1 | //===- DWARFDebugAranges.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 LLVM_DEBUGINFO_DWARF_DWARFDEBUGARANGES_H |
10 | #define LLVM_DEBUGINFO_DWARF_DWARFDEBUGARANGES_H |
11 | |
12 | #include "llvm/ADT/DenseSet.h" |
13 | #include "llvm/ADT/STLFunctionalExtras.h" |
14 | #include <cstdint> |
15 | #include <vector> |
16 | |
17 | namespace llvm { |
18 | class ; |
19 | class Error; |
20 | |
21 | class DWARFContext; |
22 | |
23 | class DWARFDebugAranges { |
24 | public: |
25 | void generate(DWARFContext *CTX); |
26 | uint64_t findAddress(uint64_t Address) const; |
27 | |
28 | private: |
29 | void clear(); |
30 | void (DWARFDataExtractor DebugArangesData, |
31 | function_ref<void(Error)> RecoverableErrorHandler, |
32 | function_ref<void(Error)> WarningHandler); |
33 | |
34 | /// Call appendRange multiple times and then call construct. |
35 | void appendRange(uint64_t CUOffset, uint64_t LowPC, uint64_t HighPC); |
36 | void construct(); |
37 | |
38 | struct Range { |
39 | explicit Range(uint64_t LowPC, uint64_t HighPC, uint64_t CUOffset) |
40 | : LowPC(LowPC), Length(HighPC - LowPC), CUOffset(CUOffset) {} |
41 | |
42 | void setHighPC(uint64_t HighPC) { |
43 | if (HighPC == -1ULL || HighPC <= LowPC) |
44 | Length = 0; |
45 | else |
46 | Length = HighPC - LowPC; |
47 | } |
48 | |
49 | uint64_t HighPC() const { |
50 | if (Length) |
51 | return LowPC + Length; |
52 | return -1ULL; |
53 | } |
54 | |
55 | bool operator<(const Range &other) const { |
56 | return LowPC < other.LowPC; |
57 | } |
58 | |
59 | uint64_t LowPC; /// Start of address range. |
60 | uint64_t Length; /// End of address range (not including this address). |
61 | uint64_t CUOffset; /// Offset of the compile unit or die. |
62 | }; |
63 | |
64 | struct RangeEndpoint { |
65 | uint64_t Address; |
66 | uint64_t CUOffset; |
67 | bool IsRangeStart; |
68 | |
69 | RangeEndpoint(uint64_t Address, uint64_t CUOffset, bool IsRangeStart) |
70 | : Address(Address), CUOffset(CUOffset), IsRangeStart(IsRangeStart) {} |
71 | |
72 | bool operator<(const RangeEndpoint &Other) const { |
73 | return Address < Other.Address; |
74 | } |
75 | }; |
76 | |
77 | using RangeColl = std::vector<Range>; |
78 | using RangeCollIterator = RangeColl::const_iterator; |
79 | |
80 | std::vector<RangeEndpoint> Endpoints; |
81 | RangeColl Aranges; |
82 | DenseSet<uint64_t> ParsedCUOffsets; |
83 | }; |
84 | |
85 | } // end namespace llvm |
86 | |
87 | #endif // LLVM_DEBUGINFO_DWARF_DWARFDEBUGARANGES_H |
88 | |