1 | //===-- DWARFDebugAranges.cpp ---------------------------------------------===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | #include "DWARFDebugAranges.h" |
10 | #include "DWARFUnit.h" |
11 | #include "LogChannelDWARF.h" |
12 | #include "lldb/Utility/Log.h" |
13 | #include "lldb/Utility/Timer.h" |
14 | #include "llvm/DebugInfo/DWARF/DWARFDebugArangeSet.h" |
15 | |
16 | using namespace lldb; |
17 | using namespace lldb_private; |
18 | using namespace lldb_private::plugin::dwarf; |
19 | using llvm::DWARFDebugArangeSet; |
20 | |
21 | // Constructor |
22 | DWARFDebugAranges::DWARFDebugAranges() : m_aranges() {} |
23 | |
24 | // Extract |
25 | void DWARFDebugAranges::(const DWARFDataExtractor &debug_aranges_data) { |
26 | llvm::DWARFDataExtractor dwarf_data = debug_aranges_data.GetAsLLVMDWARF(); |
27 | lldb::offset_t offset = 0; |
28 | |
29 | DWARFDebugArangeSet set; |
30 | Range range; |
31 | while (dwarf_data.isValidOffset(offset)) { |
32 | const lldb::offset_t set_offset = offset; |
33 | if (llvm::Error error = set.extract(data: dwarf_data, offset_ptr: &offset)) { |
34 | Log *log = GetLog(mask: DWARFLog::DebugInfo); |
35 | LLDB_LOG_ERROR(log, std::move(error), |
36 | "DWARFDebugAranges::extract failed to extract " |
37 | ".debug_aranges set at offset {1:x}: {0}" , |
38 | set_offset); |
39 | set.clear(); |
40 | return; |
41 | } |
42 | const uint64_t cu_offset = set.getCompileUnitDIEOffset(); |
43 | for (const auto &desc : set.descriptors()) { |
44 | if (desc.Length != 0) |
45 | m_aranges.Append( |
46 | entry: RangeToDIE::Entry(desc.Address, desc.Length, cu_offset)); |
47 | } |
48 | } |
49 | } |
50 | |
51 | void DWARFDebugAranges::Dump(Log *log) const { |
52 | if (log == nullptr) |
53 | return; |
54 | |
55 | const size_t num_entries = m_aranges.GetSize(); |
56 | for (size_t i = 0; i < num_entries; ++i) { |
57 | const RangeToDIE::Entry *entry = m_aranges.GetEntryAtIndex(i); |
58 | if (entry) |
59 | LLDB_LOG(log, "{0:x8}: [{1:x16} - {2:x16})" , entry->data, |
60 | entry->GetRangeBase(), entry->GetRangeEnd()); |
61 | } |
62 | } |
63 | |
64 | void DWARFDebugAranges::AppendRange(dw_offset_t offset, dw_addr_t low_pc, |
65 | dw_addr_t high_pc) { |
66 | if (high_pc > low_pc) |
67 | m_aranges.Append(entry: RangeToDIE::Entry(low_pc, high_pc - low_pc, offset)); |
68 | } |
69 | |
70 | void DWARFDebugAranges::Sort(bool minimize) { |
71 | LLDB_SCOPED_TIMER(); |
72 | |
73 | m_aranges.Sort(); |
74 | m_aranges.CombineConsecutiveEntriesWithEqualData(); |
75 | } |
76 | |
77 | // FindAddress |
78 | dw_offset_t DWARFDebugAranges::FindAddress(dw_addr_t address) const { |
79 | const RangeToDIE::Entry *entry = m_aranges.FindEntryThatContains(addr: address); |
80 | if (entry) |
81 | return entry->data; |
82 | return DW_INVALID_OFFSET; |
83 | } |
84 | |