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// Check counts produced by takeCensus.
//
// Note that tracking allocation sites adds unique IDs to objects which
// increases their size, making it hard to test reported sizes exactly.
let g = newGlobal({newCompartment: true});
let dbg = new Debugger(g);
let sizeOfAM = byteSize(allocationMarker());
// Allocate a single allocation marker, and check that we can find it.
g.eval('var hold = allocationMarker();');
let census = dbg.memory.takeCensus({ breakdown: { by: 'objectClass' } });
assertEq(census.AllocationMarker.count, 1);
assertEq(census.AllocationMarker.bytes, sizeOfAM);
g.evaluate(`
var objs = [];
function fnerd() {
objs.push(allocationMarker());
for (let i = 0; i < 10; i++)
objs.push(allocationMarker());
}
`,
{ fileName: 'J. Edgar Hoover', lineNumber: 2000 });
dbg.memory.allocationSamplingProbability = 1;
dbg.memory.trackingAllocationSites = true;
g.hold = null;
g.fnerd();
census = dbg.memory.takeCensus({
breakdown: { by: 'objectClass',
then: { by: 'allocationStack' }
}
});
let seen = 0;
census.AllocationMarker.forEach((v, k) => {
assertEq(k.functionDisplayName, 'fnerd');
assertEq(k.source, 'J. Edgar Hoover');
switch (k.line) {
case 2003:
assertEq(v.count, 1);
assertEq(v.bytes >= sizeOfAM, true);
seen++;
break;
case 2005:
assertEq(v.count, 10);
assertEq(v.bytes >= 10 * sizeOfAM, true);
seen++;
break;
default: assertEq(true, false);
}
});
assertEq(seen, 2);
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