Refactor Observatory

runtime/bin/vmservice/client/lib/src/app/isolate.dart

+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+part of app;
+
+/// State for a running isolate.
+class Isolate extends Observable implements ServiceObject {
+  final VM vm;
+  String _id;
+  String _serviceType = 'Isolate';
+  Isolate get isolate => this;
+  String get link => _id;
+  String get id => _id;
+  String get serviceType => _serviceType;
+
+  Isolate(this.vm, this._id);
+
+  /// Refresh [this]. Returns a future which completes to [this].
+  Future refresh() {
+    return vm.fetchMap(_id).then((m) => update(m)).then((_) => this);
+  }
+
+  /// Creates a link to [objectId] relative to [this].
+  String relativeLink(String objectId) => '$id/$objectId';
+  /// Creates a relative link to [objectId] with a '#/' prefix.
+  String hashLink(String objectId) => '#/${relativeLink(objectId)}';
+
+  @observable Profile profile;
+  @observable final Map<String, Script> scripts =
+      toObservable(new Map<String, Script>());
+  @observable final List<Code> codes = new List<Code>();
+  @observable String name;
+  @observable String vmName;
+  @observable Map entry;
+  @observable String rootLib;
+  @observable final Map<String, double> timers =
+      toObservable(new Map<String, double>());
+
+  @observable int newHeapUsed = 0;
+  @observable int oldHeapUsed = 0;
+
+  @observable Map topFrame = null;
+  @observable String fileAndLine = null;
+
+  Isolate.fromId(this.vm, this._id) : name = 'isolate' {}
+
+  Isolate.fromMap(this.vm, Map map)
+      : _id = map['id'], name = map['name'] {
+  }
+
+  void update(Map map) {
+    if (map['type'] != 'Isolate') {
+      Logger.root.severe('Unexpected message type in Isolate.update: ${map["type"]}');
+      return;
+    }
+    if (map['rootLib'] == null ||
+        map['timers'] == null ||
+        map['heap'] == null) {
+      Logger.root.severe("Malformed 'Isolate' response: $map");
+      return;
+    }
+    rootLib = map['rootLib']['id'];
+    vmName = map['name'];
+    if (map['entry'] != null) {
+      entry = map['entry'];
+      name = entry['name'];
+    } else {
+      // fred
+      name = 'root isolate';
+    }
+    if (map['topFrame'] != null) {
+      topFrame = map['topFrame'];
+    }
+
+    var timerMap = {};
+    map['timers'].forEach((timer) {
+        timerMap[timer['name']] = timer['time'];
+      });
+    timers['total'] = timerMap['time_total_runtime'];
+    timers['compile'] = timerMap['time_compilation'];
+    timers['gc'] = 0.0;  // TODO(turnidge): Export this from VM.
+    timers['init'] = (timerMap['time_script_loading'] +
+                      timerMap['time_creating_snapshot'] +
+                      timerMap['time_isolate_initialization'] +
+                      timerMap['time_bootstrap']);
+    timers['dart'] = timerMap['time_dart_execution'];
+
+    newHeapUsed = map['heap']['usedNew'];
+    oldHeapUsed = map['heap']['usedOld'];
+  }
+
+  String toString() => '$id';
+
+  Code findCodeByAddress(int address) {
+    for (var i = 0; i < codes.length; i++) {
+      if (codes[i].contains(address)) {
+        return codes[i];
+      }
+    }
+    return null;
+  }
+
+  Code findCodeByName(String name) {
+    for (var i = 0; i < codes.length; i++) {
+      if (codes[i].name == name) {
+        return codes[i];
+      }
+    }
+    return null;
+  }
+
+  void resetCodeTicks() {
+    Logger.root.info('Reset all code ticks.');
+    for (var i = 0; i < codes.length; i++) {
+      codes[i].resetTicks();
+    }
+  }
+
+  void updateCoverage(List coverages) {
+    for (var coverage in coverages) {
+      var id = coverage['script']['id'];
+      var script = scripts[id];
+      if (script == null) {
+        script = new Script.fromMap(coverage['script']);
+        scripts[id] = script;
+      }
+      assert(script != null);
+      script._processCoverageHits(coverage['hits']);
+    }
+  }
+
+  // TODO(johnmccutchan): Remove this once everything is a ServiceObject.
+  void _setModelResponse(String type, String modelName, dynamic model) {
+    var response = {
+      'type': type,
+      modelName: model
+    };
+    vm.app.setResponse(response);
+  }
+
+  void _setResponseRequestError(HttpRequest request) {
+     String error = '${request.status} ${request.statusText}';
+     if (request.status == 0) {
+       error = 'No service found. Did you run with --enable-vm-service ?';
+     }
+     vm.app.setResponseError(error, 'RequestError');
+   }
+
+  void _requestCatchError(e, st) {
+     if (e is ProgressEvent) {
+       _setResponseRequestError(e.target);
+     } else {
+       vm.app.setResponseError('$e $st');
+     }
+   }
+
+  static final RegExp _codeMatcher = new RegExp(r'/code/');
+  static bool isCodeId(objectId) => _codeMatcher.hasMatch(objectId);
+  static int codeAddressFromRequest(String objectId) {
+    Match m = _codeMatcher.matchAsPrefix(objectId);
+    if (m == null) {
+      return 0;
+    }
+    try {
+      var a = int.parse(m.input.substring(m.end), radix: 16);
+      return a;
+    } catch (e) {
+      return 0;
+    }
+  }
+
+  /// Handle 'Code' requests
+  void _getCode(String objectId) {
+    var address = codeAddressFromRequest(objectId);
+    if (address == 0) {
+      vm.app.setResponseError('$objectId is not a valid code request.');
+      return;
+    }
+    var code = isolate.findCodeByAddress(address);
+    if (code != null) {
+      Logger.root.info(
+          'Found code with 0x${address.toRadixString(16)} in isolate.');
+      _setModelResponse('Code', 'code', code);
+      return;
+    }
+    getMap(objectId).then((map) {
+      assert(map['type'] == 'Code');
+      var code = new Code.fromMap(map);
+      Logger.root.info(
+          'Added code with 0x${address.toRadixString(16)} to isolate.');
+      isolate.codes.add(code);
+      _setModelResponse('Code', 'code', code);
+    }).catchError(_requestCatchError);
+  }
+
+  static final RegExp _scriptMatcher = new RegExp(r'scripts/.+');
+  static bool isScriptId(objectId) => _scriptMatcher.hasMatch(objectId);
+  void _getScript(String objectId) {
+    var script = scripts[objectId];
+    if ((script != null) && !script.needsSource) {
+      Logger.root.info('Found script ${script.scriptRef['name']} in isolate');
+      _setModelResponse('Script', 'script', script);
+      return;
+    }
+    if (script != null) {
+      // The isolate has the script but no script source code.
+      getMap(objectId).then((response) {
+        assert(response['type'] == 'Script');
+        script._processSource(response['source']);
+        Logger.root.info(
+            'Grabbed script ${script.scriptRef['name']} source.');
+        _setModelResponse('Script', 'script', script);
+      });
+      return;
+    }
+    // New script.
+    getMap(objectId).then((response) {
+      assert(response['type'] == 'Script');
+      var script = new Script.fromMap(response);
+      Logger.root.info(
+          'Added script ${script.scriptRef['name']} to isolate.');
+      _setModelResponse('Script', 'script', script);
+      scripts[objectId] = script;
+    });
+  }
+
+  /// Requests [objectId] from [this]. Completes to a [ServiceObject].
+  Future<ServiceObject> get(String objectId) {
+    if (isCodeId(objectId)) {
+      _getCode(objectId);
+      // TODO(johnmccutchan): FIX.
+      return null;
+    }
+    if (isScriptId(objectId)) {
+      _getScript(objectId);
+      // TODO(johnmccutchan): FIX.
+      return null;
+    }
+    return vm.fetchMap(relativeLink(objectId)).then((m) =>
+        upgradeToServiceObject(objectId, m));
+  }
+
+  /// Requests [objectId] from [this]. Completes to a [Map].
+  Future<ObservableMap> getMap(String objectId) {
+    return vm.fetchMap(relativeLink(objectId));
+  }
+
+  /// Upgrades response ([m]) for [objectId] to a [ServiceObject].
+  ServiceObject upgradeToServiceObject(String objectId, Map m) {
+    return new ServiceMap.fromMap(this, m);
+  }
+}