onExceptionUnwind-generators-01.js

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// Generator/async frames can be created and revived by the onExceptionUnwind hook.

//

// Modified copy of Frame-older-generators-01.js.

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

g.eval(`

    function* gen() {

        try { throw new Error("bad"); } catch { }

        yield 1;

        try { throw new Error("bad"); } catch { }

    async function af() {

        try { throw new Error("bad"); } catch { }

        await 1;

        try { throw new Error("bad"); } catch { }

`);

function test(expected, code) {

    let dbg = Debugger(g);

    let hits = 0;

    let genFrame = null;

    dbg.onExceptionUnwind = frame => {

        hits++;

        if (genFrame === null) {

            genFrame = frame;

        } else {

            assertEq(frame, genFrame);

        assertEq(genFrame.callee.name, expected);

    g.eval(code);

    assertEq(hits, 2);

    dbg.removeDebuggee(g);

test("gen", "for (var x of gen()) {}");

test("af", "af(); drainJobQueue();");