1 files changed, 54 insertions, 0 deletions
diff --git a/llvm/lib/DebugInfo/PDB/Native/NativeEnumGlobals.cpp b/llvm/lib/DebugInfo/PDB/Native/NativeEnumGlobals.cpp
new file mode 100644
index 0000000000000..54646867bc5ff
--- /dev/null
+++ b/llvm/lib/DebugInfo/PDB/Native/NativeEnumGlobals.cpp
@@ -0,0 +1,54 @@
+//==- NativeEnumGlobals.cpp - Native Global Enumerator impl ------*- C++ -*-==//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/NativeEnumGlobals.h"
+
+#include "llvm/DebugInfo/CodeView/SymbolDeserializer.h"
+#include "llvm/DebugInfo/PDB/IPDBEnumChildren.h"
+#include "llvm/DebugInfo/PDB/Native/GlobalsStream.h"
+#include "llvm/DebugInfo/PDB/Native/NativeSession.h"
+#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
+#include "llvm/DebugInfo/PDB/Native/SymbolStream.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+using namespace llvm::pdb;
+
+NativeEnumGlobals::NativeEnumGlobals(NativeSession &PDBSession,
+                                     std::vector<codeview::SymbolKind> Kinds)
+    : Index(0), Session(PDBSession) {
+  GlobalsStream &GS = cantFail(Session.getPDBFile().getPDBGlobalsStream());
+  SymbolStream &SS = cantFail(Session.getPDBFile().getPDBSymbolStream());
+  for (uint32_t Off : GS.getGlobalsTable()) {
+    CVSymbol S = SS.readRecord(Off);
+    if (!llvm::is_contained(Kinds, S.kind()))
+      continue;
+    MatchOffsets.push_back(Off);
+  }
+}
+
+uint32_t NativeEnumGlobals::getChildCount() const {
+  return static_cast<uint32_t>(MatchOffsets.size());
+}
+
+std::unique_ptr<PDBSymbol>
+NativeEnumGlobals::getChildAtIndex(uint32_t N) const {
+  if (N >= MatchOffsets.size())
+    return nullptr;
+
+  SymIndexId Id =
+      Session.getSymbolCache().getOrCreateGlobalSymbolByOffset(MatchOffsets[N]);
+  return Session.getSymbolCache().getSymbolById(Id);
+}
+
+std::unique_ptr<PDBSymbol> NativeEnumGlobals::getNext() {
+  return getChildAtIndex(Index++);
+}
+
+void NativeEnumGlobals::reset() { Index = 0; }