src/third_party/mozjs-45/js/src/jit-test/tests/gc/incremental-state.js

/*
 * Test expected state changes during collection.
 */

if (!("gcstate" in this))
    quit();

gczeal(0);

/* Non-incremental GC. */
gc();
assertEq(gcstate(), "none");

/* Incremental GC in one slice. */
gcslice(1000000);
assertEq(gcstate(), "none");

/* 
 * Incremental GC in multiple slices: if marking takes more than one slice,
 * we yield before we start sweeping.
 */
gczeal(0);
gcslice(1);
assertEq(gcstate(), "mark");
gcslice(1000000);
assertEq(gcstate(), "mark");
gcslice(1000000);
assertEq(gcstate(), "none");

/* Zeal mode 8: Incremental GC in two slices: 1) mark roots 2) finish collection. */
gczeal(8);
gcslice(1);
assertEq(gcstate(), "mark");
gcslice(1);
assertEq(gcstate(), "none");

/* Zeal mode 9: Incremental GC in two slices: 1) mark all 2) new marking and finish. */
gczeal(9);
gcslice(1);
assertEq(gcstate(), "mark");
gcslice(1);
assertEq(gcstate(), "none");

/* Zeal mode 10: Incremental GC in multiple slices (always yeilds before sweeping). */
gczeal(10);
gcslice(1000000);
assertEq(gcstate(), "sweep");
gcslice(1000000);
assertEq(gcstate(), "none");