linux-kernel - Re: [PATCH] perf report: Fix a no annotate browser displayed issue

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Date:   Tue, 26 Dec 2017 06:21:27 +0800
From:   "Jin, Yao" <yao.jin@...ux.intel.com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com,
        Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH] perf report: Fix a no annotate browser displayed issue



On 12/26/2017 5:44 AM, Jiri Olsa wrote:
> On Mon, Dec 25, 2017 at 11:58:39AM +0800, Jin, Yao wrote:
>> Hi,
>>
>> Any comments for this bug fix?
> 
> getting segfault with this
> 
> [jolsa@...va perf]$ sudo ./perf record -b ls
> 
> [jolsa@...va perf]$ sudo ./perf report --stdio
> Segmentation fault (core dumped)
> 
> jirka
> 

Sorry about that. My fault, I will debug this issue.

Thanks
Jin Yao

>>
>> Thanks
>> Jin Yao
>>
>> On 12/18/2017 9:26 PM, Jin Yao wrote:
>>> When enabling '-b' option in perf record, for example,
>>>
>>> perf record -b ...
>>> perf report
>>>
>>> and then browsing the annotate browser from perf report, it would
>>> be failed (annotate browser can't be displayed).
>>>
>>> It's because the '.add_entry_cb' op of struct report is overwritten
>>> by hist_iter__branch_callback() in builtin-report.c. But this function
>>> doesn't do something like mapping symbols and sources. So next,
>>> do_annotate() will return directly.
>>>
>>> 	notes = symbol__annotation(act->ms.sym);
>>> 	if (!notes->src)
>>> 		return 0;
>>>
>>> This patch adds the lost code to hist_iter__branch_callback (
>>> refer to hist_iter__report_callback).
>>>
>>> Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
>>> ---
>>>    tools/perf/builtin-report.c | 15 ++++++++++++++-
>>>    1 file changed, 14 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
>>> index eb9ce63..0bd0aef 100644
>>> --- a/tools/perf/builtin-report.c
>>> +++ b/tools/perf/builtin-report.c
>>> @@ -162,12 +162,25 @@ static int hist_iter__branch_callback(struct hist_entry_iter *iter,
>>>    	struct hist_entry *he = iter->he;
>>>    	struct report *rep = arg;
>>>    	struct branch_info *bi;
>>> +	struct perf_sample *sample = iter->sample;
>>> +	struct perf_evsel *evsel = iter->evsel;
>>> +	int err;
>>> +
>>> +	hist__account_cycles(sample->branch_stack, al, sample,
>>> +			     rep->nonany_branch_mode);
>>>    	bi = he->branch_info;
>>> +	err = addr_map_symbol__inc_samples(&bi->from, sample, evsel->idx);
>>> +	if (err)
>>> +		goto out;
>>> +
>>> +	err = addr_map_symbol__inc_samples(&bi->to, sample, evsel->idx);
>>> +
>>>    	branch_type_count(&rep->brtype_stat, &bi->flags,
>>>    			  bi->from.addr, bi->to.addr);
>>> -	return 0;
>>> +out:
>>> +	return err;
>>>    }
>>>    static int process_sample_event(struct perf_tool *tool,
>>>