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| author |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-10-07 16:52:17 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-10-09 11:23:52 -0300 |
| commit | 53c92f73389d049d72b2e1d1cbc81c007241d422 (patch) | |
| tree | a7a21a337a5fcfdfdef5bec1288c63547ca6cb3a /tools/perf/util/evlist.c | |
| parent | perf evlist: Factor out asprintf routine to build a tracepoint pid filter (diff) | |
| download | linux-dev-53c92f73389d049d72b2e1d1cbc81c007241d422.tar.xz linux-dev-53c92f73389d049d72b2e1d1cbc81c007241d422.zip | |
perf evlist: Introduce append_tp_filter() method
Will be used by 'perf trace' to support 'perf trace --filter', we need
to append to any pre-existing filter.
When parse_filter() gets invoked to process --filter, it'll set the
filter to that specified on the command line, later on, when we filter
out 'perf trace' own pid to avoid an event feedback loop, we need to
preserve the command line filter put in place by parse_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-h9rot08qmxlnfmte0holt68x@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/evlist.c')
| -rw-r--r-- | tools/perf/util/evlist.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index c1b46080426b..1650d242a1c8 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -1068,6 +1068,26 @@ int perf_evlist__set_tp_filter(struct evlist *evlist, const char *filter) return err; } +int perf_evlist__append_tp_filter(struct evlist *evlist, const char *filter) +{ + struct evsel *evsel; + int err = 0; + + if (filter == NULL) + return -1; + + evlist__for_each_entry(evlist, evsel) { + if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT) + continue; + + err = perf_evsel__append_tp_filter(evsel, filter); + if (err) + break; + } + + return err; +} + static char *asprintf__tp_filter_pids(size_t npids, pid_t *pids) { char *filter; |