Re: Re: [PATCH perf/core 5/8] perf probe: Allow to use filter on --del command

Masami Hiramatsu
2015-04-23T13:11:08Z

(2015/04/22 22:56), Namhyung Kim wrote:
> On Tue, Apr 21, 2015 at 08:42:06PM +0900, Masami Hiramatsu wrote:
>> -int del_perf_probe_events(struct strlist *dellist)
>> +int del_perf_probe_events(struct strfilter *filter)
>> {
>> - int ret = -1, ret2, ufd = -1, kfd = -1;
>> - char buf[128];
>> - const char *group, *event;
>> - char *p, *str;
>> - struct str_node *ent;
>> + int ret = 0, ufd = -1, kfd = -1;
>> struct strlist *namelist = NULL, *unamelist = NULL;
>> + char *str = strfilter__string(filter);
>
> You may want to check the return value here - or in the
> strfilter__string() ?

Ah, right. Even though this str is only for debugging, it
is better to verify the filter is correctly built by
strfilter__string.

I'll check the return value here.

>
> Thanks,
> Namhyung
>
>
>> +
>> + pr_debug("Filter: \'%s\'\n", str);
>
> [SNIP]
>> +char *strfilter__string(struct strfilter *filter)
>> +{
>> + int len;
>> + char *ret = NULL;
>> +
>> + len = strfilter_node__sprint(filter->root, NULL);
>> + if (len < 0)
>> + return NULL;
>> +
>> + ret = malloc(len + 1);
>
> Here?

Oops, of course there need another check :)
this is just a simple care-less miss.

Thanks again!

>
>> + strfilter_node__sprint(filter->root, ret);
>> +
>> + return ret;
>> +}
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--
Masami HIRAMATSU
Linux Technology Research Center, System Productivity Research Dept.
Center for Technology Innovation - Systems Engineering
Hitachi, Ltd., Research & Development Group
E-mail: masami.hiramatsu.pt@hitachi.com