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
SymbolFileDWARFDwo(ObjectFileSP objfile,DWARFUnit * dwarf_cu)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
LoadSectionData(lldb::SectionType sect_type,DWARFDataExtractor & data)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
ParseCompileUnit(DWARFUnit * dwarf_cu,uint32_t cu_idx)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
GetCompileUnit()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 *
GetDWARFCompileUnit(lldb_private::CompileUnit * comp_unit)72 SymbolFileDWARFDwo::GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit) {
73 return GetCompileUnit();
74 }
75
GetDIEToType()76 SymbolFileDWARF::DIEToTypePtr &SymbolFileDWARFDwo::GetDIEToType() {
77 return GetBaseSymbolFile()->GetDIEToType();
78 }
79
GetDIEToVariable()80 SymbolFileDWARF::DIEToVariableSP &SymbolFileDWARFDwo::GetDIEToVariable() {
81 return GetBaseSymbolFile()->GetDIEToVariable();
82 }
83
84 SymbolFileDWARF::DIEToClangType &
GetForwardDeclDieToClangType()85 SymbolFileDWARFDwo::GetForwardDeclDieToClangType() {
86 return GetBaseSymbolFile()->GetForwardDeclDieToClangType();
87 }
88
89 SymbolFileDWARF::ClangTypeToDIE &
GetForwardDeclClangTypeToDie()90 SymbolFileDWARFDwo::GetForwardDeclClangTypeToDie() {
91 return GetBaseSymbolFile()->GetForwardDeclClangTypeToDie();
92 }
93
GetObjCMethodDIEOffsets(lldb_private::ConstString class_name,DIEArray & method_die_offsets)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
GetUniqueDWARFASTTypeMap()100 UniqueDWARFASTTypeMap &SymbolFileDWARFDwo::GetUniqueDWARFASTTypeMap() {
101 return GetBaseSymbolFile()->GetUniqueDWARFASTTypeMap();
102 }
103
FindDefinitionTypeForDWARFDeclContext(const DWARFDeclContext & die_decl_ctx)104 lldb::TypeSP SymbolFileDWARFDwo::FindDefinitionTypeForDWARFDeclContext(
105 const DWARFDeclContext &die_decl_ctx) {
106 return GetBaseSymbolFile()->FindDefinitionTypeForDWARFDeclContext(
107 die_decl_ctx);
108 }
109
FindCompleteObjCDefinitionTypeForDIE(const DWARFDIE & die,const lldb_private::ConstString & type_name,bool must_be_implementation)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
GetBaseCompileUnit()117 DWARFUnit *SymbolFileDWARFDwo::GetBaseCompileUnit() {
118 return m_base_dwarf_cu;
119 }
120
get_debug_abbrev_data()121 const DWARFDataExtractor &SymbolFileDWARFDwo::get_debug_abbrev_data() {
122 return GetCachedSectionData(eSectionTypeDWARFDebugAbbrevDwo,
123 m_data_debug_abbrev);
124 }
125
get_debug_addr_data()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
get_debug_info_data()139 const DWARFDataExtractor &SymbolFileDWARFDwo::get_debug_info_data() {
140 return GetCachedSectionData(eSectionTypeDWARFDebugInfoDwo, m_data_debug_info);
141 }
142
get_debug_str_data()143 const DWARFDataExtractor &SymbolFileDWARFDwo::get_debug_str_data() {
144 return GetCachedSectionData(eSectionTypeDWARFDebugStrDwo, m_data_debug_str);
145 }
146
get_debug_str_offsets_data()147 const DWARFDataExtractor &SymbolFileDWARFDwo::get_debug_str_offsets_data() {
148 return GetCachedSectionData(eSectionTypeDWARFDebugStrOffsetsDwo,
149 m_data_debug_str_offsets);
150 }
151
GetBaseSymbolFile()152 SymbolFileDWARF *SymbolFileDWARFDwo::GetBaseSymbolFile() {
153 return m_base_dwarf_cu->GetSymbolFileDWARF();
154 }
155
156 DWARFExpression::LocationListFormat
GetLocationListFormat() const157 SymbolFileDWARFDwo::GetLocationListFormat() const {
158 return DWARFExpression::SplitDwarfLocationList;
159 }
160
161 TypeSystem *
GetTypeSystemForLanguage(LanguageType language)162 SymbolFileDWARFDwo::GetTypeSystemForLanguage(LanguageType language) {
163 return GetBaseSymbolFile()->GetTypeSystemForLanguage(language);
164 }
165
166 DWARFDIE
GetDIE(const DIERef & die_ref)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 }
171