contrib/llvm/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugRanges.h

   1 //===-- DWARFDebugRanges.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 SymbolFileDWARF_DWARFDebugRanges_h_
  10 #define SymbolFileDWARF_DWARFDebugRanges_h_
  11
  12 #include "lldb/Core/dwarf.h"
  13 #include <map>
  14
  15 class DWARFUnit;
  16 namespace lldb_private {
  17 class DWARFContext;
  18 }
  19
  20 class DWARFDebugRangesBase {
  21 public:
  22   virtual ~DWARFDebugRangesBase(){};
  23
  24   virtual void Extract(lldb_private::DWARFContext &context) = 0;
  25   virtual bool FindRanges(const DWARFUnit *cu, dw_offset_t debug_ranges_offset,
  26                           DWARFRangeList &range_list) const = 0;
  27   virtual uint64_t GetOffset(size_t Index) const = 0;
  28 };
  29
  30 class DWARFDebugRanges final : public DWARFDebugRangesBase {
  31 public:
  32   DWARFDebugRanges();
  33
  34   void Extract(lldb_private::DWARFContext &context) override;
  35   bool FindRanges(const DWARFUnit *cu, dw_offset_t debug_ranges_offset,
  36                   DWARFRangeList &range_list) const override;
  37   uint64_t GetOffset(size_t Index) const override;
  38
  39   static void Dump(lldb_private::Stream &s,
  40                    const lldb_private::DWARFDataExtractor &debug_ranges_data,
  41                    lldb::offset_t *offset_ptr, dw_addr_t cu_base_addr);
  42
  43 protected:
  44   bool Extract(lldb_private::DWARFContext &context, lldb::offset_t *offset_ptr,
  45                DWARFRangeList &range_list);
  46
  47   typedef std::map<dw_offset_t, DWARFRangeList> range_map;
  48   typedef range_map::iterator range_map_iterator;
  49   typedef range_map::const_iterator range_map_const_iterator;
  50   range_map m_range_map;
  51 };
  52
  53 // DWARF v5 .debug_rnglists section.
  54 class DWARFDebugRngLists final : public DWARFDebugRangesBase {
  55   struct RngListEntry {
  56     uint8_t encoding;
  57     uint64_t value0;
  58     uint64_t value1;
  59   };
  60
  61 public:
  62   void Extract(lldb_private::DWARFContext &context) override;
  63   bool FindRanges(const DWARFUnit *cu, dw_offset_t debug_ranges_offset,
  64                   DWARFRangeList &range_list) const override;
  65   uint64_t GetOffset(size_t Index) const override;
  66
  67 protected:
  68   bool ExtractRangeList(const lldb_private::DWARFDataExtractor &data,
  69                         uint8_t addrSize, lldb::offset_t *offset_ptr,
  70                         std::vector<RngListEntry> &list);
  71
  72   std::vector<uint64_t> Offsets;
  73   std::map<dw_offset_t, std::vector<RngListEntry>> m_range_map;
  74 };
  75
  76 #endif // SymbolFileDWARF_DWARFDebugRanges_h_