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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.
#ifndef COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_MEMORY_TRACKER_H_
#define COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_MEMORY_TRACKER_H_
#include "base/byte_count.h"
#include "base/containers/flat_map.h"
#include "base/feature_list.h"
#include "components/keyed_service/core/keyed_service.h"
#include "components/page_load_metrics/browser/metrics_web_contents_observer.h"
#include "components/performance_manager/public/v8_memory/v8_detailed_memory.h"
#include "content/public/browser/render_frame_host.h"
namespace performance_manager {
class ProcessNode;
}
namespace page_load_metrics {
// PageLoadMetricsMemoryTracker tracks per-frame memory usage by V8 and
// forwards an individual per-frame measurement to the
// MetricsWebContentsObserver associated with the WebContents containing that
// frame.
class PageLoadMetricsMemoryTracker
: public KeyedService,
public performance_manager::v8_memory::V8DetailedMemoryObserver {
public:
PageLoadMetricsMemoryTracker();
~PageLoadMetricsMemoryTracker() override;
PageLoadMetricsMemoryTracker(const PageLoadMetricsMemoryTracker&) = delete;
PageLoadMetricsMemoryTracker& operator=(const PageLoadMetricsMemoryTracker&) =
delete;
// KeyedService:
void Shutdown() override;
// performance_manager::v8_memory::V8DetailedMemoryObserver:
void OnV8MemoryMeasurementAvailable(
const performance_manager::ProcessNode* process_node,
const performance_manager::v8_memory::V8DetailedMemoryProcessData*
process_data) override;
// Removes the entry for a deleted frame from `per_frame_memory_usage_map_`.
void OnRenderFrameDeleted(content::RenderFrameHost* render_frame_host,
MetricsWebContentsObserver* observer);
private:
base::ByteCount UpdateMemoryUsageAndGetDelta(
content::RenderFrameHost* render_frame_host,
base::ByteCount current_bytes_used);
// Tracks the most recent per-frame measurements by frame routing id.
base::flat_map<int, base::ByteCount> per_frame_memory_usage_map_;
// Allows receipt of per-frame V8 memory measurements once instantiated
// and PageLoadMetricsMemoryTracker is added as an observer.
std::unique_ptr<performance_manager::v8_memory::V8DetailedMemoryRequest>
memory_request_;
};
} // namespace page_load_metrics
#endif // COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_MEMORY_TRACKER_H_
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