[PATCH V2 3/3] perf tools: Do not pass NULL to parse_events()

From: Adrian Hunter
Date: Tue Aug 09 2022 - 04:07:38 EST

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Previous message: Adrian Hunter: "[PATCH V2 2/3] perf tests: Fix Track with sched_switch test for hybrid case"
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Many cases do not use the extra error information provided by
parse_events and instead pass NULL as the struct parse_events_error
pointer. Add a wrapper for those cases so that the pointer is never
NULL.

Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
---
tools/perf/arch/arm/util/cs-etm.c | 2 +-
tools/perf/arch/arm64/util/arm-spe.c | 2 +-
tools/perf/arch/x86/tests/intel-cqm.c | 2 +-
tools/perf/arch/x86/util/intel-bts.c | 2 +-
tools/perf/arch/x86/util/intel-pt.c | 2 +-
tools/perf/arch/x86/util/iostat.c | 2 +-
tools/perf/arch/x86/util/topdown.c | 2 +-
tools/perf/tests/code-reading.c | 2 +-
tools/perf/tests/event-times.c | 2 +-
tools/perf/tests/evsel-roundtrip-name.c | 4 ++--
tools/perf/tests/hists_cumulate.c | 2 +-
tools/perf/tests/hists_filter.c | 4 ++--
tools/perf/tests/hists_link.c | 4 ++--
tools/perf/tests/hists_output.c | 2 +-
tools/perf/tests/keep-tracking.c | 4 ++--
tools/perf/tests/perf-time-to-tsc.c | 2 +-
tools/perf/tests/switch-tracking.c | 12 ++++++------
tools/perf/util/bpf-loader.c | 2 +-
tools/perf/util/parse-events.c | 18 ++++++++++++------
tools/perf/util/parse-events.h | 4 ++++
tools/perf/util/perf_api_probe.c | 2 +-
tools/perf/util/record.c | 2 +-
22 files changed, 45 insertions(+), 35 deletions(-)

diff --git a/tools/perf/arch/arm/util/cs-etm.c b/tools/perf/arch/arm/util/cs-etm.c
index 1b54638d53b0..a346d5f3dafa 100644
--- a/tools/perf/arch/arm/util/cs-etm.c
+++ b/tools/perf/arch/arm/util/cs-etm.c
@@ -438,7 +438,7 @@ static int cs_etm_recording_options(struct auxtrace_record *itr,
if (opts->full_auxtrace) {
struct evsel *tracking_evsel;

- err = parse_events(evlist, "dummy:u", NULL);
+ err = parse_event(evlist, "dummy:u");
if (err)
goto out;

diff --git a/tools/perf/arch/arm64/util/arm-spe.c b/tools/perf/arch/arm64/util/arm-spe.c
index 6f4db2ac5420..d4c234076541 100644
--- a/tools/perf/arch/arm64/util/arm-spe.c
+++ b/tools/perf/arch/arm64/util/arm-spe.c
@@ -257,7 +257,7 @@ static int arm_spe_recording_options(struct auxtrace_record *itr,
evsel__set_sample_bit(arm_spe_evsel, PHYS_ADDR);

/* Add dummy event to keep tracking */
- err = parse_events(evlist, "dummy:u", NULL);
+ err = parse_event(evlist, "dummy:u");
if (err)
return err;

diff --git a/tools/perf/arch/x86/tests/intel-cqm.c b/tools/perf/arch/x86/tests/intel-cqm.c
index cb5b2c6c3b3b..360a082fc928 100644
--- a/tools/perf/arch/x86/tests/intel-cqm.c
+++ b/tools/perf/arch/x86/tests/intel-cqm.c
@@ -56,7 +56,7 @@ int test__intel_cqm_count_nmi_context(struct test_suite *test __maybe_unused, in
return TEST_FAIL;
}

- ret = parse_events(evlist, "intel_cqm/llc_occupancy/", NULL);
+ ret = parse_event(evlist, "intel_cqm/llc_occupancy/");
if (ret) {
pr_debug("parse_events failed, is \"intel_cqm/llc_occupancy/\" available?\n");
err = TEST_SKIP;
diff --git a/tools/perf/arch/x86/util/intel-bts.c b/tools/perf/arch/x86/util/intel-bts.c
index bcccfbade5c6..439c2956f3e7 100644
--- a/tools/perf/arch/x86/util/intel-bts.c
+++ b/tools/perf/arch/x86/util/intel-bts.c
@@ -233,7 +233,7 @@ static int intel_bts_recording_options(struct auxtrace_record *itr,
struct evsel *tracking_evsel;
int err;

- err = parse_events(evlist, "dummy:u", NULL);
+ err = parse_event(evlist, "dummy:u");
if (err)
return err;

diff --git a/tools/perf/arch/x86/util/intel-pt.c b/tools/perf/arch/x86/util/intel-pt.c
index 06c2cdfd8f2f..13933020a79e 100644
--- a/tools/perf/arch/x86/util/intel-pt.c
+++ b/tools/perf/arch/x86/util/intel-pt.c
@@ -426,7 +426,7 @@ static int intel_pt_track_switches(struct evlist *evlist)
if (!evlist__can_select_event(evlist, sched_switch))
return -EPERM;

- err = parse_events(evlist, sched_switch, NULL);
+ err = parse_event(evlist, sched_switch);
if (err) {
pr_debug2("%s: failed to parse %s, error %d\n",
__func__, sched_switch, err);
diff --git a/tools/perf/arch/x86/util/iostat.c b/tools/perf/arch/x86/util/iostat.c
index 792cd75ade33..404de795ec0b 100644
--- a/tools/perf/arch/x86/util/iostat.c
+++ b/tools/perf/arch/x86/util/iostat.c
@@ -316,7 +316,7 @@ static int iostat_event_group(struct evlist *evl,
sprintf(iostat_cmd, iostat_cmd_template,
list->rps[idx]->pmu_idx, list->rps[idx]->pmu_idx,
list->rps[idx]->pmu_idx, list->rps[idx]->pmu_idx);
- ret = parse_events(evl, iostat_cmd, NULL);
+ ret = parse_event(evl, iostat_cmd);
if (ret)
goto err;
}
diff --git a/tools/perf/arch/x86/util/topdown.c b/tools/perf/arch/x86/util/topdown.c
index 67c524324125..54810f9acd6f 100644
--- a/tools/perf/arch/x86/util/topdown.c
+++ b/tools/perf/arch/x86/util/topdown.c
@@ -122,5 +122,5 @@ int topdown_parse_events(struct evlist *evlist)
topdown_events = TOPDOWN_L1_EVENTS;
}

- return parse_events(evlist, topdown_events, NULL);
+ return parse_event(evlist, topdown_events);
}
diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index 5610767b407f..95feb6ef34a0 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -638,7 +638,7 @@ static int do_test_code_reading(bool try_kcore)

str = do_determine_event(excl_kernel);
pr_debug("Parsing event '%s'\n", str);
- ret = parse_events(evlist, str, NULL);
+ ret = parse_event(evlist, str);
if (ret < 0) {
pr_debug("parse_events failed\n");
goto out_put;
diff --git a/tools/perf/tests/event-times.c b/tools/perf/tests/event-times.c
index 7606eb3df92f..e155f0e0e04d 100644
--- a/tools/perf/tests/event-times.c
+++ b/tools/perf/tests/event-times.c
@@ -174,7 +174,7 @@ static int test_times(int (attach)(struct evlist *),
goto out_err;
}

- err = parse_events(evlist, "cpu-clock:u", NULL);
+ err = parse_event(evlist, "cpu-clock:u");
if (err) {
pr_debug("failed to parse event cpu-clock:u\n");
goto out_err;
diff --git a/tools/perf/tests/evsel-roundtrip-name.c b/tools/perf/tests/evsel-roundtrip-name.c
index 9d3c64974f77..e94fed901992 100644
--- a/tools/perf/tests/evsel-roundtrip-name.c
+++ b/tools/perf/tests/evsel-roundtrip-name.c
@@ -27,7 +27,7 @@ static int perf_evsel__roundtrip_cache_name_test(void)

for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
__evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
- err = parse_events(evlist, name, NULL);
+ err = parse_event(evlist, name);
if (err)
ret = err;
}
@@ -75,7 +75,7 @@ static int __perf_evsel__name_array_test(const char *const names[], int nr_names
return -ENOMEM;

for (i = 0; i < nr_names; ++i) {
- err = parse_events(evlist, names[i], NULL);
+ err = parse_event(evlist, names[i]);
if (err) {
pr_debug("failed to parse event '%s', err %d\n",
names[i], err);
diff --git a/tools/perf/tests/hists_cumulate.c b/tools/perf/tests/hists_cumulate.c
index 17f4fcd6bdce..b42d37ff2399 100644
--- a/tools/perf/tests/hists_cumulate.c
+++ b/tools/perf/tests/hists_cumulate.c
@@ -706,7 +706,7 @@ static int test__hists_cumulate(struct test_suite *test __maybe_unused, int subt

TEST_ASSERT_VAL("No memory", evlist);

- err = parse_events(evlist, "cpu-clock", NULL);
+ err = parse_event(evlist, "cpu-clock");
if (err)
goto out;
err = TEST_FAIL;
diff --git a/tools/perf/tests/hists_filter.c b/tools/perf/tests/hists_filter.c
index 08cbeb9e39ae..8e1ceeb9b7b6 100644
--- a/tools/perf/tests/hists_filter.c
+++ b/tools/perf/tests/hists_filter.c
@@ -111,10 +111,10 @@ static int test__hists_filter(struct test_suite *test __maybe_unused, int subtes

TEST_ASSERT_VAL("No memory", evlist);

- err = parse_events(evlist, "cpu-clock", NULL);
+ err = parse_event(evlist, "cpu-clock");
if (err)
goto out;
- err = parse_events(evlist, "task-clock", NULL);
+ err = parse_event(evlist, "task-clock");
if (err)
goto out;
err = TEST_FAIL;
diff --git a/tools/perf/tests/hists_link.c b/tools/perf/tests/hists_link.c
index c575e13a850d..14b2ff808b5e 100644
--- a/tools/perf/tests/hists_link.c
+++ b/tools/perf/tests/hists_link.c
@@ -276,10 +276,10 @@ static int test__hists_link(struct test_suite *test __maybe_unused, int subtest
if (evlist == NULL)
return -ENOMEM;

- err = parse_events(evlist, "cpu-clock", NULL);
+ err = parse_event(evlist, "cpu-clock");
if (err)
goto out;
- err = parse_events(evlist, "task-clock", NULL);
+ err = parse_event(evlist, "task-clock");
if (err)
goto out;

diff --git a/tools/perf/tests/hists_output.c b/tools/perf/tests/hists_output.c
index 0bde4a768c15..62b0093253e3 100644
--- a/tools/perf/tests/hists_output.c
+++ b/tools/perf/tests/hists_output.c
@@ -593,7 +593,7 @@ static int test__hists_output(struct test_suite *test __maybe_unused, int subtes

TEST_ASSERT_VAL("No memory", evlist);

- err = parse_events(evlist, "cpu-clock", NULL);
+ err = parse_event(evlist, "cpu-clock");
if (err)
goto out;
err = TEST_FAIL;
diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
index dd2067312452..8f4f9b632e1e 100644
--- a/tools/perf/tests/keep-tracking.c
+++ b/tools/perf/tests/keep-tracking.c
@@ -89,8 +89,8 @@ static int test__keep_tracking(struct test_suite *test __maybe_unused, int subte

perf_evlist__set_maps(&evlist->core, cpus, threads);

- CHECK__(parse_events(evlist, "dummy:u", NULL));
- CHECK__(parse_events(evlist, "cycles:u", NULL));
+ CHECK__(parse_event(evlist, "dummy:u"));
+ CHECK__(parse_event(evlist, "cycles:u"));

evlist__config(evlist, &opts, NULL);

diff --git a/tools/perf/tests/perf-time-to-tsc.c b/tools/perf/tests/perf-time-to-tsc.c
index 7c7d20fc503a..26ce30a35191 100644
--- a/tools/perf/tests/perf-time-to-tsc.c
+++ b/tools/perf/tests/perf-time-to-tsc.c
@@ -100,7 +100,7 @@ static int test__perf_time_to_tsc(struct test_suite *test __maybe_unused, int su

perf_evlist__set_maps(&evlist->core, cpus, threads);

- CHECK__(parse_events(evlist, "cycles:u", NULL));
+ CHECK__(parse_event(evlist, "cycles:u"));

evlist__config(evlist, &opts, NULL);

diff --git a/tools/perf/tests/switch-tracking.c b/tools/perf/tests/switch-tracking.c
index 6f53bee33f7c..2d46af9ef935 100644
--- a/tools/perf/tests/switch-tracking.c
+++ b/tools/perf/tests/switch-tracking.c
@@ -364,7 +364,7 @@ static int test__switch_tracking(struct test_suite *test __maybe_unused, int sub
perf_evlist__set_maps(&evlist->core, cpus, threads);

/* First event */
- err = parse_events(evlist, "cpu-clock:u", NULL);
+ err = parse_event(evlist, "cpu-clock:u");
if (err) {
pr_debug("Failed to parse event dummy:u\n");
goto out_err;
@@ -375,14 +375,14 @@ static int test__switch_tracking(struct test_suite *test __maybe_unused, int sub
/* Second event */
if (perf_pmu__has_hybrid()) {
cycles = "cpu_core/cycles/u";
- err = parse_events(evlist, cycles, NULL);
+ err = parse_event(evlist, cycles);
if (err) {
cycles = "cpu_atom/cycles/u";
pr_debug("Trying %s\n", cycles);
- err = parse_events(evlist, cycles, NULL);
+ err = parse_event(evlist, cycles);
}
} else {
- err = parse_events(evlist, cycles, NULL);
+ err = parse_event(evlist, cycles);
}
if (err) {
pr_debug("Failed to parse event %s\n", cycles);
@@ -398,7 +398,7 @@ static int test__switch_tracking(struct test_suite *test __maybe_unused, int sub
goto out;
}

- err = parse_events(evlist, sched_switch, NULL);
+ err = parse_event(evlist, sched_switch);
if (err) {
pr_debug("Failed to parse event %s\n", sched_switch);
goto out_err;
@@ -428,7 +428,7 @@ static int test__switch_tracking(struct test_suite *test __maybe_unused, int sub
evsel__set_sample_bit(cycles_evsel, TIME);

/* Fourth event */
- err = parse_events(evlist, "dummy:u", NULL);
+ err = parse_event(evlist, "dummy:u");
if (err) {
pr_debug("Failed to parse event dummy:u\n");
goto out_err;
diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c
index d2c9b09ddb48..e2052f4fed33 100644
--- a/tools/perf/util/bpf-loader.c
+++ b/tools/perf/util/bpf-loader.c
@@ -1879,7 +1879,7 @@ struct evsel *bpf__setup_output_event(struct evlist *evlist, const char *name)
if (asprintf(&event_definition, "bpf-output/no-inherit=1,name=%s/", name) < 0)
return ERR_PTR(-ENOMEM);

- err = parse_events(evlist, event_definition, NULL);
+ err = parse_event(evlist, event_definition);
free(event_definition);

if (err) {
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index dfc7d7a0ec4e..f05e15acd33f 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -2240,6 +2240,17 @@ int __parse_events(struct evlist *evlist, const char *str,
return ret;
}

+int parse_event(struct evlist *evlist, const char *str)
+{
+ struct parse_events_error err;
+ int ret;
+
+ parse_events_error__init(&err);
+ ret = parse_events(evlist, str, &err);
+ parse_events_error__exit(&err);
+ return ret;
+}
+
void parse_events_error__init(struct parse_events_error *err)
{
bzero(err, sizeof(*err));
@@ -2256,13 +2267,8 @@ void parse_events_error__exit(struct parse_events_error *err)
void parse_events_error__handle(struct parse_events_error *err, int idx,
char *str, char *help)
{
- if (WARN(!str, "WARNING: failed to provide error string\n"))
- goto out_free;
- if (!err) {
- /* Assume caller does not want message printed */
- pr_debug("event syntax error: %s\n", str);
+ if (WARN(!str || !err, "WARNING: failed to provide error string or struct\n"))
goto out_free;
- }
switch (err->num_errors) {
case 0:
err->idx = idx;
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index ba9fa3ddaf6e..7e6a601d9cd0 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -24,15 +24,19 @@ const char *event_type(int type);

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);
+__attribute__((nonnull(1, 2, 3)))
int __parse_events(struct evlist *evlist, const char *str, struct parse_events_error *error,
struct perf_pmu *fake_pmu);

+__attribute__((nonnull))
static inline int parse_events(struct evlist *evlist, const char *str,
struct parse_events_error *err)
{
return __parse_events(evlist, str, err, NULL);
}

+int parse_event(struct evlist *evlist, const char *str);
+
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);
diff --git a/tools/perf/util/perf_api_probe.c b/tools/perf/util/perf_api_probe.c
index c28dd50bd571..e1e2d701599c 100644
--- a/tools/perf/util/perf_api_probe.c
+++ b/tools/perf/util/perf_api_probe.c
@@ -23,7 +23,7 @@ static int perf_do_probe_api(setup_probe_fn_t fn, struct perf_cpu cpu, const cha
if (!evlist)
return -ENOMEM;

- if (parse_events(evlist, str, NULL))
+ if (parse_event(evlist, str))
goto out_delete;

evsel = evlist__first(evlist);
diff --git a/tools/perf/util/record.c b/tools/perf/util/record.c
index b529636ab3ea..7b58f6c7c69d 100644
--- a/tools/perf/util/record.c
+++ b/tools/perf/util/record.c
@@ -238,7 +238,7 @@ bool evlist__can_select_event(struct evlist *evlist, const char *str)
if (!temp_evlist)
return false;

- err = parse_events(temp_evlist, str, NULL);
+ err = parse_event(temp_evlist, str);
if (err)
goto out_delete;

--
2.25.1

Next message: ChristophHellwig: "Re: [PATCH] mtd_blkdevs: add mtd_table_mutex lock back to blktrans_{open, release} to avoid race condition"
Previous message: Adrian Hunter: "[PATCH V2 2/3] perf tests: Fix Track with sched_switch test for hybrid case"
In reply to: Adrian Hunter: "[PATCH V2 2/3] perf tests: Fix Track with sched_switch test for hybrid case"
Next in thread: Arnaldo Carvalho de Melo: "Re: [PATCH V2 0/3] perf tests: Fix Track with sched_switch test for hybrid case"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]