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Re: How to track the functions in self-written module using SystemTap?
- From: Nan Xiao <xiaonan830818 at gmail dot com>
- To: David Smith <dsmith at redhat dot com>
- Cc: systemtap at sourceware dot org
- Date: Thu, 26 Nov 2015 14:10:37 +0800
- Subject: Re: How to track the functions in self-written module using SystemTap?
- Authentication-results: sourceware.org; auth=none
- References: <CA+MhoaPMSTgpHCDjNhwcDkMaLryLy+F6tH6HNcrvDDF9bEbBbg at mail dot gmail dot com> <564B5A4C dot 1080302 at redhat dot com> <CA+MhoaNG0hENo=cnOrxogX2qofdQodh-sY7mbKoZabn+L5GgFg at mail dot gmail dot com> <564CD3C1 dot 2090900 at redhat dot com> <CA+MhoaPxCC1_CH86A7SuXaoNEJyzaRvv2wpha8shF4V8T9WeOQ at mail dot gmail dot com> <CA+MhoaPGgWuVCEnW8p6cvbN_6qFE1jeDjz+pYtDuCbL00b5Ong at mail dot gmail dot com> <564DE376 dot 3020104 at redhat dot com>
Hi David,
I do "insmod kex.ko" and "rmmod kex" repeatedly, but It seems the
related probes can't be triggered:
# stap -l 'module("/root/kernel/105.ops/kex.ko").function("*")'
module("/root/kernel/105.ops/kex.ko").function("_open@/root/kernel/105.ops/kex.c:21")
module("/root/kernel/105.ops/kex.ko").function("_read@/root/kernel/105.ops/kex.c:45")
module("/root/kernel/105.ops/kex.ko").function("_release@/root/kernel/105.ops/kex.c:33")
module("/root/kernel/105.ops/kex.ko").function("copy_to_user@/usr/src/kernels/3.10.0-123.el7.x86_64.debug/arch/x86/include/asm/uaccess_64.h:72")
module("/root/kernel/105.ops/kex.ko").function("kex_cleanup@/root/kernel/105.ops/kex.c:90")
module("/root/kernel/105.ops/kex.ko").function("kex_init@/root/kernel/105.ops/kex.c:61")
# stap -e 'probe
module("/root/kernel/105.ops/kex.ko").function("kex_init"),
module("/root/kernel/105.ops/kex.ko").function("kex_cleanup")
{print_backtrace()}'
Could you help to check it? Thanks in advance!
Best Regards
Nan Xiao
On Thu, Nov 19, 2015 at 10:57 PM, David Smith <dsmith@redhat.com> wrote:
> On 11/19/2015 02:33 AM, Nan Xiao wrote:
>> Hi David,
>>
>> Another interesting thing: if there is a "-" in path, the SystemTap
>> also fail to parse:
>
> That's odd. I've added that information to the bug.
>
> --
> David Smith
> dsmith@redhat.com
> Red Hat
> http://www.redhat.com
> 256.217.0141 (direct)
> 256.837.0057 (fax)