1 //===-- ValueObjectChild.h --------------------------------------*- 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 #ifndef LLDB_CORE_VALUEOBJECTCHILD_H
10 #define LLDB_CORE_VALUEOBJECTCHILD_H
11 
12 #include "lldb/Core/ValueObject.h"
13 
14 #include "lldb/Symbol/CompilerType.h"
15 #include "lldb/Utility/ConstString.h"
16 #include "lldb/lldb-defines.h"
17 #include "lldb/lldb-enumerations.h"
18 #include "lldb/lldb-private-enumerations.h"
19 #include "lldb/lldb-types.h"
20 
21 #include <cstddef>
22 #include <cstdint>
23 #include <optional>
24 
25 namespace lldb_private {
26 
27 /// A child of another ValueObject.
28 class ValueObjectChild : public ValueObject {
29 public:
30   ~ValueObjectChild() override;
31 
GetByteSize()32   std::optional<uint64_t> GetByteSize() override { return m_byte_size; }
33 
GetByteOffset()34   lldb::offset_t GetByteOffset() override { return m_byte_offset; }
35 
GetBitfieldBitSize()36   uint32_t GetBitfieldBitSize() override { return m_bitfield_bit_size; }
37 
GetBitfieldBitOffset()38   uint32_t GetBitfieldBitOffset() override { return m_bitfield_bit_offset; }
39 
40   lldb::ValueType GetValueType() const override;
41 
42   size_t CalculateNumChildren(uint32_t max) override;
43 
44   ConstString GetTypeName() override;
45 
46   ConstString GetQualifiedTypeName() override;
47 
48   ConstString GetDisplayTypeName() override;
49 
50   bool IsInScope() override;
51 
IsBaseClass()52   bool IsBaseClass() override { return m_is_base_class; }
53 
IsDereferenceOfParent()54   bool IsDereferenceOfParent() override { return m_is_deref_of_parent; }
55 
56 protected:
57   bool UpdateValue() override;
58 
59   LazyBool CanUpdateWithInvalidExecutionContext() override;
60 
GetCompilerTypeImpl()61   CompilerType GetCompilerTypeImpl() override { return m_compiler_type; }
62 
63   CompilerType m_compiler_type;
64   ConstString m_type_name;
65   uint64_t m_byte_size;
66   int32_t m_byte_offset;
67   uint8_t m_bitfield_bit_size;
68   uint8_t m_bitfield_bit_offset;
69   bool m_is_base_class;
70   bool m_is_deref_of_parent;
71   std::optional<LazyBool> m_can_update_with_invalid_exe_ctx;
72 
73   friend class ValueObject;
74   friend class ValueObjectConstResult;
75   friend class ValueObjectConstResultImpl;
76   friend class ValueObjectVTable;
77 
78   ValueObjectChild(ValueObject &parent, const CompilerType &compiler_type,
79                    ConstString name, uint64_t byte_size,
80                    int32_t byte_offset, uint32_t bitfield_bit_size,
81                    uint32_t bitfield_bit_offset, bool is_base_class,
82                    bool is_deref_of_parent,
83                    AddressType child_ptr_or_ref_addr_type,
84                    uint64_t language_flags);
85 
86   ValueObjectChild(const ValueObjectChild &) = delete;
87   const ValueObjectChild &operator=(const ValueObjectChild &) = delete;
88 };
89 
90 } // namespace lldb_private
91 
92 #endif // LLDB_CORE_VALUEOBJECTCHILD_H
93