1//===- AppendingTypeTableBuilder.cpp --------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "llvm/DebugInfo/CodeView/AppendingTypeTableBuilder.h"
10#include "llvm/ADT/ArrayRef.h"
11#include "llvm/ADT/DenseSet.h"
12#include "llvm/ADT/STLExtras.h"
13#include "llvm/DebugInfo/CodeView/CodeView.h"
14#include "llvm/DebugInfo/CodeView/ContinuationRecordBuilder.h"
15#include "llvm/DebugInfo/CodeView/RecordSerialization.h"
16#include "llvm/DebugInfo/CodeView/TypeIndex.h"
17#include "llvm/Support/Allocator.h"
18#include "llvm/Support/BinaryByteStream.h"
19#include "llvm/Support/BinaryStreamWriter.h"
20#include "llvm/Support/Endian.h"
21#include "llvm/Support/Error.h"
22#include <algorithm>
23#include <cassert>
24#include <cstdint>
25#include <cstring>
26
27using namespace llvm;
28using namespace llvm::codeview;
29
30TypeIndex AppendingTypeTableBuilder::nextTypeIndex() const {
31  return TypeIndex::fromArrayIndex(SeenRecords.size());
32}
33
34AppendingTypeTableBuilder::AppendingTypeTableBuilder(BumpPtrAllocator &Storage)
35    : RecordStorage(Storage) {}
36
37AppendingTypeTableBuilder::~AppendingTypeTableBuilder() = default;
38
39Optional<TypeIndex> AppendingTypeTableBuilder::getFirst() {
40  if (empty())
41    return None;
42
43  return TypeIndex(TypeIndex::FirstNonSimpleIndex);
44}
45
46Optional<TypeIndex> AppendingTypeTableBuilder::getNext(TypeIndex Prev) {
47  if (++Prev == nextTypeIndex())
48    return None;
49  return Prev;
50}
51
52CVType AppendingTypeTableBuilder::getType(TypeIndex Index){
53  return CVType(SeenRecords[Index.toArrayIndex()]);
54}
55
56StringRef AppendingTypeTableBuilder::getTypeName(TypeIndex Index) {
57  llvm_unreachable("Method not implemented");
58}
59
60bool AppendingTypeTableBuilder::contains(TypeIndex Index) {
61  if (Index.isSimple() || Index.isNoneType())
62    return false;
63
64  return Index.toArrayIndex() < SeenRecords.size();
65}
66
67uint32_t AppendingTypeTableBuilder::size() { return SeenRecords.size(); }
68
69uint32_t AppendingTypeTableBuilder::capacity() { return SeenRecords.size(); }
70
71ArrayRef<ArrayRef<uint8_t>> AppendingTypeTableBuilder::records() const {
72  return SeenRecords;
73}
74
75void AppendingTypeTableBuilder::reset() { SeenRecords.clear(); }
76
77TypeIndex
78AppendingTypeTableBuilder::insertRecordBytes(ArrayRef<uint8_t> &Record) {
79  TypeIndex NewTI = nextTypeIndex();
80  uint8_t *Stable = RecordStorage.Allocate<uint8_t>(Record.size());
81  memcpy(Stable, Record.data(), Record.size());
82  Record = ArrayRef<uint8_t>(Stable, Record.size());
83  SeenRecords.push_back(Record);
84  return NewTI;
85}
86
87TypeIndex
88AppendingTypeTableBuilder::insertRecord(ContinuationRecordBuilder &Builder) {
89  TypeIndex TI;
90  auto Fragments = Builder.end(nextTypeIndex());
91  assert(!Fragments.empty());
92  for (auto C : Fragments)
93    TI = insertRecordBytes(C.RecordData);
94  return TI;
95}
96