1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
const byteLengths = [
// Byte lengths applicable for inline storage
0, 1, 4, 16, 32, 64, 96,
// Too large for inline storage
128, 1024, 4096, 65536,
];
// Most values in |byteLengths| are powers-of-two. Add +1/-1 to test for
// off-by-one errors.
function offByOne(v) {
if (v === 0) {
return [v, v + 1];
}
return [v - 1, v, v + 1];
}
// Fast alternative to |assertEq| to avoid a slow VM-call.
// Should only be used when looping over the TypedArray contents to avoid
// unnecessary test slowdowns.
function assertEqNum(e, a) {
if (e !== a) {
assertEq(e, a);
}
}
// Inline or malloced ArrayBuffer.
{
for (let byteLength of byteLengths.flatMap(offByOne)) {
for (let newByteLength of offByOne(byteLength)) {
for (let transfer of [
ArrayBuffer.prototype.transfer,
ArrayBuffer.prototype.transferToFixedLength,
]) {
let buffer = new ArrayBuffer(byteLength);
let i8 = new Uint8Array(buffer);
for (let i = 0; i < byteLength; ++i) {
assertEqNum(i8[i], 0);
i8[i] = i;
}
assertEq(buffer.byteLength, byteLength);
assertEq(buffer.detached, false);
let copy = transfer.call(buffer, newByteLength);
assertEq(buffer.byteLength, 0);
assertEq(buffer.detached, true);
assertEq(copy.byteLength, newByteLength);
assertEq(copy.detached, false);
i8 = new Uint8Array(copy);
for (let i = 0; i < Math.min(byteLength, newByteLength); ++i) {
assertEqNum(i8[i], i & 0xff);
}
for (let i = byteLength; i < newByteLength; ++i) {
assertEqNum(i8[i], 0);
}
}
}
}
}
// External buffer.
{
for (let byteLength of byteLengths.flatMap(offByOne)) {
for (let newByteLength of offByOne(byteLength)) {
for (let transfer of [
ArrayBuffer.prototype.transfer,
ArrayBuffer.prototype.transferToFixedLength,
]) {
let buffer = createExternalArrayBuffer(byteLength);
let i8 = new Uint8Array(buffer);
for (let i = 0; i < byteLength; ++i) {
assertEqNum(i8[i], 0);
i8[i] = i;
}
assertEq(buffer.byteLength, byteLength);
assertEq(buffer.detached, false);
let copy = transfer.call(buffer, newByteLength);
assertEq(buffer.byteLength, 0);
assertEq(buffer.detached, true);
assertEq(copy.byteLength, newByteLength);
assertEq(copy.detached, false);
i8 = new Uint8Array(copy);
for (let i = 0; i < Math.min(byteLength, newByteLength); ++i) {
assertEqNum(i8[i], i & 0xff);
}
for (let i = byteLength; i < newByteLength; ++i) {
assertEqNum(i8[i], 0);
}
}
}
}
}
// User-controlled buffer.
{
for (let byteLength of byteLengths.flatMap(offByOne)) {
for (let newByteLength of offByOne(byteLength)) {
for (let transfer of [
ArrayBuffer.prototype.transfer,
ArrayBuffer.prototype.transferToFixedLength,
]) {
let buffer = createUserArrayBuffer(byteLength);
let i8 = new Uint8Array(buffer);
for (let i = 0; i < byteLength; ++i) {
assertEqNum(i8[i], 0);
i8[i] = i;
}
assertEq(buffer.byteLength, byteLength);
assertEq(buffer.detached, false);
let copy = transfer.call(buffer, newByteLength);
assertEq(buffer.byteLength, 0);
assertEq(buffer.detached, true);
assertEq(copy.byteLength, newByteLength);
assertEq(copy.detached, false);
i8 = new Uint8Array(copy);
for (let i = 0; i < Math.min(byteLength, newByteLength); ++i) {
assertEqNum(i8[i], i & 0xff);
}
for (let i = byteLength; i < newByteLength; ++i) {
assertEqNum(i8[i], 0);
}
}
}
}
}
// Mapped file buffer.
if (getBuildConfiguration("mapped-array-buffer")) {
let fileName = "arraybuffer-transfer-mapped.txt";
let fileContent = os.file.readRelativeToScript(fileName, "binary");
let byteLength = fileContent.byteLength;
assertEq(byteLength > 0, true);
for (let newByteLength of offByOne(byteLength)) {
for (let transfer of [
ArrayBuffer.prototype.transfer,
ArrayBuffer.prototype.transferToFixedLength,
]) {
let buffer = createMappedArrayBuffer(fileName);
assertEq(buffer.byteLength, byteLength);
assertEq(buffer.detached, false);
let copy = transfer.call(buffer, newByteLength);
assertEq(buffer.byteLength, 0);
assertEq(buffer.detached, true);
assertEq(copy.byteLength, newByteLength);
assertEq(copy.detached, false);
i8 = new Uint8Array(copy);
for (let i = 0; i < Math.min(byteLength, newByteLength); ++i) {
assertEqNum(i8[i], fileContent[i]);
}
for (let i = byteLength; i < newByteLength; ++i) {
assertEqNum(i8[i], 0);
}
}
}
}
// Cross-compartment
{
let g = newGlobal({ newCompartment: true });
let byteLengthGetter = Object.getOwnPropertyDescriptor(ArrayBuffer.prototype, "byteLength").get;
let detachedGetter = Object.getOwnPropertyDescriptor(ArrayBuffer.prototype, "detached").get;
for (let byteLength of byteLengths) {
for (let transfer of [
ArrayBuffer.prototype.transfer,
ArrayBuffer.prototype.transferToFixedLength,
]) {
let buffer = new g.ArrayBuffer(byteLength);
assertEq(byteLengthGetter.call(buffer), byteLength);
assertEq(detachedGetter.call(buffer), false);
let copy = transfer.call(buffer);
assertEq(detachedGetter.call(buffer), true);
assertEq(byteLengthGetter.call(buffer), 0);
assertEq(detachedGetter.call(copy), false);
assertEq(byteLengthGetter.call(copy), byteLength);
// NOTE: Incorrect realm due to CallNonGenericMethod.
assertEq(copy instanceof g.ArrayBuffer, true);
}
}
}
|
