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