1 //===-- DWARFBaseDIE.cpp ---------------------------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "DWARFBaseDIE.h"
10 
11 #include "DWARFUnit.h"
12 #include "DWARFDebugInfoEntry.h"
13 #include "SymbolFileDWARF.h"
14 
15 #include "lldb/Core/Module.h"
16 #include "lldb/Symbol/ObjectFile.h"
17 
18 using namespace lldb_private;
19 
20 DIERef DWARFBaseDIE::GetDIERef() const {
21   if (!IsValid())
22     return DIERef();
23 
24   dw_offset_t cu_offset = m_cu->GetOffset();
25   if (m_cu->GetBaseObjOffset() != DW_INVALID_OFFSET)
26     cu_offset = m_cu->GetBaseObjOffset();
27   return DIERef(m_cu->GetDebugSection(), cu_offset, m_die->GetOffset());
28 }
29 
30 dw_tag_t DWARFBaseDIE::Tag() const {
31   if (m_die)
32     return m_die->Tag();
33   else
34     return 0;
35 }
36 
37 const char *DWARFBaseDIE::GetTagAsCString() const {
38   return lldb_private::DW_TAG_value_to_name(Tag());
39 }
40 
41 const char *DWARFBaseDIE::GetAttributeValueAsString(const dw_attr_t attr,
42                                                 const char *fail_value) const {
43   if (IsValid())
44     return m_die->GetAttributeValueAsString(GetCU(), attr, fail_value);
45   else
46     return fail_value;
47 }
48 
49 uint64_t DWARFBaseDIE::GetAttributeValueAsUnsigned(const dw_attr_t attr,
50                                                uint64_t fail_value) const {
51   if (IsValid())
52     return m_die->GetAttributeValueAsUnsigned(GetCU(), attr, fail_value);
53   else
54     return fail_value;
55 }
56 
57 uint64_t DWARFBaseDIE::GetAttributeValueAsAddress(const dw_attr_t attr,
58                                               uint64_t fail_value) const {
59   if (IsValid())
60     return m_die->GetAttributeValueAsAddress(GetCU(), attr, fail_value);
61   else
62     return fail_value;
63 }
64 
65 lldb::user_id_t DWARFBaseDIE::GetID() const {
66   if (IsValid())
67     return GetDWARF()->GetUID(*this);
68   return LLDB_INVALID_UID;
69 }
70 
71 const char *DWARFBaseDIE::GetName() const {
72   if (IsValid())
73     return m_die->GetName(m_cu);
74   else
75     return nullptr;
76 }
77 
78 lldb::LanguageType DWARFBaseDIE::GetLanguage() const {
79   if (IsValid())
80     return m_cu->GetLanguageType();
81   else
82     return lldb::eLanguageTypeUnknown;
83 }
84 
85 lldb::ModuleSP DWARFBaseDIE::GetModule() const {
86   SymbolFileDWARF *dwarf = GetDWARF();
87   if (dwarf)
88     return dwarf->GetObjectFile()->GetModule();
89   else
90     return lldb::ModuleSP();
91 }
92 
93 dw_offset_t DWARFBaseDIE::GetOffset() const {
94   if (IsValid())
95     return m_die->GetOffset();
96   else
97     return DW_INVALID_OFFSET;
98 }
99 
100 SymbolFileDWARF *DWARFBaseDIE::GetDWARF() const {
101   if (m_cu)
102     return m_cu->GetSymbolFileDWARF();
103   else
104     return nullptr;
105 }
106 
107 lldb_private::TypeSystem *DWARFBaseDIE::GetTypeSystem() const {
108   if (m_cu)
109     return m_cu->GetTypeSystem();
110   else
111     return nullptr;
112 }
113 
114 DWARFASTParser *DWARFBaseDIE::GetDWARFParser() const {
115   lldb_private::TypeSystem *type_system = GetTypeSystem();
116   if (type_system)
117     return type_system->GetDWARFParser();
118   else
119     return nullptr;
120 }
121 
122 bool DWARFBaseDIE::HasChildren() const {
123   return m_die && m_die->HasChildren();
124 }
125 
126 bool DWARFBaseDIE::Supports_DW_AT_APPLE_objc_complete_type() const {
127   return IsValid() && GetDWARF()->Supports_DW_AT_APPLE_objc_complete_type(m_cu);
128 }
129 
130 size_t DWARFBaseDIE::GetAttributes(DWARFAttributes &attributes,
131                                uint32_t depth) const {
132   if (IsValid())
133     return m_die->GetAttributes(m_cu, attributes, depth);
134   if (depth == 0)
135     attributes.Clear();
136   return 0;
137 }
138 
139 bool operator==(const DWARFBaseDIE &lhs, const DWARFBaseDIE &rhs) {
140   return lhs.GetDIE() == rhs.GetDIE() && lhs.GetCU() == rhs.GetCU();
141 }
142 
143 bool operator!=(const DWARFBaseDIE &lhs, const DWARFBaseDIE &rhs) {
144   return !(lhs == rhs);
145 }
146 
147 const DWARFDataExtractor &DWARFBaseDIE::GetData() const {
148   // Clients must check if this DIE is valid before calling this function.
149   assert(IsValid());
150   return m_cu->GetData();
151 }
152