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(render_view_host_);
  61   frame_tree_node_->frame_tree()->AddRenderViewHostRef(render_view_host_);
  62
  63   if (!frame_tree_node_->IsMainFrame() &&
  64       frame_tree_node_->parent()
  65               ->render_manager()
  66               ->current_frame_host()
  67               ->GetSiteInstance() == site_instance) {
  68     // The RenderFrameHost navigating cross-process is destroyed and a proxy for
  69     // it is created in the parent's process. CrossProcessFrameConnector
  70     // initialization only needs to happen on an initial cross-process
  71     // navigation, when the RenderFrameHost leaves the same process as its
  72     // parent. The same CrossProcessFrameConnector is used for subsequent cross-
  73     // process navigations, but it will be destroyed if the frame is
  74     // navigated back to the same SiteInstance as its parent.
  75     cross_process_frame_connector_.reset(new CrossProcessFrameConnector(this));
  76   }
  77 }
  78
  79 RenderFrameProxyHost::~RenderFrameProxyHost() {
  80   if (GetProcess()->HasConnection()) {
  81     // TODO(nasko): For now, don't send this IPC for top-level frames, as
  82     // the top-level RenderFrame will delete the RenderFrameProxy.
  83     // This can be removed once we don't have a swapped out state on
  84     // RenderFrame. See https://crbug.com/357747
  85     if (!frame_tree_node_->IsMainFrame())
  86       Send(new FrameMsg_DeleteProxy(routing_id_));
  87   }
  88
  89   frame_tree_node_->frame_tree()->ReleaseRenderViewHostRef(render_view_host_);
  90   GetProcess()->RemoveRoute(routing_id_);
  91   g_routing_id_frame_proxy_map.Get().erase(
  92       RenderFrameProxyHostID(GetProcess()->GetID(), routing_id_));
  93 }
  94
  95 void RenderFrameProxyHost::SetChildRWHView(RenderWidgetHostView* view) {
  96   cross_process_frame_connector_->set_view(
  97       static_cast<RenderWidgetHostViewChildFrame*>(view));
  98 }
  99
 100 RenderViewHostImpl* RenderFrameProxyHost::GetRenderViewHost() {
 101   return frame_tree_node_->frame_tree()->GetRenderViewHost(
 102       site_instance_.get());
 103 }
 104
 105 RenderWidgetHostView* RenderFrameProxyHost::GetRenderWidgetHostView() {
 106   return frame_tree_node_->parent()->render_manager()
 107       ->GetRenderWidgetHostView();
 108 }
 109
 110 void RenderFrameProxyHost::TakeFrameHostOwnership(
 111     scoped_ptr<RenderFrameHostImpl> render_frame_host) {
 112   CHECK(render_frame_host_ == nullptr);
 113   render_frame_host_ = render_frame_host.Pass();
 114   render_frame_host_->set_render_frame_proxy_host(this);
 115 }
 116
 117 scoped_ptr<RenderFrameHostImpl> RenderFrameProxyHost::PassFrameHostOwnership() {
 118   render_frame_host_->set_render_frame_proxy_host(NULL);
 119   return render_frame_host_.Pass();
 120 }
 121
 122 bool RenderFrameProxyHost::Send(IPC::Message *msg) {
 123   return GetProcess()->Send(msg);
 124 }
 125
 126 bool RenderFrameProxyHost::OnMessageReceived(const IPC::Message& msg) {
 127   if (cross_process_frame_connector_.get() &&
 128       cross_process_frame_connector_->OnMessageReceived(msg))
 129     return true;
 130
 131   bool handled = true;
 132   IPC_BEGIN_MESSAGE_MAP(RenderFrameProxyHost, msg)
 133     IPC_MESSAGE_HANDLER(FrameHostMsg_Detach, OnDetach)
 134     IPC_MESSAGE_HANDLER(FrameHostMsg_OpenURL, OnOpenURL)
 135     IPC_MESSAGE_HANDLER(FrameHostMsg_RouteMessageEvent, OnRouteMessageEvent)
 136     IPC_MESSAGE_UNHANDLED(handled = false)
 137   IPC_END_MESSAGE_MAP()
 138   return handled;
 139 }
 140
 141 bool RenderFrameProxyHost::InitRenderFrameProxy() {
 142   DCHECK(!render_frame_proxy_created_);
 143
 144   // It is possible to reach this when the process is dead (in particular, when
 145   // creating proxies from CreateProxiesForChildFrame).  In that case, don't
 146   // create the proxy.  The process shouldn't be resurrected just to create
 147   // RenderFrameProxies; it should be restored only if it needs to host a
 148   // RenderFrame.  When that happens, the process will be reinitialized, and
 149   // all necessary proxies, including any of the ones we skipped here, will be
 150   // created by CreateProxiesForSiteInstance. See https://crbug.com/476846
 151   if (!GetProcess()->HasConnection())
 152     return false;
 153
 154   int parent_routing_id = MSG_ROUTING_NONE;
 155   if (frame_tree_node_->parent()) {
 156     // It is safe to use GetRenderFrameProxyHost to get the parent proxy, since
 157     // new child frames always start out as local frames, so a new proxy should
 158     // never have a RenderFrameHost as a parent.
 159     RenderFrameProxyHost* parent_proxy =
 160         frame_tree_node_->parent()->render_manager()->GetRenderFrameProxyHost(
 161             site_instance_.get());
 162     CHECK(parent_proxy);
 163     // When this is called, the parent RenderFrameProxy should already exist.
 164     // The FrameNew_NewFrameProxy will crash on the renderer side if there's no
 165     // parent proxy.
 166     CHECK(parent_proxy->is_render_frame_proxy_live());
 167     parent_routing_id = parent_proxy->GetRoutingID();
 168     CHECK_NE(parent_routing_id, MSG_ROUTING_NONE);
 169   }
 170
 171   Send(new FrameMsg_NewFrameProxy(routing_id_,
 172                                   parent_routing_id,
 173                                   frame_tree_node_->frame_tree()
 174                                       ->GetRenderViewHost(site_instance_.get())
 175                                       ->GetRoutingID(),
 176                                   frame_tree_node_
 177                                       ->current_replication_state()));
 178
 179   render_frame_proxy_created_ = true;
 180   return true;
 181 }
 182
 183 void RenderFrameProxyHost::DisownOpener() {
 184   Send(new FrameMsg_DisownOpener(GetRoutingID()));
 185 }
 186
 187 void RenderFrameProxyHost::OnDetach() {
 188   // This message should only be received for subframes.  Note that we can't
 189   // restrict it to just the current SiteInstances of the ancestors of this
 190   // frame, because another frame in the tree may be able to detach this frame
 191   // by navigating its parent.
 192   if (frame_tree_node_->IsMainFrame()) {
 193     bad_message::ReceivedBadMessage(GetProcess(), bad_message::RFPH_DETACH);
 194     return;
 195   }
 196   frame_tree_node_->frame_tree()->RemoveFrame(frame_tree_node_);
 197 }
 198
 199 void RenderFrameProxyHost::OnOpenURL(
 200     const FrameHostMsg_OpenURL_Params& params) {
 201   // TODO(creis): Verify that we are in the same BrowsingInstance as the current
 202   // RenderFrameHost.  See NavigatorImpl::RequestOpenURL.
 203   frame_tree_node_->current_frame_host()->OpenURL(params, site_instance_.get());
 204 }
 205
 206 void RenderFrameProxyHost::OnRouteMessageEvent(
 207     const FrameMsg_PostMessage_Params& params) {
 208   RenderFrameHostImpl* target_rfh = frame_tree_node()->current_frame_host();
 209
 210   // Only deliver the message if the request came from a RenderFrameHost in the
 211   // same BrowsingInstance or if this WebContents is dedicated to a browser
 212   // plugin guest.
 213   //
 214   // TODO(alexmos, lazyboy):  The check for browser plugin guest currently
 215   // requires going through the delegate.  It should be refactored and
 216   // performed here once OOPIF support in <webview> is further along.
 217   SiteInstance* target_site_instance = target_rfh->GetSiteInstance();
 218   if (!target_site_instance->IsRelatedSiteInstance(GetSiteInstance()) &&
 219       !target_rfh->delegate()->ShouldRouteMessageEvent(target_rfh,
 220                                                        GetSiteInstance()))
 221     return;
 222
 223   FrameMsg_PostMessage_Params new_params(params);
 224
 225   // If there is a source_routing_id, translate it to the routing ID of the
 226   // equivalent RenderFrameProxyHost in the target process.
 227   if (new_params.source_routing_id != MSG_ROUTING_NONE) {
 228     RenderFrameHostImpl* source_rfh = RenderFrameHostImpl::FromID(
 229         GetProcess()->GetID(), new_params.source_routing_id);
 230     if (!source_rfh) {
 231       new_params.source_routing_id = MSG_ROUTING_NONE;
 232     } else {
 233       // Ensure that we have a swapped-out RVH and proxy for the source frame.
 234       // If it doesn't exist, create it on demand and also create its opener
 235       // chain, since those will also be accessible to the target page.
 236       //
 237       // TODO(alexmos): This currently only works for top-level frames and
 238       // won't create the right proxy if the message source is a subframe on a
 239       // cross-process tab.  This will be cleaned up as part of moving opener
 240       // tracking to FrameTreeNode (https://crbug.com/225940). For now, if the
 241       // message is sent from a subframe on a cross-process tab, set the source
 242       // routing ID to the main frame of the source tab, which matches legacy
 243       // postMessage behavior prior to --site-per-process.
 244       int source_view_routing_id =
 245           target_rfh->delegate()->EnsureOpenerRenderViewsExist(source_rfh);
 246
 247       RenderFrameProxyHost* source_proxy_in_target_site_instance =
 248           source_rfh->frame_tree_node()
 249               ->render_manager()
 250               ->GetRenderFrameProxyHost(target_rfh->GetSiteInstance());
 251       if (source_proxy_in_target_site_instance) {
 252         new_params.source_routing_id =
 253             source_proxy_in_target_site_instance->GetRoutingID();
 254       } else if (source_view_routing_id != MSG_ROUTING_NONE) {
 255         RenderViewHostImpl* source_rvh = RenderViewHostImpl::FromID(
 256             target_rfh->GetProcess()->GetID(), source_view_routing_id);
 257         CHECK(source_rvh);
 258         new_params.source_routing_id = source_rvh->main_frame_routing_id();
 259       } else {
 260         new_params.source_routing_id = MSG_ROUTING_NONE;
 261       }
 262     }
 263   }
 264
 265   if (!params.message_ports.empty()) {
 266     // Updating the message port information has to be done in the IO thread;
 267     // MessagePortMessageFilter::RouteMessageEventWithMessagePorts will send
 268     // FrameMsg_PostMessageEvent after it's done. Note that a trivial solution
 269     // would've been to post a task on the IO thread to do the IO-thread-bound
 270     // work, and make that post a task back to WebContentsImpl in the UI
 271     // thread. But we cannot do that, since there's nothing to guarantee that
 272     // WebContentsImpl stays alive during the round trip.
 273     scoped_refptr<MessagePortMessageFilter> message_port_message_filter(
 274         static_cast<RenderProcessHostImpl*>(target_rfh->GetProcess())
 275             ->message_port_message_filter());
 276     BrowserThread::PostTask(
 277         BrowserThread::IO, FROM_HERE,
 278         base::Bind(&MessagePortMessageFilter::RouteMessageEventWithMessagePorts,
 279                    message_port_message_filter, target_rfh->GetRoutingID(),
 280                    new_params));
 281   } else {
 282     target_rfh->Send(
 283         new FrameMsg_PostMessageEvent(target_rfh->GetRoutingID(), new_params));
 284   }
 285 }
 286
 287 }  // namespace content