blob: 9eb11d9afe8e735f5abba0a96b550cd7e25543f0 (
plain)
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
|
/* Any copyright is dedicated to the Public Domain.
http://creativecommons.org/publicdomain/zero/1.0/ */
// Test that we can save a core dump with very deep allocation stacks and read
// it back into a HeapSnapshot.
function stackDepth(stack) {
return stack ? 1 + stackDepth(stack.parent) : 0;
}
function run_test() {
// Create a Debugger observing a debuggee's allocations.
const debuggee = new Cu.Sandbox(null);
const dbg = new Debugger(debuggee);
dbg.memory.trackingAllocationSites = true;
// Allocate some objects in the debuggee that will have their allocation
// stacks recorded by the Debugger.
debuggee.eval("this.objects = []");
debuggee.eval(
(function recursiveAllocate(n) {
if (n <= 0)
return;
// Make sure to recurse before pushing the object so that when TCO is
// implemented sometime in the future, it doesn't invalidate this test.
recursiveAllocate(n - 1);
this.objects.push({});
}).toString()
);
debuggee.eval("recursiveAllocate = recursiveAllocate.bind(this);");
debuggee.eval("recursiveAllocate(200);");
// Now save a snapshot that will include the allocation stacks and read it
// back again.
const filePath = ChromeUtils.saveHeapSnapshot({ runtime: true });
ok(true, "Should be able to save a snapshot.");
const snapshot = ChromeUtils.readHeapSnapshot(filePath);
ok(snapshot, "Should be able to read a heap snapshot");
ok(snapshot instanceof HeapSnapshot, "Should be an instanceof HeapSnapshot");
const report = snapshot.takeCensus({
breakdown: { by: "allocationStack",
then: { by: "count", bytes: true, count: true },
noStack: { by: "count", bytes: true, count: true }
}
});
// Keep this synchronized with `HeapSnapshot::MAX_STACK_DEPTH`!
const MAX_STACK_DEPTH = 60;
let foundStacks = false;
report.forEach((v, k) => {
if (k === "noStack") {
return;
}
foundStacks = true;
const depth = stackDepth(k);
dumpn("Stack depth is " + depth);
ok(depth <= MAX_STACK_DEPTH,
"Every stack should have depth less than or equal to the maximum stack depth");
});
ok(foundStacks);
do_test_finished();
}
|
