src/objects/api-callbacks.h

// 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_API_CALLBACKS_H_
#define V8_OBJECTS_API_CALLBACKS_H_

#include "src/objects/struct.h"
#include "torque-generated/bit-fields.h"

// Has to be the last include (doesn't have include guards):
#include "src/objects/object-macros.h"

namespace v8 {
namespace internal {

class StructBodyDescriptor;

#include "torque-generated/src/objects/api-callbacks-tq.inc"

// An accessor must have a getter, but can have no setter.
//
// When setting a property, V8 searches accessors in prototypes.
// If an accessor was found and it does not have a setter,
// the request is ignored.
//
// If the accessor in the prototype has the READ_ONLY property attribute, then
// a new value is added to the derived object when the property is set.
// This shadows the accessor in the prototype.
class AccessorInfo
    : public TorqueGeneratedAccessorInfo<AccessorInfo, HeapObject> {
 public:
  // This is a wrapper around |maybe_redirected_getter| accessor which
  // returns/accepts C function and converts the value from and to redirected
  // pointer.
  DECL_EXTERNAL_POINTER_ACCESSORS_MAYBE_READ_ONLY_HOST(getter, Address)
  inline void init_getter_redirection(IsolateForSandbox isolate);
  inline void remove_getter_redirection(IsolateForSandbox isolate);
  inline bool has_getter(Isolate* isolate);

  // The field contains the address of the C function.
  DECL_EXTERNAL_POINTER_ACCESSORS_MAYBE_READ_ONLY_HOST(setter, Address)
  inline bool has_setter(Isolate* isolate);

  DECL_BOOLEAN_ACCESSORS(is_special_data_property)
  DECL_BOOLEAN_ACCESSORS(replace_on_access)
  DECL_BOOLEAN_ACCESSORS(is_sloppy)

  inline SideEffectType getter_side_effect_type() const;
  inline void set_getter_side_effect_type(SideEffectType type);

  inline SideEffectType setter_side_effect_type() const;
  inline void set_setter_side_effect_type(SideEffectType type);

  // The property attributes used when an API object template is instantiated
  // for the first time. Changing of this value afterwards does not affect
  // the actual attributes of a property.
  inline PropertyAttributes initial_property_attributes() const;
  inline void set_initial_property_attributes(PropertyAttributes attributes);

  // Checks whether the given receiver is compatible with this accessor.
  static bool IsCompatibleReceiverMap(Handle<AccessorInfo> info,
                                      Handle<Map> map);
  inline bool IsCompatibleReceiver(Tagged<Object> receiver);

  // Append all descriptors to the array that are not already there.
  // Return number added.
  static int AppendUnique(Isolate* isolate, Handle<Object> descriptors,
                          Handle<FixedArray> array, int valid_descriptors);

  DECL_PRINTER(AccessorInfo)

  inline void clear_padding();

  class BodyDescriptor;

 private:
  // When simulator is enabled the field stores the "redirected" address of the
  // C function (the one that's callabled from simulated compiled code), in
  // this case the original address of the C function has to be taken from the
  // redirection.
  // For native builds the field contains the address of the C function.
  // This field is initialized implicitly via respective |getter|-related
  // methods.
  DECL_EXTERNAL_POINTER_ACCESSORS(maybe_redirected_getter, Address)

  // Bit positions in |flags|.
  DEFINE_TORQUE_GENERATED_ACCESSOR_INFO_FLAGS()

  TQ_OBJECT_CONSTRUCTORS(AccessorInfo)
};

class AccessCheckInfo
    : public TorqueGeneratedAccessCheckInfo<AccessCheckInfo, Struct> {
 public:
  static Tagged<AccessCheckInfo> Get(Isolate* isolate,
                                     Handle<JSObject> receiver);

  using BodyDescriptor = StructBodyDescriptor;

  TQ_OBJECT_CONSTRUCTORS(AccessCheckInfo)
};

class InterceptorInfo
    : public TorqueGeneratedInterceptorInfo<InterceptorInfo, Struct> {
 public:
  DECL_BOOLEAN_ACCESSORS(can_intercept_symbols)
  DECL_BOOLEAN_ACCESSORS(non_masking)
  DECL_BOOLEAN_ACCESSORS(is_named)
  DECL_BOOLEAN_ACCESSORS(has_no_side_effect)
  // TODO(ishell): remove support for old signatures once they go through
  // Api deprecation process.
  DECL_BOOLEAN_ACCESSORS(has_new_callbacks_signature)

  DEFINE_TORQUE_GENERATED_INTERCEPTOR_INFO_FLAGS()

  using BodyDescriptor = StructBodyDescriptor;

  TQ_OBJECT_CONSTRUCTORS(InterceptorInfo)
};

}  // namespace internal
}  // namespace v8

#include "src/objects/object-macros-undef.h"

#endif  // V8_OBJECTS_API_CALLBACKS_H_