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1//===- DebugInlineeLinesSubsection.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-exception6//7//===----------------------------------------------------------------------===//8 9#include "llvm/DebugInfo/CodeView/DebugInlineeLinesSubsection.h"10#include "llvm/ADT/ArrayRef.h"11#include "llvm/DebugInfo/CodeView/CodeView.h"12#include "llvm/DebugInfo/CodeView/DebugChecksumsSubsection.h"13#include "llvm/DebugInfo/CodeView/RecordSerialization.h"14#include "llvm/Support/BinaryStreamReader.h"15#include "llvm/Support/BinaryStreamWriter.h"16#include "llvm/Support/Endian.h"17#include "llvm/Support/Error.h"18#include <cassert>19#include <cstdint>20 21using namespace llvm;22using namespace llvm::codeview;23 24Error VarStreamArrayExtractor<InlineeSourceLine>::25operator()(BinaryStreamRef Stream, uint32_t &Len, InlineeSourceLine &Item) {26  BinaryStreamReader Reader(Stream);27 28  if (auto EC = Reader.readObject(Item.Header))29    return EC;30 31  if (HasExtraFiles) {32    uint32_t ExtraFileCount;33    if (auto EC = Reader.readInteger(ExtraFileCount))34      return EC;35    if (auto EC = Reader.readArray(Item.ExtraFiles, ExtraFileCount))36      return EC;37  }38 39  Len = Reader.getOffset();40  return Error::success();41}42 43DebugInlineeLinesSubsectionRef::DebugInlineeLinesSubsectionRef()44    : DebugSubsectionRef(DebugSubsectionKind::InlineeLines) {}45 46Error DebugInlineeLinesSubsectionRef::initialize(BinaryStreamReader Reader) {47  if (auto EC = Reader.readEnum(Signature))48    return EC;49 50  Lines.getExtractor().HasExtraFiles = hasExtraFiles();51  if (auto EC = Reader.readArray(Lines, Reader.bytesRemaining()))52    return EC;53 54  assert(Reader.bytesRemaining() == 0);55  return Error::success();56}57 58bool DebugInlineeLinesSubsectionRef::hasExtraFiles() const {59  return Signature == InlineeLinesSignature::ExtraFiles;60}61 62DebugInlineeLinesSubsection::DebugInlineeLinesSubsection(63    DebugChecksumsSubsection &Checksums, bool HasExtraFiles)64    : DebugSubsection(DebugSubsectionKind::InlineeLines), Checksums(Checksums),65      HasExtraFiles(HasExtraFiles) {}66 67uint32_t DebugInlineeLinesSubsection::calculateSerializedSize() const {68  // 4 bytes for the signature69  uint32_t Size = sizeof(InlineeLinesSignature);70 71  // one header for each entry.72  Size += Entries.size() * sizeof(InlineeSourceLineHeader);73  if (HasExtraFiles) {74    // If extra files are enabled, one count for each entry.75    Size += Entries.size() * sizeof(uint32_t);76 77    // And one file id for each file.78    Size += ExtraFileCount * sizeof(uint32_t);79  }80  assert(Size % 4 == 0);81  return Size;82}83 84Error DebugInlineeLinesSubsection::commit(BinaryStreamWriter &Writer) const {85  InlineeLinesSignature Sig = InlineeLinesSignature::Normal;86  if (HasExtraFiles)87    Sig = InlineeLinesSignature::ExtraFiles;88 89  if (auto EC = Writer.writeEnum(Sig))90    return EC;91 92  for (const auto &E : Entries) {93    if (auto EC = Writer.writeObject(E.Header))94      return EC;95 96    if (!HasExtraFiles)97      continue;98 99    if (auto EC = Writer.writeInteger<uint32_t>(E.ExtraFiles.size()))100      return EC;101    if (auto EC = Writer.writeArray(ArrayRef(E.ExtraFiles)))102      return EC;103  }104 105  return Error::success();106}107 108void DebugInlineeLinesSubsection::addExtraFile(StringRef FileName) {109  uint32_t Offset = Checksums.mapChecksumOffset(FileName);110 111  auto &Entry = Entries.back();112  Entry.ExtraFiles.push_back(ulittle32_t(Offset));113  ++ExtraFileCount;114}115 116void DebugInlineeLinesSubsection::addInlineSite(TypeIndex FuncId,117                                                StringRef FileName,118                                                uint32_t SourceLine) {119  uint32_t Offset = Checksums.mapChecksumOffset(FileName);120 121  Entries.emplace_back();122  auto &Entry = Entries.back();123  Entry.Header.FileID = Offset;124  Entry.Header.SourceLineNum = SourceLine;125  Entry.Header.Inlinee = FuncId;126}127