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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.
#include "chrome/browser/site_isolation/site_details.h"
#include "base/metrics/histogram_functions.h"
#include "base/metrics/histogram_macros.h"
#include "base/trace_event/trace_event.h"
#include "base/tracing/protos/chrome_track_event.pbzero.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/page.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/site_isolation_policy.h"
#include "extensions/buildflags/buildflags.h"
#include "url/origin.h"
#if BUILDFLAG(ENABLE_EXTENSIONS)
#include "extensions/browser/extension_registry.h"
#include "extensions/common/constants.h"
#include "extensions/common/extension.h"
#endif
using content::BrowserThread;
using content::RenderFrameHost;
namespace {
content::SiteInstance* DeterminePrimarySiteInstance(
content::SiteInstance* site_instance,
SiteData* site_data) {
TRACE_EVENT1("navigation", "DeterminePrimarySiteInstance", "site_instance",
site_instance);
// Find the BrowsingInstance this WebContents belongs to by iterating over
// the "primary" SiteInstances of each BrowsingInstance we've seen so far.
for (auto& entry : site_data->browsing_instances) {
BrowsingInstanceInfo* browsing_instance = &entry.second;
content::SiteInstance* primary_for_browsing_instance = entry.first;
if (site_instance->IsRelatedSiteInstance(primary_for_browsing_instance)) {
browsing_instance->site_instances.insert(site_instance);
return primary_for_browsing_instance;
}
}
// Add |instance| as the "primary" SiteInstance of a new BrowsingInstance.
BrowsingInstanceInfo* browsing_instance =
&site_data->browsing_instances[site_instance];
browsing_instance->site_instances.insert(site_instance);
return site_instance;
}
} // namespace
BrowsingInstanceInfo::BrowsingInstanceInfo() = default;
BrowsingInstanceInfo::BrowsingInstanceInfo(const BrowsingInstanceInfo& other) =
default;
BrowsingInstanceInfo::~BrowsingInstanceInfo() = default;
SiteData::SiteData() = default;
SiteData::SiteData(const SiteData& other) = default;
SiteData::~SiteData() = default;
void SiteDetails::CollectSiteInfo(content::Page& page, SiteData* site_data) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
page.GetMainDocument().ForEachRenderFrameHost(
[site_data](RenderFrameHost* frame) {
// Each Page (whether primary or nested) will have its own primary
// SiteInstance and BrowsingInstance. With MPArch we may have multiple
// pages which could be in separate BrowsingInstances for nested pages.
content::SiteInstance* primary = DeterminePrimarySiteInstance(
frame->GetPage().GetMainDocument().GetSiteInstance(), site_data);
BrowsingInstanceInfo* browsing_instance =
&site_data->browsing_instances[primary];
// Ensure that we add the frame's SiteInstance to |site_instances|.
DCHECK(frame->GetSiteInstance()->IsRelatedSiteInstance(primary));
browsing_instance->site_instances.insert(frame->GetSiteInstance());
browsing_instance->proxy_count += frame->GetProxyCount();
if (frame->GetParent()) {
if (frame->GetSiteInstance() != frame->GetParent()->GetSiteInstance())
site_data->out_of_process_frames++;
} else {
// We are a main frame. If we are an inner frame tree and our parent's
// process doesn't match ours, count it.
if (frame->GetParentOrOuterDocument() &&
frame->GetParentOrOuterDocument()->GetProcess() !=
frame->GetProcess()) {
site_data->out_of_process_inner_frame_trees++;
}
}
});
}
int SiteDetails::EstimateOriginAgentClusterOverhead(const SiteData& site_data) {
if (!content::SiteIsolationPolicy::
IsProcessIsolationForOriginAgentClusterEnabled()) {
return 0;
}
DCHECK_CURRENTLY_ON(BrowserThread::UI);
int oac_overhead = 0;
// We only want to call GetOacOverhead() once per BrowsingInstance, so only
// call it using the primary SiteInstance.
for (auto& entry : site_data.browsing_instances)
oac_overhead += entry.first->EstimateOriginAgentClusterOverheadForMetrics();
return oac_overhead;
}
void SiteDetails::UpdateHistograms(
const BrowserContextSiteDataMap& site_data_map,
size_t live_process_count) {
// Sum the number of sites and SiteInstances in each BrowserContext and
// the total number of out-of-process iframes.
int num_browsing_instances = 0;
int num_oopifs = 0;
int num_proxies = 0;
int num_oop_inner_frame_trees = 0;
int extra_processes_from_oac = 0;
for (auto& site_data_map_entry : site_data_map) {
const SiteData& site_data = site_data_map_entry.second;
for (const auto& entry : site_data.browsing_instances) {
const BrowsingInstanceInfo& browsing_instance_info = entry.second;
UMA_HISTOGRAM_COUNTS_100("SiteIsolation.SiteInstancesPerBrowsingInstance",
browsing_instance_info.site_instances.size());
UMA_HISTOGRAM_COUNTS_10000("SiteIsolation.ProxyCountPerBrowsingInstance",
browsing_instance_info.proxy_count);
num_proxies += browsing_instance_info.proxy_count;
}
num_browsing_instances += site_data.browsing_instances.size();
num_oopifs += site_data.out_of_process_frames;
num_oop_inner_frame_trees += site_data.out_of_process_inner_frame_trees;
extra_processes_from_oac += EstimateOriginAgentClusterOverhead(site_data);
}
int oac_overhead_percent =
live_process_count == 0
? 0
: static_cast<int>(100 *
(static_cast<float>(extra_processes_from_oac) /
static_cast<float>(live_process_count)));
base::UmaHistogramCounts100("SiteIsolation.BrowsingInstanceCount",
num_browsing_instances);
base::UmaHistogramCounts10000("SiteIsolation.ProxyCount", num_proxies);
base::UmaHistogramCounts100("SiteIsolation.OutOfProcessIframes", num_oopifs);
base::UmaHistogramCounts100("SiteIsolation.OutOfProcessInnerFrameTrees",
num_oop_inner_frame_trees);
// Log metrics related to the actual & potential process overhead of isolated
// sandboxed iframes.
RenderFrameHost::LogSandboxedIframesIsolationMetrics();
if (!content::SiteIsolationPolicy::
IsProcessIsolationForOriginAgentClusterEnabled()) {
return;
}
UMA_HISTOGRAM_COUNTS_1000(
"Memory.RenderProcessHost.Count2.OriginAgentClusterOverhead",
extra_processes_from_oac);
UMA_HISTOGRAM_PERCENTAGE(
"Memory.RenderProcessHost.Percent.OriginAgentClusterOverhead",
oac_overhead_percent);
}
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