1//===-- DWARFDebugArangeSet.h -----------------------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef LLVM_DEBUGINFO_DWARFDEBUGARANGESET_H
11#define LLVM_DEBUGINFO_DWARFDEBUGARANGESET_H
12
13#include "llvm/ADT/iterator_range.h"
14#include "llvm/Support/DataExtractor.h"
15#include <vector>
16
17namespace llvm {
18
19class raw_ostream;
20
21class DWARFDebugArangeSet {
22public:
23  struct Header {
24    // The total length of the entries for that set, not including the length
25    // field itself.
26    uint32_t Length;
27    // The offset from the beginning of the .debug_info section of the
28    // compilation unit entry referenced by the table.
29    uint32_t CuOffset;
30    // The DWARF version number.
31    uint16_t Version;
32    // The size in bytes of an address on the target architecture. For segmented
33    // addressing, this is the size of the offset portion of the address.
34    uint8_t AddrSize;
35    // The size in bytes of a segment descriptor on the target architecture.
36    // If the target system uses a flat address space, this value is 0.
37    uint8_t SegSize;
38  };
39
40  struct Descriptor {
41    uint64_t Address;
42    uint64_t Length;
43    uint64_t getEndAddress() const { return Address + Length; }
44  };
45
46private:
47  typedef std::vector<Descriptor> DescriptorColl;
48  typedef iterator_range<DescriptorColl::const_iterator> desc_iterator_range;
49
50  uint32_t Offset;
51  Header HeaderData;
52  DescriptorColl ArangeDescriptors;
53
54public:
55  DWARFDebugArangeSet() { clear(); }
56  void clear();
57  bool extract(DataExtractor data, uint32_t *offset_ptr);
58  void dump(raw_ostream &OS) const;
59
60  uint32_t getCompileUnitDIEOffset() const { return HeaderData.CuOffset; }
61
62  desc_iterator_range descriptors() const {
63    return desc_iterator_range(ArangeDescriptors.begin(),
64                               ArangeDescriptors.end());
65  }
66};
67
68}
69
70#endif
71