From d3abd7b8bd8af16703e81410de3e35bf4de3a9ce Mon Sep 17 00:00:00 2001 From: Ian Rogers Date: Fri, 12 Aug 2022 16:09:47 -0700 Subject: perf metrics: Copy entire pmu_event in find metric The pmu_event passed to the pmu_events_table_for_each_event is invalid after the loop. Copy the entire struct in metricgroup__find_metric. Reduce the scope of this function to static. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: John Garry Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Mike Leach Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Stephane Eranian Cc: Will Deacon Cc: Xing Zhengjun Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20220812230949.683239-13-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/metricgroup.c | 33 ++++++++++++++++++--------------- tools/perf/util/metricgroup.h | 2 -- 2 files changed, 18 insertions(+), 17 deletions(-) (limited to 'tools') diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c index 42a5c8ae915e..464475fd6b9a 100644 --- a/tools/perf/util/metricgroup.c +++ b/tools/perf/util/metricgroup.c @@ -879,6 +879,10 @@ struct metricgroup_add_iter_data { const struct pmu_events_table *table; }; +static bool metricgroup__find_metric(const char *metric, + const struct pmu_events_table *table, + struct pmu_event *pe); + static int add_metric(struct list_head *metric_list, const struct pmu_event *pe, const char *modifier, @@ -914,7 +918,7 @@ static int resolve_metric(struct list_head *metric_list, size_t bkt; struct to_resolve { /* The metric to resolve. */ - const struct pmu_event *pe; + struct pmu_event pe; /* * The key in the IDs map, this may differ from in case, * etc. from pe->metric_name. @@ -928,16 +932,15 @@ static int resolve_metric(struct list_head *metric_list, * the pending array. */ hashmap__for_each_entry(root_metric->pctx->ids, cur, bkt) { - const struct pmu_event *pe; + struct pmu_event pe; - pe = metricgroup__find_metric(cur->key, table); - if (pe) { + if (metricgroup__find_metric(cur->key, table, &pe)) { pending = realloc(pending, (pending_cnt + 1) * sizeof(struct to_resolve)); if (!pending) return -ENOMEM; - pending[pending_cnt].pe = pe; + memcpy(&pending[pending_cnt].pe, &pe, sizeof(pe)); pending[pending_cnt].key = cur->key; pending_cnt++; } @@ -952,7 +955,7 @@ static int resolve_metric(struct list_head *metric_list, * context. */ for (i = 0; i < pending_cnt; i++) { - ret = add_metric(metric_list, pending[i].pe, modifier, metric_no_group, + ret = add_metric(metric_list, &pending[i].pe, modifier, metric_no_group, root_metric, visited, table); if (ret) break; @@ -1073,7 +1076,7 @@ static int __add_metric(struct list_head *metric_list, struct metricgroup__find_metric_data { const char *metric; - const struct pmu_event *pe; + struct pmu_event *pe; }; static int metricgroup__find_metric_callback(const struct pmu_event *pe, @@ -1085,21 +1088,21 @@ static int metricgroup__find_metric_callback(const struct pmu_event *pe, if (!match_metric(pe->metric_name, data->metric)) return 0; - data->pe = pe; - return -1; + memcpy(data->pe, pe, sizeof(*pe)); + return 1; } -const struct pmu_event *metricgroup__find_metric(const char *metric, - const struct pmu_events_table *table) +static bool metricgroup__find_metric(const char *metric, + const struct pmu_events_table *table, + struct pmu_event *pe) { struct metricgroup__find_metric_data data = { .metric = metric, - .pe = NULL, + .pe = pe, }; - pmu_events_table_for_each_event(table, metricgroup__find_metric_callback, &data); - - return data.pe; + return pmu_events_table_for_each_event(table, metricgroup__find_metric_callback, &data) + ? true : false; } static int add_metric(struct list_head *metric_list, diff --git a/tools/perf/util/metricgroup.h b/tools/perf/util/metricgroup.h index f54d170043e9..016b3b1a289a 100644 --- a/tools/perf/util/metricgroup.h +++ b/tools/perf/util/metricgroup.h @@ -69,8 +69,6 @@ int metricgroup__parse_groups(const struct option *opt, bool metric_no_group, bool metric_no_merge, struct rblist *metric_events); -const struct pmu_event *metricgroup__find_metric(const char *metric, - const struct pmu_events_table *table); int metricgroup__parse_groups_test(struct evlist *evlist, const struct pmu_events_table *table, const char *str, -- cgit v1.2.3