michael@0: // If a Debugger survives its debuggee, its object cache must still be swept.
michael@0: 
michael@0: var g2arr = []; // non-debuggee globals
michael@0: var xarr = []; // debuggee objects
michael@0: 
michael@0: var N = 4, M = 4;
michael@0: for (var i = 0; i < N; i++) {
michael@0:     var g1 = newGlobal();
michael@0:     g1.M = M;
michael@0:     var dbg = new Debugger(g1);
michael@0:     var g2 = g1.eval("newGlobal('same-compartment')");
michael@0:     g1.x = g2.eval("x = {};");
michael@0: 
michael@0:     dbg.onDebuggerStatement = function (frame) { xarr.push(frame.eval("x").return); };
michael@0:     g1.eval("debugger;");
michael@0:     g2arr.push(g2);
michael@0: 
michael@0:     g1 = null;
michael@0:     gc();
michael@0: }
michael@0: 
michael@0: // At least some of the debuggees have probably been collected at this
michael@0: // point. It is nondeterministic, though.
michael@0: assertEq(g2arr.length, N);
michael@0: assertEq(xarr.length, N);
michael@0: 
michael@0: // Try to make g2arr[i].eval eventually allocate a new object in the same
michael@0: // location as a previously gc'd object. If the object caches are not being
michael@0: // swept, the pointer coincidence will cause a Debugger.Object to be erroneously
michael@0: // reused.
michael@0: for (var i = 0; i < N; i++) {
michael@0:     var obj = xarr[i];
michael@0:     for (j = 0; j < M; j++) {
michael@0:         assertEq(obj instanceof Debugger.Object, true);
michael@0:         g2arr[i].eval("x = x.prop = {};");
michael@0:         obj = obj.getOwnPropertyDescriptor("prop").value;;
michael@0:         assertEq("seen" in obj, false);
michael@0:         obj.seen = true;
michael@0:         gc();
michael@0:     }
michael@0: }