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_LIB_DEBUGINFO_DWARFDEBUGARANGESET_H
11 #define LLVM_LIB_DEBUGINFO_DWARFDEBUGARANGESET_H
12 
13 #include "llvm/ADT/iterator_range.h"
14 #include "llvm/Support/DataExtractor.h"
15 #include <vector>
16 
17 namespace llvm {
18 
19 class raw_ostream;
20 
21 class DWARFDebugArangeSet {
22 public:
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;
getEndAddressDescriptor43     uint64_t getEndAddress() const { return Address + Length; }
44   };
45 
46 private:
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 
54 public:
DWARFDebugArangeSet()55   DWARFDebugArangeSet() { clear(); }
56   void clear();
57   bool extract(DataExtractor data, uint32_t *offset_ptr);
58   void dump(raw_ostream &OS) const;
59 
getCompileUnitDIEOffset()60   uint32_t getCompileUnitDIEOffset() const { return HeaderData.CuOffset; }
61 
descriptors()62   desc_iterator_range descriptors() const {
63     return desc_iterator_range(ArangeDescriptors.begin(),
64                                ArangeDescriptors.end());
65   }
66 };
67 
68 }
69 
70 #endif
71