1//===-- ValueObjectCast.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 "lldb/Core/ValueObjectCast.h"
10
11#include "lldb/Core/Value.h"
12#include "lldb/Core/ValueObject.h"
13#include "lldb/Symbol/CompilerType.h"
14#include "lldb/Target/ExecutionContext.h"
15#include "lldb/Utility/Scalar.h"
16#include "lldb/Utility/Status.h"
17
18namespace lldb_private {
19class ConstString;
20}
21
22using namespace lldb_private;
23
24lldb::ValueObjectSP ValueObjectCast::Create(ValueObject &parent,
25 ConstString name,
26 const CompilerType &cast_type) {
27 ValueObjectCast *cast_valobj_ptr =
28 new ValueObjectCast(parent, name, cast_type);
29 return cast_valobj_ptr->GetSP();
30}
31
32ValueObjectCast::ValueObjectCast(ValueObject &parent, ConstString name,
33 const CompilerType &cast_type)
34 : ValueObject(parent), m_cast_type(cast_type) {
35 SetName(name);
36 m_value.SetCompilerType(cast_type);
37}
38
39ValueObjectCast::~ValueObjectCast() {}
40
41CompilerType ValueObjectCast::GetCompilerTypeImpl() { return m_cast_type; }
42
43size_t ValueObjectCast::CalculateNumChildren(uint32_t max) {
44 ExecutionContext exe_ctx(GetExecutionContextRef());
45 auto children_count = GetCompilerType().GetNumChildren(
46 true, &exe_ctx);
47 return children_count <= max ? children_count : max;
48}
49
50llvm::Optional<uint64_t> ValueObjectCast::GetByteSize() {
51 ExecutionContext exe_ctx(GetExecutionContextRef());
52 return m_value.GetValueByteSize(nullptr, &exe_ctx);
53}
54
55lldb::ValueType ValueObjectCast::GetValueType() const {
56 // Let our parent answer global, local, argument, etc...
57 return m_parent->GetValueType();
58}
59
60bool ValueObjectCast::UpdateValue() {
61 SetValueIsValid(false);
62 m_error.Clear();
63
64 if (m_parent->UpdateValueIfNeeded(false)) {
65 Value old_value(m_value);
66 m_update_point.SetUpdated();
67 m_value = m_parent->GetValue();
68 CompilerType compiler_type(GetCompilerType());
69 m_value.SetCompilerType(compiler_type);
70 SetAddressTypeOfChildren(m_parent->GetAddressTypeOfChildren());
71 if (!CanProvideValue()) {
72 // this value object represents an aggregate type whose children have
73 // values, but this object does not. So we say we are changed if our
74 // location has changed.
75 SetValueDidChange(m_value.GetValueType() != old_value.GetValueType() ||
76 m_value.GetScalar() != old_value.GetScalar());
77 }
78 ExecutionContext exe_ctx(GetExecutionContextRef());
79 m_error = m_value.GetValueAsData(&exe_ctx, m_data, GetModule().get());
80 SetValueDidChange(m_parent->GetValueDidChange());
81 return true;
82 }
83
84 // The dynamic value failed to get an error, pass the error along
85 if (m_error.Success() && m_parent->GetError().Fail())
86 m_error = m_parent->GetError();
87 SetValueIsValid(false);
88 return false;
89}
90
91bool ValueObjectCast::IsInScope() { return m_parent->IsInScope(); }
92