From ffeb883e5662e94b14948078e85812261277ad67 Mon Sep 17 00:00:00 2001 From: He Kuang Date: Mon, 28 Sep 2015 03:52:14 +0000 Subject: [PATCH] perf tools: Show proper error message for wrong terms of hw/sw events Show proper error message and show valid terms when wrong config terms is specified for hw/sw type perf events. This patch makes the original error format function formats_error_string() more generic, which only outputs the static config terms for hw/sw perf events, and prepends pmu formats for pmu events. Before this patch: $ perf record -e 'cpu-clock/freqx=200/' -a sleep 1 invalid or unsupported event: 'cpu-clock/freqx=200/' Run 'perf list' for a list of valid events usage: perf record [] [] or: perf record [] -- [] -e, --event event selector. use 'perf list' to list available events After this patch: $ perf record -e 'cpu-clock/freqx=200/' -a sleep 1 event syntax error: 'cpu-clock/freqx=200/' \___ unknown term valid terms: config,config1,config2,name,period,freq,branch_type,time,call-graph,stack-size Run 'perf list' for a list of valid events usage: perf record [] [] or: perf record [] -- [] -e, --event event selector. use 'perf list' to list available events Signed-off-by: He Kuang Acked-by: Jiri Olsa Cc: Adrian Hunter Cc: Kan Liang Cc: Peter Zijlstra Cc: Wang Nan Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1443412336-120050-2-git-send-email-hekuang@huawei.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/parse-events.c | 29 ++++++++++++++++++++++++++ tools/perf/util/parse-events.h | 1 + tools/perf/util/parse-events.l | 2 +- tools/perf/util/pmu.c | 37 +++++++++++++--------------------- 4 files changed, 45 insertions(+), 24 deletions(-) diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 9dc3fb6ee81e7..ea64ec0720ca9 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -656,6 +656,9 @@ do { \ CHECK_TYPE_VAL(STR); break; default: + err->str = strdup("unknown term"); + err->idx = term->err_term; + err->help = parse_events_formats_error_string(NULL); return -EINVAL; } @@ -1875,3 +1878,29 @@ void parse_events_evlist_error(struct parse_events_evlist *data, err->str = strdup(str); WARN_ONCE(!err->str, "WARNING: failed to allocate error string"); } + +/* + * Return string contains valid config terms of an event. + * @additional_terms: For terms such as PMU sysfs terms. + */ +char *parse_events_formats_error_string(char *additional_terms) +{ + char *str; + static const char *static_terms = "config,config1,config2,name," + "period,freq,branch_type,time," + "call-graph,stack-size\n"; + + /* valid terms */ + if (additional_terms) { + if (!asprintf(&str, "valid terms: %s,%s", + additional_terms, static_terms)) + goto fail; + } else { + if (!asprintf(&str, "valid terms: %s", static_terms)) + goto fail; + } + return str; + +fail: + return NULL; +} diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h index ffee7ece75a66..c7b904a49189d 100644 --- a/tools/perf/util/parse-events.h +++ b/tools/perf/util/parse-events.h @@ -156,5 +156,6 @@ int print_hwcache_events(const char *event_glob, bool name_only); extern int is_valid_tracepoint(const char *event_string); int valid_event_mount(const char *eventfs); +char *parse_events_formats_error_string(char *additional_terms); #endif /* __PERF_PARSE_EVENTS_H */ diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l index 936d566f48d8d..c29832bce496f 100644 --- a/tools/perf/util/parse-events.l +++ b/tools/perf/util/parse-events.l @@ -174,7 +174,7 @@ modifier_bp [rwx]{1,3} { /* - * Please update formats_error_string any time + * Please update parse_events_formats_error_string any time * new static term is added. */ config { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG); } diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index 89c91a1a67e76..ac42c97be9e40 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -626,38 +626,26 @@ static int pmu_resolve_param_term(struct parse_events_term *term, return -1; } -static char *formats_error_string(struct list_head *formats) +static char *pmu_formats_string(struct list_head *formats) { struct perf_pmu_format *format; - char *err, *str; - static const char *static_terms = "config,config1,config2,name," - "period,freq,branch_type,time," - "call-graph,stack-size\n"; + char *str; + struct strbuf buf; unsigned i = 0; - if (!asprintf(&str, "valid terms:")) + if (!formats) return NULL; + strbuf_init(&buf, 0); /* sysfs exported terms */ - list_for_each_entry(format, formats, list) { - char c = i++ ? ',' : ' '; - - err = str; - if (!asprintf(&str, "%s%c%s", err, c, format->name)) - goto fail; - free(err); - } + list_for_each_entry(format, formats, list) + strbuf_addf(&buf, i++ ? ",%s" : "%s", + format->name); - /* static terms */ - err = str; - if (!asprintf(&str, "%s,%s", err, static_terms)) - goto fail; + str = strbuf_detach(&buf, NULL); + strbuf_release(&buf); - free(err); return str; -fail: - free(err); - return NULL; } /* @@ -693,9 +681,12 @@ static int pmu_config_term(struct list_head *formats, if (verbose) printf("Invalid event/parameter '%s'\n", term->config); if (err) { + char *pmu_term = pmu_formats_string(formats); + err->idx = term->err_term; err->str = strdup("unknown term"); - err->help = formats_error_string(formats); + err->help = parse_events_formats_error_string(pmu_term); + free(pmu_term); } return -EINVAL; }