gcfail.cs

using System;

using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;

using System.Threading;

namespace HelloDroid
{
    public class Activity1 : Activity, Java.Lang.IRunnable
    {
        int count = 1;

        Android.OS.Handler mHandler = new Handler();

        public Activity1(IntPtr handle)
            : base(handle)
        {
        }

        Button button;
        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            // Create your application here
            button = new Button(this);

            button.Text = "Click Me!";
            button.Click += delegate { button.Text = string.Format("{0} clicks!", count++); };

            SetContentView(button);

            byte[] stuff = new byte[200];

            var thread = new Thread(() =>
                {
                    byte[] foo = new byte[94934];
                    Thread.Sleep(2000);
                    // this will cause an activity not responding. the gc's call to pthread_kill fails with EPERM
                    // and deadlocks the app.
                    System.GC.Collect();
                    mHandler.Post(this);
                }
            );
            thread.Start();

        }

        public void Run()
        {
            button.Text = "thread done!";
        }
    }
}