Function start

vm/ByteCodeTranslator/src/javascript/parparvm_runtime.js:3405–3435

()

    this.resolvedVirtualCache = Object.create(null);
  },
  start() {
    if (!this.mainClass || !this.mainMethod) {
      vmLifecycle("start-failed-no-main");
      throw new Error("No main class configured for javascript backend");
    }
    vmLifecycle("start:mainClass=" + this.mainClass);
    vmDiag("LIFECYCLE_START", "mainClass", this.mainClass);
    this.applyNativeOverrides();
    ensureSystemPrintStreams();
    vmTrace("runtime.start.before-main-generator");
    const mainArgs = this.newArray(0, "java_lang_String", 1);
    const mainThreadObject = this.newObject("java_lang_Thread");
    mainThreadObject[CN1_THREAD_ALIVE] = 1;
    mainThreadObject[CN1_THREAD_NAME] = this.createStringLiteral("main");
    this.mainThreadObject = mainThreadObject;
    vmLifecycle("start:invoking-main-method=" + this.mainMethod);
    const mainGenerator = global[this.mainMethod](mainArgs);
    vmLifecycle("start:main-method-returned=" + (mainGenerator != null && typeof mainGenerator.next === "function" ? "generator" : "sync"));
    vmTrace("runtime.start.after-main-generator");
    const mainThread = this.spawn(mainThreadObject, mainGenerator);
    // Stash the main thread + object so the drain loop can identify
    // when the main bytecode completes vs when an auxiliary thread
    // (e.g. a CN1SS test runner Thread or worker callback) finishes.
    this.mainThread = mainThread;
    vmTrace("runtime.start.after-spawn");
    this.currentThread = mainThread;
    vmTrace("runtime.start.before-drain");
    this.drain();
    vmTrace("runtime.start.after-drain");
    vmLifecycle("start:drain-returned threads=" + this.threads.length);
  },
  describeProtocol() {
    return {
      type: this.protocol.messages.PROTOCOL,