| //===- 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/Bitcode/ReaderWriter.h" |
| #include "llvm/IR/LLVMContext.h" |
| #include "llvm/IR/Mangler.h" |
| #include "llvm/IR/Module.h" |
| #include "llvm/Object/IRObjectFile.h" |
| #include "llvm/Support/raw_ostream.h" |
| using namespace llvm; |
| using namespace object; |
| |
| IRObjectFile::IRObjectFile(MemoryBuffer *Object, error_code &EC, |
| LLVMContext &Context, bool BufferOwned) |
| : SymbolicFile(Binary::ID_IR, Object, BufferOwned) { |
| ErrorOr<Module*> MOrErr = parseBitcodeFile(Object, Context); |
| if ((EC = MOrErr.getError())) |
| return; |
| |
| M.reset(MOrErr.get()); |
| |
| // If we have a DataLayout, setup a mangler. |
| const DataLayout *DL = M->getDataLayout(); |
| if (!DL) |
| return; |
| |
| Mang.reset(new Mangler(DL)); |
| } |
| |
| static const GlobalValue &getGV(DataRefImpl &Symb) { |
| 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; |
| } |
| |
| void IRObjectFile::moveSymbolNext(DataRefImpl &Symb) const { |
| const GlobalValue *GV = &getGV(Symb); |
| const Module &M = *GV->getParent(); |
| 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: |
| llvm_unreachable("Invalid symbol reference"); |
| } |
| |
| Symb.p = Res; |
| } |
| |
| error_code IRObjectFile::printSymbolName(raw_ostream &OS, |
| DataRefImpl Symb) const { |
| const GlobalValue &GV = getGV(Symb); |
| |
| if (Mang) |
| Mang->getNameWithPrefix(OS, &GV, false); |
| else |
| OS << GV.getName(); |
| |
| return object_error::success; |
| } |
| |
| uint32_t IRObjectFile::getSymbolFlags(DataRefImpl Symb) const { |
| const GlobalValue &GV = getGV(Symb); |
| |
| uint32_t Res = BasicSymbolRef::SF_None; |
| if (GV.isDeclaration() || GV.hasAvailableExternallyLinkage()) |
| 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; |
| |
| return Res; |
| } |
| |
| const GlobalValue &IRObjectFile::getSymbolGV(DataRefImpl Symb) const { |
| const GlobalValue &GV = getGV(Symb); |
| return GV; |
| } |
| |
| 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; |
| Ret.p = 3; |
| return basic_symbol_iterator(BasicSymbolRef(Ret, this)); |
| } |
| |
| ErrorOr<SymbolicFile *> llvm::object::SymbolicFile::createIRObjectFile( |
| MemoryBuffer *Object, LLVMContext &Context, bool BufferOwned) { |
| error_code EC; |
| std::unique_ptr<IRObjectFile> Ret( |
| new IRObjectFile(Object, EC, Context, BufferOwned)); |
| if (EC) |
| return EC; |
| return Ret.release(); |
| } |