Frame-identity-06.js

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// Debugger.Frames for async functions are not GC'd while they're suspended.

// The awaited promise keeps the generator alive, via its reaction lists.

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

g.eval(`

    // Create a few promises.

    var promises = [], resolvers = [];

    for (let i = 0; i < 3; i++)

        promises.push(new Promise(r => { resolvers.push(r); }));

    async function f() {

        debugger;

        for (let p of promises) {

            await p;

            debugger;

`);

var dbg = new Debugger(g);

var hits = 0;

dbg.onDebuggerStatement = function (frame) {

    if (hits === 0)

        frame.seen = true;

    else

        assertEq(frame.seen, true);

    hits++;

};

let done = false;

g.f().then(_ => { done = true; });

gc();

drainJobQueue();

gc();

// Resolve the promises one by one.

for (let [i, resolve] of g.resolvers.entries()) {

    assertEq(hits, 1 + i);

    assertEq(done, false);

    resolve("x");

    gc();

    drainJobQueue();

    gc();

assertEq(hits, 1 + g.resolvers.length);

assertEq(done, true);