| //===- DWARFUnitIndex.h -----------------------------------------*- 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_DEBUGINFO_DWARF_DWARFUNITINDEX_H |
| #define LLVM_DEBUGINFO_DWARF_DWARFUNITINDEX_H |
| |
| #include "llvm/ADT/ArrayRef.h" |
| #include "llvm/ADT/StringRef.h" |
| #include "llvm/Support/DataExtractor.h" |
| #include <cstdint> |
| #include <memory> |
| |
| namespace llvm { |
| |
| class raw_ostream; |
| |
| enum DWARFSectionKind { |
| DW_SECT_INFO = 1, |
| DW_SECT_TYPES, |
| DW_SECT_ABBREV, |
| DW_SECT_LINE, |
| DW_SECT_LOC, |
| DW_SECT_STR_OFFSETS, |
| DW_SECT_MACINFO, |
| DW_SECT_MACRO, |
| }; |
| |
| class DWARFUnitIndex { |
| struct Header { |
| uint32_t Version; |
| uint32_t NumColumns; |
| uint32_t NumUnits; |
| uint32_t NumBuckets = 0; |
| |
| bool parse(DataExtractor IndexData, uint64_t *OffsetPtr); |
| void dump(raw_ostream &OS) const; |
| }; |
| |
| public: |
| class Entry { |
| public: |
| struct SectionContribution { |
| uint32_t Offset; |
| uint32_t Length; |
| }; |
| |
| private: |
| const DWARFUnitIndex *Index; |
| uint64_t Signature; |
| std::unique_ptr<SectionContribution[]> Contributions; |
| friend class DWARFUnitIndex; |
| |
| public: |
| const SectionContribution *getOffset(DWARFSectionKind Sec) const; |
| const SectionContribution *getOffset() const; |
| |
| const SectionContribution *getOffsets() const { |
| return Contributions.get(); |
| } |
| |
| uint64_t getSignature() const { return Signature; } |
| }; |
| |
| private: |
| struct Header Header; |
| |
| DWARFSectionKind InfoColumnKind; |
| int InfoColumn = -1; |
| std::unique_ptr<DWARFSectionKind[]> ColumnKinds; |
| std::unique_ptr<Entry[]> Rows; |
| mutable std::vector<Entry *> OffsetLookup; |
| |
| static StringRef getColumnHeader(DWARFSectionKind DS); |
| |
| bool parseImpl(DataExtractor IndexData); |
| |
| public: |
| DWARFUnitIndex(DWARFSectionKind InfoColumnKind) |
| : InfoColumnKind(InfoColumnKind) {} |
| |
| explicit operator bool() const { return Header.NumBuckets; } |
| |
| bool parse(DataExtractor IndexData); |
| void dump(raw_ostream &OS) const; |
| |
| const Entry *getFromOffset(uint32_t Offset) const; |
| const Entry *getFromHash(uint64_t Offset) const; |
| |
| ArrayRef<DWARFSectionKind> getColumnKinds() const { |
| return makeArrayRef(ColumnKinds.get(), Header.NumColumns); |
| } |
| |
| ArrayRef<Entry> getRows() const { |
| return makeArrayRef(Rows.get(), Header.NumBuckets); |
| } |
| }; |
| |
| } // end namespace llvm |
| |
| #endif // LLVM_DEBUGINFO_DWARF_DWARFUNITINDEX_H |