我有这个类,我在 AppDomain 中创建的实例没有权限但SecurityPermissionFlag.Execute:
class IsolationEntryPoint : MarshalByRefObject
{
// main is the original AppDomain with all the permissions
public void Enter(AppDomain main)
{
// these work correctly
Console.WriteLine("Currently in: " + AppDomain.CurrentDomain.FriendlyName);
Console.WriteLine("Host: " + main.FriendlyName);
// the exception is thrown here
main.DoCallBack(this.MyCallBack);
}
public void MyCallBack()
{
Console.WriteLine("Currently in: " + AppDomain.CurrentDomain.FriendlyName);
}
}
奇怪的是我在 DoCallback 行中得到 SecurityException 说:
请求“System.Security.Permissions.ReflectionPermission、mscorlib、Version=4.0.0.0、Culture=neutral、PublicKeyToken=b77a5c561934e089”类型的权限失败。
MSDN关于AppDomain.DoCallBack的权限要求这样说:
通过 Type.InvokeMember 等机制在后期绑定时调用 ReflectionPermission。
调用没有使用Type.InvokeMember之类的东西,为什么会出现异常?
编辑:
为清楚起见,这里是我用来创建带有隔离对象的 AppDomain 的代码:
[STAThread]
static void Main(string[] args)
{
var setup = new AppDomainSetup();
setup.ApplicationBase = Path.GetDirectoryName(Assembly.GetExecutingAssembly().CodeBase);
var evidence = new Evidence();
var permissions = new PermissionSet(PermissionState.None);
permissions.AddPermission(new SecurityPermission(SecurityPermissionFlag.Execution));
var domain = AppDomain.CreateDomain(
"isolationDomain",
evidence,
setup,
permissions);
var handle = Activator.CreateInstanceFrom(
domain, typeof(IsolationEntryPoint).Assembly.ManifestModule.FullyQualifiedName,
typeof(IsolationEntryPoint).FullName);
var instance = (IsolationEntryPoint)handle.Unwrap();
instance.Enter(AppDomain.CurrentDomain);
}
这两段代码是我的完整应用程序,没有别的(所以异常应该很容易重现)。
谢谢你的帮助