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Fix string size calculation in builtin string repeat (#3116)

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Fixes #3105

JerryScript-DCO-1.0-Signed-off-by: Daniel Balla dballa@inf.u-szeged.hu
This commit is contained in:
Daniel Balla
2019-09-16 13:55:33 +03:00
committed by Dániel Bátyai
parent 436fcbb4b7
commit aa8832a985
2 changed files with 29 additions and 13 deletions
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jerry-core/ecma/builtin-objects/ecma-builtin-string-prototype.c
+13 -13
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@@ -1883,49 +1883,49 @@ ecma_builtin_string_prototype_object_trim (ecma_string_t *original_string_p) /**
*/
static ecma_value_t
ecma_builtin_string_prototype_object_repeat (ecma_string_t *original_string_p, /**< this argument */
ecma_value_t count) /**< times to repeat */
ecma_value_t repeat) /**< times to repeat */
{
ecma_string_t *ret_string_p;
/* 4 */
ecma_number_t length_number;
ecma_value_t length_value = ecma_get_number (count, &length_number);
ecma_number_t count_number;
ecma_value_t count_value = ecma_get_number (repeat, &count_number);
/* 5 */
if (ECMA_IS_VALUE_ERROR (length_value))
if (ECMA_IS_VALUE_ERROR (count_value))
{
return length_value;
return count_value;
}
int32_t length = ecma_number_to_int32 (length_number);
int32_t repeat_count = ecma_number_to_int32 (count_number);
bool isNan = ecma_number_is_nan (length_number);
bool isNan = ecma_number_is_nan (count_number);
/* 6, 7 */
if (length_number < 0 || (!isNan && ecma_number_is_infinity (length_number)))
if (count_number < 0 || (!isNan && ecma_number_is_infinity (count_number)))
{
return ecma_raise_range_error (ECMA_ERR_MSG ("Invalid count value"));
}
lit_utf8_size_t size = ecma_string_get_utf8_size (original_string_p);
lit_utf8_size_t size = ecma_string_get_size (original_string_p);
if (length == 0 || size == 0 || isNan)
if (repeat_count == 0 || size == 0 || isNan)
{
return ecma_make_magic_string_value (LIT_MAGIC_STRING__EMPTY);
}
if ((uint32_t) length >= (ECMA_STRING_SIZE_LIMIT / size))
if ((uint32_t) repeat_count >= (ECMA_STRING_SIZE_LIMIT / size))
{
return ecma_raise_range_error (ECMA_ERR_MSG ("Invalid string length"));
}
lit_utf8_size_t total_size = size * (lit_utf8_size_t) length;
lit_utf8_size_t total_size = size * (lit_utf8_size_t) repeat_count;
JMEM_DEFINE_LOCAL_ARRAY (str_buffer, total_size, lit_utf8_byte_t);
lit_utf8_byte_t *buffer_ptr = str_buffer;
for (int32_t n = 0; n < length; n++)
for (int32_t n = 0; n < repeat_count; n++)
{
buffer_ptr += ecma_string_copy_to_cesu8_buffer (original_string_p, buffer_ptr,
(lit_utf8_size_t) (size));