chromium/v8/src/heap/large-page-metadata.cc

// Copyright 2023 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/large-page-metadata.h"

#include "src/base/sanitizer/msan.h"
#include "src/common/globals.h"
#include "src/heap/memory-chunk-layout.h"
#include "src/heap/mutable-page-metadata.h"
#include "src/heap/remembered-set.h"

namespace v8 {
namespace internal {

class Heap;

// This check is here to ensure that the lower 32 bits of any real heap object
// can't overlap with the lower 32 bits of cleared weak reference value and
// therefore it's enough to compare only the lower 32 bits of a
// Tagged<MaybeObject> in order to figure out if it's a cleared weak reference
// or not.
static_assert …;

LargePageMetadata::LargePageMetadata(Heap* heap, BaseSpace* space,
                                     size_t chunk_size, Address area_start,
                                     Address area_end,
                                     VirtualMemory reservation,
                                     Executability executable)
    : … { … }

MemoryChunk::MainThreadFlags LargePageMetadata::InitialFlags(
    Executability executable) const { … }

void LargePageMetadata::ClearOutOfLiveRangeSlots(Address free_start) { … }

}  // namespace internal
}  // namespace v8