1 //===-- DWARFBaseDIE.cpp --------------------------------------------------===// 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 #include <optional> 19 20 using namespace lldb_private; 21 using namespace lldb_private::plugin::dwarf; 22 23 std::optional<DIERef> DWARFBaseDIE::GetDIERef() const { 24 if (!IsValid()) 25 return std::nullopt; 26 27 return DIERef(m_cu->GetSymbolFileDWARF().GetFileIndex(), 28 m_cu->GetDebugSection(), m_die->GetOffset()); 29 } 30 31 dw_tag_t DWARFBaseDIE::Tag() const { 32 if (m_die) 33 return m_die->Tag(); 34 else 35 return llvm::dwarf::DW_TAG_null; 36 } 37 38 const char *DWARFBaseDIE::GetTagAsCString() const { 39 return DW_TAG_value_to_name(Tag()); 40 } 41 42 const char *DWARFBaseDIE::GetAttributeValueAsString(const dw_attr_t attr, 43 const char *fail_value) const { 44 if (IsValid()) 45 return m_die->GetAttributeValueAsString(GetCU(), attr, fail_value); 46 else 47 return fail_value; 48 } 49 50 uint64_t DWARFBaseDIE::GetAttributeValueAsUnsigned(const dw_attr_t attr, 51 uint64_t fail_value) const { 52 if (IsValid()) 53 return m_die->GetAttributeValueAsUnsigned(GetCU(), attr, fail_value); 54 else 55 return fail_value; 56 } 57 58 std::optional<uint64_t> 59 DWARFBaseDIE::GetAttributeValueAsOptionalUnsigned(const dw_attr_t attr) const { 60 if (IsValid()) 61 return m_die->GetAttributeValueAsOptionalUnsigned(GetCU(), attr); 62 return std::nullopt; 63 } 64 65 uint64_t DWARFBaseDIE::GetAttributeValueAsAddress(const dw_attr_t attr, 66 uint64_t fail_value) const { 67 if (IsValid()) 68 return m_die->GetAttributeValueAsAddress(GetCU(), attr, fail_value); 69 else 70 return fail_value; 71 } 72 73 lldb::user_id_t DWARFBaseDIE::GetID() const { 74 const std::optional<DIERef> &ref = this->GetDIERef(); 75 if (ref) 76 return ref->get_id(); 77 78 return LLDB_INVALID_UID; 79 } 80 81 const char *DWARFBaseDIE::GetName() const { 82 if (IsValid()) 83 return m_die->GetName(m_cu); 84 else 85 return nullptr; 86 } 87 88 lldb::ModuleSP DWARFBaseDIE::GetModule() const { 89 SymbolFileDWARF *dwarf = GetDWARF(); 90 if (dwarf) 91 return dwarf->GetObjectFile()->GetModule(); 92 else 93 return lldb::ModuleSP(); 94 } 95 96 dw_offset_t DWARFBaseDIE::GetOffset() const { 97 if (IsValid()) 98 return m_die->GetOffset(); 99 else 100 return DW_INVALID_OFFSET; 101 } 102 103 SymbolFileDWARF *DWARFBaseDIE::GetDWARF() const { 104 if (m_cu) 105 return &m_cu->GetSymbolFileDWARF(); 106 else 107 return nullptr; 108 } 109 110 bool DWARFBaseDIE::HasChildren() const { 111 return m_die && m_die->HasChildren(); 112 } 113 114 bool DWARFBaseDIE::Supports_DW_AT_APPLE_objc_complete_type() const { 115 return IsValid() && GetDWARF()->Supports_DW_AT_APPLE_objc_complete_type(m_cu); 116 } 117 118 DWARFAttributes DWARFBaseDIE::GetAttributes(Recurse recurse) const { 119 if (IsValid()) 120 return m_die->GetAttributes(m_cu, recurse); 121 return DWARFAttributes(); 122 } 123 124 namespace lldb_private::plugin { 125 namespace dwarf { 126 bool operator==(const DWARFBaseDIE &lhs, const DWARFBaseDIE &rhs) { 127 return lhs.GetDIE() == rhs.GetDIE() && lhs.GetCU() == rhs.GetCU(); 128 } 129 130 bool operator!=(const DWARFBaseDIE &lhs, const DWARFBaseDIE &rhs) { 131 return !(lhs == rhs); 132 } 133 } // namespace dwarf 134 } // namespace lldb_private::plugin 135 136 const DWARFDataExtractor &DWARFBaseDIE::GetData() const { 137 // Clients must check if this DIE is valid before calling this function. 138 assert(IsValid()); 139 return m_cu->GetData(); 140 } 141