1//===- PDBSymbolData.cpp - PDB data (e.g. variable) accessors ---*- C++ -*-===//
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/PDB/PDBSymbolData.h"
10#include "llvm/DebugInfo/PDB/IPDBSectionContrib.h"
11#include "llvm/DebugInfo/PDB/IPDBSession.h"
12#include "llvm/DebugInfo/PDB/PDBSymDumper.h"
13
14#include <utility>
15
16using namespace llvm;
17using namespace llvm::pdb;
18
19void PDBSymbolData::dump(PDBSymDumper &Dumper) const { Dumper.dump(*this); }
20
21std::unique_ptr<IPDBEnumLineNumbers> PDBSymbolData::getLineNumbers() const {
22  auto Len = RawSymbol->getLength();
23  Len = Len ? Len : 1;
24  if (auto RVA = RawSymbol->getRelativeVirtualAddress())
25    return Session.findLineNumbersByRVA(RVA, Len);
26
27  if (auto Section = RawSymbol->getAddressSection())
28    return Session.findLineNumbersBySectOffset(
29        Section, RawSymbol->getAddressOffset(), Len);
30
31  return nullptr;
32}
33
34uint32_t PDBSymbolData::getCompilandId() const {
35  if (auto Lines = getLineNumbers()) {
36    if (auto FirstLine = Lines->getNext())
37      return FirstLine->getCompilandId();
38  }
39
40  uint32_t DataSection = RawSymbol->getAddressSection();
41  uint32_t DataOffset = RawSymbol->getAddressOffset();
42  if (DataSection == 0) {
43    if (auto RVA = RawSymbol->getRelativeVirtualAddress())
44      Session.addressForRVA(RVA, DataSection, DataOffset);
45  }
46
47  if (DataSection) {
48    if (auto SecContribs = Session.getSectionContribs()) {
49      while (auto Section = SecContribs->getNext()) {
50        if (Section->getAddressSection() == DataSection &&
51            Section->getAddressOffset() <= DataOffset &&
52            (Section->getAddressOffset() + Section->getLength()) > DataOffset)
53          return Section->getCompilandId();
54      }
55    }
56  } else {
57    auto LexParentId = RawSymbol->getLexicalParentId();
58    while (auto LexParent = Session.getSymbolById(LexParentId)) {
59      if (LexParent->getSymTag() == PDB_SymType::Exe)
60        break;
61      if (LexParent->getSymTag() == PDB_SymType::Compiland)
62        return LexParentId;
63      LexParentId = LexParent->getRawSymbol().getLexicalParentId();
64    }
65  }
66
67  return 0;
68}
69