Beispiel #1
0
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;
    
    lldb::LanguageType known_type = m_parent->GetObjectRuntimeLanguage();
    if (known_type != lldb::eLanguageTypeUnknown && known_type != lldb::eLanguageTypeC)
    {
        LanguageRuntime *runtime = process->GetLanguageRuntime (known_type);
        if (runtime)
            found_dynamic_type = runtime->GetDynamicTypeAndAddress (*m_parent, m_use_dynamic, class_type_or_name, dynamic_address);
    }
    else
    {
        LanguageRuntime *cpp_runtime = process->GetLanguageRuntime (lldb::eLanguageTypeC_plus_plus);
        if (cpp_runtime)
            found_dynamic_type = cpp_runtime->GetDynamicTypeAndAddress (*m_parent, m_use_dynamic, class_type_or_name, dynamic_address);
        
        if (!found_dynamic_type)
        {
            LanguageRuntime *objc_runtime = process->GetLanguageRuntime (lldb::eLanguageTypeObjC);
            if (objc_runtime)
                found_dynamic_type = objc_runtime->GetDynamicTypeAndAddress (*m_parent, m_use_dynamic, class_type_or_name, dynamic_address);
        }
    }
    
    // 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 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, GetClangAST(), 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;
    }
    
    lldb::clang_type_t corrected_type;
    if (m_dynamic_type_info.HasTypeSP())
    {
        // The type will always be the type of the dynamic object.  If our parent's type was a pointer,
        // then our type should be a pointer to the type of the dynamic object.  If a reference, then the original type
        // should be okay...
        lldb::clang_type_t orig_type;
        clang::ASTContext* ast;
        orig_type = m_dynamic_type_info.GetTypeSP()->GetClangForwardType();
        ast = m_dynamic_type_info.GetTypeSP()->GetClangAST();
        corrected_type = orig_type;
        if (m_parent->IsPointerType())
            corrected_type = ClangASTContext::CreatePointerType (ast, orig_type);
        else if (m_parent->IsPointerOrReferenceType())
            corrected_type = ClangASTContext::CreateLValueReferenceType (ast, orig_type);
    }
    else /*if (m_dynamic_type_info.HasName())*/
    {
        // If we are here we need to adjust our dynamic type name to include the correct & or * symbol
        std::string type_name_buf (m_dynamic_type_info.GetName().GetCString());
        if (m_parent->IsPointerType())
            type_name_buf.append(" *");
        else if (m_parent->IsPointerOrReferenceType())
            type_name_buf.append(" &");
        corrected_type = m_parent->GetClangType();
        m_dynamic_type_info.SetName(type_name_buf.c_str());
    }
    
    m_value.SetContext (Value::eContextTypeClangType, corrected_type);
    
    // Our address is the location of the dynamic type stored in memory.  It isn't a load address,
    // because we aren't pointing to the LOCATION that stores the pointer to us, we're pointing to us...
    m_value.SetValueType(Value::eValueTypeScalar);

    if (has_changed_type && log)
        log->Printf("[%s %p] has a new dynamic type %s",
                    GetName().GetCString(),
                    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, GetClangAST(), m_data, 0, GetModule().get());
        if (m_error.Success())
        {
            if (ClangASTContext::IsAggregateType (GetClangType()))
            {
                // 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;
}
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;
}