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
|
// Debugger.Memory.prototype.takeCensus: by: allocationStack breakdown
var g = newGlobal({newCompartment: true});
var dbg = new Debugger(g);
g.evaluate(`
var log = [];
function f() { log.push(allocationMarker()); }
function g() { f(); }
function h() { f(); }
`,
{ fileName: "Rockford", lineNumber: 1000 });
// Create one allocationMarker with tracking turned off,
// so it will have no associated stack.
g.f();
dbg.memory.allocationSamplingProbability = 1;
dbg.memory.trackingAllocationSites = true;
for ([f, n] of [[g.f, 20], [g.g, 10], [g.h, 5]])
for (let i = 0; i < n; i++)
f(); // all allocations of allocationMarker occur with this line as the
// oldest stack frame.
let census = dbg.memory.takeCensus({ breakdown: { by: 'objectClass',
then: { by: 'allocationStack',
then: { by: 'count',
label: 'haz stack'
},
noStack: { by: 'count',
label: 'no haz stack'
}
}
}
});
let map = census.AllocationMarker;
assertEq(map instanceof Map, true);
// Gather the stacks we are expecting to appear as keys, and
// check that there are no unexpected keys.
let stacks = { };
map.forEach((v, k) => {
if (k === 'noStack') {
// No need to save this key.
} else if (k.functionDisplayName === 'f' &&
k.parent.functionDisplayName === null) {
stacks.f = k;
} else if (k.functionDisplayName === 'f' &&
k.parent.functionDisplayName === 'g' &&
k.parent.parent.functionDisplayName === null) {
stacks.fg = k;
} else if (k.functionDisplayName === 'f' &&
k.parent.functionDisplayName === 'h' &&
k.parent.parent.functionDisplayName === null) {
stacks.fh = k;
} else {
assertEq(true, false);
}
});
assertEq(map.get('noStack').label, 'no haz stack');
assertEq(map.get('noStack').count, 1);
assertEq(map.get(stacks.f).label, 'haz stack');
assertEq(map.get(stacks.f).count, 20);
assertEq(map.get(stacks.fg).label, 'haz stack');
assertEq(map.get(stacks.fg).count, 10);
assertEq(map.get(stacks.fh).label, 'haz stack');
assertEq(map.get(stacks.fh).count, 5);
|
