From 28c0d2c1ff15ea8f8dbbe5b114fea5f89a9ac72f Mon Sep 17 00:00:00 2001
From: Safia Abdalla <safia@microsoft.com>
Date: Mon, 21 Sep 2020 23:31:34 +0000
Subject: [PATCH] Add support for associating BrowserDebugHost with parent
 process (#42541)

---
 src/mono/wasm/debugger/BrowserDebugHost/Program.cs |  2 ++
 src/mono/wasm/debugger/BrowserDebugHost/Startup.cs | 18 +++++++++++++++++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/mono/wasm/debugger/BrowserDebugHost/Program.cs b/src/mono/wasm/debugger/BrowserDebugHost/Program.cs
index c203cd0..6c4a79d 100644
--- a/src/mono/wasm/debugger/BrowserDebugHost/Program.cs
+++ b/src/mono/wasm/debugger/BrowserDebugHost/Program.cs
@@ -16,6 +16,8 @@ namespace Microsoft.WebAssembly.Diagnostics
     public class ProxyOptions
     {
         public Uri DevToolsUrl { get; set; } = new Uri("http://localhost:9222");
+
+        public int? OwnerPid { get; set; }
     }
 
     public class Program
diff --git a/src/mono/wasm/debugger/BrowserDebugHost/Startup.cs b/src/mono/wasm/debugger/BrowserDebugHost/Startup.cs
index 01974d8..70ce455 100644
--- a/src/mono/wasm/debugger/BrowserDebugHost/Startup.cs
+++ b/src/mono/wasm/debugger/BrowserDebugHost/Startup.cs
@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
 using System.Net.Http;
 using System.Text.Json;
@@ -13,6 +14,7 @@ using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Routing;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 using Microsoft.Extensions.Primitives;
@@ -33,9 +35,23 @@ namespace Microsoft.WebAssembly.Diagnostics
         public IConfiguration Configuration { get; }
 
         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
-        public void Configure(IApplicationBuilder app, IOptionsMonitor<ProxyOptions> optionsAccessor, IWebHostEnvironment env)
+        public void Configure(IApplicationBuilder app, IOptionsMonitor<ProxyOptions> optionsAccessor, IWebHostEnvironment env, IHostApplicationLifetime applicationLifetime)
         {
             ProxyOptions options = optionsAccessor.CurrentValue;
+
+            if (options.OwnerPid.HasValue)
+            {
+                Process ownerProcess = Process.GetProcessById(options.OwnerPid.Value);
+                if (ownerProcess != null)
+                {
+                    ownerProcess.EnableRaisingEvents = true;
+                    ownerProcess.Exited += (sender, eventArgs) =>
+                    {
+                        applicationLifetime.StopApplication();
+                    };
+                }
+            }
+
             app.UseDeveloperExceptionPage()
                 .UseWebSockets()
                 .UseDebugProxy(options);
-- 
2.7.4