
| 3109 | |
| 3110 | static void handleMinVectorWidthAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 3111 | Expr *E = AL.getArgAsExpr(0); |
| 3112 | uint32_t VecWidth; |
| 3113 | if (!checkUInt32Argument(S, AL, E, VecWidth)) { |
| 3114 | AL.setInvalid(); |
| 3115 | return; |
| 3116 | } |
| 3117 | |
| 3118 | MinVectorWidthAttr *Existing = D->getAttr<MinVectorWidthAttr>(); |
| 3119 | if (Existing && Existing->getVectorWidth() != VecWidth) { |
| 3120 | S.Diag(AL.getLoc(), diag::warn_duplicate_attribute) << AL; |
| 3121 | return; |
| 3122 | } |
| 3123 | |
| 3124 | D->addAttr(::new (S.Context) |
| 3125 | MinVectorWidthAttr(AL.getRange(), S.Context, VecWidth, |
| 3126 | AL.getAttributeSpellingListIndex())); |
| 3127 | } |
| 3128 | |
| 3129 | static void handleCleanupAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 3130 | Expr *E = AL.getArgAsExpr(0); |
| 3131 | SourceLocation Loc = E->getExprLoc(); |
| 3132 | FunctionDecl *FD = nullptr; |
| 3133 | DeclarationNameInfo NI; |
| 3134 | |
| 3135 | // gcc only allows for simple identifiers. Since we support more than gcc, we |
| 3136 | // will warn the user. |
| 3137 | if (auto *DRE = dyn_cast<DeclRefExpr>(E)) { |
| 3138 | if (DRE->hasQualifier()) |
| 3139 | S.Diag(Loc, diag::warn_cleanup_ext); |
| 3140 | FD = dyn_cast<FunctionDecl>(DRE->getDecl()); |
| 3141 | NI = DRE->getNameInfo(); |
| 3142 | if (!FD) { |
| 3143 | S.Diag(Loc, diag::err_attribute_cleanup_arg_not_function) << 1 |
| 3144 | << NI.getName(); |
| 3145 | return; |
| 3146 | } |
| 3147 | } else if (auto *ULE = dyn_cast<UnresolvedLookupExpr>(E)) { |
| 3148 | if (ULE->hasExplicitTemplateArgs()) |
| 3149 | S.Diag(Loc, diag::warn_cleanup_ext); |
| 3150 | FD = S.ResolveSingleFunctionTemplateSpecialization(ULE, true); |
| 3151 | NI = ULE->getNameInfo(); |
| 3152 | if (!FD) { |
| 3153 | S.Diag(Loc, diag::err_attribute_cleanup_arg_not_function) << 2 |
| 3154 | << NI.getName(); |
| 3155 | if (ULE->getType() == S.Context.OverloadTy) |
| 3156 | S.NoteAllOverloadCandidates(ULE); |
| 3157 | return; |
| 3158 | } |
| 3159 | } else { |
| 3160 | S.Diag(Loc, diag::err_attribute_cleanup_arg_not_function) << 0; |
| 3161 | return; |
| 3162 | } |
| 3163 | |
| 3164 | if (FD->getNumParams() != 1) { |
| 3165 | S.Diag(Loc, diag::err_attribute_cleanup_func_must_take_one_arg) |
| 3166 | << NI.getName(); |
| 3167 | return; |
| 3168 | } |
| 3169 | |
| 3170 | // We're currently more strict than GCC about what function types we accept. |
| 3171 | // If this ever proves to be a problem it should be easy to fix. |
| 3172 | QualType Ty = S.Context.getPointerType(cast<VarDecl>(D)->getType()); |
| 3173 | QualType ParamTy = FD->getParamDecl(0)->getType(); |
| 3174 | if (S.CheckAssignmentConstraints(FD->getParamDecl(0)->getLocation(), |
| 3175 | ParamTy, Ty) != Sema::Compatible) { |
| 3176 | S.Diag(Loc, diag::err_attribute_cleanup_func_arg_incompatible_type) |
| 3177 | << NI.getName() << ParamTy << Ty; |
| 3178 | return; |
| 3179 | } |
| 3180 | |
| 3181 | D->addAttr(::new (S.Context) |
| 3182 | CleanupAttr(AL.getRange(), S.Context, FD, |
| 3183 | AL.getAttributeSpellingListIndex())); |
| 3184 | } |
| 3185 | |
| 3186 | static void handleEnumExtensibilityAttr(Sema &S, Decl *D, |
| 3187 | const ParsedAttr &AL) { |
| 3188 | if (!AL.isArgIdent(0)) { |
| 3189 | S.Diag(AL.getLoc(), diag::err_attribute_argument_n_type) |
| 3190 | << AL << 0 << AANT_ArgumentIdentifier; |
| 3191 | return; |
| 3192 | } |
| 3193 | |
| 3194 | EnumExtensibilityAttr::Kind ExtensibilityKind; |
| 3195 | IdentifierInfo *II = AL.getArgAsIdent(0)->Ident; |
| 3196 | if (!EnumExtensibilityAttr::ConvertStrToKind(II->getName(), |
| 3197 | ExtensibilityKind)) { |
| 3198 | S.Diag(AL.getLoc(), diag::warn_attribute_type_not_supported) << AL << II; |
| 3199 | return; |
| 3200 | } |
| 3201 | |
| 3202 | D->addAttr(::new (S.Context) EnumExtensibilityAttr( |
| 3203 | AL.getRange(), S.Context, ExtensibilityKind, |
| 3204 | AL.getAttributeSpellingListIndex())); |
| 3205 | } |
| 3206 | |
| 3207 | /// Handle __attribute__((format_arg((idx)))) attribute based on |
| 3208 | /// http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html |
| 3209 | static void handleFormatArgAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 3210 | Expr *IdxExpr = AL.getArgAsExpr(0); |
| 3211 | ParamIdx Idx; |
| 3212 | if (!checkFunctionOrMethodParameterIndex(S, D, AL, 1, IdxExpr, Idx)) |
| 3213 | return; |
| 3214 | |
| 3215 | // Make sure the format string is really a string. |
| 3216 | QualType Ty = getFunctionOrMethodParamType(D, Idx.getASTIndex()); |
| 3217 | |
| 3218 | bool NotNSStringTy = !isNSStringType(Ty, S.Context); |
| 3219 | if (NotNSStringTy && |
| 3220 | !isCFStringType(Ty, S.Context) && |
| 3221 | (!Ty->isPointerType() || |
| 3222 | !Ty->getAs<PointerType>()->getPointeeType()->isCharType())) { |
| 3223 | S.Diag(AL.getLoc(), diag::err_format_attribute_not) |
| 3224 | << "a string type" << IdxExpr->getSourceRange() |
| 3225 | << getFunctionOrMethodParamRange(D, 0); |
| 3226 | return; |
| 3227 | } |
| 3228 | Ty = getFunctionOrMethodResultType(D); |
| 3229 | if (!isNSStringType(Ty, S.Context) && |
| 3230 | !isCFStringType(Ty, S.Context) && |
| 3231 | (!Ty->isPointerType() || |
| 3232 | !Ty->getAs<PointerType>()->getPointeeType()->isCharType())) { |
| 3233 | S.Diag(AL.getLoc(), diag::err_format_attribute_result_not) |
| 3234 | << (NotNSStringTy ? "string type" : "NSString") |
| 3235 | << IdxExpr->getSourceRange() << getFunctionOrMethodParamRange(D, 0); |
| 3236 | return; |
| 3237 | } |
| 3238 | |
| 3239 | D->addAttr(::new (S.Context) FormatArgAttr( |
| 3240 | AL.getRange(), S.Context, Idx, AL.getAttributeSpellingListIndex())); |
| 3241 | } |
| 3242 | |
| 3243 | enum FormatAttrKind { |
| 3244 | CFStringFormat, |
| 3245 | NSStringFormat, |
| 3246 | StrftimeFormat, |
| 3247 | SupportedFormat, |
| 3248 | IgnoredFormat, |
| 3249 | InvalidFormat |
| 3250 | }; |
| 3251 | |
| 3252 | /// getFormatAttrKind - Map from format attribute names to supported format |
| 3253 | /// types. |
| 3254 | static FormatAttrKind getFormatAttrKind(StringRef Format) { |
| 3255 | return llvm::StringSwitch<FormatAttrKind>(Format) |
| 3256 | // Check for formats that get handled specially. |
| 3257 | .Case("NSString", NSStringFormat) |
| 3258 | .Case("CFString", CFStringFormat) |
| 3259 | .Case("strftime", StrftimeFormat) |
| 3260 | |
| 3261 | // Otherwise, check for supported formats. |
| 3262 | .Cases("scanf", "printf", "printf0", "strfmon", SupportedFormat) |
| 3263 | .Cases("cmn_err", "vcmn_err", "zcmn_err", SupportedFormat) |
| 3264 | .Case("kprintf", SupportedFormat) // OpenBSD. |
| 3265 | .Case("freebsd_kprintf", SupportedFormat) // FreeBSD. |
| 3266 | .Case("os_trace", SupportedFormat) |
| 3267 | .Case("os_log", SupportedFormat) |
| 3268 | |
| 3269 | .Cases("gcc_diag", "gcc_cdiag", "gcc_cxxdiag", "gcc_tdiag", IgnoredFormat) |
| 3270 | .Default(InvalidFormat); |
| 3271 | } |
| 3272 | |
| 3273 | /// Handle __attribute__((init_priority(priority))) attributes based on |
| 3274 | /// http://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Attributes.html |
| 3275 | static void handleInitPriorityAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 3276 | if (!S.getLangOpts().CPlusPlus) { |
| 3277 | S.Diag(AL.getLoc(), diag::warn_attribute_ignored) << AL; |
| 3278 | return; |
| 3279 | } |
| 3280 | |
| 3281 | if (S.getCurFunctionOrMethodDecl()) { |
| 3282 | S.Diag(AL.getLoc(), diag::err_init_priority_object_attr); |
| 3283 | AL.setInvalid(); |
| 3284 | return; |
| 3285 | } |
| 3286 | QualType T = cast<VarDecl>(D)->getType(); |
| 3287 | if (S.Context.getAsArrayType(T)) |
| 3288 | T = S.Context.getBaseElementType(T); |
| 3289 | if (!T->getAs<RecordType>()) { |
| 3290 | S.Diag(AL.getLoc(), diag::err_init_priority_object_attr); |
| 3291 | AL.setInvalid(); |
| 3292 | return; |
| 3293 | } |
| 3294 | |
| 3295 | Expr *E = AL.getArgAsExpr(0); |
| 3296 | uint32_t prioritynum; |
| 3297 | if (!checkUInt32Argument(S, AL, E, prioritynum)) { |
| 3298 | AL.setInvalid(); |
| 3299 | return; |
| 3300 | } |
| 3301 | |
| 3302 | if (prioritynum < 101 || prioritynum > 65535) { |
| 3303 | S.Diag(AL.getLoc(), diag::err_attribute_argument_outof_range) |
| 3304 | << E->getSourceRange() << AL << 101 << 65535; |
| 3305 | AL.setInvalid(); |
| 3306 | return; |
| 3307 | } |
| 3308 | D->addAttr(::new (S.Context) |
| 3309 | InitPriorityAttr(AL.getRange(), S.Context, prioritynum, |
| 3310 | AL.getAttributeSpellingListIndex())); |
| 3311 | } |
| 3312 | |
| 3313 | FormatAttr *Sema::mergeFormatAttr(Decl *D, SourceRange Range, |
| 3314 | IdentifierInfo *Format, int FormatIdx, |
| 3315 | int FirstArg, |
| 3316 | unsigned AttrSpellingListIndex) { |
| 3317 | // Check whether we already have an equivalent format attribute. |
| 3318 | for (auto *F : D->specific_attrs<FormatAttr>()) { |
| 3319 | if (F->getType() == Format && |
| 3320 | F->getFormatIdx() == FormatIdx && |
| 3321 | F->getFirstArg() == FirstArg) { |
| 3322 | // If we don't have a valid location for this attribute, adopt the |
| 3323 | // location. |
| 3324 | if (F->getLocation().isInvalid()) |
| 3325 | F->setRange(Range); |
| 3326 | return nullptr; |
| 3327 | } |
| 3328 | } |
| 3329 | |
| 3330 | return ::new (Context) FormatAttr(Range, Context, Format, FormatIdx, |
| 3331 | FirstArg, AttrSpellingListIndex); |
| 3332 | } |
| 3333 | |
| 3334 | /// Handle __attribute__((format(type,idx,firstarg))) attributes based on |
| 3335 | /// http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html |
| 3336 | static void handleFormatAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 3337 | if (!AL.isArgIdent(0)) { |
| 3338 | S.Diag(AL.getLoc(), diag::err_attribute_argument_n_type) |
| 3339 | << AL << 1 << AANT_ArgumentIdentifier; |
| 3340 | return; |
| 3341 | } |
| 3342 | |
| 3343 | // In C++ the implicit 'this' function parameter also counts, and they are |
| 3344 | // counted from one. |
| 3345 | bool HasImplicitThisParam = isInstanceMethod(D); |
| 3346 | unsigned NumArgs = getFunctionOrMethodNumParams(D) + HasImplicitThisParam; |
| 3347 | |
| 3348 | IdentifierInfo *II = AL.getArgAsIdent(0)->Ident; |
| 3349 | StringRef Format = II->getName(); |
| 3350 | |
| 3351 | if (normalizeName(Format)) { |
| 3352 | // If we've modified the string name, we need a new identifier for it. |
| 3353 | II = &S.Context.Idents.get(Format); |
| 3354 | } |
| 3355 | |
| 3356 | // Check for supported formats. |
| 3357 | FormatAttrKind Kind = getFormatAttrKind(Format); |
| 3358 | |
| 3359 | if (Kind == IgnoredFormat) |
| 3360 | return; |
| 3361 | |
| 3362 | if (Kind == InvalidFormat) { |
| 3363 | S.Diag(AL.getLoc(), diag::warn_attribute_type_not_supported) |
| 3364 | << AL << II->getName(); |
| 3365 | return; |
| 3366 | } |
| 3367 | |
| 3368 | // checks for the 2nd argument |
| 3369 | Expr *IdxExpr = AL.getArgAsExpr(1); |
| 3370 | uint32_t Idx; |
| 3371 | if (!checkUInt32Argument(S, AL, IdxExpr, Idx, 2)) |
| 3372 | return; |
| 3373 | |
| 3374 | if (Idx < 1 || Idx > NumArgs) { |
| 3375 | S.Diag(AL.getLoc(), diag::err_attribute_argument_out_of_bounds) |
| 3376 | << AL << 2 << IdxExpr->getSourceRange(); |
| 3377 | return; |
| 3378 | } |
| 3379 | |
| 3380 | // FIXME: Do we need to bounds check? |
| 3381 | unsigned ArgIdx = Idx - 1; |
| 3382 | |
| 3383 | if (HasImplicitThisParam) { |
| 3384 | if (ArgIdx == 0) { |
| 3385 | S.Diag(AL.getLoc(), |
| 3386 | diag::err_format_attribute_implicit_this_format_string) |
| 3387 | << IdxExpr->getSourceRange(); |
| 3388 | return; |
| 3389 | } |
| 3390 | ArgIdx--; |
| 3391 | } |
| 3392 | |
| 3393 | // make sure the format string is really a string |
| 3394 | QualType Ty = getFunctionOrMethodParamType(D, ArgIdx); |
| 3395 | |
| 3396 | if (Kind == CFStringFormat) { |
| 3397 | if (!isCFStringType(Ty, S.Context)) { |
| 3398 | S.Diag(AL.getLoc(), diag::err_format_attribute_not) |
| 3399 | << "a CFString" << IdxExpr->getSourceRange() |
| 3400 | << getFunctionOrMethodParamRange(D, ArgIdx); |
| 3401 | return; |
| 3402 | } |
| 3403 | } else if (Kind == NSStringFormat) { |
| 3404 | // FIXME: do we need to check if the type is NSString*? What are the |
| 3405 | // semantics? |
| 3406 | if (!isNSStringType(Ty, S.Context)) { |
| 3407 | S.Diag(AL.getLoc(), diag::err_format_attribute_not) |
| 3408 | << "an NSString" << IdxExpr->getSourceRange() |
| 3409 | << getFunctionOrMethodParamRange(D, ArgIdx); |
| 3410 | return; |
| 3411 | } |
| 3412 | } else if (!Ty->isPointerType() || |
| 3413 | !Ty->getAs<PointerType>()->getPointeeType()->isCharType()) { |
| 3414 | S.Diag(AL.getLoc(), diag::err_format_attribute_not) |
| 3415 | << "a string type" << IdxExpr->getSourceRange() |
| 3416 | << getFunctionOrMethodParamRange(D, ArgIdx); |
| 3417 | return; |
| 3418 | } |
| 3419 | |
| 3420 | // check the 3rd argument |
| 3421 | Expr *FirstArgExpr = AL.getArgAsExpr(2); |
| 3422 | uint32_t FirstArg; |
| 3423 | if (!checkUInt32Argument(S, AL, FirstArgExpr, FirstArg, 3)) |
| 3424 | return; |
| 3425 | |
| 3426 | // check if the function is variadic if the 3rd argument non-zero |
| 3427 | if (FirstArg != 0) { |
| 3428 | if (isFunctionOrMethodVariadic(D)) { |
| 3429 | ++NumArgs; // +1 for ... |
| 3430 | } else { |
| 3431 | S.Diag(D->getLocation(), diag::err_format_attribute_requires_variadic); |
| 3432 | return; |
| 3433 | } |
| 3434 | } |
| 3435 | |
| 3436 | // strftime requires FirstArg to be 0 because it doesn't read from any |
| 3437 | // variable the input is just the current time + the format string. |
| 3438 | if (Kind == StrftimeFormat) { |
| 3439 | if (FirstArg != 0) { |
| 3440 | S.Diag(AL.getLoc(), diag::err_format_strftime_third_parameter) |
| 3441 | << FirstArgExpr->getSourceRange(); |
| 3442 | return; |
| 3443 | } |
| 3444 | // if 0 it disables parameter checking (to use with e.g. va_list) |
| 3445 | } else if (FirstArg != 0 && FirstArg != NumArgs) { |
| 3446 | S.Diag(AL.getLoc(), diag::err_attribute_argument_out_of_bounds) |
| 3447 | << AL << 3 << FirstArgExpr->getSourceRange(); |
| 3448 | return; |
| 3449 | } |
| 3450 | |
| 3451 | FormatAttr *NewAttr = S.mergeFormatAttr(D, AL.getRange(), II, |
| 3452 | Idx, FirstArg, |
| 3453 | AL.getAttributeSpellingListIndex()); |
| 3454 | if (NewAttr) |
| 3455 | D->addAttr(NewAttr); |
| 3456 | } |
| 3457 | |
| 3458 | static void handleTransparentUnionAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 3459 | // Try to find the underlying union declaration. |
| 3460 | RecordDecl *RD = nullptr; |
| 3461 | const auto *TD = dyn_cast<TypedefNameDecl>(D); |
| 3462 | if (TD && TD->getUnderlyingType()->isUnionType()) |
| 3463 | RD = TD->getUnderlyingType()->getAsUnionType()->getDecl(); |
| 3464 | else |
| 3465 | RD = dyn_cast<RecordDecl>(D); |
| 3466 | |
| 3467 | if (!RD || !RD->isUnion()) { |
| 3468 | S.Diag(AL.getLoc(), diag::warn_attribute_wrong_decl_type) << AL |
| 3469 | << ExpectedUnion; |
| 3470 | return; |
| 3471 | } |
| 3472 | |
| 3473 | if (!RD->isCompleteDefinition()) { |
| 3474 | if (!RD->isBeingDefined()) |
| 3475 | S.Diag(AL.getLoc(), |
| 3476 | diag::warn_transparent_union_attribute_not_definition); |
| 3477 | return; |
| 3478 | } |
| 3479 | |
| 3480 | RecordDecl::field_iterator Field = RD->field_begin(), |
| 3481 | FieldEnd = RD->field_end(); |
| 3482 | if (Field == FieldEnd) { |
| 3483 | S.Diag(AL.getLoc(), diag::warn_transparent_union_attribute_zero_fields); |
| 3484 | return; |
| 3485 | } |
| 3486 | |
| 3487 | FieldDecl *FirstField = *Field; |
| 3488 | QualType FirstType = FirstField->getType(); |
| 3489 | if (FirstType->hasFloatingRepresentation() || FirstType->isVectorType()) { |
| 3490 | S.Diag(FirstField->getLocation(), |
| 3491 | diag::warn_transparent_union_attribute_floating) |
| 3492 | << FirstType->isVectorType() << FirstType; |
| 3493 | return; |
| 3494 | } |
| 3495 | |
| 3496 | if (FirstType->isIncompleteType()) |
| 3497 | return; |
| 3498 | uint64_t FirstSize = S.Context.getTypeSize(FirstType); |
| 3499 | uint64_t FirstAlign = S.Context.getTypeAlign(FirstType); |
| 3500 | for (; Field != FieldEnd; ++Field) { |
| 3501 | QualType FieldType = Field->getType(); |
| 3502 | if (FieldType->isIncompleteType()) |
| 3503 | return; |
| 3504 | // FIXME: this isn't fully correct; we also need to test whether the |
| 3505 | // members of the union would all have the same calling convention as the |
| 3506 | // first member of the union. Checking just the size and alignment isn't |
| 3507 | // sufficient (consider structs passed on the stack instead of in registers |
| 3508 | // as an example). |
| 3509 | if (S.Context.getTypeSize(FieldType) != FirstSize || |
| 3510 | S.Context.getTypeAlign(FieldType) > FirstAlign) { |
| 3511 | // Warn if we drop the attribute. |
| 3512 | bool isSize = S.Context.getTypeSize(FieldType) != FirstSize; |
| 3513 | unsigned FieldBits = isSize? S.Context.getTypeSize(FieldType) |
| 3514 | : S.Context.getTypeAlign(FieldType); |
| 3515 | S.Diag(Field->getLocation(), |
| 3516 | diag::warn_transparent_union_attribute_field_size_align) |
| 3517 | << isSize << Field->getDeclName() << FieldBits; |
| 3518 | unsigned FirstBits = isSize? FirstSize : FirstAlign; |
| 3519 | S.Diag(FirstField->getLocation(), |
| 3520 | diag::note_transparent_union_first_field_size_align) |
| 3521 | << isSize << FirstBits; |
| 3522 | return; |
| 3523 | } |
| 3524 | } |
| 3525 | |
| 3526 | RD->addAttr(::new (S.Context) |
| 3527 | TransparentUnionAttr(AL.getRange(), S.Context, |
| 3528 | AL.getAttributeSpellingListIndex())); |
| 3529 | } |
| 3530 | |
| 3531 | static void handleAnnotateAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 3532 | // Make sure that there is a string literal as the annotation's single |
| 3533 | // argument. |
| 3534 | StringRef Str; |
| 3535 | if (!S.checkStringLiteralArgumentAttr(AL, 0, Str)) |
| 3536 | return; |
| 3537 | |
| 3538 | // Don't duplicate annotations that are already set. |
| 3539 | for (const auto *I : D->specific_attrs<AnnotateAttr>()) { |
| 3540 | if (I->getAnnotation() == Str) |
| 3541 | return; |
| 3542 | } |
| 3543 | |
| 3544 | D->addAttr(::new (S.Context) |
| 3545 | AnnotateAttr(AL.getRange(), S.Context, Str, |
| 3546 | AL.getAttributeSpellingListIndex())); |
| 3547 | } |
| 3548 | |
| 3549 | static void handleAlignValueAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 3550 | S.AddAlignValueAttr(AL.getRange(), D, AL.getArgAsExpr(0), |
| 3551 | AL.getAttributeSpellingListIndex()); |
| 3552 | } |
| 3553 | |
| 3554 | void Sema::AddAlignValueAttr(SourceRange AttrRange, Decl *D, Expr *E, |
| 3555 | unsigned SpellingListIndex) { |
| 3556 | AlignValueAttr TmpAttr(AttrRange, Context, E, SpellingListIndex); |
| 3557 | SourceLocation AttrLoc = AttrRange.getBegin(); |
| 3558 | |
| 3559 | QualType T; |
| 3560 | if (const auto *TD = dyn_cast<TypedefNameDecl>(D)) |
| 3561 | T = TD->getUnderlyingType(); |
| 3562 | else if (const auto *VD = dyn_cast<ValueDecl>(D)) |
| 3563 | T = VD->getType(); |
| 3564 | else |
| 3565 | llvm_unreachable("Unknown decl type for align_value")::llvm::llvm_unreachable_internal("Unknown decl type for align_value" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 3565); |
| 3566 | |
| 3567 | if (!T->isDependentType() && !T->isAnyPointerType() && |
| 3568 | !T->isReferenceType() && !T->isMemberPointerType()) { |
| 3569 | Diag(AttrLoc, diag::warn_attribute_pointer_or_reference_only) |
| 3570 | << &TmpAttr /*TmpAttr.getName()*/ << T << D->getSourceRange(); |
| 3571 | return; |
| 3572 | } |
| 3573 | |
| 3574 | if (!E->isValueDependent()) { |
| 3575 | llvm::APSInt Alignment; |
| 3576 | ExprResult ICE |
| 3577 | = VerifyIntegerConstantExpression(E, &Alignment, |
| 3578 | diag::err_align_value_attribute_argument_not_int, |
| 3579 | /*AllowFold*/ false); |
| 3580 | if (ICE.isInvalid()) |
| 3581 | return; |
| 3582 | |
| 3583 | if (!Alignment.isPowerOf2()) { |
| 3584 | Diag(AttrLoc, diag::err_alignment_not_power_of_two) |
| 3585 | << E->getSourceRange(); |
| 3586 | return; |
| 3587 | } |
| 3588 | |
| 3589 | D->addAttr(::new (Context) |
| 3590 | AlignValueAttr(AttrRange, Context, ICE.get(), |
| 3591 | SpellingListIndex)); |
| 3592 | return; |
| 3593 | } |
| 3594 | |
| 3595 | // Save dependent expressions in the AST to be instantiated. |
| 3596 | D->addAttr(::new (Context) AlignValueAttr(TmpAttr)); |
| 3597 | } |
| 3598 | |
| 3599 | static void handleAlignedAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 3600 | // check the attribute arguments. |
| 3601 | if (AL.getNumArgs() > 1) { |
| 3602 | S.Diag(AL.getLoc(), diag::err_attribute_wrong_number_arguments) << AL << 1; |
| 3603 | return; |
| 3604 | } |
| 3605 | |
| 3606 | if (AL.getNumArgs() == 0) { |
| 3607 | D->addAttr(::new (S.Context) AlignedAttr(AL.getRange(), S.Context, |
| 3608 | true, nullptr, AL.getAttributeSpellingListIndex())); |
| 3609 | return; |
| 3610 | } |
| 3611 | |
| 3612 | Expr *E = AL.getArgAsExpr(0); |
| 3613 | if (AL.isPackExpansion() && !E->containsUnexpandedParameterPack()) { |
| 3614 | S.Diag(AL.getEllipsisLoc(), |
| 3615 | diag::err_pack_expansion_without_parameter_packs); |
| 3616 | return; |
| 3617 | } |
| 3618 | |
| 3619 | if (!AL.isPackExpansion() && S.DiagnoseUnexpandedParameterPack(E)) |
| 3620 | return; |
| 3621 | |
| 3622 | S.AddAlignedAttr(AL.getRange(), D, E, AL.getAttributeSpellingListIndex(), |
| 3623 | AL.isPackExpansion()); |
| 3624 | } |
| 3625 | |
| 3626 | void Sema::AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E, |
| 3627 | unsigned SpellingListIndex, bool IsPackExpansion) { |
| 3628 | AlignedAttr TmpAttr(AttrRange, Context, true, E, SpellingListIndex); |
| 3629 | SourceLocation AttrLoc = AttrRange.getBegin(); |
| 3630 | |
| 3631 | // C++11 alignas(...) and C11 _Alignas(...) have additional requirements. |
| 3632 | if (TmpAttr.isAlignas()) { |
| 3633 | // C++11 [dcl.align]p1: |
| 3634 | // An alignment-specifier may be applied to a variable or to a class |
| 3635 | // data member, but it shall not be applied to a bit-field, a function |
| 3636 | // parameter, the formal parameter of a catch clause, or a variable |
| 3637 | // declared with the register storage class specifier. An |
| 3638 | // alignment-specifier may also be applied to the declaration of a class |
| 3639 | // or enumeration type. |
| 3640 | // C11 6.7.5/2: |
| 3641 | // An alignment attribute shall not be specified in a declaration of |
| 3642 | // a typedef, or a bit-field, or a function, or a parameter, or an |
| 3643 | // object declared with the register storage-class specifier. |
| 3644 | int DiagKind = -1; |
| 3645 | if (isa<ParmVarDecl>(D)) { |
| 3646 | DiagKind = 0; |
| 3647 | } else if (const auto *VD = dyn_cast<VarDecl>(D)) { |
| 3648 | if (VD->getStorageClass() == SC_Register) |
| 3649 | DiagKind = 1; |
| 3650 | if (VD->isExceptionVariable()) |
| 3651 | DiagKind = 2; |
| 3652 | } else if (const auto *FD = dyn_cast<FieldDecl>(D)) { |
| 3653 | if (FD->isBitField()) |
| 3654 | DiagKind = 3; |
| 3655 | } else if (!isa<TagDecl>(D)) { |
| 3656 | Diag(AttrLoc, diag::err_attribute_wrong_decl_type) << &TmpAttr |
| 3657 | << (TmpAttr.isC11() ? ExpectedVariableOrField |
| 3658 | : ExpectedVariableFieldOrTag); |
| 3659 | return; |
| 3660 | } |
| 3661 | if (DiagKind != -1) { |
| 3662 | Diag(AttrLoc, diag::err_alignas_attribute_wrong_decl_type) |
| 3663 | << &TmpAttr << DiagKind; |
| 3664 | return; |
| 3665 | } |
| 3666 | } |
| 3667 | |
| 3668 | if (E->isValueDependent()) { |
| 3669 | // We can't support a dependent alignment on a non-dependent type, |
| 3670 | // because we have no way to model that a type is "alignment-dependent" |
| 3671 | // but not dependent in any other way. |
| 3672 | if (const auto *TND = dyn_cast<TypedefNameDecl>(D)) { |
| 3673 | if (!TND->getUnderlyingType()->isDependentType()) { |
| 3674 | Diag(AttrLoc, diag::err_alignment_dependent_typedef_name) |
| 3675 | << E->getSourceRange(); |
| 3676 | return; |
| 3677 | } |
| 3678 | } |
| 3679 | |
| 3680 | // Save dependent expressions in the AST to be instantiated. |
| 3681 | AlignedAttr *AA = ::new (Context) AlignedAttr(TmpAttr); |
| 3682 | AA->setPackExpansion(IsPackExpansion); |
| 3683 | D->addAttr(AA); |
| 3684 | return; |
| 3685 | } |
| 3686 | |
| 3687 | // FIXME: Cache the number on the AL object? |
| 3688 | llvm::APSInt Alignment; |
| 3689 | ExprResult ICE |
| 3690 | = VerifyIntegerConstantExpression(E, &Alignment, |
| 3691 | diag::err_aligned_attribute_argument_not_int, |
| 3692 | /*AllowFold*/ false); |
| 3693 | if (ICE.isInvalid()) |
| 3694 | return; |
| 3695 | |
| 3696 | uint64_t AlignVal = Alignment.getZExtValue(); |
| 3697 | |
| 3698 | // C++11 [dcl.align]p2: |
| 3699 | // -- if the constant expression evaluates to zero, the alignment |
| 3700 | // specifier shall have no effect |
| 3701 | // C11 6.7.5p6: |
| 3702 | // An alignment specification of zero has no effect. |
| 3703 | if (!(TmpAttr.isAlignas() && !Alignment)) { |
| 3704 | if (!llvm::isPowerOf2_64(AlignVal)) { |
| 3705 | Diag(AttrLoc, diag::err_alignment_not_power_of_two) |
| 3706 | << E->getSourceRange(); |
| 3707 | return; |
| 3708 | } |
| 3709 | } |
| 3710 | |
| 3711 | // Alignment calculations can wrap around if it's greater than 2**28. |
| 3712 | unsigned MaxValidAlignment = |
| 3713 | Context.getTargetInfo().getTriple().isOSBinFormatCOFF() ? 8192 |
| 3714 | : 268435456; |
| 3715 | if (AlignVal > MaxValidAlignment) { |
| 3716 | Diag(AttrLoc, diag::err_attribute_aligned_too_great) << MaxValidAlignment |
| 3717 | << E->getSourceRange(); |
| 3718 | return; |
| 3719 | } |
| 3720 | |
| 3721 | if (Context.getTargetInfo().isTLSSupported()) { |
| 3722 | unsigned MaxTLSAlign = |
| 3723 | Context.toCharUnitsFromBits(Context.getTargetInfo().getMaxTLSAlign()) |
| 3724 | .getQuantity(); |
| 3725 | const auto *VD = dyn_cast<VarDecl>(D); |
| 3726 | if (MaxTLSAlign && AlignVal > MaxTLSAlign && VD && |
| 3727 | VD->getTLSKind() != VarDecl::TLS_None) { |
| 3728 | Diag(VD->getLocation(), diag::err_tls_var_aligned_over_maximum) |
| 3729 | << (unsigned)AlignVal << VD << MaxTLSAlign; |
| 3730 | return; |
| 3731 | } |
| 3732 | } |
| 3733 | |
| 3734 | AlignedAttr *AA = ::new (Context) AlignedAttr(AttrRange, Context, true, |
| 3735 | ICE.get(), SpellingListIndex); |
| 3736 | AA->setPackExpansion(IsPackExpansion); |
| 3737 | D->addAttr(AA); |
| 3738 | } |
| 3739 | |
| 3740 | void Sema::AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *TS, |
| 3741 | unsigned SpellingListIndex, bool IsPackExpansion) { |
| 3742 | // FIXME: Cache the number on the AL object if non-dependent? |
| 3743 | // FIXME: Perform checking of type validity |
| 3744 | AlignedAttr *AA = ::new (Context) AlignedAttr(AttrRange, Context, false, TS, |
| 3745 | SpellingListIndex); |
| 3746 | AA->setPackExpansion(IsPackExpansion); |
| 3747 | D->addAttr(AA); |
| 3748 | } |
| 3749 | |
| 3750 | void Sema::CheckAlignasUnderalignment(Decl *D) { |
| 3751 | assert(D->hasAttrs() && "no attributes on decl")((D->hasAttrs() && "no attributes on decl") ? static_cast <void> (0) : __assert_fail ("D->hasAttrs() && \"no attributes on decl\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 3751, __PRETTY_FUNCTION__)); |
| 3752 | |
| 3753 | QualType UnderlyingTy, DiagTy; |
| 3754 | if (const auto *VD = dyn_cast<ValueDecl>(D)) { |
| 3755 | UnderlyingTy = DiagTy = VD->getType(); |
| 3756 | } else { |
| 3757 | UnderlyingTy = DiagTy = Context.getTagDeclType(cast<TagDecl>(D)); |
| 3758 | if (const auto *ED = dyn_cast<EnumDecl>(D)) |
| 3759 | UnderlyingTy = ED->getIntegerType(); |
| 3760 | } |
| 3761 | if (DiagTy->isDependentType() || DiagTy->isIncompleteType()) |
| 3762 | return; |
| 3763 | |
| 3764 | // C++11 [dcl.align]p5, C11 6.7.5/4: |
| 3765 | // The combined effect of all alignment attributes in a declaration shall |
| 3766 | // not specify an alignment that is less strict than the alignment that |
| 3767 | // would otherwise be required for the entity being declared. |
| 3768 | AlignedAttr *AlignasAttr = nullptr; |
| 3769 | unsigned Align = 0; |
| 3770 | for (auto *I : D->specific_attrs<AlignedAttr>()) { |
| 3771 | if (I->isAlignmentDependent()) |
| 3772 | return; |
| 3773 | if (I->isAlignas()) |
| 3774 | AlignasAttr = I; |
| 3775 | Align = std::max(Align, I->getAlignment(Context)); |
| 3776 | } |
| 3777 | |
| 3778 | if (AlignasAttr && Align) { |
| 3779 | CharUnits RequestedAlign = Context.toCharUnitsFromBits(Align); |
| 3780 | CharUnits NaturalAlign = Context.getTypeAlignInChars(UnderlyingTy); |
| 3781 | if (NaturalAlign > RequestedAlign) |
| 3782 | Diag(AlignasAttr->getLocation(), diag::err_alignas_underaligned) |
| 3783 | << DiagTy << (unsigned)NaturalAlign.getQuantity(); |
| 3784 | } |
| 3785 | } |
| 3786 | |
| 3787 | bool Sema::checkMSInheritanceAttrOnDefinition( |
| 3788 | CXXRecordDecl *RD, SourceRange Range, bool BestCase, |
| 3789 | MSInheritanceAttr::Spelling SemanticSpelling) { |
| 3790 | assert(RD->hasDefinition() && "RD has no definition!")((RD->hasDefinition() && "RD has no definition!") ? static_cast<void> (0) : __assert_fail ("RD->hasDefinition() && \"RD has no definition!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 3790, __PRETTY_FUNCTION__)); |
| 3791 | |
| 3792 | // We may not have seen base specifiers or any virtual methods yet. We will |
| 3793 | // have to wait until the record is defined to catch any mismatches. |
| 3794 | if (!RD->getDefinition()->isCompleteDefinition()) |
| 3795 | return false; |
| 3796 | |
| 3797 | // The unspecified model never matches what a definition could need. |
| 3798 | if (SemanticSpelling == MSInheritanceAttr::Keyword_unspecified_inheritance) |
| 3799 | return false; |
| 3800 | |
| 3801 | if (BestCase) { |
| 3802 | if (RD->calculateInheritanceModel() == SemanticSpelling) |
| 3803 | return false; |
| 3804 | } else { |
| 3805 | if (RD->calculateInheritanceModel() <= SemanticSpelling) |
| 3806 | return false; |
| 3807 | } |
| 3808 | |
| 3809 | Diag(Range.getBegin(), diag::err_mismatched_ms_inheritance) |
| 3810 | << 0 /*definition*/; |
| 3811 | Diag(RD->getDefinition()->getLocation(), diag::note_defined_here) |
| 3812 | << RD->getNameAsString(); |
| 3813 | return true; |
| 3814 | } |
| 3815 | |
| 3816 | /// parseModeAttrArg - Parses attribute mode string and returns parsed type |
| 3817 | /// attribute. |
| 3818 | static void parseModeAttrArg(Sema &S, StringRef Str, unsigned &DestWidth, |
| 3819 | bool &IntegerMode, bool &ComplexMode) { |
| 3820 | IntegerMode = true; |
| 3821 | ComplexMode = false; |
| 3822 | switch (Str.size()) { |
| 3823 | case 2: |
| 3824 | switch (Str[0]) { |
| 3825 | case 'Q': |
| 3826 | DestWidth = 8; |
| 3827 | break; |
| 3828 | case 'H': |
| 3829 | DestWidth = 16; |
| 3830 | break; |
| 3831 | case 'S': |
| 3832 | DestWidth = 32; |
| 3833 | break; |
| 3834 | case 'D': |
| 3835 | DestWidth = 64; |
| 3836 | break; |
| 3837 | case 'X': |
| 3838 | DestWidth = 96; |
| 3839 | break; |
| 3840 | case 'T': |
| 3841 | DestWidth = 128; |
| 3842 | break; |
| 3843 | } |
| 3844 | if (Str[1] == 'F') { |
| 3845 | IntegerMode = false; |
| 3846 | } else if (Str[1] == 'C') { |
| 3847 | IntegerMode = false; |
| 3848 | ComplexMode = true; |
| 3849 | } else if (Str[1] != 'I') { |
| 3850 | DestWidth = 0; |
| 3851 | } |
| 3852 | break; |
| 3853 | case 4: |
| 3854 | // FIXME: glibc uses 'word' to define register_t; this is narrower than a |
| 3855 | // pointer on PIC16 and other embedded platforms. |
| 3856 | if (Str == "word") |
| 3857 | DestWidth = S.Context.getTargetInfo().getRegisterWidth(); |
| 3858 | else if (Str == "byte") |
| 3859 | DestWidth = S.Context.getTargetInfo().getCharWidth(); |
| 3860 | break; |
| 3861 | case 7: |
| 3862 | if (Str == "pointer") |
| 3863 | DestWidth = S.Context.getTargetInfo().getPointerWidth(0); |
| 3864 | break; |
| 3865 | case 11: |
| 3866 | if (Str == "unwind_word") |
| 3867 | DestWidth = S.Context.getTargetInfo().getUnwindWordWidth(); |
| 3868 | break; |
| 3869 | } |
| 3870 | } |
| 3871 | |
| 3872 | /// handleModeAttr - This attribute modifies the width of a decl with primitive |
| 3873 | /// type. |
| 3874 | /// |
| 3875 | /// Despite what would be logical, the mode attribute is a decl attribute, not a |
| 3876 | /// type attribute: 'int ** __attribute((mode(HI))) *G;' tries to make 'G' be |
| 3877 | /// HImode, not an intermediate pointer. |
| 3878 | static void handleModeAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 3879 | // This attribute isn't documented, but glibc uses it. It changes |
| 3880 | // the width of an int or unsigned int to the specified size. |
| 3881 | if (!AL.isArgIdent(0)) { |
| 3882 | S.Diag(AL.getLoc(), diag::err_attribute_argument_type) |
| 3883 | << AL << AANT_ArgumentIdentifier; |
| 3884 | return; |
| 3885 | } |
| 3886 | |
| 3887 | IdentifierInfo *Name = AL.getArgAsIdent(0)->Ident; |
| 3888 | |
| 3889 | S.AddModeAttr(AL.getRange(), D, Name, AL.getAttributeSpellingListIndex()); |
| 3890 | } |
| 3891 | |
| 3892 | void Sema::AddModeAttr(SourceRange AttrRange, Decl *D, IdentifierInfo *Name, |
| 3893 | unsigned SpellingListIndex, bool InInstantiation) { |
| 3894 | StringRef Str = Name->getName(); |
| 3895 | normalizeName(Str); |
| 3896 | SourceLocation AttrLoc = AttrRange.getBegin(); |
| 3897 | |
| 3898 | unsigned DestWidth = 0; |
| 3899 | bool IntegerMode = true; |
| 3900 | bool ComplexMode = false; |
| 3901 | llvm::APInt VectorSize(64, 0); |
| 3902 | if (Str.size() >= 4 && Str[0] == 'V') { |
| 3903 | // Minimal length of vector mode is 4: 'V' + NUMBER(>=1) + TYPE(>=2). |
| 3904 | size_t StrSize = Str.size(); |
| 3905 | size_t VectorStringLength = 0; |
| 3906 | while ((VectorStringLength + 1) < StrSize && |
| 3907 | isdigit(Str[VectorStringLength + 1])) |
| 3908 | ++VectorStringLength; |
| 3909 | if (VectorStringLength && |
| 3910 | !Str.substr(1, VectorStringLength).getAsInteger(10, VectorSize) && |
| 3911 | VectorSize.isPowerOf2()) { |
| 3912 | parseModeAttrArg(*this, Str.substr(VectorStringLength + 1), DestWidth, |
| 3913 | IntegerMode, ComplexMode); |
| 3914 | // Avoid duplicate warning from template instantiation. |
| 3915 | if (!InInstantiation) |
| 3916 | Diag(AttrLoc, diag::warn_vector_mode_deprecated); |
| 3917 | } else { |
| 3918 | VectorSize = 0; |
| 3919 | } |
| 3920 | } |
| 3921 | |
| 3922 | if (!VectorSize) |
| 3923 | parseModeAttrArg(*this, Str, DestWidth, IntegerMode, ComplexMode); |
| 3924 | |
| 3925 | // FIXME: Sync this with InitializePredefinedMacros; we need to match int8_t |
| 3926 | // and friends, at least with glibc. |
| 3927 | // FIXME: Make sure floating-point mappings are accurate |
| 3928 | // FIXME: Support XF and TF types |
| 3929 | if (!DestWidth) { |
| 3930 | Diag(AttrLoc, diag::err_machine_mode) << 0 /*Unknown*/ << Name; |
| 3931 | return; |
| 3932 | } |
| 3933 | |
| 3934 | QualType OldTy; |
| 3935 | if (const auto *TD = dyn_cast<TypedefNameDecl>(D)) |
| 3936 | OldTy = TD->getUnderlyingType(); |
| 3937 | else if (const auto *ED = dyn_cast<EnumDecl>(D)) { |
| 3938 | // Something like 'typedef enum { X } __attribute__((mode(XX))) T;'. |
| 3939 | // Try to get type from enum declaration, default to int. |
| 3940 | OldTy = ED->getIntegerType(); |
| 3941 | if (OldTy.isNull()) |
| 3942 | OldTy = Context.IntTy; |
| 3943 | } else |
| 3944 | OldTy = cast<ValueDecl>(D)->getType(); |
| 3945 | |
| 3946 | if (OldTy->isDependentType()) { |
| 3947 | D->addAttr(::new (Context) |
| 3948 | ModeAttr(AttrRange, Context, Name, SpellingListIndex)); |
| 3949 | return; |
| 3950 | } |
| 3951 | |
| 3952 | // Base type can also be a vector type (see PR17453). |
| 3953 | // Distinguish between base type and base element type. |
| 3954 | QualType OldElemTy = OldTy; |
| 3955 | if (const auto *VT = OldTy->getAs<VectorType>()) |
| 3956 | OldElemTy = VT->getElementType(); |
| 3957 | |
| 3958 | // GCC allows 'mode' attribute on enumeration types (even incomplete), except |
| 3959 | // for vector modes. So, 'enum X __attribute__((mode(QI)));' forms a complete |
| 3960 | // type, 'enum { A } __attribute__((mode(V4SI)))' is rejected. |
| 3961 | if ((isa<EnumDecl>(D) || OldElemTy->getAs<EnumType>()) && |
| 3962 | VectorSize.getBoolValue()) { |
| 3963 | Diag(AttrLoc, diag::err_enum_mode_vector_type) << Name << AttrRange; |
| 3964 | return; |
| 3965 | } |
| 3966 | bool IntegralOrAnyEnumType = |
| 3967 | OldElemTy->isIntegralOrEnumerationType() || OldElemTy->getAs<EnumType>(); |
| 3968 | |
| 3969 | if (!OldElemTy->getAs<BuiltinType>() && !OldElemTy->isComplexType() && |
| 3970 | !IntegralOrAnyEnumType) |
| 3971 | Diag(AttrLoc, diag::err_mode_not_primitive); |
| 3972 | else if (IntegerMode) { |
| 3973 | if (!IntegralOrAnyEnumType) |
| 3974 | Diag(AttrLoc, diag::err_mode_wrong_type); |
| 3975 | } else if (ComplexMode) { |
| 3976 | if (!OldElemTy->isComplexType()) |
| 3977 | Diag(AttrLoc, diag::err_mode_wrong_type); |
| 3978 | } else { |
| 3979 | if (!OldElemTy->isFloatingType()) |
| 3980 | Diag(AttrLoc, diag::err_mode_wrong_type); |
| 3981 | } |
| 3982 | |
| 3983 | QualType NewElemTy; |
| 3984 | |
| 3985 | if (IntegerMode) |
| 3986 | NewElemTy = Context.getIntTypeForBitwidth(DestWidth, |
| 3987 | OldElemTy->isSignedIntegerType()); |
| 3988 | else |
| 3989 | NewElemTy = Context.getRealTypeForBitwidth(DestWidth); |
| 3990 | |
| 3991 | if (NewElemTy.isNull()) { |
| 3992 | Diag(AttrLoc, diag::err_machine_mode) << 1 /*Unsupported*/ << Name; |
| 3993 | return; |
| 3994 | } |
| 3995 | |
| 3996 | if (ComplexMode) { |
| 3997 | NewElemTy = Context.getComplexType(NewElemTy); |
| 3998 | } |
| 3999 | |
| 4000 | QualType NewTy = NewElemTy; |
| 4001 | if (VectorSize.getBoolValue()) { |
| 4002 | NewTy = Context.getVectorType(NewTy, VectorSize.getZExtValue(), |
| 4003 | VectorType::GenericVector); |
| 4004 | } else if (const auto *OldVT = OldTy->getAs<VectorType>()) { |
| 4005 | // Complex machine mode does not support base vector types. |
| 4006 | if (ComplexMode) { |
| 4007 | Diag(AttrLoc, diag::err_complex_mode_vector_type); |
| 4008 | return; |
| 4009 | } |
| 4010 | unsigned NumElements = Context.getTypeSize(OldElemTy) * |
| 4011 | OldVT->getNumElements() / |
| 4012 | Context.getTypeSize(NewElemTy); |
| 4013 | NewTy = |
| 4014 | Context.getVectorType(NewElemTy, NumElements, OldVT->getVectorKind()); |
| 4015 | } |
| 4016 | |
| 4017 | if (NewTy.isNull()) { |
| 4018 | Diag(AttrLoc, diag::err_mode_wrong_type); |
| 4019 | return; |
| 4020 | } |
| 4021 | |
| 4022 | // Install the new type. |
| 4023 | if (auto *TD = dyn_cast<TypedefNameDecl>(D)) |
| 4024 | TD->setModedTypeSourceInfo(TD->getTypeSourceInfo(), NewTy); |
| 4025 | else if (auto *ED = dyn_cast<EnumDecl>(D)) |
| 4026 | ED->setIntegerType(NewTy); |
| 4027 | else |
| 4028 | cast<ValueDecl>(D)->setType(NewTy); |
| 4029 | |
| 4030 | D->addAttr(::new (Context) |
| 4031 | ModeAttr(AttrRange, Context, Name, SpellingListIndex)); |
| 4032 | } |
| 4033 | |
| 4034 | static void handleNoDebugAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 4035 | D->addAttr(::new (S.Context) |
| 4036 | NoDebugAttr(AL.getRange(), S.Context, |
| 4037 | AL.getAttributeSpellingListIndex())); |
| 4038 | } |
| 4039 | |
| 4040 | AlwaysInlineAttr *Sema::mergeAlwaysInlineAttr(Decl *D, SourceRange Range, |
| 4041 | IdentifierInfo *Ident, |
| 4042 | unsigned AttrSpellingListIndex) { |
| 4043 | if (OptimizeNoneAttr *Optnone = D->getAttr<OptimizeNoneAttr>()) { |
| 4044 | Diag(Range.getBegin(), diag::warn_attribute_ignored) << Ident; |
| 4045 | Diag(Optnone->getLocation(), diag::note_conflicting_attribute); |
| 4046 | return nullptr; |
| 4047 | } |
| 4048 | |
| 4049 | if (D->hasAttr<AlwaysInlineAttr>()) |
| 4050 | return nullptr; |
| 4051 | |
| 4052 | return ::new (Context) AlwaysInlineAttr(Range, Context, |
| 4053 | AttrSpellingListIndex); |
| 4054 | } |
| 4055 | |
| 4056 | CommonAttr *Sema::mergeCommonAttr(Decl *D, const ParsedAttr &AL) { |
| 4057 | if (checkAttrMutualExclusion<InternalLinkageAttr>(*this, D, AL)) |
| 4058 | return nullptr; |
| 4059 | |
| 4060 | return ::new (Context) |
| 4061 | CommonAttr(AL.getRange(), Context, AL.getAttributeSpellingListIndex()); |
| 4062 | } |
| 4063 | |
| 4064 | CommonAttr *Sema::mergeCommonAttr(Decl *D, const CommonAttr &AL) { |
| 4065 | if (checkAttrMutualExclusion<InternalLinkageAttr>(*this, D, AL)) |
| 4066 | return nullptr; |
| 4067 | |
| 4068 | return ::new (Context) |
| 4069 | CommonAttr(AL.getRange(), Context, AL.getSpellingListIndex()); |
| 4070 | } |
| 4071 | |
| 4072 | InternalLinkageAttr *Sema::mergeInternalLinkageAttr(Decl *D, |
| 4073 | const ParsedAttr &AL) { |
| 4074 | if (const auto *VD = dyn_cast<VarDecl>(D)) { |
| 4075 | // Attribute applies to Var but not any subclass of it (like ParmVar, |
| 4076 | // ImplicitParm or VarTemplateSpecialization). |
| 4077 | if (VD->getKind() != Decl::Var) { |
| 4078 | Diag(AL.getLoc(), diag::warn_attribute_wrong_decl_type) |
| 4079 | << AL << (getLangOpts().CPlusPlus ? ExpectedFunctionVariableOrClass |
| 4080 | : ExpectedVariableOrFunction); |
| 4081 | return nullptr; |
| 4082 | } |
| 4083 | // Attribute does not apply to non-static local variables. |
| 4084 | if (VD->hasLocalStorage()) { |
| 4085 | Diag(VD->getLocation(), diag::warn_internal_linkage_local_storage); |
| 4086 | return nullptr; |
| 4087 | } |
| 4088 | } |
| 4089 | |
| 4090 | if (checkAttrMutualExclusion<CommonAttr>(*this, D, AL)) |
| 4091 | return nullptr; |
| 4092 | |
| 4093 | return ::new (Context) InternalLinkageAttr( |
| 4094 | AL.getRange(), Context, AL.getAttributeSpellingListIndex()); |
| 4095 | } |
| 4096 | InternalLinkageAttr * |
| 4097 | Sema::mergeInternalLinkageAttr(Decl *D, const InternalLinkageAttr &AL) { |
| 4098 | if (const auto *VD = dyn_cast<VarDecl>(D)) { |
| 4099 | // Attribute applies to Var but not any subclass of it (like ParmVar, |
| 4100 | // ImplicitParm or VarTemplateSpecialization). |
| 4101 | if (VD->getKind() != Decl::Var) { |
| 4102 | Diag(AL.getLocation(), diag::warn_attribute_wrong_decl_type) |
| 4103 | << &AL << (getLangOpts().CPlusPlus ? ExpectedFunctionVariableOrClass |
| 4104 | : ExpectedVariableOrFunction); |
| 4105 | return nullptr; |
| 4106 | } |
| 4107 | // Attribute does not apply to non-static local variables. |
| 4108 | if (VD->hasLocalStorage()) { |
| 4109 | Diag(VD->getLocation(), diag::warn_internal_linkage_local_storage); |
| 4110 | return nullptr; |
| 4111 | } |
| 4112 | } |
| 4113 | |
| 4114 | if (checkAttrMutualExclusion<CommonAttr>(*this, D, AL)) |
| 4115 | return nullptr; |
| 4116 | |
| 4117 | return ::new (Context) |
| 4118 | InternalLinkageAttr(AL.getRange(), Context, AL.getSpellingListIndex()); |
| 4119 | } |
| 4120 | |
| 4121 | MinSizeAttr *Sema::mergeMinSizeAttr(Decl *D, SourceRange Range, |
| 4122 | unsigned AttrSpellingListIndex) { |
| 4123 | if (OptimizeNoneAttr *Optnone = D->getAttr<OptimizeNoneAttr>()) { |
| 4124 | Diag(Range.getBegin(), diag::warn_attribute_ignored) << "'minsize'"; |
| 4125 | Diag(Optnone->getLocation(), diag::note_conflicting_attribute); |
| 4126 | return nullptr; |
| 4127 | } |
| 4128 | |
| 4129 | if (D->hasAttr<MinSizeAttr>()) |
| 4130 | return nullptr; |
| 4131 | |
| 4132 | return ::new (Context) MinSizeAttr(Range, Context, AttrSpellingListIndex); |
| 4133 | } |
| 4134 | |
| 4135 | OptimizeNoneAttr *Sema::mergeOptimizeNoneAttr(Decl *D, SourceRange Range, |
| 4136 | unsigned AttrSpellingListIndex) { |
| 4137 | if (AlwaysInlineAttr *Inline = D->getAttr<AlwaysInlineAttr>()) { |
| 4138 | Diag(Inline->getLocation(), diag::warn_attribute_ignored) << Inline; |
| 4139 | Diag(Range.getBegin(), diag::note_conflicting_attribute); |
| 4140 | D->dropAttr<AlwaysInlineAttr>(); |
| 4141 | } |
| 4142 | if (MinSizeAttr *MinSize = D->getAttr<MinSizeAttr>()) { |
| 4143 | Diag(MinSize->getLocation(), diag::warn_attribute_ignored) << MinSize; |
| 4144 | Diag(Range.getBegin(), diag::note_conflicting_attribute); |
| 4145 | D->dropAttr<MinSizeAttr>(); |
| 4146 | } |
| 4147 | |
| 4148 | if (D->hasAttr<OptimizeNoneAttr>()) |
| 4149 | return nullptr; |
| 4150 | |
| 4151 | return ::new (Context) OptimizeNoneAttr(Range, Context, |
| 4152 | AttrSpellingListIndex); |
| 4153 | } |
| 4154 | |
| 4155 | static void handleAlwaysInlineAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 4156 | if (checkAttrMutualExclusion<NotTailCalledAttr>(S, D, AL)) |
| 4157 | return; |
| 4158 | |
| 4159 | if (AlwaysInlineAttr *Inline = S.mergeAlwaysInlineAttr( |
| 4160 | D, AL.getRange(), AL.getName(), |
| 4161 | AL.getAttributeSpellingListIndex())) |
| 4162 | D->addAttr(Inline); |
| 4163 | } |
| 4164 | |
| 4165 | static void handleMinSizeAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 4166 | if (MinSizeAttr *MinSize = S.mergeMinSizeAttr( |
| 4167 | D, AL.getRange(), AL.getAttributeSpellingListIndex())) |
| 4168 | D->addAttr(MinSize); |
| 4169 | } |
| 4170 | |
| 4171 | static void handleOptimizeNoneAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 4172 | if (OptimizeNoneAttr *Optnone = S.mergeOptimizeNoneAttr( |
| 4173 | D, AL.getRange(), AL.getAttributeSpellingListIndex())) |
| 4174 | D->addAttr(Optnone); |
| 4175 | } |
| 4176 | |
| 4177 | static void handleConstantAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 4178 | if (checkAttrMutualExclusion<CUDASharedAttr>(S, D, AL)) |
| 4179 | return; |
| 4180 | const auto *VD = cast<VarDecl>(D); |
| 4181 | if (!VD->hasGlobalStorage()) { |
| 4182 | S.Diag(AL.getLoc(), diag::err_cuda_nonglobal_constant); |
| 4183 | return; |
| 4184 | } |
| 4185 | D->addAttr(::new (S.Context) CUDAConstantAttr( |
| 4186 | AL.getRange(), S.Context, AL.getAttributeSpellingListIndex())); |
| 4187 | } |
| 4188 | |
| 4189 | static void handleSharedAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 4190 | if (checkAttrMutualExclusion<CUDAConstantAttr>(S, D, AL)) |
| 4191 | return; |
| 4192 | const auto *VD = cast<VarDecl>(D); |
| 4193 | // extern __shared__ is only allowed on arrays with no length (e.g. |
| 4194 | // "int x[]"). |
| 4195 | if (!S.getLangOpts().GPURelocatableDeviceCode && VD->hasExternalStorage() && |
| 4196 | !isa<IncompleteArrayType>(VD->getType())) { |
| 4197 | S.Diag(AL.getLoc(), diag::err_cuda_extern_shared) << VD; |
| 4198 | return; |
| 4199 | } |
| 4200 | if (S.getLangOpts().CUDA && VD->hasLocalStorage() && |
| 4201 | S.CUDADiagIfHostCode(AL.getLoc(), diag::err_cuda_host_shared) |
| 4202 | << S.CurrentCUDATarget()) |
| 4203 | return; |
| 4204 | D->addAttr(::new (S.Context) CUDASharedAttr( |
| 4205 | AL.getRange(), S.Context, AL.getAttributeSpellingListIndex())); |
| 4206 | } |
| 4207 | |
| 4208 | static void handleGlobalAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 4209 | if (checkAttrMutualExclusion<CUDADeviceAttr>(S, D, AL) || |
| 4210 | checkAttrMutualExclusion<CUDAHostAttr>(S, D, AL)) { |
| 4211 | return; |
| 4212 | } |
| 4213 | const auto *FD = cast<FunctionDecl>(D); |
| 4214 | if (!FD->getReturnType()->isVoidType()) { |
| 4215 | SourceRange RTRange = FD->getReturnTypeSourceRange(); |
| 4216 | S.Diag(FD->getTypeSpecStartLoc(), diag::err_kern_type_not_void_return) |
| 4217 | << FD->getType() |
| 4218 | << (RTRange.isValid() ? FixItHint::CreateReplacement(RTRange, "void") |
| 4219 | : FixItHint()); |
| 4220 | return; |
| 4221 | } |
| 4222 | if (const auto *Method = dyn_cast<CXXMethodDecl>(FD)) { |
| 4223 | if (Method->isInstance()) { |
| 4224 | S.Diag(Method->getBeginLoc(), diag::err_kern_is_nonstatic_method) |
| 4225 | << Method; |
| 4226 | return; |
| 4227 | } |
| 4228 | S.Diag(Method->getBeginLoc(), diag::warn_kern_is_method) << Method; |
| 4229 | } |
| 4230 | // Only warn for "inline" when compiling for host, to cut down on noise. |
| 4231 | if (FD->isInlineSpecified() && !S.getLangOpts().CUDAIsDevice) |
| 4232 | S.Diag(FD->getBeginLoc(), diag::warn_kern_is_inline) << FD; |
| 4233 | |
| 4234 | D->addAttr(::new (S.Context) |
| 4235 | CUDAGlobalAttr(AL.getRange(), S.Context, |
| 4236 | AL.getAttributeSpellingListIndex())); |
| 4237 | } |
| 4238 | |
| 4239 | static void handleGNUInlineAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 4240 | const auto *Fn = cast<FunctionDecl>(D); |
| 4241 | if (!Fn->isInlineSpecified()) { |
| 4242 | S.Diag(AL.getLoc(), diag::warn_gnu_inline_attribute_requires_inline); |
| 4243 | return; |
| 4244 | } |
| 4245 | |
| 4246 | D->addAttr(::new (S.Context) |
| 4247 | GNUInlineAttr(AL.getRange(), S.Context, |
| 4248 | AL.getAttributeSpellingListIndex())); |
| 4249 | } |
| 4250 | |
| 4251 | static void handleCallConvAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 4252 | if (hasDeclarator(D)) return; |
| 4253 | |
| 4254 | // Diagnostic is emitted elsewhere: here we store the (valid) AL |
| 4255 | // in the Decl node for syntactic reasoning, e.g., pretty-printing. |
| 4256 | CallingConv CC; |
| 4257 | if (S.CheckCallingConvAttr(AL, CC, /*FD*/nullptr)) |
| 4258 | return; |
| 4259 | |
| 4260 | if (!isa<ObjCMethodDecl>(D)) { |
| 4261 | S.Diag(AL.getLoc(), diag::warn_attribute_wrong_decl_type) |
| 4262 | << AL << ExpectedFunctionOrMethod; |
| 4263 | return; |
| 4264 | } |
| 4265 | |
| 4266 | switch (AL.getKind()) { |
| 4267 | case ParsedAttr::AT_FastCall: |
| 4268 | D->addAttr(::new (S.Context) |
| 4269 | FastCallAttr(AL.getRange(), S.Context, |
| 4270 | AL.getAttributeSpellingListIndex())); |
| 4271 | return; |
| 4272 | case ParsedAttr::AT_StdCall: |
| 4273 | D->addAttr(::new (S.Context) |
| 4274 | StdCallAttr(AL.getRange(), S.Context, |
| 4275 | AL.getAttributeSpellingListIndex())); |
| 4276 | return; |
| 4277 | case ParsedAttr::AT_ThisCall: |
| 4278 | D->addAttr(::new (S.Context) |
| 4279 | ThisCallAttr(AL.getRange(), S.Context, |
| 4280 | AL.getAttributeSpellingListIndex())); |
| 4281 | return; |
| 4282 | case ParsedAttr::AT_CDecl: |
| 4283 | D->addAttr(::new (S.Context) |
| 4284 | CDeclAttr(AL.getRange(), S.Context, |
| 4285 | AL.getAttributeSpellingListIndex())); |
| 4286 | return; |
| 4287 | case ParsedAttr::AT_Pascal: |
| 4288 | D->addAttr(::new (S.Context) |
| 4289 | PascalAttr(AL.getRange(), S.Context, |
| 4290 | AL.getAttributeSpellingListIndex())); |
| 4291 | return; |
| 4292 | case ParsedAttr::AT_SwiftCall: |
| 4293 | D->addAttr(::new (S.Context) |
| 4294 | SwiftCallAttr(AL.getRange(), S.Context, |
| 4295 | AL.getAttributeSpellingListIndex())); |
| 4296 | return; |
| 4297 | case ParsedAttr::AT_VectorCall: |
| 4298 | D->addAttr(::new (S.Context) |
| 4299 | VectorCallAttr(AL.getRange(), S.Context, |
| 4300 | AL.getAttributeSpellingListIndex())); |
| 4301 | return; |
| 4302 | case ParsedAttr::AT_MSABI: |
| 4303 | D->addAttr(::new (S.Context) |
| 4304 | MSABIAttr(AL.getRange(), S.Context, |
| 4305 | AL.getAttributeSpellingListIndex())); |
| 4306 | return; |
| 4307 | case ParsedAttr::AT_SysVABI: |
| 4308 | D->addAttr(::new (S.Context) |
| 4309 | SysVABIAttr(AL.getRange(), S.Context, |
| 4310 | AL.getAttributeSpellingListIndex())); |
| 4311 | return; |
| 4312 | case ParsedAttr::AT_RegCall: |
| 4313 | D->addAttr(::new (S.Context) RegCallAttr( |
| 4314 | AL.getRange(), S.Context, AL.getAttributeSpellingListIndex())); |
| 4315 | return; |
| 4316 | case ParsedAttr::AT_Pcs: { |
| 4317 | PcsAttr::PCSType PCS; |
| 4318 | switch (CC) { |
| 4319 | case CC_AAPCS: |
| 4320 | PCS = PcsAttr::AAPCS; |
| 4321 | break; |
| 4322 | case CC_AAPCS_VFP: |
| 4323 | PCS = PcsAttr::AAPCS_VFP; |
| 4324 | break; |
| 4325 | default: |
| 4326 | llvm_unreachable("unexpected calling convention in pcs attribute")::llvm::llvm_unreachable_internal("unexpected calling convention in pcs attribute" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 4326); |
| 4327 | } |
| 4328 | |
| 4329 | D->addAttr(::new (S.Context) |
| 4330 | PcsAttr(AL.getRange(), S.Context, PCS, |
| 4331 | AL.getAttributeSpellingListIndex())); |
| 4332 | return; |
| 4333 | } |
| 4334 | case ParsedAttr::AT_AArch64VectorPcs: |
| 4335 | D->addAttr(::new(S.Context) |
| 4336 | AArch64VectorPcsAttr(AL.getRange(), S.Context, |
| 4337 | AL.getAttributeSpellingListIndex())); |
| 4338 | return; |
| 4339 | case ParsedAttr::AT_IntelOclBicc: |
| 4340 | D->addAttr(::new (S.Context) |
| 4341 | IntelOclBiccAttr(AL.getRange(), S.Context, |
| 4342 | AL.getAttributeSpellingListIndex())); |
| 4343 | return; |
| 4344 | case ParsedAttr::AT_PreserveMost: |
| 4345 | D->addAttr(::new (S.Context) PreserveMostAttr( |
| 4346 | AL.getRange(), S.Context, AL.getAttributeSpellingListIndex())); |
| 4347 | return; |
| 4348 | case ParsedAttr::AT_PreserveAll: |
| 4349 | D->addAttr(::new (S.Context) PreserveAllAttr( |
| 4350 | AL.getRange(), S.Context, AL.getAttributeSpellingListIndex())); |
| 4351 | return; |
| 4352 | default: |
| 4353 | llvm_unreachable("unexpected attribute kind")::llvm::llvm_unreachable_internal("unexpected attribute kind" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 4353); |
| 4354 | } |
| 4355 | } |
| 4356 | |
| 4357 | static void handleSuppressAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 4358 | if (!checkAttributeAtLeastNumArgs(S, AL, 1)) |
| 4359 | return; |
| 4360 | |
| 4361 | std::vector<StringRef> DiagnosticIdentifiers; |
| 4362 | for (unsigned I = 0, E = AL.getNumArgs(); I != E; ++I) { |
| 4363 | StringRef RuleName; |
| 4364 | |
| 4365 | if (!S.checkStringLiteralArgumentAttr(AL, I, RuleName, nullptr)) |
| 4366 | return; |
| 4367 | |
| 4368 | // FIXME: Warn if the rule name is unknown. This is tricky because only |
| 4369 | // clang-tidy knows about available rules. |
| 4370 | DiagnosticIdentifiers.push_back(RuleName); |
| 4371 | } |
| 4372 | D->addAttr(::new (S.Context) SuppressAttr( |
| 4373 | AL.getRange(), S.Context, DiagnosticIdentifiers.data(), |
| 4374 | DiagnosticIdentifiers.size(), AL.getAttributeSpellingListIndex())); |
| 4375 | } |
| 4376 | |
| 4377 | bool Sema::CheckCallingConvAttr(const ParsedAttr &Attrs, CallingConv &CC, |
| 4378 | const FunctionDecl *FD) { |
| 4379 | if (Attrs.isInvalid()) |
| 4380 | return true; |
| 4381 | |
| 4382 | if (Attrs.hasProcessingCache()) { |
| 4383 | CC = (CallingConv) Attrs.getProcessingCache(); |
| 4384 | return false; |
| 4385 | } |
| 4386 | |
| 4387 | unsigned ReqArgs = Attrs.getKind() == ParsedAttr::AT_Pcs ? 1 : 0; |
| 4388 | if (!checkAttributeNumArgs(*this, Attrs, ReqArgs)) { |
| 4389 | Attrs.setInvalid(); |
| 4390 | return true; |
| 4391 | } |
| 4392 | |
| 4393 | // TODO: diagnose uses of these conventions on the wrong target. |
| 4394 | switch (Attrs.getKind()) { |
| 4395 | case ParsedAttr::AT_CDecl: |
| 4396 | CC = CC_C; |
| 4397 | break; |
| 4398 | case ParsedAttr::AT_FastCall: |
| 4399 | CC = CC_X86FastCall; |
| 4400 | break; |
| 4401 | case ParsedAttr::AT_StdCall: |
| 4402 | CC = CC_X86StdCall; |
| 4403 | break; |
| 4404 | case ParsedAttr::AT_ThisCall: |
| 4405 | CC = CC_X86ThisCall; |
| 4406 | break; |
| 4407 | case ParsedAttr::AT_Pascal: |
| 4408 | CC = CC_X86Pascal; |
| 4409 | break; |
| 4410 | case ParsedAttr::AT_SwiftCall: |
| 4411 | CC = CC_Swift; |
| 4412 | break; |
| 4413 | case ParsedAttr::AT_VectorCall: |
| 4414 | CC = CC_X86VectorCall; |
| 4415 | break; |
| 4416 | case ParsedAttr::AT_AArch64VectorPcs: |
| 4417 | CC = CC_AArch64VectorCall; |
| 4418 | break; |
| 4419 | case ParsedAttr::AT_RegCall: |
| 4420 | CC = CC_X86RegCall; |
| 4421 | break; |
| 4422 | case ParsedAttr::AT_MSABI: |
| 4423 | CC = Context.getTargetInfo().getTriple().isOSWindows() ? CC_C : |
| 4424 | CC_Win64; |
| 4425 | break; |
| 4426 | case ParsedAttr::AT_SysVABI: |
| 4427 | CC = Context.getTargetInfo().getTriple().isOSWindows() ? CC_X86_64SysV : |
| 4428 | CC_C; |
| 4429 | break; |
| 4430 | case ParsedAttr::AT_Pcs: { |
| 4431 | StringRef StrRef; |
| 4432 | if (!checkStringLiteralArgumentAttr(Attrs, 0, StrRef)) { |
| 4433 | Attrs.setInvalid(); |
| 4434 | return true; |
| 4435 | } |
| 4436 | if (StrRef == "aapcs") { |
| 4437 | CC = CC_AAPCS; |
| 4438 | break; |
| 4439 | } else if (StrRef == "aapcs-vfp") { |
| 4440 | CC = CC_AAPCS_VFP; |
| 4441 | break; |
| 4442 | } |
| 4443 | |
| 4444 | Attrs.setInvalid(); |
| 4445 | Diag(Attrs.getLoc(), diag::err_invalid_pcs); |
| 4446 | return true; |
| 4447 | } |
| 4448 | case ParsedAttr::AT_IntelOclBicc: |
| 4449 | CC = CC_IntelOclBicc; |
| 4450 | break; |
| 4451 | case ParsedAttr::AT_PreserveMost: |
| 4452 | CC = CC_PreserveMost; |
| 4453 | break; |
| 4454 | case ParsedAttr::AT_PreserveAll: |
| 4455 | CC = CC_PreserveAll; |
| 4456 | break; |
| 4457 | default: llvm_unreachable("unexpected attribute kind")::llvm::llvm_unreachable_internal("unexpected attribute kind" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 4457); |
| 4458 | } |
| 4459 | |
| 4460 | const TargetInfo &TI = Context.getTargetInfo(); |
| 4461 | TargetInfo::CallingConvCheckResult A = TI.checkCallingConvention(CC); |
| 4462 | if (A != TargetInfo::CCCR_OK) { |
| 4463 | if (A == TargetInfo::CCCR_Warning) |
| 4464 | Diag(Attrs.getLoc(), diag::warn_cconv_ignored) << Attrs; |
| 4465 | |
| 4466 | // This convention is not valid for the target. Use the default function or |
| 4467 | // method calling convention. |
| 4468 | bool IsCXXMethod = false, IsVariadic = false; |
| 4469 | if (FD) { |
| 4470 | IsCXXMethod = FD->isCXXInstanceMember(); |
| 4471 | IsVariadic = FD->isVariadic(); |
| 4472 | } |
| 4473 | CC = Context.getDefaultCallingConvention(IsVariadic, IsCXXMethod); |
| 4474 | } |
| 4475 | |
| 4476 | Attrs.setProcessingCache((unsigned) CC); |
| 4477 | return false; |
| 4478 | } |
| 4479 | |
| 4480 | /// Pointer-like types in the default address space. |
| 4481 | static bool isValidSwiftContextType(QualType Ty) { |
| 4482 | if (!Ty->hasPointerRepresentation()) |
| 4483 | return Ty->isDependentType(); |
| 4484 | return Ty->getPointeeType().getAddressSpace() == LangAS::Default; |
| 4485 | } |
| 4486 | |
| 4487 | /// Pointers and references in the default address space. |
| 4488 | static bool isValidSwiftIndirectResultType(QualType Ty) { |
| 4489 | if (const auto *PtrType = Ty->getAs<PointerType>()) { |
| 4490 | Ty = PtrType->getPointeeType(); |
| 4491 | } else if (const auto *RefType = Ty->getAs<ReferenceType>()) { |
| 4492 | Ty = RefType->getPointeeType(); |
| 4493 | } else { |
| 4494 | return Ty->isDependentType(); |
| 4495 | } |
| 4496 | return Ty.getAddressSpace() == LangAS::Default; |
| 4497 | } |
| 4498 | |
| 4499 | /// Pointers and references to pointers in the default address space. |
| 4500 | static bool isValidSwiftErrorResultType(QualType Ty) { |
| 4501 | if (const auto *PtrType = Ty->getAs<PointerType>()) { |
| 4502 | Ty = PtrType->getPointeeType(); |
| 4503 | } else if (const auto *RefType = Ty->getAs<ReferenceType>()) { |
| 4504 | Ty = RefType->getPointeeType(); |
| 4505 | } else { |
| 4506 | return Ty->isDependentType(); |
| 4507 | } |
| 4508 | if (!Ty.getQualifiers().empty()) |
| 4509 | return false; |
| 4510 | return isValidSwiftContextType(Ty); |
| 4511 | } |
| 4512 | |
| 4513 | static void handleParameterABIAttr(Sema &S, Decl *D, const ParsedAttr &Attrs, |
| 4514 | ParameterABI Abi) { |
| 4515 | S.AddParameterABIAttr(Attrs.getRange(), D, Abi, |
| 4516 | Attrs.getAttributeSpellingListIndex()); |
| 4517 | } |
| 4518 | |
| 4519 | void Sema::AddParameterABIAttr(SourceRange range, Decl *D, ParameterABI abi, |
| 4520 | unsigned spellingIndex) { |
| 4521 | |
| 4522 | QualType type = cast<ParmVarDecl>(D)->getType(); |
| 4523 | |
| 4524 | if (auto existingAttr = D->getAttr<ParameterABIAttr>()) { |
| 4525 | if (existingAttr->getABI() != abi) { |
| 4526 | Diag(range.getBegin(), diag::err_attributes_are_not_compatible) |
| 4527 | << getParameterABISpelling(abi) << existingAttr; |
| 4528 | Diag(existingAttr->getLocation(), diag::note_conflicting_attribute); |
| 4529 | return; |
| 4530 | } |
| 4531 | } |
| 4532 | |
| 4533 | switch (abi) { |
| 4534 | case ParameterABI::Ordinary: |
| 4535 | llvm_unreachable("explicit attribute for ordinary parameter ABI?")::llvm::llvm_unreachable_internal("explicit attribute for ordinary parameter ABI?" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 4535); |
| 4536 | |
| 4537 | case ParameterABI::SwiftContext: |
| 4538 | if (!isValidSwiftContextType(type)) { |
| 4539 | Diag(range.getBegin(), diag::err_swift_abi_parameter_wrong_type) |
| 4540 | << getParameterABISpelling(abi) |
| 4541 | << /*pointer to pointer */ 0 << type; |
| 4542 | } |
| 4543 | D->addAttr(::new (Context) |
| 4544 | SwiftContextAttr(range, Context, spellingIndex)); |
| 4545 | return; |
| 4546 | |
| 4547 | case ParameterABI::SwiftErrorResult: |
| 4548 | if (!isValidSwiftErrorResultType(type)) { |
| 4549 | Diag(range.getBegin(), diag::err_swift_abi_parameter_wrong_type) |
| 4550 | << getParameterABISpelling(abi) |
| 4551 | << /*pointer to pointer */ 1 << type; |
| 4552 | } |
| 4553 | D->addAttr(::new (Context) |
| 4554 | SwiftErrorResultAttr(range, Context, spellingIndex)); |
| 4555 | return; |
| 4556 | |
| 4557 | case ParameterABI::SwiftIndirectResult: |
| 4558 | if (!isValidSwiftIndirectResultType(type)) { |
| 4559 | Diag(range.getBegin(), diag::err_swift_abi_parameter_wrong_type) |
| 4560 | << getParameterABISpelling(abi) |
| 4561 | << /*pointer*/ 0 << type; |
| 4562 | } |
| 4563 | D->addAttr(::new (Context) |
| 4564 | SwiftIndirectResultAttr(range, Context, spellingIndex)); |
| 4565 | return; |
| 4566 | } |
| 4567 | llvm_unreachable("bad parameter ABI attribute")::llvm::llvm_unreachable_internal("bad parameter ABI attribute" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 4567); |
| 4568 | } |
| 4569 | |
| 4570 | /// Checks a regparm attribute, returning true if it is ill-formed and |
| 4571 | /// otherwise setting numParams to the appropriate value. |
| 4572 | bool Sema::CheckRegparmAttr(const ParsedAttr &AL, unsigned &numParams) { |
| 4573 | if (AL.isInvalid()) |
| 4574 | return true; |
| 4575 | |
| 4576 | if (!checkAttributeNumArgs(*this, AL, 1)) { |
| 4577 | AL.setInvalid(); |
| 4578 | return true; |
| 4579 | } |
| 4580 | |
| 4581 | uint32_t NP; |
| 4582 | Expr *NumParamsExpr = AL.getArgAsExpr(0); |
| 4583 | if (!checkUInt32Argument(*this, AL, NumParamsExpr, NP)) { |
| 4584 | AL.setInvalid(); |
| 4585 | return true; |
| 4586 | } |
| 4587 | |
| 4588 | if (Context.getTargetInfo().getRegParmMax() == 0) { |
| 4589 | Diag(AL.getLoc(), diag::err_attribute_regparm_wrong_platform) |
| 4590 | << NumParamsExpr->getSourceRange(); |
| 4591 | AL.setInvalid(); |
| 4592 | return true; |
| 4593 | } |
| 4594 | |
| 4595 | numParams = NP; |
| 4596 | if (numParams > Context.getTargetInfo().getRegParmMax()) { |
| 4597 | Diag(AL.getLoc(), diag::err_attribute_regparm_invalid_number) |
| 4598 | << Context.getTargetInfo().getRegParmMax() << NumParamsExpr->getSourceRange(); |
| 4599 | AL.setInvalid(); |
| 4600 | return true; |
| 4601 | } |
| 4602 | |
| 4603 | return false; |
| 4604 | } |
| 4605 | |
| 4606 | // Checks whether an argument of launch_bounds attribute is |
| 4607 | // acceptable, performs implicit conversion to Rvalue, and returns |
| 4608 | // non-nullptr Expr result on success. Otherwise, it returns nullptr |
| 4609 | // and may output an error. |
| 4610 | static Expr *makeLaunchBoundsArgExpr(Sema &S, Expr *E, |
| 4611 | const CUDALaunchBoundsAttr &AL, |
| 4612 | const unsigned Idx) { |
| 4613 | if (S.DiagnoseUnexpandedParameterPack(E)) |
| 4614 | return nullptr; |
| 4615 | |
| 4616 | // Accept template arguments for now as they depend on something else. |
| 4617 | // We'll get to check them when they eventually get instantiated. |
| 4618 | if (E->isValueDependent()) |
| 4619 | return E; |
| 4620 | |
| 4621 | llvm::APSInt I(64); |
| 4622 | if (!E->isIntegerConstantExpr(I, S.Context)) { |
| 4623 | S.Diag(E->getExprLoc(), diag::err_attribute_argument_n_type) |
| 4624 | << &AL << Idx << AANT_ArgumentIntegerConstant << E->getSourceRange(); |
| 4625 | return nullptr; |
| 4626 | } |
| 4627 | // Make sure we can fit it in 32 bits. |
| 4628 | if (!I.isIntN(32)) { |
| 4629 | S.Diag(E->getExprLoc(), diag::err_ice_too_large) << I.toString(10, false) |
| 4630 | << 32 << /* Unsigned */ 1; |
| 4631 | return nullptr; |
| 4632 | } |
| 4633 | if (I < 0) |
| 4634 | S.Diag(E->getExprLoc(), diag::warn_attribute_argument_n_negative) |
| 4635 | << &AL << Idx << E->getSourceRange(); |
| 4636 | |
| 4637 | // We may need to perform implicit conversion of the argument. |
| 4638 | InitializedEntity Entity = InitializedEntity::InitializeParameter( |
| 4639 | S.Context, S.Context.getConstType(S.Context.IntTy), /*consume*/ false); |
| 4640 | ExprResult ValArg = S.PerformCopyInitialization(Entity, SourceLocation(), E); |
| 4641 | assert(!ValArg.isInvalid() &&((!ValArg.isInvalid() && "Unexpected PerformCopyInitialization() failure." ) ? static_cast<void> (0) : __assert_fail ("!ValArg.isInvalid() && \"Unexpected PerformCopyInitialization() failure.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 4642, __PRETTY_FUNCTION__)) |
| 4642 | "Unexpected PerformCopyInitialization() failure.")((!ValArg.isInvalid() && "Unexpected PerformCopyInitialization() failure." ) ? static_cast<void> (0) : __assert_fail ("!ValArg.isInvalid() && \"Unexpected PerformCopyInitialization() failure.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 4642, __PRETTY_FUNCTION__)); |
| 4643 | |
| 4644 | return ValArg.getAs<Expr>(); |
| 4645 | } |
| 4646 | |
| 4647 | void Sema::AddLaunchBoundsAttr(SourceRange AttrRange, Decl *D, Expr *MaxThreads, |
| 4648 | Expr *MinBlocks, unsigned SpellingListIndex) { |
| 4649 | CUDALaunchBoundsAttr TmpAttr(AttrRange, Context, MaxThreads, MinBlocks, |
| 4650 | SpellingListIndex); |
| 4651 | MaxThreads = makeLaunchBoundsArgExpr(*this, MaxThreads, TmpAttr, 0); |
| 4652 | if (MaxThreads == nullptr) |
| 4653 | return; |
| 4654 | |
| 4655 | if (MinBlocks) { |
| 4656 | MinBlocks = makeLaunchBoundsArgExpr(*this, MinBlocks, TmpAttr, 1); |
| 4657 | if (MinBlocks == nullptr) |
| 4658 | return; |
| 4659 | } |
| 4660 | |
| 4661 | D->addAttr(::new (Context) CUDALaunchBoundsAttr( |
| 4662 | AttrRange, Context, MaxThreads, MinBlocks, SpellingListIndex)); |
| 4663 | } |
| 4664 | |
| 4665 | static void handleLaunchBoundsAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 4666 | if (!checkAttributeAtLeastNumArgs(S, AL, 1) || |
| 4667 | !checkAttributeAtMostNumArgs(S, AL, 2)) |
| 4668 | return; |
| 4669 | |
| 4670 | S.AddLaunchBoundsAttr(AL.getRange(), D, AL.getArgAsExpr(0), |
| 4671 | AL.getNumArgs() > 1 ? AL.getArgAsExpr(1) : nullptr, |
| 4672 | AL.getAttributeSpellingListIndex()); |
| 4673 | } |
| 4674 | |
| 4675 | static void handleArgumentWithTypeTagAttr(Sema &S, Decl *D, |
| 4676 | const ParsedAttr &AL) { |
| 4677 | if (!AL.isArgIdent(0)) { |
| 4678 | S.Diag(AL.getLoc(), diag::err_attribute_argument_n_type) |
| 4679 | << AL << /* arg num = */ 1 << AANT_ArgumentIdentifier; |
| 4680 | return; |
| 4681 | } |
| 4682 | |
| 4683 | ParamIdx ArgumentIdx; |
| 4684 | if (!checkFunctionOrMethodParameterIndex(S, D, AL, 2, AL.getArgAsExpr(1), |
| 4685 | ArgumentIdx)) |
| 4686 | return; |
| 4687 | |
| 4688 | ParamIdx TypeTagIdx; |
| 4689 | if (!checkFunctionOrMethodParameterIndex(S, D, AL, 3, AL.getArgAsExpr(2), |
| 4690 | TypeTagIdx)) |
| 4691 | return; |
| 4692 | |
| 4693 | bool IsPointer = AL.getName()->getName() == "pointer_with_type_tag"; |
| 4694 | if (IsPointer) { |
| 4695 | // Ensure that buffer has a pointer type. |
| 4696 | unsigned ArgumentIdxAST = ArgumentIdx.getASTIndex(); |
| 4697 | if (ArgumentIdxAST >= getFunctionOrMethodNumParams(D) || |
| 4698 | !getFunctionOrMethodParamType(D, ArgumentIdxAST)->isPointerType()) |
| 4699 | S.Diag(AL.getLoc(), diag::err_attribute_pointers_only) << AL << 0; |
| 4700 | } |
| 4701 | |
| 4702 | D->addAttr(::new (S.Context) ArgumentWithTypeTagAttr( |
| 4703 | AL.getRange(), S.Context, AL.getArgAsIdent(0)->Ident, ArgumentIdx, |
| 4704 | TypeTagIdx, IsPointer, AL.getAttributeSpellingListIndex())); |
| 4705 | } |
| 4706 | |
| 4707 | static void handleTypeTagForDatatypeAttr(Sema &S, Decl *D, |
| 4708 | const ParsedAttr &AL) { |
| 4709 | if (!AL.isArgIdent(0)) { |
| 4710 | S.Diag(AL.getLoc(), diag::err_attribute_argument_n_type) |
| 4711 | << AL << 1 << AANT_ArgumentIdentifier; |
| 4712 | return; |
| 4713 | } |
| 4714 | |
| 4715 | if (!checkAttributeNumArgs(S, AL, 1)) |
| 4716 | return; |
| 4717 | |
| 4718 | if (!isa<VarDecl>(D)) { |
| 4719 | S.Diag(AL.getLoc(), diag::err_attribute_wrong_decl_type) |
| 4720 | << AL << ExpectedVariable; |
| 4721 | return; |
| 4722 | } |
| 4723 | |
| 4724 | IdentifierInfo *PointerKind = AL.getArgAsIdent(0)->Ident; |
| 4725 | TypeSourceInfo *MatchingCTypeLoc = nullptr; |
| 4726 | S.GetTypeFromParser(AL.getMatchingCType(), &MatchingCTypeLoc); |
| 4727 | assert(MatchingCTypeLoc && "no type source info for attribute argument")((MatchingCTypeLoc && "no type source info for attribute argument" ) ? static_cast<void> (0) : __assert_fail ("MatchingCTypeLoc && \"no type source info for attribute argument\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 4727, __PRETTY_FUNCTION__)); |
| 4728 | |
| 4729 | D->addAttr(::new (S.Context) |
| 4730 | TypeTagForDatatypeAttr(AL.getRange(), S.Context, PointerKind, |
| 4731 | MatchingCTypeLoc, |
| 4732 | AL.getLayoutCompatible(), |
| 4733 | AL.getMustBeNull(), |
| 4734 | AL.getAttributeSpellingListIndex())); |
| 4735 | } |
| 4736 | |
| 4737 | static void handleXRayLogArgsAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 4738 | ParamIdx ArgCount; |
| 4739 | |
| 4740 | if (!checkFunctionOrMethodParameterIndex(S, D, AL, 1, AL.getArgAsExpr(0), |
| 4741 | ArgCount, |
| 4742 | true /* CanIndexImplicitThis */)) |
| 4743 | return; |
| 4744 | |
| 4745 | // ArgCount isn't a parameter index [0;n), it's a count [1;n] |
| 4746 | D->addAttr(::new (S.Context) XRayLogArgsAttr( |
| 4747 | AL.getRange(), S.Context, ArgCount.getSourceIndex(), |
| 4748 | AL.getAttributeSpellingListIndex())); |
| 4749 | } |
| 4750 | |
| 4751 | //===----------------------------------------------------------------------===// |
| 4752 | // Checker-specific attribute handlers. |
| 4753 | //===----------------------------------------------------------------------===// |
| 4754 | static bool isValidSubjectOfNSReturnsRetainedAttribute(QualType QT) { |
| 4755 | return QT->isDependentType() || QT->isObjCRetainableType(); |
| 4756 | } |
| 4757 | |
| 4758 | static bool isValidSubjectOfNSAttribute(QualType QT) { |
| 4759 | return QT->isDependentType() || QT->isObjCObjectPointerType() || |
| 4760 | QT->isObjCNSObjectType(); |
| 4761 | } |
| 4762 | |
| 4763 | static bool isValidSubjectOfCFAttribute(QualType QT) { |
| 4764 | return QT->isDependentType() || QT->isPointerType() || |
| 4765 | isValidSubjectOfNSAttribute(QT); |
| 4766 | } |
| 4767 | |
| 4768 | static bool isValidSubjectOfOSAttribute(QualType QT) { |
| 4769 | return QT->isDependentType() || QT->isPointerType(); |
| 4770 | } |
| 4771 | |
| 4772 | void Sema::AddXConsumedAttr(Decl *D, SourceRange SR, unsigned SpellingIndex, |
| 4773 | RetainOwnershipKind K, |
| 4774 | bool IsTemplateInstantiation) { |
| 4775 | ValueDecl *VD = cast<ValueDecl>(D); |
| 4776 | switch (K) { |
| 4777 | case RetainOwnershipKind::OS: |
| 4778 | handleSimpleAttributeWithCheck<OSConsumedAttr>( |
| 4779 | *this, VD, SR, SpellingIndex, &isValidSubjectOfOSAttribute, |
| 4780 | diag::warn_ns_attribute_wrong_parameter_type, |
| 4781 | /*ExtraArgs=*/SR, "os_consumed", /*pointers*/ 1); |
| 4782 | return; |
| 4783 | case RetainOwnershipKind::NS: |
| 4784 | handleSimpleAttributeWithCheck<NSConsumedAttr>( |
| 4785 | *this, VD, SR, SpellingIndex, &isValidSubjectOfNSAttribute, |
| 4786 | |
| 4787 | // These attributes are normally just advisory, but in ARC, ns_consumed |
| 4788 | // is significant. Allow non-dependent code to contain inappropriate |
| 4789 | // attributes even in ARC, but require template instantiations to be |
| 4790 | // set up correctly. |
| 4791 | ((IsTemplateInstantiation && getLangOpts().ObjCAutoRefCount) |
| 4792 | ? diag::err_ns_attribute_wrong_parameter_type |
| 4793 | : diag::warn_ns_attribute_wrong_parameter_type), |
| 4794 | /*ExtraArgs=*/SR, "ns_consumed", /*objc pointers*/ 0); |
| 4795 | return; |
| 4796 | case RetainOwnershipKind::CF: |
| 4797 | handleSimpleAttributeWithCheck<CFConsumedAttr>( |
| 4798 | *this, VD, SR, SpellingIndex, |
| 4799 | &isValidSubjectOfCFAttribute, |
| 4800 | diag::warn_ns_attribute_wrong_parameter_type, |
| 4801 | /*ExtraArgs=*/SR, "cf_consumed", /*pointers*/1); |
| 4802 | return; |
| 4803 | } |
| 4804 | } |
| 4805 | |
| 4806 | static Sema::RetainOwnershipKind |
| 4807 | parsedAttrToRetainOwnershipKind(const ParsedAttr &AL) { |
| 4808 | switch (AL.getKind()) { |
| 4809 | case ParsedAttr::AT_CFConsumed: |
| 4810 | return Sema::RetainOwnershipKind::CF; |
| 4811 | case ParsedAttr::AT_OSConsumed: |
| 4812 | return Sema::RetainOwnershipKind::OS; |
| 4813 | case ParsedAttr::AT_NSConsumed: |
| 4814 | return Sema::RetainOwnershipKind::NS; |
| 4815 | default: |
| 4816 | llvm_unreachable("Wrong argument supplied")::llvm::llvm_unreachable_internal("Wrong argument supplied", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 4816); |
| 4817 | } |
| 4818 | } |
| 4819 | |
| 4820 | bool Sema::checkNSReturnsRetainedReturnType(SourceLocation Loc, QualType QT) { |
| 4821 | if (isValidSubjectOfNSReturnsRetainedAttribute(QT)) |
| 4822 | return false; |
| 4823 | |
| 4824 | Diag(Loc, diag::warn_ns_attribute_wrong_return_type) |
| 4825 | << "'ns_returns_retained'" << 0 << 0; |
| 4826 | return true; |
| 4827 | } |
| 4828 | |
| 4829 | static void handleXReturnsXRetainedAttr(Sema &S, Decl *D, |
| 4830 | const ParsedAttr &AL) { |
| 4831 | QualType ReturnType; |
| 4832 | |
| 4833 | if (const auto *MD = dyn_cast<ObjCMethodDecl>(D)) { |
| 4834 | ReturnType = MD->getReturnType(); |
| 4835 | } else if (S.getLangOpts().ObjCAutoRefCount && hasDeclarator(D) && |
| 4836 | (AL.getKind() == ParsedAttr::AT_NSReturnsRetained)) { |
| 4837 | return; // ignore: was handled as a type attribute |
| 4838 | } else if (const auto *PD = dyn_cast<ObjCPropertyDecl>(D)) { |
| 4839 | ReturnType = PD->getType(); |
| 4840 | } else if (const auto *FD = dyn_cast<FunctionDecl>(D)) { |
| 4841 | ReturnType = FD->getReturnType(); |
| 4842 | } else if (const auto *Param = dyn_cast<ParmVarDecl>(D)) { |
| 4843 | // Attributes on parameters are used for out-parameters, |
| 4844 | // passed as pointers-to-pointers. |
| 4845 | ReturnType = Param->getType()->getPointeeType(); |
| 4846 | if (ReturnType.isNull()) { |
| 4847 | S.Diag(D->getBeginLoc(), diag::warn_ns_attribute_wrong_parameter_type) |
| 4848 | << AL << /*pointer-to-CF-pointer*/ 2 << AL.getRange(); |
| 4849 | return; |
| 4850 | } |
| 4851 | } else if (AL.isUsedAsTypeAttr()) { |
| 4852 | return; |
| 4853 | } else { |
| 4854 | AttributeDeclKind ExpectedDeclKind; |
| 4855 | switch (AL.getKind()) { |
| 4856 | default: llvm_unreachable("invalid ownership attribute")::llvm::llvm_unreachable_internal("invalid ownership attribute" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 4856); |
| 4857 | case ParsedAttr::AT_NSReturnsRetained: |
| 4858 | case ParsedAttr::AT_NSReturnsAutoreleased: |
| 4859 | case ParsedAttr::AT_NSReturnsNotRetained: |
| 4860 | case ParsedAttr::AT_OSReturnsRetained: |
| 4861 | case ParsedAttr::AT_OSReturnsNotRetained: |
| 4862 | ExpectedDeclKind = ExpectedFunctionOrMethod; |
| 4863 | break; |
| 4864 | |
| 4865 | case ParsedAttr::AT_CFReturnsRetained: |
| 4866 | case ParsedAttr::AT_CFReturnsNotRetained: |
| 4867 | ExpectedDeclKind = ExpectedFunctionMethodOrParameter; |
| 4868 | break; |
| 4869 | } |
| 4870 | S.Diag(D->getBeginLoc(), diag::warn_attribute_wrong_decl_type) |
| 4871 | << AL.getRange() << AL << ExpectedDeclKind; |
| 4872 | return; |
| 4873 | } |
| 4874 | |
| 4875 | bool TypeOK; |
| 4876 | bool Cf; |
| 4877 | switch (AL.getKind()) { |
| 4878 | default: llvm_unreachable("invalid ownership attribute")::llvm::llvm_unreachable_internal("invalid ownership attribute" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 4878); |
| 4879 | case ParsedAttr::AT_NSReturnsRetained: |
| 4880 | TypeOK = isValidSubjectOfNSReturnsRetainedAttribute(ReturnType); |
| 4881 | Cf = false; |
| 4882 | break; |
| 4883 | |
| 4884 | case ParsedAttr::AT_NSReturnsAutoreleased: |
| 4885 | case ParsedAttr::AT_NSReturnsNotRetained: |
| 4886 | TypeOK = isValidSubjectOfNSAttribute(ReturnType); |
| 4887 | Cf = false; |
| 4888 | break; |
| 4889 | |
| 4890 | case ParsedAttr::AT_CFReturnsRetained: |
| 4891 | case ParsedAttr::AT_CFReturnsNotRetained: |
| 4892 | TypeOK = isValidSubjectOfCFAttribute(ReturnType); |
| 4893 | Cf = true; |
| 4894 | break; |
| 4895 | |
| 4896 | case ParsedAttr::AT_OSReturnsRetained: |
| 4897 | case ParsedAttr::AT_OSReturnsNotRetained: |
| 4898 | TypeOK = isValidSubjectOfOSAttribute(ReturnType); |
| 4899 | Cf = true; |
| 4900 | break; |
| 4901 | } |
| 4902 | |
| 4903 | if (!TypeOK) { |
| 4904 | if (AL.isUsedAsTypeAttr()) |
| 4905 | return; |
| 4906 | |
| 4907 | if (isa<ParmVarDecl>(D)) { |
| 4908 | S.Diag(D->getBeginLoc(), diag::warn_ns_attribute_wrong_parameter_type) |
| 4909 | << AL << /*pointer-to-CF*/ 2 << AL.getRange(); |
| 4910 | } else { |
| 4911 | // Needs to be kept in sync with warn_ns_attribute_wrong_return_type. |
| 4912 | enum : unsigned { |
| 4913 | Function, |
| 4914 | Method, |
| 4915 | Property |
| 4916 | } SubjectKind = Function; |
| 4917 | if (isa<ObjCMethodDecl>(D)) |
| 4918 | SubjectKind = Method; |
| 4919 | else if (isa<ObjCPropertyDecl>(D)) |
| 4920 | SubjectKind = Property; |
| 4921 | S.Diag(D->getBeginLoc(), diag::warn_ns_attribute_wrong_return_type) |
| 4922 | << AL << SubjectKind << Cf << AL.getRange(); |
| 4923 | } |
| 4924 | return; |
| 4925 | } |
| 4926 | |
| 4927 | switch (AL.getKind()) { |
| 4928 | default: |
| 4929 | llvm_unreachable("invalid ownership attribute")::llvm::llvm_unreachable_internal("invalid ownership attribute" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 4929); |
| 4930 | case ParsedAttr::AT_NSReturnsAutoreleased: |
| 4931 | handleSimpleAttribute<NSReturnsAutoreleasedAttr>(S, D, AL); |
| 4932 | return; |
| 4933 | case ParsedAttr::AT_CFReturnsNotRetained: |
| 4934 | handleSimpleAttribute<CFReturnsNotRetainedAttr>(S, D, AL); |
| 4935 | return; |
| 4936 | case ParsedAttr::AT_NSReturnsNotRetained: |
| 4937 | handleSimpleAttribute<NSReturnsNotRetainedAttr>(S, D, AL); |
| 4938 | return; |
| 4939 | case ParsedAttr::AT_CFReturnsRetained: |
| 4940 | handleSimpleAttribute<CFReturnsRetainedAttr>(S, D, AL); |
| 4941 | return; |
| 4942 | case ParsedAttr::AT_NSReturnsRetained: |
| 4943 | handleSimpleAttribute<NSReturnsRetainedAttr>(S, D, AL); |
| 4944 | return; |
| 4945 | case ParsedAttr::AT_OSReturnsRetained: |
| 4946 | handleSimpleAttribute<OSReturnsRetainedAttr>(S, D, AL); |
| 4947 | return; |
| 4948 | case ParsedAttr::AT_OSReturnsNotRetained: |
| 4949 | handleSimpleAttribute<OSReturnsNotRetainedAttr>(S, D, AL); |
| 4950 | return; |
| 4951 | }; |
| 4952 | } |
| 4953 | |
| 4954 | static void handleObjCReturnsInnerPointerAttr(Sema &S, Decl *D, |
| 4955 | const ParsedAttr &Attrs) { |
| 4956 | const int EP_ObjCMethod = 1; |
| 4957 | const int EP_ObjCProperty = 2; |
| 4958 | |
| 4959 | SourceLocation loc = Attrs.getLoc(); |
| 4960 | QualType resultType; |
| 4961 | if (isa<ObjCMethodDecl>(D)) |
| 4962 | resultType = cast<ObjCMethodDecl>(D)->getReturnType(); |
| 4963 | else |
| 4964 | resultType = cast<ObjCPropertyDecl>(D)->getType(); |
| 4965 | |
| 4966 | if (!resultType->isReferenceType() && |
| 4967 | (!resultType->isPointerType() || resultType->isObjCRetainableType())) { |
| 4968 | S.Diag(D->getBeginLoc(), diag::warn_ns_attribute_wrong_return_type) |
| 4969 | << SourceRange(loc) << Attrs |
| 4970 | << (isa<ObjCMethodDecl>(D) ? EP_ObjCMethod : EP_ObjCProperty) |
| 4971 | << /*non-retainable pointer*/ 2; |
| 4972 | |
| 4973 | // Drop the attribute. |
| 4974 | return; |
| 4975 | } |
| 4976 | |
| 4977 | D->addAttr(::new (S.Context) ObjCReturnsInnerPointerAttr( |
| 4978 | Attrs.getRange(), S.Context, Attrs.getAttributeSpellingListIndex())); |
| 4979 | } |
| 4980 | |
| 4981 | static void handleObjCRequiresSuperAttr(Sema &S, Decl *D, |
| 4982 | const ParsedAttr &Attrs) { |
| 4983 | const auto *Method = cast<ObjCMethodDecl>(D); |
| 4984 | |
| 4985 | const DeclContext *DC = Method->getDeclContext(); |
| 4986 | if (const auto *PDecl = dyn_cast_or_null<ObjCProtocolDecl>(DC)) { |
| 4987 | S.Diag(D->getBeginLoc(), diag::warn_objc_requires_super_protocol) << Attrs |
| 4988 | << 0; |
| 4989 | S.Diag(PDecl->getLocation(), diag::note_protocol_decl); |
| 4990 | return; |
| 4991 | } |
| 4992 | if (Method->getMethodFamily() == OMF_dealloc) { |
| 4993 | S.Diag(D->getBeginLoc(), diag::warn_objc_requires_super_protocol) << Attrs |
| 4994 | << 1; |
| 4995 | return; |
| 4996 | } |
| 4997 | |
| 4998 | D->addAttr(::new (S.Context) ObjCRequiresSuperAttr( |
| 4999 | Attrs.getRange(), S.Context, Attrs.getAttributeSpellingListIndex())); |
| 5000 | } |
| 5001 | |
| 5002 | static void handleObjCBridgeAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5003 | IdentifierLoc *Parm = AL.isArgIdent(0) ? AL.getArgAsIdent(0) : nullptr; |
| 5004 | |
| 5005 | if (!Parm) { |
| 5006 | S.Diag(D->getBeginLoc(), diag::err_objc_attr_not_id) << AL << 0; |
| 5007 | return; |
| 5008 | } |
| 5009 | |
| 5010 | // Typedefs only allow objc_bridge(id) and have some additional checking. |
| 5011 | if (const auto *TD = dyn_cast<TypedefNameDecl>(D)) { |
| 5012 | if (!Parm->Ident->isStr("id")) { |
| 5013 | S.Diag(AL.getLoc(), diag::err_objc_attr_typedef_not_id) << AL; |
| 5014 | return; |
| 5015 | } |
| 5016 | |
| 5017 | // Only allow 'cv void *'. |
| 5018 | QualType T = TD->getUnderlyingType(); |
| 5019 | if (!T->isVoidPointerType()) { |
| 5020 | S.Diag(AL.getLoc(), diag::err_objc_attr_typedef_not_void_pointer); |
| 5021 | return; |
| 5022 | } |
| 5023 | } |
| 5024 | |
| 5025 | D->addAttr(::new (S.Context) |
| 5026 | ObjCBridgeAttr(AL.getRange(), S.Context, Parm->Ident, |
| 5027 | AL.getAttributeSpellingListIndex())); |
| 5028 | } |
| 5029 | |
| 5030 | static void handleObjCBridgeMutableAttr(Sema &S, Decl *D, |
| 5031 | const ParsedAttr &AL) { |
| 5032 | IdentifierLoc *Parm = AL.isArgIdent(0) ? AL.getArgAsIdent(0) : nullptr; |
| 5033 | |
| 5034 | if (!Parm) { |
| 5035 | S.Diag(D->getBeginLoc(), diag::err_objc_attr_not_id) << AL << 0; |
| 5036 | return; |
| 5037 | } |
| 5038 | |
| 5039 | D->addAttr(::new (S.Context) |
| 5040 | ObjCBridgeMutableAttr(AL.getRange(), S.Context, Parm->Ident, |
| 5041 | AL.getAttributeSpellingListIndex())); |
| 5042 | } |
| 5043 | |
| 5044 | static void handleObjCBridgeRelatedAttr(Sema &S, Decl *D, |
| 5045 | const ParsedAttr &AL) { |
| 5046 | IdentifierInfo *RelatedClass = |
| 5047 | AL.isArgIdent(0) ? AL.getArgAsIdent(0)->Ident : nullptr; |
| 5048 | if (!RelatedClass) { |
| 5049 | S.Diag(D->getBeginLoc(), diag::err_objc_attr_not_id) << AL << 0; |
| 5050 | return; |
| 5051 | } |
| 5052 | IdentifierInfo *ClassMethod = |
| 5053 | AL.getArgAsIdent(1) ? AL.getArgAsIdent(1)->Ident : nullptr; |
| 5054 | IdentifierInfo *InstanceMethod = |
| 5055 | AL.getArgAsIdent(2) ? AL.getArgAsIdent(2)->Ident : nullptr; |
| 5056 | D->addAttr(::new (S.Context) |
| 5057 | ObjCBridgeRelatedAttr(AL.getRange(), S.Context, RelatedClass, |
| 5058 | ClassMethod, InstanceMethod, |
| 5059 | AL.getAttributeSpellingListIndex())); |
| 5060 | } |
| 5061 | |
| 5062 | static void handleObjCDesignatedInitializer(Sema &S, Decl *D, |
| 5063 | const ParsedAttr &AL) { |
| 5064 | ObjCInterfaceDecl *IFace; |
| 5065 | if (auto *CatDecl = dyn_cast<ObjCCategoryDecl>(D->getDeclContext())) |
| 5066 | IFace = CatDecl->getClassInterface(); |
| 5067 | else |
| 5068 | IFace = cast<ObjCInterfaceDecl>(D->getDeclContext()); |
| 5069 | |
| 5070 | if (!IFace) |
| 5071 | return; |
| 5072 | |
| 5073 | IFace->setHasDesignatedInitializers(); |
| 5074 | D->addAttr(::new (S.Context) |
| 5075 | ObjCDesignatedInitializerAttr(AL.getRange(), S.Context, |
| 5076 | AL.getAttributeSpellingListIndex())); |
| 5077 | } |
| 5078 | |
| 5079 | static void handleObjCRuntimeName(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5080 | StringRef MetaDataName; |
| 5081 | if (!S.checkStringLiteralArgumentAttr(AL, 0, MetaDataName)) |
| 5082 | return; |
| 5083 | D->addAttr(::new (S.Context) |
| 5084 | ObjCRuntimeNameAttr(AL.getRange(), S.Context, |
| 5085 | MetaDataName, |
| 5086 | AL.getAttributeSpellingListIndex())); |
| 5087 | } |
| 5088 | |
| 5089 | // When a user wants to use objc_boxable with a union or struct |
| 5090 | // but they don't have access to the declaration (legacy/third-party code) |
| 5091 | // then they can 'enable' this feature with a typedef: |
| 5092 | // typedef struct __attribute((objc_boxable)) legacy_struct legacy_struct; |
| 5093 | static void handleObjCBoxable(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5094 | bool notify = false; |
| 5095 | |
| 5096 | auto *RD = dyn_cast<RecordDecl>(D); |
| 5097 | if (RD && RD->getDefinition()) { |
| 5098 | RD = RD->getDefinition(); |
| 5099 | notify = true; |
| 5100 | } |
| 5101 | |
| 5102 | if (RD) { |
| 5103 | ObjCBoxableAttr *BoxableAttr = ::new (S.Context) |
| 5104 | ObjCBoxableAttr(AL.getRange(), S.Context, |
| 5105 | AL.getAttributeSpellingListIndex()); |
| 5106 | RD->addAttr(BoxableAttr); |
| 5107 | if (notify) { |
| 5108 | // we need to notify ASTReader/ASTWriter about |
| 5109 | // modification of existing declaration |
| 5110 | if (ASTMutationListener *L = S.getASTMutationListener()) |
| 5111 | L->AddedAttributeToRecord(BoxableAttr, RD); |
| 5112 | } |
| 5113 | } |
| 5114 | } |
| 5115 | |
| 5116 | static void handleObjCOwnershipAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5117 | if (hasDeclarator(D)) return; |
| 5118 | |
| 5119 | S.Diag(D->getBeginLoc(), diag::err_attribute_wrong_decl_type) |
| 5120 | << AL.getRange() << AL << ExpectedVariable; |
| 5121 | } |
| 5122 | |
| 5123 | static void handleObjCPreciseLifetimeAttr(Sema &S, Decl *D, |
| 5124 | const ParsedAttr &AL) { |
| 5125 | const auto *VD = cast<ValueDecl>(D); |
| 5126 | QualType QT = VD->getType(); |
| 5127 | |
| 5128 | if (!QT->isDependentType() && |
| 5129 | !QT->isObjCLifetimeType()) { |
| 5130 | S.Diag(AL.getLoc(), diag::err_objc_precise_lifetime_bad_type) |
| 5131 | << QT; |
| 5132 | return; |
| 5133 | } |
| 5134 | |
| 5135 | Qualifiers::ObjCLifetime Lifetime = QT.getObjCLifetime(); |
| 5136 | |
| 5137 | // If we have no lifetime yet, check the lifetime we're presumably |
| 5138 | // going to infer. |
| 5139 | if (Lifetime == Qualifiers::OCL_None && !QT->isDependentType()) |
| 5140 | Lifetime = QT->getObjCARCImplicitLifetime(); |
| 5141 | |
| 5142 | switch (Lifetime) { |
| 5143 | case Qualifiers::OCL_None: |
| 5144 | assert(QT->isDependentType() &&((QT->isDependentType() && "didn't infer lifetime for non-dependent type?" ) ? static_cast<void> (0) : __assert_fail ("QT->isDependentType() && \"didn't infer lifetime for non-dependent type?\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 5145, __PRETTY_FUNCTION__)) |
| 5145 | "didn't infer lifetime for non-dependent type?")((QT->isDependentType() && "didn't infer lifetime for non-dependent type?" ) ? static_cast<void> (0) : __assert_fail ("QT->isDependentType() && \"didn't infer lifetime for non-dependent type?\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 5145, __PRETTY_FUNCTION__)); |
| 5146 | break; |
| 5147 | |
| 5148 | case Qualifiers::OCL_Weak: // meaningful |
| 5149 | case Qualifiers::OCL_Strong: // meaningful |
| 5150 | break; |
| 5151 | |
| 5152 | case Qualifiers::OCL_ExplicitNone: |
| 5153 | case Qualifiers::OCL_Autoreleasing: |
| 5154 | S.Diag(AL.getLoc(), diag::warn_objc_precise_lifetime_meaningless) |
| 5155 | << (Lifetime == Qualifiers::OCL_Autoreleasing); |
| 5156 | break; |
| 5157 | } |
| 5158 | |
| 5159 | D->addAttr(::new (S.Context) |
| 5160 | ObjCPreciseLifetimeAttr(AL.getRange(), S.Context, |
| 5161 | AL.getAttributeSpellingListIndex())); |
| 5162 | } |
| 5163 | |
| 5164 | //===----------------------------------------------------------------------===// |
| 5165 | // Microsoft specific attribute handlers. |
| 5166 | //===----------------------------------------------------------------------===// |
| 5167 | |
| 5168 | UuidAttr *Sema::mergeUuidAttr(Decl *D, SourceRange Range, |
| 5169 | unsigned AttrSpellingListIndex, StringRef Uuid) { |
| 5170 | if (const auto *UA = D->getAttr<UuidAttr>()) { |
| 5171 | if (UA->getGuid().equals_lower(Uuid)) |
| 5172 | return nullptr; |
| 5173 | Diag(UA->getLocation(), diag::err_mismatched_uuid); |
| 5174 | Diag(Range.getBegin(), diag::note_previous_uuid); |
| 5175 | D->dropAttr<UuidAttr>(); |
| 5176 | } |
| 5177 | |
| 5178 | return ::new (Context) UuidAttr(Range, Context, Uuid, AttrSpellingListIndex); |
| 5179 | } |
| 5180 | |
| 5181 | static void handleUuidAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5182 | if (!S.LangOpts.CPlusPlus) { |
| 5183 | S.Diag(AL.getLoc(), diag::err_attribute_not_supported_in_lang) |
| 5184 | << AL << AttributeLangSupport::C; |
| 5185 | return; |
| 5186 | } |
| 5187 | |
| 5188 | StringRef StrRef; |
| 5189 | SourceLocation LiteralLoc; |
| 5190 | if (!S.checkStringLiteralArgumentAttr(AL, 0, StrRef, &LiteralLoc)) |
| 5191 | return; |
| 5192 | |
| 5193 | // GUID format is "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX" or |
| 5194 | // "{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}", normalize to the former. |
| 5195 | if (StrRef.size() == 38 && StrRef.front() == '{' && StrRef.back() == '}') |
| 5196 | StrRef = StrRef.drop_front().drop_back(); |
| 5197 | |
| 5198 | // Validate GUID length. |
| 5199 | if (StrRef.size() != 36) { |
| 5200 | S.Diag(LiteralLoc, diag::err_attribute_uuid_malformed_guid); |
| 5201 | return; |
| 5202 | } |
| 5203 | |
| 5204 | for (unsigned i = 0; i < 36; ++i) { |
| 5205 | if (i == 8 || i == 13 || i == 18 || i == 23) { |
| 5206 | if (StrRef[i] != '-') { |
| 5207 | S.Diag(LiteralLoc, diag::err_attribute_uuid_malformed_guid); |
| 5208 | return; |
| 5209 | } |
| 5210 | } else if (!isHexDigit(StrRef[i])) { |
| 5211 | S.Diag(LiteralLoc, diag::err_attribute_uuid_malformed_guid); |
| 5212 | return; |
| 5213 | } |
| 5214 | } |
| 5215 | |
| 5216 | // FIXME: It'd be nice to also emit a fixit removing uuid(...) (and, if it's |
| 5217 | // the only thing in the [] list, the [] too), and add an insertion of |
| 5218 | // __declspec(uuid(...)). But sadly, neither the SourceLocs of the commas |
| 5219 | // separating attributes nor of the [ and the ] are in the AST. |
| 5220 | // Cf "SourceLocations of attribute list delimiters - [[ ... , ... ]] etc" |
| 5221 | // on cfe-dev. |
| 5222 | if (AL.isMicrosoftAttribute()) // Check for [uuid(...)] spelling. |
| 5223 | S.Diag(AL.getLoc(), diag::warn_atl_uuid_deprecated); |
| 5224 | |
| 5225 | UuidAttr *UA = S.mergeUuidAttr(D, AL.getRange(), |
| 5226 | AL.getAttributeSpellingListIndex(), StrRef); |
| 5227 | if (UA) |
| 5228 | D->addAttr(UA); |
| 5229 | } |
| 5230 | |
| 5231 | static void handleMSInheritanceAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5232 | if (!S.LangOpts.CPlusPlus) { |
| 5233 | S.Diag(AL.getLoc(), diag::err_attribute_not_supported_in_lang) |
| 5234 | << AL << AttributeLangSupport::C; |
| 5235 | return; |
| 5236 | } |
| 5237 | MSInheritanceAttr *IA = S.mergeMSInheritanceAttr( |
| 5238 | D, AL.getRange(), /*BestCase=*/true, |
| 5239 | AL.getAttributeSpellingListIndex(), |
| 5240 | (MSInheritanceAttr::Spelling)AL.getSemanticSpelling()); |
| 5241 | if (IA) { |
| 5242 | D->addAttr(IA); |
| 5243 | S.Consumer.AssignInheritanceModel(cast<CXXRecordDecl>(D)); |
| 5244 | } |
| 5245 | } |
| 5246 | |
| 5247 | static void handleDeclspecThreadAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5248 | const auto *VD = cast<VarDecl>(D); |
| 5249 | if (!S.Context.getTargetInfo().isTLSSupported()) { |
| 5250 | S.Diag(AL.getLoc(), diag::err_thread_unsupported); |
| 5251 | return; |
| 5252 | } |
| 5253 | if (VD->getTSCSpec() != TSCS_unspecified) { |
| 5254 | S.Diag(AL.getLoc(), diag::err_declspec_thread_on_thread_variable); |
| 5255 | return; |
| 5256 | } |
| 5257 | if (VD->hasLocalStorage()) { |
| 5258 | S.Diag(AL.getLoc(), diag::err_thread_non_global) << "__declspec(thread)"; |
| 5259 | return; |
| 5260 | } |
| 5261 | D->addAttr(::new (S.Context) ThreadAttr(AL.getRange(), S.Context, |
| 5262 | AL.getAttributeSpellingListIndex())); |
| 5263 | } |
| 5264 | |
| 5265 | static void handleAbiTagAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5266 | SmallVector<StringRef, 4> Tags; |
| 5267 | for (unsigned I = 0, E = AL.getNumArgs(); I != E; ++I) { |
| 5268 | StringRef Tag; |
| 5269 | if (!S.checkStringLiteralArgumentAttr(AL, I, Tag)) |
| 5270 | return; |
| 5271 | Tags.push_back(Tag); |
| 5272 | } |
| 5273 | |
| 5274 | if (const auto *NS = dyn_cast<NamespaceDecl>(D)) { |
| 5275 | if (!NS->isInline()) { |
| 5276 | S.Diag(AL.getLoc(), diag::warn_attr_abi_tag_namespace) << 0; |
| 5277 | return; |
| 5278 | } |
| 5279 | if (NS->isAnonymousNamespace()) { |
| 5280 | S.Diag(AL.getLoc(), diag::warn_attr_abi_tag_namespace) << 1; |
| 5281 | return; |
| 5282 | } |
| 5283 | if (AL.getNumArgs() == 0) |
| 5284 | Tags.push_back(NS->getName()); |
| 5285 | } else if (!checkAttributeAtLeastNumArgs(S, AL, 1)) |
| 5286 | return; |
| 5287 | |
| 5288 | // Store tags sorted and without duplicates. |
| 5289 | llvm::sort(Tags); |
| 5290 | Tags.erase(std::unique(Tags.begin(), Tags.end()), Tags.end()); |
| 5291 | |
| 5292 | D->addAttr(::new (S.Context) |
| 5293 | AbiTagAttr(AL.getRange(), S.Context, Tags.data(), Tags.size(), |
| 5294 | AL.getAttributeSpellingListIndex())); |
| 5295 | } |
| 5296 | |
| 5297 | static void handleARMInterruptAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5298 | // Check the attribute arguments. |
| 5299 | if (AL.getNumArgs() > 1) { |
| 5300 | S.Diag(AL.getLoc(), diag::err_attribute_too_many_arguments) << AL << 1; |
| 5301 | return; |
| 5302 | } |
| 5303 | |
| 5304 | StringRef Str; |
| 5305 | SourceLocation ArgLoc; |
| 5306 | |
| 5307 | if (AL.getNumArgs() == 0) |
| 5308 | Str = ""; |
| 5309 | else if (!S.checkStringLiteralArgumentAttr(AL, 0, Str, &ArgLoc)) |
| 5310 | return; |
| 5311 | |
| 5312 | ARMInterruptAttr::InterruptType Kind; |
| 5313 | if (!ARMInterruptAttr::ConvertStrToInterruptType(Str, Kind)) { |
| 5314 | S.Diag(AL.getLoc(), diag::warn_attribute_type_not_supported) << AL << Str |
| 5315 | << ArgLoc; |
| 5316 | return; |
| 5317 | } |
| 5318 | |
| 5319 | unsigned Index = AL.getAttributeSpellingListIndex(); |
| 5320 | D->addAttr(::new (S.Context) |
| 5321 | ARMInterruptAttr(AL.getLoc(), S.Context, Kind, Index)); |
| 5322 | } |
| 5323 | |
| 5324 | static void handleMSP430InterruptAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5325 | if (!checkAttributeNumArgs(S, AL, 1)) |
| 5326 | return; |
| 5327 | |
| 5328 | if (!AL.isArgExpr(0)) { |
| 5329 | S.Diag(AL.getLoc(), diag::err_attribute_argument_type) |
| 5330 | << AL << AANT_ArgumentIntegerConstant; |
| 5331 | return; |
| 5332 | } |
| 5333 | |
| 5334 | // FIXME: Check for decl - it should be void ()(void). |
| 5335 | |
| 5336 | Expr *NumParamsExpr = static_cast<Expr *>(AL.getArgAsExpr(0)); |
| 5337 | llvm::APSInt NumParams(32); |
| 5338 | if (!NumParamsExpr->isIntegerConstantExpr(NumParams, S.Context)) { |
| 5339 | S.Diag(AL.getLoc(), diag::err_attribute_argument_type) |
| 5340 | << AL << AANT_ArgumentIntegerConstant |
| 5341 | << NumParamsExpr->getSourceRange(); |
| 5342 | return; |
| 5343 | } |
| 5344 | |
| 5345 | unsigned Num = NumParams.getLimitedValue(255); |
| 5346 | if ((Num & 1) || Num > 30) { |
| 5347 | S.Diag(AL.getLoc(), diag::err_attribute_argument_out_of_bounds) |
| 5348 | << AL << (int)NumParams.getSExtValue() |
| 5349 | << NumParamsExpr->getSourceRange(); |
| 5350 | return; |
| 5351 | } |
| 5352 | |
| 5353 | D->addAttr(::new (S.Context) |
| 5354 | MSP430InterruptAttr(AL.getLoc(), S.Context, Num, |
| 5355 | AL.getAttributeSpellingListIndex())); |
| 5356 | D->addAttr(UsedAttr::CreateImplicit(S.Context)); |
| 5357 | } |
| 5358 | |
| 5359 | static void handleMipsInterruptAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5360 | // Only one optional argument permitted. |
| 5361 | if (AL.getNumArgs() > 1) { |
| 5362 | S.Diag(AL.getLoc(), diag::err_attribute_too_many_arguments) << AL << 1; |
| 5363 | return; |
| 5364 | } |
| 5365 | |
| 5366 | StringRef Str; |
| 5367 | SourceLocation ArgLoc; |
| 5368 | |
| 5369 | if (AL.getNumArgs() == 0) |
| 5370 | Str = ""; |
| 5371 | else if (!S.checkStringLiteralArgumentAttr(AL, 0, Str, &ArgLoc)) |
| 5372 | return; |
| 5373 | |
| 5374 | // Semantic checks for a function with the 'interrupt' attribute for MIPS: |
| 5375 | // a) Must be a function. |
| 5376 | // b) Must have no parameters. |
| 5377 | // c) Must have the 'void' return type. |
| 5378 | // d) Cannot have the 'mips16' attribute, as that instruction set |
| 5379 | // lacks the 'eret' instruction. |
| 5380 | // e) The attribute itself must either have no argument or one of the |
| 5381 | // valid interrupt types, see [MipsInterruptDocs]. |
| 5382 | |
| 5383 | if (!isFunctionOrMethod(D)) { |
| 5384 | S.Diag(D->getLocation(), diag::warn_attribute_wrong_decl_type) |
| 5385 | << "'interrupt'" << ExpectedFunctionOrMethod; |
| 5386 | return; |
| 5387 | } |
| 5388 | |
| 5389 | if (hasFunctionProto(D) && getFunctionOrMethodNumParams(D) != 0) { |
| 5390 | S.Diag(D->getLocation(), diag::warn_mips_interrupt_attribute) |
| 5391 | << 0; |
| 5392 | return; |
| 5393 | } |
| 5394 | |
| 5395 | if (!getFunctionOrMethodResultType(D)->isVoidType()) { |
| 5396 | S.Diag(D->getLocation(), diag::warn_mips_interrupt_attribute) |
| 5397 | << 1; |
| 5398 | return; |
| 5399 | } |
| 5400 | |
| 5401 | if (checkAttrMutualExclusion<Mips16Attr>(S, D, AL)) |
| 5402 | return; |
| 5403 | |
| 5404 | MipsInterruptAttr::InterruptType Kind; |
| 5405 | if (!MipsInterruptAttr::ConvertStrToInterruptType(Str, Kind)) { |
| 5406 | S.Diag(AL.getLoc(), diag::warn_attribute_type_not_supported) |
| 5407 | << AL << "'" + std::string(Str) + "'"; |
| 5408 | return; |
| 5409 | } |
| 5410 | |
| 5411 | D->addAttr(::new (S.Context) MipsInterruptAttr( |
| 5412 | AL.getLoc(), S.Context, Kind, AL.getAttributeSpellingListIndex())); |
| 5413 | } |
| 5414 | |
| 5415 | static void handleAnyX86InterruptAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5416 | // Semantic checks for a function with the 'interrupt' attribute. |
| 5417 | // a) Must be a function. |
| 5418 | // b) Must have the 'void' return type. |
| 5419 | // c) Must take 1 or 2 arguments. |
| 5420 | // d) The 1st argument must be a pointer. |
| 5421 | // e) The 2nd argument (if any) must be an unsigned integer. |
| 5422 | if (!isFunctionOrMethod(D) || !hasFunctionProto(D) || isInstanceMethod(D) || |
| 5423 | CXXMethodDecl::isStaticOverloadedOperator( |
| 5424 | cast<NamedDecl>(D)->getDeclName().getCXXOverloadedOperator())) { |
| 5425 | S.Diag(AL.getLoc(), diag::warn_attribute_wrong_decl_type) |
| 5426 | << AL << ExpectedFunctionWithProtoType; |
| 5427 | return; |
| 5428 | } |
| 5429 | // Interrupt handler must have void return type. |
| 5430 | if (!getFunctionOrMethodResultType(D)->isVoidType()) { |
| 5431 | S.Diag(getFunctionOrMethodResultSourceRange(D).getBegin(), |
| 5432 | diag::err_anyx86_interrupt_attribute) |
| 5433 | << (S.Context.getTargetInfo().getTriple().getArch() == llvm::Triple::x86 |
| 5434 | ? 0 |
| 5435 | : 1) |
| 5436 | << 0; |
| 5437 | return; |
| 5438 | } |
| 5439 | // Interrupt handler must have 1 or 2 parameters. |
| 5440 | unsigned NumParams = getFunctionOrMethodNumParams(D); |
| 5441 | if (NumParams < 1 || NumParams > 2) { |
| 5442 | S.Diag(D->getBeginLoc(), diag::err_anyx86_interrupt_attribute) |
| 5443 | << (S.Context.getTargetInfo().getTriple().getArch() == llvm::Triple::x86 |
| 5444 | ? 0 |
| 5445 | : 1) |
| 5446 | << 1; |
| 5447 | return; |
| 5448 | } |
| 5449 | // The first argument must be a pointer. |
| 5450 | if (!getFunctionOrMethodParamType(D, 0)->isPointerType()) { |
| 5451 | S.Diag(getFunctionOrMethodParamRange(D, 0).getBegin(), |
| 5452 | diag::err_anyx86_interrupt_attribute) |
| 5453 | << (S.Context.getTargetInfo().getTriple().getArch() == llvm::Triple::x86 |
| 5454 | ? 0 |
| 5455 | : 1) |
| 5456 | << 2; |
| 5457 | return; |
| 5458 | } |
| 5459 | // The second argument, if present, must be an unsigned integer. |
| 5460 | unsigned TypeSize = |
| 5461 | S.Context.getTargetInfo().getTriple().getArch() == llvm::Triple::x86_64 |
| 5462 | ? 64 |
| 5463 | : 32; |
| 5464 | if (NumParams == 2 && |
| 5465 | (!getFunctionOrMethodParamType(D, 1)->isUnsignedIntegerType() || |
| 5466 | S.Context.getTypeSize(getFunctionOrMethodParamType(D, 1)) != TypeSize)) { |
| 5467 | S.Diag(getFunctionOrMethodParamRange(D, 1).getBegin(), |
| 5468 | diag::err_anyx86_interrupt_attribute) |
| 5469 | << (S.Context.getTargetInfo().getTriple().getArch() == llvm::Triple::x86 |
| 5470 | ? 0 |
| 5471 | : 1) |
| 5472 | << 3 << S.Context.getIntTypeForBitwidth(TypeSize, /*Signed=*/false); |
| 5473 | return; |
| 5474 | } |
| 5475 | D->addAttr(::new (S.Context) AnyX86InterruptAttr( |
| 5476 | AL.getLoc(), S.Context, AL.getAttributeSpellingListIndex())); |
| 5477 | D->addAttr(UsedAttr::CreateImplicit(S.Context)); |
| 5478 | } |
| 5479 | |
| 5480 | static void handleAVRInterruptAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5481 | if (!isFunctionOrMethod(D)) { |
| 5482 | S.Diag(D->getLocation(), diag::warn_attribute_wrong_decl_type) |
| 5483 | << "'interrupt'" << ExpectedFunction; |
| 5484 | return; |
| 5485 | } |
| 5486 | |
| 5487 | if (!checkAttributeNumArgs(S, AL, 0)) |
| 5488 | return; |
| 5489 | |
| 5490 | handleSimpleAttribute<AVRInterruptAttr>(S, D, AL); |
| 5491 | } |
| 5492 | |
| 5493 | static void handleAVRSignalAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5494 | if (!isFunctionOrMethod(D)) { |
| 5495 | S.Diag(D->getLocation(), diag::warn_attribute_wrong_decl_type) |
| 5496 | << "'signal'" << ExpectedFunction; |
| 5497 | return; |
| 5498 | } |
| 5499 | |
| 5500 | if (!checkAttributeNumArgs(S, AL, 0)) |
| 5501 | return; |
| 5502 | |
| 5503 | handleSimpleAttribute<AVRSignalAttr>(S, D, AL); |
| 5504 | } |
| 5505 | |
| 5506 | |
| 5507 | static void handleRISCVInterruptAttr(Sema &S, Decl *D, |
| 5508 | const ParsedAttr &AL) { |
| 5509 | // Warn about repeated attributes. |
| 5510 | if (const auto *A = D->getAttr<RISCVInterruptAttr>()) { |
| 5511 | S.Diag(AL.getRange().getBegin(), |
| 5512 | diag::warn_riscv_repeated_interrupt_attribute); |
| 5513 | S.Diag(A->getLocation(), diag::note_riscv_repeated_interrupt_attribute); |
| 5514 | return; |
| 5515 | } |
| 5516 | |
| 5517 | // Check the attribute argument. Argument is optional. |
| 5518 | if (!checkAttributeAtMostNumArgs(S, AL, 1)) |
| 5519 | return; |
| 5520 | |
| 5521 | StringRef Str; |
| 5522 | SourceLocation ArgLoc; |
| 5523 | |
| 5524 | // 'machine'is the default interrupt mode. |
| 5525 | if (AL.getNumArgs() == 0) |
| 5526 | Str = "machine"; |
| 5527 | else if (!S.checkStringLiteralArgumentAttr(AL, 0, Str, &ArgLoc)) |
| 5528 | return; |
| 5529 | |
| 5530 | // Semantic checks for a function with the 'interrupt' attribute: |
| 5531 | // - Must be a function. |
| 5532 | // - Must have no parameters. |
| 5533 | // - Must have the 'void' return type. |
| 5534 | // - The attribute itself must either have no argument or one of the |
| 5535 | // valid interrupt types, see [RISCVInterruptDocs]. |
| 5536 | |
| 5537 | if (D->getFunctionType() == nullptr) { |
| 5538 | S.Diag(D->getLocation(), diag::warn_attribute_wrong_decl_type) |
| 5539 | << "'interrupt'" << ExpectedFunction; |
| 5540 | return; |
| 5541 | } |
| 5542 | |
| 5543 | if (hasFunctionProto(D) && getFunctionOrMethodNumParams(D) != 0) { |
| 5544 | S.Diag(D->getLocation(), diag::warn_riscv_interrupt_attribute) << 0; |
| 5545 | return; |
| 5546 | } |
| 5547 | |
| 5548 | if (!getFunctionOrMethodResultType(D)->isVoidType()) { |
| 5549 | S.Diag(D->getLocation(), diag::warn_riscv_interrupt_attribute) << 1; |
| 5550 | return; |
| 5551 | } |
| 5552 | |
| 5553 | RISCVInterruptAttr::InterruptType Kind; |
| 5554 | if (!RISCVInterruptAttr::ConvertStrToInterruptType(Str, Kind)) { |
| 5555 | S.Diag(AL.getLoc(), diag::warn_attribute_type_not_supported) << AL << Str |
| 5556 | << ArgLoc; |
| 5557 | return; |
| 5558 | } |
| 5559 | |
| 5560 | D->addAttr(::new (S.Context) RISCVInterruptAttr( |
| 5561 | AL.getLoc(), S.Context, Kind, AL.getAttributeSpellingListIndex())); |
| 5562 | } |
| 5563 | |
| 5564 | static void handleInterruptAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5565 | // Dispatch the interrupt attribute based on the current target. |
| 5566 | switch (S.Context.getTargetInfo().getTriple().getArch()) { |
| 5567 | case llvm::Triple::msp430: |
| 5568 | handleMSP430InterruptAttr(S, D, AL); |
| 5569 | break; |
| 5570 | case llvm::Triple::mipsel: |
| 5571 | case llvm::Triple::mips: |
| 5572 | handleMipsInterruptAttr(S, D, AL); |
| 5573 | break; |
| 5574 | case llvm::Triple::x86: |
| 5575 | case llvm::Triple::x86_64: |
| 5576 | handleAnyX86InterruptAttr(S, D, AL); |
| 5577 | break; |
| 5578 | case llvm::Triple::avr: |
| 5579 | handleAVRInterruptAttr(S, D, AL); |
| 5580 | break; |
| 5581 | case llvm::Triple::riscv32: |
| 5582 | case llvm::Triple::riscv64: |
| 5583 | handleRISCVInterruptAttr(S, D, AL); |
| 5584 | break; |
| 5585 | default: |
| 5586 | handleARMInterruptAttr(S, D, AL); |
| 5587 | break; |
| 5588 | } |
| 5589 | } |
| 5590 | |
| 5591 | static void handleAMDGPUFlatWorkGroupSizeAttr(Sema &S, Decl *D, |
| 5592 | const ParsedAttr &AL) { |
| 5593 | uint32_t Min = 0; |
| 5594 | Expr *MinExpr = AL.getArgAsExpr(0); |
| 5595 | if (!checkUInt32Argument(S, AL, MinExpr, Min)) |
| 5596 | return; |
| 5597 | |
| 5598 | uint32_t Max = 0; |
| 5599 | Expr *MaxExpr = AL.getArgAsExpr(1); |
| 5600 | if (!checkUInt32Argument(S, AL, MaxExpr, Max)) |
| 5601 | return; |
| 5602 | |
| 5603 | if (Min == 0 && Max != 0) { |
| 5604 | S.Diag(AL.getLoc(), diag::err_attribute_argument_invalid) << AL << 0; |
| 5605 | return; |
| 5606 | } |
| 5607 | if (Min > Max) { |
| 5608 | S.Diag(AL.getLoc(), diag::err_attribute_argument_invalid) << AL << 1; |
| 5609 | return; |
| 5610 | } |
| 5611 | |
| 5612 | D->addAttr(::new (S.Context) |
| 5613 | AMDGPUFlatWorkGroupSizeAttr(AL.getLoc(), S.Context, Min, Max, |
| 5614 | AL.getAttributeSpellingListIndex())); |
| 5615 | } |
| 5616 | |
| 5617 | static void handleAMDGPUWavesPerEUAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5618 | uint32_t Min = 0; |
| 5619 | Expr *MinExpr = AL.getArgAsExpr(0); |
| 5620 | if (!checkUInt32Argument(S, AL, MinExpr, Min)) |
| 5621 | return; |
| 5622 | |
| 5623 | uint32_t Max = 0; |
| 5624 | if (AL.getNumArgs() == 2) { |
| 5625 | Expr *MaxExpr = AL.getArgAsExpr(1); |
| 5626 | if (!checkUInt32Argument(S, AL, MaxExpr, Max)) |
| 5627 | return; |
| 5628 | } |
| 5629 | |
| 5630 | if (Min == 0 && Max != 0) { |
| 5631 | S.Diag(AL.getLoc(), diag::err_attribute_argument_invalid) << AL << 0; |
| 5632 | return; |
| 5633 | } |
| 5634 | if (Max != 0 && Min > Max) { |
| 5635 | S.Diag(AL.getLoc(), diag::err_attribute_argument_invalid) << AL << 1; |
| 5636 | return; |
| 5637 | } |
| 5638 | |
| 5639 | D->addAttr(::new (S.Context) |
| 5640 | AMDGPUWavesPerEUAttr(AL.getLoc(), S.Context, Min, Max, |
| 5641 | AL.getAttributeSpellingListIndex())); |
| 5642 | } |
| 5643 | |
| 5644 | static void handleAMDGPUNumSGPRAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5645 | uint32_t NumSGPR = 0; |
| 5646 | Expr *NumSGPRExpr = AL.getArgAsExpr(0); |
| 5647 | if (!checkUInt32Argument(S, AL, NumSGPRExpr, NumSGPR)) |
| 5648 | return; |
| 5649 | |
| 5650 | D->addAttr(::new (S.Context) |
| 5651 | AMDGPUNumSGPRAttr(AL.getLoc(), S.Context, NumSGPR, |
| 5652 | AL.getAttributeSpellingListIndex())); |
| 5653 | } |
| 5654 | |
| 5655 | static void handleAMDGPUNumVGPRAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5656 | uint32_t NumVGPR = 0; |
| 5657 | Expr *NumVGPRExpr = AL.getArgAsExpr(0); |
| 5658 | if (!checkUInt32Argument(S, AL, NumVGPRExpr, NumVGPR)) |
| 5659 | return; |
| 5660 | |
| 5661 | D->addAttr(::new (S.Context) |
| 5662 | AMDGPUNumVGPRAttr(AL.getLoc(), S.Context, NumVGPR, |
| 5663 | AL.getAttributeSpellingListIndex())); |
| 5664 | } |
| 5665 | |
| 5666 | static void handleX86ForceAlignArgPointerAttr(Sema &S, Decl *D, |
| 5667 | const ParsedAttr &AL) { |
| 5668 | // If we try to apply it to a function pointer, don't warn, but don't |
| 5669 | // do anything, either. It doesn't matter anyway, because there's nothing |
| 5670 | // special about calling a force_align_arg_pointer function. |
| 5671 | const auto *VD = dyn_cast<ValueDecl>(D); |
| 5672 | if (VD && VD->getType()->isFunctionPointerType()) |
| 5673 | return; |
| 5674 | // Also don't warn on function pointer typedefs. |
| 5675 | const auto *TD = dyn_cast<TypedefNameDecl>(D); |
| 5676 | if (TD && (TD->getUnderlyingType()->isFunctionPointerType() || |
| 5677 | TD->getUnderlyingType()->isFunctionType())) |
| 5678 | return; |
| 5679 | // Attribute can only be applied to function types. |
| 5680 | if (!isa<FunctionDecl>(D)) { |
| 5681 | S.Diag(AL.getLoc(), diag::warn_attribute_wrong_decl_type) |
| 5682 | << AL << ExpectedFunction; |
| 5683 | return; |
| 5684 | } |
| 5685 | |
| 5686 | D->addAttr(::new (S.Context) |
| 5687 | X86ForceAlignArgPointerAttr(AL.getRange(), S.Context, |
| 5688 | AL.getAttributeSpellingListIndex())); |
| 5689 | } |
| 5690 | |
| 5691 | static void handleLayoutVersion(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5692 | uint32_t Version; |
| 5693 | Expr *VersionExpr = static_cast<Expr *>(AL.getArgAsExpr(0)); |
| 5694 | if (!checkUInt32Argument(S, AL, AL.getArgAsExpr(0), Version)) |
| 5695 | return; |
| 5696 | |
| 5697 | // TODO: Investigate what happens with the next major version of MSVC. |
| 5698 | if (Version != LangOptions::MSVC2015 / 100) { |
| 5699 | S.Diag(AL.getLoc(), diag::err_attribute_argument_out_of_bounds) |
| 5700 | << AL << Version << VersionExpr->getSourceRange(); |
| 5701 | return; |
| 5702 | } |
| 5703 | |
| 5704 | // The attribute expects a "major" version number like 19, but new versions of |
| 5705 | // MSVC have moved to updating the "minor", or less significant numbers, so we |
| 5706 | // have to multiply by 100 now. |
| 5707 | Version *= 100; |
| 5708 | |
| 5709 | D->addAttr(::new (S.Context) |
| 5710 | LayoutVersionAttr(AL.getRange(), S.Context, Version, |
| 5711 | AL.getAttributeSpellingListIndex())); |
| 5712 | } |
| 5713 | |
| 5714 | DLLImportAttr *Sema::mergeDLLImportAttr(Decl *D, SourceRange Range, |
| 5715 | unsigned AttrSpellingListIndex) { |
| 5716 | if (D->hasAttr<DLLExportAttr>()) { |
| 5717 | Diag(Range.getBegin(), diag::warn_attribute_ignored) << "'dllimport'"; |
| 5718 | return nullptr; |
| 5719 | } |
| 5720 | |
| 5721 | if (D->hasAttr<DLLImportAttr>()) |
| 5722 | return nullptr; |
| 5723 | |
| 5724 | return ::new (Context) DLLImportAttr(Range, Context, AttrSpellingListIndex); |
| 5725 | } |
| 5726 | |
| 5727 | DLLExportAttr *Sema::mergeDLLExportAttr(Decl *D, SourceRange Range, |
| 5728 | unsigned AttrSpellingListIndex) { |
| 5729 | if (DLLImportAttr *Import = D->getAttr<DLLImportAttr>()) { |
| 5730 | Diag(Import->getLocation(), diag::warn_attribute_ignored) << Import; |
| 5731 | D->dropAttr<DLLImportAttr>(); |
| 5732 | } |
| 5733 | |
| 5734 | if (D->hasAttr<DLLExportAttr>()) |
| 5735 | return nullptr; |
| 5736 | |
| 5737 | return ::new (Context) DLLExportAttr(Range, Context, AttrSpellingListIndex); |
| 5738 | } |
| 5739 | |
| 5740 | static void handleDLLAttr(Sema &S, Decl *D, const ParsedAttr &A) { |
| 5741 | if (isa<ClassTemplatePartialSpecializationDecl>(D) && |
| 5742 | S.Context.getTargetInfo().getCXXABI().isMicrosoft()) { |
| 5743 | S.Diag(A.getRange().getBegin(), diag::warn_attribute_ignored) << A; |
| 5744 | return; |
| 5745 | } |
| 5746 | |
| 5747 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) { |
| 5748 | if (FD->isInlined() && A.getKind() == ParsedAttr::AT_DLLImport && |
| 5749 | !S.Context.getTargetInfo().getCXXABI().isMicrosoft()) { |
| 5750 | // MinGW doesn't allow dllimport on inline functions. |
| 5751 | S.Diag(A.getRange().getBegin(), diag::warn_attribute_ignored_on_inline) |
| 5752 | << A; |
| 5753 | return; |
| 5754 | } |
| 5755 | } |
| 5756 | |
| 5757 | if (const auto *MD = dyn_cast<CXXMethodDecl>(D)) { |
| 5758 | if (S.Context.getTargetInfo().getCXXABI().isMicrosoft() && |
| 5759 | MD->getParent()->isLambda()) { |
| 5760 | S.Diag(A.getRange().getBegin(), diag::err_attribute_dll_lambda) << A; |
| 5761 | return; |
| 5762 | } |
| 5763 | } |
| 5764 | |
| 5765 | unsigned Index = A.getAttributeSpellingListIndex(); |
| 5766 | Attr *NewAttr = A.getKind() == ParsedAttr::AT_DLLExport |
| 5767 | ? (Attr *)S.mergeDLLExportAttr(D, A.getRange(), Index) |
| 5768 | : (Attr *)S.mergeDLLImportAttr(D, A.getRange(), Index); |
| 5769 | if (NewAttr) |
| 5770 | D->addAttr(NewAttr); |
| 5771 | } |
| 5772 | |
| 5773 | MSInheritanceAttr * |
| 5774 | Sema::mergeMSInheritanceAttr(Decl *D, SourceRange Range, bool BestCase, |
| 5775 | unsigned AttrSpellingListIndex, |
| 5776 | MSInheritanceAttr::Spelling SemanticSpelling) { |
| 5777 | if (MSInheritanceAttr *IA = D->getAttr<MSInheritanceAttr>()) { |
| 5778 | if (IA->getSemanticSpelling() == SemanticSpelling) |
| 5779 | return nullptr; |
| 5780 | Diag(IA->getLocation(), diag::err_mismatched_ms_inheritance) |
| 5781 | << 1 /*previous declaration*/; |
| 5782 | Diag(Range.getBegin(), diag::note_previous_ms_inheritance); |
| 5783 | D->dropAttr<MSInheritanceAttr>(); |
| 5784 | } |
| 5785 | |
| 5786 | auto *RD = cast<CXXRecordDecl>(D); |
| 5787 | if (RD->hasDefinition()) { |
| 5788 | if (checkMSInheritanceAttrOnDefinition(RD, Range, BestCase, |
| 5789 | SemanticSpelling)) { |
| 5790 | return nullptr; |
| 5791 | } |
| 5792 | } else { |
| 5793 | if (isa<ClassTemplatePartialSpecializationDecl>(RD)) { |
| 5794 | Diag(Range.getBegin(), diag::warn_ignored_ms_inheritance) |
| 5795 | << 1 /*partial specialization*/; |
| 5796 | return nullptr; |
| 5797 | } |
| 5798 | if (RD->getDescribedClassTemplate()) { |
| 5799 | Diag(Range.getBegin(), diag::warn_ignored_ms_inheritance) |
| 5800 | << 0 /*primary template*/; |
| 5801 | return nullptr; |
| 5802 | } |
| 5803 | } |
| 5804 | |
| 5805 | return ::new (Context) |
| 5806 | MSInheritanceAttr(Range, Context, BestCase, AttrSpellingListIndex); |
| 5807 | } |
| 5808 | |
| 5809 | static void handleCapabilityAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5810 | // The capability attributes take a single string parameter for the name of |
| 5811 | // the capability they represent. The lockable attribute does not take any |
| 5812 | // parameters. However, semantically, both attributes represent the same |
| 5813 | // concept, and so they use the same semantic attribute. Eventually, the |
| 5814 | // lockable attribute will be removed. |
| 5815 | // |
| 5816 | // For backward compatibility, any capability which has no specified string |
| 5817 | // literal will be considered a "mutex." |
| 5818 | StringRef N("mutex"); |
| 5819 | SourceLocation LiteralLoc; |
| 5820 | if (AL.getKind() == ParsedAttr::AT_Capability && |
| 5821 | !S.checkStringLiteralArgumentAttr(AL, 0, N, &LiteralLoc)) |
| 5822 | return; |
| 5823 | |
| 5824 | // Currently, there are only two names allowed for a capability: role and |
| 5825 | // mutex (case insensitive). Diagnose other capability names. |
| 5826 | if (!N.equals_lower("mutex") && !N.equals_lower("role")) |
| 5827 | S.Diag(LiteralLoc, diag::warn_invalid_capability_name) << N; |
| 5828 | |
| 5829 | D->addAttr(::new (S.Context) CapabilityAttr(AL.getRange(), S.Context, N, |
| 5830 | AL.getAttributeSpellingListIndex())); |
| 5831 | } |
| 5832 | |
| 5833 | static void handleAssertCapabilityAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5834 | SmallVector<Expr*, 1> Args; |
| 5835 | if (!checkLockFunAttrCommon(S, D, AL, Args)) |
| 5836 | return; |
| 5837 | |
| 5838 | D->addAttr(::new (S.Context) AssertCapabilityAttr(AL.getRange(), S.Context, |
| 5839 | Args.data(), Args.size(), |
| 5840 | AL.getAttributeSpellingListIndex())); |
| 5841 | } |
| 5842 | |
| 5843 | static void handleAcquireCapabilityAttr(Sema &S, Decl *D, |
| 5844 | const ParsedAttr &AL) { |
| 5845 | SmallVector<Expr*, 1> Args; |
| 5846 | if (!checkLockFunAttrCommon(S, D, AL, Args)) |
| 5847 | return; |
| 5848 | |
| 5849 | D->addAttr(::new (S.Context) AcquireCapabilityAttr(AL.getRange(), |
| 5850 | S.Context, |
| 5851 | Args.data(), Args.size(), |
| 5852 | AL.getAttributeSpellingListIndex())); |
| 5853 | } |
| 5854 | |
| 5855 | static void handleTryAcquireCapabilityAttr(Sema &S, Decl *D, |
| 5856 | const ParsedAttr &AL) { |
| 5857 | SmallVector<Expr*, 2> Args; |
| 5858 | if (!checkTryLockFunAttrCommon(S, D, AL, Args)) |
| 5859 | return; |
| 5860 | |
| 5861 | D->addAttr(::new (S.Context) TryAcquireCapabilityAttr(AL.getRange(), |
| 5862 | S.Context, |
| 5863 | AL.getArgAsExpr(0), |
| 5864 | Args.data(), |
| 5865 | Args.size(), |
| 5866 | AL.getAttributeSpellingListIndex())); |
| 5867 | } |
| 5868 | |
| 5869 | static void handleReleaseCapabilityAttr(Sema &S, Decl *D, |
| 5870 | const ParsedAttr &AL) { |
| 5871 | // Check that all arguments are lockable objects. |
| 5872 | SmallVector<Expr *, 1> Args; |
| 5873 | checkAttrArgsAreCapabilityObjs(S, D, AL, Args, 0, true); |
| 5874 | |
| 5875 | D->addAttr(::new (S.Context) ReleaseCapabilityAttr( |
| 5876 | AL.getRange(), S.Context, Args.data(), Args.size(), |
| 5877 | AL.getAttributeSpellingListIndex())); |
| 5878 | } |
| 5879 | |
| 5880 | static void handleRequiresCapabilityAttr(Sema &S, Decl *D, |
| 5881 | const ParsedAttr &AL) { |
| 5882 | if (!checkAttributeAtLeastNumArgs(S, AL, 1)) |
| 5883 | return; |
| 5884 | |
| 5885 | // check that all arguments are lockable objects |
| 5886 | SmallVector<Expr*, 1> Args; |
| 5887 | checkAttrArgsAreCapabilityObjs(S, D, AL, Args); |
| 5888 | if (Args.empty()) |
| 5889 | return; |
| 5890 | |
| 5891 | RequiresCapabilityAttr *RCA = ::new (S.Context) |
| 5892 | RequiresCapabilityAttr(AL.getRange(), S.Context, Args.data(), |
| 5893 | Args.size(), AL.getAttributeSpellingListIndex()); |
| 5894 | |
| 5895 | D->addAttr(RCA); |
| 5896 | } |
| 5897 | |
| 5898 | static void handleDeprecatedAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5899 | if (const auto *NSD = dyn_cast<NamespaceDecl>(D)) { |
| 5900 | if (NSD->isAnonymousNamespace()) { |
| 5901 | S.Diag(AL.getLoc(), diag::warn_deprecated_anonymous_namespace); |
| 5902 | // Do not want to attach the attribute to the namespace because that will |
| 5903 | // cause confusing diagnostic reports for uses of declarations within the |
| 5904 | // namespace. |
| 5905 | return; |
| 5906 | } |
| 5907 | } |
| 5908 | |
| 5909 | // Handle the cases where the attribute has a text message. |
| 5910 | StringRef Str, Replacement; |
| 5911 | if (AL.isArgExpr(0) && AL.getArgAsExpr(0) && |
| 5912 | !S.checkStringLiteralArgumentAttr(AL, 0, Str)) |
| 5913 | return; |
| 5914 | |
| 5915 | // Only support a single optional message for Declspec and CXX11. |
| 5916 | if (AL.isDeclspecAttribute() || AL.isCXX11Attribute()) |
| 5917 | checkAttributeAtMostNumArgs(S, AL, 1); |
| 5918 | else if (AL.isArgExpr(1) && AL.getArgAsExpr(1) && |
| 5919 | !S.checkStringLiteralArgumentAttr(AL, 1, Replacement)) |
| 5920 | return; |
| 5921 | |
| 5922 | if (!S.getLangOpts().CPlusPlus14 && AL.isCXX11Attribute() && !AL.isGNUScope()) |
| 5923 | S.Diag(AL.getLoc(), diag::ext_cxx14_attr) << AL; |
| 5924 | |
| 5925 | D->addAttr(::new (S.Context) |
| 5926 | DeprecatedAttr(AL.getRange(), S.Context, Str, Replacement, |
| 5927 | AL.getAttributeSpellingListIndex())); |
| 5928 | } |
| 5929 | |
| 5930 | static bool isGlobalVar(const Decl *D) { |
| 5931 | if (const auto *S = dyn_cast<VarDecl>(D)) |
| 5932 | return S->hasGlobalStorage(); |
| 5933 | return false; |
| 5934 | } |
| 5935 | |
| 5936 | static void handleNoSanitizeAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5937 | if (!checkAttributeAtLeastNumArgs(S, AL, 1)) |
| 5938 | return; |
| 5939 | |
| 5940 | std::vector<StringRef> Sanitizers; |
| 5941 | |
| 5942 | for (unsigned I = 0, E = AL.getNumArgs(); I != E; ++I) { |
| 5943 | StringRef SanitizerName; |
| 5944 | SourceLocation LiteralLoc; |
| 5945 | |
| 5946 | if (!S.checkStringLiteralArgumentAttr(AL, I, SanitizerName, &LiteralLoc)) |
| 5947 | return; |
| 5948 | |
| 5949 | if (parseSanitizerValue(SanitizerName, /*AllowGroups=*/true) == 0) |
| 5950 | S.Diag(LiteralLoc, diag::warn_unknown_sanitizer_ignored) << SanitizerName; |
| 5951 | else if (isGlobalVar(D) && SanitizerName != "address") |
| 5952 | S.Diag(D->getLocation(), diag::err_attribute_wrong_decl_type) |
| 5953 | << AL << ExpectedFunctionOrMethod; |
| 5954 | Sanitizers.push_back(SanitizerName); |
| 5955 | } |
| 5956 | |
| 5957 | D->addAttr(::new (S.Context) NoSanitizeAttr( |
| 5958 | AL.getRange(), S.Context, Sanitizers.data(), Sanitizers.size(), |
| 5959 | AL.getAttributeSpellingListIndex())); |
| 5960 | } |
| 5961 | |
| 5962 | static void handleNoSanitizeSpecificAttr(Sema &S, Decl *D, |
| 5963 | const ParsedAttr &AL) { |
| 5964 | StringRef AttrName = AL.getName()->getName(); |
| 5965 | normalizeName(AttrName); |
| 5966 | StringRef SanitizerName = llvm::StringSwitch<StringRef>(AttrName) |
| 5967 | .Case("no_address_safety_analysis", "address") |
| 5968 | .Case("no_sanitize_address", "address") |
| 5969 | .Case("no_sanitize_thread", "thread") |
| 5970 | .Case("no_sanitize_memory", "memory"); |
| 5971 | if (isGlobalVar(D) && SanitizerName != "address") |
| 5972 | S.Diag(D->getLocation(), diag::err_attribute_wrong_decl_type) |
| 5973 | << AL << ExpectedFunction; |
| 5974 | D->addAttr(::new (S.Context) |
| 5975 | NoSanitizeAttr(AL.getRange(), S.Context, &SanitizerName, 1, |
| 5976 | AL.getAttributeSpellingListIndex())); |
| 5977 | } |
| 5978 | |
| 5979 | static void handleInternalLinkageAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5980 | if (InternalLinkageAttr *Internal = S.mergeInternalLinkageAttr(D, AL)) |
| 5981 | D->addAttr(Internal); |
| 5982 | } |
| 5983 | |
| 5984 | static void handleOpenCLNoSVMAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 5985 | if (S.LangOpts.OpenCLVersion != 200) |
| 5986 | S.Diag(AL.getLoc(), diag::err_attribute_requires_opencl_version) |
| 5987 | << AL << "2.0" << 0; |
| 5988 | else |
| 5989 | S.Diag(AL.getLoc(), diag::warn_opencl_attr_deprecated_ignored) << AL |
| 5990 | << "2.0"; |
| 5991 | } |
| 5992 | |
| 5993 | /// Handles semantic checking for features that are common to all attributes, |
| 5994 | /// such as checking whether a parameter was properly specified, or the correct |
| 5995 | /// number of arguments were passed, etc. |
| 5996 | static bool handleCommonAttributeFeatures(Sema &S, Decl *D, |
| 5997 | const ParsedAttr &AL) { |
| 5998 | // Several attributes carry different semantics than the parsing requires, so |
| 5999 | // those are opted out of the common argument checks. |
| 6000 | // |
| 6001 | // We also bail on unknown and ignored attributes because those are handled |
| 6002 | // as part of the target-specific handling logic. |
| 6003 | if (AL.getKind() == ParsedAttr::UnknownAttribute) |
| 6004 | return false; |
| 6005 | // Check whether the attribute requires specific language extensions to be |
| 6006 | // enabled. |
| 6007 | if (!AL.diagnoseLangOpts(S)) |
| 6008 | return true; |
| 6009 | // Check whether the attribute appertains to the given subject. |
| 6010 | if (!AL.diagnoseAppertainsTo(S, D)) |
| 6011 | return true; |
| 6012 | if (AL.hasCustomParsing()) |
| 6013 | return false; |
| 6014 | |
| 6015 | if (AL.getMinArgs() == AL.getMaxArgs()) { |
| 6016 | // If there are no optional arguments, then checking for the argument count |
| 6017 | // is trivial. |
| 6018 | if (!checkAttributeNumArgs(S, AL, AL.getMinArgs())) |
| 6019 | return true; |
| 6020 | } else { |
| 6021 | // There are optional arguments, so checking is slightly more involved. |
| 6022 | if (AL.getMinArgs() && |
| 6023 | !checkAttributeAtLeastNumArgs(S, AL, AL.getMinArgs())) |
| 6024 | return true; |
| 6025 | else if (!AL.hasVariadicArg() && AL.getMaxArgs() && |
| 6026 | !checkAttributeAtMostNumArgs(S, AL, AL.getMaxArgs())) |
| 6027 | return true; |
| 6028 | } |
| 6029 | |
| 6030 | if (S.CheckAttrTarget(AL)) |
| 6031 | return true; |
| 6032 | |
| 6033 | return false; |
| 6034 | } |
| 6035 | |
| 6036 | static void handleOpenCLAccessAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 6037 | if (D->isInvalidDecl()) |
| 6038 | return; |
| 6039 | |
| 6040 | // Check if there is only one access qualifier. |
| 6041 | if (D->hasAttr<OpenCLAccessAttr>()) { |
| 6042 | if (D->getAttr<OpenCLAccessAttr>()->getSemanticSpelling() == |
| 6043 | AL.getSemanticSpelling()) { |
| 6044 | S.Diag(AL.getLoc(), diag::warn_duplicate_declspec) |
| 6045 | << AL.getName()->getName() << AL.getRange(); |
| 6046 | } else { |
| 6047 | S.Diag(AL.getLoc(), diag::err_opencl_multiple_access_qualifiers) |
| 6048 | << D->getSourceRange(); |
| 6049 | D->setInvalidDecl(true); |
| 6050 | return; |
| 6051 | } |
| 6052 | } |
| 6053 | |
| 6054 | // OpenCL v2.0 s6.6 - read_write can be used for image types to specify that an |
| 6055 | // image object can be read and written. |
| 6056 | // OpenCL v2.0 s6.13.6 - A kernel cannot read from and write to the same pipe |
| 6057 | // object. Using the read_write (or __read_write) qualifier with the pipe |
| 6058 | // qualifier is a compilation error. |
| 6059 | if (const auto *PDecl = dyn_cast<ParmVarDecl>(D)) { |
| 6060 | const Type *DeclTy = PDecl->getType().getCanonicalType().getTypePtr(); |
| 6061 | if (AL.getName()->getName().find("read_write") != StringRef::npos) { |
| 6062 | if (S.getLangOpts().OpenCLVersion < 200 || DeclTy->isPipeType()) { |
| 6063 | S.Diag(AL.getLoc(), diag::err_opencl_invalid_read_write) |
| 6064 | << AL << PDecl->getType() << DeclTy->isImageType(); |
| 6065 | D->setInvalidDecl(true); |
| 6066 | return; |
| 6067 | } |
| 6068 | } |
| 6069 | } |
| 6070 | |
| 6071 | D->addAttr(::new (S.Context) OpenCLAccessAttr( |
| 6072 | AL.getRange(), S.Context, AL.getAttributeSpellingListIndex())); |
| 6073 | } |
| 6074 | |
| 6075 | static void handleDestroyAttr(Sema &S, Decl *D, const ParsedAttr &A) { |
| 6076 | if (!cast<VarDecl>(D)->hasGlobalStorage()) { |
| 6077 | S.Diag(D->getLocation(), diag::err_destroy_attr_on_non_static_var) |
| 6078 | << (A.getKind() == ParsedAttr::AT_AlwaysDestroy); |
| 6079 | return; |
| 6080 | } |
| 6081 | |
| 6082 | if (A.getKind() == ParsedAttr::AT_AlwaysDestroy) |
| 6083 | handleSimpleAttributeWithExclusions<AlwaysDestroyAttr, NoDestroyAttr>(S, D, A); |
| 6084 | else |
| 6085 | handleSimpleAttributeWithExclusions<NoDestroyAttr, AlwaysDestroyAttr>(S, D, A); |
| 6086 | } |
| 6087 | |
| 6088 | static void handleUninitializedAttr(Sema &S, Decl *D, const ParsedAttr &AL) { |
| 6089 | assert(cast<VarDecl>(D)->getStorageDuration() == SD_Automatic &&((cast<VarDecl>(D)->getStorageDuration() == SD_Automatic && "uninitialized is only valid on automatic duration variables" ) ? static_cast<void> (0) : __assert_fail ("cast<VarDecl>(D)->getStorageDuration() == SD_Automatic && \"uninitialized is only valid on automatic duration variables\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 6090, __PRETTY_FUNCTION__)) |
| 6090 | "uninitialized is only valid on automatic duration variables")((cast<VarDecl>(D)->getStorageDuration() == SD_Automatic && "uninitialized is only valid on automatic duration variables" ) ? static_cast<void> (0) : __assert_fail ("cast<VarDecl>(D)->getStorageDuration() == SD_Automatic && \"uninitialized is only valid on automatic duration variables\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 6090, __PRETTY_FUNCTION__)); |
| 6091 | unsigned Index = AL.getAttributeSpellingListIndex(); |
| 6092 | D->addAttr(::new (S.Context) |
| 6093 | UninitializedAttr(AL.getLoc(), S.Context, Index)); |
| 6094 | } |
| 6095 | |
| 6096 | //===----------------------------------------------------------------------===// |
| 6097 | // Top Level Sema Entry Points |
| 6098 | //===----------------------------------------------------------------------===// |
| 6099 | |
| 6100 | /// ProcessDeclAttribute - Apply the specific attribute to the specified decl if |
| 6101 | /// the attribute applies to decls. If the attribute is a type attribute, just |
| 6102 | /// silently ignore it if a GNU attribute. |
| 6103 | static void ProcessDeclAttribute(Sema &S, Scope *scope, Decl *D, |
| 6104 | const ParsedAttr &AL, |
| 6105 | bool IncludeCXX11Attributes) { |
| 6106 | if (AL.isInvalid() || AL.getKind() == ParsedAttr::IgnoredAttribute) |
| 6107 | return; |
| 6108 | |
| 6109 | // Ignore C++11 attributes on declarator chunks: they appertain to the type |
| 6110 | // instead. |
| 6111 | if (AL.isCXX11Attribute() && !IncludeCXX11Attributes) |
| 6112 | return; |
| 6113 | |
| 6114 | // Unknown attributes are automatically warned on. Target-specific attributes |
| 6115 | // which do not apply to the current target architecture are treated as |
| 6116 | // though they were unknown attributes. |
| 6117 | if (AL.getKind() == ParsedAttr::UnknownAttribute || |
| 6118 | !AL.existsInTarget(S.Context.getTargetInfo())) { |
| 6119 | S.Diag(AL.getLoc(), |
| 6120 | AL.isDeclspecAttribute() |
| 6121 | ? (unsigned)diag::warn_unhandled_ms_attribute_ignored |
| 6122 | : (unsigned)diag::warn_unknown_attribute_ignored) |
| 6123 | << AL; |
| 6124 | return; |
| 6125 | } |
| 6126 | |
| 6127 | if (handleCommonAttributeFeatures(S, D, AL)) |
| 6128 | return; |
| 6129 | |
| 6130 | switch (AL.getKind()) { |
| 6131 | default: |
| 6132 | if (!AL.isStmtAttr()) { |
| 6133 | // Type attributes are handled elsewhere; silently move on. |
| 6134 | assert(AL.isTypeAttr() && "Non-type attribute not handled")((AL.isTypeAttr() && "Non-type attribute not handled" ) ? static_cast<void> (0) : __assert_fail ("AL.isTypeAttr() && \"Non-type attribute not handled\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/Sema/SemaDeclAttr.cpp" , 6134, __PRETTY_FUNCTION__)); |
| 6135 | break; |
| 6136 | } |
| 6137 | S.Diag(AL.getLoc(), diag::err_stmt_attribute_invalid_on_decl) |
| 6138 | << AL << D->getLocation(); |
| 6139 | break; |
| 6140 | case ParsedAttr::AT_Interrupt: |
| 6141 | handleInterruptAttr(S, D, AL); |
| 6142 | break; |
| 6143 | case ParsedAttr::AT_X86ForceAlignArgPointer: |
| 6144 | handleX86ForceAlignArgPointerAttr(S, D, AL); |
| 6145 | break; |
| 6146 | case ParsedAttr::AT_DLLExport: |
| 6147 | case ParsedAttr::AT_DLLImport: |
| 6148 | handleDLLAttr(S, D, AL); |
| 6149 | break; |
| 6150 | case ParsedAttr::AT_Mips16: |
| 6151 | handleSimpleAttributeWithExclusions<Mips16Attr, MicroMipsAttr, |
| 6152 | MipsInterruptAttr>(S, D, AL); |
| 6153 | break; |
| 6154 | case ParsedAttr::AT_NoMips16: |
| 6155 | handleSimpleAttribute<NoMips16Attr>(S, D, AL); |
| 6156 | break; |
| 6157 | case ParsedAttr::AT_MicroMips: |
| 6158 | handleSimpleAttributeWithExclusions<MicroMipsAttr, Mips16Attr>(S, D, AL); |
| 6159 | break; |
| 6160 | case ParsedAttr::AT_NoMicroMips: |
| 6161 | handleSimpleAttribute<NoMicroMipsAttr>(S, D, AL); |
| 6162 | break; |
| 6163 | case ParsedAttr::AT_MipsLongCall: |
| 6164 | handleSimpleAttributeWithExclusions<MipsLongCallAttr, MipsShortCallAttr>( |
| 6165 | S, D, AL); |
| 6166 | break; |
| 6167 | case ParsedAttr::AT_MipsShortCall: |
| 6168 | handleSimpleAttributeWithExclusions<MipsShortCallAttr, MipsLongCallAttr>( |
| 6169 | S, D, AL); |
| 6170 | break; |
| 6171 | case ParsedAttr::AT_AMDGPUFlatWorkGroupSize: |
| 6172 | handleAMDGPUFlatWorkGroupSizeAttr(S, D, AL); |
| 6173 | break; |
| 6174 | case ParsedAttr::AT_AMDGPUWavesPerEU: |
| 6175 | handleAMDGPUWavesPerEUAttr(S, D, AL); |
| 6176 | break; |
| 6177 | case ParsedAttr::AT_AMDGPUNumSGPR: |
| 6178 | handleAMDGPUNumSGPRAttr(S, D, AL); |
| 6179 | break; |
| 6180 | case ParsedAttr::AT_AMDGPUNumVGPR: |
| 6181 | handleAMDGPUNumVGPRAttr(S, D, AL); |
| 6182 | break; |
| 6183 | case ParsedAttr::AT_AVRSignal: |
| 6184 | handleAVRSignalAttr(S, D, AL); |
| 6185 | break; |
| 6186 | case ParsedAttr::AT_IBAction: |
| 6187 | handleSimpleAttribute<IBActionAttr>(S, D, AL); |
| 6188 | break; |
| 6189 | case ParsedAttr::AT_IBOutlet: |
| 6190 | handleIBOutlet(S, D, AL); |
| 6191 | break; |
| 6192 | case ParsedAttr::AT_IBOutletCollection: |
| 6193 | handleIBOutletCollection(S, D, AL); |
| 6194 | break; |
| 6195 | case ParsedAttr::AT_IFunc: |
| 6196 | handleIFuncAttr(S, D, AL); |
| 6197 | break; |
| 6198 | case ParsedAttr::AT_Alias: |
| 6199 | handleAliasAttr(S, D, AL); |
| 6200 | break; |
| 6201 | case ParsedAttr::AT_Aligned: |
| 6202 | handleAlignedAttr(S, D, AL); |
| 6203 | break; |
| 6204 | case ParsedAttr::AT_AlignValue: |
| 6205 | handleAlignValueAttr(S, D, AL); |
| 6206 | break; |
| 6207 | case ParsedAttr::AT_AllocSize: |
| 6208 | handleAllocSizeAttr(S, D, AL); |
| 6209 | break; |
| 6210 | case ParsedAttr::AT_AlwaysInline: |
| 6211 | handleAlwaysInlineAttr(S, D, AL); |
| 6212 | break; |
| 6213 | case ParsedAttr::AT_Artificial: |
| 6214 | handleSimpleAttribute<ArtificialAttr>(S, D, AL); |
| 6215 | break; |
| 6216 | case ParsedAttr::AT_AnalyzerNoReturn: |
| 6217 | handleAnalyzerNoReturnAttr(S, D, AL); |
| 6218 | break; |
| 6219 | case ParsedAttr::AT_TLSModel: |
| 6220 | handleTLSModelAttr(S, D, AL); |
| 6221 | break; |
| 6222 | case ParsedAttr::AT_Annotate: |
| 6223 | handleAnnotateAttr(S, D, AL); |
| 6224 | break; |
| 6225 | case ParsedAttr::AT_Availability: |
| 6226 | handleAvailabilityAttr(S, D, AL); |
| 6227 | break; |
| 6228 | case ParsedAttr::AT_CarriesDependency: |
| 6229 | handleDependencyAttr(S, scope, D, AL); |
| 6230 | break; |
| 6231 | case ParsedAttr::AT_CPUDispatch: |
| 6232 | case ParsedAttr::AT_CPUSpecific: |
| 6233 | handleCPUSpecificAttr(S, D, AL); |
| 6234 | break; |
| 6235 | case ParsedAttr::AT_Common: |
| 6236 | handleCommonAttr(S, D, AL); |
| 6237 | break; |
| 6238 | case ParsedAttr::AT_CUDAConstant: |
| 6239 | handleConstantAttr(S, D, AL); |
| 6240 | break; |
| 6241 | case ParsedAttr::AT_PassObjectSize: |
| 6242 | handlePassObjectSizeAttr(S, D, AL); |
| 6243 | break; |
| 6244 | case ParsedAttr::AT_Constructor: |