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
|
// |jit-test| skip-if: !('gc' in this) || !('clearKeptObjects' in this)
// In generators, when we exit a lexical scope, its non-aliased bindings go away;
// they don't keep their last values gc-alive.
let cases = [
function* onNormalExitFromFunction_VarBinding() {
var tmp = yield 1;
consumeValue(tmp);
},
function* onNormalExitFromFunction_LetBinding() {
let tmp = yield 1;
consumeValue(tmp);
},
function* onNormalExitFromBlock() {
if (typeof onNormalExitFromBlock === 'function') {
let tmp = yield 1;
consumeValue(tmp);
}
yield 2;
},
function* onNormalExitFromCStyleForLet() {
for (let tmp = yield 1; tmp !== null; tmp = null) {
consumeValue(tmp);
}
yield 2;
},
function* onNormalExitFromForLetOf() {
for (let tmp of [yield 1]) {
consumeValue(tmp);
}
yield 2;
},
function* onNormalExitFromForConstOf() {
for (const tmp of [yield 1]) {
consumeValue(tmp);
}
yield 2;
},
function* onNormalExitFromForConstDestructuringOf() {
for (const {a, b, c, d} of [yield 1]) {
consumeValue(a);
}
yield 2;
},
function* onNormalExitFromForConstArrayDestructuringOf() {
for (const [x] of [[yield 1]]) {
consumeValue(x);
}
yield 2;
},
function* onNormalExitFromBlockInLoop() {
for (var i = 0; i < 2; i++) {
if (i == 0) {
let tmp = yield 1;
consumeValue(tmp);
} else {
yield 2;
}
}
},
function* onBreakFromBlock() {
x: {
let tmp = yield 1;
consumeValue(tmp);
break x;
}
yield 2;
},
function* onExitFromCatchBlock() {
try {
throw yield 1;
} catch (exc) {
consumeValue(exc);
}
yield 2;
},
];
var consumeValue;
function runTest(g) {
consumeValue = eval("_ => {}");
let generator = g();
let result = generator.next();
assertEq(result.done, false);
assertEq(result.value, 1);
let object = {};
let weakRef = new WeakRef(object);
result = generator.next(object);
assertEq(result.value, result.done ? undefined : 2);
object = null;
clearKeptObjects();
gc();
assertEq(weakRef.deref(), undefined);
}
for (let g of cases) {
runTest(g);
}
|
