| // 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_MAYBE_OBJECT_H_ |
| #define V8_OBJECTS_MAYBE_OBJECT_H_ |
| |
| #include "src/objects/tagged.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // Cleared weak value with unset upper part, i.e. which does not belong to |
| // any particular pointer compression cage. |
| static constexpr Tagged<ClearedWeakValue> kClearedWeakValue = |
| Tagged<ClearedWeakValue>(kClearedWeakHeapObjectLower32); |
| |
| // Returns cleared weak value belonging to main or trusted pointer compression |
| // cage. This is useful for ensuring that a cleared value does not accidentally |
| // leak into another pointer compression cage. |
| inline Tagged<ClearedWeakValue> ClearedValue(); |
| inline Tagged<ClearedWeakValue> ClearedTrustedValue(); |
| |
| template <typename THeapObjectSlot> |
| inline void UpdateHeapObjectReferenceSlot(THeapObjectSlot slot, |
| Tagged<HeapObject> value); |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_OBJECTS_MAYBE_OBJECT_H_ |
