From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 .../source/examples/debug-client/data/client.js    | 816 +++++++++++++++++++++
 .../source/examples/debug-client/data/index.html   |  50 ++
 .../source/examples/debug-client/data/plugin.png   | Bin 0 -> 3819 bytes
 .../source/examples/debug-client/data/task.js      |  28 +
 addon-sdk/source/examples/debug-client/index.js    |  33 +
 .../source/examples/debug-client/package.json      |  10 +
 .../source/examples/debug-client/test/test-main.js |  10 +
 7 files changed, 947 insertions(+)
 create mode 100644 addon-sdk/source/examples/debug-client/data/client.js
 create mode 100644 addon-sdk/source/examples/debug-client/data/index.html
 create mode 100644 addon-sdk/source/examples/debug-client/data/plugin.png
 create mode 100644 addon-sdk/source/examples/debug-client/data/task.js
 create mode 100644 addon-sdk/source/examples/debug-client/index.js
 create mode 100644 addon-sdk/source/examples/debug-client/package.json
 create mode 100644 addon-sdk/source/examples/debug-client/test/test-main.js

(limited to 'addon-sdk/source/examples/debug-client')

diff --git a/addon-sdk/source/examples/debug-client/data/client.js b/addon-sdk/source/examples/debug-client/data/client.js
new file mode 100644
index 000000000..022f9a1c3
--- /dev/null
+++ b/addon-sdk/source/examples/debug-client/data/client.js
@@ -0,0 +1,816 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+(function(exports) {
+"use strict";
+
+
+var describe = Object.getOwnPropertyDescriptor;
+var Class = fields => {
+  var constructor = fields.constructor || function() {};
+  var ancestor = fields.extends || Object;
+
+
+
+  var descriptor = {};
+  for (var key of Object.keys(fields))
+    descriptor[key] = describe(fields, key);
+
+  var prototype = Object.create(ancestor.prototype, descriptor);
+
+  constructor.prototype = prototype;
+  prototype.constructor = constructor;
+
+  return constructor;
+};
+
+
+var bus = function Bus() {
+  var parser = new DOMParser();
+  return parser.parseFromString("<EventTarget/>", "application/xml").documentElement;
+}();
+
+var GUID = new WeakMap();
+GUID.id = 0;
+var guid = x => GUID.get(x);
+var setGUID = x => {
+  GUID.set(x, ++ GUID.id);
+};
+
+var Emitter = Class({
+  extends: EventTarget,
+  constructor: function() {
+   this.setupEmitter();
+  },
+  setupEmitter: function() {
+    setGUID(this);
+  },
+  addEventListener: function(type, listener, capture) {
+    bus.addEventListener(type + "@" + guid(this),
+                         listener, capture);
+  },
+  removeEventListener: function(type, listener, capture) {
+    bus.removeEventListener(type + "@" + guid(this),
+                            listener, capture);
+  }
+});
+
+function dispatch(target, type, data) {
+  var event = new MessageEvent(type + "@" + guid(target), {
+    bubbles: true,
+    cancelable: false,
+    data: data
+  });
+  bus.dispatchEvent(event);
+}
+
+var supervisedWorkers = new WeakMap();
+var supervised = supervisor => {
+  if (!supervisedWorkers.has(supervisor)) {
+    supervisedWorkers.set(supervisor, new Map());
+    supervisor.connection.addActorPool(supervisor);
+  }
+  return supervisedWorkers.get(supervisor);
+};
+
+var Supervisor = Class({
+  extends: Emitter,
+  constructor: function(...params) {
+    this.setupEmitter(...params);
+    this.setupSupervisor(...params);
+  },
+  Supervisor: function(connection) {
+    this.connection = connection;
+  },
+  /**
+   * Return the parent pool for this client.
+   */
+  supervisor: function() {
+    return this.connection.poolFor(this.actorID);
+  },
+  /**
+   * Override this if you want actors returned by this actor
+   * to belong to a different actor by default.
+   */
+  marshallPool: function() { return this; },
+    /**
+   * Add an actor as a child of this pool.
+   */
+  supervise: function(actor) {
+    if (!actor.actorID)
+      actor.actorID = this.connection.allocID(actor.actorPrefix ||
+                                              actor.typeName);
+
+    supervised(this).set(actor.actorID, actor);
+    return actor;
+  },
+  /**
+   * Remove an actor as a child of this pool.
+   */
+  abandon: function(actor) {
+    supervised(this).delete(actor.actorID);
+  },
+  // true if the given actor ID exists in the pool.
+  has: function(actorID) {
+    return supervised(this).has(actorID);
+  },
+  // Same as actor, should update debugger connection to use 'actor'
+  // and then remove this.
+  get: function(actorID) {
+    return supervised(this).get(actorID);
+  },
+  actor: function(actorID) {
+    return supervised(this).get(actorID);
+  },
+  isEmpty: function() {
+    return supervised(this).size === 0;
+  },
+  /**
+   * For getting along with the debugger server pools, should be removable
+   * eventually.
+   */
+  cleanup: function() {
+    this.destroy();
+  },
+  destroy: function() {
+    var supervisor = this.supervisor();
+    if (supervisor)
+      supervisor.abandon(this);
+
+    for (var actor of supervised(this).values()) {
+      if (actor !== this) {
+        var destroy = actor.destroy;
+        // Disconnect destroy while we're destroying in case of (misbehaving)
+        // circular ownership.
+        if (destroy) {
+          actor.destroy = null;
+          destroy.call(actor);
+          actor.destroy = destroy;
+        }
+      }
+    }
+
+    this.connection.removeActorPool(this);
+    supervised(this).clear();
+  }
+
+});
+
+
+
+
+var mailbox = new WeakMap();
+var clientRequests = new WeakMap();
+
+var inbox = client => mailbox.get(client).inbox;
+var outbox = client => mailbox.get(client).outbox;
+var requests = client => clientRequests.get(client);
+
+
+var Receiver = Class({
+  receive: function(packet) {
+    if (packet.error)
+      this.reject(packet.error);
+    else
+      this.resolve(this.read(packet));
+  }
+});
+
+var Connection = Class({
+  constructor: function() {
+    // Queue of the outgoing messages.
+    this.outbox = [];
+    // Map of pending requests.
+    this.pending = new Map();
+    this.pools = new Set();
+  },
+  isConnected: function() {
+    return !!this.port
+  },
+  connect: function(port) {
+    this.port = port;
+    port.addEventListener("message", this);
+    port.start();
+
+    this.flush();
+  },
+  addPool: function(pool) {
+    this.pools.add(pool);
+  },
+  removePool: function(pool) {
+    this.pools.delete(pool);
+  },
+  poolFor: function(id) {
+    for (let pool of this.pools.values()) {
+      if (pool.has(id))
+        return pool;
+    }
+  },
+  get: function(id) {
+    var pool = this.poolFor(id);
+    return pool && pool.get(id);
+  },
+  disconnect: function() {
+    this.port.stop();
+    this.port = null;
+    for (var request of this.pending.values()) {
+      request.catch(new Error("Connection closed"));
+    }
+    this.pending.clear();
+
+    var requests = this.outbox.splice(0);
+    for (var request of request) {
+      requests.catch(new Error("Connection closed"));
+    }
+  },
+  handleEvent: function(event) {
+    this.receive(event.data);
+  },
+  flush: function() {
+    if (this.isConnected()) {
+      for (var request of this.outbox) {
+        if (!this.pending.has(request.to)) {
+          this.outbox.splice(this.outbox.indexOf(request), 1);
+          this.pending.set(request.to, request);
+          this.send(request.packet);
+        }
+      }
+    }
+  },
+  send: function(packet) {
+    this.port.postMessage(packet);
+  },
+  request: function(packet) {
+    return new Promise(function(resolve, reject) {
+      this.outbox.push({
+        to: packet.to,
+        packet: packet,
+        receive: resolve,
+        catch: reject
+      });
+      this.flush();
+    });
+  },
+  receive: function(packet) {
+    var { from, type, why } = packet;
+    var receiver = this.pending.get(from);
+    if (!receiver) {
+      console.warn("Unable to handle received packet", data);
+    } else {
+      this.pending.delete(from);
+      if (packet.error)
+        receiver.catch(packet.error);
+      else
+        receiver.receive(packet);
+    }
+    this.flush();
+  },
+});
+
+/**
+ * Base class for client-side actor fronts.
+ */
+var Client = Class({
+  extends: Supervisor,
+  constructor: function(from=null, detail=null, connection=null) {
+    this.Client(from, detail, connection);
+  },
+  Client: function(form, detail, connection) {
+    this.Supervisor(connection);
+
+    if (form) {
+      this.actorID = form.actor;
+      this.from(form, detail);
+    }
+  },
+  connect: function(port) {
+    this.connection = new Connection(port);
+  },
+  actorID: null,
+  actor: function() {
+    return this.actorID;
+  },
+  /**
+   * Update the actor from its representation.
+   * Subclasses should override this.
+   */
+  form: function(form) {
+  },
+  /**
+   * Method is invokeid when packet received constitutes an
+   * event. By default such packets are demarshalled and
+   * dispatched on the client instance.
+   */
+  dispatch: function(packet) {
+  },
+  /**
+   * Method is invoked when packet is returned in response to
+   * a request. By default respond delivers response to a first
+   * request in a queue.
+   */
+  read: function(input) {
+    throw new TypeError("Subclass must implement read method");
+  },
+  write: function(input) {
+    throw new TypeError("Subclass must implement write method");
+  },
+  respond: function(packet) {
+    var [resolve, reject] = requests(this).shift();
+    if (packet.error)
+      reject(packet.error);
+    else
+      resolve(this.read(packet));
+  },
+  receive: function(packet) {
+    if (this.isEventPacket(packet)) {
+      this.dispatch(packet);
+    }
+    else if (requests(this).length) {
+      this.respond(packet);
+    }
+    else {
+      this.catch(packet);
+    }
+  },
+  send: function(packet) {
+    Promise.cast(packet.to || this.actor()).then(id => {
+      packet.to = id;
+      this.connection.send(packet);
+    })
+  },
+  request: function(packet) {
+    return this.connection.request(packet);
+  }
+});
+
+
+var Destructor = method => {
+  return function(...args) {
+    return method.apply(this, args).then(result => {
+      this.destroy();
+      return result;
+    });
+  };
+};
+
+var Profiled = (method, id) => {
+  return function(...args) {
+    var start = new Date();
+    return method.apply(this, args).then(result => {
+      var end = new Date();
+      this.telemetry.add(id, +end - start);
+      return result;
+    });
+  };
+};
+
+var Method = (request, response) => {
+  return response ? new BidirectionalMethod(request, response) :
+         new UnidirecationalMethod(request);
+};
+
+var UnidirecationalMethod = request => {
+  return function(...args) {
+    var packet = request.write(args, this);
+    this.connection.send(packet);
+    return Promise.resolve(void(0));
+  };
+};
+
+var BidirectionalMethod = (request, response) => {
+  return function(...args) {
+    var packet = request.write(args, this);
+    return this.connection.request(packet).then(packet => {
+      return response.read(packet, this);
+    });
+  };
+};
+
+
+Client.from = ({category, typeName, methods, events}) => {
+  var proto = {
+    constructor: function(...args) {
+      this.Client(...args);
+    },
+    extends: Client,
+    name: typeName
+  };
+
+  methods.forEach(({telemetry, request, response, name, oneway, release}) => {
+    var [reader, writer] = oneway ? [, new Request(request)] :
+                           [new Request(request), new Response(response)];
+    var method = new Method(request, response);
+    var profiler = telemetry ? new Profiler(method) : method;
+    var destructor = release ? new Destructor(profiler) : profiler;
+    proto[name] = destructor;
+  });
+
+  return Class(proto);
+};
+
+
+var defineType = (client, descriptor) => {
+  var type = void(0)
+  if (typeof(descriptor) === "string") {
+    if (name.indexOf(":") > 0)
+      type = makeCompoundType(descriptor);
+    else if (name.indexOf("#") > 0)
+      type = new ActorDetail(descriptor);
+    else if (client.specification[descriptor])
+      type = makeCategoryType(client.specification[descriptor]);
+  } else {
+    type = makeCategoryType(descriptor);
+  }
+
+  if (type)
+    client.types.set(type.name, type);
+  else
+    throw TypeError("Invalid type: " + descriptor);
+};
+
+
+var makeCompoundType = name => {
+  var index = name.indexOf(":");
+  var [baseType, subType] = [name.slice(0, index), parts.slice(1)];
+  return baseType === "array" ? new ArrayOf(subType) :
+         baseType === "nullable" ? new Maybe(subType) :
+         null;
+};
+
+var makeCategoryType = (descriptor) => {
+  var { category } = descriptor;
+  return category === "dict" ? new Dictionary(descriptor) :
+         category === "actor" ? new Actor(descriptor) :
+         null;
+};
+
+
+var typeFor = (client, type="primitive") => {
+  if (!client.types.has(type))
+    defineType(client, type);
+
+  return client.types.get(type);
+};
+
+
+var Client = Class({
+  constructor: function() {
+  },
+  setupTypes: function(specification) {
+    this.specification = specification;
+    this.types = new Map();
+  },
+  read: function(input, type) {
+    return typeFor(this, type).read(input, this);
+  },
+  write: function(input, type) {
+    return typeFor(this, type).write(input, this);
+  }
+});
+
+
+var Type = Class({
+  get name() {
+    return this.category ? this.category + ":" + this.type :
+           this.type;
+  },
+  read: function(input, client) {
+    throw new TypeError("`Type` subclass must implement `read`");
+  },
+  write: function(input, client) {
+    throw new TypeError("`Type` subclass must implement `write`");
+  }
+});
+
+
+var Primitve = Class({
+  extends: Type,
+  constuctor: function(type) {
+    this.type = type;
+  },
+  read: function(input, client) {
+    return input;
+  },
+  write: function(input, client) {
+    return input;
+  }
+});
+
+var Maybe = Class({
+  extends: Type,
+  category: "nullable",
+  constructor: function(type) {
+    this.type = type;
+  },
+  read: function(input, client) {
+    return input === null ? null :
+           input === void(0) ? void(0) :
+           client.read(input, this.type);
+  },
+  write: function(input, client) {
+    return input === null ? null :
+           input === void(0) ? void(0) :
+           client.write(input, this.type);
+  }
+});
+
+var ArrayOf = Class({
+  extends: Type,
+  category: "array",
+  constructor: function(type) {
+    this.type = type;
+  },
+  read: function(input, client) {
+    return input.map($ => client.read($, this.type));
+  },
+  write: function(input, client) {
+    return input.map($ => client.write($, this.type));
+  }
+});
+
+var Dictionary = Class({
+  exteds: Type,
+  category: "dict",
+  get name() { return this.type; },
+  constructor: function({typeName, specializations}) {
+    this.type = typeName;
+    this.types = specifications;
+  },
+  read: function(input, client) {
+    var output = {};
+    for (var key in input) {
+      output[key] = client.read(input[key], this.types[key]);
+    }
+    return output;
+  },
+  write: function(input, client) {
+    var output = {};
+    for (var key in input) {
+      output[key] = client.write(value, this.types[key]);
+    }
+    return output;
+  }
+});
+
+var Actor = Class({
+  exteds: Type,
+  category: "actor",
+  get name() { return this.type; },
+  constructor: function({typeName}) {
+    this.type = typeName;
+  },
+  read: function(input, client, detail) {
+    var id = value.actor;
+    var actor = void(0);
+    if (client.connection.has(id)) {
+      return client.connection.get(id).form(input, detail, client);
+    } else {
+      actor = Client.from(detail, client);
+      actor.actorID = id;
+      client.supervise(actor);
+    }
+  },
+  write: function(input, client, detail) {
+    if (input instanceof Actor) {
+      if (!input.actorID) {
+        client.supervise(input);
+      }
+      return input.from(detail);
+    }
+    return input.actorID;
+  }
+});
+
+var Root = Client.from({
+  "category": "actor",
+  "typeName": "root",
+  "methods": [
+    {"name": "listTabs",
+     "request": {},
+     "response": {
+     }
+    },
+    {"name": "listAddons"
+    },
+    {"name": "echo",
+
+    },
+    {"name": "protocolDescription",
+
+    }
+  ]
+});
+
+
+var ActorDetail = Class({
+  extends: Actor,
+  constructor: function(name, actor, detail) {
+    this.detail = detail;
+    this.actor = actor;
+  },
+  read: function(input, client) {
+    this.actor.read(input, client, this.detail);
+  },
+  write: function(input, client) {
+    this.actor.write(input, client, this.detail);
+  }
+});
+
+var registeredLifetimes = new Map();
+var LifeTime = Class({
+  extends: Type,
+  category: "lifetime",
+  constructor: function(lifetime, type) {
+    this.name = lifetime + ":" + type.name;
+    this.field = registeredLifetimes.get(lifetime);
+  },
+  read: function(input, client) {
+    return this.type.read(input, client[this.field]);
+  },
+  write: function(input, client) {
+    return this.type.write(input, client[this.field]);
+  }
+});
+
+var primitive = new Primitve("primitive");
+var string = new Primitve("string");
+var number = new Primitve("number");
+var boolean = new Primitve("boolean");
+var json = new Primitve("json");
+var array = new Primitve("array");
+
+
+var TypedValue = Class({
+  extends: Type,
+  constructor: function(name, type) {
+    this.TypedValue(name, type);
+  },
+  TypedValue: function(name, type) {
+    this.name = name;
+    this.type = type;
+  },
+  read: function(input, client) {
+    return this.client.read(input, this.type);
+  },
+  write: function(input, client) {
+    return this.client.write(input, this.type);
+  }
+});
+
+var Return = Class({
+  extends: TypedValue,
+  constructor: function(type) {
+    this.type = type
+  }
+});
+
+var Argument = Class({
+  extends: TypedValue,
+  constructor: function(...args) {
+    this.Argument(...args);
+  },
+  Argument: function(index, type) {
+    this.index = index;
+    this.TypedValue("argument[" + index + "]", type);
+  },
+  read: function(input, client, target) {
+    return target[this.index] = client.read(input, this.type);
+  }
+});
+
+var Option = Class({
+  extends: Argument,
+  constructor: function(...args) {
+    return this.Argument(...args);
+  },
+  read: function(input, client, target, name) {
+    var param = target[this.index] || (target[this.index] = {});
+    param[name] = input === void(0) ? input : client.read(input, this.type);
+  },
+  write: function(input, client, name) {
+    var value = input && input[name];
+    return value === void(0) ? value : client.write(value, this.type);
+  }
+});
+
+var Request = Class({
+  extends: Type,
+  constructor: function(template={}) {
+    this.type = template.type;
+    this.template = template;
+    this.params = findPlaceholders(template, Argument);
+  },
+  read: function(packet, client) {
+    var args = [];
+    for (var param of this.params) {
+      var {placeholder, path} = param;
+      var name = path[path.length - 1];
+      placeholder.read(getPath(packet, path), client, args, name);
+      // TODO:
+      // args[placeholder.index] = placeholder.read(query(packet, path), client);
+    }
+    return args;
+  },
+  write: function(input, client) {
+    return JSON.parse(JSON.stringify(this.template, (key, value) => {
+      return value instanceof Argument ? value.write(input[value.index],
+                                                     client, key) :
+             value;
+    }));
+  }
+});
+
+var Response = Class({
+  extends: Type,
+  constructor: function(template={}) {
+    this.template = template;
+    var [x] = findPlaceholders(template, Return);
+    var {placeholder, path} = x;
+    this.return = placeholder;
+    this.path = path;
+  },
+  read: function(packet, client) {
+    var value = query(packet, this.path);
+    return this.return.read(value, client);
+  },
+  write: function(input, client) {
+    return JSON.parse(JSON.stringify(this.template, (key, value) => {
+      return value instanceof Return ? value.write(input) :
+             input
+    }));
+  }
+});
+
+// Returns array of values for the given object.
+var values = object => Object.keys(object).map(key => object[key]);
+// Returns [key, value] pairs for the given object.
+var pairs = object => Object.keys(object).map(key => [key, object[key]]);
+// Queries an object for the field nested with in it.
+var query = (object, path) => path.reduce((object, entry) => object && object[entry],
+                                          object);
+
+
+var Root = Client.from({
+  "category": "actor",
+  "typeName": "root",
+  "methods": [
+    {
+      "name": "echo",
+      "request": {
+        "string": { "_arg": 0, "type": "string" }
+      },
+      "response": {
+        "string": { "_retval": "string" }
+      }
+    },
+    {
+      "name": "listTabs",
+      "request": {},
+      "response": { "_retval": "tablist" }
+    },
+    {
+      "name": "actorDescriptions",
+      "request": {},
+      "response": { "_retval": "json" }
+    }
+  ],
+  "events": {
+    "tabListChanged": {}
+  }
+});
+
+var Tab = Client.from({
+  "category": "dict",
+  "typeName": "tab",
+  "specifications": {
+    "title": "string",
+    "url": "string",
+    "outerWindowID": "number",
+    "console": "console",
+    "inspectorActor": "inspector",
+    "callWatcherActor": "call-watcher",
+    "canvasActor": "canvas",
+    "webglActor": "webgl",
+    "webaudioActor": "webaudio",
+    "styleSheetsActor": "stylesheets",
+    "styleEditorActor": "styleeditor",
+    "storageActor": "storage",
+    "gcliActor": "gcli",
+    "memoryActor": "memory",
+    "eventLoopLag": "eventLoopLag",
+
+    "trace": "trace", // missing
+  }
+});
+
+var tablist = Client.from({
+  "category": "dict",
+  "typeName": "tablist",
+  "specializations": {
+    "selected": "number",
+    "tabs": "array:tab"
+  }
+});
+
+})(this);
+
diff --git a/addon-sdk/source/examples/debug-client/data/index.html b/addon-sdk/source/examples/debug-client/data/index.html
new file mode 100644
index 000000000..7788e3580
--- /dev/null
+++ b/addon-sdk/source/examples/debug-client/data/index.html
@@ -0,0 +1,50 @@
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+<html>
+  <head>
+      <script src="resource://sdk/dev/volcan.js"></script>
+      <script src="./task.js"></script>
+  </head>
+  <body>
+  </body>
+  <script>
+    const wait = (target, type, capture) => new Promise((resolve, reject) => {
+      const listener = event => {
+        target.removeEventListener(type, listener, capture);
+        resolve(event);
+      };
+      target.addEventListener(type, listener, capture);
+    });
+
+    const display = message =>
+      document.body.innerHTML += message + "<br/>";
+
+    Task.spawn(function*() {
+      var event = yield wait(window, "message");
+      var port = event.ports[0];
+
+      display("Port received");
+      var root = yield volcan.connect(port);
+
+      display("Connected to a debugger");
+
+      var message = yield root.echo("hello")
+
+      display("Received echo for: " + message);
+
+      var list = yield root.listTabs();
+
+      display("You have " + list.tabs.length + " open tabs");
+
+      var activeTab = list.tabs[list.selected];
+
+      display("Your active tab url is: " + activeTab.url);
+
+      var sheets = yield activeTab.styleSheetsActor.getStyleSheets();
+
+      display("Page in active tab has " + sheets.length + " stylesheets");
+
+    });
+  </script>
+</html>
diff --git a/addon-sdk/source/examples/debug-client/data/plugin.png b/addon-sdk/source/examples/debug-client/data/plugin.png
new file mode 100644
index 000000000..6a364a30a
Binary files /dev/null and b/addon-sdk/source/examples/debug-client/data/plugin.png differ
diff --git a/addon-sdk/source/examples/debug-client/data/task.js b/addon-sdk/source/examples/debug-client/data/task.js
new file mode 100644
index 000000000..b46feb10e
--- /dev/null
+++ b/addon-sdk/source/examples/debug-client/data/task.js
@@ -0,0 +1,28 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+(function(exports) {
+"use strict";
+
+const spawn = (task, ...args) => {
+  return new Promise((resolve, reject) => {
+    try {
+      const routine = task(...args);
+      const raise = error => routine.throw(error);
+      const step = data => {
+        const { done, value } = routine.next(data);
+        if (done)
+          resolve(value);
+        else
+          Promise.resolve(value).then(step, raise);
+      }
+      step();
+    } catch(error) {
+      reject(error);
+    }
+  });
+}
+exports.spawn = spawn;
+
+})(Task = {});
diff --git a/addon-sdk/source/examples/debug-client/index.js b/addon-sdk/source/examples/debug-client/index.js
new file mode 100644
index 000000000..ff91ff8cd
--- /dev/null
+++ b/addon-sdk/source/examples/debug-client/index.js
@@ -0,0 +1,33 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+const { Panel } = require("dev/panel");
+const { Tool } = require("dev/toolbox");
+const { Class } = require("sdk/core/heritage");
+
+
+const LadybugPanel = Class({
+  extends: Panel,
+  label: "Ladybug",
+  tooltip: "Debug client example",
+  icon: "./plugin.png",
+  url: "./index.html",
+  setup: function({debuggee}) {
+    this.debuggee = debuggee;
+  },
+  dispose: function() {
+    delete this.debuggee;
+  },
+  onReady: function() {
+    this.debuggee.start();
+    this.postMessage("RDP", [this.debuggee]);
+  },
+});
+exports.LadybugPanel = LadybugPanel;
+
+
+const ladybug = new Tool({
+  panels: { ladybug: LadybugPanel }
+});
diff --git a/addon-sdk/source/examples/debug-client/package.json b/addon-sdk/source/examples/debug-client/package.json
new file mode 100644
index 000000000..058fa97af
--- /dev/null
+++ b/addon-sdk/source/examples/debug-client/package.json
@@ -0,0 +1,10 @@
+{
+  "name": "debug-client",
+  "id": "@debug-client",
+  "title": "Debug client",
+  "description": "Example debug client",
+  "version": "0.0.1",
+  "author": "Irakli Gozalishvili",
+  "main": "./index.js",
+  "license": "MPL-2.0"
+}
diff --git a/addon-sdk/source/examples/debug-client/test/test-main.js b/addon-sdk/source/examples/debug-client/test/test-main.js
new file mode 100644
index 000000000..9862fc20b
--- /dev/null
+++ b/addon-sdk/source/examples/debug-client/test/test-main.js
@@ -0,0 +1,10 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+ "use strict";
+
+exports.testMain = function(assert) {
+  assert.pass("TODO: Write some tests.");
+};
+
+require("sdk/test").run(exports);
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