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