c# - 更新布局时出现“System.ArithmeticException”

Question

这只发生在 x64 版本中

An unhandled exception of type 'System.ArithmeticException' occurred in WindowsBase.dll Additional information: Overflow or underflow in the arithmetic operation.

在线崩溃

gridcontainer.Dispatcher.Invoke(DispatcherPriority.Render, EmptyDelegate);

如果我删除该行，它会在没有可用源的情况下开始更新布局时立即崩溃

00000101  test        ecx,ecx 
00000103  je          0000000000000124 
00000105  lea         rdx,[rbp+18h] 
00000109  mov         rcx,qword ptr [rbp+70h] 
0000010d  call        0000000000216100 
00000112  cmp         byte ptr [rdi],0 

你知道如何预防吗？

异常(exception):

    System.ArithmeticException: Overflow or underflow in the arithmetic operation.
   at System.Windows.UIElement.RoundLayoutSize(Size size, Double dpiScaleX, Double dpiScaleY)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.VirtualizingStackPanel.MeasureChild(IItemContainerGenerator& generator, IContainItemStorage& itemStorageProvider, IContainItemStorage& parentItemStorageProvider, Object& parentItem, Boolean& hasUniformOrAverageContainerSizeBeenSet, Double& computedUniformOrAverageContainerSize, Boolean& computedAreContainersUniformlySized, IList& items, Object& item, IList& children, Int32& childIndex, Boolean& visualOrderChanged, Boolean& isHorizontal, Size& childConstraint, Rect& viewport, VirtualizationCacheLength& cacheSize, VirtualizationCacheLengthUnit& cacheUnit, Boolean& foundFirstItemInViewport, Double& firstItemInViewportOffset, Size& stackPixelSize, Size& stackPixelSizeInViewport, Size& stackPixelSizeInCacheBeforeViewport, Size& stackPixelSizeInCacheAfterViewport, Size& stackLogicalSize, Size& stackLogicalSizeInViewport, Size& stackLogicalSizeInCacheBeforeViewport, Size& stackLogicalSizeInCacheAfterViewport, Boolean& mustDisableVirtualization, Boolean isBeforeFirstItem, Boolean isAfterFirstItem, Boolean isAfterLastItem, Boolean skipActualMeasure, Boolean skipGeneration, Boolean& hasBringIntoViewContainerBeenMeasured, Boolean& hasVirtualizingChildren)
   at System.Windows.Controls.VirtualizingStackPanel.MeasureOverrideImpl(Size constraint, Nullable`1& lastPageSafeOffset, List`1& previouslyMeasuredOffsets, Boolean remeasure)
   at System.Windows.Controls.VirtualizingStackPanel.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
   at System.Windows.Controls.ItemsPresenter.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
   at System.Windows.Controls.ScrollContentPresenter.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV, Boolean& hasDesiredSizeUChanged)
   at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.ScrollViewer.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Border.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Control.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.DockPanel.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV, Boolean& hasDesiredSizeUChanged)
   at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.ContextLayoutManager.UpdateLayout()
   at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)
   at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
   at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
   at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

Answer 1

我们偶尔会收到用户的此类报告。问题似乎与浮点单元损坏有关，如 this question 中所述.不幸的是，目前尚不清楚如何在框架调用中处理此类错误。

UPD:我根据演示框架创建了以下解决方法 source code .通过一次调用初始化解决方法:UIHelper.InitWPFArithmeticExceptionWorkaround()

public static class UIHelper
{
    [DllImport("msvcrt.dll", CallingConvention = CallingConvention.Cdecl)]
    public static extern int _fpreset();

    private static DispatcherOperationCallback _oldUpdateLayoutCallback;
    private static object UpdateLayoutCallback(object arg)
    {
        try
        {
            _oldUpdateLayoutCallback(arg);
            return null;
        }
        catch (System.Xaml.XamlParseException ex)
        {
            if (!(ex.InnerException is ArithmeticException))
            {
                throw;
            }
        }
        // Try to update layout second time after floating point unit reset
        _fpreset();
        _oldUpdateLayoutCallback(arg);
        return null;
    }

    public static bool InitWPFArithmeticExceptionWorkaround()
    {
        try
        {
            // Call fpreset early just to handle case with missed "msvcrt.dll" 
            // in future Windows versions
            _fpreset();
            Assembly assembly = typeof(System.Windows.UIElement).Assembly;
            Type managerType = assembly.GetType("System.Windows.ContextLayoutManager");
            if (managerType != null)
            {
                FieldInfo field = managerType.GetField("_updateCallback", BindingFlags.Static | BindingFlags.NonPublic);
                if (field != null)
                {
                    _oldUpdateLayoutCallback = field.GetValue(null) as DispatcherOperationCallback;
                    if (_oldUpdateLayoutCallback != null)
                    {
                        field.SetValue(null, new DispatcherOperationCallback(UpdateLayoutCallback));
                        return true;
                    }
                }
            }
        }
        catch
        {
        }
        return false;
    }
}