mirror of
https://github.com/jerryscript-project/jerryscript.git
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51e3c4455a
Direct strings are a new type of direct ecma-values (no memory allocation is needed for encoding them) in JerryScript. Currently magic strings, external magic strings and uint values are encoded as direct strings. The constant pool of JerryScript byte-code is changed to hold ecma-values rather than cpointers to support direct strings. JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
370 lines
12 KiB
C
370 lines
12 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-alloc.h"
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#include "ecma-builtin-helpers.h"
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#include "ecma-builtins.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-lcache.h"
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#include "ecma-lex-env.h"
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#include "ecma-objects.h"
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#include "ecma-objects-arguments.h"
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#include "ecma-objects-general.h"
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#include "ecma-try-catch-macro.h"
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#include "jrt.h"
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/** \addtogroup ecma ECMA
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* @{
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*
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* \addtogroup ecmafunctionobject ECMA Function object related routines
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* @{
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*/
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/**
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* Arguments object creation operation.
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*
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* See also: ECMA-262 v5, 10.6
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*/
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void
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ecma_op_create_arguments_object (ecma_object_t *func_obj_p, /**< callee function */
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ecma_object_t *lex_env_p, /**< lexical environment the Arguments
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object is created for */
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const ecma_value_t *arguments_list_p, /**< arguments list */
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ecma_length_t arguments_number, /**< length of arguments list */
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const ecma_compiled_code_t *bytecode_data_p) /**< byte code */
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{
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bool is_strict = (bytecode_data_p->status_flags & CBC_CODE_FLAGS_STRICT_MODE) != 0;
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ecma_length_t formal_params_number;
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if (bytecode_data_p->status_flags & CBC_CODE_FLAGS_UINT16_ARGUMENTS)
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{
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cbc_uint16_arguments_t *args_p = (cbc_uint16_arguments_t *) bytecode_data_p;
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formal_params_number = args_p->argument_end;
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}
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else
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{
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cbc_uint8_arguments_t *args_p = (cbc_uint8_arguments_t *) bytecode_data_p;
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formal_params_number = args_p->argument_end;
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}
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ecma_object_t *prototype_p = ecma_builtin_get (ECMA_BUILTIN_ID_OBJECT_PROTOTYPE);
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ecma_object_t *obj_p;
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if (!is_strict && arguments_number > 0 && formal_params_number > 0)
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{
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size_t formal_params_size = formal_params_number * sizeof (ecma_value_t);
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obj_p = ecma_create_object (prototype_p,
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sizeof (ecma_extended_object_t) + formal_params_size,
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ECMA_OBJECT_TYPE_PSEUDO_ARRAY);
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ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) obj_p;
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ext_object_p->u.pseudo_array.type = ECMA_PSEUDO_ARRAY_ARGUMENTS;
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ECMA_SET_INTERNAL_VALUE_POINTER (ext_object_p->u.pseudo_array.u2.lex_env_cp, lex_env_p);
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ext_object_p->u.pseudo_array.u1.length = (uint16_t) formal_params_number;
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ecma_value_t *arg_Literal_p = (ecma_value_t *) (ext_object_p + 1);
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uint8_t *byte_p = (uint8_t *) bytecode_data_p;
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byte_p += ((size_t) bytecode_data_p->size) << JMEM_ALIGNMENT_LOG;
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byte_p -= formal_params_size;
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memcpy (arg_Literal_p, byte_p, formal_params_size);
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for (ecma_length_t i = 0; i < formal_params_number; i++)
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{
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if (arg_Literal_p[i] != ECMA_VALUE_EMPTY)
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{
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ecma_string_t *name_p = ecma_get_string_from_value (arg_Literal_p[i]);
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ecma_ref_ecma_string (name_p);
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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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obj_p = ecma_create_object (prototype_p, sizeof (ecma_extended_object_t), ECMA_OBJECT_TYPE_CLASS);
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ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) obj_p;
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ext_object_p->u.class_prop.class_id = LIT_MAGIC_STRING_ARGUMENTS_UL;
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}
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ecma_deref_object (prototype_p);
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ecma_property_value_t *prop_value_p;
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/* 11.a, 11.b */
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for (ecma_length_t indx = 0;
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indx < arguments_number;
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indx++)
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{
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ecma_string_t *indx_string_p = ecma_new_ecma_string_from_uint32 (indx);
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prop_value_p = ecma_create_named_data_property (obj_p,
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indx_string_p,
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ECMA_PROPERTY_CONFIGURABLE_ENUMERABLE_WRITABLE,
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NULL);
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prop_value_p->value = ecma_copy_value_if_not_object (arguments_list_p[indx]);
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ecma_deref_ecma_string (indx_string_p);
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}
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/* 7. */
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ecma_string_t *length_magic_string_p = ecma_new_ecma_length_string ();
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prop_value_p = ecma_create_named_data_property (obj_p,
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length_magic_string_p,
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ECMA_PROPERTY_CONFIGURABLE_WRITABLE,
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NULL);
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prop_value_p->value = ecma_make_uint32_value (arguments_number);
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ecma_deref_ecma_string (length_magic_string_p);
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ecma_property_descriptor_t prop_desc = ecma_make_empty_property_descriptor ();
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/* 13. */
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if (!is_strict)
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{
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ecma_string_t *callee_magic_string_p = ecma_get_magic_string (LIT_MAGIC_STRING_CALLEE);
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prop_value_p = ecma_create_named_data_property (obj_p,
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callee_magic_string_p,
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ECMA_PROPERTY_CONFIGURABLE_WRITABLE,
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NULL);
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prop_value_p->value = ecma_make_object_value (func_obj_p);
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ecma_deref_ecma_string (callee_magic_string_p);
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}
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else
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{
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ecma_object_t *thrower_p = ecma_builtin_get (ECMA_BUILTIN_ID_TYPE_ERROR_THROWER);
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/* 14. */
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prop_desc = ecma_make_empty_property_descriptor ();
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{
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prop_desc.is_get_defined = true;
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prop_desc.get_p = thrower_p;
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prop_desc.is_set_defined = true;
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prop_desc.set_p = thrower_p;
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prop_desc.is_enumerable_defined = true;
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prop_desc.is_enumerable = false;
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prop_desc.is_configurable_defined = true;
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prop_desc.is_configurable = false;
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}
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ecma_string_t *callee_magic_string_p = ecma_get_magic_string (LIT_MAGIC_STRING_CALLEE);
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ecma_value_t completion = ecma_op_object_define_own_property (obj_p,
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callee_magic_string_p,
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&prop_desc,
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false);
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JERRY_ASSERT (ecma_is_value_true (completion));
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ecma_deref_ecma_string (callee_magic_string_p);
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ecma_string_t *caller_magic_string_p = ecma_get_magic_string (LIT_MAGIC_STRING_CALLER);
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completion = ecma_op_object_define_own_property (obj_p,
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caller_magic_string_p,
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&prop_desc,
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false);
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JERRY_ASSERT (ecma_is_value_true (completion));
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ecma_deref_ecma_string (caller_magic_string_p);
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ecma_deref_object (thrower_p);
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}
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ecma_string_t *arguments_string_p = ecma_get_magic_string (LIT_MAGIC_STRING_ARGUMENTS);
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if (is_strict)
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{
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ecma_op_create_immutable_binding (lex_env_p,
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arguments_string_p,
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ecma_make_object_value (obj_p));
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}
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else
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{
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ecma_value_t completion = ecma_op_create_mutable_binding (lex_env_p,
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arguments_string_p,
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false);
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JERRY_ASSERT (ecma_is_value_empty (completion));
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completion = ecma_op_set_mutable_binding (lex_env_p,
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arguments_string_p,
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ecma_make_object_value (obj_p),
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false);
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JERRY_ASSERT (ecma_is_value_empty (completion));
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}
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ecma_deref_ecma_string (arguments_string_p);
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ecma_deref_object (obj_p);
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} /* ecma_op_create_arguments_object */
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/**
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* [[DefineOwnProperty]] ecma Arguments 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, 10.6
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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_arguments_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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/* 3. */
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ecma_value_t ret_value = ecma_op_general_object_define_own_property (object_p,
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property_name_p,
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property_desc_p,
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is_throw);
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if (ECMA_IS_VALUE_ERROR (ret_value))
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{
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return ret_value;
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}
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uint32_t index = ecma_string_get_array_index (property_name_p);
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if (index == ECMA_STRING_NOT_ARRAY_INDEX)
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{
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return ret_value;
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}
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ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) object_p;
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if (index >= ext_object_p->u.pseudo_array.u1.length)
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{
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return ret_value;
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}
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ecma_value_t *arg_Literal_p = (ecma_value_t *) (ext_object_p + 1);
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if (arg_Literal_p[index] == ECMA_VALUE_EMPTY)
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{
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return ret_value;
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}
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ecma_string_t *name_p = ecma_get_string_from_value (arg_Literal_p[index]);
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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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ecma_deref_ecma_string (name_p);
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arg_Literal_p[index] = ECMA_VALUE_EMPTY;
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}
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else
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{
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if (property_desc_p->is_value_defined)
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{
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/* emulating execution of function described by MakeArgSetter */
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ecma_object_t *lex_env_p = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_object_t,
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ext_object_p->u.pseudo_array.u2.lex_env_cp);
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ecma_value_t completion = ecma_op_set_mutable_binding (lex_env_p,
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name_p,
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property_desc_p->value,
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true);
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JERRY_ASSERT (ecma_is_value_empty (completion));
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}
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if (property_desc_p->is_writable_defined
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&& !property_desc_p->is_writable)
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{
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ecma_deref_ecma_string (name_p);
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arg_Literal_p[index] = ECMA_VALUE_EMPTY;
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}
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}
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return ret_value;
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} /* ecma_op_arguments_object_define_own_property */
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/**
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* [[Delete]] ecma Arguments 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, 10.6
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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_arguments_object_delete (ecma_object_t *object_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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/* 3. */
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ecma_value_t ret_value = ecma_op_general_object_delete (object_p, property_name_p, is_throw);
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if (ECMA_IS_VALUE_ERROR (ret_value))
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{
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return ret_value;
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}
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JERRY_ASSERT (ecma_is_value_boolean (ret_value));
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if (ecma_is_value_true (ret_value))
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{
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uint32_t index = ecma_string_get_array_index (property_name_p);
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if (index != ECMA_STRING_NOT_ARRAY_INDEX)
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{
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ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) object_p;
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if (index < ext_object_p->u.pseudo_array.u1.length)
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{
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ecma_value_t *arg_Literal_p = (ecma_value_t *) (ext_object_p + 1);
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if (arg_Literal_p[index] != ECMA_VALUE_EMPTY)
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{
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ecma_string_t *name_p = ecma_get_string_from_value (arg_Literal_p[index]);
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ecma_deref_ecma_string (name_p);
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arg_Literal_p[index] = ECMA_VALUE_EMPTY;
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}
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}
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}
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ret_value = ECMA_VALUE_TRUE;
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}
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return ret_value;
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} /* ecma_op_arguments_object_delete */
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/**
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* @}
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* @}
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*/
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