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-rw-r--r--contrib/llvm/lib/Object/IRObjectFile.cpp313
1 files changed, 313 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Object/IRObjectFile.cpp b/contrib/llvm/lib/Object/IRObjectFile.cpp
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+++ b/contrib/llvm/lib/Object/IRObjectFile.cpp
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+//===- IRObjectFile.cpp - IR object file implementation ---------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Part of the IRObjectFile class implementation.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Object/IRObjectFile.h"
+#include "RecordStreamer.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/IR/GVMaterializer.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Mangler.h"
+#include "llvm/IR/Module.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/MCParser/MCAsmParser.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/MC/MCTargetAsmParser.h"
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+using namespace object;
+
+IRObjectFile::IRObjectFile(MemoryBufferRef Object, std::unique_ptr<Module> Mod)
+ : SymbolicFile(Binary::ID_IR, Object), M(std::move(Mod)) {
+ Mang.reset(new Mangler());
+
+ const std::string &InlineAsm = M->getModuleInlineAsm();
+ if (InlineAsm.empty())
+ return;
+
+ Triple TT(M->getTargetTriple());
+ std::string Err;
+ const Target *T = TargetRegistry::lookupTarget(TT.str(), Err);
+ if (!T)
+ return;
+
+ std::unique_ptr<MCRegisterInfo> MRI(T->createMCRegInfo(TT.str()));
+ if (!MRI)
+ return;
+
+ std::unique_ptr<MCAsmInfo> MAI(T->createMCAsmInfo(*MRI, TT.str()));
+ if (!MAI)
+ return;
+
+ std::unique_ptr<MCSubtargetInfo> STI(
+ T->createMCSubtargetInfo(TT.str(), "", ""));
+ if (!STI)
+ return;
+
+ std::unique_ptr<MCInstrInfo> MCII(T->createMCInstrInfo());
+ if (!MCII)
+ return;
+
+ MCObjectFileInfo MOFI;
+ MCContext MCCtx(MAI.get(), MRI.get(), &MOFI);
+ MOFI.InitMCObjectFileInfo(TT, Reloc::Default, CodeModel::Default, MCCtx);
+ std::unique_ptr<RecordStreamer> Streamer(new RecordStreamer(MCCtx));
+ T->createNullTargetStreamer(*Streamer);
+
+ std::unique_ptr<MemoryBuffer> Buffer(MemoryBuffer::getMemBuffer(InlineAsm));
+ SourceMgr SrcMgr;
+ SrcMgr.AddNewSourceBuffer(std::move(Buffer), SMLoc());
+ std::unique_ptr<MCAsmParser> Parser(
+ createMCAsmParser(SrcMgr, MCCtx, *Streamer, *MAI));
+
+ MCTargetOptions MCOptions;
+ std::unique_ptr<MCTargetAsmParser> TAP(
+ T->createMCAsmParser(*STI, *Parser, *MCII, MCOptions));
+ if (!TAP)
+ return;
+
+ Parser->setTargetParser(*TAP);
+ if (Parser->Run(false))
+ return;
+
+ for (auto &KV : *Streamer) {
+ StringRef Key = KV.first();
+ RecordStreamer::State Value = KV.second;
+ uint32_t Res = BasicSymbolRef::SF_None;
+ switch (Value) {
+ case RecordStreamer::NeverSeen:
+ llvm_unreachable("foo");
+ case RecordStreamer::DefinedGlobal:
+ Res |= BasicSymbolRef::SF_Global;
+ break;
+ case RecordStreamer::Defined:
+ break;
+ case RecordStreamer::Global:
+ case RecordStreamer::Used:
+ Res |= BasicSymbolRef::SF_Undefined;
+ Res |= BasicSymbolRef::SF_Global;
+ break;
+ }
+ AsmSymbols.push_back(
+ std::make_pair<std::string, uint32_t>(Key, std::move(Res)));
+ }
+}
+
+IRObjectFile::~IRObjectFile() {
+ }
+
+static GlobalValue *getGV(DataRefImpl &Symb) {
+ if ((Symb.p & 3) == 3)
+ return nullptr;
+
+ return reinterpret_cast<GlobalValue*>(Symb.p & ~uintptr_t(3));
+}
+
+static uintptr_t skipEmpty(Module::const_alias_iterator I, const Module &M) {
+ if (I == M.alias_end())
+ return 3;
+ const GlobalValue *GV = &*I;
+ return reinterpret_cast<uintptr_t>(GV) | 2;
+}
+
+static uintptr_t skipEmpty(Module::const_global_iterator I, const Module &M) {
+ if (I == M.global_end())
+ return skipEmpty(M.alias_begin(), M);
+ const GlobalValue *GV = &*I;
+ return reinterpret_cast<uintptr_t>(GV) | 1;
+}
+
+static uintptr_t skipEmpty(Module::const_iterator I, const Module &M) {
+ if (I == M.end())
+ return skipEmpty(M.global_begin(), M);
+ const GlobalValue *GV = &*I;
+ return reinterpret_cast<uintptr_t>(GV) | 0;
+}
+
+static unsigned getAsmSymIndex(DataRefImpl Symb) {
+ assert((Symb.p & uintptr_t(3)) == 3);
+ uintptr_t Index = Symb.p & ~uintptr_t(3);
+ Index >>= 2;
+ return Index;
+}
+
+void IRObjectFile::moveSymbolNext(DataRefImpl &Symb) const {
+ const GlobalValue *GV = getGV(Symb);
+ uintptr_t Res;
+
+ switch (Symb.p & 3) {
+ case 0: {
+ Module::const_iterator Iter(static_cast<const Function*>(GV));
+ ++Iter;
+ Res = skipEmpty(Iter, *M);
+ break;
+ }
+ case 1: {
+ Module::const_global_iterator Iter(static_cast<const GlobalVariable*>(GV));
+ ++Iter;
+ Res = skipEmpty(Iter, *M);
+ break;
+ }
+ case 2: {
+ Module::const_alias_iterator Iter(static_cast<const GlobalAlias*>(GV));
+ ++Iter;
+ Res = skipEmpty(Iter, *M);
+ break;
+ }
+ case 3: {
+ unsigned Index = getAsmSymIndex(Symb);
+ assert(Index < AsmSymbols.size());
+ ++Index;
+ Res = (Index << 2) | 3;
+ break;
+ }
+ default:
+ llvm_unreachable("unreachable case");
+ }
+
+ Symb.p = Res;
+}
+
+std::error_code IRObjectFile::printSymbolName(raw_ostream &OS,
+ DataRefImpl Symb) const {
+ const GlobalValue *GV = getGV(Symb);
+ if (!GV) {
+ unsigned Index = getAsmSymIndex(Symb);
+ assert(Index <= AsmSymbols.size());
+ OS << AsmSymbols[Index].first;
+ return std::error_code();
+ }
+
+ if (GV->hasDLLImportStorageClass())
+ OS << "__imp_";
+
+ if (Mang)
+ Mang->getNameWithPrefix(OS, GV, false);
+ else
+ OS << GV->getName();
+
+ return std::error_code();
+}
+
+uint32_t IRObjectFile::getSymbolFlags(DataRefImpl Symb) const {
+ const GlobalValue *GV = getGV(Symb);
+
+ if (!GV) {
+ unsigned Index = getAsmSymIndex(Symb);
+ assert(Index <= AsmSymbols.size());
+ return AsmSymbols[Index].second;
+ }
+
+ uint32_t Res = BasicSymbolRef::SF_None;
+ if (GV->isDeclarationForLinker())
+ Res |= BasicSymbolRef::SF_Undefined;
+ if (GV->hasPrivateLinkage())
+ Res |= BasicSymbolRef::SF_FormatSpecific;
+ if (!GV->hasLocalLinkage())
+ Res |= BasicSymbolRef::SF_Global;
+ if (GV->hasCommonLinkage())
+ Res |= BasicSymbolRef::SF_Common;
+ if (GV->hasLinkOnceLinkage() || GV->hasWeakLinkage())
+ Res |= BasicSymbolRef::SF_Weak;
+
+ if (GV->getName().startswith("llvm."))
+ Res |= BasicSymbolRef::SF_FormatSpecific;
+ else if (auto *Var = dyn_cast<GlobalVariable>(GV)) {
+ if (Var->getSection() == StringRef("llvm.metadata"))
+ Res |= BasicSymbolRef::SF_FormatSpecific;
+ }
+
+ return Res;
+}
+
+GlobalValue *IRObjectFile::getSymbolGV(DataRefImpl Symb) { return getGV(Symb); }
+
+std::unique_ptr<Module> IRObjectFile::takeModule() { return std::move(M); }
+
+basic_symbol_iterator IRObjectFile::symbol_begin_impl() const {
+ Module::const_iterator I = M->begin();
+ DataRefImpl Ret;
+ Ret.p = skipEmpty(I, *M);
+ return basic_symbol_iterator(BasicSymbolRef(Ret, this));
+}
+
+basic_symbol_iterator IRObjectFile::symbol_end_impl() const {
+ DataRefImpl Ret;
+ uint64_t NumAsm = AsmSymbols.size();
+ NumAsm <<= 2;
+ Ret.p = 3 | NumAsm;
+ return basic_symbol_iterator(BasicSymbolRef(Ret, this));
+}
+
+ErrorOr<MemoryBufferRef> IRObjectFile::findBitcodeInObject(const ObjectFile &Obj) {
+ for (const SectionRef &Sec : Obj.sections()) {
+ StringRef SecName;
+ if (std::error_code EC = Sec.getName(SecName))
+ return EC;
+ if (SecName == ".llvmbc") {
+ StringRef SecContents;
+ if (std::error_code EC = Sec.getContents(SecContents))
+ return EC;
+ return MemoryBufferRef(SecContents, Obj.getFileName());
+ }
+ }
+
+ return object_error::bitcode_section_not_found;
+}
+
+ErrorOr<MemoryBufferRef> IRObjectFile::findBitcodeInMemBuffer(MemoryBufferRef Object) {
+ sys::fs::file_magic Type = sys::fs::identify_magic(Object.getBuffer());
+ switch (Type) {
+ case sys::fs::file_magic::bitcode:
+ return Object;
+ case sys::fs::file_magic::elf_relocatable:
+ case sys::fs::file_magic::macho_object:
+ case sys::fs::file_magic::coff_object: {
+ ErrorOr<std::unique_ptr<ObjectFile>> ObjFile =
+ ObjectFile::createObjectFile(Object, Type);
+ if (!ObjFile)
+ return ObjFile.getError();
+ return findBitcodeInObject(*ObjFile->get());
+ }
+ default:
+ return object_error::invalid_file_type;
+ }
+}
+
+ErrorOr<std::unique_ptr<IRObjectFile>>
+llvm::object::IRObjectFile::create(MemoryBufferRef Object,
+ LLVMContext &Context) {
+ ErrorOr<MemoryBufferRef> BCOrErr = findBitcodeInMemBuffer(Object);
+ if (!BCOrErr)
+ return BCOrErr.getError();
+
+ std::unique_ptr<MemoryBuffer> Buff(
+ MemoryBuffer::getMemBuffer(BCOrErr.get(), false));
+
+ ErrorOr<std::unique_ptr<Module>> MOrErr =
+ getLazyBitcodeModule(std::move(Buff), Context, nullptr,
+ /*ShouldLazyLoadMetadata*/ true);
+ if (std::error_code EC = MOrErr.getError())
+ return EC;
+
+ std::unique_ptr<Module> &M = MOrErr.get();
+ return llvm::make_unique<IRObjectFile>(Object, std::move(M));
+}
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