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Do not mark the unused items of a WeakMap (#4663)

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The new method is slower, but correctly release unused objects.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2021-04-27 09:42:03 +02:00
committed by GitHub
parent ce24edae24
commit 8aaabd8b01
5 changed files with 117 additions and 4 deletions
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jerry-core/ecma/base/ecma-gc.c
+44 -1
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@@ -327,6 +327,46 @@ ecma_gc_mark_properties (ecma_object_t *object_p, /**< object */
break;
}
#endif /* JERRY_ESNEXT */
#if JERRY_BUILTIN_WEAKMAP
case LIT_INTERNAL_MAGIC_STRING_WEAK_REFS:
{
ecma_value_t key_arg = ecma_make_object_value (object_p);
ecma_collection_t *refs_p;
refs_p = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_collection_t, property_pair_p->values[index].value);
for (uint32_t j = 0; j < refs_p->item_count; j++)
{
const ecma_value_t reference_value = refs_p->buffer_p[j];
if (ecma_is_value_empty (reference_value))
{
continue;
}
ecma_object_t *reference_object_p = ecma_get_object_from_value (reference_value);
JERRY_ASSERT (ecma_get_object_type (reference_object_p) == ECMA_OBJECT_TYPE_CLASS);
ecma_extended_object_t *map_object_p = (ecma_extended_object_t *) reference_object_p;
if (map_object_p->u.cls.type != ECMA_OBJECT_CLASS_CONTAINER
|| map_object_p->u.cls.u2.container_id != LIT_MAGIC_STRING_WEAKMAP_UL
|| !ecma_gc_is_object_visited (reference_object_p))
{
continue;
}
ecma_value_t value = ecma_op_container_find_weak_value (reference_object_p, key_arg);
if (ecma_is_value_object (value))
{
ecma_gc_set_object_visited (ecma_get_object_from_value (value));
}
}
break;
}
#endif /* JERRY_BUILTIN_WEAKMAP */
case LIT_INTERNAL_MAGIC_STRING_NATIVE_POINTER_WITH_REFERENCES:
{
jerry_value_t value = property_pair_p->values[index].value;
@@ -526,7 +566,10 @@ ecma_gc_mark_weakmap_object (ecma_object_t *object_p) /**< object */
continue;
}
if (ecma_is_value_object (entry_p->value))
JERRY_ASSERT (ecma_is_value_object (entry_p->key));
if (ecma_is_value_object (entry_p->value)
&& ecma_gc_is_object_visited (ecma_get_object_from_value (entry_p->key)))
{
ecma_gc_set_object_visited (ecma_get_object_from_value (entry_p->value));
}