lib/ObjectYAML/yaml2obj.cpp

   1 //===-- yaml2obj.cpp ------------------------------------------------------===//
   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 #include "llvm/ObjectYAML/yaml2obj.h"
  10 #include "llvm/ADT/StringExtras.h"
  11 #include "llvm/ADT/Twine.h"
  12 #include "llvm/Object/ObjectFile.h"
  13 #include "llvm/ObjectYAML/ObjectYAML.h"
  14 #include "llvm/Support/Errc.h"
  15 #include "llvm/Support/WithColor.h"
  16 #include "llvm/Support/YAMLTraits.h"
  17
  18 namespace llvm {
  19 namespace yaml {
  20
  21 bool convertYAML(yaml::Input &YIn, raw_ostream &Out, ErrorHandler ErrHandler,
  22                  unsigned DocNum) {
  23   unsigned CurDocNum = 0;
  24   do {
  25     if (++CurDocNum != DocNum)
  26       continue;
  27
  28     yaml::YamlObjectFile Doc;
  29     YIn >> Doc;
  30     if (std::error_code EC = YIn.error()) {
  31       ErrHandler("failed to parse YAML input: " + EC.message());
  32       return false;
  33     }
  34
  35     if (Doc.Elf)
  36       return yaml2elf(*Doc.Elf, Out, ErrHandler);
  37     if (Doc.Coff)
  38       return yaml2coff(*Doc.Coff, Out, ErrHandler);
  39     if (Doc.MachO || Doc.FatMachO)
  40       return yaml2macho(Doc, Out, ErrHandler);
  41     if (Doc.Minidump)
  42       return yaml2minidump(*Doc.Minidump, Out, ErrHandler);
  43     if (Doc.Wasm)
  44       return yaml2wasm(*Doc.Wasm, Out, ErrHandler);
  45
  46     ErrHandler("unknown document type");
  47     return false;
  48
  49   } while (YIn.nextDocument());
  50
  51   ErrHandler("cannot find the " + Twine(DocNum) +
  52              getOrdinalSuffix(DocNum).data() + " document");
  53   return false;
  54 }
  55
  56 std::unique_ptr<object::ObjectFile>
  57 yaml2ObjectFile(SmallVectorImpl<char> &Storage, StringRef Yaml,
  58                 ErrorHandler ErrHandler) {
  59   Storage.clear();
  60   raw_svector_ostream OS(Storage);
  61
  62   yaml::Input YIn(Yaml);
  63   if (!convertYAML(YIn, OS, ErrHandler))
  64     return {};
  65
  66   Expected<std::unique_ptr<object::ObjectFile>> ObjOrErr =
  67       object::ObjectFile::createObjectFile(
  68           MemoryBufferRef(OS.str(), "YamlObject"));
  69   if (ObjOrErr)
  70     return std::move(*ObjOrErr);
  71
  72   ErrHandler(toString(ObjOrErr.takeError()));
  73   return {};
  74 }
  75
  76 } // namespace yaml
  77 } // namespace llvm