public void MutexStopsServerStarting()
{
var pipeName = Guid.NewGuid().ToString("N");
var mutexName = BuildServerConnection.GetServerMutexName(pipeName);
bool holdsMutex;
using (var mutex = new Mutex(initiallyOwned: true,
name: mutexName,
createdNew: out holdsMutex))
{
Assert.True(holdsMutex);
try
{
var host = new Mock <IClientConnectionHost>(MockBehavior.Strict);
var result = BuildServerController.CreateAndRunServer(
pipeName,
Path.GetTempPath(),
host.Object,
keepAlive: null);
Assert.Equal(CommonCompiler.Failed, result);
}
finally
{
mutex.ReleaseMutex();
}
}
}
internal static ServerData Create(
ICompilerServerLogger logger,
string pipeName = null,
ICompilerServerHost compilerServerHost = null,
IClientConnectionHost clientConnectionHost = null,
TimeSpan?keepAlive = null)
{
// The total pipe path must be < 92 characters on Unix, so trim this down to 10 chars
pipeName ??= ServerUtil.GetPipeName();
compilerServerHost ??= BuildServerController.CreateCompilerServerHost(logger);
clientConnectionHost ??= BuildServerController.CreateClientConnectionHost(pipeName, logger);
keepAlive ??= TimeSpan.FromMilliseconds(-1);
var listener = new TestableDiagnosticListener();
var serverListenSource = new TaskCompletionSource <bool>();
var cts = new CancellationTokenSource();
var mutexName = BuildServerConnection.GetServerMutexName(pipeName);
var task = Task.Run(() =>
{
BuildServerController.CreateAndRunServer(
pipeName,
compilerServerHost,
clientConnectionHost,
listener,
keepAlive: keepAlive,
cancellationToken: cts.Token);
return(listener);
});
return(new ServerData(cts, pipeName, logger, task));
}
public void MutexAcquiredWhenRunningServer()
{
var pipeName = Guid.NewGuid().ToString("N");
var mutexName = BuildServerConnection.GetServerMutexName(pipeName);
var host = new TestableClientConnectionHost();
bool?wasServerMutexOpen = null;
host.Add(
() =>
{
// Use a thread instead of Task to guarantee this code runs on a different
// thread and we can validate the mutex state.
var tcs = new TaskCompletionSource <IClientConnection>();
var thread = new Thread(
_ =>
{
wasServerMutexOpen = BuildServerConnection.WasServerMutexOpen(
mutexName
);
var client = new TestableClientConnection()
{
ReadBuildRequestFunc = _ =>
Task.FromResult(ProtocolUtil.EmptyCSharpBuildRequest),
WriteBuildResponseFunc = (r, _) => Task.CompletedTask,
};
tcs.SetResult(client);
}
);
thread.Start();
return(tcs.Task);
}
);
host.Add(
() =>
{
var client = new TestableClientConnection()
{
ReadBuildRequestFunc = _ => Task.FromResult(BuildRequest.CreateShutdown()),
WriteBuildResponseFunc = (r, _) => Task.CompletedTask,
};
return(Task.FromResult <IClientConnection>(client));
}
);
var result = BuildServerController.CreateAndRunServer(
pipeName,
clientConnectionHost: host,
keepAlive: TimeSpan.FromMilliseconds(-1)
);
Assert.Equal(CommonCompiler.Succeeded, result);
Assert.True(wasServerMutexOpen);
}
internal static async Task <ServerData> CreateServer(
string pipeName = null,
ICompilerServerHost compilerServerHost = null,
bool failingServer = false,
string tempPath = null)
{
// The total pipe path must be < 92 characters on Unix, so trim this down to 10 chars
pipeName = pipeName ?? Guid.NewGuid().ToString().Substring(0, 10);
compilerServerHost = compilerServerHost ?? BuildServerController.CreateCompilerServerHost();
tempPath = tempPath ?? Path.GetTempPath();
var clientConnectionHost = BuildServerController.CreateClientConnectionHostForServerHost(compilerServerHost, pipeName);
if (failingServer)
{
clientConnectionHost = new FailingClientConnectionHost(clientConnectionHost);
}
var serverStatsSource = new TaskCompletionSource <ServerStats>();
var serverListenSource = new TaskCompletionSource <bool>();
var cts = new CancellationTokenSource();
var mutexName = BuildServerConnection.GetServerMutexName(pipeName);
var listener = new TestableDiagnosticListener();
var task = Task.Run(() =>
{
listener.Listening += (sender, e) => { serverListenSource.TrySetResult(true); };
try
{
BuildServerController.CreateAndRunServer(
pipeName,
tempPath,
clientConnectionHost,
listener,
keepAlive: TimeSpan.FromMilliseconds(-1),
cancellationToken: cts.Token);
}
finally
{
var serverStats = new ServerStats(connections: listener.ConnectionCount, completedConnections: listener.CompletedCount);
serverStatsSource.SetResult(serverStats);
}
});
// The contract of this function is that it will return once the server has started. Spin here until
// we can verify the server has started or simply failed to start.
while (BuildServerConnection.WasServerMutexOpen(mutexName) != true && !task.IsCompleted)
{
await Task.Yield();
}
if (task.IsFaulted)
{
throw task.Exception;
}
return(new ServerData(cts, pipeName, serverStatsSource.Task, serverListenSource.Task, listener.ConnectionCompletedCollection));
}
internal static async Task <ServerData> CreateServer(
string pipeName = null,
ICompilerServerHost compilerServerHost = null,
IClientConnectionHost clientConnectionHost = null,
TimeSpan?keepAlive = null)
{
// The total pipe path must be < 92 characters on Unix, so trim this down to 10 chars
pipeName ??= Guid.NewGuid().ToString().Substring(0, 10);
compilerServerHost ??= BuildServerController.CreateCompilerServerHost();
clientConnectionHost ??= BuildServerController.CreateClientConnectionHost(pipeName);
keepAlive ??= TimeSpan.FromMilliseconds(-1);
var listener = new TestableDiagnosticListener();
var listenerTaskCompletionSource = new TaskCompletionSource <TestableDiagnosticListener>();
var serverListenSource = new TaskCompletionSource <bool>();
var cts = new CancellationTokenSource();
var mutexName = BuildServerConnection.GetServerMutexName(pipeName);
var task = Task.Run(() =>
{
try
{
BuildServerController.CreateAndRunServer(
pipeName,
compilerServerHost,
clientConnectionHost,
listener,
keepAlive: keepAlive,
cancellationToken: cts.Token);
}
finally
{
listenerTaskCompletionSource.SetResult(listener);
}
});
// The contract of this function is that it will return once the server has started. Spin here until
// we can verify the server has started or simply failed to start.
while (BuildServerConnection.WasServerMutexOpen(mutexName) != true && !task.IsCompleted)
{
await Task.Yield();
}
if (task.IsFaulted)
{
throw task.Exception;
}
return(new ServerData(cts, pipeName, listenerTaskCompletionSource.Task));
}
public void MutexAcquiredWhenRunningServer()
{
var pipeName = Guid.NewGuid().ToString("N");
var mutexName = BuildServerConnection.GetServerMutexName(pipeName);
var host = new Mock <IClientConnectionHost>(MockBehavior.Strict);
host
.Setup(x => x.CreateListenTask(It.IsAny <CancellationToken>()))
.Returns(() =>
{
// Use a thread instead of Task to guarantee this code runs on a different
// thread and we can validate the mutex state.
var source = new TaskCompletionSource <bool>();
var thread = new Thread(_ =>
{
try
{
Assert.True(BuildServerConnection.WasServerMutexOpen(mutexName));
source.SetResult(true);
}
catch (Exception ex)
{
source.SetException(ex);
throw;
}
});
// Synchronously wait here. Don't returned a Task value because we need to
// ensure the above check completes before the server hits a timeout and
// releases the mutex.
thread.Start();
source.Task.Wait();
return(new TaskCompletionSource <IClientConnection>().Task);
});
var result = BuildServerController.CreateAndRunServer(
pipeName,
Path.GetTempPath(),
host.Object,
keepAlive: TimeSpan.FromSeconds(1));
Assert.Equal(CommonCompiler.Succeeded, result);
}