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Add SharedArrayBuffer support (#4689)

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JerryScript-DCO-1.0-Signed-off-by: Gergo Csizi csgergo92@gmail.com
This commit is contained in:
Gergo Csizi
2021-07-23 17:29:06 +02:00
committed by GitHub
parent bbf1c0105b
commit d9360f51d0
28 changed files with 1050 additions and 337 deletions
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jerry-core/ecma/operations/ecma-arraybuffer-object.c
+144 -3
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@@ -13,7 +13,9 @@
* limitations under the License.
*/
#include "ecma-builtin-helpers.h"
#include "ecma-arraybuffer-object.h"
#include "ecma-shared-arraybuffer-object.h"
#include "ecma-typedarray-object.h"
#include "ecma-objects.h"
#include "ecma-builtins.h"
@@ -184,7 +186,8 @@ ecma_is_arraybuffer (ecma_value_t target) /**< the target value */
uint32_t JERRY_ATTR_PURE
ecma_arraybuffer_get_length (ecma_object_t *object_p) /**< pointer to the ArrayBuffer object */
{
JERRY_ASSERT (ecma_object_class_is (object_p, ECMA_OBJECT_CLASS_ARRAY_BUFFER));
JERRY_ASSERT (ecma_object_class_is (object_p, ECMA_OBJECT_CLASS_ARRAY_BUFFER)
|| ecma_object_class_is (object_p, ECMA_OBJECT_CLASS_SHARED_ARRAY_BUFFER));
ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) object_p;
return ecma_arraybuffer_is_detached (object_p) ? 0 : ext_object_p->u.cls.u3.length;
@@ -198,7 +201,8 @@ ecma_arraybuffer_get_length (ecma_object_t *object_p) /**< pointer to the ArrayB
extern inline lit_utf8_byte_t * JERRY_ATTR_PURE JERRY_ATTR_ALWAYS_INLINE
ecma_arraybuffer_get_buffer (ecma_object_t *object_p) /**< pointer to the ArrayBuffer object */
{
JERRY_ASSERT (ecma_object_class_is (object_p, ECMA_OBJECT_CLASS_ARRAY_BUFFER));
JERRY_ASSERT (ecma_object_class_is (object_p, ECMA_OBJECT_CLASS_ARRAY_BUFFER)
|| ecma_object_class_is (object_p, ECMA_OBJECT_CLASS_SHARED_ARRAY_BUFFER));
ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) object_p;
@@ -225,7 +229,8 @@ ecma_arraybuffer_get_buffer (ecma_object_t *object_p) /**< pointer to the ArrayB
extern inline bool JERRY_ATTR_PURE JERRY_ATTR_ALWAYS_INLINE
ecma_arraybuffer_is_detached (ecma_object_t *object_p) /**< pointer to the ArrayBuffer object */
{
JERRY_ASSERT (ecma_object_class_is (object_p, ECMA_OBJECT_CLASS_ARRAY_BUFFER));
JERRY_ASSERT (ecma_object_class_is (object_p, ECMA_OBJECT_CLASS_ARRAY_BUFFER)
|| ecma_object_class_is (object_p, ECMA_OBJECT_CLASS_SHARED_ARRAY_BUFFER));
return (((ecma_extended_object_t *) object_p)->u.cls.u1.array_buffer_flags & ECMA_ARRAYBUFFER_DETACHED) != 0;
} /* ecma_arraybuffer_is_detached */
@@ -268,6 +273,142 @@ ecma_arraybuffer_detach (ecma_object_t *object_p) /**< pointer to the ArrayBuffe
return true;
} /* ecma_arraybuffer_detach */
ecma_value_t
ecma_builtin_arraybuffer_slice (ecma_value_t this_arg,
const ecma_value_t *argument_list_p,
uint32_t arguments_number)
{
ecma_object_t *object_p = ecma_get_object_from_value (this_arg);
/* 4. */
if (ecma_arraybuffer_is_detached (object_p))
{
return ecma_raise_type_error (ECMA_ERR_MSG (ecma_error_arraybuffer_is_detached));
}
/* 5. */
uint32_t len = ecma_arraybuffer_get_length (object_p);
uint32_t start = 0;
uint32_t end = len;
if (arguments_number > 0)
{
/* 6-7. */
if (ECMA_IS_VALUE_ERROR (ecma_builtin_helper_uint32_index_normalize (argument_list_p[0],
len,
&start)))
{
return ECMA_VALUE_ERROR;
}
if (arguments_number > 1 && !ecma_is_value_undefined (argument_list_p[1]))
{
/* 8-9. */
if (ECMA_IS_VALUE_ERROR (ecma_builtin_helper_uint32_index_normalize (argument_list_p[1],
len,
&end)))
{
return ECMA_VALUE_ERROR;
}
}
}
/* 10. */
uint32_t new_len = (end >= start) ? (end - start) : 0;
/* 11. */
ecma_value_t ctor;
if (ecma_is_shared_arraybuffer (this_arg))
{
ctor = ecma_op_species_constructor (object_p, ECMA_BUILTIN_ID_SHARED_ARRAYBUFFER);
}
else
{
ctor = ecma_op_species_constructor (object_p, ECMA_BUILTIN_ID_ARRAYBUFFER);
}
if (ECMA_IS_VALUE_ERROR (ctor))
{
return ctor;
}
/* 12. */
ecma_object_t *ctor_obj_p = ecma_get_object_from_value (ctor);
ecma_value_t new_len_value = ecma_make_uint32_value (new_len);
ecma_value_t new_arraybuffer = ecma_op_function_construct (ctor_obj_p, ctor_obj_p, &new_len_value, 1);
ecma_deref_object (ctor_obj_p);
ecma_free_value (new_len_value);
if (ECMA_IS_VALUE_ERROR (new_arraybuffer))
{
return new_arraybuffer;
}
ecma_object_t *new_arraybuffer_p = ecma_get_object_from_value (new_arraybuffer);
ecma_value_t ret_value = ECMA_VALUE_EMPTY;
/* 13. */
if (!(ecma_object_class_is (new_arraybuffer_p, ECMA_OBJECT_CLASS_ARRAY_BUFFER)
|| ecma_object_class_is (new_arraybuffer_p, ECMA_OBJECT_CLASS_SHARED_ARRAY_BUFFER)))
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Return value is not an ArrayBuffer object"));
goto free_new_arraybuffer;
}
/* 14-15. */
if (ecma_arraybuffer_is_detached (new_arraybuffer_p))
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Returned ArrayBuffer has been detached"));
goto free_new_arraybuffer;
}
/* 16. */
if (new_arraybuffer == this_arg)
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("ArrayBuffer subclass returned this from species constructor"));
goto free_new_arraybuffer;
}
/* 17. */
if (ecma_arraybuffer_get_length (new_arraybuffer_p) < new_len)
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Derived ArrayBuffer constructor created a too small buffer"));
goto free_new_arraybuffer;
}
/* 19. */
if (ecma_arraybuffer_is_detached (object_p))
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Original ArrayBuffer has been detached"));
goto free_new_arraybuffer;
}
/* 20. */
lit_utf8_byte_t *old_buf = ecma_arraybuffer_get_buffer (object_p);
/* 21. */
lit_utf8_byte_t *new_buf = ecma_arraybuffer_get_buffer (new_arraybuffer_p);
/* 22. */
memcpy (new_buf, old_buf + start, new_len);
free_new_arraybuffer:
if (ret_value != ECMA_VALUE_EMPTY)
{
ecma_deref_object (new_arraybuffer_p);
}
else
{
/* 23. */
ret_value = ecma_make_object_value (new_arraybuffer_p);
}
return ret_value;
} /* ecma_builtin_arraybuffer_slice */
/**
* @}
* @}