4460fa8814
ObjCInterfaceRecords roughly align to the objc-classes key in tbd-files. They condensely represent up to 3 symbols. The problem here is that when represented this way, we lose granularity when these symbols could have different linkages or outright don't exist. This can happen frequently in interoptable code generated by the swift compiler. This adds fields and utility functions to express unique properties for these symbols. If the record does represent the same properties across all of its symbols, it will be treated the same in the TBD. Otherwise it will be printed in global's section. Reviewed seperately before by Juergen Ributzka
93 lines
3.5 KiB
C++
93 lines
3.5 KiB
C++
//===- RecordVisitor.cpp --------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// Implements the TAPI Record Visitor.
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///
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//===----------------------------------------------------------------------===//
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#include "llvm/TextAPI/RecordVisitor.h"
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using namespace llvm;
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using namespace llvm::MachO;
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RecordVisitor::~RecordVisitor() {}
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void RecordVisitor::visitObjCInterface(const ObjCInterfaceRecord &) {}
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void RecordVisitor::visitObjCCategory(const ObjCCategoryRecord &) {}
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static bool shouldSkipRecord(const Record &R, const bool RecordUndefs) {
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if (R.isExported())
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return false;
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// Skip non exported symbols unless for flat namespace libraries.
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return !(RecordUndefs && R.isUndefined());
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}
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void SymbolConverter::visitGlobal(const GlobalRecord &GR) {
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auto [SymName, SymKind, InterfaceType] = parseSymbol(GR.getName());
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if (shouldSkipRecord(GR, RecordUndefs))
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return;
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Symbols->addGlobal(SymKind, SymName, GR.getFlags(), Targ);
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if (InterfaceType == ObjCIFSymbolKind::None) {
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Symbols->addGlobal(SymKind, SymName, GR.getFlags(), Targ);
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return;
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}
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// It is impossible to hold a complete ObjCInterface with a single
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// GlobalRecord, so continue to treat this symbol a generic global.
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Symbols->addGlobal(EncodeKind::GlobalSymbol, GR.getName(), GR.getFlags(),
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Targ);
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}
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void SymbolConverter::addIVars(const ArrayRef<ObjCIVarRecord *> IVars,
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StringRef ContainerName) {
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for (auto *IV : IVars) {
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if (shouldSkipRecord(*IV, RecordUndefs))
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continue;
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std::string Name =
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ObjCIVarRecord::createScopedName(ContainerName, IV->getName());
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Symbols->addGlobal(EncodeKind::ObjectiveCInstanceVariable, Name,
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IV->getFlags(), Targ);
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}
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}
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void SymbolConverter::visitObjCInterface(const ObjCInterfaceRecord &ObjCR) {
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if (!shouldSkipRecord(ObjCR, RecordUndefs)) {
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if (ObjCR.isCompleteInterface()) {
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Symbols->addGlobal(EncodeKind::ObjectiveCClass, ObjCR.getName(),
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ObjCR.getFlags(), Targ);
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if (ObjCR.hasExceptionAttribute())
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Symbols->addGlobal(EncodeKind::ObjectiveCClassEHType, ObjCR.getName(),
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ObjCR.getFlags(), Targ);
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} else {
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// Because there is not a complete interface, visit individual symbols
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// instead.
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if (ObjCR.isExportedSymbol(ObjCIFSymbolKind::EHType))
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Symbols->addGlobal(EncodeKind::GlobalSymbol,
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(ObjC2EHTypePrefix + ObjCR.getName()).str(),
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ObjCR.getFlags(), Targ);
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if (ObjCR.isExportedSymbol(ObjCIFSymbolKind::Class))
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Symbols->addGlobal(EncodeKind::GlobalSymbol,
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(ObjC2ClassNamePrefix + ObjCR.getName()).str(),
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ObjCR.getFlags(), Targ);
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if (ObjCR.isExportedSymbol(ObjCIFSymbolKind::MetaClass))
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Symbols->addGlobal(EncodeKind::GlobalSymbol,
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(ObjC2MetaClassNamePrefix + ObjCR.getName()).str(),
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ObjCR.getFlags(), Targ);
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}
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}
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addIVars(ObjCR.getObjCIVars(), ObjCR.getName());
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for (const auto *Cat : ObjCR.getObjCCategories())
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addIVars(Cat->getObjCIVars(), ObjCR.getName());
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}
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void SymbolConverter::visitObjCCategory(const ObjCCategoryRecord &Cat) {
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addIVars(Cat.getObjCIVars(), Cat.getName());
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}
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