yaml2obj.cpp revision 360784 
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
18namespace llvm {
19namespace yaml {
20
21bool 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
56std::unique_ptr<object::ObjectFile>
57yaml2ObjectFile(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
78