bug-1578462.js - mozsearch

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// |jit-test| skip-if: !hasFunction["gczeal"]

// Check that incoming CCW edges are marked gray in a zone GC if the

// source is gray.

// Set up a new compartment with a gray object wrapper to this

// compartment.

function createOtherCompartment() {

    let t = {};

    addMarkObservers([t]);

    let g = newGlobal({newCompartment: true});

    g.t = t;

    g.eval(`grayRoot().push(t);`);

    g.t = null;

    t = null;

    return g;

function startGCMarking() {

  startgc(1);

  while (gcstate() === "Prepare" || gcstate() === "MarkRoots") {

    gcslice(1);

gczeal(0);

let g = createOtherCompartment();

// The target should be gray in a full GC...

gc();

assertEq(getMarks()[0], "gray");

// and subsequently gray in a zone GC of only this compartment.

gc(this);

assertEq(getMarks()[0], "gray");

// If a barrier marks the gray wrapper black after the start of the

// GC, the target ends up black.

schedulezone(this);

startGCMarking()

assertEq(getMarks()[0], "unmarked");

g.eval(`grayRoot()`); // Barrier marks gray roots black.

assertEq(getMarks()[0], "black");

finishgc();

// A full collection resets the wrapper to gray.

gc();

assertEq(getMarks()[0], "gray");

// If a barrier marks the gray wrapper black after the target has

// already been marked gray, the target ends up black.

gczeal(25); // Yield during gray marking.

schedulezone(this);

startGCMarking();

assertEq(getMarks()[0], "gray");

g.eval(`grayRoot()`); // Barrier marks gray roots black.

assertEq(getMarks()[0], "black");

finishgc();