SymbolicFile.cpp revision 360784 
1//===- SymbolicFile.cpp - Interface that only provides symbols ------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file defines a file format independent SymbolicFile class.
10//
11//===----------------------------------------------------------------------===//
12
13#include "llvm/Object/SymbolicFile.h"
14#include "llvm/ADT/StringRef.h"
15#include "llvm/BinaryFormat/Magic.h"
16#include "llvm/Object/COFFImportFile.h"
17#include "llvm/Object/Error.h"
18#include "llvm/Object/IRObjectFile.h"
19#include "llvm/Object/ObjectFile.h"
20#include "llvm/Support/Compiler.h"
21#include "llvm/Support/Error.h"
22#include "llvm/Support/ErrorHandling.h"
23#include "llvm/Support/ErrorOr.h"
24#include "llvm/Support/FileSystem.h"
25#include "llvm/Support/MemoryBuffer.h"
26#include <algorithm>
27#include <memory>
28
29using namespace llvm;
30using namespace object;
31
32SymbolicFile::SymbolicFile(unsigned int Type, MemoryBufferRef Source)
33    : Binary(Type, Source) {}
34
35SymbolicFile::~SymbolicFile() = default;
36
37Expected<std::unique_ptr<SymbolicFile>>
38SymbolicFile::createSymbolicFile(MemoryBufferRef Object, file_magic Type,
39                                 LLVMContext *Context) {
40  StringRef Data = Object.getBuffer();
41  if (Type == file_magic::unknown)
42    Type = identify_magic(Data);
43
44  switch (Type) {
45  case file_magic::bitcode:
46    if (Context)
47      return IRObjectFile::create(Object, *Context);
48    LLVM_FALLTHROUGH;
49  case file_magic::unknown:
50  case file_magic::archive:
51  case file_magic::coff_cl_gl_object:
52  case file_magic::macho_universal_binary:
53  case file_magic::windows_resource:
54  case file_magic::pdb:
55  case file_magic::minidump:
56  case file_magic::tapi_file:
57    return errorCodeToError(object_error::invalid_file_type);
58  case file_magic::elf:
59  case file_magic::elf_executable:
60  case file_magic::elf_shared_object:
61  case file_magic::elf_core:
62  case file_magic::macho_executable:
63  case file_magic::macho_fixed_virtual_memory_shared_lib:
64  case file_magic::macho_core:
65  case file_magic::macho_preload_executable:
66  case file_magic::macho_dynamically_linked_shared_lib:
67  case file_magic::macho_dynamic_linker:
68  case file_magic::macho_bundle:
69  case file_magic::macho_dynamically_linked_shared_lib_stub:
70  case file_magic::macho_dsym_companion:
71  case file_magic::macho_kext_bundle:
72  case file_magic::pecoff_executable:
73  case file_magic::xcoff_object_32:
74  case file_magic::xcoff_object_64:
75  case file_magic::wasm_object:
76    return ObjectFile::createObjectFile(Object, Type);
77  case file_magic::coff_import_library:
78    return std::unique_ptr<SymbolicFile>(new COFFImportFile(Object));
79  case file_magic::elf_relocatable:
80  case file_magic::macho_object:
81  case file_magic::coff_object: {
82    Expected<std::unique_ptr<ObjectFile>> Obj =
83        ObjectFile::createObjectFile(Object, Type);
84    if (!Obj || !Context)
85      return std::move(Obj);
86
87    Expected<MemoryBufferRef> BCData =
88        IRObjectFile::findBitcodeInObject(*Obj->get());
89    if (!BCData) {
90      consumeError(BCData.takeError());
91      return std::move(Obj);
92    }
93
94    return IRObjectFile::create(
95        MemoryBufferRef(BCData->getBuffer(), Object.getBufferIdentifier()),
96        *Context);
97  }
98  }
99  llvm_unreachable("Unexpected Binary File Type");
100}
101