content/browser/frame_host/render_frame_proxy_host.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/frame_host/render_frame_proxy_host.h"
   6
   7 #include "base/lazy_instance.h"
   8 #include "content/browser/bad_message.h"
   9 #include "content/browser/frame_host/cross_process_frame_connector.h"
  10 #include "content/browser/frame_host/frame_tree.h"
  11 #include "content/browser/frame_host/frame_tree_node.h"
  12 #include "content/browser/frame_host/render_frame_host_delegate.h"
  13 #include "content/browser/frame_host/render_frame_host_impl.h"
  14 #include "content/browser/frame_host/render_widget_host_view_child_frame.h"
  15 #include "content/browser/message_port_message_filter.h"
  16 #include "content/browser/renderer_host/render_view_host_impl.h"
  17 #include "content/browser/renderer_host/render_widget_host_view_base.h"
  18 #include "content/browser/site_instance_impl.h"
  19 #include "content/common/frame_messages.h"
  20 #include "content/public/browser/browser_thread.h"
  21 #include "ipc/ipc_message.h"
  22
  23 namespace content {
  24
  25 namespace {
  26
  27 // The (process id, routing id) pair that identifies one RenderFrameProxy.
  28 typedef std::pair<int32, int32> RenderFrameProxyHostID;
  29 typedef base::hash_map<RenderFrameProxyHostID, RenderFrameProxyHost*>
  30     RoutingIDFrameProxyMap;
  31 base::LazyInstance<RoutingIDFrameProxyMap> g_routing_id_frame_proxy_map =
  32   LAZY_INSTANCE_INITIALIZER;
  33
  34 }
  35
  36 // static
  37 RenderFrameProxyHost* RenderFrameProxyHost::FromID(int process_id,
  38                                                    int routing_id) {
  39   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  40   RoutingIDFrameProxyMap* frames = g_routing_id_frame_proxy_map.Pointer();
  41   RoutingIDFrameProxyMap::iterator it = frames->find(
  42       RenderFrameProxyHostID(process_id, routing_id));
  43   return it == frames->end() ? NULL : it->second;
  44 }
  45
  46 RenderFrameProxyHost::RenderFrameProxyHost(SiteInstance* site_instance,
  47                                            RenderViewHostImpl* render_view_host,
  48                                            FrameTreeNode* frame_tree_node)
  49     : routing_id_(site_instance->GetProcess()->GetNextRoutingID()),
  50       site_instance_(site_instance),
  51       process_(site_instance->GetProcess()),
  52       frame_tree_node_(frame_tree_node),
  53       render_frame_proxy_created_(false),
  54       render_view_host_(render_view_host) {
  55   GetProcess()->AddRoute(routing_id_, this);
  56   CHECK(g_routing_id_frame_proxy_map.Get().insert(
  57       std::make_pair(
  58           RenderFrameProxyHostID(GetProcess()->GetID(), routing_id_),
  59           this)).second);
  60   CHECK_IMPLIES(!render_view_host,
  61                 frame_tree_node_->render_manager()->ForInnerDelegate());
  62   if (render_view_host)
  63     frame_tree_node_->frame_tree()->AddRenderViewHostRef(render_view_host_);
  64
  65   bool is_proxy_to_parent = !frame_tree_node_->IsMainFrame() &&
  66                             frame_tree_node_->parent()
  67                                     ->render_manager()
  68                                     ->current_frame_host()
  69                                     ->GetSiteInstance() == site_instance;
  70
  71   // If this is a proxy to parent frame or this proxy is for the inner
  72   // WebContents's FrameTreeNode in outer WebContents's SiteInstance, then we
  73   // need a CrossProcessFrameConnector.
  74   if (is_proxy_to_parent ||
  75       frame_tree_node_->render_manager()->ForInnerDelegate()) {
  76     // The RenderFrameHost navigating cross-process is destroyed and a proxy for
  77     // it is created in the parent's process. CrossProcessFrameConnector
  78     // initialization only needs to happen on an initial cross-process
  79     // navigation, when the RenderFrameHost leaves the same process as its
  80     // parent. The same CrossProcessFrameConnector is used for subsequent cross-
  81     // process navigations, but it will be destroyed if the frame is
  82     // navigated back to the same SiteInstance as its parent.
  83     cross_process_frame_connector_.reset(new CrossProcessFrameConnector(this));
  84   }
  85 }
  86
  87 RenderFrameProxyHost::~RenderFrameProxyHost() {
  88   if (GetProcess()->HasConnection()) {
  89     // TODO(nasko): For now, don't send this IPC for top-level frames, as
  90     // the top-level RenderFrame will delete the RenderFrameProxy.
  91     // This can be removed once we don't have a swapped out state on
  92     // RenderFrame. See https://crbug.com/357747
  93     if (!frame_tree_node_->IsMainFrame())
  94       Send(new FrameMsg_DeleteProxy(routing_id_));
  95   }
  96
  97   if (render_view_host_)
  98     frame_tree_node_->frame_tree()->ReleaseRenderViewHostRef(render_view_host_);
  99   GetProcess()->RemoveRoute(routing_id_);
 100   g_routing_id_frame_proxy_map.Get().erase(
 101       RenderFrameProxyHostID(GetProcess()->GetID(), routing_id_));
 102 }
 103
 104 void RenderFrameProxyHost::SetChildRWHView(RenderWidgetHostView* view) {
 105   cross_process_frame_connector_->set_view(
 106       static_cast<RenderWidgetHostViewChildFrame*>(view));
 107 }
 108
 109 RenderViewHostImpl* RenderFrameProxyHost::GetRenderViewHost() {
 110   return frame_tree_node_->frame_tree()->GetRenderViewHost(
 111       site_instance_.get());
 112 }
 113
 114 RenderWidgetHostView* RenderFrameProxyHost::GetRenderWidgetHostView() {
 115   return frame_tree_node_->parent()->render_manager()
 116       ->GetRenderWidgetHostView();
 117 }
 118
 119 void RenderFrameProxyHost::TakeFrameHostOwnership(
 120     scoped_ptr<RenderFrameHostImpl> render_frame_host) {
 121   CHECK(render_frame_host_ == nullptr);
 122   render_frame_host_ = render_frame_host.Pass();
 123   render_frame_host_->set_render_frame_proxy_host(this);
 124 }
 125
 126 scoped_ptr<RenderFrameHostImpl> RenderFrameProxyHost::PassFrameHostOwnership() {
 127   render_frame_host_->set_render_frame_proxy_host(NULL);
 128   return render_frame_host_.Pass();
 129 }
 130
 131 bool RenderFrameProxyHost::Send(IPC::Message *msg) {
 132   return GetProcess()->Send(msg);
 133 }
 134
 135 bool RenderFrameProxyHost::OnMessageReceived(const IPC::Message& msg) {
 136   if (cross_process_frame_connector_.get() &&
 137       cross_process_frame_connector_->OnMessageReceived(msg))
 138     return true;
 139
 140   bool handled = true;
 141   IPC_BEGIN_MESSAGE_MAP(RenderFrameProxyHost, msg)
 142     IPC_MESSAGE_HANDLER(FrameHostMsg_Detach, OnDetach)
 143     IPC_MESSAGE_HANDLER(FrameHostMsg_OpenURL, OnOpenURL)
 144     IPC_MESSAGE_HANDLER(FrameHostMsg_RouteMessageEvent, OnRouteMessageEvent)
 145     IPC_MESSAGE_UNHANDLED(handled = false)
 146   IPC_END_MESSAGE_MAP()
 147   return handled;
 148 }
 149
 150 bool RenderFrameProxyHost::InitRenderFrameProxy() {
 151   DCHECK(!render_frame_proxy_created_);
 152
 153   // It is possible to reach this when the process is dead (in particular, when
 154   // creating proxies from CreateProxiesForChildFrame).  In that case, don't
 155   // create the proxy.  The process shouldn't be resurrected just to create
 156   // RenderFrameProxies; it should be restored only if it needs to host a
 157   // RenderFrame.  When that happens, the process will be reinitialized, and
 158   // all necessary proxies, including any of the ones we skipped here, will be
 159   // created by CreateProxiesForSiteInstance. See https://crbug.com/476846
 160   if (!GetProcess()->HasConnection())
 161     return false;
 162
 163   int parent_routing_id = MSG_ROUTING_NONE;
 164   if (frame_tree_node_->parent()) {
 165     // It is safe to use GetRenderFrameProxyHost to get the parent proxy, since
 166     // new child frames always start out as local frames, so a new proxy should
 167     // never have a RenderFrameHost as a parent.
 168     RenderFrameProxyHost* parent_proxy =
 169         frame_tree_node_->parent()->render_manager()->GetRenderFrameProxyHost(
 170             site_instance_.get());
 171     CHECK(parent_proxy);
 172
 173     // Proxies that aren't live in the parent node should not be initialized
 174     // here, since there is no valid parent RenderFrameProxy on the renderer
 175     // side.  This can happen when adding a new child frame after an opener
 176     // process crashed and was reloaded.  See https://crbug.com/501152.
 177     if (!parent_proxy->is_render_frame_proxy_live())
 178       return false;
 179
 180     parent_routing_id = parent_proxy->GetRoutingID();
 181     CHECK_NE(parent_routing_id, MSG_ROUTING_NONE);
 182   }
 183
 184   Send(new FrameMsg_NewFrameProxy(routing_id_,
 185                                   parent_routing_id,
 186                                   frame_tree_node_->frame_tree()
 187                                       ->GetRenderViewHost(site_instance_.get())
 188                                       ->GetRoutingID(),
 189                                   frame_tree_node_
 190                                       ->current_replication_state()));
 191
 192   render_frame_proxy_created_ = true;
 193   return true;
 194 }
 195
 196 void RenderFrameProxyHost::DisownOpener() {
 197   Send(new FrameMsg_DisownOpener(GetRoutingID()));
 198 }
 199
 200 void RenderFrameProxyHost::OnDetach() {
 201   if (frame_tree_node_->render_manager()->ForInnerDelegate()) {
 202     frame_tree_node_->render_manager()->RemoveOuterDelegateFrame();
 203     return;
 204   }
 205
 206   // This message should only be received for subframes.  Note that we can't
 207   // restrict it to just the current SiteInstances of the ancestors of this
 208   // frame, because another frame in the tree may be able to detach this frame
 209   // by navigating its parent.
 210   if (frame_tree_node_->IsMainFrame()) {
 211     bad_message::ReceivedBadMessage(GetProcess(), bad_message::RFPH_DETACH);
 212     return;
 213   }
 214   frame_tree_node_->frame_tree()->RemoveFrame(frame_tree_node_);
 215 }
 216
 217 void RenderFrameProxyHost::OnOpenURL(
 218     const FrameHostMsg_OpenURL_Params& params) {
 219   // TODO(creis): Verify that we are in the same BrowsingInstance as the current
 220   // RenderFrameHost.  See NavigatorImpl::RequestOpenURL.
 221   frame_tree_node_->current_frame_host()->OpenURL(params, site_instance_.get());
 222 }
 223
 224 void RenderFrameProxyHost::OnRouteMessageEvent(
 225     const FrameMsg_PostMessage_Params& params) {
 226   RenderFrameHostImpl* target_rfh = frame_tree_node()->current_frame_host();
 227
 228   // Only deliver the message if the request came from a RenderFrameHost in the
 229   // same BrowsingInstance or if this WebContents is dedicated to a browser
 230   // plugin guest.
 231   //
 232   // TODO(alexmos, lazyboy):  The check for browser plugin guest currently
 233   // requires going through the delegate.  It should be refactored and
 234   // performed here once OOPIF support in <webview> is further along.
 235   SiteInstance* target_site_instance = target_rfh->GetSiteInstance();
 236   if (!target_site_instance->IsRelatedSiteInstance(GetSiteInstance()) &&
 237       !target_rfh->delegate()->ShouldRouteMessageEvent(target_rfh,
 238                                                        GetSiteInstance()))
 239     return;
 240
 241   FrameMsg_PostMessage_Params new_params(params);
 242
 243   // If there is a source_routing_id, translate it to the routing ID of the
 244   // equivalent RenderFrameProxyHost in the target process.
 245   if (new_params.source_routing_id != MSG_ROUTING_NONE) {
 246     RenderFrameHostImpl* source_rfh = RenderFrameHostImpl::FromID(
 247         GetProcess()->GetID(), new_params.source_routing_id);
 248     if (!source_rfh) {
 249       new_params.source_routing_id = MSG_ROUTING_NONE;
 250     } else {
 251       // Ensure that we have a swapped-out RVH and proxy for the source frame
 252       // in the target SiteInstance. If it doesn't exist, create it on demand
 253       // and also create its opener chain, since that will also be accessible
 254       // to the target page.
 255       target_rfh->delegate()->EnsureOpenerProxiesExist(source_rfh);
 256
 257       // If the message source is a cross-process subframe, its proxy will only
 258       // be created in --site-per-process mode.  If the proxy wasn't created,
 259       // set the source routing ID to MSG_ROUTING_NONE (see
 260       // https://crbug.com/485520 for discussion on why this is ok).
 261       RenderFrameProxyHost* source_proxy_in_target_site_instance =
 262           source_rfh->frame_tree_node()
 263               ->render_manager()
 264               ->GetRenderFrameProxyHost(target_site_instance);
 265       if (source_proxy_in_target_site_instance) {
 266         new_params.source_routing_id =
 267             source_proxy_in_target_site_instance->GetRoutingID();
 268       } else {
 269         new_params.source_routing_id = MSG_ROUTING_NONE;
 270       }
 271     }
 272   }
 273
 274   if (!params.message_ports.empty()) {
 275     // Updating the message port information has to be done in the IO thread;
 276     // MessagePortMessageFilter::RouteMessageEventWithMessagePorts will send
 277     // FrameMsg_PostMessageEvent after it's done. Note that a trivial solution
 278     // would've been to post a task on the IO thread to do the IO-thread-bound
 279     // work, and make that post a task back to WebContentsImpl in the UI
 280     // thread. But we cannot do that, since there's nothing to guarantee that
 281     // WebContentsImpl stays alive during the round trip.
 282     scoped_refptr<MessagePortMessageFilter> message_port_message_filter(
 283         static_cast<RenderProcessHostImpl*>(target_rfh->GetProcess())
 284             ->message_port_message_filter());
 285     BrowserThread::PostTask(
 286         BrowserThread::IO, FROM_HERE,
 287         base::Bind(&MessagePortMessageFilter::RouteMessageEventWithMessagePorts,
 288                    message_port_message_filter, target_rfh->GetRoutingID(),
 289                    new_params));
 290   } else {
 291     target_rfh->Send(
 292         new FrameMsg_PostMessageEvent(target_rfh->GetRoutingID(), new_params));
 293   }
 294 }
 295
 296 }  // namespace content