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jerryscript/jerry-core/ecma/operations/ecma-function-object.c
Péter Gál 61d172aaaf
Don't use property list pointer to store Proxy flags (#4415) 
Proxy flags (IsCallable, IsConstructor) can't be stored on the
property list compressed pointer. As adding a Proxy to a WeakSet
would add a property to the Proxy object causing failures down the line.

The prototype internal "slot" can be used to store there flags as
it is not used in case of Proxies (as per standard).

JerryScript-DCO-1.0-Signed-off-by: Peter Gal pgal.usz@partner.samsung.com
2021-01-07 11:53:59 +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-builtin-helpers.h"
#include "ecma-builtin-handlers.h"
#include "ecma-exceptions.h"
#include "ecma-function-object.h"
#include "ecma-gc.h"
#include "ecma-helpers.h"
#include "ecma-promise-object.h"
#include "lit-char-helpers.h"
#include "ecma-lex-env.h"
#include "ecma-objects.h"
#include "ecma-objects-general.h"
#include "ecma-proxy-object.h"
#include "ecma-symbol-object.h"
#include "jcontext.h"
/** \addtogroup ecma ECMA
* @{
*
* \addtogroup ecmafunctionobject ECMA Function object related routines
* @{
*/
#if ENABLED (JERRY_ESNEXT)
/**
* SetFunctionName operation
*
* See also: ECMAScript v6, 9.2.1.1
*
* @return resource name as ecma-string
*/
ecma_value_t
ecma_op_function_form_name (ecma_string_t *prop_name_p, /**< property name */
char *prefix_p, /**< prefix */
lit_utf8_size_t prefix_size) /**< prefix length */
{
/* 4. */
if (ecma_prop_name_is_symbol (prop_name_p))
{
/* .a */
ecma_value_t string_desc = ecma_get_symbol_description (prop_name_p);
/* .b */
if (ecma_is_value_undefined (string_desc))
{
prop_name_p = ecma_get_magic_string (LIT_MAGIC_STRING__EMPTY);
}
/* .c */
else
{
ecma_string_t *string_desc_p = ecma_get_string_from_value (string_desc);
ecma_stringbuilder_t builder = ecma_stringbuilder_create_raw ((lit_utf8_byte_t *) "[", 1);
ecma_stringbuilder_append (&builder, string_desc_p);
ecma_stringbuilder_append_byte (&builder, (lit_utf8_byte_t) LIT_CHAR_RIGHT_SQUARE);
prop_name_p = ecma_stringbuilder_finalize (&builder);
}
}
else
{
ecma_ref_ecma_string (prop_name_p);
}
/* 5. */
if (JERRY_UNLIKELY (prefix_p != NULL))
{
ecma_stringbuilder_t builder = ecma_stringbuilder_create_raw ((lit_utf8_byte_t *) prefix_p, prefix_size);
ecma_stringbuilder_append (&builder, prop_name_p);
ecma_deref_ecma_string (prop_name_p);
prop_name_p = ecma_stringbuilder_finalize (&builder);
}
return ecma_make_string_value (prop_name_p);
} /* ecma_op_function_form_name */
#endif /* ENABLED (JERRY_ESNEXT) */
/**
* IsCallable operation.
*
* See also: ECMA-262 v5, 9.11
*
* @return true - if the given object is callable;
* false - otherwise
*/
inline bool JERRY_ATTR_ALWAYS_INLINE
ecma_op_object_is_callable (ecma_object_t *obj_p) /**< ecma object */
{
JERRY_ASSERT (!ecma_is_lexical_environment (obj_p));
const ecma_object_type_t type = ecma_get_object_type (obj_p);
#if ENABLED (JERRY_BUILTIN_PROXY)
if (ECMA_OBJECT_TYPE_IS_PROXY (type))
{
return ECMA_GET_FIRST_BIT_FROM_POINTER_TAG (obj_p->u2.prototype_cp) != 0;
}
#endif /* ENABLED (JERRY_BUILTIN_PROXY) */
return type >= ECMA_OBJECT_TYPE_FUNCTION;
} /* ecma_op_object_is_callable */
/**
* IsCallable operation.
*
* See also: ECMA-262 v5, 9.11
*
* @return true - if value is callable object;
* false - otherwise
*/
bool
ecma_op_is_callable (ecma_value_t value) /**< ecma value */
{
return (ecma_is_value_object (value)
&& ecma_op_object_is_callable (ecma_get_object_from_value (value)));
} /* ecma_op_is_callable */
/**
* Implement IsConstructor abstract operation.
*
*
* @return ECMA_IS_VALID_CONSTRUCTOR - if object is a valid for constructor call
* any other value - if object is not a valid constructor, the pointer contains the error message.
*/
char *
ecma_object_check_constructor (ecma_object_t *obj_p) /**< ecma object */
{
JERRY_ASSERT (!ecma_is_lexical_environment (obj_p));
ecma_object_type_t type = ecma_get_object_type (obj_p);
if (JERRY_UNLIKELY (type < ECMA_OBJECT_TYPE_PROXY))
{
return ECMA_ERR_MSG ("Invalid type for constructor call.");
}
while (JERRY_UNLIKELY (type == ECMA_OBJECT_TYPE_BOUND_FUNCTION))
{
ecma_bound_function_t *bound_func_p = (ecma_bound_function_t *) obj_p;
obj_p = ECMA_GET_NON_NULL_POINTER_FROM_POINTER_TAG (ecma_object_t,
bound_func_p->header.u.bound_function.target_function);
type = ecma_get_object_type (obj_p);
}
if (JERRY_LIKELY (type == ECMA_OBJECT_TYPE_FUNCTION))
{
JERRY_ASSERT (!ecma_get_object_is_builtin (obj_p));
#if ENABLED (JERRY_ESNEXT)
const ecma_compiled_code_t *byte_code_p = ecma_op_function_get_compiled_code ((ecma_extended_object_t *) obj_p);
if (!CBC_FUNCTION_IS_CONSTRUCTABLE (byte_code_p->status_flags))
{
#if ENABLED (JERRY_ERROR_MESSAGES)
switch (CBC_FUNCTION_GET_TYPE (byte_code_p->status_flags))
{
case CBC_FUNCTION_SCRIPT:
{
return "Script (global) functions cannot be invoked with 'new'.";
}
case CBC_FUNCTION_GENERATOR:
{
return "Generator functions cannot be invoked with 'new'.";
}
case CBC_FUNCTION_ASYNC:
{
return "Async functions cannot be invoked with 'new'.";
}
case CBC_FUNCTION_ASYNC_GENERATOR:
{
return "Async generator functions cannot be invoked with 'new'.";
}
case CBC_FUNCTION_ACCESSOR:
{
return "Accessor functions cannot be invoked with 'new'.";
}
case CBC_FUNCTION_METHOD:
{
return "Methods cannot be invoked with 'new'.";
}
case CBC_FUNCTION_ARROW:
{
return "Arrow functions cannot be invoked with 'new'.";
}
default:
{
JERRY_ASSERT (CBC_FUNCTION_GET_TYPE (byte_code_p->status_flags) == CBC_FUNCTION_ASYNC_ARROW);
return "Async arrow functions cannot be invoked with 'new'.";
}
}
#else /* !ENABLED (JERRY_ERROR_MESSAGES) */
return NULL;
#endif /* ENABLED (JERRY_ERROR_MESSAGES) */
}
#endif /* ENABLED (JERRY_NEXT) */
return ECMA_IS_VALID_CONSTRUCTOR;
}
#if ENABLED (JERRY_BUILTIN_PROXY)
if (ECMA_OBJECT_TYPE_IS_PROXY (type))
{
if (ECMA_GET_SECOND_BIT_FROM_POINTER_TAG (obj_p->u2.prototype_cp) == 0)
{
return ECMA_ERR_MSG ("Proxy target is not a constructor.");
}
return ECMA_IS_VALID_CONSTRUCTOR;
}
#endif /* ENABLED (JERRY_BUILTIN_PROXY) */
JERRY_ASSERT (type == ECMA_OBJECT_TYPE_NATIVE_FUNCTION);
if (ecma_get_object_is_builtin (obj_p))
{
if (ecma_builtin_function_is_routine (obj_p))
{
return ECMA_ERR_MSG ("Built-in routines are not constructors.");
}
#if ENABLED (JERRY_ESNEXT)
JERRY_ASSERT (((ecma_extended_object_t *) obj_p)->u.built_in.id != ECMA_BUILTIN_ID_HANDLER);
#endif /* !ENABLED (JERRY_ESNEXT) */
}
return ECMA_IS_VALID_CONSTRUCTOR;
} /* ecma_object_check_constructor */
/**
* Implement IsConstructor abstract operation.
*
* @return ECMA_IS_VALID_CONSTRUCTOR - if the input value is a constructor.
* any other value - if the input value is not a valid constructor, the pointer contains the error message.
*/
inline char *JERRY_ATTR_ALWAYS_INLINE
ecma_check_constructor (ecma_value_t value) /**< ecma object */
{
if (!ecma_is_value_object (value))
{
return ECMA_ERR_MSG ("Invalid type for constructor call.");
}
return ecma_object_check_constructor (ecma_get_object_from_value (value));
} /* ecma_check_constructor */
/**
* Checks whether the given object implements [[Construct]].
*
* @return true - if the given object is constructor;
* false - otherwise
*/
inline bool JERRY_ATTR_ALWAYS_INLINE
ecma_object_is_constructor (ecma_object_t *obj_p) /**< ecma object */
{
return ecma_object_check_constructor (obj_p) == ECMA_IS_VALID_CONSTRUCTOR;
} /* ecma_object_is_constructor */
/**
* Checks whether the value is Object that implements [[Construct]].
*
* @return true - if value is constructor object;
* false - otherwise
*/
bool
ecma_is_constructor (ecma_value_t value) /**< ecma value */
{
return (ecma_is_value_object (value)
&& ecma_object_is_constructor (ecma_get_object_from_value (value)));
} /* ecma_is_constructor */
/**
* Helper method to count and convert the arguments for the Function/GeneratorFunction constructor call.
*
* See also:
* ECMA 262 v5.1 15.3.2.1 steps 5.a-d
* ECMA 262 v6 19.2.1.1.1 steps 8
*
* @return ecma value - concatenated arguments as a string.
* Returned value must be freed with ecma_free_value.
*/
static ecma_string_t *
ecma_op_create_dynamic_function_arguments_helper (const ecma_value_t *arguments_list_p, /**< arguments list */
uint32_t arguments_list_len) /**< number of arguments */
{
JERRY_ASSERT (arguments_list_len == 0 || arguments_list_p != NULL);
if (arguments_list_len <= 1)
{
return ecma_get_magic_string (LIT_MAGIC_STRING__EMPTY);
}
ecma_string_t *str_p = ecma_op_to_string (arguments_list_p[0]);
if (JERRY_UNLIKELY (str_p == NULL))
{
return str_p;
}
if (arguments_list_len == 2)
{
return str_p;
}
ecma_stringbuilder_t builder = ecma_stringbuilder_create_from (str_p);
ecma_deref_ecma_string (str_p);
for (uint32_t idx = 1; idx < arguments_list_len - 1; idx++)
{
str_p = ecma_op_to_string (arguments_list_p[idx]);
if (JERRY_UNLIKELY (str_p == NULL))
{
ecma_stringbuilder_destroy (&builder);
return str_p;
}
ecma_stringbuilder_append_char (&builder, LIT_CHAR_COMMA);
ecma_stringbuilder_append (&builder, str_p);
ecma_deref_ecma_string (str_p);
}
return ecma_stringbuilder_finalize (&builder);
} /* ecma_op_create_dynamic_function_arguments_helper */
/**
* Function object creation operation.
*
* See also: ECMA-262 v5, 13.2
*
* @return pointer to newly created Function object
*/
static ecma_object_t *
ecma_op_create_function_object (ecma_object_t *scope_p, /**< function's scope */
const ecma_compiled_code_t *bytecode_data_p, /**< byte-code array */
ecma_builtin_id_t proto_id) /**< builtin id of the prototype object */
{
JERRY_ASSERT (ecma_is_lexical_environment (scope_p));
/* 1., 4., 13. */
ecma_object_t *prototype_obj_p = ecma_builtin_get (proto_id);
size_t function_object_size = sizeof (ecma_extended_object_t);
#if ENABLED (JERRY_SNAPSHOT_EXEC)
if (bytecode_data_p->status_flags & CBC_CODE_FLAGS_STATIC_FUNCTION)
{
function_object_size = sizeof (ecma_static_function_t);
}
#endif /* ENABLED (JERRY_SNAPSHOT_EXEC) */
ecma_object_t *func_p = ecma_create_object (prototype_obj_p,
function_object_size,
ECMA_OBJECT_TYPE_FUNCTION);
/* 2., 6., 7., 8. */
/*
* We don't setup [[Get]], [[Call]], [[Construct]], [[HasInstance]] for each function object.
* Instead we set the object's type to ECMA_OBJECT_TYPE_FUNCTION
* that defines which version of the routine should be used on demand.
*/
/* 3. */
/*
* [[Class]] property is not stored explicitly for objects of ECMA_OBJECT_TYPE_FUNCTION type.
*
* See also: ecma_object_get_class_name
*/
ecma_extended_object_t *ext_func_p = (ecma_extended_object_t *) func_p;
/* 9. */
ECMA_SET_NON_NULL_POINTER_TAG (ext_func_p->u.function.scope_cp, scope_p, 0);
/* 10., 11., 12. */
#if ENABLED (JERRY_SNAPSHOT_EXEC)
if (bytecode_data_p->status_flags & CBC_CODE_FLAGS_STATIC_FUNCTION)
{
ext_func_p->u.function.bytecode_cp = JMEM_CP_NULL;
((ecma_static_function_t *) func_p)->bytecode_p = bytecode_data_p;
}
else
#endif /* ENABLED (JERRY_SNAPSHOT_EXEC) */
{
ECMA_SET_INTERNAL_VALUE_POINTER (ext_func_p->u.function.bytecode_cp, bytecode_data_p);
ecma_bytecode_ref ((ecma_compiled_code_t *) bytecode_data_p);
}
/* 14., 15., 16., 17., 18. */
/*
* 'length' and 'prototype' properties are instantiated lazily
*
* See also: ecma_op_function_try_to_lazy_instantiate_property
*/
return func_p;
} /* ecma_op_create_function_object */
/**
* CreateDynamicFunction operation
*
* See also:
* ECMA-262 v5, 15.3.
* ECMA-262 v6, 19.2.1.1
*
* @return ECMA_VALUE_ERROR - if the operation fails
* constructed function object - otherwise
*/
ecma_value_t
ecma_op_create_dynamic_function (const ecma_value_t *arguments_list_p, /**< arguments list */
uint32_t arguments_list_len, /**< number of arguments */
ecma_parse_opts_t parse_opts) /**< parse options */
{
JERRY_ASSERT (arguments_list_len == 0 || arguments_list_p != NULL);
ecma_string_t *arguments_str_p = ecma_op_create_dynamic_function_arguments_helper (arguments_list_p,
arguments_list_len);
if (JERRY_UNLIKELY (arguments_str_p == NULL))
{
return ECMA_VALUE_ERROR;
}
ecma_string_t *function_body_str_p;
if (arguments_list_len > 0)
{
function_body_str_p = ecma_op_to_string (arguments_list_p[arguments_list_len - 1]);
if (JERRY_UNLIKELY (function_body_str_p == NULL))
{
ecma_deref_ecma_string (arguments_str_p);
return ECMA_VALUE_ERROR;
}
}
else
{
/* Very unlikely code path, not optimized. */
function_body_str_p = ecma_get_magic_string (LIT_MAGIC_STRING__EMPTY);
}
ECMA_STRING_TO_UTF8_STRING (arguments_str_p, arguments_buffer_p, arguments_buffer_size);
ECMA_STRING_TO_UTF8_STRING (function_body_str_p, function_body_buffer_p, function_body_buffer_size);
ecma_value_t resource_name = ecma_make_magic_string_value (LIT_MAGIC_STRING_RESOURCE_ANON);
ecma_compiled_code_t *bytecode_p = parser_parse_script (arguments_buffer_p,
arguments_buffer_size,
function_body_buffer_p,
function_body_buffer_size,
resource_name,
parse_opts);
ECMA_FINALIZE_UTF8_STRING (function_body_buffer_p, function_body_buffer_size);
ECMA_FINALIZE_UTF8_STRING (arguments_buffer_p, arguments_buffer_size);
ecma_deref_ecma_string (arguments_str_p);
ecma_deref_ecma_string (function_body_str_p);
if (JERRY_UNLIKELY (bytecode_p == NULL))
{
return ECMA_VALUE_ERROR;
}
#if ENABLED (JERRY_ESNEXT)
ecma_value_t *func_name_p;
func_name_p = ecma_compiled_code_resolve_function_name ((const ecma_compiled_code_t *) bytecode_p);
*func_name_p = ecma_make_magic_string_value (LIT_MAGIC_STRING_ANONYMOUS);
#endif /* ENABLED (JERRY_ESNEXT) */
ecma_object_t *global_object_p = ecma_builtin_get_global ();
#if ENABLED (JERRY_BUILTIN_REALMS)
JERRY_ASSERT (global_object_p == (ecma_object_t *) ecma_op_function_get_realm (bytecode_p));
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
ecma_object_t *global_env_p = ecma_get_global_environment (global_object_p);
ecma_builtin_id_t fallback_proto = ECMA_BUILTIN_ID_FUNCTION_PROTOTYPE;
#if ENABLED (JERRY_ESNEXT)
ecma_object_t *new_target_p = JERRY_CONTEXT (current_new_target);
if (JERRY_UNLIKELY (parse_opts & (ECMA_PARSE_GENERATOR_FUNCTION | ECMA_PARSE_ASYNC_FUNCTION)))
{
fallback_proto = ECMA_BUILTIN_ID_GENERATOR;
if (parse_opts & ECMA_PARSE_ASYNC_FUNCTION)
{
fallback_proto = ECMA_BUILTIN_ID_ASYNC_GENERATOR;
if (new_target_p == NULL)
{
new_target_p = ecma_builtin_get (ECMA_BUILTIN_ID_ASYNC_GENERATOR_FUNCTION);
}
}
else if (new_target_p == NULL)
{
new_target_p = ecma_builtin_get (ECMA_BUILTIN_ID_GENERATOR_FUNCTION);
}
}
else if (new_target_p == NULL)
{
new_target_p = ecma_builtin_get (ECMA_BUILTIN_ID_FUNCTION);
}
ecma_object_t *proto = ecma_op_get_prototype_from_constructor (new_target_p, fallback_proto);
if (JERRY_UNLIKELY (proto == NULL))
{
ecma_bytecode_deref (bytecode_p);
return ECMA_VALUE_ERROR;
}
#endif /* ENABLED (JERRY_ESNEXT) */
ecma_object_t *func_obj_p = ecma_op_create_function_object (global_env_p, bytecode_p, fallback_proto);
#if ENABLED (JERRY_ESNEXT)
ECMA_SET_NON_NULL_POINTER (func_obj_p->u2.prototype_cp, proto);
ecma_deref_object (proto);
#endif /* ENABLED (JERRY_ESNEXT) */
ecma_bytecode_deref (bytecode_p);
return ecma_make_object_value (func_obj_p);
} /* ecma_op_create_dynamic_function */
/**
* Function object creation operation.
*
* See also: ECMA-262 v5, 13.2
*
* @return pointer to newly created Function object
*/
ecma_object_t *
ecma_op_create_simple_function_object (ecma_object_t *scope_p, /**< function's scope */
const ecma_compiled_code_t *bytecode_data_p) /**< byte-code array */
{
return ecma_op_create_function_object (scope_p, bytecode_data_p, ECMA_BUILTIN_ID_FUNCTION_PROTOTYPE);
} /* ecma_op_create_simple_function_object */
#if ENABLED (JERRY_ESNEXT)
/**
* Create a function object with the appropriate prototype.
*
* @return pointer to newly created Function object
*/
ecma_object_t *
ecma_op_create_any_function_object (ecma_object_t *scope_p, /**< function's scope */
const ecma_compiled_code_t *bytecode_data_p) /**< byte-code array */
{
ecma_builtin_id_t proto_id;
switch (CBC_FUNCTION_GET_TYPE (bytecode_data_p->status_flags))
{
case CBC_FUNCTION_GENERATOR:
{
proto_id = ECMA_BUILTIN_ID_GENERATOR;
break;
}
case CBC_FUNCTION_ASYNC:
{
proto_id = ECMA_BUILTIN_ID_ASYNC_FUNCTION_PROTOTYPE;
break;
}
case CBC_FUNCTION_ASYNC_GENERATOR:
{
proto_id = ECMA_BUILTIN_ID_ASYNC_GENERATOR;
break;
}
default:
{
proto_id = ECMA_BUILTIN_ID_FUNCTION_PROTOTYPE;
break;
}
}
return ecma_op_create_function_object (scope_p, bytecode_data_p, proto_id);
} /* ecma_op_create_any_function_object */
/**
* Arrow function object creation operation.
*
* See also: ES2015, 9.2.12
*
* @return pointer to newly created Function object
*/
ecma_object_t *
ecma_op_create_arrow_function_object (ecma_object_t *scope_p, /**< function's scope */
const ecma_compiled_code_t *bytecode_data_p, /**< byte-code array */
ecma_value_t this_binding) /**< value of 'this' binding */
{
ecma_object_t *prototype_obj_p;
if (CBC_FUNCTION_GET_TYPE (bytecode_data_p->status_flags) == CBC_FUNCTION_ARROW)
{
prototype_obj_p = ecma_builtin_get (ECMA_BUILTIN_ID_FUNCTION_PROTOTYPE);
}
else
{
JERRY_ASSERT (CBC_FUNCTION_GET_TYPE (bytecode_data_p->status_flags) == CBC_FUNCTION_ASYNC_ARROW);
prototype_obj_p = ecma_builtin_get (ECMA_BUILTIN_ID_ASYNC_FUNCTION_PROTOTYPE);
}
size_t arrow_function_object_size = sizeof (ecma_arrow_function_t);
#if ENABLED (JERRY_SNAPSHOT_EXEC)
if (bytecode_data_p->status_flags & CBC_CODE_FLAGS_STATIC_FUNCTION)
{
arrow_function_object_size = sizeof (ecma_static_arrow_function_t);
}
#endif /* ENABLED (JERRY_SNAPSHOT_EXEC) */
ecma_object_t *func_p = ecma_create_object (prototype_obj_p,
arrow_function_object_size,
ECMA_OBJECT_TYPE_FUNCTION);
ecma_arrow_function_t *arrow_func_p = (ecma_arrow_function_t *) func_p;
ECMA_SET_NON_NULL_POINTER_TAG (arrow_func_p->header.u.function.scope_cp, scope_p, 0);
#if ENABLED (JERRY_SNAPSHOT_EXEC)
if ((bytecode_data_p->status_flags & CBC_CODE_FLAGS_STATIC_FUNCTION))
{
arrow_func_p->header.u.function.bytecode_cp = ECMA_NULL_POINTER;
((ecma_static_arrow_function_t *) func_p)->bytecode_p = bytecode_data_p;
}
else
{
#endif /* ENABLED (JERRY_SNAPSHOT_EXEC) */
ECMA_SET_INTERNAL_VALUE_POINTER (arrow_func_p->header.u.function.bytecode_cp, bytecode_data_p);
ecma_bytecode_ref ((ecma_compiled_code_t *) bytecode_data_p);
#if ENABLED (JERRY_SNAPSHOT_EXEC)
}
#endif /* ENABLED (JERRY_SNAPSHOT_EXEC) */
arrow_func_p->this_binding = ecma_copy_value_if_not_object (this_binding);
arrow_func_p->new_target = ECMA_VALUE_UNDEFINED;
if (JERRY_CONTEXT (current_new_target) != NULL)
{
arrow_func_p->new_target = ecma_make_object_value (JERRY_CONTEXT (current_new_target));
}
return func_p;
} /* ecma_op_create_arrow_function_object */
#endif /* ENABLED (JERRY_ESNEXT) */
/**
* External function object creation operation.
*
* Note:
* external function object is implementation-defined object type
* that represent functions implemented in native code, using Embedding API
*
* @return pointer to newly created external function object
*/
ecma_object_t *
ecma_op_create_external_function_object (ecma_native_handler_t handler_cb) /**< pointer to external native handler */
{
ecma_object_t *prototype_obj_p = ecma_builtin_get (ECMA_BUILTIN_ID_FUNCTION_PROTOTYPE);
ecma_object_t *function_obj_p = ecma_create_object (prototype_obj_p,
sizeof (ecma_native_function_t),
ECMA_OBJECT_TYPE_NATIVE_FUNCTION);
/*
* [[Class]] property is not stored explicitly for objects of ECMA_OBJECT_TYPE_NATIVE_FUNCTION type.
*
* See also: ecma_object_get_class_name
*/
ecma_native_function_t *native_function_p = (ecma_native_function_t *) function_obj_p;
#if ENABLED (JERRY_BUILTIN_REALMS)
ECMA_SET_INTERNAL_VALUE_POINTER (native_function_p->realm_value,
ecma_builtin_get_global ());
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
native_function_p->native_handler_cb = handler_cb;
return function_obj_p;
} /* ecma_op_create_external_function_object */
#if ENABLED (JERRY_ESNEXT)
/**
* Create built-in native handler object.
*
* @return pointer to newly created native handler object
*/
ecma_object_t *
ecma_op_create_native_handler (ecma_native_handler_id_t id, /**< handler id */
size_t object_size) /**< created object size */
{
ecma_object_t *prototype_obj_p = ecma_builtin_get (ECMA_BUILTIN_ID_FUNCTION_PROTOTYPE);
ecma_object_t *function_obj_p = ecma_create_object (prototype_obj_p,
object_size,
ECMA_OBJECT_TYPE_NATIVE_FUNCTION);
ecma_set_object_is_builtin (function_obj_p);
ecma_extended_object_t *ext_func_obj_p = (ecma_extended_object_t *) function_obj_p;
ext_func_obj_p->u.built_in.id = ECMA_BUILTIN_ID_HANDLER;
ext_func_obj_p->u.built_in.routine_id = (uint8_t) id;
ext_func_obj_p->u.built_in.u2.routine_flags = ECMA_NATIVE_HANDLER_FLAGS_NONE;
#if ENABLED (JERRY_BUILTIN_REALMS)
ECMA_SET_INTERNAL_VALUE_POINTER (ext_func_obj_p->u.built_in.realm_value,
ecma_builtin_get_global ());
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
return function_obj_p;
} /* ecma_op_create_native_handler */
#endif /* ENABLED (JERRY_ESNEXT) */
/**
* Get compiled code of a function object.
*
* @return compiled code
*/
inline const ecma_compiled_code_t * JERRY_ATTR_ALWAYS_INLINE
ecma_op_function_get_compiled_code (ecma_extended_object_t *function_p) /**< function pointer */
{
#if ENABLED (JERRY_SNAPSHOT_EXEC)
if (JERRY_LIKELY (function_p->u.function.bytecode_cp != ECMA_NULL_POINTER))
{
return ECMA_GET_INTERNAL_VALUE_POINTER (const ecma_compiled_code_t,
function_p->u.function.bytecode_cp);
}
return ((ecma_static_function_t *) function_p)->bytecode_p;
#else /* !ENABLED (JERRY_SNAPSHOT_EXEC) */
return ECMA_GET_INTERNAL_VALUE_POINTER (const ecma_compiled_code_t,
function_p->u.function.bytecode_cp);
#endif /* ENABLED (JERRY_SNAPSHOT_EXEC) */
} /* ecma_op_function_get_compiled_code */
#if ENABLED (JERRY_BUILTIN_REALMS)
/**
* Get realm from a byte code.
*
* Note:
* Does not increase the reference counter.
*
* @return pointer to realm (global) object
*/
inline ecma_global_object_t * JERRY_ATTR_ALWAYS_INLINE
ecma_op_function_get_realm (const ecma_compiled_code_t *bytecode_header_p) /**< byte code header */
{
ecma_value_t realm_value;
if (bytecode_header_p->status_flags & CBC_CODE_FLAGS_UINT16_ARGUMENTS)
{
cbc_uint16_arguments_t *args_p = (cbc_uint16_arguments_t *) bytecode_header_p;
realm_value = args_p->realm_value;
}
else
{
cbc_uint8_arguments_t *args_p = (cbc_uint8_arguments_t *) bytecode_header_p;
realm_value = args_p->realm_value;
}
#if ENABLED (JERRY_SNAPSHOT_EXEC)
if (JERRY_LIKELY (realm_value != JMEM_CP_NULL))
{
return ECMA_GET_INTERNAL_VALUE_POINTER (ecma_global_object_t, realm_value);
}
return (ecma_global_object_t *) ecma_builtin_get_global ();
#else /* !ENABLED (JERRY_SNAPSHOT_EXEC) */
return ECMA_GET_INTERNAL_VALUE_POINTER (ecma_global_object_t, realm_value);
#endif /* ENABLED (JERRY_SNAPSHOT_EXEC) */
} /* ecma_op_function_get_realm */
/**
* Get realm from a function
*
* Note:
* Does not increase the reference counter.
*
* @return realm (global) object
*/
ecma_global_object_t *
ecma_op_function_get_function_realm (ecma_object_t *func_obj_p) /**< function object */
{
if (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_FUNCTION)
{
ecma_extended_object_t *ext_function_obj_p = (ecma_extended_object_t *) func_obj_p;
const ecma_compiled_code_t *bytecode_data_p = ecma_op_function_get_compiled_code (ext_function_obj_p);
return ecma_op_function_get_realm (bytecode_data_p);
}
JERRY_ASSERT (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_NATIVE_FUNCTION);
if (ecma_get_object_is_builtin (func_obj_p))
{
ecma_extended_object_t *ext_function_obj_p = (ecma_extended_object_t *) func_obj_p;
return ECMA_GET_INTERNAL_VALUE_POINTER (ecma_global_object_t,
ext_function_obj_p->u.built_in.realm_value);
}
ecma_native_function_t *native_function_p = (ecma_native_function_t *) func_obj_p;
return ECMA_GET_INTERNAL_VALUE_POINTER (ecma_global_object_t,
native_function_p->realm_value);
} /* ecma_op_function_get_function_realm */
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
/**
* 15.3.5.3 implementation of [[HasInstance]] for Function objects
*
* @return true/false - if arguments are valid
* error - otherwise
* Returned value must be freed with ecma_free_value
*/
ecma_value_t
ecma_op_function_has_instance (ecma_object_t *func_obj_p, /**< Function object */
ecma_value_t value) /**< argument 'V' */
{
JERRY_ASSERT (func_obj_p != NULL
&& !ecma_is_lexical_environment (func_obj_p));
if (!ecma_is_value_object (value))
{
return ECMA_VALUE_FALSE;
}
while (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_BOUND_FUNCTION)
{
JERRY_ASSERT (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_BOUND_FUNCTION);
/* 1. 3. */
ecma_bound_function_t *bound_func_p = (ecma_bound_function_t *) func_obj_p;
func_obj_p = ECMA_GET_NON_NULL_POINTER_FROM_POINTER_TAG (ecma_object_t,
bound_func_p->header.u.bound_function.target_function);
}
JERRY_ASSERT (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_FUNCTION
|| ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_NATIVE_FUNCTION
|| ECMA_OBJECT_IS_PROXY (func_obj_p));
ecma_object_t *v_obj_p = ecma_get_object_from_value (value);
ecma_value_t prototype_obj_value = ecma_op_object_get_by_magic_id (func_obj_p,
LIT_MAGIC_STRING_PROTOTYPE);
if (ECMA_IS_VALUE_ERROR (prototype_obj_value))
{
return prototype_obj_value;
}
if (!ecma_is_value_object (prototype_obj_value))
{
ecma_free_value (prototype_obj_value);
return ecma_raise_type_error (ECMA_ERR_MSG ("Object expected."));
}
ecma_object_t *prototype_obj_p = ecma_get_object_from_value (prototype_obj_value);
JERRY_ASSERT (prototype_obj_p != NULL);
#if ENABLED (JERRY_BUILTIN_PROXY)
ecma_value_t result = ECMA_VALUE_ERROR;
#else /* !ENABLED (JERRY_BUILTIN_PROXY) */
ecma_value_t result = ECMA_VALUE_FALSE;
#endif /* ENABLED (JERRY_BUILTIN_PROXY) */
while (true)
{
jmem_cpointer_t v_obj_cp;
#if ENABLED (JERRY_BUILTIN_PROXY)
if (ECMA_OBJECT_IS_PROXY (v_obj_p))
{
ecma_value_t parent = ecma_proxy_object_get_prototype_of (v_obj_p);
if (ECMA_IS_VALUE_ERROR (parent))
{
break;
}
v_obj_cp = ecma_proxy_object_prototype_to_cp (parent);
}
else
{
#endif /* ENABLED (JERRY_BUILTIN_PROXY) */
v_obj_cp = ecma_op_ordinary_object_get_prototype_of (v_obj_p);
#if ENABLED (JERRY_BUILTIN_PROXY)
}
#endif /* ENABLED (JERRY_BUILTIN_PROXY) */
if (v_obj_cp == JMEM_CP_NULL)
{
#if ENABLED (JERRY_BUILTIN_PROXY)
result = ECMA_VALUE_FALSE;
#endif /* ENABLED (JERRY_BUILTIN_PROXY) */
break;
}
v_obj_p = ECMA_GET_NON_NULL_POINTER (ecma_object_t, v_obj_cp);
if (v_obj_p == prototype_obj_p)
{
result = ECMA_VALUE_TRUE;
break;
}
}
ecma_deref_object (prototype_obj_p);
return result;
} /* ecma_op_function_has_instance */
#if ENABLED (JERRY_ESNEXT)
/**
* GetSuperConstructor operation for class methods
*
* See also: ECMAScript v6, 12.3.5.2
*
* @return ECMA_VALUE_ERROR - if the operation fails
* super constructor - otherwise
*/
ecma_value_t
ecma_op_function_get_super_constructor (ecma_object_t *func_obj_p) /**< function object */
{
ecma_object_t *super_ctor_p;
#if ENABLED (JERRY_BUILTIN_PROXY)
if (ECMA_OBJECT_IS_PROXY (func_obj_p))
{
ecma_value_t super_ctor = ecma_proxy_object_get_prototype_of (func_obj_p);
if (ECMA_IS_VALUE_ERROR (super_ctor))
{
return super_ctor;
}
super_ctor_p = ecma_is_value_null (super_ctor) ? NULL : ecma_get_object_from_value (super_ctor);
}
else
{
#endif /* ENABLED (JERRY_BUILTIN_PROXY) */
jmem_cpointer_t proto_cp = ecma_op_ordinary_object_get_prototype_of (func_obj_p);
if (proto_cp == JMEM_CP_NULL)
{
super_ctor_p = NULL;
}
else
{
super_ctor_p = ECMA_GET_NON_NULL_POINTER (ecma_object_t, proto_cp);
ecma_ref_object (super_ctor_p);
}
#if ENABLED (JERRY_BUILTIN_PROXY)
}
#endif /* ENABLED (JERRY_BUILTIN_PROXY) */
if (super_ctor_p == NULL || !ecma_object_is_constructor (super_ctor_p))
{
if (super_ctor_p != NULL)
{
ecma_deref_object (super_ctor_p);
}
return ecma_raise_type_error (ECMA_ERR_MSG ("Super binding must be a constructor."));
}
return ecma_make_object_value (super_ctor_p);
} /* ecma_op_function_get_super_constructor */
#endif /* ENABLED (JERRY_ESNEXT) */
/**
* Ordinary internal method: GetPrototypeFromConstructor (constructor, intrinsicDefaultProto)
*
* See also:
* - ECMAScript v6, 9.1.15
* - ECMAScript v10, 9.1.14
*
* @return NULL - if the operation fail (exception on the global context is raised)
* pointer to the prototype object - otherwise
*/
ecma_object_t *
ecma_op_get_prototype_from_constructor (ecma_object_t *ctor_obj_p, /**< constructor to get prototype from */
ecma_builtin_id_t default_proto_id) /**< intrinsicDefaultProto */
{
JERRY_ASSERT (ecma_op_object_is_callable (ctor_obj_p));
JERRY_ASSERT (default_proto_id < ECMA_BUILTIN_ID__COUNT);
ecma_value_t proto = ecma_op_object_get_by_magic_id (ctor_obj_p, LIT_MAGIC_STRING_PROTOTYPE);
if (ECMA_IS_VALUE_ERROR (proto))
{
return NULL;
}
ecma_object_t *proto_obj_p;
if (!ecma_is_value_object (proto))
{
ecma_free_value (proto);
#if ENABLED (JERRY_BUILTIN_PROXY)
if (ECMA_OBJECT_IS_PROXY (ctor_obj_p))
{
ecma_proxy_object_t *proxy_obj_p = (ecma_proxy_object_t *) ctor_obj_p;
if (ecma_is_value_null (proxy_obj_p->handler))
{
ecma_raise_type_error (ECMA_ERR_MSG ("Prototype from revoked Proxy is invalid."));
return NULL;
}
}
#endif /* ENABLED (JERRY_BUILTIN_PROXY) */
#if ENABLED (JERRY_BUILTIN_REALMS)
proto_obj_p = ecma_builtin_get_from_realm (ecma_op_function_get_function_realm (ctor_obj_p), default_proto_id);
#else /* !ENABLED (JERRY_BUILTIN_REALMS) */
proto_obj_p = ecma_builtin_get (default_proto_id);
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
ecma_ref_object (proto_obj_p);
}
else
{
proto_obj_p = ecma_get_object_from_value (proto);
}
return proto_obj_p;
} /* ecma_op_get_prototype_from_constructor */
/**
* Perform a JavaScript function object method call.
*
* The input function object should be a pure JavaScript method
*
* @return the result of the function call.
*/
static ecma_value_t
ecma_op_function_call_simple (ecma_object_t *func_obj_p, /**< Function object */
ecma_value_t this_arg_value, /**< 'this' argument's value */
const ecma_value_t *arguments_list_p, /**< arguments list */
uint32_t arguments_list_len) /**< length of arguments list */
{
JERRY_ASSERT (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_FUNCTION);
JERRY_ASSERT (!ecma_get_object_is_builtin (func_obj_p));
vm_frame_ctx_shared_args_t shared_args;
shared_args.header.status_flags = VM_FRAME_CTX_SHARED_HAS_ARG_LIST;
shared_args.function_object_p = func_obj_p;
shared_args.arg_list_p = arguments_list_p;
shared_args.arg_list_len = arguments_list_len;
/* Entering Function Code (ECMA-262 v5, 10.4.3) */
ecma_extended_object_t *ext_func_p = (ecma_extended_object_t *) func_obj_p;
ecma_object_t *scope_p = ECMA_GET_NON_NULL_POINTER_FROM_POINTER_TAG (ecma_object_t,
ext_func_p->u.function.scope_cp);
/* 8. */
ecma_value_t this_binding = this_arg_value;
const ecma_compiled_code_t *bytecode_data_p = ecma_op_function_get_compiled_code (ext_func_p);
uint16_t status_flags = bytecode_data_p->status_flags;
shared_args.header.bytecode_header_p = bytecode_data_p;
#if ENABLED (JERRY_BUILTIN_REALMS)
ecma_global_object_t *realm_p = ecma_op_function_get_realm (bytecode_data_p);
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
/* 1. */
#if ENABLED (JERRY_ESNEXT)
if (JERRY_UNLIKELY (CBC_FUNCTION_IS_ARROW (status_flags)))
{
ecma_arrow_function_t *arrow_func_p = (ecma_arrow_function_t *) func_obj_p;
if (ecma_is_value_undefined (arrow_func_p->new_target))
{
JERRY_CONTEXT (current_new_target) = NULL;
}
else
{
JERRY_CONTEXT (current_new_target) = ecma_get_object_from_value (arrow_func_p->new_target);
}
this_binding = arrow_func_p->this_binding;
}
else
{
shared_args.header.status_flags |= VM_FRAME_CTX_SHARED_NON_ARROW_FUNC;
#endif /* ENABLED (JERRY_ESNEXT) */
if (!(status_flags & CBC_CODE_FLAGS_STRICT_MODE))
{
if (ecma_is_value_undefined (this_binding)
|| ecma_is_value_null (this_binding))
{
/* 2. */
#if ENABLED (JERRY_BUILTIN_REALMS)
this_binding = realm_p->this_binding;
#else /* !ENABLED (JERRY_BUILTIN_REALMS) */
this_binding = ecma_make_object_value (ecma_builtin_get_global ());
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
}
else if (!ecma_is_value_object (this_binding))
{
/* 3., 4. */
this_binding = ecma_op_to_object (this_binding);
shared_args.header.status_flags |= VM_FRAME_CTX_SHARED_FREE_THIS;
JERRY_ASSERT (!ECMA_IS_VALUE_ERROR (this_binding));
}
}
#if ENABLED (JERRY_ESNEXT)
}
#endif /* ENABLED (JERRY_ESNEXT) */
/* 5. */
if (!(status_flags & CBC_CODE_FLAGS_LEXICAL_ENV_NOT_NEEDED))
{
shared_args.header.status_flags |= VM_FRAME_CTX_SHARED_FREE_LOCAL_ENV;
scope_p = ecma_create_decl_lex_env (scope_p);
}
ecma_value_t ret_value;
#if ENABLED (JERRY_ESNEXT)
if (JERRY_UNLIKELY (CBC_FUNCTION_GET_TYPE (status_flags) == CBC_FUNCTION_CONSTRUCTOR))
{
if (JERRY_CONTEXT (current_new_target) == NULL)
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Class constructor cannot be invoked without 'new'."));
goto exit;
}
ecma_value_t lexical_this = this_binding;
if (ECMA_GET_THIRD_BIT_FROM_POINTER_TAG (ext_func_p->u.function.scope_cp))
{
shared_args.header.status_flags |= VM_FRAME_CTX_SHARED_HERITAGE_PRESENT;
lexical_this = ECMA_VALUE_UNINITIALIZED;
}
ecma_op_create_environment_record (scope_p, lexical_this, func_obj_p);
}
#endif /* ENABLED (JERRY_ESNEXT) */
#if ENABLED (JERRY_BUILTIN_REALMS)
ecma_global_object_t *saved_global_object_p = JERRY_CONTEXT (global_object_p);
JERRY_CONTEXT (global_object_p) = realm_p;
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
ret_value = vm_run (&shared_args.header, this_binding, scope_p);
#if ENABLED (JERRY_BUILTIN_REALMS)
JERRY_CONTEXT (global_object_p) = saved_global_object_p;
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
#if ENABLED (JERRY_ESNEXT)
/* ECMAScript v6, 9.2.2.13 */
if (JERRY_UNLIKELY (shared_args.header.status_flags & VM_FRAME_CTX_SHARED_HERITAGE_PRESENT))
{
if (!ECMA_IS_VALUE_ERROR (ret_value) && !ecma_is_value_object (ret_value))
{
if (!ecma_is_value_undefined (ret_value))
{
ecma_free_value (ret_value);
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Derived constructors may only return object or undefined."));
}
else
{
ret_value = ecma_op_get_this_binding (scope_p);
}
}
}
exit:
#endif /* ENABLED (JERRY_ESNEXT) */
if (JERRY_UNLIKELY (shared_args.header.status_flags & VM_FRAME_CTX_SHARED_FREE_LOCAL_ENV))
{
ecma_deref_object (scope_p);
}
if (JERRY_UNLIKELY (shared_args.header.status_flags & VM_FRAME_CTX_SHARED_FREE_THIS))
{
ecma_free_value (this_binding);
}
return ret_value;
} /* ecma_op_function_call_simple */
/**
* Perform a native C method call which was registered via the API.
*
* @return the result of the function call.
*/
static ecma_value_t JERRY_ATTR_NOINLINE
ecma_op_function_call_native (ecma_object_t *func_obj_p, /**< Function object */
ecma_value_t this_arg_value, /**< 'this' argument's value */
const ecma_value_t *arguments_list_p, /**< arguments list */
uint32_t arguments_list_len) /**< length of arguments list */
{
JERRY_ASSERT (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_NATIVE_FUNCTION);
if (ecma_get_object_is_builtin (func_obj_p))
{
#if ENABLED (JERRY_BUILTIN_REALMS)
ecma_global_object_t *saved_global_object_p = JERRY_CONTEXT (global_object_p);
ecma_extended_object_t *ext_func_obj_p = (ecma_extended_object_t *) func_obj_p;
JERRY_CONTEXT (global_object_p) = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_global_object_t,
ext_func_obj_p->u.built_in.realm_value);
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
ecma_value_t ret_value = ecma_builtin_dispatch_call (func_obj_p,
this_arg_value,
arguments_list_p,
arguments_list_len);
#if ENABLED (JERRY_BUILTIN_REALMS)
JERRY_CONTEXT (global_object_p) = saved_global_object_p;
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
return ret_value;
}
ecma_native_function_t *native_function_p = (ecma_native_function_t *) func_obj_p;
#if ENABLED (JERRY_BUILTIN_REALMS)
ecma_global_object_t *saved_global_object_p = JERRY_CONTEXT (global_object_p);
JERRY_CONTEXT (global_object_p) = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_global_object_t,
native_function_p->realm_value);
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
JERRY_ASSERT (native_function_p->native_handler_cb != NULL);
ecma_value_t ret_value = native_function_p->native_handler_cb (ecma_make_object_value (func_obj_p),
this_arg_value,
arguments_list_p,
arguments_list_len);
#if ENABLED (JERRY_BUILTIN_REALMS)
JERRY_CONTEXT (global_object_p) = saved_global_object_p;
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
if (JERRY_UNLIKELY (ecma_is_value_error_reference (ret_value)))
{
ecma_raise_error_from_error_reference (ret_value);
return ECMA_VALUE_ERROR;
}
#if ENABLED (JERRY_DEBUGGER)
JERRY_DEBUGGER_CLEAR_FLAGS (JERRY_DEBUGGER_VM_EXCEPTION_THROWN);
#endif /* ENABLED (JERRY_DEBUGGER) */
return ret_value;
} /* ecma_op_function_call_native */
/**
* Append the bound arguments into the given collection
*
* Note:
* - The whole bound chain is resolved
* - The first element of the collection contains the bounded this value
*
* @return target function of the bound function
*/
JERRY_ATTR_NOINLINE static ecma_object_t *
ecma_op_bound_function_get_argument_list (ecma_object_t *func_obj_p, /**< bound bunction object */
ecma_collection_t *list_p) /**< list of arguments */
{
JERRY_ASSERT (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_BOUND_FUNCTION);
ecma_bound_function_t *bound_func_p = (ecma_bound_function_t *) func_obj_p;
func_obj_p = ECMA_GET_NON_NULL_POINTER_FROM_POINTER_TAG (ecma_object_t,
bound_func_p->header.u.bound_function.target_function);
ecma_value_t args_len_or_this = bound_func_p->header.u.bound_function.args_len_or_this;
uint32_t args_length = 1;
if (ecma_is_value_integer_number (args_len_or_this))
{
args_length = (uint32_t) ecma_get_integer_from_value (args_len_or_this);
}
/* 5. */
if (args_length != 1)
{
const ecma_value_t *args_p = (const ecma_value_t *) (bound_func_p + 1);
list_p->buffer_p[0] = *args_p;
if (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_BOUND_FUNCTION)
{
func_obj_p = ecma_op_bound_function_get_argument_list (func_obj_p, list_p);
}
ecma_collection_append (list_p, args_p + 1, args_length - 1);
}
else
{
list_p->buffer_p[0] = args_len_or_this;
}
return func_obj_p;
} /* ecma_op_bound_function_get_argument_list */
/**
* [[Call]] internal method for bound function objects
*
* @return ecma value
* Returned value must be freed with ecma_free_value
*/
static ecma_value_t JERRY_ATTR_NOINLINE
ecma_op_function_call_bound (ecma_object_t *func_obj_p, /**< Function object */
const ecma_value_t *arguments_list_p, /**< arguments list */
uint32_t arguments_list_len) /**< length of arguments list */
{
JERRY_ASSERT (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_BOUND_FUNCTION);
JERRY_CONTEXT (status_flags) &= (uint32_t) ~ECMA_STATUS_DIRECT_EVAL;
ecma_collection_t *bound_arg_list_p = ecma_new_collection ();
ecma_collection_push_back (bound_arg_list_p, ECMA_VALUE_EMPTY);
ecma_object_t *target_obj_p = ecma_op_bound_function_get_argument_list (func_obj_p, bound_arg_list_p);
ecma_collection_append (bound_arg_list_p, arguments_list_p, arguments_list_len);
JERRY_ASSERT (!ecma_is_value_empty (bound_arg_list_p->buffer_p[0]));
ecma_value_t ret_value = ecma_op_function_call (target_obj_p,
bound_arg_list_p->buffer_p[0],
bound_arg_list_p->buffer_p + 1,
(uint32_t) (bound_arg_list_p->item_count - 1));
ecma_collection_destroy (bound_arg_list_p);
return ret_value;
} /* ecma_op_function_call_bound */
/**
* [[Call]] implementation for Function objects,
* created through 13.2 (ECMA_OBJECT_TYPE_FUNCTION)
* or 15.3.4.5 (ECMA_OBJECT_TYPE_BOUND_FUNCTION),
* and for built-in Function objects
* from section 15 (ECMA_OBJECT_TYPE_FUNCTION).
*
* @return ecma value
* Returned value must be freed with ecma_free_value
*/
ecma_value_t
ecma_op_function_call (ecma_object_t *func_obj_p, /**< Function object */
ecma_value_t this_arg_value, /**< 'this' argument's value */
const ecma_value_t *arguments_list_p, /**< arguments list */
uint32_t arguments_list_len) /**< length of arguments list */
{
JERRY_ASSERT (func_obj_p != NULL
&& !ecma_is_lexical_environment (func_obj_p));
JERRY_ASSERT (ecma_op_object_is_callable (func_obj_p));
ECMA_CHECK_STACK_USAGE ();
const ecma_object_type_t type = ecma_get_object_type (func_obj_p);
#if ENABLED (JERRY_BUILTIN_PROXY)
if (ECMA_OBJECT_TYPE_IS_PROXY (type))
{
return ecma_proxy_object_call (func_obj_p, this_arg_value, arguments_list_p, arguments_list_len);
}
#endif /* ENABLED (JERRY_BUILTIN_PROXY) */
#if ENABLED (JERRY_ESNEXT)
ecma_object_t *old_new_target_p = JERRY_CONTEXT (current_new_target);
if (JERRY_UNLIKELY (!(JERRY_CONTEXT (status_flags) & ECMA_STATUS_DIRECT_EVAL)))
{
JERRY_CONTEXT (current_new_target) = NULL;
}
#endif /* ENABLED (JERRY_ESNEXT) */
ecma_value_t result;
if (JERRY_LIKELY (type == ECMA_OBJECT_TYPE_FUNCTION))
{
result = ecma_op_function_call_simple (func_obj_p, this_arg_value, arguments_list_p, arguments_list_len);
}
else if (type == ECMA_OBJECT_TYPE_NATIVE_FUNCTION)
{
result = ecma_op_function_call_native (func_obj_p, this_arg_value, arguments_list_p, arguments_list_len);
}
else
{
result = ecma_op_function_call_bound (func_obj_p, arguments_list_p, arguments_list_len);
}
#if ENABLED (JERRY_ESNEXT)
JERRY_CONTEXT (current_new_target) = old_new_target_p;
#endif /* ENABLED (JERRY_ESNEXT) */
return result;
} /* ecma_op_function_call */
/**
* [[Construct]] internal method for bound function objects
*
* @return ecma value
* Returned value must be freed with ecma_free_value
*/
static ecma_value_t JERRY_ATTR_NOINLINE
ecma_op_function_construct_bound (ecma_object_t *func_obj_p, /**< Function object */
ecma_object_t *new_target_p, /**< new target */
const ecma_value_t *arguments_list_p, /**< arguments list */
uint32_t arguments_list_len) /**< length of arguments list */
{
JERRY_ASSERT (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_BOUND_FUNCTION);
ecma_collection_t *bound_arg_list_p = ecma_new_collection ();
ecma_collection_push_back (bound_arg_list_p, ECMA_VALUE_EMPTY);
ecma_object_t *target_obj_p = ecma_op_bound_function_get_argument_list (func_obj_p, bound_arg_list_p);
ecma_collection_append (bound_arg_list_p, arguments_list_p, arguments_list_len);
if (func_obj_p == new_target_p)
{
new_target_p = target_obj_p;
}
ecma_value_t ret_value = ecma_op_function_construct (target_obj_p,
new_target_p,
bound_arg_list_p->buffer_p + 1,
(uint32_t) (bound_arg_list_p->item_count - 1));
ecma_collection_destroy (bound_arg_list_p);
return ret_value;
} /* ecma_op_function_construct_bound */
/**
* [[Construct]] internal method for external function objects
*
* @return ecma value
* Returned value must be freed with ecma_free_value
*/
static ecma_value_t
ecma_op_function_construct_native (ecma_object_t *func_obj_p, /**< Function object */
ecma_object_t *new_target_p, /**< new target */
const ecma_value_t *arguments_list_p, /**< arguments list */
uint32_t arguments_list_len) /**< length of arguments list */
{
JERRY_ASSERT (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_NATIVE_FUNCTION);
ecma_object_t *proto_p = ecma_op_get_prototype_from_constructor (new_target_p, ECMA_BUILTIN_ID_OBJECT_PROTOTYPE);
if (JERRY_UNLIKELY (proto_p == NULL))
{
return ECMA_VALUE_ERROR;
}
ecma_object_t *new_this_obj_p = ecma_create_object (proto_p, 0, ECMA_OBJECT_TYPE_GENERAL);
ecma_value_t this_arg = ecma_make_object_value (new_this_obj_p);
ecma_deref_object (proto_p);
#if ENABLED (JERRY_ESNEXT)
ecma_object_t *old_new_target_p = JERRY_CONTEXT (current_new_target);
JERRY_CONTEXT (current_new_target) = new_target_p;
#endif /* ENABLED (JERRY_ESNEXT) */
ecma_value_t ret_value = ecma_op_function_call_native (func_obj_p, this_arg, arguments_list_p, arguments_list_len);
#if ENABLED (JERRY_ESNEXT)
JERRY_CONTEXT (current_new_target) = old_new_target_p;
#endif /* ENABLED (JERRY_ESNEXT) */
if (ECMA_IS_VALUE_ERROR (ret_value) || ecma_is_value_object (ret_value))
{
ecma_deref_object (new_this_obj_p);
return ret_value;
}
ecma_free_value (ret_value);
return this_arg;
} /* ecma_op_function_construct_native */
/**
* General [[Construct]] implementation function objects
*
* See also: ECMAScript v6, 9.2.2
*
* @return ecma value
* Returned value must be freed with ecma_free_value
*/
ecma_value_t
ecma_op_function_construct (ecma_object_t *func_obj_p, /**< Function object */
ecma_object_t *new_target_p, /**< new target */
const ecma_value_t *arguments_list_p, /**< arguments list */
uint32_t arguments_list_len) /**< length of arguments list */
{
JERRY_ASSERT (func_obj_p != NULL
&& !ecma_is_lexical_environment (func_obj_p));
const ecma_object_type_t type = ecma_get_object_type (func_obj_p);
#if ENABLED (JERRY_BUILTIN_PROXY)
if (ECMA_OBJECT_TYPE_IS_PROXY (type))
{
return ecma_proxy_object_construct (func_obj_p,
new_target_p,
arguments_list_p,
arguments_list_len);
}
#endif /* ENABLED (JERRY_BUILTIN_PROXY) */
if (JERRY_UNLIKELY (type == ECMA_OBJECT_TYPE_BOUND_FUNCTION))
{
return ecma_op_function_construct_bound (func_obj_p, new_target_p, arguments_list_p, arguments_list_len);
}
if (JERRY_UNLIKELY (type == ECMA_OBJECT_TYPE_NATIVE_FUNCTION))
{
if (JERRY_UNLIKELY (ecma_get_object_is_builtin (func_obj_p)))
{
#if ENABLED (JERRY_BUILTIN_REALMS)
ecma_global_object_t *saved_global_object_p = JERRY_CONTEXT (global_object_p);
ecma_value_t realm_value = ((ecma_extended_object_t *) func_obj_p)->u.built_in.realm_value;
JERRY_CONTEXT (global_object_p) = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_global_object_t, realm_value);
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
#if ENABLED (JERRY_ESNEXT)
ecma_object_t *old_new_target = JERRY_CONTEXT (current_new_target);
JERRY_CONTEXT (current_new_target) = new_target_p;
#endif /* ENABLED (JERRY_ESNEXT) */
ecma_value_t ret_value = ecma_builtin_dispatch_construct (func_obj_p, arguments_list_p, arguments_list_len);
#if ENABLED (JERRY_ESNEXT)
JERRY_CONTEXT (current_new_target) = old_new_target;
#endif /* ENABLED (JERRY_ESNEXT) */
#if ENABLED (JERRY_BUILTIN_REALMS)
JERRY_CONTEXT (global_object_p) = saved_global_object_p;
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
return ret_value;
}
return ecma_op_function_construct_native (func_obj_p, new_target_p, arguments_list_p, arguments_list_len);
}
JERRY_ASSERT (type == ECMA_OBJECT_TYPE_FUNCTION);
JERRY_ASSERT (!ecma_get_object_is_builtin (func_obj_p));
ecma_object_t *new_this_obj_p = NULL;
ecma_value_t this_arg;
#if ENABLED (JERRY_ESNEXT)
ecma_extended_object_t *ext_func_obj_p = (ecma_extended_object_t *) func_obj_p;
/* 5. */
if (!ECMA_GET_THIRD_BIT_FROM_POINTER_TAG (ext_func_obj_p->u.function.scope_cp))
{
#endif /* ENABLED (JERRY_ESNEXT) */
/* 5.a */
ecma_object_t *proto_p = ecma_op_get_prototype_from_constructor (new_target_p, ECMA_BUILTIN_ID_OBJECT_PROTOTYPE);
/* 5.b */
if (JERRY_UNLIKELY (proto_p == NULL))
{
return ECMA_VALUE_ERROR;
}
new_this_obj_p = ecma_create_object (proto_p, 0, ECMA_OBJECT_TYPE_GENERAL);
ecma_deref_object (proto_p);
this_arg = ecma_make_object_value (new_this_obj_p);
#if ENABLED (JERRY_ESNEXT)
}
else
{
this_arg = ECMA_VALUE_UNDEFINED;
}
/* 6. */
ecma_object_t *old_new_target_p = JERRY_CONTEXT (current_new_target);
JERRY_CONTEXT (current_new_target) = new_target_p;
#endif /* ENABLED (JERRY_ESNEXT) */
ecma_value_t ret_value = ecma_op_function_call_simple (func_obj_p, this_arg, arguments_list_p, arguments_list_len);
#if ENABLED (JERRY_ESNEXT)
JERRY_CONTEXT (current_new_target) = old_new_target_p;
#endif /* ENABLED (JERRY_ESNEXT) */
/* 13.a */
if (ECMA_IS_VALUE_ERROR (ret_value) || ecma_is_value_object (ret_value))
{
#if ENABLED (JERRY_ESNEXT)
if (new_this_obj_p != NULL)
{
ecma_deref_object (new_this_obj_p);
}
#else /* !ENABLED (JERRY_ESNEXT) */
ecma_deref_object (new_this_obj_p);
#endif /* ENABLED (JERRY_ESNEXT) */
return ret_value;
}
/* 13.b */
ecma_free_value (ret_value);
return this_arg;
} /* ecma_op_function_construct */
/**
* Lazy instantiation of 'prototype' property for non-builtin and external functions
*
* @return pointer to newly instantiated property
*/
static ecma_property_t *
ecma_op_lazy_instantiate_prototype_object (ecma_object_t *object_p) /**< the function object */
{
JERRY_ASSERT (ecma_get_object_type (object_p) == ECMA_OBJECT_TYPE_FUNCTION
|| ecma_get_object_type (object_p) == ECMA_OBJECT_TYPE_NATIVE_FUNCTION);
#if ENABLED (JERRY_BUILTIN_REALMS)
ecma_global_object_t *global_object_p;
if (ecma_get_object_type (object_p) == ECMA_OBJECT_TYPE_FUNCTION)
{
const ecma_compiled_code_t *bytecode_data_p;
bytecode_data_p = ecma_op_function_get_compiled_code ((ecma_extended_object_t *) object_p);
global_object_p = ecma_op_function_get_realm (bytecode_data_p);
}
else
{
ecma_native_function_t *native_function_p = (ecma_native_function_t *) object_p;
global_object_p = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_global_object_t,
native_function_p->realm_value);
}
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
/* ECMA-262 v5, 13.2, 16-18 */
ecma_object_t *proto_object_p = NULL;
bool init_constructor = true;
#if ENABLED (JERRY_ESNEXT)
if (ecma_get_object_type (object_p) == ECMA_OBJECT_TYPE_FUNCTION)
{
const ecma_compiled_code_t *byte_code_p = ecma_op_function_get_compiled_code ((ecma_extended_object_t *) object_p);
if (!CBC_FUNCTION_HAS_PROTOTYPE (byte_code_p->status_flags))
{
return NULL;
}
if (CBC_FUNCTION_GET_TYPE (byte_code_p->status_flags) == CBC_FUNCTION_GENERATOR)
{
ecma_object_t *prototype_p;
#if ENABLED (JERRY_BUILTIN_REALMS)
prototype_p = ecma_builtin_get_from_realm (global_object_p, ECMA_BUILTIN_ID_GENERATOR_PROTOTYPE);
#else /* !ENABLED (JERRY_BUILTIN_REALMS) */
prototype_p = ecma_builtin_get (ECMA_BUILTIN_ID_GENERATOR_PROTOTYPE);
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
proto_object_p = ecma_create_object (prototype_p, 0, ECMA_OBJECT_TYPE_GENERAL);
init_constructor = false;
}
if (CBC_FUNCTION_GET_TYPE (byte_code_p->status_flags) == CBC_FUNCTION_ASYNC_GENERATOR)
{
ecma_object_t *prototype_p;
#if ENABLED (JERRY_BUILTIN_REALMS)
prototype_p = ecma_builtin_get_from_realm (global_object_p, ECMA_BUILTIN_ID_ASYNC_GENERATOR_PROTOTYPE);
#else /* !ENABLED (JERRY_BUILTIN_REALMS) */
prototype_p = ecma_builtin_get (ECMA_BUILTIN_ID_ASYNC_GENERATOR_PROTOTYPE);
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
proto_object_p = ecma_create_object (prototype_p, 0, ECMA_OBJECT_TYPE_GENERAL);
init_constructor = false;
}
}
#endif /* ENABLED (JERRY_ESNEXT) */
#if ENABLED (JERRY_ESNEXT)
if (proto_object_p == NULL)
#endif /* ENABLED (JERRY_ESNEXT) */
{
ecma_object_t *prototype_p;
#if ENABLED (JERRY_BUILTIN_REALMS)
prototype_p = ecma_builtin_get_from_realm (global_object_p, ECMA_BUILTIN_ID_OBJECT_PROTOTYPE);
#else /* !ENABLED (JERRY_BUILTIN_REALMS) */
prototype_p = ecma_builtin_get (ECMA_BUILTIN_ID_OBJECT_PROTOTYPE);
#endif /* ENABLED (JERRY_BUILTIN_REALMS) */
proto_object_p = ecma_op_create_object_object_noarg_and_set_prototype (prototype_p);
}
/* 17. */
if (init_constructor)
{
ecma_property_value_t *constructor_prop_value_p;
constructor_prop_value_p = ecma_create_named_data_property (proto_object_p,
ecma_get_magic_string (LIT_MAGIC_STRING_CONSTRUCTOR),
ECMA_PROPERTY_CONFIGURABLE_WRITABLE,
NULL);
constructor_prop_value_p->value = ecma_make_object_value (object_p);
}
/* 18. */
ecma_property_t *prototype_prop_p;
ecma_property_value_t *prototype_prop_value_p;
prototype_prop_value_p = ecma_create_named_data_property (object_p,
ecma_get_magic_string (LIT_MAGIC_STRING_PROTOTYPE),
ECMA_PROPERTY_FLAG_WRITABLE,
&prototype_prop_p);
prototype_prop_value_p->value = ecma_make_object_value (proto_object_p);
ecma_deref_object (proto_object_p);
return prototype_prop_p;
} /* ecma_op_lazy_instantiate_prototype_object */
/**
* Lazy instantiation of non-builtin ecma function object's properties
*
* Warning:
* Only non-configurable properties could be instantiated lazily in this function,
* as configurable properties could be deleted and it would be incorrect
* to reinstantiate them in the function in second time.
*
* @return pointer to newly instantiated property, if a property was instantiated,
* NULL - otherwise
*/
ecma_property_t *
ecma_op_function_try_to_lazy_instantiate_property (ecma_object_t *object_p, /**< the function object */
ecma_string_t *property_name_p) /**< property name */
{
JERRY_ASSERT (!ecma_get_object_is_builtin (object_p));
#if ENABLED (JERRY_ESNEXT)
if (ecma_compare_ecma_string_to_magic_id (property_name_p, LIT_MAGIC_STRING_LENGTH))
{
ecma_extended_object_t *ext_func_p = (ecma_extended_object_t *) object_p;
if (!ECMA_GET_FIRST_BIT_FROM_POINTER_TAG (ext_func_p->u.function.scope_cp))
{
/* Initialize 'length' property */
const ecma_compiled_code_t *bytecode_data_p = ecma_op_function_get_compiled_code (ext_func_p);
uint32_t len;
if (bytecode_data_p->status_flags & CBC_CODE_FLAGS_HAS_EXTENDED_INFO)
{
len = CBC_EXTENDED_INFO_GET_LENGTH (ecma_compiled_code_resolve_extended_info (bytecode_data_p));
}
else if (bytecode_data_p->status_flags & CBC_CODE_FLAGS_UINT16_ARGUMENTS)
{
cbc_uint16_arguments_t *args_p = (cbc_uint16_arguments_t *) bytecode_data_p;
len = args_p->argument_end;
}
else
{
cbc_uint8_arguments_t *args_p = (cbc_uint8_arguments_t *) bytecode_data_p;
len = args_p->argument_end;
}
/* Set tag bit to represent initialized 'length' property */
ECMA_SET_FIRST_BIT_TO_POINTER_TAG (ext_func_p->u.function.scope_cp);
ecma_property_t *value_prop_p;
ecma_property_value_t *value_p = ecma_create_named_data_property (object_p,
property_name_p,
ECMA_PROPERTY_FLAG_CONFIGURABLE,
&value_prop_p);
value_p->value = ecma_make_uint32_value (len);
return value_prop_p;
}
return NULL;
}
if (ecma_compare_ecma_string_to_magic_id (property_name_p, LIT_MAGIC_STRING_NAME))
{
ecma_extended_object_t *ext_func_p = (ecma_extended_object_t *) object_p;
if (!ECMA_GET_SECOND_BIT_FROM_POINTER_TAG (ext_func_p->u.function.scope_cp))
{
/* Set tag bit to represent initialized 'name' property */
ECMA_SET_SECOND_BIT_TO_POINTER_TAG (ext_func_p->u.function.scope_cp);
const ecma_compiled_code_t *bytecode_data_p = ecma_op_function_get_compiled_code (ext_func_p);
if (CBC_FUNCTION_GET_TYPE (bytecode_data_p->status_flags) != CBC_FUNCTION_CONSTRUCTOR)
{
ecma_value_t value = *ecma_compiled_code_resolve_function_name (bytecode_data_p);
if (value != ECMA_VALUE_EMPTY)
{
JERRY_ASSERT (ecma_is_value_string (value));
/* Initialize 'name' property */
ecma_property_t *value_prop_p;
ecma_property_value_t *value_p = ecma_create_named_data_property (object_p,
property_name_p,
ECMA_PROPERTY_FLAG_CONFIGURABLE,
&value_prop_p);
value_p->value = ecma_copy_value (value);
return value_prop_p;
}
}
}
return NULL;
}
#endif /* ENABLED (JERRY_ESNEXT) */
if (ecma_compare_ecma_string_to_magic_id (property_name_p, LIT_MAGIC_STRING_PROTOTYPE)
&& ecma_get_object_type (object_p) == ECMA_OBJECT_TYPE_FUNCTION)
{
return ecma_op_lazy_instantiate_prototype_object (object_p);
}
const bool is_arguments = ecma_compare_ecma_string_to_magic_id (property_name_p, LIT_MAGIC_STRING_ARGUMENTS);
if (is_arguments
|| ecma_compare_ecma_string_to_magic_id (property_name_p, LIT_MAGIC_STRING_CALLER))
{
const ecma_compiled_code_t *bytecode_data_p;
bytecode_data_p = ecma_op_function_get_compiled_code ((ecma_extended_object_t *) object_p);
#if ENABLED (JERRY_ESNEXT)
if (!(bytecode_data_p->status_flags & CBC_CODE_FLAGS_STRICT_MODE)
&& CBC_FUNCTION_GET_TYPE (bytecode_data_p->status_flags) == CBC_FUNCTION_NORMAL)
{
ecma_property_t *value_prop_p;
/* The property_name_p argument contains the name. */
ecma_property_value_t *value_p = ecma_create_named_data_property (object_p,
property_name_p,
ECMA_PROPERTY_FIXED,
&value_prop_p);
value_p->value = is_arguments ? ECMA_VALUE_NULL : ECMA_VALUE_UNDEFINED;
return value_prop_p;
}
#else /* !ENABLED (JERRY_ESNEXT) */
if (bytecode_data_p->status_flags & CBC_CODE_FLAGS_STRICT_MODE)
{
ecma_object_t *thrower_p = ecma_builtin_get (ECMA_BUILTIN_ID_TYPE_ERROR_THROWER);
ecma_property_t *caller_prop_p;
/* The property_name_p argument contains the name. */
ecma_create_named_accessor_property (object_p,
property_name_p,
thrower_p,
thrower_p,
ECMA_PROPERTY_FIXED,
&caller_prop_p);
return caller_prop_p;
}
#endif /* ENABLED (JERRY_ESNEXT) */
}
return NULL;
} /* ecma_op_function_try_to_lazy_instantiate_property */
/**
* Create specification defined non-configurable properties for external functions.
*
* See also:
* ECMA-262 v5, 15.3.4.5
*
* @return pointer property, if one was instantiated,
* NULL - otherwise.
*/
ecma_property_t *
ecma_op_external_function_try_to_lazy_instantiate_property (ecma_object_t *object_p, /**< object */
ecma_string_t *property_name_p) /**< property's name */
{
JERRY_ASSERT (ecma_get_object_type (object_p) == ECMA_OBJECT_TYPE_NATIVE_FUNCTION);
if (ecma_compare_ecma_string_to_magic_id (property_name_p, LIT_MAGIC_STRING_PROTOTYPE))
{
return ecma_op_lazy_instantiate_prototype_object (object_p);
}
return NULL;
} /* ecma_op_external_function_try_to_lazy_instantiate_property */
/**
* Create specification defined non-configurable properties for bound functions.
*
* See also:
* ECMA-262 v5, 15.3.4.5
*
* @return pointer property, if one was instantiated,
* NULL - otherwise.
*/
ecma_property_t *
ecma_op_bound_function_try_to_lazy_instantiate_property (ecma_object_t *object_p, /**< object */
ecma_string_t *property_name_p) /**< property's name */
{
JERRY_ASSERT (ecma_get_object_type (object_p) == ECMA_OBJECT_TYPE_BOUND_FUNCTION);
if (ecma_string_is_length (property_name_p))
{
ecma_bound_function_t *bound_func_p = (ecma_bound_function_t *) object_p;
ecma_value_t args_len_or_this = bound_func_p->header.u.bound_function.args_len_or_this;
ecma_number_t length = 0;
ecma_integer_value_t args_length = 1;
uint8_t length_attributes;
if (ecma_is_value_integer_number (args_len_or_this))
{
args_length = ecma_get_integer_from_value (args_len_or_this);
}
#if ENABLED (JERRY_ESNEXT)
if (ECMA_GET_FIRST_BIT_FROM_POINTER_TAG (bound_func_p->header.u.bound_function.target_function))
{
return NULL;
}
length_attributes = ECMA_PROPERTY_FLAG_CONFIGURABLE;
length = ecma_get_number_from_value (bound_func_p->target_length) - (args_length - 1);
/* Set tag bit to represent initialized 'length' property */
ECMA_SET_FIRST_BIT_TO_POINTER_TAG (bound_func_p->header.u.bound_function.target_function);
#else /* !ENABLED (JERRY_ESNEXT) */
length_attributes = ECMA_PROPERTY_FIXED;
ecma_object_t *target_func_p;
target_func_p = ECMA_GET_NON_NULL_POINTER_FROM_POINTER_TAG (ecma_object_t,
bound_func_p->header.u.bound_function.target_function);
if (ecma_object_get_class_name (target_func_p) == LIT_MAGIC_STRING_FUNCTION_UL)
{
/* The property_name_p argument contains the 'length' string. */
ecma_value_t get_len_value = ecma_op_object_get (target_func_p, property_name_p);
JERRY_ASSERT (!ECMA_IS_VALUE_ERROR (get_len_value));
JERRY_ASSERT (ecma_is_value_integer_number (get_len_value));
length = (ecma_number_t) (ecma_get_integer_from_value (get_len_value) - (args_length - 1));
}
#endif /* ENABLED (JERRY_ESNEXT) */
if (length < 0)
{
length = 0;
}
ecma_property_t *len_prop_p;
ecma_property_value_t *len_prop_value_p = ecma_create_named_data_property (object_p,
property_name_p,
length_attributes,
&len_prop_p);
len_prop_value_p->value = ecma_make_number_value (length);
return len_prop_p;
}
#if !ENABLED (JERRY_ESNEXT)
if (ecma_compare_ecma_string_to_magic_id (property_name_p, LIT_MAGIC_STRING_CALLER)
|| ecma_compare_ecma_string_to_magic_id (property_name_p, LIT_MAGIC_STRING_ARGUMENTS))
{
ecma_object_t *thrower_p = ecma_builtin_get (ECMA_BUILTIN_ID_TYPE_ERROR_THROWER);
ecma_property_t *caller_prop_p;
/* The string_p argument contans the name. */
ecma_create_named_accessor_property (object_p,
property_name_p,
thrower_p,
thrower_p,
ECMA_PROPERTY_FIXED,
&caller_prop_p);
return caller_prop_p;
}
#endif /* !ENABLED (JERRY_ESNEXT) */
return NULL;
} /* ecma_op_bound_function_try_to_lazy_instantiate_property */
/**
* List names of a Function object's lazy instantiated properties,
* adding them to corresponding string collections
*
* See also:
* ecma_op_function_try_to_lazy_instantiate_property
*/
void
ecma_op_function_list_lazy_property_names (ecma_object_t *object_p, /**< functionobject */
ecma_collection_t *prop_names_p, /**< prop name collection */
ecma_property_counter_t *prop_counter_p) /**< prop counter */
{
#if ENABLED (JERRY_ESNEXT)
ecma_extended_object_t *ext_func_p = (ecma_extended_object_t *) object_p;
if (!ECMA_GET_FIRST_BIT_FROM_POINTER_TAG (ext_func_p->u.function.scope_cp))
{
/* Unintialized 'length' property is non-enumerable (ECMA-262 v6, 19.2.4.1) */
ecma_collection_push_back (prop_names_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_LENGTH));
prop_counter_p->string_named_props++;
}
#else /* !ENABLED (JERRY_ESNEXT) */
/* 'length' property is non-enumerable (ECMA-262 v5, 13.2.5) */
ecma_collection_push_back (prop_names_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_LENGTH));
prop_counter_p->string_named_props++;
#endif /* ENABLED (JERRY_ESNEXT) */
const ecma_compiled_code_t *bytecode_data_p;
bytecode_data_p = ecma_op_function_get_compiled_code ((ecma_extended_object_t *) object_p);
#if ENABLED (JERRY_ESNEXT)
if (!CBC_FUNCTION_HAS_PROTOTYPE (bytecode_data_p->status_flags))
{
return;
}
#endif /* ENABLED (JERRY_ESNEXT) */
/* 'prototype' property is non-enumerable (ECMA-262 v5, 13.2.18) */
ecma_collection_push_back (prop_names_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_PROTOTYPE));
prop_counter_p->string_named_props++;
#if ENABLED (JERRY_ESNEXT)
bool append_caller_and_arguments = !(bytecode_data_p->status_flags & CBC_CODE_FLAGS_STRICT_MODE);
#else /* !ENABLED (JERRY_ESNEXT) */
bool append_caller_and_arguments = (bytecode_data_p->status_flags & CBC_CODE_FLAGS_STRICT_MODE);
#endif /* ENABLED (JERRY_ESNEXT) */
if (append_caller_and_arguments)
{
/* 'caller' property is non-enumerable (ECMA-262 v5, 13.2.5) */
ecma_collection_push_back (prop_names_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_CALLER));
/* 'arguments' property is non-enumerable (ECMA-262 v5, 13.2.5) */
ecma_collection_push_back (prop_names_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_ARGUMENTS));
prop_counter_p->string_named_props += 2;
}
} /* ecma_op_function_list_lazy_property_names */
/**
* List names of an External Function object's lazy instantiated properties,
* adding them to corresponding string collections
*
* See also:
* ecma_op_external_function_try_to_lazy_instantiate_property
*/
void
ecma_op_external_function_list_lazy_property_names (ecma_object_t *object_p, /**< function object */
ecma_collection_t *prop_names_p, /**< prop name collection */
ecma_property_counter_t *prop_counter_p) /**< prop counter */
{
#if !ENABLED (JERRY_ESNEXT)
JERRY_UNUSED (object_p);
#else /* ENABLED (JERRY_ESNEXT) */
if (!ecma_op_ordinary_object_has_own_property (object_p, ecma_get_magic_string (LIT_MAGIC_STRING_PROTOTYPE)))
#endif /* !ENABLED (JERRY_ESNEXT) */
{
/* 'prototype' property is non-enumerable (ECMA-262 v5, 13.2.18) */
ecma_collection_push_back (prop_names_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_PROTOTYPE));
prop_counter_p->string_named_props++;
}
} /* ecma_op_external_function_list_lazy_property_names */
/**
* List names of a Bound Function object's lazy instantiated properties,
* adding them to corresponding string collections
*
* See also:
* ecma_op_bound_function_try_to_lazy_instantiate_property
*/
void
ecma_op_bound_function_list_lazy_property_names (ecma_object_t *object_p, /**< bound function object*/
ecma_collection_t *prop_names_p, /**< prop name collection */
ecma_property_counter_t *prop_counter_p) /**< prop counter */
{
#if ENABLED (JERRY_ESNEXT)
/* Unintialized 'length' property is non-enumerable (ECMA-262 v6, 19.2.4.1) */
ecma_bound_function_t *bound_func_p = (ecma_bound_function_t *) object_p;
if (!ECMA_GET_FIRST_BIT_FROM_POINTER_TAG (bound_func_p->header.u.bound_function.target_function))
{
ecma_collection_push_back (prop_names_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_LENGTH));
prop_counter_p->string_named_props++;
}
#else /* !ENABLED (JERRY_ESNEXT) */
JERRY_UNUSED (object_p);
/* 'length' property is non-enumerable (ECMA-262 v5, 13.2.5) */
ecma_collection_push_back (prop_names_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_LENGTH));
prop_counter_p->string_named_props++;
#endif /* ENABLED (JERRY_ESNEXT) */
/* 'caller' property is non-enumerable (ECMA-262 v5, 13.2.5) */
ecma_collection_push_back (prop_names_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_CALLER));
/* 'arguments' property is non-enumerable (ECMA-262 v5, 13.2.5) */
ecma_collection_push_back (prop_names_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_ARGUMENTS));
prop_counter_p->string_named_props += 2;
} /* ecma_op_bound_function_list_lazy_property_names */
/**
* @}
* @}
*/
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