[Helix] dmp/crash tweaks (#27209)

eng/helix/content/RunTests/TestRunner.cs

@@ -46,6 +46,9 @@ namespace RunTests
                 var appRuntimePath = $"{Options.DotnetRoot}/shared/Microsoft.AspNetCore.App/{Options.RuntimeVersion}";
                 Console.WriteLine($"Set ASPNET_RUNTIME_PATH: {appRuntimePath}");
                 EnvironmentVariables.Add("ASPNET_RUNTIME_PATH", appRuntimePath);
+                var dumpPath = Environment.GetEnvironmentVariable("HELIX_DUMP_FOLDER");
+                Console.WriteLine($"Set VSTEST_DUMP_PATH: {dumpPath}");
+                EnvironmentVariables.Add("VSTEST_DUMP_PATH", dumpPath);
 
 #if INSTALLPLAYWRIGHT
                 // Playwright will download and look for browsers to this directory
@@ -211,7 +214,8 @@ namespace RunTests
             {
                 // Timeout test run 5 minutes before the Helix job would timeout
                 var cts = new CancellationTokenSource(Options.Timeout.Subtract(TimeSpan.FromMinutes(5)));
-                var commonTestArgs = $"test {Options.Target} --logger:xunit --logger:\"console;verbosity=normal\" --blame \"CollectHangDump;TestTimeout=15m\"";
+                var diagLog = Path.Combine(Environment.GetEnvironmentVariable("HELIX_WORKITEM_UPLOAD_ROOT"), "vstest.log");
+                var commonTestArgs = $"test {Options.Target} --diag:{diagLog} --logger:xunit --logger:\"console;verbosity=normal\" --blame \"CollectHangDump;TestTimeout=15m\"";
                 if (Options.Quarantined)
                 {
                     Console.WriteLine("Running quarantined tests.");
@@ -293,10 +297,10 @@ namespace RunTests
             {
                 Console.WriteLine("No logs found in artifacts/log");
             }
-            Console.WriteLine($"Copying TestResults/**/*.dmp to {HELIX_WORKITEM_UPLOAD_ROOT}/");
+            Console.WriteLine($"Copying TestResults/**/Sequence*.xml to {HELIX_WORKITEM_UPLOAD_ROOT}/");
             if (Directory.Exists("TestResults"))
             {
-                foreach (var file in Directory.EnumerateFiles("TestResults", "*.dmp", SearchOption.AllDirectories))
+                foreach (var file in Directory.EnumerateFiles("TestResults", "Sequence*.xml", SearchOption.AllDirectories))
                 {
                     var fileName = Path.GetFileName(file);
                     Console.WriteLine($"Copying: {file} to {Path.Combine(HELIX_WORKITEM_UPLOAD_ROOT, fileName)}");
@@ -305,7 +309,7 @@ namespace RunTests
             }
             else
             {
-                Console.WriteLine("No dmps found in TestResults");
+                Console.WriteLine("No TestResults directory found.");
             }
         }
     }