onNewScript-wasm-02.js

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// |jit-test| skip-if: !wasmDebuggingEnabled()

// Draining the job queue from an onNewScript hook reporting a streamed wasm

// module should not deadlock.

ignoreUnhandledRejections();

try {

    WebAssembly.compileStreaming();

    // Avoid mixing the test's jobs with the debuggee's, so that

    // automated checks can make sure AutoSaveJobQueue only

    // suspends debuggee work.

    drainJobQueue();

} catch (err) {

    assertEq(String(err).indexOf("not supported with --no-threads") !== -1, true);

    quit();

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

var source = new g.Uint8Array(wasmTextToBinary('(module (func unreachable))'));

g.source = source;

var dbg = new Debugger(g);

dbg.allowWasmBinarySource = true;

dbg.onNewScript = function (s, g) {

  drainJobQueue();

};

// For the old code to deadlock, OffThreadPromiseRuntimeState::internalDrain

// needs to get two Dispatchables at once when it swaps queues. A call to

// instantiateStreaming enqueues a job that will kick off a helper thread, so to

// make sure that two helper threads have had time to complete and enqueue their

// Dispatchables, we put a delay in the job queue after the helper thread

// launches.

g.eval(`

  WebAssembly.instantiateStreaming(source);

  WebAssembly.instantiateStreaming(source);

  Promise.resolve().then(() => sleep(0.1));

`);

drainJobQueue();