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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/site_instance_group.h"
#include "base/auto_reset.h"
#include "base/observer_list.h"
#include "content/browser/renderer_host/render_process_host_impl.h"
#include "content/browser/site_instance_impl.h"
#include "content/public/browser/render_process_host.h"
namespace content {
namespace {
SiteInstanceGroupId::Generator site_instance_group_id_generator;
} // namespace
SiteInstanceGroup::SiteInstanceGroup(BrowsingInstance* browsing_instance,
RenderProcessHost* process)
: id_(site_instance_group_id_generator.GenerateNextId()),
browsing_instance_(browsing_instance),
process_(process->GetSafeRef()),
agent_scheduling_group_(
AgentSchedulingGroupHost::GetOrCreate(*this, *process)
->GetSafeRef()) {
process->AddObserver(this);
}
SiteInstanceGroup::~SiteInstanceGroup() {
// Make sure `this` is not getting destructed while observers are still being
// notified.
CHECK(!is_notifying_observers_);
process_->RemoveObserver(this);
}
SiteInstanceGroupId SiteInstanceGroup::GetId() const {
return id_;
}
base::SafeRef<SiteInstanceGroup> SiteInstanceGroup::GetSafeRef() {
return weak_ptr_factory_.GetSafeRef();
}
base::WeakPtr<SiteInstanceGroup> SiteInstanceGroup::GetWeakPtr() {
return weak_ptr_factory_.GetWeakPtr();
}
base::WeakPtr<SiteInstanceGroup>
SiteInstanceGroup::GetWeakPtrToAllowDangling() {
return weak_ptr_factory_.GetWeakPtr();
}
void SiteInstanceGroup::AddObserver(Observer* observer) {
observers_.AddObserver(observer);
}
void SiteInstanceGroup::RemoveObserver(Observer* observer) {
observers_.RemoveObserver(observer);
}
void SiteInstanceGroup::AddSiteInstance(SiteInstanceImpl* site_instance) {
CHECK(site_instance);
CHECK(!site_instances_.contains(site_instance));
CHECK_EQ(browsing_instance_id(), site_instance->GetBrowsingInstanceId());
site_instances_.insert(site_instance);
}
void SiteInstanceGroup::RemoveSiteInstance(SiteInstanceImpl* site_instance) {
site_instances_.erase(site_instance);
if (site_instances_.empty())
process_->Cleanup();
}
void SiteInstanceGroup::IncrementActiveFrameCount() {
active_frame_count_++;
}
void SiteInstanceGroup::DecrementActiveFrameCount() {
if (--active_frame_count_ == 0) {
base::AutoReset<bool> scope(&is_notifying_observers_, true);
for (auto& observer : observers_) {
observer.ActiveFrameCountIsZero(this);
}
}
}
void SiteInstanceGroup::IncrementKeepAliveCount() {
keep_alive_count_++;
auto* rphi = static_cast<RenderProcessHostImpl*>(process());
if (!rphi->AreRefCountsDisabled()) {
rphi->IncrementNavigationStateKeepAliveCount();
}
}
void SiteInstanceGroup::DecrementKeepAliveCount() {
if (--keep_alive_count_ == 0) {
base::AutoReset<bool> scope(&is_notifying_observers_, true);
for (auto& observer : observers_) {
observer.KeepAliveCountIsZero(this);
}
}
auto* rphi = static_cast<RenderProcessHostImpl*>(process());
if (!rphi->AreRefCountsDisabled()) {
rphi->DecrementNavigationStateKeepAliveCount();
}
}
bool SiteInstanceGroup::IsRelatedSiteInstanceGroup(SiteInstanceGroup* group) {
return browsing_instance_id() == group->browsing_instance_id();
}
void SiteInstanceGroup::RenderProcessHostDestroyed(RenderProcessHost* host) {
DCHECK_EQ(process_->GetDeprecatedID(), host->GetDeprecatedID());
process_->RemoveObserver(this);
// Remove references to `this` from all SiteInstances in this group. That will
// cause `this` to be destructed, to enforce the invariant that a
// SiteInstanceGroup must have a RenderProcessHost.
for (auto instance : site_instances_) {
instance->ResetSiteInstanceGroup();
}
}
void SiteInstanceGroup::RenderProcessExited(
RenderProcessHost* host,
const ChildProcessTerminationInfo& info) {
// Increment the refcount of `this` to keep it alive while iterating over the
// observer list. That will prevent `this` from getting deleted during
// iteration.
scoped_refptr<SiteInstanceGroup> self_refcount = base::WrapRefCounted(this);
base::AutoReset<bool> scope(&is_notifying_observers_, true);
for (auto& observer : observers_)
observer.RenderProcessGone(this, info);
}
const StoragePartitionConfig& SiteInstanceGroup::GetStoragePartitionConfig()
const {
return process()->GetStoragePartition()->GetConfig();
}
// static
SiteInstanceGroup* SiteInstanceGroup::CreateForTesting(
BrowserContext* browser_context,
RenderProcessHost* process) {
return new SiteInstanceGroup(
new BrowsingInstance(browser_context,
WebExposedIsolationInfo::CreateNonIsolated(),
/*is_guest=*/false,
/*is_fenced=*/false,
/*is_fixed_storage_partition=*/false),
process);
}
// static
SiteInstanceGroup* SiteInstanceGroup::CreateForTesting(
SiteInstanceGroup* group,
RenderProcessHost* process) {
return new SiteInstanceGroup(
group->browsing_instance_for_testing(), // IN-TEST
process);
}
void SiteInstanceGroup::WriteIntoTrace(
perfetto::TracedProto<TraceProto> proto) const {
proto->set_site_instance_group_id(GetId().value());
proto->set_active_frame_count(active_frame_count());
proto.Set(TraceProto::kProcess, process());
}
} // namespace content
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