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 SymbolFileDWARF_DWARFDebugArangeSet_h_
11#define SymbolFileDWARF_DWARFDebugArangeSet_h_
12
13#include "SymbolFileDWARF.h"
14#include <vector>
15
16class SymbolFileDWARF;
17
18class DWARFDebugArangeSet
19{
20public:
21    struct Header
22    {
23        uint32_t    length;     // The total length of the entries for that set, not including the length field itself.
24        uint16_t    version;    // The DWARF version number
25        uint32_t    cu_offset;  // The offset from the beginning of the .debug_info section of the compilation unit entry referenced by the table.
26        uint8_t     addr_size;  // The size in bytes of an address on the target architecture. For segmented addressing, this is the size of the offset portion of the address
27        uint8_t     seg_size;   // The size in bytes of a segment descriptor on the target architecture. If the target system uses a flat address space, this value is 0.
28    };
29
30    struct Descriptor
31    {
32        dw_addr_t   address;
33        dw_addr_t   length;
34        dw_addr_t end_address() const { return address + length; }
35    };
36
37
38                    DWARFDebugArangeSet();
39        void        Clear();
40        void        SetOffset(uint32_t offset) { m_offset = offset; }
41        void        SetHeader(uint16_t version, uint32_t cu_offset, uint8_t addr_size, uint8_t seg_size);
42        void        AddDescriptor(const DWARFDebugArangeSet::Descriptor& range);
43        void        Compact();
44        bool        Extract(const lldb_private::DataExtractor &data, lldb::offset_t *offset_ptr);
45        void        Dump(lldb_private::Stream *s) const;
46        dw_offset_t GetCompileUnitDIEOffset() const { return m_header.cu_offset; }
47        dw_offset_t GetOffsetOfNextEntry() const;
48        dw_offset_t FindAddress(dw_addr_t address) const;
49        size_t      NumDescriptors() const { return m_arange_descriptors.size(); }
50        const Header&       GetHeader() const { return m_header; }
51        const Descriptor*   GetDescriptor(uint32_t i) const
52        {
53            if (i < m_arange_descriptors.size())
54                return &m_arange_descriptors[i];
55            return NULL;
56        }
57
58        const Descriptor &
59        GetDescriptorRef (uint32_t i) const
60        {
61            return m_arange_descriptors[i];
62        }
63
64
65protected:
66    typedef std::vector<Descriptor>         DescriptorColl;
67    typedef DescriptorColl::iterator        DescriptorIter;
68    typedef DescriptorColl::const_iterator  DescriptorConstIter;
69
70
71    uint32_t        m_offset;
72    Header          m_header;
73    DescriptorColl  m_arange_descriptors;
74};
75
76#endif  // SymbolFileDWARF_DWARFDebugArangeSet_h_
77