add more print traces in hot runner workflow (#148258)

In service of flutter/flutter#146879. See flutter/flutter#146879 (comment) in particular for the purpose of this PR. This adds a few more `printTrace` calls to try to see where we are getting stuck.

packages/flutter_tools/lib/src/isolated/resident_web_runner.dart

@@ -172,7 +172,7 @@ class ResidentWebRunner extends ResidentRunner {
     final vmservice.VmService? service = _connectionResult?.vmService;
     final Uri websocketUri = Uri.parse(_connectionResult!.debugConnection!.uri);
     final Uri httpUri = _httpUriFromWebsocketUri(websocketUri);
-    return _instance ??= FlutterVmService(service!, wsAddress: websocketUri, httpAddress: httpUri);
+    return _instance ??= FlutterVmService(service!, wsAddress: websocketUri, httpAddress: httpUri, logger: _logger);
   }
 
   FlutterVmService? _instance;

packages/flutter_tools/lib/src/vmservice.dart

@@ -417,7 +417,7 @@ Future<FlutterVmService> _connect(
   // This call is to ensure we are able to establish a connection instead of
   // keeping on trucking and failing farther down the process.
   await delegateService.getVersion();
-  return FlutterVmService(service, httpAddress: httpUri, wsAddress: wsUri);
+  return FlutterVmService(service, httpAddress: httpUri, wsAddress: wsUri, logger: logger);
 }
 
 String _validateRpcStringParam(String methodName, Map<String, Object?> params, String paramName) {
@@ -486,11 +486,13 @@ class FlutterVmService {
     this.service, {
     this.wsAddress,
     this.httpAddress,
-  });
+    required Logger logger,
+  }) : _logger = logger;
 
   final vm_service.VmService service;
   final Uri? wsAddress;
   final Uri? httpAddress;
+  final Logger _logger;
 
   Future<vm_service.Response?> callMethodWrapper(
     String method, {
@@ -569,6 +571,7 @@ class FlutterVmService {
     required Uri main,
     required Uri assetsDirectory,
   }) async {
+    _logger.printTrace('Running $main in view $viewId...');
     try {
       await service.streamListen(vm_service.EventStreams.kIsolate);
     } on vm_service.RPCError {
@@ -577,6 +580,7 @@ class FlutterVmService {
     final Future<void> onRunnable = service.onIsolateEvent.firstWhere((vm_service.Event event) {
       return event.kind == vm_service.EventKind.kIsolateRunnable;
     });
+    _logger.printTrace('Calling $kRunInViewMethod...');
     await callMethodWrapper(
       kRunInViewMethod,
       args: <String, Object>{
@@ -585,7 +589,9 @@ class FlutterVmService {
         'assetDirectory': assetsDirectory.toString(),
       },
     );
+    _logger.printTrace('Finished $kRunInViewMethod');
     await onRunnable;
+    _logger.printTrace('Finished running $main in view $viewId');
   }
 
   /// Renders the last frame with additional raster tracing enabled.
@@ -905,9 +911,11 @@ class FlutterVmService {
     Duration delay = const Duration(milliseconds: 50),
   }) async {
     while (true) {
+      _logger.printTrace('Calling _flutter.listViews...');
       final vm_service.Response? response = await callMethodWrapper(
         kListViewsMethod,
       );
+      _logger.printTrace('Response from _flutter.listViews: ${json.encode(response?.json)}');
       if (response == null) {
         // The service may have disappeared mid-request.
         // Return an empty list now, and let the shutdown logic elsewhere deal

packages/flutter_tools/test/general.shard/vmservice_test.dart

@@ -167,7 +167,7 @@ void main() {
 
   testWithoutContext('setAssetDirectory forwards arguments correctly', () async {
     final MockVMService mockVMService = MockVMService();
-    final FlutterVmService flutterVmService = FlutterVmService(mockVMService);
+    final FlutterVmService flutterVmService = FlutterVmService(mockVMService, logger: BufferLogger.test());
 
     await flutterVmService.setAssetDirectory(
       assetsDirectory: Uri(path: 'abc', scheme: 'file'),
@@ -186,7 +186,7 @@ void main() {
 
   testWithoutContext('setAssetDirectory forwards arguments correctly - windows', () async {
     final MockVMService mockVMService = MockVMService();
-    final FlutterVmService flutterVmService = FlutterVmService(mockVMService);
+    final FlutterVmService flutterVmService = FlutterVmService(mockVMService, logger: BufferLogger.test());
 
     await flutterVmService.setAssetDirectory(
       assetsDirectory: Uri(path: 'C:/Users/Tester/AppData/Local/Temp/hello_worldb42a6da5/hello_world/build/flutter_assets', scheme: 'file'),
@@ -207,7 +207,7 @@ void main() {
 
   testWithoutContext('getSkSLs forwards arguments correctly', () async {
     final MockVMService mockVMService = MockVMService();
-    final FlutterVmService flutterVmService = FlutterVmService(mockVMService);
+    final FlutterVmService flutterVmService = FlutterVmService(mockVMService, logger: BufferLogger.test());
 
     await flutterVmService.getSkSLs(viewId: 'abc');
 
@@ -220,7 +220,7 @@ void main() {
 
   testWithoutContext('flushUIThreadTasks forwards arguments correctly', () async {
     final MockVMService mockVMService = MockVMService();
-    final FlutterVmService flutterVmService = FlutterVmService(mockVMService);
+    final FlutterVmService flutterVmService = FlutterVmService(mockVMService, logger: BufferLogger.test());
 
     await flutterVmService.flushUIThreadTasks(uiIsolateId: 'def');
 

packages/flutter_tools/test/src/fake_vm_services.dart

@@ -4,6 +4,7 @@
 
 import 'dart:async';
 
+import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/convert.dart';
 import 'package:flutter_tools/src/vmservice.dart';
 import 'package:test/test.dart' hide test;
@@ -22,7 +23,7 @@ class FakeVmServiceHost {
     _vmService = FlutterVmService(vm_service.VmService(
       _input.stream,
       _output.add,
-    ), httpAddress: httpAddress, wsAddress: wsAddress);
+    ), httpAddress: httpAddress, wsAddress: wsAddress, logger: BufferLogger.test());
     _applyStreamListen();
     _output.stream.listen((String data) {
       final Map<String, Object?> request = json.decode(data) as Map<String, Object?>;