148 lines
5.3 KiB
C++
148 lines
5.3 KiB
C++
//===-- DWARFContext.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 "DWARFContext.h"
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#include "lldb/Core/Section.h"
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using namespace lldb;
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using namespace lldb_private;
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static DWARFDataExtractor LoadSection(SectionList *section_list,
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SectionType section_type) {
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if (!section_list)
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return DWARFDataExtractor();
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auto section_sp = section_list->FindSectionByType(section_type, true);
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if (!section_sp)
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return DWARFDataExtractor();
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DWARFDataExtractor data;
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section_sp->GetSectionData(data);
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return data;
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}
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const DWARFDataExtractor &
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DWARFContext::LoadOrGetSection(llvm::Optional<SectionType> main_section_type,
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llvm::Optional<SectionType> dwo_section_type,
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SectionData &data) {
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llvm::call_once(data.flag, [&] {
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if (dwo_section_type && isDwo())
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data.data = LoadSection(m_dwo_section_list, *dwo_section_type);
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else if (main_section_type)
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data.data = LoadSection(m_main_section_list, *main_section_type);
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});
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return data.data;
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}
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const DWARFDataExtractor &DWARFContext::getOrLoadCuIndexData() {
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return LoadOrGetSection(llvm::None, eSectionTypeDWARFDebugCuIndex,
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m_data_debug_cu_index);
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}
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const DWARFDataExtractor &DWARFContext::getOrLoadTuIndexData() {
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return LoadOrGetSection(llvm::None, eSectionTypeDWARFDebugTuIndex,
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m_data_debug_tu_index);
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}
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const DWARFDataExtractor &DWARFContext::getOrLoadAbbrevData() {
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return LoadOrGetSection(eSectionTypeDWARFDebugAbbrev,
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eSectionTypeDWARFDebugAbbrevDwo, m_data_debug_abbrev);
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}
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const DWARFDataExtractor &DWARFContext::getOrLoadArangesData() {
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return LoadOrGetSection(eSectionTypeDWARFDebugAranges, llvm::None,
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m_data_debug_aranges);
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}
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const DWARFDataExtractor &DWARFContext::getOrLoadAddrData() {
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return LoadOrGetSection(eSectionTypeDWARFDebugAddr, llvm::None,
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m_data_debug_addr);
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}
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const DWARFDataExtractor &DWARFContext::getOrLoadDebugInfoData() {
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return LoadOrGetSection(eSectionTypeDWARFDebugInfo,
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eSectionTypeDWARFDebugInfoDwo, m_data_debug_info);
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}
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const DWARFDataExtractor &DWARFContext::getOrLoadLineData() {
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return LoadOrGetSection(eSectionTypeDWARFDebugLine, llvm::None,
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m_data_debug_line);
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}
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const DWARFDataExtractor &DWARFContext::getOrLoadLineStrData() {
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return LoadOrGetSection(eSectionTypeDWARFDebugLineStr, llvm::None,
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m_data_debug_line_str);
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}
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const DWARFDataExtractor &DWARFContext::getOrLoadLocData() {
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return LoadOrGetSection(eSectionTypeDWARFDebugLoc,
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eSectionTypeDWARFDebugLocDwo, m_data_debug_loc);
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}
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const DWARFDataExtractor &DWARFContext::getOrLoadLocListsData() {
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return LoadOrGetSection(eSectionTypeDWARFDebugLocLists,
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eSectionTypeDWARFDebugLocListsDwo,
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m_data_debug_loclists);
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}
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const DWARFDataExtractor &DWARFContext::getOrLoadMacroData() {
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return LoadOrGetSection(eSectionTypeDWARFDebugMacro, llvm::None,
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m_data_debug_macro);
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}
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const DWARFDataExtractor &DWARFContext::getOrLoadRangesData() {
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return LoadOrGetSection(eSectionTypeDWARFDebugRanges, llvm::None,
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m_data_debug_ranges);
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}
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const DWARFDataExtractor &DWARFContext::getOrLoadRngListsData() {
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return LoadOrGetSection(eSectionTypeDWARFDebugRngLists,
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eSectionTypeDWARFDebugRngListsDwo,
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m_data_debug_rnglists);
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}
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const DWARFDataExtractor &DWARFContext::getOrLoadStrData() {
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return LoadOrGetSection(eSectionTypeDWARFDebugStr,
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eSectionTypeDWARFDebugStrDwo, m_data_debug_str);
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}
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const DWARFDataExtractor &DWARFContext::getOrLoadStrOffsetsData() {
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return LoadOrGetSection(eSectionTypeDWARFDebugStrOffsets,
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eSectionTypeDWARFDebugStrOffsetsDwo,
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m_data_debug_str_offsets);
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}
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const DWARFDataExtractor &DWARFContext::getOrLoadDebugTypesData() {
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return LoadOrGetSection(eSectionTypeDWARFDebugTypes,
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eSectionTypeDWARFDebugTypesDwo, m_data_debug_types);
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}
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llvm::DWARFContext &DWARFContext::GetAsLLVM() {
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if (!m_llvm_context) {
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llvm::StringMap<std::unique_ptr<llvm::MemoryBuffer>> section_map;
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uint8_t addr_size = 0;
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auto AddSection = [&](llvm::StringRef name, DWARFDataExtractor data) {
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// Set the address size the first time we see it.
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if (addr_size == 0)
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addr_size = data.GetAddressByteSize();
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section_map.try_emplace(
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name, llvm::MemoryBuffer::getMemBuffer(toStringRef(data.GetData()),
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name, false));
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};
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AddSection("debug_line_str", getOrLoadLineStrData());
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AddSection("debug_cu_index", getOrLoadCuIndexData());
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AddSection("debug_tu_index", getOrLoadTuIndexData());
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m_llvm_context = llvm::DWARFContext::create(section_map, addr_size);
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}
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return *m_llvm_context;
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}
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