probe process.mark("probe0") 
{
    printf("PASS: %s\n", $$name)
}

probe process.mark("probe1") 
{
    if ($arg1 == 42)
        printf("PASS: %s\n", $$name)
    else
        printf("FAIL: %s (%d != 42)\n", $$name, $arg1)
}
