Expose an icall to report unhandled exceptions in mscorlib.

Author: TautvydasZilys

mcs/class/referencesource/mscorlib/system/exception.cs

@@ -1114,6 +1114,9 @@ internal Exception FixRemotingException ()
 
             return this;
         }
+		
+		[MethodImplAttribute(MethodImplOptions.InternalCall)]
+		internal static extern void ReportUnhandledException(Exception exception);
 #endif
     }
 

mcs/class/referencesource/mscorlib/system/threading/synchronizationcontext.cs

@@ -420,10 +420,17 @@ public override void Post(SendOrPostCallback d, object state)
         [MonoPInvokeCallback(typeof(InvocationEntryDelegate))]
         private static void InvocationEntry(IntPtr arg)
         {
-            var invocationContextHandle = GCHandle.FromIntPtr(arg);
-            var invocationContext = (InvocationContext)invocationContextHandle.Target;
-            invocationContextHandle.Free();
-            invocationContext.Invoke();
+			try
+			{
+				var invocationContextHandle = GCHandle.FromIntPtr(arg);
+				var invocationContext = (InvocationContext)invocationContextHandle.Target;
+				invocationContextHandle.Free();
+				invocationContext.Invoke();
+			}
+			catch (Exception e)
+			{
+				Exception.ReportUnhandledException(e);
+			}
         }
 
 		[AttributeUsage (AttributeTargets.Method)]

mono/metadata/exception.c

@@ -1183,3 +1183,10 @@ mono_exception_from_name_four_strings_checked (MonoImage *image, const char *nam
 
 	return create_exception_four_strings (klass, a1, a2, a3, a4, error);
 }
+
+void
+ves_icall_System_Exception_ReportUnhandledException(MonoObject *exc)
+{
+	mono_unhandled_exception (exc);
+	mono_invoke_unhandled_exception_hook (exc);
+}

mono/metadata/exception.h

@@ -161,6 +161,9 @@ typedef void  (*MonoUnhandledExceptionFunc)         (MonoObject *exc, void *user
 MONO_API void mono_install_unhandled_exception_hook (MonoUnhandledExceptionFunc func, void *user_data);
 void          mono_invoke_unhandled_exception_hook  (MonoObject *exc);
 
+void
+ves_icall_System_Exception_ReportUnhandledException (MonoObject *exc);
+
 MONO_END_DECLS
 
 #endif /* _MONO_METADATA_EXCEPTION_H_ */

mono/metadata/icall-def.h

@@ -293,6 +293,9 @@ HANDLES(ICALL(ENV_18, "internalGetGacPath", ves_icall_System_Environment_GetGacP
 HANDLES(ICALL(ENV_19, "internalGetHome", ves_icall_System_Environment_InternalGetHome))
 ICALL(ENV_20, "set_ExitCode", mono_environment_exitcode_set)
 
+ICALL_TYPE(EXCEPTION, "System.Exception", EXCEPTION_1)
+HANDLES(ICALL(EXCEPTION_1, "ReportUnhandledException", ves_icall_System_Exception_ReportUnhandledException))
+
 ICALL_TYPE(GC, "System.GC", GC_0)
 ICALL(GC_0, "GetCollectionCount", mono_gc_collection_count)
 ICALL(GC_0a, "GetGeneration", mono_gc_get_generation)