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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 "DWARFDebugArangeSet.h"
#include "DWARFUnit.h"
#include "LogChannelDWARF.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/Timer.h"
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::plugin::dwarf;
// Constructor
DWARFDebugAranges::DWARFDebugAranges() : m_aranges() {}
// CountArangeDescriptors
class CountArangeDescriptors {
public:
CountArangeDescriptors(uint32_t &count_ref) : count(count_ref) {
// printf("constructor CountArangeDescriptors()\n");
}
void operator()(const DWARFDebugArangeSet &set) {
count += set.NumDescriptors();
}
uint32_t &count;
};
// Extract
void DWARFDebugAranges::extract(const DWARFDataExtractor &debug_aranges_data) {
lldb::offset_t offset = 0;
DWARFDebugArangeSet set;
Range range;
while (debug_aranges_data.ValidOffset(offset)) {
const lldb::offset_t set_offset = offset;
if (llvm::Error error = set.extract(debug_aranges_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);
} else {
const uint32_t num_descriptors = set.NumDescriptors();
if (num_descriptors > 0) {
const dw_offset_t cu_offset = set.GetHeader().cu_offset;
for (uint32_t i = 0; i < num_descriptors; ++i) {
const DWARFDebugArangeSet::Descriptor &descriptor =
set.GetDescriptorRef(i);
m_aranges.Append(RangeToDIE::Entry(descriptor.address,
descriptor.length, cu_offset));
}
}
}
// Always use the previous DWARFDebugArangeSet's information to calculate
// the offset of the next DWARFDebugArangeSet in case we entouncter an
// error in the current DWARFDebugArangeSet and our offset position is
// still in the middle of the data. If we do this, we can parse all valid
// DWARFDebugArangeSet objects without returning invalid errors.
offset = set.GetNextOffset();
set.Clear();
}
}
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_TIMERF("%s this = %p", LLVM_PRETTY_FUNCTION,
static_cast<void *>(this));
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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