mono/tests/assemblyresolve_event6.cs

   1 using System;
   2 using System.IO;
   3 using System.Threading;
   4 using System.Reflection;
   5
   6 public class App
   7 {
   8         public static int Main ()
   9         {
  10                 /* Regression test for #58950: When the
  11                  * ReflectionOnlyAssemblyResolve event handler throws an
  12                  * exception, mono would unwind native code in the loader,
  13                  * which left stale coop handles on the coop handle stack.
  14                  * Then, the domain unload, asserted in
  15                  * mono_handle_stack_free_domain (). */
  16                 var d = AppDomain.CreateDomain ("TestDomain");
  17                 var o = d.CreateInstanceAndUnwrap (typeof (App).Assembly.FullName, "App/Work") as Work;
  18                 var r = o.DoSomething ();
  19                 if (r != 0)
  20                         return r;
  21                 AppDomain.Unload (d);
  22                 return 0;
  23         }
  24
  25         public class MyExn : Exception {
  26                 public MyExn () : base ("MyReflectionResolveEventHandler threw") {}
  27         }
  28
  29         public class Work : MarshalByRefObject {
  30                 public Work () { }
  31
  32                 public int DoSomething ()
  33                 {
  34                         AppDomain.CurrentDomain.ReflectionOnlyAssemblyResolve += new ResolveEventHandler (MyReflectionResolveEventHandler);
  35                         bool caught = false;
  36                         try {
  37                                 Assembly a = Assembly.ReflectionOnlyLoadFrom ("assemblyresolve_asm.dll");
  38                                 var t = a.GetType ("Asm2");
  39                                 var m = t.GetMethod ("M"); // This triggers a load of TestBase
  40                                 Console.Error.WriteLine ("got '{0}'", m);
  41                         } catch (FileNotFoundException e) {
  42                                 Console.WriteLine ("caught FNFE {0}", e);
  43                                 caught = true;
  44                         } catch (MyExn ) {
  45                                 Console.Error.WriteLine ("caught MyExn, should've been a FNFE");
  46                                 return 2;
  47                         }
  48                         if (!caught) {
  49                                 Console.Error.WriteLine ("expected to catch a FNFE");
  50                                 return 3;
  51                         }
  52                         return 0;
  53                 }
  54
  55                 static Assembly MyReflectionResolveEventHandler (object sender, ResolveEventArgs args) {
  56                         Console.Error.WriteLine ($"Load event for: {args.Name}");
  57                         if (args.Name == "Test, Version=0.0.0.0, Culture=neutral" || args.Name == "Test, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null")
  58                                 return Assembly.ReflectionOnlyLoadFrom (Path.Combine (Directory.GetCurrentDirectory (), "assemblyresolve_deps", "Test.dll"));
  59                         // a request to load TestBase will throw here, which
  60                         // should be caught in the runtime
  61                         throw new MyExn ();
  62                 }
  63         }
  64 }