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// 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.h"
// Has to be the last include (doesn't have include guards):
#include "src/objects/object-macros.h"
namespace v8 {
namespace internal {
// 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 Struct {
public:
DECL_ACCESSORS(name, Name)
DECL_INT_ACCESSORS(flags)
DECL_ACCESSORS(expected_receiver_type, Object)
// This directly points at a foreign C function to be used from the runtime.
DECL_ACCESSORS(getter, Object)
inline bool has_getter();
DECL_ACCESSORS(setter, Object)
inline bool has_setter();
// This either points at the same as above, or a trampoline in case we are
// running with the simulator. Use these entries from generated code.
DECL_ACCESSORS(js_getter, Object)
DECL_ACCESSORS(data, Object)
static Address redirect(Address address, AccessorComponent component);
Address redirected_getter() const;
// Dispatched behavior.
DECL_PRINTER(AccessorInfo)
DECL_BOOLEAN_ACCESSORS(all_can_read)
DECL_BOOLEAN_ACCESSORS(all_can_write)
DECL_BOOLEAN_ACCESSORS(is_special_data_property)
DECL_BOOLEAN_ACCESSORS(replace_on_access)
DECL_BOOLEAN_ACCESSORS(is_sloppy)
DECL_BOOLEAN_ACCESSORS(has_no_side_effect)
// 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(Object* receiver);
DECL_CAST(AccessorInfo)
// Dispatched behavior.
DECL_VERIFIER(AccessorInfo)
// 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);
// Layout description.
#define ACCESSOR_INFO_FIELDS(V) \
V(kNameOffset, kPointerSize) \
V(kFlagsOffset, kPointerSize) \
V(kExpectedReceiverTypeOffset, kPointerSize) \
V(kSetterOffset, kPointerSize) \
V(kGetterOffset, kPointerSize) \
V(kJsGetterOffset, kPointerSize) \
V(kDataOffset, kPointerSize) \
V(kSize, 0)
DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize, ACCESSOR_INFO_FIELDS)
#undef ACCESSOR_INFO_FIELDS
private:
inline bool HasExpectedReceiverType();
// Bit positions in |flags|.
#define ACCESSOR_INFO_FLAGS_BIT_FIELDS(V, _) \
V(AllCanReadBit, bool, 1, _) \
V(AllCanWriteBit, bool, 1, _) \
V(IsSpecialDataPropertyBit, bool, 1, _) \
V(IsSloppyBit, bool, 1, _) \
V(ReplaceOnAccessBit, bool, 1, _) \
V(HasNoSideEffectBit, bool, 1, _) \
V(InitialAttributesBits, PropertyAttributes, 3, _)
DEFINE_BIT_FIELDS(ACCESSOR_INFO_FLAGS_BIT_FIELDS)
#undef ACCESSOR_INFO_FLAGS_BIT_FIELDS
DISALLOW_IMPLICIT_CONSTRUCTORS(AccessorInfo);
};
class AccessCheckInfo : public Struct {
public:
DECL_ACCESSORS(callback, Object)
DECL_ACCESSORS(named_interceptor, Object)
DECL_ACCESSORS(indexed_interceptor, Object)
DECL_ACCESSORS(data, Object)
DECL_CAST(AccessCheckInfo)
// Dispatched behavior.
DECL_PRINTER(AccessCheckInfo)
DECL_VERIFIER(AccessCheckInfo)
static AccessCheckInfo* Get(Isolate* isolate, Handle<JSObject> receiver);
static const int kCallbackOffset = HeapObject::kHeaderSize;
static const int kNamedInterceptorOffset = kCallbackOffset + kPointerSize;
static const int kIndexedInterceptorOffset =
kNamedInterceptorOffset + kPointerSize;
static const int kDataOffset = kIndexedInterceptorOffset + kPointerSize;
static const int kSize = kDataOffset + kPointerSize;
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(AccessCheckInfo);
};
class InterceptorInfo : public Struct {
public:
DECL_ACCESSORS(getter, Object)
DECL_ACCESSORS(setter, Object)
DECL_ACCESSORS(query, Object)
DECL_ACCESSORS(descriptor, Object)
DECL_ACCESSORS(deleter, Object)
DECL_ACCESSORS(enumerator, Object)
DECL_ACCESSORS(definer, Object)
DECL_ACCESSORS(data, Object)
DECL_BOOLEAN_ACCESSORS(can_intercept_symbols)
DECL_BOOLEAN_ACCESSORS(all_can_read)
DECL_BOOLEAN_ACCESSORS(non_masking)
DECL_BOOLEAN_ACCESSORS(is_named)
DECL_BOOLEAN_ACCESSORS(has_no_side_effect)
inline int flags() const;
inline void set_flags(int flags);
DECL_CAST(InterceptorInfo)
// Dispatched behavior.
DECL_PRINTER(InterceptorInfo)
DECL_VERIFIER(InterceptorInfo)
static const int kGetterOffset = HeapObject::kHeaderSize;
static const int kSetterOffset = kGetterOffset + kPointerSize;
static const int kQueryOffset = kSetterOffset + kPointerSize;
static const int kDescriptorOffset = kQueryOffset + kPointerSize;
static const int kDeleterOffset = kDescriptorOffset + kPointerSize;
static const int kEnumeratorOffset = kDeleterOffset + kPointerSize;
static const int kDefinerOffset = kEnumeratorOffset + kPointerSize;
static const int kDataOffset = kDefinerOffset + kPointerSize;
static const int kFlagsOffset = kDataOffset + kPointerSize;
static const int kSize = kFlagsOffset + kPointerSize;
static const int kCanInterceptSymbolsBit = 0;
static const int kAllCanReadBit = 1;
static const int kNonMasking = 2;
static const int kNamed = 3;
static const int kHasNoSideEffect = 4;
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(InterceptorInfo);
};
class CallHandlerInfo : public Tuple3 {
public:
DECL_ACCESSORS(callback, Object)
DECL_ACCESSORS(js_callback, Object)
DECL_ACCESSORS(data, Object)
DECL_CAST(CallHandlerInfo)
inline bool IsSideEffectFreeCallHandlerInfo() const;
inline bool IsSideEffectCallHandlerInfo() const;
inline void SetNextCallHasNoSideEffect();
// Returns whether or not the next call can be side effect free.
// Calling this will change the state back to having a side effect.
inline bool NextCallHasNoSideEffect();
// Dispatched behavior.
DECL_PRINTER(CallHandlerInfo)
DECL_VERIFIER(CallHandlerInfo)
Address redirected_callback() const;
static const int kCallbackOffset = kValue1Offset;
static const int kJsCallbackOffset = kValue2Offset;
static const int kDataOffset = kValue3Offset;
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(CallHandlerInfo);
};
} // namespace internal
} // namespace v8
#include "src/objects/object-macros-undef.h"
#endif // V8_OBJECTS_API_CALLBACKS_H_
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