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)
31 lldb::offset_t offset = 0;
32 dw_offset_t debug_ranges_offset = offset;
33 while (Extract(dwarf2Data, &offset, range_list))
35 m_range_map[debug_ranges_offset] = range_list;
36 debug_ranges_offset = offset;
41 //DWARFDebugRanges::RangeList::AddOffset(dw_addr_t offset)
43 // if (!ranges.empty())
45 // Range::iterator pos = ranges.begin();
46 // Range::iterator end_pos = ranges.end();
47 // for (pos = ranges.begin(); pos != end_pos; ++pos)
49 // // assert for unsigned overflows
50 // assert (~pos->begin_offset >= offset);
51 // assert (~pos->end_offset >= offset);
52 // pos->begin_offset += offset;
53 // pos->end_offset += offset;
59 //DWARFDebugRanges::RangeList::SubtractOffset(dw_addr_t offset)
61 // if (!ranges.empty())
63 // Range::iterator pos = ranges.begin();
64 // Range::iterator end_pos = ranges.end();
65 // for (pos = ranges.begin(); pos != end_pos; ++pos)
67 // assert (pos->begin_offset >= offset);
68 // assert (pos->end_offset >= offset);
69 // pos->begin_offset -= offset;
70 // pos->end_offset -= offset;
76 //const DWARFDebugRanges::Range*
77 //DWARFDebugRanges::RangeList::RangeAtIndex(size_t i) const
79 // if (i < ranges.size())
85 DWARFDebugRanges::Extract(SymbolFileDWARF* dwarf2Data, lldb::offset_t *offset_ptr, RangeList &range_list)
89 lldb::offset_t range_offset = *offset_ptr;
90 const DataExtractor& debug_ranges_data = dwarf2Data->get_debug_ranges_data();
91 uint32_t addr_size = debug_ranges_data.GetAddressByteSize();
93 while (debug_ranges_data.ValidOffsetForDataOfSize(*offset_ptr, 2 * addr_size))
95 dw_addr_t begin = debug_ranges_data.GetMaxU64(offset_ptr, addr_size);
96 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
107 if (begin == 0xFFFFull)
108 begin = LLDB_INVALID_ADDRESS;
112 if (begin == 0xFFFFFFFFull)
113 begin = LLDB_INVALID_ADDRESS;
120 assert(!"DWARFDebugRanges::RangeList::Extract() unsupported address size.");
124 // Filter out empty ranges
126 range_list.Append(Range(begin, end - begin));
129 // Make sure we consumed at least something
130 return range_offset != *offset_ptr;
135 DWARFDebugRanges::Dump(Stream &s, const DataExtractor& debug_ranges_data, lldb::offset_t *offset_ptr, dw_addr_t cu_base_addr)
137 uint32_t addr_size = s.GetAddressByteSize();
138 bool verbose = s.GetVerbose();
140 dw_addr_t base_addr = cu_base_addr;
141 while (debug_ranges_data.ValidOffsetForDataOfSize(*offset_ptr, 2 * addr_size))
143 dw_addr_t begin = debug_ranges_data.GetMaxU64(offset_ptr, addr_size);
144 dw_addr_t end = debug_ranges_data.GetMaxU64(offset_ptr, addr_size);
145 // Extend 4 byte addresses that consits of 32 bits of 1's to be 64 bits
147 if (begin == 0xFFFFFFFFull && addr_size == 4)
148 begin = LLDB_INVALID_ADDRESS;
153 s.AddressRange(begin, end, sizeof (dw_addr_t), " offsets = ");
157 if (begin == 0 && end == 0)
159 s.PutCString(" End");
162 else if (begin == LLDB_INVALID_ADDRESS)
164 // A base address selection entry
166 s.Address(base_addr, sizeof (dw_addr_t), " Base address = ");
170 // Convert from offset to an address
171 dw_addr_t begin_addr = begin + base_addr;
172 dw_addr_t end_addr = end + base_addr;
174 s.AddressRange(begin_addr, end_addr, sizeof (dw_addr_t), verbose ? " ==> addrs = " : NULL);
180 DWARFDebugRanges::FindRanges(dw_offset_t debug_ranges_offset, RangeList& range_list) const
182 range_map_const_iterator pos = m_range_map.find(debug_ranges_offset);
183 if (pos != m_range_map.end())
185 range_list = pos->second;