Propagate privacy information of iframes to corresponding pipelines. Make iframes of differing privacy values be considered cross-origin.

Make the constellation hand out separate private and public channels for the pipeline content to communicate with the resource thread as necessary.

components/constellation/constellation.rs

@@ -108,7 +108,10 @@ pub struct Constellation<Message, LTF, STF> {
     compositor_proxy: Box<CompositorProxy>,
 
     /// Channels through which messages can be sent to the resource-related threads.
-    resource_threads: ResourceThreads,
+    public_resource_threads: ResourceThreads,
+
+    /// Channels through which messages can be sent to the resource-related threads.
+    private_resource_threads: ResourceThreads,
 
     /// A channel through which messages can be sent to the image cache thread.
     image_cache_thread: ImageCacheThread,
@@ -201,7 +204,9 @@ pub struct InitialConstellationState {
     /// A channel to the font cache thread.
     pub font_cache_thread: FontCacheThread,
     /// A channel to the resource thread.
-    pub resource_threads: ResourceThreads,
+    pub public_resource_threads: ResourceThreads,
+    /// A channel to the resource thread.
+    pub private_resource_threads: ResourceThreads,
     /// A channel to the time profiler thread.
     pub time_profiler_chan: time::ProfilerChan,
     /// A channel to the memory profiler thread.
@@ -331,7 +336,8 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
                 compositor_proxy: state.compositor_proxy,
                 devtools_chan: state.devtools_chan,
                 bluetooth_thread: state.bluetooth_thread,
-                resource_threads: state.resource_threads,
+                public_resource_threads: state.public_resource_threads,
+                private_resource_threads: state.private_resource_threads,
                 image_cache_thread: state.image_cache_thread,
                 font_cache_thread: state.font_cache_thread,
                 pipelines: HashMap::new(),
@@ -404,9 +410,16 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
                     parent_info: Option<(PipelineId, SubpageId, FrameType)>,
                     initial_window_size: Option<TypedSize2D<PagePx, f32>>,
                     script_channel: Option<IpcSender<ConstellationControlMsg>>,
-                    load_data: LoadData) {
+                    load_data: LoadData,
+                    is_private: bool) {
         if self.shutting_down { return; }
 
+        let resource_threads = if is_private {
+            self.private_resource_threads.clone()
+        } else {
+            self.public_resource_threads.clone()
+        };
+
         let parent_visibility = if let Some((parent_pipeline_id, _, _)) = parent_info {
             self.pipelines.get(&parent_pipeline_id).map(|pipeline| pipeline.visible)
         } else {
@@ -425,7 +438,7 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
             bluetooth_thread: self.bluetooth_thread.clone(),
             image_cache_thread: self.image_cache_thread.clone(),
             font_cache_thread: self.font_cache_thread.clone(),
-            resource_threads: self.resource_threads.clone(),
+            resource_threads: resource_threads,
             time_profiler_chan: self.time_profiler_chan.clone(),
             mem_profiler_chan: self.mem_profiler_chan.clone(),
             window_size: initial_window_size,
@@ -435,6 +448,7 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
             pipeline_namespace_id: self.next_pipeline_namespace_id(),
             parent_visibility: parent_visibility,
             webrender_api_sender: self.webrender_api_sender.clone(),
+            is_private: is_private,
         });
 
         let (pipeline, child_process) = match result {
@@ -850,7 +864,7 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
         self.image_cache_thread.exit();
 
         debug!("Exiting core resource threads.");
-        if let Err(e) = self.resource_threads.send(net_traits::CoreResourceMsg::Exit(core_sender)) {
+        if let Err(e) = self.public_resource_threads.send(net_traits::CoreResourceMsg::Exit(core_sender)) {
             warn!("Exit resource thread failed ({})", e);
         }
 
@@ -863,12 +877,12 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
         }
 
         debug!("Exiting storage resource threads.");
-        if let Err(e) = self.resource_threads.send(StorageThreadMsg::Exit(storage_sender)) {
+        if let Err(e) = self.public_resource_threads.send(StorageThreadMsg::Exit(storage_sender)) {
             warn!("Exit storage thread failed ({})", e);
         }
 
         debug!("Exiting file manager resource threads.");
-        if let Err(e) = self.resource_threads.send(FileManagerThreadMsg::Exit) {
+        if let Err(e) = self.public_resource_threads.send(FileManagerThreadMsg::Exit) {
             warn!("Exit storage thread failed ({})", e);
         }
 
@@ -951,7 +965,7 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
 
             let new_pipeline_id = PipelineId::new();
             let load_data = LoadData::new(failure_url, None, None);
-            self.new_pipeline(new_pipeline_id, parent_info, window_size, None, load_data);
+            self.new_pipeline(new_pipeline_id, parent_info, window_size, None, load_data, false);
 
             self.push_pending_frame(new_pipeline_id, Some(pipeline_id));
 
@@ -965,7 +979,7 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
         let root_pipeline_id = PipelineId::new();
         debug_assert!(PipelineId::fake_root_pipeline_id() == root_pipeline_id);
         self.new_pipeline(root_pipeline_id, None, Some(window_size), None,
-                          LoadData::new(url.clone(), None, None));
+                          LoadData::new(url.clone(), None, None), false);
         self.handle_load_start_msg(&root_pipeline_id);
         self.push_pending_frame(root_pipeline_id, None);
         self.compositor_proxy.send(ToCompositorMsg::ChangePageUrl(root_pipeline_id, url));
@@ -1030,7 +1044,7 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
             .and_then(|old_subpage_id| self.subpage_map.get(&(load_info.containing_pipeline_id, old_subpage_id)))
             .cloned();
 
-        let (load_data, script_chan, window_size) = {
+        let (load_data, script_chan, window_size, is_private) = {
             let old_pipeline = old_pipeline_id
                 .and_then(|old_pipeline_id| self.pipelines.get(&old_pipeline_id));
 
@@ -1054,11 +1068,14 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
             // then reuse the script thread in creating the new pipeline
             let source_url = &source_pipeline.url;
 
+            let is_private = load_info.is_private || source_pipeline.is_private;
+
             // FIXME(#10968): this should probably match the origin check in
             //                HTMLIFrameElement::contentDocument.
             let same_script = source_url.host() == load_data.url.host() &&
                               source_url.port() == load_data.url.port() &&
-                              load_info.sandbox == IFrameSandboxState::IFrameUnsandboxed;
+                              load_info.sandbox == IFrameSandboxState::IFrameUnsandboxed &&
+                              source_pipeline.is_private == is_private;
 
             // Reuse the script thread if the URL is same-origin
             let script_chan = if same_script {
@@ -1077,16 +1094,17 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
                 old_pipeline.freeze();
             }
 
-            (load_data, script_chan, window_size)
+            (load_data, script_chan, window_size, is_private)
-
         };
 
+
         // Create the new pipeline, attached to the parent and push to pending frames
         self.new_pipeline(load_info.new_pipeline_id,
                           Some((load_info.containing_pipeline_id, load_info.new_subpage_id, load_info.frame_type)),
                           window_size,
                           script_chan,
-                          load_data);
+                          load_data,
+                          is_private);
 
         self.subpage_map.insert((load_info.containing_pipeline_id, load_info.new_subpage_id),
                                 load_info.new_pipeline_id);
@@ -1217,7 +1235,7 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
                 // Create the new pipeline
                 let window_size = self.pipelines.get(&source_id).and_then(|source| source.size);
                 let new_pipeline_id = PipelineId::new();
-                self.new_pipeline(new_pipeline_id, None, window_size, None, load_data);
+                self.new_pipeline(new_pipeline_id, None, window_size, None, load_data, false);
                 self.push_pending_frame(new_pipeline_id, Some(source_id));
 
                 // Send message to ScriptThread that will suspend all timers
@@ -1906,25 +1924,6 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
         ReadyToSave::Ready
     }
 
-    /// Checks whether the pipeline or its ancestors are private
-    #[allow(dead_code)]
-    fn check_is_pipeline_private(&self, mut pipeline_id: PipelineId) -> bool {
-        loop {
-            match self.pipelines.get(&pipeline_id) {
-                Some(pipeline) if pipeline.is_private => return true,
-                Some(pipeline) => match pipeline.parent_info {
-                    None => return false,
-                    Some((_, _, FrameType::MozBrowserIFrame)) => return false,
-                    Some((parent_id, _, _)) => pipeline_id = parent_id,
-                },
-                None => {
-                    warn!("Finding private ancestor for pipeline {} after closure.", pipeline_id);
-                    return false;
-                },
-            }
-        }
-    }
-
     // Close a frame (and all children)
     fn close_frame(&mut self, frame_id: FrameId, exit_mode: ExitPipelineMode) {
         // Store information about the pipelines to be closed. Then close the

components/constellation/pipeline.rs

@@ -64,6 +64,7 @@ pub struct Pipeline {
     /// animations cause composites to be continually scheduled.
     pub running_animations: bool,
     pub children: Vec<FrameId>,
+    /// Whether this pipeline is considered distinct from public pipelines.
     pub is_private: bool,
     /// Whether this pipeline should be treated as visible for the purposes of scheduling and
     /// resource management.
@@ -119,6 +120,8 @@ pub struct InitialPipelineState {
     pub parent_visibility: Option<bool>,
     /// Optional webrender api (if enabled).
     pub webrender_api_sender: Option<webrender_traits::RenderApiSender>,
+    /// Whether this pipeline is considered private.
+    pub is_private: bool,
 }
 
 impl Pipeline {
@@ -254,6 +257,7 @@ impl Pipeline {
                                      pipeline_chan,
                                      state.compositor_proxy,
                                      chrome_to_paint_chan,
+                                     state.is_private,
                                      state.load_data.url,
                                      state.window_size,
                                      state.parent_visibility.unwrap_or(true));
@@ -269,6 +273,7 @@ impl Pipeline {
            layout_chan: IpcSender<LayoutControlMsg>,
            compositor_proxy: Box<CompositorProxy + 'static + Send>,
            chrome_to_paint_chan: Sender<ChromeToPaintMsg>,
+           is_private: bool,
            url: Url,
            size: Option<TypedSize2D<PagePx, f32>>,
            visible: bool)
@@ -285,8 +290,8 @@ impl Pipeline {
             children: vec!(),
             size: size,
             running_animations: false,
-            is_private: false,
             visible: visible,
+            is_private: is_private,
         }
     }
 

components/net/resource_thread.rs

@@ -19,11 +19,13 @@ use http_loader::{self, HttpState};
 use hyper::client::pool::Pool;
 use hyper::header::{ContentType, Header, SetCookie};
 use hyper::mime::{Mime, SubLevel, TopLevel};
-use ipc_channel::ipc::{self, IpcReceiver, IpcSender};
+use ipc_channel::ipc::{self, IpcReceiver, IpcSender, IpcReceiverSet};
 use mime_classifier::{ApacheBugFlag, MIMEClassifier, NoSniffFlag};
 use net_traits::LoadContext;
 use net_traits::ProgressMsg::Done;
+use net_traits::filemanager_thread::FileManagerThreadMsg;
 use net_traits::request::{Request, RequestInit};
+use net_traits::storage_thread::StorageThreadMsg;
 use net_traits::{AsyncResponseTarget, Metadata, ProgressMsg, ResponseAction, CoreResourceThread};
 use net_traits::{CoreResourceMsg, CookieSource, FetchResponseMsg, FetchTaskTarget, LoadConsumer};
 use net_traits::{LoadData, LoadResponse, NetworkError, ResourceId};
@@ -56,6 +58,14 @@ pub enum ProgressSender {
     Listener(AsyncResponseTarget),
 }
 
+#[derive(Clone)]
+pub struct ResourceGroup {
+    cookie_jar: Arc<RwLock<CookieStorage>>,
+    auth_cache: Arc<RwLock<AuthCache>>,
+    hsts_list: Arc<RwLock<HstsList>>,
+    connector: Arc<Pool<Connector>>,
+}
+
 impl ProgressSender {
     //XXXjdm return actual error
     pub fn send(&self, msg: ProgressMsg) -> Result<(), ()> {
@@ -158,56 +168,117 @@ fn start_sending_opt(start_chan: LoadConsumer, metadata: Metadata,
     }
 }
 
+/// Returns a tuple of (public, private) senders to the new threads.
 pub fn new_resource_threads(user_agent: String,
                             devtools_chan: Option<Sender<DevtoolsControlMsg>>,
-                            profiler_chan: ProfilerChan) -> ResourceThreads {
+                            profiler_chan: ProfilerChan) -> (ResourceThreads, ResourceThreads) {
-    ResourceThreads::new(new_core_resource_thread(user_agent, devtools_chan, profiler_chan),
+    let (public_core, private_core) = new_core_resource_thread(user_agent, devtools_chan, profiler_chan);
-                         StorageThreadFactory::new(),
+    let storage: IpcSender<StorageThreadMsg> = StorageThreadFactory::new();
-                         FileManagerThreadFactory::new(TFD_PROVIDER))
+    let filemanager: IpcSender<FileManagerThreadMsg> = FileManagerThreadFactory::new(TFD_PROVIDER);
+    (ResourceThreads::new(public_core, storage.clone(), filemanager.clone()),
+     ResourceThreads::new(private_core, storage, filemanager))
 }
 
 
 /// Create a CoreResourceThread
 pub fn new_core_resource_thread(user_agent: String,
                                 devtools_chan: Option<Sender<DevtoolsControlMsg>>,
-                                profiler_chan: ProfilerChan) -> CoreResourceThread {
+                                profiler_chan: ProfilerChan)
-    let hsts_preload = HstsList::from_servo_preload();
+                                -> (CoreResourceThread, CoreResourceThread) {
-    let (setup_chan, setup_port) = ipc::channel().unwrap();
+    let (public_setup_chan, public_setup_port) = ipc::channel().unwrap();
-    let setup_chan_clone = setup_chan.clone();
+    let (private_setup_chan, private_setup_port) = ipc::channel().unwrap();
+    let public_setup_chan_clone = public_setup_chan.clone();
+    let private_setup_chan_clone = private_setup_chan.clone();
     spawn_named("ResourceManager".to_owned(), move || {
         let resource_manager = CoreResourceManager::new(
-            user_agent, hsts_preload, devtools_chan, profiler_chan
+            user_agent, devtools_chan, profiler_chan
         );
 
         let mut channel_manager = ResourceChannelManager {
-            from_client: setup_port,
+            resource_manager: resource_manager,
-            resource_manager: resource_manager
         };
-        channel_manager.start(setup_chan_clone);
+        channel_manager.start(public_setup_chan_clone,
+                              private_setup_chan_clone,
+                              public_setup_port,
+                              private_setup_port);
     });
-    setup_chan
+    (public_setup_chan, private_setup_chan)
 }
 
 struct ResourceChannelManager {
-    from_client: IpcReceiver<CoreResourceMsg>,
+    resource_manager: CoreResourceManager,
-    resource_manager: CoreResourceManager
+}
+
+fn create_resource_groups() -> (ResourceGroup, ResourceGroup) {
+    let mut hsts_list = HstsList::from_servo_preload();
+    let mut auth_cache = AuthCache::new();
+    let mut cookie_jar = CookieStorage::new();
+    if let Some(ref config_dir) = opts::get().config_dir {
+        read_json_from_file(&mut auth_cache, config_dir, "auth_cache.json");
+        read_json_from_file(&mut hsts_list, config_dir, "hsts_list.json");
+        read_json_from_file(&mut cookie_jar, config_dir, "cookie_jar.json");
+    }
+    let resource_group = ResourceGroup {
+        cookie_jar: Arc::new(RwLock::new(cookie_jar)),
+        auth_cache: Arc::new(RwLock::new(auth_cache)),
+        hsts_list: Arc::new(RwLock::new(hsts_list.clone())),
+        connector: create_http_connector(),
+    };
+    let private_resource_group = ResourceGroup {
+        cookie_jar: Arc::new(RwLock::new(CookieStorage::new())),
+        auth_cache: Arc::new(RwLock::new(AuthCache::new())),
+        hsts_list: Arc::new(RwLock::new(HstsList::new())),
+        connector: create_http_connector(),
+    };
+    (resource_group, private_resource_group)
 }
 
 impl ResourceChannelManager {
-    fn start(&mut self, control_sender: CoreResourceThread) {
+    #[allow(unsafe_code)]
+    fn start(&mut self,
+             public_control_sender: CoreResourceThread,
+             private_control_sender: CoreResourceThread,
+             public_receiver: IpcReceiver<CoreResourceMsg>,
+             private_receiver: IpcReceiver<CoreResourceMsg>) {
+        let (public_resource_group, private_resource_group) = create_resource_groups();
+
+        let mut rx_set = IpcReceiverSet::new().unwrap();
+        let private_id = rx_set.add(private_receiver).unwrap();
+        let public_id = rx_set.add(public_receiver).unwrap();
+
         loop {
-            match self.from_client.recv().unwrap() {
+            for (id, data) in rx_set.select().unwrap().into_iter().map(|m| m.unwrap()) {
+                let (group, sender) = if id == private_id {
+                    (&private_resource_group, &private_control_sender)
+                } else {
+                    assert_eq!(id, public_id);
+                    (&public_resource_group, &public_control_sender)
+                };
+                if let Ok(msg) = data.to() {
+                    if !self.process_msg(msg, group, &sender) {
+                        break;
+                    }
+                }
+            }
+        }
+    }
+
+    /// Returns false if the thread should exit.
+    fn process_msg(&mut self,
+                   msg: CoreResourceMsg,
+                   group: &ResourceGroup,
+                   control_sender: &CoreResourceThread) -> bool {
+        match msg {
             CoreResourceMsg::Load(load_data, consumer, id_sender) =>
-                    self.resource_manager.load(load_data, consumer, id_sender, control_sender.clone()),
+                self.resource_manager.load(load_data, consumer, id_sender, control_sender.clone(), group),
             CoreResourceMsg::Fetch(init, sender) =>
-                    self.resource_manager.fetch(init, sender),
+                self.resource_manager.fetch(init, sender, group),
             CoreResourceMsg::WebsocketConnect(connect, connect_data) =>
-                    self.resource_manager.websocket_connect(connect, connect_data),
+                self.resource_manager.websocket_connect(connect, connect_data, group),
             CoreResourceMsg::SetCookiesForUrl(request, cookie_list, source) =>
-                    self.resource_manager.set_cookies_for_url(request, cookie_list, source),
+                self.resource_manager.set_cookies_for_url(request, cookie_list, source, group),
             CoreResourceMsg::GetCookiesForUrl(url, consumer, source) => {
-                    let cookie_jar = &self.resource_manager.cookie_jar;
+                let mut cookie_jar = group.cookie_jar.write().unwrap();
-                    let mut cookie_jar = cookie_jar.write().unwrap();
                 consumer.send(cookie_jar.cookies_for_url(&url, source)).unwrap();
             }
             CoreResourceMsg::Cancel(res_id) => {
@@ -221,25 +292,24 @@ impl ResourceChannelManager {
             }
             CoreResourceMsg::Exit(sender) => {
                 if let Some(ref config_dir) = opts::get().config_dir {
-                        match self.resource_manager.auth_cache.read() {
+                    match group.auth_cache.read() {
                         Ok(auth_cache) => write_json_to_file(&*auth_cache, config_dir, "auth_cache.json"),
                         Err(_) => warn!("Error writing auth cache to disk"),
                     }
-                        match self.resource_manager.cookie_jar.read() {
+                    match group.cookie_jar.read() {
                         Ok(jar) => write_json_to_file(&*jar, config_dir, "cookie_jar.json"),
                         Err(_) => warn!("Error writing cookie jar to disk"),
                     }
-                        match self.resource_manager.hsts_list.read() {
+                    match group.hsts_list.read() {
                         Ok(hsts) => write_json_to_file(&*hsts, config_dir, "hsts_list.json"),
                         Err(_) => warn!("Error writing hsts list to disk"),
                     }
                 }
                 let _ = sender.send(());
-                    break;
+                return false;
-                }
-
             }
         }
+        true
     }
 }
 
@@ -381,50 +451,37 @@ pub struct AuthCache {
 
 pub struct CoreResourceManager {
     user_agent: String,
-    cookie_jar: Arc<RwLock<CookieStorage>>,
-    auth_cache: Arc<RwLock<AuthCache>>,
     mime_classifier: Arc<MIMEClassifier>,
     devtools_chan: Option<Sender<DevtoolsControlMsg>>,
     profiler_chan: ProfilerChan,
-    hsts_list: Arc<RwLock<HstsList>>,
-    connector: Arc<Pool<Connector>>,
     cancel_load_map: HashMap<ResourceId, Sender<()>>,
     next_resource_id: ResourceId,
 }
 
 impl CoreResourceManager {
     pub fn new(user_agent: String,
-               mut hsts_list: HstsList,
                devtools_channel: Option<Sender<DevtoolsControlMsg>>,
                profiler_chan: ProfilerChan) -> CoreResourceManager {
-        let mut auth_cache = AuthCache::new();
-        let mut cookie_jar = CookieStorage::new();
-        if let Some(ref config_dir) = opts::get().config_dir {
-            read_json_from_file(&mut auth_cache, config_dir, "auth_cache.json");
-            read_json_from_file(&mut hsts_list, config_dir, "hsts_list.json");
-            read_json_from_file(&mut cookie_jar, config_dir, "cookie_jar.json");
-        }
         CoreResourceManager {
             user_agent: user_agent,
-            cookie_jar: Arc::new(RwLock::new(cookie_jar)),
-            auth_cache: Arc::new(RwLock::new(auth_cache)),
             mime_classifier: Arc::new(MIMEClassifier::new()),
             devtools_chan: devtools_channel,
             profiler_chan: profiler_chan,
-            hsts_list: Arc::new(RwLock::new(hsts_list)),
-            connector: create_http_connector(),
             cancel_load_map: HashMap::new(),
             next_resource_id: ResourceId(0),
         }
     }
 
-    fn set_cookies_for_url(&mut self, request: Url, cookie_list: String, source: CookieSource) {
+    fn set_cookies_for_url(&mut self,
+                           request: Url,
+                           cookie_list: String,
+                           source: CookieSource,
+                           resource_group: &ResourceGroup) {
         let header = Header::parse_header(&[cookie_list.into_bytes()]);
         if let Ok(SetCookie(cookies)) = header {
             for bare_cookie in cookies {
                 if let Some(cookie) = cookie::Cookie::new_wrapped(bare_cookie, &request, source) {
-                    let cookie_jar = &self.cookie_jar;
+                    let mut cookie_jar = resource_group.cookie_jar.write().unwrap();
-                    let mut cookie_jar = cookie_jar.write().unwrap();
                     cookie_jar.push(cookie, source);
                 }
             }
@@ -435,7 +492,8 @@ impl CoreResourceManager {
             load_data: LoadData,
             consumer: LoadConsumer,
             id_sender: Option<IpcSender<ResourceId>>,
-            resource_thread: CoreResourceThread) {
+            resource_thread: CoreResourceThread,
+            resource_grp: &ResourceGroup) {
         fn from_factory(factory: fn(LoadData, LoadConsumer, Arc<MIMEClassifier>, CancellationListener))
                         -> Box<FnBox(LoadData,
                                      LoadConsumer,
@@ -461,16 +519,16 @@ impl CoreResourceManager {
             "file" => from_factory(file_loader::factory),
             "http" | "https" | "view-source" => {
                 let http_state = HttpState {
-                    hsts_list: self.hsts_list.clone(),
-                    cookie_jar: self.cookie_jar.clone(),
-                    auth_cache: self.auth_cache.clone(),
                     blocked_content: BLOCKED_CONTENT_RULES.clone(),
+                    hsts_list: resource_grp.hsts_list.clone(),
+                    cookie_jar: resource_grp.cookie_jar.clone(),
+                    auth_cache: resource_grp.auth_cache.clone()
                 };
                 http_loader::factory(self.user_agent.clone(),
                                      http_state,
                                      self.devtools_chan.clone(),
                                      self.profiler_chan.clone(),
-                                     self.connector.clone())
+                                     resource_grp.connector.clone())
             },
             "data" => from_factory(data_loader::factory),
             "about" => from_factory(about_loader::factory),
@@ -488,11 +546,14 @@ impl CoreResourceManager {
                          cancel_listener));
     }
 
-    fn fetch(&self, init: RequestInit, sender: IpcSender<FetchResponseMsg>) {
+    fn fetch(&self,
+             init: RequestInit,
+             sender: IpcSender<FetchResponseMsg>,
+             group: &ResourceGroup) {
         let http_state = HttpState {
-            hsts_list: self.hsts_list.clone(),
+            hsts_list: group.hsts_list.clone(),
-            cookie_jar: self.cookie_jar.clone(),
+            cookie_jar: group.cookie_jar.clone(),
-            auth_cache: self.auth_cache.clone(),
+            auth_cache: group.auth_cache.clone(),
             blocked_content: BLOCKED_CONTENT_RULES.clone(),
         };
         let ua = self.user_agent.clone();
@@ -510,7 +571,8 @@ impl CoreResourceManager {
 
     fn websocket_connect(&self,
                          connect: WebSocketCommunicate,
-                         connect_data: WebSocketConnectData) {
+                         connect_data: WebSocketConnectData,
-        websocket_loader::init(connect, connect_data, self.cookie_jar.clone());
+                         resource_grp: &ResourceGroup) {
+        websocket_loader::init(connect, connect_data, resource_grp.cookie_jar.clone());
     }
 }

components/net_traits/lib.rs

@@ -39,7 +39,6 @@ use msg::constellation_msg::{PipelineId, ReferrerPolicy};
 use request::{Request, RequestInit};
 use response::{HttpsState, Response};
 use std::io::Error as IOError;
-use std::sync::mpsc::Sender;
 use std::thread;
 use storage_thread::StorageThreadMsg;
 use url::Url;
@@ -649,9 +648,10 @@ pub fn unwrap_websocket_protocol(wsp: Option<&header::WebSocketProtocol>) -> Opt
 #[derive(Clone, PartialEq, Eq, Copy, Hash, Debug, Deserialize, Serialize, HeapSizeOf)]
 pub struct ResourceId(pub u32);
 
+#[derive(Deserialize, Serialize)]
 pub enum ConstellationMsg {
     /// Queries whether a pipeline or its ancestors are private
-    IsPrivate(PipelineId, Sender<bool>),
+    IsPrivate(PipelineId, IpcSender<bool>),
 }
 
 /// Network errors that have to be exported out of the loaders

components/script/dom/htmliframeelement.rs

@@ -562,6 +562,21 @@ impl HTMLIFrameElementMethods for HTMLIFrameElement {
     make_getter!(Height, "height");
     // https://html.spec.whatwg.org/multipage/#dom-dim-height
     make_dimension_setter!(SetHeight, "height");
+
+    // check-tidy: no specs after this line
+    fn SetMozprivatebrowsing(&self, value: bool) {
+        let element = self.upcast::<Element>();
+        element.set_bool_attribute(&Atom::from("mozprivatebrowsing"), value);
+    }
+
+    fn Mozprivatebrowsing(&self) -> bool {
+        if window_from_node(self).is_mozbrowser() {
+            let element = self.upcast::<Element>();
+            element.has_attribute(&Atom::from("mozprivatebrowsing"))
+        } else {
+            false
+        }
+    }
 }
 
 impl VirtualMethods for HTMLIFrameElement {

components/script/dom/webidls/HTMLIFrameElement.webidl

@@ -33,6 +33,9 @@ partial interface HTMLIFrameElement {
 partial interface HTMLIFrameElement {
     [Func="::dom::window::Window::global_is_mozbrowser"]
     attribute boolean mozbrowser;
+
+    [Func="::dom::window::Window::global_is_mozbrowser"]
+    attribute boolean mozprivatebrowsing;
 };
 
 HTMLIFrameElement implements BrowserElement;

components/servo/lib.rs

@@ -208,12 +208,13 @@ fn create_constellation(opts: opts::Opts,
                         webrender_api_sender: Option<webrender_traits::RenderApiSender>) -> Sender<ConstellationMsg> {
     let bluetooth_thread: IpcSender<BluetoothMethodMsg> = BluetoothThreadFactory::new();
 
-    let resource_threads = new_resource_threads(opts.user_agent.clone(),
+    let (public_resource_threads, private_resource_threads) =
+        new_resource_threads(opts.user_agent.clone(),
                              devtools_chan.clone(),
                              time_profiler_chan.clone());
-    let image_cache_thread = new_image_cache_thread(resource_threads.sender(),
+    let image_cache_thread = new_image_cache_thread(public_resource_threads.sender(),
                                                     webrender_api_sender.as_ref().map(|wr| wr.create_api()));
-    let font_cache_thread = FontCacheThread::new(resource_threads.sender(),
+    let font_cache_thread = FontCacheThread::new(public_resource_threads.sender(),
                                                  webrender_api_sender.as_ref().map(|wr| wr.create_api()));
 
     let initial_state = InitialConstellationState {
@@ -222,7 +223,8 @@ fn create_constellation(opts: opts::Opts,
         bluetooth_thread: bluetooth_thread,
         image_cache_thread: image_cache_thread,
         font_cache_thread: font_cache_thread,
-        resource_threads: resource_threads,
+        public_resource_threads: public_resource_threads,
+        private_resource_threads: private_resource_threads,
         time_profiler_chan: time_profiler_chan,
         mem_profiler_chan: mem_profiler_chan,
         supports_clipboard: supports_clipboard,

tests/unit/net/resource_thread.rs

@@ -40,7 +40,7 @@ impl LoadOrigin for ResourceTest {
 fn test_exit() {
     let (tx, _rx) = ipc::channel().unwrap();
     let (sender, receiver) = ipc::channel().unwrap();
-    let resource_thread = new_core_resource_thread("".to_owned(), None, ProfilerChan(tx));
+    let (resource_thread, _) = new_core_resource_thread("".to_owned(), None, ProfilerChan(tx));
     resource_thread.send(CoreResourceMsg::Exit(sender)).unwrap();
     receiver.recv().unwrap();
 }
@@ -49,7 +49,7 @@ fn test_exit() {
 fn test_bad_scheme() {
     let (tx, _rx) = ipc::channel().unwrap();
     let (sender, receiver) = ipc::channel().unwrap();
-    let resource_thread = new_core_resource_thread("".to_owned(), None, ProfilerChan(tx));
+    let (resource_thread, _) = new_core_resource_thread("".to_owned(), None, ProfilerChan(tx));
     let (start_chan, start) = ipc::channel().unwrap();
     let url = Url::parse("bogus://whatever").unwrap();
     resource_thread.send(CoreResourceMsg::Load(LoadData::new(LoadContext::Browsing, url, &ResourceTest),
@@ -228,7 +228,7 @@ fn test_cancelled_listener() {
 
     let (tx, _rx) = ipc::channel().unwrap();
     let (exit_sender, exit_receiver) = ipc::channel().unwrap();
-    let resource_thread = new_core_resource_thread("".to_owned(), None, ProfilerChan(tx));
+    let (resource_thread, _) = new_core_resource_thread("".to_owned(), None, ProfilerChan(tx));
     let (sender, receiver) = ipc::channel().unwrap();
     let (id_sender, id_receiver) = ipc::channel().unwrap();
     let (sync_sender, sync_receiver) = ipc::channel().unwrap();

tests/wpt/mozilla/meta/MANIFEST.json

@@ -6616,6 +6616,12 @@
             "url": "/_mozilla/mozilla/mozbrowser/mozbrowsertitlechangedeagerly_event.html"
           }
         ],
+        "mozilla/mozbrowser/private_browsing.html": [
+          {
+            "path": "mozilla/mozbrowser/private_browsing.html",
+            "url": "/_mozilla/mozilla/mozbrowser/private_browsing.html"
+          }
+        ],
         "mozilla/mozbrowser/redirect.html": [
           {
             "path": "mozilla/mozbrowser/redirect.html",

tests/wpt/mozilla/tests/mozilla/mozbrowser/iframe_contentDocument_inner.html

@@ -0,0 +1,3 @@
+<html><body><div id="test">Normal iFrame</div></body>
+<script>alert(document.cookie)</script>
+</html>

tests/wpt/mozilla/tests/mozilla/mozbrowser/iframe_privateContent_grandchild.html

@@ -0,0 +1,4 @@
+<span id="cookie"></span>
+<script>
+document.querySelector('#cookie').innerHTML = document.cookie;
+</script>

tests/wpt/mozilla/tests/mozilla/mozbrowser/iframe_privateContent_inner.html

@@ -0,0 +1,13 @@
+<html>
+<body>
+<div id="test">Private iFrame</div>
+</body>
+<script>document.cookie = "private=active;path=/";</script>
+<iframe src="iframe_privateContent_grandchild.html"></iframe>
+<script>
+var iframe = document.querySelector('iframe');
+iframe.onload = function() {
+  alert(document.cookie + ' ' + iframe.contentDocument.querySelector('#cookie').textContent);
+};
+</script>
+</html>

tests/wpt/mozilla/tests/mozilla/mozbrowser/private_browsing.html

@@ -0,0 +1,44 @@
+<head>
+  <meta charset="utf8" />
+  <title>Private browsing</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+</head>
+<body>
+  <script>
+    async_test(function(t) {
+      var privateFrame = document.createElement("iframe");
+      privateFrame.mozbrowser = true;
+      privateFrame.mozprivatebrowsing = true;
+
+      var gotGrandchildResult = false;
+      privateFrame.addEventListener("mozbrowsershowmodalprompt", t.step_func(e => {
+        assert_equals(e.detail.message, 'private=active private=active');
+        gotGrandchildResult = true;
+      }));
+
+      privateFrame.onload = t.step_func(function() {
+        assert_true(gotGrandchildResult);
+
+        var parent = privateFrame.parentNode;
+        parent.removeChild(privateFrame);
+
+        var iframe = document.createElement("iframe");
+        var promptDisplay = false;
+        iframe.mozbrowser = true;
+        iframe.onload = t.step_func(function() {
+          assert_true(promptDisplay);
+          t.done();
+        });
+        iframe.addEventListener("mozbrowsershowmodalprompt", t.step_func(e => {
+          promptDisplay = true;
+          assert_equals(e.detail.message, "");
+        }));
+        iframe.src = "iframe_contentDocument_inner.html";
+        parent.appendChild(iframe);
+      });
+      privateFrame.src = "iframe_privateContent_inner.html";
+      document.body.appendChild(privateFrame);
+    });
+  </script>
+</body>