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Improve arguments object (#4145)

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- Enhancement: Arguments object properties are now lazy instantiated
 - Bugfix: Mapped arguments object instantiated properties cannot be lcached
 - Bugfix: Mapped arguments should be constructed even if 0 formal parameters or arguments are provided
 - Update: remove 'caller' property of unmapped arguments object

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
This commit is contained in:
Robert Fancsik
2020-09-28 15:57:58 +02:00
committed by GitHub
parent 32de38198a
commit 75385a6045
14 changed files with 943 additions and 591 deletions
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jerry-core/ecma/base/ecma-helpers.c
+17 -17
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@@ -1498,23 +1498,6 @@ ecma_bytecode_deref (ecma_compiled_code_t *bytecode_p) /**< byte code pointer */
((size_t) bytecode_p->size) << JMEM_ALIGNMENT_LOG);
} /* ecma_bytecode_deref */
#if ENABLED (JERRY_ESNEXT)
/**
* Get the tagged template collection of the compiled code
*
* @return pointer to the tagged template collection
*/
ecma_collection_t *
ecma_compiled_code_get_tagged_template_collection (const ecma_compiled_code_t *bytecode_header_p) /**< compiled code */
{
JERRY_ASSERT (bytecode_header_p != NULL);
JERRY_ASSERT (bytecode_header_p->status_flags & CBC_CODE_FLAGS_HAS_TAGGED_LITERALS);
ecma_value_t *base_p = ecma_compiled_code_resolve_function_name (bytecode_header_p);
return ECMA_GET_INTERNAL_VALUE_POINTER (ecma_collection_t, base_p[-1]);
} /* ecma_compiled_code_get_tagged_template_collection */
/**
* Get the number of formal parameters of the compiled code
*
@@ -1552,6 +1535,23 @@ ecma_compiled_code_resolve_arguments_start (const ecma_compiled_code_t *bytecode
return ((ecma_value_t *) byte_p) - ecma_compiled_code_get_formal_params (bytecode_header_p);
} /* ecma_compiled_code_resolve_arguments_start */
#if ENABLED (JERRY_ESNEXT)
/**
* Get the tagged template collection of the compiled code
*
* @return pointer to the tagged template collection
*/
ecma_collection_t *
ecma_compiled_code_get_tagged_template_collection (const ecma_compiled_code_t *bytecode_header_p) /**< compiled code */
{
JERRY_ASSERT (bytecode_header_p != NULL);
JERRY_ASSERT (bytecode_header_p->status_flags & CBC_CODE_FLAGS_HAS_TAGGED_LITERALS);
ecma_value_t *base_p = ecma_compiled_code_resolve_function_name (bytecode_header_p);
return ECMA_GET_INTERNAL_VALUE_POINTER (ecma_collection_t, base_p[-1]);
} /* ecma_compiled_code_get_tagged_template_collection */
/**
* Resolve the position of the function name of the compiled code
*