1//===-- DWARFDebugLoc.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_DWARFDEBUGLOC_H
11#define LLVM_DEBUGINFO_DWARFDEBUGLOC_H
12
13#include "DWARFRelocMap.h"
14#include "llvm/ADT/SmallVector.h"
15#include "llvm/Support/DataExtractor.h"
16
17namespace llvm {
18
19class raw_ostream;
20
21class DWARFDebugLoc {
22  /// A single location within a location list.
23  struct Entry {
24    /// The beginning address of the instruction range.
25    uint64_t Begin;
26    /// The ending address of the instruction range.
27    uint64_t End;
28    /// The location of the variable within the specified range.
29    SmallVector<unsigned char, 4> Loc;
30  };
31
32  /// A list of locations that contain one variable.
33  struct LocationList {
34    /// The beginning offset where this location list is stored in the debug_loc
35    /// section.
36    unsigned Offset;
37    /// All the locations in which the variable is stored.
38    SmallVector<Entry, 2> Entries;
39  };
40
41  typedef SmallVector<LocationList, 4> LocationLists;
42
43  /// A list of all the variables in the debug_loc section, each one describing
44  /// the locations in which the variable is stored.
45  LocationLists Locations;
46
47  /// A map used to resolve binary relocations.
48  const RelocAddrMap &RelocMap;
49
50public:
51  DWARFDebugLoc(const RelocAddrMap &LocRelocMap) : RelocMap(LocRelocMap) {}
52  /// Print the location lists found within the debug_loc section.
53  void dump(raw_ostream &OS) const;
54  /// Parse the debug_loc section accessible via the 'data' parameter using the
55  /// specified address size to interpret the address ranges.
56  void parse(DataExtractor data, unsigned AddressSize);
57};
58
59class DWARFDebugLocDWO {
60  struct Entry {
61    uint64_t Start;
62    uint32_t Length;
63    SmallVector<unsigned char, 4> Loc;
64  };
65
66  struct LocationList {
67    unsigned Offset;
68    SmallVector<Entry, 2> Entries;
69  };
70
71  typedef SmallVector<LocationList, 4> LocationLists;
72
73  LocationLists Locations;
74
75public:
76  void parse(DataExtractor data);
77  void dump(raw_ostream &OS) const;
78};
79}
80
81#endif
82