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 "llvm/ADT/Optional.h"
22 
23 #include <stddef.h>
24 #include <stdint.h>
25 
26 namespace lldb_private {
27 
28 // A child of another ValueObject.
29 class ValueObjectChild : public ValueObject {
30 public:
31   ~ValueObjectChild() override;
32 
33   llvm::Optional<uint64_t> GetByteSize() override { return m_byte_size; }
34 
35   lldb::offset_t GetByteOffset() override { return m_byte_offset; }
36 
37   uint32_t GetBitfieldBitSize() override { return m_bitfield_bit_size; }
38 
39   uint32_t GetBitfieldBitOffset() override { return m_bitfield_bit_offset; }
40 
41   lldb::ValueType GetValueType() const override;
42 
43   size_t CalculateNumChildren(uint32_t max) override;
44 
45   ConstString GetTypeName() override;
46 
47   ConstString GetQualifiedTypeName() override;
48 
49   ConstString GetDisplayTypeName() override;
50 
51   bool IsInScope() override;
52 
53   bool IsBaseClass() override { return m_is_base_class; }
54 
55   bool IsDereferenceOfParent() override { return m_is_deref_of_parent; }
56 
57 protected:
58   bool UpdateValue() override;
59 
60   LazyBool CanUpdateWithInvalidExecutionContext() override;
61 
62   CompilerType GetCompilerTypeImpl() override { return m_compiler_type; }
63 
64   CompilerType m_compiler_type;
65   ConstString m_type_name;
66   uint64_t m_byte_size;
67   int32_t m_byte_offset;
68   uint8_t m_bitfield_bit_size;
69   uint8_t m_bitfield_bit_offset;
70   bool m_is_base_class;
71   bool m_is_deref_of_parent;
72   llvm::Optional<LazyBool> m_can_update_with_invalid_exe_ctx;
73 
74   //
75   //  void
76   //  ReadValueFromMemory (ValueObject* parent, lldb::addr_t address);
77 
78   friend class ValueObject;
79   friend class ValueObjectConstResult;
80   friend class ValueObjectConstResultImpl;
81 
82   ValueObjectChild(ValueObject &parent, const CompilerType &compiler_type,
83                    ConstString name, uint64_t byte_size,
84                    int32_t byte_offset, uint32_t bitfield_bit_size,
85                    uint32_t bitfield_bit_offset, bool is_base_class,
86                    bool is_deref_of_parent,
87                    AddressType child_ptr_or_ref_addr_type,
88                    uint64_t language_flags);
89 
90   ValueObjectChild(const ValueObjectChild &) = delete;
91   const ValueObjectChild &operator=(const ValueObjectChild &) = delete;
92 };
93 
94 } // namespace lldb_private
95 
96 #endif // LLDB_CORE_VALUEOBJECTCHILD_H
97