michael@0: // Test that SavedFrame instances get removed from the SavedStacks frames cache
michael@0: // after a GC.
michael@0: 
michael@0: const FUZZ_FACTOR = 3;
michael@0: 
michael@0: function assertAboutEq(actual, expected) {
michael@0:   if (Math.abs(actual - expected) > FUZZ_FACTOR)
michael@0:     throw new Error("Assertion failed: expected about " + expected + ", got " + actual +
michael@0:                     ". FUZZ_FACTOR = " + FUZZ_FACTOR);
michael@0: }
michael@0: 
michael@0: const stacks = [];
michael@0: 
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: stacks.push(saveStack());
michael@0: 
michael@0: assertAboutEq(getSavedFrameCount(), 50);
michael@0: 
michael@0: while (stacks.length) {
michael@0:   stacks.pop();
michael@0: }
michael@0: gc();
michael@0: 
michael@0: stacks = null;
michael@0: gc();
michael@0: 
michael@0: assertAboutEq(getSavedFrameCount(), 0);