contrib/llvm/tools/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp

   1 //===-- SymbolFileDWARFDwo.cpp ----------------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "SymbolFileDWARFDwo.h"
  11
  12 #include "lldb/Core/Section.h"
  13 #include "lldb/Expression/DWARFExpression.h"
  14 #include "lldb/Symbol/ObjectFile.h"
  15 #include "lldb/Utility/LLDBAssert.h"
  16
  17 #include "DWARFUnit.h"
  18 #include "DWARFDebugInfo.h"
  19
  20 using namespace lldb;
  21 using namespace lldb_private;
  22
  23 SymbolFileDWARFDwo::SymbolFileDWARFDwo(ObjectFileSP objfile,
  24                                        DWARFUnit *dwarf_cu)
  25     : SymbolFileDWARF(objfile.get()), m_obj_file_sp(objfile),
  26       m_base_dwarf_cu(dwarf_cu) {
  27   SetID(((lldb::user_id_t)dwarf_cu->GetOffset()) << 32);
  28 }
  29
  30 void SymbolFileDWARFDwo::LoadSectionData(lldb::SectionType sect_type,
  31                                          DWARFDataExtractor &data) {
  32   const SectionList *section_list =
  33       m_obj_file->GetSectionList(false /* update_module_section_list */);
  34   if (section_list) {
  35     SectionSP section_sp(section_list->FindSectionByType(sect_type, true));
  36     if (section_sp) {
  37       // See if we memory mapped the DWARF segment?
  38       if (m_dwarf_data.GetByteSize()) {
  39         data.SetData(m_dwarf_data, section_sp->GetOffset(),
  40                      section_sp->GetFileSize());
  41         return;
  42       }
  43
  44       if (m_obj_file->ReadSectionData(section_sp.get(), data) != 0)
  45         return;
  46
  47       data.Clear();
  48     }
  49   }
  50
  51   SymbolFileDWARF::LoadSectionData(sect_type, data);
  52 }
  53
  54 lldb::CompUnitSP
  55 SymbolFileDWARFDwo::ParseCompileUnit(DWARFUnit *dwarf_cu,
  56                                      uint32_t cu_idx) {
  57   assert(GetCompileUnit() == dwarf_cu && "SymbolFileDWARFDwo::ParseCompileUnit "
  58                                          "called with incompatible compile "
  59                                          "unit");
  60   return GetBaseSymbolFile()->ParseCompileUnit(m_base_dwarf_cu, UINT32_MAX);
  61 }
  62
  63 DWARFUnit *SymbolFileDWARFDwo::GetCompileUnit() {
  64   // Only dwo files with 1 compile unit is supported
  65   if (GetNumCompileUnits() == 1)
  66     return DebugInfo()->GetCompileUnitAtIndex(0);
  67   else
  68     return nullptr;
  69 }
  70
  71 DWARFUnit *
  72 SymbolFileDWARFDwo::GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit) {
  73   return GetCompileUnit();
  74 }
  75
  76 SymbolFileDWARF::DIEToTypePtr &SymbolFileDWARFDwo::GetDIEToType() {
  77   return GetBaseSymbolFile()->GetDIEToType();
  78 }
  79
  80 SymbolFileDWARF::DIEToVariableSP &SymbolFileDWARFDwo::GetDIEToVariable() {
  81   return GetBaseSymbolFile()->GetDIEToVariable();
  82 }
  83
  84 SymbolFileDWARF::DIEToClangType &
  85 SymbolFileDWARFDwo::GetForwardDeclDieToClangType() {
  86   return GetBaseSymbolFile()->GetForwardDeclDieToClangType();
  87 }
  88
  89 SymbolFileDWARF::ClangTypeToDIE &
  90 SymbolFileDWARFDwo::GetForwardDeclClangTypeToDie() {
  91   return GetBaseSymbolFile()->GetForwardDeclClangTypeToDie();
  92 }
  93
  94 size_t SymbolFileDWARFDwo::GetObjCMethodDIEOffsets(
  95     lldb_private::ConstString class_name, DIEArray &method_die_offsets) {
  96   return GetBaseSymbolFile()->GetObjCMethodDIEOffsets(
  97       class_name, method_die_offsets);
  98 }
  99
 100 UniqueDWARFASTTypeMap &SymbolFileDWARFDwo::GetUniqueDWARFASTTypeMap() {
 101   return GetBaseSymbolFile()->GetUniqueDWARFASTTypeMap();
 102 }
 103
 104 lldb::TypeSP SymbolFileDWARFDwo::FindDefinitionTypeForDWARFDeclContext(
 105     const DWARFDeclContext &die_decl_ctx) {
 106   return GetBaseSymbolFile()->FindDefinitionTypeForDWARFDeclContext(
 107       die_decl_ctx);
 108 }
 109
 110 lldb::TypeSP SymbolFileDWARFDwo::FindCompleteObjCDefinitionTypeForDIE(
 111     const DWARFDIE &die, const lldb_private::ConstString &type_name,
 112     bool must_be_implementation) {
 113   return GetBaseSymbolFile()->FindCompleteObjCDefinitionTypeForDIE(
 114       die, type_name, must_be_implementation);
 115 }
 116
 117 DWARFUnit *SymbolFileDWARFDwo::GetBaseCompileUnit() {
 118   return m_base_dwarf_cu;
 119 }
 120
 121 const DWARFDataExtractor &SymbolFileDWARFDwo::get_debug_abbrev_data() {
 122   return GetCachedSectionData(eSectionTypeDWARFDebugAbbrevDwo,
 123                               m_data_debug_abbrev);
 124 }
 125
 126 const DWARFDataExtractor &SymbolFileDWARFDwo::get_debug_addr_data() {
 127   // For single file split dwarf case (when we have .dwo sections in a .o),
 128   // we do not want to use the .debug_addr section from .o file,
 129   // but want to get one from the final executable.
 130   // For regular split debug case, .dwo file does not contain the
 131   // .debug_addr, so we would always fall back to such lookup anyways.
 132   llvm::call_once(m_data_debug_addr.m_flag, [this] {
 133     SymbolFileDWARF::LoadSectionData(eSectionTypeDWARFDebugAddr,
 134                                      std::ref(m_data_debug_addr.m_data));
 135   });
 136   return m_data_debug_addr.m_data;
 137 }
 138
 139 const DWARFDataExtractor &SymbolFileDWARFDwo::get_debug_info_data() {
 140   return GetCachedSectionData(eSectionTypeDWARFDebugInfoDwo, m_data_debug_info);
 141 }
 142
 143 const DWARFDataExtractor &SymbolFileDWARFDwo::get_debug_str_data() {
 144   return GetCachedSectionData(eSectionTypeDWARFDebugStrDwo, m_data_debug_str);
 145 }
 146
 147 const DWARFDataExtractor &SymbolFileDWARFDwo::get_debug_str_offsets_data() {
 148   return GetCachedSectionData(eSectionTypeDWARFDebugStrOffsetsDwo,
 149                               m_data_debug_str_offsets);
 150 }
 151
 152 SymbolFileDWARF *SymbolFileDWARFDwo::GetBaseSymbolFile() {
 153   return m_base_dwarf_cu->GetSymbolFileDWARF();
 154 }
 155
 156 DWARFExpression::LocationListFormat
 157 SymbolFileDWARFDwo::GetLocationListFormat() const {
 158   return DWARFExpression::SplitDwarfLocationList;
 159 }
 160
 161 TypeSystem *
 162 SymbolFileDWARFDwo::GetTypeSystemForLanguage(LanguageType language) {
 163   return GetBaseSymbolFile()->GetTypeSystemForLanguage(language);
 164 }
 165
 166 DWARFDIE
 167 SymbolFileDWARFDwo::GetDIE(const DIERef &die_ref) {
 168   lldbassert(m_base_dwarf_cu->GetOffset() == die_ref.cu_offset);
 169   return DebugInfo()->GetDIEForDIEOffset(die_ref.die_offset);
 170 }