chromium/v8/src/heap/pretenuring-handler.cc

// Copyright 2022 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "src/heap/pretenuring-handler.h"

#include "src/common/globals.h"
#include "src/execution/isolate.h"
#include "src/flags/flags.h"
#include "src/handles/global-handles-inl.h"
#include "src/heap/gc-tracer-inl.h"
#include "src/heap/new-spaces.h"
#include "src/objects/allocation-site-inl.h"

namespace v8 {
namespace internal {

PretenuringHandler::PretenuringHandler(Heap* heap)
    : … { … }

PretenuringHandler::~PretenuringHandler() = default;

namespace {

static constexpr int kMinMementoCount = …;

double GetPretenuringRatioThreshold(size_t new_space_capacity) { … }

inline bool MakePretenureDecision(
    Tagged<AllocationSite> site,
    AllocationSite::PretenureDecision current_decision, double ratio,
    bool new_space_capacity_was_above_pretenuring_threshold,
    size_t new_space_capacity) { … }

// Clear feedback calculation fields until the next gc.
inline void ResetPretenuringFeedback(Tagged<AllocationSite> site) { … }

inline bool DigestPretenuringFeedback(
    Isolate* isolate, Tagged<AllocationSite> site,
    bool new_space_capacity_was_above_pretenuring_threshold,
    size_t new_space_capacity) { … }

bool PretenureAllocationSiteManually(Isolate* isolate,
                                     Tagged<AllocationSite> site) { … }

}  // namespace

// static
int PretenuringHandler::GetMinMementoCountForTesting() { … }

void PretenuringHandler::MergeAllocationSitePretenuringFeedback(
    const PretenuringFeedbackMap& local_pretenuring_feedback) { … }

void PretenuringHandler::RemoveAllocationSitePretenuringFeedback(
    Tagged<AllocationSite> site) { … }

void PretenuringHandler::ProcessPretenuringFeedback(
    size_t new_space_capacity_before_gc) { … }

void PretenuringHandler::PretenureAllocationSiteOnNextCollection(
    Tagged<AllocationSite> site) { … }

void PretenuringHandler::reset() { … }

}  // namespace internal
}  // namespace v8