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  1. //===- DWARFDebugRnglists.h -------------------------------------*- C++ -*-===//
  2. //
  3. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  4. // See https://llvm.org/LICENSE.txt for license information.
  5. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  6. //
  7. //===----------------------------------------------------------------------===//
  8.  
  9. #ifndef LLVM_DEBUGINFO_DWARF_DWARFDEBUGRNGLISTS_H
  10. #define LLVM_DEBUGINFO_DWARF_DWARFDEBUGRNGLISTS_H
  11.  
  12. #include "llvm/ADT/STLFunctionalExtras.h"
  13. #include "llvm/BinaryFormat/Dwarf.h"
  14. #include "llvm/DebugInfo/DWARF/DWARFAddressRange.h"
  15. #include "llvm/DebugInfo/DWARF/DWARFListTable.h"
  16. #include <cstdint>
  17.  
  18. namespace llvm {
  19.  
  20. class Error;
  21. class raw_ostream;
  22. class DWARFUnit;
  23. class DWARFDataExtractor;
  24. struct DIDumpOptions;
  25. namespace object {
  26. struct SectionedAddress;
  27. }
  28.  
  29. /// A class representing a single range list entry.
  30. struct RangeListEntry : public DWARFListEntryBase {
  31.   /// The values making up the range list entry. Most represent a range with
  32.   /// a start and end address or a start address and a length. Others are
  33.   /// single value base addresses or end-of-list with no values. The unneeded
  34.   /// values are semantically undefined, but initialized to 0.
  35.   uint64_t Value0;
  36.   uint64_t Value1;
  37.  
  38.   Error extract(DWARFDataExtractor Data, uint64_t *OffsetPtr);
  39.   void
  40.   dump(raw_ostream &OS, uint8_t AddrSize, uint8_t MaxEncodingStringLength,
  41.        uint64_t &CurrentBase, DIDumpOptions DumpOpts,
  42.        llvm::function_ref<std::optional<object::SectionedAddress>(uint32_t)>
  43.            LookupPooledAddress) const;
  44.   bool isSentinel() const { return EntryKind == dwarf::DW_RLE_end_of_list; }
  45. };
  46.  
  47. /// A class representing a single rangelist.
  48. class DWARFDebugRnglist : public DWARFListType<RangeListEntry> {
  49. public:
  50.   /// Build a DWARFAddressRangesVector from a rangelist.
  51.   DWARFAddressRangesVector getAbsoluteRanges(
  52.       std::optional<object::SectionedAddress> BaseAddr, uint8_t AddressByteSize,
  53.       function_ref<std::optional<object::SectionedAddress>(uint32_t)>
  54.           LookupPooledAddress) const;
  55.  
  56.   /// Build a DWARFAddressRangesVector from a rangelist.
  57.   DWARFAddressRangesVector
  58.   getAbsoluteRanges(std::optional<object::SectionedAddress> BaseAddr,
  59.                     DWARFUnit &U) const;
  60. };
  61.  
  62. class DWARFDebugRnglistTable : public DWARFListTableBase<DWARFDebugRnglist> {
  63. public:
  64.   DWARFDebugRnglistTable()
  65.       : DWARFListTableBase(/* SectionName    = */ ".debug_rnglists",
  66.                            /* HeaderString   = */ "ranges:",
  67.                            /* ListTypeString = */ "range") {}
  68. };
  69.  
  70. } // end namespace llvm
  71.  
  72. #endif // LLVM_DEBUGINFO_DWARF_DWARFDEBUGRNGLISTS_H
  73.