many-outstanding.js

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// Create a bunch of outstanding suspended stacks and test GC behaviour.

let promises = [];

function js_import() {

  return Promise.resolve(13);

let wasm_js_import = new WebAssembly.Suspending(js_import);

var ins = wasmEvalText(`(module

  (import "m" "import" (func (result externref)))

  (global (export "outstanding") (mut i32) (i32.const 0))

  (func (export "test") (param externref) (result externref)

    local.get 0

    global.get 0

    i32.const 1

    i32.add

    global.set 0

    call 0

    drop

    global.get 0

    i32.const 1

    i32.sub

    global.set 0

    return

)`, {

  m: {

    import: wasm_js_import

},

});

let wrapped_export = WebAssembly.promising(ins.exports.test);

assertEq(ins.exports.outstanding.value, 0);

let count = 100;

for (let i = 0; i < count; i++) {

  wrapped_export({i}).then((x) => assertEq(x.i, i));

assertEq(ins.exports.outstanding.value, count);

gczeal(10, 2);

drainJobQueue();

assertEq(ins.exports.outstanding.value, 0);