bug-1997822.js - mozsearch

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// Check gray unmarking running as part of incremental GC correctly unmarks

// edges traced via virtual dispatch on the marking tracer.

function checkMarks(expected) {

  assertEq(getMarks().join(", "), expected.join(", "));

gczeal(0);

gczeal('CheckGrayMarking');

gc();

let s = Symbol();

addMarkObservers([s]);

let m = new Map();

m.set({}, s);

addMarkObservers([m]);

grayRoot()[0] = m;

s = undefined;

m = undefined;

gc();

checkMarks(['gray', 'gray']);

schedulezone(this);

startgc(1);

while (gcstate() === 'Prepare') {

  gcslice(10);

print(gcstate());

m = grayRoot()[0];

finishgc();

checkMarks(['black', 'black']);