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//===- TpiStream.cpp - PDB Type Info (TPI) Stream 2 Access ----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/DebugInfo/PDB/Native/TpiStream.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/DebugInfo/CodeView/LazyRandomTypeCollection.h"
#include "llvm/DebugInfo/CodeView/TypeRecord.h"
#include "llvm/DebugInfo/MSF/MappedBlockStream.h"
#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
#include "llvm/DebugInfo/PDB/Native/RawConstants.h"
#include "llvm/DebugInfo/PDB/Native/RawError.h"
#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
#include "llvm/DebugInfo/PDB/Native/TpiHashing.h"
#include "llvm/Support/BinaryStreamReader.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/Error.h"
#include <algorithm>
#include <cstdint>
#include <vector>
using namespace llvm;
using namespace llvm::codeview;
using namespace llvm::support;
using namespace llvm::msf;
using namespace llvm::pdb;
TpiStream::TpiStream(PDBFile &File, std::unique_ptr<MappedBlockStream> Stream)
: Pdb(File), Stream(std::move(Stream)) {}
TpiStream::~TpiStream() = default;
Error TpiStream::reload() {
BinaryStreamReader Reader(*Stream);
if (Reader.bytesRemaining() < sizeof(TpiStreamHeader))
return make_error<RawError>(raw_error_code::corrupt_file,
"TPI Stream does not contain a header.");
if (Reader.readObject(Header))
return make_error<RawError>(raw_error_code::corrupt_file,
"TPI Stream does not contain a header.");
if (Header->Version != PdbTpiV80)
return make_error<RawError>(raw_error_code::corrupt_file,
"Unsupported TPI Version.");
if (Header->HeaderSize != sizeof(TpiStreamHeader))
return make_error<RawError>(raw_error_code::corrupt_file,
"Corrupt TPI Header size.");
if (Header->HashKeySize != sizeof(ulittle32_t))
return make_error<RawError>(raw_error_code::corrupt_file,
"TPI Stream expected 4 byte hash key size.");
if (Header->NumHashBuckets < MinTpiHashBuckets ||
Header->NumHashBuckets > MaxTpiHashBuckets)
return make_error<RawError>(raw_error_code::corrupt_file,
"TPI Stream Invalid number of hash buckets.");
// The actual type records themselves come from this stream
if (auto EC =
Reader.readSubstream(TypeRecordsSubstream, Header->TypeRecordBytes))
return EC;
BinaryStreamReader RecordReader(TypeRecordsSubstream.StreamData);
if (auto EC =
RecordReader.readArray(TypeRecords, TypeRecordsSubstream.size()))
return EC;
// Hash indices, hash values, etc come from the hash stream.
if (Header->HashStreamIndex != kInvalidStreamIndex) {
if (Header->HashStreamIndex >= Pdb.getNumStreams())
return make_error<RawError>(raw_error_code::corrupt_file,
"Invalid TPI hash stream index.");
auto HS = MappedBlockStream::createIndexedStream(
Pdb.getMsfLayout(), Pdb.getMsfBuffer(), Header->HashStreamIndex,
Pdb.getAllocator());
BinaryStreamReader HSR(*HS);
// There should be a hash value for every type record, or no hashes at all.
uint32_t NumHashValues =
Header->HashValueBuffer.Length / sizeof(ulittle32_t);
if (NumHashValues != getNumTypeRecords() && NumHashValues != 0)
return make_error<RawError>(
raw_error_code::corrupt_file,
"TPI hash count does not match with the number of type records.");
HSR.setOffset(Header->HashValueBuffer.Off);
if (auto EC = HSR.readArray(HashValues, NumHashValues))
return EC;
HSR.setOffset(Header->IndexOffsetBuffer.Off);
uint32_t NumTypeIndexOffsets =
Header->IndexOffsetBuffer.Length / sizeof(TypeIndexOffset);
if (auto EC = HSR.readArray(TypeIndexOffsets, NumTypeIndexOffsets))
return EC;
if (Header->HashAdjBuffer.Length > 0) {
HSR.setOffset(Header->HashAdjBuffer.Off);
if (auto EC = HashAdjusters.load(HSR))
return EC;
}
HashStream = std::move(HS);
}
Types = llvm::make_unique<LazyRandomTypeCollection>(
TypeRecords, getNumTypeRecords(), getTypeIndexOffsets());
return Error::success();
}
PdbRaw_TpiVer TpiStream::getTpiVersion() const {
uint32_t Value = Header->Version;
return static_cast<PdbRaw_TpiVer>(Value);
}
uint32_t TpiStream::TypeIndexBegin() const { return Header->TypeIndexBegin; }
uint32_t TpiStream::TypeIndexEnd() const { return Header->TypeIndexEnd; }
uint32_t TpiStream::getNumTypeRecords() const {
return TypeIndexEnd() - TypeIndexBegin();
}
uint16_t TpiStream::getTypeHashStreamIndex() const {
return Header->HashStreamIndex;
}
uint16_t TpiStream::getTypeHashStreamAuxIndex() const {
return Header->HashAuxStreamIndex;
}
uint32_t TpiStream::getNumHashBuckets() const { return Header->NumHashBuckets; }
uint32_t TpiStream::getHashKeySize() const { return Header->HashKeySize; }
BinarySubstreamRef TpiStream::getTypeRecordsSubstream() const {
return TypeRecordsSubstream;
}
FixedStreamArray<support::ulittle32_t> TpiStream::getHashValues() const {
return HashValues;
}
FixedStreamArray<TypeIndexOffset> TpiStream::getTypeIndexOffsets() const {
return TypeIndexOffsets;
}
HashTable<support::ulittle32_t> &TpiStream::getHashAdjusters() {
return HashAdjusters;
}
CVTypeRange TpiStream::types(bool *HadError) const {
return make_range(TypeRecords.begin(HadError), TypeRecords.end());
}
Error TpiStream::commit() { return Error::success(); }
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