103 lines
3.4 KiB
C++
103 lines
3.4 KiB
C++
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//===- Symbol.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 Symbol.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/TextAPI/Symbol.h"
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#include <string>
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namespace llvm {
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namespace MachO {
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#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
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LLVM_DUMP_METHOD void Symbol::dump(raw_ostream &OS) const {
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std::string Result;
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if (isUndefined())
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Result += "(undef) ";
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if (isWeakDefined())
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Result += "(weak-def) ";
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if (isWeakReferenced())
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Result += "(weak-ref) ";
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if (isThreadLocalValue())
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Result += "(tlv) ";
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switch (Kind) {
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case SymbolKind::GlobalSymbol:
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Result += Name.str();
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break;
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case SymbolKind::ObjectiveCClass:
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Result += "(ObjC Class) " + Name.str();
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break;
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case SymbolKind::ObjectiveCClassEHType:
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Result += "(ObjC Class EH) " + Name.str();
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break;
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case SymbolKind::ObjectiveCInstanceVariable:
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Result += "(ObjC IVar) " + Name.str();
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break;
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}
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OS << Result;
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}
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#endif
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Symbol::const_filtered_target_range
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Symbol::targets(ArchitectureSet Architectures) const {
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std::function<bool(const Target &)> FN =
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[Architectures](const Target &Target) {
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return Architectures.has(Target.Arch);
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};
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return make_filter_range(Targets, FN);
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}
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bool Symbol::operator==(const Symbol &O) const {
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// Older Tapi files do not express all these symbol flags. In those
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// cases, ignore those differences.
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auto RemoveFlag = [](const Symbol &Sym, SymbolFlags &Flag) {
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if (Sym.isData())
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Flag &= ~SymbolFlags::Data;
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if (Sym.isText())
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Flag &= ~SymbolFlags::Text;
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};
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SymbolFlags LHSFlags = Flags;
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SymbolFlags RHSFlags = O.Flags;
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// Ignore Text and Data for now.
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RemoveFlag(*this, LHSFlags);
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RemoveFlag(O, RHSFlags);
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return std::tie(Name, Kind, Targets, LHSFlags) ==
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std::tie(O.Name, O.Kind, O.Targets, RHSFlags);
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}
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SimpleSymbol parseSymbol(StringRef SymName, const SymbolFlags Flags) {
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if (SymName.starts_with(ObjC1ClassNamePrefix))
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return {SymName.drop_front(ObjC1ClassNamePrefix.size()),
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SymbolKind::ObjectiveCClass};
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if (SymName.starts_with(ObjC2ClassNamePrefix))
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return {SymName.drop_front(ObjC2ClassNamePrefix.size()),
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SymbolKind::ObjectiveCClass};
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if (SymName.starts_with(ObjC2MetaClassNamePrefix))
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return {SymName.drop_front(ObjC2MetaClassNamePrefix.size()),
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SymbolKind::ObjectiveCClass};
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if (SymName.starts_with(ObjC2EHTypePrefix)) {
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// When classes without ehtype are used in try/catch blocks
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// a weak-defined symbol is exported. In those cases, treat these as a
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// global instead.
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if ((Flags & SymbolFlags::WeakDefined) == SymbolFlags::WeakDefined)
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return {SymName, SymbolKind::GlobalSymbol};
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return {SymName.drop_front(ObjC2EHTypePrefix.size()),
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SymbolKind::ObjectiveCClassEHType};
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}
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if (SymName.starts_with(ObjC2IVarPrefix))
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return {SymName.drop_front(ObjC2IVarPrefix.size()),
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SymbolKind::ObjectiveCInstanceVariable};
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return {SymName, SymbolKind::GlobalSymbol};
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}
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} // end namespace MachO.
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} // end namespace llvm.
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