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// Copyright 2021 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: --harmony-rab-gsab --allow-natives-syntax
"use strict";
class MyUint8Array extends Uint8Array {};
const ctors = [
Uint8Array,
Int8Array,
Uint16Array,
Int16Array,
Int32Array,
Float32Array,
Float64Array,
Uint8ClampedArray,
BigUint64Array,
BigInt64Array,
MyUint8Array
];
function CreateResizableArrayBuffer(byteLength, maxByteLength) {
return new ArrayBuffer(byteLength, {maxByteLength: maxByteLength});
}
(function ConstructorThrowsIfBufferDetached() {
const rab = CreateResizableArrayBuffer(40, 80);
%ArrayBufferDetach(rab);
for (let ctor of ctors) {
assertThrows(() => { ctor(rab); }, TypeError);
assertThrows(() => { ctor(rab, 8); }, TypeError);
assertThrows(() => { ctor(rab, 8, 1); }, TypeError);
}
})();
(function TypedArrayLengthAndByteLength() {
const rab = CreateResizableArrayBuffer(40, 80);
let tas = [];
for (let ctor of ctors) {
tas.push(new ctor(rab, 0, 3));
tas.push(new ctor(rab, 8, 3));
tas.push(new ctor(rab));
tas.push(new ctor(rab, 8));
}
%ArrayBufferDetach(rab);
for (let ta of tas) {
assertEquals(0, ta.length);
assertEquals(0, ta.byteLength);
}
})();
(function AccessDetachedTypedArray() {
const rab = CreateResizableArrayBuffer(16, 40);
const i8a = new Int8Array(rab, 0, 4);
// Initial values
for (let i = 0; i < 4; ++i) {
assertEquals(0, i8a[i]);
}
// Within-bounds write
for (let i = 0; i < 4; ++i) {
i8a[i] = i;
}
%ArrayBufferDetach(rab);
// OOB read
for (let i = 0; i < 4; ++i) {
assertEquals(undefined, i8a[i]);
}
// OOB write (has no effect)
for (let i = 0; i < 4; ++i) {
i8a[i] = 10;
}
for (let i = 0; i < 4; ++i) {
assertEquals(undefined, i8a[i]);
}
})();
(function LoadFromOutOfScopeTypedArrayWithFeedback() {
function ReadElement2(ta) {
return ta[2];
}
%EnsureFeedbackVectorForFunction(ReadElement2);
const rab = CreateResizableArrayBuffer(16, 40);
const i8a = new Int8Array(rab, 0, 4);
assertEquals(0, ReadElement2(i8a));
// Within-bounds write
for (let i = 0; i < 4; ++i) {
i8a[i] = i;
}
%ArrayBufferDetach(rab);
// OOB read
for (let i = 0; i < 3; ++i) {
assertEquals(undefined, ReadElement2(i8a));
}
})();
(function StoreToOutOfScopeTypedArrayWithFeedback() {
function WriteElement2(ta, i) {
ta[2] = i;
}
%EnsureFeedbackVectorForFunction(WriteElement2);
const rab = CreateResizableArrayBuffer(16, 40);
const i8a = new Int8Array(rab, 0, 4);
assertEquals(0, i8a[2]);
// Within-bounds write
for (let i = 0; i < 3; ++i) {
WriteElement2(i8a, 3);
}
%ArrayBufferDetach(rab);
// OOB write (has no effect)
for (let i = 0; i < 3; ++i) {
WriteElement2(i8a, 4);
}
// OOB read
for (let i = 0; i < 3; ++i) {
assertEquals(undefined, i8a[2]);
}
})();
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