Question

我们正在使用Microsoft.VisualStudio.XmlEditor命名空间（https://msdn.microsoft.com/en-us/library/microsoft.visualstudio.xmleditor.aspx）中的类来修改Visual Studio扩展中的xml文档。

由于某种原因，在调用XmlEditingScope.Complete()方法后发生死锁。在Visual Studio的状态栏中，我们看到消息＆＃34;等待解析完成...＆＃34;

这是死锁UI线程的堆栈跟踪：

WindowsBase.dll!System.Windows.Threading.DispatcherSynchronizationContext.Wait(System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout)   
mscorlib.dll!System.Threading.SynchronizationContext.InvokeWaitMethodHelper(System.Threading.SynchronizationContext syncContext, System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout)     
[Native to Managed Transition]   
[Managed to Native Transition]   
mscorlib.dll!System.Threading.WaitHandle.InternalWaitOne(System.Runtime.InteropServices.SafeHandle waitableSafeHandle, long millisecondsTimeout, bool hasThreadAffinity, bool exitContext)   
mscorlib.dll!System.Threading.WaitHandle.WaitOne(int millisecondsTimeout, bool exitContext)  
Microsoft.VisualStudio.Package.LanguageService.14.0.dll!Microsoft.VisualStudio.Package.LanguageService.ParseWaitHandle.WaitOne(int millisecondsTimeout, bool exitContext)    
Microsoft.XmlEditor.dll!Microsoft.XmlEditor.XmlLanguageService.WaitForParse(System.IAsyncResult result, Microsoft.XmlEditor.StatusBarIndicator indicator)    
Microsoft.XmlEditor.dll!Microsoft.XmlEditor.XmlLanguageService.WaitForParse()    
Microsoft.XmlEditor.dll!Microsoft.XmlEditor.XmlParserLock.XmlParserLock(Microsoft.XmlEditor.XmlLanguageService service)  
Microsoft.XmlEditor.dll!Microsoft.XmlEditor.Transaction.PushToEditorTreeAndBuffer()  
Microsoft.XmlEditor.dll!Microsoft.XmlEditor.Transaction.Complete()   
XmlEditingScope.Complete() Line 64

Visual Studio解析线程：

mscorlib.dll!System.Threading.WaitHandle.InternalWaitOne(System.Runtime.InteropServices.SafeHandle waitableSafeHandle, long millisecondsTimeout, bool hasThreadAffinity, bool exitContext) + 0x21 bytes  
mscorlib.dll!System.Threading.WaitHandle.WaitOne(int millisecondsTimeout, bool exitContext) + 0x28 bytes     
Microsoft.XmlEditor.dll!Microsoft.XmlEditor.LockManager.Lock(object resource, Microsoft.XmlEditor.LockMode mode, Microsoft.XmlEditor.Transaction txId) + 0x14c bytes     
Microsoft.XmlEditor.dll!Microsoft.XmlEditor.TransactionManager.BeginParseSourceTransaction(Microsoft.XmlEditor.XmlSource src, Microsoft.XmlEditor.Transaction parent) + 0x9f bytes   
Microsoft.XmlEditor.dll!Microsoft.XmlEditor.XmlLanguageService.ParseSource(Microsoft.VisualStudio.Package.ParseRequest req) + 0x17d bytes    
Microsoft.VisualStudio.Package.LanguageService.14.0.dll!Microsoft.VisualStudio.Package.LanguageService.ParseRequest(Microsoft.VisualStudio.Package.ParseRequest req) + 0x75 bytes    
Microsoft.VisualStudio.Package.LanguageService.14.0.dll!Microsoft.VisualStudio.Package.LanguageService.ParseThread() + 0x140 bytes   
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart_Context(object state) + 0x70 bytes    
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) + 0xa7 bytes   
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) + 0x16 bytes   
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) + 0x41 bytes     
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart() + 0x44 bytes    
[Native to Managed Transition]

在此处显示所有相关代码并不容易，但基本上它只是在WPF DataGrid控件（ViewModel中的IEditableObject.EndEdit）中更改后执行的以下代码：

using (var s = store.BeginEditingScope("Test", null))
{
       apply changes in xmlModel.Document... 

       s.Complete();
}

我该怎么做才能防止这种僵局的发生。在应用更改之前，我是否需要锁定某些内容？还有什么我可以做错的？

VSIX - XmlEditingScope.Complete（）上的死锁

0 个答案: