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/CVRecord.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/SymbolCache.h"
17 #include "llvm/DebugInfo/PDB/Native/SymbolStream.h"
18 #include "llvm/DebugInfo/PDB/PDBSymbol.h"
19 #include "llvm/DebugInfo/PDB/PDBTypes.h"
20 
21 using namespace llvm;
22 using namespace llvm::codeview;
23 using namespace llvm::pdb;
24 
25 NativeEnumGlobals::NativeEnumGlobals(NativeSession &PDBSession,
26                                      std::vector<codeview::SymbolKind> Kinds)
27     : Index(0), Session(PDBSession) {
28   GlobalsStream &GS = cantFail(Session.getPDBFile().getPDBGlobalsStream());
29   SymbolStream &SS = cantFail(Session.getPDBFile().getPDBSymbolStream());
30   for (uint32_t Off : GS.getGlobalsTable()) {
31     CVSymbol S = SS.readRecord(Off);
32     if (!llvm::is_contained(Kinds, S.kind()))
33       continue;
34     MatchOffsets.push_back(Off);
35   }
36 }
37 
38 uint32_t NativeEnumGlobals::getChildCount() const {
39   return static_cast<uint32_t>(MatchOffsets.size());
40 }
41 
42 std::unique_ptr<PDBSymbol>
43 NativeEnumGlobals::getChildAtIndex(uint32_t N) const {
44   if (N >= MatchOffsets.size())
45     return nullptr;
46 
47   SymIndexId Id =
48       Session.getSymbolCache().getOrCreateGlobalSymbolByOffset(MatchOffsets[N]);
49   return Session.getSymbolCache().getSymbolById(Id);
50 }
51 
52 std::unique_ptr<PDBSymbol> NativeEnumGlobals::getNext() {
53   return getChildAtIndex(Index++);
54 }
55 
56 void NativeEnumGlobals::reset() { Index = 0; }
57