Question

我有一个WinForms应用程序，它将运行数小时。间歇运行3-4小时后，它开始崩溃。它使用CefSharp。事件日志显示错误与CEFSharp有关，但我无法再进一步了。任何帮助将不胜感激

Machine: Windows 7 Sp1
VC++ runtime installed
.NET framework 4.7
The crash dump shows below information:
Exception: the thread tried to read from or write to a virtual 
address for which it does not have the appropriate access.
Tried debugging crash dump, but not useful

下面的事件日志：

   - <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
   - <System>
     <Provider Name=".NET Runtime" /> 
     <EventID Qualifiers="0">1026</EventID> 
     <Level>2</Level> 
       <Task>0</Task> 
     <Keywords>0x80000000000000</Keywords> 
      <TimeCreated SystemTime="2019-05-31T14:38:54.000000000Z" /> 
     <EventRecordID>920</EventRecordID> 
      <Channel>Application</Channel> 
      <Security /> 
      </System>
    - <EventData>
      <Data>Application: Client.exe Framework Version: v4.0.30319 
         Description: The process was terminated due to an unhandled 
        exception. Exception Info: System.AccessViolationException at 
        CefSharp.Internals.MCefRefPtr<CefPostData>.op_Assign(CefPostData*) at 
        CefSharp.Internals.CefPostDataWrapper.~CefPostDataWrapper() at 
         CefSharp.Internals.CefPostDataWrapper.Dispose(Boolean) at 
               CefSharp.Internals.CefPostDataWrapper.Dispose() at 
              Client.AsmxRequestHandler+

ProcessRequestAsync（IRequest请求，ICallback回调）{ m_callback =回调；

        Task.Run(() =>
        {
            using (callback)
            {
                try
                {
                    using (var postData = request.PostData)
                    {
                        if (postData.Elements != null)
                        {
                            var elements = postData.Elements;
                            var charSet = request.GetCharSet();
                            var element = elements[0];
                            var elementBodyString = string.Empty;
                            foreach (var elemt in elements)
                            {
                                if (element.Type == PostDataElementType.Bytes)
                                {
                                    elementBodyString += elemt.GetBody(charSet);
                                }
                            }

                            if (element.Type == PostDataElementType.Bytes)
                            {
                                XmlSerializer mySerializerObj = new XmlSerializer(typeof(AsmxWrapperClasses.Envelope));

                                var mySoapRequest = (AsmxWrapperClasses.Envelope)mySerializerObj.Deserialize(GenerateStreamFromString(elementBodyString));
                                var requestBody = mySoapRequest.Body;

                                try
                                {
                                    var myResult = ProcessRequestBody(requestBody);

                                    var stream = GenerateStreamFromString(myResult);
                                    stream.Position = 0;
                                    ResponseLength = stream.Length;
                                    MimeType = MimeTypeMap.GetMimeType(Path.GetExtension(".asmx"));
                                    StatusCode = (int)HttpStatusCode.OK;
                                    Stream = stream;

                                    callback.Continue();
                                }
                                catch (ArgumentException ex)
                                {
                                    if (ex.Message == "requestBody invalid")
                                        throw new Exception(elementBodyString);
                                    throw;
                                }

                            }
                        }
                    }
                }
                catch (Exception ex)
                {
                    Debug.WriteLine(ex);
                    CLogger.GetInstance().LogError(ex.Message);
                }
            }
        });

        return true;
    }

Answer 1

我遇到了同样的问题。
看来问题是您处理了PostData

using (var postData = request.PostData)

如果删除该行，该问题似乎已解决。

使用CefSharp的Winforms崩溃，提示Accessviolation

1 个答案: