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 "DWARFCompileUnit.h"
  18 #include "DWARFDebugInfo.h"
  19
  20 using namespace lldb;
  21 using namespace lldb_private;
  22
  23 SymbolFileDWARFDwo::SymbolFileDWARFDwo(ObjectFileSP objfile,
  24                                        DWARFCompileUnit *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(DWARFCompileUnit *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 DWARFCompileUnit *SymbolFileDWARFDwo::GetCompileUnit() {
  64   // A clang module is found via a skeleton CU, but is not a proper DWO.
  65   // Clang modules have a .debug_info section instead of the *_dwo variant.
  66   if (auto *section_list = m_obj_file->GetSectionList(false))
  67     if (auto section_sp =
  68             section_list->FindSectionByType(eSectionTypeDWARFDebugInfo, true))
  69       if (!section_sp->GetName().GetStringRef().endswith("dwo"))
  70         return nullptr;
  71
  72   // Only dwo files with 1 compile unit is supported
  73   if (GetNumCompileUnits() == 1)
  74     return DebugInfo()->GetCompileUnitAtIndex(0);
  75   else
  76     return nullptr;
  77 }
  78
  79 DWARFCompileUnit *
  80 SymbolFileDWARFDwo::GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit) {
  81   return GetCompileUnit();
  82 }
  83
  84 SymbolFileDWARF::DIEToTypePtr &SymbolFileDWARFDwo::GetDIEToType() {
  85   return GetBaseSymbolFile()->GetDIEToType();
  86 }
  87
  88 SymbolFileDWARF::DIEToVariableSP &SymbolFileDWARFDwo::GetDIEToVariable() {
  89   return GetBaseSymbolFile()->GetDIEToVariable();
  90 }
  91
  92 SymbolFileDWARF::DIEToClangType &
  93 SymbolFileDWARFDwo::GetForwardDeclDieToClangType() {
  94   return GetBaseSymbolFile()->GetForwardDeclDieToClangType();
  95 }
  96
  97 SymbolFileDWARF::ClangTypeToDIE &
  98 SymbolFileDWARFDwo::GetForwardDeclClangTypeToDie() {
  99   return GetBaseSymbolFile()->GetForwardDeclClangTypeToDie();
 100 }
 101
 102 size_t SymbolFileDWARFDwo::GetObjCMethodDIEOffsets(
 103     lldb_private::ConstString class_name, DIEArray &method_die_offsets) {
 104   return GetBaseSymbolFile()->GetObjCMethodDIEOffsets(
 105       class_name, method_die_offsets);
 106 }
 107
 108 UniqueDWARFASTTypeMap &SymbolFileDWARFDwo::GetUniqueDWARFASTTypeMap() {
 109   return GetBaseSymbolFile()->GetUniqueDWARFASTTypeMap();
 110 }
 111
 112 lldb::TypeSP SymbolFileDWARFDwo::FindDefinitionTypeForDWARFDeclContext(
 113     const DWARFDeclContext &die_decl_ctx) {
 114   return GetBaseSymbolFile()->FindDefinitionTypeForDWARFDeclContext(
 115       die_decl_ctx);
 116 }
 117
 118 lldb::TypeSP SymbolFileDWARFDwo::FindCompleteObjCDefinitionTypeForDIE(
 119     const DWARFDIE &die, const lldb_private::ConstString &type_name,
 120     bool must_be_implementation) {
 121   return GetBaseSymbolFile()->FindCompleteObjCDefinitionTypeForDIE(
 122       die, type_name, must_be_implementation);
 123 }
 124
 125 DWARFCompileUnit *SymbolFileDWARFDwo::GetBaseCompileUnit() {
 126   return m_base_dwarf_cu;
 127 }
 128
 129 SymbolFileDWARF *SymbolFileDWARFDwo::GetBaseSymbolFile() {
 130   return m_base_dwarf_cu->GetSymbolFileDWARF();
 131 }
 132
 133 DWARFExpression::LocationListFormat
 134 SymbolFileDWARFDwo::GetLocationListFormat() const {
 135   return DWARFExpression::SplitDwarfLocationList;
 136 }
 137
 138 TypeSystem *
 139 SymbolFileDWARFDwo::GetTypeSystemForLanguage(LanguageType language) {
 140   return GetBaseSymbolFile()->GetTypeSystemForLanguage(language);
 141 }
 142
 143 DWARFDIE
 144 SymbolFileDWARFDwo::GetDIE(const DIERef &die_ref) {
 145   lldbassert(m_base_dwarf_cu->GetOffset() == die_ref.cu_offset);
 146   return DebugInfo()->GetDIEForDIEOffset(die_ref.die_offset);
 147 }