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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_LIB_DEBUGINFO_DWARFDEBUGLOC_H
11 #define LLVM_LIB_DEBUGINFO_DWARFDEBUGLOC_H
12 
13 #include "llvm/ADT/SmallVector.h"
14 #include "llvm/DebugInfo/DWARF/DWARFRelocMap.h"
15 #include "llvm/Support/DataExtractor.h"
16 
17 namespace llvm {
18 
19 class raw_ostream;
20 
21 class 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 
50 public:
DWARFDebugLoc(const RelocAddrMap & LocRelocMap)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 
59 class 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 
75 public:
76   void parse(DataExtractor data);
77   void dump(raw_ostream &OS) const;
78 };
79 }
80 
81 #endif
82