Re: Does perf support different length of user-space hw_breakpoint?

[xiakaixu]

ping....
ä 2014/5/12 17:00, xiakaixu åé:
> ä 2014/5/12 16:48, Peter Zijlstra åé:
>> On Mon, May 12, 2014 at 04:20:44PM +0800, kaixu xia wrote:
>>> 2014-05-12 16:05 GMT+08:00 Peter Zijlstra <peterz@xxxxxxxxxxxxx>:
>>>
>>>> On Mon, May 12, 2014 at 03:52:54PM +0800, xiakaixu wrote:
>>>>> Hi guys,
>>>>>
>>>>> Does perf support different length of user-space hw_breakpoint,
>>>>> such as  HW_BREAKPOINT_LEN_1/HW_BREAKPOINT_LEN_2/HW_BREAKPOINT_LEN_4/
>>>>> HW_BREAKPOINT_LEN_8?
>>>>>
>>>>> Seems perf only support HW_BREAKPOINT_LEN_4/sizeof(long)
>>>>> by default from the source code and simple test.
>>>>>
>>>>> May I have your opinions if I want to trace different bytes of
>>>>> hw_breakpoint addr?
>>>>
>>>> Frederic?
>>>>
>>>
>>> Sorry, can not fully understand it. Can you give more details on that?
>>
>> I asked Frederic to answer your question :-)
>>
> Thanks:-)
> 
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