Frame-identity-03.js

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// Test that we create new Debugger.Frames and reuse old ones correctly with recursion.

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

g.debuggeeGlobal = this;

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

        function id(f) {

            return ("id" in f) ? f.id : (f.id = nextid++);

        var dbg = new Debugger(debuggeeGlobal);

        dbg.onDebuggerStatement = function (frame) {

            var a = [];

            for (; frame; frame = frame.older)

                a.push(frame);

            var s = '';

            while (a.length)

                s += id(a.pop());

            results.push(s);

};

    } + ")();");

function cons(a, b) {

    debugger;

    return [a, b];

function tree(n) {

    if (n < 2)

        return n;

    return cons(tree(n - 1), tree(n - 2));

g.eval("results = []; nextid = 0;");

debugger;

assertEq(g.results.join(","), "0");

assertEq(g.nextid, 1);

g.eval("results = [];");

tree(2);

assertEq(g.results.join(","), "012"); // 0=global, 1=tree, 2=cons

g.eval("results = []; nextid = 1;");

tree(3);

assertEq(g.results.join(","), "0123,014"); //0=global, 1=tree(3), 2=tree(2), 3=cons, 4=cons

g.eval("results = []; nextid = 1;");

tree(4);

// 0=global, 1=tree(4), 2=tree(3), 3=tree(2), 4=cons, tree(1), 5=cons, 6=tree(2), 7=cons, 8=cons

assertEq(g.results.join(","), "01234,0125,0167,018");