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88 lines
2.9 KiB
C++
88 lines
2.9 KiB
C++
//===- CodeViewYAMLTypeHashing.cpp - CodeView YAMLIO type hashing ---------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines classes for handling the YAML representation of CodeView
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// Debug Info.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ObjectYAML/CodeViewYAMLTypeHashing.h"
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#include "llvm/BinaryFormat/COFF.h"
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#include "llvm/Support/BinaryByteStream.h"
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#include "llvm/Support/BinaryStreamReader.h"
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#include "llvm/Support/BinaryStreamWriter.h"
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using namespace llvm;
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using namespace llvm::codeview;
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using namespace llvm::CodeViewYAML;
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using namespace llvm::yaml;
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namespace llvm {
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namespace yaml {
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void MappingTraits<DebugHSection>::mapping(IO &io, DebugHSection &DebugH) {
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io.mapRequired("Version", DebugH.Version);
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io.mapRequired("HashAlgorithm", DebugH.HashAlgorithm);
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io.mapOptional("HashValues", DebugH.Hashes);
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}
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void ScalarTraits<GlobalHash>::output(const GlobalHash &GH, void *Ctx,
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raw_ostream &OS) {
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ScalarTraits<BinaryRef>::output(GH.Hash, Ctx, OS);
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}
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StringRef ScalarTraits<GlobalHash>::input(StringRef Scalar, void *Ctx,
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GlobalHash &GH) {
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return ScalarTraits<BinaryRef>::input(Scalar, Ctx, GH.Hash);
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}
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} // end namespace yaml
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} // end namespace llvm
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DebugHSection llvm::CodeViewYAML::fromDebugH(ArrayRef<uint8_t> DebugH) {
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assert(DebugH.size() >= 8);
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assert((DebugH.size() - 8) % 8 == 0);
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BinaryStreamReader Reader(DebugH, llvm::support::little);
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DebugHSection DHS;
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cantFail(Reader.readInteger(DHS.Magic));
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cantFail(Reader.readInteger(DHS.Version));
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cantFail(Reader.readInteger(DHS.HashAlgorithm));
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while (Reader.bytesRemaining() != 0) {
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ArrayRef<uint8_t> S;
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cantFail(Reader.readBytes(S, 8));
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DHS.Hashes.emplace_back(S);
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}
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assert(Reader.bytesRemaining() == 0);
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return DHS;
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}
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ArrayRef<uint8_t> llvm::CodeViewYAML::toDebugH(const DebugHSection &DebugH,
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BumpPtrAllocator &Alloc) {
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uint32_t Size = 8 + 8 * DebugH.Hashes.size();
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uint8_t *Data = Alloc.Allocate<uint8_t>(Size);
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MutableArrayRef<uint8_t> Buffer(Data, Size);
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BinaryStreamWriter Writer(Buffer, llvm::support::little);
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cantFail(Writer.writeInteger(DebugH.Magic));
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cantFail(Writer.writeInteger(DebugH.Version));
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cantFail(Writer.writeInteger(DebugH.HashAlgorithm));
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SmallString<8> Hash;
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for (const auto &H : DebugH.Hashes) {
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Hash.clear();
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raw_svector_ostream OS(Hash);
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H.Hash.writeAsBinary(OS);
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assert((Hash.size() == 8) && "Invalid hash size!");
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cantFail(Writer.writeFixedString(Hash));
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}
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assert(Writer.bytesRemaining() == 0);
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return Buffer;
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}
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