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Issue 2778623003: [typedarrays] Check detached buffer at start of typed array methods (Closed)
Patch Set: pass test262 for subarray Created 3 years, 8 months ago
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1 // Copyright 2015 the V8 project authors. All rights reserved. 1 // Copyright 2015 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 // First test case 5 // First test case
6 6
7 function FirstBuffer () {} 7 function FirstBuffer () {}
8 FirstBuffer.prototype.__proto__ = Uint8Array.prototype 8 FirstBuffer.prototype.__proto__ = Uint8Array.prototype
9 FirstBuffer.__proto__ = Uint8Array 9 FirstBuffer.__proto__ = Uint8Array
10 10
11 var buf = new Uint8Array(10) 11 var buf = new Uint8Array(10)
12 buf.__proto__ = FirstBuffer.prototype 12 buf.__proto__ = FirstBuffer.prototype
13 13
14 var buf2 = buf.subarray(2) 14 assertThrows(() => buf.subarray(2), TypeError);
15 assertEquals(8, buf2.length);
16 15
17 // Second test case 16 // Second test case
18 17
18 let seen_args = [];
19
19 function SecondBuffer (arg) { 20 function SecondBuffer (arg) {
21 seen_args.push(arg);
20 var arr = new Uint8Array(arg) 22 var arr = new Uint8Array(arg)
21 arr.__proto__ = SecondBuffer.prototype 23 arr.__proto__ = SecondBuffer.prototype
22 return arr 24 return arr
23 } 25 }
24 SecondBuffer.prototype.__proto__ = Uint8Array.prototype 26 SecondBuffer.prototype.__proto__ = Uint8Array.prototype
25 SecondBuffer.__proto__ = Uint8Array 27 SecondBuffer.__proto__ = Uint8Array
26 28
27 var buf3 = new SecondBuffer(10) 29 var buf3 = new SecondBuffer(10)
30 assertEquals([10], seen_args);
28 31
29 var buf4 = buf3.subarray(2) 32 var buf4 = buf3.subarray(2)
30 33
31 assertEquals(8, buf4.length); 34 assertEquals(10, buf4.length);
35 assertEquals([10, buf3.buffer], seen_args);
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