VM.assert(isPageAligned(address) && isPageMultiple(size));
VM._assert(isPageAligned(address) && isPageMultiple(size));
  public static boolean msync(VM_Address address, int size, int flags) {    if (VM.VerifyAssertions)      VM.assert(isPageAligned(address) && isPageMultiple(size));    VM_BootRecord bootRecord = VM_BootRecord.the_boot_record;    return VM.sysCall3(bootRecord.sysMSyncIP, address.toInt(), size, flags) == 0;  }