Cross-process postMessage

content/browser/renderer_host/render_view_host.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/render_view_host.h"
 
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/i18n/rtl.h"
 #include "base/json/json_reader.h"
 #include "base/message_loop.h"
 #include "base/stl_util.h"
 #include "base/string_util.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "content/browser/child_process_security_policy.h"
+#include "content/browser/content_frame.h"
 #include "content/browser/cross_site_request_manager.h"
+#include "content/browser/frame_map.h"
 #include "content/browser/host_zoom_map.h"
 #include "content/browser/in_process_webkit/session_storage_namespace.h"
 #include "content/browser/power_save_blocker.h"
 #include "content/browser/renderer_host/render_process_host_impl.h"
 #include "content/browser/renderer_host/render_view_host_delegate.h"
 #include "content/browser/renderer_host/render_widget_host.h"
 #include "content/browser/renderer_host/render_widget_host_view.h"
 #include "content/browser/site_instance.h"
 #include "content/common/desktop_notification_messages.h"
 #include "content/common/drag_messages.h"
@@ skipping 122 matching lines @@
   ClearPowerSaveBlockers();
 
   delegate()->RenderViewDeleted(this);
 
   // Be sure to clean up any leftover state from cross-site requests.
   CrossSiteRequestManager::GetInstance()->SetHasPendingCrossSiteRequest(
       process()->GetID(), routing_id(), false);
 }
 
 bool RenderViewHost::CreateRenderView(const string16& frame_name,
+                                      int opener_route_id,
                                       int32 max_page_id) {
   DCHECK(!IsRenderViewLive()) << "Creating view twice";
 
   // The process may (if we're sharing a process with another host that already
   // initialized it) or may not (we have our own process or the old process
   // crashed) have been initialized. Calling Init multiple times will be
   // ignored, so this is safe.
   if (!process()->Init(renderer_accessible()))
     return false;
   DCHECK(process()->HasConnection());
@@ skipping 11 matching lines @@
     next_page_id = max_page_id + 1;
 
   ViewMsg_New_Params params;
   params.parent_window = GetNativeViewId();
   params.renderer_preferences =
       delegate_->GetRendererPrefs(process()->GetBrowserContext());
   params.web_preferences = delegate_->GetWebkitPrefs();
   params.view_id = routing_id();
   params.session_storage_namespace_id = session_storage_namespace_->id();
   params.frame_name = frame_name;
+  params.opener_route_id = opener_route_id;
   params.next_page_id = next_page_id;
   Send(new ViewMsg_New(params));
 
   // If it's enabled, tell the renderer to set up the Javascript bindings for
   // sending messages back to the browser.
   Send(new ViewMsg_AllowBindings(routing_id(), enabled_bindings_));
   // Let our delegate know that we created a RenderView.
   delegate_->RenderViewCreated(this);
 
   FOR_EACH_OBSERVER(
@@ skipping 117 matching lines @@
     // handler.
     is_waiting_for_beforeunload_ack_ = true;
     unload_ack_is_for_cross_site_transition_ = for_cross_site_transition;
     StartHangMonitorTimeout(TimeDelta::FromMilliseconds(kUnloadTimeoutMS));
     Send(new ViewMsg_ShouldClose(routing_id()));
   }
 }
 
 void RenderViewHost::SwapOut(int new_render_process_host_id,
                              int new_request_id) {
+  content::FrameMap& frame_mapper =

[awong, 2011/12/21 01:56:07]

Should this be a const_ref?

+      process()->GetBrowserContext()->frame_mapper();
+  content::ContentFrame* topLevelFrame =
+      frame_mapper.FindTopLevelFrame(process()->GetID(), routing_id());
+  // TODO(supersat): Sometimes this can be null. Why?
+  DCHECK(topLevelFrame);

[jam, 2011/12/22 20:06:53]

nit: dcheck not needed, will crash below. also top_level_frame

+
+  SwapOutAndProxy(new_render_process_host_id, new_request_id,
+                  topLevelFrame->id());
+}
+
+void RenderViewHost::SwapOutAndProxy(int new_render_process_host_id,
+                                     int new_request_id,
+                                     int64 content_frame) {
   // Start filtering IPC messages to avoid confusing the delegate.  This will
   // prevent any dialogs from appearing during unload handlers, but we've
   // already decided to silence them in crbug.com/68780.  We will set it back
   // to false in SetNavigationsSuspended if we swap back in.
   is_swapped_out_ = true;
 
   // This will be set back to false in OnSwapOutACK, just before we replace
   // this RVH with the pending RVH.
   is_waiting_for_unload_ack_ = true;
   // Start the hang monitor in case the renderer hangs in the unload handler.
   StartHangMonitorTimeout(TimeDelta::FromMilliseconds(kUnloadTimeoutMS));
 
   ViewMsg_SwapOut_Params params;
   params.closing_process_id = process()->GetID();
   params.closing_route_id = routing_id();
   params.new_render_process_host_id = new_render_process_host_id;
   params.new_request_id = new_request_id;
+  params.content_frame_id = content_frame;
+
   if (IsRenderViewLive()) {
     Send(new ViewMsg_SwapOut(routing_id(), params));
   } else {
     // This RenderViewHost doesn't have a live renderer, so just skip the unload
     // event.  We must notify the ResourceDispatcherHost on the IO thread,
     // which we will do through the RenderProcessHost's widget helper.
     process()->CrossSiteSwapOutACK(params);
   }
 }
 
@@ skipping 414 matching lines @@
   return true;
 }
 
 void RenderViewHost::CreateNewWindow(
     int route_id,
     const ViewHostMsg_CreateWindow_Params& params) {
   RenderViewHostDelegate::View* view = delegate_->GetViewDelegate();
   if (!view)
     return;
 
-  view->CreateNewWindow(route_id, params);
+  // Translate the opener_frame_id into a ContentFrame while we still know what
+  // process it was created on.
+
+  content::FrameMap& frame_map =

[awong, 2011/12/21 01:56:07]

const ref?

+      process()->GetBrowserContext()->frame_mapper();
+  content::ContentFrame* opener =
+      frame_map.FindRendererFrame(process()->GetID(), params.opener_frame_id);
+  view->CreateNewWindow(route_id, params, opener);
 }
 
 void RenderViewHost::CreateNewWidget(int route_id,
                                      WebKit::WebPopupType popup_type) {
   RenderViewHostDelegate::View* view = delegate_->GetViewDelegate();
   if (view)
     view->CreateNewWidget(route_id, popup_type);
 }
 
 void RenderViewHost::CreateNewFullscreenWidget(int route_id) {
@@ skipping 738 matching lines @@
 
 void RenderViewHost::OnWebUISend(const GURL& source_url,
                                  const std::string& name,
                                  const base::ListValue& args) {
   delegate_->WebUISend(this, source_url, name, args);
 }
 
 void RenderViewHost::ClearPowerSaveBlockers() {
   STLDeleteValues(&power_save_blockers_);
 }