bool ValueObjectDynamicValue::UpdateValue() {
SetValueIsValid(false);
m_error.Clear();
if (!m_parent->UpdateValueIfNeeded(false)) {
// The dynamic value failed to get an error, pass the error along
if (m_error.Success() && m_parent->GetError().Fail())
m_error = m_parent->GetError();
return false;
}
// Setting our type_sp to NULL will route everything back through our parent
// which is equivalent to not using dynamic values.
if (m_use_dynamic == lldb::eNoDynamicValues) {
m_dynamic_type_info.Clear();
return true;
}
ExecutionContext exe_ctx(GetExecutionContextRef());
Target *target = exe_ctx.GetTargetPtr();
if (target) {
m_data.SetByteOrder(target->GetArchitecture().GetByteOrder());
m_data.SetAddressByteSize(target->GetArchitecture().GetAddressByteSize());
}
// First make sure our Type and/or Address haven't changed:
Process *process = exe_ctx.GetProcessPtr();
if (!process)
return false;
TypeAndOrName class_type_or_name;
Address dynamic_address;
bool found_dynamic_type = false;
Value::ValueType value_type;
LanguageRuntime *runtime = nullptr;
lldb::LanguageType known_type = m_parent->GetObjectRuntimeLanguage();
if (known_type != lldb::eLanguageTypeUnknown &&
known_type != lldb::eLanguageTypeC) {
runtime = process->GetLanguageRuntime(known_type);
if (runtime)
found_dynamic_type = runtime->GetDynamicTypeAndAddress(
*m_parent, m_use_dynamic, class_type_or_name, dynamic_address,
value_type);
} else {
runtime = process->GetLanguageRuntime(lldb::eLanguageTypeC_plus_plus);
if (runtime)
found_dynamic_type = runtime->GetDynamicTypeAndAddress(
*m_parent, m_use_dynamic, class_type_or_name, dynamic_address,
value_type);
if (!found_dynamic_type) {
runtime = process->GetLanguageRuntime(lldb::eLanguageTypeObjC);
if (runtime)
found_dynamic_type = runtime->GetDynamicTypeAndAddress(
*m_parent, m_use_dynamic, class_type_or_name, dynamic_address,
value_type);
}
}
// Getting the dynamic value may have run the program a bit, and so marked us
// as needing updating, but we really don't...
m_update_point.SetUpdated();
if (runtime && found_dynamic_type) {
if (class_type_or_name.HasType()) {
m_type_impl =
TypeImpl(m_parent->GetCompilerType(),
runtime->FixUpDynamicType(class_type_or_name, *m_parent)
.GetCompilerType());
} else {
m_type_impl.Clear();
}
} else {
m_type_impl.Clear();
}
// If we don't have a dynamic type, then make ourselves just a echo of our
// parent. Or we could return false, and make ourselves an echo of our
// parent?
if (!found_dynamic_type) {
if (m_dynamic_type_info)
SetValueDidChange(true);
ClearDynamicTypeInformation();
m_dynamic_type_info.Clear();
m_value = m_parent->GetValue();
m_error = m_value.GetValueAsData(&exe_ctx, m_data, 0, GetModule().get());
return m_error.Success();
}
Value old_value(m_value);
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_TYPES));
bool has_changed_type = false;
if (!m_dynamic_type_info) {
m_dynamic_type_info = class_type_or_name;
has_changed_type = true;
} else if (class_type_or_name != m_dynamic_type_info) {
// We are another type, we need to tear down our children...
m_dynamic_type_info = class_type_or_name;
SetValueDidChange(true);
has_changed_type = true;
}
if (has_changed_type)
ClearDynamicTypeInformation();
if (!m_address.IsValid() || m_address != dynamic_address) {
if (m_address.IsValid())
SetValueDidChange(true);
// We've moved, so we should be fine...
m_address = dynamic_address;
lldb::TargetSP target_sp(GetTargetSP());
lldb::addr_t load_address = m_address.GetLoadAddress(target_sp.get());
m_value.GetScalar() = load_address;
}
if (runtime)
m_dynamic_type_info =
runtime->FixUpDynamicType(m_dynamic_type_info, *m_parent);
// m_value.SetContext (Value::eContextTypeClangType, corrected_type);
m_value.SetCompilerType(m_dynamic_type_info.GetCompilerType());
m_value.SetValueType(value_type);
if (has_changed_type && log)
log->Printf("[%s %p] has a new dynamic type %s", GetName().GetCString(),
static_cast<void *>(this), GetTypeName().GetCString());
if (m_address.IsValid() && m_dynamic_type_info) {
// The variable value is in the Scalar value inside the m_value. We can
// point our m_data right to it.
m_error = m_value.GetValueAsData(&exe_ctx, m_data, 0, GetModule().get());
if (m_error.Success()) {
if (!CanProvideValue()) {
// this value object represents an aggregate type whose children have
// values, but this object does not. So we say we are changed if our
// location has changed.
SetValueDidChange(m_value.GetValueType() != old_value.GetValueType() ||
m_value.GetScalar() != old_value.GetScalar());
}
SetValueIsValid(true);
return true;
}
}
// We get here if we've failed above...
SetValueIsValid(false);
return false;
}
