contrib/llvm-project/llvm/lib/DebugInfo/PDB/PDBSymbolData.cpp

   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
  16 using namespace llvm;
  17 using namespace llvm::pdb;
  18
  19 void PDBSymbolData::dump(PDBSymDumper &Dumper) const { Dumper.dump(*this); }
  20
  21 std::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
  34 uint32_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 }