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::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(dwarf_data, &offset)) { 34 Log *log = GetLog(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 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(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(address); 80 if (entry) 81 return entry->data; 82 return DW_INVALID_OFFSET; 83 } 84