34a8e6eee6
This came out of from https://discourse.llvm.org/t/dwarf-dwp-4gb-limit/63902 With big binaries we can have .dwp files where .debug_info.dwo section can grow beyond 4GB. We would like to support this in LLVM and in LLDB. The plan is to enable manual parsing of cu/tu index in DWARF library (https://reviews.llvm.org/D137882), and then switch internal index data structure to 64 bit. For the second part is to enable 64bit offset support in LLDB with this patch. Reviewed By: labath Differential Revision: https://reviews.llvm.org/D138618
39 lines
1.3 KiB
C++
39 lines
1.3 KiB
C++
//===-- DIERef.cpp --------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "DIERef.h"
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#include "lldb/Utility/DataEncoder.h"
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#include "lldb/Utility/DataExtractor.h"
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#include "llvm/Support/Format.h"
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#include <optional>
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using namespace lldb;
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using namespace lldb_private;
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void llvm::format_provider<DIERef>::format(const DIERef &ref, raw_ostream &OS,
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StringRef Style) {
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if (ref.file_index())
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OS << format_hex_no_prefix(*ref.file_index(), 8) << "/";
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OS << (ref.section() == DIERef::DebugInfo ? "INFO" : "TYPE");
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OS << "/" << format_hex_no_prefix(ref.die_offset(), 8);
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}
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std::optional<DIERef> DIERef::Decode(const DataExtractor &data,
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lldb::offset_t *offset_ptr) {
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DIERef die_ref(data.GetU64(offset_ptr));
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// DIE offsets can't be zero and if we fail to decode something from data,
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// it will return 0
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if (!die_ref.die_offset())
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return std::nullopt;
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return die_ref;
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}
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void DIERef::Encode(DataEncoder &encoder) const { encoder.AppendU64(get_id()); }
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