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Diffstat (limited to 'deps/v8/test/mjsunit/es6/array-iterator-detached.js')
-rw-r--r-- | deps/v8/test/mjsunit/es6/array-iterator-detached.js | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/deps/v8/test/mjsunit/es6/array-iterator-detached.js b/deps/v8/test/mjsunit/es6/array-iterator-detached.js new file mode 100644 index 0000000000..e9a940191b --- /dev/null +++ b/deps/v8/test/mjsunit/es6/array-iterator-detached.js @@ -0,0 +1,47 @@ +// Copyright 2017 the V8 project authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +// Flags: --allow-natives-syntax + +function Baseline() { + let array = new Uint8Array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]); + + let it = array[Symbol.iterator](); + assertEquals(0, it.next().value); + assertEquals(1, it.next().value); + assertEquals(2, it.next().value); + %ArrayBufferNeuter(array.buffer); + it.next(); +}; +%NeverOptimizeFunction(Baseline); + +assertThrows(Baseline, TypeError, + "Cannot perform Array Iterator.prototype.next on a detached ArrayBuffer"); + +function Turbo(count = 10000) { + let array = Array(10000); + for (let i = 0; i < 10000; ++i) { + array[i] = 254; + } + array[5000] = 255; + array = new Uint8Array(array); + + let sum = 0; + let it = array[Symbol.iterator](); + for (let i = 0; i < count; ++i) { + let result = it.next(); + if (result.value === 255) { + %ArrayBufferNeuter(array.buffer); + } + sum += result.value; + } + return sum; +} + +Turbo(10); +Turbo(10); +%OptimizeFunctionOnNextCall(Turbo); + +assertThrows(Turbo, TypeError, + "Cannot perform Array Iterator.prototype.next on a detached ArrayBuffer"); |