[Mono-bugs] [Bug 74902][Wis] New - System.Windows.Forms.Timer needs some events to trigger
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bugzilla-daemon@bugzilla.ximian.com
Tue, 10 May 2005 16:27:33 -0400 (EDT)
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Changed by sebastien@ximian.com.
http://bugzilla.ximian.com/show_bug.cgi?id=74902
--- shadow/74902 2005-05-10 16:27:33.000000000 -0400
+++ shadow/74902.tmp.18623 2005-05-10 16:27:33.000000000 -0400
@@ -0,0 +1,105 @@
+Bug#: 74902
+Product: Mono: Class Libraries
+Version: 1.1
+OS:
+OS Details:
+Status: NEW
+Resolution:
+Severity:
+Priority: Wishlist
+Component: Windows.Forms
+AssignedTo: mono-bugs@ximian.com
+ReportedBy: sebastien@ximian.com
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL:
+Cc:
+Summary: System.Windows.Forms.Timer needs some events to trigger
+
+Description of Problem:
+System.Windows.Forms.Timer needs some other events to trigger.
+
+
+Steps to reproduce the problem:
+1. Compile this sample code
+
+using System;
+using System.Reflection;
+using System.Security;
+using System.Security.Permissions;
+using System.Windows.Forms;
+
+class Program {
+
+ static void ShowStackTrace (object o, EventArgs e)
+ {
+ if (debug)
+ Console.WriteLine ("{0}: {1}", counter, Environment.StackTrace);
+
+ try {
+ Console.WriteLine (Assembly.GetExecutingAssembly ().Evidence.Count);
+ result = 1;
+ }
+ catch (SecurityException se) {
+ if (debug)
+ Console.WriteLine ("EXPECTED SecurityException {0}", se);
+ }
+ catch (Exception ex) {
+ Console.WriteLine ("UNEXPECTED {0}", ex);
+ }
+
+ counter++;
+ }
+
+ static bool debug;
+ static int counter;
+ static int result = 0;
+
+ // this Deny will prevent the Assembly.Evidence property from working
+ [SecurityPermission (SecurityAction.Deny, ControlEvidence = true)]
+ static int Main (string[] args)
+ {
+ debug = (args.Length > 0);
+ if (debug) {
+ SecurityManager.SecurityEnabled = (args [0] != "off");
+ }
+
+ if (SecurityManager.SecurityEnabled) {
+ Console.WriteLine ("SecurityManager.SecurityEnabled: true");
+ ShowStackTrace (null, null);
+ } else {
+ Console.WriteLine ("SecurityManager.SecurityEnabled: false");
+ }
+
+ Timer t = new Timer ();
+ t.Tick += new EventHandler (ShowStackTrace);
+ t.Interval = 1000;
+ t.Start ();
+
+ while (counter <= 5)
+ Application.DoEvents ();
+
+ return result;
+ }
+}
+
+
+2. Execute the sample with a "x" parameter
+
+% mono sample.exe x
+
+
+Actual Results:
+No output is displayed.
+
+
+Expected Results:
+ShowStackTrace should output every second.
+
+
+How often does this happen?
+Always if you don't move the mouse (or probably other X events).
+
+
+Additional Information:
+* This seems to be like the Control.BeginInvoke polling bug