lib/Object/SymbolicFile.cpp

   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
  29 using namespace llvm;
  30 using namespace object;
  31
  32 SymbolicFile::SymbolicFile(unsigned int Type, MemoryBufferRef Source)
  33     : Binary(Type, Source) {}
  34
  35 SymbolicFile::~SymbolicFile() = default;
  36
  37 Expected<std::unique_ptr<SymbolicFile>>
  38 SymbolicFile::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     return errorCodeToError(object_error::invalid_file_type);
  57   case file_magic::elf:
  58   case file_magic::elf_executable:
  59   case file_magic::elf_shared_object:
  60   case file_magic::elf_core:
  61   case file_magic::macho_executable:
  62   case file_magic::macho_fixed_virtual_memory_shared_lib:
  63   case file_magic::macho_core:
  64   case file_magic::macho_preload_executable:
  65   case file_magic::macho_dynamically_linked_shared_lib:
  66   case file_magic::macho_dynamic_linker:
  67   case file_magic::macho_bundle:
  68   case file_magic::macho_dynamically_linked_shared_lib_stub:
  69   case file_magic::macho_dsym_companion:
  70   case file_magic::macho_kext_bundle:
  71   case file_magic::pecoff_executable:
  72   case file_magic::xcoff_object_32:
  73   case file_magic::wasm_object:
  74     return ObjectFile::createObjectFile(Object, Type);
  75   case file_magic::coff_import_library:
  76     return std::unique_ptr<SymbolicFile>(new COFFImportFile(Object));
  77   case file_magic::elf_relocatable:
  78   case file_magic::macho_object:
  79   case file_magic::coff_object: {
  80     Expected<std::unique_ptr<ObjectFile>> Obj =
  81         ObjectFile::createObjectFile(Object, Type);
  82     if (!Obj || !Context)
  83       return std::move(Obj);
  84
  85     Expected<MemoryBufferRef> BCData =
  86         IRObjectFile::findBitcodeInObject(*Obj->get());
  87     if (!BCData) {
  88       consumeError(BCData.takeError());
  89       return std::move(Obj);
  90     }
  91
  92     return IRObjectFile::create(
  93         MemoryBufferRef(BCData->getBuffer(), Object.getBufferIdentifier()),
  94         *Context);
  95   }
  96   }
  97   llvm_unreachable("Unexpected Binary File Type");
  98 }