2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
139 lines
4.6 KiB
C++
139 lines
4.6 KiB
C++
//===-- SymbolFileDWARFDwp.cpp ----------------------------------*- C++ -*-===//
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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 "SymbolFileDWARFDwp.h"
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#include "lldb/Core/Section.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "SymbolFileDWARFDwoDwp.h"
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static llvm::DWARFSectionKind
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lldbSectTypeToLlvmSectionKind(lldb::SectionType type) {
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switch (type) {
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case lldb::eSectionTypeDWARFDebugInfo:
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return llvm::DW_SECT_INFO;
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// case lldb::eSectionTypeDWARFDebugTypes:
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// return llvm::DW_SECT_TYPES;
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case lldb::eSectionTypeDWARFDebugAbbrev:
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return llvm::DW_SECT_ABBREV;
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case lldb::eSectionTypeDWARFDebugLine:
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return llvm::DW_SECT_LINE;
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case lldb::eSectionTypeDWARFDebugLoc:
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return llvm::DW_SECT_LOC;
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case lldb::eSectionTypeDWARFDebugStrOffsets:
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return llvm::DW_SECT_STR_OFFSETS;
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// case lldb::eSectionTypeDWARFDebugMacinfo:
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// return llvm::DW_SECT_MACINFO;
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case lldb::eSectionTypeDWARFDebugMacro:
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return llvm::DW_SECT_MACRO;
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default:
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// Note: 0 is an invalid dwarf section kind.
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return llvm::DWARFSectionKind(0);
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}
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}
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std::unique_ptr<SymbolFileDWARFDwp>
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SymbolFileDWARFDwp::Create(lldb::ModuleSP module_sp,
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const lldb_private::FileSpec &file_spec) {
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const lldb::offset_t file_offset = 0;
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lldb::DataBufferSP file_data_sp;
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lldb::offset_t file_data_offset = 0;
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lldb::ObjectFileSP obj_file = lldb_private::ObjectFile::FindPlugin(
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module_sp, &file_spec, file_offset,
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lldb_private::FileSystem::Instance().GetByteSize(file_spec), file_data_sp,
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file_data_offset);
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if (obj_file == nullptr)
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return nullptr;
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std::unique_ptr<SymbolFileDWARFDwp> dwp_symfile(
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new SymbolFileDWARFDwp(module_sp, obj_file));
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lldb_private::DWARFDataExtractor debug_cu_index;
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if (!dwp_symfile->LoadRawSectionData(lldb::eSectionTypeDWARFDebugCuIndex,
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debug_cu_index))
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return nullptr;
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llvm::DataExtractor llvm_debug_cu_index(
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llvm::StringRef(debug_cu_index.PeekCStr(0), debug_cu_index.GetByteSize()),
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debug_cu_index.GetByteOrder() == lldb::eByteOrderLittle,
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debug_cu_index.GetAddressByteSize());
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if (!dwp_symfile->m_debug_cu_index.parse(llvm_debug_cu_index))
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return nullptr;
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dwp_symfile->InitDebugCUIndexMap();
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return dwp_symfile;
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}
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void SymbolFileDWARFDwp::InitDebugCUIndexMap() {
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m_debug_cu_index_map.clear();
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for (const auto &entry : m_debug_cu_index.getRows())
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m_debug_cu_index_map.emplace(entry.getSignature(), &entry);
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}
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SymbolFileDWARFDwp::SymbolFileDWARFDwp(lldb::ModuleSP module_sp,
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lldb::ObjectFileSP obj_file)
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: m_obj_file(std::move(obj_file)), m_debug_cu_index(llvm::DW_SECT_INFO)
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{}
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std::unique_ptr<SymbolFileDWARFDwo>
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SymbolFileDWARFDwp::GetSymbolFileForDwoId(DWARFUnit *dwarf_cu,
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uint64_t dwo_id) {
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return std::unique_ptr<SymbolFileDWARFDwo>(
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new SymbolFileDWARFDwoDwp(this, m_obj_file, dwarf_cu, dwo_id));
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}
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bool SymbolFileDWARFDwp::LoadSectionData(
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uint64_t dwo_id, lldb::SectionType sect_type,
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lldb_private::DWARFDataExtractor &data) {
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lldb_private::DWARFDataExtractor section_data;
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if (!LoadRawSectionData(sect_type, section_data))
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return false;
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auto it = m_debug_cu_index_map.find(dwo_id);
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if (it == m_debug_cu_index_map.end())
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return false;
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auto *offsets =
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it->second->getOffset(lldbSectTypeToLlvmSectionKind(sect_type));
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if (offsets) {
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data.SetData(section_data, offsets->Offset, offsets->Length);
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} else {
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data.SetData(section_data, 0, section_data.GetByteSize());
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}
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return true;
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}
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bool SymbolFileDWARFDwp::LoadRawSectionData(
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lldb::SectionType sect_type, lldb_private::DWARFDataExtractor &data) {
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std::lock_guard<std::mutex> lock(m_sections_mutex);
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auto it = m_sections.find(sect_type);
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if (it != m_sections.end()) {
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if (it->second.GetByteSize() == 0)
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return false;
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data = it->second;
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return true;
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}
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const lldb_private::SectionList *section_list =
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m_obj_file->GetSectionList(false /* update_module_section_list */);
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if (section_list) {
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lldb::SectionSP section_sp(
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section_list->FindSectionByType(sect_type, true));
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if (section_sp) {
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if (m_obj_file->ReadSectionData(section_sp.get(), data) != 0) {
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m_sections[sect_type] = data;
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return true;
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}
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}
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}
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m_sections[sect_type].Clear();
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return false;
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}
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