diff options
Diffstat (limited to 'lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwp.cpp')
| -rw-r--r-- | lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwp.cpp | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwp.cpp b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwp.cpp new file mode 100644 index 000000000000..08e6e1c8c2f3 --- /dev/null +++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwp.cpp @@ -0,0 +1,138 @@ +//===-- SymbolFileDWARFDwp.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 "SymbolFileDWARFDwp.h" + +#include "lldb/Core/Section.h" +#include "lldb/Symbol/ObjectFile.h" + +#include "SymbolFileDWARFDwoDwp.h" + +static llvm::DWARFSectionKind +lldbSectTypeToLlvmSectionKind(lldb::SectionType type) { + switch (type) { + case lldb::eSectionTypeDWARFDebugInfo: + return llvm::DW_SECT_INFO; + // case lldb::eSectionTypeDWARFDebugTypes: + // return llvm::DW_SECT_TYPES; + case lldb::eSectionTypeDWARFDebugAbbrev: + return llvm::DW_SECT_ABBREV; + case lldb::eSectionTypeDWARFDebugLine: + return llvm::DW_SECT_LINE; + case lldb::eSectionTypeDWARFDebugLoc: + return llvm::DW_SECT_LOC; + case lldb::eSectionTypeDWARFDebugStrOffsets: + return llvm::DW_SECT_STR_OFFSETS; + // case lldb::eSectionTypeDWARFDebugMacinfo: + // return llvm::DW_SECT_MACINFO; + case lldb::eSectionTypeDWARFDebugMacro: + return llvm::DW_SECT_MACRO; + default: + // Note: 0 is an invalid dwarf section kind. + return llvm::DWARFSectionKind(0); + } +} + +std::unique_ptr<SymbolFileDWARFDwp> +SymbolFileDWARFDwp::Create(lldb::ModuleSP module_sp, + const lldb_private::FileSpec &file_spec) { + const lldb::offset_t file_offset = 0; + lldb::DataBufferSP file_data_sp; + lldb::offset_t file_data_offset = 0; + lldb::ObjectFileSP obj_file = lldb_private::ObjectFile::FindPlugin( + module_sp, &file_spec, file_offset, + lldb_private::FileSystem::Instance().GetByteSize(file_spec), file_data_sp, + file_data_offset); + if (obj_file == nullptr) + return nullptr; + + std::unique_ptr<SymbolFileDWARFDwp> dwp_symfile( + new SymbolFileDWARFDwp(module_sp, obj_file)); + + lldb_private::DWARFDataExtractor debug_cu_index; + if (!dwp_symfile->LoadRawSectionData(lldb::eSectionTypeDWARFDebugCuIndex, + debug_cu_index)) + return nullptr; + + llvm::DataExtractor llvm_debug_cu_index( + llvm::StringRef(debug_cu_index.PeekCStr(0), debug_cu_index.GetByteSize()), + debug_cu_index.GetByteOrder() == lldb::eByteOrderLittle, + debug_cu_index.GetAddressByteSize()); + if (!dwp_symfile->m_debug_cu_index.parse(llvm_debug_cu_index)) + return nullptr; + dwp_symfile->InitDebugCUIndexMap(); + return dwp_symfile; +} + +void SymbolFileDWARFDwp::InitDebugCUIndexMap() { + m_debug_cu_index_map.clear(); + for (const auto &entry : m_debug_cu_index.getRows()) + m_debug_cu_index_map.emplace(entry.getSignature(), &entry); +} + +SymbolFileDWARFDwp::SymbolFileDWARFDwp(lldb::ModuleSP module_sp, + lldb::ObjectFileSP obj_file) + : m_obj_file(std::move(obj_file)), m_debug_cu_index(llvm::DW_SECT_INFO) +{} + +std::unique_ptr<SymbolFileDWARFDwo> +SymbolFileDWARFDwp::GetSymbolFileForDwoId(DWARFCompileUnit &dwarf_cu, + uint64_t dwo_id) { + return std::unique_ptr<SymbolFileDWARFDwo>( + new SymbolFileDWARFDwoDwp(this, m_obj_file, dwarf_cu, dwo_id)); +} + +bool SymbolFileDWARFDwp::LoadSectionData( + uint64_t dwo_id, lldb::SectionType sect_type, + lldb_private::DWARFDataExtractor &data) { + lldb_private::DWARFDataExtractor section_data; + if (!LoadRawSectionData(sect_type, section_data)) + return false; + + auto it = m_debug_cu_index_map.find(dwo_id); + if (it == m_debug_cu_index_map.end()) + return false; + + auto *offsets = + it->second->getOffset(lldbSectTypeToLlvmSectionKind(sect_type)); + if (offsets) { + data.SetData(section_data, offsets->Offset, offsets->Length); + } else { + data.SetData(section_data, 0, section_data.GetByteSize()); + } + return true; +} + +bool SymbolFileDWARFDwp::LoadRawSectionData( + lldb::SectionType sect_type, lldb_private::DWARFDataExtractor &data) { + std::lock_guard<std::mutex> lock(m_sections_mutex); + + auto it = m_sections.find(sect_type); + if (it != m_sections.end()) { + if (it->second.GetByteSize() == 0) + return false; + + data = it->second; + return true; + } + + const lldb_private::SectionList *section_list = + m_obj_file->GetSectionList(false /* update_module_section_list */); + if (section_list) { + lldb::SectionSP section_sp( + section_list->FindSectionByType(sect_type, true)); + if (section_sp) { + if (m_obj_file->ReadSectionData(section_sp.get(), data) != 0) { + m_sections[sect_type] = data; + return true; + } + } + } + m_sections[sect_type].Clear(); + return false; +} |