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📄 AppendingTypeTableBuilder.cpp(3.51 KB)
📄 CVSymbolVisitor.cpp(2.78 KB)
📄 CVTypeVisitor.cpp(9.14 KB)
📄 CodeViewError.cpp(1.89 KB)
📄 CodeViewRecordIO.cpp(11.73 KB)
📄 ContinuationRecordBuilder.cpp(9.18 KB)
📄 DebugChecksumsSubsection.cpp(3.89 KB)
📄 DebugCrossExSubsection.cpp(1.74 KB)
📄 DebugCrossImpSubsection.cpp(3.29 KB)
📄 DebugFrameDataSubsection.cpp(2.02 KB)
📄 DebugInlineeLinesSubsection.cpp(3.85 KB)
📄 DebugLinesSubsection.cpp(5.52 KB)
📄 DebugStringTableSubsection.cpp(3.21 KB)
📄 DebugSubsection.cpp(538 B)
📄 DebugSubsectionRecord.cpp(3.4 KB)
📄 DebugSubsectionVisitor.cpp(3.34 KB)
📄 DebugSymbolRVASubsection.cpp(1.28 KB)
📄 DebugSymbolsSubsection.cpp(1.02 KB)
📄 EnumTables.cpp(21.1 KB)
📄 Formatters.cpp(1.47 KB)
📄 GlobalTypeTableBuilder.cpp(4.43 KB)
📄 LazyRandomTypeCollection.cpp(8.94 KB)
📄 Line.cpp(748 B)
📄 MergingTypeTableBuilder.cpp(4.81 KB)
📄 RecordName.cpp(10.4 KB)
📄 RecordSerialization.cpp(4.86 KB)
📄 SimpleTypeSerializer.cpp(2.4 KB)
📄 StringsAndChecksums.cpp(2.58 KB)
📄 SymbolDumper.cpp(25.61 KB)
📄 SymbolRecordHelpers.cpp(2.82 KB)
📄 SymbolRecordMapping.cpp(16.92 KB)
📄 SymbolSerializer.cpp(1.83 KB)
📄 TypeDumpVisitor.cpp(21.43 KB)
📄 TypeHashing.cpp(3.03 KB)
📄 TypeIndex.cpp(3.84 KB)
📄 TypeIndexDiscovery.cpp(16.54 KB)
📄 TypeRecordHelpers.cpp(1.59 KB)
📄 TypeRecordMapping.cpp(24.67 KB)
📄 TypeStreamMerger.cpp(18.42 KB)
📄 TypeTableCollection.cpp(1.96 KB)

Editing: MergingTypeTableBuilder.cpp

//===- MergingTypeTableBuilder.cpp ----------------------------------------===//
//
// 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/CodeView/MergingTypeTableBuilder.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/DebugInfo/CodeView/CodeView.h"
#include "llvm/DebugInfo/CodeView/ContinuationRecordBuilder.h"
#include "llvm/DebugInfo/CodeView/RecordSerialization.h"
#include "llvm/DebugInfo/CodeView/TypeIndex.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/BinaryByteStream.h"
#include "llvm/Support/BinaryStreamWriter.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/Error.h"
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <cstring>

using namespace llvm;
using namespace llvm::codeview;

TypeIndex MergingTypeTableBuilder::nextTypeIndex() const {
  return TypeIndex::fromArrayIndex(SeenRecords.size());
}

MergingTypeTableBuilder::MergingTypeTableBuilder(BumpPtrAllocator &Storage)
    : RecordStorage(Storage) {
  SeenRecords.reserve(4096);
}

MergingTypeTableBuilder::~MergingTypeTableBuilder() = default;

Optional<TypeIndex> MergingTypeTableBuilder::getFirst() {
  if (empty())
    return None;

return TypeIndex(TypeIndex::FirstNonSimpleIndex);
}

Optional<TypeIndex> MergingTypeTableBuilder::getNext(TypeIndex Prev) {
  if (++Prev == nextTypeIndex())
    return None;
  return Prev;
}

CVType MergingTypeTableBuilder::getType(TypeIndex Index) {
  CVType Type(SeenRecords[Index.toArrayIndex()]);
  return Type;
}

StringRef MergingTypeTableBuilder::getTypeName(TypeIndex Index) {
  llvm_unreachable("Method not implemented");
}

bool MergingTypeTableBuilder::contains(TypeIndex Index) {
  if (Index.isSimple() || Index.isNoneType())
    return false;

return Index.toArrayIndex() < SeenRecords.size();
}

uint32_t MergingTypeTableBuilder::size() { return SeenRecords.size(); }

uint32_t MergingTypeTableBuilder::capacity() { return SeenRecords.size(); }

ArrayRef<ArrayRef<uint8_t>> MergingTypeTableBuilder::records() const {
  return SeenRecords;
}

void MergingTypeTableBuilder::reset() {
  HashedRecords.clear();
  SeenRecords.clear();
}

static inline ArrayRef<uint8_t> stabilize(BumpPtrAllocator &Alloc,
                                          ArrayRef<uint8_t> Data) {
  uint8_t *Stable = Alloc.Allocate<uint8_t>(Data.size());
  memcpy(Stable, Data.data(), Data.size());
  return makeArrayRef(Stable, Data.size());
}

TypeIndex MergingTypeTableBuilder::insertRecordAs(hash_code Hash,
                                                  ArrayRef<uint8_t> &Record) {
  assert(Record.size() < UINT32_MAX && "Record too big");
  assert(Record.size() % 4 == 0 &&
         "The type record size is not a multiple of 4 bytes which will cause "
         "misalignment in the output TPI stream!");

LocallyHashedType WeakHash{Hash, Record};
  auto Result = HashedRecords.try_emplace(WeakHash, nextTypeIndex());

if (Result.second) {
    ArrayRef<uint8_t> RecordData = stabilize(RecordStorage, Record);
    Result.first->first.RecordData = RecordData;
    SeenRecords.push_back(RecordData);
  }

// Update the caller's copy of Record to point a stable copy.
  TypeIndex ActualTI = Result.first->second;
  Record = SeenRecords[ActualTI.toArrayIndex()];
  return ActualTI;
}

TypeIndex
MergingTypeTableBuilder::insertRecordBytes(ArrayRef<uint8_t> &Record) {
  return insertRecordAs(hash_value(Record), Record);
}

TypeIndex
MergingTypeTableBuilder::insertRecord(ContinuationRecordBuilder &Builder) {
  TypeIndex TI;
  auto Fragments = Builder.end(nextTypeIndex());
  assert(!Fragments.empty());
  for (auto C : Fragments)
    TI = insertRecordBytes(C.RecordData);
  return TI;
}

bool MergingTypeTableBuilder::replaceType(TypeIndex &Index, CVType Data,
                                          bool Stabilize) {
  assert(Index.toArrayIndex() < SeenRecords.size() &&
         "This function cannot be used to insert records!");

ArrayRef<uint8_t> Record = Data.data();
  assert(Record.size() < UINT32_MAX && "Record too big");
  assert(Record.size() % 4 == 0 &&
         "The type record size is not a multiple of 4 bytes which will cause "
         "misalignment in the output TPI stream!");

LocallyHashedType WeakHash{hash_value(Record), Record};
  auto Result = HashedRecords.try_emplace(WeakHash, Index.toArrayIndex());
  if (!Result.second) {
    Index = Result.first->second;
    return false; // The record is already there, at a different location
  }

if (Stabilize) {
    Record = stabilize(RecordStorage, Record);
    Result.first->first.RecordData = Record;
  }

SeenRecords[Index.toArrayIndex()] = Record;
  return true;
}

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Editing: MergingTypeTableBuilder.cpp

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