diff options
Diffstat (limited to 'contrib/llvm/tools/clang/lib/Index/IndexBody.cpp')
| -rw-r--r-- | contrib/llvm/tools/clang/lib/Index/IndexBody.cpp | 359 |
1 files changed, 359 insertions, 0 deletions
diff --git a/contrib/llvm/tools/clang/lib/Index/IndexBody.cpp b/contrib/llvm/tools/clang/lib/Index/IndexBody.cpp new file mode 100644 index 0000000..4908d85 --- /dev/null +++ b/contrib/llvm/tools/clang/lib/Index/IndexBody.cpp @@ -0,0 +1,359 @@ +//===- IndexBody.cpp - Indexing statements --------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "IndexingContext.h" +#include "clang/AST/RecursiveASTVisitor.h" + +using namespace clang; +using namespace clang::index; + +namespace { + +class BodyIndexer : public RecursiveASTVisitor<BodyIndexer> { + IndexingContext &IndexCtx; + const NamedDecl *Parent; + const DeclContext *ParentDC; + SmallVector<Stmt*, 16> StmtStack; + + typedef RecursiveASTVisitor<BodyIndexer> base; +public: + BodyIndexer(IndexingContext &indexCtx, + const NamedDecl *Parent, const DeclContext *DC) + : IndexCtx(indexCtx), Parent(Parent), ParentDC(DC) { } + + bool shouldWalkTypesOfTypeLocs() const { return false; } + + bool dataTraverseStmtPre(Stmt *S) { + StmtStack.push_back(S); + return true; + } + + bool dataTraverseStmtPost(Stmt *S) { + assert(StmtStack.back() == S); + StmtStack.pop_back(); + return true; + } + + bool TraverseTypeLoc(TypeLoc TL) { + IndexCtx.indexTypeLoc(TL, Parent, ParentDC); + return true; + } + + bool TraverseNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS) { + IndexCtx.indexNestedNameSpecifierLoc(NNS, Parent, ParentDC); + return true; + } + + SymbolRoleSet getRolesForRef(const Expr *E, + SmallVectorImpl<SymbolRelation> &Relations) { + SymbolRoleSet Roles{}; + assert(!StmtStack.empty() && E == StmtStack.back()); + if (StmtStack.size() == 1) + return Roles; + auto It = StmtStack.end()-2; + while (isa<CastExpr>(*It) || isa<ParenExpr>(*It)) { + if (auto ICE = dyn_cast<ImplicitCastExpr>(*It)) { + if (ICE->getCastKind() == CK_LValueToRValue) + Roles |= (unsigned)(unsigned)SymbolRole::Read; + } + if (It == StmtStack.begin()) + break; + --It; + } + const Stmt *Parent = *It; + + if (auto BO = dyn_cast<BinaryOperator>(Parent)) { + if (BO->getOpcode() == BO_Assign && BO->getLHS()->IgnoreParenCasts() == E) + Roles |= (unsigned)SymbolRole::Write; + + } else if (auto UO = dyn_cast<UnaryOperator>(Parent)) { + if (UO->isIncrementDecrementOp()) { + Roles |= (unsigned)SymbolRole::Read; + Roles |= (unsigned)SymbolRole::Write; + } else if (UO->getOpcode() == UO_AddrOf) { + Roles |= (unsigned)SymbolRole::AddressOf; + } + + } else if (auto CA = dyn_cast<CompoundAssignOperator>(Parent)) { + if (CA->getLHS()->IgnoreParenCasts() == E) { + Roles |= (unsigned)SymbolRole::Read; + Roles |= (unsigned)SymbolRole::Write; + } + + } else if (auto CE = dyn_cast<CallExpr>(Parent)) { + if (CE->getCallee()->IgnoreParenCasts() == E) { + addCallRole(Roles, Relations); + if (auto *ME = dyn_cast<MemberExpr>(E)) { + if (auto *CXXMD = dyn_cast_or_null<CXXMethodDecl>(ME->getMemberDecl())) + if (CXXMD->isVirtual() && !ME->hasQualifier()) { + Roles |= (unsigned)SymbolRole::Dynamic; + auto BaseTy = ME->getBase()->IgnoreImpCasts()->getType(); + if (!BaseTy.isNull()) + if (auto *CXXRD = BaseTy->getPointeeCXXRecordDecl()) + Relations.emplace_back((unsigned)SymbolRole::RelationReceivedBy, + CXXRD); + } + } + } else if (auto CXXOp = dyn_cast<CXXOperatorCallExpr>(CE)) { + if (CXXOp->getNumArgs() > 0 && CXXOp->getArg(0)->IgnoreParenCasts() == E) { + OverloadedOperatorKind Op = CXXOp->getOperator(); + if (Op == OO_Equal) { + Roles |= (unsigned)SymbolRole::Write; + } else if ((Op >= OO_PlusEqual && Op <= OO_PipeEqual) || + Op == OO_LessLessEqual || Op == OO_GreaterGreaterEqual || + Op == OO_PlusPlus || Op == OO_MinusMinus) { + Roles |= (unsigned)SymbolRole::Read; + Roles |= (unsigned)SymbolRole::Write; + } else if (Op == OO_Amp) { + Roles |= (unsigned)SymbolRole::AddressOf; + } + } + } + } + + return Roles; + } + + void addCallRole(SymbolRoleSet &Roles, + SmallVectorImpl<SymbolRelation> &Relations) { + Roles |= (unsigned)SymbolRole::Call; + if (auto *FD = dyn_cast<FunctionDecl>(ParentDC)) + Relations.emplace_back((unsigned)SymbolRole::RelationCalledBy, FD); + else if (auto *MD = dyn_cast<ObjCMethodDecl>(ParentDC)) + Relations.emplace_back((unsigned)SymbolRole::RelationCalledBy, MD); + } + + bool VisitDeclRefExpr(DeclRefExpr *E) { + SmallVector<SymbolRelation, 4> Relations; + SymbolRoleSet Roles = getRolesForRef(E, Relations); + return IndexCtx.handleReference(E->getDecl(), E->getLocation(), + Parent, ParentDC, Roles, Relations, E); + } + + bool VisitMemberExpr(MemberExpr *E) { + SourceLocation Loc = E->getMemberLoc(); + if (Loc.isInvalid()) + Loc = E->getLocStart(); + SmallVector<SymbolRelation, 4> Relations; + SymbolRoleSet Roles = getRolesForRef(E, Relations); + return IndexCtx.handleReference(E->getMemberDecl(), Loc, + Parent, ParentDC, Roles, Relations, E); + } + + bool VisitDesignatedInitExpr(DesignatedInitExpr *E) { + for (DesignatedInitExpr::Designator &D : llvm::reverse(E->designators())) { + if (D.isFieldDesignator()) + return IndexCtx.handleReference(D.getField(), D.getFieldLoc(), Parent, + ParentDC, SymbolRoleSet(), {}, E); + } + return true; + } + + bool VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) { + SmallVector<SymbolRelation, 4> Relations; + SymbolRoleSet Roles = getRolesForRef(E, Relations); + return IndexCtx.handleReference(E->getDecl(), E->getLocation(), + Parent, ParentDC, Roles, Relations, E); + } + + bool VisitObjCMessageExpr(ObjCMessageExpr *E) { + auto isDynamic = [](const ObjCMessageExpr *MsgE)->bool { + if (MsgE->getReceiverKind() != ObjCMessageExpr::Instance) + return false; + if (auto *RecE = dyn_cast<ObjCMessageExpr>( + MsgE->getInstanceReceiver()->IgnoreParenCasts())) { + if (RecE->getMethodFamily() == OMF_alloc) + return false; + } + return true; + }; + + if (ObjCMethodDecl *MD = E->getMethodDecl()) { + SymbolRoleSet Roles{}; + SmallVector<SymbolRelation, 2> Relations; + addCallRole(Roles, Relations); + if (E->isImplicit()) + Roles |= (unsigned)SymbolRole::Implicit; + + if (isDynamic(E)) { + Roles |= (unsigned)SymbolRole::Dynamic; + if (auto *RecD = E->getReceiverInterface()) + Relations.emplace_back((unsigned)SymbolRole::RelationReceivedBy, RecD); + } + + return IndexCtx.handleReference(MD, E->getSelectorStartLoc(), + Parent, ParentDC, Roles, Relations, E); + } + return true; + } + + bool VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) { + if (E->isExplicitProperty()) + return IndexCtx.handleReference(E->getExplicitProperty(), E->getLocation(), + Parent, ParentDC, SymbolRoleSet(), {}, E); + + // No need to do a handleReference for the objc method, because there will + // be a message expr as part of PseudoObjectExpr. + return true; + } + + bool VisitMSPropertyRefExpr(MSPropertyRefExpr *E) { + return IndexCtx.handleReference(E->getPropertyDecl(), E->getMemberLoc(), + Parent, ParentDC, SymbolRoleSet(), {}, E); + } + + bool VisitObjCProtocolExpr(ObjCProtocolExpr *E) { + return IndexCtx.handleReference(E->getProtocol(), E->getProtocolIdLoc(), + Parent, ParentDC, SymbolRoleSet(), {}, E); + } + + bool passObjCLiteralMethodCall(const ObjCMethodDecl *MD, const Expr *E) { + SymbolRoleSet Roles{}; + SmallVector<SymbolRelation, 2> Relations; + addCallRole(Roles, Relations); + Roles |= (unsigned)SymbolRole::Implicit; + return IndexCtx.handleReference(MD, E->getLocStart(), + Parent, ParentDC, Roles, Relations, E); + } + + bool VisitObjCBoxedExpr(ObjCBoxedExpr *E) { + if (ObjCMethodDecl *MD = E->getBoxingMethod()) { + return passObjCLiteralMethodCall(MD, E); + } + return true; + } + + bool VisitObjCDictionaryLiteral(ObjCDictionaryLiteral *E) { + if (ObjCMethodDecl *MD = E->getDictWithObjectsMethod()) { + return passObjCLiteralMethodCall(MD, E); + } + return true; + } + + bool VisitObjCArrayLiteral(ObjCArrayLiteral *E) { + if (ObjCMethodDecl *MD = E->getArrayWithObjectsMethod()) { + return passObjCLiteralMethodCall(MD, E); + } + return true; + } + + bool VisitCXXConstructExpr(CXXConstructExpr *E) { + SymbolRoleSet Roles{}; + SmallVector<SymbolRelation, 2> Relations; + addCallRole(Roles, Relations); + return IndexCtx.handleReference(E->getConstructor(), E->getLocation(), + Parent, ParentDC, Roles, Relations, E); + } + + bool TraverseCXXOperatorCallExpr(CXXOperatorCallExpr *E, + DataRecursionQueue *Q = nullptr) { + if (E->getOperatorLoc().isInvalid()) + return true; // implicit. + return base::TraverseCXXOperatorCallExpr(E, Q); + } + + bool VisitDeclStmt(DeclStmt *S) { + if (IndexCtx.shouldIndexFunctionLocalSymbols()) { + IndexCtx.indexDeclGroupRef(S->getDeclGroup()); + return true; + } + + DeclGroupRef DG = S->getDeclGroup(); + for (DeclGroupRef::iterator I = DG.begin(), E = DG.end(); I != E; ++I) { + const Decl *D = *I; + if (!D) + continue; + if (!IndexCtx.isFunctionLocalDecl(D)) + IndexCtx.indexTopLevelDecl(D); + } + + return true; + } + + bool TraverseLambdaCapture(LambdaExpr *LE, const LambdaCapture *C) { + if (C->capturesThis() || C->capturesVLAType()) + return true; + + if (C->capturesVariable() && IndexCtx.shouldIndexFunctionLocalSymbols()) + return IndexCtx.handleReference(C->getCapturedVar(), C->getLocation(), + Parent, ParentDC, SymbolRoleSet()); + + // FIXME: Lambda init-captures. + return true; + } + + // RecursiveASTVisitor visits both syntactic and semantic forms, duplicating + // the things that we visit. Make sure to only visit the semantic form. + // Also visit things that are in the syntactic form but not the semantic one, + // for example the indices in DesignatedInitExprs. + bool TraverseInitListExpr(InitListExpr *S, DataRecursionQueue *Q = nullptr) { + + class SyntacticFormIndexer : + public RecursiveASTVisitor<SyntacticFormIndexer> { + IndexingContext &IndexCtx; + const NamedDecl *Parent; + const DeclContext *ParentDC; + + public: + SyntacticFormIndexer(IndexingContext &indexCtx, + const NamedDecl *Parent, const DeclContext *DC) + : IndexCtx(indexCtx), Parent(Parent), ParentDC(DC) { } + + bool shouldWalkTypesOfTypeLocs() const { return false; } + + bool VisitDesignatedInitExpr(DesignatedInitExpr *E) { + for (DesignatedInitExpr::Designator &D : llvm::reverse(E->designators())) { + if (D.isFieldDesignator()) + return IndexCtx.handleReference(D.getField(), D.getFieldLoc(), + Parent, ParentDC, SymbolRoleSet(), + {}, E); + } + return true; + } + }; + + auto visitForm = [&](InitListExpr *Form) { + for (Stmt *SubStmt : Form->children()) { + if (!TraverseStmt(SubStmt, Q)) + return false; + } + return true; + }; + + InitListExpr *SemaForm = S->isSemanticForm() ? S : S->getSemanticForm(); + InitListExpr *SyntaxForm = S->isSemanticForm() ? S->getSyntacticForm() : S; + + if (SemaForm) { + // Visit things present in syntactic form but not the semantic form. + if (SyntaxForm) { + SyntacticFormIndexer(IndexCtx, Parent, ParentDC).TraverseStmt(SyntaxForm); + } + return visitForm(SemaForm); + } + + // No semantic, try the syntactic. + if (SyntaxForm) { + return visitForm(SyntaxForm); + } + + return true; + } +}; + +} // anonymous namespace + +void IndexingContext::indexBody(const Stmt *S, const NamedDecl *Parent, + const DeclContext *DC) { + if (!S) + return; + + if (!DC) + DC = Parent->getLexicalDeclContext(); + BodyIndexer(*this, Parent, DC).TraverseStmt(const_cast<Stmt*>(S)); +} |
