[PATCH 5/6] perf tools: Add term support for parse_events_error

Jiri Olsa
2015-04-18T17:26:16Z

Allowing event's term processing to report back error, like:

$ ./perf record -e 'cpu/even=0x1/' ls
invalid or unsupported event: 'cpu/even=0x1/'
\___ unknown term

Link: http://lkml.kernel.org/n/tip-xkbpn3j5of376ag7utcirt8w@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/tests/pmu.c | 2 +-
tools/perf/util/parse-events.c | 2 +-
tools/perf/util/pmu.c | 23 +++++++++++++++++------
tools/perf/util/pmu.h | 6 ++++--
4 files changed, 23 insertions(+), 10 deletions(-)

diff --git a/tools/perf/tests/pmu.c b/tools/perf/tests/pmu.c
index eeb68bb1972d..f2655947e37f 100644
--- a/tools/perf/tests/pmu.c
+++ b/tools/perf/tests/pmu.c
@@ -152,7 +152,7 @@ int test__pmu(void)
if (ret)
break;

- ret = perf_pmu__config_terms(&formats, &attr, terms, false);
+ ret = perf_pmu__config_terms(&formats, &attr, terms, false, NULL);
if (ret)
break;

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 3caa6b02d4e5..3c5e658386a1 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -668,7 +668,7 @@ int parse_events_add_pmu(struct parse_events_evlist *data,
*/
config_attr(&attr, head_config, 0);

- if (perf_pmu__config(pmu, &attr, head_config))
+ if (perf_pmu__config(pmu, &attr, head_config, data->error))
return -EINVAL;

evsel = __add_event(list, &data->idx, &attr,
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 48411674da0f..11cdfd37c4e0 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -587,7 +587,7 @@ static int pmu_config_term(struct list_head *formats,
struct perf_event_attr *attr,
struct parse_events_term *term,
struct list_head *head_terms,
- bool zero)
+ bool zero, struct parse_events_error *error)
{
struct perf_pmu_format *format;
__u64 *vp;
@@ -611,6 +611,10 @@ static int pmu_config_term(struct list_head *formats,
if (!format) {
if (verbose)
printf("Invalid event/parameter '%s'\n", term->config);
+ if (error) {
+ error->idx = term->err_term;
+ error->str = strdup("unknown term");
+ }
return -EINVAL;
}

@@ -636,9 +640,14 @@ static int pmu_config_term(struct list_head *formats,
val = term->val.num;
else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) {
if (strcmp(term->val.str, "?")) {
- if (verbose)
+ if (verbose) {
pr_info("Invalid sysfs entry %s=%s\n",
term->config, term->val.str);
+ }
+ if (error) {
+ error->idx = term->err_val;
+ error->str = strdup("expected numeric value");
+ }
return -EINVAL;
}

@@ -654,12 +663,13 @@ static int pmu_config_term(struct list_head *formats,
int perf_pmu__config_terms(struct list_head *formats,
struct perf_event_attr *attr,
struct list_head *head_terms,
- bool zero)
+ bool zero, struct parse_events_error *error)
{
struct parse_events_term *term;

list_for_each_entry(term, head_terms, list) {
- if (pmu_config_term(formats, attr, term, head_terms, zero))
+ if (pmu_config_term(formats, attr, term, head_terms,
+ zero, error))
return -EINVAL;
}

@@ -672,12 +682,13 @@ int perf_pmu__config_terms(struct list_head *formats,
* 2) pmu format definitions - specified by pmu parameter
*/
int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
- struct list_head *head_terms)
+ struct list_head *head_terms,
+ struct parse_events_error *error)
{
bool zero = !!pmu->default_config;

attr->type = pmu->type;
- return perf_pmu__config_terms(&pmu->format, attr, head_terms, zero);
+ return perf_pmu__config_terms(&pmu->format, attr, head_terms, zero, error);
}

static struct perf_pmu_alias *pmu_find_alias(struct perf_pmu *pmu,
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index 6b1249fbdb5f..7b9c8cf8ae3e 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -4,6 +4,7 @@
#include <linux/bitmap.h>
#include <linux/perf_event.h>
#include <stdbool.h>
+#include "parse-events.h"

enum {
PERF_PMU_FORMAT_VALUE_CONFIG,
@@ -47,11 +48,12 @@ struct perf_pmu_alias {

struct perf_pmu *perf_pmu__find(const char *name);
int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
- struct list_head *head_terms);
+ struct list_head *head_terms,
+ struct parse_events_error *error);
int perf_pmu__config_terms(struct list_head *formats,
struct perf_event_attr *attr,
struct list_head *head_terms,
- bool zero);
+ bool zero, struct parse_events_error *error);
int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
struct perf_pmu_info *info);
struct list_head *perf_pmu__alias(struct perf_pmu *pmu,
--
1.9.3