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::iterator DescriptorIter;
48  typedef DescriptorColl::const_iterator DescriptorConstIter;
49
50  uint32_t Offset;
51  Header Header;
52  DescriptorColl ArangeDescriptors;
53
54public:
55  DWARFDebugArangeSet() { clear(); }
56  void clear();
57  void compact();
58  bool extract(DataExtractor data, uint32_t *offset_ptr);
59  void dump(raw_ostream &OS) const;
60
61  uint32_t getCompileUnitDIEOffset() const { return Header.CuOffset; }
62  uint32_t getOffsetOfNextEntry() const { return Offset + Header.Length + 4; }
63  uint32_t findAddress(uint64_t address) const;
64  uint32_t getNumDescriptors() const { return ArangeDescriptors.size(); }
65  const struct Header &getHeader() const { return Header; }
66  const Descriptor *getDescriptor(uint32_t i) const {
67    if (i < ArangeDescriptors.size())
68      return &ArangeDescriptors[i];
69    return NULL;
70  }
71};
72
73}
74
75#endif
76