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// Copyright 2013 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 "chrome/browser/site_details.h"
#include "base/metrics/histogram.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_process_host.h"
#include "extensions/common/constants.h"
using content::BrowserThread;
using content::RenderProcessHost;
using content::SiteInstance;
using content::WebContents;
namespace {
bool ShouldIsolate(IsolationScenarioType policy, const GURL& site) {
switch (policy) {
case ISOLATE_ALL_SITES:
return true;
case ISOLATE_HTTPS_SITES:
// Note: For estimation purposes "isolate https sites" is really
// implemented as "isolate non-http sites". This means that, for example,
// the New Tab Page gets counted as two processes under this policy, and
// extensions are isolated as well.
return !site.SchemeIs(url::kHttpScheme);
case ISOLATE_EXTENSIONS:
return site.SchemeIs(extensions::kExtensionScheme);
}
NOTREACHED();
return true;
}
} // namespace
IsolationScenario::IsolationScenario() : policy(ISOLATE_ALL_SITES) {}
IsolationScenario::~IsolationScenario() {}
void IsolationScenario::CollectSiteInfoForScenario(SiteInstance* primary,
const GURL& site) {
const GURL& isolated = ShouldIsolate(policy, site) ? site : GURL("http://");
sites.insert(isolated);
browsing_instance_site_map[primary->GetId()].insert(isolated);
}
SiteData::SiteData() {
scenarios[ISOLATE_ALL_SITES].policy = ISOLATE_ALL_SITES;
scenarios[ISOLATE_HTTPS_SITES].policy = ISOLATE_HTTPS_SITES;
scenarios[ISOLATE_EXTENSIONS].policy = ISOLATE_EXTENSIONS;
}
SiteData::~SiteData() {}
SiteDetails::SiteDetails() {}
SiteDetails::~SiteDetails() {}
void SiteDetails::CollectSiteInfo(WebContents* contents,
SiteData* site_data) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
content::BrowserContext* browser_context = contents->GetBrowserContext();
// Find the BrowsingInstance this WebContents belongs to by iterating over
// the "primary" SiteInstances of each BrowsingInstance we've seen so far.
SiteInstance* instance = contents->GetSiteInstance();
SiteInstance* primary = NULL;
for (SiteInstance* already_collected_instance : site_data->instances) {
if (instance->IsRelatedSiteInstance(already_collected_instance)) {
primary = already_collected_instance;
break;
}
}
if (!primary) {
// Remember this as the "primary" SiteInstance of a new BrowsingInstance.
primary = instance;
site_data->instances.push_back(instance);
}
// Now keep track of how many sites we have in this BrowsingInstance (and
// overall), including sites in iframes.
for (const GURL& site : contents->GetSitesInTab()) {
// Make sure we don't overcount process-per-site sites, like the NTP or
// extensions, by skipping over them if they're already logged for
// ISOLATE_ALL_SITES.
if (RenderProcessHost::ShouldUseProcessPerSite(browser_context, site) &&
site_data->scenarios[ISOLATE_ALL_SITES].sites.find(site) !=
site_data->scenarios[ISOLATE_ALL_SITES].sites.end()) {
continue;
}
for (IsolationScenario& scenario : site_data->scenarios) {
scenario.CollectSiteInfoForScenario(primary, site);
}
}
}
void SiteDetails::UpdateHistograms(
const BrowserContextSiteDataMap& site_data_map,
int all_renderer_process_count,
int non_renderer_process_count) {
// Reports a set of site-based process metrics to UMA.
int process_limit = RenderProcessHost::GetMaxRendererProcessCount();
// Sum the number of sites and SiteInstances in each BrowserContext.
int num_sites[ISOLATION_SCENARIO_LAST + 1] = {};
int num_isolated_site_instances[ISOLATION_SCENARIO_LAST + 1] = {};
int num_browsing_instances = 0;
for (BrowserContextSiteDataMap::const_iterator i = site_data_map.begin();
i != site_data_map.end(); ++i) {
for (const IsolationScenario& scenario : i->second.scenarios) {
num_sites[scenario.policy] += scenario.sites.size();
for (auto& browsing_instance : scenario.browsing_instance_site_map) {
num_isolated_site_instances[scenario.policy] +=
browsing_instance.second.size();
}
}
num_browsing_instances += i->second.scenarios[ISOLATE_ALL_SITES]
.browsing_instance_site_map.size();
}
// Predict the number of processes needed when isolating all sites, when
// isolating only HTTPS sites, and when isolating extensions.
int process_count_lower_bound[ISOLATION_SCENARIO_LAST + 1];
int process_count_upper_bound[ISOLATION_SCENARIO_LAST + 1];
int process_count_estimate[ISOLATION_SCENARIO_LAST + 1];
for (int policy = 0; policy <= ISOLATION_SCENARIO_LAST; policy++) {
process_count_lower_bound[policy] = num_sites[policy];
process_count_upper_bound[policy] = num_sites[policy] + process_limit - 1;
process_count_estimate[policy] = std::min(
num_isolated_site_instances[policy], process_count_upper_bound[policy]);
}
// Just renderer process count:
UMA_HISTOGRAM_COUNTS_100("SiteIsolation.CurrentRendererProcessCount",
all_renderer_process_count);
UMA_HISTOGRAM_COUNTS_100(
"SiteIsolation.BrowsingInstanceCount",
num_browsing_instances);
UMA_HISTOGRAM_COUNTS_100("SiteIsolation.IsolateAllSitesProcessCountNoLimit",
num_isolated_site_instances[ISOLATE_ALL_SITES]);
UMA_HISTOGRAM_COUNTS_100(
"SiteIsolation.IsolateAllSitesProcessCountLowerBound",
process_count_lower_bound[ISOLATE_ALL_SITES]);
UMA_HISTOGRAM_COUNTS_100("SiteIsolation.IsolateAllSitesProcessCountEstimate",
process_count_estimate[ISOLATE_ALL_SITES]);
UMA_HISTOGRAM_COUNTS_100("SiteIsolation.IsolateHttpsSitesProcessCountNoLimit",
num_isolated_site_instances[ISOLATE_HTTPS_SITES]);
UMA_HISTOGRAM_COUNTS_100(
"SiteIsolation.IsolateHttpsSitesProcessCountLowerBound",
process_count_lower_bound[ISOLATE_HTTPS_SITES]);
UMA_HISTOGRAM_COUNTS_100(
"SiteIsolation.IsolateHttpsSitesProcessCountEstimate",
process_count_estimate[ISOLATE_HTTPS_SITES]);
UMA_HISTOGRAM_COUNTS_100("SiteIsolation.IsolateExtensionsProcessCountNoLimit",
num_isolated_site_instances[ISOLATE_EXTENSIONS]);
UMA_HISTOGRAM_COUNTS_100(
"SiteIsolation.IsolateExtensionsProcessCountLowerBound",
process_count_lower_bound[ISOLATE_EXTENSIONS]);
UMA_HISTOGRAM_COUNTS_100(
"SiteIsolation.IsolateExtensionsProcessCountEstimate",
process_count_estimate[ISOLATE_EXTENSIONS]);
// Total process count:
UMA_HISTOGRAM_COUNTS_100(
"SiteIsolation.IsolateAllSitesTotalProcessCountEstimate",
process_count_estimate[ISOLATE_ALL_SITES] + non_renderer_process_count);
UMA_HISTOGRAM_COUNTS_100(
"SiteIsolation.IsolateHttpsSitesTotalProcessCountEstimate",
process_count_estimate[ISOLATE_HTTPS_SITES] + non_renderer_process_count);
UMA_HISTOGRAM_COUNTS_100(
"SiteIsolation.IsolateExtensionsTotalProcessCountEstimate",
process_count_estimate[ISOLATE_EXTENSIONS] + non_renderer_process_count);
}
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