aboutsummaryrefslogtreecommitdiffstats
path: root/include/llvm/DebugInfo/DWARF/DWARFDebugAranges.h
blob: 791f010a8892ba38de4c95d45f66ee49d1178cfb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
//===-- DWARFDebugAranges.h -------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_DEBUGINFO_DWARFDEBUGARANGES_H
#define LLVM_LIB_DEBUGINFO_DWARFDEBUGARANGES_H

#include "llvm/ADT/DenseSet.h"
#include "llvm/Support/DataExtractor.h"
#include <vector>

namespace llvm {

class DWARFContext;

class DWARFDebugAranges {
public:
  void generate(DWARFContext *CTX);
  uint32_t findAddress(uint64_t Address) const;

private:
  void clear();
  void extract(DataExtractor DebugArangesData);

  // Call appendRange multiple times and then call construct.
  void appendRange(uint32_t CUOffset, uint64_t LowPC, uint64_t HighPC);
  void construct();

  struct Range {
    explicit Range(uint64_t LowPC = -1ULL, uint64_t HighPC = -1ULL,
                   uint32_t CUOffset = -1U)
      : LowPC(LowPC), Length(HighPC - LowPC), CUOffset(CUOffset) {}

    void setHighPC(uint64_t HighPC) {
      if (HighPC == -1ULL || HighPC <= LowPC)
        Length = 0;
      else
        Length = HighPC - LowPC;
    }
    uint64_t HighPC() const {
      if (Length)
        return LowPC + Length;
      return -1ULL;
    }

    bool containsAddress(uint64_t Address) const {
      return LowPC <= Address && Address < HighPC();
    }
    bool operator<(const Range &other) const {
      return LowPC < other.LowPC;
    }

    uint64_t LowPC; // Start of address range.
    uint32_t Length; // End of address range (not including this address).
    uint32_t CUOffset; // Offset of the compile unit or die.
  };

  struct RangeEndpoint {
    uint64_t Address;
    uint32_t CUOffset;
    bool IsRangeStart;

    RangeEndpoint(uint64_t Address, uint32_t CUOffset, bool IsRangeStart)
        : Address(Address), CUOffset(CUOffset), IsRangeStart(IsRangeStart) {}

    bool operator<(const RangeEndpoint &Other) const {
      return Address < Other.Address;
    }
  };


  typedef std::vector<Range>              RangeColl;
  typedef RangeColl::const_iterator       RangeCollIterator;

  std::vector<RangeEndpoint> Endpoints;
  RangeColl Aranges;
  DenseSet<uint32_t> ParsedCUOffsets;
};

}

#endif