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Rafael Espindola
6304e94108
This makes the buffer ownership on error conditions very natural. The buffer is only moved out of the argument if an object is constructed that now owns the buffer. llvm-svn: 211546
91 lines
3.2 KiB
C++
91 lines
3.2 KiB
C++
//===- ObjectFile.cpp - File format independent object file -----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines a file format independent ObjectFile class.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/raw_ostream.h"
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#include <system_error>
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using namespace llvm;
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using namespace object;
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void ObjectFile::anchor() { }
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ObjectFile::ObjectFile(unsigned int Type, MemoryBuffer *Source)
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: SymbolicFile(Type, Source) {}
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std::error_code ObjectFile::printSymbolName(raw_ostream &OS,
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DataRefImpl Symb) const {
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StringRef Name;
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if (std::error_code EC = getSymbolName(Symb, Name))
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return EC;
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OS << Name;
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return object_error::success;
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}
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std::error_code ObjectFile::getSymbolAlignment(DataRefImpl DRI,
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uint32_t &Result) const {
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Result = 0;
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return object_error::success;
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}
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section_iterator ObjectFile::getRelocatedSection(DataRefImpl Sec) const {
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return section_iterator(SectionRef(Sec, this));
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}
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ErrorOr<ObjectFile *>
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ObjectFile::createObjectFile(std::unique_ptr<MemoryBuffer> &Object,
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sys::fs::file_magic Type) {
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if (Type == sys::fs::file_magic::unknown)
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Type = sys::fs::identify_magic(Object->getBuffer());
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switch (Type) {
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case sys::fs::file_magic::unknown:
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case sys::fs::file_magic::bitcode:
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case sys::fs::file_magic::archive:
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case sys::fs::file_magic::macho_universal_binary:
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case sys::fs::file_magic::windows_resource:
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return object_error::invalid_file_type;
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case sys::fs::file_magic::elf_relocatable:
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case sys::fs::file_magic::elf_executable:
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case sys::fs::file_magic::elf_shared_object:
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case sys::fs::file_magic::elf_core:
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return createELFObjectFile(Object);
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case sys::fs::file_magic::macho_object:
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case sys::fs::file_magic::macho_executable:
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case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib:
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case sys::fs::file_magic::macho_core:
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case sys::fs::file_magic::macho_preload_executable:
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case sys::fs::file_magic::macho_dynamically_linked_shared_lib:
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case sys::fs::file_magic::macho_dynamic_linker:
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case sys::fs::file_magic::macho_bundle:
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case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub:
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case sys::fs::file_magic::macho_dsym_companion:
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return createMachOObjectFile(Object);
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case sys::fs::file_magic::coff_object:
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case sys::fs::file_magic::coff_import_library:
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case sys::fs::file_magic::pecoff_executable:
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return createCOFFObjectFile(Object.release());
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}
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llvm_unreachable("Unexpected Object File Type");
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}
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ErrorOr<ObjectFile *> ObjectFile::createObjectFile(StringRef ObjectPath) {
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std::unique_ptr<MemoryBuffer> File;
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if (std::error_code EC = MemoryBuffer::getFile(ObjectPath, File))
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return EC;
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return createObjectFile(File);
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}
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