SymbolicFile.cpp
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//===- SymbolicFile.cpp - Interface that only provides symbols ------------===//
//
// 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 a file format independent SymbolicFile class.
//
//===----------------------------------------------------------------------===//
#include "llvm/Object/SymbolicFile.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/BinaryFormat/Magic.h"
#include "llvm/Object/COFFImportFile.h"
#include "llvm/Object/Error.h"
#include "llvm/Object/IRObjectFile.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include <algorithm>
#include <memory>
using namespace llvm;
using namespace object;
SymbolicFile::SymbolicFile(unsigned int Type, MemoryBufferRef Source)
: Binary(Type, Source) {}
SymbolicFile::~SymbolicFile() = default;
Expected<std::unique_ptr<SymbolicFile>>
SymbolicFile::createSymbolicFile(MemoryBufferRef Object, file_magic Type,
LLVMContext *Context) {
StringRef Data = Object.getBuffer();
if (Type == file_magic::unknown)
Type = identify_magic(Data);
if (!isSymbolicFile(Type, Context))
return errorCodeToError(object_error::invalid_file_type);
switch (Type) {
case file_magic::bitcode:
// Context is guaranteed to be non-null here, because bitcode magic only
// indicates a symbolic file when Context is non-null.
return IRObjectFile::create(Object, *Context);
case file_magic::elf:
case file_magic::elf_executable:
case file_magic::elf_shared_object:
case file_magic::elf_core:
case file_magic::macho_executable:
case file_magic::macho_fixed_virtual_memory_shared_lib:
case file_magic::macho_core:
case file_magic::macho_preload_executable:
case file_magic::macho_dynamically_linked_shared_lib:
case file_magic::macho_dynamic_linker:
case file_magic::macho_bundle:
case file_magic::macho_dynamically_linked_shared_lib_stub:
case file_magic::macho_dsym_companion:
case file_magic::macho_kext_bundle:
case file_magic::pecoff_executable:
case file_magic::xcoff_object_32:
case file_magic::xcoff_object_64:
case file_magic::wasm_object:
return ObjectFile::createObjectFile(Object, Type);
case file_magic::coff_import_library:
return std::unique_ptr<SymbolicFile>(new COFFImportFile(Object));
case file_magic::elf_relocatable:
case file_magic::macho_object:
case file_magic::coff_object: {
Expected<std::unique_ptr<ObjectFile>> Obj =
ObjectFile::createObjectFile(Object, Type);
if (!Obj || !Context)
return std::move(Obj);
Expected<MemoryBufferRef> BCData =
IRObjectFile::findBitcodeInObject(*Obj->get());
if (!BCData) {
consumeError(BCData.takeError());
return std::move(Obj);
}
return IRObjectFile::create(
MemoryBufferRef(BCData->getBuffer(), Object.getBufferIdentifier()),
*Context);
}
default:
llvm_unreachable("Unexpected Binary File Type");
}
}
bool SymbolicFile::isSymbolicFile(file_magic Type, const LLVMContext *Context) {
switch (Type) {
case file_magic::bitcode:
return Context != nullptr;
case file_magic::elf:
case file_magic::elf_executable:
case file_magic::elf_shared_object:
case file_magic::elf_core:
case file_magic::macho_executable:
case file_magic::macho_fixed_virtual_memory_shared_lib:
case file_magic::macho_core:
case file_magic::macho_preload_executable:
case file_magic::macho_dynamically_linked_shared_lib:
case file_magic::macho_dynamic_linker:
case file_magic::macho_bundle:
case file_magic::macho_dynamically_linked_shared_lib_stub:
case file_magic::macho_dsym_companion:
case file_magic::macho_kext_bundle:
case file_magic::pecoff_executable:
case file_magic::xcoff_object_32:
case file_magic::xcoff_object_64:
case file_magic::wasm_object:
case file_magic::coff_import_library:
case file_magic::elf_relocatable:
case file_magic::macho_object:
case file_magic::coff_object:
return true;
default:
return false;
}
}