1 //===- CodeViewYAMLTypeHashing.cpp - CodeView YAMLIO type hashing ---------===//
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 classes for handling the YAML representation of CodeView
11 // Debug Info.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #include "llvm/ObjectYAML/CodeViewYAMLTypeHashing.h"
16
17 #include "llvm/BinaryFormat/COFF.h"
18 #include "llvm/Support/BinaryByteStream.h"
19 #include "llvm/Support/BinaryStreamReader.h"
20 #include "llvm/Support/BinaryStreamWriter.h"
21
22 using namespace llvm;
23 using namespace llvm::codeview;
24 using namespace llvm::CodeViewYAML;
25 using namespace llvm::yaml;
26
27 namespace llvm {
28 namespace yaml {
29
mapping(IO & io,DebugHSection & DebugH)30 void MappingTraits<DebugHSection>::mapping(IO &io, DebugHSection &DebugH) {
31 io.mapRequired("Version", DebugH.Version);
32 io.mapRequired("HashAlgorithm", DebugH.HashAlgorithm);
33 io.mapOptional("HashValues", DebugH.Hashes);
34 }
35
output(const GlobalHash & GH,void * Ctx,raw_ostream & OS)36 void ScalarTraits<GlobalHash>::output(const GlobalHash &GH, void *Ctx,
37 raw_ostream &OS) {
38 ScalarTraits<BinaryRef>::output(GH.Hash, Ctx, OS);
39 }
40
input(StringRef Scalar,void * Ctx,GlobalHash & GH)41 StringRef ScalarTraits<GlobalHash>::input(StringRef Scalar, void *Ctx,
42 GlobalHash &GH) {
43 return ScalarTraits<BinaryRef>::input(Scalar, Ctx, GH.Hash);
44 }
45
46 } // end namespace yaml
47 } // end namespace llvm
48
fromDebugH(ArrayRef<uint8_t> DebugH)49 DebugHSection llvm::CodeViewYAML::fromDebugH(ArrayRef<uint8_t> DebugH) {
50 assert(DebugH.size() >= 8);
51 assert((DebugH.size() - 8) % 8 == 0);
52
53 BinaryStreamReader Reader(DebugH, llvm::support::little);
54 DebugHSection DHS;
55 cantFail(Reader.readInteger(DHS.Magic));
56 cantFail(Reader.readInteger(DHS.Version));
57 cantFail(Reader.readInteger(DHS.HashAlgorithm));
58
59 while (Reader.bytesRemaining() != 0) {
60 ArrayRef<uint8_t> S;
61 cantFail(Reader.readBytes(S, 8));
62 DHS.Hashes.emplace_back(S);
63 }
64 assert(Reader.bytesRemaining() == 0);
65 return DHS;
66 }
67
toDebugH(const DebugHSection & DebugH,BumpPtrAllocator & Alloc)68 ArrayRef<uint8_t> llvm::CodeViewYAML::toDebugH(const DebugHSection &DebugH,
69 BumpPtrAllocator &Alloc) {
70 uint32_t Size = 8 + 8 * DebugH.Hashes.size();
71 uint8_t *Data = Alloc.Allocate<uint8_t>(Size);
72 MutableArrayRef<uint8_t> Buffer(Data, Size);
73 BinaryStreamWriter Writer(Buffer, llvm::support::little);
74
75 cantFail(Writer.writeInteger(DebugH.Magic));
76 cantFail(Writer.writeInteger(DebugH.Version));
77 cantFail(Writer.writeInteger(DebugH.HashAlgorithm));
78 SmallString<8> Hash;
79 for (const auto &H : DebugH.Hashes) {
80 Hash.clear();
81 raw_svector_ostream OS(Hash);
82 H.Hash.writeAsBinary(OS);
83 assert((Hash.size() == 8) && "Invalid hash size!");
84 cantFail(Writer.writeFixedString(Hash));
85 }
86 assert(Writer.bytesRemaining() == 0);
87 return Buffer;
88 }
89