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

source code of llvm/lib/ObjectYAML/CodeViewYAMLTypeHashing.cpp