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Implement direct strings. (#2196)

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Direct strings are a new type of direct ecma-values (no memory allocation
is needed for encoding them) in JerryScript. Currently magic strings,
external magic strings and uint values are encoded as direct strings.

The constant pool of JerryScript byte-code is changed to hold ecma-values
rather than cpointers to support direct strings.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2018-02-23 00:21:46 +01:00
committed by yichoi
parent fbf5c32747
commit 51e3c4455a
37 changed files with 1493 additions and 1148 deletions
Download Patch File Download Diff File Expand all files Collapse all files
jerry-core/ecma/base/ecma-helpers.c
+12 -13
View File
@@ -723,7 +723,7 @@ ecma_free_property (ecma_object_t *object_p, /**< object the property belongs to
{
case ECMA_PROPERTY_TYPE_NAMEDDATA:
{
if (ECMA_PROPERTY_GET_NAME_TYPE (*property_p) == ECMA_STRING_CONTAINER_MAGIC_STRING)
if (ECMA_PROPERTY_GET_NAME_TYPE (*property_p) == ECMA_DIRECT_STRING_MAGIC)
{
if (name_cp == LIT_INTERNAL_MAGIC_STRING_NATIVE_HANDLE
|| name_cp == LIT_INTERNAL_MAGIC_STRING_NATIVE_POINTER)
@@ -758,7 +758,7 @@ ecma_free_property (ecma_object_t *object_p, /**< object the property belongs to
ecma_lcache_invalidate (object_p, name_cp, property_p);
}
if (ECMA_PROPERTY_GET_NAME_TYPE (*property_p) == ECMA_PROPERTY_NAME_TYPE_STRING)
if (ECMA_PROPERTY_GET_NAME_TYPE (*property_p) == ECMA_DIRECT_STRING_PTR)
{
ecma_string_t *prop_name_p = ECMA_GET_NON_NULL_POINTER (ecma_string_t, name_cp);
ecma_deref_ecma_string (prop_name_p);
@@ -1475,34 +1475,33 @@ ecma_bytecode_deref (ecma_compiled_code_t *bytecode_p) /**< byte code pointer */
if (bytecode_p->status_flags & CBC_CODE_FLAGS_FUNCTION)
{
jmem_cpointer_t *literal_start_p = NULL;
ecma_value_t *literal_start_p = NULL;
uint32_t literal_end;
uint32_t const_literal_end;
if (bytecode_p->status_flags & CBC_CODE_FLAGS_UINT16_ARGUMENTS)
{
uint8_t *byte_p = (uint8_t *) bytecode_p;
literal_start_p = (jmem_cpointer_t *) (byte_p + sizeof (cbc_uint16_arguments_t));
cbc_uint16_arguments_t *args_p = (cbc_uint16_arguments_t *) bytecode_p;
literal_end = args_p->literal_end;
const_literal_end = args_p->const_literal_end;
literal_start_p = (ecma_value_t *) ((uint8_t *) bytecode_p + sizeof (cbc_uint16_arguments_t));
literal_start_p -= args_p->register_end;
}
else
{
uint8_t *byte_p = (uint8_t *) bytecode_p;
literal_start_p = (jmem_cpointer_t *) (byte_p + sizeof (cbc_uint8_arguments_t));
cbc_uint8_arguments_t *args_p = (cbc_uint8_arguments_t *) bytecode_p;
literal_end = args_p->literal_end;
const_literal_end = args_p->const_literal_end;
literal_start_p = (ecma_value_t *) ((uint8_t *) bytecode_p + sizeof (cbc_uint8_arguments_t));
literal_start_p -= args_p->register_end;
}
for (uint32_t i = const_literal_end; i < literal_end; i++)
{
jmem_cpointer_t bytecode_cpointer = literal_start_p[i];
ecma_compiled_code_t *bytecode_literal_p = ECMA_GET_NON_NULL_POINTER (ecma_compiled_code_t,
bytecode_cpointer);
ecma_compiled_code_t *bytecode_literal_p = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_compiled_code_t,
literal_start_p[i]);
/* Self references are ignored. */
if (bytecode_literal_p != bytecode_p)
@@ -1554,7 +1553,7 @@ ecma_bytecode_deref (ecma_compiled_code_t *bytecode_p) /**< byte code pointer */
#ifndef CONFIG_DISABLE_REGEXP_BUILTIN
re_compiled_code_t *re_bytecode_p = (re_compiled_code_t *) bytecode_p;
ecma_deref_ecma_string (ECMA_GET_NON_NULL_POINTER (ecma_string_t, re_bytecode_p->pattern_cp));
ecma_deref_ecma_string (ecma_get_string_from_value (re_bytecode_p->pattern));
#endif /* !CONFIG_DISABLE_REGEXP_BUILTIN */
}