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//===- CodeViewYAMLTypeHashing.cpp - CodeView YAMLIO type hashing ---------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines classes for handling the YAML representation of CodeView
// Debug Info.
//
//===----------------------------------------------------------------------===//
#include "llvm/ObjectYAML/CodeViewYAMLTypeHashing.h"
#include "llvm/Support/BinaryByteStream.h"
#include "llvm/Support/BinaryStreamReader.h"
#include "llvm/Support/BinaryStreamWriter.h"
using namespace llvm;
using namespace llvm::codeview;
using namespace llvm::CodeViewYAML;
using namespace llvm::yaml;
namespace llvm {
namespace yaml {
void MappingTraits<DebugHSection>::mapping(IO &io, DebugHSection &DebugH) {
io.mapRequired("Version", DebugH.Version);
io.mapRequired("HashAlgorithm", DebugH.HashAlgorithm);
io.mapOptional("HashValues", DebugH.Hashes);
}
void ScalarTraits<GlobalHash>::output(const GlobalHash &GH, void *Ctx,
raw_ostream &OS) {
ScalarTraits<BinaryRef>::output(GH.Hash, Ctx, OS);
}
StringRef ScalarTraits<GlobalHash>::input(StringRef Scalar, void *Ctx,
GlobalHash &GH) {
return ScalarTraits<BinaryRef>::input(Scalar, Ctx, GH.Hash);
}
} // end namespace yaml
} // end namespace llvm
DebugHSection llvm::CodeViewYAML::fromDebugH(ArrayRef<uint8_t> DebugH) {
assert(DebugH.size() >= 8);
assert((DebugH.size() - 8) % 20 == 0);
BinaryStreamReader Reader(DebugH, llvm::support::little);
DebugHSection DHS;
cantFail(Reader.readInteger(DHS.Magic));
cantFail(Reader.readInteger(DHS.Version));
cantFail(Reader.readInteger(DHS.HashAlgorithm));
while (Reader.bytesRemaining() != 0) {
ArrayRef<uint8_t> S;
cantFail(Reader.readBytes(S, 20));
DHS.Hashes.emplace_back(S);
}
assert(Reader.bytesRemaining() == 0);
return DHS;
}
ArrayRef<uint8_t> llvm::CodeViewYAML::toDebugH(const DebugHSection &DebugH,
BumpPtrAllocator &Alloc) {
uint32_t Size = 8 + 20 * DebugH.Hashes.size();
uint8_t *Data = Alloc.Allocate<uint8_t>(Size);
MutableArrayRef<uint8_t> Buffer(Data, Size);
BinaryStreamWriter Writer(Buffer, llvm::support::little);
cantFail(Writer.writeInteger(DebugH.Magic));
cantFail(Writer.writeInteger(DebugH.Version));
cantFail(Writer.writeInteger(DebugH.HashAlgorithm));
SmallString<20> Hash;
for (const auto &H : DebugH.Hashes) {
Hash.clear();
raw_svector_ostream OS(Hash);
H.Hash.writeAsBinary(OS);
assert((Hash.size() == 20) && "Invalid hash size!");
cantFail(Writer.writeFixedString(Hash));
}
assert(Writer.bytesRemaining() == 0);
return Buffer;
}
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