Re-enable Microsoft.Extensions.Hosting shutdown functional coverage in CI and harden shutdown startup/Helix/NET481 compatibility

src/libraries/Microsoft.Extensions.Hosting/tests/FunctionalTests/IntegrationTesting/src/Deployers/SelfHostDeployer.cs

@@ -20,6 +20,7 @@ public class SelfHostDeployer : ApplicationDeployer
         private const string ApplicationStartedMessage = "Application started. Press Ctrl+C to shut down.";
 
         public Process HostProcess { get; private set; }
+        public event DataReceivedEventHandler OutputReceived;
 
         public SelfHostDeployer(DeploymentParameters deploymentParameters, ILoggerFactory loggerFactory)
             : base(deploymentParameters, loggerFactory)
@@ -130,6 +131,8 @@ protected async Task<CancellationToken> StartSelfHostAsync()
                     {
                         started.TrySetResult(null);
                     }
+
+                    OutputReceived?.Invoke(sender, dataArgs);
                 };
                 var hostExitTokenSource = new CancellationTokenSource();
                 HostProcess.Exited += (sender, e) =>

src/libraries/Microsoft.Extensions.Hosting/tests/FunctionalTests/IntegrationTesting/src/ProcessExtensions.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.ComponentModel;
 using System.Diagnostics;
 using System.IO;
 using System.Runtime.InteropServices;
@@ -11,6 +12,8 @@ namespace Microsoft.Extensions.Internal
 {
     internal static class ProcessExtensions
     {
+        private const int ESRCH = 3;
+        private const int SIGTERM = 15;
         private static readonly bool _isWindows = RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
         private static readonly TimeSpan _defaultTimeout = TimeSpan.FromSeconds(30);
 
@@ -41,11 +44,19 @@ public static void KillTree(this Process process, TimeSpan timeout)
 
         private static void GetAllChildIdsUnix(int parentId, ISet<int> children, TimeSpan timeout)
         {
-            RunProcessAndWaitForExit(
-                "pgrep",
-                $"-P {parentId}",
-                timeout,
-                out var stdout);
+            string stdout;
+            try
+            {
+                RunProcessAndWaitForExit(
+                    "pgrep",
+                    $"-P {parentId}",
+                    timeout,
+                    out stdout);
+            }
+            catch (Win32Exception)
+            {
+                return;
+            }
 
             if (!string.IsNullOrEmpty(stdout))
             {
@@ -72,11 +83,62 @@ private static void GetAllChildIdsUnix(int parentId, ISet<int> children, TimeSpa
 
         private static void KillProcessUnix(int processId, TimeSpan timeout)
         {
-            RunProcessAndWaitForExit(
-                "kill",
-                $"-TERM {processId}",
-                timeout,
-                out var stdout);
+            try
+            {
+                if (kill(processId, SIGTERM) != 0)
+                {
+                    var error = Marshal.GetLastWin32Error();
+                    if (error != ESRCH)
+                    {
+                        KillProcessUnixHard(processId, timeout);
+                        return;
+                    }
+                }
+
+                using (Process process = Process.GetProcessById(processId))
+                {
+                    if (!process.WaitForExit((int)timeout.TotalMilliseconds))
+                    {
+                        KillProcessUnixHard(processId, timeout);
+                    }
+                }
+            }
+            catch (ArgumentException)
+            {
+                // Ignore if process has already exited.
+            }
+            catch (InvalidOperationException)
+            {
+                // Ignore if process has already exited.
+            }
+            catch (Win32Exception)
+            {
+                KillProcessUnixHard(processId, timeout);
+            }
+        }
+
+        private static void KillProcessUnixHard(int processId, TimeSpan timeout)
+        {
+            try
+            {
+                using (Process process = Process.GetProcessById(processId))
+                {
+                    process.Kill();
+                    process.WaitForExit((int)timeout.TotalMilliseconds);
+                }
+            }
+            catch (ArgumentException)
+            {
+                // Ignore if process has already exited.
+            }
+            catch (InvalidOperationException)
+            {
+                // Ignore if process has already exited.
+            }
+            catch (Win32Exception)
+            {
+                // Ignore permission or process-not-found errors.
+            }
         }
 
         private static void RunProcessAndWaitForExit(string fileName, string arguments, TimeSpan timeout, out string stdout)
@@ -102,5 +164,8 @@ private static void RunProcessAndWaitForExit(string fileName, string arguments,
                 process.Kill();
             }
         }
+
+        [DllImport("libc", SetLastError = true)]
+        private static extern int kill(int pid, int sig);
     }
 }

src/libraries/Microsoft.Extensions.Hosting/tests/FunctionalTests/IntegrationTesting/src/PublishedApplication.cs

@@ -19,7 +19,7 @@ public PublishedApplication(string path, ILogger logger)
             Path = path;
         }
 
-        public void Dispose()
+        public virtual void Dispose()
         {
             RetryHelper.RetryOperation(
                 () => Directory.Delete(Path, true),

src/libraries/Microsoft.Extensions.Hosting/tests/FunctionalTests/Microsoft.Extensions.Hosting.Functional.Tests.csproj

@@ -3,8 +3,6 @@
   <PropertyGroup>
     <TargetFrameworks>$(NetCoreAppCurrent);$(NetFrameworkCurrent)</TargetFrameworks>
     <EnableDefaultItems>true</EnableDefaultItems>
-    <!-- ActiveIssue in AssemblyInfo.cs -->
-    <IgnoreForCI>true</IgnoreForCI>
   </PropertyGroup>
 
   <ItemGroup>

src/libraries/Microsoft.Extensions.Hosting/tests/FunctionalTests/Properties/AssemblyInfo.cs

@@ -4,4 +4,3 @@
 using Xunit;
 
 [assembly: CollectionBehavior(CollectionBehavior.CollectionPerAssembly)]
-[assembly: ActiveIssue("https://github.com/dotnet/runtime/issues/34090")] // Note: remove IgnoreForCI from .csproj when reenabling

src/libraries/Microsoft.Extensions.Hosting/tests/FunctionalTests/ShutdownTests.cs

@@ -2,8 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System;
+using System.ComponentModel;
 using System.Diagnostics;
-using System.IO;
 using System.Runtime.InteropServices;
 using System.Threading.Tasks;
 using Microsoft.Extensions.Hosting.IntegrationTesting;
@@ -16,6 +16,7 @@ namespace Microsoft.AspNetCore.Hosting.FunctionalTests
 {
     public class ShutdownTests
     {
+        private const int SIGINT = 2;
         private static readonly string StartedMessage = "Started";
         private static readonly string CompletionMessage = "Stopping firing\n" +
                                                             "Stopping end\n" +
@@ -50,34 +51,30 @@ private async Task ExecuteShutdownTest(string testName, string shutdownMechanic)
                 builder.AddXunit(_output);
             });
 
-            // TODO refactor deployers to not depend on source code
-            // see https://github.com/dotnet/extensions/issues/1697 and https://github.com/dotnet/aspnetcore/issues/10268
-#pragma warning disable 0618
-            var applicationPath = string.Empty; // disabled for now
-#pragma warning restore 0618
+            string applicationPath = AppContext.BaseDirectory;
 
             Version version = Environment.Version;
             var deploymentParameters = new DeploymentParameters(
                 applicationPath,
                 RuntimeFlavor.CoreClr,
                 RuntimeArchitecture.x64)
             {
+                ApplicationName = "Microsoft.Extensions.Hosting.TestApp",
                 TargetFramework = $"net{version.Major}.{version.Minor}",
                 ApplicationType = ApplicationType.Portable,
                 PublishApplicationBeforeDeployment = true,
                 StatusMessagesEnabled = false
             };
+            deploymentParameters.ApplicationPublisher = new ExistingOutputApplicationPublisher(applicationPath);
 
             deploymentParameters.EnvironmentVariables["DOTNET_STARTMECHANIC"] = shutdownMechanic;
 
             using (var deployer = new SelfHostDeployer(deploymentParameters, xunitTestLoggerFactory))
             {
-                var result = await deployer.DeployAsync();
-
                 var started = new TaskCompletionSource<int>(TaskCreationOptions.RunContinuationsAsynchronously);
                 var completed = new TaskCompletionSource<int>(TaskCreationOptions.RunContinuationsAsynchronously);
                 var output = string.Empty;
-                deployer.HostProcess.OutputDataReceived += (sender, args) =>
+                deployer.OutputReceived += (sender, args) =>
                 {
                     if (!string.IsNullOrEmpty(args.Data) && args.Data.StartsWith(StartedMessage))
                     {
@@ -95,11 +92,13 @@ private async Task ExecuteShutdownTest(string testName, string shutdownMechanic)
                     }
                 };
 
-                await started.Task.WaitAsync(TimeSpan.FromSeconds(60));
+                await deployer.DeployAsync();
+
+                await started.Task.WaitAsync(TimeSpan.FromSeconds(180));
 
                 SendShutdownSignal(deployer.HostProcess);
 
-                await completed.Task.WaitAsync(TimeSpan.FromSeconds(60));
+                await completed.Task.WaitAsync(TimeSpan.FromSeconds(180));
 
                 WaitForExitOrKill(deployer.HostProcess);
 
@@ -132,16 +131,10 @@ private void SendShutdownSignal(Process hostProcess)
 
         private static void SendSIGINT(int processId)
         {
-            var startInfo = new ProcessStartInfo
+            if (kill(processId, SIGINT) != 0)
             {
-                FileName = "kill",
-                Arguments = processId.ToString(),
-                RedirectStandardOutput = true,
-                UseShellExecute = false
-            };
-
-            var process = Process.Start(startInfo);
-            WaitForExitOrKill(process);
+                throw new Win32Exception(Marshal.GetLastWin32Error());
+            }
         }
 
         private static void WaitForExitOrKill(Process process)
@@ -150,9 +143,37 @@ private static void WaitForExitOrKill(Process process)
             if (!process.HasExited)
             {
                 process.Kill();
+                // Wait for the process to actually exit after Kill() before accessing ExitCode
+                if (!process.WaitForExit(5000))
+                {
+                    throw new InvalidOperationException($"Process {process.Id} did not exit within timeout after Kill()");
+                }
             }
 
             Assert.Equal(0, process.ExitCode);
         }
+
+        private sealed class ExistingOutputApplicationPublisher : ApplicationPublisher
+        {
+            public ExistingOutputApplicationPublisher(string applicationPath)
+                : base(applicationPath)
+            {
+            }
+
+            public override Task<PublishedApplication> Publish(DeploymentParameters deploymentParameters, ILogger logger)
+                => Task.FromResult<PublishedApplication>(new BorrowedPublishedApplication(ApplicationPath, logger));
+
+            // Wraps a path that is borrowed (not owned) from the test output directory.
+            // Dispose is intentionally a no-op to prevent deleting AppContext.BaseDirectory.
+            private sealed class BorrowedPublishedApplication : PublishedApplication
+            {
+                public BorrowedPublishedApplication(string path, ILogger logger) : base(path, logger) { }
+
+                public override void Dispose() { }
+            }
+        }
+
+        [DllImport("libc", SetLastError = true)]
+        private static extern int kill(int pid, int sig);
     }
 }