// Copyright (C) 2019 Google. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-%typedarray%.prototype.copywithin
description: >
SECURITY: start argument is coerced to an integer value, which detached
the array
info: |
22.2.3.5 %TypedArray%.prototype.copyWithin ( target, start [ , end ] )
...
6. Let relativeStart be ? ToInteger(start).
...
10. Let count be min(final - from, len - to).
11. If count > 0, then
a. NOTE: The copying must be performed in a manner that preserves the bit-level encoding of the source data.
b. Let buffer be O.[[ViewedArrayBuffer]].
c. If IsDetachedBuffer(buffer) is true, throw a TypeError exception.
...
includes: [testTypedArray.js, detachArrayBuffer.js]
features: [TypedArray]
---*/
testWithTypedArrayConstructors(function(TA) {
var ta;
function detachAndReturnIndex(){
$DETACHBUFFER(ta.buffer);
return 100;
}
var array = [];
array.length = 10000; // big arrays are more likely to cause a crash if they are accessed after they are freed
array.fill(7, 0);
ta = new TA(array);
assert.throws(TypeError, function(){
ta.copyWithin(0, {valueOf : detachAndReturnIndex}, 1000);
}, "should throw TypeError as array is detached");
});