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This patch creates skeleton implementation for the DWARFLinkerParallel. It also integrates DWARFLinkerParallel into dsymutil and llvm-dwarfutil, so that empty DWARFLinker::link() can be called. To do this new command line option is added "--linker apple/llvm". Additionally it changes existing DWARFLinker interfaces/implementations to be compatible: use Error for error reporting for the DWARFStreamer, make DWARFFile to owner of referenced resources, other small refactorings. Differential Revision: https://reviews.llvm.org/D147952
68 lines
2.2 KiB
C++
68 lines
2.2 KiB
C++
//===- OutputSections.h -----------------------------------------*- C++ -*-===//
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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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#ifndef LLVM_LIB_DWARFLINKERPARALLEL_OUTPUTSECTIONS_H
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#define LLVM_LIB_DWARFLINKERPARALLEL_OUTPUTSECTIONS_H
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#include "llvm/ADT/StringRef.h"
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#include <array>
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#include <cstdint>
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namespace llvm {
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namespace dwarflinker_parallel {
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/// This class keeps offsets to the debug sections. Any object which is
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/// supposed to be emitted into the debug section should use this class to
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/// track debug sections offsets.
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class OutputSections {
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public:
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/// List of tracked debug sections.
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enum class DebugSectionKind : uint8_t {
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DebugInfo = 0,
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DebugLine,
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DebugFrame,
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DebugRange,
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DebugRngLists,
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DebugLoc,
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DebugLocLists,
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DebugARanges,
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DebugAbbrev,
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DebugMacinfo,
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DebugMacro,
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};
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constexpr static size_t SectionKindsNum = 11;
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/// Recognise the section name and match it with the DebugSectionKind.
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static std::optional<DebugSectionKind> parseDebugSectionName(StringRef Name);
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/// When objects(f.e. compile units) are glued into the single file,
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/// the debug sections corresponding to the concrete object are assigned
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/// with offsets inside the whole file. This method returns offset
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/// to the \p SectionKind debug section, corresponding to this object.
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uint64_t getStartOffset(DebugSectionKind SectionKind) const {
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return Offsets[static_cast<
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typename std::underlying_type<DebugSectionKind>::type>(SectionKind)];
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}
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/// Set offset to the start of specified \p SectionKind debug section,
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/// corresponding to this object.
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void setStartOffset(DebugSectionKind SectionKind, uint64_t Offset) {
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Offsets[static_cast<typename std::underlying_type<DebugSectionKind>::type>(
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SectionKind)] = Offset;
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}
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protected:
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/// Offsets to the debug sections composing this object.
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std::array<uint64_t, SectionKindsNum> Offsets = {0};
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};
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} // end of namespace dwarflinker_parallel
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} // end namespace llvm
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#endif // LLVM_LIB_DWARFLINKERPARALLEL_OUTPUTSECTIONS_H
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