1 files changed, 127 insertions, 0 deletions
diff --git a/devtools/server/child.js b/devtools/server/child.js
new file mode 100644
index 000000000..e2838f08d
--- /dev/null
+++ b/devtools/server/child.js
@@ -0,0 +1,127 @@
+/* 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";
+
+/* global addEventListener, addMessageListener, removeMessageListener, sendAsyncMessage */
+
+try {
+  var chromeGlobal = this;
+
+  // Encapsulate in its own scope to allows loading this frame script more than once.
+  (function () {
+    const Cu = Components.utils;
+    const { require } = Cu.import("resource://devtools/shared/Loader.jsm", {});
+
+    const DevToolsUtils = require("devtools/shared/DevToolsUtils");
+    const { dumpn } = DevToolsUtils;
+    const { DebuggerServer, ActorPool } = require("devtools/server/main");
+
+    if (!DebuggerServer.initialized) {
+      DebuggerServer.init();
+      // For non-e10s mode, there is only one server instance, so be sure the browser
+      // actors get loaded.
+      DebuggerServer.addBrowserActors();
+    }
+
+    // In case of apps being loaded in parent process, DebuggerServer is already
+    // initialized, but child specific actors are not registered. Otherwise, for apps in
+    // child process, we need to load actors the first time we load child.js.
+    DebuggerServer.addChildActors();
+
+    let connections = new Map();
+
+    let onConnect = DevToolsUtils.makeInfallible(function (msg) {
+      removeMessageListener("debug:connect", onConnect);
+
+      let mm = msg.target;
+      let prefix = msg.data.prefix;
+
+      let conn = DebuggerServer.connectToParent(prefix, mm);
+      conn.parentMessageManager = mm;
+      connections.set(prefix, conn);
+
+      let actor = new DebuggerServer.ContentActor(conn, chromeGlobal, prefix);
+      let actorPool = new ActorPool(conn);
+      actorPool.addActor(actor);
+      conn.addActorPool(actorPool);
+
+      sendAsyncMessage("debug:actor", {actor: actor.form(), prefix: prefix});
+    });
+
+    addMessageListener("debug:connect", onConnect);
+
+    // Allows executing module setup helper from the parent process.
+    // See also: DebuggerServer.setupInChild()
+    let onSetupInChild = DevToolsUtils.makeInfallible(msg => {
+      let { module, setupChild, args } = msg.data;
+      let m;
+
+      try {
+        m = require(module);
+
+        if (!setupChild in m) {
+          dumpn(`ERROR: module '${module}' does not export '${setupChild}'`);
+          return false;
+        }
+
+        m[setupChild].apply(m, args);
+      } catch (e) {
+        let errorMessage =
+          "Exception during actor module setup running in the child process: ";
+        DevToolsUtils.reportException(errorMessage + e);
+        dumpn(`ERROR: ${errorMessage}\n\t module: '${module}'\n\t ` +
+              `setupChild: '${setupChild}'\n${DevToolsUtils.safeErrorString(e)}`);
+        return false;
+      }
+      if (msg.data.id) {
+        // Send a message back to know when it is processed
+        sendAsyncMessage("debug:setup-in-child-response", {id: msg.data.id});
+      }
+      return true;
+    });
+
+    addMessageListener("debug:setup-in-child", onSetupInChild);
+
+    let onDisconnect = DevToolsUtils.makeInfallible(function (msg) {
+      let prefix = msg.data.prefix;
+      let conn = connections.get(prefix);
+      if (!conn) {
+        // Several copies of this frame script can be running for a single frame since it
+        // is loaded once for each DevTools connection to the frame.  If this disconnect
+        // request doesn't match a connection known here, ignore it.
+        return;
+      }
+
+      removeMessageListener("debug:disconnect", onDisconnect);
+      // Call DebuggerServerConnection.close to destroy all child actors. It should end up
+      // calling DebuggerServerConnection.onClosed that would actually cleanup all actor
+      // pools.
+      conn.close();
+      connections.delete(prefix);
+    });
+    addMessageListener("debug:disconnect", onDisconnect);
+
+    // In non-e10s mode, the "debug:disconnect" message isn't always received before the
+    // messageManager connection goes away.  Watching for "unload" here ensures we close
+    // any connections when the frame is unloaded.
+    addEventListener("unload", () => {
+      for (let conn of connections.values()) {
+        conn.close();
+      }
+      connections.clear();
+    });
+
+    let onInspect = DevToolsUtils.makeInfallible(function (msg) {
+      // Store the node to be inspected in a global variable (gInspectingNode). Later
+      // we'll fetch this variable again using the findInspectingNode request over the
+      // remote debugging protocol.
+      let inspector = require("devtools/server/actors/inspector");
+      inspector.setInspectingNode(msg.objects.node);
+    });
+    addMessageListener("debug:inspect", onInspect);
+  })();
+} catch (e) {
+  dump(`Exception in app child process: ${e}\n`);
+}