[PATCH 05/14] perf tools: Add parse_events_fake interface

Jiri Olsa
2020-05-24T22:42:50Z

Adding parse_events_fake interface to parse events
and use fake pmu event in case pmu event is parsed.

This way it's possible to parse events from PMUs
which are not present in the system. It's available
only for testing purposes coming in following
changes.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/util/parse-events.c | 48 +++++++++++++++++++++++++---------
tools/perf/util/parse-events.h | 2 ++
2 files changed, 37 insertions(+), 13 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 8304f9b6e6be..89239695a728 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -2082,22 +2082,15 @@ int parse_events_terms(struct list_head *terms, const char *str)
return ret;
}

-int parse_events(struct evlist *evlist, const char *str,
- struct parse_events_error *err)
+static int parse_events_state(struct parse_events_state *parse_state,
+ struct evlist *evlist, const char *str)
{
- struct parse_events_state parse_state = {
- .list = LIST_HEAD_INIT(parse_state.list),
- .idx = evlist->core.nr_entries,
- .error = err,
- .evlist = evlist,
- .stoken = PE_START_EVENTS,
- };
int ret;

- ret = parse_events__scanner(str, &parse_state);
+ ret = parse_events__scanner(str, parse_state);
perf_pmu__parse_cleanup();

- if (!ret && list_empty(&parse_state.list)) {
+ if (!ret && list_empty(&parse_state->list)) {
WARN_ONCE(true, "WARNING: event parser found nothing\n");
return -1;
}
@@ -2105,12 +2098,12 @@ int parse_events(struct evlist *evlist, const char *str,
/*
* Add list to the evlist even with errors to allow callers to clean up.
*/
- perf_evlist__splice_list_tail(evlist, &parse_state.list);
+ perf_evlist__splice_list_tail(evlist, &parse_state->list);

if (!ret) {
struct evsel *last;

- evlist->nr_groups += parse_state.nr_groups;
+ evlist->nr_groups += parse_state->nr_groups;
last = evlist__last(evlist);
last->cmdline_group_boundary = true;

@@ -2125,6 +2118,35 @@ int parse_events(struct evlist *evlist, const char *str,
return ret;
}

+int parse_events(struct evlist *evlist, const char *str,
+ struct parse_events_error *err)
+{
+ struct parse_events_state parse_state = {
+ .list = LIST_HEAD_INIT(parse_state.list),
+ .idx = evlist->core.nr_entries,
+ .error = err,
+ .evlist = evlist,
+ .stoken = PE_START_EVENTS,
+ };
+
+ return parse_events_state(&parse_state, evlist, str);
+}
+
+int parse_events_fake(struct evlist *evlist, const char *str,
+ struct parse_events_error *err)
+{
+ struct parse_events_state parse_state = {
+ .list = LIST_HEAD_INIT(parse_state.list),
+ .idx = evlist->core.nr_entries,
+ .error = err,
+ .evlist = evlist,
+ .stoken = PE_START_EVENTS,
+ .fake_pmu = true,
+ };
+
+ return parse_events_state(&parse_state, evlist, str);
+}
+
#define MAX_WIDTH 1000
static int get_term_width(void)
{
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 963b0ea6c448..4a23b6cd9924 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -34,6 +34,8 @@ int parse_events_option(const struct option *opt, const char *str, int unset);
int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset);
int parse_events(struct evlist *evlist, const char *str,
struct parse_events_error *error);
+int parse_events_fake(struct evlist *evlist, const char *str,
+ struct parse_events_error *error);
int parse_events_terms(struct list_head *terms, const char *str);
int parse_filter(const struct option *opt, const char *str, int unset);
int exclude_perf(const struct option *opt, const char *arg, int unset);
--
2.25.4