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@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-daynpknni44ywuzi8iua57nn@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 1650d242a1c8a5a111c8a55f08c14821c937d612..e33b46aca5cbdbbcb99adb84f3839ae732b3299d 100644 (file)
--- 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 c58fd1908bfc66555a8dd16b0769501fc7182c29..13051409fd22514344783688461350927236033b 100644 (file)
--- 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);