103 lines
3.5 KiB
C++
103 lines
3.5 KiB
C++
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//===- TapiFile.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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// This file defines the Text-based Dynamcic Library Stub format.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Object/TapiFile.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Object/Error.h"
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#include "llvm/Support/MemoryBuffer.h"
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using namespace llvm;
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using namespace MachO;
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using namespace object;
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static constexpr StringLiteral ObjC1ClassNamePrefix = ".objc_class_name_";
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static constexpr StringLiteral ObjC2ClassNamePrefix = "_OBJC_CLASS_$_";
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static constexpr StringLiteral ObjC2MetaClassNamePrefix = "_OBJC_METACLASS_$_";
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static constexpr StringLiteral ObjC2EHTypePrefix = "_OBJC_EHTYPE_$_";
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static constexpr StringLiteral ObjC2IVarPrefix = "_OBJC_IVAR_$_";
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static uint32_t getFlags(const Symbol *Sym) {
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uint32_t Flags = BasicSymbolRef::SF_Global;
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if (Sym->isUndefined())
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Flags |= BasicSymbolRef::SF_Undefined;
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else
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Flags |= BasicSymbolRef::SF_Exported;
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if (Sym->isWeakDefined() || Sym->isWeakReferenced())
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Flags |= BasicSymbolRef::SF_Weak;
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return Flags;
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}
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TapiFile::TapiFile(MemoryBufferRef Source, const InterfaceFile &interface,
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Architecture Arch)
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: SymbolicFile(ID_TapiFile, Source), Arch(Arch) {
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for (const auto *Symbol : interface.symbols()) {
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if (!Symbol->getArchitectures().has(Arch))
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continue;
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switch (Symbol->getKind()) {
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case SymbolKind::GlobalSymbol:
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Symbols.emplace_back(StringRef(), Symbol->getName(), getFlags(Symbol));
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break;
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case SymbolKind::ObjectiveCClass:
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if (interface.getPlatforms().count(PlatformKind::macOS) &&
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Arch == AK_i386) {
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Symbols.emplace_back(ObjC1ClassNamePrefix, Symbol->getName(),
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getFlags(Symbol));
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} else {
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Symbols.emplace_back(ObjC2ClassNamePrefix, Symbol->getName(),
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getFlags(Symbol));
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Symbols.emplace_back(ObjC2MetaClassNamePrefix, Symbol->getName(),
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getFlags(Symbol));
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}
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break;
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case SymbolKind::ObjectiveCClassEHType:
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Symbols.emplace_back(ObjC2EHTypePrefix, Symbol->getName(),
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getFlags(Symbol));
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break;
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case SymbolKind::ObjectiveCInstanceVariable:
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Symbols.emplace_back(ObjC2IVarPrefix, Symbol->getName(),
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getFlags(Symbol));
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break;
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}
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}
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}
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TapiFile::~TapiFile() = default;
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void TapiFile::moveSymbolNext(DataRefImpl &DRI) const { DRI.d.a++; }
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Error TapiFile::printSymbolName(raw_ostream &OS, DataRefImpl DRI) const {
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assert(DRI.d.a < Symbols.size() && "Attempt to access symbol out of bounds");
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const Symbol &Sym = Symbols[DRI.d.a];
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OS << Sym.Prefix << Sym.Name;
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return Error::success();
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}
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Expected<uint32_t> TapiFile::getSymbolFlags(DataRefImpl DRI) const {
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assert(DRI.d.a < Symbols.size() && "Attempt to access symbol out of bounds");
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return Symbols[DRI.d.a].Flags;
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}
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basic_symbol_iterator TapiFile::symbol_begin() const {
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DataRefImpl DRI;
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DRI.d.a = 0;
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return BasicSymbolRef{DRI, this};
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}
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basic_symbol_iterator TapiFile::symbol_end() const {
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DataRefImpl DRI;
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DRI.d.a = Symbols.size();
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return BasicSymbolRef{DRI, this};
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}
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