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