| //===-- 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()); } |