1 //===-- DWARFDebugArangeSet.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 LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFDEBUGARANGESET_H
10 #define LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFDEBUGARANGESET_H
11 
12 #include "lldb/Core/dwarf.h"
13 #include <cstdint>
14 #include <vector>
15 
16 class DWARFDebugArangeSet {
17 public:
18   struct Header {
19     /// The total length of the entries for that set, not including the length
20     /// field itself.
21     uint32_t length = 0;
22     /// The DWARF version number.
23     uint16_t version = 0;
24     /// The offset from the beginning of the .debug_info section of the
25     /// compilation unit entry referenced by the table.
26     uint32_t cu_offset = 0;
27     /// The size in bytes of an address on the target architecture. For
28     /// segmented addressing, this is the size of the offset portion of the
29     /// address.
30     uint8_t addr_size = 0;
31     /// The size in bytes of a segment descriptor on the target architecture.
32     /// If the target system uses a flat address space, this value is 0.
33     uint8_t seg_size = 0;
34   };
35 
36   struct Descriptor {
37     dw_addr_t address;
38     dw_addr_t length;
39     dw_addr_t end_address() const { return address + length; }
40   };
41 
42   DWARFDebugArangeSet();
43   void Clear();
44   void SetOffset(uint32_t offset) { m_offset = offset; }
45   llvm::Error extract(const lldb_private::DWARFDataExtractor &data,
46                       lldb::offset_t *offset_ptr);
47   dw_offset_t FindAddress(dw_addr_t address) const;
48   size_t NumDescriptors() const { return m_arange_descriptors.size(); }
49   const Header &GetHeader() const { return m_header; }
50   dw_offset_t GetNextOffset() const { return m_next_offset; }
51   const Descriptor &GetDescriptorRef(uint32_t i) const {
52     return m_arange_descriptors[i];
53   }
54 
55 protected:
56   typedef std::vector<Descriptor> DescriptorColl;
57   typedef DescriptorColl::iterator DescriptorIter;
58   typedef DescriptorColl::const_iterator DescriptorConstIter;
59 
60   dw_offset_t m_offset;
61   dw_offset_t m_next_offset;
62   Header m_header;
63   DescriptorColl m_arange_descriptors;
64 };
65 
66 #endif // LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFDEBUGARANGESET_H
67