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Add new check for a special corner case to typedarray lastIndexOf (#3156)

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Fixes #3129
We need to check if we use the lastIndexOf method  and if the second
argument is a number, negative, and its absolute value is bigger
than the length, then  we should return with -1.

JerryScript-DCO-1.0-Signed-off-by: Adam Szilagyi aszilagy@inf.u-szeged.hu
This commit is contained in:
Szilagyi Adam 2019-09-27 16:56:24 +02:00 committed by Dániel Bátyai
parent 0121b2bbcf
commit 711b06d018
2 changed files with 31 additions and 7 deletions
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21
jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.c
View File

@ -31,6 +31,7 @@
#include "ecma-gc.h"
#include "jmem.h"
#include "ecma-iterator-object.h"
#include "math.h"
#if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
@ -1719,7 +1720,8 @@ ecma_builtin_typedarray_prototype_index_helper (ecma_value_t this_arg, /**< this
uint32_t from_index;
if (args_number == 0
|| length == 0)
|| length == 0
|| !ecma_is_value_number (args[0]))
{
return ecma_make_integer_value (-1);
}
@ -1736,12 +1738,17 @@ ecma_builtin_typedarray_prototype_index_helper (ecma_value_t this_arg, /**< this
return ECMA_VALUE_ERROR;
}
from_index = ecma_builtin_helper_array_index_normalize (num_var, length, is_last_index_of);
}
if (!ecma_is_value_number (args[0]))
{
return ecma_make_integer_value (-1);
if (!ecma_number_is_nan (num_var)
&& is_last_index_of
&& num_var < 0
&& fabs (num_var) > length)
{
return ecma_make_integer_value (-1);
}
else
{
from_index = ecma_builtin_helper_array_index_normalize (num_var, length, is_last_index_of);
}
}
ecma_number_t search_num = ecma_get_number_from_value (args[0]);

17
tests/jerry/es2015/regression-test-issue-3129.js Normal file
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@ -0,0 +1,17 @@
// Copyright JS Foundation and other contributors, http://js.foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
var arrb = new ArrayBuffer(1);
var arr = new Uint8Array(arrb);
arr.lastIndexOf(Number.NaN, -[4294967280]);