What's a good global exception handling strategy for Unity3D?

Question

I\'m looking into doing some Unity3D scripting stuff, and I\'d like to set up global exception handling system. This is not for running in the release version of the game, the i

Answer 1

There is a working implementation of RegisterLogCallback that I found here: http://answers.unity3d.com/questions/47659/callback-for-unhandled-exceptions.html

In my own implementation I use it to call my own MessageBox.Show instead of writing to a log file. I just call SetupExceptionHandling from each of my scenes.

    static bool isExceptionHandlingSetup;
    public static void SetupExceptionHandling()
    {
        if (!isExceptionHandlingSetup)
        {
            isExceptionHandlingSetup = true;
            Application.RegisterLogCallback(HandleException);
        }
    }

    static void HandleException(string condition, string stackTrace, LogType type)
    {
        if (type == LogType.Exception)
        {
            MessageBox.Show(condition + "\n" + stackTrace);
        }
    }

I also now have the error handler email me via this routine, so I always know when my app crashes and get as much detail as possible.

        internal static void ReportCrash(string message, string stack)
    {
        //Debug.Log("Report Crash");
        var errorMessage = new StringBuilder();

        errorMessage.AppendLine("FreeCell Quest " + Application.platform);

        errorMessage.AppendLine();
        errorMessage.AppendLine(message);
        errorMessage.AppendLine(stack);

        //if (exception.InnerException != null) {
        //    errorMessage.Append("\n\n ***INNER EXCEPTION*** \n");
        //    errorMessage.Append(exception.InnerException.ToString());
        //}

        errorMessage.AppendFormat
        (
            "{0} {1} {2} {3}\n{4}, {5}, {6}, {7}x {8}\n{9}x{10} {11}dpi FullScreen {12}, {13}, {14} vmem: {15} Fill: {16} Max Texture: {17}\n\nScene {18}, Unity Version {19}, Ads Disabled {18}",
            SystemInfo.deviceModel,
            SystemInfo.deviceName,
            SystemInfo.deviceType,
            SystemInfo.deviceUniqueIdentifier,

            SystemInfo.operatingSystem,
            Localization.language,
            SystemInfo.systemMemorySize,
            SystemInfo.processorCount,
            SystemInfo.processorType,

            Screen.currentResolution.width,
            Screen.currentResolution.height,
            Screen.dpi,
            Screen.fullScreen,
            SystemInfo.graphicsDeviceName,
            SystemInfo.graphicsDeviceVendor,
            SystemInfo.graphicsMemorySize,
            SystemInfo.graphicsPixelFillrate,
            SystemInfo.maxTextureSize,

            Application.loadedLevelName,
            Application.unityVersion,
            GameSettings.AdsDisabled
        );

        //if (Main.Player != null) {
        //    errorMessage.Append("\n\n ***PLAYER*** \n");
        //    errorMessage.Append(XamlServices.Save(Main.Player));
        //}

        try {
            using (var client = new WebClient()) {
                var arguments = new NameValueCollection();
                //if (loginResult != null)
                //    arguments.Add("SessionId", loginResult.SessionId.ToString());
                arguments.Add("report", errorMessage.ToString());
                var result = Encoding.ASCII.GetString(client.UploadValues(serviceAddress + "/ReportCrash", arguments));
                //Debug.Log(result);
            }
        } catch (WebException e) {
            Debug.Log("Report Crash: " + e.ToString());
        }
    }