2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
127 lines
4.1 KiB
C++
127 lines
4.1 KiB
C++
//===- NamedStreamMap.cpp - PDB Named Stream Map --------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/DebugInfo/PDB/Native/NamedStreamMap.h"
|
|
#include "llvm/ADT/StringMap.h"
|
|
#include "llvm/ADT/StringRef.h"
|
|
#include "llvm/ADT/iterator_range.h"
|
|
#include "llvm/DebugInfo/PDB/Native/Hash.h"
|
|
#include "llvm/DebugInfo/PDB/Native/HashTable.h"
|
|
#include "llvm/DebugInfo/PDB/Native/RawError.h"
|
|
#include "llvm/Support/BinaryStreamReader.h"
|
|
#include "llvm/Support/BinaryStreamRef.h"
|
|
#include "llvm/Support/BinaryStreamWriter.h"
|
|
#include "llvm/Support/Endian.h"
|
|
#include "llvm/Support/Error.h"
|
|
#include <algorithm>
|
|
#include <cassert>
|
|
#include <cstdint>
|
|
#include <tuple>
|
|
|
|
using namespace llvm;
|
|
using namespace llvm::pdb;
|
|
|
|
NamedStreamMapTraits::NamedStreamMapTraits(NamedStreamMap &NS) : NS(&NS) {}
|
|
|
|
uint16_t NamedStreamMapTraits::hashLookupKey(StringRef S) const {
|
|
// In the reference implementation, this uses
|
|
// HASH Hasher<ULONG*, USHORT*>::hashPbCb(PB pb, size_t cb, ULONG ulMod).
|
|
// Here, the type HASH is a typedef of unsigned short.
|
|
// ** It is not a bug that we truncate the result of hashStringV1, in fact
|
|
// it is a bug if we do not! **
|
|
return static_cast<uint16_t>(hashStringV1(S));
|
|
}
|
|
|
|
StringRef NamedStreamMapTraits::storageKeyToLookupKey(uint32_t Offset) const {
|
|
return NS->getString(Offset);
|
|
}
|
|
|
|
uint32_t NamedStreamMapTraits::lookupKeyToStorageKey(StringRef S) {
|
|
return NS->appendStringData(S);
|
|
}
|
|
|
|
NamedStreamMap::NamedStreamMap()
|
|
: HashTraits(*this), OffsetIndexMap(1, HashTraits) {}
|
|
|
|
Error NamedStreamMap::load(BinaryStreamReader &Stream) {
|
|
uint32_t StringBufferSize;
|
|
if (auto EC = Stream.readInteger(StringBufferSize))
|
|
return joinErrors(std::move(EC),
|
|
make_error<RawError>(raw_error_code::corrupt_file,
|
|
"Expected string buffer size"));
|
|
|
|
StringRef Buffer;
|
|
if (auto EC = Stream.readFixedString(Buffer, StringBufferSize))
|
|
return EC;
|
|
NamesBuffer.assign(Buffer.begin(), Buffer.end());
|
|
|
|
return OffsetIndexMap.load(Stream);
|
|
}
|
|
|
|
Error NamedStreamMap::commit(BinaryStreamWriter &Writer) const {
|
|
// The first field is the number of bytes of string data.
|
|
if (auto EC = Writer.writeInteger<uint32_t>(NamesBuffer.size()))
|
|
return EC;
|
|
|
|
// Then the actual string data.
|
|
StringRef Data(NamesBuffer.data(), NamesBuffer.size());
|
|
if (auto EC = Writer.writeFixedString(Data))
|
|
return EC;
|
|
|
|
// And finally the Offset Index map.
|
|
if (auto EC = OffsetIndexMap.commit(Writer))
|
|
return EC;
|
|
|
|
return Error::success();
|
|
}
|
|
|
|
uint32_t NamedStreamMap::calculateSerializedLength() const {
|
|
return sizeof(uint32_t) // String data size
|
|
+ NamesBuffer.size() // String data
|
|
+ OffsetIndexMap.calculateSerializedLength(); // Offset Index Map
|
|
}
|
|
|
|
uint32_t NamedStreamMap::size() const { return OffsetIndexMap.size(); }
|
|
|
|
StringRef NamedStreamMap::getString(uint32_t Offset) const {
|
|
assert(NamesBuffer.size() > Offset);
|
|
return StringRef(NamesBuffer.data() + Offset);
|
|
}
|
|
|
|
uint32_t NamedStreamMap::hashString(uint32_t Offset) const {
|
|
return hashStringV1(getString(Offset));
|
|
}
|
|
|
|
bool NamedStreamMap::get(StringRef Stream, uint32_t &StreamNo) const {
|
|
auto Iter = OffsetIndexMap.find_as(Stream);
|
|
if (Iter == OffsetIndexMap.end())
|
|
return false;
|
|
StreamNo = (*Iter).second;
|
|
return true;
|
|
}
|
|
|
|
StringMap<uint32_t> NamedStreamMap::entries() const {
|
|
StringMap<uint32_t> Result;
|
|
for (const auto &Entry : OffsetIndexMap) {
|
|
StringRef Stream(NamesBuffer.data() + Entry.first);
|
|
Result.try_emplace(Stream, Entry.second);
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
uint32_t NamedStreamMap::appendStringData(StringRef S) {
|
|
uint32_t Offset = NamesBuffer.size();
|
|
NamesBuffer.insert(NamesBuffer.end(), S.begin(), S.end());
|
|
NamesBuffer.push_back('\0');
|
|
return Offset;
|
|
}
|
|
|
|
void NamedStreamMap::set(StringRef Stream, uint32_t StreamNo) {
|
|
OffsetIndexMap.set_as(Stream, support::ulittle32_t(StreamNo));
|
|
}
|