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// Copyright 2019 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/renderer/browser_exposed_renderer_interfaces.h"
#include <stdint.h>
#include <memory>
#include <utility>
#include "base/feature_list.h"
#include "base/functional/bind.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/task/single_thread_task_runner.h"
#include "base/task/task_runner.h"
#include "base/task/thread_pool.h"
#include "base/time/time.h"
#include "base/trace_event/trace_event.h"
#include "build/build_config.h"
#include "content/common/features.h"
#include "content/common/frame.mojom.h"
#include "content/public/common/content_client.h"
#include "content/public/common/resource_usage_reporter.mojom.h"
#include "content/public/common/resource_usage_reporter_type_converters.h"
#include "content/public/renderer/content_renderer_client.h"
#include "content/renderer/render_thread_impl.h"
#include "content/renderer/service_worker/embedded_worker_instance_client_impl.h"
#include "content/renderer/worker/shared_worker_factory_impl.h"
#include "content/services/auction_worklet/auction_worklet_service_impl.h"
#include "mojo/public/cpp/bindings/binder_map.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/self_owned_receiver.h"
#include "v8/include/v8-isolate.h"
#include "v8/include/v8-statistics.h"
namespace content {
namespace {
constexpr int kWaitForWorkersStatsTimeoutMS = 20;
class ResourceUsageReporterImpl : public content::mojom::ResourceUsageReporter {
public:
explicit ResourceUsageReporterImpl(base::WeakPtr<RenderThread> thread)
: thread_(std::move(thread)) {}
ResourceUsageReporterImpl(const ResourceUsageReporterImpl&) = delete;
~ResourceUsageReporterImpl() override = default;
ResourceUsageReporterImpl& operator=(const ResourceUsageReporterImpl&) =
delete;
private:
static void CollectOnWorkerThread(
const scoped_refptr<base::TaskRunner>& master,
base::WeakPtr<ResourceUsageReporterImpl> impl) {
size_t total_bytes = 0;
size_t used_bytes = 0;
v8::Isolate* isolate = v8::Isolate::GetCurrent();
if (isolate) {
v8::HeapStatistics heap_stats;
isolate->GetHeapStatistics(&heap_stats);
total_bytes = heap_stats.total_heap_size();
used_bytes = heap_stats.used_heap_size();
}
master->PostTask(FROM_HERE,
base::BindOnce(&ResourceUsageReporterImpl::ReceiveStats,
impl, total_bytes, used_bytes));
}
void ReceiveStats(size_t total_bytes, size_t used_bytes) {
usage_data_->v8_bytes_allocated += total_bytes;
usage_data_->v8_bytes_used += used_bytes;
workers_to_go_--;
if (!workers_to_go_)
SendResults();
}
void SendResults() {
if (!callback_.is_null())
std::move(callback_).Run(std::move(usage_data_));
callback_.Reset();
weak_factory_.InvalidateWeakPtrs();
workers_to_go_ = 0;
}
void GetUsageData(GetUsageDataCallback callback) override {
DCHECK(callback_.is_null());
weak_factory_.InvalidateWeakPtrs();
usage_data_ = mojom::ResourceUsageData::New();
usage_data_->reports_v8_stats = true;
callback_ = std::move(callback);
// Since it is not safe to call any Blink or V8 functions until Blink has
// been initialized (which also initializes V8), early out and send 0 back
// for all resources.
if (!thread_) {
SendResults();
return;
}
blink::WebCacheResourceTypeStats stats;
blink::WebCache::GetResourceTypeStats(&stats);
usage_data_->web_cache_stats = mojom::ResourceTypeStats::From(stats);
v8::Isolate* isolate = v8::Isolate::GetCurrent();
if (isolate) {
v8::HeapStatistics heap_stats;
isolate->GetHeapStatistics(&heap_stats);
usage_data_->v8_bytes_allocated = heap_stats.total_heap_size();
usage_data_->v8_bytes_used = heap_stats.used_heap_size();
}
base::RepeatingClosure collect =
base::BindRepeating(&ResourceUsageReporterImpl::CollectOnWorkerThread,
base::SingleThreadTaskRunner::GetCurrentDefault(),
weak_factory_.GetWeakPtr());
workers_to_go_ =
RenderThread::Get()->PostTaskToAllWebWorkers(std::move(collect));
if (workers_to_go_) {
// The guard task to send out partial stats
// in case some workers are not responsive.
base::SingleThreadTaskRunner::GetCurrentDefault()->PostDelayedTask(
FROM_HERE,
base::BindOnce(&ResourceUsageReporterImpl::SendResults,
weak_factory_.GetWeakPtr()),
base::Milliseconds(kWaitForWorkersStatsTimeoutMS));
} else {
// No worker threads so just send out the main thread data right away.
SendResults();
}
}
const base::WeakPtr<RenderThread> thread_;
mojom::ResourceUsageDataPtr usage_data_;
GetUsageDataCallback callback_;
int workers_to_go_ = 0;
base::WeakPtrFactory<ResourceUsageReporterImpl> weak_factory_{this};
};
void CreateResourceUsageReporter(
base::WeakPtr<RenderThreadImpl> render_thread,
mojo::PendingReceiver<mojom::ResourceUsageReporter> receiver) {
mojo::MakeSelfOwnedReceiver(
std::make_unique<ResourceUsageReporterImpl>(std::move(render_thread)),
std::move(receiver));
}
void CreateEmbeddedWorkerWithRenderMainThread(
scoped_refptr<base::SingleThreadTaskRunner> initiator_task_runner,
base::WeakPtr<RenderThreadImpl> render_thread,
mojo::PendingReceiver<blink::mojom::EmbeddedWorkerInstanceClient>
receiver) {
TRACE_EVENT0("ServiceWorker", "CreateEmbeddedWorkerWithRenderMainThread");
initiator_task_runner->PostTask(
FROM_HERE, base::BindOnce(&EmbeddedWorkerInstanceClientImpl::Create,
initiator_task_runner,
render_thread->cors_exempt_header_list(),
std::move(receiver)));
}
void CreateEmbeddedWorker(
scoped_refptr<base::SingleThreadTaskRunner> initiator_task_runner,
mojo::PendingReceiver<blink::mojom::EmbeddedWorkerInstanceClient>
receiver) {
TRACE_EVENT0("ServiceWorker", "CreateEmbeddedWorker");
// An empty fake list is passed to
// `EmbeddedWorkerInstanceClientImpl::Create()`. That will be overridden by
// the actual cors exempt header list in
// `EmbeddedWorkerInstanceClientImpl::StartWorker()`.
//
// TODO(crbug.com/40753993): Remove this fake empty list once we confirmed
// this approach is fine.
const std::vector<std::string> fake_cors_exempt_header_list;
initiator_task_runner->PostTask(
FROM_HERE,
base::BindOnce(&EmbeddedWorkerInstanceClientImpl::Create,
initiator_task_runner, fake_cors_exempt_header_list,
std::move(receiver)));
}
} // namespace
void ExposeRendererInterfacesToBrowser(
base::WeakPtr<RenderThreadImpl> render_thread,
mojo::BinderMap* binders) {
DCHECK(render_thread);
binders->Add<blink::mojom::SharedWorkerFactory>(
base::BindRepeating(&SharedWorkerFactoryImpl::Create),
base::SingleThreadTaskRunner::GetCurrentDefault());
binders->Add<mojom::ResourceUsageReporter>(
base::BindRepeating(&CreateResourceUsageReporter, render_thread),
base::SingleThreadTaskRunner::GetCurrentDefault());
#if BUILDFLAG(IS_ANDROID)
binders->Add<auction_worklet::mojom::AuctionWorkletService>(
base::BindRepeating(
&auction_worklet::AuctionWorkletServiceImpl::CreateForRenderer),
base::SingleThreadTaskRunner::GetCurrentDefault());
#endif
auto task_runner_for_service_worker_startup =
base::ThreadPool::CreateSingleThreadTaskRunner(
{base::MayBlock(), base::TaskPriority::USER_BLOCKING,
base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN});
// TODO(crbug.com/40753993): Remove the feature flag and
// `CreateEmbeddedWorkerWithRenderMainThread()` once we confirmed this
// approach is fine.
//
// The kServiceWorkerAvoidMainThreadForInitialization feature flag is the
// experimental flag to avoid the additional thread hop over the main thread
// for the ServiceWorker initialization. Currently it's on the main thread as
// CreateEmbeddedWorker accesses `cors_exempt_header_list` from
// `render_thread`. When this feature flag is enabled, binds on
// `task_runner_for_service_worker_startup` instead of the main thread, so
// startup isn't blocked on the main thread.
if (base::FeatureList::IsEnabled(
features::kServiceWorkerAvoidMainThreadForInitialization)) {
binders->Add<blink::mojom::EmbeddedWorkerInstanceClient>(
base::BindRepeating(&CreateEmbeddedWorker,
task_runner_for_service_worker_startup),
task_runner_for_service_worker_startup);
} else {
binders->Add<blink::mojom::EmbeddedWorkerInstanceClient>(
base::BindRepeating(&CreateEmbeddedWorkerWithRenderMainThread,
task_runner_for_service_worker_startup,
render_thread),
base::SingleThreadTaskRunner::GetCurrentDefault());
}
GetContentClient()->renderer()->ExposeInterfacesToBrowser(binders);
}
} // namespace content
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