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                     frame_tree_node_->IsMainFrame());
  63   if (render_view_host)
  64     frame_tree_node_->frame_tree()->AddRenderViewHostRef(render_view_host_);
  65
  66   bool is_proxy_to_parent = !frame_tree_node_->IsMainFrame() &&
  67                             frame_tree_node_->parent()
  68                                     ->render_manager()
  69                                     ->current_frame_host()
  70                                     ->GetSiteInstance() == site_instance;
  71   bool is_proxy_to_outer_delegate =
  72       frame_tree_node_->IsMainFrame() &&
  73       frame_tree_node_->render_manager()->ForInnerDelegate();
  74
  75   // If this is a proxy to parent frame or this proxy is for the inner
  76   // WebContents's FrameTreeNode in outer WebContents's SiteInstance, then we
  77   // need a CrossProcessFrameConnector.
  78   if (is_proxy_to_parent || is_proxy_to_outer_delegate) {
  79     // The RenderFrameHost navigating cross-process is destroyed and a proxy for
  80     // it is created in the parent's process. CrossProcessFrameConnector
  81     // initialization only needs to happen on an initial cross-process
  82     // navigation, when the RenderFrameHost leaves the same process as its
  83     // parent. The same CrossProcessFrameConnector is used for subsequent cross-
  84     // process navigations, but it will be destroyed if the frame is
  85     // navigated back to the same SiteInstance as its parent.
  86     cross_process_frame_connector_.reset(new CrossProcessFrameConnector(this));
  87   }
  88 }
  89
  90 RenderFrameProxyHost::~RenderFrameProxyHost() {
  91   if (GetProcess()->HasConnection()) {
  92     // TODO(nasko): For now, don't send this IPC for top-level frames, as
  93     // the top-level RenderFrame will delete the RenderFrameProxy.
  94     // This can be removed once we don't have a swapped out state on
  95     // RenderFrame. See https://crbug.com/357747
  96     if (!frame_tree_node_->IsMainFrame())
  97       Send(new FrameMsg_DeleteProxy(routing_id_));
  98   }
  99
 100   if (render_view_host_)
 101     frame_tree_node_->frame_tree()->ReleaseRenderViewHostRef(render_view_host_);
 102   GetProcess()->RemoveRoute(routing_id_);
 103   g_routing_id_frame_proxy_map.Get().erase(
 104       RenderFrameProxyHostID(GetProcess()->GetID(), routing_id_));
 105 }
 106
 107 void RenderFrameProxyHost::SetChildRWHView(RenderWidgetHostView* view) {
 108   cross_process_frame_connector_->set_view(
 109       static_cast<RenderWidgetHostViewChildFrame*>(view));
 110 }
 111
 112 RenderViewHostImpl* RenderFrameProxyHost::GetRenderViewHost() {
 113   return frame_tree_node_->frame_tree()->GetRenderViewHost(
 114       site_instance_.get());
 115 }
 116
 117 RenderWidgetHostView* RenderFrameProxyHost::GetRenderWidgetHostView() {
 118   return frame_tree_node_->parent()->render_manager()
 119       ->GetRenderWidgetHostView();
 120 }
 121
 122 void RenderFrameProxyHost::TakeFrameHostOwnership(
 123     scoped_ptr<RenderFrameHostImpl> render_frame_host) {
 124   CHECK(render_frame_host_ == nullptr);
 125   render_frame_host_ = render_frame_host.Pass();
 126   render_frame_host_->set_render_frame_proxy_host(this);
 127 }
 128
 129 scoped_ptr<RenderFrameHostImpl> RenderFrameProxyHost::PassFrameHostOwnership() {
 130   render_frame_host_->set_render_frame_proxy_host(NULL);
 131   return render_frame_host_.Pass();
 132 }
 133
 134 bool RenderFrameProxyHost::Send(IPC::Message *msg) {
 135   return GetProcess()->Send(msg);
 136 }
 137
 138 bool RenderFrameProxyHost::OnMessageReceived(const IPC::Message& msg) {
 139   if (cross_process_frame_connector_.get() &&
 140       cross_process_frame_connector_->OnMessageReceived(msg))
 141     return true;
 142
 143   bool handled = true;
 144   IPC_BEGIN_MESSAGE_MAP(RenderFrameProxyHost, msg)
 145     IPC_MESSAGE_HANDLER(FrameHostMsg_Detach, OnDetach)
 146     IPC_MESSAGE_HANDLER(FrameHostMsg_OpenURL, OnOpenURL)
 147     IPC_MESSAGE_HANDLER(FrameHostMsg_RouteMessageEvent, OnRouteMessageEvent)
 148     IPC_MESSAGE_UNHANDLED(handled = false)
 149   IPC_END_MESSAGE_MAP()
 150   return handled;
 151 }
 152
 153 bool RenderFrameProxyHost::InitRenderFrameProxy() {
 154   DCHECK(!render_frame_proxy_created_);
 155
 156   // It is possible to reach this when the process is dead (in particular, when
 157   // creating proxies from CreateProxiesForChildFrame).  In that case, don't
 158   // create the proxy.  The process shouldn't be resurrected just to create
 159   // RenderFrameProxies; it should be restored only if it needs to host a
 160   // RenderFrame.  When that happens, the process will be reinitialized, and
 161   // all necessary proxies, including any of the ones we skipped here, will be
 162   // created by CreateProxiesForSiteInstance. See https://crbug.com/476846
 163   if (!GetProcess()->HasConnection())
 164     return false;
 165
 166   int parent_routing_id = MSG_ROUTING_NONE;
 167   if (frame_tree_node_->parent()) {
 168     // It is safe to use GetRenderFrameProxyHost to get the parent proxy, since
 169     // new child frames always start out as local frames, so a new proxy should
 170     // never have a RenderFrameHost as a parent.
 171     RenderFrameProxyHost* parent_proxy =
 172         frame_tree_node_->parent()->render_manager()->GetRenderFrameProxyHost(
 173             site_instance_.get());
 174     CHECK(parent_proxy);
 175
 176     // Proxies that aren't live in the parent node should not be initialized
 177     // here, since there is no valid parent RenderFrameProxy on the renderer
 178     // side.  This can happen when adding a new child frame after an opener
 179     // process crashed and was reloaded.  See https://crbug.com/501152.
 180     if (!parent_proxy->is_render_frame_proxy_live())
 181       return false;
 182
 183     parent_routing_id = parent_proxy->GetRoutingID();
 184     CHECK_NE(parent_routing_id, MSG_ROUTING_NONE);
 185   }
 186
 187   Send(new FrameMsg_NewFrameProxy(routing_id_,
 188                                   parent_routing_id,
 189                                   frame_tree_node_->frame_tree()
 190                                       ->GetRenderViewHost(site_instance_.get())
 191                                       ->GetRoutingID(),
 192                                   frame_tree_node_
 193                                       ->current_replication_state()));
 194
 195   render_frame_proxy_created_ = true;
 196   return true;
 197 }
 198
 199 void RenderFrameProxyHost::DisownOpener() {
 200   Send(new FrameMsg_DisownOpener(GetRoutingID()));
 201 }
 202
 203 void RenderFrameProxyHost::OnDetach() {
 204   if (frame_tree_node_->render_manager()->ForInnerDelegate()) {
 205     // Only main frame proxy can detach for inner WebContents.
 206     DCHECK(frame_tree_node_->IsMainFrame());
 207     frame_tree_node_->render_manager()->RemoveOuterDelegateFrame();
 208     return;
 209   }
 210
 211   // This message should only be received for subframes.  Note that we can't
 212   // restrict it to just the current SiteInstances of the ancestors of this
 213   // frame, because another frame in the tree may be able to detach this frame
 214   // by navigating its parent.
 215   if (frame_tree_node_->IsMainFrame()) {
 216     bad_message::ReceivedBadMessage(GetProcess(), bad_message::RFPH_DETACH);
 217     return;
 218   }
 219   frame_tree_node_->frame_tree()->RemoveFrame(frame_tree_node_);
 220 }
 221
 222 void RenderFrameProxyHost::OnOpenURL(
 223     const FrameHostMsg_OpenURL_Params& params) {
 224   // TODO(creis): Verify that we are in the same BrowsingInstance as the current
 225   // RenderFrameHost.  See NavigatorImpl::RequestOpenURL.
 226   frame_tree_node_->current_frame_host()->OpenURL(params, site_instance_.get());
 227 }
 228
 229 void RenderFrameProxyHost::OnRouteMessageEvent(
 230     const FrameMsg_PostMessage_Params& params) {
 231   RenderFrameHostImpl* target_rfh = frame_tree_node()->current_frame_host();
 232
 233   // Only deliver the message if the request came from a RenderFrameHost in the
 234   // same BrowsingInstance or if this WebContents is dedicated to a browser
 235   // plugin guest.
 236   //
 237   // TODO(alexmos, lazyboy):  The check for browser plugin guest currently
 238   // requires going through the delegate.  It should be refactored and
 239   // performed here once OOPIF support in <webview> is further along.
 240   SiteInstance* target_site_instance = target_rfh->GetSiteInstance();
 241   if (!target_site_instance->IsRelatedSiteInstance(GetSiteInstance()) &&
 242       !target_rfh->delegate()->ShouldRouteMessageEvent(target_rfh,
 243                                                        GetSiteInstance()))
 244     return;
 245
 246   FrameMsg_PostMessage_Params new_params(params);
 247
 248   // If there is a source_routing_id, translate it to the routing ID of the
 249   // equivalent RenderFrameProxyHost in the target process.
 250   if (new_params.source_routing_id != MSG_ROUTING_NONE) {
 251     RenderFrameHostImpl* source_rfh = RenderFrameHostImpl::FromID(
 252         GetProcess()->GetID(), new_params.source_routing_id);
 253     if (!source_rfh) {
 254       new_params.source_routing_id = MSG_ROUTING_NONE;
 255     } else {
 256       // Ensure that we have a swapped-out RVH and proxy for the source frame
 257       // in the target SiteInstance. If it doesn't exist, create it on demand
 258       // and also create its opener chain, since that will also be accessible
 259       // to the target page.
 260       target_rfh->delegate()->EnsureOpenerProxiesExist(source_rfh);
 261
 262       // If the message source is a cross-process subframe, its proxy will only
 263       // be created in --site-per-process mode.  If the proxy wasn't created,
 264       // set the source routing ID to MSG_ROUTING_NONE (see
 265       // https://crbug.com/485520 for discussion on why this is ok).
 266       RenderFrameProxyHost* source_proxy_in_target_site_instance =
 267           source_rfh->frame_tree_node()
 268               ->render_manager()
 269               ->GetRenderFrameProxyHost(target_site_instance);
 270       if (source_proxy_in_target_site_instance) {
 271         new_params.source_routing_id =
 272             source_proxy_in_target_site_instance->GetRoutingID();
 273       } else {
 274         new_params.source_routing_id = MSG_ROUTING_NONE;
 275       }
 276     }
 277   }
 278
 279   if (!params.message_ports.empty()) {
 280     // Updating the message port information has to be done in the IO thread;
 281     // MessagePortMessageFilter::RouteMessageEventWithMessagePorts will send
 282     // FrameMsg_PostMessageEvent after it's done. Note that a trivial solution
 283     // would've been to post a task on the IO thread to do the IO-thread-bound
 284     // work, and make that post a task back to WebContentsImpl in the UI
 285     // thread. But we cannot do that, since there's nothing to guarantee that
 286     // WebContentsImpl stays alive during the round trip.
 287     scoped_refptr<MessagePortMessageFilter> message_port_message_filter(
 288         static_cast<RenderProcessHostImpl*>(target_rfh->GetProcess())
 289             ->message_port_message_filter());
 290     BrowserThread::PostTask(
 291         BrowserThread::IO, FROM_HERE,
 292         base::Bind(&MessagePortMessageFilter::RouteMessageEventWithMessagePorts,
 293                    message_port_message_filter, target_rfh->GetRoutingID(),
 294                    new_params));
 295   } else {
 296     target_rfh->Send(
 297         new FrameMsg_PostMessageEvent(target_rfh->GetRoutingID(), new_params));
 298   }
 299 }
 300
 301 }  // namespace content