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
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/**
* Test that we correctly merge the three stack types, JS, native, and frame labels.
*/
add_task(async () => {
const entries = 10000;
const interval = 1;
const threads = [];
const features = ["js", "stackwalk"];
await Services.profiler.StartProfiler(entries, interval, features, threads);
// Call the following to get a nice stack in the profiler:
// functionA -> functionB -> functionC
const sampleIndex = await functionA();
const profile = await stopNowAndGetProfile();
const [thread] = profile.threads;
const { samples } = thread;
const inflatedStackFrames = getInflatedStackLocations(
thread,
samples.data[sampleIndex]
);
const nativeStack = /^0x[0-9a-f]+$/;
expectStackToContain(
inflatedStackFrames,
[
"(root)",
nativeStack,
nativeStack,
// There are more native stacks and frame labels here, but we know some execute
// and then the "js::RunScript" frame label runs.
"js::RunScript",
nativeStack,
nativeStack,
// The following regexes match a string similar to:
//
// "functionA (/gecko/obj/_tests/xpcshell/tools/profiler/tests/xpcshell/test_merged_stacks.js:47:0)"
// or
// "functionA (test_merged_stacks.js:47:0)"
//
// this matches the script location
// | match the line number
// | | match the column number
// v v v
/^functionA \(.*test_merged_stacks\.js:\d+:\d+\)$/,
/^functionB \(.*test_merged_stacks\.js:\d+:\d+\)$/,
/^functionC \(.*test_merged_stacks\.js:\d+:\d+\)$/,
// After the JS frames, then there are a bunch of arbitrary native stack frames
// that run.
nativeStack,
nativeStack,
],
"The stack contains a few frame labels, as well as the JS functions that we called."
);
});
async function functionA() {
return functionB();
}
async function functionB() {
return functionC();
}
async function functionC() {
return captureAtLeastOneJsSample();
}
|
