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Implement WeakRef Object (#4546)

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Related test262 test-cases has been removed from skip list.
Execpt two test-case since they need other feature to work (Finalization registry and async GC)

JerryScript-DCO-1.0-Signed-off-by: Bence Gabor Kis kisbg@inf.u-szeged.hu
This commit is contained in:
kisbg
2021-03-01 12:46:54 +00:00
committed by GitHub
parent 9556701742
commit 129ca4946c
24 changed files with 500 additions and 108 deletions
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jerry-core/ecma/operations/ecma-objects.c
+79
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@@ -2650,6 +2650,9 @@ ecma_object_check_class_name_is_object (ecma_object_t *obj_p) /**< object */
#if JERRY_BUILTIN_WEAKMAP
|| ecma_builtin_is (obj_p, ECMA_BUILTIN_ID_WEAKMAP_PROTOTYPE)
#endif /* JERRY_BUILTIN_WEAKMAP */
#if JERRY_BUILTIN_WEAKREF
|| ecma_builtin_is (obj_p, ECMA_BUILTIN_ID_WEAKREF_PROTOTYPE)
#endif /* JERRY_BUILTIN_WEAKREF */
#if JERRY_BUILTIN_WEAKSET
|| ecma_builtin_is (obj_p, ECMA_BUILTIN_ID_WEAKSET_PROTOTYPE)
#endif /* JERRY_BUILTIN_WEAKSET */
@@ -3239,6 +3242,82 @@ ecma_op_ordinary_object_has_own_property (ecma_object_t *object_p, /**< the obje
return property != ECMA_PROPERTY_TYPE_NOT_FOUND && property != ECMA_PROPERTY_TYPE_NOT_FOUND_AND_STOP;
} /* ecma_op_ordinary_object_has_own_property */
#if JERRY_BUILTIN_WEAKREF || JERRY_BUILTIN_WEAKSET || JERRY_BUILTIN_WEAKMAP
/**
* Set a weak reference from a container or WeakRefObject to a key object
*/
void
ecma_op_object_set_weak (ecma_object_t *object_p, /**< key object */
ecma_object_t *target_p) /**< target object */
{
if (JERRY_UNLIKELY (ecma_op_object_is_fast_array (object_p)))
{
ecma_fast_array_convert_to_normal (object_p);
}
ecma_string_t *weak_refs_string_p = ecma_get_internal_string (LIT_INTERNAL_MAGIC_STRING_WEAK_REFS);
ecma_property_t *property_p = ecma_find_named_property (object_p, weak_refs_string_p);
ecma_collection_t *refs_p;
if (property_p == NULL)
{
ecma_property_value_t *value_p;
ECMA_CREATE_INTERNAL_PROPERTY (object_p, weak_refs_string_p, property_p, value_p);
refs_p = ecma_new_collection ();
ECMA_SET_INTERNAL_VALUE_POINTER (value_p->value, refs_p);
}
else
{
refs_p = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_collection_t, (ECMA_PROPERTY_VALUE_PTR (property_p)->value));
}
const ecma_value_t target_value = ecma_make_object_value ((ecma_object_t *) target_p);
for (uint32_t i = 0; i < refs_p->item_count; i++)
{
if (ecma_is_value_empty (refs_p->buffer_p[i]))
{
refs_p->buffer_p[i] = target_value;
return;
}
}
ecma_collection_push_back (refs_p, target_value);
} /* ecma_op_object_set_weak */
/**
* Helper function to remove a weak reference to an object.
*
* @return ecma value
* Returned value must be freed with ecma_free_value.
*/
void
ecma_op_object_unref_weak (ecma_object_t *object_p, /**< this argument */
ecma_value_t ref_holder) /**< key argument */
{
ecma_string_t *weak_refs_string_p = ecma_get_internal_string (LIT_INTERNAL_MAGIC_STRING_WEAK_REFS);
ecma_property_t *property_p = ecma_find_named_property (object_p, weak_refs_string_p);
JERRY_ASSERT (property_p != NULL);
ecma_collection_t *refs_p = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_collection_t,
ECMA_PROPERTY_VALUE_PTR (property_p)->value);
ecma_value_t *buffer_p = refs_p->buffer_p;
while (true)
{
if (*buffer_p == ref_holder)
{
*buffer_p = ECMA_VALUE_EMPTY;
return;
}
JERRY_ASSERT (buffer_p < refs_p->buffer_p + refs_p->item_count);
buffer_p++;
}
} /* ecma_op_object_unref_weak */
#endif /* JERRY_BUILTIN_WEAKREF || JERRY_BUILTIN_WEAKSET || JERRY_BUILTIN_WEAKMAP */
/**
* Raise property redefinition error
*