Bug 1049103 - ensure closing only one child connection when closing a toolbox. r=jryans

browser/devtools/framework/test/browser.ini

@@ -13,6 +13,7 @@ support-files =
 [browser_new_activation_workflow.js]
 [browser_target_events.js]
 [browser_target_remote.js]
+[browser_two_tabs.js]
 [browser_toolbox_dynamic_registration.js]
 [browser_toolbox_highlight.js]
 [browser_toolbox_hosts.js]

browser/devtools/framework/test/browser_two_tabs.js

@@ -0,0 +1,101 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Check regression when opening two tabs
+ */
+
+let { DebuggerServer } =
+  Cu.import("resource://gre/modules/devtools/dbg-server.jsm", {});
+let { DebuggerClient } =
+  Cu.import("resource://gre/modules/devtools/dbg-client.jsm", {});
+let { devtools } =
+  Cu.import("resource://gre/modules/devtools/Loader.jsm", {});
+
+const TAB_URL_1 = "data:text/html;charset=utf-8,foo";
+const TAB_URL_2 = "data:text/html;charset=utf-8,bar";
+
+let gClient;
+let gTab1, gTab2;
+let gTabActor1, gTabActor2;
+
+function test() {
+  waitForExplicitFinish();
+
+  if (!DebuggerServer.initialized) {
+    DebuggerServer.init(() => true);
+    DebuggerServer.addBrowserActors();
+  }
+
+  openTabs();
+}
+
+function openTabs() {
+  // Open two tabs, select the second
+  gTab1 = gBrowser.addTab(TAB_URL_1);
+  gTab1.linkedBrowser.addEventListener("load", function onLoad1(evt) {
+    gTab1.linkedBrowser.removeEventListener("load", onLoad1);
+
+    gTab2 = gBrowser.selectedTab = gBrowser.addTab(TAB_URL_2);
+    gTab2.linkedBrowser.addEventListener("load", function onLoad2(evt) {
+      gTab2.linkedBrowser.removeEventListener("load", onLoad2);
+
+      connect();
+    }, true);
+  }, true);
+}
+
+function connect() {
+  // Connect to debugger server to fetch the two tab actors
+  gClient = new DebuggerClient(DebuggerServer.connectPipe());
+  gClient.connect(() => {
+    gClient.listTabs(response => {
+      // Fetch the tab actors for each tab
+      gTabActor1 = response.tabs.filter(a => a.url === TAB_URL_1)[0];
+      gTabActor2 = response.tabs.filter(a => a.url === TAB_URL_2)[0];
+
+      checkSelectedTabActor();
+    });
+  });
+}
+
+function checkSelectedTabActor() {
+  // Send a naive request to the second tab actor
+  // to check if it works
+  gClient.request({ to: gTabActor2.consoleActor, type: "startListeners", listeners: [] }, aResponse => {
+    ok("startedListeners" in aResponse, "Actor from the selected tab should respond to the request.");
+
+    closeSecondTab();
+  });
+}
+
+function closeSecondTab() {
+  // Close the second tab, currently selected
+  let container = gBrowser.tabContainer;
+  container.addEventListener("TabClose", function onTabClose() {
+    container.removeEventListener("TabClose", onTabClose);
+
+    checkFirstTabActor();
+  });
+  gBrowser.removeTab(gTab2);
+}
+
+function checkFirstTabActor() {
+  // then send a request to the first tab actor
+  // to check if it still works
+  gClient.request({ to: gTabActor1.consoleActor, type: "startListeners", listeners: [] }, aResponse => {
+    ok("startedListeners" in aResponse, "Actor from the first tab should still respond.");
+
+    cleanup();
+  });
+}
+
+function cleanup() {
+  let container = gBrowser.tabContainer;
+  container.addEventListener("TabClose", function onTabClose() {
+    container.removeEventListener("TabClose", onTabClose);
+
+    gClient.close(finish);
+  });
+  gBrowser.removeTab(gTab1);
+}

toolkit/devtools/server/child.js

@@ -13,6 +13,9 @@ let chromeGlobal = this;
   let { devtools } = Cu.import("resource://gre/modules/devtools/Loader.jsm", {});
   const DevToolsUtils = devtools.require("devtools/toolkit/DevToolsUtils.js");
   const {DebuggerServer, ActorPool} = Cu.import("resource://gre/modules/devtools/dbg-server.jsm", {});
+  if (!DebuggerServer.childID) {
+    DebuggerServer.childID = 1;
+  }
 
   if (!DebuggerServer.initialized) {
     DebuggerServer.init();
@@ -24,21 +27,24 @@ let chromeGlobal = this;
   // time we load child.js
   DebuggerServer.addChildActors();
 
-  let conn;
+  let connections = new Map();
 
   let onConnect = DevToolsUtils.makeInfallible(function (msg) {
     removeMessageListener("debug:connect", onConnect);
 
     let mm = msg.target;
+    let prefix = msg.data.prefix;
+    let id = DebuggerServer.childID++;
 
-    conn = DebuggerServer.connectToParent(msg.data.prefix, mm);
+    let conn = DebuggerServer.connectToParent(prefix, mm);
+    connections.set(id, conn);
 
     let actor = new DebuggerServer.ContentActor(conn, chromeGlobal);
     let actorPool = new ActorPool(conn);
     actorPool.addActor(actor);
     conn.addActorPool(actorPool);
 
-    sendAsyncMessage("debug:actor", {actor: actor.grip()});
+    sendAsyncMessage("debug:actor", {actor: actor.grip(), childID: id});
   });
 
   addMessageListener("debug:connect", onConnect);
@@ -49,8 +55,12 @@ let chromeGlobal = this;
     // Call DebuggerServerConnection.close to destroy all child actors
     // (It should end up calling DebuggerServerConnection.onClosed
     // that would actually cleanup all actor pools)
+    let childID = msg.data.childID;
+    let conn = connections.get(childID);
+    if (conn) {
       conn.close();
-    conn = null;
+      connections.delete(childID);
+    }
   });
   addMessageListener("debug:disconnect", onDisconnect);
 })();

toolkit/devtools/server/main.js

@@ -567,11 +567,14 @@ var DebuggerServer = {
 
     let actor, childTransport;
     let prefix = aConnection.allocID("child");
+    let childID = null;
     let netMonitor = null;
 
     let onActorCreated = DevToolsUtils.makeInfallible(function (msg) {
       mm.removeMessageListener("debug:actor", onActorCreated);
 
+      childID = msg.json.childID;
+
       // Pipe Debugger message from/to parent/child via the message manager
       childTransport = new ChildDebuggerTransport(mm, prefix);
       childTransport.hooks = {
@@ -604,7 +607,7 @@ var DebuggerServer = {
           aConnection.cancelForwarding(prefix);
 
           // ... and notify the child process to clean the tab actors.
-          mm.sendAsyncMessage("debug:disconnect");
+          mm.sendAsyncMessage("debug:disconnect", { childID: childID });
         } else {
           // Otherwise, the app has been closed before the actor
           // had a chance to be created, so we are not able to create
@@ -641,7 +644,7 @@ var DebuggerServer = {
         aConnection.cancelForwarding(prefix);
 
         // ... and notify the child process to clean the tab actors.
-        mm.sendAsyncMessage("debug:disconnect");
+        mm.sendAsyncMessage("debug:disconnect", { childID: childID });
       }
     });