1// Copyright 2019 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef V8_EXECUTION_ISOLATE_UTILS_H_
6#define V8_EXECUTION_ISOLATE_UTILS_H_
7
8#include "src/common/globals.h"
9
10namespace v8 {
11namespace internal {
12
13// Computes the pointer compression cage base from any read only or writable
14// heap object. The resulting value is intended to be used only as a hoisted
15// computation of cage base inside trivial accessors for optimizing value
16// decompression. When pointer compression is disabled this function always
17// returns nullptr.
18V8_INLINE PtrComprCageBase GetPtrComprCageBase(HeapObject object);
19
20V8_INLINE Heap* GetHeapFromWritableObject(HeapObject object);
21
22V8_INLINE Isolate* GetIsolateFromWritableObject(HeapObject object);
23
24// Returns true if it succeeded to obtain isolate from given object.
25// If it fails then the object is definitely a read-only object but it may also
26// succeed for read only objects if pointer compression is enabled.
27V8_INLINE bool GetIsolateFromHeapObject(HeapObject object, Isolate** isolate);
28
29}  // namespace internal
30}  // namespace v8
31
32#endif  // V8_EXECUTION_ISOLATE_UTILS_H_
33