94 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9#include "lldb/ValueObject/ValueObjectCast.h"10 11#include "lldb/Core/Value.h"12#include "lldb/Symbol/CompilerType.h"13#include "lldb/Target/ExecutionContext.h"14#include "lldb/Utility/Scalar.h"15#include "lldb/Utility/Status.h"16#include "lldb/ValueObject/ValueObject.h"17#include <optional>18 19namespace lldb_private {20class ConstString;21}22 23using namespace lldb_private;24 25lldb::ValueObjectSP ValueObjectCast::Create(ValueObject &parent,26 ConstString name,27 const CompilerType &cast_type) {28 ValueObjectCast *cast_valobj_ptr =29 new ValueObjectCast(parent, name, cast_type);30 return cast_valobj_ptr->GetSP();31}32 33ValueObjectCast::ValueObjectCast(ValueObject &parent, ConstString name,34 const CompilerType &cast_type)35 : ValueObject(parent), m_cast_type(cast_type) {36 SetName(name);37 m_value.SetCompilerType(cast_type);38}39 40ValueObjectCast::~ValueObjectCast() = default;41 42CompilerType ValueObjectCast::GetCompilerTypeImpl() { return m_cast_type; }43 44llvm::Expected<uint32_t> ValueObjectCast::CalculateNumChildren(uint32_t max) {45 ExecutionContext exe_ctx(GetExecutionContextRef());46 auto children_count = GetCompilerType().GetNumChildren(true, &exe_ctx);47 if (!children_count)48 return children_count;49 return *children_count <= max ? *children_count : max;50}51 52llvm::Expected<uint64_t> ValueObjectCast::GetByteSize() {53 ExecutionContext exe_ctx(GetExecutionContextRef());54 return m_value.GetValueByteSize(nullptr, &exe_ctx);55}56 57lldb::ValueType ValueObjectCast::GetValueType() const {58 // Let our parent answer global, local, argument, etc...59 return m_parent->GetValueType();60}61 62bool ValueObjectCast::UpdateValue() {63 SetValueIsValid(false);64 m_error.Clear();65 66 if (m_parent->UpdateValueIfNeeded(false)) {67 Value old_value(m_value);68 m_update_point.SetUpdated();69 m_value = m_parent->GetValue();70 CompilerType compiler_type(GetCompilerType());71 m_value.SetCompilerType(compiler_type);72 SetAddressTypeOfChildren(m_parent->GetAddressTypeOfChildren());73 if (!CanProvideValue()) {74 // this value object represents an aggregate type whose children have75 // values, but this object does not. So we say we are changed if our76 // location has changed.77 SetValueDidChange(m_value.GetValueType() != old_value.GetValueType() ||78 m_value.GetScalar() != old_value.GetScalar());79 }80 ExecutionContext exe_ctx(GetExecutionContextRef());81 m_error = m_value.GetValueAsData(&exe_ctx, m_data, GetModule().get());82 SetValueDidChange(m_parent->GetValueDidChange());83 return true;84 }85 86 // The dynamic value failed to get an error, pass the error along87 if (m_error.Success() && m_parent->GetError().Fail())88 m_error = m_parent->GetError().Clone();89 SetValueIsValid(false);90 return false;91}92 93bool ValueObjectCast::IsInScope() { return m_parent->IsInScope(); }94