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//===- TapiFile.cpp -------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines the Text-based Dynamcic Library Stub format.
//
//===----------------------------------------------------------------------===//
#include "llvm/Object/TapiFile.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Object/Error.h"
#include "llvm/Support/MemoryBuffer.h"
using namespace llvm;
using namespace MachO;
using namespace object;
static constexpr StringLiteral ObjC1ClassNamePrefix = ".objc_class_name_";
static constexpr StringLiteral ObjC2ClassNamePrefix = "_OBJC_CLASS_$_";
static constexpr StringLiteral ObjC2MetaClassNamePrefix = "_OBJC_METACLASS_$_";
static constexpr StringLiteral ObjC2EHTypePrefix = "_OBJC_EHTYPE_$_";
static constexpr StringLiteral ObjC2IVarPrefix = "_OBJC_IVAR_$_";
static uint32_t getFlags(const Symbol *Sym) {
uint32_t Flags = BasicSymbolRef::SF_Global;
if (Sym->isUndefined())
Flags |= BasicSymbolRef::SF_Undefined;
else
Flags |= BasicSymbolRef::SF_Exported;
if (Sym->isWeakDefined() || Sym->isWeakReferenced())
Flags |= BasicSymbolRef::SF_Weak;
return Flags;
}
TapiFile::TapiFile(MemoryBufferRef Source, const InterfaceFile &interface,
Architecture Arch)
: SymbolicFile(ID_TapiFile, Source), Arch(Arch) {
for (const auto *Symbol : interface.symbols()) {
if (!Symbol->getArchitectures().has(Arch))
continue;
switch (Symbol->getKind()) {
case SymbolKind::GlobalSymbol:
Symbols.emplace_back(StringRef(), Symbol->getName(), getFlags(Symbol));
break;
case SymbolKind::ObjectiveCClass:
if (interface.getPlatforms().count(PlatformKind::macOS) &&
Arch == AK_i386) {
Symbols.emplace_back(ObjC1ClassNamePrefix, Symbol->getName(),
getFlags(Symbol));
} else {
Symbols.emplace_back(ObjC2ClassNamePrefix, Symbol->getName(),
getFlags(Symbol));
Symbols.emplace_back(ObjC2MetaClassNamePrefix, Symbol->getName(),
getFlags(Symbol));
}
break;
case SymbolKind::ObjectiveCClassEHType:
Symbols.emplace_back(ObjC2EHTypePrefix, Symbol->getName(),
getFlags(Symbol));
break;
case SymbolKind::ObjectiveCInstanceVariable:
Symbols.emplace_back(ObjC2IVarPrefix, Symbol->getName(),
getFlags(Symbol));
break;
}
}
}
TapiFile::~TapiFile() = default;
void TapiFile::moveSymbolNext(DataRefImpl &DRI) const { DRI.d.a++; }
Error TapiFile::printSymbolName(raw_ostream &OS, DataRefImpl DRI) const {
assert(DRI.d.a < Symbols.size() && "Attempt to access symbol out of bounds");
const Symbol &Sym = Symbols[DRI.d.a];
OS << Sym.Prefix << Sym.Name;
return Error::success();
}
Expected<uint32_t> TapiFile::getSymbolFlags(DataRefImpl DRI) const {
assert(DRI.d.a < Symbols.size() && "Attempt to access symbol out of bounds");
return Symbols[DRI.d.a].Flags;
}
basic_symbol_iterator TapiFile::symbol_begin() const {
DataRefImpl DRI;
DRI.d.a = 0;
return BasicSymbolRef{DRI, this};
}
basic_symbol_iterator TapiFile::symbol_end() const {
DataRefImpl DRI;
DRI.d.a = Symbols.size();
return BasicSymbolRef{DRI, this};
}
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