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/* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/publicdomain/zero/1.0/ */
"use strict";
add_task(async function () {
const target = await addTabTarget("data:text/html;charset=utf-8,test-doc");
const memory = await target.getFront("memory");
await memory.attach();
await memory.startRecordingAllocations();
ok(true, "Can start recording allocations");
// Allocate some objects.
const [line1, line2, line3] = await SpecialPowers.spawn(
gBrowser.selectedBrowser,
[],
function () {
// Use eval to ensure allocating the object in the page's compartment
return content.eval(
"(" +
function () {
let alloc1, alloc2, alloc3;
/* eslint-disable max-nested-callbacks */
(function outer() {
(function middle() {
(function inner() {
alloc1 = {};
alloc1.line = Error().lineNumber;
alloc2 = [];
alloc2.line = Error().lineNumber;
// eslint-disable-next-line new-parens
alloc3 = new (function () {})();
alloc3.line = Error().lineNumber;
})();
})();
})();
/* eslint-enable max-nested-callbacks */
return [alloc1.line, alloc2.line, alloc3.line];
} +
")()"
);
}
);
const response = await memory.getAllocations();
await memory.stopRecordingAllocations();
ok(true, "Can stop recording allocations");
// Filter out allocations by library and test code, and get only the
// allocations that occurred in our test case above.
function isTestAllocation(alloc) {
const frame = response.frames[alloc];
return (
frame &&
frame.functionDisplayName === "inner" &&
(frame.line === line1 || frame.line === line2 || frame.line === line3)
);
}
const testAllocations = response.allocations.filter(isTestAllocation);
Assert.greaterOrEqual(
testAllocations.length,
3,
"Should find our 3 test allocations (plus some allocations for the error " +
"objects used to get line numbers)"
);
// For each of the test case's allocations, ensure that the parent frame
// indices are correct. Also test that we did get an allocation at each
// line we expected (rather than a bunch on the first line and none on the
// others, etc).
const expectedLines = new Set([line1, line2, line3]);
is(expectedLines.size, 3, "We are expecting 3 allocations");
for (const alloc of testAllocations) {
const innerFrame = response.frames[alloc];
ok(innerFrame, "Should get the inner frame");
is(innerFrame.functionDisplayName, "inner");
expectedLines.delete(innerFrame.line);
const middleFrame = response.frames[innerFrame.parent];
ok(middleFrame, "Should get the middle frame");
is(middleFrame.functionDisplayName, "middle");
const outerFrame = response.frames[middleFrame.parent];
ok(outerFrame, "Should get the outer frame");
is(outerFrame.functionDisplayName, "outer");
// Not going to test the rest of the frames because they are Task.jsm
// and promise frames and it gets gross. Plus, I wouldn't want this test
// to start failing if they changed their implementations in a way that
// added or removed stack frames here.
}
is(expectedLines.size, 0, "Should have found all the expected lines");
await memory.detach();
await target.destroy();
});
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