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class JSProxy; class JSObject; // Alias for HeapObject::IsJSProxy() that avoids inlining. V8_EXPORT_PRIVATE bool IsJSProxy_NonInline(HeapObject o); template <class D, class P> class TorqueGeneratedJSProxy : public P { static_assert(std::is_same<JSProxy, D>::value, "Use this class as direct base for JSProxy."); static_assert(std::is_same<JSReceiver, P>::value, "Pass in JSReceiver as second template parameter for TorqueGeneratedJSProxy."); public: using Super = P; using TorqueGeneratedClass = TorqueGeneratedJSProxy<D,P>; // Torque type: (class JSReceiver | Null) inline HeapObject target() const; inline HeapObject target(PtrComprCageBase cage_base) const; inline void set_target(HeapObject value, WriteBarrierMode mode = UPDATE_WRITE_BARRIER); // Torque type: (class JSReceiver | Null) inline HeapObject handler() const; inline HeapObject handler(PtrComprCageBase cage_base) const; inline void set_handler(HeapObject value, WriteBarrierMode mode = UPDATE_WRITE_BARRIER); V8_INLINE static D cast(Object object) { return D(object.ptr()); } V8_INLINE static D unchecked_cast(Object object) { return bit_cast<D>(object); } #ifdef VERIFY_HEAP V8_EXPORT_PRIVATE void JSProxyVerify(Isolate* isolate); #endif // VERIFY_HEAP static constexpr int kStartOfStrongFieldsOffset = P::kHeaderSize; static constexpr int kTargetOffset = P::kHeaderSize; static constexpr int kTargetOffsetEnd = kTargetOffset + kTaggedSize - 1; static constexpr int kHandlerOffset = kTargetOffsetEnd + 1; static constexpr int kHandlerOffsetEnd = kHandlerOffset + kTaggedSize - 1; static constexpr int kEndOfStrongFieldsOffset = kHandlerOffsetEnd + 1; static constexpr int kStartOfWeakFieldsOffset = kHandlerOffsetEnd + 1; static constexpr int kEndOfWeakFieldsOffset = kHandlerOffsetEnd + 1; static constexpr int kHeaderSize = kHandlerOffsetEnd + 1; static constexpr int kSize = kHandlerOffsetEnd + 1; V8_INLINE static constexpr int32_t SizeFor() { DCHECK(kHeaderSize == kSize && kHeaderSize == 32); int32_t size = kHeaderSize; return size; } V8_INLINE int32_t AllocatedSize() const { return SizeFor(); } friend class Factory; public: template <class DAlias = D> constexpr TorqueGeneratedJSProxy() : P() { static_assert(std::is_base_of<TorqueGeneratedJSProxy, DAlias>::value, "class TorqueGeneratedJSProxy should be used as direct base for JSProxy."); } protected: inline explicit TorqueGeneratedJSProxy(Address ptr); // Special-purpose constructor for subclasses that have fast paths where // their ptr() is a Smi. inline explicit TorqueGeneratedJSProxy(Address ptr, HeapObject::AllowInlineSmiStorage allow_smi); };