1 //===-- DWARFDebugRanges.cpp ------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "DWARFDebugRanges.h"
11 #include "SymbolFileDWARF.h"
12 #include "lldb/Core/Stream.h"
15 using namespace lldb_private;
18 DWARFDebugRanges::DWARFDebugRanges() :
23 DWARFDebugRanges::~DWARFDebugRanges()
28 DWARFDebugRanges::Extract(SymbolFileDWARF* dwarf2Data)
30 DWARFRangeList range_list;
31 lldb::offset_t offset = 0;
32 dw_offset_t debug_ranges_offset = offset;
33 while (Extract(dwarf2Data, &offset, range_list))
36 m_range_map[debug_ranges_offset] = range_list;
37 debug_ranges_offset = offset;
42 DWARFDebugRanges::Extract(SymbolFileDWARF* dwarf2Data, lldb::offset_t *offset_ptr, DWARFRangeList &range_list)
46 lldb::offset_t range_offset = *offset_ptr;
47 const DWARFDataExtractor& debug_ranges_data = dwarf2Data->get_debug_ranges_data();
48 uint32_t addr_size = debug_ranges_data.GetAddressByteSize();
50 while (debug_ranges_data.ValidOffsetForDataOfSize(*offset_ptr, 2 * addr_size))
52 dw_addr_t begin = debug_ranges_data.GetMaxU64(offset_ptr, addr_size);
53 dw_addr_t end = debug_ranges_data.GetMaxU64(offset_ptr, addr_size);
59 // Extend 4 byte addresses that consists of 32 bits of 1's to be 64 bits
64 if (begin == 0xFFFFull)
65 begin = LLDB_INVALID_ADDRESS;
69 if (begin == 0xFFFFFFFFull)
70 begin = LLDB_INVALID_ADDRESS;
77 assert(!"DWARFRangeList::Extract() unsupported address size.");
81 // Filter out empty ranges
83 range_list.Append(DWARFRangeList::Entry(begin, end - begin));
86 // Make sure we consumed at least something
87 return range_offset != *offset_ptr;
92 DWARFDebugRanges::Dump(Stream &s, const DWARFDataExtractor& debug_ranges_data, lldb::offset_t *offset_ptr, dw_addr_t cu_base_addr)
94 uint32_t addr_size = s.GetAddressByteSize();
95 bool verbose = s.GetVerbose();
97 dw_addr_t base_addr = cu_base_addr;
98 while (debug_ranges_data.ValidOffsetForDataOfSize(*offset_ptr, 2 * addr_size))
100 dw_addr_t begin = debug_ranges_data.GetMaxU64(offset_ptr, addr_size);
101 dw_addr_t end = debug_ranges_data.GetMaxU64(offset_ptr, addr_size);
102 // Extend 4 byte addresses that consists of 32 bits of 1's to be 64 bits
104 if (begin == 0xFFFFFFFFull && addr_size == 4)
105 begin = LLDB_INVALID_ADDRESS;
110 s.AddressRange(begin, end, sizeof (dw_addr_t), " offsets = ");
114 if (begin == 0 && end == 0)
116 s.PutCString(" End");
119 else if (begin == LLDB_INVALID_ADDRESS)
121 // A base address selection entry
123 s.Address(base_addr, sizeof (dw_addr_t), " Base address = ");
127 // Convert from offset to an address
128 dw_addr_t begin_addr = begin + base_addr;
129 dw_addr_t end_addr = end + base_addr;
131 s.AddressRange(begin_addr, end_addr, sizeof (dw_addr_t), verbose ? " ==> addrs = " : NULL);
137 DWARFDebugRanges::FindRanges(dw_offset_t debug_ranges_offset, DWARFRangeList& range_list) const
139 range_map_const_iterator pos = m_range_map.find(debug_ranges_offset);
140 if (pos != m_range_map.end())
142 range_list = pos->second;