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jerryscript/jerry-core/vm/vm.c
Robert Fancsik 830011c033 Eliminate the allocation of spread object (#3333) 
ECMA_VALUE_SPREAD_ELEMENT can be used to represent that the next argument needs to be spreaded, therefore no allocation is needed.

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
2019-11-19 18:16:43 +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 "common.h"
#include "ecma-alloc.h"
#include "ecma-array-object.h"
#include "ecma-builtins.h"
#include "ecma-comparison.h"
#include "ecma-conversion.h"
#include "ecma-exceptions.h"
#include "ecma-function-object.h"
#include "ecma-gc.h"
#include "ecma-helpers.h"
#include "ecma-iterator-object.h"
#include "ecma-lcache.h"
#include "ecma-lex-env.h"
#include "ecma-objects.h"
#include "ecma-objects-general.h"
#include "ecma-regexp-object.h"
#include "ecma-try-catch-macro.h"
#include "jcontext.h"
#include "opcodes.h"
#include "vm.h"
#include "vm-stack.h"
/** \addtogroup vm Virtual machine
* @{
*
* \addtogroup vm_executor Executor
* @{
*/
/**
* Get the value of object[property].
*
* @return ecma value
*/
static ecma_value_t
vm_op_get_value (ecma_value_t object, /**< base object */
ecma_value_t property) /**< property name */
{
if (ecma_is_value_object (object))
{
ecma_object_t *object_p = ecma_get_object_from_value (object);
ecma_string_t *property_name_p = NULL;
if (ecma_is_value_integer_number (property))
{
ecma_integer_value_t int_value = ecma_get_integer_from_value (property);
if (int_value >= 0 && int_value <= ECMA_DIRECT_STRING_MAX_IMM)
{
if (ecma_get_object_type (object_p) == ECMA_OBJECT_TYPE_ARRAY)
{
ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) object_p;
if (JERRY_LIKELY (ecma_op_array_is_fast_array (ext_object_p)
&& (uint32_t) int_value < ext_object_p->u.array.length))
{
ecma_value_t *values_p = ECMA_GET_NON_NULL_POINTER (ecma_value_t, object_p->u1.property_list_cp);
if (JERRY_LIKELY (!ecma_is_value_array_hole (values_p[int_value])))
{
return ecma_fast_copy_value (values_p[int_value]);
}
}
}
property_name_p = (ecma_string_t *) ECMA_CREATE_DIRECT_STRING (ECMA_DIRECT_STRING_UINT,
(uintptr_t) int_value);
}
}
else if (ecma_is_value_string (property))
{
property_name_p = ecma_get_string_from_value (property);
}
#if ENABLED (JERRY_ES2015)
if (ecma_is_value_symbol (property))
{
property_name_p = ecma_get_symbol_from_value (property);
}
#endif /* ENABLED (JERRY_ES2015) */
if (property_name_p != NULL)
{
#if ENABLED (JERRY_LCACHE)
ecma_property_t *property_p = ecma_lcache_lookup (object_p, property_name_p);
if (property_p != NULL &&
ECMA_PROPERTY_GET_TYPE (*property_p) == ECMA_PROPERTY_TYPE_NAMEDDATA)
{
return ecma_fast_copy_value (ECMA_PROPERTY_VALUE_PTR (property_p)->value);
}
#endif /* ENABLED (JERRY_LCACHE) */
/* There is no need to free the name. */
return ecma_op_object_get (object_p, property_name_p);
}
}
if (JERRY_UNLIKELY (ecma_is_value_undefined (object) || ecma_is_value_null (object)))
{
#if ENABLED (JERRY_ERROR_MESSAGES)
ecma_value_t error_value = ecma_raise_standard_error_with_format (ECMA_ERROR_TYPE,
"Cannot read property '%' of %",
property,
object);
#else /* !ENABLED (JERRY_ERROR_MESSAGES) */
ecma_value_t error_value = ecma_raise_type_error (NULL);
#endif /* ENABLED (JERRY_ERROR_MESSAGES) */
return error_value;
}
ecma_string_t *property_name_p = ecma_op_to_prop_name (property);
if (property_name_p == NULL)
{
return ECMA_VALUE_ERROR;
}
ecma_value_t get_value_result = ecma_op_get_value_object_base (object, property_name_p);
ecma_deref_ecma_string (property_name_p);
return get_value_result;
} /* vm_op_get_value */
/**
* Set the value of object[property].
*
* Note:
* this function frees its object and property arguments
*
* @return an ecma value which contains an error
* if the property setting is unsuccessful
*/
static ecma_value_t
vm_op_set_value (ecma_value_t object, /**< base object */
ecma_value_t property, /**< property name */
ecma_value_t value, /**< ecma value */
bool is_strict) /**< strict mode */
{
ecma_object_t * object_p;
if (JERRY_UNLIKELY (!ecma_is_value_object (object)))
{
ecma_value_t to_object = ecma_op_to_object (object);
ecma_free_value (object);
if (ECMA_IS_VALUE_ERROR (to_object))
{
#if ENABLED (JERRY_ERROR_MESSAGES)
ecma_free_value (to_object);
ecma_free_value (JERRY_CONTEXT (error_value));
ecma_value_t error_value = ecma_raise_standard_error_with_format (ECMA_ERROR_TYPE,
"Cannot set property '%' of %",
property,
object);
ecma_free_value (property);
return error_value;
#else /* !ENABLED (JERRY_ERROR_MESSAGES) */
ecma_free_value (property);
return to_object;
#endif /* ENABLED (JERRY_ERROR_MESSAGES) */
}
object_p = ecma_get_object_from_value (to_object);
ecma_set_object_extensible (object_p, false);
}
else
{
object_p = ecma_get_object_from_value (object);
}
ecma_string_t *property_p;
if (!ecma_is_value_prop_name (property))
{
property_p = ecma_op_to_prop_name (property);
ecma_fast_free_value (property);
if (JERRY_UNLIKELY (property_p == NULL))
{
ecma_deref_object (object_p);
return ECMA_VALUE_ERROR;
}
}
else
{
property_p = ecma_get_prop_name_from_value (property);
}
ecma_value_t completion_value = ECMA_VALUE_EMPTY;
if (!ecma_is_lexical_environment (object_p))
{
completion_value = ecma_op_object_put (object_p,
property_p,
value,
is_strict);
}
else
{
completion_value = ecma_op_set_mutable_binding (object_p,
property_p,
value,
is_strict);
}
ecma_deref_object (object_p);
ecma_deref_ecma_string (property_p);
return completion_value;
} /* vm_op_set_value */
/** Compact bytecode define */
#define CBC_OPCODE(arg1, arg2, arg3, arg4) arg4,
/**
* Decode table for both opcodes and extended opcodes.
*/
static const uint16_t vm_decode_table[] JERRY_ATTR_CONST_DATA =
{
CBC_OPCODE_LIST
CBC_EXT_OPCODE_LIST
};
#undef CBC_OPCODE
#if ENABLED (JERRY_ES2015_MODULE_SYSTEM)
/**
* Run ES2015 module code
*
* Note:
* returned value must be freed with ecma_free_value, when it is no longer needed.
*
* @return ecma value
*/
ecma_value_t
vm_run_module (const ecma_compiled_code_t *bytecode_p, /**< pointer to bytecode to run */
ecma_object_t *lex_env_p) /**< pointer to the specified lexenv to run in */
{
ecma_object_t *glob_obj_p = ecma_builtin_get_global ();
return vm_run (bytecode_p,
ecma_make_object_value (glob_obj_p),
lex_env_p,
false,
NULL,
0);
} /* vm_run_module */
#endif /* ENABLED (JERRY_ES2015_MODULE_SYSTEM) */
/**
* Run global code
*
* Note:
* returned value must be freed with ecma_free_value, when it is no longer needed.
*
* @return ecma value
*/
ecma_value_t
vm_run_global (const ecma_compiled_code_t *bytecode_p) /**< pointer to bytecode to run */
{
ecma_object_t *glob_obj_p = ecma_builtin_get_global ();
return vm_run (bytecode_p,
ecma_make_object_value (glob_obj_p),
ecma_get_global_environment (),
false,
NULL,
0);
} /* vm_run_global */
/**
* Run specified eval-mode bytecode
*
* @return ecma value
*/
ecma_value_t
vm_run_eval (ecma_compiled_code_t *bytecode_data_p, /**< byte-code data */
uint32_t parse_opts) /**< ecma_parse_opts_t option bits */
{
ecma_value_t this_binding;
ecma_object_t *lex_env_p;
/* ECMA-262 v5, 10.4.2 */
if (parse_opts & ECMA_PARSE_DIRECT_EVAL)
{
this_binding = ecma_copy_value (JERRY_CONTEXT (vm_top_context_p)->this_binding);
lex_env_p = JERRY_CONTEXT (vm_top_context_p)->lex_env_p;
#if ENABLED (JERRY_DEBUGGER)
uint32_t chain_index = parse_opts >> ECMA_PARSE_CHAIN_INDEX_SHIFT;
while (chain_index != 0)
{
if (JERRY_UNLIKELY (lex_env_p->u2.outer_reference_cp == JMEM_CP_NULL))
{
return ecma_raise_range_error (ECMA_ERR_MSG ("Invalid scope chain index for eval"));
}
lex_env_p = ECMA_GET_NON_NULL_POINTER (ecma_object_t, lex_env_p->u2.outer_reference_cp);
if ((ecma_get_lex_env_type (lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_THIS_OBJECT_BOUND)
|| (ecma_get_lex_env_type (lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_DECLARATIVE))
{
chain_index--;
}
}
#endif /* ENABLED (JERRY_DEBUGGER) */
}
else
{
ecma_object_t *global_obj_p = ecma_builtin_get_global ();
ecma_ref_object (global_obj_p);
this_binding = ecma_make_object_value (global_obj_p);
lex_env_p = ecma_get_global_environment ();
}
ecma_ref_object (lex_env_p);
if ((bytecode_data_p->status_flags & CBC_CODE_FLAGS_STRICT_MODE) != 0)
{
ecma_object_t *strict_lex_env_p = ecma_create_decl_lex_env (lex_env_p);
ecma_deref_object (lex_env_p);
lex_env_p = strict_lex_env_p;
}
ecma_value_t completion_value = vm_run (bytecode_data_p,
this_binding,
lex_env_p,
parse_opts,
NULL,
0);
ecma_deref_object (lex_env_p);
ecma_free_value (this_binding);
#if ENABLED (JERRY_SNAPSHOT_EXEC)
if (!(bytecode_data_p->status_flags & CBC_CODE_FLAGS_STATIC_FUNCTION))
{
ecma_bytecode_deref (bytecode_data_p);
}
#else /* !ENABLED (JERRY_SNAPSHOT_EXEC) */
ecma_bytecode_deref (bytecode_data_p);
#endif /* ENABLED (JERRY_SNAPSHOT_EXEC) */
return completion_value;
} /* vm_run_eval */
/**
* Construct object
*
* @return object value
*/
static ecma_value_t
vm_construct_literal_object (vm_frame_ctx_t *frame_ctx_p, /**< frame context */
ecma_value_t lit_value) /**< literal */
{
ecma_compiled_code_t *bytecode_p;
#if ENABLED (JERRY_SNAPSHOT_EXEC)
if (JERRY_LIKELY (!(frame_ctx_p->bytecode_header_p->status_flags & CBC_CODE_FLAGS_STATIC_FUNCTION)))
{
#endif /* ENABLED (JERRY_SNAPSHOT_EXEC) */
bytecode_p = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_compiled_code_t,
lit_value);
#if ENABLED (JERRY_SNAPSHOT_EXEC)
}
else
{
uint8_t *byte_p = ((uint8_t *) frame_ctx_p->bytecode_header_p) + lit_value;
bytecode_p = (ecma_compiled_code_t *) byte_p;
}
#endif /* ENABLED (JERRY_SNAPSHOT_EXEC) */
#if ENABLED (JERRY_BUILTIN_REGEXP)
if (!(bytecode_p->status_flags & CBC_CODE_FLAGS_FUNCTION))
{
ecma_value_t ret_value;
ret_value = ecma_op_create_regexp_object_from_bytecode ((re_compiled_code_t *) bytecode_p);
if (ECMA_IS_VALUE_ERROR (ret_value))
{
/* TODO: throw exception instead of define an 'undefined' value. */
return ECMA_VALUE_UNDEFINED;
}
return ret_value;
}
#endif /* ENABLED (JERRY_BUILTIN_REGEXP) */
JERRY_ASSERT (bytecode_p->status_flags & CBC_CODE_FLAGS_FUNCTION);
ecma_object_t *func_obj_p;
#if ENABLED (JERRY_ES2015)
if (!(bytecode_p->status_flags & CBC_CODE_FLAGS_ARROW_FUNCTION))
{
#endif /* ENABLED (JERRY_ES2015) */
func_obj_p = ecma_op_create_function_object (frame_ctx_p->lex_env_p,
bytecode_p);
#if ENABLED (JERRY_ES2015)
}
else
{
func_obj_p = ecma_op_create_arrow_function_object (frame_ctx_p->lex_env_p,
bytecode_p,
frame_ctx_p->this_binding);
}
#endif /* ENABLED (JERRY_ES2015) */
return ecma_make_object_value (func_obj_p);
} /* vm_construct_literal_object */
/**
* Get implicit this value
*
* @return true - if the implicit 'this' value is updated,
* false - otherwise
*/
static inline bool JERRY_ATTR_ALWAYS_INLINE
vm_get_implicit_this_value (ecma_value_t *this_value_p) /**< [in,out] this value */
{
if (ecma_is_value_object (*this_value_p))
{
ecma_object_t *this_obj_p = ecma_get_object_from_value (*this_value_p);
if (ecma_is_lexical_environment (this_obj_p))
{
ecma_value_t completion_value = ecma_op_implicit_this_value (this_obj_p);
JERRY_ASSERT (!ECMA_IS_VALUE_ERROR (completion_value));
*this_value_p = completion_value;
return true;
}
}
return false;
} /* vm_get_implicit_this_value */
/**
* Special bytecode sequence for error handling while the vm_loop
* is preserved for an execute operation
*/
static const uint8_t vm_error_byte_code_p[] =
{
CBC_EXT_OPCODE, CBC_EXT_ERROR
};
#if ENABLED (JERRY_ES2015)
/**
* 'super(...)' function call handler.
*/
static void
vm_super_call (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
{
JERRY_ASSERT (frame_ctx_p->call_operation == VM_EXEC_SUPER_CALL);
JERRY_ASSERT (frame_ctx_p->byte_code_p[0] == CBC_EXT_OPCODE);
uint8_t *byte_code_p = frame_ctx_p->byte_code_p + 3;
uint8_t opcode = byte_code_p[-2];
uint32_t arguments_list_len;
bool spread_arguments = opcode >= CBC_EXT_SPREAD_SUPER_CALL;
ecma_collection_t *collection_p = NULL;
ecma_value_t *arguments_p;
if (spread_arguments)
{
ecma_value_t collection = *(--frame_ctx_p->stack_top_p);
collection_p = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_collection_t, collection);
arguments_p = collection_p->buffer_p;
arguments_list_len = collection_p->item_count;
}
else
{
arguments_list_len = byte_code_p[-1];
arguments_p = frame_ctx_p->stack_top_p;
}
ecma_value_t func_value = *(--frame_ctx_p->stack_top_p);
ecma_value_t completion_value;
ecma_op_set_super_called (frame_ctx_p->lex_env_p);
ecma_value_t this_value = ecma_op_get_class_this_binding (frame_ctx_p->lex_env_p);
if (!ecma_is_constructor (func_value))
{
completion_value = ecma_raise_type_error (ECMA_ERR_MSG ("Class extends value is not a constructor."));
}
else
{
completion_value = ecma_op_function_construct (ecma_get_object_from_value (func_value),
this_value,
arguments_p,
arguments_list_len);
if (this_value != completion_value && ecma_is_value_object (completion_value))
{
ecma_op_set_class_prototype (completion_value, this_value);
ecma_op_set_class_this_binding (frame_ctx_p->lex_env_p, completion_value);
}
}
/* Free registers. */
for (uint32_t i = 0; i < arguments_list_len; i++)
{
ecma_fast_free_value (arguments_p[i]);
}
if (collection_p != NULL)
{
ecma_collection_destroy (collection_p);
}
ecma_free_value (func_value);
if (JERRY_UNLIKELY (ECMA_IS_VALUE_ERROR (completion_value)))
{
#if ENABLED (JERRY_DEBUGGER)
JERRY_CONTEXT (debugger_exception_byte_code_p) = frame_ctx_p->byte_code_p;
#endif /* ENABLED (JERRY_DEBUGGER) */
frame_ctx_p->byte_code_p = (uint8_t *) vm_error_byte_code_p;
}
else
{
frame_ctx_p->byte_code_p = byte_code_p;
uint32_t opcode_data = vm_decode_table[(CBC_END + 1) + opcode];
if (!(opcode_data & (VM_OC_PUT_STACK | VM_OC_PUT_BLOCK)))
{
ecma_fast_free_value (completion_value);
}
else if (opcode_data & VM_OC_PUT_STACK)
{
*frame_ctx_p->stack_top_p++ = completion_value;
}
else
{
ecma_fast_free_value (frame_ctx_p->block_result);
frame_ctx_p->block_result = completion_value;
}
}
} /* vm_super_call */
/**
* Perform one of the following call/construct operation with spreaded argument list
* - f(...args)
* - o.f(...args)
* - new O(...args)
*/
static void
vm_spread_operation (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
{
JERRY_ASSERT (frame_ctx_p->byte_code_p[0] == CBC_EXT_OPCODE);
uint8_t opcode = frame_ctx_p->byte_code_p[1];
ecma_value_t completion_value;
ecma_value_t collection = *(--frame_ctx_p->stack_top_p);
ecma_collection_t *collection_p = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_collection_t, collection);
ecma_value_t func_value = *(--frame_ctx_p->stack_top_p);
bool is_call_prop = opcode >= CBC_EXT_SPREAD_CALL_PROP;
if (frame_ctx_p->byte_code_p[1] == CBC_EXT_SPREAD_NEW)
{
if (!ecma_is_value_object (func_value)
|| !ecma_object_is_constructor (ecma_get_object_from_value (func_value)))
{
completion_value = ecma_raise_type_error (ECMA_ERR_MSG ("Expected a constructor."));
}
else
{
ecma_object_t *constructor_obj_p = ecma_get_object_from_value (func_value);
completion_value = ecma_op_function_construct (constructor_obj_p,
ECMA_VALUE_UNDEFINED,
collection_p->buffer_p,
collection_p->item_count);
}
}
else
{
ecma_value_t this_value = is_call_prop ? frame_ctx_p->stack_top_p[-2] : ECMA_VALUE_UNDEFINED;
if (!ecma_is_value_object (func_value)
|| !ecma_op_object_is_callable (ecma_get_object_from_value (func_value)))
{
completion_value = ecma_raise_type_error (ECMA_ERR_MSG ("Expected a function."));
}
else
{
ecma_object_t *func_obj_p = ecma_get_object_from_value (func_value);
completion_value = ecma_op_function_call (func_obj_p,
this_value,
collection_p->buffer_p,
collection_p->item_count);
}
if (is_call_prop)
{
ecma_free_value (*(--frame_ctx_p->stack_top_p));
ecma_free_value (*(--frame_ctx_p->stack_top_p));
}
}
ecma_collection_free (collection_p);
ecma_free_value (func_value);
if (JERRY_UNLIKELY (ECMA_IS_VALUE_ERROR (completion_value)))
{
#if ENABLED (JERRY_DEBUGGER)
JERRY_CONTEXT (debugger_exception_byte_code_p) = frame_ctx_p->byte_code_p;
#endif /* ENABLED (JERRY_DEBUGGER) */
frame_ctx_p->byte_code_p = (uint8_t *) vm_error_byte_code_p;
}
else
{
uint32_t opcode_data = vm_decode_table[(CBC_END + 1) + opcode];
if (!(opcode_data & (VM_OC_PUT_STACK | VM_OC_PUT_BLOCK)))
{
ecma_fast_free_value (completion_value);
}
else if (opcode_data & VM_OC_PUT_STACK)
{
*frame_ctx_p->stack_top_p++ = completion_value;
}
else
{
ecma_fast_free_value (frame_ctx_p->block_result);
frame_ctx_p->block_result = completion_value;
}
/* EXT_OPCODE, SPREAD_OPCODE, BYTE_ARG */
frame_ctx_p->byte_code_p += 3;
}
} /* vm_spread_operation */
#endif /* ENABLED (JERRY_ES2015) */
/**
* 'Function call' opcode handler.
*
* See also: ECMA-262 v5, 11.2.3
*/
static void
opfunc_call (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
{
uint8_t *byte_code_p = frame_ctx_p->byte_code_p + 1;
uint8_t opcode = byte_code_p[-1];
uint32_t arguments_list_len;
if (opcode >= CBC_CALL0)
{
arguments_list_len = (unsigned int) ((opcode - CBC_CALL0) / 6);
}
else
{
arguments_list_len = *byte_code_p++;
}
bool is_call_prop = ((opcode - CBC_CALL) % 6) >= 3;
ecma_value_t *stack_top_p = frame_ctx_p->stack_top_p - arguments_list_len;
ecma_value_t this_value = is_call_prop ? stack_top_p[-3] : ECMA_VALUE_UNDEFINED;
ecma_value_t func_value = stack_top_p[-1];
ecma_value_t completion_value;
if (!ecma_is_value_object (func_value)
|| !ecma_op_object_is_callable (ecma_get_object_from_value (func_value)))
{
completion_value = ecma_raise_type_error (ECMA_ERR_MSG ("Expected a function."));
}
else
{
ecma_object_t *func_obj_p = ecma_get_object_from_value (func_value);
completion_value = ecma_op_function_call (func_obj_p,
this_value,
stack_top_p,
arguments_list_len);
}
JERRY_CONTEXT (status_flags) &= (uint32_t) ~ECMA_STATUS_DIRECT_EVAL;
/* Free registers. */
for (uint32_t i = 0; i < arguments_list_len; i++)
{
ecma_fast_free_value (stack_top_p[i]);
}
if (is_call_prop)
{
ecma_free_value (*(--stack_top_p));
ecma_free_value (*(--stack_top_p));
}
if (JERRY_UNLIKELY (ECMA_IS_VALUE_ERROR (completion_value)))
{
#if ENABLED (JERRY_DEBUGGER)
JERRY_CONTEXT (debugger_exception_byte_code_p) = frame_ctx_p->byte_code_p;
#endif /* ENABLED (JERRY_DEBUGGER) */
frame_ctx_p->byte_code_p = (uint8_t *) vm_error_byte_code_p;
}
else
{
frame_ctx_p->byte_code_p = byte_code_p;
ecma_free_value (*(--stack_top_p));
uint32_t opcode_data = vm_decode_table[opcode];
if (!(opcode_data & (VM_OC_PUT_STACK | VM_OC_PUT_BLOCK)))
{
ecma_fast_free_value (completion_value);
}
else if (opcode_data & VM_OC_PUT_STACK)
{
*stack_top_p++ = completion_value;
}
else
{
ecma_fast_free_value (frame_ctx_p->block_result);
frame_ctx_p->block_result = completion_value;
}
}
frame_ctx_p->stack_top_p = stack_top_p;
} /* opfunc_call */
/**
* 'Constructor call' opcode handler.
*
* See also: ECMA-262 v5, 11.2.2
*/
static void
opfunc_construct (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
{
uint8_t *byte_code_p = frame_ctx_p->byte_code_p + 1;
uint8_t opcode = byte_code_p[-1];
unsigned int arguments_list_len;
if (opcode >= CBC_NEW0)
{
arguments_list_len = (unsigned int) (opcode - CBC_NEW0);
}
else
{
arguments_list_len = *byte_code_p++;
}
ecma_value_t *stack_top_p = frame_ctx_p->stack_top_p - arguments_list_len;
ecma_value_t constructor_value = stack_top_p[-1];
ecma_value_t completion_value;
if (!ecma_is_value_object (constructor_value)
|| !ecma_object_is_constructor (ecma_get_object_from_value (constructor_value)))
{
completion_value = ecma_raise_type_error (ECMA_ERR_MSG ("Expected a constructor."));
}
else
{
ecma_object_t *constructor_obj_p = ecma_get_object_from_value (constructor_value);
completion_value = ecma_op_function_construct (constructor_obj_p,
ECMA_VALUE_UNDEFINED,
stack_top_p,
arguments_list_len);
}
/* Free registers. */
for (uint32_t i = 0; i < arguments_list_len; i++)
{
ecma_fast_free_value (stack_top_p[i]);
}
if (JERRY_UNLIKELY (ECMA_IS_VALUE_ERROR (completion_value)))
{
#if ENABLED (JERRY_DEBUGGER)
JERRY_CONTEXT (debugger_exception_byte_code_p) = frame_ctx_p->byte_code_p;
#endif /* ENABLED (JERRY_DEBUGGER) */
frame_ctx_p->byte_code_p = (uint8_t *) vm_error_byte_code_p;
}
else
{
ecma_free_value (stack_top_p[-1]);
frame_ctx_p->byte_code_p = byte_code_p;
stack_top_p[-1] = completion_value;
}
frame_ctx_p->stack_top_p = stack_top_p;
} /* opfunc_construct */
/**
* Read literal index from the byte code stream into destination.
*
* @param destination destination
*/
#define READ_LITERAL_INDEX(destination) \
do \
{ \
(destination) = *byte_code_p++; \
if ((destination) >= encoding_limit) \
{ \
(destination) = (uint16_t) ((((destination) << 8) | *byte_code_p++) - encoding_delta); \
} \
} \
while (0)
/**
* Get literal value by literal index.
*
* @param literal_index literal index
* @param target_value target value
*
* TODO: For performance reasons, we define this as a macro.
* When we are able to construct a function with similar speed,
* we can remove this macro.
*/
#define READ_LITERAL(literal_index, target_value) \
do \
{ \
if ((literal_index) < ident_end) \
{ \
if ((literal_index) < register_end) \
{ \
/* Note: There should be no specialization for arguments. */ \
(target_value) = ecma_fast_copy_value (frame_ctx_p->registers_p[literal_index]); \
} \
else \
{ \
ecma_string_t *name_p = ecma_get_string_from_value (literal_start_p[literal_index]); \
\
result = ecma_op_resolve_reference_value (frame_ctx_p->lex_env_p, \
name_p); \
\
if (ECMA_IS_VALUE_ERROR (result)) \
{ \
goto error; \
} \
(target_value) = result; \
} \
} \
else if (literal_index < const_literal_end) \
{ \
(target_value) = ecma_fast_copy_value (literal_start_p[literal_index]); \
} \
else \
{ \
/* Object construction. */ \
(target_value) = vm_construct_literal_object (frame_ctx_p, \
literal_start_p[literal_index]); \
} \
} \
while (0)
/**
* Run initializer byte codes.
*
* @return ecma value
*/
static void
vm_init_loop (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
{
const ecma_compiled_code_t *bytecode_header_p = frame_ctx_p->bytecode_header_p;
uint8_t *byte_code_p = frame_ctx_p->byte_code_p;
uint16_t encoding_limit;
uint16_t encoding_delta;
uint16_t register_end;
ecma_value_t *literal_start_p = frame_ctx_p->literal_start_p;
bool is_strict = ((frame_ctx_p->bytecode_header_p->status_flags & CBC_CODE_FLAGS_STRICT_MODE) != 0);
/* Prepare. */
if (!(bytecode_header_p->status_flags & CBC_CODE_FLAGS_FULL_LITERAL_ENCODING))
{
encoding_limit = CBC_SMALL_LITERAL_ENCODING_LIMIT;
encoding_delta = CBC_SMALL_LITERAL_ENCODING_DELTA;
}
else
{
encoding_limit = CBC_FULL_LITERAL_ENCODING_LIMIT;
encoding_delta = CBC_FULL_LITERAL_ENCODING_DELTA;
}
if (frame_ctx_p->bytecode_header_p->status_flags & CBC_CODE_FLAGS_UINT16_ARGUMENTS)
{
cbc_uint16_arguments_t *args_p = (cbc_uint16_arguments_t *) (frame_ctx_p->bytecode_header_p);
register_end = args_p->register_end;
}
else
{
cbc_uint8_arguments_t *args_p = (cbc_uint8_arguments_t *) (frame_ctx_p->bytecode_header_p);
register_end = args_p->register_end;
}
while (true)
{
uint8_t type = *byte_code_p;
switch (type)
{
case CBC_CREATE_LOCAL:
#if ENABLED (JERRY_ES2015)
case CBC_CREATE_LET:
case CBC_CREATE_CONST:
case CBC_CREATE_DESTRUCTURED_ARG:
#endif /* ENABLED (JERRY_ES2015) */
{
uint32_t literal_index;
byte_code_p++;
READ_LITERAL_INDEX (literal_index);
ecma_string_t *name_p = ecma_get_string_from_value (literal_start_p[literal_index]);
JERRY_ASSERT (ecma_get_lex_env_type (frame_ctx_p->lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_DECLARATIVE);
JERRY_ASSERT (ecma_find_named_property (frame_ctx_p->lex_env_p, name_p) == NULL);
uint8_t prop_attributes = ECMA_PROPERTY_FLAG_WRITABLE;
#if ENABLED (JERRY_ES2015)
if (type == CBC_CREATE_LET)
{
prop_attributes = ECMA_PROPERTY_ENUMERABLE_WRITABLE;
}
else if (type == CBC_CREATE_CONST)
{
prop_attributes = ECMA_PROPERTY_FLAG_ENUMERABLE;
}
ecma_property_value_t *property_value_p;
property_value_p = ecma_create_named_data_property (frame_ctx_p->lex_env_p, name_p, prop_attributes, NULL);
if (type != CBC_CREATE_LOCAL)
{
property_value_p->value = ECMA_VALUE_UNINITIALIZED;
}
#else /* !ENABLED (JERRY_ES2015) */
ecma_create_named_data_property (frame_ctx_p->lex_env_p, name_p, prop_attributes, NULL);
#endif /* ENABLED (JERRY_ES2015) */
break;
}
case CBC_INIT_LOCAL:
{
uint32_t literal_index, value_index;
ecma_value_t lit_value;
byte_code_p++;
READ_LITERAL_INDEX (value_index);
READ_LITERAL_INDEX (literal_index);
JERRY_ASSERT (value_index != literal_index);
JERRY_ASSERT (value_index >= register_end || literal_index >= register_end);
if (value_index < register_end)
{
/* Take (not copy) the reference. */
lit_value = ecma_copy_value_if_not_object (frame_ctx_p->registers_p[value_index]);
}
else
{
lit_value = vm_construct_literal_object (frame_ctx_p,
literal_start_p[value_index]);
}
if (literal_index < register_end)
{
ecma_fast_free_value (frame_ctx_p->registers_p[literal_index]);
frame_ctx_p->registers_p[literal_index] = lit_value;
break;
}
ecma_string_t *name_p = ecma_get_string_from_value (literal_start_p[literal_index]);
JERRY_ASSERT (ecma_get_lex_env_type (frame_ctx_p->lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_DECLARATIVE);
JERRY_ASSERT (ecma_find_named_property (frame_ctx_p->lex_env_p, name_p) == NULL);
ecma_property_value_t *property_value_p;
property_value_p = ecma_create_named_data_property (frame_ctx_p->lex_env_p,
name_p,
ECMA_PROPERTY_FLAG_WRITABLE,
NULL);
JERRY_ASSERT (property_value_p->value == ECMA_VALUE_UNDEFINED);
property_value_p->value = lit_value;
if (value_index >= register_end)
{
ecma_free_value (lit_value);
}
break;
}
case CBC_CREATE_VAR_EVAL:
case CBC_CREATE_VAR_FUNC_EVAL:
{
uint32_t literal_index;
ecma_value_t lit_value = ECMA_VALUE_UNDEFINED;
byte_code_p++;
if (type == CBC_CREATE_VAR_FUNC_EVAL)
{
uint32_t value_index;
READ_LITERAL_INDEX (value_index);
lit_value = vm_construct_literal_object (frame_ctx_p,
literal_start_p[value_index]);
}
READ_LITERAL_INDEX (literal_index);
ecma_string_t *name_p = ecma_get_string_from_value (literal_start_p[literal_index]);
ecma_object_t *lex_env_p = frame_ctx_p->lex_env_p;
while (lex_env_p->type_flags_refs & ECMA_OBJECT_FLAG_BLOCK)
{
#if ENABLED (JERRY_ES2015) && !(defined JERRY_NDEBUG)
if (ecma_get_lex_env_type (lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_DECLARATIVE)
{
ecma_property_t *property_p = ecma_find_named_property (lex_env_p, name_p);
JERRY_ASSERT (property_p == NULL || !(*property_p & ECMA_PROPERTY_FLAG_ENUMERABLE));
}
#endif /* ENABLED (JERRY_ES2015) && !JERRY_NDEBUG */
JERRY_ASSERT (lex_env_p->u2.outer_reference_cp != JMEM_CP_NULL);
lex_env_p = ECMA_GET_NON_NULL_POINTER (ecma_object_t, lex_env_p->u2.outer_reference_cp);
}
#if ENABLED (JERRY_ES2015) && !(defined JERRY_NDEBUG)
if (ecma_get_lex_env_type (lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_DECLARATIVE)
{
ecma_property_t *property_p = ecma_find_named_property (lex_env_p, name_p);
JERRY_ASSERT (property_p == NULL || !(*property_p & ECMA_PROPERTY_FLAG_ENUMERABLE));
}
#endif /* ENABLED (JERRY_ES2015) && !JERRY_NDEBUG */
vm_var_decl (lex_env_p, name_p, frame_ctx_p->is_eval_code);
if (lit_value != ECMA_VALUE_UNDEFINED)
{
vm_set_var (lex_env_p, name_p, is_strict, lit_value);
}
break;
}
case CBC_SET_VAR_FUNC:
{
uint32_t literal_index, value_index;
ecma_value_t lit_value;
byte_code_p++;
READ_LITERAL_INDEX (value_index);
READ_LITERAL_INDEX (literal_index);
JERRY_ASSERT (value_index != literal_index && value_index >= register_end);
lit_value = vm_construct_literal_object (frame_ctx_p,
literal_start_p[value_index]);
if (literal_index < register_end)
{
ecma_fast_free_value (frame_ctx_p->registers_p[literal_index]);
frame_ctx_p->registers_p[literal_index] = lit_value;
break;
}
ecma_string_t *name_p = ecma_get_string_from_value (literal_start_p[literal_index]);
vm_set_var (frame_ctx_p->lex_env_p, name_p, is_strict, lit_value);
break;
}
#if ENABLED (JERRY_SNAPSHOT_EXEC)
case CBC_SET_BYTECODE_PTR:
{
memcpy (&byte_code_p, byte_code_p + 1, sizeof (uint8_t *));
frame_ctx_p->byte_code_start_p = byte_code_p;
break;
}
#endif /* ENABLED (JERRY_SNAPSHOT_EXEC) */
default:
{
frame_ctx_p->byte_code_p = byte_code_p;
return;
}
}
}
} /* vm_init_loop */
/**
* Run generic byte code.
*
* @return ecma value
*/
static ecma_value_t JERRY_ATTR_NOINLINE
vm_loop (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
{
const ecma_compiled_code_t *bytecode_header_p = frame_ctx_p->bytecode_header_p;
uint8_t *byte_code_p = frame_ctx_p->byte_code_p;
ecma_value_t *literal_start_p = frame_ctx_p->literal_start_p;
ecma_value_t *stack_top_p;
uint16_t encoding_limit;
uint16_t encoding_delta;
uint16_t register_end;
uint16_t ident_end;
uint16_t const_literal_end;
int32_t branch_offset = 0;
uint8_t branch_offset_length = 0;
ecma_value_t left_value;
ecma_value_t right_value;
ecma_value_t result = ECMA_VALUE_EMPTY;
bool is_strict = ((frame_ctx_p->bytecode_header_p->status_flags & CBC_CODE_FLAGS_STRICT_MODE) != 0);
/* Prepare for byte code execution. */
if (!(bytecode_header_p->status_flags & CBC_CODE_FLAGS_FULL_LITERAL_ENCODING))
{
encoding_limit = CBC_SMALL_LITERAL_ENCODING_LIMIT;
encoding_delta = CBC_SMALL_LITERAL_ENCODING_DELTA;
}
else
{
encoding_limit = CBC_FULL_LITERAL_ENCODING_LIMIT;
encoding_delta = CBC_FULL_LITERAL_ENCODING_DELTA;
}
if (bytecode_header_p->status_flags & CBC_CODE_FLAGS_UINT16_ARGUMENTS)
{
cbc_uint16_arguments_t *args_p = (cbc_uint16_arguments_t *) (bytecode_header_p);
register_end = args_p->register_end;
ident_end = args_p->ident_end;
const_literal_end = args_p->const_literal_end;
}
else
{
cbc_uint8_arguments_t *args_p = (cbc_uint8_arguments_t *) (bytecode_header_p);
register_end = args_p->register_end;
ident_end = args_p->ident_end;
const_literal_end = args_p->const_literal_end;
}
stack_top_p = frame_ctx_p->stack_top_p;
/* Outer loop for exception handling. */
while (true)
{
/* Internal loop for byte code execution. */
while (true)
{
uint8_t *byte_code_start_p = byte_code_p;
uint8_t opcode = *byte_code_p++;
uint32_t opcode_data = opcode;
if (opcode == CBC_EXT_OPCODE)
{
opcode = *byte_code_p++;
opcode_data = (uint32_t) ((CBC_END + 1) + opcode);
}
opcode_data = vm_decode_table[opcode_data];
left_value = ECMA_VALUE_UNDEFINED;
right_value = ECMA_VALUE_UNDEFINED;
uint32_t operands = VM_OC_GET_ARGS_INDEX (opcode_data);
if (operands >= VM_OC_GET_LITERAL)
{
uint16_t literal_index;
READ_LITERAL_INDEX (literal_index);
READ_LITERAL (literal_index, left_value);
if (operands != VM_OC_GET_LITERAL)
{
switch (operands)
{
case VM_OC_GET_LITERAL_LITERAL:
{
uint16_t second_literal_index;
READ_LITERAL_INDEX (second_literal_index);
READ_LITERAL (second_literal_index, right_value);
break;
}
case VM_OC_GET_STACK_LITERAL:
{
JERRY_ASSERT (stack_top_p > frame_ctx_p->registers_p + register_end);
right_value = left_value;
left_value = *(--stack_top_p);
break;
}
default:
{
JERRY_ASSERT (operands == VM_OC_GET_THIS_LITERAL);
right_value = left_value;
left_value = ecma_copy_value (frame_ctx_p->this_binding);
break;
}
}
}
}
else if (operands >= VM_OC_GET_STACK)
{
JERRY_ASSERT (operands == VM_OC_GET_STACK
|| operands == VM_OC_GET_STACK_STACK);
JERRY_ASSERT (stack_top_p > frame_ctx_p->registers_p + register_end);
left_value = *(--stack_top_p);
if (operands == VM_OC_GET_STACK_STACK)
{
JERRY_ASSERT (stack_top_p > frame_ctx_p->registers_p + register_end);
right_value = left_value;
left_value = *(--stack_top_p);
}
}
else if (operands == VM_OC_GET_BRANCH)
{
branch_offset_length = CBC_BRANCH_OFFSET_LENGTH (opcode);
JERRY_ASSERT (branch_offset_length >= 1 && branch_offset_length <= 3);
branch_offset = *(byte_code_p++);
if (JERRY_UNLIKELY (branch_offset_length != 1))
{
branch_offset <<= 8;
branch_offset |= *(byte_code_p++);
if (JERRY_UNLIKELY (branch_offset_length == 3))
{
branch_offset <<= 8;
branch_offset |= *(byte_code_p++);
}
}
if (opcode_data & VM_OC_BACKWARD_BRANCH)
{
#if ENABLED (JERRY_VM_EXEC_STOP)
if (JERRY_CONTEXT (vm_exec_stop_cb) != NULL
&& --JERRY_CONTEXT (vm_exec_stop_counter) == 0)
{
result = JERRY_CONTEXT (vm_exec_stop_cb) (JERRY_CONTEXT (vm_exec_stop_user_p));
if (ecma_is_value_undefined (result))
{
JERRY_CONTEXT (vm_exec_stop_counter) = JERRY_CONTEXT (vm_exec_stop_frequency);
}
else
{
JERRY_CONTEXT (vm_exec_stop_counter) = 1;
if (!ecma_is_value_error_reference (result))
{
JERRY_CONTEXT (error_value) = result;
}
else
{
JERRY_CONTEXT (error_value) = ecma_clear_error_reference (result, false);
}
JERRY_CONTEXT (status_flags) &= (uint32_t) ~ECMA_STATUS_EXCEPTION;
result = ECMA_VALUE_ERROR;
goto error;
}
}
#endif /* ENABLED (JERRY_VM_EXEC_STOP) */
branch_offset = -branch_offset;
}
}
switch (VM_OC_GROUP_GET_INDEX (opcode_data))
{
case VM_OC_POP:
{
JERRY_ASSERT (stack_top_p > frame_ctx_p->registers_p + register_end);
ecma_free_value (*(--stack_top_p));
continue;
}
case VM_OC_POP_BLOCK:
{
ecma_fast_free_value (frame_ctx_p->block_result);
frame_ctx_p->block_result = *(--stack_top_p);
continue;
}
case VM_OC_PUSH:
{
*stack_top_p++ = left_value;
continue;
}
case VM_OC_PUSH_TWO:
{
*stack_top_p++ = left_value;
*stack_top_p++ = right_value;
continue;
}
case VM_OC_PUSH_THREE:
{
uint16_t literal_index;
*stack_top_p++ = left_value;
left_value = ECMA_VALUE_UNDEFINED;
READ_LITERAL_INDEX (literal_index);
READ_LITERAL (literal_index, left_value);
*stack_top_p++ = right_value;
*stack_top_p++ = left_value;
continue;
}
case VM_OC_PUSH_UNDEFINED:
{
*stack_top_p++ = ECMA_VALUE_UNDEFINED;
continue;
}
case VM_OC_PUSH_TRUE:
{
*stack_top_p++ = ECMA_VALUE_TRUE;
continue;
}
case VM_OC_PUSH_FALSE:
{
*stack_top_p++ = ECMA_VALUE_FALSE;
continue;
}
case VM_OC_PUSH_NULL:
{
*stack_top_p++ = ECMA_VALUE_NULL;
continue;
}
case VM_OC_PUSH_THIS:
{
*stack_top_p++ = ecma_copy_value (frame_ctx_p->this_binding);
continue;
}
case VM_OC_PUSH_0:
{
*stack_top_p++ = ecma_make_integer_value (0);
continue;
}
case VM_OC_PUSH_POS_BYTE:
{
ecma_integer_value_t number = *byte_code_p++;
*stack_top_p++ = ecma_make_integer_value (number + 1);
continue;
}
case VM_OC_PUSH_NEG_BYTE:
{
ecma_integer_value_t number = *byte_code_p++;
*stack_top_p++ = ecma_make_integer_value (-(number + 1));
continue;
}
case VM_OC_PUSH_LIT_0:
{
stack_top_p[0] = left_value;
stack_top_p[1] = ecma_make_integer_value (0);
stack_top_p += 2;
continue;
}
case VM_OC_PUSH_LIT_POS_BYTE:
{
ecma_integer_value_t number = *byte_code_p++;
stack_top_p[0] = left_value;
stack_top_p[1] = ecma_make_integer_value (number + 1);
stack_top_p += 2;
continue;
}
case VM_OC_PUSH_LIT_NEG_BYTE:
{
ecma_integer_value_t number = *byte_code_p++;
stack_top_p[0] = left_value;
stack_top_p[1] = ecma_make_integer_value (-(number + 1));
stack_top_p += 2;
continue;
}
case VM_OC_PUSH_OBJECT:
{
ecma_object_t *obj_p = ecma_create_object (ecma_builtin_get (ECMA_BUILTIN_ID_OBJECT_PROTOTYPE),
0,
ECMA_OBJECT_TYPE_GENERAL);
*stack_top_p++ = ecma_make_object_value (obj_p);
continue;
}
case VM_OC_PUSH_NAMED_FUNC_EXPR:
{
ecma_object_t *func_p = ecma_get_object_from_value (left_value);
JERRY_ASSERT (ecma_get_object_type (func_p) == ECMA_OBJECT_TYPE_FUNCTION);
ecma_extended_object_t *ext_func_p = (ecma_extended_object_t *) func_p;
JERRY_ASSERT (frame_ctx_p->lex_env_p == ECMA_GET_INTERNAL_VALUE_POINTER (ecma_object_t,
ext_func_p->u.function.scope_cp));
ecma_object_t *name_lex_env = ecma_create_decl_lex_env (frame_ctx_p->lex_env_p);
ecma_op_create_immutable_binding (name_lex_env, ecma_get_string_from_value (right_value), left_value);
ECMA_SET_INTERNAL_VALUE_POINTER (ext_func_p->u.function.scope_cp, name_lex_env);
ecma_free_value (right_value);
ecma_deref_object (name_lex_env);
*stack_top_p++ = left_value;
continue;
}
#if ENABLED (JERRY_ES2015)
case VM_OC_INIT_LOCALS:
{
frame_ctx_p->byte_code_p = byte_code_start_p;
vm_init_loop (frame_ctx_p);
byte_code_p = frame_ctx_p->byte_code_p;
continue;
}
case VM_OC_ASSIGN_LET_CONST:
{
uint32_t literal_index;
READ_LITERAL_INDEX (literal_index);
JERRY_ASSERT (literal_index >= register_end);
JERRY_ASSERT (ecma_get_lex_env_type (frame_ctx_p->lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_DECLARATIVE);
ecma_string_t *name_p = ecma_get_string_from_value (literal_start_p[literal_index]);
ecma_property_t *property_p = ecma_find_named_property (frame_ctx_p->lex_env_p, name_p);
JERRY_ASSERT (property_p != NULL
&& ECMA_PROPERTY_GET_TYPE (*property_p) == ECMA_PROPERTY_TYPE_NAMEDDATA);
JERRY_ASSERT (ECMA_PROPERTY_VALUE_PTR (property_p)->value == ECMA_VALUE_UNINITIALIZED);
ECMA_PROPERTY_VALUE_PTR (property_p)->value = left_value;
if (ecma_is_value_object (left_value))
{
ecma_deref_object (ecma_get_object_from_value (left_value));
}
continue;
}
case VM_OC_CLONE_CONTEXT:
{
JERRY_ASSERT (byte_code_start_p[0] == CBC_EXT_OPCODE);
bool copy_values = (byte_code_start_p[1] == CBC_EXT_CLONE_FULL_CONTEXT);
frame_ctx_p->lex_env_p = ecma_clone_decl_lexical_environment (frame_ctx_p->lex_env_p, copy_values);
continue;
}
case VM_OC_SET_COMPUTED_PROPERTY:
{
/* Swap values. */
left_value ^= right_value;
right_value ^= left_value;
left_value ^= right_value;
/* FALLTHRU */
}
#endif /* ENABLED (JERRY_ES2015) */
case VM_OC_SET_PROPERTY:
{
JERRY_STATIC_ASSERT (VM_OC_NON_STATIC_FLAG == VM_OC_BACKWARD_BRANCH,
vm_oc_non_static_flag_must_be_equal_to_vm_oc_backward_branch);
JERRY_ASSERT ((opcode_data >> VM_OC_NON_STATIC_SHIFT) <= 0x1);
ecma_string_t *prop_name_p = ecma_op_to_prop_name (right_value);
if (JERRY_UNLIKELY (prop_name_p == NULL))
{
result = ECMA_VALUE_ERROR;
goto error;
}
#if ENABLED (JERRY_ES2015)
if (JERRY_UNLIKELY (ecma_compare_ecma_string_to_magic_id (prop_name_p, LIT_MAGIC_STRING_PROTOTYPE))
&& !(opcode_data & VM_OC_NON_STATIC_FLAG))
{
result = ecma_raise_type_error (ECMA_ERR_MSG ("prototype property of a class is non-configurable"));
goto error;
}
const int index = (int) (opcode_data >> VM_OC_NON_STATIC_SHIFT) - 2;
#else /* !ENABLED (JERRY_ES2015) */
const int index = -1;
#endif /* ENABLED (JERRY_ES2015) */
ecma_object_t *object_p = ecma_get_object_from_value (stack_top_p[index]);
JERRY_ASSERT (!ecma_op_object_is_fast_array (object_p));
ecma_property_t *property_p = ecma_find_named_property (object_p, prop_name_p);
if (property_p != NULL
&& ECMA_PROPERTY_GET_TYPE (*property_p) != ECMA_PROPERTY_TYPE_NAMEDDATA)
{
ecma_delete_property (object_p, ECMA_PROPERTY_VALUE_PTR (property_p));
property_p = NULL;
}
ecma_property_value_t *prop_value_p;
if (property_p == NULL)
{
prop_value_p = ecma_create_named_data_property (object_p,
prop_name_p,
ECMA_PROPERTY_CONFIGURABLE_ENUMERABLE_WRITABLE,
NULL);
}
else
{
prop_value_p = ECMA_PROPERTY_VALUE_PTR (property_p);
}
ecma_named_data_property_assign_value (object_p, prop_value_p, left_value);
ecma_deref_ecma_string (prop_name_p);
goto free_both_values;
}
case VM_OC_SET_GETTER:
case VM_OC_SET_SETTER:
{
JERRY_ASSERT ((opcode_data >> VM_OC_NON_STATIC_SHIFT) <= 0x1);
ecma_string_t *prop_name_p = ecma_op_to_prop_name (left_value);
if (JERRY_UNLIKELY (prop_name_p == NULL))
{
result = ECMA_VALUE_ERROR;
goto error;
}
#if ENABLED (JERRY_ES2015)
if (JERRY_UNLIKELY (ecma_compare_ecma_string_to_magic_id (prop_name_p, LIT_MAGIC_STRING_PROTOTYPE))
&& !(opcode_data & VM_OC_NON_STATIC_FLAG))
{
result = ecma_raise_type_error (ECMA_ERR_MSG ("prototype property of a class is non-configurable"));
goto error;
}
const int index = (int) (opcode_data >> VM_OC_NON_STATIC_SHIFT) - 2;
#else /* !ENABLED (JERRY_ES2015) */
const int index = -1;
#endif /* ENABLED (JERRY_ES2015) */
opfunc_set_accessor (VM_OC_GROUP_GET_INDEX (opcode_data) == VM_OC_SET_GETTER,
stack_top_p[index],
prop_name_p,
right_value);
ecma_deref_ecma_string (prop_name_p);
goto free_both_values;
}
case VM_OC_PUSH_ARRAY:
{
// Note: this operation cannot throw an exception
*stack_top_p++ = ecma_make_object_value (ecma_op_new_fast_array_object (0));
continue;
}
#if ENABLED (JERRY_ES2015)
case VM_OC_SUPER_CALL:
{
uint8_t arguments_list_len = *byte_code_p++;
if (opcode >= CBC_EXT_SPREAD_SUPER_CALL)
{
ecma_collection_t *arguments_p = opfunc_spread_arguments (&stack_top_p, arguments_list_len);
if (JERRY_UNLIKELY (arguments_p == NULL))
{
result = ECMA_VALUE_ERROR;
goto error;
}
stack_top_p++;
ECMA_SET_INTERNAL_VALUE_POINTER (stack_top_p[-1], arguments_p);
}
else
{
stack_top_p -= arguments_list_len;
}
frame_ctx_p->call_operation = VM_EXEC_SUPER_CALL;
frame_ctx_p->byte_code_p = byte_code_start_p;
frame_ctx_p->stack_top_p = stack_top_p;
return ECMA_VALUE_UNDEFINED;
}
case VM_OC_CLASS_HERITAGE:
{
ecma_value_t super_value = *(--stack_top_p);
ecma_object_t *super_class_p;
branch_offset += (int32_t) (byte_code_start_p - frame_ctx_p->byte_code_start_p);
if (ecma_is_value_null (super_value))
{
super_class_p = ecma_create_object (ecma_builtin_get (ECMA_BUILTIN_ID_OBJECT_PROTOTYPE),
0,
ECMA_OBJECT_TYPE_GENERAL);
}
else
{
result = ecma_op_to_object (super_value);
ecma_free_value (super_value);
if (ECMA_IS_VALUE_ERROR (result) || !ecma_is_constructor (result))
{
if (ECMA_IS_VALUE_ERROR (result))
{
ecma_free_value (JERRY_CONTEXT (error_value));
}
ecma_free_value (result);
result = ecma_raise_type_error ("Value provided by class extends is not an object or null.");
goto error;
}
else
{
super_class_p = ecma_get_object_from_value (result);
}
}
ecma_object_t *super_env_p = ecma_create_object_lex_env (frame_ctx_p->lex_env_p,
super_class_p,
ECMA_LEXICAL_ENVIRONMENT_SUPER_OBJECT_BOUND);
ecma_deref_object (super_class_p);
VM_PLUS_EQUAL_U16 (frame_ctx_p->context_depth, PARSER_SUPER_CLASS_CONTEXT_STACK_ALLOCATION);
stack_top_p += PARSER_SUPER_CLASS_CONTEXT_STACK_ALLOCATION;
stack_top_p[-1] = VM_CREATE_CONTEXT_WITH_ENV (VM_CONTEXT_SUPER_CLASS, branch_offset);
frame_ctx_p->lex_env_p = super_env_p;
continue;
}
case VM_OC_CLASS_INHERITANCE:
{
ecma_value_t child_value = stack_top_p[-2];
ecma_value_t child_prototype_value = stack_top_p[-1];
ecma_object_t *child_class_p = ecma_get_object_from_value (child_value);
ecma_object_t *child_prototype_class_p = ecma_get_object_from_value (child_prototype_value);
ecma_object_t *super_class_p = ecma_get_lex_env_binding_object (frame_ctx_p->lex_env_p);
if (super_class_p->u2.prototype_cp != JMEM_CP_NULL)
{
ecma_value_t super_prototype_value = ecma_op_object_get_by_magic_id (super_class_p,
LIT_MAGIC_STRING_PROTOTYPE);
if (ECMA_IS_VALUE_ERROR (super_prototype_value))
{
result = super_prototype_value;
goto error;
}
if (ecma_get_object_type (super_class_p) == ECMA_OBJECT_TYPE_BOUND_FUNCTION
&& !ecma_is_value_object (super_prototype_value))
{
ecma_free_value (super_prototype_value);
result = ecma_raise_type_error (ECMA_ERR_MSG ("Class extends value does not have valid "
"prototype property."));
goto error;
}
if (!(ECMA_IS_VALUE_ERROR (super_prototype_value) || !ecma_is_value_object (super_prototype_value)))
{
ecma_object_t *super_prototype_class_p = ecma_get_object_from_value (super_prototype_value);
ECMA_SET_NON_NULL_POINTER (child_prototype_class_p->u2.prototype_cp, super_prototype_class_p);
ECMA_SET_NON_NULL_POINTER (child_class_p->u2.prototype_cp, super_class_p);
}
ecma_free_value (super_prototype_value);
}
continue;
}
case VM_OC_PUSH_CLASS_CONSTRUCTOR_AND_PROTOTYPE:
{
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_extended_object_t),
ECMA_OBJECT_TYPE_EXTERNAL_FUNCTION);
ecma_extended_object_t *ext_func_obj_p = (ecma_extended_object_t *) function_obj_p;
ext_func_obj_p->u.external_handler_cb = ecma_op_function_implicit_constructor_handler_cb;
ecma_value_t function_obj_value = ecma_make_object_value (function_obj_p);
*stack_top_p++ = function_obj_value;
ecma_object_t *prototype_class_p = ecma_create_object (ecma_builtin_get (ECMA_BUILTIN_ID_OBJECT_PROTOTYPE),
0,
ECMA_OBJECT_TYPE_GENERAL);
*stack_top_p++ = ecma_make_object_value (prototype_class_p);
/* 14.5.14.18 Set constructor to prototype */
ecma_property_value_t *prop_value_p;
prop_value_p = ecma_create_named_data_property (prototype_class_p,
ecma_get_magic_string (LIT_MAGIC_STRING_CONSTRUCTOR),
ECMA_PROPERTY_CONFIGURABLE_WRITABLE,
NULL);
ecma_named_data_property_assign_value (prototype_class_p, prop_value_p, function_obj_value);
continue;
}
case VM_OC_SET_CLASS_CONSTRUCTOR:
{
ecma_object_t *new_constructor_obj_p = ecma_get_object_from_value (left_value);
ecma_object_t *current_constructor_obj_p = ecma_get_object_from_value (stack_top_p[-2]);
ecma_extended_object_t *new_ext_func_obj_p = (ecma_extended_object_t *) new_constructor_obj_p;
ecma_extended_object_t *current_ext_func_obj_p = (ecma_extended_object_t *) current_constructor_obj_p;
uint16_t type_flags_refs = current_constructor_obj_p->type_flags_refs;
const int new_type = ECMA_OBJECT_TYPE_FUNCTION - ECMA_OBJECT_TYPE_EXTERNAL_FUNCTION;
current_constructor_obj_p->type_flags_refs = (uint16_t) (type_flags_refs + new_type);
ecma_compiled_code_t *bytecode_p;
bytecode_p = (ecma_compiled_code_t *) ecma_op_function_get_compiled_code (new_ext_func_obj_p);
bytecode_p->status_flags |= CBC_CODE_FLAGS_CONSTRUCTOR;
ecma_bytecode_ref ((ecma_compiled_code_t *) bytecode_p);
ECMA_SET_INTERNAL_VALUE_POINTER (current_ext_func_obj_p->u.function.bytecode_cp,
bytecode_p);
ECMA_SET_INTERNAL_VALUE_POINTER (current_ext_func_obj_p->u.function.scope_cp,
ECMA_GET_INTERNAL_VALUE_POINTER (const ecma_object_t,
new_ext_func_obj_p->u.function.scope_cp));
ecma_deref_object (new_constructor_obj_p);
continue;
}
case VM_OC_PUSH_IMPL_CONSTRUCTOR:
{
ecma_object_t *current_constructor_obj_p = ecma_get_object_from_value (stack_top_p[-2]);
uint16_t type_flags_refs = current_constructor_obj_p->type_flags_refs;
const int new_type = ECMA_OBJECT_TYPE_BOUND_FUNCTION - ECMA_OBJECT_TYPE_EXTERNAL_FUNCTION;
current_constructor_obj_p->type_flags_refs = (uint16_t) (type_flags_refs + new_type);
ecma_extended_object_t *ext_function_p = (ecma_extended_object_t *) current_constructor_obj_p;
ecma_object_t *super_obj_p = ecma_op_resolve_super_reference_value (frame_ctx_p->lex_env_p);
ECMA_SET_INTERNAL_VALUE_POINTER (ext_function_p->u.bound_function.target_function,
super_obj_p);
ext_function_p->u.bound_function.args_len_or_this = ECMA_VALUE_IMPLICIT_CONSTRUCTOR;
continue;
}
case VM_OC_CLASS_EXPR_CONTEXT_END:
{
JERRY_ASSERT (VM_GET_CONTEXT_TYPE (stack_top_p[-2]) == VM_CONTEXT_SUPER_CLASS);
stack_top_p = vm_stack_context_abort (frame_ctx_p, stack_top_p - 1);
stack_top_p++;
stack_top_p[-1] = *stack_top_p;
continue;
}
case VM_OC_CLASS_EVAL:
{
ECMA_CLEAR_SUPER_EVAL_PARSER_OPTS ();
ECMA_SET_SUPER_EVAL_PARSER_OPTS (*byte_code_p++);
continue;
}
case VM_OC_PUSH_CONSTRUCTOR_SUPER:
{
JERRY_ASSERT (byte_code_start_p[0] == CBC_EXT_OPCODE);
bool is_super_called = ecma_op_is_super_called (frame_ctx_p->lex_env_p);
if (byte_code_start_p[1] != CBC_EXT_PUSH_CONSTRUCTOR_SUPER_PROP)
{
/* Calling super(...) */
if (is_super_called)
{
result = ecma_raise_reference_error (ECMA_ERR_MSG ("Super constructor may only be called once."));
goto error;
}
}
else if (!is_super_called)
{
/* Reference to super.method or super["method"] */
result = ecma_raise_reference_error (ECMA_ERR_MSG ("Must call super constructor in derived class before "
"accessing 'super'."));
goto error;
}
/* FALLTHRU */
}
case VM_OC_PUSH_SUPER:
{
JERRY_ASSERT (byte_code_start_p[0] == CBC_EXT_OPCODE);
if (byte_code_start_p[1] == CBC_EXT_PUSH_SUPER
|| byte_code_start_p[1] == CBC_EXT_PUSH_CONSTRUCTOR_SUPER_PROP)
{
ecma_object_t *super_class_p = ecma_op_resolve_super_reference_value (frame_ctx_p->lex_env_p);
ecma_value_t super_prototype = ecma_op_object_get_by_magic_id (super_class_p,
LIT_MAGIC_STRING_PROTOTYPE);
if (ECMA_IS_VALUE_ERROR (super_prototype))
{
result = super_prototype;
goto error;
}
*stack_top_p++ = super_prototype;
}
else
{
ecma_object_t *super_class_p = ecma_op_resolve_super_reference_value (frame_ctx_p->lex_env_p);
ecma_ref_object (super_class_p);
*stack_top_p++ = ecma_make_object_value (super_class_p);
}
continue;
}
case VM_OC_PUSH_CONSTRUCTOR_THIS:
{
if (!ecma_op_is_super_called (frame_ctx_p->lex_env_p))
{
result = ecma_raise_reference_error (ECMA_ERR_MSG ("Must call super constructor in derived class before "
"accessing 'this' or returning from it."));
goto error;
}
*stack_top_p++ = ecma_copy_value (ecma_op_get_class_this_binding (frame_ctx_p->lex_env_p));
continue;
}
case VM_OC_SUPER_PROP_REFERENCE:
{
/**
* In case of this VM_OC_SUPER_PROP_REFERENCE the previously pushed 'super' must be replaced
* with the current 'this' value to correctly access the properties.
*/
int index = -1; /* -1 in case of CBC_EXT_SUPER_PROP_ASSIGN */
if (JERRY_LIKELY (byte_code_start_p[1] == CBC_EXT_SUPER_PROP_CALL))
{
cbc_opcode_t next_call_opcode = (cbc_opcode_t) byte_code_start_p[2];
/* The next opcode must be a call opcode */
JERRY_ASSERT (CBC_CALL <= next_call_opcode && next_call_opcode <= CBC_CALL2_PROP_BLOCK);
int arguments_list_len;
if (next_call_opcode >= CBC_CALL0)
{
/* CBC_CALL{0,1,2}* have their arg count encoded, extract it from there */
arguments_list_len = (int) ((next_call_opcode - CBC_CALL0) / 6);
}
else
{
/**
* In this case the arguments are coded into the byte code stream as a byte argument
* following the call opcode.
*/
arguments_list_len = (int) byte_code_start_p[3];
}
/* The old 'super' value is at least '-3' element away from the current position on the stack. */
index = -3 - arguments_list_len;
}
else
{
/**
* The bytecode order for super assignment should be one of this:
* - CBC_EXT_PUSH_SUPER, CBC_EXT_SUPER_PROP_ASSIGN.
* - CBC_EXT_PUSH_CONSTRUCTOR_SUPER_PROP, CBC_EXT_SUPER_PROP_ASSIGN.
* That is one ext opcode back (-1).
*/
JERRY_ASSERT (byte_code_start_p[-1] == CBC_EXT_PUSH_SUPER
|| byte_code_start_p[-1] == CBC_EXT_PUSH_CONSTRUCTOR_SUPER_PROP);
}
/* Replace the old 'super' value with the correct 'this' binding */
ecma_free_value (stack_top_p[index]);
stack_top_p[index] = ecma_copy_value (frame_ctx_p->this_binding);
continue;
}
case VM_OC_CONSTRUCTOR_RET:
{
result = left_value;
left_value = ECMA_VALUE_UNDEFINED;
if (!ecma_is_value_object (result))
{
if (ecma_is_value_undefined (result))
{
if (!ecma_op_is_super_called (frame_ctx_p->lex_env_p))
{
result = ecma_raise_reference_error (ECMA_ERR_MSG ("Must call super constructor in derived class "
"before returning from derived constructor"));
}
}
else
{
ecma_free_value (result);
result = ecma_raise_type_error (ECMA_ERR_MSG ("Derived constructors may only "
"return object or undefined."));
}
}
goto error;
}
case VM_OC_PUSH_SPREAD_ELEMENT:
{
*stack_top_p++ = ECMA_VALUE_SPREAD_ELEMENT;
continue;
}
case VM_OC_GET_ITERATOR:
{
result = ecma_op_get_iterator (stack_top_p[-1], ECMA_VALUE_EMPTY);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
continue;
}
case VM_OC_ITERATOR_STEP:
{
const int8_t index = (opcode == CBC_EXT_ITERATOR_STEP) ? -1 : -3;
result = ecma_op_iterator_step (stack_top_p[index]);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
ecma_value_t value = ECMA_VALUE_UNDEFINED;
if (!ecma_is_value_false (result))
{
value = ecma_op_iterator_value (result);
ecma_free_value (result);
if (ECMA_IS_VALUE_ERROR (value))
{
result = value;
goto error;
}
}
*stack_top_p++ = value;
continue;
}
case VM_OC_DEFAULT_INITIALIZER:
{
JERRY_ASSERT (stack_top_p > frame_ctx_p->registers_p + register_end);
if (stack_top_p[-1] != ECMA_VALUE_UNDEFINED)
{
byte_code_p = byte_code_start_p + branch_offset;
continue;
}
stack_top_p--;
continue;
}
case VM_OC_REST_INITIALIZER:
{
const int8_t iterator_index = (opcode == CBC_EXT_REST_INITIALIZER) ? -1 : -3;
ecma_object_t *array_p = ecma_op_new_fast_array_object (0);
ecma_value_t iterator = stack_top_p[iterator_index];
uint32_t index = 0;
while (true)
{
result = ecma_op_iterator_step (iterator);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
if (ecma_is_value_false (result))
{
break;
}
ecma_value_t value = ecma_op_iterator_value (result);
ecma_free_value (result);
if (ECMA_IS_VALUE_ERROR (value))
{
result = value;
goto error;
}
bool set_result = ecma_fast_array_set_property (array_p, index++, value);
JERRY_ASSERT (set_result);
ecma_free_value (value);
}
*stack_top_p++ = ecma_make_object_value (array_p);
continue;
}
case VM_OC_INITIALIZER_PUSH_PROP:
{
result = vm_op_get_value (stack_top_p[-1], left_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_left_value;
}
case VM_OC_SPREAD_ARGUMENTS:
{
uint8_t arguments_list_len = *byte_code_p++;
ecma_collection_t *arguments_p = opfunc_spread_arguments (&stack_top_p, arguments_list_len);
if (JERRY_UNLIKELY (arguments_p == NULL))
{
result = ECMA_VALUE_ERROR;
goto error;
}
stack_top_p++;
ECMA_SET_INTERNAL_VALUE_POINTER (stack_top_p[-1], arguments_p);
frame_ctx_p->call_operation = VM_EXEC_SPREAD_OP;
frame_ctx_p->byte_code_p = byte_code_start_p;
frame_ctx_p->stack_top_p = stack_top_p;
return ECMA_VALUE_UNDEFINED;
}
#endif /* ENABLED (JERRY_ES2015) */
case VM_OC_PUSH_ELISON:
{
*stack_top_p++ = ECMA_VALUE_ARRAY_HOLE;
continue;
}
case VM_OC_APPEND_ARRAY:
{
uint16_t values_length = *byte_code_p++;
stack_top_p -= values_length;
#if ENABLED (JERRY_ES2015)
if (*byte_code_start_p == CBC_EXT_OPCODE)
{
values_length = (uint16_t) (values_length | OPFUNC_HAS_SPREAD_ELEMENT);
}
#endif /* ENABLED (JERRY_ES2015) */
result = opfunc_append_array (stack_top_p, values_length);
#if ENABLED (JERRY_ES2015)
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
#else /* !ENABLED (JERRY_ES2015) */
JERRY_ASSERT (ecma_is_value_empty (result));
#endif /* ENABLED (JERRY_ES2015) */
continue;
}
case VM_OC_IDENT_REFERENCE:
{
uint16_t literal_index;
READ_LITERAL_INDEX (literal_index);
JERRY_ASSERT (literal_index < ident_end);
if (literal_index < register_end)
{
*stack_top_p++ = ECMA_VALUE_REGISTER_REF;
*stack_top_p++ = literal_index;
*stack_top_p++ = ecma_fast_copy_value (frame_ctx_p->registers_p[literal_index]);
}
else
{
ecma_string_t *name_p = ecma_get_string_from_value (literal_start_p[literal_index]);
ecma_object_t *ref_base_lex_env_p;
result = ecma_op_get_value_lex_env_base (frame_ctx_p->lex_env_p,
&ref_base_lex_env_p,
name_p);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
ecma_ref_object (ref_base_lex_env_p);
ecma_ref_ecma_string (name_p);
*stack_top_p++ = ecma_make_object_value (ref_base_lex_env_p);
*stack_top_p++ = ecma_make_string_value (name_p);
*stack_top_p++ = result;
}
continue;
}
case VM_OC_PROP_GET:
{
result = vm_op_get_value (left_value, right_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_PROP_REFERENCE:
{
/* Forms with reference requires preserving the base and offset. */
if (opcode == CBC_PUSH_PROP_REFERENCE)
{
left_value = stack_top_p[-2];
right_value = stack_top_p[-1];
}
else if (opcode == CBC_PUSH_PROP_LITERAL_REFERENCE)
{
*stack_top_p++ = left_value;
right_value = left_value;
left_value = stack_top_p[-2];
}
else
{
JERRY_ASSERT (opcode == CBC_PUSH_PROP_LITERAL_LITERAL_REFERENCE
|| opcode == CBC_PUSH_PROP_THIS_LITERAL_REFERENCE);
*stack_top_p++ = left_value;
*stack_top_p++ = right_value;
}
/* FALLTHRU */
}
case VM_OC_PROP_PRE_INCR:
case VM_OC_PROP_PRE_DECR:
case VM_OC_PROP_POST_INCR:
case VM_OC_PROP_POST_DECR:
{
result = vm_op_get_value (left_value,
right_value);
if (opcode < CBC_PRE_INCR)
{
left_value = ECMA_VALUE_UNDEFINED;
right_value = ECMA_VALUE_UNDEFINED;
}
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
if (opcode < CBC_PRE_INCR)
{
break;
}
stack_top_p += 2;
left_value = result;
right_value = ECMA_VALUE_UNDEFINED;
/* FALLTHRU */
}
case VM_OC_PRE_INCR:
case VM_OC_PRE_DECR:
case VM_OC_POST_INCR:
case VM_OC_POST_DECR:
{
uint32_t opcode_flags = VM_OC_GROUP_GET_INDEX (opcode_data) - VM_OC_PROP_PRE_INCR;
byte_code_p = byte_code_start_p + 1;
if (ecma_is_value_integer_number (left_value))
{
result = left_value;
left_value = ECMA_VALUE_UNDEFINED;
ecma_integer_value_t int_value = (ecma_integer_value_t) result;
ecma_integer_value_t int_increase = 0;
if (opcode_flags & VM_OC_DECREMENT_OPERATOR_FLAG)
{
if (int_value > ECMA_INTEGER_NUMBER_MIN_SHIFTED)
{
int_increase = -(1 << ECMA_DIRECT_SHIFT);
}
}
else if (int_value < ECMA_INTEGER_NUMBER_MAX_SHIFTED)
{
int_increase = 1 << ECMA_DIRECT_SHIFT;
}
if (JERRY_LIKELY (int_increase != 0))
{
/* Postfix operators require the unmodifed number value. */
if (opcode_flags & VM_OC_POST_INCR_DECR_OPERATOR_FLAG)
{
if (opcode_data & VM_OC_PUT_STACK)
{
if (opcode_flags & VM_OC_IDENT_INCR_DECR_OPERATOR_FLAG)
{
JERRY_ASSERT (opcode == CBC_POST_INCR_IDENT_PUSH_RESULT
|| opcode == CBC_POST_DECR_IDENT_PUSH_RESULT);
*stack_top_p++ = result;
}
else
{
/* The parser ensures there is enough space for the
* extra value on the stack. See js-parser-expr.c. */
JERRY_ASSERT (opcode == CBC_POST_INCR_PUSH_RESULT
|| opcode == CBC_POST_DECR_PUSH_RESULT);
stack_top_p++;
stack_top_p[-1] = stack_top_p[-2];
stack_top_p[-2] = stack_top_p[-3];
stack_top_p[-3] = result;
}
opcode_data &= (uint32_t)~VM_OC_PUT_STACK;
}
else if (opcode_data & VM_OC_PUT_BLOCK)
{
ecma_free_value (frame_ctx_p->block_result);
frame_ctx_p->block_result = result;
opcode_data &= (uint32_t) ~VM_OC_PUT_BLOCK;
}
}
result = (ecma_value_t) (int_value + int_increase);
break;
}
}
else if (ecma_is_value_float_number (left_value))
{
result = left_value;
left_value = ECMA_VALUE_UNDEFINED;
}
else
{
result = ecma_op_to_number (left_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
}
ecma_number_t increase = ECMA_NUMBER_ONE;
ecma_number_t result_number = ecma_get_number_from_value (result);
if (opcode_flags & VM_OC_DECREMENT_OPERATOR_FLAG)
{
/* For decrement operators */
increase = ECMA_NUMBER_MINUS_ONE;
}
/* Post operators require the unmodifed number value. */
if (opcode_flags & VM_OC_POST_INCR_DECR_OPERATOR_FLAG)
{
if (opcode_data & VM_OC_PUT_STACK)
{
if (opcode_flags & VM_OC_IDENT_INCR_DECR_OPERATOR_FLAG)
{
JERRY_ASSERT (opcode == CBC_POST_INCR_IDENT_PUSH_RESULT
|| opcode == CBC_POST_DECR_IDENT_PUSH_RESULT);
*stack_top_p++ = ecma_copy_value (result);
}
else
{
/* The parser ensures there is enough space for the
* extra value on the stack. See js-parser-expr.c. */
JERRY_ASSERT (opcode == CBC_POST_INCR_PUSH_RESULT
|| opcode == CBC_POST_DECR_PUSH_RESULT);
stack_top_p++;
stack_top_p[-1] = stack_top_p[-2];
stack_top_p[-2] = stack_top_p[-3];
stack_top_p[-3] = ecma_copy_value (result);
}
opcode_data &= (uint32_t)~VM_OC_PUT_STACK;
}
else if (opcode_data & VM_OC_PUT_BLOCK)
{
ecma_free_value (frame_ctx_p->block_result);
frame_ctx_p->block_result = ecma_copy_value (result);
opcode_data &= (uint32_t) ~VM_OC_PUT_BLOCK;
}
}
if (ecma_is_value_integer_number (result))
{
result = ecma_make_number_value (result_number + increase);
}
else
{
result = ecma_update_float_number (result, result_number + increase);
}
break;
}
case VM_OC_ASSIGN:
{
result = left_value;
left_value = ECMA_VALUE_UNDEFINED;
break;
}
case VM_OC_MOV_IDENT:
{
uint32_t literal_index;
READ_LITERAL_INDEX (literal_index);
JERRY_ASSERT (literal_index < register_end);
JERRY_ASSERT (!(opcode_data & (VM_OC_PUT_STACK | VM_OC_PUT_BLOCK)));
ecma_fast_free_value (frame_ctx_p->registers_p[literal_index]);
frame_ctx_p->registers_p[literal_index] = left_value;
continue;
}
case VM_OC_ASSIGN_PROP:
{
result = stack_top_p[-1];
stack_top_p[-1] = left_value;
left_value = ECMA_VALUE_UNDEFINED;
break;
}
case VM_OC_ASSIGN_PROP_THIS:
{
result = stack_top_p[-1];
stack_top_p[-1] = ecma_copy_value (frame_ctx_p->this_binding);
*stack_top_p++ = left_value;
left_value = ECMA_VALUE_UNDEFINED;
break;
}
case VM_OC_RET:
{
JERRY_ASSERT (opcode == CBC_RETURN
|| opcode == CBC_RETURN_WITH_BLOCK
|| opcode == CBC_RETURN_WITH_LITERAL);
if (opcode == CBC_RETURN_WITH_BLOCK)
{
left_value = frame_ctx_p->block_result;
frame_ctx_p->block_result = ECMA_VALUE_UNDEFINED;
}
result = left_value;
left_value = ECMA_VALUE_UNDEFINED;
goto error;
}
case VM_OC_THROW:
{
JERRY_CONTEXT (error_value) = left_value;
JERRY_CONTEXT (status_flags) |= ECMA_STATUS_EXCEPTION;
result = ECMA_VALUE_ERROR;
left_value = ECMA_VALUE_UNDEFINED;
goto error;
}
case VM_OC_THROW_REFERENCE_ERROR:
{
result = ecma_raise_reference_error (ECMA_ERR_MSG ("Undefined reference."));
goto error;
}
case VM_OC_EVAL:
{
JERRY_CONTEXT (status_flags) |= ECMA_STATUS_DIRECT_EVAL;
JERRY_ASSERT (*byte_code_p >= CBC_CALL && *byte_code_p <= CBC_CALL2_PROP_BLOCK);
continue;
}
case VM_OC_CALL:
{
frame_ctx_p->call_operation = VM_EXEC_CALL;
frame_ctx_p->byte_code_p = byte_code_start_p;
frame_ctx_p->stack_top_p = stack_top_p;
return ECMA_VALUE_UNDEFINED;
}
case VM_OC_NEW:
{
frame_ctx_p->call_operation = VM_EXEC_CONSTRUCT;
frame_ctx_p->byte_code_p = byte_code_start_p;
frame_ctx_p->stack_top_p = stack_top_p;
return ECMA_VALUE_UNDEFINED;
}
case VM_OC_ERROR:
{
JERRY_ASSERT (frame_ctx_p->byte_code_p[1] == CBC_EXT_ERROR);
#if ENABLED (JERRY_DEBUGGER)
frame_ctx_p->byte_code_p = JERRY_CONTEXT (debugger_exception_byte_code_p);
#endif /* ENABLED (JERRY_DEBUGGER) */
result = ECMA_VALUE_ERROR;
goto error;
}
case VM_OC_RESOLVE_BASE_FOR_CALL:
{
ecma_value_t this_value = stack_top_p[-3];
if (this_value == ECMA_VALUE_REGISTER_REF)
{
/* Lexical environment cannot be 'this' value. */
stack_top_p[-2] = ECMA_VALUE_UNDEFINED;
stack_top_p[-3] = ECMA_VALUE_UNDEFINED;
}
else if (vm_get_implicit_this_value (&this_value))
{
ecma_free_value (stack_top_p[-3]);
stack_top_p[-3] = this_value;
}
continue;
}
case VM_OC_PROP_DELETE:
{
result = vm_op_delete_prop (left_value, right_value, is_strict);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
JERRY_ASSERT (ecma_is_value_boolean (result));
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_DELETE:
{
uint16_t literal_index;
READ_LITERAL_INDEX (literal_index);
if (literal_index < register_end)
{
*stack_top_p++ = ECMA_VALUE_FALSE;
continue;
}
result = vm_op_delete_var (literal_start_p[literal_index],
frame_ctx_p->lex_env_p);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
JERRY_ASSERT (ecma_is_value_boolean (result));
*stack_top_p++ = result;
continue;
}
case VM_OC_JUMP:
{
byte_code_p = byte_code_start_p + branch_offset;
continue;
}
case VM_OC_BRANCH_IF_STRICT_EQUAL:
{
ecma_value_t value = *(--stack_top_p);
JERRY_ASSERT (stack_top_p > frame_ctx_p->registers_p + register_end);
if (ecma_op_strict_equality_compare (value, stack_top_p[-1]))
{
byte_code_p = byte_code_start_p + branch_offset;
ecma_free_value (*--stack_top_p);
}
ecma_free_value (value);
continue;
}
case VM_OC_BRANCH_IF_TRUE:
case VM_OC_BRANCH_IF_FALSE:
case VM_OC_BRANCH_IF_LOGICAL_TRUE:
case VM_OC_BRANCH_IF_LOGICAL_FALSE:
{
uint32_t opcode_flags = VM_OC_GROUP_GET_INDEX (opcode_data) - VM_OC_BRANCH_IF_TRUE;
ecma_value_t value = *(--stack_top_p);
bool boolean_value = ecma_op_to_boolean (value);
if (opcode_flags & VM_OC_BRANCH_IF_FALSE_FLAG)
{
boolean_value = !boolean_value;
}
if (boolean_value)
{
byte_code_p = byte_code_start_p + branch_offset;
if (opcode_flags & VM_OC_LOGICAL_BRANCH_FLAG)
{
/* "Push" the value back to the stack. */
++stack_top_p;
continue;
}
}
ecma_fast_free_value (value);
continue;
}
case VM_OC_PLUS:
case VM_OC_MINUS:
{
result = opfunc_unary_operation (left_value, VM_OC_GROUP_GET_INDEX (opcode_data) == VM_OC_PLUS);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_left_value;
}
case VM_OC_NOT:
{
*stack_top_p++ = ecma_make_boolean_value (!ecma_op_to_boolean (left_value));
JERRY_ASSERT (ecma_is_value_boolean (stack_top_p[-1]));
goto free_left_value;
}
case VM_OC_BIT_NOT:
{
JERRY_STATIC_ASSERT (ECMA_DIRECT_TYPE_MASK == ((1 << ECMA_DIRECT_SHIFT) - 1),
direct_type_mask_must_fill_all_bits_before_the_value_starts);
if (ecma_is_value_integer_number (left_value))
{
*stack_top_p++ = (~left_value) & (ecma_value_t) (~ECMA_DIRECT_TYPE_MASK);
goto free_left_value;
}
result = do_number_bitwise_logic (NUMBER_BITWISE_NOT,
left_value,
left_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_left_value;
}
case VM_OC_VOID:
{
*stack_top_p++ = ECMA_VALUE_UNDEFINED;
goto free_left_value;
}
case VM_OC_TYPEOF_IDENT:
{
uint16_t literal_index;
READ_LITERAL_INDEX (literal_index);
JERRY_ASSERT (literal_index < ident_end);
if (literal_index < register_end)
{
left_value = ecma_copy_value (frame_ctx_p->registers_p[literal_index]);
}
else
{
ecma_string_t *name_p = ecma_get_string_from_value (literal_start_p[literal_index]);
ecma_object_t *ref_base_lex_env_p;
result = ecma_op_get_value_lex_env_base (frame_ctx_p->lex_env_p,
&ref_base_lex_env_p,
name_p);
if (ref_base_lex_env_p == NULL)
{
ecma_free_value (JERRY_CONTEXT (error_value));
result = ECMA_VALUE_UNDEFINED;
}
else if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
left_value = result;
}
/* FALLTHRU */
}
case VM_OC_TYPEOF:
{
result = opfunc_typeof (left_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_left_value;
}
case VM_OC_ADD:
{
if (ecma_are_values_integer_numbers (left_value, right_value))
{
ecma_integer_value_t left_integer = ecma_get_integer_from_value (left_value);
ecma_integer_value_t right_integer = ecma_get_integer_from_value (right_value);
*stack_top_p++ = ecma_make_int32_value ((int32_t) (left_integer + right_integer));
continue;
}
if (ecma_is_value_float_number (left_value)
&& ecma_is_value_number (right_value))
{
ecma_number_t new_value = (ecma_get_float_from_value (left_value) +
ecma_get_number_from_value (right_value));
*stack_top_p++ = ecma_update_float_number (left_value, new_value);
ecma_free_number (right_value);
continue;
}
if (ecma_is_value_float_number (right_value)
&& ecma_is_value_integer_number (left_value))
{
ecma_number_t new_value = ((ecma_number_t) ecma_get_integer_from_value (left_value) +
ecma_get_float_from_value (right_value));
*stack_top_p++ = ecma_update_float_number (right_value, new_value);
continue;
}
result = opfunc_addition (left_value, right_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_SUB:
{
JERRY_STATIC_ASSERT (ECMA_INTEGER_NUMBER_MAX * 2 <= INT32_MAX
&& ECMA_INTEGER_NUMBER_MIN * 2 >= INT32_MIN,
doubled_ecma_numbers_must_fit_into_int32_range);
JERRY_ASSERT (!ECMA_IS_VALUE_ERROR (left_value)
&& !ECMA_IS_VALUE_ERROR (right_value));
if (ecma_are_values_integer_numbers (left_value, right_value))
{
ecma_integer_value_t left_integer = ecma_get_integer_from_value (left_value);
ecma_integer_value_t right_integer = ecma_get_integer_from_value (right_value);
*stack_top_p++ = ecma_make_int32_value ((int32_t) (left_integer - right_integer));
continue;
}
if (ecma_is_value_float_number (left_value)
&& ecma_is_value_number (right_value))
{
ecma_number_t new_value = (ecma_get_float_from_value (left_value) -
ecma_get_number_from_value (right_value));
*stack_top_p++ = ecma_update_float_number (left_value, new_value);
ecma_free_number (right_value);
continue;
}
if (ecma_is_value_float_number (right_value)
&& ecma_is_value_integer_number (left_value))
{
ecma_number_t new_value = ((ecma_number_t) ecma_get_integer_from_value (left_value) -
ecma_get_float_from_value (right_value));
*stack_top_p++ = ecma_update_float_number (right_value, new_value);
continue;
}
result = do_number_arithmetic (NUMBER_ARITHMETIC_SUBTRACTION,
left_value,
right_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_MUL:
{
JERRY_ASSERT (!ECMA_IS_VALUE_ERROR (left_value)
&& !ECMA_IS_VALUE_ERROR (right_value));
JERRY_STATIC_ASSERT (ECMA_INTEGER_MULTIPLY_MAX * ECMA_INTEGER_MULTIPLY_MAX <= ECMA_INTEGER_NUMBER_MAX
&& -(ECMA_INTEGER_MULTIPLY_MAX * ECMA_INTEGER_MULTIPLY_MAX) >= ECMA_INTEGER_NUMBER_MIN,
square_of_integer_multiply_max_must_fit_into_integer_value_range);
if (ecma_are_values_integer_numbers (left_value, right_value))
{
ecma_integer_value_t left_integer = ecma_get_integer_from_value (left_value);
ecma_integer_value_t right_integer = ecma_get_integer_from_value (right_value);
if (-ECMA_INTEGER_MULTIPLY_MAX <= left_integer
&& left_integer <= ECMA_INTEGER_MULTIPLY_MAX
&& -ECMA_INTEGER_MULTIPLY_MAX <= right_integer
&& right_integer <= ECMA_INTEGER_MULTIPLY_MAX
&& left_value != 0
&& right_value != 0)
{
*stack_top_p++ = ecma_integer_multiply (left_integer, right_integer);
continue;
}
ecma_number_t multiply = (ecma_number_t) left_integer * (ecma_number_t) right_integer;
*stack_top_p++ = ecma_make_number_value (multiply);
continue;
}
if (ecma_is_value_float_number (left_value)
&& ecma_is_value_number (right_value))
{
ecma_number_t new_value = (ecma_get_float_from_value (left_value) *
ecma_get_number_from_value (right_value));
*stack_top_p++ = ecma_update_float_number (left_value, new_value);
ecma_free_number (right_value);
continue;
}
if (ecma_is_value_float_number (right_value)
&& ecma_is_value_integer_number (left_value))
{
ecma_number_t new_value = ((ecma_number_t) ecma_get_integer_from_value (left_value) *
ecma_get_float_from_value (right_value));
*stack_top_p++ = ecma_update_float_number (right_value, new_value);
continue;
}
result = do_number_arithmetic (NUMBER_ARITHMETIC_MULTIPLICATION,
left_value,
right_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_DIV:
{
JERRY_ASSERT (!ECMA_IS_VALUE_ERROR (left_value)
&& !ECMA_IS_VALUE_ERROR (right_value));
result = do_number_arithmetic (NUMBER_ARITHMETIC_DIVISION,
left_value,
right_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_MOD:
{
JERRY_ASSERT (!ECMA_IS_VALUE_ERROR (left_value)
&& !ECMA_IS_VALUE_ERROR (right_value));
if (ecma_are_values_integer_numbers (left_value, right_value))
{
ecma_integer_value_t left_integer = ecma_get_integer_from_value (left_value);
ecma_integer_value_t right_integer = ecma_get_integer_from_value (right_value);
if (right_integer != 0)
{
ecma_integer_value_t mod_result = left_integer % right_integer;
if (mod_result != 0 || left_integer >= 0)
{
*stack_top_p++ = ecma_make_integer_value (mod_result);
continue;
}
}
}
result = do_number_arithmetic (NUMBER_ARITHMETIC_REMAINDER,
left_value,
right_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_EQUAL:
{
result = opfunc_equality (left_value, right_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_NOT_EQUAL:
{
result = opfunc_equality (left_value, right_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = ecma_invert_boolean_value (result);
goto free_both_values;
}
case VM_OC_STRICT_EQUAL:
{
bool is_equal = ecma_op_strict_equality_compare (left_value, right_value);
result = ecma_make_boolean_value (is_equal);
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_STRICT_NOT_EQUAL:
{
bool is_equal = ecma_op_strict_equality_compare (left_value, right_value);
result = ecma_make_boolean_value (!is_equal);
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_BIT_OR:
{
JERRY_STATIC_ASSERT (ECMA_DIRECT_TYPE_MASK == ((1 << ECMA_DIRECT_SHIFT) - 1),
direct_type_mask_must_fill_all_bits_before_the_value_starts);
if (ecma_are_values_integer_numbers (left_value, right_value))
{
*stack_top_p++ = left_value | right_value;
continue;
}
result = do_number_bitwise_logic (NUMBER_BITWISE_LOGIC_OR,
left_value,
right_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_BIT_XOR:
{
JERRY_STATIC_ASSERT (ECMA_DIRECT_TYPE_MASK == ((1 << ECMA_DIRECT_SHIFT) - 1),
direct_type_mask_must_fill_all_bits_before_the_value_starts);
if (ecma_are_values_integer_numbers (left_value, right_value))
{
*stack_top_p++ = (left_value ^ right_value) & (ecma_value_t) (~ECMA_DIRECT_TYPE_MASK);
continue;
}
result = do_number_bitwise_logic (NUMBER_BITWISE_LOGIC_XOR,
left_value,
right_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_BIT_AND:
{
JERRY_STATIC_ASSERT (ECMA_DIRECT_TYPE_MASK == ((1 << ECMA_DIRECT_SHIFT) - 1),
direct_type_mask_must_fill_all_bits_before_the_value_starts);
if (ecma_are_values_integer_numbers (left_value, right_value))
{
*stack_top_p++ = left_value & right_value;
continue;
}
result = do_number_bitwise_logic (NUMBER_BITWISE_LOGIC_AND,
left_value,
right_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_LEFT_SHIFT:
{
JERRY_STATIC_ASSERT (ECMA_DIRECT_TYPE_MASK == ((1 << ECMA_DIRECT_SHIFT) - 1),
direct_type_mask_must_fill_all_bits_before_the_value_starts);
if (ecma_are_values_integer_numbers (left_value, right_value))
{
ecma_integer_value_t left_integer = ecma_get_integer_from_value (left_value);
ecma_integer_value_t right_integer = ecma_get_integer_from_value (right_value);
*stack_top_p++ = ecma_make_int32_value ((int32_t) (left_integer << (right_integer & 0x1f)));
continue;
}
result = do_number_bitwise_logic (NUMBER_BITWISE_SHIFT_LEFT,
left_value,
right_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_RIGHT_SHIFT:
{
JERRY_STATIC_ASSERT (ECMA_DIRECT_TYPE_MASK == ((1 << ECMA_DIRECT_SHIFT) - 1),
direct_type_mask_must_fill_all_bits_before_the_value_starts);
if (ecma_are_values_integer_numbers (left_value, right_value))
{
ecma_integer_value_t left_integer = ecma_get_integer_from_value (left_value);
ecma_integer_value_t right_integer = ecma_get_integer_from_value (right_value);
*stack_top_p++ = ecma_make_integer_value (left_integer >> (right_integer & 0x1f));
continue;
}
result = do_number_bitwise_logic (NUMBER_BITWISE_SHIFT_RIGHT,
left_value,
right_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_UNS_RIGHT_SHIFT:
{
JERRY_STATIC_ASSERT (ECMA_DIRECT_TYPE_MASK == ((1 << ECMA_DIRECT_SHIFT) - 1),
direct_type_mask_must_fill_all_bits_before_the_value_starts);
if (ecma_are_values_integer_numbers (left_value, right_value))
{
uint32_t left_uint32 = (uint32_t) ecma_get_integer_from_value (left_value);
ecma_integer_value_t right_integer = ecma_get_integer_from_value (right_value);
*stack_top_p++ = ecma_make_uint32_value (left_uint32 >> (right_integer & 0x1f));
continue;
}
result = do_number_bitwise_logic (NUMBER_BITWISE_SHIFT_URIGHT,
left_value,
right_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_LESS:
{
if (ecma_are_values_integer_numbers (left_value, right_value))
{
bool is_less = (ecma_integer_value_t) left_value < (ecma_integer_value_t) right_value;
#if !ENABLED (JERRY_VM_EXEC_STOP)
/* This is a lookahead to the next opcode to improve performance.
* If it is CBC_BRANCH_IF_TRUE_BACKWARD, execute it. */
if (*byte_code_p <= CBC_BRANCH_IF_TRUE_BACKWARD_3 && *byte_code_p >= CBC_BRANCH_IF_TRUE_BACKWARD)
{
byte_code_start_p = byte_code_p++;
branch_offset_length = CBC_BRANCH_OFFSET_LENGTH (*byte_code_start_p);
JERRY_ASSERT (branch_offset_length >= 1 && branch_offset_length <= 3);
if (is_less)
{
branch_offset = *(byte_code_p++);
if (JERRY_UNLIKELY (branch_offset_length != 1))
{
branch_offset <<= 8;
branch_offset |= *(byte_code_p++);
if (JERRY_UNLIKELY (branch_offset_length == 3))
{
branch_offset <<= 8;
branch_offset |= *(byte_code_p++);
}
}
/* Note: The opcode is a backward branch. */
byte_code_p = byte_code_start_p - branch_offset;
}
else
{
byte_code_p += branch_offset_length;
}
continue;
}
#endif /* !ENABLED (JERRY_VM_EXEC_STOP) */
*stack_top_p++ = ecma_make_boolean_value (is_less);
continue;
}
if (ecma_is_value_number (left_value) && ecma_is_value_number (right_value))
{
ecma_number_t left_number = ecma_get_number_from_value (left_value);
ecma_number_t right_number = ecma_get_number_from_value (right_value);
*stack_top_p++ = ecma_make_boolean_value (left_number < right_number);
goto free_both_values;
}
result = opfunc_relation (left_value, right_value, true, false);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_GREATER:
{
if (ecma_are_values_integer_numbers (left_value, right_value))
{
ecma_integer_value_t left_integer = (ecma_integer_value_t) left_value;
ecma_integer_value_t right_integer = (ecma_integer_value_t) right_value;
*stack_top_p++ = ecma_make_boolean_value (left_integer > right_integer);
continue;
}
if (ecma_is_value_number (left_value) && ecma_is_value_number (right_value))
{
ecma_number_t left_number = ecma_get_number_from_value (left_value);
ecma_number_t right_number = ecma_get_number_from_value (right_value);
*stack_top_p++ = ecma_make_boolean_value (left_number > right_number);
goto free_both_values;
}
result = opfunc_relation (left_value, right_value, false, false);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_LESS_EQUAL:
{
if (ecma_are_values_integer_numbers (left_value, right_value))
{
ecma_integer_value_t left_integer = (ecma_integer_value_t) left_value;
ecma_integer_value_t right_integer = (ecma_integer_value_t) right_value;
*stack_top_p++ = ecma_make_boolean_value (left_integer <= right_integer);
continue;
}
if (ecma_is_value_number (left_value) && ecma_is_value_number (right_value))
{
ecma_number_t left_number = ecma_get_number_from_value (left_value);
ecma_number_t right_number = ecma_get_number_from_value (right_value);
*stack_top_p++ = ecma_make_boolean_value (left_number <= right_number);
goto free_both_values;
}
result = opfunc_relation (left_value, right_value, false, true);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_GREATER_EQUAL:
{
if (ecma_are_values_integer_numbers (left_value, right_value))
{
ecma_integer_value_t left_integer = (ecma_integer_value_t) left_value;
ecma_integer_value_t right_integer = (ecma_integer_value_t) right_value;
*stack_top_p++ = ecma_make_boolean_value (left_integer >= right_integer);
continue;
}
if (ecma_is_value_number (left_value) && ecma_is_value_number (right_value))
{
ecma_number_t left_number = ecma_get_number_from_value (left_value);
ecma_number_t right_number = ecma_get_number_from_value (right_value);
*stack_top_p++ = ecma_make_boolean_value (left_number >= right_number);
goto free_both_values;
}
result = opfunc_relation (left_value, right_value, true, true);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_IN:
{
result = opfunc_in (left_value, right_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_INSTANCEOF:
{
result = opfunc_instanceof (left_value, right_value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
*stack_top_p++ = result;
goto free_both_values;
}
case VM_OC_BLOCK_CREATE_CONTEXT:
{
#if ENABLED (JERRY_ES2015)
ecma_value_t *stack_context_top_p = frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth;
JERRY_ASSERT (stack_context_top_p == stack_top_p || stack_context_top_p == stack_top_p - 1);
if (byte_code_start_p[0] != CBC_EXT_OPCODE)
{
branch_offset += (int32_t) (byte_code_start_p - frame_ctx_p->byte_code_start_p);
if (stack_context_top_p != stack_top_p)
{
/* Preserve the value of switch statement. */
stack_context_top_p[1] = stack_context_top_p[0];
}
stack_context_top_p[0] = VM_CREATE_CONTEXT_WITH_ENV (VM_CONTEXT_BLOCK, branch_offset);
VM_PLUS_EQUAL_U16 (frame_ctx_p->context_depth, PARSER_BLOCK_CONTEXT_STACK_ALLOCATION);
stack_top_p += PARSER_BLOCK_CONTEXT_STACK_ALLOCATION;
}
else
{
JERRY_ASSERT (byte_code_start_p[1] == CBC_EXT_TRY_CREATE_ENV);
JERRY_ASSERT (VM_GET_CONTEXT_TYPE (stack_context_top_p[-1]) == VM_CONTEXT_TRY
|| VM_GET_CONTEXT_TYPE (stack_context_top_p[-1]) == VM_CONTEXT_CATCH
|| VM_GET_CONTEXT_TYPE (stack_context_top_p[-1]) == VM_CONTEXT_FINALLY_JUMP
|| VM_GET_CONTEXT_TYPE (stack_context_top_p[-1]) == VM_CONTEXT_FINALLY_THROW
|| VM_GET_CONTEXT_TYPE (stack_context_top_p[-1]) == VM_CONTEXT_FINALLY_RETURN);
JERRY_ASSERT (!(stack_context_top_p[-1] & VM_CONTEXT_HAS_LEX_ENV));
stack_context_top_p[-1] |= VM_CONTEXT_HAS_LEX_ENV;
}
#else /* !ENABLED (JERRY_ES2015) */
JERRY_ASSERT (VM_GET_CONTEXT_TYPE (stack_top_p[-2]) == VM_CONTEXT_CATCH
&& !(stack_top_p[-2] & VM_CONTEXT_HAS_LEX_ENV));
stack_top_p[-2] |= VM_CONTEXT_HAS_LEX_ENV;
#endif /* ENABLED (JERRY_ES2015) */
frame_ctx_p->lex_env_p = ecma_create_decl_lex_env (frame_ctx_p->lex_env_p);
frame_ctx_p->lex_env_p->type_flags_refs |= (uint16_t) ECMA_OBJECT_FLAG_BLOCK;
frame_ctx_p->byte_code_p = byte_code_p;
vm_init_loop (frame_ctx_p);
byte_code_p = frame_ctx_p->byte_code_p;
continue;
}
case VM_OC_WITH:
{
ecma_value_t value = *(--stack_top_p);
ecma_object_t *object_p;
ecma_object_t *with_env_p;
branch_offset += (int32_t) (byte_code_start_p - frame_ctx_p->byte_code_start_p);
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
result = ecma_op_to_object (value);
ecma_free_value (value);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
object_p = ecma_get_object_from_value (result);
with_env_p = ecma_create_object_lex_env (frame_ctx_p->lex_env_p,
object_p,
ECMA_LEXICAL_ENVIRONMENT_THIS_OBJECT_BOUND);
ecma_deref_object (object_p);
VM_PLUS_EQUAL_U16 (frame_ctx_p->context_depth, PARSER_WITH_CONTEXT_STACK_ALLOCATION);
stack_top_p += PARSER_WITH_CONTEXT_STACK_ALLOCATION;
stack_top_p[-1] = VM_CREATE_CONTEXT_WITH_ENV (VM_CONTEXT_WITH, branch_offset);
with_env_p->type_flags_refs |= (uint16_t) ECMA_OBJECT_FLAG_BLOCK;
frame_ctx_p->lex_env_p = with_env_p;
continue;
}
case VM_OC_FOR_IN_CREATE_CONTEXT:
{
ecma_value_t value = *(--stack_top_p);
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
ecma_value_t expr_obj_value = ECMA_VALUE_UNDEFINED;
ecma_collection_t *prop_names_p = opfunc_for_in (value, &expr_obj_value);
ecma_free_value (value);
if (prop_names_p == NULL)
{
/* The collection is already released */
byte_code_p = byte_code_start_p + branch_offset;
continue;
}
branch_offset += (int32_t) (byte_code_start_p - frame_ctx_p->byte_code_start_p);
VM_PLUS_EQUAL_U16 (frame_ctx_p->context_depth, PARSER_FOR_IN_CONTEXT_STACK_ALLOCATION);
stack_top_p += PARSER_FOR_IN_CONTEXT_STACK_ALLOCATION;
stack_top_p[-1] = VM_CREATE_CONTEXT (VM_CONTEXT_FOR_IN, branch_offset);
ECMA_SET_INTERNAL_VALUE_ANY_POINTER (stack_top_p[-2], prop_names_p);
stack_top_p[-3] = 0;
stack_top_p[-4] = expr_obj_value;
#if ENABLED (JERRY_ES2015)
if (byte_code_p[0] == CBC_EXT_OPCODE && byte_code_p[1] == CBC_EXT_CLONE_CONTEXT)
{
/* No need to duplicate the first context. */
byte_code_p += 2;
}
#endif /* ENABLED (JERRY_ES2015) */
continue;
}
case VM_OC_FOR_IN_GET_NEXT:
{
ecma_value_t *context_top_p = frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth;
ecma_collection_t *collection_p;
collection_p = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_collection_t, context_top_p[-2]);
JERRY_ASSERT (VM_GET_CONTEXT_TYPE (context_top_p[-1]) == VM_CONTEXT_FOR_IN);
uint32_t index = context_top_p[-3];
ecma_value_t *buffer_p = collection_p->buffer_p;
*stack_top_p++ = buffer_p[index];
context_top_p[-3]++;
continue;
}
case VM_OC_FOR_IN_HAS_NEXT:
{
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
ecma_collection_t *collection_p;
collection_p = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_collection_t, stack_top_p[-2]);
JERRY_ASSERT (VM_GET_CONTEXT_TYPE (stack_top_p[-1]) == VM_CONTEXT_FOR_IN);
ecma_value_t *buffer_p = collection_p->buffer_p;
ecma_object_t *object_p = ecma_get_object_from_value (stack_top_p[-4]);
uint32_t index = stack_top_p[-3];
while (index < collection_p->item_count)
{
ecma_string_t *prop_name_p = ecma_get_prop_name_from_value (buffer_p[index]);
if (JERRY_LIKELY (ecma_op_object_has_property (object_p, prop_name_p)))
{
byte_code_p = byte_code_start_p + branch_offset;
break;
}
ecma_deref_ecma_string (prop_name_p);
index++;
}
if (index == collection_p->item_count)
{
ecma_deref_object (object_p);
ecma_collection_destroy (collection_p);
VM_MINUS_EQUAL_U16 (frame_ctx_p->context_depth, PARSER_FOR_IN_CONTEXT_STACK_ALLOCATION);
stack_top_p -= PARSER_FOR_IN_CONTEXT_STACK_ALLOCATION;
}
else
{
stack_top_p[-3] = index;
}
continue;
}
#if ENABLED (JERRY_ES2015)
case VM_OC_FOR_OF_CREATE_CONTEXT:
{
ecma_value_t value = *(--stack_top_p);
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
ecma_value_t iterator = ecma_op_get_iterator (value, ECMA_VALUE_EMPTY);
ecma_free_value (value);
if (ECMA_IS_VALUE_ERROR (iterator))
{
result = iterator;
goto error;
}
ecma_value_t iterator_step = ecma_op_iterator_step (iterator);
if (ECMA_IS_VALUE_ERROR (iterator_step))
{
ecma_free_value (iterator);
result = iterator_step;
goto error;
}
if (ecma_is_value_false (iterator_step))
{
ecma_free_value (iterator);
byte_code_p = byte_code_start_p + branch_offset;
continue;
}
branch_offset += (int32_t) (byte_code_start_p - frame_ctx_p->byte_code_start_p);
VM_PLUS_EQUAL_U16 (frame_ctx_p->context_depth, PARSER_FOR_OF_CONTEXT_STACK_ALLOCATION);
stack_top_p += PARSER_FOR_OF_CONTEXT_STACK_ALLOCATION;
stack_top_p[-1] = VM_CREATE_CONTEXT (VM_CONTEXT_FOR_OF, branch_offset);
stack_top_p[-2] = iterator_step;
stack_top_p[-3] = iterator;
if (byte_code_p[0] == CBC_EXT_OPCODE && byte_code_p[1] == CBC_EXT_CLONE_CONTEXT)
{
/* No need to duplicate the first context. */
byte_code_p += 2;
}
continue;
}
case VM_OC_FOR_OF_GET_NEXT:
{
ecma_value_t *context_top_p = frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth;
JERRY_ASSERT (VM_GET_CONTEXT_TYPE (context_top_p[-1]) == VM_CONTEXT_FOR_OF);
ecma_value_t next_value = ecma_op_iterator_value (context_top_p[-2]);
if (ECMA_IS_VALUE_ERROR (next_value))
{
result = next_value;
goto error;
}
*stack_top_p++ = next_value;
continue;
}
case VM_OC_FOR_OF_HAS_NEXT:
{
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
ecma_value_t iterator_step = ecma_op_iterator_step (stack_top_p[-3]);
if (ECMA_IS_VALUE_ERROR (iterator_step))
{
result = iterator_step;
goto error;
}
if (!ecma_is_value_false (iterator_step))
{
ecma_free_value (stack_top_p[-2]);
stack_top_p[-2] = iterator_step;
byte_code_p = byte_code_start_p + branch_offset;
continue;
}
ecma_free_value (stack_top_p[-2]);
ecma_free_value (stack_top_p[-3]);
VM_MINUS_EQUAL_U16 (frame_ctx_p->context_depth, PARSER_FOR_OF_CONTEXT_STACK_ALLOCATION);
stack_top_p -= PARSER_FOR_OF_CONTEXT_STACK_ALLOCATION;
continue;
}
#endif /* ENABLED (JERRY_ES2015) */
case VM_OC_TRY:
{
/* Try opcode simply creates the try context. */
branch_offset += (int32_t) (byte_code_start_p - frame_ctx_p->byte_code_start_p);
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
VM_PLUS_EQUAL_U16 (frame_ctx_p->context_depth, PARSER_TRY_CONTEXT_STACK_ALLOCATION);
stack_top_p += PARSER_TRY_CONTEXT_STACK_ALLOCATION;
stack_top_p[-1] = VM_CREATE_CONTEXT (VM_CONTEXT_TRY, branch_offset);
continue;
}
case VM_OC_CATCH:
{
/* Catches are ignored and turned to jumps. */
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
JERRY_ASSERT (VM_GET_CONTEXT_TYPE (stack_top_p[-1]) == VM_CONTEXT_TRY);
byte_code_p = byte_code_start_p + branch_offset;
continue;
}
case VM_OC_FINALLY:
{
branch_offset += (int32_t) (byte_code_start_p - frame_ctx_p->byte_code_start_p);
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
JERRY_ASSERT (VM_GET_CONTEXT_TYPE (stack_top_p[-1]) == VM_CONTEXT_TRY
|| VM_GET_CONTEXT_TYPE (stack_top_p[-1]) == VM_CONTEXT_CATCH);
if (stack_top_p[-1] & VM_CONTEXT_HAS_LEX_ENV)
{
ecma_object_t *lex_env_p = frame_ctx_p->lex_env_p;
JERRY_ASSERT (lex_env_p->u2.outer_reference_cp != JMEM_CP_NULL);
frame_ctx_p->lex_env_p = ECMA_GET_NON_NULL_POINTER (ecma_object_t, lex_env_p->u2.outer_reference_cp);
ecma_deref_object (lex_env_p);
stack_top_p[-1] &= (ecma_value_t) ~VM_CONTEXT_HAS_LEX_ENV;
}
stack_top_p[-1] = VM_CREATE_CONTEXT (VM_CONTEXT_FINALLY_JUMP, branch_offset);
stack_top_p[-2] = (ecma_value_t) branch_offset;
continue;
}
case VM_OC_CONTEXT_END:
{
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
ecma_value_t context_type = VM_GET_CONTEXT_TYPE (stack_top_p[-1]);
if (!VM_CONTEXT_IS_FINALLY (context_type))
{
stack_top_p = vm_stack_context_abort (frame_ctx_p, stack_top_p);
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
continue;
}
#if ENABLED (JERRY_ES2015)
if (stack_top_p[-1] & VM_CONTEXT_HAS_LEX_ENV)
{
ecma_object_t *lex_env_p = frame_ctx_p->lex_env_p;
JERRY_ASSERT (lex_env_p->u2.outer_reference_cp != JMEM_CP_NULL);
frame_ctx_p->lex_env_p = ECMA_GET_NON_NULL_POINTER (ecma_object_t, lex_env_p->u2.outer_reference_cp);
ecma_deref_object (lex_env_p);
}
#endif /* ENABLED (JERRY_ES2015) */
VM_MINUS_EQUAL_U16 (frame_ctx_p->context_depth,
PARSER_TRY_CONTEXT_STACK_ALLOCATION);
stack_top_p -= PARSER_TRY_CONTEXT_STACK_ALLOCATION;
if (context_type == VM_CONTEXT_FINALLY_RETURN)
{
result = *stack_top_p;
goto error;
}
if (context_type == VM_CONTEXT_FINALLY_THROW)
{
JERRY_CONTEXT (error_value) = *stack_top_p;
JERRY_CONTEXT (status_flags) |= ECMA_STATUS_EXCEPTION;
result = ECMA_VALUE_ERROR;
#if ENABLED (JERRY_DEBUGGER)
JERRY_DEBUGGER_SET_FLAGS (JERRY_DEBUGGER_VM_EXCEPTION_THROWN);
#endif /* ENABLED (JERRY_DEBUGGER) */
goto error;
}
JERRY_ASSERT (context_type == VM_CONTEXT_FINALLY_JUMP);
uint32_t jump_target = *stack_top_p;
if (vm_stack_find_finally (frame_ctx_p,
&stack_top_p,
VM_CONTEXT_FINALLY_JUMP,
jump_target))
{
JERRY_ASSERT (VM_GET_CONTEXT_TYPE (stack_top_p[-1]) == VM_CONTEXT_FINALLY_JUMP);
byte_code_p = frame_ctx_p->byte_code_p;
stack_top_p[-2] = jump_target;
}
else
{
byte_code_p = frame_ctx_p->byte_code_start_p + jump_target;
}
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
continue;
}
case VM_OC_JUMP_AND_EXIT_CONTEXT:
{
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
branch_offset += (int32_t) (byte_code_start_p - frame_ctx_p->byte_code_start_p);
if (vm_stack_find_finally (frame_ctx_p,
&stack_top_p,
VM_CONTEXT_FINALLY_JUMP,
(uint32_t) branch_offset))
{
JERRY_ASSERT (VM_GET_CONTEXT_TYPE (stack_top_p[-1]) == VM_CONTEXT_FINALLY_JUMP);
byte_code_p = frame_ctx_p->byte_code_p;
stack_top_p[-2] = (uint32_t) branch_offset;
}
else
{
byte_code_p = frame_ctx_p->byte_code_start_p + branch_offset;
}
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
continue;
}
#if ENABLED (JERRY_DEBUGGER)
case VM_OC_BREAKPOINT_ENABLED:
{
if (JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_VM_IGNORE)
{
continue;
}
JERRY_ASSERT (JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_CONNECTED);
JERRY_ASSERT (!(frame_ctx_p->bytecode_header_p->status_flags & CBC_CODE_FLAGS_DEBUGGER_IGNORE));
frame_ctx_p->byte_code_p = byte_code_start_p;
jerry_debugger_breakpoint_hit (JERRY_DEBUGGER_BREAKPOINT_HIT);
if (JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_VM_EXCEPTION_THROWN)
{
result = ECMA_VALUE_ERROR;
goto error;
}
continue;
}
case VM_OC_BREAKPOINT_DISABLED:
{
if (JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_VM_IGNORE)
{
continue;
}
JERRY_ASSERT (JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_CONNECTED);
JERRY_ASSERT (!(frame_ctx_p->bytecode_header_p->status_flags & CBC_CODE_FLAGS_DEBUGGER_IGNORE));
frame_ctx_p->byte_code_p = byte_code_start_p;
if ((JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_VM_STOP)
&& (JERRY_CONTEXT (debugger_stop_context) == NULL
|| JERRY_CONTEXT (debugger_stop_context) == JERRY_CONTEXT (vm_top_context_p)))
{
jerry_debugger_breakpoint_hit (JERRY_DEBUGGER_BREAKPOINT_HIT);
if (JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_VM_EXCEPTION_THROWN)
{
result = ECMA_VALUE_ERROR;
goto error;
}
continue;
}
if (JERRY_CONTEXT (debugger_message_delay) > 0)
{
JERRY_CONTEXT (debugger_message_delay)--;
continue;
}
JERRY_CONTEXT (debugger_message_delay) = JERRY_DEBUGGER_MESSAGE_FREQUENCY;
if (jerry_debugger_receive (NULL))
{
continue;
}
if ((JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_VM_STOP)
&& (JERRY_CONTEXT (debugger_stop_context) == NULL
|| JERRY_CONTEXT (debugger_stop_context) == JERRY_CONTEXT (vm_top_context_p)))
{
jerry_debugger_breakpoint_hit (JERRY_DEBUGGER_BREAKPOINT_HIT);
if (JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_VM_EXCEPTION_THROWN)
{
result = ECMA_VALUE_ERROR;
goto error;
}
}
continue;
}
#endif /* ENABLED (JERRY_DEBUGGER) */
#if ENABLED (JERRY_LINE_INFO) || ENABLED (JERRY_ES2015_MODULE_SYSTEM)
case VM_OC_RESOURCE_NAME:
{
frame_ctx_p->resource_name = ecma_op_resource_name (bytecode_header_p);
continue;
}
#endif /* ENABLED (JERRY_LINE_INFO) || ENABLED (JERRY_ES2015_MODULE_SYSTEM) */
#if ENABLED (JERRY_LINE_INFO)
case VM_OC_LINE:
{
uint32_t value = 0;
uint8_t byte;
do
{
byte = *byte_code_p++;
value = (value << 7) | (byte & CBC_LOWER_SEVEN_BIT_MASK);
}
while (byte & CBC_HIGHEST_BIT_MASK);
frame_ctx_p->current_line = value;
continue;
}
#endif /* ENABLED (JERRY_LINE_INFO) */
case VM_OC_NONE:
default:
{
JERRY_ASSERT (VM_OC_GROUP_GET_INDEX (opcode_data) == VM_OC_NONE);
jerry_fatal (ERR_DISABLED_BYTE_CODE);
}
}
JERRY_ASSERT (VM_OC_HAS_PUT_RESULT (opcode_data));
if (opcode_data & VM_OC_PUT_IDENT)
{
uint16_t literal_index;
READ_LITERAL_INDEX (literal_index);
if (literal_index < register_end)
{
ecma_fast_free_value (frame_ctx_p->registers_p[literal_index]);
frame_ctx_p->registers_p[literal_index] = result;
if (opcode_data & (VM_OC_PUT_STACK | VM_OC_PUT_BLOCK))
{
result = ecma_fast_copy_value (result);
}
}
else
{
ecma_string_t *var_name_str_p = ecma_get_string_from_value (literal_start_p[literal_index]);
ecma_value_t put_value_result = ecma_op_put_value_lex_env_base (frame_ctx_p->lex_env_p,
var_name_str_p,
is_strict,
result);
if (ECMA_IS_VALUE_ERROR (put_value_result))
{
ecma_free_value (result);
result = put_value_result;
goto error;
}
if (!(opcode_data & (VM_OC_PUT_STACK | VM_OC_PUT_BLOCK)))
{
ecma_fast_free_value (result);
}
}
}
else if (opcode_data & VM_OC_PUT_REFERENCE)
{
ecma_value_t property = *(--stack_top_p);
ecma_value_t object = *(--stack_top_p);
if (object == ECMA_VALUE_REGISTER_REF)
{
ecma_fast_free_value (frame_ctx_p->registers_p[property]);
frame_ctx_p->registers_p[property] = result;
if (!(opcode_data & (VM_OC_PUT_STACK | VM_OC_PUT_BLOCK)))
{
goto free_both_values;
}
result = ecma_fast_copy_value (result);
}
else
{
ecma_value_t set_value_result = vm_op_set_value (object,
property,
result,
is_strict);
if (ECMA_IS_VALUE_ERROR (set_value_result))
{
ecma_free_value (result);
result = set_value_result;
goto error;
}
if (!(opcode_data & (VM_OC_PUT_STACK | VM_OC_PUT_BLOCK)))
{
ecma_fast_free_value (result);
goto free_both_values;
}
}
}
if (opcode_data & VM_OC_PUT_STACK)
{
*stack_top_p++ = result;
}
else if (opcode_data & VM_OC_PUT_BLOCK)
{
ecma_fast_free_value (frame_ctx_p->block_result);
frame_ctx_p->block_result = result;
}
free_both_values:
ecma_fast_free_value (right_value);
free_left_value:
ecma_fast_free_value (left_value);
}
error:
ecma_fast_free_value (left_value);
ecma_fast_free_value (right_value);
if (ECMA_IS_VALUE_ERROR (result))
{
ecma_value_t *vm_stack_p = stack_top_p;
for (vm_stack_p = frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth;
vm_stack_p < stack_top_p;
vm_stack_p++)
{
if (*vm_stack_p == ECMA_VALUE_REGISTER_REF)
{
JERRY_ASSERT (vm_stack_p < stack_top_p);
vm_stack_p++;
}
else
{
ecma_free_value (*vm_stack_p);
}
}
stack_top_p = frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth;
#if ENABLED (JERRY_DEBUGGER)
const uint32_t dont_stop = (JERRY_DEBUGGER_VM_IGNORE_EXCEPTION
| JERRY_DEBUGGER_VM_IGNORE
| JERRY_DEBUGGER_VM_EXCEPTION_THROWN);
if ((JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_CONNECTED)
&& !(frame_ctx_p->bytecode_header_p->status_flags
& (CBC_CODE_FLAGS_DEBUGGER_IGNORE | CBC_CODE_FLAGS_STATIC_FUNCTION))
&& !(JERRY_CONTEXT (debugger_flags) & dont_stop))
{
/* Save the error to a local value, because the engine enters breakpoint mode after,
therefore an evaluation error, or user-created error throw would overwrite it. */
ecma_value_t current_error_value = JERRY_CONTEXT (error_value);
if (jerry_debugger_send_exception_string ())
{
jerry_debugger_breakpoint_hit (JERRY_DEBUGGER_EXCEPTION_HIT);
if (JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_VM_EXCEPTION_THROWN)
{
ecma_free_value (current_error_value);
}
else
{
JERRY_CONTEXT (error_value) = current_error_value;
}
JERRY_DEBUGGER_SET_FLAGS (JERRY_DEBUGGER_VM_EXCEPTION_THROWN);
}
}
#endif /* ENABLED (JERRY_DEBUGGER) */
}
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
if (frame_ctx_p->context_depth == 0)
{
/* In most cases there is no context. */
ecma_fast_free_value (frame_ctx_p->block_result);
frame_ctx_p->call_operation = VM_NO_EXEC_OP;
return result;
}
if (!ECMA_IS_VALUE_ERROR (result))
{
if (vm_stack_find_finally (frame_ctx_p,
&stack_top_p,
VM_CONTEXT_FINALLY_RETURN,
0))
{
JERRY_ASSERT (VM_GET_CONTEXT_TYPE (stack_top_p[-1]) == VM_CONTEXT_FINALLY_RETURN);
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
byte_code_p = frame_ctx_p->byte_code_p;
stack_top_p[-2] = result;
continue;
}
}
else if (JERRY_CONTEXT (status_flags) & ECMA_STATUS_EXCEPTION)
{
if (vm_stack_find_finally (frame_ctx_p,
&stack_top_p,
VM_CONTEXT_FINALLY_THROW,
0))
{
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
JERRY_ASSERT (!(stack_top_p[-1] & VM_CONTEXT_HAS_LEX_ENV));
#if ENABLED (JERRY_DEBUGGER)
JERRY_DEBUGGER_CLEAR_FLAGS (JERRY_DEBUGGER_VM_EXCEPTION_THROWN);
#endif /* ENABLED (JERRY_DEBUGGER) */
byte_code_p = frame_ctx_p->byte_code_p;
if (VM_GET_CONTEXT_TYPE (stack_top_p[-1]) == VM_CONTEXT_FINALLY_THROW)
{
stack_top_p[-2] = JERRY_CONTEXT (error_value);
continue;
}
JERRY_ASSERT (VM_GET_CONTEXT_TYPE (stack_top_p[-1]) == VM_CONTEXT_CATCH);
*stack_top_p++ = JERRY_CONTEXT (error_value);
continue;
}
}
else
{
do
{
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
stack_top_p = vm_stack_context_abort (frame_ctx_p, stack_top_p);
}
while (frame_ctx_p->context_depth > 0);
}
ecma_free_value (frame_ctx_p->block_result);
frame_ctx_p->call_operation = VM_NO_EXEC_OP;
return result;
}
} /* vm_loop */
#undef READ_LITERAL
#undef READ_LITERAL_INDEX
/**
* Execute code block.
*
* @return ecma value
*/
static ecma_value_t JERRY_ATTR_NOINLINE
vm_execute (vm_frame_ctx_t *frame_ctx_p, /**< frame context */
const ecma_value_t *arg_p, /**< arguments list */
ecma_length_t arg_list_len) /**< length of arguments list */
{
const ecma_compiled_code_t *bytecode_header_p = frame_ctx_p->bytecode_header_p;
ecma_value_t completion_value;
uint16_t argument_end;
uint16_t register_end;
if (bytecode_header_p->status_flags & CBC_CODE_FLAGS_UINT16_ARGUMENTS)
{
cbc_uint16_arguments_t *args_p = (cbc_uint16_arguments_t *) bytecode_header_p;
argument_end = args_p->argument_end;
register_end = args_p->register_end;
}
else
{
cbc_uint8_arguments_t *args_p = (cbc_uint8_arguments_t *) bytecode_header_p;
argument_end = args_p->argument_end;
register_end = args_p->register_end;
}
frame_ctx_p->stack_top_p = frame_ctx_p->registers_p + register_end;
#if ENABLED (JERRY_ES2015)
uint32_t function_call_argument_count = arg_list_len;
#endif /* ENABLED (JERRY_ES2015) */
if (arg_list_len > argument_end)
{
arg_list_len = argument_end;
}
for (uint32_t i = 0; i < arg_list_len; i++)
{
frame_ctx_p->registers_p[i] = ecma_fast_copy_value (arg_p[i]);
}
/* The arg_list_len contains the end of the copied arguments.
* Fill everything else with undefined. */
if (register_end > arg_list_len)
{
ecma_value_t *stack_p = frame_ctx_p->registers_p + arg_list_len;
for (uint32_t i = arg_list_len; i < register_end; i++)
{
*stack_p++ = ECMA_VALUE_UNDEFINED;
}
}
#if ENABLED (JERRY_ES2015)
if (bytecode_header_p->status_flags & CBC_CODE_FLAGS_REST_PARAMETER)
{
JERRY_ASSERT (function_call_argument_count >= arg_list_len);
ecma_value_t new_array = ecma_op_create_array_object (arg_p + arg_list_len,
function_call_argument_count - arg_list_len,
false);
JERRY_ASSERT (!ECMA_IS_VALUE_ERROR (new_array));
frame_ctx_p->registers_p[argument_end] = new_array;
arg_list_len++;
}
#endif /* ENABLED (JERRY_ES2015) */
JERRY_CONTEXT (status_flags) &= (uint32_t) ~ECMA_STATUS_DIRECT_EVAL;
vm_frame_ctx_t *prev_context_p = JERRY_CONTEXT (vm_top_context_p);
JERRY_CONTEXT (vm_top_context_p) = frame_ctx_p;
vm_init_loop (frame_ctx_p);
while (true)
{
completion_value = vm_loop (frame_ctx_p);
switch (frame_ctx_p->call_operation)
{
case VM_EXEC_CALL:
{
opfunc_call (frame_ctx_p);
break;
}
#if ENABLED (JERRY_ES2015)
case VM_EXEC_SUPER_CALL:
{
vm_super_call (frame_ctx_p);
break;
}
case VM_EXEC_SPREAD_OP:
{
vm_spread_operation (frame_ctx_p);
break;
}
#endif /* ENABLED (JERRY_ES2015) */
case VM_EXEC_CONSTRUCT:
{
opfunc_construct (frame_ctx_p);
break;
}
default:
{
JERRY_ASSERT (frame_ctx_p->call_operation == VM_NO_EXEC_OP);
/* Free arguments and registers */
for (uint32_t i = 0; i < register_end; i++)
{
ecma_fast_free_value (frame_ctx_p->registers_p[i]);
}
#if ENABLED (JERRY_DEBUGGER)
if (JERRY_CONTEXT (debugger_stop_context) == JERRY_CONTEXT (vm_top_context_p))
{
/* The engine will stop when the next breakpoint is reached. */
JERRY_ASSERT (JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_VM_STOP);
JERRY_CONTEXT (debugger_stop_context) = NULL;
}
#endif /* ENABLED (JERRY_DEBUGGER) */
JERRY_CONTEXT (vm_top_context_p) = prev_context_p;
return completion_value;
}
}
}
} /* vm_execute */
/**
* Run the code.
*
* @return ecma value
*/
ecma_value_t
vm_run (const ecma_compiled_code_t *bytecode_header_p, /**< byte-code data header */
ecma_value_t this_binding_value, /**< value of 'ThisBinding' */
ecma_object_t *lex_env_p, /**< lexical environment to use */
uint32_t parse_opts, /**< ecma_parse_opts_t option bits */
const ecma_value_t *arg_list_p, /**< arguments list */
ecma_length_t arg_list_len) /**< length of arguments list */
{
ecma_value_t *literal_p;
vm_frame_ctx_t frame_ctx;
uint32_t call_stack_size;
if (bytecode_header_p->status_flags & CBC_CODE_FLAGS_UINT16_ARGUMENTS)
{
cbc_uint16_arguments_t *args_p = (cbc_uint16_arguments_t *) bytecode_header_p;
call_stack_size = (uint32_t) (args_p->register_end + args_p->stack_limit);
literal_p = (ecma_value_t *) ((uint8_t *) bytecode_header_p + sizeof (cbc_uint16_arguments_t));
literal_p -= args_p->register_end;
frame_ctx.literal_start_p = literal_p;
literal_p += args_p->literal_end;
}
else
{
cbc_uint8_arguments_t *args_p = (cbc_uint8_arguments_t *) bytecode_header_p;
call_stack_size = (uint32_t) (args_p->register_end + args_p->stack_limit);
literal_p = (ecma_value_t *) ((uint8_t *) bytecode_header_p + sizeof (cbc_uint8_arguments_t));
literal_p -= args_p->register_end;
frame_ctx.literal_start_p = literal_p;
literal_p += args_p->literal_end;
}
frame_ctx.bytecode_header_p = bytecode_header_p;
frame_ctx.byte_code_p = (uint8_t *) literal_p;
frame_ctx.byte_code_start_p = (uint8_t *) literal_p;
frame_ctx.lex_env_p = lex_env_p;
#if defined (JERRY_DEBUGGER) || ENABLED (JERRY_LINE_INFO)
frame_ctx.prev_context_p = JERRY_CONTEXT (vm_top_context_p);
#endif /* defined (JERRY_DEBUGGER) || ENABLED (JERRY_LINE_INFO) */
frame_ctx.this_binding = this_binding_value;
frame_ctx.block_result = ECMA_VALUE_UNDEFINED;
#if ENABLED (JERRY_LINE_INFO) || ENABLED (JERRY_ES2015_MODULE_SYSTEM)
frame_ctx.resource_name = ECMA_VALUE_UNDEFINED;
#endif /* ENABLED (JERRY_LINE_INFO) || ENABLED (JERRY_ES2015_MODULE_SYSTEM) */
#if ENABLED (JERRY_LINE_INFO)
frame_ctx.current_line = 0;
#endif /* ENABLED (JERRY_LINE_INFO) */
frame_ctx.context_depth = 0;
frame_ctx.is_eval_code = parse_opts & ECMA_PARSE_DIRECT_EVAL;
/* Use JERRY_MAX() to avoid array declaration with size 0. */
JERRY_VLA (ecma_value_t, stack, JERRY_MAX (call_stack_size, 1));
frame_ctx.registers_p = stack;
#if ENABLED (JERRY_ES2015_MODULE_SYSTEM)
if (JERRY_CONTEXT (module_top_context_p) != NULL)
{
ecma_value_t ret_value = ecma_module_connect_imports ();
if (ecma_is_value_empty (ret_value))
{
ret_value = ecma_module_check_indirect_exports ();
}
ecma_module_cleanup ();
if (!ecma_is_value_empty (ret_value))
{
return ret_value;
}
JERRY_CONTEXT (module_top_context_p) = NULL;
}
#endif /* ENABLED (JERRY_ES2015_MODULE_SYSTEM) */
return vm_execute (&frame_ctx, arg_list_p, arg_list_len);
} /* vm_run */
/**
* @}
* @}
*/
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