On Wed, Jul 17, 2013 at 04:33:13PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Wed, Jul 17, 2013 at 07:49:45PM +0200, Jiri Olsa escreveu:
> > +static struct perf_evlist *get_evlist(void)
> > +{
> > + int err;
> > + struct perf_evlist *evlist = perf_evlist__new();
> > + if (evlist == NULL) {
> > + pr_err("perf_evlist__new failed\n");
> > + return NULL;
> > + }
> > + err = perf_evlist__add_default(evlist);
> > + if (err < 0) {
> > + pr_err("Not enough memory to create evsel\n");
> > + perf_evlist__delete(evlist);
> > + evlist = NULL;
> > + }
> > + return evlist;
> > +}
>
> I think the above can be such a common idiom that having a new
> constructor for it is doable, i.e.:
>
> evlist = perf_evlist__new_default(void);
> if (evlist == NULL)
> pr_debug, etc
ook
>
> > +
> > +static union perf_event *get_event_MMAP(void)
> > +{
> > + static union perf_event event;
> > + size_t size;
> > +
> > + size = snprintf(event.mmap.filename, sizeof(event.mmap.filename),
> > + "krava") + 1;
> > + size = PERF_ALIGN(size, sizeof(u64));
> > +
> > + event.header.type = PERF_RECORD_MMAP;
> > + event.header.misc = PERF_RECORD_MISC_KERNEL;
> > + event.header.size = sizeof(event.mmap) -
> > + (sizeof(event.mmap.filename) - size);
> > +
> > + event.mmap.pgoff = 10;
> > + event.mmap.start = 0;
> > + event.mmap.len = 10;
> > + event.mmap.pid = 123;
> > +
> > + return &event;
> > +}
>
> Don't use statics, here perhaps we can have another general purpose
> helper:
>
> void perf_event__init_mmap(union perf_event *event)
>
> We then could use it on the synthesizing routines, etc.
ook
>
SNIP
> > +
> > +static int store_event(int fd, union perf_event *event, size_t *size)
> > +{
> > + *size += event->header.size;
> > + return write(fd, event, event->header.size) > 0 ? 0 : -1;
> > +}
>
> I think we need a writen like we have readn and then do it like:
>
> return writen(fd, event, event->header.size) == event->header.size ? 0
> : -1;
hum, we could generalize write_output function from builtin-record
>
> ?
>
SNIP
> > +
> > + TEST_ASSERT_VAL("failed to write header",
> > + !perf_session__write_header(session, evlist, fd, true));
>
> Humm, can't perf_session__write_header use session->fd? Just like you
> did for some other routines in previous patches in this series?
right, but need to check if the builtin-inject caller uses the same fd
thanks,
jirka
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