contrib/llvm-project/llvm/lib/DebugInfo/PDB/Native/NativeEnumGlobals.cpp

   1 //==- NativeEnumGlobals.cpp - Native Global Enumerator impl ------*- 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/Native/NativeEnumGlobals.h"
  10
  11 #include "llvm/DebugInfo/CodeView/SymbolDeserializer.h"
  12 #include "llvm/DebugInfo/PDB/IPDBEnumChildren.h"
  13 #include "llvm/DebugInfo/PDB/Native/GlobalsStream.h"
  14 #include "llvm/DebugInfo/PDB/Native/NativeSession.h"
  15 #include "llvm/DebugInfo/PDB/Native/PDBFile.h"
  16 #include "llvm/DebugInfo/PDB/Native/SymbolStream.h"
  17 #include "llvm/DebugInfo/PDB/PDBSymbol.h"
  18
  19 using namespace llvm;
  20 using namespace llvm::codeview;
  21 using namespace llvm::pdb;
  22
  23 NativeEnumGlobals::NativeEnumGlobals(NativeSession &PDBSession,
  24                                      std::vector<codeview::SymbolKind> Kinds)
  25     : Index(0), Session(PDBSession) {
  26   GlobalsStream &GS = cantFail(Session.getPDBFile().getPDBGlobalsStream());
  27   SymbolStream &SS = cantFail(Session.getPDBFile().getPDBSymbolStream());
  28   for (uint32_t Off : GS.getGlobalsTable()) {
  29     CVSymbol S = SS.readRecord(Off);
  30     if (!llvm::is_contained(Kinds, S.kind()))
  31       continue;
  32     MatchOffsets.push_back(Off);
  33   }
  34 }
  35
  36 uint32_t NativeEnumGlobals::getChildCount() const {
  37   return static_cast<uint32_t>(MatchOffsets.size());
  38 }
  39
  40 std::unique_ptr<PDBSymbol>
  41 NativeEnumGlobals::getChildAtIndex(uint32_t N) const {
  42   if (N >= MatchOffsets.size())
  43     return nullptr;
  44
  45   SymIndexId Id =
  46       Session.getSymbolCache().getOrCreateGlobalSymbolByOffset(MatchOffsets[N]);
  47   return Session.getSymbolCache().getSymbolById(Id);
  48 }
  49
  50 std::unique_ptr<PDBSymbol> NativeEnumGlobals::getNext() {
  51   return getChildAtIndex(Index++);
  52 }
  53
  54 void NativeEnumGlobals::reset() { Index = 0; }