ceff6644bb
This patch removes the comments grouping header includes. They were added after running IWYU over the LLDB codebase. However they add little value, are often outdates and burdensome to maintain. llvm-svn: 346626
140 lines
4.6 KiB
C++
140 lines
4.6 KiB
C++
//===-- SymbolFileDWARFDwp.cpp ----------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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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