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| 9 | #include "IndexingContext.h" |
| 10 | #include "clang/Basic/SourceLocation.h" |
| 11 | #include "clang/Index/IndexDataConsumer.h" |
| 12 | #include "clang/AST/ASTContext.h" |
| 13 | #include "clang/AST/DeclTemplate.h" |
| 14 | #include "clang/AST/DeclObjC.h" |
| 15 | #include "clang/Basic/SourceManager.h" |
| 16 | |
| 17 | using namespace clang; |
| 18 | using namespace index; |
| 19 | |
| 20 | static bool isGeneratedDecl(const Decl *D) { |
| 21 | if (auto *attr = D->getAttr<ExternalSourceSymbolAttr>()) { |
| 22 | return attr->getGeneratedDeclaration(); |
| 23 | } |
| 24 | return false; |
| 25 | } |
| 26 | |
| 27 | bool IndexingContext::shouldIndex(const Decl *D) { |
| 28 | return !isGeneratedDecl(D); |
| 29 | } |
| 30 | |
| 31 | const LangOptions &IndexingContext::getLangOpts() const { |
| 32 | return Ctx->getLangOpts(); |
| 33 | } |
| 34 | |
| 35 | bool IndexingContext::shouldIndexFunctionLocalSymbols() const { |
| 36 | return IndexOpts.IndexFunctionLocals; |
| 37 | } |
| 38 | |
| 39 | bool IndexingContext::shouldIndexImplicitInstantiation() const { |
| 40 | return IndexOpts.IndexImplicitInstantiation; |
| 41 | } |
| 42 | |
| 43 | bool IndexingContext::shouldIndexParametersInDeclarations() const { |
| 44 | return IndexOpts.IndexParametersInDeclarations; |
| 45 | } |
| 46 | |
| 47 | bool IndexingContext::shouldIndexTemplateParameters() const { |
| 48 | return IndexOpts.IndexTemplateParameters; |
| 49 | } |
| 50 | |
| 51 | bool IndexingContext::handleDecl(const Decl *D, |
| 52 | SymbolRoleSet Roles, |
| 53 | ArrayRef<SymbolRelation> Relations) { |
| 54 | return handleDecl(D, D->getLocation(), Roles, Relations); |
| 55 | } |
| 56 | |
| 57 | bool IndexingContext::handleDecl(const Decl *D, SourceLocation Loc, |
| 58 | SymbolRoleSet Roles, |
| 59 | ArrayRef<SymbolRelation> Relations, |
| 60 | const DeclContext *DC) { |
| 61 | if (!DC) |
| 62 | DC = D->getDeclContext(); |
| 63 | |
| 64 | const Decl *OrigD = D; |
| 65 | if (isa<ObjCPropertyImplDecl>(D)) { |
| 66 | D = cast<ObjCPropertyImplDecl>(D)->getPropertyDecl(); |
| 67 | } |
| 68 | return handleDeclOccurrence(D, Loc, , cast<Decl>(DC), |
| 69 | Roles, Relations, |
| 70 | nullptr, OrigD, DC); |
| 71 | } |
| 72 | |
| 73 | bool IndexingContext::handleReference(const NamedDecl *D, SourceLocation Loc, |
| 74 | const NamedDecl *Parent, |
| 75 | const DeclContext *DC, |
| 76 | SymbolRoleSet Roles, |
| 77 | ArrayRef<SymbolRelation> Relations, |
| 78 | const Expr *RefE, |
| 79 | const Decl *RefD) { |
| 80 | if (!shouldIndexFunctionLocalSymbols() && isFunctionLocalSymbol(D)) |
| 81 | return true; |
| 82 | |
| 83 | if (!shouldIndexTemplateParameters() && |
| 84 | (isa<NonTypeTemplateParmDecl>(D) || isa<TemplateTypeParmDecl>(D) || |
| 85 | isa<TemplateTemplateParmDecl>(D))) { |
| 86 | return true; |
| 87 | } |
| 88 | |
| 89 | return handleDeclOccurrence(D, Loc, , Parent, Roles, Relations, |
| 90 | RefE, RefD, DC); |
| 91 | } |
| 92 | |
| 93 | static void reportModuleReferences(const Module *Mod, |
| 94 | ArrayRef<SourceLocation> IdLocs, |
| 95 | const ImportDecl *ImportD, |
| 96 | IndexDataConsumer &DataConsumer) { |
| 97 | if (!Mod) |
| 98 | return; |
| 99 | reportModuleReferences(Mod->Parent, IdLocs.drop_back(), ImportD, |
| 100 | DataConsumer); |
| 101 | DataConsumer.handleModuleOccurence(ImportD, Mod, |
| 102 | (SymbolRoleSet)SymbolRole::Reference, |
| 103 | IdLocs.back()); |
| 104 | } |
| 105 | |
| 106 | bool IndexingContext::importedModule(const ImportDecl *ImportD) { |
| 107 | if (ImportD->isInvalidDecl()) |
| 108 | return true; |
| 109 | |
| 110 | SourceLocation Loc; |
| 111 | auto IdLocs = ImportD->getIdentifierLocs(); |
| 112 | if (!IdLocs.empty()) |
| 113 | Loc = IdLocs.back(); |
| 114 | else |
| 115 | Loc = ImportD->getLocation(); |
| 116 | |
| 117 | SourceManager &SM = Ctx->getSourceManager(); |
| 118 | FileID FID = SM.getFileID(SM.getFileLoc(Loc)); |
| 119 | if (FID.isInvalid()) |
| 120 | return true; |
| 121 | |
| 122 | bool Invalid = false; |
| 123 | const SrcMgr::SLocEntry &SEntry = SM.getSLocEntry(FID, &Invalid); |
| 124 | if (Invalid || !SEntry.isFile()) |
| 125 | return true; |
| 126 | |
| 127 | if (SEntry.getFile().getFileCharacteristic() != SrcMgr::C_User) { |
| 128 | switch (IndexOpts.SystemSymbolFilter) { |
| 129 | case IndexingOptions::SystemSymbolFilterKind::None: |
| 130 | return true; |
| 131 | case IndexingOptions::SystemSymbolFilterKind::DeclarationsOnly: |
| 132 | case IndexingOptions::SystemSymbolFilterKind::All: |
| 133 | break; |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | const Module *Mod = ImportD->getImportedModule(); |
| 138 | if (!ImportD->isImplicit() && Mod->Parent && !IdLocs.empty()) { |
| 139 | reportModuleReferences(Mod->Parent, IdLocs.drop_back(), ImportD, |
| 140 | DataConsumer); |
| 141 | } |
| 142 | |
| 143 | SymbolRoleSet Roles = (unsigned)SymbolRole::Declaration; |
| 144 | if (ImportD->isImplicit()) |
| 145 | Roles |= (unsigned)SymbolRole::Implicit; |
| 146 | |
| 147 | return DataConsumer.handleModuleOccurence(ImportD, Mod, Roles, Loc); |
| 148 | } |
| 149 | |
| 150 | bool IndexingContext::isTemplateImplicitInstantiation(const Decl *D) { |
| 151 | TemplateSpecializationKind TKind = TSK_Undeclared; |
| 152 | if (const ClassTemplateSpecializationDecl * |
| 153 | SD = dyn_cast<ClassTemplateSpecializationDecl>(D)) { |
| 154 | TKind = SD->getSpecializationKind(); |
| 155 | } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
| 156 | TKind = FD->getTemplateSpecializationKind(); |
| 157 | } else if (auto *VD = dyn_cast<VarDecl>(D)) { |
| 158 | TKind = VD->getTemplateSpecializationKind(); |
| 159 | } else if (const auto *RD = dyn_cast<CXXRecordDecl>(D)) { |
| 160 | if (RD->getInstantiatedFromMemberClass()) |
| 161 | TKind = RD->getTemplateSpecializationKind(); |
| 162 | } else if (const auto *ED = dyn_cast<EnumDecl>(D)) { |
| 163 | if (ED->getInstantiatedFromMemberEnum()) |
| 164 | TKind = ED->getTemplateSpecializationKind(); |
| 165 | } else if (isa<FieldDecl>(D) || isa<TypedefNameDecl>(D) || |
| 166 | isa<EnumConstantDecl>(D)) { |
| 167 | if (const auto *Parent = dyn_cast<Decl>(D->getDeclContext())) |
| 168 | return isTemplateImplicitInstantiation(Parent); |
| 169 | } |
| 170 | switch (TKind) { |
| 171 | case TSK_Undeclared: |
| 172 | case TSK_ExplicitSpecialization: |
| 173 | return false; |
| 174 | case TSK_ImplicitInstantiation: |
| 175 | case TSK_ExplicitInstantiationDeclaration: |
| 176 | case TSK_ExplicitInstantiationDefinition: |
| 177 | return true; |
| 178 | } |
| 179 | llvm_unreachable("invalid TemplateSpecializationKind"); |
| 180 | } |
| 181 | |
| 182 | bool IndexingContext::shouldIgnoreIfImplicit(const Decl *D) { |
| 183 | if (isa<ObjCInterfaceDecl>(D)) |
| 184 | return false; |
| 185 | if (isa<ObjCCategoryDecl>(D)) |
| 186 | return false; |
| 187 | if (isa<ObjCIvarDecl>(D)) |
| 188 | return false; |
| 189 | if (isa<ObjCMethodDecl>(D)) |
| 190 | return false; |
| 191 | if (isa<ImportDecl>(D)) |
| 192 | return false; |
| 193 | return true; |
| 194 | } |
| 195 | |
| 196 | static const CXXRecordDecl * |
| 197 | getDeclContextForTemplateInstationPattern(const Decl *D) { |
| 198 | if (const auto *CTSD = |
| 199 | dyn_cast<ClassTemplateSpecializationDecl>(D->getDeclContext())) |
| 200 | return CTSD->getTemplateInstantiationPattern(); |
| 201 | else if (const auto *RD = dyn_cast<CXXRecordDecl>(D->getDeclContext())) |
| 202 | return RD->getInstantiatedFromMemberClass(); |
| 203 | return nullptr; |
| 204 | } |
| 205 | |
| 206 | static const Decl *adjustTemplateImplicitInstantiation(const Decl *D) { |
| 207 | if (const ClassTemplateSpecializationDecl * |
| 208 | SD = dyn_cast<ClassTemplateSpecializationDecl>(D)) { |
| 209 | return SD->getTemplateInstantiationPattern(); |
| 210 | } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
| 211 | return FD->getTemplateInstantiationPattern(); |
| 212 | } else if (auto *VD = dyn_cast<VarDecl>(D)) { |
| 213 | return VD->getTemplateInstantiationPattern(); |
| 214 | } else if (const auto *RD = dyn_cast<CXXRecordDecl>(D)) { |
| 215 | return RD->getInstantiatedFromMemberClass(); |
| 216 | } else if (const auto *ED = dyn_cast<EnumDecl>(D)) { |
| 217 | return ED->getInstantiatedFromMemberEnum(); |
| 218 | } else if (isa<FieldDecl>(D) || isa<TypedefNameDecl>(D)) { |
| 219 | const auto *ND = cast<NamedDecl>(D); |
| 220 | if (const CXXRecordDecl *Pattern = |
| 221 | getDeclContextForTemplateInstationPattern(ND)) { |
| 222 | for (const NamedDecl *BaseND : Pattern->lookup(ND->getDeclName())) { |
| 223 | if (BaseND->isImplicit()) |
| 224 | continue; |
| 225 | if (BaseND->getKind() == ND->getKind()) |
| 226 | return BaseND; |
| 227 | } |
| 228 | } |
| 229 | } else if (const auto *ECD = dyn_cast<EnumConstantDecl>(D)) { |
| 230 | if (const auto *ED = dyn_cast<EnumDecl>(ECD->getDeclContext())) { |
| 231 | if (const EnumDecl *Pattern = ED->getInstantiatedFromMemberEnum()) { |
| 232 | for (const NamedDecl *BaseECD : Pattern->lookup(ECD->getDeclName())) |
| 233 | return BaseECD; |
| 234 | } |
| 235 | } |
| 236 | } |
| 237 | return nullptr; |
| 238 | } |
| 239 | |
| 240 | static bool isDeclADefinition(const Decl *D, const DeclContext *ContainerDC, ASTContext &Ctx) { |
| 241 | if (auto VD = dyn_cast<VarDecl>(D)) |
| 242 | return VD->isThisDeclarationADefinition(Ctx); |
| 243 | |
| 244 | if (auto FD = dyn_cast<FunctionDecl>(D)) |
| 245 | return FD->isThisDeclarationADefinition(); |
| 246 | |
| 247 | if (auto TD = dyn_cast<TagDecl>(D)) |
| 248 | return TD->isThisDeclarationADefinition(); |
| 249 | |
| 250 | if (auto MD = dyn_cast<ObjCMethodDecl>(D)) |
| 251 | return MD->isThisDeclarationADefinition() || isa<ObjCImplDecl>(ContainerDC); |
| 252 | |
| 253 | if (isa<TypedefNameDecl>(D) || |
| 254 | isa<EnumConstantDecl>(D) || |
| 255 | isa<FieldDecl>(D) || |
| 256 | isa<MSPropertyDecl>(D) || |
| 257 | isa<ObjCImplDecl>(D) || |
| 258 | isa<ObjCPropertyImplDecl>(D)) |
| 259 | return true; |
| 260 | |
| 261 | return false; |
| 262 | } |
| 263 | |
| 264 | |
| 265 | static bool shouldSkipNamelessDecl(const NamedDecl *ND) { |
| 266 | return (ND->getDeclName().isEmpty() && !isa<TagDecl>(ND) && |
| 267 | !isa<ObjCCategoryDecl>(ND)) || isa<CXXDeductionGuideDecl>(ND); |
| 268 | } |
| 269 | |
| 270 | static const Decl *adjustParent(const Decl *Parent) { |
| 271 | if (!Parent) |
| 272 | return nullptr; |
| 273 | for (;; Parent = cast<Decl>(Parent->getDeclContext())) { |
| 274 | if (isa<TranslationUnitDecl>(Parent)) |
| 275 | return nullptr; |
| 276 | if (isa<LinkageSpecDecl>(Parent) || isa<BlockDecl>(Parent)) |
| 277 | continue; |
| 278 | if (auto NS = dyn_cast<NamespaceDecl>(Parent)) { |
| 279 | if (NS->isAnonymousNamespace()) |
| 280 | continue; |
| 281 | } else if (auto RD = dyn_cast<RecordDecl>(Parent)) { |
| 282 | if (RD->isAnonymousStructOrUnion()) |
| 283 | continue; |
| 284 | } else if (auto ND = dyn_cast<NamedDecl>(Parent)) { |
| 285 | if (shouldSkipNamelessDecl(ND)) |
| 286 | continue; |
| 287 | } |
| 288 | return Parent; |
| 289 | } |
| 290 | } |
| 291 | |
| 292 | static const Decl *getCanonicalDecl(const Decl *D) { |
| 293 | D = D->getCanonicalDecl(); |
| 294 | if (auto TD = dyn_cast<TemplateDecl>(D)) { |
| 295 | if (auto TTD = TD->getTemplatedDecl()) { |
| 296 | D = TTD; |
| 297 | isCanonicalDecl()", "/home/seafit/code_projects/clang_source/clang/lib/Index/IndexingContext.cpp", 297, __PRETTY_FUNCTION__))" file_link="../../../include/assert.h.html#88" macro="true">assert(D->isCanonicalDecl()); |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | return D; |
| 302 | } |
| 303 | |
| 304 | static bool shouldReportOccurrenceForSystemDeclOnlyMode( |
| 305 | bool IsRef, SymbolRoleSet Roles, ArrayRef<SymbolRelation> Relations) { |
| 306 | if (!IsRef) |
| 307 | return true; |
| 308 | |
| 309 | auto acceptForRelation = [](SymbolRoleSet roles) -> bool { |
| 310 | bool accept = false; |
| 311 | applyForEachSymbolRoleInterruptible(roles, [&accept](SymbolRole r) -> bool { |
| 312 | switch (r) { |
| 313 | case SymbolRole::RelationChildOf: |
| 314 | case SymbolRole::RelationBaseOf: |
| 315 | case SymbolRole::RelationOverrideOf: |
| 316 | case SymbolRole::RelationExtendedBy: |
| 317 | case SymbolRole::RelationAccessorOf: |
| 318 | case SymbolRole::RelationIBTypeOf: |
| 319 | accept = true; |
| 320 | return false; |
| 321 | case SymbolRole::Declaration: |
| 322 | case SymbolRole::Definition: |
| 323 | case SymbolRole::Reference: |
| 324 | case SymbolRole::Read: |
| 325 | case SymbolRole::Write: |
| 326 | case SymbolRole::Call: |
| 327 | case SymbolRole::Dynamic: |
| 328 | case SymbolRole::AddressOf: |
| 329 | case SymbolRole::Implicit: |
| 330 | case SymbolRole::Undefinition: |
| 331 | case SymbolRole::RelationReceivedBy: |
| 332 | case SymbolRole::RelationCalledBy: |
| 333 | case SymbolRole::RelationContainedBy: |
| 334 | case SymbolRole::RelationSpecializationOf: |
| 335 | case SymbolRole::NameReference: |
| 336 | return true; |
| 337 | } |
| 338 | llvm_unreachable("Unsupported SymbolRole value!"); |
| 339 | }); |
| 340 | return accept; |
| 341 | }; |
| 342 | |
| 343 | for (auto &Rel : Relations) { |
| 344 | if (acceptForRelation(Rel.Roles)) |
| 345 | return true; |
| 346 | } |
| 347 | |
| 348 | return false; |
| 349 | } |
| 350 | |
| 351 | bool IndexingContext::handleDeclOccurrence(const Decl *D, SourceLocation Loc, |
| 352 | bool IsRef, const Decl *Parent, |
| 353 | SymbolRoleSet Roles, |
| 354 | ArrayRef<SymbolRelation> Relations, |
| 355 | const Expr *OrigE, |
| 356 | const Decl *OrigD, |
| 357 | const DeclContext *ContainerDC) { |
| 358 | if (D->isImplicit() && !isa<ObjCMethodDecl>(D)) |
| 359 | return true; |
| 360 | if (!isa<NamedDecl>(D) || shouldSkipNamelessDecl(cast<NamedDecl>(D))) |
| 361 | return true; |
| 362 | |
| 363 | SourceManager &SM = Ctx->getSourceManager(); |
| 364 | FileID FID = SM.getFileID(SM.getFileLoc(Loc)); |
| 365 | if (FID.isInvalid()) |
| 366 | return true; |
| 367 | |
| 368 | bool Invalid = false; |
| 369 | const SrcMgr::SLocEntry &SEntry = SM.getSLocEntry(FID, &Invalid); |
| 370 | if (Invalid || !SEntry.isFile()) |
| 371 | return true; |
| 372 | |
| 373 | if (SEntry.getFile().getFileCharacteristic() != SrcMgr::C_User) { |
| 374 | switch (IndexOpts.SystemSymbolFilter) { |
| 375 | case IndexingOptions::SystemSymbolFilterKind::None: |
| 376 | return true; |
| 377 | case IndexingOptions::SystemSymbolFilterKind::DeclarationsOnly: |
| 378 | if (!shouldReportOccurrenceForSystemDeclOnlyMode(IsRef, Roles, Relations)) |
| 379 | return true; |
| 380 | break; |
| 381 | case IndexingOptions::SystemSymbolFilterKind::All: |
| 382 | break; |
| 383 | } |
| 384 | } |
| 385 | |
| 386 | if (!OrigD) |
| 387 | OrigD = D; |
| 388 | |
| 389 | if (isTemplateImplicitInstantiation(D)) { |
| 390 | if (!IsRef) |
| 391 | return true; |
| 392 | D = adjustTemplateImplicitInstantiation(D); |
| 393 | if (!D) |
| 394 | return true; |
| 395 | assert(!isTemplateImplicitInstantiation(D)); |
| 396 | } |
| 397 | |
| 398 | if (IsRef) |
| 399 | Roles |= (unsigned)SymbolRole::Reference; |
| 400 | else if (isDeclADefinition(OrigD, ContainerDC, *Ctx)) |
| 401 | Roles |= (unsigned)SymbolRole::Definition; |
| 402 | else |
| 403 | Roles |= (unsigned)SymbolRole::Declaration; |
| 404 | |
| 405 | D = getCanonicalDecl(D); |
| 406 | Parent = adjustParent(Parent); |
| 407 | if (Parent) |
| 408 | Parent = getCanonicalDecl(Parent); |
| 409 | |
| 410 | SmallVector<SymbolRelation, 6> FinalRelations; |
| 411 | FinalRelations.reserve(Relations.size()+1); |
| 412 | |
| 413 | auto addRelation = [&](SymbolRelation Rel) { |
| 414 | auto It = std::find_if(FinalRelations.begin(), FinalRelations.end(), |
| 415 | [&](SymbolRelation Elem)->bool { |
| 416 | return Elem.RelatedSymbol == Rel.RelatedSymbol; |
| 417 | }); |
| 418 | if (It != FinalRelations.end()) { |
| 419 | It->Roles |= Rel.Roles; |
| 420 | } else { |
| 421 | FinalRelations.push_back(Rel); |
| 422 | } |
| 423 | Roles |= Rel.Roles; |
| 424 | }; |
| 425 | |
| 426 | if (Parent) { |
| 427 | if (IsRef || (!isa<ParmVarDecl>(D) && isFunctionLocalSymbol(D))) { |
| 428 | addRelation(SymbolRelation{ |
| 429 | (unsigned)SymbolRole::RelationContainedBy, |
| 430 | Parent |
| 431 | }); |
| 432 | } else { |
| 433 | addRelation(SymbolRelation{ |
| 434 | (unsigned)SymbolRole::RelationChildOf, |
| 435 | Parent |
| 436 | }); |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | for (auto &Rel : Relations) { |
| 441 | addRelation(SymbolRelation(Rel.Roles, |
| 442 | Rel.RelatedSymbol->getCanonicalDecl())); |
| 443 | } |
| 444 | |
| 445 | IndexDataConsumer::ASTNodeInfo Node{OrigE, OrigD, Parent, ContainerDC}; |
| 446 | return DataConsumer.handleDeclOccurence(D, Roles, FinalRelations, Loc, Node); |
| 447 | } |
| 448 | |
| 449 | void IndexingContext::handleMacroDefined(const IdentifierInfo &Name, |
| 450 | SourceLocation Loc, |
| 451 | const MacroInfo &MI) { |
| 452 | SymbolRoleSet Roles = (unsigned)SymbolRole::Definition; |
| 453 | DataConsumer.handleMacroOccurence(&Name, &MI, Roles, Loc); |
| 454 | } |
| 455 | |
| 456 | void IndexingContext::handleMacroUndefined(const IdentifierInfo &Name, |
| 457 | SourceLocation Loc, |
| 458 | const MacroInfo &MI) { |
| 459 | SymbolRoleSet Roles = (unsigned)SymbolRole::Undefinition; |
| 460 | DataConsumer.handleMacroOccurence(&Name, &MI, Roles, Loc); |
| 461 | } |
| 462 | |
| 463 | void IndexingContext::handleMacroReference(const IdentifierInfo &Name, |
| 464 | SourceLocation Loc, |
| 465 | const MacroInfo &MI) { |
| 466 | SymbolRoleSet Roles = (unsigned)SymbolRole::Reference; |
| 467 | DataConsumer.handleMacroOccurence(&Name, &MI, Roles, Loc); |
| 468 | } |
| 469 | |