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// Copyright 2019 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_EXECUTION_PROTECTORS_H_
#define V8_EXECUTION_PROTECTORS_H_
#include "src/handles/handles.h"
namespace v8 {
namespace internal {
class Protectors : public AllStatic {
public:
static const int kProtectorValid = 1;
static const int kProtectorInvalid = 0;
#define DECLARED_PROTECTORS_ON_NATIVE_CONTEXT(V) \
V(RegExpSpeciesLookupChainProtector, regexp_species_protector)
#define DECLARED_PROTECTORS_ON_ISOLATE(V) \
V(ArrayBufferDetaching, ArrayBufferDetachingProtector, \
array_buffer_detaching_protector) \
V(ArrayConstructor, ArrayConstructorProtector, array_constructor_protector) \
V(ArrayIteratorLookupChain, ArrayIteratorProtector, \
array_iterator_protector) \
V(ArraySpeciesLookupChain, ArraySpeciesProtector, array_species_protector) \
V(IsConcatSpreadableLookupChain, IsConcatSpreadableProtector, \
is_concat_spreadable_protector) \
V(NoElements, NoElementsProtector, no_elements_protector) \
\
/* The MapIterator protector protects the original iteration behaviors */ \
/* of Map.prototype.keys(), Map.prototype.values(), and */ \
/* Set.prototype.entries(). It does not protect the original iteration */ \
/* behavior of Map.prototype[Symbol.iterator](). */ \
/* The protector is invalidated when: */ \
/* * The 'next' property is set on an object where the property holder */ \
/* is the %MapIteratorPrototype% (e.g. because the object is that very */ \
/* prototype). */ \
/* * The 'Symbol.iterator' property is set on an object where the */ \
/* property holder is the %IteratorPrototype%. Note that this also */ \
/* invalidates the SetIterator protector (see below). */ \
V(MapIteratorLookupChain, MapIteratorProtector, map_iterator_protector) \
V(PromiseHook, PromiseHookProtector, promise_hook_protector) \
V(PromiseThenLookupChain, PromiseThenProtector, promise_then_protector) \
V(PromiseResolveLookupChain, PromiseResolveProtector, \
promise_resolve_protector) \
V(PromiseSpeciesLookupChain, PromiseSpeciesProtector, \
promise_species_protector) \
\
/* The SetIterator protector protects the original iteration behavior of */ \
/* Set.prototype.keys(), Set.prototype.values(), */ \
/* Set.prototype.entries(), and Set.prototype[Symbol.iterator](). The */ \
/* protector is invalidated when: */ \
/* * The 'next' property is set on an object where the property holder */ \
/* is the %SetIteratorPrototype% (e.g. because the object is that very */ \
/* prototype). */ \
/* * The 'Symbol.iterator' property is set on an object where the */ \
/* property holder is the %SetPrototype% OR %IteratorPrototype%. This */ \
/* means that setting Symbol.iterator on a MapIterator object can also */ \
/* invalidate the SetIterator protector, and vice versa, setting */ \
/* Symbol.iterator on a SetIterator object can also invalidate the */ \
/* MapIterator. This is an over-approximation for the sake of */ \
/* simplicity. */ \
V(SetIteratorLookupChain, SetIteratorProtector, set_iterator_protector) \
\
/* The StringIteratorProtector protects the original string iteration */ \
/* behavior for primitive strings. As long as the */ \
/* StringIteratorProtector is valid, iterating over a primitive string */ \
/* is guaranteed to be unobservable from user code and can thus be cut */ \
/* short. More specifically, the protector gets invalidated as soon as */ \
/* either String.prototype[Symbol.iterator] or */ \
/* String.prototype[Symbol.iterator]().next is modified. This guarantee */ \
/* does not apply to string objects (as opposed to primitives), since */ \
/* they could define their own Symbol.iterator. */ \
/* String.prototype itself does not need to be protected, since it is */ \
/* non-configurable and non-writable. */ \
V(StringIteratorLookupChain, StringIteratorProtector, \
string_iterator_protector) \
V(StringLengthOverflowLookupChain, StringLengthProtector, \
string_length_protector) \
V(TypedArraySpeciesLookupChain, TypedArraySpeciesProtector, \
typed_array_species_protector)
#define DECLARE_PROTECTOR_ON_NATIVE_CONTEXT(name, unused_cell) \
V8_EXPORT_PRIVATE static inline bool Is##name##Intact( \
Handle<NativeContext> native_context); \
V8_EXPORT_PRIVATE static void Invalidate##name( \
Isolate* isolate, Handle<NativeContext> native_context);
DECLARED_PROTECTORS_ON_NATIVE_CONTEXT(DECLARE_PROTECTOR_ON_NATIVE_CONTEXT)
#undef DECLARE_PROTECTOR_ON_NATIVE_CONTEXT
#define DECLARE_PROTECTOR_ON_ISOLATE(name, unused_root_index, unused_cell) \
V8_EXPORT_PRIVATE static inline bool Is##name##Intact(Isolate* isolate); \
V8_EXPORT_PRIVATE static void Invalidate##name(Isolate* isolate);
DECLARED_PROTECTORS_ON_ISOLATE(DECLARE_PROTECTOR_ON_ISOLATE)
#undef DECLARE_PROTECTOR_ON_ISOLATE
};
} // namespace internal
} // namespace v8
#endif // V8_EXECUTION_PROTECTORS_H_
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