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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_RENDERER_AGENT_SCHEDULING_GROUP_H_
#define CONTENT_RENDERER_AGENT_SCHEDULING_GROUP_H_
#include "base/containers/id_map.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/raw_ref.h"
#include "base/task/single_thread_task_runner.h"
#include "content/common/agent_scheduling_group.mojom.h"
#include "content/common/associated_interfaces.mojom.h"
#include "content/common/buildflags.h"
#include "content/common/content_export.h"
#include "content/public/common/content_features.h"
#include "ipc/ipc.mojom.h"
#include "ipc/ipc_listener.h"
#include "mojo/public/cpp/bindings/associated_receiver.h"
#include "mojo/public/cpp/bindings/associated_receiver_set.h"
#include "mojo/public/cpp/bindings/associated_remote.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "third_party/abseil-cpp/absl/container/flat_hash_map.h"
#include "third_party/blink/public/common/tokens/tokens.h"
#include "third_party/blink/public/mojom/associated_interfaces/associated_interfaces.mojom.h"
#include "third_party/blink/public/mojom/frame/frame_replication_state.mojom-forward.h"
#include "third_party/blink/public/mojom/shared_storage/shared_storage_worklet_service.mojom-forward.h"
#include "third_party/blink/public/mojom/worker/worklet_global_scope_creation_params.mojom-forward.h"
#include "third_party/blink/public/platform/scheduler/web_agent_group_scheduler.h"
namespace IPC {
class Message;
class SyncChannel;
} // namespace IPC
namespace blink {
class WebURL;
class WebView;
} // namespace blink
namespace content {
class RenderFrameImpl;
class RenderThread;
// Renderer-side representation of AgentSchedulingGroup, used for communication
// with the (browser-side) AgentSchedulingGroupHost. AgentSchedulingGroup is
// Blink's unit of scheduling and performance isolation, which is the only way
// to obtain ordering guarantees between different Mojo (associated) interfaces
// and legacy IPC messages.
class CONTENT_EXPORT AgentSchedulingGroup
: public IPC::Listener,
public mojom::AgentSchedulingGroup,
public mojom::RouteProvider,
public blink::mojom::AssociatedInterfaceProvider {
public:
AgentSchedulingGroup(
RenderThread& render_thread,
mojo::PendingReceiver<IPC::mojom::ChannelBootstrap> bootstrap);
AgentSchedulingGroup(
RenderThread& render_thread,
mojo::PendingAssociatedReceiver<mojom::AgentSchedulingGroup> receiver);
~AgentSchedulingGroup() override;
AgentSchedulingGroup(const AgentSchedulingGroup&) = delete;
AgentSchedulingGroup& operator=(const AgentSchedulingGroup&) = delete;
#if BUILDFLAG(CONTENT_ENABLE_LEGACY_IPC)
bool Send(IPC::Message* message);
#endif
void AddFrameRoute(const blink::LocalFrameToken& frame_token,
#if BUILDFLAG(CONTENT_ENABLE_LEGACY_IPC)
int routing_id,
#endif
RenderFrameImpl* render_frame,
scoped_refptr<base::SingleThreadTaskRunner> task_runner);
void RemoveFrameRoute(const blink::LocalFrameToken& frame_token
#if BUILDFLAG(CONTENT_ENABLE_LEGACY_IPC)
,
int routing_id
#endif
);
void DidUnloadRenderFrame(const blink::LocalFrameToken& frame_token);
mojom::RouteProvider* GetRemoteRouteProvider();
blink::scheduler::WebAgentGroupScheduler& agent_group_scheduler() {
return *agent_group_scheduler_;
}
// Create a new WebView in this AgentSchedulingGroup.
blink::WebView* CreateWebView(mojom::CreateViewParamsPtr params,
bool was_created_by_renderer,
const blink::WebURL& base_url);
protected:
// mojom::AgentSchedulingGroup:
void BindAssociatedInterfaces(
mojo::PendingAssociatedRemote<mojom::AgentSchedulingGroupHost>
remote_host,
mojo::PendingAssociatedReceiver<mojom::RouteProvider>
route_provider_receiever) override;
private:
// IPC::Listener:
bool OnMessageReceived(const IPC::Message& message) override;
void OnBadMessageReceived(const IPC::Message& message) override;
void OnAssociatedInterfaceRequest(
const std::string& interface_name,
mojo::ScopedInterfaceEndpointHandle handle) override;
// mojom::AgentSchedulingGroup:
void CreateView(mojom::CreateViewParamsPtr params) override;
void CreateFrame(mojom::CreateFrameParamsPtr params) override;
void CreateSharedStorageWorkletService(
mojo::PendingReceiver<blink::mojom::SharedStorageWorkletService> receiver,
blink::mojom::WorkletGlobalScopeCreationParamsPtr
global_scope_creation_params) override;
// mojom::RouteProvider
void GetRoute(
const blink::LocalFrameToken& frame_token,
mojo::PendingAssociatedReceiver<blink::mojom::AssociatedInterfaceProvider>
receiver) override;
// blink::mojom::AssociatedInterfaceProvider
void GetAssociatedInterface(
const std::string& name,
mojo::PendingAssociatedReceiver<blink::mojom::AssociatedInterface>
receiver) override;
RenderFrameImpl* GetListener(const blink::LocalFrameToken& frame_token);
#if BUILDFLAG(CONTENT_ENABLE_LEGACY_IPC)
RenderFrameImpl* GetListener(int32_t routing_id);
#endif
// Map of registered RenderFrames.
absl::flat_hash_map<blink::LocalFrameToken,
raw_ptr<RenderFrameImpl, CtnExperimental>>
listener_map_;
#if BUILDFLAG(CONTENT_ENABLE_LEGACY_IPC)
absl::flat_hash_map<int32_t, raw_ptr<RenderFrameImpl, CtnExperimental>>
routing_id_map_;
#endif
// A dedicated scheduler for this AgentSchedulingGroup.
std::unique_ptr<blink::scheduler::WebAgentGroupScheduler>
agent_group_scheduler_;
// This AgentSchedulingGroup's legacy IPC channel. Will only be used in
// `features::MBIMode::kEnabledPerRenderProcessHost` or
// `features::MBIMode::kEnabledPerSiteInstance` mode.
std::unique_ptr<IPC::SyncChannel> channel_;
const raw_ref<RenderThread> render_thread_;
// Implementation of `mojom::AgentSchedulingGroup`, used for responding to
// calls from the (browser-side) `AgentSchedulingGroupHost`.
mojo::AssociatedReceiver<mojom::AgentSchedulingGroup> receiver_;
// Remote stub of mojom::AgentSchedulingGroupHost, used for sending calls to
// the (browser-side) AgentSchedulingGroupHost.
mojo::AssociatedRemote<mojom::AgentSchedulingGroupHost> host_remote_;
// The `mojom::RouteProvider` mojo receiver that the browser uses to establish
// a `blink::AssociatedInterfaceProvider` route between `this` and a
// `RenderFrameHostImpl`. See documentation above
// `associated_interface_provider_receivers_`.
mojo::AssociatedReceiver<mojom::RouteProvider> route_provider_receiver_{this};
// The `blink::mojom::AssociatedInterfaceProvider` receiver set that *all*
// `RenderFrameHostImpl`s associated with this agent scheduling group own a
// remote to. `this` handles each of their associated interface requests. If
// we have an associated `RenderFrameImpl` that we can forward the request to,
// we do. Otherwise, we "queue" these requests in `pending_receivers_`. This
// is really bad though; see the documentation there.
mojo::AssociatedReceiverSet<blink::mojom::AssociatedInterfaceProvider,
blink::LocalFrameToken>
associated_interface_provider_receivers_;
struct ReceiverData {
ReceiverData(
const std::string& name,
mojo::PendingAssociatedReceiver<blink::mojom::AssociatedInterface>
receiver);
ReceiverData(ReceiverData&& other);
~ReceiverData();
std::string name;
mojo::PendingAssociatedReceiver<blink::mojom::AssociatedInterface> receiver;
};
// See warning in `GetAssociatedInterface`.
// Map from `blink::LocalFrameToken` to pending receivers that have not had
// their route added. Note this is unsafe and can lead to message drops.
std::multimap<blink::LocalFrameToken, ReceiverData> pending_receivers_;
};
} // namespace content
#endif // CONTENT_RENDERER_AGENT_SCHEDULING_GROUP_H_
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