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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_ANDROID_OOM_INTERVENTION_OOM_INTERVENTION_TAB_HELPER_H_
#define CHROME_BROWSER_ANDROID_OOM_INTERVENTION_OOM_INTERVENTION_TAB_HELPER_H_
#include <optional>
#include "base/memory/raw_ptr.h"
#include "base/memory/unsafe_shared_memory_region.h"
#include "base/memory/weak_ptr.h"
#include "base/scoped_observation.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "chrome/browser/android/oom_intervention/near_oom_reduction_message_delegate.h"
#include "chrome/browser/ui/interventions/intervention_delegate.h"
#include "components/crash/content/browser/crash_metrics_reporter_android.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/browser/web_contents_user_data.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "services/service_manager/public/cpp/interface_provider.h"
#include "third_party/blink/public/mojom/oom_intervention/oom_intervention.mojom.h"
namespace content {
class WebContents;
}
class OomInterventionDecider;
// A tab helper for near-OOM intervention.
class OomInterventionTabHelper
: public content::WebContentsObserver,
public content::WebContentsUserData<OomInterventionTabHelper>,
public crash_reporter::CrashMetricsReporter::Observer,
public blink::mojom::OomInterventionHost,
public InterventionDelegate {
public:
static bool IsEnabled();
~OomInterventionTabHelper() override;
// blink::mojom::OomInterventionHost:
void OnHighMemoryUsage() override;
// InterventionDelegate:
void AcceptIntervention() override;
void DeclineIntervention() override;
void DeclineInterventionWithReload() override;
void DeclineInterventionSticky() override;
private:
explicit OomInterventionTabHelper(content::WebContents* web_contents);
friend class content::WebContentsUserData<OomInterventionTabHelper>;
// content::WebContentsObserver:
void WebContentsDestroyed() override;
void PrimaryMainFrameRenderProcessGone(
base::TerminationStatus status) override;
void DidStartNavigation(
content::NavigationHandle* navigation_handle) override;
void PrimaryPageChanged(content::Page& page) override;
void OnVisibilityChanged(content::Visibility visibility) override;
void DocumentOnLoadCompletedInPrimaryMainFrame() override;
// CrashDumpManager::Observer:
void OnCrashDumpProcessed(
int rph_id,
const crash_reporter::CrashMetricsReporter::ReportedCrashTypeSet&
reported_counts) override;
// Starts observing near-OOM situation if it's not started.
void StartMonitoringIfNeeded();
// Stops observing near-OOM situation.
void StopMonitoring();
// Starts detecting near-OOM situation in renderer.
void StartDetectionInRenderer();
void ResetInterventionState();
void ResetInterfaces();
bool navigation_started_ = false;
std::optional<base::TimeTicks> near_oom_detected_time_;
base::CallbackListSubscription subscription_;
base::OneShotTimer renderer_detection_timer_;
// Not owned. This will be nullptr in incognito mode.
raw_ptr<OomInterventionDecider> decider_;
mojo::Remote<blink::mojom::OomIntervention> intervention_;
enum class InterventionState {
// Intervention isn't triggered yet.
NOT_TRIGGERED,
// Intervention is triggered but the user doesn't respond yet.
UI_SHOWN,
// Intervention is triggered and the user declined it.
DECLINED,
// Intervention is triggered and the user accepted it.
ACCEPTED,
};
InterventionState intervention_state_ = InterventionState::NOT_TRIGGERED;
mojo::Receiver<blink::mojom::OomInterventionHost> receiver_{this};
// The shared memory region that stores metrics written by the renderer
// process. The memory is updated frequently and the browser should touch the
// memory only after renderer process is dead.
base::UnsafeSharedMemoryRegion shared_metrics_buffer_;
base::WritableSharedMemoryMapping metrics_mapping_;
base::ScopedObservation<crash_reporter::CrashMetricsReporter,
crash_reporter::CrashMetricsReporter::Observer>
scoped_observation_{this};
oom_intervention::NearOomReductionMessageDelegate
near_oom_reduction_message_delegate_;
base::WeakPtrFactory<OomInterventionTabHelper> weak_ptr_factory_{this};
WEB_CONTENTS_USER_DATA_KEY_DECL();
};
#endif // CHROME_BROWSER_ANDROID_OOM_INTERVENTION_OOM_INTERVENTION_TAB_HELPER_H_
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