chrome/browser/site_details.h

   1 // Copyright 2013 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 #ifndef CHROME_BROWSER_SITE_DETAILS_H_
   6 #define CHROME_BROWSER_SITE_DETAILS_H_
   7
   8 #include "base/containers/hash_tables.h"
   9 #include "content/public/browser/browser_context.h"
  10 #include "content/public/browser/site_instance.h"
  11 #include "content/public/browser/web_contents.h"
  12
  13 // Maps an ID representing each BrowsingInstance to a set of site URLs.
  14 typedef base::hash_map<int32, std::set<GURL>> BrowsingInstanceSiteMap;
  15
  16 // This enum represents various alternative process model policies that we want
  17 // to evaluate. We'll estimate the process cost of each scenario.
  18 enum IsolationScenarioType {
  19   ISOLATE_ALL_SITES,
  20   ISOLATE_HTTPS_SITES,
  21   ISOLATE_EXTENSIONS,
  22   ISOLATION_SCENARIO_LAST = ISOLATE_EXTENSIONS
  23 };
  24
  25 // Contains the state required to estimate the process count under a particular
  26 // process model. We have one of these per IsolationScenarioType.
  27 struct IsolationScenario {
  28   IsolationScenario();
  29   ~IsolationScenario();
  30
  31   void CollectSiteInfoForScenario(content::SiteInstance* primary,
  32                                   const GURL& site);
  33   void GetProcessCountEstimate();
  34   void GetProcessCountLowerBound();
  35
  36   IsolationScenarioType policy;
  37   std::set<GURL> sites;
  38   BrowsingInstanceSiteMap browsing_instance_site_map;
  39 };
  40
  41 // Information about the sites and SiteInstances in each BrowsingInstance, for
  42 // use in estimating the number of processes needed for various process models.
  43 struct SiteData {
  44   SiteData();
  45   ~SiteData();
  46
  47   // One IsolationScenario object per IsolationScenarioType.
  48   IsolationScenario scenarios[ISOLATION_SCENARIO_LAST + 1];
  49
  50   // Global list of all SiteInstances, used for de-duping related instances.
  51   std::vector<content::SiteInstance*> instances;
  52 };
  53
  54 // Maps a BrowserContext to information about the sites it contains.
  55 typedef base::hash_map<content::BrowserContext*, SiteData>
  56     BrowserContextSiteDataMap;
  57
  58 class SiteDetails {
  59  public:
  60   // Collect information about all committed sites in the given WebContents
  61   // on the UI thread.
  62   static void CollectSiteInfo(content::WebContents* contents,
  63                               SiteData* site_data);
  64
  65   // Updates the global histograms for tracking memory usage.
  66   static void UpdateHistograms(const BrowserContextSiteDataMap& site_data_map,
  67                                int all_renderer_process_count,
  68                                int non_renderer_process_count);
  69
  70  private:
  71   // Never needs to be constructed.
  72   SiteDetails();
  73   ~SiteDetails();
  74
  75   DISALLOW_COPY_AND_ASSIGN(SiteDetails);
  76 };
  77
  78 #endif  // CHROME_BROWSER_SITE_DETAILS_H_