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jerryscript/jerry-core/ecma/operations/ecma-proxy-object.c
Zoltan Herczeg a95e3e37e1
Add more skip check options for Proxy objects (#4614) 
Reorganize the flags to follow the list in ES2020 section 9.5

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
2021-03-03 17:12:36 +01:00

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/* Copyright JS Foundation and other contributors, http://js.foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "ecma-alloc.h"
#include "ecma-array-object.h"
#include "ecma-builtins.h"
#include "ecma-builtin-handlers.h"
#include "ecma-builtin-object.h"
#include "ecma-exceptions.h"
#include "ecma-function-object.h"
#include "ecma-gc.h"
#include "ecma-globals.h"
#include "ecma-helpers.h"
#include "ecma-objects.h"
#include "ecma-objects-general.h"
#include "ecma-proxy-object.h"
#include "jcontext.h"
/** \addtogroup ecma ECMA
* @{
*
* \addtogroup ecmaproxyobject ECMA Proxy object related routines
* @{
*/
#if JERRY_BUILTIN_PROXY
/**
* ProxyCreate operation for create a new proxy object
*
* See also:
* ES2015 9.5.15
* ES11+: 9.5.14 ProxyCreate
*
* @return created Proxy object as an ecma-value - if success
* raised error - otherwise
*/
ecma_object_t *
ecma_proxy_create (ecma_value_t target, /**< proxy target */
ecma_value_t handler, /**< proxy handler */
uint32_t options) /**< ecma_proxy_flag_types_t option bits */
{
/* ES2015: 1, 3. */
/* ES11+: 1 - 2. */
if (!ecma_is_value_object (target) || !ecma_is_value_object (handler))
{
ecma_raise_type_error (ECMA_ERR_MSG ("Cannot create Proxy with a non-object target or handler"));
return NULL;
}
/* ES2015: 5 - 6. */
/* ES11+: 3 - 4. */
/* A Proxy does not have [[Prototype]] value as per standard */
ecma_object_t *obj_p = ecma_create_object (NULL, sizeof (ecma_proxy_object_t), ECMA_OBJECT_TYPE_PROXY);
ecma_proxy_object_t *proxy_obj_p = (ecma_proxy_object_t *) obj_p;
obj_p->u2.prototype_cp = (jmem_cpointer_t) options;
/* ES2015: 7. */
/* ES11+: 5. */
if (ecma_op_is_callable (target))
{
obj_p->u2.prototype_cp |= ECMA_PROXY_IS_CALLABLE;
/* ES2015: 7.b. */
/* ES11+: 5.b. */
if (ecma_is_constructor (target))
{
obj_p->u2.prototype_cp |= ECMA_PROXY_IS_CONSTRUCTABLE;
}
}
/* ES2015: 8. */
/* ES11+: 6. */
proxy_obj_p->target = target;
/* ES2015: 9. */
/* ES11+: 7. */
proxy_obj_p->handler = handler;
/* ES2015: 10. */
/* ES11+: 8 */
return obj_p;
} /* ecma_proxy_create */
/**
* Definition of Proxy Revocation Function
*
* See also:
* ES2015 26.2.2.1.1
*
* @return ECMA_VALUE_UNDEFINED
*/
ecma_value_t
ecma_proxy_revoke_cb (ecma_object_t *function_obj_p, /**< function object */
const ecma_value_t args_p[], /**< argument list */
const uint32_t args_count) /**< argument number */
{
JERRY_UNUSED_2 (args_p, args_count);
/* 1. */
ecma_revocable_proxy_object_t *rev_proxy_p = (ecma_revocable_proxy_object_t *) function_obj_p;
/* 2. */
if (ecma_is_value_null (rev_proxy_p->proxy))
{
return ECMA_VALUE_UNDEFINED;
}
/* 4. */
ecma_proxy_object_t *proxy_p = (ecma_proxy_object_t *) ecma_get_object_from_value (rev_proxy_p->proxy);
JERRY_ASSERT (ECMA_OBJECT_IS_PROXY ((ecma_object_t *) proxy_p));
/* 3. */
rev_proxy_p->proxy = ECMA_VALUE_NULL;
/* 5. */
proxy_p->target = ECMA_VALUE_NULL;
/* 6. */
proxy_p->handler = ECMA_VALUE_NULL;
/* 7. */
return ECMA_VALUE_UNDEFINED;
} /* ecma_proxy_revoke_cb */
/**
* Proxy.revocable operation for create a new revocable proxy object
*
* See also:
* ES2015 26.2.2.1
*
* @return NULL - if the operation fails
* pointer to the newly created revocable proxy object - otherwise
*/
ecma_object_t *
ecma_proxy_create_revocable (ecma_value_t target, /**< target argument */
ecma_value_t handler) /**< handler argument */
{
/* 1. */
ecma_object_t *proxy_p = ecma_proxy_create (target, handler, 0);
/* 2. */
if (proxy_p == NULL)
{
return proxy_p;
}
ecma_value_t proxy_value = ecma_make_object_value (proxy_p);
/* 3. */
ecma_object_t *func_obj_p;
func_obj_p = ecma_op_create_native_handler (ECMA_NATIVE_HANDLER_PROXY_REVOKE,
sizeof (ecma_revocable_proxy_object_t));
/* 4. */
ecma_revocable_proxy_object_t *rev_proxy_p = (ecma_revocable_proxy_object_t *) func_obj_p;
rev_proxy_p->proxy = proxy_value;
ecma_property_value_t *prop_value_p;
ecma_value_t revoker = ecma_make_object_value (func_obj_p);
/* 5. */
ecma_object_t *obj_p = ecma_create_object (ecma_builtin_get (ECMA_BUILTIN_ID_OBJECT_PROTOTYPE),
0,
ECMA_OBJECT_TYPE_GENERAL);
/* 6. */
prop_value_p = ecma_create_named_data_property (obj_p,
ecma_get_magic_string (LIT_MAGIC_STRING_PROXY),
ECMA_PROPERTY_CONFIGURABLE_ENUMERABLE_WRITABLE,
NULL);
prop_value_p->value = proxy_value;
/* 7. */
prop_value_p = ecma_create_named_data_property (obj_p,
ecma_get_magic_string (LIT_MAGIC_STRING_REVOKE),
ECMA_PROPERTY_CONFIGURABLE_ENUMERABLE_WRITABLE,
NULL);
prop_value_p->value = revoker;
ecma_deref_object (proxy_p);
ecma_deref_object (func_obj_p);
/* 8. */
return obj_p;
} /* ecma_proxy_create_revocable */
/**
* Internal find property operation for Proxy object
*
* Note: Returned value must be freed with ecma_free_value.
*
* @return ECMA_VALUE_ERROR - if the operation fails
* ECMA_VALUE_NOT_FOUND - if the property is not found
* value of the property - otherwise
*/
ecma_value_t
ecma_proxy_object_find (ecma_object_t *obj_p, /**< proxy object */
ecma_string_t *prop_name_p) /**< property name */
{
JERRY_ASSERT (ECMA_OBJECT_IS_PROXY (obj_p));
ecma_value_t has_result = ecma_proxy_object_has (obj_p, prop_name_p);
if (ECMA_IS_VALUE_ERROR (has_result))
{
return has_result;
}
if (ecma_is_value_false (has_result))
{
return ECMA_VALUE_NOT_FOUND;
}
return ecma_proxy_object_get (obj_p, prop_name_p, ecma_make_object_value (obj_p));
} /* ecma_proxy_object_find */
/**
* Helper method for validate the proxy object
*
* @return proxy trap - if the validation is successful
* ECMA_VALUE_ERROR - otherwise
*/
static ecma_value_t
ecma_validate_proxy_object (ecma_value_t handler, /**< proxy handler */
lit_magic_string_id_t magic_id) /**< routine magic id */
{
if (ecma_is_value_null (handler))
{
return ecma_raise_type_error (ECMA_ERR_MSG ("Handler cannot be null"));
}
JERRY_ASSERT (ecma_is_value_object (handler));
return ecma_op_get_method_by_magic_id (handler, magic_id);
} /* ecma_validate_proxy_object */
/* Interal operations */
/**
* The Proxy object [[GetPrototypeOf]] internal routine
*
* See also:
* ECMAScript v6, 9.5.1
*
* @return ECMA_VALUE_ERROR - if the operation fails
* ECMA_VALUE_NULL or valid object (prototype) otherwise
*/
ecma_value_t
ecma_proxy_object_get_prototype_of (ecma_object_t *obj_p) /**< proxy object */
{
JERRY_ASSERT (ECMA_OBJECT_IS_PROXY (obj_p));
ecma_proxy_object_t *proxy_obj_p = (ecma_proxy_object_t *) obj_p;
/* 1. */
ecma_value_t handler = proxy_obj_p->handler;
/* 2-5. */
ecma_value_t trap = ecma_validate_proxy_object (handler, LIT_MAGIC_STRING_GET_PROTOTYPE_OF_UL);
/* 6. */
if (ECMA_IS_VALUE_ERROR (trap))
{
return trap;
}
ecma_value_t target = proxy_obj_p->target;
ecma_object_t *target_obj_p = ecma_get_object_from_value (target);
/* 7. */
if (ecma_is_value_undefined (trap))
{
return ecma_builtin_object_object_get_prototype_of (target_obj_p);
}
ecma_object_t *func_obj_p = ecma_get_object_from_value (trap);
/* 8. */
ecma_value_t handler_proto = ecma_op_function_call (func_obj_p, handler, &target, 1);
ecma_deref_object (func_obj_p);
/* 9. */
if (ECMA_IS_VALUE_ERROR (handler_proto))
{
return handler_proto;
}
/* 10. */
if (!ecma_is_value_object (handler_proto) && !ecma_is_value_null (handler_proto))
{
ecma_free_value (handler_proto);
return ecma_raise_type_error (ECMA_ERR_MSG ("Trap returned neither object nor null"));
}
if (obj_p->u2.prototype_cp & JERRY_PROXY_SKIP_RESULT_VALIDATION)
{
return handler_proto;
}
/* 11. */
ecma_value_t extensible_target = ecma_builtin_object_object_is_extensible (target_obj_p);
/* 12. */
if (ECMA_IS_VALUE_ERROR (extensible_target))
{
ecma_free_value (handler_proto);
return extensible_target;
}
/* 13. */
if (ecma_is_value_true (extensible_target))
{
return handler_proto;
}
/* 14. */
ecma_value_t target_proto = ecma_builtin_object_object_get_prototype_of (target_obj_p);
/* 15. */
if (ECMA_IS_VALUE_ERROR (target_proto))
{
return target_proto;
}
ecma_value_t ret_value = handler_proto;
/* 16. */
if (handler_proto != target_proto)
{
ecma_free_value (handler_proto);
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Proxy target is non-extensible, but the trap did not "
"return its actual prototype"));
}
ecma_free_value (target_proto);
/* 17. */
return ret_value;
} /* ecma_proxy_object_get_prototype_of */
/**
* The Proxy object [[SetPrototypeOf]] internal routine
*
* See also:
* ECMAScript v6, 9.5.2
*
* Note: Returned value is always a simple value so freeing it is unnecessary.
*
* @return ECMA_VALUE_ERROR - if the operation fails
* ECMA_VALUE_{TRUE/FALSE} - depends on whether the new prototype can be set for the given object
*/
ecma_value_t
ecma_proxy_object_set_prototype_of (ecma_object_t *obj_p, /**< proxy object */
ecma_value_t proto) /**< new prototype object */
{
JERRY_ASSERT (ECMA_OBJECT_IS_PROXY (obj_p));
/* 1. */
JERRY_ASSERT (ecma_is_value_object (proto) || ecma_is_value_null (proto));
ecma_proxy_object_t *proxy_obj_p = (ecma_proxy_object_t *) obj_p;
/* 2. */
ecma_value_t handler = proxy_obj_p->handler;
/* 3-6. */
ecma_value_t trap = ecma_validate_proxy_object (handler, LIT_MAGIC_STRING_SET_PROTOTYPE_OF_UL);
/* 7.*/
if (ECMA_IS_VALUE_ERROR (trap))
{
return trap;
}
ecma_value_t target = proxy_obj_p->target;
ecma_object_t *target_obj_p = ecma_get_object_from_value (target);
/* 8. */
if (ecma_is_value_undefined (trap))
{
if (ECMA_OBJECT_IS_PROXY (target_obj_p))
{
return ecma_proxy_object_set_prototype_of (target_obj_p, proto);
}
return ecma_op_ordinary_object_set_prototype_of (target_obj_p, proto);
}
ecma_object_t *func_obj_p = ecma_get_object_from_value (trap);
ecma_value_t args[] = { target, proto };
/* 9. */
ecma_value_t trap_result = ecma_op_function_call (func_obj_p, handler, args, 2);
ecma_deref_object (func_obj_p);
/* 10. */
if (ECMA_IS_VALUE_ERROR (trap_result))
{
return trap_result;
}
bool boolean_trap_result = ecma_op_to_boolean (trap_result);
ecma_free_value (trap_result);
if (obj_p->u2.prototype_cp & JERRY_PROXY_SKIP_RESULT_VALIDATION)
{
return ecma_make_boolean_value (boolean_trap_result);
}
/* 11. */
ecma_value_t extensible_target = ecma_builtin_object_object_is_extensible (target_obj_p);
/* 12. */
if (ECMA_IS_VALUE_ERROR (extensible_target))
{
return extensible_target;
}
/* 13. */
if (ecma_is_value_true (extensible_target))
{
return ecma_make_boolean_value (boolean_trap_result);
}
/* 14. */
ecma_value_t target_proto = ecma_builtin_object_object_get_prototype_of (target_obj_p);
/* 15. */
if (ECMA_IS_VALUE_ERROR (target_proto))
{
return target_proto;
}
ecma_value_t ret_value = ecma_make_boolean_value (boolean_trap_result);
/* 16. */
if (boolean_trap_result && (target_proto != proto))
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Target object is non-extensible and trap "
"returned different prototype"));
}
ecma_free_value (target_proto);
/* 17. */
return ret_value;
} /* ecma_proxy_object_set_prototype_of */
/**
* The Proxy object [[isExtensible]] internal routine
*
* See also:
* ECMAScript v6, 9.5.3
*
* Note: Returned value is always a simple value so freeing it is unnecessary.
*
* @return ECMA_VALUE_ERROR - if the operation fails
* ECMA_VALUE_{TRUE/FALSE} - depends on whether the object is extensible
*/
ecma_value_t
ecma_proxy_object_is_extensible (ecma_object_t *obj_p) /**< proxy object */
{
JERRY_ASSERT (ECMA_OBJECT_IS_PROXY (obj_p));
ecma_proxy_object_t *proxy_obj_p = (ecma_proxy_object_t *) obj_p;
/* 1. */
ecma_value_t handler = proxy_obj_p->handler;
/* 2-5. */
ecma_value_t trap = ecma_validate_proxy_object (handler, LIT_MAGIC_STRING_IS_EXTENSIBLE);
/* 6. */
if (ECMA_IS_VALUE_ERROR (trap))
{
return trap;
}
ecma_value_t target = proxy_obj_p->target;
ecma_object_t *target_obj_p = ecma_get_object_from_value (target);
/* 7. */
if (ecma_is_value_undefined (trap))
{
return ecma_builtin_object_object_is_extensible (target_obj_p);
}
ecma_object_t *func_obj_p = ecma_get_object_from_value (trap);
/* 8. */
ecma_value_t trap_result = ecma_op_function_call (func_obj_p, handler, &target, 1);
ecma_deref_object (func_obj_p);
/* 9. */
if (ECMA_IS_VALUE_ERROR (trap_result))
{
return trap_result;
}
bool boolean_trap_result = ecma_op_to_boolean (trap_result);
ecma_free_value (trap_result);
if (obj_p->u2.prototype_cp & JERRY_PROXY_SKIP_RESULT_VALIDATION)
{
return ecma_make_boolean_value (boolean_trap_result);
}
bool target_result;
/* 10. */
if (ECMA_OBJECT_IS_PROXY (target_obj_p))
{
ecma_value_t proxy_is_ext = ecma_proxy_object_is_extensible (target_obj_p);
if (ECMA_IS_VALUE_ERROR (proxy_is_ext))
{
return proxy_is_ext;
}
target_result = ecma_is_value_true (proxy_is_ext);
}
else
{
target_result = ecma_op_ordinary_object_is_extensible (target_obj_p);
}
/* 12. */
if (boolean_trap_result != target_result)
{
return ecma_raise_type_error (ECMA_ERR_MSG ("Trap result does not reflect extensibility of Proxy target"));
}
return ecma_make_boolean_value (boolean_trap_result);
} /* ecma_proxy_object_is_extensible */
/**
* The Proxy object [[PreventExtensions]] internal routine
*
* See also:
* ECMAScript v6, 9.5.4
*
* Note: Returned value is always a simple value so freeing it is unnecessary.
*
* @return ECMA_VALUE_ERROR - if the operation fails
* ECMA_VALUE_{TRUE/FALSE} - depends on whether the object can be set as inextensible
*/
ecma_value_t
ecma_proxy_object_prevent_extensions (ecma_object_t *obj_p) /**< proxy object */
{
JERRY_ASSERT (ECMA_OBJECT_IS_PROXY (obj_p));
ecma_proxy_object_t *proxy_obj_p = (ecma_proxy_object_t *) obj_p;
/* 1. */
ecma_value_t handler = proxy_obj_p->handler;
/* 2-5. */
ecma_value_t trap = ecma_validate_proxy_object (handler, LIT_MAGIC_STRING_PREVENT_EXTENSIONS_UL);
/* 6. */
if (ECMA_IS_VALUE_ERROR (trap))
{
return trap;
}
ecma_value_t target = proxy_obj_p->target;
ecma_object_t *target_obj_p = ecma_get_object_from_value (target);
/* 7. */
if (ecma_is_value_undefined (trap))
{
ecma_value_t ret_value = ecma_builtin_object_object_prevent_extensions (target_obj_p);
if (ECMA_IS_VALUE_ERROR (ret_value))
{
return ret_value;
}
ecma_deref_object (target_obj_p);
return ECMA_VALUE_TRUE;
}
ecma_object_t *func_obj_p = ecma_get_object_from_value (trap);
/* 8. */
ecma_value_t trap_result = ecma_op_function_call (func_obj_p, handler, &target, 1);
ecma_deref_object (func_obj_p);
/* 9. */
if (ECMA_IS_VALUE_ERROR (trap_result))
{
return trap_result;
}
bool boolean_trap_result = ecma_op_to_boolean (trap_result);
ecma_free_value (trap_result);
/* 10. */
if (boolean_trap_result
&& !(obj_p->u2.prototype_cp & JERRY_PROXY_SKIP_RESULT_VALIDATION))
{
ecma_value_t target_is_ext = ecma_builtin_object_object_is_extensible (target_obj_p);
if (ECMA_IS_VALUE_ERROR (target_is_ext))
{
return target_is_ext;
}
if (ecma_is_value_true (target_is_ext))
{
return ecma_raise_type_error (ECMA_ERR_MSG ("Trap result does not reflect inextensibility of Proxy target"));
}
}
/* 11. */
return ecma_make_boolean_value (boolean_trap_result);
} /* ecma_proxy_object_prevent_extensions */
/**
* The Proxy object [[GetOwnProperty]] internal routine
*
* See also:
* ECMAScript v6, 9.5.5
*
* Note: - Returned value is always a simple value so freeing it is unnecessary.
* - If the operation does not fail, freeing the filled property descriptor is the caller's responsibility
*
* @return ECMA_VALUE_ERROR - if the operation fails
* ECMA_VALUE_{TRUE_FALSE} - depends on whether object has property with the given name
*/
ecma_value_t
ecma_proxy_object_get_own_property_descriptor (ecma_object_t *obj_p, /**< proxy object */
ecma_string_t *prop_name_p, /**< property name */
ecma_property_descriptor_t *prop_desc_p) /**< [out] property
* descriptor */
{
ecma_proxy_object_t *proxy_obj_p = (ecma_proxy_object_t *) obj_p;
/* 2. */
ecma_value_t handler = proxy_obj_p->handler;
/* 3-6. */
ecma_value_t trap = ecma_validate_proxy_object (handler, LIT_MAGIC_STRING_GET_OWN_PROPERTY_DESCRIPTOR_UL);
ecma_value_t target = proxy_obj_p->target;
/* 7. */
if (ECMA_IS_VALUE_ERROR (trap))
{
return trap;
}
ecma_object_t *target_obj_p = ecma_get_object_from_value (target);
/* 8. */
if (ecma_is_value_undefined (trap))
{
return ecma_op_object_get_own_property_descriptor (target_obj_p, prop_name_p, prop_desc_p);
}
ecma_object_t *func_obj_p = ecma_get_object_from_value (trap);
ecma_value_t prop_value = ecma_make_prop_name_value (prop_name_p);
ecma_value_t args[] = { target, prop_value };
/* 9. */
ecma_value_t trap_result = ecma_op_function_call (func_obj_p, handler, args, 2);
ecma_deref_object (func_obj_p);
/* 10. */
if (ECMA_IS_VALUE_ERROR (trap_result))
{
return trap_result;
}
/* 11. */
if (!ecma_is_value_object (trap_result) && !ecma_is_value_undefined (trap_result))
{
ecma_free_value (trap_result);
return ecma_raise_type_error (ECMA_ERR_MSG ("Trap is neither an object nor undefined"));
}
if (obj_p->u2.prototype_cp & JERRY_PROXY_SKIP_RESULT_VALIDATION)
{
if (ecma_is_value_undefined (trap_result))
{
return ECMA_VALUE_FALSE;
}
ecma_value_t result_val = ecma_op_to_property_descriptor (trap_result, prop_desc_p);
ecma_free_value (trap_result);
if (ECMA_IS_VALUE_ERROR (result_val))
{
return result_val;
}
ecma_op_to_complete_property_descriptor (prop_desc_p);
return ECMA_VALUE_TRUE;
}
/* 12. */
ecma_property_descriptor_t target_desc;
ecma_value_t target_status = ecma_op_object_get_own_property_descriptor (target_obj_p, prop_name_p, &target_desc);
/* 13. */
if (ECMA_IS_VALUE_ERROR (target_status))
{
ecma_free_value (trap_result);
return target_status;
}
/* 14. */
if (ecma_is_value_undefined (trap_result))
{
/* .a */
if (ecma_is_value_false (target_status))
{
return ECMA_VALUE_FALSE;
}
/* .b */
if (!(target_desc.flags & ECMA_PROP_IS_CONFIGURABLE))
{
ecma_free_property_descriptor (&target_desc);
return ecma_raise_type_error (ECMA_ERR_MSG ("Given property is a non-configurable"
" data property on the proxy target"));
}
/* .c */
ecma_free_property_descriptor (&target_desc);
ecma_value_t extensible_target = ecma_builtin_object_object_is_extensible (target_obj_p);
/* .d */
if (ECMA_IS_VALUE_ERROR (extensible_target))
{
return extensible_target;
}
/* .e */
JERRY_ASSERT (ecma_is_value_boolean (extensible_target));
/* .f */
if (ecma_is_value_false (extensible_target))
{
return ecma_raise_type_error (ECMA_ERR_MSG ("Target not extensible"));
}
/* .g */
return ECMA_VALUE_FALSE;
}
/* 15. */
ecma_value_t extensible_target = ecma_builtin_object_object_is_extensible (target_obj_p);
/* 16. */
if (ECMA_IS_VALUE_ERROR (extensible_target))
{
if (ecma_is_value_true (target_status))
{
ecma_free_property_descriptor (&target_desc);
}
ecma_free_value (trap_result);
return extensible_target;
}
/* 17, 19 */
ecma_value_t result_val = ecma_op_to_property_descriptor (trap_result, prop_desc_p);
ecma_op_to_complete_property_descriptor (prop_desc_p);
ecma_free_value (trap_result);
/* 18. */
if (ECMA_IS_VALUE_ERROR (result_val))
{
if (ecma_is_value_true (target_status))
{
ecma_free_property_descriptor (&target_desc);
}
return result_val;
}
/* 20. */
bool is_extensible = ecma_is_value_true (extensible_target);
bool is_valid = ecma_op_is_compatible_property_descriptor (prop_desc_p,
(ecma_is_value_true (target_status) ? &target_desc : NULL),
is_extensible);
bool target_has_desc = ecma_is_value_true (target_status);
bool target_is_writable = (target_desc.flags & ECMA_PROP_IS_WRITABLE) ;
bool target_is_configurable = false;
if (target_has_desc)
{
target_is_configurable = ((target_desc.flags & ECMA_PROP_IS_CONFIGURABLE) != 0);
ecma_free_property_descriptor (&target_desc);
}
/* 21. */
if (!is_valid)
{
ecma_free_property_descriptor (prop_desc_p);
return ecma_raise_type_error (ECMA_ERR_MSG ("The two descriptors are incompatible"));
}
/* 22. */
else if (!(prop_desc_p->flags & ECMA_PROP_IS_CONFIGURABLE))
{
const uint16_t mask = (ECMA_PROP_IS_WRITABLE_DEFINED | ECMA_PROP_IS_WRITABLE);
if (!target_has_desc
|| target_is_configurable
|| ((prop_desc_p->flags & mask) == ECMA_PROP_IS_WRITABLE_DEFINED
&& target_is_writable))
{
ecma_free_property_descriptor (prop_desc_p);
return ecma_raise_type_error (ECMA_ERR_MSG ("The two descriptors are incompatible"));
}
}
return ECMA_VALUE_TRUE;
} /* ecma_proxy_object_get_own_property_descriptor */
/**
* The Proxy object [[DefineOwnProperty]] internal routine
*
* See also:
* ECMAScript v6, 9.5.6
*
* Note: Returned value is always a simple value so freeing it is unnecessary.
*
* @return ECMA_VALUE_ERROR - if the operation fails
* ECMA_VALUE_{TRUE_FALSE} - depends on whether the property can be defined for the given object
*/
ecma_value_t
ecma_proxy_object_define_own_property (ecma_object_t *obj_p, /**< proxy object */
ecma_string_t *prop_name_p, /**< property name */
const ecma_property_descriptor_t *prop_desc_p) /**< property descriptor */
{
JERRY_ASSERT (ECMA_OBJECT_IS_PROXY (obj_p));
ecma_proxy_object_t *proxy_obj_p = (ecma_proxy_object_t *) obj_p;
/* 2. */
ecma_value_t handler = proxy_obj_p->handler;
/* 3-6. */
ecma_value_t trap = ecma_validate_proxy_object (handler, LIT_MAGIC_STRING_DEFINE_PROPERTY_UL);
/* 7. */
if (ECMA_IS_VALUE_ERROR (trap))
{
return trap;
}
ecma_value_t target = proxy_obj_p->target;
ecma_object_t *target_obj_p = ecma_get_object_from_value (target);
/* 8. */
if (ecma_is_value_undefined (trap))
{
return ecma_op_object_define_own_property (target_obj_p, prop_name_p, prop_desc_p);
}
/* 9. */
ecma_object_t *desc_obj = ecma_op_from_property_descriptor (prop_desc_p);
ecma_object_t *func_obj_p = ecma_get_object_from_value (trap);
ecma_value_t prop_value = ecma_make_prop_name_value (prop_name_p);
ecma_value_t desc_obj_value = ecma_make_object_value (desc_obj);
ecma_value_t args[] = {target, prop_value, desc_obj_value};
/* 10. */
ecma_value_t trap_result = ecma_op_function_call (func_obj_p, handler, args, 3);
ecma_deref_object (func_obj_p);
ecma_deref_object (desc_obj);
/* 11. */
if (ECMA_IS_VALUE_ERROR (trap_result))
{
return trap_result;
}
bool boolean_trap_result = ecma_op_to_boolean (trap_result);
ecma_free_value (trap_result);
/* 12. */
if (!boolean_trap_result)
{
return ECMA_VALUE_FALSE;
}
if (obj_p->u2.prototype_cp & JERRY_PROXY_SKIP_RESULT_VALIDATION)
{
return ECMA_VALUE_TRUE;
}
/* 13. */
ecma_property_descriptor_t target_desc;
ecma_value_t status = ecma_op_object_get_own_property_descriptor (target_obj_p, prop_name_p, &target_desc);
/* 14. */
if (ECMA_IS_VALUE_ERROR (status))
{
return status;
}
bool target_prop_found = ecma_is_value_true (status);
/* 15. */
ecma_value_t extensible_target = ecma_builtin_object_object_is_extensible (target_obj_p);
bool is_target_ext = ecma_is_value_true (extensible_target);
/* 16. */
if (ECMA_IS_VALUE_ERROR (extensible_target))
{
if (target_prop_found)
{
ecma_free_property_descriptor (&target_desc);
}
return extensible_target;
}
/* 17. */
bool setting_config_false = ((prop_desc_p->flags & ECMA_PROP_IS_CONFIGURABLE_DEFINED)
&& !(prop_desc_p->flags & ECMA_PROP_IS_CONFIGURABLE));
/* 19. */
if (!target_prop_found)
{
if (!is_target_ext)
{
return ecma_raise_type_error (ECMA_ERR_MSG ("Trap returned truish for adding property "
"to the non-extensible target"));
}
if (setting_config_false)
{
return ecma_raise_type_error (ECMA_ERR_MSG ("Trap returned truish for defining non-configurable property "
"which is non-existent in the target"));
}
}
/* 20. */
else
{
ecma_value_t ret_value = ECMA_VALUE_EMPTY;
if (!ecma_op_is_compatible_property_descriptor (prop_desc_p, &target_desc, is_target_ext))
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Trap returned truish for adding property that is "
"incompatible with the existing property in the target"));
}
else if (setting_config_false && (target_desc.flags & ECMA_PROP_IS_CONFIGURABLE))
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Trap returned truish for defining non-configurable property "
"which is configurable in the target"));
}
/* ES11: 16.c */
else if ((target_desc.flags & (ECMA_PROP_IS_VALUE_DEFINED | ECMA_PROP_IS_WRITABLE_DEFINED)) != 0
&& (prop_desc_p->flags & (ECMA_PROP_IS_WRITABLE_DEFINED | ECMA_PROP_IS_WRITABLE))
== ECMA_PROP_IS_WRITABLE_DEFINED
&& (target_desc.flags & (ECMA_PROP_IS_WRITABLE | ECMA_PROP_IS_CONFIGURABLE)) == ECMA_PROP_IS_WRITABLE)
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Trap returned truish for defining non-configurable property "
"which is configurable in the target"));
}
ecma_free_property_descriptor (&target_desc);
if (ECMA_IS_VALUE_ERROR (ret_value))
{
return ret_value;
}
}
return ECMA_VALUE_TRUE;
} /* ecma_proxy_object_define_own_property */
/**
* The Proxy object [[HasProperty]] internal routine
*
* See also:
* ECMAScript v6, 9.5.7
*
* Note: Returned value is always a simple value so freeing it is unnecessary.
*
* @return ECMA_VALUE_ERROR - if the operation fails
* ECMA_VALUE_{TRUE_FALSE} - depends on whether the property is found
*/
ecma_value_t
ecma_proxy_object_has (ecma_object_t *obj_p, /**< proxy object */
ecma_string_t *prop_name_p) /**< property name */
{
JERRY_ASSERT (ECMA_OBJECT_IS_PROXY (obj_p));
ECMA_CHECK_STACK_USAGE ();
ecma_proxy_object_t *proxy_obj_p = (ecma_proxy_object_t *) obj_p;
/* 2. */
ecma_value_t handler = proxy_obj_p->handler;
/* 3-6. */
ecma_value_t trap = ecma_validate_proxy_object (handler, LIT_MAGIC_STRING_HAS);
/* 7. */
if (ECMA_IS_VALUE_ERROR (trap))
{
return trap;
}
ecma_value_t target = proxy_obj_p->target;
ecma_object_t *target_obj_p = ecma_get_object_from_value (target);
/* 8. */
if (ecma_is_value_undefined (trap))
{
return ecma_op_object_has_property (target_obj_p, prop_name_p);
}
ecma_object_t *func_obj_p = ecma_get_object_from_value (trap);
ecma_value_t prop_value = ecma_make_prop_name_value (prop_name_p);
ecma_value_t args[] = {target, prop_value};
/* 9. */
ecma_value_t trap_result = ecma_op_function_call (func_obj_p, handler, args, 2);
ecma_deref_object (func_obj_p);
/* 10. */
if (ECMA_IS_VALUE_ERROR (trap_result))
{
return trap_result;
}
bool boolean_trap_result = ecma_op_to_boolean (trap_result);
ecma_free_value (trap_result);
/* 11. */
if (!boolean_trap_result
&& !(obj_p->u2.prototype_cp & JERRY_PROXY_SKIP_RESULT_VALIDATION))
{
ecma_property_descriptor_t target_desc;
ecma_value_t status = ecma_op_object_get_own_property_descriptor (target_obj_p, prop_name_p, &target_desc);
if (ECMA_IS_VALUE_ERROR (status))
{
return status;
}
if (ecma_is_value_true (status))
{
bool prop_is_configurable = target_desc.flags & ECMA_PROP_IS_CONFIGURABLE;
ecma_free_property_descriptor (&target_desc);
if (!prop_is_configurable)
{
return ecma_raise_type_error (ECMA_ERR_MSG ("Trap returned falsish for property which exists "
"in the proxy target as non-configurable"));
}
ecma_value_t extensible_target = ecma_builtin_object_object_is_extensible (target_obj_p);
if (ECMA_IS_VALUE_ERROR (extensible_target))
{
return extensible_target;
}
if (ecma_is_value_false (extensible_target))
{
return ecma_raise_type_error (ECMA_ERR_MSG ("Trap returned falsish for property but "
"the proxy target is not extensible"));
}
}
}
/* 12. */
return ecma_make_boolean_value (boolean_trap_result);
} /* ecma_proxy_object_has */
/**
* The Proxy object [[Get]] internal routine
*
* See also:
* ECMAScript v6, 9.5.8
*
* Note: Returned value is always a simple value so freeing it is unnecessary.
*
* @return ECMA_VALUE_ERROR - if the operation fails
* value of the given nameddata property or the result of the getter function call - otherwise
*/
ecma_value_t
ecma_proxy_object_get (ecma_object_t *obj_p, /**< proxy object */
ecma_string_t *prop_name_p, /**< property name */
ecma_value_t receiver) /**< receiver to invoke getter function */
{
JERRY_ASSERT (ECMA_OBJECT_IS_PROXY (obj_p));
ECMA_CHECK_STACK_USAGE ();
ecma_proxy_object_t *proxy_obj_p = (ecma_proxy_object_t *) obj_p;
/* 2. */
ecma_value_t handler = proxy_obj_p->handler;
/* 3-6. */
ecma_value_t trap = ecma_validate_proxy_object (handler, LIT_MAGIC_STRING_GET);
/* 7. */
if (ECMA_IS_VALUE_ERROR (trap))
{
return trap;
}
/* 8. */
if (ecma_is_value_undefined (trap))
{
ecma_object_t *target_obj_p = ecma_get_object_from_value (proxy_obj_p->target);
return ecma_op_object_get_with_receiver (target_obj_p, prop_name_p, receiver);
}
ecma_object_t *func_obj_p = ecma_get_object_from_value (trap);
ecma_value_t prop_value = ecma_make_prop_name_value (prop_name_p);
ecma_value_t args[] = { proxy_obj_p->target, prop_value, receiver };
/* 9. */
ecma_value_t trap_result = ecma_op_function_call (func_obj_p, handler, args, 3);
ecma_deref_object (func_obj_p);
/* 10. */
if (ECMA_IS_VALUE_ERROR (trap_result)
|| (obj_p->u2.prototype_cp & JERRY_PROXY_SKIP_RESULT_VALIDATION))
{
return trap_result;
}
/* 11. */
ecma_property_descriptor_t target_desc;
ecma_value_t status = ecma_op_get_own_property_descriptor (proxy_obj_p->target, prop_name_p, &target_desc);
/* 12. */
if (ECMA_IS_VALUE_ERROR (status))
{
ecma_free_value (trap_result);
return status;
}
/* 13. */
if (ecma_is_value_true (status))
{
ecma_value_t ret_value = ECMA_VALUE_EMPTY;
if ((target_desc.flags & ECMA_PROP_IS_VALUE_DEFINED)
&& !(target_desc.flags & ECMA_PROP_IS_CONFIGURABLE)
&& !(target_desc.flags & ECMA_PROP_IS_WRITABLE)
&& !ecma_op_same_value (trap_result, target_desc.value))
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Incorrect value is returned by a Proxy 'get' trap"));
}
else if (!(target_desc.flags & ECMA_PROP_IS_CONFIGURABLE)
&& (target_desc.flags & (ECMA_PROP_IS_GET_DEFINED | ECMA_PROP_IS_SET_DEFINED))
&& target_desc.get_p == NULL
&& !ecma_is_value_undefined (trap_result))
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Property of a Proxy is non-configurable and "
"does not have a getter function"));
}
ecma_free_property_descriptor (&target_desc);
if (ECMA_IS_VALUE_ERROR (ret_value))
{
ecma_free_value (trap_result);
return ret_value;
}
}
/* 14. */
return trap_result;
} /* ecma_proxy_object_get */
/**
* The Proxy object [[Set]] internal routine
*
* See also:
* ECMAScript v6, 9.5.9
*
* Note: Returned value is always a simple value so freeing it is unnecessary.
*
* @return ECMA_VALUE_ERROR - if the operation fails
* ECMA_VALUE_{TRUE/FALSE} - depends on whether the propety can be set to the given object
*/
ecma_value_t
ecma_proxy_object_set (ecma_object_t *obj_p, /**< proxy object */
ecma_string_t *prop_name_p, /**< property name */
ecma_value_t value, /**< value to set */
ecma_value_t receiver, /**< receiver to invoke setter function */
bool is_strict) /**< indicate strict mode */
{
JERRY_ASSERT (ECMA_OBJECT_IS_PROXY (obj_p));
ECMA_CHECK_STACK_USAGE ();
ecma_proxy_object_t *proxy_obj_p = (ecma_proxy_object_t *) obj_p;
/* 2. */
ecma_value_t handler = proxy_obj_p->handler;
/* 3-6. */
ecma_value_t trap = ecma_validate_proxy_object (handler, LIT_MAGIC_STRING_SET);
/* 7. */
if (ECMA_IS_VALUE_ERROR (trap))
{
return trap;
}
ecma_value_t target = proxy_obj_p->target;
ecma_object_t *target_obj_p = ecma_get_object_from_value (target);
/* 8. */
if (ecma_is_value_undefined (trap))
{
return ecma_op_object_put_with_receiver (target_obj_p, prop_name_p, value, receiver, is_strict);
}
ecma_object_t *func_obj_p = ecma_get_object_from_value (trap);
ecma_value_t prop_name_value = ecma_make_prop_name_value (prop_name_p);
ecma_value_t args[] = { target, prop_name_value, value, receiver };
/* 9. */
ecma_value_t trap_result = ecma_op_function_call (func_obj_p, handler, args, 4);
ecma_deref_object (func_obj_p);
/* 10. */
if (ECMA_IS_VALUE_ERROR (trap_result))
{
return trap_result;
}
bool boolean_trap_result = ecma_op_to_boolean (trap_result);
ecma_free_value (trap_result);
/* 11. */
if (!boolean_trap_result)
{
if (is_strict)
{
return ecma_raise_type_error (ECMA_ERR_MSG ("Proxy trap returned falsish"));
}
return ECMA_VALUE_FALSE;
}
if (obj_p->u2.prototype_cp & JERRY_PROXY_SKIP_RESULT_VALIDATION)
{
return ECMA_VALUE_TRUE;
}
/* 12. */
ecma_property_descriptor_t target_desc;
ecma_value_t status = ecma_op_object_get_own_property_descriptor (target_obj_p, prop_name_p, &target_desc);
/* 13. */
if (ECMA_IS_VALUE_ERROR (status))
{
return status;
}
/* 14. */
if (ecma_is_value_true (status))
{
ecma_value_t ret_value = ECMA_VALUE_EMPTY;
if ((target_desc.flags & ECMA_PROP_IS_VALUE_DEFINED)
&& !(target_desc.flags & ECMA_PROP_IS_CONFIGURABLE)
&& !(target_desc.flags & ECMA_PROP_IS_WRITABLE)
&& !ecma_op_same_value (value, target_desc.value))
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Incorrect value is returned by a Proxy 'set' trap"));
}
else if (!(target_desc.flags & ECMA_PROP_IS_CONFIGURABLE)
&& (target_desc.flags & (ECMA_PROP_IS_GET_DEFINED | ECMA_PROP_IS_SET_DEFINED))
&& target_desc.set_p == NULL)
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("The property of a Proxy target is a non "
"configurable accessor without a setter"));
}
ecma_free_property_descriptor (&target_desc);
if (ECMA_IS_VALUE_ERROR (ret_value))
{
return ret_value;
}
}
/* 15. */
return ECMA_VALUE_TRUE;
} /* ecma_proxy_object_set */
/**
* The Proxy object [[Delete]] internal routine
*
* See also:
* ECMAScript v6, 9.5.10
*
* Note: Returned value is always a simple value so freeing it is unnecessary.
*
* @return ECMA_VALUE_ERROR - if the operation fails
* ECMA_VALUE_{TRUE/FALSE} - depends on whether the propety can be deleted
*/
ecma_value_t
ecma_proxy_object_delete_property (ecma_object_t *obj_p, /**< proxy object */
ecma_string_t *prop_name_p, /**< property name */
bool is_strict) /**< delete in strict mode? */
{
JERRY_ASSERT (ECMA_OBJECT_IS_PROXY (obj_p));
ecma_proxy_object_t *proxy_obj_p = (ecma_proxy_object_t *) obj_p;
/* 2. */
ecma_value_t handler = proxy_obj_p->handler;
/* 3-6.*/
ecma_value_t trap = ecma_validate_proxy_object (handler, LIT_MAGIC_STRING_DELETE_PROPERTY_UL);
/* 7. */
if (ECMA_IS_VALUE_ERROR (trap))
{
return trap;
}
ecma_value_t target = proxy_obj_p->target;
ecma_object_t *target_obj_p = ecma_get_object_from_value (target);
/* 8. */
if (ecma_is_value_undefined (trap))
{
return ecma_op_object_delete (target_obj_p, prop_name_p, is_strict);
}
ecma_object_t *func_obj_p = ecma_get_object_from_value (trap);
ecma_value_t prop_name_value = ecma_make_prop_name_value (prop_name_p);
ecma_value_t args[] = { target, prop_name_value };
/* 9. */
ecma_value_t trap_result = ecma_op_function_call (func_obj_p, handler, args, 2);
ecma_deref_object (func_obj_p);
/* 10. */
if (ECMA_IS_VALUE_ERROR (trap_result))
{
return trap_result;
}
bool boolean_trap_result = ecma_op_to_boolean (trap_result);
ecma_free_value (trap_result);
/* 11. */
if (!boolean_trap_result)
{
return ECMA_VALUE_FALSE;
}
if (obj_p->u2.prototype_cp & JERRY_PROXY_SKIP_RESULT_VALIDATION)
{
return ECMA_VALUE_TRUE;
}
/* 12. */
ecma_property_descriptor_t target_desc;
ecma_value_t status = ecma_op_object_get_own_property_descriptor (target_obj_p, prop_name_p, &target_desc);
/* 13. */
if (ECMA_IS_VALUE_ERROR (status))
{
return status;
}
/* 14. */
if (ecma_is_value_false (status))
{
return ECMA_VALUE_TRUE;
}
ecma_value_t ret_value = ECMA_VALUE_TRUE;
/* 15. */
if (!(target_desc.flags & ECMA_PROP_IS_CONFIGURABLE))
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Trap returned truish for property which is "
"non-configurable in the proxy target"));
}
/* ES11: 13-14 */
ecma_value_t extensible_target = ecma_builtin_object_object_is_extensible (target_obj_p);
if (!ecma_is_value_true (extensible_target))
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Trap returned truish for target is not extensible"));
}
ecma_free_property_descriptor (&target_desc);
/* 16. */
return ret_value;
} /* ecma_proxy_object_delete_property */
/**
* Helper method for the Proxy object [[OwnPropertyKeys]] operation
*
* See also:
* ECMAScript v6, 9.5.12 steps 21. 23.
*
* @return ECMA_VALUE_ERROR - if a target key is not in the unchecked_result_keys collection
* ECMA_VALUE_EMPTY - otherwise
*/
static ecma_value_t
ecma_proxy_object_own_property_keys_helper (ecma_collection_t *target_collection, /**< target keys */
ecma_collection_t *unchecked_result_keys, /**< unchecked keys */
uint32_t *counter) /**< unchecked property counter */
{
ecma_value_t ret_value = ECMA_VALUE_EMPTY;
for (uint32_t i = 0; i < target_collection->item_count; i++)
{
ecma_string_t *current_prop_name = ecma_get_prop_name_from_value (target_collection->buffer_p[i]);
ret_value = ECMA_VALUE_ERROR;
for (uint32_t j = 0; j < unchecked_result_keys->item_count; j++)
{
if (ecma_is_value_empty (unchecked_result_keys->buffer_p[j]))
{
continue;
}
ecma_string_t *unchecked_prop_name = ecma_get_prop_name_from_value (unchecked_result_keys->buffer_p[j]);
if (ecma_compare_ecma_strings (current_prop_name, unchecked_prop_name))
{
ecma_deref_ecma_string (unchecked_prop_name);
ret_value = ECMA_VALUE_EMPTY;
unchecked_result_keys->buffer_p[j] = ECMA_VALUE_EMPTY;
(*counter)++;
}
}
if (ECMA_IS_VALUE_ERROR (ret_value))
{
break;
}
}
return ret_value;
} /* ecma_proxy_object_own_property_keys_helper */
/**
* Helper method for checking the invariants in the Proxy object [[OwnPropertyKeys]] operation
*
* See also:
* ECMAScript v6, 9.5.12 steps 20-25.
*
* @return true - if none of the invariants got violated
* false - otherwise
*/
static bool
ecma_proxy_check_invariants_for_own_prop_keys (ecma_collection_t *trap_result,
ecma_collection_t *target_non_configurable_keys,
ecma_collection_t *target_configurable_keys,
ecma_value_t extensible_target)
{
/* 20. */
ecma_collection_t *unchecked_result_keys = ecma_new_collection ();
ecma_collection_append (unchecked_result_keys, trap_result->buffer_p, trap_result->item_count);
for (uint32_t i = 0; i < unchecked_result_keys->item_count; i++)
{
ecma_string_t *unchecked_prop_name = ecma_get_prop_name_from_value (unchecked_result_keys->buffer_p[i]);
ecma_ref_ecma_string (unchecked_prop_name);
}
bool check_ok = false;
uint32_t unchecked_prop_name_counter = 0;
/* 21. */
if (ECMA_IS_VALUE_ERROR (ecma_proxy_object_own_property_keys_helper (target_non_configurable_keys,
unchecked_result_keys,
&unchecked_prop_name_counter)))
{
ecma_raise_type_error (ECMA_ERR_MSG ("Trap result did not include all non-configurable keys"));
}
/* 22. */
else if (ecma_is_value_true (extensible_target))
{
check_ok = true;
}
/* 23. */
else if (ECMA_IS_VALUE_ERROR (ecma_proxy_object_own_property_keys_helper (target_configurable_keys,
unchecked_result_keys,
&unchecked_prop_name_counter)))
{
ecma_raise_type_error (ECMA_ERR_MSG ("Trap result did not include all configurable keys"));
}
/* 24. */
else if (unchecked_result_keys->item_count != unchecked_prop_name_counter)
{
ecma_raise_type_error (ECMA_ERR_MSG ("Trap returned extra keys for a non-extensible Proxy target"));
}
/* 25. */
else
{
check_ok = true;
}
ecma_collection_free (unchecked_result_keys);
return check_ok;
} /* ecma_proxy_check_invariants_for_own_prop_keys */
/**
* The Proxy object [[OwnPropertyKeys]] internal routine
*
* See also:
* ECMAScript v11, 9.5.11
*
* Note: If the returned collection is not NULL, it must be freed with
* ecma_collection_free if it is no longer needed
*
* @return NULL - if the operation fails
* pointer to a newly allocated list of property names - otherwise
*/
ecma_collection_t *
ecma_proxy_object_own_property_keys (ecma_object_t *obj_p) /**< proxy object */
{
JERRY_ASSERT (ECMA_OBJECT_IS_PROXY (obj_p));
ecma_proxy_object_t *proxy_obj_p = (ecma_proxy_object_t *) obj_p;
/* 1. */
ecma_value_t handler = proxy_obj_p->handler;
/* 2-5. */
ecma_value_t trap = ecma_validate_proxy_object (handler, LIT_MAGIC_STRING_OWN_KEYS_UL);
if (ECMA_IS_VALUE_ERROR (trap))
{
return NULL;
}
ecma_value_t target = proxy_obj_p->target;
ecma_object_t *target_obj_p = ecma_get_object_from_value (target);
/* 6. */
if (ecma_is_value_undefined (trap))
{
return ecma_op_object_own_property_keys (target_obj_p);
}
ecma_object_t *func_obj_p = ecma_get_object_from_value (trap);
/* 7. */
ecma_value_t trap_result_array = ecma_op_function_call (func_obj_p, handler, &target, 1);
ecma_deref_object (func_obj_p);
if (ECMA_IS_VALUE_ERROR (trap_result_array))
{
return NULL;
}
/* 8. */
ecma_collection_t *trap_result = ecma_op_create_list_from_array_like (trap_result_array, true);
ecma_free_value (trap_result_array);
if (trap_result == NULL
|| (obj_p->u2.prototype_cp & JERRY_PROXY_SKIP_RESULT_VALIDATION))
{
return trap_result;
}
/* 9. */
if (ecma_collection_check_duplicated_entries (trap_result))
{
ecma_collection_free (trap_result);
ecma_raise_type_error (ECMA_ERR_MSG ("Trap returned with duplicated entries"));
return NULL;
}
/* 10. */
ecma_value_t extensible_target = ecma_builtin_object_object_is_extensible (target_obj_p);
if (ECMA_IS_VALUE_ERROR (extensible_target))
{
ecma_collection_free (trap_result);
return NULL;
}
/* 11. */
ecma_collection_t *target_keys = ecma_op_object_own_property_keys (target_obj_p);
if (target_keys == NULL)
{
ecma_collection_free (trap_result);
return target_keys;
}
/* 14. */
ecma_collection_t *target_configurable_keys = ecma_new_collection ();
/* 15. */
ecma_collection_t *target_non_configurable_keys = ecma_new_collection ();
ecma_collection_t *ret_value = NULL;
/* 16. */
for (uint32_t i = 0; i < target_keys->item_count; i++)
{
ecma_property_descriptor_t target_desc;
ecma_string_t *prop_name_p = ecma_get_prop_name_from_value (target_keys->buffer_p[i]);
ecma_value_t status = ecma_op_object_get_own_property_descriptor (target_obj_p,
prop_name_p,
&target_desc);
if (ECMA_IS_VALUE_ERROR (status))
{
ecma_collection_free (trap_result);
goto free_target_collections;
}
ecma_value_t prop_value = ecma_make_prop_name_value (prop_name_p);
if (ecma_is_value_true (status)
&& !(target_desc.flags & ECMA_PROP_IS_CONFIGURABLE))
{
ecma_collection_push_back (target_non_configurable_keys, prop_value);
}
else
{
ecma_collection_push_back (target_configurable_keys, prop_value);
}
if (ecma_is_value_true (status))
{
ecma_free_property_descriptor (&target_desc);
}
}
/* 17. */
if (ecma_is_value_true (extensible_target) && target_non_configurable_keys->item_count == 0)
{
ret_value = trap_result;
}
/* 18-22. */
else if (ecma_proxy_check_invariants_for_own_prop_keys (trap_result,
target_non_configurable_keys,
target_configurable_keys,
extensible_target))
{
ret_value = trap_result;
}
else
{
JERRY_ASSERT (ret_value == NULL);
ecma_collection_free (trap_result);
}
free_target_collections:
ecma_collection_destroy (target_keys);
ecma_collection_free (target_configurable_keys);
ecma_collection_free (target_non_configurable_keys);
/* 23. */
return ret_value;
} /* ecma_proxy_object_own_property_keys */
/**
* The Proxy object [[Call]] internal routine
*
* See also:
* ECMAScript v6, 9.5.13
*
* Note: Returned value must be freed with ecma_free_value.
*
* @return ECMA_VALUE_ERROR - if the operation fails
* result of the function call - otherwise
*/
ecma_value_t
ecma_proxy_object_call (ecma_object_t *obj_p, /**< proxy object */
ecma_value_t this_argument, /**< this argument to invoke the function */
const ecma_value_t *args_p, /**< argument list */
uint32_t argc) /**< number of arguments */
{
JERRY_ASSERT (ECMA_OBJECT_IS_PROXY (obj_p));
ecma_proxy_object_t *proxy_obj_p = (ecma_proxy_object_t *) obj_p;
/* 1. */
ecma_value_t handler = proxy_obj_p->handler;
/* 2-5.*/
ecma_value_t trap = ecma_validate_proxy_object (handler, LIT_MAGIC_STRING_APPLY);
/* 6. */
if (ECMA_IS_VALUE_ERROR (trap))
{
return trap;
}
ecma_value_t target = proxy_obj_p->target;
/* 7. */
if (ecma_is_value_undefined (trap))
{
ecma_object_t *target_obj_p = ecma_get_object_from_value (target);
return ecma_op_function_call (target_obj_p, this_argument, args_p, argc);
}
/* 8. */
ecma_value_t args_array = ecma_op_new_array_object_from_buffer (args_p, argc);
ecma_value_t value_array[] = {target, this_argument, args_array};
ecma_object_t *func_obj_p = ecma_get_object_from_value (trap);
/* 9. */
ecma_value_t ret_value = ecma_op_function_call (func_obj_p, handler, value_array, 3);
ecma_deref_object (func_obj_p);
ecma_free_object (args_array);
return ret_value;
} /* ecma_proxy_object_call */
/**
* The Proxy object [[Construct]] internal routine
*
* See also:
* ECMAScript v6, 9.5.14
*
* Note: Returned value must be freed with ecma_free_value.
*
* @return ECMA_VALUE_ERROR - if the operation fails
* result of the construct call - otherwise
*/
ecma_value_t
ecma_proxy_object_construct (ecma_object_t *obj_p, /**< proxy object */
ecma_object_t *new_target_p, /**< new target */
const ecma_value_t *args_p, /**< argument list */
uint32_t argc) /**< number of arguments */
{
JERRY_ASSERT (ECMA_OBJECT_IS_PROXY (obj_p));
ecma_proxy_object_t * proxy_obj_p = (ecma_proxy_object_t *) obj_p;
/* 1. */
ecma_value_t handler = proxy_obj_p->handler;
/* 2-5. */
ecma_value_t trap = ecma_validate_proxy_object (handler, LIT_MAGIC_STRING_CONSTRUCT);
/* 6. */
if (ECMA_IS_VALUE_ERROR (trap))
{
return trap;
}
ecma_value_t target = proxy_obj_p->target;
ecma_object_t *target_obj_p = ecma_get_object_from_value (target);
/* 7. */
if (ecma_is_value_undefined (trap))
{
JERRY_ASSERT (ecma_object_is_constructor (target_obj_p));
return ecma_op_function_construct (target_obj_p, new_target_p, args_p, argc);
}
/* 8. */
ecma_value_t args_array = ecma_op_new_array_object_from_buffer (args_p, argc);
ecma_object_t *func_obj_p = ecma_get_object_from_value (trap);
ecma_value_t new_target_value = ecma_make_object_value (new_target_p);
ecma_value_t function_call_args[] = {target, args_array, new_target_value};
/* 9. */
ecma_value_t new_obj = ecma_op_function_call (func_obj_p, handler, function_call_args, 3);
ecma_free_object (args_array);
ecma_deref_object (func_obj_p);
/* 10 .*/
if (ECMA_IS_VALUE_ERROR (new_obj))
{
return new_obj;
}
/* 11. */
if (!ecma_is_value_object (new_obj))
{
ecma_free_value (new_obj);
return ecma_raise_type_error (ECMA_ERR_MSG ("Trap must return with an object"));
}
/* 12. */
return new_obj;
} /* ecma_proxy_object_construct */
#endif /* JERRY_BUILTIN_PROXY */
/**
* @}
* @}
*/
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