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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_SITE_ISOLATION_SITE_DETAILS_H_
#define CHROME_BROWSER_SITE_ISOLATION_SITE_DETAILS_H_
#include <stdint.h>
#include <map>
#include <set>
#include "base/memory/raw_ptr.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/site_instance.h"
namespace content {
class Page;
} // namespace content
// Collects metrics about an actual browsing instance in the current session.
struct BrowsingInstanceInfo {
BrowsingInstanceInfo();
BrowsingInstanceInfo(const BrowsingInstanceInfo& other);
~BrowsingInstanceInfo();
std::set<raw_ptr<content::SiteInstance, SetExperimental>> site_instances;
int proxy_count = 0;
};
using BrowsingInstanceMap =
std::map<content::SiteInstance*, BrowsingInstanceInfo>;
// Information about the sites and SiteInstances in each BrowsingInstance, for
// use in estimating the number of processes needed for various process models.
struct SiteData {
SiteData();
SiteData(const SiteData& other);
~SiteData();
// This map groups related SiteInstances together into BrowsingInstances. The
// first SiteInstance we see in a BrowsingInstance is designated as the
// 'primary' SiteInstance, and becomes the key of this map.
BrowsingInstanceMap browsing_instances;
// A count of all RenderFrameHosts, which are in a different SiteInstance from
// their parents. This does not include guestviews or fencedframes.
int out_of_process_frames = 0;
// A count of all inner frame trees which are in a different RenderProcessHost
// from their parents.
int out_of_process_inner_frame_trees = 0;
// Estimated increase in process count due to OriginAgentCluster (OAC)
// SiteInstances over all elements in |browsing_instances|.
int oac_overhead;
};
// Maps a BrowserContext to information about the sites it contains.
typedef std::map<content::BrowserContext*, SiteData> BrowserContextSiteDataMap;
class SiteDetails {
public:
SiteDetails(const SiteDetails&) = delete;
SiteDetails& operator=(const SiteDetails&) = delete;
// Collect information about all committed sites in the given Page
// on the UI thread.
static void CollectSiteInfo(content::Page& page, SiteData* site_data);
// Collect count of OriginAgentCluster SiteInstances, and compare to what we
// would expect with OAC off (and no coalescing different BrowsingInstances
// into shared RenderProcesses).
static int EstimateOriginAgentClusterOverhead(const SiteData& site_data);
// Updates the global histograms for tracking memory usage.
static void UpdateHistograms(const BrowserContextSiteDataMap& site_data_map,
size_t live_process_count);
private:
// Only static methods - never needs to be constructed.
SiteDetails() = delete;
~SiteDetails() = delete;
};
#endif // CHROME_BROWSER_SITE_ISOLATION_SITE_DETAILS_H_
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