1 //===-- ValueObjectDynamicValue.cpp ---------------------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 
11 #include "lldb/Core/ValueObjectCast.h"
12 
13 // C Includes
14 // C++ Includes
15 // Other libraries and framework includes
16 // Project includes
17 #include "lldb/Core/Log.h"
18 #include "lldb/Core/Module.h"
19 #include "lldb/Core/ValueObjectList.h"
20 #include "lldb/Core/Value.h"
21 #include "lldb/Core/ValueObject.h"
22 
23 #include "lldb/Symbol/CompilerType.h"
24 #include "lldb/Symbol/ObjectFile.h"
25 #include "lldb/Symbol/SymbolContext.h"
26 #include "lldb/Symbol/Type.h"
27 #include "lldb/Symbol/Variable.h"
28 
29 #include "lldb/Target/ExecutionContext.h"
30 #include "lldb/Target/Process.h"
31 #include "lldb/Target/RegisterContext.h"
32 #include "lldb/Target/Target.h"
33 #include "lldb/Target/Thread.h"
34 
35 using namespace lldb_private;
36 
37 lldb::ValueObjectSP
38 ValueObjectCast::Create (ValueObject &parent,
39                          const ConstString &name,
40                          const CompilerType &cast_type)
41 {
42     ValueObjectCast *cast_valobj_ptr = new ValueObjectCast (parent, name, cast_type);
43     return cast_valobj_ptr->GetSP();
44 }
45 
46 ValueObjectCast::ValueObjectCast
47 (
48     ValueObject &parent,
49     const ConstString &name,
50     const CompilerType &cast_type
51 ) :
52     ValueObject(parent),
53     m_cast_type (cast_type)
54 {
55     SetName (name);
56     //m_value.SetContext (Value::eContextTypeClangType, cast_type.GetOpaqueQualType());
57     m_value.SetCompilerType (cast_type);
58 }
59 
60 ValueObjectCast::~ValueObjectCast()
61 {
62 }
63 
64 CompilerType
65 ValueObjectCast::GetCompilerTypeImpl ()
66 {
67     return m_cast_type;
68 }
69 
70 size_t
71 ValueObjectCast::CalculateNumChildren(uint32_t max)
72 {
73     auto children_count = GetCompilerType().GetNumChildren (true);
74     return children_count <= max ? children_count : max;
75 }
76 
77 uint64_t
78 ValueObjectCast::GetByteSize()
79 {
80     ExecutionContext exe_ctx (GetExecutionContextRef());
81     return m_value.GetValueByteSize(nullptr, &exe_ctx);
82 }
83 
84 lldb::ValueType
85 ValueObjectCast::GetValueType() const
86 {
87     // Let our parent answer global, local, argument, etc...
88     return m_parent->GetValueType();
89 }
90 
91 bool
92 ValueObjectCast::UpdateValue ()
93 {
94     SetValueIsValid (false);
95     m_error.Clear();
96 
97     if (m_parent->UpdateValueIfNeeded(false))
98     {
99         Value old_value(m_value);
100         m_update_point.SetUpdated();
101         m_value = m_parent->GetValue();
102         CompilerType compiler_type (GetCompilerType());
103         //m_value.SetContext (Value::eContextTypeClangType, compiler_type);
104         m_value.SetCompilerType (compiler_type);
105         SetAddressTypeOfChildren(m_parent->GetAddressTypeOfChildren());
106         if (!CanProvideValue())
107         {
108             // this value object represents an aggregate type whose
109             // children have values, but this object does not. So we
110             // say we are changed if our location has changed.
111             SetValueDidChange (m_value.GetValueType() != old_value.GetValueType() || m_value.GetScalar() != old_value.GetScalar());
112         }
113         ExecutionContext exe_ctx (GetExecutionContextRef());
114         m_error = m_value.GetValueAsData(&exe_ctx, m_data, 0, GetModule().get());
115         SetValueDidChange (m_parent->GetValueDidChange());
116         return true;
117     }
118 
119     // The dynamic value failed to get an error, pass the error along
120     if (m_error.Success() && m_parent->GetError().Fail())
121         m_error = m_parent->GetError();
122     SetValueIsValid (false);
123     return false;
124 }
125 
126 bool
127 ValueObjectCast::IsInScope ()
128 {
129     return m_parent->IsInScope();
130 }
131