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embedder-data-array.h
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68 lines (50 loc) · 2.09 KB
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// Copyright 2018 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.
#ifndef V8_OBJECTS_EMBEDDER_DATA_ARRAY_H_
#define V8_OBJECTS_EMBEDDER_DATA_ARRAY_H_
#include "src/common/globals.h"
#include "src/handles/maybe-handles.h"
#include "src/objects/heap-object.h"
#include "torque-generated/class-definitions-tq.h"
// Has to be the last include (doesn't have include guards):
#include "src/objects/object-macros.h"
namespace v8 {
namespace internal {
// This is a storage array for embedder data fields stored in native context.
// It's basically an "array of EmbedderDataSlots".
// Note, if the pointer compression is enabled the embedder data slot also
// contains a raw data part in addition to tagged part.
class EmbedderDataArray
: public TorqueGeneratedEmbedderDataArray<EmbedderDataArray, HeapObject> {
public:
// TODO(v8:8989): [torque] Support marker constants.
static const int kHeaderSize = kSize;
// Garbage collection support.
static constexpr int SizeFor(int length) {
return kHeaderSize + length * kEmbedderDataSlotSize;
}
// Returns a grown copy if the index is bigger than the array's length.
static Handle<EmbedderDataArray> EnsureCapacity(
Isolate* isolate, Handle<EmbedderDataArray> array, int index);
// Code Generation support.
static constexpr int OffsetOfElementAt(int index) { return SizeFor(index); }
// Address of the first slot.
V8_INLINE Address slots_start();
// Address of the one past last slot.
V8_INLINE Address slots_end();
// Dispatched behavior.
DECL_PRINTER(EmbedderDataArray)
DECL_VERIFIER(EmbedderDataArray)
class BodyDescriptor;
static const int kMaxSize = kMaxRegularHeapObjectSize;
static constexpr int kMaxLength =
(kMaxSize - kHeaderSize) / kEmbedderDataSlotSize;
private:
STATIC_ASSERT(kHeaderSize == Internals::kFixedArrayHeaderSize);
TQ_OBJECT_CONSTRUCTORS(EmbedderDataArray)
};
} // namespace internal
} // namespace v8
#include "src/objects/object-macros-undef.h"
#endif // V8_OBJECTS_EMBEDDER_DATA_ARRAY_H_