// Copyright 2020 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_COMMON_EXTERNAL_POINTER_H_ #define V8_COMMON_EXTERNAL_POINTER_H_ #include "src/common/globals.h" namespace v8 { namespace internal { // Convert external pointer from on-V8-heap representation to an actual external // pointer value. V8_INLINE Address DecodeExternalPointer(const Isolate* isolate, ExternalPointer_t encoded_pointer, ExternalPointerTag tag); constexpr ExternalPointer_t kNullExternalPointer = 0; // Creates uninitialized entry in external pointer table and writes the entry id // to the field. // When sandbox is not enabled, it's a no-op. V8_INLINE void InitExternalPointerField(Address field_address, Isolate* isolate); // Creates and initializes entry in external pointer table and writes the entry // id to the field. // Basically, it's InitExternalPointerField() followed by // WriteExternalPointerField(). V8_INLINE void InitExternalPointerField(Address field_address, Isolate* isolate, Address value, ExternalPointerTag tag); // Reads external pointer for the field, and decodes it if the sandbox is // enabled. V8_INLINE Address ReadExternalPointerField(Address field_address, const Isolate* isolate, ExternalPointerTag tag); // Encodes value if the sandbox is enabled and writes it into the field. V8_INLINE void WriteExternalPointerField(Address field_address, Isolate* isolate, Address value, ExternalPointerTag tag); } // namespace internal } // namespace v8 #endif // V8_COMMON_EXTERNAL_POINTER_H_