624ea68cbc
Change GetNumChildren()/CalculateNumChildren() methods return llvm::Expected This is an NFC change that does not yet add any error handling or change any code to return any errors. This is the second big change in the patch series started with https://github.com/llvm/llvm-project/pull/83501 A follow-up PR will wire up error handling.
95 lines
3.2 KiB
C++
95 lines
3.2 KiB
C++
//===-- ValueObjectCast.cpp -----------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Core/ValueObjectCast.h"
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#include "lldb/Core/Value.h"
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#include "lldb/Core/ValueObject.h"
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#include "lldb/Symbol/CompilerType.h"
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#include "lldb/Target/ExecutionContext.h"
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#include "lldb/Utility/Scalar.h"
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#include "lldb/Utility/Status.h"
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#include <optional>
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namespace lldb_private {
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class ConstString;
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}
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using namespace lldb_private;
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lldb::ValueObjectSP ValueObjectCast::Create(ValueObject &parent,
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ConstString name,
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const CompilerType &cast_type) {
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ValueObjectCast *cast_valobj_ptr =
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new ValueObjectCast(parent, name, cast_type);
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return cast_valobj_ptr->GetSP();
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}
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ValueObjectCast::ValueObjectCast(ValueObject &parent, ConstString name,
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const CompilerType &cast_type)
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: ValueObject(parent), m_cast_type(cast_type) {
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SetName(name);
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m_value.SetCompilerType(cast_type);
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}
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ValueObjectCast::~ValueObjectCast() = default;
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CompilerType ValueObjectCast::GetCompilerTypeImpl() { return m_cast_type; }
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llvm::Expected<uint32_t> ValueObjectCast::CalculateNumChildren(uint32_t max) {
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ExecutionContext exe_ctx(GetExecutionContextRef());
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auto children_count = GetCompilerType().GetNumChildren(
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true, &exe_ctx);
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if (!children_count)
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return children_count;
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return *children_count <= max ? *children_count : max;
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}
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std::optional<uint64_t> ValueObjectCast::GetByteSize() {
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ExecutionContext exe_ctx(GetExecutionContextRef());
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return m_value.GetValueByteSize(nullptr, &exe_ctx);
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}
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lldb::ValueType ValueObjectCast::GetValueType() const {
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// Let our parent answer global, local, argument, etc...
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return m_parent->GetValueType();
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}
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bool ValueObjectCast::UpdateValue() {
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SetValueIsValid(false);
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m_error.Clear();
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if (m_parent->UpdateValueIfNeeded(false)) {
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Value old_value(m_value);
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m_update_point.SetUpdated();
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m_value = m_parent->GetValue();
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CompilerType compiler_type(GetCompilerType());
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m_value.SetCompilerType(compiler_type);
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SetAddressTypeOfChildren(m_parent->GetAddressTypeOfChildren());
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if (!CanProvideValue()) {
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// this value object represents an aggregate type whose children have
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// values, but this object does not. So we say we are changed if our
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// location has changed.
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SetValueDidChange(m_value.GetValueType() != old_value.GetValueType() ||
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m_value.GetScalar() != old_value.GetScalar());
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}
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ExecutionContext exe_ctx(GetExecutionContextRef());
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m_error = m_value.GetValueAsData(&exe_ctx, m_data, GetModule().get());
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SetValueDidChange(m_parent->GetValueDidChange());
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return true;
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}
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// The dynamic value failed to get an error, pass the error along
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if (m_error.Success() && m_parent->GetError().Fail())
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m_error = m_parent->GetError();
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SetValueIsValid(false);
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return false;
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}
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bool ValueObjectCast::IsInScope() { return m_parent->IsInScope(); }
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