llvm/llvm/lib/DebugInfo/PDB/Native/GlobalsStream.cpp

//===- GlobalsStream.cpp - PDB Index of Symbols by Name ---------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// The on-disk structores used in this file are based on the reference
// implementation which is available at
// https://github.com/Microsoft/microsoft-pdb/blob/master/PDB/dbi/gsi.h
//
// When you are reading the reference source code, you'd find the
// information below useful.
//
//  - ppdb1->m_fMinimalDbgInfo seems to be always true.
//  - SMALLBUCKETS macro is defined.
//
//===----------------------------------------------------------------------===//

#include "llvm/DebugInfo/PDB/Native/GlobalsStream.h"

#include "llvm/DebugInfo/CodeView/RecordName.h"
#include "llvm/DebugInfo/MSF/MappedBlockStream.h"
#include "llvm/DebugInfo/PDB/Native/Hash.h"
#include "llvm/DebugInfo/PDB/Native/RawError.h"
#include "llvm/DebugInfo/PDB/Native/SymbolStream.h"
#include "llvm/Support/BinaryStreamReader.h"
#include "llvm/Support/Error.h"
#include <algorithm>

usingnamespacellvm;
usingnamespacellvm::msf;
usingnamespacellvm::pdb;

GlobalsStream::GlobalsStream(std::unique_ptr<MappedBlockStream> Stream)
    : … { … }

GlobalsStream::~GlobalsStream() = default;

Error GlobalsStream::reload() { … }

std::vector<std::pair<uint32_t, codeview::CVSymbol>>
GlobalsStream::findRecordsByName(StringRef Name,
                                 const SymbolStream &Symbols) const { … }

static Error checkHashHdrVersion(const GSIHashHeader *HashHdr) { … }

static Error readGSIHashHeader(const GSIHashHeader *&HashHdr,
                               BinaryStreamReader &Reader) { … }

static Error readGSIHashRecords(FixedStreamArray<PSHashRecord> &HashRecords,
                                const GSIHashHeader *HashHdr,
                                BinaryStreamReader &Reader) { … }

static Error
readGSIHashBuckets(FixedStreamArray<support::ulittle32_t> &HashBuckets,
                   FixedStreamArray<support::ulittle32_t> &HashBitmap,
                   const GSIHashHeader *HashHdr,
                   MutableArrayRef<int32_t> BucketMap,
                   BinaryStreamReader &Reader) { … }

Error GSIHashTable::read(BinaryStreamReader &Reader) { … }