DWARFDebugArangeSet.h revision 263508 
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_DEBUGINFO_DWARFDEBUGARANGESET_H
11#define LLVM_DEBUGINFO_DWARFDEBUGARANGESET_H
12
13#include "llvm/Support/DataExtractor.h"
14#include <vector>
15
16namespace llvm {
17
18class raw_ostream;
19
20class DWARFDebugArangeSet {
21public:
22  struct Header {
23    // The total length of the entries for that set, not including the length
24    // field itself.
25    uint32_t Length;
26    // The offset from the beginning of the .debug_info section of the
27    // compilation unit entry referenced by the table.
28    uint32_t CuOffset;
29    // The DWARF version number.
30    uint16_t Version;
31    // The size in bytes of an address on the target architecture. For segmented
32    // addressing, this is the size of the offset portion of the address.
33    uint8_t AddrSize;
34    // The size in bytes of a segment descriptor on the target architecture.
35    // If the target system uses a flat address space, this value is 0.
36    uint8_t SegSize;
37  };
38
39  struct Descriptor {
40    uint64_t Address;
41    uint64_t Length;
42    uint64_t getEndAddress() const { return Address + Length; }
43  };
44
45private:
46  typedef std::vector<Descriptor> DescriptorColl;
47  typedef DescriptorColl::const_iterator DescriptorConstIter;
48
49  uint32_t Offset;
50  Header HeaderData;
51  DescriptorColl ArangeDescriptors;
52
53public:
54  DWARFDebugArangeSet() { clear(); }
55  void clear();
56  bool extract(DataExtractor data, uint32_t *offset_ptr);
57  void dump(raw_ostream &OS) const;
58
59  uint32_t getCompileUnitDIEOffset() const { return HeaderData.CuOffset; }
60  uint32_t getNumDescriptors() const { return ArangeDescriptors.size(); }
61  const Descriptor *getDescriptor(uint32_t i) const {
62    if (i < ArangeDescriptors.size())
63      return &ArangeDescriptors[i];
64    return NULL;
65  }
66};
67
68}
69
70#endif
71