From 9d31cb9395447a62a00402be549f7a55a738d874 Mon Sep 17 00:00:00 2001 From: Ian Rogers Date: Wed, 23 Aug 2023 21:13:17 -0700 Subject: [PATCH] perf parse-events: Improve error message for double setting Double setting information for an event would produce an error message associated with the PMU rather than the term that was double setting. Improve the error message to be on the term. Before: $ perf stat -e 'cpu/inst_retired.any,inst_retired.any/' true event syntax error: 'cpu/inst_retired.any,inst_retired.any/' \___ Bad event or PMU Unabled to find PMU or event on a PMU of 'cpu' Run 'perf list' for a list of valid events $ After: $ perf stat -e 'cpu/inst_retired.any,inst_retired.any/' true event syntax error: '..etired.any,inst_retired.any/' \___ Bad event or PMU Unabled to find PMU or event on a PMU of 'cpu' Initial error: event syntax error: '..etired.any,inst_retired.any/' \___ Attempt to set event's scale twice Run 'perf list' for a list of valid events Signed-off-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Gaosheng Cui Cc: Ingo Molnar Cc: James Clark Cc: Jing Zhang Cc: Jiri Olsa Cc: John Garry Cc: Kajol Jain Cc: Kan Liang Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Rob Herring Link: https://lore.kernel.org/r/20230824041330.266337-6-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/parse-events.c | 2 +- tools/perf/util/pmu.c | 34 +++++++++++++++++++++++++++------- tools/perf/util/pmu.h | 2 +- 3 files changed, 29 insertions(+), 9 deletions(-) diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 7cad82a..781747b 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -1348,7 +1348,7 @@ int parse_events_add_pmu(struct parse_events_state *parse_state, return evsel ? 0 : -ENOMEM; } - if (!parse_state->fake_pmu && perf_pmu__check_alias(pmu, head_config, &info)) + if (!parse_state->fake_pmu && perf_pmu__check_alias(pmu, head_config, &info, err)) return -EINVAL; if (verbose > 1) { diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index d913671..0c82bbe 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -1443,17 +1443,33 @@ static struct perf_pmu_alias *pmu_find_alias(struct perf_pmu *pmu, static int check_info_data(struct perf_pmu_alias *alias, - struct perf_pmu_info *info) + struct perf_pmu_info *info, + struct parse_events_error *err, + int column) { /* * Only one term in event definition can * define unit, scale and snapshot, fail * if there's more than one. */ - if ((info->unit && alias->unit[0]) || - (info->scale && alias->scale) || - (info->snapshot && alias->snapshot)) + if (info->unit && alias->unit[0]) { + parse_events_error__handle(err, column, + strdup("Attempt to set event's unit twice"), + NULL); + return -EINVAL; + } + if (info->scale && alias->scale) { + parse_events_error__handle(err, column, + strdup("Attempt to set event's scale twice"), + NULL); + return -EINVAL; + } + if (info->snapshot && alias->snapshot) { + parse_events_error__handle(err, column, + strdup("Attempt to set event snapshot twice"), + NULL); return -EINVAL; + } if (alias->unit[0]) info->unit = alias->unit; @@ -1472,7 +1488,7 @@ static int check_info_data(struct perf_pmu_alias *alias, * defined for the alias */ int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms, - struct perf_pmu_info *info) + struct perf_pmu_info *info, struct parse_events_error *err) { struct parse_events_term *term, *h; struct perf_pmu_alias *alias; @@ -1493,10 +1509,14 @@ int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms, if (!alias) continue; ret = pmu_alias_terms(alias, &term->list); - if (ret) + if (ret) { + parse_events_error__handle(err, term->err_term, + strdup("Failure to duplicate terms"), + NULL); return ret; + } - ret = check_info_data(alias, info); + ret = check_info_data(alias, info, err, term->err_term); if (ret) return ret; diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h index f37e3d7..03211de 100644 --- a/tools/perf/util/pmu.h +++ b/tools/perf/util/pmu.h @@ -185,7 +185,7 @@ int perf_pmu__config_terms(struct perf_pmu *pmu, __u64 perf_pmu__format_bits(struct perf_pmu *pmu, const char *name); int perf_pmu__format_type(struct perf_pmu *pmu, const char *name); int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms, - struct perf_pmu_info *info); + struct perf_pmu_info *info, struct parse_events_error *err); int perf_pmu__find_event(struct perf_pmu *pmu, const char *event, void *state, pmu_event_callback cb); int perf_pmu__format_parse(struct perf_pmu *pmu, int dirfd, bool eager_load); -- 2.7.4