1 //===- IRObjectFile.cpp - IR object file implementation ---------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Part of the IRObjectFile class implementation.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Object/IRObjectFile.h"
15 #include "llvm/ADT/STLExtras.h"
16 #include "llvm/BinaryFormat/Magic.h"
17 #include "llvm/Bitcode/BitcodeReader.h"
18 #include "llvm/IR/GVMaterializer.h"
19 #include "llvm/IR/LLVMContext.h"
20 #include "llvm/IR/Mangler.h"
21 #include "llvm/IR/Module.h"
22 #include "llvm/Object/ObjectFile.h"
23 #include "llvm/Support/MemoryBuffer.h"
24 #include "llvm/Support/TargetRegistry.h"
25 #include "llvm/Support/raw_ostream.h"
27 using namespace object;
29 IRObjectFile::IRObjectFile(MemoryBufferRef Object,
30 std::vector<std::unique_ptr<Module>> Mods)
31 : SymbolicFile(Binary::ID_IR, Object), Mods(std::move(Mods)) {
32 for (auto &M : this->Mods)
33 SymTab.addModule(M.get());
36 IRObjectFile::~IRObjectFile() {}
38 static ModuleSymbolTable::Symbol getSym(DataRefImpl &Symb) {
39 return *reinterpret_cast<ModuleSymbolTable::Symbol *>(Symb.p);
42 void IRObjectFile::moveSymbolNext(DataRefImpl &Symb) const {
43 Symb.p += sizeof(ModuleSymbolTable::Symbol);
46 std::error_code IRObjectFile::printSymbolName(raw_ostream &OS,
47 DataRefImpl Symb) const {
48 SymTab.printSymbolName(OS, getSym(Symb));
49 return std::error_code();
52 uint32_t IRObjectFile::getSymbolFlags(DataRefImpl Symb) const {
53 return SymTab.getSymbolFlags(getSym(Symb));
56 basic_symbol_iterator IRObjectFile::symbol_begin() const {
58 Ret.p = reinterpret_cast<uintptr_t>(SymTab.symbols().data());
59 return basic_symbol_iterator(BasicSymbolRef(Ret, this));
62 basic_symbol_iterator IRObjectFile::symbol_end() const {
64 Ret.p = reinterpret_cast<uintptr_t>(SymTab.symbols().data() +
65 SymTab.symbols().size());
66 return basic_symbol_iterator(BasicSymbolRef(Ret, this));
69 StringRef IRObjectFile::getTargetTriple() const {
70 // Each module must have the same target triple, so we arbitrarily access the
72 return Mods[0]->getTargetTriple();
75 Expected<MemoryBufferRef>
76 IRObjectFile::findBitcodeInObject(const ObjectFile &Obj) {
77 for (const SectionRef &Sec : Obj.sections()) {
78 if (Sec.isBitcode()) {
79 StringRef SecContents;
80 if (std::error_code EC = Sec.getContents(SecContents))
81 return errorCodeToError(EC);
82 return MemoryBufferRef(SecContents, Obj.getFileName());
86 return errorCodeToError(object_error::bitcode_section_not_found);
89 Expected<MemoryBufferRef>
90 IRObjectFile::findBitcodeInMemBuffer(MemoryBufferRef Object) {
91 file_magic Type = identify_magic(Object.getBuffer());
93 case file_magic::bitcode:
95 case file_magic::elf_relocatable:
96 case file_magic::macho_object:
97 case file_magic::coff_object: {
98 Expected<std::unique_ptr<ObjectFile>> ObjFile =
99 ObjectFile::createObjectFile(Object, Type);
101 return ObjFile.takeError();
102 return findBitcodeInObject(*ObjFile->get());
105 return errorCodeToError(object_error::invalid_file_type);
109 Expected<std::unique_ptr<IRObjectFile>>
110 IRObjectFile::create(MemoryBufferRef Object, LLVMContext &Context) {
111 Expected<MemoryBufferRef> BCOrErr = findBitcodeInMemBuffer(Object);
113 return BCOrErr.takeError();
115 Expected<std::vector<BitcodeModule>> BMsOrErr =
116 getBitcodeModuleList(*BCOrErr);
118 return BMsOrErr.takeError();
120 std::vector<std::unique_ptr<Module>> Mods;
121 for (auto BM : *BMsOrErr) {
122 Expected<std::unique_ptr<Module>> MOrErr =
123 BM.getLazyModule(Context, /*ShouldLazyLoadMetadata*/ true,
124 /*IsImporting*/ false);
126 return MOrErr.takeError();
128 Mods.push_back(std::move(*MOrErr));
131 return std::unique_ptr<IRObjectFile>(
132 new IRObjectFile(*BCOrErr, std::move(Mods)));
135 Expected<IRSymtabFile> object::readIRSymtab(MemoryBufferRef MBRef) {
137 Expected<MemoryBufferRef> BCOrErr =
138 IRObjectFile::findBitcodeInMemBuffer(MBRef);
140 return BCOrErr.takeError();
142 Expected<BitcodeFileContents> BFCOrErr = getBitcodeFileContents(*BCOrErr);
144 return BFCOrErr.takeError();
146 Expected<irsymtab::FileContents> FCOrErr = irsymtab::readBitcode(*BFCOrErr);
148 return FCOrErr.takeError();
150 F.Mods = std::move(BFCOrErr->Mods);
151 F.Symtab = std::move(FCOrErr->Symtab);
152 F.Strtab = std::move(FCOrErr->Strtab);
153 F.TheReader = std::move(FCOrErr->TheReader);