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