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Index.cpp
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//===--- Index.cpp --------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include "swift/Index/Index.h"
#include "swift/AST/AST.h"
#include "swift/AST/SourceEntityWalker.h"
#include "swift/AST/USRGeneration.h"
#include "swift/Basic/SourceManager.h"
#include "swift/Basic/StringExtras.h"
#include "llvm/ADT/APInt.h"
#include "llvm/Support/FileSystem.h"
using namespace swift;
using namespace swift::index;
static bool printDisplayName(const swift::ValueDecl *D, llvm::raw_ostream &OS) {
if (!D->hasName())
return true;
OS << D->getFullName();
return false;
}
namespace {
// Adapter providing a common interface for a SourceFile/Module.
class SourceFileOrModule {
llvm::PointerUnion<SourceFile *, Module *> SFOrMod;
public:
SourceFileOrModule(SourceFile &SF) : SFOrMod(&SF) {}
SourceFileOrModule(Module &Mod) : SFOrMod(&Mod) {}
SourceFile *getAsSourceFile() const {
return SFOrMod.dyn_cast<SourceFile *>();
}
Module *getAsModule() const { return SFOrMod.dyn_cast<Module *>(); }
Module &getModule() const {
if (auto SF = SFOrMod.dyn_cast<SourceFile *>())
return *SF->getParentModule();
return *SFOrMod.get<Module *>();
}
ArrayRef<FileUnit *> getFiles() const {
return SFOrMod.is<SourceFile *>() ? *SFOrMod.getAddrOfPtr1()
: SFOrMod.get<Module *>()->getFiles();
}
StringRef getFilename() const {
if (SourceFile *SF = SFOrMod.dyn_cast<SourceFile *>())
return SF->getFilename();
return SFOrMod.get<Module *>()->getModuleFilename();
}
void
getImportedModules(SmallVectorImpl<Module::ImportedModule> &Modules) const {
if (SourceFile *SF = SFOrMod.dyn_cast<SourceFile *>()) {
SF->getImportedModules(Modules, Module::ImportFilter::All);
} else {
SFOrMod.get<Module *>()->getImportedModules(Modules,
Module::ImportFilter::All);
}
}
};
class IndexSwiftASTWalker : public SourceEntityWalker {
IndexDataConsumer &IdxConsumer;
SourceManager &SrcMgr;
unsigned BufferID;
bool enableWarnings;
bool IsModuleFile = false;
bool isSystemModule = false;
struct Entity {
Decl *D;
SymbolKind Kind;
SymbolSubKindSet SubKinds;
SymbolRoleSet Roles;
};
SmallVector<Entity, 6> EntitiesStack;
SmallVector<Expr *, 8> ExprStack;
bool Cancelled = false;
struct NameAndUSR {
StringRef USR;
StringRef name;
};
typedef llvm::PointerIntPair<Decl *, 3> DeclAccessorPair;
llvm::DenseMap<Decl *, NameAndUSR> nameAndUSRCache;
llvm::DenseMap<DeclAccessorPair, StringRef> accessorUSRCache;
StringScratchSpace stringStorage;
bool getNameAndUSR(ValueDecl *D, StringRef &name, StringRef &USR) {
auto &result = nameAndUSRCache[D];
if (result.USR.empty()) {
SmallString<128> storage;
{
llvm::raw_svector_ostream OS(storage);
if (ide::printDeclUSR(D, OS))
return true;
result.USR = stringStorage.copyString(OS.str());
}
storage.clear();
{
llvm::raw_svector_ostream OS(storage);
printDisplayName(D, OS);
result.name = stringStorage.copyString(OS.str());
}
}
name = result.name;
USR = result.USR;
return false;
}
StringRef getAccessorUSR(AbstractStorageDecl *D, AccessorKind AK) {
assert(AK != AccessorKind::NotAccessor);
assert(static_cast<int>(AK) < 0x111 && "AccessorKind too big for pair");
DeclAccessorPair key(D, static_cast<int>(AK));
auto &result = accessorUSRCache[key];
if (result.empty()) {
SmallString<128> storage;
llvm::raw_svector_ostream OS(storage);
ide::printAccessorUSR(D, AK, OS);
result = stringStorage.copyString(OS.str());
}
return result;
}
public:
IndexSwiftASTWalker(IndexDataConsumer &IdxConsumer, ASTContext &Ctx,
unsigned BufferID)
: IdxConsumer(IdxConsumer), SrcMgr(Ctx.SourceMgr), BufferID(BufferID),
enableWarnings(IdxConsumer.enableWarnings()) {}
~IndexSwiftASTWalker() { assert(Cancelled || EntitiesStack.empty()); }
void visitModule(Module &Mod, StringRef Hash);
private:
bool visitImports(SourceFileOrModule Mod,
llvm::SmallPtrSet<Module *, 16> &Visited);
bool handleSourceOrModuleFile(SourceFileOrModule SFOrMod, StringRef KnownHash,
bool &HashIsKnown);
bool walkToDeclPre(Decl *D, CharSourceRange Range) override {
// Do not handle unavailable decls.
if (AvailableAttr::isUnavailable(D))
return false;
if (FuncDecl *FD = dyn_cast<FuncDecl>(D)) {
if (FD->isAccessor() && getParentDecl() != FD->getAccessorStorageDecl())
return false; // already handled as part of the var decl.
}
if (ValueDecl *VD = dyn_cast<ValueDecl>(D)) {
if (!report(VD))
return false;
if (SubscriptDecl *SD = dyn_cast<SubscriptDecl>(VD)) {
// Avoid indexing the indices, only walk the getter/setter.
if (SD->getGetter())
if (SourceEntityWalker::walk(cast<Decl>(SD->getGetter())))
return false;
if (SD->getSetter())
if (SourceEntityWalker::walk(cast<Decl>(SD->getSetter())))
return false;
if (SD->hasAddressors()) {
if (auto FD = SD->getAddressor())
SourceEntityWalker::walk(cast<Decl>(FD));
if (Cancelled)
return false;
if (auto FD = SD->getMutableAddressor())
SourceEntityWalker::walk(cast<Decl>(FD));
}
walkToDeclPost(D);
return false; // already walked what we needed.
}
}
if (ExtensionDecl *ED = dyn_cast<ExtensionDecl>(D))
return reportExtension(ED);
return true;
}
bool walkToDeclPost(Decl *D) override {
if (Cancelled)
return false;
if (getParentDecl() == D)
return finishCurrentEntity();
return true;
}
bool walkToExprPre(Expr *E) override {
if (Cancelled)
return false;
ExprStack.push_back(E);
return true;
}
bool walkToExprPost(Expr *E) override {
if (Cancelled)
return false;
assert(ExprStack.back() == E);
ExprStack.pop_back();
return true;
}
bool visitDeclReference(ValueDecl *D, CharSourceRange Range,
TypeDecl *CtorTyRef, Type T) override {
SourceLoc Loc = Range.getStart();
if (CtorTyRef)
if (!reportRef(CtorTyRef, Loc))
return false;
if (!reportRef(D, Loc))
return false;
return true;
}
Decl *getParentDecl() {
if (!EntitiesStack.empty())
return EntitiesStack.back().D;
return nullptr;
}
Expr *getParentExpr() {
if (ExprStack.size() >= 2)
return ExprStack.end()[-2];
return nullptr;
}
bool reportExtension(ExtensionDecl *D);
bool report(ValueDecl *D);
bool reportRef(ValueDecl *D, SourceLoc Loc);
bool startEntityDecl(ValueDecl *D);
bool startEntityRef(ValueDecl *D, SourceLoc Loc);
bool startEntity(ValueDecl *D, const IndexSymbol &Info);
bool passRelated(ValueDecl *D, SourceLoc Loc);
bool passInheritedTypes(ArrayRef<TypeLoc> Inherited);
bool passRelatedType(const TypeLoc &Ty);
NominalTypeDecl *getTypeLocAsNominalTypeDecl(const TypeLoc &Ty);
bool reportPseudoGetterDecl(VarDecl *D) {
return reportPseudoAccessor(D, AccessorKind::IsGetter, /*IsRef=*/false,
D->getLoc());
}
bool reportPseudoSetterDecl(VarDecl *D) {
return reportPseudoAccessor(D, AccessorKind::IsSetter, /*IsRef=*/false,
D->getLoc());
}
bool reportPseudoAccessor(AbstractStorageDecl *D, AccessorKind AccKind,
bool IsRef, SourceLoc Loc);
bool finishCurrentEntity() {
Entity CurrEnt = EntitiesStack.pop_back_val();
assert(CurrEnt.Kind != SymbolKind::Unknown);
if (!IdxConsumer.finishSourceEntity(CurrEnt.Kind, CurrEnt.SubKinds,
CurrEnt.Roles)) {
Cancelled = true;
return false;
}
return true;
}
bool initIndexSymbol(ValueDecl *D, SourceLoc Loc, bool IsRef,
IndexSymbol &Info);
bool initFuncDeclIndexSymbol(ValueDecl *D, IndexSymbol &Info);
bool initCallRefIndexSymbol(Expr *CurrentE, Expr *ParentE, ValueDecl *D,
SourceLoc Loc, IndexSymbol &Info);
std::pair<unsigned, unsigned> getLineCol(SourceLoc Loc) {
if (Loc.isInvalid())
return std::make_pair(0, 0);
return SrcMgr.getLineAndColumn(Loc, BufferID);
}
bool shouldIndex(ValueDecl *D) const {
if (D->isImplicit())
return false;
if (isLocal(D))
return false;
if (D->isPrivateStdlibDecl())
return false;
return true;
}
bool isLocal(ValueDecl *D) const {
return D->getDeclContext()->getLocalContext();
}
void getModuleHash(SourceFileOrModule SFOrMod, llvm::raw_ostream &OS);
llvm::hash_code hashModule(llvm::hash_code code, SourceFileOrModule SFOrMod);
llvm::hash_code hashFileReference(llvm::hash_code code,
SourceFileOrModule SFOrMod);
void getRecursiveModuleImports(Module &Mod,
SmallVectorImpl<Module *> &Imports);
void collectRecursiveModuleImports(Module &Mod,
llvm::SmallPtrSet<Module *, 16> &Visited);
template <typename F>
void warn(F log) {
if (!enableWarnings)
return;
SmallString<128> warning;
llvm::raw_svector_ostream OS(warning);
log(OS);
}
// This maps a module to all its imports, recursively.
llvm::DenseMap<Module *, llvm::SmallVector<Module *, 4>> ImportsMap;
};
} // anonymous namespace
void IndexSwiftASTWalker::visitModule(Module &Mod, StringRef KnownHash) {
SourceFile *SrcFile = nullptr;
for (auto File : Mod.getFiles()) {
if (auto SF = dyn_cast<SourceFile>(File)) {
auto BufID = SF->getBufferID();
if (BufID.hasValue() && *BufID == BufferID) {
SrcFile = SF;
break;
}
}
}
bool HashIsKnown;
if (SrcFile != nullptr) {
IsModuleFile = false;
if (!handleSourceOrModuleFile(*SrcFile, KnownHash, HashIsKnown))
return;
if (HashIsKnown)
return; // No need to report symbols.
walk(*SrcFile);
} else {
IsModuleFile = true;
isSystemModule = Mod.isSystemModule();
if (!handleSourceOrModuleFile(Mod, KnownHash, HashIsKnown))
return;
if (HashIsKnown)
return; // No need to report symbols.
walk(Mod);
}
}
bool IndexSwiftASTWalker::handleSourceOrModuleFile(SourceFileOrModule SFOrMod,
StringRef KnownHash,
bool &HashIsKnown) {
// Common reporting for TU/module file.
SmallString<32> HashBuf;
{
llvm::raw_svector_ostream HashOS(HashBuf);
getModuleHash(SFOrMod, HashOS);
StringRef Hash = HashOS.str();
HashIsKnown = Hash == KnownHash;
if (!IdxConsumer.recordHash(Hash, HashIsKnown))
return false;
}
// We always report the dependencies, even if the hash is known.
llvm::SmallPtrSet<Module *, 16> Visited;
return visitImports(SFOrMod, Visited);
}
bool IndexSwiftASTWalker::visitImports(
SourceFileOrModule TopMod, llvm::SmallPtrSet<Module *, 16> &Visited) {
// Dependencies of the stdlib module (like SwiftShims module) are
// implementation details.
if (TopMod.getModule().isStdlibModule())
return true;
bool IsNew = Visited.insert(&TopMod.getModule()).second;
if (!IsNew)
return true;
SmallVector<Module::ImportedModule, 8> Imports;
TopMod.getImportedModules(Imports);
llvm::SmallPtrSet<Module *, 8> Reported;
for (auto Import : Imports) {
Module *Mod = Import.second;
bool NewReport = Reported.insert(Mod).second;
if (!NewReport)
continue;
// FIXME: Handle modules with multiple source files; these will fail on
// getModuleFilename() (by returning an empty path). Note that such modules
// may be heterogeneous.
StringRef Path = Mod->getModuleFilename();
if (Path.empty() || Path == TopMod.getFilename())
continue; // this is a submodule.
SymbolKind ImportKind = SymbolKind::Unknown;
for (auto File : Mod->getFiles()) {
switch (File->getKind()) {
case FileUnitKind::Source:
case FileUnitKind::Builtin:
case FileUnitKind::Derived:
break;
case FileUnitKind::SerializedAST:
assert(ImportKind == SymbolKind::Unknown &&
"cannot handle multi-file modules");
ImportKind = SymbolKind::Module;
break;
case FileUnitKind::ClangModule:
assert(ImportKind == SymbolKind::Unknown &&
"cannot handle multi-file modules");
ImportKind = SymbolKind::ClangModule;
break;
}
}
if (ImportKind == SymbolKind::Unknown)
continue;
StringRef Hash;
SmallString<32> HashBuf;
if (ImportKind != SymbolKind::ClangModule) {
llvm::raw_svector_ostream HashOS(HashBuf);
getModuleHash(*Mod, HashOS);
Hash = HashOS.str();
}
if (!IdxConsumer.startDependency(ImportKind, Mod->getName().str(), Path,
Mod->isSystemModule(), Hash))
return false;
if (ImportKind != SymbolKind::ClangModule)
if (!visitImports(*Mod, Visited))
return false;
if (!IdxConsumer.finishDependency(ImportKind))
return false;
}
return true;
}
bool IndexSwiftASTWalker::startEntityDecl(ValueDecl *D) {
if (!shouldIndex(D))
return false;
SourceLoc Loc = D->getLoc();
if (Loc.isInvalid() && !IsModuleFile)
return false;
if (isa<FuncDecl>(D)) {
IndexSymbol Info;
if (initFuncDeclIndexSymbol(D, Info))
return false;
return startEntity(D, Info);
} else {
IndexSymbol Info;
if (initIndexSymbol(D, Loc, /*isRef=*/false, Info))
return false;
return startEntity(D, Info);
}
}
bool IndexSwiftASTWalker::startEntityRef(ValueDecl *D, SourceLoc Loc) {
if (!shouldIndex(D))
return false;
if (Loc.isInvalid())
return false;
if (isa<AbstractFunctionDecl>(D)) {
IndexSymbol Info;
if (initCallRefIndexSymbol(ExprStack.back(), getParentExpr(), D, Loc, Info))
return false;
return startEntity(D, Info);
} else {
IndexSymbol Info;
if (initIndexSymbol(D, Loc, /*isRef=*/true, Info))
return false;
return startEntity(D, Info);
}
}
bool IndexSwiftASTWalker::startEntity(ValueDecl *D, const IndexSymbol &Info) {
if (!IdxConsumer.startSourceEntity(Info)) {
Cancelled = true;
return false;
}
EntitiesStack.push_back({D, Info.kind, Info.subKinds, Info.roles});
return true;
}
bool IndexSwiftASTWalker::passRelated(ValueDecl *D, SourceLoc Loc) {
if (!shouldIndex(D))
return false;
IndexSymbol Info;
if (initIndexSymbol(D, Loc, /*isRef=*/true, Info))
return false;
if (!IdxConsumer.recordRelatedEntity(Info)) {
Cancelled = true;
return false;
}
return true;
}
bool IndexSwiftASTWalker::passInheritedTypes(ArrayRef<TypeLoc> Inherited) {
for (auto Base : Inherited) {
passRelatedType(Base);
}
return true;
}
bool IndexSwiftASTWalker::passRelatedType(const TypeLoc &Ty) {
if (IdentTypeRepr *T = dyn_cast_or_null<IdentTypeRepr>(Ty.getTypeRepr())) {
auto Comps = T->getComponentRange();
if (auto NTD =
dyn_cast_or_null<NominalTypeDecl>(Comps.back()->getBoundDecl())) {
if (!passRelated(NTD, Comps.back()->getIdLoc()))
return false;
}
return true;
}
if (Ty.getType()) {
if (auto nominal = dyn_cast_or_null<NominalTypeDecl>(
Ty.getType()->getDirectlyReferencedTypeDecl()))
if (!passRelated(nominal, Ty.getLoc()))
return false;
}
return true;
}
static SymbolSubKind getSubKindForAccessor(AccessorKind AK) {
switch (AK) {
case AccessorKind::NotAccessor: return SymbolSubKind::None;
case AccessorKind::IsGetter: return SymbolSubKind::AccessorGetter;
case AccessorKind::IsSetter: return SymbolSubKind::AccessorSetter;
case AccessorKind::IsWillSet: return SymbolSubKind::AccessorWillSet;
case AccessorKind::IsDidSet: return SymbolSubKind::AccessorDidSet;
case AccessorKind::IsAddressor: return SymbolSubKind::AccessorAddressor;
case AccessorKind::IsMutableAddressor:
return SymbolSubKind::AccessorMutableAddressor;
case AccessorKind::IsMaterializeForSet:
llvm_unreachable("unexpected MaterializeForSet");
}
}
bool IndexSwiftASTWalker::reportPseudoAccessor(AbstractStorageDecl *D,
AccessorKind AccKind, bool IsRef,
SourceLoc Loc) {
if (!shouldIndex(D))
return true; // continue walking.
auto handleInfo = [this, D, AccKind](IndexSymbol &Info) {
Info.kind = SymbolKind::Accessor;
Info.subKinds |= getSubKindForAccessor(AccKind);
Info.name = "";
Info.USR = getAccessorUSR(D, AccKind);
Info.group = "";
if (!IdxConsumer.startSourceEntity(Info)) {
Cancelled = true;
return false;
}
if (!IdxConsumer.finishSourceEntity(Info.kind, Info.subKinds, Info.roles)) {
Cancelled = true;
return false;
}
return true;
};
if (IsRef) {
IndexSymbol Info;
if (initCallRefIndexSymbol(ExprStack.back(), getParentExpr(), D, Loc, Info))
return true; // continue walking.
return handleInfo(Info);
} else {
IndexSymbol Info;
if (initIndexSymbol(D, Loc, IsRef, Info))
return true; // continue walking.
return handleInfo(Info);
}
}
NominalTypeDecl *
IndexSwiftASTWalker::getTypeLocAsNominalTypeDecl(const TypeLoc &Ty) {
if (Type T = Ty.getType())
return dyn_cast_or_null<NominalTypeDecl>(
T->getDirectlyReferencedTypeDecl());
if (IdentTypeRepr *T = dyn_cast_or_null<IdentTypeRepr>(Ty.getTypeRepr())) {
auto Comp = T->getComponentRange().back();
if (auto NTD = dyn_cast_or_null<NominalTypeDecl>(Comp->getBoundDecl()))
return NTD;
}
return nullptr;
}
bool IndexSwiftASTWalker::reportExtension(ExtensionDecl *D) {
SourceLoc Loc = D->getExtendedTypeLoc().getSourceRange().Start;
if (!D->getExtendedType())
return true;
NominalTypeDecl *NTD = D->getExtendedType()->getAnyNominal();
if (!NTD)
return true;
if (!shouldIndex(NTD))
return true;
IndexSymbol Info;
if (initIndexSymbol(NTD, Loc, /*isRef=*/false, Info))
return true;
Info.kind = getSymbolKindForDecl(D);
if (isa<StructDecl>(NTD))
Info.subKinds |= SymbolSubKind::ExtensionOfStruct;
else if (isa<ClassDecl>(NTD))
Info.subKinds |= SymbolSubKind::ExtensionOfClass;
else if (isa<EnumDecl>(NTD))
Info.subKinds |= SymbolSubKind::ExtensionOfEnum;
else if (isa<ProtocolDecl>(NTD))
Info.subKinds |= SymbolSubKind::ExtensionOfProtocol;
assert(Info.subKinds != 0);
if (!IdxConsumer.startSourceEntity(Info)) {
Cancelled = true;
return false;
}
passInheritedTypes(D->getInherited());
if (Cancelled)
return false;
EntitiesStack.push_back({D, Info.kind, Info.subKinds, Info.roles});
return true;
}
bool IndexSwiftASTWalker::report(ValueDecl *D) {
if (startEntityDecl(D)) {
if (TypeDecl *TD = dyn_cast<NominalTypeDecl>(D))
passInheritedTypes(TD->getInherited());
if (Cancelled)
return false;
if (auto Overridden = D->getOverriddenDecl()) {
passRelated(Overridden, SourceLoc());
if (Cancelled)
return false;
}
for (auto Conf : D->getSatisfiedProtocolRequirements()) {
passRelated(Conf, SourceLoc());
if (Cancelled)
return false;
}
// Pass accessors.
if (auto VarD = dyn_cast<VarDecl>(D)) {
if (!VarD->getGetter() && !VarD->getSetter()) {
// No actual getter or setter, pass 'pseudo' accessors.
// We create accessor entities so we can implement the functionality
// of libclang, which reports implicit method property accessor
// declarations, invocations, and overrides for properties.
// Note that an ObjC class subclassing from a Swift class, may still
// be able to override its non-computed-property-accessors via a
// method.
if (!reportPseudoGetterDecl(VarD))
return false;
if (!reportPseudoSetterDecl(VarD))
return false;
} else {
if (auto FD = VarD->getGetter())
SourceEntityWalker::walk(cast<Decl>(FD));
if (Cancelled)
return false;
if (auto FD = VarD->getSetter())
SourceEntityWalker::walk(cast<Decl>(FD));
if (Cancelled)
return false;
if (VarD->hasObservers()) {
if (auto FD = VarD->getWillSetFunc())
SourceEntityWalker::walk(cast<Decl>(FD));
if (Cancelled)
return false;
if (auto FD = VarD->getDidSetFunc())
SourceEntityWalker::walk(cast<Decl>(FD));
if (Cancelled)
return false;
}
if (VarD->hasAddressors()) {
if (auto FD = VarD->getAddressor())
SourceEntityWalker::walk(cast<Decl>(FD));
if (Cancelled)
return false;
if (auto FD = VarD->getMutableAddressor())
SourceEntityWalker::walk(cast<Decl>(FD));
}
}
}
}
return !Cancelled;
}
bool IndexSwiftASTWalker::reportRef(ValueDecl *D, SourceLoc Loc) {
if (startEntityRef(D, Loc)) {
// Report the accessors that were utilized.
if (isa<AbstractStorageDecl>(D) && getParentExpr()) {
bool UsesGetter = false;
bool UsesSetter = false;
Expr *CurrE = ExprStack.back();
Expr *Parent = getParentExpr();
bool isLValue =
!CurrE->getType().isNull() && CurrE->getType()->is<LValueType>();
if (isa<LoadExpr>(Parent) || !isLValue) {
UsesGetter = true;
} else if (isa<AssignExpr>(Parent)) {
UsesSetter = true;
} else {
UsesGetter = UsesSetter = true;
}
AbstractStorageDecl *ASD = cast<AbstractStorageDecl>(D);
if (UsesGetter)
if (!reportPseudoAccessor(ASD, AccessorKind::IsGetter, /*IsRef=*/true,
Loc))
return false;
if (UsesSetter)
if (!reportPseudoAccessor(ASD, AccessorKind::IsSetter, /*IsRef=*/true,
Loc))
return false;
}
assert(EntitiesStack.back().D == D);
return finishCurrentEntity();
}
return !Cancelled;
}
bool IndexSwiftASTWalker::initIndexSymbol(ValueDecl *D, SourceLoc Loc,
bool IsRef, IndexSymbol &Info) {
assert(D);
Info.decl = D;
Info.kind = getSymbolKindForDecl(D);
if (Info.kind == SymbolKind::Unknown)
return true;
if (Info.kind == SymbolKind::Accessor)
Info.subKinds |= getSubKindForAccessor(cast<FuncDecl>(D)->getAccessorKind());
// Cannot be extension, which is not a ValueDecl.
if (IsRef)
Info.roles |= (unsigned)SymbolRole::Reference;
else
Info.roles |= (unsigned)SymbolRole::Definition;
if (getNameAndUSR(D, Info.name, Info.USR))
return true;
std::tie(Info.line, Info.column) = getLineCol(Loc);
if (!IsRef) {
if (auto Group = D->getGroupName())
Info.group = Group.getValue();
}
return false;
}
static NominalTypeDecl *getNominalParent(ValueDecl *D) {
Type Ty = D->getDeclContext()->getDeclaredTypeOfContext();
if (!Ty)
return nullptr;
return Ty->getAnyNominal();
}
static bool isTestCandidate(ValueDecl *D) {
if (!D->hasName())
return false;
// A 'test candidate' is a class instance method that returns void, has no
// parameters and starts with 'test'.
// FIXME: Also test if it is ObjC exportable ?
if (auto FD = dyn_cast<FuncDecl>(D)) {
if (FD->isStatic())
return false;
if (!D->getDeclContext()->isTypeContext())
return false;
auto NTD = getNominalParent(D);
if (!NTD)
return false;
Type RetTy = FD->getResultType();
if (FD->getParameterLists().size() != 2)
return false;
auto paramList = FD->getParameterList(1);
if (RetTy && RetTy->isVoid() && isa<ClassDecl>(NTD) &&
paramList->size() == 0 && FD->getName().str().startswith("test"))
return true;
}
return false;
}
bool IndexSwiftASTWalker::initFuncDeclIndexSymbol(ValueDecl *D,
IndexSymbol &Info) {
if (initIndexSymbol(D, D->getLoc(), /*IsRef=*/false, Info))
return true;
if (isTestCandidate(D))
Info.subKinds |= SymbolSubKind::UnitTest;
if (auto Group = D->getGroupName())
Info.group = Group.getValue();
return false;
}
static bool isSuperRefExpr(Expr *E) {
if (!E)
return false;
if (isa<SuperRefExpr>(E))
return true;
if (auto LoadE = dyn_cast<LoadExpr>(E))
return isSuperRefExpr(LoadE->getSubExpr());
return false;
}
static bool isDynamicCall(Expr *BaseE, ValueDecl *D) {
// The call is 'dynamic' if the method is not of a struct and the
// receiver is not 'super'. Note that if the receiver is 'super' that
// does not mean that the call is statically determined (an extension
// method may have injected itself in the super hierarchy).
// For our purposes 'dynamic' means that the method call cannot invoke
// a method in a subclass.
auto TyD = getNominalParent(D);
if (!TyD)
return false;
if (isa<StructDecl>(TyD))
return false;
if (isSuperRefExpr(BaseE))
return false;
if (BaseE->getType()->is<MetatypeType>())
return false;
return true;
}
bool IndexSwiftASTWalker::initCallRefIndexSymbol(Expr *CurrentE, Expr *ParentE,
ValueDecl *D, SourceLoc Loc,
IndexSymbol &Info) {
if (!ParentE)
return true;
if (initIndexSymbol(D, Loc, /*IsRef=*/true, Info))
return true;
Info.roles |= (unsigned)SymbolRole::Call;
Expr *BaseE = nullptr;
if (auto DotE = dyn_cast<DotSyntaxCallExpr>(ParentE))
BaseE = DotE->getBase();
else if (auto MembE = dyn_cast<MemberRefExpr>(CurrentE))
BaseE = MembE->getBase();
else if (auto SubsE = dyn_cast<SubscriptExpr>(CurrentE))
BaseE = SubsE->getBase();
if (!BaseE || BaseE == CurrentE)
return false;
if (Type ReceiverTy = BaseE->getType()) {
if (auto LVT = ReceiverTy->getAs<LValueType>())
ReceiverTy = LVT->getObjectType();
else if (auto MetaT = ReceiverTy->getAs<MetatypeType>())
ReceiverTy = MetaT->getInstanceType();
if (auto TyD = ReceiverTy->getAnyNominal()) {
StringRef unused;
if (getNameAndUSR(TyD, unused, Info.receiverUSR))
return true;
if (isDynamicCall(BaseE, D))
Info.roles |= (unsigned)SymbolRole::Dynamic;
}
}
return false;
}
llvm::hash_code
IndexSwiftASTWalker::hashFileReference(llvm::hash_code code,
SourceFileOrModule SFOrMod) {
StringRef Filename = SFOrMod.getFilename();
if (Filename.empty())
return code;
// FIXME: FileManager for swift ?
llvm::sys::fs::file_status Status;
if (std::error_code Ret = llvm::sys::fs::status(Filename, Status)) {
// Failure to read the file, just use filename to recover.
warn([&](llvm::raw_ostream &OS) {
OS << "failed to stat file: " << Filename << " (" << Ret.message() << ')';
});
return hash_combine(code, Filename);
}
// Don't use inode because it can easily change when you update the repository
// even though the file is supposed to be the same (same size/time).
code = hash_combine(code, Filename);
return hash_combine(code, Status.getSize(),
Status.getLastModificationTime().toEpochTime());
}
llvm::hash_code IndexSwiftASTWalker::hashModule(llvm::hash_code code,
SourceFileOrModule SFOrMod) {
code = hashFileReference(code, SFOrMod);
SmallVector<Module *, 16> Imports;
getRecursiveModuleImports(SFOrMod.getModule(), Imports);
for (auto Import : Imports)
code = hashFileReference(code, *Import);
return code;
}
void IndexSwiftASTWalker::getRecursiveModuleImports(
Module &Mod, SmallVectorImpl<Module *> &Imports) {
auto It = ImportsMap.find(&Mod);
if (It != ImportsMap.end()) {
Imports.append(It->second.begin(), It->second.end());
return;
}
llvm::SmallPtrSet<Module *, 16> Visited;
collectRecursiveModuleImports(Mod, Visited);
Visited.erase(&Mod);
warn([&Imports](llvm::raw_ostream &OS) {
std::for_each(Imports.begin(), Imports.end(), [&OS](Module *M) {
if (M->getModuleFilename().empty()) {
std::string Info = "swift::Module with empty file name!! \nDetails: \n";
Info += " name: ";
Info += M->getName().get();
Info += "\n";
auto Files = M->getFiles();
std::for_each(Files.begin(), Files.end(), [&](FileUnit *FU) {
Info += " file unit: ";
switch (FU->getKind()) {
case FileUnitKind::Builtin:
Info += "builtin";
break;
case FileUnitKind::Derived:
Info += "derived";
break;
case FileUnitKind::Source:
Info += "source, file=\"";
Info += cast<SourceFile>(FU)->getFilename();
Info += "\"";
break;
case FileUnitKind::SerializedAST:
Info += "serialized ast, file=\"";
Info += cast<LoadedFile>(FU)->getFilename();
Info += "\"";
break;
case FileUnitKind::ClangModule:
Info += "clang module, file=\"";
Info += cast<LoadedFile>(FU)->getFilename();
Info += "\"";
}
Info += "\n";
});
OS << "swift::Module with empty file name! " << Info << "\n";
}
});
});
Imports.append(Visited.begin(), Visited.end());
std::sort(Imports.begin(), Imports.end(), [](Module *LHS, Module *RHS) {
return LHS->getModuleFilename() < RHS->getModuleFilename();