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
16using namespace lldb;
17using namespace lldb_private;
18using namespace lldb_private::plugin::dwarf;
19using llvm::DWARFDebugArangeSet;
20
21// Constructor
22DWARFDebugAranges::DWARFDebugAranges() : m_aranges() {}
23
24// Extract
25void DWARFDebugAranges::extract(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
51void 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
64void 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
70void DWARFDebugAranges::Sort(bool minimize) {
71 LLDB_SCOPED_TIMER();
72
73 m_aranges.Sort();
74 m_aranges.CombineConsecutiveEntriesWithEqualData();
75}
76
77// FindAddress
78dw_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

source code of lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugAranges.cpp