public void Another_monitor_can_safely_attach_and_deattach_to_existsing_session()
{
using (var testProcess = new TestProcessHandle())
{
using (var monitor = GCMonitor.StartForProcess(testProcess.Process.Id))
{
var observer = Substitute.For <IObserver <GCInfo> >();
monitor.Subscribe(observer);
using (var monitor2 = GCMonitor.StartForProcess(testProcess.Process.Id))
{
var observer2 = Substitute.For <IObserver <GCInfo> >();
monitor2.Subscribe(observer2);
testProcess.MakeGC(2);
TestHelpers.ShouldPassIn(() =>
{
observer.Received(1).OnNext(Arg.Is <GCInfo>(i => IsInducedGc(i, 2)));
}, 5.Seconds(), 25.Milliseconds());
}
testProcess.MakeGC(2);
TestHelpers.ShouldPassIn(() =>
{
// the first monitor should continue to receive GCs
observer.Received(2).OnNext(Arg.Is <GCInfo>(i => IsInducedGc(i, 2)));
}, 5.Seconds(), 25.Milliseconds());
}
}
}
public void Catches_gc_events()
{
using (var testProcess = new TestProcessHandle())
using (var monitor = GCMonitor.StartForProcess(testProcess.Process.Id))
{
var observer = Substitute.For <IObserver <GCInfo> >();
observer.When(o => o.OnNext(Arg.Any <GCInfo>())).Do(ci => DumpGCInfo(ci.Arg <GCInfo>()));
monitor.Subscribe(observer);
var depth = 2;
testProcess.MakeGC(depth);
TestHelpers.ShouldPassIn(() =>
{
observer
.Received(1)
.OnNext(Arg.Is <GCInfo>(i => IsInducedGc(i, depth)));
}, 3.Seconds(), 25.Milliseconds());
}
}
[TestCase(64)] // Max ETW sessions per host
//This cases sometimes fail
// [TestCase(256)]
// [TestCase(512)]
public void Can_create_many_gc_monitors(int count)
{
using (var testProcess = new TestProcessHandle())
{
var monitors = new GCMonitor[count];
var observers = new IObserver <GCInfo> [count];
for (var i = 0; i < count; i++)
{
observers[i] = Substitute.For <IObserver <GCInfo> >();
monitors[i] = GCMonitor.StartForProcess(testProcess.Process.Id);
monitors[i].Subscribe(observers[i]);
}
testProcess.MakeGC(2);
var received = new List <int>();
try
{
TestHelpers.ShouldPassIn(() =>
{
var receivedCount = 0;
foreach (var observer in observers)
{
try
{
observer.Received(1).OnNext(Arg.Is <GCInfo>(i => IsInducedGc(i, 2)));
receivedCount++;
}
catch
{
}
}
received.Add(receivedCount);
receivedCount.Should().Be(observers.Length);
}, 10.Seconds(), 100.Milliseconds());
}
finally
{
Console.WriteLine($"Called: {received.Count}. Received: {string.Join(",", received)}.");
}
}
}
public void When_monitor_which_created_etw_session_disposes_other_should_continue_to_get_events()
{
using (var testProcess = new TestProcessHandle())
{
using (var firstM = GCMonitor.StartForProcess(testProcess.Process.Id))
{
var firstO = Substitute.For <IObserver <GCInfo> >();
firstM.Subscribe(firstO);
using (var secondM = GCMonitor.StartForProcess(testProcess.Process.Id))
{
var secondO = Substitute.For <IObserver <GCInfo> >();
secondM.Subscribe(secondO);
// application which created the first monitor exits
Console.WriteLine("Disposing first monitor");
firstM.Dispose();
Console.WriteLine("Disposed first monitor");
// let some time pass...
Thread.Sleep(1000);
testProcess.MakeGC(2);
try
{
TestHelpers.ShouldPassIn(() =>
{
secondO.Received(1).OnNext(Arg.Is <GCInfo>(i => IsInducedGc(i, 2)));
}, 5.Seconds(), 25.Milliseconds());
}
catch (Exception)
{
Console.WriteLine("Waiting on second monitor failed");
throw;
}
}
}
}
}