mirror of
https://github.com/jerryscript-project/jerryscript.git
synced 2025-12-15 16:29:21 +00:00
47f2f0ea8b
ECMA_GET_POINTER is removed from:
- property list iteration
- lexical environment chain iteration
- prototype chain iteration
For all these iteration the compressed pointer can be used to get the elements and only decompressed them if it is necessary.
- Properly guard ecma property hashmap routines
- Remove the redundant NULL pointer check from ecma_create_property
- Remove ecma_gc_get_object_next since it became unnecessary
- Substitute ECMA_{GET,SET}_POINTER with ECMA_{GET,SET}_NON_NULL pointer when we can assume the pointer is not NULL
- Remove ecma_get_object_prototype and ecma_get_lex_env_outer_reference helper function the reduce the number of NULL pointer checks during decompressing the pointers
- Remove ecma_get_named_accessor_property_{getter,setter} helper functions for also reduce the number of NULL pointer check/decompressions
- Remove ECMA_PROPERTY_SEARCH_DEPTH_LIMIT since in ES5 there is no way to create circular prototype chain, and the ES2015 setPrototypeOf method can resolve this error so this check during the property lookup can be eliminated.
JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
568 lines
18 KiB
C
568 lines
18 KiB
C
/* Copyright JS Foundation and other contributors, http://js.foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "ecma-builtins.h"
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#include "ecma-exceptions.h"
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#include "ecma-function-object.h"
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#include "ecma-gc.h"
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#include "ecma-globals.h"
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#include "ecma-helpers.h"
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#include "ecma-objects.h"
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#include "ecma-objects-general.h"
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#include "ecma-try-catch-macro.h"
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/** \addtogroup ecma ECMA
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* @{
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*
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* \addtogroup ecmaobjectsinternalops ECMA objects' operations
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* @{
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*/
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/**
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* Reject sequence
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*
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* @return ecma value
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* Returned value must be freed with ecma_free_value
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*/
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ecma_value_t
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ecma_reject (bool is_throw) /**< Throw flag */
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{
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if (is_throw)
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{
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return ecma_raise_type_error (ECMA_ERR_MSG ("Invalid argument type."));
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}
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else
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{
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return ECMA_VALUE_FALSE;
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}
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} /* ecma_reject */
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/**
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* 'Object' object creation operation with no arguments.
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*
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* See also: ECMA-262 v5, 15.2.2.1
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*
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* @return pointer to newly created 'Object' object
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*/
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ecma_object_t *
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ecma_op_create_object_object_noarg (void)
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{
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ecma_object_t *object_prototype_p = ecma_builtin_get (ECMA_BUILTIN_ID_OBJECT_PROTOTYPE);
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/* 3., 4., 6., 7. */
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return ecma_op_create_object_object_noarg_and_set_prototype (object_prototype_p);
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} /* ecma_op_create_object_object_noarg */
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/**
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* 'Object' object creation operation with one argument.
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*
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* See also: ECMA-262 v5, 15.2.2.1
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*
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* @return pointer to newly created 'Object' object
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*/
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ecma_value_t
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ecma_op_create_object_object_arg (ecma_value_t value) /**< argument of constructor */
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{
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ecma_check_value_type_is_spec_defined (value);
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if (ecma_is_value_object (value)
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|| ecma_is_value_number (value)
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|| ecma_is_value_prop_name (value)
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|| ecma_is_value_boolean (value))
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{
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/* 1.b, 1.c, 1.d */
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return ecma_op_to_object (value);
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}
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else
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{
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/* 2. */
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JERRY_ASSERT (ecma_is_value_undefined (value)
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|| ecma_is_value_null (value));
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ecma_object_t *obj_p = ecma_op_create_object_object_noarg ();
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return ecma_make_object_value (obj_p);
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}
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} /* ecma_op_create_object_object_arg */
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/**
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* Object creation operation with no arguments.
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* It sets the given prototype to the newly created object.
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*
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* See also: ECMA-262 v5, 15.2.2.1, 15.2.3.5
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*
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* @return pointer to newly created object
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*/
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ecma_object_t *
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ecma_op_create_object_object_noarg_and_set_prototype (ecma_object_t *object_prototype_p) /**< pointer to prototype of
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the object
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(can be NULL) */
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{
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ecma_object_t *obj_p = ecma_create_object (object_prototype_p, 0, ECMA_OBJECT_TYPE_GENERAL);
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/*
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* [[Class]] property of ECMA_OBJECT_TYPE_GENERAL type objects
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* without ECMA_INTERNAL_PROPERTY_CLASS internal property
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* is "Object".
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*
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* See also: ecma_object_get_class_name
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*/
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return obj_p;
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} /* ecma_op_create_object_object_noarg_and_set_prototype */
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/**
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* [[Delete]] ecma general object's operation
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*
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* See also:
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* ECMA-262 v5, 8.6.2; ECMA-262 v5, Table 8
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* ECMA-262 v5, 8.12.7
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*
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* @return ecma value
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* Returned value must be freed with ecma_free_value
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*/
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ecma_value_t
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ecma_op_general_object_delete (ecma_object_t *obj_p, /**< the object */
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ecma_string_t *property_name_p, /**< property name */
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bool is_throw) /**< flag that controls failure handling */
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{
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JERRY_ASSERT (obj_p != NULL
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&& !ecma_is_lexical_environment (obj_p));
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JERRY_ASSERT (property_name_p != NULL);
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/* 1. */
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ecma_property_ref_t property_ref;
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ecma_property_t property = ecma_op_object_get_own_property (obj_p,
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property_name_p,
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&property_ref,
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ECMA_PROPERTY_GET_NO_OPTIONS);
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/* 2. */
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if (property == ECMA_PROPERTY_TYPE_NOT_FOUND || property == ECMA_PROPERTY_TYPE_NOT_FOUND_AND_STOP)
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{
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return ECMA_VALUE_TRUE;
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}
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/* 3. */
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if (ecma_is_property_configurable (property))
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{
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/* a. */
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ecma_delete_property (obj_p, property_ref.value_p);
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/* b. */
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return ECMA_VALUE_TRUE;
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}
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/* 4. */
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if (is_throw)
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{
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return ecma_raise_type_error (ECMA_ERR_MSG ("Expected a configurable property."));
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}
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/* 5. */
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return ECMA_VALUE_FALSE;
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} /* ecma_op_general_object_delete */
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/**
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* [[DefaultValue]] ecma general object's operation
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*
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* See also:
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* ECMA-262 v5, 8.6.2; ECMA-262 v5, Table 8
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* ECMA-262 v5, 8.12.8
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*
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* @return ecma value
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* Returned value must be freed with ecma_free_value
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*/
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ecma_value_t
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ecma_op_general_object_default_value (ecma_object_t *obj_p, /**< the object */
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ecma_preferred_type_hint_t hint) /**< hint on preferred result type */
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{
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JERRY_ASSERT (obj_p != NULL
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&& !ecma_is_lexical_environment (obj_p));
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if (hint == ECMA_PREFERRED_TYPE_NO)
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{
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if (ecma_object_class_is (obj_p, LIT_MAGIC_STRING_DATE_UL))
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{
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hint = ECMA_PREFERRED_TYPE_STRING;
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}
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else
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{
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hint = ECMA_PREFERRED_TYPE_NUMBER;
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}
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}
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for (uint32_t i = 1; i <= 2; i++)
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{
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lit_magic_string_id_t function_name_id;
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if ((i == 1 && hint == ECMA_PREFERRED_TYPE_STRING)
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|| (i == 2 && hint == ECMA_PREFERRED_TYPE_NUMBER))
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{
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function_name_id = LIT_MAGIC_STRING_TO_STRING_UL;
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}
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else
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{
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function_name_id = LIT_MAGIC_STRING_VALUE_OF_UL;
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}
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ecma_value_t function_value = ecma_op_object_get_by_magic_id (obj_p, function_name_id);
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if (ECMA_IS_VALUE_ERROR (function_value))
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{
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return function_value;
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}
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ecma_value_t call_completion = ECMA_VALUE_EMPTY;
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if (ecma_op_is_callable (function_value))
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{
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ecma_object_t *func_obj_p = ecma_get_object_from_value (function_value);
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call_completion = ecma_op_function_call (func_obj_p,
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ecma_make_object_value (obj_p),
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NULL,
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0);
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}
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ecma_free_value (function_value);
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if (ECMA_IS_VALUE_ERROR (call_completion)
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|| (!ecma_is_value_empty (call_completion)
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&& !ecma_is_value_object (call_completion)))
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{
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return call_completion;
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}
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ecma_free_value (call_completion);
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}
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return ecma_raise_type_error (ECMA_ERR_MSG ("Invalid argument type in [[DefaultValue]]."));
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} /* ecma_op_general_object_default_value */
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/**
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* Special type for ecma_op_general_object_define_own_property.
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*/
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#define ECMA_PROPERTY_TYPE_GENERIC ECMA_PROPERTY_TYPE_SPECIAL
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/**
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* [[DefineOwnProperty]] ecma general object's operation
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*
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* See also:
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* ECMA-262 v5, 8.6.2; ECMA-262 v5, Table 8
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* ECMA-262 v5, 8.12.9
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*
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* @return ecma value
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* Returned value must be freed with ecma_free_value
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*/
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ecma_value_t
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ecma_op_general_object_define_own_property (ecma_object_t *object_p, /**< the object */
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ecma_string_t *property_name_p, /**< property name */
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const ecma_property_descriptor_t *property_desc_p, /**< property
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* descriptor */
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bool is_throw) /**< flag that controls failure handling */
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{
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JERRY_ASSERT (object_p != NULL
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&& !ecma_is_lexical_environment (object_p));
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JERRY_ASSERT (property_name_p != NULL);
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ecma_property_types_t property_desc_type = ECMA_PROPERTY_TYPE_GENERIC;
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if (property_desc_p->is_value_defined
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|| property_desc_p->is_writable_defined)
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{
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/* A property descriptor cannot be both named data and named accessor. */
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JERRY_ASSERT (!property_desc_p->is_get_defined
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&& !property_desc_p->is_set_defined);
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property_desc_type = ECMA_PROPERTY_TYPE_NAMEDDATA;
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}
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else if (property_desc_p->is_get_defined
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|| property_desc_p->is_set_defined)
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{
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property_desc_type = ECMA_PROPERTY_TYPE_NAMEDACCESSOR;
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}
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/* These three asserts ensures that a new property is created with the appropriate default flags.
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* E.g. if is_configurable_defined is false, the newly created property must be non-configurable. */
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JERRY_ASSERT (property_desc_p->is_configurable_defined || !property_desc_p->is_configurable);
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JERRY_ASSERT (property_desc_p->is_enumerable_defined || !property_desc_p->is_enumerable);
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JERRY_ASSERT (property_desc_p->is_writable_defined || !property_desc_p->is_writable);
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/* 1. */
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ecma_extended_property_ref_t ext_property_ref = { .property_ref.value_p = NULL, .property_p = NULL };
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ecma_property_t current_prop;
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current_prop = ecma_op_object_get_own_property (object_p,
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property_name_p,
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&ext_property_ref.property_ref,
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ECMA_PROPERTY_GET_VALUE | ECMA_PROPERTY_GET_EXT_REFERENCE);
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if (current_prop == ECMA_PROPERTY_TYPE_NOT_FOUND || current_prop == ECMA_PROPERTY_TYPE_NOT_FOUND_AND_STOP)
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{
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/* 3. */
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if (!ecma_get_object_extensible (object_p))
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{
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/* 2. */
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return ecma_reject (is_throw);
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}
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/* 4. */
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if (property_desc_type != ECMA_PROPERTY_TYPE_NAMEDACCESSOR)
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{
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/* a. */
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JERRY_ASSERT (property_desc_type == ECMA_PROPERTY_TYPE_GENERIC
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|| property_desc_type == ECMA_PROPERTY_TYPE_NAMEDDATA);
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uint8_t prop_attributes = 0;
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if (property_desc_p->is_configurable)
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{
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prop_attributes = (uint8_t) (prop_attributes | ECMA_PROPERTY_FLAG_CONFIGURABLE);
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}
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if (property_desc_p->is_enumerable)
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{
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prop_attributes = (uint8_t) (prop_attributes | ECMA_PROPERTY_FLAG_ENUMERABLE);
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}
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if (property_desc_p->is_writable)
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{
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prop_attributes = (uint8_t) (prop_attributes | ECMA_PROPERTY_FLAG_WRITABLE);
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}
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ecma_property_value_t *new_prop_value_p = ecma_create_named_data_property (object_p,
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property_name_p,
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prop_attributes,
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NULL);
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JERRY_ASSERT (property_desc_p->is_value_defined
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|| ecma_is_value_undefined (property_desc_p->value));
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new_prop_value_p->value = ecma_copy_value_if_not_object (property_desc_p->value);
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}
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else
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{
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/* b. */
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uint8_t prop_attributes = 0;
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if (property_desc_p->is_configurable)
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{
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prop_attributes = (uint8_t) (prop_attributes | ECMA_PROPERTY_FLAG_CONFIGURABLE);
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}
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if (property_desc_p->is_enumerable)
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{
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prop_attributes = (uint8_t) (prop_attributes | ECMA_PROPERTY_FLAG_ENUMERABLE);
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}
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ecma_create_named_accessor_property (object_p,
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property_name_p,
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property_desc_p->get_p,
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property_desc_p->set_p,
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prop_attributes,
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NULL);
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}
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return ECMA_VALUE_TRUE;
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}
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/* 6. */
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ecma_property_types_t current_property_type = ECMA_PROPERTY_GET_TYPE (current_prop);
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const bool is_current_configurable = ecma_is_property_configurable (current_prop);
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JERRY_ASSERT (current_property_type == ECMA_PROPERTY_TYPE_NAMEDDATA
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|| current_property_type == ECMA_PROPERTY_TYPE_NAMEDACCESSOR
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|| current_property_type == ECMA_PROPERTY_TYPE_VIRTUAL);
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/* 7. a., b. */
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if (!is_current_configurable
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&& (property_desc_p->is_configurable
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|| (property_desc_p->is_enumerable_defined
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&& (property_desc_p->is_enumerable != ecma_is_property_enumerable (current_prop)))))
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{
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if (current_property_type == ECMA_PROPERTY_TYPE_VIRTUAL)
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{
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ecma_free_value (ext_property_ref.property_ref.virtual_value);
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}
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return ecma_reject (is_throw);
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}
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if (current_property_type == ECMA_PROPERTY_TYPE_VIRTUAL)
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{
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JERRY_ASSERT (!is_current_configurable && !ecma_is_property_writable (current_prop));
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ecma_value_t result = ECMA_VALUE_TRUE;
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if (property_desc_type == ECMA_PROPERTY_TYPE_NAMEDACCESSOR
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|| property_desc_p->is_writable
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|| (property_desc_p->is_value_defined
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&& !ecma_op_same_value (property_desc_p->value,
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ext_property_ref.property_ref.virtual_value)))
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{
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result = ecma_reject (is_throw);
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}
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ecma_free_value (ext_property_ref.property_ref.virtual_value);
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return result;
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}
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/* 8. */
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if (property_desc_type == ECMA_PROPERTY_TYPE_GENERIC)
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{
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/* No action required. */
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}
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else if (JERRY_LIKELY (property_desc_type == current_property_type))
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{
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/* If property is configurable, there is no need for checks. */
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if (JERRY_UNLIKELY (!is_current_configurable))
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{
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if (property_desc_type == ECMA_PROPERTY_TYPE_NAMEDDATA)
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{
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/* 10. a. i. & ii. */
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if (!ecma_is_property_writable (current_prop)
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&& (property_desc_p->is_writable
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|| (property_desc_p->is_value_defined
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&& !ecma_op_same_value (property_desc_p->value,
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ext_property_ref.property_ref.value_p->value))))
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{
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return ecma_reject (is_throw);
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}
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}
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else
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{
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/* 11. */
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/* a. */
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ecma_property_value_t *value_p = ext_property_ref.property_ref.value_p;
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ecma_getter_setter_pointers_t *get_set_pair_p = ecma_get_named_accessor_property (value_p);
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jmem_cpointer_t prop_desc_getter_cp, prop_desc_setter_cp;
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ECMA_SET_POINTER (prop_desc_getter_cp, property_desc_p->get_p);
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ECMA_SET_POINTER (prop_desc_setter_cp, property_desc_p->set_p);
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if ((property_desc_p->is_get_defined
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&& prop_desc_getter_cp != get_set_pair_p->getter_cp)
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|| (property_desc_p->is_set_defined
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&& prop_desc_setter_cp != get_set_pair_p->setter_cp))
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{
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/* i., ii. */
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return ecma_reject (is_throw);
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}
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}
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}
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}
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else
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{
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/* 9. */
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if (!is_current_configurable)
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{
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/* a. */
|
|
return ecma_reject (is_throw);
|
|
}
|
|
|
|
ecma_property_value_t *value_p = ext_property_ref.property_ref.value_p;
|
|
|
|
if (property_desc_type == ECMA_PROPERTY_TYPE_NAMEDACCESSOR)
|
|
{
|
|
JERRY_ASSERT (current_property_type == ECMA_PROPERTY_TYPE_NAMEDDATA);
|
|
ecma_free_value_if_not_object (value_p->value);
|
|
|
|
#if ENABLED (JERRY_CPOINTER_32_BIT)
|
|
ecma_getter_setter_pointers_t *getter_setter_pair_p;
|
|
getter_setter_pair_p = jmem_pools_alloc (sizeof (ecma_getter_setter_pointers_t));
|
|
getter_setter_pair_p->getter_cp = JMEM_CP_NULL;
|
|
getter_setter_pair_p->setter_cp = JMEM_CP_NULL;
|
|
ECMA_SET_NON_NULL_POINTER (value_p->getter_setter_pair_cp, getter_setter_pair_p);
|
|
#else /* !ENABLED (JERRY_CPOINTER_32_BIT) */
|
|
value_p->getter_setter_pair.getter_cp = JMEM_CP_NULL;
|
|
value_p->getter_setter_pair.setter_cp = JMEM_CP_NULL;
|
|
#endif /* ENABLED (JERRY_CPOINTER_32_BIT) */
|
|
}
|
|
else
|
|
{
|
|
JERRY_ASSERT (current_property_type == ECMA_PROPERTY_TYPE_NAMEDACCESSOR);
|
|
#if ENABLED (JERRY_CPOINTER_32_BIT)
|
|
ecma_getter_setter_pointers_t *getter_setter_pair_p;
|
|
getter_setter_pair_p = ECMA_GET_NON_NULL_POINTER (ecma_getter_setter_pointers_t,
|
|
value_p->getter_setter_pair_cp);
|
|
jmem_pools_free (getter_setter_pair_p, sizeof (ecma_getter_setter_pointers_t));
|
|
#endif /* ENABLED (JERRY_CPOINTER_32_BIT) */
|
|
value_p->value = ECMA_VALUE_UNDEFINED;
|
|
}
|
|
|
|
/* Update flags */
|
|
ecma_property_t prop_flags = *(ext_property_ref.property_p);
|
|
prop_flags = (ecma_property_t) (prop_flags & ~(ECMA_PROPERTY_TYPE_MASK | ECMA_PROPERTY_FLAG_WRITABLE));
|
|
prop_flags = (ecma_property_t) (prop_flags | property_desc_type);
|
|
*(ext_property_ref.property_p) = prop_flags;
|
|
}
|
|
|
|
/* 12. */
|
|
if (property_desc_type == ECMA_PROPERTY_TYPE_NAMEDDATA)
|
|
{
|
|
JERRY_ASSERT (ECMA_PROPERTY_GET_TYPE (*ext_property_ref.property_p) == ECMA_PROPERTY_TYPE_NAMEDDATA);
|
|
|
|
if (property_desc_p->is_value_defined)
|
|
{
|
|
ecma_named_data_property_assign_value (object_p,
|
|
ext_property_ref.property_ref.value_p,
|
|
property_desc_p->value);
|
|
}
|
|
|
|
if (property_desc_p->is_writable_defined)
|
|
{
|
|
ecma_set_property_writable_attr (ext_property_ref.property_p, property_desc_p->is_writable);
|
|
}
|
|
}
|
|
else if (property_desc_type == ECMA_PROPERTY_TYPE_NAMEDACCESSOR)
|
|
{
|
|
JERRY_ASSERT (ECMA_PROPERTY_GET_TYPE (*ext_property_ref.property_p) == ECMA_PROPERTY_TYPE_NAMEDACCESSOR);
|
|
|
|
if (property_desc_p->is_get_defined)
|
|
{
|
|
ecma_set_named_accessor_property_getter (object_p,
|
|
ext_property_ref.property_ref.value_p,
|
|
property_desc_p->get_p);
|
|
}
|
|
|
|
if (property_desc_p->is_set_defined)
|
|
{
|
|
ecma_set_named_accessor_property_setter (object_p,
|
|
ext_property_ref.property_ref.value_p,
|
|
property_desc_p->set_p);
|
|
}
|
|
}
|
|
|
|
if (property_desc_p->is_enumerable_defined)
|
|
{
|
|
ecma_set_property_enumerable_attr (ext_property_ref.property_p, property_desc_p->is_enumerable);
|
|
}
|
|
|
|
if (property_desc_p->is_configurable_defined)
|
|
{
|
|
ecma_set_property_configurable_attr (ext_property_ref.property_p, property_desc_p->is_configurable);
|
|
}
|
|
|
|
return ECMA_VALUE_TRUE;
|
|
} /* ecma_op_general_object_define_own_property */
|
|
|
|
#undef ECMA_PROPERTY_TYPE_GENERIC
|
|
|
|
/**
|
|
* @}
|
|
* @}
|
|
*/
|