xref: /llvm-project/llvm/lib/Object/SymbolicFile.cpp (revision e97c34cb60775b29e887de9ca2495c7dee5d627c)
1 //===- SymbolicFile.cpp - Interface that only provides symbols --*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file defines a file format independent SymbolicFile class.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "llvm/Object/COFF.h"
15 #include "llvm/Object/COFFImportFile.h"
16 #include "llvm/Object/IRObjectFile.h"
17 #include "llvm/Object/ObjectFile.h"
18 #include "llvm/Object/SymbolicFile.h"
19 #include "llvm/Support/MemoryBuffer.h"
20 
21 using namespace llvm;
22 using namespace object;
23 
24 SymbolicFile::SymbolicFile(unsigned int Type, MemoryBufferRef Source)
25     : Binary(Type, Source) {}
26 
27 SymbolicFile::~SymbolicFile() {}
28 
29 Expected<std::unique_ptr<SymbolicFile>> SymbolicFile::createSymbolicFile(
30     MemoryBufferRef Object, sys::fs::file_magic Type, LLVMContext *Context) {
31   StringRef Data = Object.getBuffer();
32   if (Type == sys::fs::file_magic::unknown)
33     Type = sys::fs::identify_magic(Data);
34 
35   switch (Type) {
36   case sys::fs::file_magic::bitcode:
37     if (Context)
38       return IRObjectFile::create(Object, *Context);
39     LLVM_FALLTHROUGH;
40   case sys::fs::file_magic::unknown:
41   case sys::fs::file_magic::archive:
42   case sys::fs::file_magic::coff_cl_gl_object:
43   case sys::fs::file_magic::macho_universal_binary:
44   case sys::fs::file_magic::windows_resource:
45     return errorCodeToError(object_error::invalid_file_type);
46   case sys::fs::file_magic::elf:
47   case sys::fs::file_magic::elf_executable:
48   case sys::fs::file_magic::elf_shared_object:
49   case sys::fs::file_magic::elf_core:
50   case sys::fs::file_magic::macho_executable:
51   case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib:
52   case sys::fs::file_magic::macho_core:
53   case sys::fs::file_magic::macho_preload_executable:
54   case sys::fs::file_magic::macho_dynamically_linked_shared_lib:
55   case sys::fs::file_magic::macho_dynamic_linker:
56   case sys::fs::file_magic::macho_bundle:
57   case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub:
58   case sys::fs::file_magic::macho_dsym_companion:
59   case sys::fs::file_magic::macho_kext_bundle:
60   case sys::fs::file_magic::pecoff_executable:
61     return ObjectFile::createObjectFile(Object, Type);
62   case sys::fs::file_magic::coff_import_library:
63     return std::unique_ptr<SymbolicFile>(new COFFImportFile(Object));
64   case sys::fs::file_magic::elf_relocatable:
65   case sys::fs::file_magic::macho_object:
66   case sys::fs::file_magic::coff_object: {
67     Expected<std::unique_ptr<ObjectFile>> Obj =
68         ObjectFile::createObjectFile(Object, Type);
69     if (!Obj || !Context)
70       return std::move(Obj);
71 
72     ErrorOr<MemoryBufferRef> BCData =
73         IRObjectFile::findBitcodeInObject(*Obj->get());
74     if (!BCData)
75       return std::move(Obj);
76 
77     return IRObjectFile::create(
78         MemoryBufferRef(BCData->getBuffer(), Object.getBufferIdentifier()),
79         *Context);
80   }
81   }
82   llvm_unreachable("Unexpected Binary File Type");
83 }
84