VM.enableGC();
VM.enableGC(true);
  private static void ReleasePrimitiveArrayCritical(VM_JNIEnvironment env, int arrayJREF,                                                     VM_Address arrayCopyAddress, int mode) {    if (traceJNI) VM.sysWrite("JNI called: ReleasePrimitiveArrayCritical \n");       try {      VM.enableGC();    } catch (Throwable unexpected) {      if (traceJNI) unexpected.printStackTrace(System.err);      env.recordException(unexpected);    }  }