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//===-- DWARFContext.cpp ----------------------------------------*- C++ -*-===//
//
// 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 "DWARFContext.h"
#include "lldb/Core/Section.h"
using namespace lldb;
using namespace lldb_private;
static const DWARFDataExtractor *
GetPointerOrNull(const llvm::Optional<DWARFDataExtractor> &extractor) {
if (!extractor.hasValue())
return nullptr;
return extractor.getPointer();
}
static const DWARFDataExtractor *
LoadOrGetSection(Module &module, SectionType section_type,
llvm::Optional<DWARFDataExtractor> &extractor) {
if (extractor.hasValue())
return extractor->GetByteSize() > 0 ? extractor.getPointer() : nullptr;
// Initialize to an empty extractor so that we always take the fast path going
// forward.
extractor.emplace();
const SectionList *section_list = module.GetSectionList();
if (!section_list)
return nullptr;
auto section_sp = section_list->FindSectionByType(section_type, true);
if (!section_sp)
return nullptr;
section_sp->GetSectionData(*extractor);
return extractor.getPointer();
}
DWARFContext::DWARFContext(Module &module) : m_module(module) {}
const DWARFDataExtractor *DWARFContext::getOrLoadArangesData() {
return LoadOrGetSection(m_module, eSectionTypeDWARFDebugAranges,
m_data_debug_aranges);
}
const DWARFDataExtractor *DWARFContext::getOrLoadDebugLineData() {
return LoadOrGetSection(m_module, eSectionTypeDWARFDebugLine,
m_data_debug_line);
}
const DWARFDataExtractor *DWARFContext::getOrLoadDebugLineStrData() {
return LoadOrGetSection(m_module, eSectionTypeDWARFDebugLineStr,
m_data_debug_line_str);
}
const DWARFDataExtractor *DWARFContext::getOrLoadDebugMacroData() {
return LoadOrGetSection(m_module, eSectionTypeDWARFDebugMacro,
m_data_debug_macro);
}
const DWARFDataExtractor *DWARFContext::getOrLoadDebugLocData() {
return LoadOrGetSection(m_module, eSectionTypeDWARFDebugLoc,
m_data_debug_loc);
}
const DWARFDataExtractor *DWARFContext::getOrLoadDebugLoclistData() {
return LoadOrGetSection(m_module, eSectionTypeDWARFDebugLocLists,
m_data_debug_loclists);
}
const DWARFDataExtractor *DWARFContext::getOrLoadDebugRangesData() {
return LoadOrGetSection(m_module, eSectionTypeDWARFDebugRanges,
m_data_debug_ranges);
}
const DWARFDataExtractor *DWARFContext::getOrLoadDebugRnglistsData() {
return LoadOrGetSection(m_module, eSectionTypeDWARFDebugRngLists,
m_data_debug_rnglists);
}
const DWARFDataExtractor *DWARFContext::getOrLoadDebugFrameData() {
return LoadOrGetSection(m_module, eSectionTypeDWARFDebugFrame,
m_data_debug_frame);
}
const DWARFDataExtractor *DWARFContext::getOrLoadDebugTypesData() {
return LoadOrGetSection(m_module, eSectionTypeDWARFDebugTypes,
m_data_debug_types);
}
const DWARFDataExtractor *DWARFContext::getOrLoadGnuDebugAltlinkData() {
return LoadOrGetSection(m_module, eSectionTypeDWARFGNUDebugAltLink,
m_data_gnu_debug_altlink);
}
const DWARFDataExtractor *DWARFContext::getOrLoadBestDebugLocData() {
const DWARFDataExtractor *loc = getOrLoadDebugLocData();
if (loc)
return loc;
return getOrLoadDebugLoclistData();
}
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