4206c37bd1
They are close enough to swap lldb's `DWARFDebugArangeSet` with the llvm one. The difference is that llvm's `DWARFDebugArangeSet` add empty ranges when extracting. To accommodate this, `DWARFDebugAranges` in lldb filters out empty ranges when extracting.
84 lines
2.6 KiB
C++
84 lines
2.6 KiB
C++
//===-- DWARFDebugAranges.cpp ---------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "DWARFDebugAranges.h"
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#include "DWARFUnit.h"
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#include "LogChannelDWARF.h"
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#include "lldb/Utility/Log.h"
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#include "lldb/Utility/Timer.h"
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#include "llvm/DebugInfo/DWARF/DWARFDebugArangeSet.h"
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using namespace lldb;
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using namespace lldb_private;
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using namespace lldb_private::plugin::dwarf;
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using llvm::DWARFDebugArangeSet;
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// Constructor
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DWARFDebugAranges::DWARFDebugAranges() : m_aranges() {}
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// Extract
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void DWARFDebugAranges::extract(const DWARFDataExtractor &debug_aranges_data) {
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llvm::DWARFDataExtractor dwarf_data = debug_aranges_data.GetAsLLVMDWARF();
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lldb::offset_t offset = 0;
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DWARFDebugArangeSet set;
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Range range;
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while (dwarf_data.isValidOffset(offset)) {
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const lldb::offset_t set_offset = offset;
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if (llvm::Error error = set.extract(dwarf_data, &offset)) {
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Log *log = GetLog(DWARFLog::DebugInfo);
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LLDB_LOG_ERROR(log, std::move(error),
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"DWARFDebugAranges::extract failed to extract "
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".debug_aranges set at offset {1:x}: {0}",
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set_offset);
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set.clear();
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return;
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}
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const uint64_t cu_offset = set.getCompileUnitDIEOffset();
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for (const auto &desc : set.descriptors()) {
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if (desc.Length != 0)
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m_aranges.Append(
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RangeToDIE::Entry(desc.Address, desc.Length, cu_offset));
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}
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}
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}
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void DWARFDebugAranges::Dump(Log *log) const {
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if (log == nullptr)
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return;
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const size_t num_entries = m_aranges.GetSize();
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for (size_t i = 0; i < num_entries; ++i) {
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const RangeToDIE::Entry *entry = m_aranges.GetEntryAtIndex(i);
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if (entry)
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LLDB_LOG(log, "{0:x8}: [{1:x16} - {2:x16})", entry->data,
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entry->GetRangeBase(), entry->GetRangeEnd());
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}
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}
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void DWARFDebugAranges::AppendRange(dw_offset_t offset, dw_addr_t low_pc,
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dw_addr_t high_pc) {
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if (high_pc > low_pc)
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m_aranges.Append(RangeToDIE::Entry(low_pc, high_pc - low_pc, offset));
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}
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void DWARFDebugAranges::Sort(bool minimize) {
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LLDB_SCOPED_TIMER();
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m_aranges.Sort();
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m_aranges.CombineConsecutiveEntriesWithEqualData();
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}
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// FindAddress
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dw_offset_t DWARFDebugAranges::FindAddress(dw_addr_t address) const {
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const RangeToDIE::Entry *entry = m_aranges.FindEntryThatContains(address);
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if (entry)
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return entry->data;
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return DW_INVALID_OFFSET;
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}
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