托管CLR和捕获线程异常 [英] hosting clr and catching threading exceptions

问题描述

我试图写它可以加载插件管理的插件系统。主机应该可以，如果有任何异常卸载插件。
我POC我在C＃示例代码库，它抛出一个异常，这样的...

I am trying to write an plugin system that can load managed plugins. The host should be able to unload the plugins if there are any exceptions. for my poc I have a sample code library in C# that throws an exception like this ...

 public static int StartUp(string arguments)
 {
       Console.WriteLine("Started exception thrower with args {0}", arguments);
       Thread workerThread = new Thread(() => 
            {
                Console.WriteLine("Starting a thread, doing some important work");
                Thread.Sleep(1000);
                throw new ApplicationException();
            }
         );
         workerThread.Start();
         workerThread.Join();
         Console.WriteLine("this should never print");
        return 11;
    }

然后我有本地的Win32控制台应用程序，这样的..

then i have native win32 console app like this ..

int _tmain(int argc, _TCHAR* argv[])
{
    ICLRMetaHost *pMetaHost       = NULL;
    HRESULT hr; 
    ICLRRuntimeInfo *runtimeInfo = NULL;    
    __try
    {
        hr = CLRCreateInstance(CLSID_CLRMetaHost, IID_ICLRMetaHost, (LPVOID*)&pMetaHost);
        hr = pMetaHost->GetRuntime(L"v4.0.30319",IID_ICLRRuntimeInfo,(LPVOID*)&runtimeInfo);
        ICLRRuntimeHost *runtimeHost  = NULL;
        hr = runtimeInfo->GetInterface(CLSID_CLRRuntimeHost,IID_ICLRRuntimeHost, (LPVOID*)&runtimeHost);    
        ICLRControl* clrControl = NULL;
        hr = runtimeHost->GetCLRControl(&clrControl);
        ICLRPolicyManager *clrPolicyManager = NULL;
        clrControl->GetCLRManager(IID_ICLRPolicyManager, (LPVOID*)&clrPolicyManager);
        clrPolicyManager->SetDefaultAction(OPR_ThreadAbort,eUnloadAppDomain);   
        hr = runtimeHost->Start();
        DWORD returnVal = NULL;         
        hr = runtimeHost->ExecuteInDefaultAppDomain(L"ExceptionThrower.dll",L"ExceptionThrower.MainExceptionThrower",L"StartUp",L"test",&returnVal);        
        runtimeHost->Release();
    }
    __except(1)
    {
        wprintf(L"\n Error thrown %d",e);
    }
    return 0;
}

问题是，如果我使用上面的代码，主机将完成运行托管代码（行这不应该打印将最终印刷）
。如果我删除clrPolicyManager-> SetUnhandledExceptionPolicy（eHostDeterminedPolicy），然后主机进程将崩溃。

Issue is that if i use the above code, the host would complete running the managed code (the line "this should never print" would end up printing) If i remove the clrPolicyManager->SetUnhandledExceptionPolicy(eHostDeterminedPolicy), then the host process would crash.

可以任何东西在非托管主机完成，它可以优雅地去除运行时错误的应用程序，并继续工作？

can anything be done in the unmanaged host that it could gracefully remove the errant app from runtime and continue working ?

推荐答案

你可以专门启动一个新的AppDomain对于每一个给定的插件和内部启动它。请参见 http://msdn.microsoft.com/en-us/library/ms164323。 ASPX

You can start a new AppDomain specifically for each given plugin and launch it inside. See http://msdn.microsoft.com/en-us/library/ms164323.aspx

每个AppDomain中是一个孤立的环境中，代码可以执行。在一个AppDomain中存在的异常可以从日其余部分隔离。请参阅： http://msdn.microsoft。 COM / EN-US /库/ system.appdomain（v = VS.100）的.aspx

Each AppDomain is an isolated environment where code can execute. Exceptions occuring in one AppDomain can be isolated from th rest. See: http://msdn.microsoft.com/en-us/library/system.appdomain(v=VS.100).aspx

这篇关于托管CLR和捕获线程异常的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！