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