[tip: perf/core] perf evlist: Introduce append_tp_filter_pid() and append_tp_filter_pids()

[tip-bot2 for Arnaldo Carvalho de Melo]

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     1827ab5ba8e1d0354cc36b3692444306ced01471
Gitweb:        https://git.kernel.org/tip/1827ab5ba8e1d0354cc36b3692444306ced01471
Author:        Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate:    Mon, 07 Oct 2019 17:00:34 -03:00
Committer:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitterDate: Wed, 09 Oct 2019 11:23:52 -03:00

perf evlist: Introduce append_tp_filter_pid() and append_tp_filter_pids()

We'll need this to support 'perf trace e tracepoint --filter=expr', as
the command line tracepoint filter is attache to the preceding evsel,
just like in 'perf record' and when we go to set pid filters, which we
do at the minimum to filter 'perf trace' own syscalls, we need to
append, not set the tp filter.

Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Luis ClÃudio GonÃalves <lclaudio@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Link: https://lkml.kernel.org/n/tip-daynpknni44ywuzi8iua57nn@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/evlist.c | 14 ++++++++++++++
 tools/perf/util/evlist.h |  3 +++
 2 files changed, 17 insertions(+)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 1650d24..e33b46a 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1128,6 +1128,20 @@ int perf_evlist__set_tp_filter_pid(struct evlist *evlist, pid_t pid)
 	return perf_evlist__set_tp_filter_pids(evlist, 1, &pid);
 }
 
+int perf_evlist__append_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids)
+{
+	char *filter = asprintf__tp_filter_pids(npids, pids);
+	int ret = perf_evlist__append_tp_filter(evlist, filter);
+
+	free(filter);
+	return ret;
+}
+
+int perf_evlist__append_tp_filter_pid(struct evlist *evlist, pid_t pid)
+{
+	return perf_evlist__append_tp_filter_pids(evlist, 1, &pid);
+}
+
 bool perf_evlist__valid_sample_type(struct evlist *evlist)
 {
 	struct evsel *pos;
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index c58fd19..1305140 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -142,6 +142,9 @@ int perf_evlist__set_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *
 
 int perf_evlist__append_tp_filter(struct evlist *evlist, const char *filter);
 
+int perf_evlist__append_tp_filter_pid(struct evlist *evlist, pid_t pid);
+int perf_evlist__append_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids);
+
 struct evsel *
 perf_evlist__find_tracepoint_by_id(struct evlist *evlist, int id);