Frame-onStack-01.js

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// Debugger.Frame.prototype.onStack is true for frames on the stack and false for

// frames that have returned

var desc = Object.getOwnPropertyDescriptor(Debugger.Frame.prototype, "live");

assertEq(typeof desc.get, "function");

assertEq(desc.set, undefined);

assertEq(desc.configurable, true);

assertEq(desc.enumerable, false);

var loc;

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

g.debuggeeGlobal = this;

g.eval("var hits = 0;");

g.eval("(" + function () {

        var a = [];

        var dbg = Debugger(debuggeeGlobal);

        dbg.onDebuggerStatement = function (frame) {

            var loc = debuggeeGlobal.loc;

            a[loc] = frame;

            for (var i = 0; i < a.length; i++) {

                assertEq(a[i] === frame, i === loc);

                assertEq(!!(a[i] && a[i].onStack), i >= loc);

            hits++;

};

    } + ")()");

function f(n) {

    loc = n; debugger;

    if (n !== 0) {

        f(n - 1);

        loc = n; debugger;

        eval("f(n - 1);");

        loc = n; debugger;

f(4);

assertEq(g.hits, 16 + 8*3 + 4*3 + 2*3 + 1*3);