1 files changed, 39 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Plugins/SymbolFile/DWARF/DIERef.cpp b/contrib/llvm-project/lldb/source/Plugins/SymbolFile/DWARF/DIERef.cpp
new file mode 100644
index 000000000000..163e9f4c081c
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Plugins/SymbolFile/DWARF/DIERef.cpp
@@ -0,0 +1,39 @@
+//===-- DIERef.cpp --------------------------------------------------------===//
+//
+// 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 "DIERef.h"
+#include "lldb/Utility/DataEncoder.h"
+#include "lldb/Utility/DataExtractor.h"
+#include "llvm/Support/Format.h"
+#include <optional>
+
+using namespace lldb;
+using namespace lldb_private;
+using namespace lldb_private::plugin::dwarf;
+
+void llvm::format_provider<DIERef>::format(const DIERef &ref, raw_ostream &OS,
+                                           StringRef Style) {
+  if (ref.file_index())
+    OS << format_hex_no_prefix(*ref.file_index(), 8) << "/";
+  OS << (ref.section() == DIERef::DebugInfo ? "INFO" : "TYPE");
+  OS << "/" << format_hex_no_prefix(ref.die_offset(), 8);
+}
+
+std::optional<DIERef> DIERef::Decode(const DataExtractor &data,
+                                     lldb::offset_t *offset_ptr) {
+  DIERef die_ref(data.GetU64(offset_ptr));
+
+  // DIE offsets can't be zero and if we fail to decode something from data,
+  // it will return 0
+  if (!die_ref.die_offset())
+    return std::nullopt;
+
+  return die_ref;
+}
+
+void DIERef::Encode(DataEncoder &encoder) const { encoder.AppendU64(get_id()); }