106 lines
2.5 KiB
C++
106 lines
2.5 KiB
C++
//===- DWARFUnitIndex.h -----------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_DEBUGINFO_DWARF_DWARFUNITINDEX_H
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#define LLVM_DEBUGINFO_DWARF_DWARFUNITINDEX_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/DataExtractor.h"
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#include <cstdint>
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#include <memory>
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namespace llvm {
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class raw_ostream;
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enum DWARFSectionKind {
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DW_SECT_INFO = 1,
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DW_SECT_TYPES,
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DW_SECT_ABBREV,
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DW_SECT_LINE,
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DW_SECT_LOC,
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DW_SECT_STR_OFFSETS,
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DW_SECT_MACINFO,
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DW_SECT_MACRO,
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};
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class DWARFUnitIndex {
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struct Header {
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uint32_t Version;
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uint32_t NumColumns;
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uint32_t NumUnits;
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uint32_t NumBuckets = 0;
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bool parse(DataExtractor IndexData, uint32_t *OffsetPtr);
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void dump(raw_ostream &OS) const;
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};
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public:
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class Entry {
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public:
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struct SectionContribution {
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uint32_t Offset;
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uint32_t Length;
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};
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private:
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const DWARFUnitIndex *Index;
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uint64_t Signature;
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std::unique_ptr<SectionContribution[]> Contributions;
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friend class DWARFUnitIndex;
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public:
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const SectionContribution *getOffset(DWARFSectionKind Sec) const;
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const SectionContribution *getOffset() const;
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const SectionContribution *getOffsets() const {
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return Contributions.get();
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}
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uint64_t getSignature() const { return Signature; }
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};
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private:
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struct Header Header;
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DWARFSectionKind InfoColumnKind;
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int InfoColumn = -1;
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std::unique_ptr<DWARFSectionKind[]> ColumnKinds;
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std::unique_ptr<Entry[]> Rows;
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static StringRef getColumnHeader(DWARFSectionKind DS);
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bool parseImpl(DataExtractor IndexData);
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public:
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DWARFUnitIndex(DWARFSectionKind InfoColumnKind)
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: InfoColumnKind(InfoColumnKind) {}
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explicit operator bool() const { return Header.NumBuckets; }
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bool parse(DataExtractor IndexData);
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void dump(raw_ostream &OS) const;
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const Entry *getFromOffset(uint32_t Offset) const;
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const Entry *getFromHash(uint64_t Offset) const;
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ArrayRef<DWARFSectionKind> getColumnKinds() const {
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return makeArrayRef(ColumnKinds.get(), Header.NumColumns);
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}
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ArrayRef<Entry> getRows() const {
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return makeArrayRef(Rows.get(), Header.NumBuckets);
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}
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};
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} // end namespace llvm
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#endif // LLVM_DEBUGINFO_DWARF_DWARFUNITINDEX_H
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