//This attempts to prevent the program from crashing if a plugin throws an exception.
//It is a rather dirty approach and repeated calls will cause a memory leak.
private void PreventPluginCrash(object sender, UnhandledExceptionEventArgs e)
{
StackTrace trace = new StackTrace((Exception)e.ExceptionObject);
foreach (StackFrame frame in trace.GetFrames())
{
Assembly frameAssembly = frame.GetMethod().DeclaringType.Assembly;
if (Plugins.ContainsKey(frameAssembly.GetName().Name))
{
IMSPluginBase plugin = Plugins[frameAssembly.GetName().Name];
Logger.WriteError("An uncaught exception was raised in plugin " + plugin.Name + "! The plugin has been disabled. Error:\n" + e.ExceptionObject);
try
{
plugin.Stop();
}
catch (Exception stopException)
{
Logger.WriteError("During fatal error unload, the plugin's stop method also failed. Exception:\n" + stopException);
}
Plugins.Remove(plugin.Name);
KnownPlugins[plugin.PluginAssembly.GetName().Name].Enabled = false;
Thread.CurrentThread.IsBackground = true;
Thread.CurrentThread.Join(); //suspend the thread indefinitely to stop the CLR from shutting down
}
}
Logger.WriteError("A fatal error occured, resulting in IMS shutting down!\n" + e.ExceptionObject);
}
/// <summary>
/// Attempts to remove a plugin from memory. This does not guarantee that the plugin's assembly will be unloaded.
/// </summary>
/// <param name="plugin">The plugin to unload.</param>
public void UnloadPlugin(IMSPluginBase plugin)
{
lock (Locker)
if (Plugins.ContainsKey(plugin.PluginAssemblyName))
{
plugin.Stop();
Plugins.Remove(plugin.PluginAssemblyName);
}
else
{
throw new ArgumentException("This plugin object has not been loaded by the plugin manager.");
}
}