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Simplify string management.

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Allocate a single memory block for strings, rather than a separate string header
and string characters block. In the past strings were split into 8 byte chunks,
and large amount of legacy code is designed for that representation. However the
current allocator allows block allocation so we don't need those complicated
algorithms anymore. This patch is a cleanup rather than an optimization.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2016-07-06 03:47:48 -07:00
parent 41337dbd59
commit 97be8bfbc8
3 changed files with 295 additions and 384 deletions
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jerry-core/ecma/base/ecma-lcache.c
+5 -2
View File
@@ -179,6 +179,7 @@ ecma_lcache_lookup (ecma_object_t *object_p, /**< object */
ecma_lcache_hash_entry_t *entry_p = ecma_lcache_hash_table[ecma_lcache_row_idx (object_cp, prop_name_p)];
ecma_lcache_hash_entry_t *entry_end_p = entry_p + ECMA_LCACHE_HASH_ROW_LENGTH;
ecma_string_container_t prop_container = ECMA_STRING_GET_CONTAINER (prop_name_p);
while (entry_p < entry_end_p)
{
@@ -189,8 +190,10 @@ ecma_lcache_lookup (ecma_object_t *object_p, /**< object */
JERRY_ASSERT ((prop_name_p->hash & ECMA_LCACHE_HASH_MASK) == (entry_prop_name_p->hash & ECMA_LCACHE_HASH_MASK));
if (ECMA_STRING_GET_CONTAINER (prop_name_p) == ECMA_STRING_GET_CONTAINER (entry_prop_name_p)
&& prop_name_p->u.common_field == entry_prop_name_p->u.common_field)
if (prop_name_p == entry_prop_name_p
|| (prop_container != ECMA_STRING_CONTAINER_HEAP_UTF8_STRING
&& prop_container == ECMA_STRING_GET_CONTAINER (entry_prop_name_p)
&& prop_name_p->u.common_field == entry_prop_name_p->u.common_field))
{
ecma_property_t *prop_p = entry_p->prop_p;
JERRY_ASSERT (prop_p != NULL && ecma_is_property_lcached (prop_p));