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// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_CONTROLLER_BLOATED_RENDERER_DETECTOR_H_
#define THIRD_PARTY_BLINK_RENDERER_CONTROLLER_BLOATED_RENDERER_DETECTOR_H_
#include "base/gtest_prod_util.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_initializer.h"
#include "third_party/blink/renderer/controller/controller_export.h"
#include "third_party/blink/renderer/platform/wtf/allocator.h"
#include "third_party/blink/renderer/platform/wtf/time.h"
namespace blink {
// Singleton class for detecting and handling bloated renderer conditions.
// Different parts of the renderer call the corresponding methods of this
// class to notify about potential bloat conditions. It currently works only
// for V8. In future it will be extended to the whole renderer.
class CONTROLLER_EXPORT BloatedRendererDetector {
USING_FAST_MALLOC(BloatedRendererDetector);
public:
// Sets up the global singleton instance.
static void Initialize();
// Called when the main V8 isolate is close to reach its heap limit.
static NearV8HeapLimitHandling OnNearV8HeapLimitOnMainThread();
private:
friend class BloatedRendererDetectorTest;
FRIEND_TEST_ALL_PREFIXES(BloatedRendererDetectorTest, CooldownTime);
FRIEND_TEST_ALL_PREFIXES(BloatedRendererDetectorTest, ForwardToBrowser);
FRIEND_TEST_ALL_PREFIXES(BloatedRendererDetectorTest, MultipleDetections);
// The time which should pass between 2 successive detections of bloated
// renderer.
static const int kMinimumCooldownInMinutes = 10;
explicit BloatedRendererDetector(WTF::TimeTicks time)
: last_detection_time_(time) {}
NearV8HeapLimitHandling OnNearV8HeapLimitOnMainThreadImpl();
WTF::TimeTicks last_detection_time_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CONTROLLER_BLOATED_RENDERER_DETECTOR_H_
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