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Date: Sat, 25 Mar 2006 01:29:00 -0000
From: "Kevin Jia" <jiaminghao@gmail.com>
To: systemtap@sourceware.org
Subject: about systemtap test!
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Two problems:

1. I use the follow program for testing:

    probe kernel.function("sys_open")
{
    printf("%s(%d)open(%s)\n", execname(), pid(), argstr)
}
probe timer.ms(4000)
{
    exit()
}

   the result looks like this:

    udev(10266) open()
    udev(10266) open()
    udev(10266) open()
    nifd(1383) open()
    ...
So why have not anything include the open's parenttheses? And what
meaning of the "argstr"?

2. how use systemtap probes the watchpoint? Can you give me some examples?

thanks.