1 //==- NativeEnumGlobals.cpp - Native Global Enumerator impl ------*- C++ -*-==//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "llvm/DebugInfo/PDB/Native/NativeEnumGlobals.h"
11 
12 #include "llvm/DebugInfo/CodeView/SymbolDeserializer.h"
13 #include "llvm/DebugInfo/PDB/IPDBEnumChildren.h"
14 #include "llvm/DebugInfo/PDB/Native/GlobalsStream.h"
15 #include "llvm/DebugInfo/PDB/Native/NativeSession.h"
16 #include "llvm/DebugInfo/PDB/Native/PDBFile.h"
17 #include "llvm/DebugInfo/PDB/Native/SymbolStream.h"
18 #include "llvm/DebugInfo/PDB/PDBSymbol.h"
19 
20 using namespace llvm;
21 using namespace llvm::codeview;
22 using namespace llvm::pdb;
23 
NativeEnumGlobals(NativeSession & PDBSession,std::vector<codeview::SymbolKind> Kinds)24 NativeEnumGlobals::NativeEnumGlobals(NativeSession &PDBSession,
25                                      std::vector<codeview::SymbolKind> Kinds)
26     : Index(0), Session(PDBSession) {
27   GlobalsStream &GS = cantFail(Session.getPDBFile().getPDBGlobalsStream());
28   SymbolStream &SS = cantFail(Session.getPDBFile().getPDBSymbolStream());
29   for (uint32_t Off : GS.getGlobalsTable()) {
30     CVSymbol S = SS.readRecord(Off);
31     if (!llvm::is_contained(Kinds, S.kind()))
32       continue;
33     MatchOffsets.push_back(Off);
34   }
35 }
36 
getChildCount() const37 uint32_t NativeEnumGlobals::getChildCount() const {
38   return static_cast<uint32_t>(MatchOffsets.size());
39 }
40 
41 std::unique_ptr<PDBSymbol>
getChildAtIndex(uint32_t N) const42 NativeEnumGlobals::getChildAtIndex(uint32_t N) const {
43   if (N >= MatchOffsets.size())
44     return nullptr;
45 
46   SymIndexId Id =
47       Session.getSymbolCache().getOrCreateGlobalSymbolByOffset(MatchOffsets[N]);
48   return Session.getSymbolCache().getSymbolById(Id);
49 }
50 
getNext()51 std::unique_ptr<PDBSymbol> NativeEnumGlobals::getNext() {
52   return getChildAtIndex(Index++);
53 }
54 
reset()55 void NativeEnumGlobals::reset() { Index = 0; }
56