text: //===- PDBSymbolData.cpp - PDB data (e.g. variable) accessors ---*- 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
  //
  //===----------------------------------------------------------------------===//
  
  #include "llvm/DebugInfo/PDB/PDBSymbolData.h"
  #include "llvm/DebugInfo/PDB/IPDBSectionContrib.h"
  #include "llvm/DebugInfo/PDB/IPDBSession.h"
  #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
  
  #include <utility>
  
  using namespace llvm;
  using namespace llvm::pdb;
  
  void PDBSymbolData::dump(PDBSymDumper &Dumper) const { Dumper.dump(*this); }
  
  std::unique_ptr<IPDBEnumLineNumbers> PDBSymbolData::getLineNumbers() const {
    auto Len = RawSymbol->getLength();
    Len = Len ? Len : 1;
    if (auto RVA = RawSymbol->getRelativeVirtualAddress())
      return Session.findLineNumbersByRVA(RVA, Len);
  
    if (auto Section = RawSymbol->getAddressSection())
      return Session.findLineNumbersBySectOffset(
          Section, RawSymbol->getAddressOffset(), Len);
  
    return nullptr;
  }
  
  uint32_t PDBSymbolData::getCompilandId() const {
    if (auto Lines = getLineNumbers()) {
      if (auto FirstLine = Lines->getNext())
        return FirstLine->getCompilandId();
    }
  
    uint32_t DataSection = RawSymbol->getAddressSection();
    uint32_t DataOffset = RawSymbol->getAddressOffset();
    if (DataSection == 0) {
      if (auto RVA = RawSymbol->getRelativeVirtualAddress())
        Session.addressForRVA(RVA, DataSection, DataOffset);
    }
  
    if (DataSection) {
      if (auto SecContribs = Session.getSectionContribs()) {
        while (auto Section = SecContribs->getNext()) {
          if (Section->getAddressSection() == DataSection &&
              Section->getAddressOffset() <= DataOffset &&
              (Section->getAddressOffset() + Section->getLength()) > DataOffset)
            return Section->getCompilandId();
        }
      }
    } else {
      auto LexParentId = RawSymbol->getLexicalParentId();
      while (auto LexParent = Session.getSymbolById(LexParentId)) {
        if (LexParent->getSymTag() == PDB_SymType::Exe)
          break;
        if (LexParent->getSymTag() == PDB_SymType::Compiland)
          return LexParentId;
        LexParentId = LexParent->getRawSymbol().getLexicalParentId();
      }
    }
  
    return 0;
  }
  