Messages in this thread | | | Date | Mon, 12 May 2014 17:00:30 +0800 | From | xiakaixu <> | Subject | Re: Does perf support different length of user-space hw_breakpoint? |
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于 2014/5/12 16:48, Peter Zijlstra 写道: > On Mon, May 12, 2014 at 04:20:44PM +0800, kaixu xia wrote: >> 2014-05-12 16:05 GMT+08:00 Peter Zijlstra <peterz@infradead.org>: >> >>> 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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