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 = DesktopBuildServerController.RunServer(
pipeName,
Path.GetTempPath(),
host.Object,
keepAlive: null);
Assert.Equal(CommonCompiler.Failed, result);
}
finally
{
mutex.ReleaseMutex();
}
}
}
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 ?? DesktopBuildServerController.CreateCompilerServerHost();
tempPath = tempPath ?? Path.GetTempPath();
var clientConnectionHost = DesktopBuildServerController.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 task = Task.Run(() =>
{
var listener = new TestableDiagnosticListener();
listener.Listening += (sender, e) => { serverListenSource.TrySetResult(true); };
try
{
DesktopBuildServerController.RunServer(
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));
}
public void RunServerWithLongTempPath()
{
var pipeName = Guid.NewGuid().ToString("N");
// Make a really long path. This should work on Windows, which doesn't rely on temp path,
// but not on Unix, which has a max path length
var tempPath = new string('a', 100);
// This test fails by spinning forever. If the path is not seen as invalid, the server
// starts up and will never return.
Assert.Equal(CommonCompiler.Failed, DesktopBuildServerController.RunServer(pipeName, tempPath: tempPath));
}
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(_ =>
{
Mutex mutex = null;
try
{
Assert.True(Mutex.TryOpenExisting(mutexName, out mutex));
Assert.False(mutex.WaitOne(millisecondsTimeout: 0));
source.SetResult(true);
}
catch (Exception ex)
{
source.SetException(ex);
throw;
}
finally
{
mutex?.Dispose();
}
});
// 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 = DesktopBuildServerController.RunServer(
pipeName,
Path.GetTempPath(),
host.Object,
keepAlive: TimeSpan.FromSeconds(1));
Assert.Equal(CommonCompiler.Succeeded, result);
}
internal static ServerData CreateServer(
string pipeName = null,
ICompilerServerHost compilerServerHost = null,
bool failingServer = false)
{
pipeName = pipeName ?? Guid.NewGuid().ToString();
compilerServerHost = compilerServerHost ?? DesktopBuildServerController.CreateCompilerServerHost();
var clientConnectionHost = DesktopBuildServerController.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 thread = new Thread(_ =>
{
var listener = new TestableDiagnosticListener();
listener.Listening += (sender, e) => { serverListenSource.TrySetResult(true); };
try
{
DesktopBuildServerController.RunServer(
pipeName,
clientConnectionHost,
listener,
keepAlive: TimeSpan.FromMilliseconds(-1),
cancellationToken: cts.Token);
}
finally
{
var serverStats = new ServerStats(connections: listener.ConnectionCount, completedConnections: listener.CompletedCount);
serverStatsSource.SetResult(serverStats);
}
});
thread.Start();
// 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 && thread.IsAlive)
{
Thread.Yield();
}
return(new ServerData(cts, pipeName, serverStatsSource.Task, serverListenSource.Task));
}