Home | History | Annotate | Download | only in Object 
      1 //===- SymbolicFile.cpp - Interface that only provides symbols ------------===//
      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/SymbolicFile.h"
     15 #include "llvm/ADT/StringRef.h"
     16 #include "llvm/BinaryFormat/Magic.h"
     17 #include "llvm/Object/COFFImportFile.h"
     18 #include "llvm/Object/Error.h"
     19 #include "llvm/Object/IRObjectFile.h"
     20 #include "llvm/Object/ObjectFile.h"
     21 #include "llvm/Support/Compiler.h"
     22 #include "llvm/Support/Error.h"
     23 #include "llvm/Support/ErrorHandling.h"
     24 #include "llvm/Support/ErrorOr.h"
     25 #include "llvm/Support/FileSystem.h"
     26 #include "llvm/Support/MemoryBuffer.h"
     27 #include <algorithm>
     28 #include <memory>
     29 
     30 using namespace llvm;
     31 using namespace object;
     32 
     33 SymbolicFile::SymbolicFile(unsigned int Type, MemoryBufferRef Source)
     34     : Binary(Type, Source) {}
     35 
     36 SymbolicFile::~SymbolicFile() = default;
     37 
     38 Expected<std::unique_ptr<SymbolicFile>>
     39 SymbolicFile::createSymbolicFile(MemoryBufferRef Object, file_magic Type,
     40                                  LLVMContext *Context) {
     41   StringRef Data = Object.getBuffer();
     42   if (Type == file_magic::unknown)
     43     Type = identify_magic(Data);
     44 
     45   switch (Type) {
     46   case file_magic::bitcode:
     47     if (Context)
     48       return IRObjectFile::create(Object, *Context);
     49     LLVM_FALLTHROUGH;
     50   case file_magic::unknown:
     51   case file_magic::archive:
     52   case file_magic::coff_cl_gl_object:
     53   case file_magic::macho_universal_binary:
     54   case file_magic::windows_resource:
     55   case file_magic::pdb:
     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::wasm_object:
     73     return ObjectFile::createObjectFile(Object, Type);
     74   case file_magic::coff_import_library:
     75     return std::unique_ptr<SymbolicFile>(new COFFImportFile(Object));
     76   case file_magic::elf_relocatable:
     77   case file_magic::macho_object:
     78   case file_magic::coff_object: {
     79     Expected<std::unique_ptr<ObjectFile>> Obj =
     80         ObjectFile::createObjectFile(Object, Type);
     81     if (!Obj || !Context)
     82       return std::move(Obj);
     83 
     84     Expected<MemoryBufferRef> BCData =
     85         IRObjectFile::findBitcodeInObject(*Obj->get());
     86     if (!BCData) {
     87       consumeError(BCData.takeError());
     88       return std::move(Obj);
     89     }
     90 
     91     return IRObjectFile::create(
     92         MemoryBufferRef(BCData->getBuffer(), Object.getBufferIdentifier()),
     93         *Context);
     94   }
     95   }
     96   llvm_unreachable("Unexpected Binary File Type");
     97 }
     98