lkml.org 
[lkml]   [2014]   [Dec]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v14 7/7] ARM: kprobes: enable OPTPROBES for ARM 32
On 2014/12/8 21:22, Jon Medhurst (Tixy) wrote:
> On Mon, 2014-12-08 at 20:31 +0800, Wang Nan wrote:
>> On 2014/12/8 20:06, Wang Nan wrote:
>>> On 2014/12/8 19:50, Jon Medhurst (Tixy) wrote:
>>>> On Mon, 2014-12-08 at 19:15 +0800, Wang Nan wrote:
>>>>> On 2014/12/8 19:04, Jon Medhurst (Tixy) wrote:
>>>>>> On Mon, 2014-12-08 at 14:28 +0800, Wang Nan wrote:
>> [...]
>>>>
>>>> so another CPU could find and delete next before this one has finished
>>>> doing so. Would the list end up in a consistent state where no loops
>>>> develop and no probes are missed? I don't know the answer and a full
>>>> analysis would be complicated, but my gut feeling is that if a cpu can
>>>> observe the links in the list in an inconsistent state then only bad
>>>> things can result.
>>>>
>>>
>>> I see the problem.
>>>
>>> I'm thinking about making core.c and opt-arm.c to share stop_machine() code.
>>> stop_machine() is required when removing breakpoint, so I'd like to define
>>> a "remove_breakpoint" function in core.c and make opt-arm.c to call it.
>>> Do you think it is a good idea?
>>>
>>>
>>
>> What I mean is something like this:
>
> Yes, that should work, though as remove_breakpoint is a globally visible
> symbol, I suggest a less generic name for it, perhaps
> remove_kprobe_breakpoint ?
>

I don't think it is globally visible. Only files in arm/probes/kprobes
can include "core.h". However, I do agree that remove_breakpoint() is not
a good name. In my v15 patch, I'd like to rename it to kprobe_remove_breakpoint(),
due to may of names defined in core.h are called kprobes_xxx.

Thank you!




\
 
 \ /
  Last update: 2014-12-08 15:21    [W:0.120 / U:0.052 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site