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 #include "lldb/Utility/Log.h"
18
19 using namespace lldb_private;
20
GetDIERef() const21 llvm::Optional<DIERef> DWARFBaseDIE::GetDIERef() const {
22 if (!IsValid())
23 return llvm::None;
24
25 return DIERef(m_cu->GetSymbolFileDWARF().GetDwoNum(), m_cu->GetDebugSection(),
26 m_die->GetOffset());
27 }
28
Tag() const29 dw_tag_t DWARFBaseDIE::Tag() const {
30 if (m_die)
31 return m_die->Tag();
32 else
33 return llvm::dwarf::DW_TAG_null;
34 }
35
GetTagAsCString() const36 const char *DWARFBaseDIE::GetTagAsCString() const {
37 return lldb_private::DW_TAG_value_to_name(Tag());
38 }
39
GetAttributeValueAsString(const dw_attr_t attr,const char * fail_value) const40 const char *DWARFBaseDIE::GetAttributeValueAsString(const dw_attr_t attr,
41 const char *fail_value) const {
42 if (IsValid())
43 return m_die->GetAttributeValueAsString(GetCU(), attr, fail_value);
44 else
45 return fail_value;
46 }
47
GetAttributeValueAsUnsigned(const dw_attr_t attr,uint64_t fail_value) const48 uint64_t DWARFBaseDIE::GetAttributeValueAsUnsigned(const dw_attr_t attr,
49 uint64_t fail_value) const {
50 if (IsValid())
51 return m_die->GetAttributeValueAsUnsigned(GetCU(), attr, fail_value);
52 else
53 return fail_value;
54 }
55
GetAttributeValueAsAddress(const dw_attr_t attr,uint64_t fail_value) const56 uint64_t DWARFBaseDIE::GetAttributeValueAsAddress(const dw_attr_t attr,
57 uint64_t fail_value) const {
58 if (IsValid())
59 return m_die->GetAttributeValueAsAddress(GetCU(), attr, fail_value);
60 else
61 return fail_value;
62 }
63
GetID() const64 lldb::user_id_t DWARFBaseDIE::GetID() const {
65 if (IsValid())
66 return GetDWARF()->GetUID(*this);
67 return LLDB_INVALID_UID;
68 }
69
GetName() const70 const char *DWARFBaseDIE::GetName() const {
71 if (IsValid())
72 return m_die->GetName(m_cu);
73 else
74 return nullptr;
75 }
76
GetLanguage() const77 lldb::LanguageType DWARFBaseDIE::GetLanguage() const {
78 if (IsValid())
79 return m_cu->GetLanguageType();
80 else
81 return lldb::eLanguageTypeUnknown;
82 }
83
GetModule() const84 lldb::ModuleSP DWARFBaseDIE::GetModule() const {
85 SymbolFileDWARF *dwarf = GetDWARF();
86 if (dwarf)
87 return dwarf->GetObjectFile()->GetModule();
88 else
89 return lldb::ModuleSP();
90 }
91
GetOffset() const92 dw_offset_t DWARFBaseDIE::GetOffset() const {
93 if (IsValid())
94 return m_die->GetOffset();
95 else
96 return DW_INVALID_OFFSET;
97 }
98
GetDWARF() const99 SymbolFileDWARF *DWARFBaseDIE::GetDWARF() const {
100 if (m_cu)
101 return &m_cu->GetSymbolFileDWARF();
102 else
103 return nullptr;
104 }
105
GetTypeSystem() const106 llvm::Expected<lldb_private::TypeSystem &> DWARFBaseDIE::GetTypeSystem() const {
107 if (!m_cu)
108 return llvm::make_error<llvm::StringError>(
109 "Unable to get TypeSystem, no compilation unit available",
110 llvm::inconvertibleErrorCode());
111 return m_cu->GetTypeSystem();
112 }
113
GetDWARFParser() const114 DWARFASTParser *DWARFBaseDIE::GetDWARFParser() const {
115 auto type_system_or_err = GetTypeSystem();
116 if (auto err = type_system_or_err.takeError()) {
117 LLDB_LOG_ERROR(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_SYMBOLS),
118 std::move(err), "Unable to get DWARFASTParser");
119 return nullptr;
120 }
121 return type_system_or_err->GetDWARFParser();
122 }
123
HasChildren() const124 bool DWARFBaseDIE::HasChildren() const {
125 return m_die && m_die->HasChildren();
126 }
127
Supports_DW_AT_APPLE_objc_complete_type() const128 bool DWARFBaseDIE::Supports_DW_AT_APPLE_objc_complete_type() const {
129 return IsValid() && GetDWARF()->Supports_DW_AT_APPLE_objc_complete_type(m_cu);
130 }
131
GetAttributes(DWARFAttributes & attributes,uint32_t depth) const132 size_t DWARFBaseDIE::GetAttributes(DWARFAttributes &attributes,
133 uint32_t depth) const {
134 if (IsValid())
135 return m_die->GetAttributes(m_cu, attributes, depth);
136 if (depth == 0)
137 attributes.Clear();
138 return 0;
139 }
140
operator ==(const DWARFBaseDIE & lhs,const DWARFBaseDIE & rhs)141 bool operator==(const DWARFBaseDIE &lhs, const DWARFBaseDIE &rhs) {
142 return lhs.GetDIE() == rhs.GetDIE() && lhs.GetCU() == rhs.GetCU();
143 }
144
operator !=(const DWARFBaseDIE & lhs,const DWARFBaseDIE & rhs)145 bool operator!=(const DWARFBaseDIE &lhs, const DWARFBaseDIE &rhs) {
146 return !(lhs == rhs);
147 }
148
GetData() const149 const DWARFDataExtractor &DWARFBaseDIE::GetData() const {
150 // Clients must check if this DIE is valid before calling this function.
151 assert(IsValid());
152 return m_cu->GetData();
153 }
154